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Excavation construction method for in-situ protection of long and narrow deep foundation pits for underground pipelines

A technology for underground pipelines and construction methods, applied in excavation, infrastructure engineering, construction, etc., can solve the problems of high cost, long construction period, complicated pipeline relocation, etc., to improve work efficiency, improve efficiency, and reduce relocation costs. Effect

Active Publication Date: 2021-02-26
CCFEB CIVIL ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above problems, the present invention provides an excavation construction method for in-situ protection of long and narrow deep foundation pits for underground pipelines, so as to solve the technical problems of complex pipeline relocation, long construction period and high cost during construction of long and narrow foundation pits

Method used

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  • Excavation construction method for in-situ protection of long and narrow deep foundation pits for underground pipelines
  • Excavation construction method for in-situ protection of long and narrow deep foundation pits for underground pipelines
  • Excavation construction method for in-situ protection of long and narrow deep foundation pits for underground pipelines

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Embodiment

[0030] For the excavation construction method of in-situ protection of long and narrow deep foundation pits for underground pipelines, please refer to figure 1 , figure 2 ,include:

[0031] Step 1. Measurement and stakeout

[0032] Measure and stake out according to the calculated width of the edge of the foundation pit;

[0033] Step 2. Pipeline inspection

[0034] Manually detect the pipelines within the scope of the foundation pit, and mark and protect the proven pipelines;

[0035] Step 3, foundation pit support

[0036] Steel sheet piles 2 are constructed on both sides of the pipeline 3 for enclosure; then the steel flower pipe 1 is obliquely driven into the bottom of the pipeline 3 at the gap between the steel sheet pile 2 and the pipeline 3 to complete the guide hole and buried pipe of the steel flower pipe 1, and then grouting construction, such as image 3 shown;

[0037] Step 4. Excavation of foundation pit soil

[0038] Excavation of foundation pit soil inc...

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Abstract

The invention discloses an excavation construction method for an underground pipeline in-situ protection narrow and long deep foundation pit. The excavation construction method includes the steps of stacking out in survey, pipeline searching, foundation pit supporting and foundation pit soil body excavation. The excavation construction method is characterized in that the step of foundation pit supporting includes that steel plate piles are constructed on the two sides of a pipeline for protecting; and then steel flower pipes are obliquely driven into the bottom of the pipeline at the positionsof the clearances between the steel plate piles and the pipeline, hole leading and pipe burying of the steel flower pipes are completed, and grouting construction is conducted afterwards; and the step of foundation pit soil body excavation includes pipeline part soil body excavation and steel plate pile part soil body excavation. By means of the construction method, the technical problems that during narrow and long foundation pit construction, pipeline moving and modifying are complex, the construction period is long, and the construction cost is high can be solved.

Description

technical field [0001] The invention belongs to the technical field of foundation pit construction, and in particular relates to an excavation construction method for in-situ protection of long and narrow deep foundation pits for underground pipelines. Background technique [0002] With the rapid development of various cities, the original overhead high-voltage power lines will gradually be cabled underground, and the construction of comprehensive pipe corridors will be carried out; due to the large number of pipelines under the urban arterial roads in the old urban areas, the buried depths are different and complicated, and there are a large number of hidden pipelines that are not indicated in the geophysical prospecting data , especially the secondary relocation of pipelines at intersections is difficult, the construction site is narrow and the construction period is long. There is no specific process report in the current research literature, and there has been no good sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/02E02D17/04
CPCE02D17/02E02D17/04
Inventor 陈燚彭丹罗文艺刘兴华谢爱荣
Owner CCFEB CIVIL ENG
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