Drilling and concrete injected root composite pile implanting pile structure and construction method

Abstract

The invention discloses a drilling and concrete injected root composite pile implanting pile structure. The drilling and concrete injected root composite pile implanting pile structure comprises a pile hole, a pipe pile which is implanted into the pile hole and concrete layers between the pipe pile and the pile hole and inside the pipe pile walls. The implanting pile structure construction method comprises the following steps of (1) drilling the pile hole with the diameter larger than that of the pipe pile in a required pile position in the foundation through drilling machinery; (2) pouring concrete into the pile hole root through a grouting pipe; (3) inserting a prepared pipe pile into the pile hole which is poured with concrete, enabling the concrete to move upward along the pipe wall of the pipe pile and a gap between the pipe pile and the pile hole and performing concrete consolidation forming after pile implanting is achieved. The composite pile implanting pile structure has a high bearing capacity as a drilling pipe and is superior to the drilling pipe in cost. The implanting pile structure construction method needs no mud retaining wall, is environmental friendly in construction progress and shortens the construction days.

Description

[0001] technical field [0002] The invention relates to the technical field of building materials, and relates to a combined pile planting structure in which holes are drilled and concrete is injected into the root, and a construction method of the combined pile planting structure. Background technique [0003] With the development of concrete technology, the technology of concrete pipe piles is becoming more and more mature. In addition to being used in industrial and civil buildings, it is also widely used in various fields such as bridges, ports, railways or water conservancy projects. At present, with the continuous growth of the scale of the city and the rapid development of urban construction, the land resources available for construction are becoming less and less, so housing construction is developing towards high-rise buildings, and various high-rise and super high-rise buildings have become the current construction leader. For the foundation engineering of high-ri...

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Problems solved by technology

[0004] Although the existing prefabricated piles are widely used in construction, there are still many disadvantages: for example: in soft soil foundation, the resistance around the pile is not fully exerted; the strength of the pile body cannot be fully exerted under the vertical compressive load in soft soil foundation; When the construction is improper, the pile body is prone to tilt, causing damage to the pile body; when the welding construction is improper and the pile head structure is not handled properly, the pull-out bearing capacity cannot meet the requirements; the deformation performance is not high enough, and it is easy to be brittle and damaged.

[0005] Existing prefabricated piles are generally dominated by hammering pile sinking and static pressure pile sinking construction, and there is often soil extrusion, which affects surrounding facilities (underground structures, pipelines) during construction; construction consumes high energy, generates noise and air Pollution; it is difficult to penetrate various interlayers; improper construction may cause macroscopic or microscopic damage to the pile body; the elevation of the pile top is difficult to control, and improper pile cutting may easily cause damage to the pile head or changes in the prestress of the pile body; Restrictions, can not meet the high-rise or super high-rise bearing capacity requirements and other issues

In addition, the existing cast-in-situ piles also have the following problems: neck shrinkage, mud discharge has become a social problem; sediment at the bottom of the pile occurs from time to time, and the quality of the pile body fluctuates greatly and is not stable enough; It is very difficult; it is difficult to keep the site tidy; the construction speed is slow and the efficiency is low; the converted bearing capacity of unilateral concrete is only 30% to 40% of PHC piles, and the limited resources are not fully utilized, etc.

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