【正文】 摘 要 該設(shè)計運用所學(xué)的知識完成木沖隧道 左 線的設(shè)計與施工。木沖隧道 左 線長 1825m所經(jīng)地區(qū)為典型的喀斯特地貌，地層為以砂巖、頁巖、粉砂巖為主的寒武系地層。 首先 依據(jù)工程要求和設(shè)計規(guī)范確定隧道斷面，然后根據(jù)“荷載 結(jié)構(gòu)”法通過ANSYS 對結(jié)構(gòu)進(jìn)行強(qiáng)度檢算，根據(jù)檢算結(jié)果配筋。隧道圍巖等級主要以Ⅱ級、Ⅲ級、Ⅳ級和Ⅴ級為主。Ⅱ級和Ⅲ級圍巖比較穩(wěn)定設(shè)計采用全斷面開挖，Ⅴ級和 Ⅳ 級圍巖，由于圍巖情況差，開挖斷面較大設(shè)計采用中側(cè)壁導(dǎo)坑法。隧道的 主要 施工方法：隧道采用新奧法施工，以噴射混凝土錨桿作為主要的支護(hù)手段，通過檢測 控制圍巖變形，充分發(fā)揮圍巖的自承能力。 通過 對圍巖的力學(xué)形態(tài)以及支護(hù)結(jié)構(gòu)的工作狀態(tài)的監(jiān)控量測來評價設(shè)計施工水平并及時的改進(jìn)與調(diào)整。 隧道采用管棚作為超前支護(hù)， 初期支護(hù)采用超前或徑向注漿錨桿 (小導(dǎo)管 )、型鋼鋼架、鋼格柵及掛網(wǎng)濕噴等施工技術(shù) ，當(dāng)圍巖與初期支護(hù)基本穩(wěn)定后施做二次襯砌 關(guān)鍵詞： 高速公路 隧道 結(jié)構(gòu)設(shè)計 施工 新奧 法 Abstract The design plete the left hand lane tunnel red wood design and construction .The length of the left line of Mu Chong Tunnel is1825 meter, it crosses karst areas, Formation is mainly made of sandstone, shale and siltstone Cambrian strata. First of all, based on engineering requirements and design specifications to determine the tunnel section, And then under the load the structure law of the structure through the ANSYS calculation of strength, according to the results of reinforcement calculation. The main tunnel level to grade Ⅱ , Ⅲ level, Ⅳ and Ⅴ grade classbased. Grade Ⅱ and Ⅲ level design is more stable rock so use fullface excavation, Level and grade Ⅳ Ⅴ rock, rock the situation as a result of poor design of the excavation crosssection using a larger hole in the wall guide method. NATM is the main tunnel construction methods. NATM is the construction method that Shotcrete Anchor is the main means of support by detecting the the monitoring of mechanical form of rock and Supporting the work of state structures evaluate the level of design and construction of improvements in a timely manner with the adjustment Lead pipe roof supports the early Support adopts advanced or radial grouting bolt linked work of steel gratings and construction technology, such as wetspray. When the rock and the initial support facilities achieve stability then secondary lining Keywords: Expressway Tunnel Design of lining structure Construction NATM 目錄 第 1 章 緒論 ....................................................................................................................... 1 課題研究背景 ....................................................................................................... 1 國內(nèi)公路隧道發(fā)展?fàn)顩r ....................................................................................... 1 國外公路隧道發(fā)展?fàn)顩r ....................................................................................... 2 設(shè)計內(nèi)容 ............................................................................................................... 3 主要研究的內(nèi)容 ....................................................................................... 3 基本要求 ................................................................................................... 3 第 2 章 設(shè)計的原則 和標(biāo)準(zhǔn) ............................................................................................... 4 設(shè)計依據(jù) ............................................................................................................... 4 主要技術(shù)指標(biāo) ....................................................................................................... 4 第 3 章 工程概況 ............................................................................................................... 5 工程概況 ............................................................................................................... 5 工程地質(zhì)及水文地質(zhì) ........................................................................................... 5 地形地貌 ................................................................................................... 5 地質(zhì)構(gòu)造 ................................................................................................... 5 地層巖性 ................................................................................................... 7 水文地質(zhì)特征 ........................................................................................... 9 巖溶發(fā)育特征 ........................................................................................... 9 不良地質(zhì)現(xiàn)象 ........................................................................................... 9 地震烈度 ................................................................................................. 10 隧道圍巖分類 ......................................................................................... 10 第 4 章 內(nèi)輪廓的確定 ..................................................................................................... 12 內(nèi)部凈空的確定 ................................................................................................. 12 結(jié)構(gòu)斷面形式及尺寸初步擬定 ......................................................................... 13 第 5 章 公路隧道襯砌結(jié)構(gòu)的設(shè)計和計算 ..................................................................... 14 圍巖壓力計算 ..................................................................................................... 14 Ⅲ級圍巖壓力計算 ................................................................................. 14 Ⅴ級圍巖壓力計算 ................................................................................. 14 襯砌內(nèi)力計算 ..................................................................................................... 15 ANSYS 加載求襯砌內(nèi)力過程 ............................................................................... 15 Ⅲ級圍巖襯砌內(nèi)力計算與強(qiáng)度檢驗 ..................................................... 16 Ⅴ級圍巖襯砌內(nèi)力計算與強(qiáng)度檢算 ..................................................... 19 襯砌結(jié)構(gòu)強(qiáng)度檢算原理 ..................................................................................... 22 襯砌截面配筋計算 ............................................................................................. 23 截面配筋原理 ......................................................................................... 23 Ⅲ級圍巖配筋計算 ................................................................................. 24 Ⅴ級圍巖配筋計算 ...................