Pressure relief type drain hole

Abstract

The invention discloses a pressure relief type drain hole, and belongs to the technical field of building construction. The drain hole comprises a first pipe, a reducer pipe, a second pipe, water filtering holes, an elastic water-permeable expansion reducing cylinder and water filtering gauze, wherein the diameter of the first pipe is larger than the diameter of the second pipe, the first pipe andthe second pipe are connected through the reducer pipe, the water filtering holes are formed in the first pipe, the reducer pipe and the second pipe of the pipe section, inserted into concrete, of the drain hole, the reducer pipe and the second pipe are sleeved with the elastic water-permeable expansion reducing cylinder, and the pipe section, inserted into the concrete, of the drain hole and theelastic water-permeable expansion reducing cylinder are wrapped with the water filtering gauze. The drain hole can achieve good drainage and pressure relief effects simultaneously, and soil frost heaving damage to the side wall of a foundation pit is relieved.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a pressure relief type drain hole. Background technique [0002] In the construction foundation pit project in the seasonal frozen soil area, for the foundation pit project that needs to be used in winter, because the foundation pit cannot be backfilled, the side wall of the foundation pit is exposed to the low temperature environment outside, if the soil on the side wall of the foundation pit has frozen In the process of overwintering the foundation pit, the frost heaving of the soil on the side wall of the foundation pit will increase the horizontal load on the support structure, which will increase the internal force and deformation of the support structure; Frost heaving can easily cause the soil between the piles to fall off, and even destroy the protective surface layer of the side wall of the foundation pit, resulting in the collapse of the side w...

AI Technical Summary

Problems solved by technology

[0002] In the construction foundation pit project in the seasonal frozen soil area, for the foundation pit project that needs to be used in winter, because the foundation pit cannot be backfilled, the side wall of the foundation pit is exposed to the low temperature environment outside, if the soil on the side wall of the foundation pit has frozen In the process of overwintering the foundation pit, the frost heaving of the soil on the side wall of the foundation pit will increase

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