梁仁旺¹， 李建军^1,2， 郭 印³， 喻远鹏⁴， 樊春义⁵， 马克生^l
（1 太原理工大学建筑与土木工程学院，太原 030024；2 中北大学土木工程系，太原 030051；3 建设综合勘察设计院岩土工程研究所，北京 100007；4 中旭建筑设计公司，北京 100044； 5 山西金石公司，太原 030012）

[摘要] 通过对晋中拟建体育馆湿陷性黄土场地所采用的冲击成孔挤扩支盘桩进行浸水静载荷试验，并在两根试桩上、下盘底和桩端预埋土压力盒进行应力测试，基于静载荷作用下试桩Q-s曲线的特征和上下盘、桩端的应力测试结果进行荷载传递规律的分析，并探讨了土层浸水饱和对支盘桩侧阻和端阻发挥的影响，为以后支盘桩在湿陷性黄土中的应用提供可靠的依据。
[关键词] 湿陷性黄土；支盘后注浆桩；浸水饱和；负摩阻力

Test on characteristics of post-grouting pile with branches and plates in collapsible loess
Liang Renwang¹, Li Jianjun^1,2, Guo Yin³, Yu Yuanpeng⁴, Fan Chunyi⁵, Ma Kesheng¹
(1 College of Civil Eng., Taiyuan Uni. of Technology, Taiyuan 030024, China; 2 School of Civil Eng., North Uni. of China, Taiyuan 030051, China; 3 China of Geotechnical Investigation and Surveying, Beijing 100007, China; 4 Zhongxu Architecture Design Co., Ltd., Beijing 100044, China; 5 Jinshi Architecture Foundation Co., Ltd. of Shanxi, Taiyuan 030012, China)

Abstract: Q-s curve is got by the in-situ test of post-grouting pile with expanded branches and plates in Jinzhong collapsible loess after immersion, and earth pressure is measured by burying earth pressure cell under the end of pile and plates. Based on the data from the test, it analyzes the load transfer mechanism and immersion saturated impact on the skin friction and end bearing. It also provides practical evidence for the application of post-grouting pile with branches and plates in the collapsible loess field.
Keywords: collapsible loess; post-grouting pile with branches and plates; immersion saturated; negative friction