地鐵區(qū)間暗挖法施工隧道結(jié)構(gòu)設(shè)計(jì)計(jì)算書

地鐵區(qū)間暗挖法施工隧道結(jié)構(gòu)設(shè)計(jì)計(jì)算書一、設(shè)計(jì)任務(wù)對(duì)某區(qū)間隧道進(jìn)行結(jié)構(gòu)檢算，求出內(nèi)力，并進(jìn)行配筋計(jì)算。具體設(shè)計(jì)基本資料如下：1.1工程地質(zhì)條件線路垂直于永定河沖、洪積扇的軸部，第四紀(jì)地層沉積韻律明顯，地層由上到下依次為：雜填土、粉土、細(xì)砂、圓礫土、粉質(zhì)粘土、卵石土。其主要物理力學(xué)指標(biāo)如表1，本地區(qū)地震烈度為7度。表1各層土的物理力學(xué)指標(biāo)土的類型厚度（m）重度γ（kN/mm3）彈性抗力系數(shù)(MMpa/m）變形模量E（GPPa）泊松比μ內(nèi)摩擦角ф（o）粘聚力C(Mpaa)雜填土5.916500.80.4200.005粉土3.218900.90.35210.01細(xì)砂4.9191001.20.32220.01圓礫土9.819.51201.50.32250.01粉質(zhì)粘土5.220.01501.80.32230.02卵石土6.720.02002.00.30270.03基巖223002.50.35350.041.2其他條件地下水位在地面以下4.2處；隧道頂板埋深10.7m；采用暗挖法施工，隧道斷面型式為5心圓馬蹄形結(jié)構(gòu)。二、設(shè)計(jì)過(guò)程2.1根據(jù)給定的隧道或車站埋深判斷結(jié)構(gòu)深、淺埋；可以采用《鐵路隧道設(shè)計(jì)規(guī)范》推薦的方法，即有上式中s為圍巖的級(jí)別；B為洞室的跨度；i為B每增加1m時(shí)的圍巖壓力增減率。由于隧道拱頂埋深10.7m，位于粉土層、細(xì)砂層和圓礫土中，根據(jù)《地鐵設(shè)計(jì)規(guī)范》10.1.2可知“暗挖結(jié)構(gòu)的圍巖分級(jí)按現(xiàn)行《鐵路隧道設(shè)計(jì)規(guī)范》確定”。圍巖為Ⅵ級(jí)圍巖。則有=0.45=15.84m因?yàn)槁裆?c=10.7m2.2計(jì)算作用在結(jié)構(gòu)上的荷載；1永久荷載A頂板上永久荷載a.頂板自重（可只考慮二襯）q=γ.d=25×0.3=7.5KPab.地層豎向土壓力由于拱頂埋深10.7m，則頂上土層有雜填土、粉土、細(xì)砂，且地下水埋深4.2m，應(yīng)考慮土層壓力和地下水壓力的影響。q=4.2×16+=169.4KPac.地層豎向水壓力qB底板上永久荷載a.底板自重q=γ.d=25×0.3=7.5KPab.水壓力（向上）：qC側(cè)墻上永久荷載地層側(cè)向壓力按主動(dòng)土壓力的方法計(jì)算，由于埋深在地下水位以下，需考慮地下水的影響。(為簡(jiǎn)化計(jì)算，按水土分算)a.側(cè)墻自重q=γ.d=25×5=125KPab.對(duì)于隧道側(cè)墻上部土壓力：用朗肯主動(dòng)土壓力方法計(jì)算Ka=tanq==77.07KPac.對(duì)于隧道側(cè)墻圖層分界處土壓力KaKaq=4.2×16+1.7×q=d.對(duì)于隧道圓心高度土壓力q=4.2×16+1.7×e.對(duì)于隧道側(cè)墻底部土壓力Ka=tan==112.76KPaf.對(duì)于隧道側(cè)墻水壓力qq2可變荷載A頂板上可變荷載按《地鐵設(shè)計(jì)規(guī)范》10.2.1中第三條規(guī)定：在道路下面的潛埋暗挖隧道，地面的車輛荷載按10KPa的均布荷載取值，并不計(jì)動(dòng)力作用影響。人行荷載可以不用考慮。B底板上可變荷載主要為列車車輛運(yùn)行的可變荷載，一般取為C側(cè)墻上可變荷載由于到隧道上部地面車輛的運(yùn)行，會(huì)導(dǎo)致側(cè)向壓力的增大：q3偶然荷載在本設(shè)計(jì)中，僅考慮比較簡(jiǎn)單的情況，偶然荷載可以不用計(jì)算。2.3進(jìn)行荷載組合1、承載能力極限狀態(tài)荷載組合采用1.2恒載+1.4活載根據(jù)以上各種計(jì)算，作用在隧道上的設(shè)計(jì)荷載有：拱頂：設(shè)計(jì)恒載：-290.3KPa設(shè)計(jì)活載：-14KPa底板：設(shè)計(jì)恒載：148.6KPa設(shè)計(jì)活載：-7KPa側(cè)墻（頂部）：設(shè)計(jì)恒載：170.5KPa（x方向；-150KPa（y方向）設(shè)計(jì)活載：5.81KPa（x方向）；-175KPa（y方向）（底部）：設(shè)計(jì)恒載：292.6KPa（x方向）；-150KPa（y方向）設(shè)計(jì)活載：3.262KPa（x方向）；-175KPa（