Construction device suitable for silty-fine sand stratum foundation pit dewatering

Abstract

The invention relates to a construction device suitable for silty-fine sand stratum foundation pit dewatering, and belongs to the technical field of civil engineering. The construction device suitable for silty-fine sand stratum foundation pit dewatering is located on a foundation and comprises a supporting table and a water tank; the supporting table is located at the edge close to the foundation pit, a jet pump and a driving motor are arranged on the supporting table, a barometer is arranged on the jet pump, a water suction pipeline is fixedly connected with one end of the jet pump, and the other end of the jet pump communicates with a water collecting tank through a water outlet pipeline; a main water pumping pipe is horizontally arranged in the foundation pit, the water suction pipeline communicates with the main water pumping pipe, and the main water pumping pipe communicates with a plurality of vertically arranged water pumping pipes; water inlet holes are formed in the wall of the water pumping pipe; the water pumping pipe needs to extend below the bottom surface of the foundation pit; a grouting pipe is located on the pit wall of the foundation pit and controls the grouting flow through the driving motor; and a pore pressure meter is arranged on the water pumping pipe. The construction device suitable for silty-fine sand stratum foundation pit dewatering is reasonable in arrangement, drainage is carried out through the jet pump, and the effect is stable; and multi-directional drainage requirements can be effectively and flexibly met.

Description

technical field [0001] The invention relates to a construction device suitable for dewatering foundation pits in silt and fine sand strata, and belongs to the technical field of civil engineering. Background technique [0002] Precipitation is an important condition for foundation pit excavation. Its purpose is to control the water level of the foundation pit to 1.0m below the bottom of the foundation pit, reduce the water content of the soil in the pit, facilitate excavators and workers to work in the pit, and benefit the soil in the pit. The side slope is stable to prevent soil landslides in the pit; 2) Prevent sudden surges at the bottom of the foundation pit to ensure the stability of the foundation pit floor during construction; 3) Through scientific precipitation control, minimize the surface settlement caused by precipitation and reduce the The impact of foundation pit precipitation on the surrounding environment. [0003] The silt-fine sand stratum is generally lo...

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Problems solved by technology

[0004] Most of the existing dewatering devices have defects such as poor sealing and large vibration. At the same time, in the case of foundation pit dewatering in water-rich powder and fine sand formations, there have been instability problems caused by leakage of foundation pit enclosure structures. Dewatering and monitoring The combination of emergency management, emergency rescue and other aspects is also a question worthy of consideration

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