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顶管机工作中的常见故障解决方法

发布时(shi)间:2019-10-29人气:

顶管(guan)机和很多(duo)设备一样,使用(yong)过程中(zhong)难免会(hui)出(chu)现故(gu)(gu)障(zhang),在出(chu)现故(gu)(gu)障(zhang)后我(wo)们(men)只需要仔细(xi)检(jian)查,找出(chu)原因,对症下药(yao),今天我(wo)们(men)要讲的就是(shi)顶管(guan)机工作中(zhong)容易出(chu)现的小(xiao)故(gu)(gu)障(zhang)以及解决故(gu)(gu)障(zhang)的方法,希(xi)望对大家(jia)有所帮(bang)助。

顶(ding)管机它先由工(gong)作井中(zhong)(zhong)的(de)(de)(de)(de)主(zhu)顶(ding)进(jin)(jin)油缸(gang)推动顶(ding)管机前进(jin)(jin),同时大(da)刀盘旋转切(qie)削(xue)土(tu)体(ti),切(qie)削(xue)下的(de)(de)(de)(de)土(tu)体(ti)进(jin)(jin)入密封土(tu)仓与(yu)螺(luo)旋输(shu)(shu)送机中(zhong)(zhong),并被挤压(ya)形成具有一(yi)定(ding)土(tu)压(ya)的(de)(de)(de)(de)压(ya)缩(suo)土(tu)体(ti);经过螺(luo)旋输(shu)(shu)送机的(de)(de)(de)(de)旋转,输(shu)(shu)送出切(qie)削(xue)的(de)(de)(de)(de)土(tu)体(ti)。密封土(tu)仓内的(de)(de)(de)(de)土(tu)压(ya)力(li)值可通过螺(luo)旋输(shu)(shu)送机的(de)(de)(de)(de)出土(tu)量或(huo)顶(ding)管机的(de)(de)(de)(de)前进(jin)(jin)速度来(lai)控制(zhi),使此土(tu)压(ya)力(li)与(yu)切(qie)削(xue)面前方的(de)(de)(de)(de)静止土(tu)压(ya)力(li)和地下水(shui)压(ya)力(li)保持平衡,从而保证(zheng)开挖面的(de)(de)(de)(de)稳定(ding),防止地面的(de)(de)(de)(de)沉降或(huo)隆(long)起。

顶管机工作中的常见故障解决方法

从理论上讲,顶管机在顶进过程中,其中土仓的压力P如果小于顶进土层的主动土压力Pa,即P<Pa时,地面就会下沉;反之如果P>Pa时,地面就会产生隆起。施工过程中的(de)沉(chen)(chen)降(jiang)是一(yi)(yi)个逐渐演变(bian)的(de)过程,尤其(qi)在粘性土中,要(yao)达到更终沉(chen)(chen)降(jiang)所经(jing)历的(de)时间会比(bi)较长;然而沉(chen)(chen)降(jiang)却是一(yi)(yi)个会立即反(fan)应出来(lai)的(de)迅速变(bian)化的(de)过程。降起的更高点是沿土体的滑裂面上升,并更终反映到距顶管机前方一定距离的地面上,裂缝更高点呈放射状延伸。

由于大刀盘(pan)无面板(ban),其(qi)开口率接(jie)近(jin)100%,所(suo)以设在隔仓(cang)板(ban)上的土(tu)压(ya)(ya)计所(suo)测得的土(tu)压(ya)(ya)力值就近(jin)似于掘削(xue)面的土(tu)压(ya)(ya)力。以上就是(shi)关于顶管(guan)机工作原理(li)的内容(rong)。

顶管机工作中的常见故障解决方法

顶(ding)管(guan)机(ji)当顶(ding)管(guan)机(ji)施工时的掘进机(ji)头发(fa)生故障和刀盘还能(neng)转(zhuan)动(dong)的情况(kuang)下,并且(qie)顶(ding)管(guan)机(ji)在(zai)外部(bu)条件阻(zu)碍下很(hen)难用其它办法来解(jie)决该问题,在(zai)接收井处用同型号顶(ding)管(guan)机(ji)逆向顶(ding)进,实现(xian)对接后,此推彼拉,完成(cheng)顶(ding)进工作的一种方法。

症状:在W29-W30段施工中,顶段长140m,顶至90m处时,机内发出类似金属卡壳声,刀盘扭矩表出现波动。同时,泥水箱内发现大量漂浮油渍。此时主顶油缸顶力为60T。

诊断:机内动密封件磨损,泥浆水混入轴体,造成主轴承损坏,应立即停止顶进。

顶管机工作中的常见故障解决方法

对策(ce):鉴于地表无开挖的条件,且逆套管法施工距离较长,地下流沙严重。分析目前机械运行情况,发现机头刀盘在无重负荷时,运行尚属正常。因此,采用同型号机头在接收井W30按同轴线逆向顶进,实现对接后,W29#井继续顶进,W30#井处机头回拉。

顶(ding)管(guan)机施工注意事(shi)项:如何(he)准确无误地确定(ding)原(yuan)机头(tou)(tou)走向,标高及(ji)现机头(tou)(tou)轴线(xian)是成功的关键(jian),刀盘对接(jie)后,需同向转动,推进(jin)与回拉均需同步进(jin)行。

顶管机工作中的常见故障解决方法

症(zheng)状:管线穿越铁路原下行立交匝道边,刀盘扭矩超限波动,前有异状物迹象,退回主顶液压油缸,异动消失。

诊断:刀盘处遇较大障碍物,疑为砼基础。

对策:由于该处正在新建跨铁路立交,机头位置地面均为回填土方,建议采用钢板桩支护开挖,用镐头挖机破碎砼块后作清障处理。

以上就是金达顶(ding)(ding)管机(ji)工(gong)作中的常见故(gu)障及解决故(gu)障的措(cuo)施的具体说明,如果还有(you)疑问,欢迎您(nin)来电咨询,我们为您(nin)持(chi)续更新(xin)更多(duo)泥水平衡(heng)顶(ding)(ding)管机(ji)相关说明,您(nin)可以关注我们网(wang)站(zhan)了解更多(duo)顶(ding)(ding)管机(ji)资讯。

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