由于(yu)钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)不(bu)变径(jing)(jing)跟(gen)(gen)管(guan)(guan)(guan)(guan)钻(zuan)(zuan)(zuan)(zuan)(zuan)具(ju)的(de)钻(zuan)(zuan)(zuan)(zuan)(zuan)进(jin)(jin)是同(tong)口径(jing)(jing)进(jin)(jin)入，尤其是遇(yu)到(dao)漂(piao)石(shi)时，钻(zuan)(zuan)(zuan)(zuan)(zuan)进(jin)(jin)将非(fei)常困难，即(ji)使钻(zuan)(zuan)(zuan)(zuan)(zuan)孔(kong)成(cheng)功，由于(yu)钻(zuan)(zuan)(zuan)(zuan)(zuan)孔(kong)缩径(jing)(jing)，起拔套管(guan)(guan)(guan)(guan)也非(fei)常麻烦(fan)，甚至经常造(zao)成(cheng)套管(guan)(guan)(guan)(guan)断(duan)(duan)裂等孔(kong)内(nei)事故。吉林大(da)(da)学郑治川(chuan)成(cheng)果(guo)钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)活(huo)瓣张开钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)活(huo)瓣闭合(he)单偏心(xin)(xin)跟(gen)(gen)管(guan)(guan)(guan)(guan)钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)—Ⅰ型(xing)(xing)(xing)张开状态单偏心(xin)(xin)跟(gen)(gen)管(guan)(guan)(guan)(guan)钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)—Ⅱ型(xing)(xing)(xing)该型(xing)(xing)(xing)钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)优点：1、连接偏心(xin)(xin)钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)和钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)体(ti)(ti)的(de)横(heng)销只起到(dao)悬挂(gua)钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)的(de)作，不(bu)承担扭(niu)矩，避(bi)免了销子(zi)的(de)变形、折断(duan)(duan)所造(zao)成(cheng)孔(kong)内(nei)事故；2、目前(qian)国(guo)内(nei)采(cai)用(yong)的(de)偏心(xin)(xin)跟(gen)(gen)管(guan)(guan)(guan)(guan)钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)需要(yao)(yao)转(zhuan)动175°左(zuo)(zuo)右才(cai)能(neng)实现(xian)(xian)钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)的(de)张敛，而这(zhei)种类型(xing)(xing)(xing)钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)的(de)钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)体(ti)(ti)正转(zhuan)一(yi)个很(hen)小(xiao)角度(du)(du)（8°左(zuo)(zuo)右）即(ji)可使钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)直径(jing)(jing)增(zeng)大(da)(da)到(dao)设(she)定(ding)的(de)扩(kuo)孔(kong)直径(jing)(jing)，钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)收回(hui)(hui)时，反转(zhuan)一(yi)个很(hen)小(xiao)角度(du)(du)即(ji)可使钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)直径(jing)(jing)缩小(xiao)到(dao)设(she)定(ding)的(