Construction method for reverse construction method cast-in-place pile static load test pile
A technology of static load test pile and construction method, which is applied in basic structure engineering, basic structure test, construction and other directions, can solve the problems of difficult construction of static load test pile, low test pile accuracy and high cost, and achieves convenient construction and operation. , to ensure the continuity, the effect of speeding up the construction progress
Active Publication Date: 2014-11-19
CHINA CONSTR EIGHT ENG DIV CORP LTD
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the defects of the prior art, to provide a new construction method for the static load test pile of cast-in-place piles by the reverse method, and to solve the low precision and high cost of the existing self-balancing method for the test pile, and the construction difficulty of the existing static load test pile Large, long cycle, high cost and other issues
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[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0023] refer to figure 1 , shows the flow chart of the construction method of the static load test pile of the reverse method grouting pile of the present invention, the construction method of the static load test pile of the reverse method grouting pile of the present invention adopts one-time pouring of ultra-retarded concrete to the ground level, ensuring the continuity of the concrete The subsequent insertion of the steel pipe column can effectively ensure the accuracy of the bearing capacity test of the static load test pile, and the construction operation is convenient, which can speed up the construction progress. After pouring the ultra-retarded concrete, the HPE inserting machine is used to accurately insert the steel pipe column into the ultra-retarded concrete, which ensures the installation accuracy of the steel pipe column after in...
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The invention relates to a construction method for a reverse construction method cast-in-place pile static load test pile. The construction method comprises the steps that a pile hole is formed in a set position; a reinforcement cage is lowered in the pile hole; super long-setting concrete is poured to be close to the ground level, and a test pipe body is formed; the foundation around the pile hole is reinforced; a steel pipe column with a bottom opening is inserted into the test pile by using an HPE pipe inserting machine; after the super long-setting concrete is finally set, a hoop of the HPE pipe inserting machine is loosened, the HPE pipe inserting machine is moved away, and a pile head structure is manufactured on the pile body. The super long-setting concrete is adopted for being poured to reach the ground level at a time, the continuity of the concrete is ensured, and thus accurate testing data of the static load test pile are achieved.
Description
technical field [0001] The invention relates to the field of building construction, in particular to a construction method for static load test piles of cast-in-place piles by the upside-down method. Background technique [0002] During the construction of engineering piles, the self-balancing method is usually used to test the piles. A load box is installed at the balance point of the pile body and loaded along the vertical direction. The respective bearing capacities of the upper and lower parts of the load box can be measured at the same time. In the self-balancing method, the load box and the steel cage are welded into one body and put into the pile body, and then the concrete is poured into the pile. During the test, the oil pump is used to pressurize the ground. As the pressure increases, the load box will be displaced upward and downward at the same time, which will promote the exertion of pile side resistance and pile end resistance. The self-balancing test pile is ...
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IPC IPC(8): E02D33/00
Inventor 高海彦王宝德张兆吉
Owner CHINA CONSTR EIGHT ENG DIV CORP LTD