自重湿陷性黄土地基中双向螺旋挤土灌注桩负摩阻力的浸水试验研究

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基金项目:

甘肃省科技计划资助项目（18YF1GA055）。

IMMERSION TEST RESEARCH ON NEGATIVE FRICTION RESISTANCE FOR SOIL DISPLACEMENT SCREW PILES IN SELF-WEIGHT COLLAPSIBLE LOESS FOUNDATION

1. Lanzhou Engineering & Research Institute of Nonferrous Metallurgy Co., Ltd., Lanzhou 730000, China;
2. Gansu Civil Engineering Research Institute Co., Ltd., Lanzhou 730020, China

摘要: 当前，双向螺旋挤土灌注桩（SDS桩）已在工程中广泛应用。但SDS桩在湿陷性黄土地基中的设计仍缺乏理论依据，为探究SDS桩在湿陷性黄土地区浸水状态下的力学性状，在强湿陷性黄土场地上开展了双向螺旋挤土灌注桩原位足尺浸水试验，得到了浸水状态下双向螺旋挤土灌注桩桩侧负摩阻力沿桩身传递的变化特征等力学特性。
- 双向螺旋挤土灌注桩 /
- 湿陷性黄土地区 /
- 负摩阻力 /
- 浸水载荷试验
Abstract: Soil displacement screw(SDS)piles have been widely used in engineering fields, but the theoretical basis of design for SDS piles in collopsible loess zones was still absent. In order to explore the mechanical properties under immersion states, a full-scale immersion test of mechanical properties for SDS piles was carried out. The negative friction characteristics of two-way SDS piles along pile shafts under immersion were obtained.
- SDS pile /
- collapsible loess area /
- negative frictional resistance /
- immersion test