雙慶場集鎮(zhèn)地質(zhì)災(zāi)害綜合治理工程施工圖設(shè)計計算書

PAGEPAGE4雙慶場集鎮(zhèn)地質(zhì)災(zāi)害綜合治理工程施工圖設(shè)計計算書TOC\o"1-2"\h\z\u1工程概況 12設(shè)計依據(jù) 23設(shè)計參數(shù) 24設(shè)計工況及標(biāo)準(zhǔn) 35危巖穩(wěn)定性計算 55.1危巖穩(wěn)定性劃分 55.2穩(wěn)定性計算分析 55.3穩(wěn)定性計算結(jié)果 86危巖加固計算 156.1危巖錨固計算 156.2危巖嵌補(bǔ)支撐計算 261工程概況石柱縣南賓街道雙慶場集鎮(zhèn)地處重慶市東南部山間河流交匯地段，受復(fù)雜的地質(zhì)環(huán)境條件制約和頻繁的人類工程活動影響，歷來是石柱縣的危巖、崩塌地質(zhì)災(zāi)害多發(fā)區(qū)，也是重慶市規(guī)劃和自然資源局【渝規(guī)資】719號文確定的36個重點(diǎn)地質(zhì)災(zāi)害城集鎮(zhèn)之一。由于長期內(nèi)外地質(zhì)作用的影響，近年來，雙慶場集鎮(zhèn)范圍引發(fā)的危巖地質(zhì)災(zāi)害不斷由點(diǎn)向面擴(kuò)展，嚴(yán)重威脅轄區(qū)人民群眾的生命財產(chǎn)安全，成為城鎮(zhèn)規(guī)劃建設(shè)和經(jīng)濟(jì)發(fā)展的重要制約因素。雙慶場地處河流交匯地帶，三側(cè)河谷岸坡均發(fā)育有多級陡崖危巖帶（體），長期以來，雙慶場危巖斷續(xù)發(fā)生規(guī)模、大小不一的崩塌破壞，對集鎮(zhèn)區(qū)人民群眾生命財產(chǎn)安全造成威脅。2017年6月5日，雙慶場西岸背石巖有4處危巖體發(fā)生了裂隙滲水及巖體局部垮塌掉塊等較明顯的變形破壞跡象，嚴(yán)重威脅危巖帶下方S202省道及場鎮(zhèn)街道人民群眾的生命財產(chǎn)安全，造成道路臨時封閉并上報重慶市交委、撤離下方十多戶居民，影響較大；2020年7月17日，因汛期連續(xù)強(qiáng)降雨，雙慶場東岸黃鶴村村委東側(cè)陡崖危巖帶出現(xiàn)危巖垮塌，垮塌規(guī)模約數(shù)十方，危巖體砸壞坡腳村道路面，幸無人員傷亡，據(jù)訪問，近年來每到汛期，黃鶴村村委東側(cè)陡崖危巖帶經(jīng)常發(fā)生巖體垮塌、掉塊現(xiàn)象，時常有巖塊掉落沖擊陡崖鄰近居民樓，在墻壁上砸出坑洞，該側(cè)陡崖危巖帶長約206m，高度20~40m，陡崖下方居民樓林立、人群高度密集，該危巖帶地災(zāi)安全隱患較突出。雙慶場危巖近年來的變形跡象引起了石柱縣人民政府及重慶市規(guī)劃和自然資源局的高度重視，為確保雙慶場集鎮(zhèn)區(qū)內(nèi)人民群眾生命財產(chǎn)安全，切實(shí)做好防災(zāi)、減災(zāi)工作，避免重大地質(zhì)災(zāi)害造成群死群傷，盡快開展雙慶場集鎮(zhèn)地質(zhì)災(zāi)害綜合治理是當(dāng)?shù)厝嗣袢罕姷钠惹幸?，是非常必要的。目前，石柱縣雙慶場集鎮(zhèn)地質(zhì)災(zāi)害綜合治理工程已由重慶市規(guī)劃和自然資源局以渝規(guī)資〔2020〕378號文批準(zhǔn)建設(shè)，項(xiàng)目業(yè)主為石柱土家族自治縣地質(zhì)環(huán)境監(jiān)測站。我單位通過參加公開招投標(biāo)，成為石柱縣雙慶場集鎮(zhèn)地質(zhì)災(zāi)害綜合治理項(xiàng)目的勘查、設(shè)計單位。前期已由我隊(duì)完成了重慶市石柱縣雙慶場集鎮(zhèn)地質(zhì)災(zāi)害綜合治理工程勘查工作，受業(yè)主委托，現(xiàn)由我隊(duì)在《勘查報告》的基礎(chǔ)上，對重慶市石柱縣雙慶場集鎮(zhèn)地質(zhì)災(zāi)害綜合治理工程進(jìn)行初步設(shè)計的編制工作。2設(shè)計依據(jù)1）《重慶市石柱縣雙慶場集鎮(zhèn)地質(zhì)災(zāi)害綜合治理工程勘查報告》，重慶市地質(zhì)礦產(chǎn)勘查開發(fā)局南江水文地質(zhì)工程地質(zhì)隊(duì)，2021.01；2）重慶市地環(huán)總站關(guān)于《重慶市石柱縣雙慶場集鎮(zhèn)地質(zhì)災(zāi)害綜合治理工程勘查報告》的評估報告，重慶市地環(huán)總站，2021.02；3）《混凝土結(jié)構(gòu)設(shè)計規(guī)范》GB50010-2015；4）《地質(zhì)災(zāi)害防治工程勘查規(guī)范》DB50/T143-2018；5）《地質(zhì)災(zāi)害防治工程設(shè)計標(biāo)準(zhǔn)》DBJ50/T-029-2019；6）《室外排水設(shè)計規(guī)范》，GB50014-2016；3設(shè)計參數(shù)危巖體治理設(shè)計所需計算參數(shù)采用《勘查報告》提供參數(shù)，具體取值如下：指標(biāo)天然/飽和重度γ/kN/m3天然/飽和抗壓強(qiáng)度標(biāo)準(zhǔn)值frk/MPa承載力特征值fa/kPa天然/飽和內(nèi)摩擦角φ/°天然/飽和粘聚力C/kPa基底摩擦系數(shù)μ天然/飽和抗拉強(qiáng)度天然/飽和變形模量天然/飽和泊松比巖性雜填土粉質(zhì)粘土強(qiáng)風(fēng)化泥巖中風(fēng)化泥巖強(qiáng)風(fēng)化砂巖中風(fēng)化砂巖備注（1）上表中帶*的建議值為根據(jù)現(xiàn)行勘查規(guī)范參考鄰近工程資料及區(qū)域經(jīng)驗(yàn)綜合取值。（2）巖石地基承載力特征值由巖石單軸抗壓強(qiáng)度標(biāo)準(zhǔn)值按分項(xiàng)系數(shù)0.33、地基條件系數(shù)1.1折減取值；（3）結(jié)構(gòu)面抗剪強(qiáng)度建議值。砂巖結(jié)構(gòu)面抗剪強(qiáng)度建議值（硬質(zhì)結(jié)構(gòu)面、結(jié)合差）：天然狀態(tài)粘聚力C取60kPa，內(nèi)摩擦角φ取22°；飽和狀態(tài)粘聚力C取55kPa，內(nèi)摩擦角φ取20°；砂巖巖層結(jié)合差，層面抗剪強(qiáng)度粘聚力c=50kPa，內(nèi)摩擦角φ=18°；泥巖巖層結(jié)合很差，層面抗剪強(qiáng)度粘聚力c=40kPa，內(nèi)摩擦角φ=16°。