Method and device for installing steel sheet piles in sandstone stratum through rotary drilling rig

Abstract

The invention belongs to a method and device for installing steel sheet piles in a sandstone stratum through a rotary drilling rig. The device for installing the steel sheet piles in the sandstone stratum through the rotary drilling rig comprises the rotary drilling rig and further comprises a spiral wing rotary drilling barrel with rotary drilling teeth, a lengthened steel protection barrel and a steel sheet pile jacking and pressing disc in butt joint with the lower end of a drilling rod of the rotary drilling rig. According to the method for installing the steel sheet piles in the sandstone stratum through the rotary drilling rig, hole guiding can be completed only through one rotary drilling rig, the spiral wing rotary drilling barrel with the rotary drilling teeth, the lengthened steel protection barrel and the steel sheet pile jacking and pressing disc are driven through the drilling rod of the rotary drilling rig, it is guaranteed that the drilling rod enables the spiral wing rotary drilling barrel with the rotary drilling teeth to drill footage through rotating power, and hole sleeving is completed; then a drilling bucket of the rotary drilling rig is used for cleaning a pebble bed and a sandstone in the barrel, then the barrel is backfilled with clay, then the barrel is pulled out through reverse rotating force of the drilling rod of the rotary drilling rig, and finally the steel sheet pile jacking and pressing disc is used for jacking and driving a steel sheet pile till a cofferdam is closed. According to the method and device for installing the steel sheet piles in the sandstone stratum through the rotary drilling rig, steel sheet pile implanting can be finally completed only through one rotary drilling rig, the steel sheet pile cofferdam is completed, and the steel sheet pile implanting speed and efficiency can be improved.

Description

technical field [0001] The invention belongs to a method and a device for installing steel sheet piles with a rotary drilling rig in a sandstone formation. Background technique [0002] The steel sheet pile is a support structure formed by continuous tight occlusion, and the cofferdam is a temporary closed space surrounded by steel sheet piles, which can prevent the inflow of water and soil, and ensure the smooth progress of the internal engineering construction of the cofferdam (such as bridge piers or caps, etc.) . Usually bridge piers or caps are set in pebbles and sandstone strata on the river bank, and cofferdams composed of steel sheet piles with a height of 12m can create ideal construction conditions for bridge piers or caps. Steel sheet pile cofferdams have high strength, good waterproof performance, and various shapes. It has the advantages of construction in deep water and reuse. [0003] The steel sheet piles of the cofferdam are generally driven by traditional...

AI Technical Summary

Problems solved by technology

This construction process requires the seamless connection between the rotary drilling rig and the crawler crane. When the construction site is limited, it is easy to cause cross-operation between the rotary drilling rig and the crawler crane, which is not conducive to the construction progress on site. The construction speed is slow and the efficiency is low. The total depth of the hole exceeds 10m, and the steel casing is difficult to pull out later

Moreover, the construction process is relatively complicated, and there are many construction procedures, resulting in low efficiency of rotary excavation and leading holes, which has an adverse impact on the construction period of the underwater cofferdam project

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