Construction method for rock-entering cast-in-situ bored piles with diameter of less than 1.5m

A technology of bored piles and construction methods, which is applied in the direction of sheet pile walls, foundation structure engineering, foundation structure tests, etc. It can solve problems such as inability to salvage quality and equipment, drill bits are easy to get stuck in rock formations, and drilling efficiency is reduced. Achieve the effect of reducing project quality risk, shortening construction period, and fast hole forming speed
CN102226340BInactive Publication Date: 2013-03-27CHINA FIRST METALLURGICAL GROUP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA FIRST METALLURGICAL GROUP
Publication Date
2013-03-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a construction method for rock-entering cast-in-situ bored piles with a diameter of less than 1.5m. The method comprises the following steps: making all preparations, carrying out line laying for measurement, and burying a steel casing 1; drilling holes by using a rotary digging machine until the drilled hole reaches the bottom elevation of the hole; detecting the verticality and hole diameter of the drilled hole and taking out the steel casing 1; re-checking the positions of piles and burying a steel casing 2; drilling holes by using a percussion drill, and carrying out detection on the verticality and hole diameter of the drilled hole; carrying out routine detection on finally-drilled holes; carrying out first hole cleaning on the drilled holes; burying a reinforcing cage in the drilled hole; installing a duct; carrying out second hole cleaning on the drilled holes; pouring concrete into the drilled holes until the construction process is completed; and carrying out routine detection on the bored concrete piles. In the method provided by the invention, through setting a rational drill diameter, the hole-forming speed can effectively improved, the construction period can be greatly shortened, and the engineering quality risks can be lowered; meanwhile, the occupied road construction time can be reduced, a large amount of cost can be saved, the noise can be lowered, and the emission of mud can be reduced, thereby meeting the requirements for environmental protection and energy conservation of urban engineering construction.
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Description

technical field

[0001] The invention relates to a construction method of cast-in-situ piles, in particular to a construction method of rock-in-place bored piles with a diameter greater than 1.5 meters. Background technique

[0002] With the development of cities, viaducts are widely used to solve the problem of urban traffic pressure. At present, the span of bridges continues to increase, and the application of large-diameter ultra-deep rock bored piles has also increased dramatically. Most urban viaducts are constructed in the middle of urban roads, so the construction period is very tight. Among them, the construction of bored piles occupies a large amount of construction period, especially the large-diameter ultra-deep rock bored piles, which often become the bottleneck restricting the progress of the entire project. , The large-diameter ultra-deep rock bored pile construction in fields such as super high-rise buildings also encounters the same problem. At present, the u...

Claims

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