Waterproof method and waterproof structure for pile foundation underpinning underground storey-adding basement

Abstract

The invention provides a waterproof method and a waterproof structure for a pile foundation underpinning underground storey-adding basement, and relates to the technical field of underground storey-adding. The pile foundation underpinning underground storey-adding basement aims to solve the problem that the waterproof structure of the basement after underground storey-adding at present is easy to lose efficacy. The waterproof structure is arranged at the bottom of a pile hole in advance, an underpinning pile body is poured under the wrapping action of the waterproof structure, after a foundation pit is excavated, part of the waterproof structure is peeled off to be in lap joint with a waterproof layer in the foundation pit into a whole, the waterproof layer of the basement structure is integrally wrapped, underground water is effectively isolated, and the leakage problem is solved.

Description

technical field [0001] The invention relates to the technical field of underground layer building, in particular to a waterproof method and waterproof structure for a pile foundation underpinning underground layer building basement. Background technique [0002] Orderly, reasonable, comprehensive and efficient development and utilization of underground space resources of existing buildings has become one of the most effective ways to expand infrastructure capacity, improve urban comprehensive disaster prevention capabilities, improve land use efficiency and save land resources. According to the requirements of urban planning, most new buildings have considered the development and utilization of underground space. However, a large number of existing buildings have not designed underground parking lots due to the lack of forward-looking due to historical reasons. With the increase in the number of cars, it is difficult to park. It is an effective way to solve this problem by ...

AI Technical Summary

Problems solved by technology

However, the underpinning piles installed in the underground layer increase are important components supporting the existing buildings above, and need to pass through the added basement floor. If a waterproof layer is laid after excavating the foundation pit, the waterproof layer cannot cover the position of the underpinning piles, resulting in The lower end of the replacement pile contacts the foundation soil, part of the groundwater seeps into the basement along the underpinning pile, and the other part of the groundwater seeps into the basement along the side of the underpinning pile and the contact position of the waterproof layer, resulting in the failure of the basement’s waterproofing

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