Pipe-jacking type cable sleeve passage construction method
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A technology of cable casing and construction method, which is applied in the direction of cable laying equipment, tunnels, tunnel linings, etc., can solve the problems of long distance between stations and substations, difficulty in implementation, and many obstacles, so as to speed up the construction progress, reduce the cost, and The effect of ensuring stability
Active Publication Date: 2014-04-09
ZHONGYIFENG CONSTR GRP
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[0003] The cable supplies the power from the substation to the station through a dedicated channel, but the distance between the station and the substation is often long, and there are often many ground obstacles on the way. Obstacles to demolition, difficult to implement
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Embodiment 1
[0027] Embodiment 1: A construction method for a jacking type cable casing channel, including the steps of caisson construction for a terminal cable well, pipe jacking construction, pipe arrangement construction, concrete pouring, and cable threading.
[0028] 1. Caisson construction of terminal cable well
[0029] The caisson process flow is as follows: preparatory work → removal of brick tire formwork and plain concrete cushion → chiseling → soil extraction and sinking → sinking speed control → caisson correction → caisson bottom sealing and floor concrete pouring.
[0030] The following points should be paid attention to during the process:
[0031] groundwater control
[0032] If the cable shaft encounters a silt layer during the sinking process, in order to prevent sand from escaping, the surrounding area of the caisson can be isolated by stirring piles, a multi-axis machine can be used, or a jetting pile can be used to form a water-stop curtain, and a tube well can be...
Embodiment 2
[0081] The power of a subway station station is introduced from the main station on the west side, with a total length of about 1,150 meters. The surrounding environment of the section of more than 200 meters is relatively complicated, and it needs to pass through canals, gravel yards, and oil depots.
[0082] Due to the impossibility of excavation in this section, relatively economical medium-diameter pipe jacking (1.8m inner diameter) was adopted for construction. The bottom elevation of the pipeline in the pipe jacking area of this project is -8.3m~-6.0m, and the buried depth is about 6.5m~10m. It mainly passes through the silt layer and silty clay layer. Mud water balance method.
[0083] Two cable wells are set at the end of the pipe jacking. The 7# working well is a round well with a diameter of 8.5m and a depth of 10.5m; the 9# receiving well is a square well with a plane size of 9.3m×6.3m and a depth of 8.0m. The water-stop curtain is constructed around the well wit...
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Abstract
The invention discloses a pipe-jacking type cable sleeve passage construction method including the steps of (1) open caisson construction of end cable wells, (2) pipe jacking construction, (3) pipe arranging construction, (4) concrete pouring construction and (5) threading construction. The step of open caisson construction of the end cable wells includes respectively arranging the end cable wells at two ends of an obstacle needed to be crossed and then constructing by an open caisson process; the step of pipe jacking construction includes jacking by a pipe jacking device from one end cable well to the other end cable well so as to build a pipe jacking passage communicating the two end cable wells; the step of pipe arranging construction includes arranging sleeves in the pipe jacking passage and separating and limiting the arranged sleeves through slab fasteners which are arranged in the pipe jacking passage and fixed with the wall thereof; the step of concrete pouring construction includes pouring concrete in various sleeves in the pipe jacking passage; the step of threading construction includes setting a pull rope in one end cable well and then pulling in the other end cable well through a pulling device, thereby realizing cable threading. The pipe-jacking type cable sleeve passage construction method is generally applicable to cable pipeline laying projects with ground obstacles, incapable of being removed or needing high removal cost.
Description
technical field [0001] The invention relates to a construction method for a pipeline passage, in particular to a construction method for an underground passage for a cable duct. Background technique [0002] At present, the whole country advocates green travel, rail transit has a large transportation volume and is green and environmentally friendly. Everywhere is constantly planning and building rail transit systems, especially underground rail transit systems. The power system is the blood of rail transit, and it is very important to ensure the safe laying and use of cables. [0003] The cable supplies the power from the substation to the station through a dedicated channel, but the distance between the station and the substation is often long, and there are often many ground obstacles on the way. The demolition of obstacles is difficult to implement. [0004] In order to solve the above problems, pass through the obstacles smoothly, and safely send the cables from the su...
Claims
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