de)直径(jing)(jing)，减少(shao)了钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)收回(hui)(hui)时被卡住的(de)概(gai)率；3、单偏心(xin)(xin)跟(gen)(gen)管(guan)(guan)(guan)(guan)钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)—Ⅱ型(xing)(xing)(xing)的(de)扭(niu)矩是通过在(zai)钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)体(ti)(ti)上设(she)有(you)(you)一(yi)肾形的(de)长圆孔(kong)和在(zai)偏心(xin)(xin)钻(zuan)(zuan)(zuan)(zuan)(zuan)头(tou)上设(she)有(you)(you)一(yi)肾形的(de)长圆轴的(de)配合(he)来传递的(de)；4、易(yi)于(yu)实现(xian)(xian)较大(da)(da)的(de)变径(jing)(jing)要(yao)(yao)求。长螺旋跟(gen)(gen)管(guan)(guan)(guan)(guan)钻(zuan)(zuan)(zuan)(zuan)(zuan)进(jin)(jin)管(guan)(guan)(guan)(guan)棚钻(zuan)(zuan)(zuan)(zuan)(zuan)孔(kong)轨(gui)迹控制方法管(guan)(guan)(guan)(guan)棚钢管(guan)(guan)(guan)(guan)钻(zuan)(zuan)(zuan)(zuan)(zuan)孔(kong)一(yi)旦出现(xian)(xian)孔(kong)斜或超出设(she)计允许(xu)偏差(cha)(cha)，会(hui)妨碍邻(lin)近钢管(guan)(guan)(guan)(guan)的(de)钻(zuan)(zuan)(zuan)(zuan)(zuan)设(she)，造(zao)成(cheng)洞体(ti)(ti)形状参差(cha)(cha)不(bu)齐，支护(hu)效果(guo)不(bu)好等结(jie)果(guo)；若(ruo)钢管(guan)(guan)(guan)(guan)下沉到(dao)一(yi)定(ding)程度(du)(du)，开挖(wa)时还需要(yao)(yao)切除，造(zao)成(cheng)间隔增(zeng)大(da)(da)，易(yi)坍塌。白云(yun)区管(guan)(guan)(guan)(guan)棚厂家——贵州合(he)纵达钢结(jie)构有(you)(you)限(xian)责任(ren)公(gong)司。乌鲁木齐146管(guan)(guan)(guan)(guan)靴批发厂家

钢(gang)(gang)管(guan)(guan)(guan)入土端制作(zuo)成(cheng)尖靴状或楔形，沿(yan)着开挖轮廓线(xian)，以(yi)较小(xiao)的(de)(de)(de)外插角，向(xiang)掌子面(mian)前(qian)方(fang)敷设(she)钢(gang)(gang)管(guan)(guan)(guan)或钢(gang)(gang)插板，末端支(zhi)(zhi)架在钢(gang)(gang)拱架上，形成(cheng)对(dui)开挖面(mian)前(qian)方(fang)围(wei)岩(yan)的(de)(de)(de)预支(zhi)(zhi)护。（3）管(guan)(guan)(guan)棚中的(de)(de)(de)钢(gang)(gang)管(guan)(guan)(guan)应按(an)照设(she)计(ji)要(yao)求进(jin)行(xing)加工和开孔(kong)，管(guan)(guan)(guan)内应灌(guan)注(zhu)水泥浆或水泥砂(sha)浆，以(yi)便提(ti)高(gao)钢(gang)(gang)管(guan)(guan)(guan)自身刚度(du)(du)和强(qiang)度(du)(du)。2.适用(yong)(yong)条件（1）适用(yong)(yong)于(yu)软弱(ruo)地(di)(di)层和特(te)殊(shu)困难地(di)(di)段，如极破碎岩(yan)体、塌方(fang)体、砂(sha)土质地(di)(di)层、强(qiang)膨胀性(xing)(xing)地(di)(di)层、强(qiang)流(liu)变性(xing)(xing)地(di)(di)层、裂隙发(fa)育岩(yan)体、断层破碎带、浅埋大偏(pian)压等(deng)围(wei)岩(yan)，并(bing)对(dui)地(di)(di)层变形有严(yan)格要(yao)求的(de)(de)(de)工程(cheng)。