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Presenter Name: Refugio M. Rochn

Contracting to : Pirooz Barar and Associates, Dawson Wells Consulting, and Benico Construction

Nature Acoustical

SOHA Engineers

Systems Engineering Limited

Company Names Presented in Portfolio:

Description

This Presentation Portfolio provides a retrospective view of work accomplished over the last 6 years + with a brief overview to 1994.

2009 - Present Resum and Example Software1.

2008 - 2009 Work With SOHA Engineers in San Francisco2.

2004 - 2008 Work With Systems Engineering Limited in the British Virgin Islands3.

Portfolio Contents

Strong Subject Fields: Plates & Shells (Dr. E. Luco), Structural Analysis (Dr. Frieder Seible), Mathematical Physics (Dr. NeNasser, Solid Mechanics (Dr. H. Murakami), Numerical Methods (Dr. R.J. Asaro), Steel Design (Dr. C-M Uang)

Bachelor's of Science, University of California, San Diego in La Jolla, Received June 14, 1996, GPA 3.14/4.00

Thesis: Shape Control of a Composite Mirror Substrate Utilizing Shape Memory Alloy

Dr. Arup K. Maji, Specialities in Smart & Adaptive Structures, Composite Materials & Nuclear Transport

Graduating Advisor

Dr. Walter Gerstle (Prof. Computational Mechanics) & Dr. Peter Wegner (Prof. Composite Materials)

Thesis Advisory Committee Members

Project Advisors at ATR Institute: Dr. Gordon McKeene & Lecturer Lary Lenke

Master's of Science, University of New Mexico in Albuquerque, Received December 16, 2000, GPA 3.66/4.00

Education

1997 http://www.postensoft.com/ O'Reilly and Associates and O'Neal and Associates both merged to build Posten.

1997 http://www.bay-ship.com/ Bay Ship & Yacht was probably not even a quarter the size of what it is now.

1998 - 2000 http://www.unm.edu/~civil/ & http://www.unm.edu/~atr/ & http://www.kirtland.af.mil/afrl_vs/

2000 - 2003 What was Boyle Engineering Corporation has merged with AECOM http://www.aecom.com/

2004 - 2008 http://www.systemscaribbean.com Systems Engineering in the news http://tiny.cc/srkth

2008 - 2009 http://www.soha.com/ Long-term established firm in San Francisco since 1965, original owner still going strong.

http://pbandainc.com Pirooz Barar individually established PB&A in 1983 after 16 years into career.

http://tiny.cc/azzt3 Links to contact information for Benny Shalom of Benico Construction, long-term individual career as engineer and

contractor

http://tiny.cc/qokwe Dawson Wells Consulting in current headline news BVI.

2009 - http://natureacoustical.pbworks.com Current website, conceptual framework, focus in engineering education

Company Websites Throughout Career since B.S. at UCSD

Structural Design Engineer with experience in the design, analysis, and detailing of office buildings, residences, retaining w alls, soil-

integrated walls (ie MSE and Soil Nailing), internal foundation improvement mix columns/piles, mat and strip foundations, underpi

(concrete and steel), permanent and temporary shoring, demolition, strut-and-tie design for deep beams and walls, lateral load sys

slab deck bridges, pre- and post- tensioned concrete bridge beams, seismic design of bridges, and buildings up to 8 stories. Experie

ship rehabilitation, DNC/CAD inter-linkages, and Hull design. Experience with adaptable optics research, space systems, and comp

materials design, manufacturing, and assembly. Experience with underwater acoustical systems, passive receiving dishes, and seal

underwater canisters. Experience with construction observation of concrete and masonry structures. Experience with Water -barri

designs.

Project Managing Engineer with experience leading design efforts in Resort Design, Technical projects with seismic and hurric ane lo

distribution, complex connection issues from non-matching materials, ie steel to masonry and concrete, and aluminum to protrude

reinforced rods into a fiber-composite base. Design-Build work with 5-Story Concrete Building with SMRF : Infilled Masonry Walls La

load system.

Project Coordination for BART Utilities and Drafting standards.

Project Quality Review for Glendale Seventh Day Adventist Hospital

Construction Administration for large scale hospital shoring projects, and two small scale drilled shaft pile walls.

