Cast-in-place pile structure passing through karst cave and construction method of cast-in-place pile structure

Abstract

The invention discloses a cast-in-place pile structure passing through a karst cave and a construction method of the cast-in-place pile structure. The cast-in-place pile structure comprises an upper pile segment, a middle pile segment and a lower pile segment. The lower pile segment is an end support rock-socketed waterproof pile prefabricated through reinforced concrete. Junked tires are stackedand fixedly connected to form a sleeve structure, a middle pile segment reinforcement cage and the end support rock-socketed waterproof pile are connected, sleeves are arranged on the middle pile segment reinforcement cage in a sleeving manner, and the sleeves and the middle pile segment reinforcement cage are hoisted together to be placed in a pre-driven pile hole. The end support rock-socketed waterproof pile is arranged in a bearing hole, located in a rock area, of the bottom of the karst cave, then the middle pile segment is cast under protection of the sleeves, then the clearance betweenthe top of the middle pile segment and the pile hole is blocked off, then the upper pile segment is cast according to a conventional method, and construction of the whole cast-in-place pile structureis completed. According to the cast-in-place pile structure, the characteristics that the junked tires are good in water-resisting property and structure strength, not prone to being corroded and widein source are fully utilized, and through combination with the drilling cast-in-place pile structure, the novel environment-friendly anti-corrosion drilling cast-in-place pile structure and the construction method are provided.

Description

technical field [0001] The invention belongs to the field of engineering pile foundation construction, and relates to a cast-in-place pile, in particular to a cast-in-situ pile structure passing through karst caves and a construction method thereof, a structure and a construction method of a new bored cast-in-place pile suitable for underground rivers, karst and other geological environments . Background technique [0002] As a geological environment that is not conducive to building buildings, karst caves are ubiquitous in limestone areas. In the construction of bored piles in the mountainous areas of Southwest China, it is common to encounter karst caves and unfavorable geological conditions such as underground karst water or underground rivers in the caves. It will bring huge security risks to the structure. For karst caves containing karst groundwater, concrete and other waste residues are usually used for landfill during the construction of traditional cast-in-place p...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a new type of bored cast-in-place pile that passes through the karst cave in the karst area, which is simple in construction, practical and economical, durable, low in cost, low in carbon and ecological in view of the problems of ecological environment friendliness, waste of materials, and construction technology. structure and its construction method

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