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Water drill dug pile construction method

A construction method and technology of digging piles, which are applied in sheet pile walls, foundation structure engineering, erection/assembly of bridges, etc., to achieve the effects of fast construction progress, slow solution progress, and reduced labor cost input

Inactive Publication Date: 2011-05-25
CCCC FOURTH HIGHWAY ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to aim at the defects existing in the current manual hole-digging process, and to provide a construction method for manual hole-digging piles with high construction efficiency, little disturbance to the surrounding rock formations, and low construction noise.

Method used

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Embodiment Construction

[0033] The construction method of the water drilling excavation pile proposed by the present invention adopts layered construction. When constructing each layer, first utilize the water drilling to drill some column cores of a certain height around the inner wall of the pile hole, so that the pile foundation core and the whole rock Separate to form a free surface, then use a hand drill to drill holes in the pile foundation core, insert steel wedges in the holes, and then hammer the steel wedges with a hammer, the steel wedges will give the pile foundation core a horizontal tension and shear force. Shear stress, when the horizontal tensile force and shear stress are greater than the ultimate tensile and shear stress of the rock, the core of the pile foundation will be cracked and sheared, split with the whole rock, and the broken rock will be cleared out of the pile hole , Correct the pile hole, and then proceed to the next layer of construction according to the same process, so...

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Abstract

The invention relates to a water drill dug pile construction method. In the method, layered construction is adopted, and a plurality of cylinder cores with certain height are drilled around the inner wall of a pile hole by a water drill when each layer is constructed, so that a pile foundation core is separated from the whole rock to form a free face; the pile foundation core is punched by an electric hand drill, and steel wedges are inserted into holes respectively; the steel wedges are hammered by a hammer, so that the steel wedges apply horizontal tension and shear stress to the pile foundation core; when the horizontal tension and the shear stress are larger than the limit tension stress and shear stress of the rock, the pile foundation core can be subjected to tension fracture and shear fracture to be split from the whole rock so as to clear fragmented rock away from the pile hole and correct the pile hole; and the next layer is constructed by the same processes and the processes are repeated until the pile hole is formed.

Description

technical field [0001] The invention relates to a construction method for excavating holes for bridge pile foundations, belonging to the field of bridge pile foundation construction. Background technique [0002] The bridge foundation generally adopts the pile foundation type. The pile foundation can transfer the weight and load of the superstructure of the bridge to the bearing layer to ensure the normal operation of the bridge. Pile foundation construction usually adopts mechanical digging, manual digging and other construction methods. According to the geological conditions and construction environment of the location, the pile hole excavation methods are also different. For areas with steep slopes of the construction work surface, narrow sites, and no large drilling rigs, it is not suitable to use mechanical bored piles, and only manual excavated piles can be used. [0003] The construction methods of traditional manual excavation piles mainly include: 1. Manually use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/34E01D21/00
Inventor 王林国陈卫华薛维龙张志龙万刚邓平
Owner CCCC FOURTH HIGHWAY ENG
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