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A platform for research: civil engineering, architecture and urbanism
Soft foundation treatment dry vibro-replacement gravel pile and construction method thereof
The invention relates to the technical field of foundation treatment, in particular to a soft foundation treatment dry vibro-replacement gravel pile and a construction method thereof. The gravel pileis good in bearing capacity, avoids foundation settlement and is environmental-friendly, the gravel pile is composed of a sand bag group and a gravel column, and the construction method comprises thesteps of sand bag group manufacturing, immersed tube driving, sand bag group lowering, hole extruding and expanding forming, gravel column segmented filling, gravel column pile body forming and pile top cushion layer laying, wherein the sand bag group is arranged on the periphery of the gravel column, the sand bag group and an immersed tube are driven into a soft foundation through a bagged sand well construction technology, then an extrusion-expansion steel pipe is inserted into the middle of the sand bag group, the extrusion-expansion steel pipe is spirally pulled out after the extrusion-expansion steel pipe is inserted, then a vibroflot is placed in a formed extrusion-expansion hole, high-pressure water jet impact operation is not needed, gravels are poured into the extrusion-expansionhole, the vibroflot is started, finally, the gravel column is formed through segmented vibration, and a gravel cushion layer is arranged at a pile top.
本发明涉及地基处理的技术领域，具体为用于软基处理的干式振冲碎石桩及其施工方法，其承载力好，避免地基沉降且利于环保；碎石桩由砂袋群和碎石柱组成，施工方法包括砂袋群制作、打设沉管、下放砂袋群、挤扩孔洞形成、分段填筑碎石柱、形成碎石柱桩体、桩顶铺设垫层，其中砂袋群设置在碎石柱周边，采用袋装砂井的施工工艺将砂袋群和沉管打入到软弱地基中，然后在砂袋群中间位置处插入挤扩钢管，插入挤扩钢管后螺旋拔出挤扩钢管，然后在所形成的挤扩孔洞中放入振冲器，无需进行高压水喷射冲击作业，在挤扩孔洞中倒入碎石，开启振冲器，最终分段振动成碎石柱，并在桩顶设置砂石垫层。
Soft foundation treatment dry vibro-replacement gravel pile and construction method thereof
The invention relates to the technical field of foundation treatment, in particular to a soft foundation treatment dry vibro-replacement gravel pile and a construction method thereof. The gravel pileis good in bearing capacity, avoids foundation settlement and is environmental-friendly, the gravel pile is composed of a sand bag group and a gravel column, and the construction method comprises thesteps of sand bag group manufacturing, immersed tube driving, sand bag group lowering, hole extruding and expanding forming, gravel column segmented filling, gravel column pile body forming and pile top cushion layer laying, wherein the sand bag group is arranged on the periphery of the gravel column, the sand bag group and an immersed tube are driven into a soft foundation through a bagged sand well construction technology, then an extrusion-expansion steel pipe is inserted into the middle of the sand bag group, the extrusion-expansion steel pipe is spirally pulled out after the extrusion-expansion steel pipe is inserted, then a vibroflot is placed in a formed extrusion-expansion hole, high-pressure water jet impact operation is not needed, gravels are poured into the extrusion-expansionhole, the vibroflot is started, finally, the gravel column is formed through segmented vibration, and a gravel cushion layer is arranged at a pile top.
本发明涉及地基处理的技术领域，具体为用于软基处理的干式振冲碎石桩及其施工方法，其承载力好，避免地基沉降且利于环保；碎石桩由砂袋群和碎石柱组成，施工方法包括砂袋群制作、打设沉管、下放砂袋群、挤扩孔洞形成、分段填筑碎石柱、形成碎石柱桩体、桩顶铺设垫层，其中砂袋群设置在碎石柱周边，采用袋装砂井的施工工艺将砂袋群和沉管打入到软弱地基中，然后在砂袋群中间位置处插入挤扩钢管，插入挤扩钢管后螺旋拔出挤扩钢管，然后在所形成的挤扩孔洞中放入振冲器，无需进行高压水喷射冲击作业，在挤扩孔洞中倒入碎石，开启振冲器，最终分段振动成碎石柱，并在桩顶设置砂石垫层。
Soft foundation treatment dry vibro-replacement gravel pile and construction method thereof
用于软基处理的干式振冲碎石桩及其施工方法
WANG XINQUAN (author)
2021-02-12
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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