Horizontal dewatering device for foundation pit and using method thereof

Abstract

The invention provides a foundation trench horizontal precipitation device and a using method thereof. The foundation trench horizontal precipitation device comprises at least one filter pipe, a connector, a water drawing guide pipe and a water drawing pump; the filter pipe is internally provided with a filter net hole; the connector is embedded into a horizontal water containing sand layer, and one end of the connector is connected with the filter pipe; one end of the water drawing guide pipe is connected with the other end of the connector; and the water drawing pump is installed on a foundation trench side wall and is connected with the other end of the water drawing guide pipe, and stagnant water, filtered by the filter pipe, in the horizontal water containing sand layer is drawn through the water drawing pump. By means of the horizontal precipitation device can solve the problem that in the foundation trench slope excavation process, a permeable stratum like a silt layer containing underground water small in burial depth may be met, the stagnant water in the horizontal water containing sand layer can be simply, rapidly and effectively dewatered, and the foundation trench safety is guaranteed.

Description

technical field [0001] The invention belongs to the field of foundation pit engineering construction, and relates to a dewatering device, in particular to a horizontal dewatering device for a foundation pit and a use method thereof. Background technique [0002] In the foundation pit project, when the groundwater level is above the excavation surface, it is usually necessary to install a water-stop structure along the periphery of the foundation pit, and set a dewatering well inside the foundation pit for dewatering, so as to reduce the water head within the excavation range to 0.5 below the bottom of the foundation pit. m to ensure construction safety. When the groundwater level is lower than the bottom of the foundation pit, the groundwater content is low, and the soil quality is good, considering the cost and construction reasons, it is not necessary to install a water-stop structure around the foundation pit, and only need to set up drainage ditches in the foundation pit...

AI Technical Summary

Problems solved by technology

[0004] 1. The filter pipe of the dewatering well is not in this type of soil layer, so it cannot effectively drain the layer;

[0005] 2. When there is precipitation outside the pit, the water stop structure isolates the hydraulic connection, so that the water in the aquifer inside the foundation pit cannot be discharged

[0006] However, due to the excavation of the side wall of this kind of geological soil, the soil pressure on the side wall is released, and at the same time, the flow of water drives the soil particles to flow to the excavation surface. If it is not treated in time, it will cause quicksand and even cause the side wall of the foundation pit to collapse.

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