Experience Summary

Refugio Rochin Projects since August 2004Monday, November 15, 2010

12:56 PM

NAXUTL Page 1
http://www.postensoft.com/http://www.postensoft.com/http://www.bay-ship.com/http://www.bay-ship.com/http://www.unm.edu/~civil/http://www.unm.edu/~civil/http://www.unm.edu/~atr/http://www.unm.edu/~atr/http://www.kirtland.af.mil/afrl_vs/http://www.aecom.com/http://tiny.cc/srkthhttp://pbandainc.com/http://pbandainc.com/http://tiny.cc/azzt3http://tiny.cc/azzt3http://tiny.cc/qokwehttp://tiny.cc/qokwehttp://natureacoustical.pbworks.com/http://natureacoustical.pbworks.com/http://natureacoustical.pbworks.com/http://tiny.cc/qokwehttp://tiny.cc/azzt3http://pbandainc.com/http://tiny.cc/srkthhttp://www.aecom.com/http://www.kirtland.af.mil/afrl_vs/http://www.unm.edu/~atr/http://www.unm.edu/~civil/http://www.bay-ship.com/http://www.postensoft.com/


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Wind Loading Main Profile Input-OutputMonday, November 15, 2010

7:15 AM

NAXUTL Page 3


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Topographic FactorsMonday, November 15, 2010

7:19 AM

NAXUTL Page 4


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This Program allows for the Calculations of Standing Towers, with Antennas, and fluxing modules.

CfStanding TowerMonday, November 15, 2010

7:22 AM

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Design Response Spectra & Equivalent Lateral Force ProcedureMonday, November 22, 2010

8:44 PM

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Gravity, Live and Seismic LoadsWednesday, November 17, 2010

12:42 AM

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ISAACSON RESIDENCE - BENICO - FLAT SLAB WORKWednesday, December 08, 2010

12:41 PM

NAXUTL Page 8


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Project Client Cost Completion Services Provided Project Description

JOMA Barracks Building JOMA Properties $2M 6/2006 Structural design Four story office building on plied foundaRoad Town

Peebles Hospital B.V.I.

Construction starts 10/2005

BVI Government $45M 6/2007 Civil and structural design

Site supervision of civil andstructural works.

New 7 story hospital on very steep site. 1

ft. in steel.

Marias Office Building II Private Owner $5M 12/2006 Design Consulting New 5 story office building with piled fouin Road Town.

Veterans Housing Project St.Thomas USVI

USVI Government $19M 12/2006 Civil & structural design. New housing complex comprising 13 threbungalows and one 6 story building.

Virgin Gorda Yacht HarborBuildings I and II

R Penn & Associates $15M 10/2006 Structural Design and FieldServices

Two 3 Story office complexes in Virgin Gpiled foundations, Banco Popular regulatiBuilding

Systems Engineering Typical Project ProfilesMonday, November 15, 2010

6:10 AM

SYTMENG Page 10


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JOMA Properties : O'Neal Building

The O'Neal Building is still the most interesting building that I have

worked on in my career as a Civil-Structural Engineer for several reasons.

First of all, the building suffered from 5 structural irregularities

incorporating a weak story at the lower two floors, differential masses at

all of the floors greater than code differentials, different materials at each

floor, level, and vertical and horizontal load path irregularities. Thebuilding gets longer moving up towards the 4th floor, due to the setback

in the hill. And, the materials are very interesting, with an enormous

column approximately 4 feet in diameter. Thus I began to develop a

dynamic evaluation of the building to satisfy analysis requirements with

irregular buildings, which became rather cumbersome to minimize in

detail language. The experience was a terrific learning experience. I am

currently undergoing final analysis computations. The client postponed

these analyses, now I am conducting the work for educational purposes.

The JOMA Barracks was my first on island project, a

building was under construction when I arrived. Th

building piles had begun to be driven, and I worked

coordinating the construction work with the drawi

while renderin a few design details with sketch wo

JOMA Properties : Barracks Building

JOMA Properties : Commerce House

JOMA PropertiesMonday, November 15, 2010

5:56 AM

SYTMENG Page 11
http://www.jomaproperties.com/new_projects.php?properties_id=6http://www.jomaproperties.com/new_projects.php?properties_id=6


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Note: The model

and drawing is

actually mirrored

from the actual

configuration.

The jutting

portion on the

right is a separate

building attached

at a small bridgewith a flexible

connectivity.

The walls around the basement are mostly made of

placed rock with mortar in the joints, not a usual

masonry style although it appears to be masonry.

The Next floor is a similar material, yet it is very lightcontaining mainly timber framing, while the floor

above (3rd Floor) is a very heavy floor with many

internal wall cubicles, and a terrific number of

internal block walls. The top floor is closer in style to

the 3rd floor, except that the backside contains a

complete car parking lot. The main building connects

to a flexible building at the backend.