（4）邊坡坡率值（坡高≤8.0m）：第四系土層臨時放坡坡率按1:1.75分階放坡；對強(qiáng)風(fēng)化基巖臨時放坡坡率按1:1.00放坡；對中等風(fēng)化基巖臨時放坡坡率按1：0.75分階放坡，有外傾結(jié)構(gòu)面控制的巖質(zhì)邊坡按外傾結(jié)構(gòu)面傾角放坡，同時應(yīng)加強(qiáng)對邊坡的截排水及變形觀測工作；（5）M30砂漿錨固體與巖石極限粘結(jié)強(qiáng)度標(biāo)準(zhǔn)值：強(qiáng)風(fēng)化巖石取270kPa；中等風(fēng)化泥巖取300kPa；中等風(fēng)化砂巖取1200kPa。結(jié)構(gòu)面取值：砂巖巖體裂隙結(jié)構(gòu)面天然抗剪強(qiáng)度粘聚力c=60kPa，內(nèi)摩擦角φ=22°；飽和抗剪強(qiáng)度粘聚力c=55kPa，內(nèi)摩擦角φ=20°；巖體層面結(jié)合差，砂巖巖層層面抗剪強(qiáng)度粘聚力c=50kPa，內(nèi)摩擦角φ=18°；泥巖巖層層面抗剪強(qiáng)度粘聚力c=40kPa，內(nèi)摩擦角φ=16°。治理結(jié)構(gòu)設(shè)計正常使用年限：50年4設(shè)計工況及標(biāo)準(zhǔn)1）計算工況：工況防治工程等級破壞模式荷載組合穩(wěn)定安全系數(shù)工況1：暴雨工況二級滑移式自重+地表荷載+裂隙水壓力1.30傾倒式自重+地表荷載+裂隙水壓力1.40墜落式自重+地表荷載+裂隙水壓力1.50工況2：地震工況滑移式自重+地表荷載+裂隙水壓力+地震力1.10傾倒式自重+地表荷載+裂隙水壓力+地震力1.15墜落式自重+地表荷載+裂隙水壓力+地震力1.20工況1：暴雨工況三級滑移式自重+地表荷載+裂隙水壓力1.20傾倒式自重+地表荷載+裂隙水壓力1.30墜落式自重+地表荷載+裂隙水壓力1.40工況2：地震工況滑移式自重+地表荷載+裂隙水壓力+地震力1.05傾倒式自重+地表荷載+裂隙水壓力+地震力1.10墜落式自重+地表荷載+裂隙水壓力+地震力1.152）設(shè)計標(biāo)準(zhǔn)：表4.1危巖穩(wěn)定性劃分表危巖類型危巖體穩(wěn)定狀態(tài)不穩(wěn)定欠穩(wěn)定基本穩(wěn)定穩(wěn)定滑移式F＜1.01.0≤F＜1.151.15≤F<FtF≥Ft傾倒式F＜1.01.0≤F<1.251.25≤F<FtF≥Ft墜落式F＜1.01.0≤F<1.351.35≤F<FtF≥Ft表4.2危巖穩(wěn)定性安全系數(shù)Ft危巖類型危巖崩塌危害性分級一級二級三級一般工況校核工況一般工況校核工況一般工況校核工況滑移式1.401.151.301.101.201.05傾倒式1.501.201.401.151.301.10墜落式1.601.251.501.201.401.153）設(shè)計暴雨強(qiáng)度重現(xiàn)期：20年一遇4）防治等級：雙慶場北岸危巖主要威脅坡下北岸建成區(qū)居民13戶60人的生命財產(chǎn)安全，引水渠約400m，受威脅資產(chǎn)約820萬元，地質(zhì)災(zāi)害防治工程等級為三級。雙慶場西岸危巖主要威脅坡下西岸建成區(qū)居民30戶125人的生命財產(chǎn)安全，202省道公路約640m，受威脅資產(chǎn)約2230萬元，地質(zhì)災(zāi)害防治工程等級為三級。雙慶場東岸北段危巖主要威脅坡下東岸北段建成區(qū)居民6戶30人的生命財產(chǎn)安全，受威脅資產(chǎn)約470萬元，地質(zhì)災(zāi)害防治工程等級為三級；雙慶場東岸南段危巖主要威脅坡下東岸南段建成區(qū)居民123戶426人的生命財產(chǎn)安全，村道公路約560m，受威脅資產(chǎn)約5710萬元，地質(zhì)災(zāi)害防治工程等級為二級。5）治理結(jié)構(gòu)設(shè)計基準(zhǔn)期：50年5危巖穩(wěn)定性計算5.1危巖穩(wěn)定性劃分表5.1危巖穩(wěn)定性劃分表破壞模式不穩(wěn)定欠穩(wěn)定基本穩(wěn)定穩(wěn)定滑塌式F<1.01.0≤F<1.151.15≤F<FtF≥Ft傾倒式F<1.01.0≤F<1.251.25≤F<FtF≥Ft墜落式F<1.01.0≤F<1.351.35≤F<FtF≥Ft5.2穩(wěn)定性計算分析采用《地質(zhì)災(zāi)害防治工程設(shè)計標(biāo)準(zhǔn)》DBJ50/T-029-2019公式進(jìn)行計算。1）滑移式a)后緣無陡傾裂隙時：b)后緣有陡傾裂隙，滑面緩傾時：圖5-1滑移式危巖穩(wěn)定性計算V—裂隙水壓力（kN/m）；Q—地震力（kN/m）；Fs—危巖穩(wěn)定性系數(shù)；c—后緣裂隙粘聚力標(biāo)準(zhǔn)值（kpa）；當(dāng)裂隙未貫通時，取貫通和未貫通段粘聚力標(biāo)準(zhǔn)值按長度加權(quán)平均值，未貫通段粘聚力標(biāo)準(zhǔn)值取巖石粘聚力標(biāo)準(zhǔn)值的0.4倍；φ—后緣裂隙內(nèi)摩擦角標(biāo)準(zhǔn)值（o）；當(dāng)裂隙未貫通時，取貫通和未貫通段粘聚力標(biāo)準(zhǔn)值按長度加權(quán)平均值，未貫通段粘聚力標(biāo)準(zhǔn)值取巖石粘聚力標(biāo)準(zhǔn)值的0.95倍；α—滑面傾角（o）；W—危巖體自重（kN/m）ξe—地震水平振動系數(shù)；U—滑面水壓力（kN/m）；hw—裂隙充水高度（m）,取裂隙深度的1/2～2/3；l—滑面長度（m）；2）墜落式a)對后緣有陡傾裂隙的懸挑式危巖按下列二式計算，穩(wěn)定性系數(shù)取兩種計算結(jié)果中的較小值。，b)對后緣無陡傾裂隙的懸挑式危巖按下列二式計算，穩(wěn)定性系數(shù)取兩種計算結(jié)果中的較小值，（a）后緣有陡傾裂隙（b）后緣無陡傾裂隙圖5-2傾倒式危巖穩(wěn)定性計算式中：H0—危巖體后緣潛在破壞面高度（m）；H—后緣裂隙上端到未貫通段下端的垂直距離（m）；flk—危巖體抗拉強(qiáng)度標(biāo)準(zhǔn)值（kpa），根據(jù)巖石抗拉強(qiáng)度標(biāo)準(zhǔn)值乘以0.30的折減系數(shù)確定；其它符號意義同前。