Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Rotary excavating cast-in-place pile collapsed hole underpinning device and underpinning construction method
The invention provides a rotary excavating cast-in-place pile collapse hole underpinning device, and relates to the technical field of pile hole replacement construction, the rotary excavating cast-in-place pile collapse hole underpinning device comprises a steel casing, a gap h is formed between the outer wall of the steel casing and the hole wall of a pile hole, a top cover is fixed at one end of the steel casing, and a hanging structure is fixed on the top cover; and a plurality of centering brackets are arranged, and the plurality of centering brackets are distributed along the circumferential direction of the steel casing at equal intervals. The invention further provides a rotary excavating cast-in-place pile collapse hole underpinning construction method which comprises the following steps that S1, the steel casing is hoisted into a pile hole and lowered to a collapse hole area, the centering support is located above the collapse hole area, and the seam stopping plug is located below the collapse hole area and blocks a gap h between the steel casing and the hole wall; s2, pouring replacement concrete into a gap h between the steel casing and the hole wall; and S3, after the replacement concrete reaches the preset strength, the steel casing is pulled out of the pile hole. According to the method, secondary hole collapse after support replacement can be avoided, the problem of pile casing burying can be avoided, the concrete replacement amount is reduced, and the construction cost is reduced.
本发明提供一种旋挖灌注桩塌孔托换装置，涉及桩孔换填施工技术领域，其包括：钢护筒，该钢护筒的外壁与桩孔孔壁之间具有间隙h，该钢护筒一端固定有顶罩，该顶罩固定有吊挂结构；对中支架，该对中支架设有若干个，若干该对中支架沿该钢护筒周向等间隔分布。本发明还提供一种旋挖灌注桩塌孔托换施工方法，其包括以下步骤：S1将钢护筒吊入桩孔并下放至塌孔区，对中支架位于塌孔区上方，止缝塞位于塌孔区下方并封堵钢护筒与孔壁之间的间隙h；S2向钢护筒与孔壁之间的间隙h中浇筑换填混凝土；S3当换填混凝土达到预定强度后，将钢护筒拔出桩孔。本发明能够避免换托后出现二次塌孔，能够避免出现埋护筒的问题，减少混凝土换填量，降低施工成本。
Rotary excavating cast-in-place pile collapsed hole underpinning device and underpinning construction method
The invention provides a rotary excavating cast-in-place pile collapse hole underpinning device, and relates to the technical field of pile hole replacement construction, the rotary excavating cast-in-place pile collapse hole underpinning device comprises a steel casing, a gap h is formed between the outer wall of the steel casing and the hole wall of a pile hole, a top cover is fixed at one end of the steel casing, and a hanging structure is fixed on the top cover; and a plurality of centering brackets are arranged, and the plurality of centering brackets are distributed along the circumferential direction of the steel casing at equal intervals. The invention further provides a rotary excavating cast-in-place pile collapse hole underpinning construction method which comprises the following steps that S1, the steel casing is hoisted into a pile hole and lowered to a collapse hole area, the centering support is located above the collapse hole area, and the seam stopping plug is located below the collapse hole area and blocks a gap h between the steel casing and the hole wall; s2, pouring replacement concrete into a gap h between the steel casing and the hole wall; and S3, after the replacement concrete reaches the preset strength, the steel casing is pulled out of the pile hole. According to the method, secondary hole collapse after support replacement can be avoided, the problem of pile casing burying can be avoided, the concrete replacement amount is reduced, and the construction cost is reduced.
本发明提供一种旋挖灌注桩塌孔托换装置，涉及桩孔换填施工技术领域，其包括：钢护筒，该钢护筒的外壁与桩孔孔壁之间具有间隙h，该钢护筒一端固定有顶罩，该顶罩固定有吊挂结构；对中支架，该对中支架设有若干个，若干该对中支架沿该钢护筒周向等间隔分布。本发明还提供一种旋挖灌注桩塌孔托换施工方法，其包括以下步骤：S1将钢护筒吊入桩孔并下放至塌孔区，对中支架位于塌孔区上方，止缝塞位于塌孔区下方并封堵钢护筒与孔壁之间的间隙h；S2向钢护筒与孔壁之间的间隙h中浇筑换填混凝土；S3当换填混凝土达到预定强度后，将钢护筒拔出桩孔。本发明能够避免换托后出现二次塌孔，能够避免出现埋护筒的问题，减少混凝土换填量，降低施工成本。
Rotary excavating cast-in-place pile collapsed hole underpinning device and underpinning construction method
旋挖灌注桩塌孔托换装置及换托施工方法
15.04.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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