沟槽挖土方计算公式

1、求给出放坡系数的基础开挖土方计算公式？解：土方边坡用边坡坡度和坡度系数表示。工程中常用1：K表示放坡坡度。K称坡度系数。设：上宽为a，挖土深度为h,长度为L，放坡系数为k则：下宽b=a-hk那么，挖土方的计算公式是：V=(a+a-hk) / 2 x HL,沟 槽 挖 土 方 计 算 表,管径,上宽a=b+hk,下宽b=a-hk（查下表）,沟槽深 h （垫层+管径+覆土高度） 或 （按图纸设计要求）,放坡系数 K（查下表）,沟槽截面积S=(a+b)h2,管道长度 L （单位：米）,挖土体积 V （单位：m3）,回填土 （单位：m3）,管内体积 （单位：m3）,垫层体积 （单位：m3）DN50,1

2、.65,0.6,0.7,0.75,0.788 ,314.34,247.543 ,223.350 ,0.617 ,23.576 DN60,1.65,0.6,0.7,0.75,0.788 ,218.76,172.274 ,155.248 ,0.618 ,16.407 DN80,1.65,0.6,0.7,0.75,0.788 ,15.37,12.104 ,10.874 ,0.077 ,1.153 DN100,1.75,0.7,0.7,0.75,0.858 ,34.86,29.892 ,27.004 ,0.274 ,2.615 DN125,0,0.000 ,0.000 ,0.000 ,0.000 ,0

3、.000 DN150,1.8,0.75,0.7,0.75,0.893 ,0.000 ,0.000 ,0.000 ,0.000 DN200,2.2,1,0.8,0.75,1.280 ,977.19,1250.803 ,1167.435 ,0.307 ,83.061 DN250,2.275,1,0.85,0.75,1.392 ,1605.32,2234.405 ,2011.165 ,78.761 ,144.479 DN300,2.55,1.2,0.9,0.75,1.688 ,0.000 ,0.000 ,0.000 ,0.000 DN400,2.8,1.3,1,0.75,2.050 ,0.000 ,

4、0.000 ,0.000 ,0.000 DN500,3.05,1.4,1.1,0.75,2.448 ,0.000 ,0.000 ,0.000 ,0.000 DN600,3.3,1.5,1.2,0.75,2.880 ,0.000 ,0.000 ,0.000 ,0.000 DN700,3.75,1.8,1.3,0.75,3.608 ,0.000 ,0.000 ,0.000 ,0.000 DN800,4,1.9,1.4,0.75,4.130 ,0.000 ,0.000 ,0.000 ,0.000 DN900,4.25,2,1.5,0.75,4.688 ,0.000 ,0.000 ,0.000 ,0.

5、000 DN1000,4.6,2.2,1.6,0.75,5.440 ,0.000 ,0.000 ,0.000 ,0.000 DN1100,4.85,2.3,1.7,0.75,6.078 ,0.000 ,0.000 ,0.000 ,0.000 DN1200,5.1,2.4,1.8,0.75,6.750 ,0.000 ,0.000 ,0.000 ,0.000 注：红色字体已设有公式，在黑色字体的格输入实际数据即可。没有标注单位为“米”。沟槽基础垫层厚度：一般土质100，较差土质200。,放 坡 开 挖 沟 槽 底 面 宽 度 表（Hs:管材半强度）,公称直径,Hs3000,3000Hs4000,H

6、s4000,公称直径,Hs3000,3000Hs4000,Hs4000,DN150,650,DN700,1600,1700,1800,DN200,700,DN800,1700,1800,1900,DN300,1000,1100,1200,DN900,1800,1900,2000,DN400,1100,1300,1400,DN1000,2000,2100,2200,DN500,1300,1400,1500,DN1100,2100,2200,2300,DN600,1400,1500,1600,DN1200,2200,2300,2400,有 支 撑 沟 槽 底 面 宽 度 表（Hs:管材半强度）,公

7、称直径,Hs3000,3000Hs4000,Hs4000,公称直径,Hs3000,3000Hs4000,Hs4000,DN150,950,DN700,1900,2000,2100,DN200,1000,DN800,2000,2100,2200,DN300,1300,1400,1500,DN900,2100,2200,2300,DN400,1400,1600,1700,DN1000,2300,2400,2500,DN500,1600,1700,1800,DN1100,2400,2500,2600,DN600,1700,1800,1900,DN1200,2500,2600,2700,雨水口连接管沟

8、槽宽度表(),黄色表格摘自04S520图集埋地塑料排水管施工57页,管道规格,DN100,DN300,DN400,沟槽宽度,650,800,900,土方工程放坡系数表,绿色表格摘自网上,土壤类别,放坡起点（m）,人工挖土,机械挖土,在坑内作业,在坑上作业,一、二类土,1.2,1 : 0.50,1 : 0.33,1 : 0.75,三类土,1.5,1 : 0.33,1 : 0.25,1 : 0.67,四类土,2,1 : 0.25,1 : 0.10,1 : 0.33,室外排水管土方开挖底部宽度,管径（）,铸铁管、钢管、石棉水泥管,塑料管,混凝土、钢筋混凝土管、 预应力钢筋混凝土管,陶土管,5075,0.6 ,0.7 ,0.8 ,0.7 ,100200,0.7 ,0.8 ,0.9 ,0.8 ,250350,0.8 ,0.9 ,1.0 ,0.9 ,400450,1.0 ,1.1