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沿禄刚(Rokko)山脉北坡修建的一条由神户(Kobe City)污水局设计的污水干线,其隧洞掘进工程采用的是一台由川崎重工业有限公司制造的、带喷射泵泥浆输送系统的、适应全地层条件(全系列)的全断面隧道掘进机(TBM)。 隧洞掘进直径为2.0m。 施工设计和配套装备工作由总承包商Ohbayashi公司完成。掘进的隧洞总长3342.4m,工程于1984年4月开工,1985年6月竣工。 根据有关记录,最大日进尺达31.9m,最大月进尺达493.1m。 掘进机是在以砾石、流纹岩、凝灰角砾岩和板岩为特征的地质条件下进行开挖的。在有限的地段遇到了大多数为粘土的软土地带。在后一种情况下,采取以钢制管片代替钢肋支撑。 隧洞线路在弯曲的公路下面通过。因此,40％以上的长度呈现出有一个半径为50～200m的曲率。 由于具有一个先进的喷射泵泥浆输送方案,既使通风能力很小,也能成功地获得粉尘很少的有利的施工环境。 按停机时间即掘进机利用率来说,泥浆输送方案明显优于弃碴运输车方案。因为开挖必须穿过一个很长的的隧洞。
A sewer line designed by the Kobe City Sewerage Bureau along the northern slope of the Rokko Mountains uses a tunnel boring machine constructed by Kawasaki Heavy Industries Co., Ltd. with a jet pump mud delivery system, Full face tunnel boring machine (TBM) adapted to all formation conditions (full range). Tunneling diameter of 2.0m. Construction design and equipment work by the general contractor Ohbayashi completed. Tunneling total length of 3342.4m, the project started in April 1984, completed in June 1985. According to the records, the maximum daily footage reached 31.9m, the maximum monthly footage reached 493.1m. Roadheaders are excavated under geological conditions characterized by gravel, rhyolite, tuff breccia and slate. In the limited area encountered most of the clay soft soil. In the latter case, steel pipe is used instead of steel rib support. Tunnel lines pass under curved roads. Therefore, more than 40% of the length presents a radius of 50 ~ 200m curvature. Thanks to a state-of-the-art jet pump mud delivery solution, it is possible to successfully achieve a very favorable dust-free construction environment, even with low ventilation capacity. According to the downtime that boring machine utilization, mud transport program was significantly better than the ballast truck program. Because excavation must go through a long tunnel.