Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bridge pile foundation treatment karst cave construction method under strong karst development geological condition
The invention discloses a bridge pile foundation treatment karst cave construction method under a karst strong development geological condition, which is characterized in that karst cave treatment construction is carried out based on a manual hole digging pile process, pile hole excavation adopts a reinforced concrete retaining wall, more than one layer of anchor bars or steel floral tubes are additionally arranged on the reinforced concrete retaining wall, and the reinforced concrete retaining wall is filled with concrete. The reinforced concrete retaining wall is anchored on the rock-soil body around the pile; and after the hollow karst cave section is excavated, corresponding treatment measures are taken according to the type and the size of the karst cave. According to the technical scheme, once treatment succeeds when the karst cave is encountered, repeated treatment is not needed, and the construction period is guaranteed. And the ultrahigh and large-span karst cave under the strong karst development condition can be quickly and effectively treated. By reinforcing the reinforced concrete retaining wall, the potential safety hazard of hole collapse in the excavation process of the pile foundation is effectively reduced, and meanwhile the quality problem of hole collapse or pile breakage caused by the fact that a covering layer is thick and seepage water of a rock stratum is soft in the pile core concrete pouring process is avoided. The construction progress is accelerated, the construction cost is saved, and the pile forming quality is improved.
本发明公开了一种岩溶强发育地质条件下桥梁桩基处理溶洞施工方法，其特征在于：基于人工挖孔桩工艺进行处理溶洞施工，桩孔开挖采用钢筋混凝土护壁，在钢筋混凝土护壁增设1层以上的锚筋或钢花管，将钢筋混凝土护壁锚定在桩周岩土体上；开挖到中空溶洞段后，根据溶洞类型和大小采取相应的处理措施本发明的技术方案，遇到溶洞时一次处理成功，不需要重复处理，工期有保障。能够快速有效的对岩溶强发育条件下超高、大跨度溶洞进行处理。通过加强钢筋混凝土护壁，有效降低桩基在开挖过程中塌孔的安全隐患，同时避免了在桩芯混凝土浇注过程中因覆盖层较厚，岩层渗水松软而导致塌孔或断桩的质量问题。加快了施工进度，节约了施工成本，提高成桩质量。
Bridge pile foundation treatment karst cave construction method under strong karst development geological condition
The invention discloses a bridge pile foundation treatment karst cave construction method under a karst strong development geological condition, which is characterized in that karst cave treatment construction is carried out based on a manual hole digging pile process, pile hole excavation adopts a reinforced concrete retaining wall, more than one layer of anchor bars or steel floral tubes are additionally arranged on the reinforced concrete retaining wall, and the reinforced concrete retaining wall is filled with concrete. The reinforced concrete retaining wall is anchored on the rock-soil body around the pile; and after the hollow karst cave section is excavated, corresponding treatment measures are taken according to the type and the size of the karst cave. According to the technical scheme, once treatment succeeds when the karst cave is encountered, repeated treatment is not needed, and the construction period is guaranteed. And the ultrahigh and large-span karst cave under the strong karst development condition can be quickly and effectively treated. By reinforcing the reinforced concrete retaining wall, the potential safety hazard of hole collapse in the excavation process of the pile foundation is effectively reduced, and meanwhile the quality problem of hole collapse or pile breakage caused by the fact that a covering layer is thick and seepage water of a rock stratum is soft in the pile core concrete pouring process is avoided. The construction progress is accelerated, the construction cost is saved, and the pile forming quality is improved.
本发明公开了一种岩溶强发育地质条件下桥梁桩基处理溶洞施工方法，其特征在于：基于人工挖孔桩工艺进行处理溶洞施工，桩孔开挖采用钢筋混凝土护壁，在钢筋混凝土护壁增设1层以上的锚筋或钢花管，将钢筋混凝土护壁锚定在桩周岩土体上；开挖到中空溶洞段后，根据溶洞类型和大小采取相应的处理措施本发明的技术方案，遇到溶洞时一次处理成功，不需要重复处理，工期有保障。能够快速有效的对岩溶强发育条件下超高、大跨度溶洞进行处理。通过加强钢筋混凝土护壁，有效降低桩基在开挖过程中塌孔的安全隐患，同时避免了在桩芯混凝土浇注过程中因覆盖层较厚，岩层渗水松软而导致塌孔或断桩的质量问题。加快了施工进度，节约了施工成本，提高成桩质量。
Bridge pile foundation treatment karst cave construction method under strong karst development geological condition
一种岩溶强发育地质条件下桥梁桩基处理溶洞施工方法
LIAO ZEJIANG (Autor:in) / PAN XUEHU (Autor:in) / HE MIANCHAO (Autor:in)
13.01.2023
Patent
Elektronische Ressource
Chinesisch
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