A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction method of ultra-long large-diameter rotary excavation pile
The invention discloses a construction method of an ultra-long large-diameter rotary excavation pile. The construction method of the ultra-long large-diameter rotary excavation pile specifically comprises the following steps of: 1, quickly forming a hole by using hard plastic clay: performing hole forming construction by using a high-power rotary drilling rig; and enabling the rotary drilling rigto drill to extrude soil blocks into a drilling bucket through pressure and then integrally take out the soil blocks, so that the phenomenon of drill pasting can be avoided; 2, reinforcing the drilledhole: coating slurry to the side wall of the drilled hole so that sand layer holes cannot collapse; and 3, preparing reinforcing slurry: adopting fresh water to prepare slurry, adopting high-qualitybentonite adapting to 20% seawater as the slurry so that the prepared slurry cannot be separated, and coating the prepared and formed slurry to the side wall of a hole. According to the construction method of the ultra-long large-diameter rotary excavation pile, the construction efficiency advantage of the rotary drilling rig is obvious, and the hole forming quality is controllable; as a hard plastic clay super-long pile foundation is constructed by adopting the rotary drilling rig in a marine environment, the cost, especially the construction period cost, is reduced, and considerable economicbenefits and social benefits are achieved.
本发明公开了一种超长大直径旋挖桩施工方法，所述超长大直径旋挖桩施工方法具体包括以下步骤：步骤一：硬塑性粘土快速成孔，采用大功率的旋挖钻机进行成孔施工；旋挖钻机钻进通过压力将土块挤入钻斗内再整体取出，从而不会发生糊钻现象；步骤二：对钻孔进行加强，钻孔侧壁涂布泥浆，使砂层孔洞不会发生坍塌；步骤三：加强泥浆制备，采用淡水制备泥浆，泥浆采用适应20％海水的优质膨润土，使制备的泥浆不会出现离析，将制备成型的泥浆涂抹在孔洞侧壁上，本发明旋挖钻机施工效率优势明显，成孔质量可控，海洋环境下硬塑性粘土超长桩基采用旋挖钻施工，降低了成本，特别是工期成本，有着相当可观的经济效益和社会效益。
Construction method of ultra-long large-diameter rotary excavation pile
The invention discloses a construction method of an ultra-long large-diameter rotary excavation pile. The construction method of the ultra-long large-diameter rotary excavation pile specifically comprises the following steps of: 1, quickly forming a hole by using hard plastic clay: performing hole forming construction by using a high-power rotary drilling rig; and enabling the rotary drilling rigto drill to extrude soil blocks into a drilling bucket through pressure and then integrally take out the soil blocks, so that the phenomenon of drill pasting can be avoided; 2, reinforcing the drilledhole: coating slurry to the side wall of the drilled hole so that sand layer holes cannot collapse; and 3, preparing reinforcing slurry: adopting fresh water to prepare slurry, adopting high-qualitybentonite adapting to 20% seawater as the slurry so that the prepared slurry cannot be separated, and coating the prepared and formed slurry to the side wall of a hole. According to the construction method of the ultra-long large-diameter rotary excavation pile, the construction efficiency advantage of the rotary drilling rig is obvious, and the hole forming quality is controllable; as a hard plastic clay super-long pile foundation is constructed by adopting the rotary drilling rig in a marine environment, the cost, especially the construction period cost, is reduced, and considerable economicbenefits and social benefits are achieved.
本发明公开了一种超长大直径旋挖桩施工方法，所述超长大直径旋挖桩施工方法具体包括以下步骤：步骤一：硬塑性粘土快速成孔，采用大功率的旋挖钻机进行成孔施工；旋挖钻机钻进通过压力将土块挤入钻斗内再整体取出，从而不会发生糊钻现象；步骤二：对钻孔进行加强，钻孔侧壁涂布泥浆，使砂层孔洞不会发生坍塌；步骤三：加强泥浆制备，采用淡水制备泥浆，泥浆采用适应20％海水的优质膨润土，使制备的泥浆不会出现离析，将制备成型的泥浆涂抹在孔洞侧壁上，本发明旋挖钻机施工效率优势明显，成孔质量可控，海洋环境下硬塑性粘土超长桩基采用旋挖钻施工，降低了成本，特别是工期成本，有着相当可观的经济效益和社会效益。
Construction method of ultra-long large-diameter rotary excavation pile
一种超长大直径旋挖桩施工方法
CHEN QINGHUA (author) / TANG WEI (author) / YAN HUATANG (author) / DAI XIANGUO (author) / ZENG LINGYE (author) / JING JIACHI (author)
2020-12-11
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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