A construction method of high anti-seepage and anti-floating pile raft structure

Abstract

The invention relates to a high anti-seepage and anti-floating pile raft structure, which is characterized in that a prestressed hollow pipe section is arranged on the upper part of the bored pile, the prestressed hollow pipe section is concentric with the bored pile, and the steel cage of the bored pile runs through the prestressed pile. The stress hollow pipe pile section extends into the raft foundation and connects with the steel bars in the raft; the inner side of the prestressed hollow pipe section is provided with internal connecting bars; sand cushion and gravel blind ditch are laid on the upper part of the foundation soil; the raft foundation is from bottom to bottom. The horizontal water-resisting layer, cement-soil slab, and reinforced concrete raft slab are arranged in sequence on the upper part; reinforcement materials are fixedly connected between the foundation pit enclosure piles and the side wall of the basement. The invention can not only enhance the integrity and strength of the upper structure, but also reduce the uplift pressure of groundwater and make full use of the waste mud of bored piles to realize waste utilization; the top of the pile body is provided with a prestressed hollow pipe section, which can save bored piles The pile cutting process improves the construction efficiency. The invention also discloses a construction method for the high anti-seepage and anti-floating pile raft structure.

Description

technical field [0001] The invention relates to a pile raft structure, belonging to the field of foundation treatment, which can improve the bearing capacity of the foundation, enhance the integrity of the upper structure, reduce the water pressure of the raft slab, and facilitate construction organization. It is suitable for large-scale building foundation projects, especially for docks, airports, Logistics yards and other foundation projects that have high requirements for anti-floating and anti-seepage of pile foundations and rafts. Background technique [0002] With the rapid development of urban construction, a large number of high-rise buildings, underground garages, sunken squares, subways, underground shopping malls and other buildings have put forward higher requirements for the utilization of underground space. However, in coastal cities such as Shenzhen, Dalian, and Qingdao, where the underground soil is rich in water, the buoyancy of the groundwater caused by the...

AI Technical Summary

Problems solved by technology

The uplift anchor pulls the basement structure as a whole and the rock layer or hard soil layer through its own tensile strength. The uplift anchor is usually arranged under the raft foundation, but the uplift anchor cannot bear the downward load, which is easy to cause damage to the building materials. waste

[0005] In summary, although the existing anti-floating and anti-seepage measures have achieved good results under suitable engineering conditions, the existing structures still have certain deficiencies in actual engineering, such as increased structural weight and difficulty in design and construction. , low utilization rate of materials, etc.

Images