Old foundation treatment construction method for underground diaphragm wall

A technology of underground diaphragm wall and construction method, which is applied in the direction of foundation structure engineering, sheet pile wall, building, etc., can solve the problems of high cost, etc., and achieve the effects of guaranteed construction progress, significant safety benefits, and guaranteed construction quality

Active Publication Date: 2021-05-28
中煤江南建设发展集团有限公司
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Problems solved by technology

This method costs too much and is rarely used in domestic engineering projects

Method used

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  • Old foundation treatment construction method for underground diaphragm wall

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Embodiment 1

[0026] Example 1: The bottom layer within the site range from top to bottom is composed of artificial fill, alluvial silty clay and medium sand, and the lower bedrock is composed of Devonian siltstone. The groundwater types of the site are Quaternary pore water and siltstone fissure water, and Quaternary pore water is the main one. During the investigation period, the buried depth of the borehole stable water level is 2.50-3.30m.

[0027] Such as figure 1 As shown, this embodiment provides a construction method for treating old foundations of underground diaphragm walls, including the following steps:

[0028] S1, Excavation of guide wall trenches. Excavate the guide wall trenches before the construction of the guide wall, and partially loosen the excavation width at the positions where the old foundation is exposed by excavation, so that the pile heads of the old foundation are completely exposed;

[0029] S2, guide wall construction, after the guide wall trench is excavate...

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Abstract

The invention provides an old foundation treatment construction method for an underground diaphragm wall. The method comprises the following steps that S1, a guide wall groove is excavated; S2, a guide wall is constructed, wherein after the guide wall groove is excavated and an old foundation is ascertained, the excavation width of the guide wall groove is expanded according to the position of the old foundation, then a groove bottom cushion layer and guide wall steel bars are subjected to binding construction, the guide wall steel bars are bound according to the expansion of the groove, and after that, single-side formwork erection and guide wall concrete pouring construction are conducted; S3, old foundation impact treatment is conducted, wherein after the guide wall maintenance reaches the age, the old foundation in a groove section is subjected to impact crushing; S4, grooving construction is performed, wherein grooving construction is conducted after old foundation impact treatment is completed; S5, reinforcing meshes are manufactured and installed; and S6, the groove section is poured. According to the method, the material waste in the construction process and the later bulge treatment difficulty are reduced at the same time, the diaphragm wall construction quality is guaranteed, and the economic, quality and safety benefits of implementation and application are remarkable.

Description

technical field [0001] The invention relates to the technical field of underground wall construction, in particular to a construction method for treating old foundations of an underground continuous wall. Background technique [0002] With the increasing shortage of urban construction land and the development of urban modernization, there is a huge impetus and pressure on the construction of new cities within the city. In order to meet the needs of urban planning, high-rise buildings develop rapidly in urban construction. However, some old urban areas in the city often have problems such as aging and sinking houses, narrow and congested roads, defective functional planning, backward public facilities, and serious environmental pollution. Therefore, the reconstruction of the old city of the city has become a key issue at present. In recent years, the process of urban renewal has been carried out in various places in my country, and more and more old towns, factories, and bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/18
CPCE02D5/18
Inventor 张四善王双双暨雷庭
Owner 中煤江南建设发展集团有限公司
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