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彭    麟 ¹   ,   陳繼彬^2 , 3

( 1 .  江蘇聯合職業技術學院南京分院 ，江蘇 南京 210000;  2.  成都工業學院 ， 四川 成都 610031 ;

3 . 成都理工大學 ， 四川 成都 610059)

摘   要 ：碎石土斜坡場地因坡度不同，水平抗力的大小差異明顯，斜坡坡度對土體水平抗力的影響能否保 證工程結構安全穩定 ，其如何弱化土體水平抗力的仍需探明 。本文以碎石土斜坡土體為研究對象，通過開展樁 基室內水平靜載荷試驗，深入分析不同坡度（ 斜坡坡0 ~ 45 ° )  對樁側土體水平抗力分布規律的影響 。研究表明：因不同深度土體抗力發揮程度的時效性，土體抗力隨深度 、位移的分布形式可按土體進入極限抗力狀態的不同分為三個階段；在抗力極值深度以上斜坡場地與水平場地下兩者土體抗力極值比值近似 1/1+ tanθ 關系， 以下近似為 1 ,  這也充分說明斜坡坡度對樁側土體抵抗樁身變形能力具有弱化效應；進一步參考坡度對樁側土體 抗力的變化的影響，給出了各土體極限抗力p u 和土體抗力系數 kx 等參數的取值方法 。本研究對斜坡場地結構水平抗力計算的取值有一定的借鑒作用 ，具一定的實際價值。

關鍵詞 ：斜坡 ；碎石土 ；水平抗力 ；坡度弱化效應

中圖分類號 ：TU44           

文獻標志碼 ：A           

       文章編號 ：1005- 8249  (2023)   06- 0017- 08

DOI : 10. 19860/j . cnki . issn1005- 8249. 2023 . 06. 003

PENG Lin ¹  ,  CHEN Jibin^2 , 3

( 1 . Nanjing Branch of Jiangsu United Vocational and Technical College ,   Nanjing 210000 ,   China;

2. Chengdu Technological University ,   Chengdu ,  610031 ;

3. Chengdu University of Technology ,   Chengdu 610059 ,   China)

Abstract :   Due to different slopes of gravel soil slope site, the magnitude of horizontal resistance varies obviously. Whether the impact of slope slope on soil horizontal resistance can ensure the safety and stability of engineering structure and how to weaken soil horizontal resistance still need to be proved. Taking the gravelly soil slope soil as the research object, through the indoor horizontal static load test of pile foundation, this paper deeply analyzes the influence of different slope (slope slope 0 ° ~ 45 °) on the distribution law of horizontal resistance of pile side soil. The tests reflect that the comprehensive distribution form of soil resistance with depth and displacement could be carved out  three phases according to the different conditions of soil entering the limit resistance state, all of which have a certain timeliness due to the different depth of soil resistance; Above the extreme resistance depth, the ratio of the extreme resistance of the underground soil of the slope site and the horizontal field is approximately 1/1+tanθ. And the following is approximately 1, which also fully shows that the slope gradient has a weakening effect on the resistance of soil around the pile to pile deformation; Further referring to the influence of slope on the change of soil resistance at the pile side, the value methods of soil ultimate resistance Pu and soil resistance coefficient KX are given. This study has a certain reference value for the calculation of horizontal resistance of slope site structure, and has a certain practical value.

Keywords :  slope ;   gravel soil;   horizontal resistance ;   slope weakening effect

作者簡介 ：彭麟  (1980—) ,  本科 ，高級工程師 ，從事土木工程方向。

通信作者 ：陳繼彬  (1987—) ,  博士 ，高級工程師 ，研究方向為巖土工程。

收稿日期 ：2023- 02-21