I believe it must be partially the great faith of the

Tortolian islanders that keeps the building standing,

because it is one of the oldest buildings in Road

Town, and there are frequent earthquakes of

magnitudes ranging from 3.5-4.5 on the Richter scale.The building appears to survive with a wit from the

chemist that designed and built it in 1967.

The JOMA Commerce House wa

last assignment before leaving t

island. I created a full scale mod

Visual Analysis and STAAD, and

created a first round of analyses

drawing renderings, however, s

the architects ideals were const

changing in highly pertinent sta

points for the structure. Theref

left the island with the mere moand a batch of computations loa

the gills. Upon my return to the

2 years later to work with Daws

Wells, the building was almost

complete in construction. The

contractor moved the architect

change the structures mode

completely, removing the flat sl

a basic steel pan composite dec

was pleased with the structure'

overall configuration, impressed

mode for the front pane installa

although dissatisfied with theprecautions of the crew.

SYTMENG Page 12


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SKN VIBES : St. Kitts and Nevis Online Periodical : January 2009

Pasted from

Peebles Hospital Design Phase 2006-200

After several years of negotiations with B

Officials, Peebles Hospital Design finally

progressed beyond a mere skeleton, and

our company was maneuvering the desig

of PEEBLES HOSPITAL coordinating with

SOUTHERLAND PAGE's architects, mecha

outfitters, and Hospital design experts. D

a hospital especially for the government

which is planning for the entire country a

other regions of the Caribbean, such as S

and Nevis, and perhaps Montserrat in em

events. The hospital is a 7-story steel mo

frame with concrete encasement for fire

corrosion protection, with lateral restrai

further composed of shear walls, bracing

cross-cabling.

My involvement was to complete the sei

system, complete for essential earthqua

standards, and to complete approximate

the details, including the core walls, and

foundation, and the dual-directional mo

frames including a number of the appurt

while keeping the CAD-Architectural cha

to date.

At the time of my departure from the BVfootings had been cast, while a large seg

a wall that was not tested by geotechnic

engineers due to the governments decis

came to crumble costing a tremendous s

the time..

Peebles Hospital - Community News of Construction ProgressMonday, November 15, 2010

12:44 PM

SYTMENG Page 13
http://www.sknvibes.com/News/NewsDetails.cfm/8320http://bvinews.com/bvi/progress-report-on-the-new-peebles-hospital-statement-by-deputy-premier-and-minister-of-health-hon-dancia-penn-obe-qc/http://bvinews.com/bvi/progress-report-on-the-new-peebles-hospital-statement-by-deputy-premier-and-minister-of-health-hon-dancia-penn-obe-qc/http://bvinews.com/bvi/progress-report-on-the-new-peebles-hospital-statement-by-deputy-premier-and-minister-of-health-hon-dancia-penn-obe-qc/http://bvinews.com/bvi/progress-report-on-the-new-peebles-hospital-statement-by-deputy-premier-and-minister-of-health-hon-dancia-penn-obe-qc/http://bvinews.com/bvi/progress-report-on-the-new-peebles-hospital-statement-by-deputy-premier-and-minister-of-health-hon-dancia-penn-obe-qc/http://www.sknvibes.com/News/NewsDetails.cfm/8320


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SKN VIBES : St. Kitts and Nevis Online Periodical : September 2008Screen clipping taken: 11/15/2010 12:46 PM

SYTMENG Page 14
http://www.sknvibes.com/Education/NewsDetails.cfm/6356http://www.sknvibes.com/Education/NewsDetails.cfm/6356


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Selected Details (2005 - 2006) Constructed in 2007

Virgin Gorda Yacht Harbor BuildingsThursday, November 25, 2010

5:42 PM

SYTMENG Page 15


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Screen clipping taken: 11/15/2010 12:25 PM


Scrub Island

Systems Engineering Limited has been working on high scale residentia

buildings in the Caribbean for the last 15-20 years, among all of the BV

including Cooper Island, and Guana Island, as well as Mustique one of Grenadines, Nevis, and Anguilla among othersand this project with OB

one of the biggest projects taken to date, completely branding Scrub Is

with the Resort Marina and an entire fleet of new homes. All the whil

Richard Branson was working on his neighboring island Mesquito.

