ࡱ> kmjg Rbjbj<<^^0 : ! !%%%4&&&hy&'T&@O~'w,^,,,///kNmNmNmNmNmNmN$Q`TNi%//"///N ! !,,N-M-M-M/B !x,%,kN-M/kN-M-M/M$X?M,Fxb& F3MWNO0@O9MTLT?MT%?M//-M/////NN-M///@O////T///////// : W/eb-NWSR{ hge 1. fkIl^Km~xvzb VnS fkIl 4300002. fkIl^RKmxvzb VnS fkIl 430022 Xd WXg'`bB\~g NbSvWSRe N&{T O~WSRt{(uagN _Nl gs gtSNBl vMR'YY9hnc] z~nx[0,ge1uWb/gSEQRS%cWSO3z'`vyrp \ NLutc[Qv{_N[Kmpenc~Tweg _0RNWSR{el v^^(uNN YTWX[O0{WSRN[Kmpencv&{0Rg~g:N S__cm^ǏWSOv3zؚ^T W~g NN[bSWSR vQ'Y\N_cm^0aW҉0WB\'`(0/eb~g^nvsQ0e-Nel(uNWX0 YTWXWSR{0 sQ.͋Wb/gWX YTWXWSRnRb -NVR{|STU432 e.shƋxA ezS1000 4548(2012)11 \O{Nhge(1963 ) 7u VnS][aN ZSX Yec~ؚ~] z^ NNmWQW0ihW] ztxvzNSN]zf0ꁨRSvKmb/gxvzN_S0E-mail: wayneywyang@163.com0 New approach to determining earth pressure in soil nailing technology YANG Yu-wen (1. Wuhan Geomatic Institute, Wuhan 430000, China; 2.Wuhan Geotechnical Engineering and Surveying Institute, Wuhan 430022, China) Abstract: The earth pressure on flexible structures in soil nailing is neither in accordance with the preconditions of the traditional pressure theory, nor has suitable theories to apply . The earth pressure thus has to be evaluated by engineering experience. A new method is proposed for evaluation of the earth pressure by combining the upper bound solution with engineering data to show the characteristics in soil nailing so as to allow soil to move and mobilize the soil strength. The new method is applied to a composite wall for validation. The analytical results are found to be in agreement with the actual conditions. The earth pressure exists after the excavation depth exceeds the self-stabilizing height of the soil. Its value is related to the excavation depth, slope angle, soil properties and supporting structural settings. The method proposed in this study is suitable for earth pressure on soil nailing walls, composite soil nailing walls. 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(MA Ping, QIN Si-qing, SUN Qiang. Computation of lateral soil pressure on soil nailing wall considering cohesion force and cut slope angle[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(12): 1888 1891. (in Chinese)) [6] hge. WX-NWSRcvz[J]. 0W NzzN] zf[b, 2010, 6(2): 300 305. (YANG Yu-wen., Investigating the earth pressure within soil nailing walls, Chinese Journal of Underground Space and Engineering, 2010, 6(2): 300 305. (in Chinese)) [7] 1gf_O, S^NS, ^. Rwmw[^gmWQWNEeRg[J]. \W] zf[b, 2010, 32(X R1): 404 409. (ZHU Yan-peng, YE Shuai-hua, MO Yong, Analysis and treatment of a deep foundation pit accident in Xining, Qinghai Province[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(S1): 404 409. (in Chinese)) [8] HCQ, ]Nim, [Ney, I{. mWQW_cvW/ebb/gN g el[J]. 0W Nzz, 1995 15(4): 241 249. (CHEN Zhao-yuan, CAI Jing-hao, SONG Er-xiang, et al. Soil nailing in deep excavations[J]. Underground Space, 1995 15(4): 241 249. (in Chinese)) [9] hge ^NS. WSO3zaW҉TWX3z[:gtRg[J]. _lyf[bbb 2012 2911 87-90. (YANG Yu-wen. Soil self-stabilizing angle and Stability mechanism of soil nail walls [J]. Journal of Yangtze River Scientific Research Institute 2012 2911 87-90.. (in Chinese)) [10] _O. aW4NLuؚ^aS\flQ_KN] z^(u[J]. \W] zb/g, 2007, 21(5): 217 220. (JIANG Zhogn-xing. Engineering application of Culmann s formula on critical height of slope[J]. Geotechnical Engineering Technique, 2007, 21(5): 217 220. (in Chinese)) [11] H)R2m. WXv$NagnˆbbVRg[J]. ]N^Q{, 2005, 35(X R): 503 505. (CHEN Li-zhou. Two slip surfaces in soil nailing wall[J]. Industrial Construction, 2005, 35(S0): 503 505. (in Chinese)) [12] dlޏu, [feP, ^Sc, I{. ^R"} YTW/ebQRSSb_Rg[J]. \wRf[N] zf[b, 2008, 27(2): 410 417. (TANG Lian-shegn, SONG Ming-jian, LIAO Hua-rong, et al, Analysis of stress deformation of prestressed cable composite soil nailing[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(2): 410 417. (in Chinese)) [13] Y R, RSf~, h. mWQW YTW/eb~gSMOՋxvz[J]. 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