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Long spiral double-pipe high-pressure stirring and spraying pile construction device and construction method thereof
According to the long-spiral double-pipe high-pressure stirring and spraying pile construction device, a water spraying nozzle is rotatably arranged on the side wall of a drill rod, a co-acting mechanism, an elastic assembly and a detection rod are further arranged in the drill rod, the top of the detection rod penetrates through the elastic assembly and then is fixedly connected with the co-acting mechanism, and the co-acting mechanism can be matched with the end, away from a water spraying opening, of the water spraying nozzle; the bottom of the detection rod axially penetrates through the drill bit and then can make contact with the bottom face of a pile hole, the water spray nozzle has a first position and a second position, and when the water spray nozzle is located at the first position, water flow sprayed by the water spray nozzle falls on the side wall of the pile hole and is located on the outer side of the outer diameter of the stirring blade. When the water spray nozzle is located at the second position, the sprayed water flow falls on the bottom surface of the pile hole and is located outside the outer diameter of the drill bit. The water spray nozzle in the design can be automatically switched between a diameter expanding state and a rock breaking state according to the hardness property of a soil layer in the drilling process of the drill bit, the diameter expanding effect during rock stratum drilling can be enhanced, abrasion to the stirring blades can be reduced, and the service life of the stirring blades can be prolonged.
一种长螺旋二重管高压搅喷桩施工装置中，喷水嘴可转动的设置在钻杆侧壁上，钻杆内部还设置有同动机构、弹性组件、探测杆，探测杆的顶部穿过弹性组件后与同动机构固定连接，同动机构可与喷水嘴上远离喷水口的一端相配合，探测杆的底部轴向穿过钻头后可与桩孔底面相接触，喷水嘴具有第一位置、第二位置，喷水嘴处于第一位置时其喷出的水流落点在桩孔侧壁上且位于搅拌叶片外径的外侧，喷水嘴处于第二位置时其喷出的水流落点在桩孔底面上且位于钻头外径的外侧。本设计中的喷水嘴能够在钻头钻进过程中根据土层软硬性质自主在扩径状态和破岩状态之间切换，不仅能加强岩层钻进时扩径效果，还能降低对搅拌叶片磨损，提高其使用寿命。
Long spiral double-pipe high-pressure stirring and spraying pile construction device and construction method thereof
According to the long-spiral double-pipe high-pressure stirring and spraying pile construction device, a water spraying nozzle is rotatably arranged on the side wall of a drill rod, a co-acting mechanism, an elastic assembly and a detection rod are further arranged in the drill rod, the top of the detection rod penetrates through the elastic assembly and then is fixedly connected with the co-acting mechanism, and the co-acting mechanism can be matched with the end, away from a water spraying opening, of the water spraying nozzle; the bottom of the detection rod axially penetrates through the drill bit and then can make contact with the bottom face of a pile hole, the water spray nozzle has a first position and a second position, and when the water spray nozzle is located at the first position, water flow sprayed by the water spray nozzle falls on the side wall of the pile hole and is located on the outer side of the outer diameter of the stirring blade. When the water spray nozzle is located at the second position, the sprayed water flow falls on the bottom surface of the pile hole and is located outside the outer diameter of the drill bit. The water spray nozzle in the design can be automatically switched between a diameter expanding state and a rock breaking state according to the hardness property of a soil layer in the drilling process of the drill bit, the diameter expanding effect during rock stratum drilling can be enhanced, abrasion to the stirring blades can be reduced, and the service life of the stirring blades can be prolonged.
一种长螺旋二重管高压搅喷桩施工装置中，喷水嘴可转动的设置在钻杆侧壁上，钻杆内部还设置有同动机构、弹性组件、探测杆，探测杆的顶部穿过弹性组件后与同动机构固定连接，同动机构可与喷水嘴上远离喷水口的一端相配合，探测杆的底部轴向穿过钻头后可与桩孔底面相接触，喷水嘴具有第一位置、第二位置，喷水嘴处于第一位置时其喷出的水流落点在桩孔侧壁上且位于搅拌叶片外径的外侧，喷水嘴处于第二位置时其喷出的水流落点在桩孔底面上且位于钻头外径的外侧。本设计中的喷水嘴能够在钻头钻进过程中根据土层软硬性质自主在扩径状态和破岩状态之间切换，不仅能加强岩层钻进时扩径效果，还能降低对搅拌叶片磨损，提高其使用寿命。
Long spiral double-pipe high-pressure stirring and spraying pile construction device and construction method thereof
一种长螺旋二重管高压搅喷桩施工装置及其施工方法
YAO QINGSONG (author) / CHENG JUNSONG (author) / PENG TAO (author) / SUN ANDONG (author) / HAN TAO (author) / GENG SHUAI (author)
2023-11-10
Patent
Electronic Resource
Chinese
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