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Date : 1st of November of 2008
--------------------------Han, Min-ho - CEO & PresidentKun Yang Construction & Engineering Company, Limited
Kun Yang C&E Co., LTD : Room No. 308, Gold Tower, 386, Mannyeon-dong, Seo-gu, Daejeon, Korea
Obtained Inno-Biz Certification
Designated as a Venture Business
Authorized as a Research Institute
Obtained ISO9001 / ISO14001 Certification
Obtained Certificate Quality Innovation Excellent Company
Obtained A Certificate of Business Transparency
Awarded in 2002/2003 Korea Patented Technology Contest
Selected as Good Technology of Small and Medium Enterprise
Innovation Contest
Tel: +82-42-472-0546
Fax: +82-42-472-0549
http:///www.kyce.co.kr
Email: [email protected]
CONTENTS
1. Outline of Semi-shield method & Micro-shield / Micro-tunnelling
2. Characteristics of Semi-shield method & Micro-shield / Micro-tunnelling3. Types of Semi-shield method & Micro-shield / Micro-tunnelling
3-1. Mud-injection earth pressure balance type
3-2. Water-injection earth pressure balance type
4. Construction Work Procedure of Semi-shield method & Micro-shield / Micro-tunnelling
5. Outline of HDD method
6. Characteristics of HDD method
7. Construction Work Procedure of HDD method
8. Construction Case (Micro-shield / Micro-tunnelling)
조 직 도
Semi-shield method is to minimize noise, dust, the ground subsidence, traffic difficulties and others caused by the existing open-excavation method for making sure of safety of civil infrastructure and support facilities such as upper sewerage, electricity, communication, gas pipe, airport, train and so on.
Early in development, open-shield manpower excavation method had been used but, to apply for the soft ground and an increase of sill’s construction and to cope with difficult construction work, mechanical excavation method has been developed and improved so that the semi-shield method of a Mud-injection earth pressure balance type has been widely supplied.
The semi-shield method of a Water-injection earth pressure balance type also has recently been used because of demerits of Mud-injection earth pressure balance type which were expensive costs of PLANT facility and work space for separating injected mud-water and soil.
1. Outline of Semi-shield & Micro-shield/Micro-tunnelling
(Micro-shield/Micro-tunnelling are also the same methods as that of Semi-shield.)
2. Characteristics of Semi-shield method & Micro-shield/Micro-tunnelling
Long distance propulsion can be applied without equipments of middle bases. Problems with the press of a propulsion pipe created in composite soil can be solved by automatic injection equipment of lublicator for soil. Construction work of long distance and tunnel curve can be precisely carried out with automatic measurement equipment. Minimize the ground displacement Minimize traffic difficulties and environmental damage Applicable to various kinds of soil Construction period can be shortened with high propulsion speed. Relatively small sizes of starting work shaft and arrival work shaft
(Micro-shield/Micro-tunnelling are also the same methods as that of Semi-shield.)
조 직 도3. Types of Semi-shield method & Micro-shield/Micro-tunnelling
Reinforcement support wall is constructed in front of shield machine and then by injecting Mud-water into the blind end sealed up and pressing it, it can be rapidly moved to soil discharge device with seeking safety of the blind end, moved out to the ground through a pipe together with the soil excavated by a rotating cutter. PLANT on the ground separates injected mud-water from the soil, and separated mud-water is reused for construction work while the soil is discharged.
3-1. Mud-injection earth pressure balance type3-1. Mud-injection earth pressure balance type
(Micro-shield/Micro-tunnelling are also the same methods as that of Semi-shield.)
조 직 도Types of Semi-shield method & Micro-shield/Micro-tunnelling
This method is to propel shield with keeping a safety blind end by using the soil which was cut with a rotating cutter device depending on propulsion of shield and moved into cutter chamber. Only a moderate quantity of soil is discharged continually both through the machinery for soil discharge of screw type installed in cutting chamber and through machinery for soil discharge, such as slide gate or rotary feeder and others installed in shaft of just that machinery.