3）傾倒式a)由后緣巖體抗拉強(qiáng)度控制時（危巖體重心在傾覆點(diǎn)之外），按下式計算：由后緣巖體抗拉強(qiáng)度控制時（危巖體重心在傾覆點(diǎn)之內(nèi)時），按下式計算：圖5-3傾倒式危巖（左、右分別為由后緣、底部抗拉強(qiáng)度控制）式中：h——后緣裂隙深度（m）；hw——后緣裂隙充水高度（m）；a——距離（m）；b——后緣裂隙未貫通段下端到傾覆點(diǎn)之間的水平距離(m)；h0——危巖體重心到傾覆點(diǎn)的垂直距離（m）；flk——危巖體抗拉強(qiáng)度標(biāo)準(zhǔn)值（kPa）；α——危巖體與基座接觸面傾角（°）；β——后緣裂隙傾角（°）。其它符號意義同前。b)由底部巖體抗拉強(qiáng)度控制時，按下式計算，式中符號意義同前。5.3穩(wěn)定性計算結(jié)果雙慶場危巖穩(wěn)定性系數(shù)計算結(jié)果一覽表分區(qū)危巖編號破壞模式防治等級工況穩(wěn)定系數(shù)安全系數(shù)穩(wěn)定狀態(tài)北岸危巖w1傾倒式三級暴雨1.271.30基本穩(wěn)定地震1.081.10欠穩(wěn)定w2墜落式三級暴雨1.371.40基本穩(wěn)定地震1.121.15欠穩(wěn)定w3傾倒式三級暴雨1.261.30基本穩(wěn)定地震1.031.10欠穩(wěn)定w4傾倒式三級暴雨1.281.30基本穩(wěn)定地震1.011.10欠穩(wěn)定w5傾倒式三級暴雨1.251.30基本穩(wěn)定地震1.041.10欠穩(wěn)定w6墜落式三級暴雨1.351.40基本穩(wěn)定地震1.091.15欠穩(wěn)定w7傾倒式三級暴雨1.291.30基本穩(wěn)定地震1.021.10欠穩(wěn)定w8傾倒式三級暴雨1.281.30基本穩(wěn)定地震1.091.10欠穩(wěn)定w9滑移式三級暴雨1.181.20基本穩(wěn)定地震1.021.05欠穩(wěn)定w10滑移式三級暴雨1.161.20基本穩(wěn)定地震1.041.05欠穩(wěn)定w11傾倒式三級暴雨1.271.30基本穩(wěn)定地震1.071.10欠穩(wěn)定w12墜落式三級暴雨1.361.40基本穩(wěn)定地震1.131.15欠穩(wěn)定w13墜落式三級暴雨1.351.40基本穩(wěn)定地震1.081.15欠穩(wěn)定w14墜落式三級暴雨1.231.40欠穩(wěn)定地震1.141.15欠穩(wěn)定w15墜落式三級暴雨1.271.40欠穩(wěn)定地震1.061.15欠穩(wěn)定w16墜落式三級暴雨1.231.40欠穩(wěn)定地震1.151.15欠穩(wěn)定w17傾倒式三級暴雨1.251.30基本穩(wěn)定地震1.081.10欠穩(wěn)定w18傾倒式三級暴雨1.281.30基本穩(wěn)定地震1.081.10欠穩(wěn)定w19傾倒式三級暴雨1.271.30基本穩(wěn)定地震1.061.10欠穩(wěn)定w20墜落式三級暴雨1.371.40基本穩(wěn)定地震1.091.15欠穩(wěn)定w21墜落式三級暴雨1.361.40基本穩(wěn)定地震1.131.15欠穩(wěn)定w22傾倒式三級暴雨1.281.30基本穩(wěn)定地震1.011.10欠穩(wěn)定w23墜落式三級暴雨1.371.40基本穩(wěn)定地震1.141.15欠穩(wěn)定Wb1滑移式三級暴雨1.161.20基本穩(wěn)定地震1.051.05欠穩(wěn)定Wb2墜落式三級暴雨1.391.40基本穩(wěn)定地震1.111.15欠穩(wěn)定w24傾倒式三級暴雨1.181.30欠穩(wěn)定地震1.011.10欠穩(wěn)定Wb3傾倒式三級暴雨1.211.30欠穩(wěn)定地震1.011.10欠穩(wěn)定wb6墜落式三級暴雨1.251.40欠穩(wěn)定地震1.091.15欠穩(wěn)定wb7墜落式三級暴雨1.371.40基本穩(wěn)定地震1.151.15欠穩(wěn)定wb8墜落式三級暴雨1.361.40基本穩(wěn)定地震1.131.15欠穩(wěn)定wb9墜落式三級暴雨1.371.40基本穩(wěn)定地震1.131.15欠穩(wěn)定wb10墜落式三級暴雨1.351.40基本穩(wěn)定地震1.121.15欠穩(wěn)定wb11墜落式三級暴雨1.361.40基本穩(wěn)定地震1.111.15欠穩(wěn)定wb12墜落式三級暴雨1.251.40欠穩(wěn)定地震1.051.15欠穩(wěn)定wb13墜落式三級暴雨1.271.40欠穩(wěn)定地震1.061.15欠穩(wěn)定wb14墜落式三級暴雨1.361.40基本穩(wěn)定地震1.131.15欠穩(wěn)定w25傾倒式三級暴雨1.251.30基本穩(wěn)定地震1.071.10欠穩(wěn)定w26墜落式三級暴雨1.381.40基本穩(wěn)定地震1.141.15欠穩(wěn)定wb15傾倒式三級暴雨1.191.30欠穩(wěn)定地震1.021.10欠穩(wěn)定w27墜落式三級暴雨1.351.40基本穩(wěn)定地震1.121.15欠穩(wěn)定w28滑移式三級暴雨1.171.20基本穩(wěn)定地震1.031.05欠穩(wěn)定w29傾倒式三級暴雨1.281.30基本穩(wěn)定地震1.021.10欠穩(wěn)定w30傾倒式三級暴雨1.261.30基本穩(wěn)定地震1.011.10欠穩(wěn)定wb16滑移式三級暴雨1.181.20基本穩(wěn)定地震1.041.05欠穩(wěn)定wb17傾倒式三級暴雨1.271.30基本穩(wěn)定地震1.061.10欠穩(wěn)定w31傾倒式三級暴雨1.281.30基本穩(wěn)定地震1.051.10欠穩(wěn)定w32墜落式三級暴雨1.361.30基本穩(wěn)定地震1.141.10欠穩(wěn)定wb18滑移式三級暴雨1.171.20基本穩(wěn)定地震1.031.05欠穩(wěn)定w33墜落式三級暴雨1.251.40欠穩(wěn)定地震1.071.15欠穩(wěn)定西岸危巖wx2傾倒式三級暴雨1.281.30基本穩(wěn)定地震1.011.10欠穩(wěn)定w34傾倒式三級暴雨1.221.30欠穩(wěn)定地震1.031.10欠穩(wěn)定wx1傾倒式三級暴雨1.251.30基本穩(wěn)定地震1.031.10欠穩(wěn)定w35墜落式三級暴雨1.371.40基本穩(wěn)定地震1.131.15欠穩(wěn)定wx12傾倒式三級暴雨1.271.30基本穩(wěn)定地震1.011.10欠穩(wěn)定wx11傾倒式三級暴雨1.261.30基本穩(wěn)定地震1.011.10欠穩(wěn)定wx10傾倒式三級暴雨1.251.30基本穩(wěn)定地震1.021.10欠穩(wěn)定wx9傾倒式三級暴雨1.281.30基本穩(wěn)定地震1.011.10欠穩(wěn)定w36傾倒式三級暴雨1.291.30基本穩(wěn)定地震1.071.10欠穩(wěn)定wx8傾倒式三級暴雨1.291.30基本穩(wěn)定地震1.041.10欠穩(wěn)定w37墜落式三級暴雨1.261.40欠穩(wěn)定地震1.041.15欠穩(wěn)定w38傾倒式三級暴雨1.181.30欠穩(wěn)定地震1.021.10欠穩(wěn)定w39墜落式三級暴雨1.371.40基本穩(wěn)定地震1.131.15欠穩(wěn)定w40傾倒式三級暴雨1.211.30欠穩(wěn)定地震1.011.10欠穩(wěn)定wx7傾倒式三級暴雨1.171.30欠穩(wěn)定地震1.011.10欠穩(wěn)定w41傾倒式三級暴雨1.271.30基本穩(wěn)定地震1.071.10欠穩(wěn)定wx25傾倒式三級暴雨1.261.30基本穩(wěn)定地震1.031.10欠穩(wěn)定wx24傾倒式三級暴雨1.271.30基本穩(wěn)定地震1.051.10欠穩(wěn)定w42傾倒式三級暴雨1.291.30基本穩(wěn)定地震1.061.10欠穩(wěn)定w43墜落式三級暴雨1.391.40基本穩(wěn)定地震1.131.15欠穩(wěn)定w44墜落式三級暴雨1.361.40基本穩(wěn)定地震1.131.15欠穩(wěn)定wx21傾倒式三級暴雨1.261.30基本穩(wěn)定地震1.031.10欠穩(wěn)定w45傾倒式三級暴雨1.281.30基本穩(wěn)定地震1.091.10欠穩(wěn)定w46墜落式三級暴雨1.371.40基本穩(wěn)定地震1.121.15欠穩(wěn)定w47傾倒式三級暴雨1.281.30基本穩(wěn)定地震1.081.10欠穩(wěn)定w48傾倒式三級暴雨1.281.30基本穩(wěn)定地震1.091.10欠穩(wěn)定w49傾倒式三級暴雨1.161.30欠穩(wěn)定地震1.011.10欠穩(wěn)定w50傾倒式三級暴雨1.221.30基本穩(wěn)定地震1.061.10欠穩(wěn)定w51傾倒式三級暴雨1.261.30基本穩(wěn)定地震1.071.10欠穩(wěn)定w52墜落式三級暴雨1.351.40基本穩(wěn)定地震1.101.15欠穩(wěn)定w53傾倒式三級暴雨1.291.30基本穩(wěn)定地震1.031.10欠穩(wěn)定w54傾倒式三級暴雨1.251.30基本穩(wěn)定地震1.041.10欠穩(wěn)定w55滑移式三級暴雨1.161.20基本穩(wěn)定地震1.031.05欠穩(wěn)定wx22滑移式三級暴雨1.171.20基本穩(wěn)定地震1.041.05欠穩(wěn)定w56滑移式三級暴雨1.131.20欠穩(wěn)定地震1.041.05欠穩(wěn)定w57滑移式三級暴雨1.121.20欠穩(wěn)定地震1.011.05欠穩(wěn)定w58傾倒式三級暴雨1.131.30欠穩(wěn)定地震1.001.10欠穩(wěn)定w59墜落式三級暴雨1.391.40基本穩(wěn)定地震1.141.15欠穩(wěn)定w60滑移式三級暴雨1.191.20基本穩(wěn)定地震1.041.05欠穩(wěn)定wx35墜落式三級暴雨1.261.40欠穩(wěn)定地震1.061.15欠穩(wěn)定wx34墜落式三級暴雨1.351.40基本穩(wěn)定地震1.111.15欠穩(wěn)定wx33墜落式三級暴雨1.271.40欠穩(wěn)定地震1.041.15欠穩(wěn)定w61墜落式三級暴雨1.371.40基本穩(wěn)定地震1.121.15欠穩(wěn)定東岸危巖wd2滑移式三級暴雨1.181.20基本穩(wěn)定地震1.041.05欠穩(wěn)定wd3滑移式三級暴雨1.191.20基本穩(wěn)定地震1.031.05欠穩(wěn)定w62傾倒式三級暴雨1.271.30基本穩(wěn)定地震1.091.10欠穩(wěn)定wd4墜落式二級暴雨1.261.50欠穩(wěn)定地震1.061.20欠穩(wěn)定w63墜落式二級暴雨1.271.50欠穩(wěn)定地震1.081.20欠穩(wěn)定wd5墜落式二級暴雨1.341.50欠穩(wěn)定地震1.171.20欠穩(wěn)定wd6墜落式二級暴雨1.321.50欠穩(wěn)定地震1.141.20欠穩(wěn)定wd7滑移式二級暴雨1.131.30欠穩(wěn)定地震1.071.10欠穩(wěn)定wd8墜落式二級暴雨1.231.50欠穩(wěn)定地震1.171.20欠穩(wěn)定wd9墜落式二級暴雨1.381.50基本穩(wěn)定地震1.191.20欠穩(wěn)定wd10墜落式二級暴雨1.401.50基本穩(wěn)定地震1.181.20欠穩(wěn)定wd11墜落式二級暴雨1.411.50基本穩(wěn)定地震1.191.20欠穩(wěn)定6危巖加固計算6.1危巖錨固計算根據(jù)勘查結(jié)論，危巖破壞模式為滑移式、傾倒式，傾倒式危巖錨固計算中考慮荷載組合①和②。以W3危巖單體為例，進(jìn)行計算。（其余錨桿計算見匯總表）。只有荷載組合②為不穩(wěn)定狀態(tài)，所以考慮荷載組合②，治理后要求Ks≥1.3，令P為剩余傾覆力矩，則：P=293.38KN·m，擬設(shè)置錨桿排數(shù)1排，錨桿提供的水平力N：N=P/L，L為力臂；帶入有：N=45.14KN/m，錨桿所受軸向力Nak=N/cosα=48.03KN/m（1）錨桿鋼筋截面面積的確定錨桿鋼筋截面面積應(yīng)滿足下式的要求：As≥2*sqrt(1000×(Nak×Kb)/(Π×n×fyk))+δ×T式中：n—單個錨點(diǎn)的錨桿鋼筋根數(shù)；Nak—錨桿軸向拉力標(biāo)準(zhǔn)值；Kb—錨桿桿體抗力安全系數(shù)，取1.67；fyk—錨筋抗拉強(qiáng)度標(biāo)準(zhǔn)值值（kPa）；δ-錨桿鋼材銹蝕速度，取0.04mm/a；T-工程設(shè)計使用年限。