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A platform for research: civil engineering, architecture and urbanism
High-pressure-bearing circular deep foundation pit structure suitable for water-rich sand gravel layer and construction method thereof
The invention relates to a high-pressure-bearing circular deep foundation pit structure suitable for a water-rich sand gravel layer. The high-pressure-bearing circular deep foundation pit structure comprises a circular foundation pit and a diaphragm wall which is arranged along the side wall of the foundation pit, the diaphragm wall comprises a plurality of groove sections sequentially arranged inthe circular direction and concrete which is poured in the groove sections, and each groove section is clamped into a groove opening of the adjacent groove section. The invention further provides a construction method of the high-pressure-bearing circular deep foundation pit suitable for the water-rich sand gravel layer. The construction method comprises the steps of S1, S2, S3, S4, S5 and S6. According to the high-pressure-bearing circular deep foundation pit structure suitable for the water-rich sand gravel layer, the circular diaphragm wall is arranged, the arch effect of a cylindrical structure is fully utilized, all groove sections of the diaphragm wall are mutually extruded and restrained to form an integral combined effect, the deep foundation pit structure is suitable for foundation pit engineering in which the excavation depth is large, and the confined aquifer thickness is large and the burial depth is large, so that a waterproof curtain difficultly penetrates through a confined aquifer, by the adoption of the underwater excavation mode of the circular foundation pit, the on-site construction efficiency can be effectively improved, sudden surging of the base is prevented, the stress and deformation state of the diaphragm wall can be improved, the excavation safety of the foundation pit is guaranteed, and the excavation progress of the foundation pit is accelerated.
本发明涉及一种适用于富水砂卵层高承压圆形深基坑结构，包括圆形的基坑以及沿基坑的侧壁布设的地连墙，地连墙包括沿圆形方向依次布设的多个槽段以及浇筑于槽段中的混凝土，每一槽段卡进与其相邻的槽段的槽口中。还提供一种适用于富水砂卵层高承压圆形深基坑的施工方法，包括步骤S1‑S6。本发明通过设置圆形的地连墙，充分利用了圆筒形结构的“拱效应”，使地连墙的各槽段相互挤压约束形成整体共同作用，适于开挖深度大、承压含水层厚度及埋深均极大而导致隔水帷幕难以穿透承压含水层的基坑工程，采用圆形基坑的水下开挖方式可有效提高现场施工效率、防止基底突涌的发生，能改善地连墙的受力与变形状态，保证了基坑的开挖安全，提高了基坑的开挖进度。
High-pressure-bearing circular deep foundation pit structure suitable for water-rich sand gravel layer and construction method thereof
The invention relates to a high-pressure-bearing circular deep foundation pit structure suitable for a water-rich sand gravel layer. The high-pressure-bearing circular deep foundation pit structure comprises a circular foundation pit and a diaphragm wall which is arranged along the side wall of the foundation pit, the diaphragm wall comprises a plurality of groove sections sequentially arranged inthe circular direction and concrete which is poured in the groove sections, and each groove section is clamped into a groove opening of the adjacent groove section. The invention further provides a construction method of the high-pressure-bearing circular deep foundation pit suitable for the water-rich sand gravel layer. The construction method comprises the steps of S1, S2, S3, S4, S5 and S6. According to the high-pressure-bearing circular deep foundation pit structure suitable for the water-rich sand gravel layer, the circular diaphragm wall is arranged, the arch effect of a cylindrical structure is fully utilized, all groove sections of the diaphragm wall are mutually extruded and restrained to form an integral combined effect, the deep foundation pit structure is suitable for foundation pit engineering in which the excavation depth is large, and the confined aquifer thickness is large and the burial depth is large, so that a waterproof curtain difficultly penetrates through a confined aquifer, by the adoption of the underwater excavation mode of the circular foundation pit, the on-site construction efficiency can be effectively improved, sudden surging of the base is prevented, the stress and deformation state of the diaphragm wall can be improved, the excavation safety of the foundation pit is guaranteed, and the excavation progress of the foundation pit is accelerated.
本发明涉及一种适用于富水砂卵层高承压圆形深基坑结构，包括圆形的基坑以及沿基坑的侧壁布设的地连墙，地连墙包括沿圆形方向依次布设的多个槽段以及浇筑于槽段中的混凝土，每一槽段卡进与其相邻的槽段的槽口中。还提供一种适用于富水砂卵层高承压圆形深基坑的施工方法，包括步骤S1‑S6。本发明通过设置圆形的地连墙，充分利用了圆筒形结构的“拱效应”，使地连墙的各槽段相互挤压约束形成整体共同作用，适于开挖深度大、承压含水层厚度及埋深均极大而导致隔水帷幕难以穿透承压含水层的基坑工程，采用圆形基坑的水下开挖方式可有效提高现场施工效率、防止基底突涌的发生，能改善地连墙的受力与变形状态，保证了基坑的开挖安全，提高了基坑的开挖进度。
High-pressure-bearing circular deep foundation pit structure suitable for water-rich sand gravel layer and construction method thereof
适用于富水砂卵层高承压圆形深基坑结构及其施工方法
SONG JIANYU (author) / WANG JINLONG (author) / ZHANG LIREN (author) / LYU YANHAO (author) / ZHANG HAITAO (author) / ZHENG KAI (author) / YOU LONGFEI (author)
2020-10-30
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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