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Construction method of water-rich red sandstone geological underground water level control

A technology of groundwater level control and construction method, applied in infrastructure engineering, construction and other directions, can solve problems such as the difficulty of groundwater level in red sandstone geology, and achieve the effects of reducing red sandstone disturbance, large operating surface, and improving precipitation efficiency

Inactive Publication Date: 2020-05-29
CHINA MCC17 GRP
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  • Abstract
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Problems solved by technology

Conventional mechanical earthwork layered excavation cannot achieve precipitation layering well, which brings great difficulties to the control of groundwater level in red sandstone geology

Method used

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  • Construction method of water-rich red sandstone geological underground water level control

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] like figure 1 As shown, a construction method for water-rich red sandstone geological groundwater level control, the steps are as follows:

[0021] Step 1. Confirmation and optimization of light well point dewatering scheme;

[0022] Step 2: Excavate in layers, install the first set of light well point dewatering equipment in the outermost circle, and control the groundwater level below 1 meter of the first excavation layer after commissioning;

[0023] Step 3: Excavate the foundation pit with large-scale machinery and equipment, manually assist the excavation and level the bottom of the foundation pit;

[0024] Step 4: Install a second set of light well point dewatering equipment close to the outer ring of the current foundation pit bottom, and control the groundwater level below 1 meter of the second excavation layer after the commissioning is completed;

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Abstract

The invention discloses a construction method of water-rich red sandstone geological underground water level control. According to the construction method of water-rich red sandstone geological underground water level control, layered excavation is adopted, a set of independent light well point dewatering equipment is arranged on the layer before each layer is excavated, and before the next layeris excavated, the water level of the water-rich red sandstone soil layer is lowered to below 1 meter of the excavated layer through the light well point dewatering equipment on the layer; and the steps are repeated till a foundation pit is excavated to 0.5 m above the designed elevation of a pit bottom, manual excavation is adopted, and the foundation pit is excavated manually to the designed elevation and leveled. According to the construction method, the underground water level of the red sandstone-rich construction area can be effectively controlled, the red sandstone is prevented from being disturbed by the disturbance intensity when encountering water, and meanwhile the construction efficiency is improved.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a construction method for controlling the geological groundwater level of water-rich red sandstone. Background technique [0002] In areas along the Yellow River such as Lanzhou in western my country, there are Tertiary water-rich semi-red sandstones in the formations, referred to as red sandstones. This kind of sandstone has relatively large water content, special engineering properties, poor hydraulic properties, softens when exposed to water, easily disintegrates, and its strength decreases sharply after being disturbed. However, the rich groundwater in this area makes foundation pit excavation difficult and slow. Conventional mechanical earthwork excavation in layers cannot achieve precipitation layering well, which brings great difficulties to the control of groundwater level in red sandstone geology. Contents of the invention [0003] In order to solve the above prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/10
CPCE02D19/10
Inventor 耿永松
Owner CHINA MCC17 GRP
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