Installation device and construction method of steel casing for drilling piles in sandy soil foundation

Abstract

The invention discloses a steel casing arrangement device for sand foundation cast-in-place pile drilling and a construction method of the steel casing arrangement device. The steel casing arrangementdevice comprises a pre-embedded steel plate and a guiding cylinder. The pre-embedded steel plate is slidably connected with a moving plate, a mechanical arm is arranged at the top end of a circular disc, and a matching frame is arranged at the end of the mechanical arm; and a clamping frame is arranged in the matching frame, a positioning cylinder is arranged in the clamping frame, a limiting device is arranged on the inner wall of the positioning cylinder, and the limiting device is used for fixing the guiding cylinder. The construction method comprises the following steps that (a) a steel casing is manufactured; (b) a construction foundation is leveled; (c) laying off of the arrangement position of the steel casing is conducted; (d) primary positioning of the arrangement position of thesteel casing is conducted; (e) precise positioning of the arrangement position of the steel casing is conducted; (f) the steel casing is driven and arranged at a first steel casing arrangement point;and (g) the steel casing is driven and arranged at remaining steel casing arrangement points. According to the steel casing arrangement device for sand foundation cast-in-place pile drilling and theconstruction method of the steel casing arrangement device, it can be ensured that the steel casing is always kept to be perpendicular in the driving and arranging process, meanwhile the steel casingcan be prevented from deforming, the arrangement accuracy of the steel casing can further be improved, and the construction quality of the steel casing is improved.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower engineering, and in particular relates to a steel casing setting device and a construction method for drilling piles in sandy soil foundations. Background technique [0002] Water conservancy and hydropower projects, sluice pump stations and other structural buildings are generally constructed at river embankments, and most of them use bored piles for foundation treatment. Under the ground, it is inevitable to encounter block stone layers that were used for anti-scouring reinforcement many years ago. The previous solution The solution is often to extend the working hours and increase the project investment under the condition of existing equipment, which not only increases the construction period and construction cost, but also makes it difficult to guarantee the project quality. [0003] The foundation geology of the sluice pumping station along the Qiantang River is usua...

AI Technical Summary

Problems solved by technology

However, in the prior art, when the steel casing is installed, the steel casing is directly driven into the construction foundation with a vibrating hammer. Due to the difference in the distribution of the underground soil, the stress around the steel casing is not uniform, and it is easy to tilt. Causes steel casing to reset

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