A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
CFG pile reinforcing construction method
The invention belongs to the field of CFG pile reinforcement, and provides a CFG pile reinforcement construction method which comprises the steps that the bottom of an embedded steel pipe is perforated or slotted, and inner and outer slurry surfaces are kept communicated; at the upper part of the implanted steel pipe, symmetrically arranging a plurality of twisted steel bars for reinforcement along the outer wall of the steel pipe from top to bottom to the depth of 1.8-2m; the steel bars and the steel pipes are connected by welding; a plurality of positioners are symmetrically arranged on the implanted steel pipe at intervals of 1.8-2m; positioning and paying off are conducted on the CFG pile to be reinforced, and then drilling is conducted; the implanted steel pipe is led into the bottom of the hole, and meanwhile the top face of the implanted steel pipe is flush with the top face of the original pile in height; cement paste is adopted for grouting in the drill hole, the water-cement ratio is 0.40-0.50, and the 28d compressive strength grade of cement paste stone is not less than 30Mpa. According to the method, the problem that the bearing capacity of the pile body of the CFG pile is insufficient is effectively solved, three groups of single-pile static load tests, four groups of single-pile composite foundation tests and pile body integrity detection are carried out on the reinforced CFG pile, and the national current standard and design detection requirements can be met.
本发明属于CFG桩加固领域，提供了一种CFG桩加固施工方法，包括：将植入钢管底部开孔或开槽，保持内外浆液面联通；在植入钢管上部，沿钢管外壁自顶向下至1.8～2m深度，对称布置多根螺纹钢筋补强；钢筋和钢管之间采用焊接连接；所述植入钢管每间隔1.8～2m设置定位器，定对称布置多个；对待加固的CFG桩进行定位放线，然后钻孔；将植入钢管通入到孔底，同时，使植入钢管顶面高度与原桩顶面高度齐平；钻孔内注浆采用水泥浆，水灰比为0.40～0.50，水泥浆结石28d抗压强度等级不小于30Mpa，养护，即得。本发明有效地解决了CFG桩桩身承载力不足的问题，对加固后CFG桩进行3组单桩静载荷试验、4组单桩复合地基试验，及桩身完整性检测，都能满足国家现行标准及设计检测要求。
CFG pile reinforcing construction method
The invention belongs to the field of CFG pile reinforcement, and provides a CFG pile reinforcement construction method which comprises the steps that the bottom of an embedded steel pipe is perforated or slotted, and inner and outer slurry surfaces are kept communicated; at the upper part of the implanted steel pipe, symmetrically arranging a plurality of twisted steel bars for reinforcement along the outer wall of the steel pipe from top to bottom to the depth of 1.8-2m; the steel bars and the steel pipes are connected by welding; a plurality of positioners are symmetrically arranged on the implanted steel pipe at intervals of 1.8-2m; positioning and paying off are conducted on the CFG pile to be reinforced, and then drilling is conducted; the implanted steel pipe is led into the bottom of the hole, and meanwhile the top face of the implanted steel pipe is flush with the top face of the original pile in height; cement paste is adopted for grouting in the drill hole, the water-cement ratio is 0.40-0.50, and the 28d compressive strength grade of cement paste stone is not less than 30Mpa. According to the method, the problem that the bearing capacity of the pile body of the CFG pile is insufficient is effectively solved, three groups of single-pile static load tests, four groups of single-pile composite foundation tests and pile body integrity detection are carried out on the reinforced CFG pile, and the national current standard and design detection requirements can be met.
本发明属于CFG桩加固领域，提供了一种CFG桩加固施工方法，包括：将植入钢管底部开孔或开槽，保持内外浆液面联通；在植入钢管上部，沿钢管外壁自顶向下至1.8～2m深度，对称布置多根螺纹钢筋补强；钢筋和钢管之间采用焊接连接；所述植入钢管每间隔1.8～2m设置定位器，定对称布置多个；对待加固的CFG桩进行定位放线，然后钻孔；将植入钢管通入到孔底，同时，使植入钢管顶面高度与原桩顶面高度齐平；钻孔内注浆采用水泥浆，水灰比为0.40～0.50，水泥浆结石28d抗压强度等级不小于30Mpa，养护，即得。本发明有效地解决了CFG桩桩身承载力不足的问题，对加固后CFG桩进行3组单桩静载荷试验、4组单桩复合地基试验，及桩身完整性检测，都能满足国家现行标准及设计检测要求。
CFG pile reinforcing construction method
CFG桩加固施工方法
WANG SHUJIANG (author) / FU JUN (author) / SONG LIXI (author) / YANG PENG (author)
2023-04-07
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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