- 摘 要
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( 上海市政工程設(shè)計(jì)研究總院（集團(tuán)）有限公司， 上海 200092)
［摘要］基于矩形盾構(gòu)隧道的梁-彈簧模型計(jì)算法，對襯砌的外形、側(cè)壓力系數(shù)、接頭剛度等計(jì)算參數(shù)對襯砌受力的影響進(jìn)行了系統(tǒng)性分析。通過對矩形盾構(gòu)法隧道不同計(jì)算模型的受力分析表明：隨著拱頂起拱量的增加，襯砌的受力得到了改善；矩形隧道由于外形的特點(diǎn)，側(cè)壓力系數(shù)及地層抗力系數(shù)的變化對襯砌的受力影響較低，表現(xiàn)出與圓形盾構(gòu)隧道不同的受力特性；隨著管片接頭剛度的提高，襯砌環(huán)在拱頂或拱底的彎矩在減少，而在拱腰部位的彎矩在增大。這些可為矩形盾構(gòu)法隧道的設(shè)計(jì)提供基礎(chǔ)性認(rèn)識(shí)。
［關(guān)鍵詞］矩形盾構(gòu)法隧道； 襯砌外形； 側(cè)壓力系數(shù)； 轉(zhuǎn)動(dòng)剛度
中圖分類號： TU398.7 文獻(xiàn)標(biāo)識(shí)碼： A文章編號： 1002-848X(2015)S2-0069-06
*上海市國資委企業(yè)技術(shù)創(chuàng)新和能級提升項(xiàng)目（201310）,上海市科學(xué)技術(shù)委員會(huì)科研計(jì)劃項(xiàng)目（13XD1422900）。
通訊作者： 官林星，高級工程師，博士，Email:guanlinxing@smeid.com。
Mechanical analysis of large cross-section rectangular shield tunnel lining in soft ground
Sun Wei, Guan Linxing
（Shanghai Municipal Engineering Design Institute (Group) Co., Ltd., Shanghai 200092, China）
Abstract: Based on the shell-spring model of rectangular shield tunnel, the relationship between the internal force of lining and the model parameters is systematically investigated. The parameters of model include the lining shape, lateral earth pressure coefficient, rigidity of joint. The mechanical analysis of many different calculation models shows the following conclusions. The internal force distribution of lining becomes better with the increase of span height. The coefficients of lateral earth pressure and ground spring affect the distribution of internal force very slightly due to the shape properties. The moment at the crown or invert of lining reduces and the moment at haunch increases with the increase of joint rigidity. The above can provide basic knowledge for design of the rectangular shield tunnel lining.
Keywords: rectangular shield tunnel; shape of lining; lateral earth pressure coefficient; joint rigidity
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