Understanding the damage mechanism of glacial debris flow mitigation systems is crucial for the risk prevention and assessment of the 200 km traffic corridor in the Southeast of the Tibetan Plateau, where the Sichuan-Tibet railway and expressway have been planned. Based on the phenomena, position and residual efficiency of damaged engineering, our analysis of satellite imagery and field investigation in multitype spatial reveals the damage types and influencing factors of glacial debris flow mitigation engineering. An evaluation model which can be used to estimate the engineering damage grade is established by using the relationship between mono engineering works and mitigation systems. In the new model, the engineering damage is divided into five grades: undamaged, slightly damaged, relatively damaged, seriously damaged, and totally damaged. For glacial debris flow in the Parlung river basin, the five grades of damage of mitigation works account for 8.70%, 34.78%, 21.74%, 13.04% and 21.74%, respectively. Furthermore, the soil source type and channel profile gradient are the key factors in engineering damage. Design defect of profile gradient is the controlling factor of damage in drainage channel engineering. Based on those results, an engineering damage model is established, which can provide an important reference for risk reduction and prevention of hazards due to the increasing development of traffic engineering.

中文翻译：

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青藏高原东南部帕隆河流域冰川泥石流减灾工程破坏模型及影响因素

了解冰川泥石流减缓系统的破坏机制，对于青藏高原东南部200公里交通走廊的风险防范和评估至关重要，川藏铁路和高速公路已在此规划建设。基于受损工程的现象、位置和剩余效率，我们在多类型空间中通过卫星图像分析和野外调查揭示了冰川泥石流减缓工程的破坏类型和影响因素。利用单体工程量与减灾系统之间的关系，建立了可用于估算工程损害等级的评价模型。新模型将工程破坏分为五个等级：未破坏、轻度破坏、相对破坏、严重破坏和完全破坏。对于帕隆河流域冰川泥石流，减灾工程的五级损害分别占8.70%、34.78%、21.74%、13.04%和21.74%。此外，土源类型和河道剖面梯度是造成工程破坏的关键因素。剖面坡度设计缺陷是排水渠道工程损坏的控制因素。在此基础上建立了工程损伤模型，为交通工程日益发展的减灾防灾提供了重要参考。剖面坡度设计缺陷是排水渠道工程损坏的控制因素。在此基础上建立了工程损伤模型，为交通工程日益发展的减灾防灾提供了重要参考。剖面坡度设计缺陷是排水渠道工程损坏的控制因素。在此基础上建立了工程损伤模型，为交通工程日益发展的减灾防灾提供了重要参考。