（本次設(shè)計取50a）代入有：As≥477.626mm2取鋼筋為：1Φ25，As=490.9mm2﹥477.626mm2滿足要求。（2）錨桿錨固長度的確定a.錨桿錨固體與地層的錨固長度應(yīng)滿足下式要求：la≥（K×Nak）÷(Π×D×frb)式中：la—錨固段長度(m)；D—錨固體直徑（m）;frb—地層與錨固體粘結(jié)強(qiáng)度特征值（kPa）；K—錨桿抗拔安全系數(shù)，取2.0。取錨桿材料為Φ90，則有：ls≥0.70m,b.錨桿錨固體與水泥砂漿的錨固長度應(yīng)滿足下式要求：la≥（K×Nak）÷(Π×ds×fbk)式中：la—錨固段長度(m)；ds—錨桿等效直徑（m）;fbk—錨桿與水泥砂漿之間粘結(jié)強(qiáng)度特征值（kPa）；計算得到：ls≥0.58m,根據(jù)上述計算，取錨固長度ls=3m，滿足要求。綜上所述：對于W3危巖采用錨桿Φ90，1Φ25，滿足要求。其余錨桿計算如下表所示：傾倒式危巖剩余力矩計算：危巖

編號計算工況危巖重度γ（kN/m3）危巖體積S(m3)危巖自重G（kN/m）接觸面傾角α(°)水重度γw（kN/m3）后緣傾角β(°)高度H（m）后緣裂隙深度h（m）后緣裂隙寬度B1（m）重心到傾覆點(diǎn)水平距離外為正內(nèi)為負(fù)a（m）后緣裂隙未貫通段下端到傾覆點(diǎn)水平距離b（m）充水高度hw（m）充水寬度Bw（m）裂隙水壓力V（kN）抗彎力矩計算系數(shù)ζ巖體抗拉強(qiáng)度σt(kPa)地震力Q（kN）重心到傾覆點(diǎn)垂直h0（m）穩(wěn)定系數(shù)F剩余傾覆力矩（kN.m）防治工程等級安全系數(shù)FsW1地震25.50320.008160.0010.00108084.000.90.1140.20.50.100.08462.0040841.08327.98三級1.10暴雨25.50320.008160.0010.00108084.000.90.1140.20.50.100.08462.0041.274.86三級1.30W3地震25.50640.0016320.0018.00108582.251.80.233.002.031.633.220.08462.0081641.03293.38三級1.10暴雨25.50640.0016320.0018.00108582.251.80.233.002.031.633.220.08462.0041.2629.03三級1.30W4地震25.50210.005355.005.00108561.201.80.463.501.081.69.450.08462.00267.7531.01217.79三級1.10暴雨25.50210.005355.005.00108561.201.80.463.501.081.69.450.08462.0031.2811.12三級1.30W5地震25.501056.0026928.001.00108581.001.80.206.000.91.66.560.08462.001346.441.04102.25三級1.10暴雨25.501056.0026928.001.00108581.001.80.206.000.91.66.560.08462.0041.2555.13三級1.30W7地震25.503360.0085680.0012.00108516.82.201.50.238.001.21.49.720.08462.0042848.41.021071.46三級1.10暴雨25.503360.0085680.0012.00108516.82.201.50.238.001.21.49.720.08462.008.41.2921.30三級1.30W8地震25.50240.006120.0015.00108582.501.60.505.0011.47.200.08462.0030641.09389.21三級1.10暴雨25.50240.006120.0015.00108582.501.60.505.0011.47.200.08462.0041.2811.00三級1.30W11地震25.5060.001530.0010.00108562.402.451.302.500.222.20.530.08462.0076.531.14-15.60三級1.10暴雨25.5060.001530.0010.00108562.402.451.302.500.222.20.530.08462.0031.2713.56三級1.30W17地震25.5072.001836.005.00108541.800.80.133.000.40.70.580.08462.0091.821.12165.90三級1.10暴雨25.5072.001836.005.00108541.800.80.133.000.40.70.580.08462.0021.2512.00三級1.30W18地震25.5072.001836.005.00108563.501.520.313.000.51.41.710.08462.0091.831.1339.59三級1.10暴雨25.5072.001836.005.00108563.501.520.313.000.51.41.710.08462.0031.281.98三級1.30W19地震25.501680.0042840.0010.001080164.701.50.287.000.31.40.610.08462.00214281.061347.76三級1.10暴雨25.501680.0042840.0010.001080164.701.50.287.000.31.40.610.08462.0081.2779.62三級1.30W22地震25.5090.002295.005.00108063.201.080.222.500.751.02.730.08462.00114.7531.1157.67三級1.10暴雨25.5090.002295.005.00108063.201.080.222.500.751.02.730.08462.0031.282.54三級1