4.易于(yu)實(shi)現較大(da)(da)的(de)變徑(jing)要(yao)求。長(chang)螺旋跟管(guan)(guan)(guan)(guan)(guan)(guan)鉆(zhan)(zhan)(zhan)(zhan)進(jin)(jin)(jin)(jin)管(guan)(guan)(guan)(guan)(guan)(guan)棚(peng)鉆(zhan)(zhan)(zhan)(zhan)孔(kong)(kong)(kong)軌跡控(kong)制方法管(guan)(guan)(guan)(guan)(guan)(guan)棚(peng)鋼管(guan)(guan)(guan)(guan)(guan)(guan)鉆(zhan)(zhan)(zhan)(zhan)孔(kong)(kong)(kong)一旦出(chu)現孔(kong)(kong)(kong)斜(xie)或(huo)超出(chu)設(she)(she)(she)計(ji)(ji)允(yun)許偏(pian)差，會(hui)妨礙鄰近(jin)鋼管(guan)(guan)(guan)(guan)(guan)(guan)的(de)鉆(zhan)(zhan)(zhan)(zhan)設(she)(she)(she)，造(zao)成(cheng)洞體(ti)形狀參(can)差不(bu)齊(qi)，支護(hu)效果(guo)不(bu)好等(deng)(deng)(deng)(deng)結(jie)果(guo)；若鋼管(guan)(guan)(guan)(guan)(guan)(guan)下沉到一定(ding)(ding)程(cheng)度(du)，開挖時(shi)還需要(yao)切(qie)(qie)除(chu)，造(zao)成(cheng)間隔(ge)(ge)增大(da)(da)，易坍塌(ta)。為此，鉆(zhan)(zhan)(zhan)(zhan)進(jin)(jin)(jin)(jin)時(shi)可采取中(zhong)(zhong)壓給(gei)進(jin)(jin)(jin)(jin)、中(zhong)(zhong)等(deng)(deng)(deng)(deng)轉速、中(zhong)(zhong)等(deng)(deng)(deng)(deng)循(xun)(xun)環液(ye)(ye)量鉆(zhan)(zhan)(zhan)(zhan)進(jin)(jin)(jin)(jin)；鉆(zhan)(zhan)(zhan)(zhan)孔(kong)(kong)(kong)平(ping)面(mian)誤差徑(jing)向應控(kong)制在20cm內，角度(du)誤差小于(yu)1°以免(mian)因(yin)(yin)孔(kong)(kong)(kong)徑(jing)過(guo)大(da)(da)而造(zao)成(cheng)管(guan)(guan)(guan)(guan)(guan)(guan)棚(peng)鋼管(guan)(guan)(guan)(guan)(guan)(guan)偏(pian)斜(xie)和向下彎(wan)(wan)曲(qu)。在實(shi)際施(shi)工(gong)中(zhong)(zhong)水(shui)平(ping)鉆(zhan)(zhan)(zhan)(zhan)孔(kong)(kong)(kong)彎(wan)(wan)曲(qu)一般較難避(bi)免(mian)，因(yin)(yin)此除(chu)提高(gao)管(guan)(guan)(guan)(guan)(guan)(guan)棚(peng)定(ding)(ding)位精度(du)外，可再給(gei)以適(shi)當的(de)上抬(tai)量(根據現場(chang)(chang)地質(zhi)(zhi)情(qing)況(kuang)定(ding)(ding))，以補償(chang)部(bu)(bu)分(fen)鉆(zhan)(zhan)(zhan)(zhan)孔(kong)(kong)(kong)下垂(chui)(chui)量。