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Karst cave stratum pile foundation structure and pile forming process

A technology of karst caves and formations, which is applied in the direction of foundation structure engineering, sheet pile walls, buildings, etc., can solve the problems of waste of concrete materials, and the structural strength of the pile foundation is not easy to form, so as to achieve the effect of improving structural strength, improving construction quality, and good quality

Inactive Publication Date: 2021-06-22
中基发展建设工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, during the drilling process, if an underground karst cave is encountered, the drill hole will be connected to the karst cave cavity. When concrete is poured later, a large amount of concrete will flow into the cavity of the karst cave, resulting in the amount of concrete poured far exceeding the design amount. Not only will it cause waste of concrete materials, but it will also cause the defects that the pile foundation is not easy to form or the structural strength is too low

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  • Karst cave stratum pile foundation structure and pile forming process
  • Karst cave stratum pile foundation structure and pile forming process
  • Karst cave stratum pile foundation structure and pile forming process

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Embodiment Construction

[0044] The following is attached Figure 1-4 The application is described in further detail.

[0045] The embodiment of the present application discloses a pile foundation structure in karst cave strata.

[0046] refer to figure 1, The pile foundation structure includes a borehole 1 opened on the karst cave formation, a casing 2 placed in the borehole 1 and a reinforcement cage 3 set in the casing 2 . Borehole 1 is formed vertically downwards from the ground with a rotary drilling rig, and after the borehole 1 passes through the roof above the karst cave, it passes through the cavity of the karst cave and extends to the rock mass at the bottom; the casing 2 is vertical The cylindrical structure is set, and the upper and lower ends of the casing 2 are open. The top end of the casing 2 is sleeved in the borehole 1 of the roof of the cave, and the bottom end is sleeved in the borehole 1 of the rock mass at the bottom of the cave. , that is, the casing 2 passes through the cavi...

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Abstract

The invention relates to a karst cave stratum pile foundation structure and a pile forming process, and belongs to the technical field of pile foundation construction. The karst cave stratum pile foundation structure comprises a drill hole formed in a karst cave stratum and a pile casing arranged in the drill hole. The drill hole vertically penetrates through a top plate of a karst cave and a wall body of the karst cave and then extends into a rock mass at the bottom of the karst cave, the length of the pile casing is larger than the height of a cavity of the karst cave, the top end of the pile casing is arranged in the drill hole of the top plate of the karst cave, the bottom end of the pile casing is arranged in the drill hole of the rock mass at the bottom of the karst cave, and concrete is poured into the steel pile casing. The pile casing is arranged in the cavity of the karst cave, the protective wall is formed in the position, in the cavity of the karst cave, of the pile casing, concrete is blocked by the pile casing and is not prone to flowing into the cavity of the karst cave in the concrete pouring process, so that it is guaranteed that the pouring amount of the concrete is consistent with the designed amount, waste of a large amount of concrete caused by the existence of the karst cave is avoided, and the quality of the formed pile foundation is correspondingly improved.

Description

technical field [0001] The application relates to the field of pile foundation construction, in particular to a pile foundation structure and a pile forming process in karst cave strata. Background technique [0002] During the pile foundation construction process, generally directly pour concrete into the borehole after the borehole is drilled on the surface, so that the concrete forms the pile foundation after solidifying in the borehole. [0003] However, during the drilling process, if an underground karst cave is encountered, the drill hole will be connected to the karst cave cavity. When concrete is poured later, a large amount of concrete will flow into the cavity of the karst cave, resulting in the amount of concrete poured far exceeding the design amount. It not only causes the waste of concrete materials, but also causes the defect that the pile foundation is not easy to form or the structural strength is too low. Contents of the invention [0004] In order to f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/12E02D5/38
CPCE02D27/12E02D5/38
Inventor 刘勇王秀丽杨慧崔文志韩永亮李敏韩秀茂姚朋
Owner 中基发展建设工程有限责任公司
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