【正文】 筋焊接。 綜合接地鋼筋布設(shè)位置細(xì)寧溝隧道接地鋼筋分布里程表接地鋼筋里程圍巖級別接地鋼筋里程圍巖級別接地鋼筋里程圍巖級別DK509+111明洞DK509+807ⅣbDK510+503　DK509+123DK509+819DK510+515DK509+135DK509+831VcDK510+527DK509+147VcDK509+843DK510+539DK509+159DK509+855DK510+551DK509+171DK509+867DK510+563DK509+183DK509+879DK510+575DK509+195DK509+891DK510+587DK509+207DK509+903DK510+599DK509+219DK509+915DK510+611DK509+231DK509+927DK510+623DK509+243IVbDK509+939IVbDK510+635DK509+255DK509+951DK510+647DK509+267DK509+963DK510+659DK509+279DK509+975DK510+671DK509+291DK509+987ⅢbDK510+683DK509+303DK509+999DK510+695DK509+315DK510+011DK510+707DK509+327DK510+023DK510+719DK509+339DK510+035DK510+731DK509+351VcDK510+047DK510+743DK509+363DK510+059DK510+755DK509+375DK510+071DK510+767DK509+387DK510+083DK510+779DK509+399DK510+095DK510+791DK509+411明洞DK510+107DK510+803DK509+423ⅤcDK510+119DK510+815DK509+435DK510+131DK510+827DK509+447DK510+143DK510+839DK509+459DK510+155DK510+851DK509+471DK510+167DK510+863DK509+483DK510+179DK510+875DK509+495DK510+191DK510+887DK509+507DK510+203DK510+899DK509+519DK510+215DK510+911DK509+531DK510+227DK510+923DK509+543IVbDK510+239DK510+935DK509+555DK510+251DK510+947DK509+567DK510+263DK510+959IVbDK509+579DK510+275DK510+971DK509+591DK510+287DK510+983DK509+603DK510+299DK510+995DK509+615DK510+311DK511+007DK509+627DK510+323DK511+019DK509+639DK510+335DK511+031DK509+651DK510+347DK511+043DK509+663DK510+359DK511+055DK509+675DK510+371ⅣbDK511+067DK509+687DK510+383DK511+079DK509+699DK510+395DK511+091DK509+711DK510+407DK511+103DK509+723DK510+419DK511+115VcDK509+735DK510+431ⅢbDK511+127DK509+747DK510+443DK511+139DK509+759DK510+455DK511+151DK509+771DK510+467DK511+163DK509+783DK510+479　　DK509+795DK510+491　　接觸網(wǎng)預(yù)埋槽道施工隧道接觸網(wǎng)懸掛安裝采用錨桿槽道形式預(yù)留，懸掛安裝基礎(chǔ)一般采用錨桿槽道形式進行預(yù)埋。明洞地段，利用隧道仰拱襯砌下層的結(jié)構(gòu)鋼筋做為接地極，并從兩側(cè)引出。