Construction method of soft-foundation reinforced concrete cast-in-place pile
A technology of reinforced concrete and construction method, which is applied in the direction of foundation structure engineering, sheet pile wall, building, etc., can solve the problem of difficult application of soft soil foundation, etc., and achieve the effect of shortening the hole forming time, simple and easy operation, and high construction efficiency.
Active Publication Date: 2014-09-03
TIANJIN 20 CONSTR
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Problems solved by technology
[0005] The present invention aims to solve the technical problem that the existing reinforced concrete cast-in-place pile construction method is difficult to apply to soft soil foundations, and provides a construction method for reinforced concrete cast-in-place piles in soft soil foundations
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[0031] For being able to further understand content, characteristic and effect of the present invention, below in conjunction with accompanying drawing, describe in detail as follows:
[0032] This embodiment discloses a construction method for concrete pouring piles on soft ground, and the specific construction steps are as follows:
[0033] Measure the location to determine the center position of the reinforced concrete cast-in-place pile 2.
[0034] The steel casing 3 is sunk into the design position of the reinforced concrete cast-in-place pile 2 by the vibrating pipe sinking method, and its center point is consistent with the center point of the reinforced concrete cast-in-place pile 2 determined above, and the sinking depth is the design depth. Wherein, the length of the steel casing 3 is 25m, which should be greater than the length of the reinforced concrete pile 2; the inner diameter is 810mm, which is equal to the diameter of the reinforced concrete pile 2.
[0035] ...
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The invention discloses a construction method of a soft-foundation reinforced concrete cast-in-place pile. The construction method includes the steps of measuring and positioning to determine a center of the reinforced concrete cast-in-place pile; sinking a steel sleeve to a certain depth by vibration sinking, using a rotary-drilling piling machine to drill a hole in the steel sleeve, and injecting clear water into the steel sleeve; hoisting a reinforcement cage into the steel sleeve; hoisting a concrete guide tube into the steel sleeve; casting concrete to form a reinforced concrete cast-in-place pile with top elevation meeting the design requirements; pulling out the steel sleeve by vibration process; and inspecting quality of the formed reinforced concrete cast-in-place pile. The construction method is simple and easy to operate, high in construction efficiency, safe and reliable. Construction cost is lowered greatly, work efficiency is improved, and human, material and financial resources are saved. A mud settling sump is not needed, and environmental pollution is reduced. The construction method is quite applicable to construction environments such as soft foundations, regions with abundant underwater and the like.
Description
technical field [0001] The invention relates to a construction method of reinforced concrete piles in foundation engineering, in particular to a construction method of reinforced concrete cast-in-place piles in soft ground. Background technique [0002] Generally, reinforced concrete cast-in-place piles are constructed by punching and pouring method. An impact drill or a hoist is used to drive a certain weight of the impact drill bit to lift the drill bit within a set height, and then the drill bit is free to fall in the air, and the impact kinetic energy is used to squeeze the soil. Layers or broken rock formations form pile holes, and then circulating fluid is used to discharge drilling slag and cuttings. It can be seen that this construction method has relatively high requirements on geological conditions and is only suitable for filling soil layers, clay layers, silt layers and gravel soil layers. [0003] However, hole collapse is very common in reinforced concrete cas...
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IPC IPC(8): E02D5/38E02D7/18
Inventor 肖策
Owner TIANJIN 20 CONSTR