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Construction Method of Pile Foundation of Bridges and Caves in Karst Area

A construction method and technology in karst areas, applied in bridges, bridge construction, infrastructure engineering, etc., can solve problems such as ground subsidence, achieve the effects of saving construction costs, speeding up the progress of hole formation, and ensuring the quality of pile formation

Active Publication Date: 2021-07-16
中建新疆建工土木工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Bridge pile foundation construction located in karst landform areas is prone to safety accidents such as drill sticking, inclined drilling, hole collapse, and ground subsidence

Method used

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  • Construction Method of Pile Foundation of Bridges and Caves in Karst Area
  • Construction Method of Pile Foundation of Bridges and Caves in Karst Area
  • Construction Method of Pile Foundation of Bridges and Caves in Karst Area

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Embodiment Construction

[0069] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0070] Such as Figure 1 to Figure 4 Commonly shown, a construction method for bridge karst cave pile foundations in karst areas, including the following steps: punching and karst cave treatment, repeating the punching and karst cave treatment until the final hole is formed; this embodiment specifically includes: construction preparation, initial selection of the scheme , punching, karst cave treatment, continue punching... (cycle karst cave treatment, choose treatment plan and punching according to actual effect), and form holes.

[0071] Cave treatment, specifically includes the following steps...

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Abstract

The invention discloses a pile foundation construction method for a bridge in a karst area, which comprises the following steps: punching and treating caves, and repeating the punching and cave treatments until finally holes are formed; the cave treatment specifically includes identifying types and processing steps, wherein The identification type is to judge the cave type according to the vertical depth and the presence or absence of fillings before drilling, during the drilling process and during the pouring process; the treatment methods include pretreatment before construction, treatment in the drilling and concrete Handling during perfusion. The invention adopts different treatment methods for different caves, so that the pile foundation construction in the caves is safer and more effective; the purpose of speeding up the progress of hole formation, ensuring the quality of pile formation and saving construction cost is achieved.

Description

technical field [0001] The invention relates to the technical field of bridge pile foundation construction in karst areas, in particular to a construction method for bridge pile foundations in karst areas. Background technique [0002] The construction of bridge pile foundations located in karst landform areas is prone to safety accidents such as drill sticking, inclined drilling, hole collapse, and ground subsidence. This application is based on the construction of the bridge pile foundation of the first bid section of the South Fourth Ring Road in Wuhan City, based on the geological survey data revealed the height of the cave, the number of cave layers, the depth of burial, the thickness of the roof rock layer, etc., combined with the actual treatment effect of the cave, a brief description Treatment methods of pile foundation karst caves under different karst geological development forms. [0003] The first tender section of the South Fourth Ring Road in Wuhan is mainly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/00E02D5/38E02D27/12E01D21/00
CPCE01D21/00E02D3/00E02D5/38E02D27/12
Inventor 张瑞智郝玉锋谷加勇
Owner 中建新疆建工土木工程有限公司
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