Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Dewatering construction method for ultra-deep foundation pit in sandy soil
The invention relates to a foundation pit dewatering construction method for an ultra-deep foundation pit in sandy soil. The method comprises the steps that well points are measured and positioned; digging a wellhead, and installing a pile casing; drilling in place; drilling holes; backfilling a well bottom sand cushion layer; hoisting a well pipe; backfilling the grit filter layer between the well casing and the hole wall; washing the well; a water pump and a water pumping control circuit are arranged in the well pipe; testing water pumping; the dewatering well works normally; covering a well lid; cleaning a construction site; rainfall management; the precipitation task is completed; and sealing the well. The foundation pit supporting system combining the supporting system and well point dewatering is more obvious in dewatering effect, and the repair cost caused by the poor water locking effect of the waterproof curtain in the later period can be effectively reduced. Due to the fact that the waterproof curtain does not need to be constructed, only the dewatering well needs to be constructed, the construction period can be effectively shortened, a long-arm spiral drilling machine needed by the waterproof curtain jet grouting pile does not need to enter a site, mechanical cost generated when machines enter the site is reduced, and cost is reduced.
本发明是一种砂土内超深基坑基坑降水施工方法，包括井点测量定位；挖井口、安护筒；钻孔就位；钻孔；回填井底砂垫层；吊放井管；回填井管与孔壁间的沙砾过滤层；洗井；井管内下设水泵、安装抽水控制电路；试抽水；降水井正常工作；盖井盖；清理施工现场；降水管理；降水任务完成；封井。用支护体系与井点降水结合的基坑支护体系降水效果更加明显，可有效减少后期因止水帷幕锁水效果不佳产生的返修成本。因不需要施工止水帷幕，仅需施工降水井，可有效缩短施工工期，且不需要止水帷幕旋喷桩所需长臂螺旋钻机进场，减少了机械进场所产生的机械费，减少成本。
Dewatering construction method for ultra-deep foundation pit in sandy soil
The invention relates to a foundation pit dewatering construction method for an ultra-deep foundation pit in sandy soil. The method comprises the steps that well points are measured and positioned; digging a wellhead, and installing a pile casing; drilling in place; drilling holes; backfilling a well bottom sand cushion layer; hoisting a well pipe; backfilling the grit filter layer between the well casing and the hole wall; washing the well; a water pump and a water pumping control circuit are arranged in the well pipe; testing water pumping; the dewatering well works normally; covering a well lid; cleaning a construction site; rainfall management; the precipitation task is completed; and sealing the well. The foundation pit supporting system combining the supporting system and well point dewatering is more obvious in dewatering effect, and the repair cost caused by the poor water locking effect of the waterproof curtain in the later period can be effectively reduced. Due to the fact that the waterproof curtain does not need to be constructed, only the dewatering well needs to be constructed, the construction period can be effectively shortened, a long-arm spiral drilling machine needed by the waterproof curtain jet grouting pile does not need to enter a site, mechanical cost generated when machines enter the site is reduced, and cost is reduced.
本发明是一种砂土内超深基坑基坑降水施工方法，包括井点测量定位；挖井口、安护筒；钻孔就位；钻孔；回填井底砂垫层；吊放井管；回填井管与孔壁间的沙砾过滤层；洗井；井管内下设水泵、安装抽水控制电路；试抽水；降水井正常工作；盖井盖；清理施工现场；降水管理；降水任务完成；封井。用支护体系与井点降水结合的基坑支护体系降水效果更加明显，可有效减少后期因止水帷幕锁水效果不佳产生的返修成本。因不需要施工止水帷幕，仅需施工降水井，可有效缩短施工工期，且不需要止水帷幕旋喷桩所需长臂螺旋钻机进场，减少了机械进场所产生的机械费，减少成本。
Dewatering construction method for ultra-deep foundation pit in sandy soil
一种砂土内超深基坑降水施工方法
TIAN YUDI (Autor:in) / WANG FEILONG (Autor:in) / LI BO (Autor:in) / HAN JIANAN (Autor:in)
07.04.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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