A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction method for rotary jet prefabricating of composite pile
The invention discloses a construction method for rotary jet grouting prefabricating of a composite pile, and relates to a pile foundation construction method. The method solves the problem that due to a narrow space between buildings or between a building and other boundary, a large pile foundation construction machine cannot enter a construction site, so that a pile foundation cannot be constructed. Rotary jet grouting drilling is performed by a rotary jet grouting drilling machine; rotary jet grouting of cement paste is performed in the drilling process of the rotary jet grouting drilling machine by a drill bit of the rotary jet grouting drilling machine, and part of fine-grained sand is discharged out of a hole at the bottom of the rotary jet grouting drilling machine along with the cement paste; the drill bit of the rotary jet grouting drilling machine is slowly lifted at a constant speed, and it is ensured that the lifting speed of the drill bit of the rotary jet grouting drilling machine is lower than a matched grouting amount until the drill bit of the rotary jet grouting drilling machine is completely lifted out of a drilled hole; a prefabricated pile is inserted in the drilled hole by a press or a vibration impact hammer, it is ensured that the pile continuously sinks in place, that is, the prefabricated pile sinks in the pile hole to an elevation state; and the cement paste is cured to form stone and cement so as to closely wrap the prefabricated pile to obtain the composite pile of cement soil and the prefabricated pile. The construction method is used for pilefoundation construction in a narrow space.
一种旋喷预制复合桩的施工方法，它涉及一种桩基础施工方法。本发明解决了建筑楼体之间、建筑物与其它边界之间空间窄小时，大型桩基施工机械无法进入施工现场，导致桩基无法施工的问题。采用旋喷钻机旋喷钻孔；旋喷钻机在钻孔过程中通过旋喷钻机钻头旋喷水泥浆，水泥浆使部分细颗粒的砂随着水泥浆排出旋喷钻机底部的孔；缓慢匀速提升旋喷钻机钻头，保证旋喷钻机钻头提升速度低于注浆量匹配，直到旋喷钻机钻头全部提升至钻孔外；通过压机或振冲锤在钻孔处安插预制桩，保证连续沉桩到位，即预制桩下沉桩孔至标高状态；水泥浆固结形成结石和胶结物，紧密的把预制桩包裹住，即水泥土与预制桩的复合桩体。本发明用于空间窄小时桩基础施工。
Construction method for rotary jet prefabricating of composite pile
The invention discloses a construction method for rotary jet grouting prefabricating of a composite pile, and relates to a pile foundation construction method. The method solves the problem that due to a narrow space between buildings or between a building and other boundary, a large pile foundation construction machine cannot enter a construction site, so that a pile foundation cannot be constructed. Rotary jet grouting drilling is performed by a rotary jet grouting drilling machine; rotary jet grouting of cement paste is performed in the drilling process of the rotary jet grouting drilling machine by a drill bit of the rotary jet grouting drilling machine, and part of fine-grained sand is discharged out of a hole at the bottom of the rotary jet grouting drilling machine along with the cement paste; the drill bit of the rotary jet grouting drilling machine is slowly lifted at a constant speed, and it is ensured that the lifting speed of the drill bit of the rotary jet grouting drilling machine is lower than a matched grouting amount until the drill bit of the rotary jet grouting drilling machine is completely lifted out of a drilled hole; a prefabricated pile is inserted in the drilled hole by a press or a vibration impact hammer, it is ensured that the pile continuously sinks in place, that is, the prefabricated pile sinks in the pile hole to an elevation state; and the cement paste is cured to form stone and cement so as to closely wrap the prefabricated pile to obtain the composite pile of cement soil and the prefabricated pile. The construction method is used for pilefoundation construction in a narrow space.
一种旋喷预制复合桩的施工方法，它涉及一种桩基础施工方法。本发明解决了建筑楼体之间、建筑物与其它边界之间空间窄小时，大型桩基施工机械无法进入施工现场，导致桩基无法施工的问题。采用旋喷钻机旋喷钻孔；旋喷钻机在钻孔过程中通过旋喷钻机钻头旋喷水泥浆，水泥浆使部分细颗粒的砂随着水泥浆排出旋喷钻机底部的孔；缓慢匀速提升旋喷钻机钻头，保证旋喷钻机钻头提升速度低于注浆量匹配，直到旋喷钻机钻头全部提升至钻孔外；通过压机或振冲锤在钻孔处安插预制桩，保证连续沉桩到位，即预制桩下沉桩孔至标高状态；水泥浆固结形成结石和胶结物，紧密的把预制桩包裹住，即水泥土与预制桩的复合桩体。本发明用于空间窄小时桩基础施工。
Construction method for rotary jet prefabricating of composite pile
一种旋喷预制复合桩的施工方法
ZHANG LIANBO (author) / WANG CHANGQING (author) / ZOU YANHUI (author) / SU JUNSHU (author) / YAN BIN (author)
2020-10-23
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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