y方向）2、正常使用極限狀態(tài)荷載組合采用恒載+活載根據(jù)以上各種計(jì)算，作用在隧道上的設(shè)計(jì)荷載有：拱頂：設(shè)計(jì)恒載：-241.9KPa設(shè)計(jì)活載：-10KPa底板：設(shè)計(jì)恒載：123.8KPa設(shè)計(jì)活載：-5KPa側(cè)墻（頂部）：設(shè)計(jì)恒載：142.1KPa（x方向；-125KPa（y方向）設(shè)計(jì)活載：4.15KPa（x方向）；-125KPa（y方向）（底部）：設(shè)計(jì)恒載：243.8KPa（x方向）；-125KPa（y方向）設(shè)計(jì)活載：2KPa（x方向）；-125KPa（y方向）2.4繪出結(jié)構(gòu)受力圖根據(jù)荷載組合值，可以分別計(jì)算出拱頂、底板、側(cè)墻和中墻的設(shè)計(jì)荷載值，如下圖：2.5利用midas程序計(jì)算結(jié)構(gòu)內(nèi)力首先應(yīng)進(jìn)行單元?jiǎng)澐?，然后定義荷載和截面，加入邊界條件。在midas程序中施加各類荷載，然后運(yùn)行后就可得到單元內(nèi)力，彎矩圖和軸力圖（如下）。承載能力極限狀態(tài)隧道斷面的彎矩圖隧道斷面的軸力圖正常使用極限狀態(tài)2.6結(jié)構(gòu)配筋計(jì)算和截面配筋圖繪制（隧道結(jié)構(gòu)取最不利截面配筋）1.配筋計(jì)算經(jīng)過(guò)計(jì)算，可知中墻頂部為最不利位置，沿隧道縱向取1m的計(jì)算單元，彎矩最大為204.05kN.m，軸力為383.55kN，以此截面為控制截面進(jìn)行配筋，為簡(jiǎn)便計(jì)算，可以對(duì)稱配筋。由于截面長(zhǎng)度b=1.0m，高度h=0.4m，計(jì)算長(zhǎng)度L=0.5m，由于鋼筋采用二級(jí)HRB335，混凝土C30，保護(hù)層厚度為50mm，相對(duì)界限受壓區(qū)高度。偏心距受壓區(qū)高度可以采用，，滿足間距要求（如右圖）。對(duì)于中墻，承受壓力較大，為883kN,而且彎矩非常小，可看作軸心受壓構(gòu)件。2.裂縫驗(yàn)算裂縫驗(yàn)算公式：由于是偏心受壓構(gòu)件：，其中，則有此時(shí)裂縫不滿足要求，可以增加鋼筋截面面積，經(jīng)重新設(shè)計(jì)驗(yàn)算，取則有由于在裂縫計(jì)算中是要求用標(biāo)準(zhǔn)荷載，而現(xiàn)在是用設(shè)計(jì)荷載進(jìn)行計(jì)算，結(jié)果稍微有一些出入，但強(qiáng)度和裂縫都能得到滿足。最后的截面配筋圖如下：參考資料：[1]《地鐵設(shè)計(jì)規(guī)范》GB50157—2003[2]《鐵路隧道設(shè)計(jì)規(guī)范》TB10003—2005[3]賀少輝《地下工程》2008年版北京交通大學(xué)出版社、清華大學(xué)出版社[4]關(guān)寶樹《地下工程》2007年版高等教育出版社[5]李志業(yè)、曾艷華《地下結(jié)構(gòu)設(shè)計(jì)原理與方法》2005年版西南交通大學(xué)出版社[6]曾亞武《地下結(jié)構(gòu)設(shè)計(jì)原理》2006年版武漢大學(xué)出版社[7]程文襄、王王鐵成《混凝凝土結(jié)構(gòu)》20088年版中國(guó)國(guó)建筑工業(yè)出出版社三、附錄3.1.《地下下結(jié)構(gòu)課程設(shè)設(shè)計(jì)》任務(wù)書書——地鐵區(qū)間隧道道結(jié)構(gòu)設(shè)計(jì)本次地下結(jié)構(gòu)課程程設(shè)計(jì)是進(jìn)行行城市地鐵區(qū)區(qū)間隧道的結(jié)結(jié)構(gòu)設(shè)計(jì)，涉涉及“地下工工程”這門課課的主要理論論，通過(guò)設(shè)計(jì)計(jì)，使學(xué)生更更深入地掌握握所學(xué)理論。一、基本要求對(duì)設(shè)計(jì)從全局上把把握，思路清清晰，獨(dú)立完完成全部設(shè)計(jì)計(jì)任務(wù)；設(shè)計(jì)計(jì)算正確無(wú)誤誤，圖紙清晰晰，符合規(guī)范范要求；按計(jì)劃及時(shí)上交設(shè)設(shè)計(jì)，每位同同學(xué)的計(jì)算參參數(shù)不同，如如發(fā)現(xiàn)抄襲者者，將記為零零分。二、設(shè)計(jì)任務(wù)對(duì)某區(qū)間隧道進(jìn)行行結(jié)構(gòu)檢算，求求出內(nèi)力，并并進(jìn)行配筋計(jì)計(jì)算。