公路隧道通风竖井施工及探测技术  

Construction and detection technology of ventilation shafts in highway tunnels

作　　者：陈旭东 Chen Xudong(Gansu Provincial Highway and Transportation Construction Group Co.,Ltd.,Lanzhou Gansu 730030,China)

机构地区：[1]甘肃省公路交通建设集团有限公司,甘肃兰州730030

出　　处：《山西建筑》2024年第13期182-184,188,共4页Shanxi Architecture

摘　　要：结合某隧道通风竖井,采用先行开凿一个超前小口径先导孔,再使用破岩滚刀逆向扩挖形成溜渣导孔,最后进行正向爆破扩挖竖井;具有操作简单、安全等优点,改善了劳动条件,降低了劳动强度。破岩滚刀刚度大,单位时间工效较高,能够快速逆挖形成溜渣导孔。采用3D移动扫描仪,凭借强大的SLAM(同步定位与建图)尖端技术和大测程性能,通过3D模型数据的精确分析和直接观察,判断破碎带溜渣导孔的变化情况,对溜渣导孔采取钢护筒预支护措施,可有效消除正向爆破扩挖过程中溜渣导孔堵塞等不利影响因素,安全水平显著提升。This article combines the ventilation shaft of a certain tunnel,using the method of first drilling a leading small diameter pilot hole,then using a rock breaking roller to reverse expand and form a slag sliding guide hole,and finally conducting forward blasting to expand the shaft;It has the advantages of simple operation,safety,improved working conditions,and reduced labor intensity.The rock breaking roller cutter has high stiffness and efficiency per unit time,and can quickly reverse excavate to form a slag sliding guide hole.By using a 3D mobile scanner and utilizing powerful SLAM(synchronous positioning and mapping)cutting-edge technology and large range performance,precise analysis and direct observation of 3D model data can be used to determine the changes in the slag guide hole in the crushing zone.Steel casing pre support measures can be taken for the slag guide hole,effectively eliminating adverse factors such as blockage of the slag guide hole during forward blasting and excavation,and significantly improving the safety level.

关 键 词：竖井 先导孔 溜渣导孔 3D扫描技术 钢护筒支护 

分 类 号：TU997[建筑科学—市政工程]