（二）技术(shu)要(yao)点（1）施工工艺流(liu)程(cheng)：测放孔(kong)位→钻(zuan)(zuan)(zuan)机(ji)就位→水平钻(zuan)(zuan)(zuan)孔(kong)→压入钢(gang)(gang)管(guan)(guan)(guan)→注(zhu)浆（向(xiang)钢(gang)(gang)管(guan)(guan)(guan)内和管(guan)(guan)(guan)周围(wei)土体）→封口。（2）管(guan)(guan)(guan)棚应根(gen)(gen)据地(di)(di)层情况、施工条件和环(huan)境要(yao)求选(xuan)用(yong)(yong)，并(bing)应符合以(yi)下(xia)要(yao)求：1）钢(gang)(gang)管(guan)(guan)(guan)间距(ju)应根(gen)(gen)据支(zhi)(zhi)护要(yao)求（如：防坍塌、控制建（构）筑物(wu)变形等(deng)）予(yu)以(yi)确定，宜为300〜500mm。2）双向(xiang)相(xiang)邻管(guan)(guan)(guan)棚的(de)(de)(de)搭接(jie)长度(du)(du)不小(xiao)于(yu)3m。（3）钻(zuan)(zuan)(zuan)孔(kong)顺序应由高(gao)孔(kong)位向(xiang)低孔(kong)位进(jin)行(xing)。钻(zuan)(zuan)(zuan)孔(kong)直径(jing)应比设(she)计(ji)管(guan)(guan)(guan)棚直径(jing)大20〜30mm。钻(zuan)(zuan)(zuan)杆方(fang)向(xiang)和角度(du)(du)应符合设(she)计(ji)要(yao)求。钻(zuan)(zuan)(zuan)孔(kong)过(guo)程(cheng)中应注(zhu)意钻(zuan)(zuan)(zuan)杆角度(du)(du)的(de)(de)(de)变化(hua)，并(bing)保证钻(zuan)(zuan)(zuan)机(ji)不移(yi)位。（4）管(guan)(guan)(guan)棚在顶(ding)进(jin)过(guo)程(cheng)中，应用(yong)(yong)测斜仪控制上仰角度(du)(du)。顶(ding)进(jin)完毕后(hou)应对(dui)每根(gen)(gen)管(guan)(guan)(guan)进(jin)行(xing)清(qing)孔(kong)处理。（5）钢(gang)(gang)管(guan)(guan)(guan)在安(an)装前(qian)应逐(zhu)孔(kong)逐(zhu)根(gen)(gen)进(jin)行(xing)编号；乌鲁木齐146管(guan)(guan)(guan)靴批发(fa)厂家专(zhuan)业经(jing)销〔合纵达钢(gang)(gang)结构〕管(guan)(guan)(guan)件!注(zhu)意!

贵州合纵(zong)达(da)钢结(jie)构有限责任公司推荐：跟(gen)管(guan)(guan)(guan)钻(zuan)(zuan)(zuan)(zuan)进(jin)分为偏心(xin)跟(gen)管(guan)(guan)(guan)钻(zuan)(zuan)(zuan)(zuan)进(jin)以(yi)及(ji)同心(xin)跟(gen)管(guan)(guan)(guan)钻(zuan)(zuan)(zuan)(zuan)进(jin)两(liang)种方式。偏心(xin)跟(gen)管(guan)(guan)(guan)钻(zuan)(zuan)(zuan)(zuan)进(jin)适用(yong)(yong)(yong)于孔(kong)(kong)深在40米(mi)以(yi)内并(bing)(bing)且无(wu)较(jiao)(jiao)多较(jiao)(jiao)大(da)的(de)(de)石头(tou)的(de)(de)地层(ceng)(ceng)。而(er)同心(xin)式跟(gen)管(guan)(guan)(guan)钻(zuan)(zuan)(zuan)(zuan)进(jin)则(ze)与之相(xiang)反(fan)，在孔(kong)(kong)深超(chao)过40米(mi)切地层(ceng)(ceng)中有较(jiao)(jiao)多较(jiao)(jiao)大(da)的(de)(de)石头(tou)是采(cai)用(yong)(yong)(yong)。当(dang)施(shi)工时(shi)(shi)遇上破碎层(ceng)(ceng)松软(ruan)的(de)(de)地质(zhi)，或者是很(hen)难(nan)成(cheng)孔(kong)(kong)的(de)(de)地层(ceng)(ceng)，在这种情况下，普通(tong)的(de)(de)钻(zuan)(zuan)(zuan)(zuan)进(jin)方式很(hen)难(nan)进(jin)行施(shi)工，此时(shi)(shi)就(jiu)(jiu)可以(yi)采(cai)用(yong)(yong)(yong)跟(gen)管(guan)(guan)(guan)钻(zuan)(zuan)(zuan)(zuan)进(jin)，不但解决了难(nan)题，也提高了工作效率。