【摘要】：考慮軟弱松散巖體的復(fù)雜性和淺埋隧洞山巖壓力計(jì)算理論的不確定性,針對(duì)托巴水電站中路溝棄渣場(chǎng)排水隧洞,基于淺埋隧洞山巖壓力不同的計(jì)算理論,通過SDCAD結(jié)構(gòu)力學(xué)計(jì)算方法對(duì)襯砌結(jié)構(gòu)展開穩(wěn)定性分析。結(jié)果表明,對(duì)于軟弱松散巖體淺埋隧洞,側(cè)向山巖壓力采用主動(dòng)土壓力的計(jì)算成果更為合適;在底板和邊墻連接處增設(shè)貼腳措施,能夠有效緩解直角方案的應(yīng)力集中,并可減少抗剪鋼筋,降低邊墻和底板連接處剪切破壞的可能性,對(duì)保證工程安全、加快施工速度和節(jié)省工程投資具有重大意義。
[Abstract]:Considering the complexity of soft and loose rock mass and the uncertainty of the calculation theory of mountain rock pressure in shallow tunnel, aiming at the drainage tunnel in the middle channel of Toba Hydropower Station, based on the different calculation theory of mountain rock pressure in shallow tunnel, The stability analysis of lining structure is carried out by SDCAD structural mechanics calculation method. The results show that for shallow buried tunnel of soft loose rock mass, active earth pressure is more suitable for lateral rock pressure calculation, adding foot sticking measures to the joint of bottom plate and side wall can effectively alleviate the stress concentration of right angle scheme. It can reduce the shear resistance of steel bar and reduce the possibility of shear failure at the joint of side wall and floor. It is of great significance to ensure the safety of the project, accelerate the construction speed and save the project investment.
【作者單位】： 水能資源利用關(guān)鍵技術(shù)湖南省重點(diǎn)實(shí)驗(yàn)室;中國(guó)電建集團(tuán)中南勘測(cè)設(shè)計(jì)研究院有限公司;
【分類號(hào)】：TV672.1

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