一般井巷断面掘进及支护工程量计算公式教学文案

1、Good is good, but better carries it.精益求精，善益求善。一般井巷断面掘进及支护工程量计算公式-一般井巷断面掘进及支护工程量计算公式断面类型支护方式净断面掘进断面每米支护体积每米粉刷面积附图拱墙及基础圆形断面砖、石、混凝土D2/4(D+2T)2/4(D+T)T图1梯形断面木支架、钢筋混凝土支架、金属支架h3(b1+b2)/2h4(b3+b4)/2(VL2+VL4+VL5)(n+1)(L4+L5+L2)(n+1)图2底拱砖、石、混凝土0.12B2B(0.12B+1.08a01)1.08Ba01半圆拱形断面（h0=B/2）砖、石、混凝土d=T砖、石、混凝土dTB(

2、0.39B+h2)B(0.39B+h2)B1(0.39B1+h2)B10.39(B+2d)+h21.57(B+T)T0.79(B1d+BT)2h2T+(k1+k2)T2h2T+(k1+k2)T1.57B+2h21.57B+2h2图3圆弧形断面（h0=B/3）砖、石、混凝土d=T砖、石、混凝土dTB(0.24B+h2)B(0.24B+h2)B1(0.39B1-0.15B+h2)0.24B2+0.64B+0.39(T+d)(T+d)+B1h2(1.27B+1.57d)d1.27B+0.79(T+d)(T+d)/22h2T+(k1+k2)T2h2T+(k1+k2)T1.27B+2h21.27B+2h

3、2图4三心拱形断面（h0=B/3）砖、石、混凝土d=T砖、石、混凝土dTB(0.26B+h2)B(0.26B+h2)B1(0.26B1+0.3T+h2)B10.26(B+3d)+h2(1.33B+1.55d)d0.26(3B1d+2BT)2h2T+(k1+k2)T2h2T+(k1+k2)T1.33B+2h21.33B+2h2图5三心拱形断面（h0=B/4）砖、石、混凝土d=T砖、石、混凝土dTB(0.2B+h2)B(0.2B+h2)B1(0.2B1+0.4d+h2)B10.2(B+4d)+h2(1.22B+1.58d)d0.2(4B1d+2BT)2h2T+(k1+k2)T2h2T+(k1+k2

4、)T1.22B+2h21.22B+2h2图5平顶断面钢梁混凝土Bh2B1(h2+T1)B1T12h2T+(k1+k2)TB+2h2图6半圆拱形断面（h0=B/2）喷射混凝土B(0.39B+h2)B1(0.39B1+h2)1.57(B+T)T2(h2+0.1)T1.57B+2h2圆弧形断面（h0=B/3）喷射混凝土B(0.24B+h2)B1(0.39B1-0.15B+h2)(1.27B+1.57d)d2(h2+0.1)T1.27B+2h2三心拱形断面（h0=B/3）喷射混凝土B(0.26B+h2)B1(0.26B1+0.3d+h2)(1.33B+1.55d)d2(h2+0.1)T1.33B+2h2三心拱形断面（h0=B/4）喷射混凝土B(0.2B+h2)B1(0.2B1+0.4d+h2)(1.22B+1.58d)d2(h2+0.1)T1.22B+2h2式中符号：h0净断面高d拱顶支护厚度T墙壁支护厚度B巷道净宽B1巷道掘进宽度h1自巷道道渣面算起的巷道墙高h2自巷道道渣面算起的巷道墙高k1位于水沟则基础深度k1无水沟则基础深度a01底拱厚度b1巷道净上宽b2巷道净下宽b3巷道掘进上宽b4巷道掘进下宽h1巷道净高h2巷道掘进高度L1两框架间立柱长度L2支架横梁长度L3支架腿柱长度L4L5分别代表两腿（或相等）长度