那么什么是跟(gen)管(guan)(guan)(guan)呢？跟(gen)管(guan)(guan)(guan)就(jiu)(jiu)是由国(guo)金(jin)金(jin)属制(zhi)作而(er)成(cheng)的(de)(de)一种金(jin)属管(guan)(guan)(guan)，它就(jiu)(jiu)是用(yong)(yong)(yong)来做跟(gen)管(guan)(guan)(guan)钻(zuan)(zuan)(zuan)(zuan)进(jin)施(shi)工的(de)(de)。跟(gen)管(guan)(guan)(guan)钻(zuan)(zuan)(zuan)(zuan)进(jin)技术虽然能轻松解决勘测或施(shi)工时(shi)(shi)遇到的(de)(de)难(nan)题，但它对跟(gen)管(guan)(guan)(guan)的(de)(de)要(yao)求非常高，而(er)且所(suo)采(cai)用(yong)(yong)(yong)的(de)(de)设备(bei)需要(yao)配(pei)置多种钻(zuan)(zuan)(zuan)(zuan)具(ju)。并(bing)(bing)且钻(zuan)(zuan)(zuan)(zuan)具(ju)的(de)(de)配(pei)置要(yao)尽量好一些，因为钻(zuan)(zuan)(zuan)(zuan)孔(kong)(kong)效率很(hen)大(da)程度上受它的(de)(de)影响。

贵(gui)州合纵达(da)钢(gang)结构(gou)有限责任公司(si)推荐：⒈如果(guo)管(guan)(guan)棚(peng)孔(kong)深(shen)度(du)(du)(du)≤30米(mi)(mi)，且砂卵石比(bi)较小，可(ke)利用(yong)(yong)进(jin)(jin)口(kou)动力头(tou)回(hui)(hui)转实(shi)现(xian)单作用(yong)(yong)双(shuang)回(hui)(hui)转，即内(nei)钻(zuan)(zuan)杆、套管(guan)(guan)同(tong)(tong)时(shi)回(hui)(hui)转及(ji)冲(chong)击(ji)(ji)，采(cai)用(yong)(yong)高(gao)(gao)压(ya)(ya)(ya)水(shui)排渣，降低(di)施(shi)(shi)工成本。⒉如果(guo)管(guan)(guan)棚(peng)孔(kong)深(shen)度(du)(du)(du)＞30米(mi)(mi)，可(ke)利用(yong)(yong)进(jin)(jin)口(kou)动力头(tou)实(shi)现(xian)内(nei)钻(zuan)(zuan)杆、套管(guan)(guan)同(tong)(tong)时(shi)回(hui)(hui)转，冲(chong)击(ji)(ji)利用(yong)(yong)中(zhong)高(gao)(gao)压(ya)(ya)(ya)气(qi)(qi)动潜孔(kong)锤(chui)配(pei)偏(pian)心(xin)/对心(xin)扩(kuo)(kuo)孔(kong)钻(zuan)(zuan)具实(shi)现(xian)，把(ba)高(gao)(gao)压(ya)(ya)(ya)水(shui)通过冲(chong)击(ji)(ji)器(qi)注入孔(kong)内(nei)。3.城市高(gao)(gao)层(ceng)建(jian)筑(zhu)基坑的(de)锚索孔(kong)钻(zuan)(zuan)进(jin)(jin)（覆盖层(ceng)跟管(guan)(guan)钻(zuan)(zuan)进(jin)(jin)）施(shi)(shi)工工艺(yi)(yi)同(tong)(tong)铁路隧道(dao)管(guan)(guan)棚(peng)钻(zuan)(zuan)进(jin)(jin)工艺(yi)(yi)一样。四、地(di)源热泵及(ji)水(shui)电围(wei)堰注浆孔(kong)的(de)钻(zuan)(zuan)进(jin)(jin)1.如果(guo)覆盖层(ceng)深(shen)度(du)(du)(du)≤30米(mi)(mi)，且砂卵石比(bi)较小，可(ke)采(cai)用(yong)(yong)进(jin)(jin)口(kou)动力头(tou)回(hui)(hui)转实(shi)现(xian)单作用(yong)(yong)双(shuang)回(hui)(hui)转，即内(nei)钻(zuan)(zuan)杆、套管(guan)(guan)同(tong)(tong)时(shi)回(hui)(hui)转和(he)冲(chong)击(ji)(ji)，采(cai)用(yong)(yong)高(gao)(gao)压(ya)(ya)(ya)水(shui)排渣，起拔套管(guan)(guan)效率(lv)高(gao)(gao)，降低(di)施(shi)(shi)工成本。