Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for forming holes for foundation piles without pile casings on aeolian sand dune steep slopes
The invention discloses a method for forming holes for foundation piles without pile casings on aeolian sand dune steep slopes. The method includes the steps: firstly, a construction platform is leveled, and a water jetting sinking method is adopted for leveling, an excavator is used for rough leveling at first, and watering and moistening are conducted simultaneously; and secondly, jet grouting pile casings are constructed, high-pressure jet grouting piles are used for continuous construction and closely combined with each other to finally form a closed annular space, the effects that the adjacent jet grouting piles partially overlap and the formed pile casings are airtight with the inner diameter being 30 cm larger than the diameter of pile foundations; wherein, the construction items for the construction of the jet grouting pile casings include drilling rig positioning, cement slurry preparing, drilling, grouting pipe lifting and mixing. Through the method of the invention, the technical problems that the disturbance of the surrounding soil in the process of vibrating steel casings is liable to cause landslides, platform collapse and other accidents since it is difficult to vibrate steel casings due to denser sand layers on the steep slopes of an aeolian sand formation, and large-scale machinery and vibrating hammers for arranging the steel casings are difficult to reach thepile positions are solved.
本发明申请公开了一种风积沙丘陡坡基桩无护筒成孔方法，包括，第一步，施工平台平整，采用水沉法平整，先采用挖掘机粗平，在粗平过程中，同时进行浇水湿润；第二步，旋喷桩护筒施工，采用高压旋喷桩连续施工，相互紧密结合，最终形成密闭的环形空间，需保证相邻旋喷桩之间部分重合，形成的护筒密闭且内径比桩基直径大30cm；其中，所述旋喷桩护筒施工的施工项目包括钻机定位、制备水泥浆、钻孔和提升喷浆管、搅拌。本发明申请解决了由于在风积沙地层陡坡上砂层较为密实导致钢护筒振设困难，设钢护筒的大型机械及振锤难以到达桩位处，导致的在振设钢护筒过程中对周边土体扰动极易造成滑坡，平台坍塌等事故的技术问题。
Method for forming holes for foundation piles without pile casings on aeolian sand dune steep slopes
The invention discloses a method for forming holes for foundation piles without pile casings on aeolian sand dune steep slopes. The method includes the steps: firstly, a construction platform is leveled, and a water jetting sinking method is adopted for leveling, an excavator is used for rough leveling at first, and watering and moistening are conducted simultaneously; and secondly, jet grouting pile casings are constructed, high-pressure jet grouting piles are used for continuous construction and closely combined with each other to finally form a closed annular space, the effects that the adjacent jet grouting piles partially overlap and the formed pile casings are airtight with the inner diameter being 30 cm larger than the diameter of pile foundations; wherein, the construction items for the construction of the jet grouting pile casings include drilling rig positioning, cement slurry preparing, drilling, grouting pipe lifting and mixing. Through the method of the invention, the technical problems that the disturbance of the surrounding soil in the process of vibrating steel casings is liable to cause landslides, platform collapse and other accidents since it is difficult to vibrate steel casings due to denser sand layers on the steep slopes of an aeolian sand formation, and large-scale machinery and vibrating hammers for arranging the steel casings are difficult to reach thepile positions are solved.
本发明申请公开了一种风积沙丘陡坡基桩无护筒成孔方法，包括，第一步，施工平台平整，采用水沉法平整，先采用挖掘机粗平，在粗平过程中，同时进行浇水湿润；第二步，旋喷桩护筒施工，采用高压旋喷桩连续施工，相互紧密结合，最终形成密闭的环形空间，需保证相邻旋喷桩之间部分重合，形成的护筒密闭且内径比桩基直径大30cm；其中，所述旋喷桩护筒施工的施工项目包括钻机定位、制备水泥浆、钻孔和提升喷浆管、搅拌。本发明申请解决了由于在风积沙地层陡坡上砂层较为密实导致钢护筒振设困难，设钢护筒的大型机械及振锤难以到达桩位处，导致的在振设钢护筒过程中对周边土体扰动极易造成滑坡，平台坍塌等事故的技术问题。
Method for forming holes for foundation piles without pile casings on aeolian sand dune steep slopes
风积沙丘陡坡基桩无护筒成孔方法
LU GUANNAN (Autor:in) / ZHANG ZHENG (Autor:in) / ZHUANG CHAOHUI (Autor:in) / PENG YUAN (Autor:in) / TANG CHENGLONG (Autor:in) / YU ZHAOHUI (Autor:in)
06.11.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
| Europäisches Patentamt | 2021
Drained behaviour of artificially cemented dune aeolian sand
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Sinking of steel casings for wells or pile foundation
| Engineering Index Backfile | 1931
| Europäisches Patentamt | 2020