管(guan)(guan)(guan)(guan)(guan)(guan)棚(peng)鉆(zhan)(zhan)(zhan)(zhan)孔(kong)(kong)(kong)軌跡控(kong)制方法管(guan)(guan)(guan)(guan)(guan)(guan)棚(peng)鋼管(guan)(guan)(guan)(guan)(guan)(guan)鉆(zhan)(zhan)(zhan)(zhan)孔(kong)(kong)(kong)一旦出(chu)現孔(kong)(kong)(kong)斜(xie)或(huo)超出(chu)設(she)(she)(she)計(ji)(ji)允(yun)許偏(pian)差，會(hui)妨礙鄰近(jin)鋼管(guan)(guan)(guan)(guan)(guan)(guan)的(de)鉆(zhan)(zhan)(zhan)(zhan)設(she)(she)(she)，造(zao)成(cheng)洞體(ti)形狀參(can)差不(bu)齊(qi)，支護(hu)效果(guo)不(bu)好等(deng)(deng)(deng)(deng)結(jie)果(guo)；若鋼管(guan)(guan)(guan)(guan)(guan)(guan)下沉到一定(ding)(ding)程(cheng)度(du)，開挖時(shi)還需要(yao)切(qie)(qie)除(chu)，造(zao)成(cheng)間隔(ge)(ge)增大(da)(da)，易坍塌(ta)。為此，鉆(zhan)(zhan)(zhan)(zhan)進(jin)(jin)(jin)(jin)時(shi)可采取中(zhong)(zhong)壓給(gei)進(jin)(jin)(jin)(jin)、中(zhong)(zhong)等(deng)(deng)(deng)(deng)轉速、中(zhong)(zhong)等(deng)(deng)(deng)(deng)循(xun)(xun)環液(ye)(ye)量鉆(zhan)(zhan)(zhan)(zhan)進(jin)(jin)(jin)(jin)；鉆(zhan)(zhan)(zhan)(zhan)孔(kong)(kong)(kong)平(ping)面(mian)誤差徑(jing)向應控(kong)制在20cm內，角度(du)誤差小于(yu)1°以免(mian)因(yin)(yin)孔(kong)(kong)(kong)徑(jing)過(guo)大(da)(da)而造(zao)成(cheng)管(guan)(guan)(guan)(guan)(guan)(guan)棚(peng)鋼管(guan)(guan)(guan)(guan)(guan)(guan)偏(pian)斜(xie)和向下彎(wan)(wan)曲(qu)。在實(shi)際施(shi)工(gong)中(zhong)(zhong)水(shui)平(ping)鉆(zhan)(zhan)(zhan)(zhan)孔(kong)(kong)(kong)彎(wan)(wan)曲(qu)一般較難避(bi)免(mian)，因(yin)(yin)此除(chu)提高(gao)管(guan)(guan)(guan)(guan)(guan)(guan)棚(peng)定(ding)(ding)位精度(du)外，可再給(gei)以適(shi)當的(de)上抬(tai)量(根據現場(chang)(chang)地質(zhi)(zhi)情(qing)況(kuang)定(ding)(ding))，以補償(chang)部(bu)(bu)分(fen)鉆(zhan)(zhan)(zhan)(zhan)孔(kong)(kong)(kong)下垂(chui)(chui)量。注漿(jiang)時(shi)，排氣孔(kong)(kong)(kong)出(chu)漿(jiang)后應立(li)即停(ting)止注漿(jiang)。南寧隧道(dao)管(guan)(guan)(guan)(guan)(guan)(guan)棚(peng)支護(hu)

