Water level control device for deep foundation pit excavation of deep sandy soil

Abstract

The invention discloses a water level control device for deep foundation pit excavation of deep sandy soil. The water level control device comprises a base, a water pumping mechanism, a sliding mechanism, a supporting plate, a first supporting rod, a second supporting rod, a floating ball, a limiting mechanism and a lantern ring. The water level control device has the beneficial effects that the end, deviating from the base, of the supporting plate is slidably connected with the first supporting rod; the first supporting rod is slidably connected with the second supporting rod, the bottom endof the second supporting rod can abut against the pit bottom of the foundation pit all the time in the foundation pit excavation process, the distance between the floating ball and the pit bottom canbe controlled, the water level in the foundation pit can be controlled conveniently, and excavation of the foundation pit is facilitated; and the lantern ring is connected with the second supporting rod in a sliding mode and arranged between the first supporting rod and the floating ball, the position of the floating ball on the second supporting rod can be better controlled, the water level of accumulated water in the foundation pit can be conveniently controlled to be unchanged, water pumping of the water pumping mechanism on the floating ball is facilitated, and excavation of the foundationpit is facilitated.

Description

Technical field[0001]The present invention relates to a water level control device, specifically a water level control device for deep-thick sand-shaped soil deep foundation pit, belonging to the field of building technology.Background technique[0002]Foundation pit is the foundation design position according to the solar pit excaving the base elevation and the foundation plane size. Before excavating, according to geological hydrological materials, combined with buildings near the site, the excavation plan is determined, and waterproof drainage work is made. Excavation is not deeply available to use the slope, so that the soil slope is stable, and its slope is determined according to the relevant construction regulations. Excavation and neighboring builders, can be used in the base pit wall support method, the spray concrete retaining method, large foundation pit or even use underground continuous wall and column-type drilling pile chains, protect the outer soil layer .[0003]However...

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Problems solved by technology

[0003] However, since the bottom of the foundation pit is gradually lowered after excavation, rainwater will accumulate at the bottom of the foundation pit in rainy days, and water seepage will also enter the foundation pit from the side walls of the foundation pit. The bottom of the foundation pit is accumulated, and a certain amount of accumulated water is stored at the bottom of the foundation pit, which will soften the mud layer at the bottom of the foundation pit and facilitate excavation; however, once the accumulation of water is too deep, it will hinder the excavation of the foundation pit to a certain extent. When the machine is soaked, the machine cannot work; the existing technology uses a water pump to pump water from the bottom of the foundation pit to facilitate the drainage of the foundation pit. All the water in the pit is pumped out, which affects the excavation work of the foundation pit

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