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Construction method of pile foundations of bridge karst 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

Active Publication Date: 2019-09-13
中建新疆建工土木工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[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

Method used

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  • Construction method of pile foundations of bridge karst caves in karst area
  • Construction method of pile foundations of bridge karst caves in karst area
  • Construction method of pile foundations of bridge karst 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 described in further 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 construction method of pile foundations of bridge karst caves in a karst area. The construction method comprises the following steps: punching and karst cave treatment are conducted, and punching and karst cave treatment are carried out repeatedly till holes are formed finally; and karst cave treatment specifically comprises the steps of type identification and treating methods, wherein type identification is that before drilling starting, in the process of drilling and in the process of pouring, the types of the karst caves are judged according to the vertical depthand whether fillers exist or not, and the treating methods comprise pretreatment before construction, treatment during drilling and treatment in the process of concrete pouring. The different treatingmethods are adopted for the different karst caves, thus construction of the pile foundations of the karst caves is safer and more effective, and the purposes of accelerating the hole forming progress, ensuring the pile forming quality and saving the construction cost are 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] 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. 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 Wuhan South Fourth Ring Road is mainly composed of Gon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/00E02D5/38E02D27/12E01D21/00
CPCE01D21/00E02D3/00E02D5/38E02D27/12
Inventor 甄江辉张瑞志郝玉锋
Owner 中建新疆建工土木工程有限公司
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