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Squeezing and expanding bearing disc cast-in-place pile and construction method thereof
The construction method comprises the steps that pile positioning and paying off are conducted, a pile machine is in place, pile holes are squeezed and expanded through a static pressure sleeve, the static pressure sleeve comprises an outer pile pipe and an inner pile pipe, the inner pile pipe is arranged in the outer pile pipe, the diameter of the inner pile pipe is smaller than that of the outer pile pipe, and the bottom end of the inner pile pipe is a closed squeezing end; the construction method comprises the following operation steps of: A, after extrusion and expansion are started, firstly, pressing and sinking a static pressure sleeve to the designed elevation of a bearing disc, and after the static pressure sleeve is pressed and expanded to the designed elevation of the bearing disc, pouring flowable concrete into an outer pile pipe or pouring the flowable concrete while pulling out the outer pile pipe, and jolt-ramming until the flowable concrete is poured to the designed elevation, thus completing the construction step of extruding and expanding the bearing disc cast-in-place pile; b, extruding and expanding to form a bearing disc; c, the static pressure casing pipe penetrates through the force bearing disc and then sinks to the designed elevation; the force bearing disc extrudes a soil body at the position in the extrusion and expansion process, the strength of the soil body is enhanced, and the bearing capacity of the soil body in unit area is improved.
本发明公开了一种挤扩承力盘灌注桩及其施工方法，施工方法包括桩定位放线、桩机就位，用包括外桩管和设置于外桩管内部直径小于外桩管的内桩管且内桩管的底端为封闭的挤压端的静压套管进行挤扩桩孔，提出内桩管，在外桩管内灌注流动性混凝土或边拔外桩管边灌注流动性混凝土，并震实，直至灌至设计标高处完成挤扩承力盘灌注桩的施工步骤，还包括如下操作步骤：A、在开始挤扩后，先将静压套管压沉至承力盘设计标高；B、挤扩形成承力盘；C、静压套管穿过承力盘后沉至设计标高；本发明承力盘在挤扩过程中对该处的土体进行挤压，增强了土体的强度，提高了土体单位面积的承载能力。
Squeezing and expanding bearing disc cast-in-place pile and construction method thereof
The construction method comprises the steps that pile positioning and paying off are conducted, a pile machine is in place, pile holes are squeezed and expanded through a static pressure sleeve, the static pressure sleeve comprises an outer pile pipe and an inner pile pipe, the inner pile pipe is arranged in the outer pile pipe, the diameter of the inner pile pipe is smaller than that of the outer pile pipe, and the bottom end of the inner pile pipe is a closed squeezing end; the construction method comprises the following operation steps of: A, after extrusion and expansion are started, firstly, pressing and sinking a static pressure sleeve to the designed elevation of a bearing disc, and after the static pressure sleeve is pressed and expanded to the designed elevation of the bearing disc, pouring flowable concrete into an outer pile pipe or pouring the flowable concrete while pulling out the outer pile pipe, and jolt-ramming until the flowable concrete is poured to the designed elevation, thus completing the construction step of extruding and expanding the bearing disc cast-in-place pile; b, extruding and expanding to form a bearing disc; c, the static pressure casing pipe penetrates through the force bearing disc and then sinks to the designed elevation; the force bearing disc extrudes a soil body at the position in the extrusion and expansion process, the strength of the soil body is enhanced, and the bearing capacity of the soil body in unit area is improved.
本发明公开了一种挤扩承力盘灌注桩及其施工方法，施工方法包括桩定位放线、桩机就位，用包括外桩管和设置于外桩管内部直径小于外桩管的内桩管且内桩管的底端为封闭的挤压端的静压套管进行挤扩桩孔，提出内桩管，在外桩管内灌注流动性混凝土或边拔外桩管边灌注流动性混凝土，并震实，直至灌至设计标高处完成挤扩承力盘灌注桩的施工步骤，还包括如下操作步骤：A、在开始挤扩后，先将静压套管压沉至承力盘设计标高；B、挤扩形成承力盘；C、静压套管穿过承力盘后沉至设计标高；本发明承力盘在挤扩过程中对该处的土体进行挤压，增强了土体的强度，提高了土体单位面积的承载能力。
Squeezing and expanding bearing disc cast-in-place pile and construction method thereof
一种挤扩承力盘灌注桩及其施工方法
ZHANG LIJUN (author) / ZHANG BO (author)
2023-08-08
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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