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Construction method for digging pile foundation hole manually

A construction method and pile foundation hole technology, applied in sheet pile wall, foundation structure engineering, construction, etc., can solve the problems of difficult to use high-stress rock formation, rock mass disturbance and adverse environmental impact, so as to reduce disturbance and environmental impact. Influence, convenient and labor-saving construction operation, simple equipment effect

Inactive Publication Date: 2016-07-27
CHINA RAILWAY 23RD CONSTR BUREAU LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings that the hammer impact crushing construction method used in the existing manual excavation pile construction in the prior art is difficult to apply to high-stress rock formations, and is unfavorable to rock mass disturbance and environmental impact, and provides a A construction method for manual excavation of pile foundation holes for integral separation and crushing of rock mass

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  • Construction method for digging pile foundation hole manually
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Embodiment

[0034] The span of the tie-rod arch of the Moujia Village Bridge spanning the Tongsan Expressway is 64m. The in-situ cast-in-place column support construction method is adopted. Due to the large span, a temporary pier is required. The foundation of the temporary pier is a pile foundation with a diameter of 1.25m. The pole arch spans the Jinzhong-South railway channel. The pile foundation is located about 1m outside the road shoulder, and the height of the roadbed is about 8m. Normal mechanical construction requires the construction of a working platform, but it will affect the existing line foundation. Mechanical construction is not suitable, and only manual hole-digging piles can be used. method, the rock at the bottom of the pile is gneissic monzogranite with a stress of 800kPa, and ordinary picks cannot be used for construction. At the same time, in order to reduce the impact of normal blasting on the subgrade of Jinzhong South Passage, the following methods are adopted: Fi...

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Abstract

The invention discloses a construction method for digging a pile foundation hole manually. The construction method comprises the following steps that a, measuring and setting-out are conducted; b, a coring path is set; c, a coring circle is drilled, and a hollow cavity, pile core rock and sawtooth rock with continuous sections are formed; d, the pile core rock is crushed, and crushed slags are conveyed out of the pile foundation hole; e, the sawtooth rock is removed, and a pile foundation circle is corrected so as to meet the design pile diameter; and f, the step a to step e are circulated till the pile foundation hole meets the design depth. By the adoption of the construction method, according to the characteristics that the compressive strength of the rock is high, and the shear strength is low, shear failure of rock stratum which is high in hardness and large in stress is made to happen, and the problem that during existing manual digging pile construction, an air pick is used for pressing and crushing, and thus construction is difficult to implement is solved; the mode that the slags are crushed and discharged after inner rock mass and peripheral rock mass of a pile foundation are separated is adopted, the disturbance of the peripheral rock mass and the environment influences are reduced, and the construction method is suitable for pile foundation hole digging of nearby existing railway lines, buildings and city districts; and meanwhile, the safety of the construction method is high, equipment is simple, construction operation is convenient, labor is saved, and the construction period is short.

Description

technical field [0001] The invention relates to a construction method of infrastructure, in particular to a construction method of manually digging pile foundation holes. Background technique [0002] In the construction of long-span bridges, temporary piers need to be erected due to the large span. When temporary piers are erected on bridges spanning existing lines, because the temporary pier foundations are close to the road shoulders of existing lines, normal mechanical construction requires the construction of operating platforms but will Due to the impact on the subgrade of existing lines, it is not suitable to use mechanical construction, and can only adopt the method of manual digging; at the same time, in the construction of urban pile foundations, the quality of pile foundations is high and the impact on surrounding buildings is small. In order to reduce the impact on the environment and Disturbance of the rock mass is generally carried out by manual digging in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/34
CPCE02D5/34
Inventor 秦振国田宝华刘延龙王红翟勇
Owner CHINA RAILWAY 23RD CONSTR BUREAU LTD
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