Shallow layer foundation pit dewatering construction method for water-rich pebble bed

A construction method and pebble layer technology are applied in the field of shallow foundation pit dewatering construction, which can solve the problems of water seepage, high water permeability, affecting the construction process, affecting the construction progress, etc., so as to improve drainage efficiency, improve precipitation efficiency and improve drainage. The effect of efficiency

Active Publication Date: 2020-07-14
中建七局第一建筑有限公司
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Problems solved by technology

[0002] With the rapid development of my country's construction industry, the scale of construction continues to expand, and the geological conditions involved are becoming more diverse. Due to the particularity of the geographical environment in the area of ​​rivers and their tributaries, the geological layers mostly form a structure of silt layer, pebble layer and mudstone layer from top to bottom. The large porosity of the pebble layer leads to its high water seepage and water permeability. , and the groundwater near the river is relatively rich, and the groundwater is more likely to enter the foundation pit through the pebble layer during the construction process, which increases the workload of foundation pit dewatering, further affects the construction progress, and increases the related costs in the construction; at the same time, the pebble layer The overall stability is low, and it is more likely to collapse during the construction of the foundation pit, which affects the construction process and also poses a greater safety hazard
[0003] In the existing technology, in the precipitation of foundation pits in water-rich pebble layers, in order to enhance the precipitation effect, the method of intensively drilling holes around the foundation pit is often used. This method can improve the precipitation effect to a certain extent, but the intensive drilling method is in the While increasing the cost, it will also cause certain damage to the stabi

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  • Shallow layer foundation pit dewatering construction method for water-rich pebble bed
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[0051] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0052] The specific embodiment of the present invention for the construction method of the shallow foundation pit dewatering of the water-rich pebble layer 11, such as Figure 1-3 shown:

[0053] The construction method for shallow foundation pit dewatering for the water-rich pebble layer 11, the specific construction steps are as follows:

[0054] S1. Preparing for the construction of the dewatering well. According to the actual con...

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Abstract

The invention provides a shallow layer foundation pit dewatering construction method for a water-rich pebble bed, and relates to the field of dewatering of a water-rich pebble bed foundation pit. Theshallow layer foundation pit dewatering construction method comprises the following steps that S1, dewatering well construction is prepared; S2, drilling is carried out, and a drilling machine takes place to drill at a preset dewatering well position and lower a well pipe; S3, a PVC pipe is installed in the well pipe; S4, drilling and slip casting are carried out on side pebble bed of a foundationpit; S5, the grouting effect in the pebble bed is detected; and S6, the dewatering work is started. According to the shallow layer foundation pit dewatering construction method, an anti-seepage curtain is formed between two dewatering wells to dredge underground water into the dewatering radii of the dewatering wells, the shallow layer foundation pit dewatering construction method has the advantages of good dewatering effect and high dewatering efficiency, meanwhile, the construction cost is saved, and the construction cycle is shortened.

Description

technical field [0001] The invention relates to a construction method for dewatering a shallow foundation pit in a water-rich pebble layer. Background technique [0002] With the rapid development of my country's construction industry, the scale of construction continues to expand, and the geological conditions involved are becoming more diverse. At the same time, as people's requirements for the living environment gradually increase, residential buildings near rivers, rivers and their tributaries gradually rise. Due to the particularity of the geographical environment in the area of ​​rivers and their tributaries, the geological layers mostly form a structure of silt layer, pebble layer and mudstone layer from top to bottom. The large porosity of the pebble layer leads to its high water seepage and permeability. , and the groundwater near the river is relatively abundant, the groundwater is more likely to enter the foundation pit through the pebble layer during the constructi...

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Application Information

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IPC IPC(8): E02D19/06E02D19/10E02D19/16
CPCE02D19/06E02D19/10E02D19/16
Inventor 徐洪瑞刘楠楠孟令举曹维存寇小勇王俊锋曹秀玲孙辉马原宋磊于猛
Owner 中建七局第一建筑有限公司
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