.30W24地震25.50100.002550.0018.00108084.001.40.732.500.41.31.010.08462.00127.541.01141.56三級1.10暴雨25.50100.002550.0018.00108084.001.40.732.500.41.31.010.08462.0041.02104.04三級1.30Wb3地震25.5072.001836.0015.00108063.6020.503.000.31.80.810.08462.0091.831.0173.09三級1.10暴雨25.5072.001836.0015.00108063.6020.503.000.31.80.810.08462.0031.0349.35三級1.30W25地震25.50285.007267.501.00108063.601.850.092.500.31.70.750.08462.00363.3831.07108.14三級1.10暴雨25.50285.007267.501.00108063.601.850.092.500.31.70.750.08462.0031.256.49三級1.30wb15地震25.50180.004590.001.001080103.501.040.723.000.350.90.570.08462.00229.551.02303.54三級1.10暴雨25.50180.004590.001.001080103.501.040.723.000.350.90.570.08462.0051.02183.45三級1.30W29地震25.50432.0011016.0013.00108063.351.50.066.000.51.41.690.08462.00550.831.02255.02三級1.10暴雨25.50432.0011016.0013.00108063.351.50.066.000.51.41.690.08462.0031.283.29三級1.30W30地震25.50320.008160.0012.001080105.000.410.084.000.40.40.300.08462.0040851.01227.87三級1.10暴雨25.50320.008160.0012.001080105.000.410.084.000.40.40.300.08462.0051.265.26三級1.30W31地震25.50240.006120.0010.00108083.100.50.125.000.80.51.440.08462.0030641.05242.44三級1.10暴雨25.50240.006120.0010.00108083.100.50.125.000.80.51.440.08462.0041.282.93三級1.30wb17地震25.50112.002856.0013.00108541.000.50.104.000.50.50.560.08462.00142.821.12266.10三級1.10暴雨25.50112.002856.0013.00108541.000.50.104.000.50.50.560.08462.0021.279.56三級1.30wx2地震25.50720.0018360.005.001085154.520.50.186.000.90.51.820.08462.009187.51.01745.76三級1.10暴雨25.50720.0018360.005.001085154.520.50.186.000.90.51.820.08462.007.51.2812.70三級1.30W34地震25.5012.00306.0010.00108542.400.830.541.500.250.70.230.08462.0015.321.019.45三級1.10暴雨25.5012.00306.0010.00108542.400.830.541.500.250.70.230.08462.0021.029.35三級1.30wx1地震25.50450.0011475.0018.001085157.501.50.505.000.61.42.430.08462.00573.757.51.03677.61三級1.10暴雨25.50450.0011475.0018.001085157.501.50.505.000.61.42.430.08462.007.51.2561.38三級1.30wx12地震25.503300.0084150.005.001085255.001.80.526.000.61.62.920.08462.004207.512.51.011803.82三級1.10暴雨25.503300.0084150.005.001085255.001.80.526.000.61.62.920.08462.0012.51.27220.38三級1.30wx11地震25.501320.0033660.0010.001085226.001.80.866.001.11.69.800.08462.001683111.011930.56三級1.10暴雨25.501320.0033660.0010.001085226.001.80.866.001.11.69.800.08462.00111.26255.31三級1.30wx10地震25.501056.0026928.001.001085221.201.781.756.001.081.69.340.08462.001346.4111.021807.38三級1.10暴雨25.501056.0026928.001.001085221.201.781.756.001.081.69.340.08462.00111.25442.22三級1.30wx9地震25.503300.0084150.000.001085222.001.40.406.000.81.34.030.08462.004207.5111.011498.19三級1.10暴雨25.503300.0084150.000.001085222.001.40.406.000.81.34.030.08462.00111.28149.48三級1.30W36地震25.50768.0019584.000.001085162.501.81.006.000.751.64.560.08462.00979.281.07694.26三級1.10暴雨25.50768.0019584.000.001085162.501.81.006.000.751.64