For Scrub Island, our company divided the work, and I worked on the d

for approximately 10 of the residential buildings. Most of the work ou

drafter , Architect/Engineer Mitchell designed, however, my key role w

constantly keeping up a number of the facilities at the level of the acce

projet whilst the sea-bed found a harsh damage due to the interferenc

dusting of the grounds.

In the meantime I worked on a number of conciliatory efforts for much

previous financial damages wrought by hurricanes in ensuing regions.

Scrub Island ResortMonday, November 15, 2010

12:22 PM

SYTMENG Page 17


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My work at Tiwanee Resort involv

Design of Building D, and conductsome calculations for Building blo

and A. I built the scale Finite Elem

model of Building D (at left), and s

the shear walls in the building.

Tiwanee Resort in AnguillaThursday, November 25, 2010

12:28 AM

SYTMENG Page 18


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http://www.perfectplaces.com/vacation-

rentals/147350.htm

Sterling House , owner Donna Sterling

I worked with Donna on this project, it was one

most interesting projects I had for detail and de

We came into the project to modify the existingand to update the design to current Internation

standards. I built a full scale finite element mod

the residence, it was most interesting because D

constantly made changes, and enjoyed working

job with us and the contractors. Most of my dra

were hand drawn sketches, however, the mode

very intricate, utilizing STAAD for plate element

feedback,and Visual Analysis for columns design

Structural Features

Flat Slab Construction.Intricate pool layout over pool house building.

Tower with stair winding around.

Multi-level building with steps internal.

Retaining walls incorporate deadman into hill.

Seismic Design Features

Internal beams in flat slab for punching shear sp

Other Projects at Systems Engineering LimitedTuesday, November 16, 2010

4:09 PM

SYTMENG Page 19
http://www.perfectplaces.com/vacation-rentals/147350.htmhttp://www.perfectplaces.com/vacation-rentals/147350.htmhttp://www.perfectplaces.com/vacation-rentals/147350.htmhttp://www.perfectplaces.com/vacation-rentals/147350.htm


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SOHA Typical Project ProfilesWednesday, December 01, 2010

5:01 PM

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Current Construction Effort Web Cam : SFGH WEB CAM : Excavation Phase


3-D Perspective and Plan Vision

An interesting project, including our sh

portion as our President and Principals d

to invest in the company to train the en

engineering and CAD staff in BIM using R

This was our first project putting Revit to

test.

In the SFGH Moat Wall Project, I gained

preliminary comfort level in interacting w

the government partnerships for our op

meetings within the project scheduling a

coordination group. My first duties invo

identifying existing building information

provided through the internal network o

government documentation detailing al

prior, existing and new construction wit

vicinity. Subsequently we identified seisand gravity lateral earth pressures to be

applied to the proposed moat wall.

The Moat Wall provides a separated sho

wall, separate from the new hospital bu

which inevitably supports the load from

and surroundings, and isolates the build

from moisture and ground movement.

With a team of 4 engineers and three

draftsmen, we utilized the Revit class to

complete the entire Moat Wall and desiprocess within a span of less than 3 mon

from the initial team meeting.

My final contribution involved engineer

tunnel to enter into the existing hospita

building, and to provide shoring for such

tunnel. I utilized RISA for a multiple sho

configuration, and Strut-and-Tie design

demolition and entrance design into the

existing building. The demolition portio

a fair portion of calculations to support t

conservative older designed hospitalparticularly for seismic considerations w

excavation would be open.

SFGH Excavation and Moat Wall InstallationMonday, November 15, 2010

1:10 PM

SOHA Page 21
http://www.onsiteview.com/cams/view_remote.php?license=OSV-6ArUOwhttp://www.laroccadesign.com/pdf/health/SFGH.PDFhttp://www.laroccadesign.com/pdf/health/SFGH.PDFhttp://www.onsiteview.com/cams/view_remote.php?license=OSV-6ArUOw


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Major Environmental Analysis - SFPUC Cases - CEQA Documents

The California Department of Water Resources, Division of Safety of Dams (DSOD), is responsible for regulating all da

in California. In 1983, the DSOD restricted the amount of water the SFPUC could store in Crystal Springs Reservoir bec

of concerns that the dam could be overtopped, and subsequently be damaged and/or even fail, during the Probable

Maximum Flood (PMF). The PMF is the theoretical flood event predicted to occur under the most severe and extreme

combination of meteorological and hydrological conditions in a particular drainage area, and the DSOD includes the P

as part of its design requirements to ensure the safety of the LCSD. Although the PMF has a very low probability of

occurrence, design for the PMF event is mandated by the DSOD as a fail safe design for lesser flood events.

