Construction method and structure for prefabricated tubular pile to penetrate through karst cave

Abstract

The invention discloses a construction method and structure for a prefabricated tubular pile to penetrate through a karst cave. Force of the prefabricated tubular pile (7) is directly transferred to aforce holding layer (2) at the bottom of the karst cave through a steel pipe (5) penetrating through the karst cave (1). The construction problems that in the process of constructing the prefabricated tubular pile in the karst cave, the prefabricated tubular pile is likely to sink and incline and the bearing capacity at the bottom of the pile does not meet design requirements are effectively solved, the effect of reinforcing a soil body of the karst cave can be effectively achieved, and the bearing capacity requirement of the bottom of the prefabricated tubular pile can be guaranteed. Meanwhile, the construction technology can be used for reinforcing the force holding layer of the pile bottom of the prefabricated tubular pile in the karst cave in a targeted manner, so that the construction period is shortened, the material loss is reduced, the construction cost is reduced, and the national green construction requirement is met.

Description

technical field [0001] The invention relates to a construction method and structure for a prefabricated pipe pile penetrating a karst cave, and belongs to the technical field of building foundation construction. Background technique [0002] Underground karst caves and soil caves are common in southern my country. The stratum is rich in groundwater, weak in geology and low in bearing capacity, making it difficult to be used as a bearing layer for the bottom of prefabricated tubular piles. Due to the deep buried depth of underground soil caves and karst caves, it is difficult for most prefabricated pipe piles to be constructed to the underground bedrock layer. There are many construction technologies for the reinforcement of underground karst caves and soil caves. It is difficult to reinforce the bearing layer at the bottom of the prefabricated pipe piles in the karst cave with a large area of ​​reinforcement before the pile construction. The construction period is long, the ...

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Problems solved by technology

[0002] Underground karst caves and soil caves are common in southern my country. This stratum is rich in groundwater, the geology is weak and its bearing capacity is low, so it is difficult to be used as the bearing layer at the bottom of prefabricated pipe piles.

Due to the deep burial depth of underground caves and karst caves, it is difficult for most prefabricated pipe piles to be constructed to the underground bedrock layer. There are many construction technologies for the reinforcement of underground karst caves and soil caves. Large-area reinforcement before pile construction is difficult to achieve targeted reinforcement of the bearing layer at the bottom of prefabricated pipe piles in karst caves. The construction period is long, the construction cost is high, waste of manpower and material resources, and the construction quality cannot be guaranteed

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