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梁仁旺¹， 李建軍^1,2， 郭 印³， 喻遠(yuǎn)鵬⁴， 樊春義⁵， 馬克生^l
（1 太原理工大學(xué)建筑與土木工程學(xué)院，太原 030024；2 中北大學(xué)土木工程系，太原 030051；3 建設(shè)綜合勘察設(shè)計(jì)院巖土工程研究所，北京 100007；4 中旭建筑設(shè)計(jì)公司，北京 100044； 5 山西金石公司，太原 030012）

[摘要] 通過對(duì)晉中擬建體育館濕陷性黃土場地所采用的沖擊成孔擠擴(kuò)支盤樁進(jìn)行浸水靜載荷試驗(yàn)，并在兩根試樁上、下盤底和樁端預(yù)埋土壓力盒進(jìn)行應(yīng)力測試，基于靜載荷作用下試樁Q-s曲線的特征和上下盤、樁端的應(yīng)力測試結(jié)果進(jìn)行荷載傳遞規(guī)律的分析，并探討了土層浸水飽和對(duì)支盤樁側(cè)阻和端阻發(fā)揮的影響，為以后支盤樁在濕陷性黃土中的應(yīng)用提供可靠的依據(jù)。
[關(guān)鍵詞] 濕陷性黃土；支盤后注漿樁；浸水飽和；負(fù)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