接地鋼筋截面應(yīng)滿足接觸網(wǎng)最大短路電流要求。（4）二次襯砌中無結(jié)構(gòu)鋼筋的隧道，除接觸網(wǎng)基礎(chǔ)接地外，不再單獨考慮接地鋼筋設(shè)置。以1m為間隔，選擇縱向結(jié)構(gòu)鋼筋作為接地鋼筋，在每個臺車位（作業(yè)段）中部選一根環(huán)向結(jié)構(gòu)鋼筋作為環(huán)向接地鋼筋，環(huán)、縱向接地鋼筋間可靠焊接；縱向接地鋼筋在作業(yè)段間可不連接。二次襯砌中有結(jié)構(gòu)鋼筋的隧道接地設(shè)置：（1）利用二次襯砌的內(nèi)層縱、環(huán)向結(jié)構(gòu)鋼筋作為接觸網(wǎng)斷線保護接地鋼筋。（6）所有接地鋼筋間的聯(lián)接均應(yīng)保證焊接質(zhì)量，焊接要求詳見焊接示意圖。兼有接地功能（含連接）的結(jié)構(gòu)鋼筋和專用接地鋼筋截面應(yīng)滿足接觸網(wǎng)最大短路電流要求。（4）每個臺車位的隧道接地極均通過連接鋼筋與兩側(cè)電纜槽外緣的縱向接地鋼筋連接。（2）III級圍巖隧道，利用錨桿和專用環(huán)向接地鋼筋做為接地極。各過軌管線管口均要求打磨光滑以保護電纜，管線連接處焊接質(zhì)量、彎管半徑要滿足設(shè)計要求，并在電纜槽底露頭1cm，兩端用麻油布、土工布封堵或者冷封膠封堵，以防滲水。①電力專業(yè)：在洞口附近設(shè)置一組過軌管，為4根Φ150mm的鋼管，過軌管引入兩側(cè)電力電纜槽、與電力電纜槽交角成45度，過軌管線均設(shè)置于中心水溝下方，鋼管的彎曲半徑均不小于1m，過軌管采用材質(zhì)、規(guī)格應(yīng)滿足于相關(guān)站前主體工程同設(shè)計壽命的要求，在壽命期不腐、不碎。接地鋼筋間的聯(lián)接均應(yīng)保證焊接質(zhì)量。洞室接地端子采用橋隧型接地端子，在每個洞室兩側(cè)壁下部設(shè)置接地端子，供洞室內(nèi)設(shè)備、設(shè)施接地。(3)無線通信專業(yè)：在綜合洞室附近設(shè)置一組過軌管，為2根Φ100mm過軌管，過軌管引入通信信號電纜槽，過軌管采用材質(zhì)、規(guī)格應(yīng)滿足于相關(guān)站前主體工程同設(shè)計壽命的要求，在壽命期不腐、不碎。(1)電力專業(yè)：在綜合洞室附近設(shè)置一組過軌管，為4根Φ150mm的鋼管，過軌管引入兩側(cè)電力電纜槽（水溝電纜槽靠隧道邊墻側(cè)）、與電力電纜槽交角成45度，過軌管線均設(shè)置于中心水溝下方，鋼管的彎曲半徑均不小于1m，過軌管采用材質(zhì)、規(guī)格應(yīng)滿足于相關(guān)站前主體工程同設(shè)計壽命的要求，在壽命期不腐、不碎。 四電接口項目主要工程量根據(jù)四電接口主要項目劃分結(jié)合西嶺隧道設(shè)計圖紙進行統(tǒng)計計算，本隧道接觸網(wǎng)預(yù)埋槽道、綜合接地鋼筋、綜合洞室接地端子及過軌管、進出口過軌管、水溝電纜槽接地端子等詳細(xì)布置見附件西嶺隧道四電接口施工平面圖和工程數(shù)量表：項目內(nèi)容主要項目技術(shù)要求及說明預(yù)埋槽道型號規(guī)格每組數(shù)量（根）槽道組間距（mm）相對隧道中線位置數(shù)量（組）合計長度（m）總計長度（m）Ⅳa、Ⅲ級圍巖地段預(yù)埋數(shù)量及加強措施數(shù)量（組）加強措施A2400拱頂中心116580126462鋼筋網(wǎng)片加強（隧參07）C32224（下）2400（上）邊墻2821012結(jié)構(gòu)鋼筋加強（隧參01）2600拱腰2814012D2600拱腰12366結(jié)構(gòu)鋼筋加強（隧參01）G2600拱頂中心315/鋼筋網(wǎng)片加強（隧參07）E2600拱腰840/結(jié)構(gòu)鋼筋加強（隧參01）F2400拱頂偏177。接地端子在兩側(cè)通信信號電纜槽側(cè)壁和溝底設(shè)置。6通信信號、電力電纜槽Φ16縱向接地鋼筋每一100m斷開一次。接地端子在綜合洞室兩側(cè)預(yù)留接地端子和接地鋼筋。3明洞仰拱綜合接地（提