Floodplain Management Association- 23nd Annual Fall Conference -
BI-LEVEL SOIL CEMENTAn Environmentally Superior Bank Protection System
BI-LEVEL SOIL CEMENTAn Environmentally Superior Bank Protection System
Presented by
PACIFIC ADVANCED CIVIL ENGINEERING
Problem:
SANTA CLARA RIVER BANK PROTECTION
Problem:
SANTA CLARA RIVER BANK PROTECTION
Issues:
1. Public outcry for different bank protection solution• Less invasive solution (less disturbance)• More usable solution (dry +90% of the time) (vs. Standard Concrete or Rip Rap Bank Protection)
Problem:
SANTA CLARA RIVER BANK PROTECTION
Issues:
1. Public outcry for different bank protection solution• Less invasive solution (less disturbance)• More usable solution (dry +90% of the time) (vs. Standard Concrete or Rip Rap Bank Protection)
2. Environmentally Sensitive Area• ACOE• CDFG (State)• USFWS (Federal Endangered Species)
Problem:
SANTA CLARA RIVER BANK PROTECTION
Issues:
1. Public outcry for different bank protection solution• Less invasive solution (less disturbance)• More usable solution (dry +90% of the time) (vs. Standard Concrete or Rip Rap Bank Protection)
2. Environmentally Sensitive Area• ACOE• CDFG (State)• USFWS (Federal Endangered Species)
3. Public Safety• Flood Control (Protection from Flood & Scour)• In and Around River & Bank Protecton
4. Cost Effective Flood Control Solution
5. Minimal Maintenance Solution
Solution:
BI-LEVEL SOIL CEMENT BANK PROTECTION• Buried and Revegetated
Problem:
SANTA CLARA RIVER BANK PROTECTION
Issues:
1. Public outcry for different bank protection solution• Less invasive solution (less disturbance)• More usable solution (dry +90% of the time) (vs. Standard Concrete or Rip Rap Bank Protection)
2. Environmentally Sensitive Area• ACOE• CDFG (State)• USFWS (Federal Endangered Species)
3. Public Safety• Flood Control (Protection from Flood & Scour)• In and Around River & Bank Protecton
4. Cost Effective Flood Control Solution
5. Minimal Maintenance Solution
Solution:
SOIL CEMENT BANK PROTECTION• Single Level – buried• Bi-Level - buried
Bi-Level Soil Cement Bank Protection - Typical Plan & Section at Residential AreaBi-Level Soil Cement Bank Protection - Typical Plan & Section at Residential AreaBi-Level Soil Cement Bank Protection - Typical Plan & Section at Residential Area
San Francisquito Creek –Existing Concrete Bank Protection
CAP FLOOD
100 YR
Concrete
8” to 10” thick
San Francisquito Creek –Existing Concrete Bank Protection
Map #17949 Rip Rap Bank Protection CASTAIC CREEK
CAP FLOOD
100 YR
Rip-Rap
36” to 54” thick
San Francisquito Creek –Existing Concrete Bank Protection
Map #17949 Rip Rap Bank Protection CASTAIC CREEK
Bank Protection Comparison
CAP FLOOD
100 YR
Concrete8” to 10” thick
Rip-Rap36” to 54” thick
Soil Cement50” to 72” thick
Map #17949 Rip Rap Bank Protection CASTAIC CREEK
San Francisquito Creek –Existing Concrete Bank Protection
Soil Cement Bank Protection at Bridgeport
BRIDGEPORT SOIL CEMENT BANK PROTECTION SUMMARYReach Length: 9,500 LFVolume of Soil Cement: 74,000 c.y. (or 7.8 c.y./LF)
DESIGN PARAMETERSFreeboard: Capital Flood Water Surface + 2 feet (LA County Standard)
(based on HEC-2 model, n=0.085) QCAP = 117,000 cfsToe-down: 10 feet below existing river invert (LA County Standard)
(based on HEC-2 model, n=0.025) VCAP = 12 to 15 fpsBANK PROTECTION
Typical height: Upper level: 10 feetLower level: 19 feet
Typical width: 8 feetSlope of bank protection: 1:1Horizontal distance between levels: ±40 feet
OVERBANK GRADE CONTROL STRUCTURETypical height: 7 feetSpacing between structures: 200-400 feet
SOIL CEMENT MIX DESIGNSoil Type (Unified Classification): SM/SPCement content: 8-11% (includes 2% for erosion)Moisture content: 10.5% (opt. Moisture + 1% for evaporation)7-day compressive strength: 750 psiCompaction requirements: 95% of max. dry density
•Soil•Cement•Water
•Mixing•Compaction
Stockpile Test LocationBridgeport – Valencia, CA
Soil Cement Mixing PlantBridgeport - Santa Clarita, CA
Batch Plant & Stockpile
Set up #1
Set up #2
Batch Plant & Stockpile
Excavation & De-wateringBridgeport - Santa Clarita, CA
Excavation & De-wateringBridgeport - Santa Clarita, CA
Excavation & De-wateringBridgeport - Santa Clarita, CA
Soil Cement Mixing PlantBridgeport - Santa Clarita, CA
Soil Cement PlacementBridgeport – Santa Clarita, CA
Soil Cement CompactionBridgeport – Santa Clarita, CA
Soil Cement PlacementBridgeport - Santa Clarita, CA
Bi-Level Soil Cement - San Francisquito CreekUpper & Lower level soil cement placement & compaction
Bi-Level Soil Cement - San Francisquito CreekPlacement of soil cement for upper & lower levels
Bi-Level Soil Cement at Overbank Grade Control StructureBridgeport - Santa Clarita, CA
Bi-Level Soil Cement at Overbank Grade Control StructureBridgeport - Santa Clarita, CA
Bi-Level Soil Cement - Santa Clara RiverCompleted upper, lower & overbank grade control structure
8 FT LIFTSSoil Cement
Storm Drain (72” diameter) Penetration at Soil CementMTD 1586 – South River Project at Santa Clara River
Santa Clara RiverSanta Clara River
San
Fran
cisq
uito
Cree
k
San
Fran
cisq
uito
Cree
k
BRIDGEPORTBRIDGEPORT
SOUTHRIVER
SOUTHRIVER
QC
AP:
37,4
00 C
FSV C
AP:
12-1
6 FP
S
QC
AP:
37,4
00 C
FSV C
AP:
12-1
6 FP
S
QCAP: 117,400 CFSVCAP: 13-18 FPSQCAP: 117,400 CFSVCAP: 13-18 FPS
NEWHALL RANCH RD.