加固效應：注漿漿液(ye)經管壁(bi)孔壓入圍(wei)巖裂(lie)隙(xi)中，使松散巖體膠(jiao)結(jie)、固結(jie)，從而改善了軟弱圍(wei)巖的物理力學(xue)性質，增強(qiang)了圍(wei)巖的自(zi)承(cheng)能力，達到加固鋼管周邊軟弱圍(wei)巖的目的。

環(huan)槽效(xiao)應：掌子面爆破(po)產生的(de)沖擊波傳播和爆生氣體擴展遇管棚密(mi)集環(huan)形孔槽后被(bei)反射(she)(she)、吸收或(huo)繞射(she)(she)，降(jiang)低(di)了反向拉(la)伸(shen)波所造成的(de)圍(wei)(wei)巖破(po)壞程度及擾動范圍(wei)(wei)。

確保(bao)施工(gong)(gong)安(an)全：管(guan)棚(peng)(peng)支(zhi)(zhi)(zhi)護(hu)(hu)剛度(du)較大(da)(da)，施工(gong)(gong)時(shi)(shi)如(ru)發生(sheng)塌方(fang)，塌碴(cha)(cha)也(ye)是落在(zai)管(guan)棚(peng)(peng)上(shang)(shang)(shang)部巖碴(cha)(cha)上(shang)(shang)(shang)，起到(dao)(dao)緩沖作用(yong)，即使管(guan)棚(peng)(peng)失穩，其破壞(huai)也(ye)較緩慢。管(guan)棚(peng)(peng)支(zhi)(zhi)(zhi)護(hu)(hu)適用(yong)范(fan)圍根(gen)據國內外的(de)(de)(de)(de)施工(gong)(gong)實(shi)踐，綜(zong)合我(wo)國目(mu)前地(di)(di)(di)(di)下(xia)工(gong)(gong)程管(guan)棚(peng)(peng)支(zhi)(zhi)(zhi)護(hu)(hu)應用(yong)的(de)(de)(de)(de)實(shi)際案例，管(guan)棚(peng)(peng)支(zhi)(zhi)(zhi)護(hu)(hu)可(ke)適用(yong)于(yu)：軟弱砂土(tu)質地(di)(di)(di)(di)層(ceng)、砂卵礫石(shi)地(di)(di)(di)(di)層(ceng)，膨脹性軟流塑、硬(ying)可(ke)塑狀粉質粘土(tu)地(di)(di)(di)(di)層(ceng)，裂隙發育巖體、突(tu)泥突(tu)水段(duan)(duan)、斷(duan)層(ceng)破碎(sui)帶、塌方(fang)段(duan)(duan)、破碎(sui)土(tu)巖堆地(di)(di)(di)(di)段(duan)(duan)、淺埋(mai)(mai)大(da)(da)偏壓等地(di)(di)(di)(di)質和(he)地(di)(di)(di)(di)下(xia)水豐富條(tiao)件(jian)的(de)(de)(de)(de)地(di)(di)(di)(di)下(xia)構筑(zhu)物施工(gong)(gong)的(de)(de)(de)(de)支(zhi)(zhi)(zhi)護(hu)(hu)，隧道進(jin)出口段(duan)(duan)開(kai)挖(wa)的(de)(de)(de)(de)支(zhi)(zhi)(zhi)護(hu)(hu)，也(ye)多應用(yong)于(yu)地(di)(di)(di)(di)鐵(tie)等穿越城區的(de)(de)(de)(de)地(di)(di)(di)(di)下(xia)工(gong)(gong)程的(de)(de)(de)(de)開(kai)挖(wa)預支(zhi)(zhi)(zhi)護(hu)(hu)，可(ke)作為(wei)穿越既有建筑(zhu)物、公(gong)路、鐵(tie)路及(ji)地(di)(di)(di)(di)下(xia)結(jie)構物下(xia)方(fang)修建隧道的(de)(de)(de)(de)輔助(zhu)方(fang)法；作為(wei)隧道洞(dong)口段(duan)(duan)及(ji)修建大(da)(da)斷(duan)面(mian)隧道施工(gong)(gong)的(de)(de)(de)(de)輔助(zhu)工(gong)(gong)法及(ji)作為(wei)其他施工(gong)(gong)的(de)(de)(de)(de)輔助(zhu)工(gong)(gong)法，也(ye)常用(yong)于(yu)淺埋(mai)(mai)但不宜(yi)明挖(wa)地(di)(di)(di)(di)段(duan)(duan)或淺埋(mai)(mai)隧道情況下(xia)。寧(ning)夏隧洞(dong)管(guan)棚(peng)(peng)管(guan)管(guan)棚(peng)(peng)支(zhi)(zhi)(zhi)護(hu)(hu)剛度(du)較大(da)(da)，施工(gong)(gong)時(shi)(shi)如(ru)再次發生(sheng)塌方(fang)，塌渣也(ye)是落在(zai)管(guan)棚(peng)(peng)上(shang)(shang)(shang)部巖渣上(shang)(shang)(shang)，起到(dao)(dao)緩沖作用(yong)。

管棚施(shi)工(gong)中如何配制(zhi)漿液(ye)？

（1）水(shui)泥(ni)(ni)漿(jiang)的攪(jiao)拌(ban)應在高速攪(jiao)拌(ban)機內進(jin)(jin)行，嚴格按(an)照施工配合比進(jin)(jin)行投料，在管棚(peng)管中注(zhu)(zhu)水(shui)泥(ni)(ni)水(shui)玻璃(li)漿(jiang)液，其配比為水(shui)泥(ni)(ni):水(shui)玻璃(li)=1:1，水(shui)泥(ni)(ni)漿(jiang)水(shui)灰(hui)比1:1，水(shui)玻璃(li)模數m=2.4，濃度Be=35，注(zhu)(zhu)漿(jiang)時初壓0.5～1MPa，終壓2.0Mpa，注(zhu)(zhu)漿(jiang)結(jie)束后(hou)用1:1水(shui)泥(ni)(ni)砂(sha)漿(jiang)充填無縫管棚(peng)管，以增強管棚(peng)管強度和剛度。

（2）攪(jiao)(jiao)拌(ban)水(shui)泥(ni)(ni)漿的(de)投料順序：在(zai)放水(shui)的(de)同時，將(jiang)緩(huan)凝劑、外摻劑在(zai)水(shui)中按一定比例加入，攪(jiao)(jiao)拌(ban)溶(rong)解，再將(jiang)需要的(de)水(shui)泥(ni)(ni)倒入，攪(jiao)(jiao)拌(ban)2～3min。