3-2. Water-injection earth pressure balance type3-2. Water-injection earth pressure balance type
(Micro-shield/Micro-tunnelling are also the same methods as that of Semi-shield.)
조 직 도4. Construction Work Procedure of Semi-shield method
& Micro-shield / Micro-tunnelling
Installation of starting work shaft
Construction of reinforcement support wall
Installation of a guide rail for propulsion
Setting the propulsion work shaft
Setting equipment and installation of a propulsion pipe
Taking out equipment
Linking propulsion pipe
Propulsion and Excavated soil discharge
Installation of arrival work shaft
Repeat
(Micro-shield/Micro-tunnelling are also the same methods as that of Semi-shield.)
조 직 도5. Outline of HDD method
As a kind of horizontal propulsion methods, this is the method of tunnelling through the ground surface-to-ground surface without vertical work shaft.
After fixing Bit on the end of pipe, the ground is punched and at this time, high pressure water is sprayed into the pipe. The service water used at this moment is to compound materials of bentonite or gel component.
조 직 도6. Characteristics of HDD method
Mainly used for establishing communication cable, electric power line
Short damage to the ground surface
Few civil petitions like traffic difficulties
Shortening construction period and being economical
조 직 도7. Construction Work Procedure of HDD method
Checking out buried underground materials in punching section
Preparing for equipment and construction materials
ShootingInput drill head-> Control jetting pressure-> Checking out
head position with deep locator-> Arrive at drill head target pit
Arrangement of construction site and withdrawal
ReamingRemove drill head-> Attach reamer
-> Fix Swivel pipe/cable with grip-> Control jetting pressure
CompletionStop Jetting-> Remove swivel and grip from Pipe-> Seal up the shift of pipe/cable with end cap
8. Construction Case (Micro-shield / Micro-tunnelling)
Installation of a guide rail for propulsion
Project D300. General soil L=50.0M
Installation of laser measurement machine for direction adjustment
Construction Case (Micro-shield / Micro-tunnelling)
Initial work of a propulsion leading machine
Project D300. General soil L=50.0M
Work of initial propulsion
Project D300. General soil L=50.0M
Join a propulsion leading pipe to a pipe
Construction Case (Micro-shield / Micro-tunnelling)
Propulsion after joining a propulsion leading pipe to a pipe
Project D300. General soil L=50.0M
Propulsion of a propulsion pipe
Construction Case (Micro-shield / Micro-tunnelling)
Propulsion of a propulsion pipe
Project D800. Soil contained gravel L=116.0M
Construction Case (Micro-shield / Micro-tunnelling)
Display propulsion conditions on monitor
Project D800. Soil contained gravel L=116.0M
Inject lublicator for soil
Construction Case (Micro-shield / Micro-tunnelling)
Arrival of a propulsion leading machine at the final base
Project D800. Soil contained gravel L=116.0M
Pull up a propulsion leading machine after separating from a propulsion pipe
Construction Case (Micro-shield / Micro-tunnelling)
Separate Auger in casing & take it out after finishing propulsion
Project D800. Soil contained gravel L=116.0M
Construction Case (Micro-shield / Micro-tunnelling)
Project D500. General soil L=60.0M
Propulsion of a propulsion pipe
Construction Case (Micro-shield / Micro-tunnelling)
Join a propulsion pipe
Project D500. General soil L=60.0M
Propulsion of a propulsion pipe
Construction Case (Micro-shield / Micro-tunnelling)
Arrival of a propulsion leading machine at the final base
Project D500. General soil L=60.0M
Pull up a propulsion leading machine after separating from a propulsion pipe
Construction Case (Micro-shield / Micro-tunnelling)
Project D500. General soil L=60.0M
Separate Auger in casing & take it out after finishing propulsion
Construction Case (Micro-shield / Micro-tunnelling)