Spiral-unearthing pipe-jacking pipe curtain construction method and device

Abstract

Provided are a spiral-unearthing pipe-jacking pipe curtain construction method and device. The method comprises the steps that the step 1, foundation pits and a site are prepared; the step 2, the spiral-unearthing pipe-jacking pipe curtain construction device and an electric welding machine are installed and debugged; the step 3, a common drill, a guide head, a stub, deviation correction oil cylinders, an initial-section spiral drill pipe, an initial-section outer sleeve and an initial-section pipe curtain steel pipe are installed on the spiral-unearthing pipe-jacking pipe curtain construction device; the step 4, a hole-entering angle is regulated; the step 5, drilling and jacking are conducted; the step 6, lengthening is conducted; the step 7, drilling, jacking and lengthening are circulated; the step 8, the common drill, the guide head, the stub and the deviation correction oil cylinders are dismounted at the position of the receiving foundation pit; the step 9, disassembly is circulated; the step 10, the spiral-unearthing pipe-jacking pipe curtain construction device is moved to a second hole, and the steps 3-10 are repeated; the step 11, in this way, construction of pipe curtain steel pipes of all other holes is finished. The method for combining spiral unearthing and oil cylinder jacking is adopted, disturbance in stratums is small, and construction accuracy is high.

Description

technical field [0001] The invention relates to a pipe curtain construction method used in tunnel advance support construction, and pipe curtain construction equipment used in the pipe curtain construction method. Background technique [0002] In the field of tunnel construction, methods such as pipe shed, pipe curtain, and horizontal rotary grouting are often used to support the stratum in advance before tunnel excavation. The pipe-curtain method is a construction technique for constructing a large-section underground space by densely arranging relatively large-diameter steel pipes underground in advance to form a curtain. It is a new type of underground excavation technology. The principle of the pipe curtain method is based on the laying of a single steel pipe, and the steel pipes are connected by locks, and a water-stopping agent is injected into the locks to form a sealed water-stop curtain. At present, the pipe screen construction mainly includes the pipe extrusion me...

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Problems solved by technology

[0003] The object of the present invention is to provide a pipe curtain construction method and equipment for spiral excavation pipe jacking, to solve the technical problems of large ground disturbance and low construction precision in the traditional pipe curtain construction method, and the serious mud pollution of the traditional pipe curtain construction method. Costly technical issues

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