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            盾構隧道施工對柔性地下管線的影響預測及分析*
            • 作者: 宋建學,郝凌霄,師剛,等
            論文摘要

            盾構隧道施工對柔性地下管線的影響預測及分析*

            宋建學1,郝凌霄1,師剛2,張澄玄2

            (1.鄭州大學土木工程學院,河南 鄭州 450003; 2.上海同巖土木工程科技股份有限公司,上海 200092)

            [摘要]基于修正三維Peck公式,以管線接頭允許張開值為控制指標,建立了盾構施工上方柔性市政管線安全狀態評估方法,并基于工程實例研究了地鐵隧道埋深、平距等對市政管線的影響規律。當地鐵隧道埋深確定后,隨著兩隧道間距的增大,上方市政管線(土體)的絕對沉降量單調減小,而上方管線計算接頭張開值則呈勺形分布,當平距為17m時達到最大值。定義雙線地鐵隧道左右線水平間距系數CZ,則當CZ0.58時,上方市政管線沿軸線的沉降分布符合正態分布規律,沉降呈V形;當CZ>0.58時,沉降曲線不符合正態分布規律,沉降呈W形。

            [關鍵詞]隧道;盾構;地下管線;Peck公式;接口張開值;沉降

            [中圖分類號]U455     [文獻標識碼]A     [文章編號]1002-8498(2021)19-0001-05

            Safety Prediction and Analysis on Flexible Pipeline Affected by Shield Tunnel Excavation

            SONG Jianxue1, HAO Lingxiao1, SHI Gang2, ZHANG Chengxuan2 

            (1.School of Civil Engineering, Zhengzhou University, Zhengzhou, Henan 450003, China; 2.Shanghai Tongyan Civil Engineering Technology Co., Ltd., Shanghai 200092, China)

            Abstract: Based on the revised three dimension Peck formula, with the flexural departure at segments joint as key index, the safety prediction algorithm for flexible pipeline affected by beneath shield tunnel excavation is set up. Then the pipeline affecting model is determined, taking into consideration such as tunnel depth and horizontal distance between left and right lines. When the depth of tunnel is a constant, with the increase of distance between the left and right tunnel, the longitudinal settlement of pipeline decreases monotonously, however, the curvature increases to peak when the distance is 17 meters, then it decreases. When CZ0.58, the longitudinal settlement profile of pipeline is in the shape of normal distribution. On the contrary, it is in a type of W profile.

            Keywords:tunnels;shields;pipeline;Peck formula;flexural departure at joint;settlement

            *國家自然科學青年基金:軟土地區曲線隧道震害機理試驗與高效數值模擬研究(41602297

            [作者簡介]宋建學,博士,教授,Emailhlx123@gs.zzu.edu.cn

             

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