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A platform for research: civil engineering, architecture and urbanism
Construction method for prefabricated assembly type bilge well in water-rich dense sand layer
The invention provides a construction method for a prefabricated assembly type bilge well in a water-rich dense sand layer, and relates to the technical field of bilge well construction, which comprises the following steps of: constructing a steel shaft by adopting an assembly type self-counterweight hydraulic immersed tube device in a sectional pressing and section-by-section lengthening manner until the steel shaft is pressed to a designed elevation; in the dense sand layer, a soil body is cut and crushed through ultrahigh-pressure water flow, a drilling crushing interval is planned and arranged according to the hole site diameter, the dense sand layer is divided into N layers, and soil cutting and crushing are conducted layer by layer; high-pressure mud suction, dewatering and slurry outward transportation are synchronously carried out, and after the steel shaft body sinks in place, high-pressure grouting reinforcement is carried out on a soil body on the lower portion of a blade foot of the shaft body; according to the technology, the technology that steel shaft sinking and pressing, ultrahigh-pressure water flow soil cutting and mud suction dewatering are combined is adopted, mechanical well sinking in the water-rich dense sand layer is achieved, traditional manual soil cutting and self-weight sinking processes are replaced, the well forming precision is improved, and the construction efficiency and safety are improved.
本发明提供了富水密实砂层中预制装配式污水井施工方法，涉及污水井施工技术领域，包括以下步骤：采用拼装式自配重液压沉管设备通过分段压入、逐段接长的方式对钢井筒进行施工，直至将钢井筒压至设计标高；在密实砂层，通过超高压力水流切割破碎土体，钻孔破碎区间按孔位直径搭规划布置，将密实砂层分为N层，逐层进行切土破碎；同步进行高压吸泥、降水以及泥浆外运，待钢井筒体下沉到位后，对井体刃脚下部土体进行高压注浆加固；本发明采用拼装式自配重液压井筒沉压设备沉压钢井筒、超高压水流切土以及吸泥降水，三者组合的技术，实现了在富水密实砂层中机械化沉井，代替传统的人工挖土、自重下沉工艺，提高成井的精度，提高施工效率和安全性。
Construction method for prefabricated assembly type bilge well in water-rich dense sand layer
The invention provides a construction method for a prefabricated assembly type bilge well in a water-rich dense sand layer, and relates to the technical field of bilge well construction, which comprises the following steps of: constructing a steel shaft by adopting an assembly type self-counterweight hydraulic immersed tube device in a sectional pressing and section-by-section lengthening manner until the steel shaft is pressed to a designed elevation; in the dense sand layer, a soil body is cut and crushed through ultrahigh-pressure water flow, a drilling crushing interval is planned and arranged according to the hole site diameter, the dense sand layer is divided into N layers, and soil cutting and crushing are conducted layer by layer; high-pressure mud suction, dewatering and slurry outward transportation are synchronously carried out, and after the steel shaft body sinks in place, high-pressure grouting reinforcement is carried out on a soil body on the lower portion of a blade foot of the shaft body; according to the technology, the technology that steel shaft sinking and pressing, ultrahigh-pressure water flow soil cutting and mud suction dewatering are combined is adopted, mechanical well sinking in the water-rich dense sand layer is achieved, traditional manual soil cutting and self-weight sinking processes are replaced, the well forming precision is improved, and the construction efficiency and safety are improved.
本发明提供了富水密实砂层中预制装配式污水井施工方法，涉及污水井施工技术领域，包括以下步骤：采用拼装式自配重液压沉管设备通过分段压入、逐段接长的方式对钢井筒进行施工，直至将钢井筒压至设计标高；在密实砂层，通过超高压力水流切割破碎土体，钻孔破碎区间按孔位直径搭规划布置，将密实砂层分为N层，逐层进行切土破碎；同步进行高压吸泥、降水以及泥浆外运，待钢井筒体下沉到位后，对井体刃脚下部土体进行高压注浆加固；本发明采用拼装式自配重液压井筒沉压设备沉压钢井筒、超高压水流切土以及吸泥降水，三者组合的技术，实现了在富水密实砂层中机械化沉井，代替传统的人工挖土、自重下沉工艺，提高成井的精度，提高施工效率和安全性。
Construction method for prefabricated assembly type bilge well in water-rich dense sand layer
富水密实砂层中预制装配式污水井施工方法
LI HAIHONG (author) / LI YUMEI (author)
2024-08-13
Patent
Electronic Resource
Chinese
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