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Method for reinforcing cast-in-place pile foundation in grouting manner

A cast-in-place pile and foundation technology, applied in the field of pile foundation, can solve problems such as long construction period, and achieve the effect of improving the bearing capacity of a single pile, reducing the amount of materials, and reducing the cost of the project

Inactive Publication Date: 2012-08-22
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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  • Abstract
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AI Technical Summary

Problems solved by technology

From the construction point of view, this method is convenient for construction, and the accuracy of foundation construction is not high, but the construction period is long. For reconstruction and expansion projects, it will cause two power outages successively

Method used

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Effect test

Embodiment

[0018] A grouting method for strengthening cast-in-place pile foundations. The method uses a pressure conduit to inject cement-cured slurry into the side or end surface of the cast-in-situ pile foundation to replace the mud skin on the pile side. The soil around the pile foundation is strengthened, that is, the reinforcement of the cast-in-place pile foundation is completed, and the sediment at the pile tip is solidified to improve the bearing capacity of the foundation pile. This technology is a new method that can increase the area of ​​the pile end without increasing the concrete volume of the pile body, and can make the pile end sit on the bearing layer with high end resistance without increasing the length of the pile.

[0019] When the soil is coarse-grained soil, the cement solidified slurry mainly fills and cements the pores of the soil particles through infiltration. When the soil is fine-grained cohesive soil, the cement solidification slurry is mainly used to reinfo...

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Abstract

The invention relates to a method for reinforcing a cast-in-place pile foundation in a grouting manner. A pressure conduit injects the mud cover on the cement solidification slurry replacement pile side to the side surface or end surface of the cast-in-place pile foundation; and the cement solidification slurry reinforces the soil bodies around the pile foundation through the effects of permeation solidification, mud cover cementation, filling compaction and cleavage reinforcement so as to finish the reinforcement of the cast-in-place pile foundation. Compared with the prior art, the method provided by the invention reinforces the soft soil bodies around the pile through the effects of permeation solidification, mud cover cementation, filling compaction, cleavage reinforcement and the like, improves the pile-soil interface conditions, enhances the bearing capacity of the cast-in-place pile, reduces settlement and material use of the foundation, shortens the construction period, and lowers the project cost; and after grouting, the load settlement graph of the cast-in-place pile tends to be flat, and the settlement is obviously reduced.

Description

technical field [0001] The invention relates to a pile foundation, in particular to a grouting method for reinforcing the cast-in-place pile foundation. Background technique [0002] There are two main types of transmission lines, overhead lines and underground cable lines. The overhead line itself has a small investment and a large transmission capacity. It has always been the main method of transmission lines, especially ultra-high voltage transmission lines. [0003] Transmission line towers are pole-shaped and tower-shaped structures that support overhead transmission line conductors and ground wires and keep a certain distance between them and the ground. Their safety and reliability are directly related to the safe operation of the entire transmission line. [0004] With the continuous development of the economy and society, the demand for electricity has increased year by year, and the construction and development of the national grid has been accelerated in an all-r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/64E02D3/12
Inventor 陶春凤顾俊颉余寅何晖房岭锋郑伟华
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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