A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction method of high-pressure jet grouting pile in quicksand stratum
The invention provides a construction method of a high-pressure jet grouting pile in a quicksand stratum. The construction method comprises the following steps that (1) a jet grouting drill rod of a high-pressure jet grouting drilling machine is used for drilling a hole downwards to the designed depth at the foundation construction position; (2) the jet grouting drill rod is driven to jet-grout bentonite slurry, and meanwhile the jet grouting drill rod is lifted, so that the bentonite slurry forms a bentonite slurry jet grouting pile in the hole position; (3) the jet grouting drill rod is driven to be inserted into the bentonite slurry jet grouting pile again to the designed depth; and (4) the jet grouting drill rod is driven to jet-grout cement slurry, and meanwhile the jet grouting drill rod is lifted, so that the high-pressure jet grouting pile is formed in the hole position. According to the construction method, the two-step pile forming mode is adopted, the bentonite slurry is jet-grouted in the hole position of a foundation, the bentonite slurry jet grouting pile is formed, then the cement slurry is jet-grouted in the bentonite slurry jet grouting pile, and therefore the high-pressure jet grouting pile of the bentonite and the cement slurry is formed, the pile forming quality of the high-pressure jet grouting pile in the quicksand stratum is effectively improved, and the frequency of repeated jetting is reduced.
本发明提供了一种高压旋喷桩在流砂地层中的施工方法，包括以下步骤：(1)用高压旋喷钻机的旋喷钻杆在地基施工位置处向下钻孔至设计深度；(2)一边驱使旋喷钻杆旋喷膨润土泥浆，一边提升旋喷钻杆，使得膨润土泥浆在孔位内形成膨润土泥浆旋喷桩；(3)驱使旋喷钻杆重新插入膨润土泥浆旋喷桩至设计深度；(4)一边驱使旋喷钻杆旋喷水泥浆，一边提升旋喷钻杆，从而在孔位内形成高压旋喷桩。本发明通过两步成桩的方式，先在地基的孔位内旋喷膨润土泥浆并形成膨润土泥浆旋喷桩，再在膨润土泥浆旋喷桩内旋喷水泥浆，从而形成膨润土+水泥浆的高压旋喷桩，有效提高了高压旋喷桩在流砂层中的成桩质量，减少复喷的次数。
Construction method of high-pressure jet grouting pile in quicksand stratum
The invention provides a construction method of a high-pressure jet grouting pile in a quicksand stratum. The construction method comprises the following steps that (1) a jet grouting drill rod of a high-pressure jet grouting drilling machine is used for drilling a hole downwards to the designed depth at the foundation construction position; (2) the jet grouting drill rod is driven to jet-grout bentonite slurry, and meanwhile the jet grouting drill rod is lifted, so that the bentonite slurry forms a bentonite slurry jet grouting pile in the hole position; (3) the jet grouting drill rod is driven to be inserted into the bentonite slurry jet grouting pile again to the designed depth; and (4) the jet grouting drill rod is driven to jet-grout cement slurry, and meanwhile the jet grouting drill rod is lifted, so that the high-pressure jet grouting pile is formed in the hole position. According to the construction method, the two-step pile forming mode is adopted, the bentonite slurry is jet-grouted in the hole position of a foundation, the bentonite slurry jet grouting pile is formed, then the cement slurry is jet-grouted in the bentonite slurry jet grouting pile, and therefore the high-pressure jet grouting pile of the bentonite and the cement slurry is formed, the pile forming quality of the high-pressure jet grouting pile in the quicksand stratum is effectively improved, and the frequency of repeated jetting is reduced.
本发明提供了一种高压旋喷桩在流砂地层中的施工方法，包括以下步骤：(1)用高压旋喷钻机的旋喷钻杆在地基施工位置处向下钻孔至设计深度；(2)一边驱使旋喷钻杆旋喷膨润土泥浆，一边提升旋喷钻杆，使得膨润土泥浆在孔位内形成膨润土泥浆旋喷桩；(3)驱使旋喷钻杆重新插入膨润土泥浆旋喷桩至设计深度；(4)一边驱使旋喷钻杆旋喷水泥浆，一边提升旋喷钻杆，从而在孔位内形成高压旋喷桩。本发明通过两步成桩的方式，先在地基的孔位内旋喷膨润土泥浆并形成膨润土泥浆旋喷桩，再在膨润土泥浆旋喷桩内旋喷水泥浆，从而形成膨润土+水泥浆的高压旋喷桩，有效提高了高压旋喷桩在流砂层中的成桩质量，减少复喷的次数。
Construction method of high-pressure jet grouting pile in quicksand stratum
一种高压旋喷桩在流砂地层中的施工方法
XU QINMING (author) / ZHANG YI (author) / LIU SHAOLIN (author) / ZHOU SHUDONG (author) / LIU KAI (author) / ZHANG TONGWEI (author) / ZHAO YAN (author) / ZHANG GUIBAO (author) / LIU LIANG (author) / MA XIAOZHI (author)
2021-12-17
Patent
Electronic Resource
Chinese
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