（3）外摻(chan)劑的重(zhong)量為水泥(ni)重(zhong)量的5%-10%，緩凝劑的摻(chan)量占水泥(ni)重(zhong)量的2%～3%。

（4）制(zhi)備水泥漿或稀釋水玻璃(li)時，嚴禁水泥塊或紙片進(jin)入漿液，放漿進(jin)入儲漿桶時要用濾網過濾，以防止堵(du)塞注漿泵。

（5）做(zuo)好配置漿液(ye)的施工記錄，并(bing)且在(zai)注漿過程中要做(zuo)好注漿記錄，為分析(xi)注漿效果提供依據。

（6）配置好(hao)的(de)漿液存(cun)放在由(you)低速攪拌器的(de)儲漿罐內，防(fang)止(zhi)漿液由(you)于存(cun)放時(shi)間稍長產(chan)生沉(chen)淀、離析等現象。

管棚管施工要求：

（1）為保(bao)證成孔(kong)質量，防止鄰(lin)孔(kong)鉆(zhan)(zhan)進(jin)時前面的(de)成孔(kong)坍塌(ta)，鉆(zhan)(zhan)孔(kong)間隔(ge)進(jin)行。先(xian)鉆(zhan)(zhan)奇數(shu)孔(kong)，后(hou)鉆(zhan)(zhan)偶數(shu)孔(kong)，成孔(kong)直(zhi)徑(jing)為φ140mm，以便(bian)順利安裝φ108×6mm鋼花管。即采用(yong)大引導孔(kong)施工，很大程度上克服在頂管施工作業中送管難的(de)情況發(fa)生。

（2）施(shi)作長(chang)(chang)管(guan)棚(peng)時（φ108×6mm），打(da)孔角度洞口(kou)段為1°～3°，環向間距40cm，每根長(chang)(chang)40m（每節長(chang)(chang)9m，采用長(chang)(chang)89cm套(tao)管(guan)連接(jie)），施(shi)作時每段應交錯搭接(jie)3m，管(guan)棚(peng)管(guan)上按間距15cm梅花形(xing)鉆(zhan)10mm的(de)小孔。1節管(guan)棚(peng)管(guan)頂端做成錐型，以便頂進。φ108×6mm管(guan)棚(peng)管(guan)采用4.0m和6.0m兩種規格，奇數孔首(shou)根4.0m，偶數孔首(shou)根6.0m，其余的(de)均(jun)為6.0m，以避免管(guan)棚(peng)管(guan)接(jie)頭在同一斷面上。管(guan)棚(peng)管(guan)采用套(tao)管(guan)聯(lian)接(jie)。

（3）為了確保鉆(zhan)(zhan)(zhan)桿(gan)接頭(tou)有足夠的強度、剛度和韌性，鉆(zhan)(zhan)(zhan)桿(gan)連接套(tao)應與鉆(zhan)(zhan)(zhan)桿(gan)材質(zhi)一致(zhi)，兩端加工(gong)內螺(luo)紋（配合鉆(zhan)(zhan)(zhan)桿(gan)端外螺(luo)扣），連接套(tao)的壁厚≥10mm。為防止鉆(zhan)(zhan)(zhan)桿(gan)在(zai)推力(li)(li)和振動(dong)力(li)(li)的雙重作用(yong)下(xia)(xia)，上下(xia)(xia)顫動(dong)，導致(zhi)鉆(zhan)(zhan)(zhan)孔不直，鉆(zhan)(zhan)(zhan)孔時，應把扶直器(qi)套(tao)在(zai)鉆(zhan)(zhan)(zhan)桿(gan)上，隨鉆(zhan)(zhan)(zhan)桿(gan)向(xiang)前鉆(zhan)(zhan)(zhan)進向(xiang)前平移。云南跟管(guan)、管(guan)棚、鋼(gang)花管(guan)，合縱(zong)達鋼(gang)結構，實力(li)(li)廠家。