.560.08462.0081.2956.84三級1.30wx8地震25.505280.00134640.0012.001085302.101.80.658.000.81.65.180.08462.006732151.042095.17三級1.10暴雨25.505280.00134640.0012.001085302.101.80.658.000.81.65.180.08462.00151.29243.09三級1.30W38地震25.50720.0018360.005.001085152.001.61.108.000.61.42.590.08462.009187.51.021327.60三級1.10暴雨25.50720.0018360.005.001085152.001.61.108.000.61.42.590.08462.007.51.041064.80三級1.30W40地震25.50648.0016524.0010.001085184.0021.806.000.51.82.250.08462.00826.291.01872.03三級1.10暴雨25.50648.0016524.0010.001085184.0021.806.000.51.82.250.08462.0091.051517.98三級1.30wx7地震25.502880.0073440.0015.001085245.001.820.728.001.61.620.970.08462.003672121.012646.48三級1.10暴雨25.502880.0073440.0015.001085245.001.820.728.001.61.620.970.08462.00121.023025.74三級1.30W41地震25.503840.0097920.0012.001085246.001.20.258.001.21.17.780.08462.004896121.072722.17三級1.10暴雨25.503840.0097920.0012.001085246.001.20.258.001.21.17.780.08462.00121.27148.94三級1.30wx25地震25.50900.0022950.005.001085155.641.20.286.0011.15.400.08462.001147.57.51.03644.24三級1.10暴雨25.50900.0022950.005.001085155.641.20.286.0011.15.400.08462.007.51.2654.47三級1.30wx24地震25.501152.0029376.000.001085166.001.460.306.000.61.32.370.08462.001468.881.05540.55三級1.10暴雨25.501152.0029376.000.001085166.001.460.306.000.61.32.370.08462.0081.2749.55三級1.30W42地震25.50288.007344.0015.001085126.001.80.564.000.81.65.180.08462.00367.261.06288.71三級1.10暴雨25.50288.007344.0015.001085126.001.80.564.000.81.65.180.08462.0061.2910.11三級1.30wx21地震25.501440.0036720.0012.001085166.001.50.266.000.91.45.470.08462.00183681.031465.99三級1.10暴雨25.501440.0036720.0012.001085166.001.50.266.000.91.45.470.08462.0081.2685.15三級1.30W45地震25.50108.002754.008.00108563.751.80.203.000.51.62.030.08462.00137.731.0970.34三級1.10暴雨25.50108.002754.008.00108563.751.80.203.000.51.62.030.08462.0031.281.74三級1.30W47地震25.50105.002677.502.001085105.001.440.803.500.81.34.150.08462.00133.8851.0868.64三級1.10暴雨25.50105.002677.502.001085105.001.440.803.500.81.34.150.08462.0051.288.00三級1.30W48地震25.5060.001530.000.00108563.4720.502.500.51.82.250.08462.0076.531.1023.09三級1.10暴雨25.5060.001530.000.00108563.4720.502.500.51.82.250.08462.0031.283.46三級1.30W49地震25.50336.008568.000.001085124.501.70.853.500.81.54.900.08462.00428.460.98403.81三級1.10暴雨25.50336.008568.000.001085124.501.70.853.500.81.54.900.08462.0061.01431.22三級1.30W50地震25.50120.003060.002.00108563.051.510.272.500.51.41.700.08462.0015331.06103.53三級1.10暴雨25.50120.003060.002.00108563.051.510.272.500.51.41.700.08462.0031.2213.71三級1.30W51地震25.50240.006120.003.001085105.000.560.144.000.50.50.630.08462.0030651.07209.70三級1.10暴雨25.50240.006120.003.001085105.000.560.144.000.50.50.630.08462.0051.267.52三級1.30W53地震25.50900.0022950.002.501085104.201.50.136.000.81.44.320.08462.001147.551.03373.29三級1.10暴雨25.50900.0022950.002.501085104