Method for carrying out opposite-pull construction on pipe ditch through steel jacket box

A steel-jacketed box and pipe trench technology, which is used in artificial islands, water conservancy projects, infrastructure projects, etc., can solve the problems of large excavation area, high manufacturing cost of concrete boxes, and large disturbance of the upper soil layer. , to achieve the effect of low construction cost, easy guarantee of construction period, and reduced risk of settlement and deformation

Active Publication Date: 2018-12-18
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP OF THE FIFTH ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the traditional comprehensive pipe trench construction method, for example, there are defects in the excavation method in stages, such as large excavation volume, more auxiliary equipment and equipment, and a large area occupied by the excavation of the work site; in the method of jacking concrete boxes, there are defects The disturbance of the upper soil layer is relatively large, it is easy to cause the settlement and deformation of the building on the bottom surface, the manufacturing cost of the concrete box is high, and the construction period is long. The box-to-box jacking and concealed construction pipe ditch operation has the effects of short construction time, low construction cost, ecological environmental protection, small safety risk, and good construction quality

Method used

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  • Method for carrying out opposite-pull construction on pipe ditch through steel jacket box

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Experimental program
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Effect test

Embodiment 1

[0053] A method for constructing pipe trenches by pulling steel casings against each other, such as figure 1 shown, including the following steps:

[0054] Step A. In the excavation work, use the cable hole PE pipe method in the coarse hole to make the cable hole and lead through the pair of cables;

[0055] Step B. Install the steel box pull system;

[0056] Step C. The pair of steel casings is pulled into the hole;

[0057] Step D. Concrete construction inside the steel casing.

[0058] The invention adopts non-excavation directional drilling machine to carry out long-distance drilling, and adopts the cable hole construction method of "cloth cable hole PE pipe in the thick hole" to compensate the drilling error, and uses the positioning cable to locate the cable hole PE pipe; The casing is used as a support, and the jack in the continuous pulling system is used to pull the two-way steel casing and cover it across the section. After the steel casing is penetrated, it is pl...

Embodiment 2

[0060] This embodiment is further optimized on the basis of Embodiment 1, and the step A includes the following steps:

[0061] Step A1. Place and fix the steel hoop on the end face of the hole, carry out cable hole position measurement and setting out, and drill hole measurement control point layout, and use a horizontal directional drilling machine with a guiding accuracy greater than 150mm to drill rough holes and expand the rough holes in turn To 30cm aperture and 40cm aperture, clean the hole after reaming;

[0062] Step A2. The horizontal directional drilling rig drags the cable hole PE pipe into the coarse hole and installs the tension beam and the tension seat on the steel hoops at both ends of the coarse hole. First stretch the upper two positioning cables, and then stretch the lower two positioning cables to locate the PE pipe in the cable hole;

[0063] Step A3. Pour cement soil slurry mixed with retarder in the area between the cable hole PE pipe and the coarse ho...

Embodiment 3

[0093] This embodiment is further optimized on the basis of embodiment 1 or embodiment 2. The present invention also includes step Z of pre-reinforcing and excavating around the working well before step A, and step Z includes the following steps :

[0094] Step Z1. Arrange 10 restraint piles with a pile diameter of 1.5m×2m around the excavation area of ​​the working shaft and pour concrete. The restraint pile layout method is to arrange 3 restraint piles on both sides parallel to the axis of the pipe trench, and vertical to the axis of the pipe trench. Two restraint piles are arranged on both sides of the direction; the construction of the ring beam at the top of the working well is carried out after the concrete strength of the restraint pile reaches the standard; the excavation of the working well is carried out after the strength of the ring beam at the top reaches the standard;

[0095] Step Z2. The internal dimensions of the excavated working well are 8m in length, 8m in ...

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Abstract

The invention discloses a method for carrying out opposite-pull construction on a pipe ditch through a steel jacket box. Hidden penetration construction of the pipe ditch is completed through the method that an opposite-pull rope and an opposite-pull system cooperate to carrying out opposite-pull jacking on the steel jacket box and then soil is excavated. The method comprises the following steps that A, the opposite-pull rope is lead after a rope hole is formed through a method of arranging a rope hole PE pipe in a coarse hole during headwork; B, the opposite-pull system of the steel jacket box is mounted; C, the steel jacket box enters a hole in an opposite-pull manner; and D, concrete construction in the steel jacket box is carried out. Compared with a traditional pipe ditch constructionmethod, pipe ditch ground construction is carried out by adopting the method for carrying out opposite-pull hidden penetration on the pipe ditch through the steel jacket box, and the method has the advantages of being low in construction cost, ecological, environment-friendly and small in safety rick and not influencing ground facilities are achieved.

Description

technical field [0001] The invention relates to the technical field of tunnel and underground engineering construction, in particular to a method for constructing pipe trenches by pulling steel casings against each other. Background technique [0002] Urban comprehensive pipe ditch, also known as common ditch, is a municipal public tunnel space built underground in the city, and municipal public pipelines such as power, communication, and water supply are laid in a structure according to planning requirements, and unified planning, design, and construction are implemented. and management. Comprehensive pipe trench is the inevitable result of urbanization and high economic development, a means of comprehensive utilization of urban underground space, and an important infrastructure to ensure the sustainable development of cities. The construction of comprehensive pipe trenches has become the trend and trend of urban infrastructure modernization and renovation and urban modern...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/045
CPCE02D29/10
Inventor 徐少平
Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP OF THE FIFTH ENG
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