Migration-free foundation-pit-crossing underground pipeline construction method

Abstract

The invention provides a construction method for underground pipelines spanning foundation pits without modification and relocation, comprising the following steps: a. Excavating the soil on both sides of the pipeline to form underground grooves; The first steel cage and the second steel cage that protect and support the outside of the pipeline; c. lift the first steel cage and the second steel cage at the same time and place them in the underground grooves on both sides of the pipeline; d. Translate the first reinforcement cage and the second reinforcement cage in the same direction to make the first reinforcement cage and the second reinforcement cage contact; space; f. Pour concrete into the first reinforcement cage and the second reinforcement cage respectively to form the first wall width and the second wall width; g. After recycling the sand bags, construct the first wall width and the second wall width External ground connection wall. The invention reasonably solves the problem of design and construction of the ground connecting wall enclosure structure under the working condition that the underground pipeline across the foundation pit is free from modification and relocation.

Description

technical field [0001] The invention belongs to the field of deep foundation pit engineering such as rail transit engineering, housing construction engineering, port and wharf, and in particular relates to a construction method for avoiding alteration and relocation of underground pipelines across foundation pits. Background technique [0002] Before the design and construction of the foundation pit project, all the underground pipelines within the scope of the foundation pit are temporarily or permanently relocated, and they are relocated outside the scope of the foundation pit. With the continuous development of urban construction, the problem of urban pipelines has become increasingly prominent. Especially for some important pipelines such as underground high-voltage lines and gas pipelines, it is very difficult to relocate. The high cost and long cycle have become very important factors to control project investment and construction cycle. However, some important pipelin...

AI Technical Summary

Problems solved by technology

Especially for some important pipelines such as underground high-voltage lines and gas pipelines, it is very difficult to relocate, and the high cost and long cycle have become very important factors to control project investment and construction cycle

However, some important pipelines such as underground high-voltage lines and gas pipes in urban pipelines cannot be relocated and span the construction area. How to quickly and effectively construct the ground wall enclosure structure without relocating the pipelines, and at the same time ensure the construction of the foundation pit In-process safety has always been a challenge in existing technologies

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