Mildtype well point dewatering construction method of deep foundation pit of red sandstone stratum

A light-weight well point and construction method technology, applied in infrastructure engineering, construction, etc., can solve problems such as easy blockage of pipelines, hidden safety hazards, and reduced precipitation effect, so as to achieve less construction supporting equipment, improve precipitation effect, and reduce precipitation effect obvious effect

Inactive Publication Date: 2018-05-01
CHINA RAILWAY 21ST BUREAU GRP TRACK TRAFFIC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The traditional foundation pit dewatering method has the problems of reduced dewatering effect and high cost in the construction of deep foundation pits in red sandstone formations. The water content of impurities or sand in red sandstone formations is high in cost, and sediments are easy to block pipelines, and sediments cause pipeline wear , sediment loss can also easily cause foundation subsidence
There are security risks

Method used

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  • Mildtype well point dewatering construction method of deep foundation pit of red sandstone stratum
  • Mildtype well point dewatering construction method of deep foundation pit of red sandstone stratum
  • Mildtype well point dewatering construction method of deep foundation pit of red sandstone stratum

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Embodiment Construction

[0030] A light well point dewatering construction method for deep foundation pits in red sandstone formations, comprising the following steps:

[0031] A. Foundation pit excavation

[0032] Excavation of the foundation pit shall stop at 2m from the base;

[0033] B. Prefabricated well point materials

[0034] The light well point includes multiple sets of water collection pipes and point well pipes. There are 4-8 light well point joints on the water collection pipe. The light well point joints are connected with the point well pipes. wrapped gauze;

[0035] C. The first light well point construction

[0036] The steel pipe generates water pressure through the pump body, and the water outlet end of the steel pipe is a flat mouth shape, and the steel pipe sprays water to flush the red yarn rock into a well;

[0037] D. Quick insertion point well pipe

[0038] After flushing reaches the design depth, pull out the steel pipe and insert the point well pipe, and connect the poi...

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Abstract

The invention relates to the technical field of civil engineering construction, and in particular relates to a mildtype well point dewatering construction method of a deep foundation pit of a red sandstone stratum. The method is particularly suitable for dewatering construction in construction of a deep foundation pit support structure of the red sandstone stratum. By arranging single wells of different depths in the foundation pit in a step manner in depth, the depths and quantity of the single wells are determined according to displacement of the foundation pit. Compared with a conventionalconstruction process, the mildtype well point dewatering construction method has the advantages that the dewatering effect can obviously accelerate the construction progress, construction matched equipment is few and construction input is low. The hole forming time of a reinforcing steel bar pile in the process is only 40% of that of a conventional full sleeve construction process in similar conditions. The water stopping effect of the method can improve the dewatering effect by 95% or above through verification.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a light well point dewatering construction method for deep foundation pits in red sandstone formations. It is especially suitable for dewatering construction in the construction of deep foundation pit enclosure structure in red sandstone formation. Background technique [0002] The traditional foundation pit dewatering method has the problems of reduced dewatering effect and high cost in the construction of deep foundation pits in red sandstone formations. The content of impurities or sand in the water in red sandstone formations is high, and sediments are easy to block pipelines, and sediments cause pipeline wear , and sediment loss can easily cause foundation subsidence. There are security risks. Contents of the invention [0003] The invention solves the deficiencies of the prior art and provides a light well point dewatering construction method for deep foundati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/10
CPCE02D19/10
Inventor 康逢学薄志军李鹏辉郭健高升孟庆斌常汉明景文琪
Owner CHINA RAILWAY 21ST BUREAU GRP TRACK TRAFFIC ENG
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