.201.50.136.000.81.44.320.08462.0051.294.87三級1.30W54地震25.50288.007344.0010.00108583.901.80.266.500.61.62.920.08462.00367.241.04186.62三級1.10暴雨25.50288.007344.0010.00108583.901.80.266.500.61.62.920.08462.0041.2520.56三級1.30W58地震25.501584.0040392.000.001085227.2010.406.0010.94.500.08462.002019.6111.001833.71三級1.10暴雨25.501584.0040392.000.001085227.2010.406.0010.94.500.08462.00111.04845.94三級1.30W62地震25.50240.006120.008.00108583.000.60.153.950.80.51.730.08462.0030641.09178.03三級1.10暴雨25.50240.006120.008.00108583.000.60.153.950.80.51.730.08462.0041.275.90三級1.30傾倒式危巖剩余力矩轉(zhuǎn)換計算：危巖編號剩余力矩錨桿合力點(diǎn)距離傾覆點(diǎn)垂直距離擬設(shè)錨桿排數(shù)錨桿水平間距錨桿傾角錨桿所受水平拉力標(biāo)準(zhǔn)值錨桿軸向拉力標(biāo)準(zhǔn)值KN·mmm°KNKNW3293.386.5012.52045.1353848.03207W71071.468.0022.52066.9662571.26399W191347.7612.0022.52056.1566759.76068W25108.143.5012.52030.8971432.88005W30227.977.0012.52032.5671434.65723W31242.446.0012.52040.4066742.99988WX2745.7610.0012.52074.57679.36212WX1677.6110.5012.52064.5342968.67595WX121803.8218.0012.520100.212106.644WX111930.5615.0022.52064.35268.48197WX101807.3715.0022.52060.2456764.1121WX91498.1918.5012.52080.983286.1806W36694.2611.0022.52031.5572733.58255WX82095.1716.0032.52043.6493846.45069W381327.610.0022.52066.3870.64012W40872.0313.0022.52033.5396235.69211WX72646.4817.0032.52051.8917655.22206W412722.1717.0022.52080.0638285.20214WX25644.2410.0012.52064.42468.55859WX24540.559.0012.52060.0611163.9157W42288.719.0012.52032.0788934.13764WX211465.9911.0012.520133.272141.825W49403.817.0022.52028.8435730.69469W50103.534.5012.52023.0066724.48318W51209.77.5012.52027.9629.75441W53373.296.0012.52062.21566.20782W54186.626.0012.52031.1033333.09948W581833.7116.0012.520114.6069121.9621W62178.036.0012.52029.6716731.57593傾倒式危巖錨桿計算：危巖編號鋼筋直徑(mm)錨桿桿體抗拉安全系數(shù)Kb錨筋抗拉強(qiáng)度設(shè)計值fy(KPa)錨桿軸向拉力標(biāo)準(zhǔn)值Nak(KN)錨桿傾角α(°)錨桿所受水平拉力標(biāo)準(zhǔn)值Htk(KN)單個錨點(diǎn)的鋼筋根數(shù)-n錨桿鋼材腐蝕速度-δ工程使用設(shè)計年限-T錨固段長度La(m)Nak錨桿錨固體抗拔安全系數(shù)Kπ錨固體直徑D(m)巖層與錨固體極限粘結(jié)強(qiáng)度標(biāo)準(zhǔn)值frbk(KPa)W318.841.6736048.032045.1410.04500.2848.0323.140.091200W722.521.6736071.262066.9710.04500.4271.2623.140.091200W1920.791.6736059.762056.1610.04500.3559.7623.140.091200W2515.941.6736032.882030.9010.04500.1932.8823.140.091200W3016.311.6736034.662032.5710.04500.2034.6623.140.091200W3117.941.6736043.002040.4110.04500.2543.0023.140.091200WX223.651.6736079.362074.5810.04500.4779.3623.140.091200WX122.141.6736068.682064.5310.04500.4068.6823.140.091200WX1219.751.67360106.6420100.2120.04500.44106.6423.140.131200WX1122.111.6736068.482064.3510.04500.4068.4823.140.091200WX1021.461.6736064.112060.2510.04500.3864.1123.140.091200WX917.951.6736086.182080.9820.04500.3586.1823.140.131200W3616.081.6736033.582031.5610.04500.2033.5823.140.091200WX818.561.6736046.452043.6510.04500.2746.4523.14