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Bag type slowly-changing isolation type anti-drag cast-in-place pile and construction method thereof
The invention discloses a bag type slowly-changing isolation type anti-drag cast-in-place pile and a construction method thereof, and belongs to the technical field of pile foundation construction, the bag type slowly-changing isolation type anti-drag cast-in-place pile comprises a reinforcement cage, an isolation membrane, a supporting membrane, a reinforcing membrane and an isolation bag, the isolation membrane, the supporting membrane and the reinforcing membrane are bonded to form an integral composite membrane structure, and the isolation bag is connected with the reinforcing membrane through bonding. The width of the isolation bag after grouting is larger than the distance between the reinforcement cage and the in-situ soil body, the concrete is poured in the composite membrane structure and expands to form a cylindrical structure, and the tensile strength of the material of the isolation membrane is far smaller than the bonding strength between the isolation membrane and the supporting membrane and far smaller than the bonding strength between the isolation membrane and the outer surface of the cast-in-place pile. The construction method comprises the following steps: forming holes in the cast-in-place pile; lowering a reinforcement cage; grouting the isolation bag; and pouring concrete. The surface of the cast-in-place pile is covered with the composite film structure, so that the problem that the pile foundation is affected by settlement in the construction process of a soft soil area or a soil filling area and after construction is solved.
本发明公开了一种囊式缓变隔离型减阻灌注桩及其施工方法，属于桩基施工技术领域，包括钢筋笼、隔离膜、支撑膜、增强膜、隔离囊袋，隔离膜、支撑膜和增强膜三者粘结形成整体复合膜结构，隔离囊袋通过粘结与增强膜连接，隔离囊袋注浆后宽度大于钢筋笼与原位土体之间的距离，混凝土浇筑在复合膜结构内，并膨胀成圆柱状结构，隔离膜的材料自身抗拉强度远小于隔离膜与支撑膜之间的粘结强度且远小于隔离膜与灌注桩外表面的粘结强度。施工时按照如下方法操作：灌注桩成孔；下放钢筋笼；隔离囊袋注浆；混凝土浇筑。本发明通过在灌注桩表面覆盖复合膜结构进而达到消除软土地区或者填土地区施工过程中及工后沉降对桩基础影响的问题。
Bag type slowly-changing isolation type anti-drag cast-in-place pile and construction method thereof
The invention discloses a bag type slowly-changing isolation type anti-drag cast-in-place pile and a construction method thereof, and belongs to the technical field of pile foundation construction, the bag type slowly-changing isolation type anti-drag cast-in-place pile comprises a reinforcement cage, an isolation membrane, a supporting membrane, a reinforcing membrane and an isolation bag, the isolation membrane, the supporting membrane and the reinforcing membrane are bonded to form an integral composite membrane structure, and the isolation bag is connected with the reinforcing membrane through bonding. The width of the isolation bag after grouting is larger than the distance between the reinforcement cage and the in-situ soil body, the concrete is poured in the composite membrane structure and expands to form a cylindrical structure, and the tensile strength of the material of the isolation membrane is far smaller than the bonding strength between the isolation membrane and the supporting membrane and far smaller than the bonding strength between the isolation membrane and the outer surface of the cast-in-place pile. The construction method comprises the following steps: forming holes in the cast-in-place pile; lowering a reinforcement cage; grouting the isolation bag; and pouring concrete. The surface of the cast-in-place pile is covered with the composite film structure, so that the problem that the pile foundation is affected by settlement in the construction process of a soft soil area or a soil filling area and after construction is solved.
本发明公开了一种囊式缓变隔离型减阻灌注桩及其施工方法，属于桩基施工技术领域，包括钢筋笼、隔离膜、支撑膜、增强膜、隔离囊袋，隔离膜、支撑膜和增强膜三者粘结形成整体复合膜结构，隔离囊袋通过粘结与增强膜连接，隔离囊袋注浆后宽度大于钢筋笼与原位土体之间的距离，混凝土浇筑在复合膜结构内，并膨胀成圆柱状结构，隔离膜的材料自身抗拉强度远小于隔离膜与支撑膜之间的粘结强度且远小于隔离膜与灌注桩外表面的粘结强度。施工时按照如下方法操作：灌注桩成孔；下放钢筋笼；隔离囊袋注浆；混凝土浇筑。本发明通过在灌注桩表面覆盖复合膜结构进而达到消除软土地区或者填土地区施工过程中及工后沉降对桩基础影响的问题。
Bag type slowly-changing isolation type anti-drag cast-in-place pile and construction method thereof
一种囊式缓变隔离型减阻灌注桩及其施工方法
SONG WEIJIE (author) / ZHU QINGKAI (author) / LI JIANPING (author) / LI ZHUANGZHUANG (author) / LIU GUANGLEI (author) / WU SIYU (author)
2024-10-01
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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