关键的外卖
According to a press release from the Common Ground Alliance (CGA), based on the findings of its Damage Information Reporting Tool (DIRT) Report, there were over 509,000 reported cases of excavated-related damages tounderground utilities2018年。该数字代表2017年损坏的公用事业数量增加了16％。
这些惊人的统计数据突出了期间需要适当的安全措施挖掘钻孔和open-cut excavations。In this article, we will highlight some of the most catastrophic digging disasters to occur in the last two decades.
Kansas City, Kansas — February 19, 2013
2013年2月19日，一个gas pipeline explosion在乡村俱乐部广场西侧的910 W 48th St.的餐厅大楼。事件导致其中一家餐馆的员工死亡并受伤了15名其他人。
An investigation into the explosion determined that it was the direct result of trenchless drilling and installation activities at a nearby construction site. At the time, a contractor for the Time Warner Cable Company was allegedly in the process of installing telecommunications fiber optic cables using水平定向钻孔（HDD）。(ReadWhat is Horizontal Directional Drilling?)
During the installation, which took place across the street from the building, the drill struck a 2-inch diameter polyethylene (PE) gas main along the north side of W 48th St.. The natural gas escaped the main and migrated through thebackfillbeneath the asphalt roadway into nearby sanitary sewer piping. The escaped gas then accumulated in the restaurant where it ignited and exploded.
The restaurant and building owner successfully sued the Time Warner Company for negligence for a total of $5.9 million in damages.
Bergenfield, New Jersey — December 13, 2005
A gas explosion in an apartment in Bergenfield, New Jersey, occurred after natural gas migrated into the structure following damage to a nearby pipeline. The incident transpired on December 13, 2005, during the removal of an underground oil tank at a nearby parking lot located adjacent to the building.
During tank removal operations, a break in an underground 1¼-inch steel natural gas line was discovered. The break occurred at a threaded tee section, downstream from where excavators were in the process of removing the oil tank.
Natural gas migrated into the building and ignited, causing a devastating explosion, which resulted in thedeaths of three apartment residents。在事件中也受伤了四名居民和坦克拆除工人。根据卑尔根税收记录，建筑物的总损害被评估为863,300美元。
Apost-incident analysisconducted by the National Transportation Safety Board determined that the main cause of the rupture of the gas pipeline was negligence by the American Tank Service Company. The company had failed to adequately support the natural gas line from soil movement (shifting) during excavation.
As a result, the pipeline experienced excessive deflection, causing it to burst and release gas into the apartment building.
Murrieta, California — July 15, 2019
Anothergas pipeline explosionresulted in the death of one person and injured 15 more. This particular incident occurred at a house in Murrieta, California, on July 15, 2019. According to reports, a contractor conducting home improvement on the home struck the natural gas line and subsequently reported the incident to the Southern California Gas Company (SoCalGas).
Personnel from SoCalGas arrived on the scene shortly before 11am to repair the broken line. Just over an hour later (12:10am), the explosion occurred. An employee of the gas company perished, while the injured 15 were transported to hospital and treated for their injuries.
Investigations进入爆炸事业确定，承包商没有联系指定的当局，以确定法律要求的现有埋地公用事业的位置。
McKinney, Texas — May 16, 2008
On May 16, 2008, near Hwy. 5 in McKinney, Texas,two houses explodedwhen a construction crew accidentally struck a gas line in the neighborhood. According to McKinney Fire Chief Mark Wallace, a construction crew was working at a nearby street when they hit an underground gas line at approximately 5:30pm.
六分钟后，煤气在附近的家中看到并点燃，导致其中两个爆炸。第三件屋在事件发生时也引起了火灾。幸运的是，没有人在爆炸中被杀;然而，三个人受到严重伤害，不得不在当地医院空中进行紧急治疗。
The injuries sustained during this incident were also attributed to the inadequate response of emergency personnel. According to reports, more than an hour after the gas leakage, none of the homeowners were informed of the leak, nor were any of them evacuated from their homes.
Portland, Oregon — October 19, 2016
On October 19, 2016, a大爆炸发生在俄勒冈州波特兰的西北区邻里，在NW 23RD Ave.和NW Glisan街。在安装康卡斯人行道中的接线盒期间，挖掘机与埋入的气体管道接触。虽然管道没有破裂，但它从位于下游的阀门中拉出。
This resulted in a massive leak, which caused the gas to travel under the sidewalk, and into the basement of Alfred C. F. Burkhardt House located at 500 NW 23rd Ave.. The gas ignited, totally destroying the building and causing considerable damage to surrounding structures.
While there were no fatalities, the explosion受伤的八个人和damaged a total of 13 buildings. An investigation conducted by the Oregon Public Utility Commission concluded that the accident was due to insufficient notice to the Utility Notification Center by the contractor.
Up to 2019,诉讼were still being filed against the contractor as a result of the incident.
Final Words
While these disasters had different outcomes, they all have one element in common; in each case, the digging contractor failed to properly assess the presence of existing utilities in the area. In the United States, federal law requires that all organizations contact their localOne-Call organization (811)before performing any excavations.
然后，一次性通过联系相关的公用事业公司或走向现场并物理地确定埋地基础设施的位置，确认该地区公用事业的存在。
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