The Lower Crystal Springs Dam Improvement Project is a project that SOHA acquired through the ongoing relationsh

with URS and SFPUC contract services, particulary for SOHA's strengths in Shoring and Trenching. We came into the L

Improvement Project to provide shoring for the new stilling basin designed by URS at the toe of the dam. The figures

below provide a brief visual of the relationship of the dam improvements to the Hetch Hetchy overall project base.

Our involvement concerned providing a temporary

shoring wall for the stability of the land slopes upon

demolition of the existing stilling basin, excavation, reconstruction of the new stilling basin. Assumptio

provided that the Dam itself requires no external su

during the construction. The Dam controllers may

limit the water levels in the reservoir.

With the dam on the active San Andreas Fault, I ex

the temporary shoring wall with a probable expecta

a 50-year seismic event which has been gestured to

anytime in the present based on experimental data

relating the occurrence of earthquakes in the past c

and for the pertinent susceptability of the region.

We utilized soil nail construction design to assist in

down construction and to minimize damage to the

landscaping. The soil nails will remain after the still

basin is cast. A portion of the design project is

demonstrated next in this tabular documentation.

A Temporary Soil Nail Wall to Support Rehabilitation Efforts

Lower Crystal Springs Dam Improvement ProgramMonday, November 15, 2010

3:54 PM

SOHA Page 22
http://www.sf-planning.org/index.aspx?page=1829http://www.sf-planning.org/index.aspx?page=1829


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Excerpts from the Draft Environmental Impact Report for the Lower Crystal Springs Dam Improvements Project

Hetch Hetchy Reservoir System

Existing Lower Crystal Springs Dam


SOHA Page 23
http://sf-planning.org/ftp/files/mea/2006.0536E_LCSDI_DEIR.pdfhttp://sf-planning.org/ftp/files/mea/2006.0536E_LCSDI_DEIR.pdf


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LCSDIP : Soil Nail Wall Calculations with Preliminary DrawingsMonday, November 15, 2010

5:42 PM

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I was brought into the Marian Medical Center Project towards the beginning of construction phase, with the

responsibility to evaluate the existing plans for the shoring of the hospital starting at the basement level. This

my first true Construction Administration project, where I was evaluating the work of another engineerat the

construction phase, particularly to coordinate the boundaries, to verify with all other disciplines involved, to

complete the drawings and to finalize the engineering and construction documents and hand them over to the

contractors.

The contract engineer worked on the preliminary drawings and calculations. I then served as a communicatio

medium working between the general contractor and sub-contractors and the clients, finalizing a hand-over ofdocumentation to the clients. My accomplishments comprised of gathering the information from all of the spe

disciplines, matching building set points, cleaning up the drawings to match standards, verifying the calculation

correctness and for additional loading, to issue revisions, to investigate any interferences of both construction

mobilization and structural issues, and most importantly to verify with geotechnical engineers certain data per

to soil conditioning and consolidation, particularly with regards to high impact pressure points due to prestres

anchoring above the base footings. Nearing a first round completion, we were struck with a new Appendix J

component to OSHPD standards which required a complete revision of the Geotechnical calculations sets.

I finalized providing a new set of calcs after revising for the high impact loads,and upon finding certain further

shoring necessities.

The discussions proceeded with the contractors and the clients, and we put forth the final requirements such

the contractors would take the assignments with the client's interests at a preconstruction meeting in Santa M

The OSHPD Engineer of Record finalized the approval of the contract documents.

Clients : Catholic Healthcare West

Managing Engineers : URS Corporation

Architect of Record : Moon Mayoras Architects, Incorporated, San Diego, CA

Structural Engineer of Record :

Geotechnical Engineer of Record : Rutherford & Chekene, San Francisco, CA

Shoring Engineer of Record : SOHA Engineers

General Contractor : Kitchell Corporation

Marian Medical Center Excavation and Shoring PortionMonday, November 15, 2010

5:18 PM

SOHA Page 38


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Marian Medical CenterSanta Maria, CaliforniaThis 195,000 square foot 4-story replacement facility will relocate services from an antiquated1964 patient tower into a new innovative patient-centered care environment. This facility isdesigned to be contextual with the surrounding Santa Maria mission-style architecture and is

organized around a two-story public lobby zone, which will house a Gift Shop, InformationResource Center and multiple Public and Outpatient Waiting Areas for the entire medicalcenter.