注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)過(guo)程(cheng)控(kong)制(zhi)注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)過(guo)程(cheng)中(zhong)(zhong)隨時檢查孔口、鄰孔、覆蓋層較薄部位有無串漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)現象，如發生串漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)，應(ying)立即停止(zhi)注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)或采用間歇式注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)封堵(du)串漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)口，也可(ke)以采用麻紗(sha)、木楔(xie)、快硬水(shui)泥(ni)砂漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)或錨(mao)固劑(ji)封堵(du)，直至不(bu)再(zai)串漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)時再(zai)繼續注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)。注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)時相鄰孔眼需間隔開，不(bu)能連續注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)，以確保固結效果(guo)(guo)，同時達(da)到控(kong)制(zhi)注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)量的(de)目的(de)。注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)時，需要根據(ju)注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)終壓和注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)量雙控(kong)注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)質(zhi)量；要經常(chang)(chang)檢查注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)壓力(li)(li)(li)表(biao)的(de)準確度；要根據(ju)單根鋼管(guan)(guan)(guan)(guan)注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)量并(bing)結合巖體(ti)的(de)松散程(cheng)度，綜合考慮注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)量。注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)效果(guo)(guo)觀察(cha)、分(fen)析(xi)采取抽(chou)芯等措施進行注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)效果(guo)(guo)檢查，如注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)效果(guo)(guo)不(bu)好(hao)，應(ying)分(fen)析(xi)其原因。如未設置止(zhi)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)墻，可(ke)能導(dao)致漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)液外流(liu)，由于(yu)注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)壓力(li)(li)(li)不(bu)夠或注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)量沒有達(da)到計(ji)算值造成注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)效果(guo)(guo)差(cha)。3注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)壓力(li)(li)(li)表(biao)顯示(shi)不(bu)正常(chang)(chang)原因分(fen)析(xi)管(guan)(guan)(guan)(guan)棚管(guan)(guan)(guan)(guan)注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)過(guo)程(cheng)中(zhong)(zhong)，評價注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)效果(guo)(guo)、判斷注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)是(shi)否完成，注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)壓力(li)(li)(li)表(biao)的(de)顯示(shi)是(shi)非常(chang)(chang)重要的(de)。在(zai)管(guan)(guan)(guan)(guan)棚管(guan)(guan)(guan)(guan)注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)過(guo)程(cheng)中(zhong)(zhong)，由于(yu)各種(zhong)(zhong)原因注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)壓力(li)(li)(li)表(biao)可(ke)能在(zai)注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)過(guo)程(cheng)中(zhong)(zhong)，會出現各種(zhong)(zhong)各樣的(de)變化情況，針(zhen)對每種(zhong)(zhong)情況，具體(ti)分(fen)析(xi)其原因有利(li)于(yu)及時和有效的(de)解(jie)決注(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)(zhu)漿(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)(jiang)過(guo)程(cheng)中(zhong)(zhong)遇到的(de)問題。玉(yu)林跟管(guan)(guan)(guan)(guan)、管(guan)(guan)(guan)(guan)棚、鋼花管(guan)(guan)(guan)(guan)，合縱達(da)鋼結構，實力(li)(li)(li)廠家。欽(qin)州(zhou)大管(guan)(guan)(guan)(guan)棚管(guan)(guan)(guan)(guan)

超前錨(mao)桿和(he)小管(guan)注漿具有施工方便、技術易(yi)掌握、機械化配套程度要求低(di)等優點。南寧隧道管(guan)棚支護

管棚管施工(gong)(gong)的(de)時(shi)候如何設(she)計參(can)(can)數(shu)及漿液(ye)量(liang)？管棚管施工(gong)(gong)時(shi)，應嚴格參(can)(can)照設(she)計要求(qiu)備料、施工(gong)(gong)，以保證注漿的(de)質量(liang)。設(she)計參(can)(can)數(shu)為：

1、管(guan)(guan)(guan)棚管(guan)(guan)(guan)采用Φ108mm，壁厚6mm的熱軋無縫鋼(gang)管(guan)(guan)(guan)，長度為(wei)20m，堆積體(ti)范(fan)圍(wei)內(nei)共3環(huan)管(guan)(guan)(guan)棚管(guan)(guan)(guan)，布置在拱頂180°范(fan)圍(wei)內(nei)，管(guan)(guan)(guan)棚環(huan)向間(jian)距為(wei)30cm，距開挖輪廓(kuo)線30cm，外插角3~5°。鋼(gang)管(guan)(guan)(guan)上鉆注漿孔(kong)，孔(kong)徑(jing)10mm，孔(kong)間(jian)距50cm，梅花形布置，尾部(bu)2m范(fan)圍(wei)內(nei)不鉆孔(kong)作(zuo)為(wei)止漿段。

2、傾角：平行與路線(xian)(xian)縱坡(po)，方向：平行與路線(xian)(xian)中線(xian)(xian)。

3、鋼管施(shi)工誤差：徑向不大于(yu)20cm。

4、隧道縱向(xiang)同(tong)一橫(heng)斷面內的(de)接(jie)(jie)頭數不(bu)大于(yu)50%，相鄰鋼管的(de)接(jie)(jie)頭至少錯開1m。南寧(ning)隧道管棚支護(hu)

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