具體設(shè)設(shè)計(jì)基本資料料如下：1、工程地質(zhì)條件線路垂直于永定河河沖、洪積扇的軸軸部，第四紀(jì)紀(jì)地層沉積韻韻律明顯，地地層由上到下下依次為：雜雜填土、粉土土、細(xì)砂、圓圓礫土、粉質(zhì)質(zhì)粘土、卵石石土。其主要要物理力學(xué)指指標(biāo)如表1，本本地區(qū)地震烈烈度為7度。表1各各層土的物理理力學(xué)指標(biāo)土的類型厚度（m）天然重度γ（kNN/m3）飽和重度γ（kNN/m3）彈性抗力系數(shù)(MMpa/m）變形模量E（GPPa）泊松比μ內(nèi)摩擦角ф（o）粘聚力C(Mpaa)雜填土3.01624500.80.4200.005粉土4.01826900.90.35210.01細(xì)砂5.019271001.20.32220.01圓礫土3.519.527.51201.50.32250.01粉質(zhì)粘土6.020.0281501.80.32230.02卵石土10.020.028.52002.00.30270.03基巖223002.50.35350.042、其他條件地下水位在地面以以下5m處；隧道拱頂頂埋深6m；采用暗暗挖法施工，隧隧道斷面型式式為雙聯(lián)拱結(jié)結(jié)構(gòu)（隧道斷斷面圖QJ110-JG--04）。三、設(shè)計(jì)過(guò)程根據(jù)給定的隧道或或車站埋深判判斷結(jié)構(gòu)深、淺淺埋；計(jì)算作用在結(jié)構(gòu)上上的荷載（僅僅按使用階段段考慮）；進(jìn)行荷載組合；繪出結(jié)構(gòu)受力圖；；利用Frame或或Sap或ANSYSS或其他程序序計(jì)算結(jié)構(gòu)內(nèi)內(nèi)力；結(jié)構(gòu)配筋計(jì)算和截截面配筋圖繪繪制；（隧道道結(jié)構(gòu)取最不不利截面配筋筋）提交完整的設(shè)計(jì)書書。四、成果提交成果包括兩部分：：計(jì)算書和圖圖紙。計(jì)算書書應(yīng)規(guī)范，包包括設(shè)計(jì)基本本資料、詳細(xì)細(xì)的計(jì)算過(guò)程程、結(jié)構(gòu)受力力圖、內(nèi)力圖圖、配筋計(jì)算算。圖紙應(yīng)清清晰，各項(xiàng)計(jì)計(jì)算符合規(guī)范范要求且應(yīng)列列出參考文獻(xiàn)獻(xiàn)。3.2Framme結(jié)構(gòu)程序054,55,0,,0,2,11,1,1,,1,11,1,0.01169,-00.180882,1,0.39986,-22.172553,1,1.05595,-22.332004,1,1.72231,-22.465115,1,2.40000,-22.522556,1,3.10000,-22.482667,1,3.77785,-22.355888,1,4.35532,-22.150339,1,4.77737,-11.7079910,1,4.99545,--1.1622011,1,5.00842,--0.5688012,1,5.11230,--0.0244313,1,5.11329,00.5093314,1,5.00526,11.0539915,1,4.88758,11.5641116,1,4.66299,11.9769917,1,4.22781,22.3816618,1,3.88821,22.6848819,1,3.33469,22.9436620,1,2.77499,33.0758821,1,2.00407,33.0537722,1,1.44345,22.8667723,1,0.99262,22.5663324,1,0.55072,22.1630025,1,0.00071,11.8486626,1,-0..5072,,2.1633027,1,-0..9262,,2.5666328,1,-1..4345,,2.8666729,1,-2..0407,,3.0533730,1,-2..7499,,3.0755831,1,-3..3469,,2.9433632,1,-3..8821,,2.6844833,1,-4..2781,,2.3811634,1,-4..6299,,1.9766935,1,-4..8758,,1.5644136,1,-5..0526,,1.0533937,1,-5..1329,,0.5099338,1,-5..1230,,-0.0224339,1,-5..0842,,-0.5668040,1,-4..9545,,-1.1662041,1,-4..7737,,-1.7007942,1,-4..3532,,-2.1550343,1,-3..7785,,-2.3555844,1,-3..1000,,-2.4882645,1,-2..4000,,-2.5222546,1,-1..7231,,-2.4665147,1,-1..0595,,-2.3222048,1,-0..3986,,-2.1772549,1,0.00,-1.3390450,1,0.00,-0.8813