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Deep and narrow foundation pit excavating construction draining method

A technology for deep and narrow foundations and foundation pits, which is used in infrastructure engineering, construction, etc., can solve problems such as inability of construction equipment to enter the site, low drainage efficiency, and impact on construction progress, so as to achieve efficient and high-quality drainage operations and ensure orderly progress. , the effect of improving drainage efficiency

Inactive Publication Date: 2019-08-30
CHINA GEZHOUBA GRP FIRST ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When excavating a dam foundation pit containing a clayey silt layer, due to the low bearing capacity of the clayey silt silt, weak deformation resistance, and poor permeability, water seepage from the dam body and rainwater accumulation in the foundation pit will cause Subsequent construction equipment cannot enter the site, and the accumulated water is difficult to discharge;
[0006] Existing foundation pit drainage only relies on a set of pumping and drainage pumping station that descends with the construction excavation surface, and the drainage efficiency is low, which seriously affects the construction progress

Method used

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  • Deep and narrow foundation pit excavating construction draining method
  • Deep and narrow foundation pit excavating construction draining method
  • Deep and narrow foundation pit excavating construction draining method

Examples

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Embodiment 1

[0039] Such as Figure 1-6 Among them, a deep and narrow foundation pit excavation construction drainage method, through the multi-stage pumping station and intercepting ditch, the drainage operation in the deep and narrow foundation pit excavation construction is carried out in two stages: initial drainage and regular drainage.

[0040] In a preferred scheme, the initial drainage stage specifically includes the following steps:

[0041] 1) After the upstream cofferdam 1 of the foundation pit 7 of the dam, the anti-seepage wall of the downstream cofferdam 2 and the curtain grouting of the river bed section are completed, a first-stage upstream pump is installed on the upstream of the foundation pit 7 close to the upstream cofferdam 1 Station 3, a first-level downstream pumping station 4 is set on the downstream of the foundation pit 7 and close to the downstream cofferdam 2;

[0042] 2) Start the first-level upstream pumping station 3 and the first-level downstream pumping st...

Embodiment 2

[0050] Such as Figure 4 , 5 Among them, on the basis of Example 1, the surface seepage water intercepted by the upstream intercepting ditch 13 and the downstream intercepting ditch 13' flows into the first upstream sump 9 and the first downstream sump 11 by itself, and passes through A pumping station associated with the first upstream sump 9 and the first downstream sump 11 discharges water from the upstream cofferdam 1 and the downstream cofferdam 2 .

Embodiment 3

[0052] Such as Figure 4 , 5 Among them, on the basis of Example 1, an upstream dewatering well 10 and a downstream dewatering well 12 are respectively arranged on the upper and lower gravel backfill areas of the foundation pit 7, and the accumulated water in the upstream dewatering well 10 and the downstream dewatering well 12 is discharged to In the first upstream sump 9 and in the first downstream sump 11 .

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Abstract

The invention discloses a deep and narrow foundation pit excavating construction draining method. A multistage pump station is cooperated with an intercepting drain to carry out draining operation ondeep and narrow foundation pit excavating construction through preliminary draining and regular draining stages. Through the manner, the foundation pit draining construction scheme is reasonably planned to improve the draining efficiency of ponding in a foundation pit and realize the purpose of avoiding influence of infiltration and damage of viscosus floury soil from ponding to the excavating construction efficiency.

Description

technical field [0001] The invention relates to the field of production and processing of silver products, in particular to a deep and narrow foundation pit excavation construction drainage method. Background technique [0002] The construction of modern concrete face rockfill dams abroad originated in the United States. Since the 54m-high Movena Dam was built at the end of the 19th century, it has a development history of more than 100 years. The construction of modern concrete face rockfill dams in my country began in the mid-1980s and developed rapidly throughout the country. In the 1960s, with the advancement of dam-building technology and large-scale earth-rock construction machinery, especially large-scale vibratory rollers The emergence of concrete face rockfill dams has significantly increased the density of rockfill, reduced deformation, reduced water seepage, and unrestricted construction seasons. Therefore, concrete face rockfill dams have been further developed an...

Claims

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Application Information

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IPC IPC(8): E02D19/04E02D19/08
CPCE02D19/04E02D19/08
Inventor 朱永国李家富杨吉学张旭严波罗磊马俊石岩林陶傲旭夏淼
Owner CHINA GEZHOUBA GRP FIRST ENG CO LTD
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