Construction method of hydraulically squeezed and expanded combined bladder bag grouting pile body enlarged and reinforced bored pile
A technology of bored piles and construction methods, which are used in sheet pile walls, infrastructure engineering, construction, etc.
Active Publication Date: 2021-04-09
中煤长江基础建设有限公司
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Problems solved by technology
[0005] The purpose of the present invention is to solve the existing problems in the construction of existing enlarged and reinforced bored piles, and propose a construction method for enlarged and reinforced reinforced bored piles with hydraulic extrusion combined with bladder bag grouting
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[0047] In order to deepen the understanding of the present invention, reference will be made to Figure 1 to Figure 13 , the embodiments of the present invention are described in detail, the following embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation is provided, but the protection scope of the present invention is not limited to the following embodiments.
[0048] combined with Figure 5 and 9 As shown, a kind of hydraulic squeeze expansion joint bladder grouting pile body that the present invention relates to expands the reinforced bored cast-in-place pile, comprises cast-in-place pile pile body, and cast-in-situ pile pile body comprises reinforcement cage 3 and concrete 14, and cast-in-situ pile pile length is The diameter of cast-in-situ pile is 22m, the diameter of cast-in-situ pile is 1m, the longitudinal bar of steel cage is hot-rolled ribbed HRB400Φ16, the stirrup is spiral hoop HPB235Φ8@100, and...
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The invention relates to a construction method of hydraulic extrusion combined with bladder bag grouting pile body expansion and reinforcement of bored pile, which is characterized in that: after the drilling is completed, the prepared steel cage and hydraulic equipment are placed in the drill hole, and the bladder The grouting extruded body is wrapped with bladders, and then the reinforcement cage is lowered into the hole for hydraulic expansion, and finally bladder grouting and concrete pouring are carried out; the construction method includes drilling into holes, fabrication of reinforcement cages, steel casing Installation of tubes, expansion boards, bladders, etc., installation of hydraulic equipment, lowering of steel cages, hydraulic extrusion construction, bladder grouting, concrete pouring, cleaning and maintenance of hydraulic equipment. The extrusion expansion body of the present invention can be deployed in the corresponding soil layer, and reinforcement is arranged in the extrusion expansion body, which improves the strength of the extrusion expansion body itself and the interface strength with the pile body, increases the contact area with the soil, and improves the Pull-out bearing capacity, reduce the length and spacing of cast-in-situ piles, reduce costs, and save resources.
Description
technical field [0001] The invention relates to the technical field of cast-in-situ pile construction in pile foundation engineering, in particular to a construction method for expanding and reinforcing bored cast-in-place piles with hydraulic extrusion combined with bladder bag grouting pile body. Background technique [0002] Pullout piles are widely used in anti-floating of large basements and anti-lifting of high-rise buildings (structures). With the widespread application of uplift pile construction technology, more and more people pay attention to the mismatch between pile strength and uplift bearing capacity and soil friction. The pile length and design uplift bearing capacity of a single pile are calculated based on the investigation data. For areas where the friction bearing layer is silty clay and soft soil with high water content and low permeability, the design scheme of large-diameter cast-in-situ piles is generally adopted for the uplift-resistant piles. The p...
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IPC IPC(8): E02D5/38
CPCE02D5/38
Inventor 黄佳波陈春银陈跃虎刘宽荆苏兴
Owner 中煤长江基础建设有限公司