Geohazards along highways are the main natural hazards that could affect the safety and operation of highway systems.Understanding the risks faced by highways in areas affected by geohazards is an urgent problem to be...Geohazards along highways are the main natural hazards that could affect the safety and operation of highway systems.Understanding the risks faced by highways in areas affected by geohazards is an urgent problem to be solved.This study used historical geohazard events from Sichuan Province and highway network data to propose a geohazard risk index that reflects the risk geohazards along highways.Furthermore,this work applied the entropy method and expert scoring to calculate the weight of the index.The spatial distributions of landslides,debris flows,collapses,and unstable slopes along the highways were analysed based on ArcGIS spatial statistics,and the highway geohazard intensity index were obtained.The relationships between slope,rainfall,vegetation coverage,rock type,land use,and incision depth with geohazards were analysed,and the highway geohazard susceptibility index was calculated by the weighted information method.Based on the intensity and susceptibility index,we obtained a geohazard risk index which can better evaluate the risk of highways,and made a highway geohazard risk map to aid the prevention and mitigation of geohazards along highways and assist with highway network planning.展开更多
目的探讨经皮椎体成形术治疗老年骨质疏松性胸腰椎压缩性骨折的临床效果。方法选择2017年1月~2019年6月九江市第一人民医院收治的50例老年骨质疏松性胸腰椎压缩性骨折患者为对象,将其分为两组,分组方式按照随机抽签法。给予对照组常规...目的探讨经皮椎体成形术治疗老年骨质疏松性胸腰椎压缩性骨折的临床效果。方法选择2017年1月~2019年6月九江市第一人民医院收治的50例老年骨质疏松性胸腰椎压缩性骨折患者为对象,将其分为两组,分组方式按照随机抽签法。给予对照组常规复位治疗方法,给予研究组经皮椎体成形术治疗方法。比较两组的治疗效果、治疗前及治疗后腰痛(ODI)评分、治疗前及治疗后视觉模拟量表(VAS)评分、治疗后椎体恢复情况,治疗后并发症发生情况。结果研究组临床治疗总有效率高于对照组,差异有统计学意义(P<0.05);研究组治疗后3、7、14 d ODI评分均低于对照组,差异有统计学意义(P<0.05);研究组治疗后3、7、14 d VAS评分均低于对照组,差异有统计学意义(P<0.05);研究组治疗后Cobb角低于对照组,差异有统计学意义(P<0.05);研究组治疗后后缘高度、中线高度、前缘高度高于对照组,差异有统计学意义(P<0.05);研究组治疗后并发症总发生率低于对照组,差异有统计学意义(P<0.05)。结论老年骨质疏松性胸腰椎压缩性骨折实施经皮椎体成形术治疗的临床效果确切。展开更多
基金funded by Chang’an University(Xi’an,China)through the National Key Research&Development Program of China(2020YFC1512003)。
文摘Geohazards along highways are the main natural hazards that could affect the safety and operation of highway systems.Understanding the risks faced by highways in areas affected by geohazards is an urgent problem to be solved.This study used historical geohazard events from Sichuan Province and highway network data to propose a geohazard risk index that reflects the risk geohazards along highways.Furthermore,this work applied the entropy method and expert scoring to calculate the weight of the index.The spatial distributions of landslides,debris flows,collapses,and unstable slopes along the highways were analysed based on ArcGIS spatial statistics,and the highway geohazard intensity index were obtained.The relationships between slope,rainfall,vegetation coverage,rock type,land use,and incision depth with geohazards were analysed,and the highway geohazard susceptibility index was calculated by the weighted information method.Based on the intensity and susceptibility index,we obtained a geohazard risk index which can better evaluate the risk of highways,and made a highway geohazard risk map to aid the prevention and mitigation of geohazards along highways and assist with highway network planning.
文摘目的探讨经皮椎体成形术治疗老年骨质疏松性胸腰椎压缩性骨折的临床效果。方法选择2017年1月~2019年6月九江市第一人民医院收治的50例老年骨质疏松性胸腰椎压缩性骨折患者为对象,将其分为两组,分组方式按照随机抽签法。给予对照组常规复位治疗方法,给予研究组经皮椎体成形术治疗方法。比较两组的治疗效果、治疗前及治疗后腰痛(ODI)评分、治疗前及治疗后视觉模拟量表(VAS)评分、治疗后椎体恢复情况,治疗后并发症发生情况。结果研究组临床治疗总有效率高于对照组,差异有统计学意义(P<0.05);研究组治疗后3、7、14 d ODI评分均低于对照组,差异有统计学意义(P<0.05);研究组治疗后3、7、14 d VAS评分均低于对照组,差异有统计学意义(P<0.05);研究组治疗后Cobb角低于对照组,差异有统计学意义(P<0.05);研究组治疗后后缘高度、中线高度、前缘高度高于对照组,差异有统计学意义(P<0.05);研究组治疗后并发症总发生率低于对照组,差异有统计学意义(P<0.05)。结论老年骨质疏松性胸腰椎压缩性骨折实施经皮椎体成形术治疗的临床效果确切。
