Construction waste recycling drainage CFG pile foundation and construction method thereof

Abstract

The invention discloses a construction waste recycling drainage CFG pile foundation. The construction waste recycling drainage CFG pile foundation comprises a bearing stratum and a soil body. The bearing stratum is located below the soil body, a circular ring sand well is beaten in the soil body, concrete is poured in a circular ring of the sand well to form a pile, the axis of the sand well and the axis of the pile are located on the same straight line, the sand well and the pile are in the same depth, and the depth of the parts, entering the bearing stratum, of the sand well and the pile is not smaller than 0.5 m. The invention further discloses a construction method of the construction waste recycling drainage CFG pile foundation. The sand well drainage consolidation method and the CFG method are jointly applied to the foundation processing, a semi-rigid CFG pile serves as a pile core, the circular ring sand well is formed around the CFG pile, drainage consolidation processing is carried out on soft soil between the piles, and the load is jointly borne by the CFG pile and earth among pile through a cushion layer in a coordinated mode. The drainage consolidation of the foundation soil can be accelerated, the bearing capacity of the foundation is increased, resource utilization of construction waste is achieved, and environment pollution and construction cost are reduced.

Description

technical field [0001] The invention relates to the field of construction, in particular to a CFG pile foundation for regeneration and drainage of construction waste and a construction method thereof. Background technique [0002] At present, the widely used methods for foundation reinforcement mainly include drainage consolidation method and CFG (Cement Fly-ash Gravel-cement fly ash gravel pile) pile method. These two methods are relatively mature, and the combination of the two foundation treatment methods The methods for foundation reinforcement mainly include concrete core sand pile composite foundation treatment method and drainage powder spray pile reinforcement soft soil foundation treatment method. Concrete core sand pile is composed of prefabricated concrete core pile and core pile sandstone shell, while drainage powder spray pile The piles are composed of powder-sprayed piles and vertical drainage bodies (plastic drainage boards) between the piles. Both methods...

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Problems solved by technology

[0003] The existing drainage consolidation method and CFG pile method mainly have the following disadvantages: 1. Both the drainage consolidation method and the CFG pile method can improve the bearing capacity of the foundation to a certain extent, but when the site conditions are poor, the bearing capacity is seriously insufficient 2. The materials selected by the consolidation drainage method and the CFG pile method are all natural materials, which are not only expensive, but also consume a lot of natural resources and cause damage to the environment.

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