NEWHALL RANCH RD.AVE. SCOTT
AVE. SCOTT
MCBE
AN P
KWY.
MCBE
AN P
KWY.
SOIL CEMENTBANK PROTECTION
SOIL CEMENTBANK PROTECTION
SOIL CEMENT BANK STABILIZATION PLANSOIL CEMENT BANK STABILIZATION PLAN
NN
Summary of the Advantages of Soil Cement Bank ProtectionSummary of the Advantages of Soil Cement Bank Protection
1. Safety! Improved public access in and out of river bank! Reduced flow depths & velocities at river edge by creating stabilized over bank area
2. Flood Protection & Durability! Soil Cement has proven tract record of providing sound flood protection! Massive homogeneous & monolithic structure
3. Environmental Sensitivity & Resource Conservation! 90% of material available on site, thus conserving resources & reducing the impact
to the environment." Use of offsite natural resources (rip-rap, steel, etc.)" Fuel consumption, vehicular pollution" Traffic congestion
! Reduced impact to the native habitat" Buried bank protection" Revegetation & setback from existing habitat" Soil Cement if exposed provides unobtrusive bank stabilization due to its native
color, texture & finish (appears as hardened native soils)" Reduced construction time & impacts
4. Cost Effective Solution! Savings of 30 to 50% over conventional concrete or rip-rap bank protection methods
CAP FLOOD W.S.
100-YEAR W.S.
PD #2509West Creek (VTTM #52455)
16’ WIDE DRAINAGE EASEMENT FOR PROPOSED PEDESTRIAN
TRAIL AND ACCESS ROAD
PROPOSED SOIL CEMENT BANK PROTECTION
LIMITS OF EXCAVATION FOR SOIL CEMENT
PROPOSED GRADE
DAYLIGHT LINE
20’ CONSTRUCTION
ACCESS
LIMIT OF CONSTRUCTION AND DISTURBANCE. OWNER TO
ERECT TEMPORARY FENCING.
EXISTING GRADE
S.A.
T
SETB
A CK
RESO
URC
E LI
NE
WEST CREEK DEVELOPMENT
1200
1180
1160
300400500
Typical Buried Soil Cement Bank Protection Cross SectionTypical Buried Soil Cement Bank Protection Cross Section
REVEGETATION ZONE
Exposed Soil CementBridgeport – Santa Clarita, CA
Exposed Soil CementBridgeport – Santa Clarita, CA
Compaction, Density, and TestingBridgeport – Santa Clarita, CA
Quality Control TestingIn Field Moisture/Density Test (cone or nuclear density meter)
(ASTM D 1632-87 & 1632-84 to prepare & test cylinders to determine compressive strength)
Quality Control TestingCollection of Soil Cement for Test Cylinder
(ASTM D 1632-87 & 1632-84 to prepare & test cylinders to determine compressive strength)
Quality Control TestingCompaction of Test Cylinder
(ASTM D 1632-87 & 1632-84 to prepare & test cylinders to determine compressive strength)
Quality Control TestingRemoval of Test Cylinder from Mold
(ASTM D 1632-87 & 1632-84 to prepare & test cylinders to determine compressive strength)
Westcreek Soil Cement Compressive Strength Test Data
200
0
400
600
800
1000
1200
1400
1600
414
499
625
334
652
833 812
1113
613
946
1235
1385
1521
1027
221207
376
732
830
Minimum Requirement 750 psi. @ 7-dayMinimum Requirement 750 psi. @ 7-day
(Project Stockpile vs. Final Averages)For Project Stockpile
436
Com
pres
sive
Str
engt
h (p
si)
Days1 3 7
44%
40%
41%69%
67% 59%
73%
6.5 % Cement Content 7.0 % Cement Content 7.5 % Cement Content 8.0 % Cement Content 9.0 % Cement Content
1 Day Strength = ±40% of 7 Day
3 Day Strength = ±70% of 7 Day
Excavation for Soil CementPlacement of Soil CementCompleted Soil Cement with Top ExposedCompletely Backfilled Soil CementRevegetation Complete with Maintenance Road & Trail over Soil Cement
Bridgeport Soil Cement Bank Protection Photo SequenceBridgeport Soil Cement Bank Protection Photo Sequence
BI-LEVEL SOIL CEMENTAn Environmentally Superior Bank Protection System
BI-LEVEL SOIL CEMENTAn Environmentally Superior Bank Protection System