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A platform for research: civil engineering, architecture and urbanism
Construction process of sandy gravel geological variable cross-section screw pile
The invention discloses a sandy gravel geological variable cross-section screw pile construction process. The construction process is characterized by comprising the following steps that S1, surveying and setting out are carried out; S2, a screw drilling machine is moved to drill a screw pile hole in place; S3, filling and tube drawing are carried out; and S4, after concrete pouring is finished, a drill rod is moved away, and a reinforcement cage is immersed. The construction process has the beneficial effects that a variable cross-section structural shape is adopted, the main technical characteristics are that the upper part of the pile is in a straight column shape, and the lower part of the pile is in a screw shape, the distribution rule and rigidity change of pile body additional stress are met in pebble (sand) geology, meanwhile, the action between a pebble (sand) geologic layer and the pile body is adjusted, the pile body and a rock body (pebble and the like) generate a cementing effect, and a cemented community is formed, so that the side friction resistance and the end resistance of the pile are increased; and in addition, threads on the lower part of the pile body generate an inclined downward soil squeezing effect on soil around the pile and at the pile end.
本发明公开了一种砂卵石地质变截面螺杆桩施工工艺，其特征在于，包括以下步骤：步骤一：测量放线；步骤二：移动螺杆钻机就位钻螺杆桩孔；步骤三：灌装及拔管；步骤四：灌注混凝土结束后，移开钻杆并沉放钢筋笼；有益效果在于：采用变截面的构造形状，其主要技术特征表现为桩的“上部为直柱型，下部为螺丝型”，在卵石（砂）地质中满足桩身附加应力的分布规律和刚度变化的同时，调整了卵石（砂）地质层与桩身之间的作用，桩身与岩身（卵石等）产生胶结效应，形成胶结状共同体，增大了桩侧摩阻力和端阻力。此外，桩体下部螺牙对桩周和桩端土体产生斜下挤土效应。
Construction process of sandy gravel geological variable cross-section screw pile
The invention discloses a sandy gravel geological variable cross-section screw pile construction process. The construction process is characterized by comprising the following steps that S1, surveying and setting out are carried out; S2, a screw drilling machine is moved to drill a screw pile hole in place; S3, filling and tube drawing are carried out; and S4, after concrete pouring is finished, a drill rod is moved away, and a reinforcement cage is immersed. The construction process has the beneficial effects that a variable cross-section structural shape is adopted, the main technical characteristics are that the upper part of the pile is in a straight column shape, and the lower part of the pile is in a screw shape, the distribution rule and rigidity change of pile body additional stress are met in pebble (sand) geology, meanwhile, the action between a pebble (sand) geologic layer and the pile body is adjusted, the pile body and a rock body (pebble and the like) generate a cementing effect, and a cemented community is formed, so that the side friction resistance and the end resistance of the pile are increased; and in addition, threads on the lower part of the pile body generate an inclined downward soil squeezing effect on soil around the pile and at the pile end.
本发明公开了一种砂卵石地质变截面螺杆桩施工工艺，其特征在于，包括以下步骤：步骤一：测量放线；步骤二：移动螺杆钻机就位钻螺杆桩孔；步骤三：灌装及拔管；步骤四：灌注混凝土结束后，移开钻杆并沉放钢筋笼；有益效果在于：采用变截面的构造形状，其主要技术特征表现为桩的“上部为直柱型，下部为螺丝型”，在卵石（砂）地质中满足桩身附加应力的分布规律和刚度变化的同时，调整了卵石（砂）地质层与桩身之间的作用，桩身与岩身（卵石等）产生胶结效应，形成胶结状共同体，增大了桩侧摩阻力和端阻力。此外，桩体下部螺牙对桩周和桩端土体产生斜下挤土效应。
Construction process of sandy gravel geological variable cross-section screw pile
一种砂卵石地质变截面螺杆桩施工工艺
ZHANG TAO (author) / ZHANG YONGWEI (author) / CHEN WENHUA (author) / NIU YONGJIE (author) / LI SHUAILIN (author)
2021-12-07
Patent
Electronic Resource
Chinese
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