Construction method of watery red sandstone geological underground water level control

Abstract

The invention provides a construction method of watery red sandstone geological underground water level control. The construction method is characterized by comprising the following steps: 1) construction preparation; 2) deepening design and optimization of a light well point precipitation scheme; 3) installation of a plurality of light well point precipitation devices; 4) running of a vacuum pump, debugging and pumping, and pumping running; 5) layered earthwork excavation and layered precipitation; 6) reducing a cushion layer by several times, reducing a branch pipe and re-debugging the pumping; 7) closing the cushion layer, and continuously precipitating; 8) stopping precipitation of light well point precipitation devices. Specific to the characteristics of high underground water level and big water content of red sand rock, the construction method can well control the excavation depth of every layer in case of softened red sand rock, reduced intensity and disintegrated earthwork for the seepage of underground water since the precipitation is not timely.

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 the area along the Yellow River in the west, there are a large number of Tertiary weathered sandstones underground. The water content in this sandstone is relatively large. Generally, the initial water level is 5m underground, and the static water level is about 3m underground. After disintegration and disturbance, the strength decreases sharply, and the water content is uneven, which brings great difficulties to precipitation treatment and earthwork excavation. 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] The purpose of the present invention is to provide a cons...

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Problems solved by technology

[0002] In the area along the Yellow River in the west, there are a large number of Tertiary weathered sandstones underground. The water content in this sandstone is relatively large. Generally, the initial water level is 5m underground, and the static water level is about 3m underground. After disintegration and disturbance, the strength decreases sharply, and the water content is uneven, which brings great difficulties to precipitation treatment and earth excavation

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

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