黏彈性軟土中隧道超靜孔隙水壓力解析研究
童磊，楊學(xué)林，曹國強
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童磊，楊學(xué)林，曹國強（浙江省建筑設(shè)計研究院，杭州 310006）［摘要］假定土體為飽和多孔黏彈性介質(zhì)，采用Burgers四元件流變模型來描述，結(jié)合建立在Terzaghi-endulic固結(jié)理論基礎(chǔ)上的固結(jié)-變耦合模型，采用復(fù)變函數(shù)解法，利用復(fù)變量將原平面上的研究域保角映射到像平面上的圓環(huán)域內(nèi)，在像平面上求解以超靜孔隙水壓力為變量的控制方程，進而得到原平面域上軟土盾構(gòu)隧道的超靜孔隙水壓力的解析表達式。并在此基礎(chǔ)上，研究了襯砌排水邊界條件下盾構(gòu)隧道的孔隙水壓力問題以及土體特性對孔隙水壓力的影響。［關(guān)鍵詞］軟土；黏彈性;模型；四元件體;超靜孔隙水壓力;解析解中圖分類號：TU-42， TU 433文獻標識碼：A文章編號：1002-48X(2012)08-119-5Analytical research on excess pore pressure in viscoelastic soil with a circular tunnelTong Lei, Yang Xuelin, Cao Guoqiang(Zhejiang Province Institute of Architectural Design and Research, Hangzhou 310006, China)Abstract: Based on Burges viscoelastic constitutive model and Terzaghi-endulic consolidation theory, the governing equation about excess pore water pressure is established with drainage and no-rainage boundary. The excess pore water pressure is proposed as well as the volume strain can be determined at any time, of any position in the considered region. Then an analytical solution is proposed for the excess pore water pressure of tunnel in viscoelastic saturated soil.Keywords: soft soil; viscoelasticity;Burges models;excess pore water pressure;analytical solution作者簡介：童磊，男，博士，主要從事軟土地基與地下工程的研究，Email: 75711489@qq.com。參考文獻［1］SHIRLAW J N. Observed and calculated pore pressures and deformations induced by an earth balance shield: Discussion1［J］. Canadian Geotechnical Journal, 1995, 32: 181-89.［2］詹美禮, 錢家歡, 陳緒祿. 粘彈性地基中洞周土體固結(jié)問題的解析解［J］. 河海大學(xué)學(xué)報, 1993, 21(2):54-0.［3］傅作新. 工程徐變力學(xué)［M］. 北京: 水利電力工業(yè)出版社, 1985.［4］李廣信. 高等土力學(xué)［M］. 北京: 清華大學(xué)出版社, 2004.［5］VERRUIJT A. Deformations of an elastic half plane with a circular cavity［J］.International Journal of Solids Structures,1998,35(21):2795-804.［6］詹美禮. 軟土流變實驗及隧道有限元分析［D］. 南京: 河海大學(xué), 1991.
