Interception and drainage pressure-reduction anti-floating system

Abstract

The invention discloses an interception and drainage pressure-reduction anti-floating system which comprises a waterproof curtain arranged around an underground structure. A plurality of water collecting pits are formed below a bottom plate of the underground structure. Immersible pumps and water level induction switches are arranged in the water collecting pits. Well holes are formed in the bottoms of the water collecting pits. Pressure-reduction well pipes are arranged in the well holes. Anti-filtration layers are arranged around the pressure-reduction well pipes. The tops of the pressure-reduction well pipes are higher than openings of the well holes. The anti-filtration layers are located in the water collecting pits. The pressure-reduction well pipes are mainly formed by axially and vertically stacking a plurality of non-fine concrete well rings. The non-fine concrete well rings comprise upper annular ring beams, lower annular ring beams, stand columns and non-fine concrete wedge-shaped blocks. By means of cooperative work of the system, buoyant force on the bottom plate can be effectively reduced, the drainage amount can be controlled, the surrounding is protected against surface subsidence caused by the too large drainage amount, the number of uplift piles and the number of uplift anchor rods are greatly decreased, non-fine concrete blocks can be conveniently dismounted and replaced, and it is guaranteed that a pressure-reduction well has enough durability.

Description

technical field [0001] The invention belongs to the field of underground engineering anti-floating technology, and in particular relates to an anti-floating system for interception, decompression and anti-floating. Background technique [0002] At present, large and medium-sized cities across the country have successively entered the stage of large-scale development and utilization of underground space, and underground complexes with large scale and complete functions have emerged as the times require. These ultra-large underground structures have the characteristics of large buried depth and large area, but the superstructure has a small self-weight, and the problem of anti-floating is very prominent. Traditional anti-floating methods include setting uplift piles, uplift anchors, and increasing self-weight, etc. These methods have high construction costs and long construction periods, which increase sharply with the increase in depth and area of ​​underground structures, an...

AI Technical Summary

Problems solved by technology

Traditional anti-floating methods include setting uplift piles, uplift anchors, and increasing self-weight, etc. These methods have high construction costs and long construction periods, which increase sharply with the increase in depth and area of ​​underground structures, and even increase with the increase in groundwater level. Changes cannot be accurately predicted. A large number of uplift anchors and uplift piles are permanently left in the soil layer, which interferes with the original stratum environment and leaves hidden dangers for the subsequent development of underground space, which is contrary to the concept of green buildings.

[0003] Compared with traditional methods, drainage decompression and anti-floating methods have great advantages in terms of economy, construction period and environmental protection, but only emphasizing drainage is not enough. Uncontrolled drainage will cause serious environmental problems, and at the same time bring excessive damage to the drainage structure. The risk of silting increases and the reliability decreases. Therefore, while emphasizing drainage, it is also necessary to reduce the amount of seepage through water interception measures, that is, the interception, decompression and anti-floating system

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