451,1,0.00,-0.2223652,1,0.00,0.3332653,1,0.00,0.9664654,1,0.00,1.522081,1,1,22,1,2,33,1,3,44,1,4,55,1,5,66,1,6,77,1,7,88,1,8,99,1,9,10010,1,10,,1111,1,11,,1212,1,12,,1313,1,13,,1414,1,14,,1515,1,15,,1616,1,16,,1717,1,17,,1818,1,18,,1919,1,19,,2020,1,20,,2121,1,21,,2222,1,22,,2323,1,23,,2424,1,24,,2525,1,25,,2626,1,26,,2727,1,27,,2828,1,28,,2929,1,29,,3030,1,30,,3131,1,31,,3232,1,32,,3333,1,33,,3434,1,34,,3535,1,35,,3636,1,36,,3737,1,37,,3838,1,38,,3939,1,39,,4040,1,40,,4141,1,41,,4242,1,42,,4343,1,43,,4444,1,44,,4545,1,45,,4646,1,46,,4747,1,47,,4848,1,48,,149,1,1,44950,1,49,,5051,1,50,,5152,1,51,,5253,1,52,,5354,1,53,,5455,1,54,,253.0e7,1..25e7,,5.3333e-3,00.4,1..2,1.22e5,0,,0,0,00.4,0..23.0e7,1..25e7,,10.4117e-3,,0.5,11.2,1..2e5,00,0,0,,0.5,00.251,1,1,22,1,1,23,1,1,24,1,1,25,1,1,26,1,1,27,1,1,28,1,1,29,1,1,210,1,1,2211,1,1,2212,1,1,2213,1,1,2214,1,1,2215,1,1,2216,1,1,2217,1,1,1118,1,1,1119,1,1,1120,1,1,1121,1,1,1122,1,1,1123,1,1,1124,1,1,1125,1,1,1126,1,1,1127,1,1,1128,1,1,1129,1,1,1130,1,1,1131,1,1,1132,1,1,1133,1,1,2234,1,1,2235,1,1,2236,1,1,2237,1,1,2238,1,1,2239,1,1,2240,1,1,2241,1,1,2242,1,1,2243,1,1,2244,1,1,2245,1,1,2246,1,1,2247,1,1,2248,1,1,2249,1,2,1150,1,2,1151,1,2,1152,1,2,1153,1,2,1154,1,2,1155,1,2,113,551,0,68..82,0,,0,12,0,68..82,0,,0,13,0,68..82,0,,0,14,0,61.882,0,00,15,-208.5532,611.82,00,0,16,-206.6642,611.82,00,0,17,-202.8882,688.82,00,0,18,-195.5542,-221,0,00,19,-184.3352,--21,0,,0,110,-174..572,-21,00,0,111,-158..552,-21,00,0,112,-146..352,-21,00,0,113,-134..142,-21,00,0,114,-122..202,-21,00,0,115,-111..752,-21,00,0,116,-102..492,-21,00,0,117,-94.4479,--21,0,,0,118,-87.6666,-1172.2,,0,0,1119,-83.6687,-1172.2,,0,0,1120,0,-1779.2,00,0,121,0,-1779.2,00,0,122,0,-1179.2,,0,0,1123,0,-1179.2,,0,0,1124,0,-1179.2,,0,0,1125,0,-1179.2,,0,0,1126,0,-1179.2,,0,0,1127,0,-1179.2,,0,0,1128,0,-1179.2,,0,0,1129,0,-1179.2,,0,0,1130,83.6887,-1772.2,00,0,131,87.6666,-1772.2,00,0,132,94.4779,-221,0,00,133,102.4492,--21,0,,0,134,111.7752,--21,0,,0,135,122.2202,--21,0,,0,136,134.1142,--21,0,,0,137,146.3352,--21,0,,0,138,158.5552,--21,0,,0,139,174.5572,--21,0,,0,140,184.3352,--21,0,,0,