Critical Sewers

What Does Critical Sewers Mean?

临界下水道指的是那些在发生故障时的下水道，将在维修和交通延误方面产生高成本。它还指的是那些被认为是战略重要的下水道。临界下水道可以通过评估下水道的失败可能导致康复和经济损失的成本来确定的临界下水道。

Trenchless rehabilitation methods, such as robot mounted closed-circuit television cameras (CCTV), can be used for the purpose of determining the condition of sewers.

Trenchlesspedia Explains Critical Sewers

Identifying critical sewers is important especially if they lie in zones of high traffic or environmentally sensitive areas. Critical sewers can be broadly classified into two categories.

Critical Sewers Category A Includes:

• Brick sewers 2-meters or more deep or sewer pipes of other materials that are installed more than 6-meters deep in good ground or more than 5-meters deep in bad ground
• Sewers with a diameter greater than 1,500-mm
• Sewers under critical traffic flows exceeding 7,500 vehicles per day
• 铁路下的下水道，河流，高速公路和运河下

Critical Sewers Category B Includes:

• 砖下水道高达1米深层和下水道的其他材料深度超过3米
• Sewers with diameter 600 to 1,500-mm
• 下水道在关键的交通流量下超过5000辆车
• Sewers within high risk installation areas, industrial sites, or where failure of a critical sewer can lead to pollution of environmentally sensitive areas or water bodies

古老的下水道系统,哈哈ve deteriorated or crossed their expected life expectancy should be replaced, especially those falling under Category A or B mentioned above, to prevent potential harmful consequences resulting from failure, before failure occurs. Trenchless construction and rehabilitation methods have made it easier to install, replace or repair pipes easily, quickly, and without causing disruption to traffic flow.