在(zai)基岩(yan)(yan)上(shang)利用(yong)(yong)中(zhong)高(gao)(gao)压(ya)(ya)(ya)气(qi)(qi)动潜孔(kong)锤(chui)空气(qi)(qi)钻(zuan)(zuan)进(jin)(jin)，钻(zuan)(zuan)进(jin)(jin)深(shen)度(du)(du)(du)达(da)250米(mi)(mi)。2.如果(guo)覆盖层(ceng)深(shen)度(du)(du)(du)＞30米(mi)(mi)，或砂卵石比(bi)较大，可(ke)利用(yong)(yong)进(jin)(jin)口(kou)动力头(tou)实(shi)现(xian)内(nei)钻(zuan)(zuan)杆、套管(guan)(guan)同(tong)(tong)时(shi)回(hui)(hui)转，冲(chong)击(ji)(ji)利用(yong)(yong)中(zhong)高(gao)(gao)压(ya)(ya)(ya)气(qi)(qi)动潜孔(kong)锤(chui)配(pei)偏(pian)心(xin)/对心(xin)扩(kuo)(kuo)孔(kong)钻(zuan)(zuan)具实(shi)现(xian)。在(zai)基岩(yan)(yan)上(shang)利用(yong)(yong)中(zhong)高(gao)(gao)压(ya)(ya)(ya)气(qi)(qi)动潜孔(kong)冲(chong)击(ji)(ji)器(qi)钻(zuan)(zuan)进(jin)(jin)，钻(zuan)(zuan)孔(kong)深(shen)度(du)(du)(du)达(da)250米(mi)(mi)。云岩(yan)(yan)区管(guan)(guan)棚(peng)厂家——贵(gui)州合纵达(da)钢(gang)结构(gou)有限责任公司(si)。

贵州(zhou)合(he)纵达钢(gang)(gang)(gang)(gang)结构(gou)有限责任(ren)公司推荐：应(ying)当买(mai)同(tong)一品(pin)(pin)牌的(de)管(guan)(guan)(guan)(guan)(guan)(guan)材(cai)(cai)和管(guan)(guan)(guan)(guan)(guan)(guan)件，由(you)(you)于(yu)不(bu)(bu)(bu)同(tong)品(pin)(pin)牌的(de)产(chan)品(pin)(pin)原料也许不(bu)(bu)(bu)一样，对管(guan)(guan)(guan)(guan)(guan)(guan)材(cai)(cai)管(guan)(guan)(guan)(guan)(guan)(guan)件熔接会产(chan)生不(bu)(bu)(bu)利因素，长期使(shi)用中会引起熔接处渗漏。好的(de)钢(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)(guan)(guan)材(cai)(cai)强(qiang)度高而不(bu)(bu)(bu)是(shi)砸(za)不(bu)(bu)(bu)破，因此不(bu)(bu)(bu)能通过是(shi)否能够摔破来判断钢(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)(guan)(guan)材(cai)(cai)的(de)质量。由(you)(you)于(yu)钢(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)(guan)(guan)材(cai)(cai)的(de)抗冲击性要优于(yu)真正的(de)钢(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)(guan)(guan)材(cai)(cai)，因此钢(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)(guan)(guan)材(cai)(cai)较容易砸(za)碎，砸(za)不(bu)(bu)(bu)碎的(de)往(wang)往(wang)是(shi)钢(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)。说了这么多我们可(ke)以看出，钢(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)在现在建筑工程施工中起着非常重要的(de)作用。不(bu)(bu)(bu)同(tong)的(de)钢(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)规格(ge)型号(hao)，对应(ying)不(bu)(bu)(bu)同(tong)的(de)建筑用途(tu)。把握好钢(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)的(de)选购(gou)技巧(qiao)是(shi)很有必要的(de)。水城跟(gen)管(guan)(guan)(guan)(guan)(guan)(guan)厂家——贵州(zhou)合(he)纵达钢(gang)(gang)(gang)(gang)结构(gou)有限责任(ren)公司。青海跟(gen)管(guan)(guan)(guan)(guan)(guan)(guan)加盟

