Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pile forming method for jet grouting pile in flowing water sand layer
The invention discloses a pile forming method for a jet grouting pile in a flowing water sand layer. The pile forming method comprises the steps that S1, a geological drilling rig is adopted for drilling; S2, clay powder is adopted and mixed with efficient high-foaming bentonite, and first-time jet grouting jetting is conducted in a drilled hole; and S3, cement paste and water glass are adopted for conducting second-time jet grouting jetting in the drilled hole at the same time, the pressure of the second-time jet grouting jetting is smaller than that of the first-time jet grouting jetting, and the lifting speed of the second-time jet grouting jetting is larger than that of the first-time jet grouting jetting. According to the pile forming method, the second-time jet grouting jetting is adopted in the flowing water sand layer; the second-time jet grouting jetting is adopted in the same drilled hole, the clay powder and the bentonite paste of the first-time jet grouting jetting are used for stabilizing gaps between the sand layer and sand grains filling the sand layer firstly, and the sand layer is changed into a sand and soil mixture; and an efficient water reducing agent is added in the cement paste of the second-time jetting, the cement paste of the second-time jet grouting jetting can be prevented from being diluted or washed away or taken away by underground water before being solidified, the success rate of pile forming is increased, and the quality of the jet grouting pile is guaranteed.
本发明公开了一种在动水砂层中的旋喷桩成桩方法，包括S1、采用地质钻机进行钻孔；S2、采用粘土泥粉并掺入高效高发膨润土向钻孔内进行第一次旋喷喷射；S3、采用水泥浆和水玻璃同时向钻孔内进行第二次旋喷喷射；第二次旋喷喷射的压力比第一次旋喷的压力小，第二次旋喷喷射的提升速度比第一次旋喷的提升速度大。本发明釆用在动水砂层中二次旋喷喷射；在同一钻孔内采用二次旋喷喷射，第一次旋喷喷射的粘土粉和膨润土浆来先稳定砂层和填充砂层的砂粒之间的空隙，把砂层改变成砂土混合体；在第二次喷射的水泥浆中添加高效减水剂，可防止第二次旋喷喷射的水泥浆在还没有凝固前被地下水稀释或冲走、带走，提高了成桩的成功率，保证旋喷桩的质量。
Pile forming method for jet grouting pile in flowing water sand layer
The invention discloses a pile forming method for a jet grouting pile in a flowing water sand layer. The pile forming method comprises the steps that S1, a geological drilling rig is adopted for drilling; S2, clay powder is adopted and mixed with efficient high-foaming bentonite, and first-time jet grouting jetting is conducted in a drilled hole; and S3, cement paste and water glass are adopted for conducting second-time jet grouting jetting in the drilled hole at the same time, the pressure of the second-time jet grouting jetting is smaller than that of the first-time jet grouting jetting, and the lifting speed of the second-time jet grouting jetting is larger than that of the first-time jet grouting jetting. According to the pile forming method, the second-time jet grouting jetting is adopted in the flowing water sand layer; the second-time jet grouting jetting is adopted in the same drilled hole, the clay powder and the bentonite paste of the first-time jet grouting jetting are used for stabilizing gaps between the sand layer and sand grains filling the sand layer firstly, and the sand layer is changed into a sand and soil mixture; and an efficient water reducing agent is added in the cement paste of the second-time jetting, the cement paste of the second-time jet grouting jetting can be prevented from being diluted or washed away or taken away by underground water before being solidified, the success rate of pile forming is increased, and the quality of the jet grouting pile is guaranteed.
本发明公开了一种在动水砂层中的旋喷桩成桩方法，包括S1、采用地质钻机进行钻孔；S2、采用粘土泥粉并掺入高效高发膨润土向钻孔内进行第一次旋喷喷射；S3、采用水泥浆和水玻璃同时向钻孔内进行第二次旋喷喷射；第二次旋喷喷射的压力比第一次旋喷的压力小，第二次旋喷喷射的提升速度比第一次旋喷的提升速度大。本发明釆用在动水砂层中二次旋喷喷射；在同一钻孔内采用二次旋喷喷射，第一次旋喷喷射的粘土粉和膨润土浆来先稳定砂层和填充砂层的砂粒之间的空隙，把砂层改变成砂土混合体；在第二次喷射的水泥浆中添加高效减水剂，可防止第二次旋喷喷射的水泥浆在还没有凝固前被地下水稀释或冲走、带走，提高了成桩的成功率，保证旋喷桩的质量。
Pile forming method for jet grouting pile in flowing water sand layer
一种在动水砂层中的旋喷桩成桩方法
GU WEIBIN (Autor:in) / WANG DONGYING (Autor:in) / CAI QIANG (Autor:in) / LI SHITIAN (Autor:in) / LIN QINGTAO (Autor:in)
03.12.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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