Study on coupling of subway shield tunneling safety risk based on improved N-K model

doi:10.16265/j.cnki.issn1003-3033.2024.02.0385

Abstract

Abstract:

In order to effectively prevent and control the key safety risks in subway shield tunneling construction and accurately judge which risk coupling scenarios were significant ones leading to accidents, an improved N-K model was proposed to study the coupling effect of safety risks in subway shield tunneling. The key safety risks of subway shield tunneling were identified by comprehensively using literature research, accident case analysis and expert interview. Based on the N-K model, a new coupling analysis model of subway shield tunneling safety risk was proposed, and the applicability of the model was verified by a safety accident case. The results show that the list of key safety risk factors of subway shield tunneling is obtained, including 4 first-level risk factors (i.e., personnel-type, equipment-type, environment-type and management-type safety risks) and 21 second-level risk factors. The safety risk value of subway shield tunneling construction increases with the increase of coupling factors. Safety risk coupling values with four factors are the highest, followed by the coupling values of three factors, and safety risk coupling values with two factors are the lowest. Coupling scenarios with workers' low safety awareness and machine failure participating are more susceptible to safety accidents.

Key words: improved N-K model, subway shield tunneling, safety risk, risk factor, risk coupling

CLC Number:

X948

ZHANG Jianshe, HUANG Yanlong, LI Hujun, CHEN Huihua, HE Kuang, DAI Zishuang. Study on coupling of subway shield tunneling safety risk based on improved N-K model[J]. China Safety Science Journal, 2024, 34(2): 67-75.

Figures/Tables 7

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安全风险因素	术语含义	来源
安全意识薄弱	在作业过程中自我保护意识差、思想认识不到位	PAN Haize等^[7],事故案例
综合水平不高	专业文化知识不足、专业技能水平不高	陈辉华等^[17],事故案例
违章违规操作	违反安全规章和制度	事故案例
操作失误	由于作业人员生理、心理等因素而引起的操作不当	事故案例
机械故障、磨损	由于设备设计缺陷或使用不当等原因导致设备故障	LU Hui等^[1]
盾构掘进参数	掘进参数异常或输入错误	ZHOU Hong等^[18]
材料设备检测维护不足	未检验进场的材料和设备	事故案例
材料不符合要求	施工选用的材料不符合国际标准的规定	事故案例
盾构机与地质不匹配	地质与所选盾构机不匹配	事故案例
地质环境复杂	岩石类型、硬度、混合地面条件、岩质、软弱地基、溶洞等	钱王苹^[19]、李蒙^[20]等,事故案例
地下水丰富度	地下水位、地下水丰度、降雨季节分布	CHUNG等^[16]
敏感环境	周围存在桩基、既有隧道等	事故案例
技术、政策环境	在相关技术、标准和规范未出台时发生的事故	PAN Haize^[7]、QIE Zijun^[21]等
管理体系混乱	管理层对安全生产缺乏重视及未执行安全法规和制度	事故案例
人员安全教育不到位	未执行安全教育和培训、技术交底不到位	WU Zhiqiang等^[15],事故案例
人员安排与分工不合理	关键岗位员工缺失	事故案例

序号	一级安全风险因素	二级安全风险因素
1	人员风险因素	作业人员能力不足
		作业人员安全意识薄弱
		管理人员能力不足
		管理人员安全意识薄弱
		违章违规操作
		操作失误
2	设备风险因素	机械故障、磨损
		盾构机不合理运用
		材料、设备检测维护不到位
		设备设计缺陷
		材料不符合要求
3	环境风险因素	不良地形地质(岩质、软弱地基、溶洞等)
		技术、政策环境
		敏感环境(地下管线、既有隧道等)
		地下水丰富度
4	管理风险因素	管理制度不健全
		管理责任未落实
		管理措施落实不到位
		监管不力
		人员安排与分工不合理
		安全培训、技术交底不到位

