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A platform for research: civil engineering, architecture and urbanism
Construction method of bridge pile foundation of flow plastic semi-filled karst cave
The invention relates to the technical field of bridge engineering, in particular to a construction method of a bridge pile foundation of a flow plastic semi-filled karst cave, which comprises the following steps: S1, drilling by a percussion drill, penetrating a karst cave top plate through a low hammer in a buffering manner, and penetrating a steel casing through a bad stratum to a stable layer when the bad stratum exists; s2, clay bags and rubbles are thrown and filled in the karst cave to be tamped, the bottom of the karst cave is leveled, and the clay rubbles are used for replacing and reinforcing karst cave filler; s3, concrete is poured into the karst cave, the lifting speed of the guide pipe is controlled, and the karst cave is filled with the concrete and the bottom clay rubble dynamic compaction layer; s4, continuously punching to the designed elevation of the pile bottom, and repeating the steps S2 to S3 when a plurality of layers of karst caves are encountered; and S5, lowering a reinforcement cage, and pouring concrete to form a pile foundation. According to the construction method of the bridge pile foundation of the flow plastic semi-filled karst cave, the filling materials in the karst cave are replaced and reinforced according to the riprap silt squeezing and dynamic compaction reinforcing principle, the common situation can be dealt with, standardized operation is facilitated, and the on-site safety is guaranteed.
本发明涉及桥梁工程技术领域，具体涉及了一种流塑状半填充溶洞的桥梁桩基的施工方法，包括以下步骤：S1，冲击钻开孔，低锤缓冲穿透溶洞顶板，当存在不良地质时，钢护筒应穿过不良地层至稳定层；S2，溶洞内抛填粘土袋和片石夯实，找平溶洞底，并利用粘土片石置换、加固溶洞填充物；S3，溶洞内灌注混凝土，控制导管提升速度，使混凝土与底部粘土片石强夯层填充溶洞；S4，继续冲孔至桩底设计标高，当遇到多层溶洞时，重复上述S2到S3；S5，下钢筋笼，灌注混凝土形成桩基。本发明的流塑状半填充溶洞的桥梁桩基的施工方法利用抛石挤淤和强夯加固原理，置换并加固溶洞内填充物，能够应对普遍情况，利于标准化作业，利于现场安全的保证。
Construction method of bridge pile foundation of flow plastic semi-filled karst cave
The invention relates to the technical field of bridge engineering, in particular to a construction method of a bridge pile foundation of a flow plastic semi-filled karst cave, which comprises the following steps: S1, drilling by a percussion drill, penetrating a karst cave top plate through a low hammer in a buffering manner, and penetrating a steel casing through a bad stratum to a stable layer when the bad stratum exists; s2, clay bags and rubbles are thrown and filled in the karst cave to be tamped, the bottom of the karst cave is leveled, and the clay rubbles are used for replacing and reinforcing karst cave filler; s3, concrete is poured into the karst cave, the lifting speed of the guide pipe is controlled, and the karst cave is filled with the concrete and the bottom clay rubble dynamic compaction layer; s4, continuously punching to the designed elevation of the pile bottom, and repeating the steps S2 to S3 when a plurality of layers of karst caves are encountered; and S5, lowering a reinforcement cage, and pouring concrete to form a pile foundation. According to the construction method of the bridge pile foundation of the flow plastic semi-filled karst cave, the filling materials in the karst cave are replaced and reinforced according to the riprap silt squeezing and dynamic compaction reinforcing principle, the common situation can be dealt with, standardized operation is facilitated, and the on-site safety is guaranteed.
本发明涉及桥梁工程技术领域，具体涉及了一种流塑状半填充溶洞的桥梁桩基的施工方法，包括以下步骤：S1，冲击钻开孔，低锤缓冲穿透溶洞顶板，当存在不良地质时，钢护筒应穿过不良地层至稳定层；S2，溶洞内抛填粘土袋和片石夯实，找平溶洞底，并利用粘土片石置换、加固溶洞填充物；S3，溶洞内灌注混凝土，控制导管提升速度，使混凝土与底部粘土片石强夯层填充溶洞；S4，继续冲孔至桩底设计标高，当遇到多层溶洞时，重复上述S2到S3；S5，下钢筋笼，灌注混凝土形成桩基。本发明的流塑状半填充溶洞的桥梁桩基的施工方法利用抛石挤淤和强夯加固原理，置换并加固溶洞内填充物，能够应对普遍情况，利于标准化作业，利于现场安全的保证。
Construction method of bridge pile foundation of flow plastic semi-filled karst cave
一种流塑状半填充溶洞的桥梁桩基的施工方法
LIU XIAOGANG (author) / LIU CHUNZHENG (author) / XU JIAHUI (author) / YANG YUKUI (author) / ZHENG YUAN (author) / RAO HAOMIAO (author)
2023-06-30
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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