Construction method for digging pile foundation hole manually

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 ...

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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