141,195.5542,-221,0,00,142,202.8882,688.82,00,0,143,206.6642,611.82,00,0,144,208.5532,611.82,00,0,145,0,61..82,0,,0,146,0,688.82,00,0,147,0,688.82,00,0,148,0,688.82,00,0,149,0,-115,0,00,150,0,-115,0,00,151,0,-115,0,00,152,0,-115,0,00,153,0,-115,0,00,154,0,-115,0,00,155,0,-115,0,00,13.3內(nèi)力計(jì)算算結(jié)果(15).TOOTALIINTERFORCEEELEMMENTELEMENNTNO..NOODE1-NNNODEE1-QNODE11-MNODDE2-NNODE22-QNODDE2-M1-00.454995E+0330.335069EE+02--0.114464E+002-0..429166E+03-0.122376E++03-00.164222E+03322-0.277538E++03-00.343116E+0330.116422EE+03--0.264471E+0030..165411E+030.555106E++0133-0.233928E++03-00.179334E+033-0.555113EE+01--0.230030E+0030..561044E+020.822076E++0244-0.211019E++03-00.828334E+022-0.882076EE+02--0.206666E+0030..212766E+010.100886E++0355-0.200325E++03-00.311999E+022-0.110886EE+03--0.197741E+003-0..359799E+020.100651E++0366-0.211115E++0300.851118E+011-0.110651EE+03--0.193309E+003-0..868288E+020.744488E++0277-0.222861E++0300.465669E+022-0.774488EE+02--0.202267E+003-0..153511E+030.144742E++0288-0.299025E++0300.348990E+011-0.114742EE+02--0.224426E+003-0..153555E+03-0.311668E++0299-0.300936E++03-00.806006E+0220.331668EE+02--0.274412E+003-0..118733E+03-0.411486E++02100-0.322513E++03-00.942225E+0220.441486EE+02--0.300035E+003-0..135588E+03-0.522964E++02111-0.322977E++03-00.924778E+0220.552965EE+02--0.322282E+003-0..115922E+03-0.588806E++02122-0.333151E++03-00.649771E+0220.558806EE+02--0.329985E+003-0..137911E+03-0.788019E++02133-0.322617E++03-00.663221E+0220.778019EE+02--0.335516E+003-0..121799E+03-0.933403E++02144-0.300988E++03-00.641660E+0220.993403EE+02--0.326679E+003-0..814699E+02-0.988637E++02155-0.288885E++03-00.663113E+0220.998636EE+02--0.308802E+003-0..144266E+02-0.866888E++02166-0.266397E++03-00.884440E+0220.886889EE+02--0.285561E+0030..590000E+02-0.488748E++02177-0.244633E++03-00.131662E+0330.448748EE+02--0.264402E+0030..107600E+030.100908E++02188-0.233690E++03-00.158663E+033-0.110908EE+02--0.217720E+0030..657877E+020.777616E++02199-0.199621E++03-00.114006E+033-0.777616EE+02--0.184478E+0030..112999E+020.111594E++03200-0.177629E++03-00.565000E+022-0.111594EE+03--0.180025E+003-0..705