Waste concrete pipeline penetration drilling pile construction process

A technology of discarded concrete and construction technology, applied in sheet pile walls, foundation structure engineering, construction, etc., to achieve high mechanization, prevent hole channeling, and good economical effect

Inactive Publication Date: 2018-12-18
CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common way to deal with abandoned pipelines in the construction of bored piles is the open cut method, but when encountering pipelines that are buried deep and do not have the conditions for excavation treatment, there is currently no good solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0045] 1. Design situation

[0046] The main foundation pit of the station has a total length of 155 meters. The foundation pit is supported by bored piles with a diameter of 1.2 meters @ 1.5 meters. The concrete pipeline is buried as deep as 9 meters (the depth of the pipe bottom). The pipeline construction method is the direct burial method. The overlying soil on the pipeline is mainly miscellaneous fill soil. The excavation method is risky and costly. It is finally decided to use various construction machinery such as rotary drilling rigs, punching drilling rigs, and hydraulic vibratory hammers to cooperate with construction methods to crush waste concrete pipes, effectively solving technical problems, and making a summary Form this process.

[0047] 2. Construction of bored piles crossing abandoned concrete pipes

[0048] (1) steel casing installation

[0049] The overlying soil above the abandoned concrete pipe is mainly miscellaneous fill. During the process of breaki...

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PUM

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Abstract

The invention discloses a waste concrete pipeline penetration drilling pile construction process. According to the construction process, the extended steel casing protection is adopted, a percussion drill and a rotary drilling rig are cooperatively used for processing an underground waste concrete pipeline with larger burial depth, and the drilling pile construction obstacles are removed, so thatthe construction process has the effects that (1) the extended steel casing protection is adopted, so that the problem of hole collapse of a surface miscellaneous filling soil layer and a disturbed soil layer during the construction process can be solved; (2) the percussion drill is used for impacting and processing the waste concrete pipeline with larger burial depth, so that the problem that a narrow field has no excavation condition or the excavation processing safety risk is high due to the complicated surrounding environment is solved; and (3) from the economy point of view, by adopting the extended steel casing protection and cooperatively using the percussion drill and the rotary drilling rig for processing the underground waste concrete pipeline with larger burial depth, compared with an excavation method, the processing period can be saved by 50 percent to 60 percent, and the cost can be saved by 20 percent to 30 percent, so that the economical efficiency is good. According tothe process, the manpower and the labor time are reduced, the forceful guarantee is provided for fitting to the project progress, and the utility tool is simple in structure and easy to implement.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction technology of bored piles passing through waste concrete pipelines. Background technique [0002] Due to the intricate underground pipelines in the urban foundation pit construction zone, there are many cases of abandoned pipelines after pipeline relocation during the construction of foundation pit protection bored piles in urban construction projects. At present, the common way to deal with abandoned pipelines in the construction of bored piles is the open cut method, but there is still no good solution for pipelines that are buried deep and do not have the conditions for excavation. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a construction process of bored piles passing through waste concrete pipes, which ensures the construction quality of bored piles passing through waste con...

Claims

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Application Information

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IPC IPC(8): E02D7/26E02D7/28E02D9/02
CPCE02D7/26E02D7/28E02D9/02
Inventor 刘辉帅少平张瑞泽孙辉巨新峰叶明文石可可谭青松
Owner CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD
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