观(guan)山(shan)湖(hu)区跟管(guan)厂(chang)家——贵州(zhou)合(he)纵达钢结(jie)构有限(xian)责任公司。乌鲁木(mu)齐(qi)146管(guan)靴批发厂(chang)家

喷(pen)射(she)混(hun)凝土初(chu)期(qi)(qi)支(zhi)(zhi)(zhi)(zhi)护(hu)(hu)(hu)：(1)隧(sui)道(dao)在稳(wen)定(ding)岩(yan)体中可先(xian)开挖(wa)(wa)后支(zhi)(zhi)(zhi)(zhi)护(hu)(hu)(hu)，支(zhi)(zhi)(zhi)(zhi)护(hu)(hu)(hu)结构(gou)距(ju)(ju)开挖(wa)(wa)面(mian)不(bu)宜(yi)大(da)于(yu)5m；在不(bu)稳(wen)定(ding)岩(yan)土体中，支(zhi)(zhi)(zhi)(zhi)护(hu)(hu)(hu)必(bi)须(xu)紧(jin)跟土方开挖(wa)(wa)工序。▼喷(pen)射(she)混(hun)凝土(2)钢(gang)筋(jin)格(ge)栅拱架就位(wei)后，必(bi)须(xu)支(zhi)(zhi)(zhi)(zhi)撑(cheng)(cheng)稳(wen)固(gu)，及时(shi)按(an)设计要(yao)(yao)求(qiu)焊（栓）连(lian)接(jie)成(cheng)(cheng)稳(wen)定(ding)整体。▼钢(gang)拱架(3)初(chu)期(qi)(qi)支(zhi)(zhi)(zhi)(zhi)护(hu)(hu)(hu)应预埋(mai)注浆(jiang)(jiang)管(guan)(guan)，结构(gou)完成(cheng)(cheng)后，及时(shi)注浆(jiang)(jiang)加固(gu)，填(tian)充注浆(jiang)(jiang)滞后开挖(wa)(wa)面(mian)距(ju)(ju)离不(bu)得(de)大(da)于(yu)5m。▼注浆(jiang)(jiang)(三(san)）超前导(dao)(dao)管(guan)(guan)与管(guan)(guan)棚(1)围岩(yan)自稳(wen)时(shi)间小(xiao)于(yu)支(zhi)(zhi)(zhi)(zhi)护(hu)(hu)(hu)完成(cheng)(cheng)时(shi)间的地段，应根据(ju)地质条件(jian)、开挖(wa)(wa)方式、进(jin)(jin)度要(yao)(yao)求(qiu)、使用(yong)机(ji)具(ju)（械)情况，对围岩(yan)采(cai)取(qu)锚(mao)杆或小(xiao)导(dao)(dao)管(guan)(guan)超前支(zhi)(zhi)(zhi)(zhi)护(hu)(hu)(hu)、小(xiao)导(dao)(dao)管(guan)(guan)周边注浆(jiang)(jiang)等安(an)全技术措施(shi)。当围岩(yan)整体稳(wen)定(ding)难以控制或上部有(you)特殊(shu)要(yao)(yao)求(qiu)可采(cai)用(yong)管(guan)(guan)棚支(zhi)(zhi)(zhi)(zhi)护(hu)(hu)(hu)。▼小(xiao)导(dao)(dao)管(guan)(guan)▼管(guan)(guan)棚(2)钻孔中遇到障碍，必(bi)须(xu)停(ting)止钻进(jin)(jin)作业，待(dai)采(cai)取(qu)措施(shi)并确认安(an)全后，方可继续钻进(jin)(jin)，严(yan)禁强行钻进(jin)(jin)。(四）现(xian)浇混(hun)凝土二次(ci)衬砌(1)现(xian)浇混(hun)凝土二次(ci)衬砌在隧(sui)道(dao)初(chu)期(qi)(qi)支(zhi)(zhi)(zhi)(zhi)护(hu)(hu)(hu)变形稳(wen)定(ding)后进(jin)(jin)行。初(chu)期(qi)(qi)支(zhi)(zhi)(zhi)(zhi)护(hu)(hu)(hu)临时(shi)支(zhi)(zhi)(zhi)(zhi)撑(cheng)(cheng)的拆除严(yan)格(ge)按(an)设计要(yao)(yao)求(qiu)分段进(jin)(jin)行。▼二次(ci)混(hun)凝土(2)钢(gang)筋(jin)绑扎(zha)中。乌(wu)鲁木齐146管(guan)(guan)靴(xue)批(pi)发(fa)厂家

本文来(lai)自海(hai)润达物(wu)联(lian)科技有限责任公(gong)司：//qfd1mz.cn/Article/40f07899881.html