277E+020.111097E++03211-0.199249E++0300.202667E+022-0.111097EE+03--0.224451E+003-0..124077E+030.655183E++02222-0.244721E++0300.684996E+022-0.665183EE+02--0.293355E+003-0..146911E+030.155910E++01233-0.311950E++0300.753008E+022-0.115907EE+01--0.371156E+003-0..129411E+03-0.577936E++02244-0.333744E++0300.202336E+0330.557936EE+02--0.385513E+003-0..278233E+03-0.199988E++03255-0.388355E++03-00.284335E+0330.220405EE+03--0.335548E+0030..205722E+03-0.566345E++02266-0.377197E++03-00.128443E+0330.556345EE+02--0.319990E+0030..743377E+020.266165E++01277-0.299416E++03-00.146006E+033-0.226167EE+01--0.247782E+0030..676411E+020.655704E++02288-0.222531E++03-00.123338E+033-0.665704EE+02--0.193329E+0030..195800E+020.111105E++03299-0.188121E++03-00.700779E+022-0.111105EE+03--0.177725E+003-0..569488E+020.111571E++03300-0.188582E++0300.114999E+022-0.111571EE+03--0.197724E+003-0..114266E+030.777261E++02311-0.211826E++0300.657446E+022-0.777261EE+02--0.237796E+003-0..158599E+030.100578E++02322-0.266504E++0300.107335E+033-0.110578EE+02--0.247735E+003-0..131377E+03-0.488952E++02333-0.288656E++0300.585444E+0220.448952EE+02--0.264492E+003-0..882766E+02-0.866924E++02344-0.300893E++03-00.147551E+0220.886924EE+02--0.289976E+003-0..662144E+02-0.988569E++02355-0.322765E++03-00.817552E+0220.998568EE+02--0.310074E+003-0..640733E+02-0.933233E++02366-0.333599E++03-00.122004E+0330.993233EE+02--0.327700E+003-0..662344E+02-0.777754E++02377-0.333066E++03-00.138113E+0330.777754EE+02--0.332232E+003-0..648955E+02-0.588456E++02388-0.322362E++03-00.116004E+0330.558456EE+02--0.330057E+003-0..926055E+02-0.522610E++02399-0.300115E++03-00.135556E+0330.552609EE+02--0.325593E+003-0..946144E+02-0.411241E++02400-0.277496E++03-00.118443E+0330.441242EE+02--0.310020E+003-0..814388E+02-0.311738E++02411-0.222537E++03-00.153116E+0330.331738EE+02--0.291137E+0030..266844E+010.144316E++02422-0.200403E++03-00.153228E+033-0.114316EE+02--0.229997E+0030..461855E+020.733885E++02433-0.199450E++03-00.866665E+022-0.773885EE+02--0.212255E+0030..819733E+010.100575E++03444-0.199885E++03-00.358446E+022-0.110575EE+03--0.204470E+003-0..313500E+020.100799E++03455