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Construction method of large-diameter expanded bore pile based on PCC pile

A construction method and a technology for expanding bottom piles, which are applied in basic structure engineering, sheet pile walls, buildings, etc., to achieve the effects of high construction efficiency, time saving and good safety.

Inactive Publication Date: 2010-03-10
HOHAI UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of construction method of large-diameter enlarged-bottom pile based on PCC piles, overcome the defect of the large-diameter enlarged-bottom pile construction method, make full use of the characteristics of fast construction of PCC piles and the advantages of high bearing capacity of large-diameter expanded-bottom piles , to develop a construction method for large-diameter expanded-bottom piles based on PCC piles

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  • Construction method of large-diameter expanded bore pile based on PCC pile
  • Construction method of large-diameter expanded bore pile based on PCC pile
  • Construction method of large-diameter expanded bore pile based on PCC pile

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Embodiment Construction

[0028] like Figure 1 ~ Figure 4 As shown, a construction method of large-diameter bottom-expanding piles based on PCC piles, the main technical steps are as follows:

[0029] (1) Construction and maintenance of PCC pile 1

[0030] The construction technology of PCC pile 1 is relatively mature, and its main steps include: sinking the steel inner and outer double-layer casing cavity structure into the foundation design depth under the protection of the closed valve pile shoe by means of vibration; Concrete is evenly poured into the cavity of the structure, and then the cavity structure is pulled out by vibration. When the cavity structure is pulled out, the valve spud cans are automatically separated, and the concrete in it is injected into the annular groove formed after the cavity structure is pulled out to form a PCC. pile. Since the PCC pile 1 mainly plays a supporting role in this pile type, its quality control standard can be appropriately relaxed to speed up constructi...

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Abstract

The invention discloses a construction method of a large-diameter expanded bore pile based on a PCC pile, mainly comprising the following steps: carrying out construction and maintenance on the PCC pile; taking out inner soil of the pile by adopting a high-pressure water jetting method; taking out part of subsoil of the pile; forming an extended bottom at the bottom of the PCC pile; laying a steelreinforcement cage; and casting the concrete to form the large-diameter expanded bore pile. In the method, the PCC pile is combined with the large-diameter expanded bore pile to form a novel pile which has mature technology and larger bearing capacity compared with the common large-diameter expanded bore pile. The method has high-efficiency construction and good safety.

Description

technical field [0001] The invention relates to a construction method of a pile foundation, in particular to a construction method of a large-diameter bottom-expanding pile based on a PCC pile. Background technique [0002] my country has a vast territory, and soft soil is widely distributed. There are many complex soft soil foundations in the coastal areas, especially in the Yangtze River Delta. When building structures such as high-rise buildings and bridges on soft soil foundations, pile foundations are generally used. The pile foundation generally passes through the weaker soil layer, and the soil layer with better soil quality is used as the pile end bearing layer. Large-diameter expanded-bottom piles can make full use of pile side friction and pile end resistance, so they have high bearing capacity and are widely used in various building foundations. Large-diameter bottom expansion piles mostly adopt the construction method of manual digging. When manually digging h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/44
Inventor 丁选明刘汉龙孔纲强陈育民
Owner HOHAI UNIV
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