The facility will consist of 167 beds and will provide the following services:Critical Care UnitTelemetry UnitIntermediate Neonatal Nursery Unit

Medical/Surgical UnitLabor/Delivery/Recovery/Postpartum UnitPediatric Unit

In addition, this project will also include the complete replacement of the existing CentralEnergy Plant.

Square Footage: 358,000

Project Cost: $110 MCompletion Date: Dec 2012Location: Santa Maria, California

Pasted from

SOHA Page 39
http://www.moonmayoras.com/GeneralAcuteCareFacilities.html#marianhttp://www.moonmayoras.com/GeneralAcuteCareFacilities.html#marianhttp://www.moonmayoras.com/GeneralAcuteCareFacilities.html#marian


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Projects

CCSF North Beach Campus Temporary Soil Nail Wall : See Description Below

SFPUC525 Golden Gate Avenue Building : Cladding, Diaphragm, and Internal Frame components including elevator well

See Description Below

Lake Merced Buttress wall : See Description Next Tab

St. Mary's Garage Underpinning and Pre-construction investigation of cracks. : See Description Below

Mercy Housing, Construction As-Built Documentation assembly. : Adjust drawings with all RFI information for final archi

166th Avenue at Hannah and Cull Canyon : Drilled Pier Retaining Walls for landslide decay.

Galileo High School Bleacher's Temporary Support for Rehabilitation work. : Site field decay identification, timber shori

Parkside Branch Library : Shear Wall and roof design calculations for extension to library.

Pt. Reyes Fireside barn : Wind Evaluations at Fireside barn for positionings on embankment.

Prada Showroom Renovation Shoring : Pipe Column Shoring for stabilizing showroom floor construction.

Other Projects at SOHA EngineersMonday, November 15, 2010

5:41 PM

SOHA Page 40


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http://forum.skyscraperpage.com/showthread.php?t=159669

I designed shoring using soil nails for a temporary excavation . The

excavation sequence next to a high-rise building was performed in two

steps. First a set of steel piles were drilled in next to the existing building,

while in the meantime, the excavation was established top-down to begin

a first phase excavation. Subsequently this first phase soil nail wall would

be completely removed to continue the excavation up to the drilled piles.

The below description describes Treadwell & Rollo's team of engineers

whom we worked with on the Shoring Project for the CCSF

Chinatown/North Beach Campus excavation.

CCSF North Beach Campus Temporary Soil Nail Wall DescriptionSFPUC 525 Golden Gate Avenue Building

Deemed the world's Greenest Building.

My tasks involved cladding design, intern

elevator framing, and photovoltaic pane

framing supports including seismic and

gravity analysis.

Further description

St. Mary's Garage Underpinning and

Preconstruction Investigation

A "new building" zon

requiring underpinnin

the existing buildings

demonstrated walls,

zone is within the

demarcation lines of

walls. The walls were

investigated for all ex

cracks prior to any wo

involvement as a part

pre-construction litig

prceedings.

SOHA Page 41
http://forum.skyscraperpage.com/showthread.php?t=159669http://forum.skyscraperpage.com/showthread.php?t=159669


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Overlapping Secant Soil Cement Piles with Embedded Wide Flange Internal Soil Buttress Wall

For the Lake Merced Pump Station Redesign, a complete geotechnical soil improvement program w

implemented around the entire premise due to vast quantities of liquefiable soil. Prior to soil

improvements, the region is susceptible to liquefaction, and thus the entire support system of the mbuilding could heave into Lake Merced with a seismic event. This soil cement buttress wall provides

stability to the main portion of highly susceptible liquefiable soil in the region, and particularly focuse

the zone surrounding the Lake to Pump Station exchange piping system.

The secant piles are overlocking zones of soil-cement grout with embedded steel piles. The entire s

cement grout zone serves as a barrier to water and soil flow, thus partially preventing entrance hydr

flow of ground water into the region, as well as preventing soil movement. Further soil improvemen

conducted by the geotechnical modifications have provided for further densification. Pretensioned

Deadmen with high strength tensioning bars tying into a concrete cap beam are utilized to restrain th

foot depth of shoring soil lateral earth pressures considering the portion of soil at the lake banksubmerges.

My main tasks involved the engineering design for the buttress wall, on-site measurements, client

coordination meeting attendance and scheduling, and CAD drafting with CAD management.

Lake Merced Pump Station Installation of Secant PilesWednesday, November 17, 2010

2:35 AM

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