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A platform for research: civil engineering, architecture and urbanism
Rotary and impact drilling and spraying integrated high-pressure spraying process and device
The invention discloses a rotary and impact drilling and spraying integrated high-pressure spraying process. A driving mechanism for driving a drill rod to rotate and press down is mounted on the drill rod, a pulse impact mechanism is mounted in a lower cavity of the drill rod, the drill rod is connected with a drill bit in a spline form, a high-pressure cement paste nozzle and a high-pressure airnozzle are symmetrically arranged on the drill bit, the high-pressure cement paste nozzle is connected with a high-pressure mud pump through a pipeline, and the high-pressure air nozzle is connectedwith an air compressor. When drilling is performed, the driving mechanism drives the drill rod to rotate while pressing down, the pulse impact mechanism provides pulse impact force, efficient drillingis performed, cement paste sprayed by the high-pressure cement paste nozzle and high-pressure airflow jointly act to cut a stratum in the process of slowly lifting and rotating the drill rod after drilling to designed depth, and a high-pressure spraying impervious wall is formed. The process can be applicable to drilling and spraying integrated construction of the high-resistance stratum, the cement paste is directly sprayed while drilling is performed, the cement paste and stratum materials are uniformly stirred by the aid of the high-speed airflow and rotation of the drill rod, a high-pressure spraying pile is directly formed, and construction efficiency is high.
本发明公开了一种回旋+冲击钻喷一体高喷工艺，在钻杆上安装驱动钻杆旋转和下压的驱动机构，并且在钻杆下部腔体内安装脉冲冲击机构，钻杆以花键形式连接钻头，钻头上对称设置高压水泥浆喷口和高压空气喷口，高压水泥浆喷口通过管道连接高压泥浆泵，高压空气喷口连接空压机，钻孔时，通过驱动机构驱动钻杆一边下压一边旋转，同时脉冲冲击机构提供脉冲式冲击力，进行高效钻进，钻至设计深度后，在钻杆缓慢提升并旋转的过程中，通过高压水泥浆喷嘴喷出水泥浆与高压气流共同作用切割地层，形成高喷防渗墙。本发明可以适用于高阻力地层钻喷一体化施工，在钻孔的同时直接喷射水泥浆，并通过高速气流和钻杆的旋转使水泥浆与地层物料搅拌均匀，直接形成高喷桩，施工效率高。
Rotary and impact drilling and spraying integrated high-pressure spraying process and device
The invention discloses a rotary and impact drilling and spraying integrated high-pressure spraying process. A driving mechanism for driving a drill rod to rotate and press down is mounted on the drill rod, a pulse impact mechanism is mounted in a lower cavity of the drill rod, the drill rod is connected with a drill bit in a spline form, a high-pressure cement paste nozzle and a high-pressure airnozzle are symmetrically arranged on the drill bit, the high-pressure cement paste nozzle is connected with a high-pressure mud pump through a pipeline, and the high-pressure air nozzle is connectedwith an air compressor. When drilling is performed, the driving mechanism drives the drill rod to rotate while pressing down, the pulse impact mechanism provides pulse impact force, efficient drillingis performed, cement paste sprayed by the high-pressure cement paste nozzle and high-pressure airflow jointly act to cut a stratum in the process of slowly lifting and rotating the drill rod after drilling to designed depth, and a high-pressure spraying impervious wall is formed. The process can be applicable to drilling and spraying integrated construction of the high-resistance stratum, the cement paste is directly sprayed while drilling is performed, the cement paste and stratum materials are uniformly stirred by the aid of the high-speed airflow and rotation of the drill rod, a high-pressure spraying pile is directly formed, and construction efficiency is high.
本发明公开了一种回旋+冲击钻喷一体高喷工艺，在钻杆上安装驱动钻杆旋转和下压的驱动机构，并且在钻杆下部腔体内安装脉冲冲击机构，钻杆以花键形式连接钻头，钻头上对称设置高压水泥浆喷口和高压空气喷口，高压水泥浆喷口通过管道连接高压泥浆泵，高压空气喷口连接空压机，钻孔时，通过驱动机构驱动钻杆一边下压一边旋转，同时脉冲冲击机构提供脉冲式冲击力，进行高效钻进，钻至设计深度后，在钻杆缓慢提升并旋转的过程中，通过高压水泥浆喷嘴喷出水泥浆与高压气流共同作用切割地层，形成高喷防渗墙。本发明可以适用于高阻力地层钻喷一体化施工，在钻孔的同时直接喷射水泥浆，并通过高速气流和钻杆的旋转使水泥浆与地层物料搅拌均匀，直接形成高喷桩，施工效率高。
Rotary and impact drilling and spraying integrated high-pressure spraying process and device
一种回旋+冲击钻喷一体高喷工艺及装置
XIE WEIJIANG (author)
2021-02-26
Patent
Electronic Resource
Chinese
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