单因素风险耦合			双因素风险耦合			多因素风险耦合
事件	次数	频率	事件	次数	频率	事件	次数	频率
0000	0	0.000 0	1100	3	0.032 3	1110	2	0.021 5
1000	6	0.064 5	1010	5	0.053 8	1101	7	0.075 3
0100	5	0.053 8	1001	12	0.129 0	1011	12	0.129 0
0010	8	0.086 0	0110	12	0.129 0	0111	3	0.032 3
0001	4	0.043 0	0101	6	0.064 5	1111	5	0.053 8
—	—	—	0011	3	0.032 3	—	—	—

单因素风险耦合概率	双因素风险耦合概率		3因素风险耦合概率			4因素风险耦合概率
P_0…=0.440 9	P_00··=0.161 3	P_0·0·=0.161 3	P_000·=0.043 0	P_001·=0.118 3	P_010·=0.118 3	P₀₀₀₀=0.000 0
P_·0··=0.537 6	P_0··0=0.268 8	P_·00·=0.236 5	P_011·=0.161 3	P_100·=0.193 5	P_101·=0.182 8	P₀₀₀₁=0.043 0
P_··0·=0.462 4	P_·0·0=0.204 3	P_··00=0.150 6	P_110·=0.107 6	P_111·=0.075 3	P_00·0=0.086 0	P₀₀₁₀=0.0860
P_…0=0.440 9	P_01··=0.279 6	P_0·1·=0.279 6	P_00·1=0.075 3	P_01·0=0.182 8	P_01·1=0.096 8	P₀₀₁₁=0.032 3
P_1…=0.559 2	P_0··1=0.172 1	P_·01·=0.301 1	P_10·0=0.118 3	P_10·1=0.258 0	P_11·0=0.053 8	P₀₁₀₀=0.053 8
P_·1··=0.46 25	P_·0·1=0.333 3	P_··01=0.311 8	P_11·1=0.129 1	P_0·00=0.053 8	P_0·01=0.107 5	P₀₁₀₁=0.064 5
P_··1·=0.537 7	P_10··=0.376 3	P_1·0·=0.301 1	P_0·10=0.215 0	P_0·11=0.064 6	P_1·00=0.096 8	P₀₁₁₀=0.129 0
P_…1=0.559 2	P_1··0=0.172 1	P_·10·=0.225 9	P_1·01=0.204 3	P_1·10=0.075 3	P_1·11=0.182 8	P₀₁₁₁=0.032 3
—	P_·1·0=0.236 6	P_··10=0.290 3	P_·000=0.064 5	P_·001=0.172 0	P_·010=0.139 8	P₁₀₀₀=0.064 5
—	P_11··=0.182 9	P_1·1·=0.258 1	P_·011=0.161 3	P_·100=0.086 1	P_·101=0.139 8	P₁₀₀₁=0.129 0
—	P_1··1=0.387 1	P_·11·=0.236 6	P_·110=0.150 5	P_·111=0.086 1	—	P₁₀₁₀=0.053 8
—	P_·1·1=0.225 9	P_··11=0.247 4	—	—	—	P₁₀₁₁=0.129 0
—	—	—	—	—	—	P₁₁₀₀=0.032 3
—	—	—	—	—	—	P₁₁₀₁=0.075 3
—	—	—	—	—	—	P₁₁₁₀=0.021 5
—	—	—	—	—	—	P₁₁₁₁=0.053 8

耦合类型	风险耦合值
双因素风险耦合	T₂₁=0.068 2	T₂₂=0.021 3	T₂₃=0.066 4	T₂₄=0.001 6	T₂₅=0.012 5	T₂₆=0.033 6
3因素风险耦合	T₃₁=0.099 5	T₃₂=0.139 2	T₃₃=0.147 4	T₃₄=0.051 1	—	—
4因素风险耦合	T₄=0.257 8	—	—	—	—	—