Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Man-excavated pile retaining wall bolt-shotcrete support method
The invention belongs to the technical field of man-excavated pile construction, and provides a man-excavated pile retaining wall bolt-shotcrete support method. The method comprises the steps that thediameter of a man-excavated pile is determined according to the designed pile diameter and the thickness of pre-sprayed concrete, a pile hole section is formed each time excavation is carried out by0.5-2 m, downward excavation is carried out section by section, the hole wall is supported, according to the designed vertical interval, rapid-solidification slurry is injected, therefore, an anchor rod and a rock-soil body on the periphery of an anchor hole form a reinforcing body, and according to pile body reinforcement in design requirements, reinforcement cages are bond in pole hole sectionsfinally. The anchor rod, the rapid-solidification slurry and the rock-soil body on the periphery of the anchor hole form an induration body in time, in other words, a reinforcing section is formed onthe periphery of a soil body to be excavated in the next stage, and next-section excavation construction safety is improved. Meanwhile, pile body reinforcement is carried out in the wall retaining stage, pile body reinforcement also serves as wall retaining reinforcement, therefore, construction quality can be ensured, and the construction speed can be improved. Anchor rod support is beneficial toimproving the vertical bearing capacity and pulling resistance of a single pile and improving the stress and deformation uniformity of a pile body.
本发明适用于人挖桩施工技术领域，提供了一种人挖桩护壁锚喷支护方法，通过根据设计桩径和预喷射混凝土厚度，确定人挖桩直径，每下挖0.5‑2m为一个桩孔段，逐段向下开挖并支护孔壁根据设计竖向间距，然后注入速凝浆液，以使锚杆与锚孔周边岩土体形成加固体，根据设计要求的桩身配筋，在最后在桩孔段内分段绑扎钢筋笼。本发明通过锚杆和速凝浆液，与锚孔周边岩土体及时形成固结体，相当于在下一阶段开挖土体周边形成加固段，提高下段开挖施工的安全性；同时，桩身配筋在护壁阶段施工，桩身配筋兼做护壁配筋，有利于保证施工质量和提升施工速度。锚杆支设有利于提高单桩竖向承载力和抗拔力和提升桩体受力、变形的均匀性。
Man-excavated pile retaining wall bolt-shotcrete support method
The invention belongs to the technical field of man-excavated pile construction, and provides a man-excavated pile retaining wall bolt-shotcrete support method. The method comprises the steps that thediameter of a man-excavated pile is determined according to the designed pile diameter and the thickness of pre-sprayed concrete, a pile hole section is formed each time excavation is carried out by0.5-2 m, downward excavation is carried out section by section, the hole wall is supported, according to the designed vertical interval, rapid-solidification slurry is injected, therefore, an anchor rod and a rock-soil body on the periphery of an anchor hole form a reinforcing body, and according to pile body reinforcement in design requirements, reinforcement cages are bond in pole hole sectionsfinally. The anchor rod, the rapid-solidification slurry and the rock-soil body on the periphery of the anchor hole form an induration body in time, in other words, a reinforcing section is formed onthe periphery of a soil body to be excavated in the next stage, and next-section excavation construction safety is improved. Meanwhile, pile body reinforcement is carried out in the wall retaining stage, pile body reinforcement also serves as wall retaining reinforcement, therefore, construction quality can be ensured, and the construction speed can be improved. Anchor rod support is beneficial toimproving the vertical bearing capacity and pulling resistance of a single pile and improving the stress and deformation uniformity of a pile body.
本发明适用于人挖桩施工技术领域，提供了一种人挖桩护壁锚喷支护方法，通过根据设计桩径和预喷射混凝土厚度，确定人挖桩直径，每下挖0.5‑2m为一个桩孔段，逐段向下开挖并支护孔壁根据设计竖向间距，然后注入速凝浆液，以使锚杆与锚孔周边岩土体形成加固体，根据设计要求的桩身配筋，在最后在桩孔段内分段绑扎钢筋笼。本发明通过锚杆和速凝浆液，与锚孔周边岩土体及时形成固结体，相当于在下一阶段开挖土体周边形成加固段，提高下段开挖施工的安全性；同时，桩身配筋在护壁阶段施工，桩身配筋兼做护壁配筋，有利于保证施工质量和提升施工速度。锚杆支设有利于提高单桩竖向承载力和抗拔力和提升桩体受力、变形的均匀性。
Man-excavated pile retaining wall bolt-shotcrete support method
一种人挖桩护壁锚喷支护方法
ZHANG HUIZHI (Autor:in) / LIU JIFENG (Autor:in) / YANG YUE (Autor:in) / CHEN XIAOGUO (Autor:in) / YANG MIAO (Autor:in) / HUANG LINGJUN (Autor:in) / YAN XIAOCAI (Autor:in)
29.09.2020
Patent
Elektronische Ressource
Chinesisch
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