,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,(,*,),单击此处编辑母版标题样式,*,上海市城市建设工程学校,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,单击此处编辑母版标题样式,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,(,1,),2024/11/17,如图所示为一条附合导线,,A,、,B,、,C,、,D,为场地已知控制点,,1,2,3,A,B,C,D,4,AB,CD,AB,=,431712,CD=41600,X,B,=1230.88m,Y,B,=673.45m,X,C,=1845.69m,Y,C,=1039.98m,试用导线测量方法测定导线点,1,、,2,、,3,、,4,的坐标。,(1)2023/10/7 如图所示为一条附合导线,A、B,(,2,),2024/11/17,A,B,1,2,3,C,D,4,B,2,3,4,C,AB,CD,1,180,13,36,178,22,30,193,44,00,181,13,00,204,54,30,180,32,48,124.08,164.10,208.53,94.18,147.44,X,B,=1230.88,Y,B,=673.45,X,C,=1845.69,Y,C,=1039.98,43,17,12,4,16,00,返回表格,外业观测数据,(2)2023/10/7AB123CD4B234C,(,3,),2024/11/17,二、方法与步骤,1,、填写外业观测数据与已知数据,2,、角度闭合差的计算与调整,3,、推算各边坐标方位角,4,、坐标增量的计算与闭合差调整,5,、计算各导线点的坐标,(3)2023/10/7二、方法与步骤1、填写外业观测数据与,点,号,转折角,(,右,),改正后,转折角,距离,(m),增量计算值,(m),改正后增量,(m),x,y,x,y,x,y,辅助计算,附合导线坐标计算表,角度闭合差计算与调整,方位角,坐标增量闭合差计算与调整,坐标值,(m),A,B,1,2,3,4,C,D,180 13 36,178 22 30,193 44 00,181 13 00,204 54 30,180 32 48,+8,+8,+8,+8,+8,+8,180 13 44,178 22 38,193 44 08,181 13 08,204 54 38,180 32 56,43 17 12,4 16 00,43 03 28,44 40 50,30 56 42,29 43 34,4 48 56,124.08,164.10,208.53,94.18,147.44,+90.66,+116.68,+178.85,+81.79,+146.92,+84.71,+115.39,+46.70,+107.23,+12.38,-2,-2,-2,-1,-2,+2,+3,+3,+2,+2,+90.64,+116.66,+178.83,+81.78,+146.90,+84.73,+115.42,+107.26,+46.72,+12.40,1230.88,1845.69,1321.52,1438.18,1617.01,1698.79,673.45,1039.98,758.18,873.60,980.86,1027.58,1119 01 12,738.33,+,614.90,+,366.41,1119 00 24,+,614.81,+,366.53,+614.81,+366.53,f,x,=,x,测,-,(,x,C,-,x,B,),=614.90-614.81,f,y,=,y,测,-,(,y,C,-,y,B,),=366.41-366.53,K,=,=360,,则应减去,360,若算得,前,0,,则应加上,360,本例为右角,所以:,=43,17,12,-180,13,44,+180,=43,03,28,右角,:,前,=,后,-,右,+180,B1,=,AB,-,B,改,+180,返回表格,(9)2023/10/73、推算各边坐标方位角 左角:,(,10,),2024/11/17,检验:算到终边已知方位角,=43,03,28,-178,22,38,+180,=44,40,50,12,=,B1,-,1,改,+180,=44,40,50,-193,44,08,+180,=30,56,42,23,=,12,-,2,改,+180,=30,56,42,-181,13,08,+180,=29,43,34,34,=,23,-,3,改,+180,=29,43,34,-204,54,38,+180,=4,48,56,4C,=,34,-,4,改,+180,=4,48,56,-180,32,56,+180,=4,16,00,CD,=,4C,-,C,改,+180,返回表格,(10)2023/10/7检验:算到终边已知方位角=430,(,11,),2024/11/17,计算各边,坐标增量值,:,以此类推计算出各导线边的坐标,增量,X=D,cos,Y=D,sin,x,B1,=D,B1,cos,B1,=,y,B1,=D,B1,sin,B1,=,124.08cos,430328,124.08sin,430328,x,12,=D,12,cos,12,=,y,12,=D,12,sin,12,=,164.10 cos,444050,164.10 sin,444050,.,4,、坐标增量的计算与闭合差调整,=+90.66m,=+84.71m,=+116.68m,=+115.39m,返回表格,(11)2023/10/7计算各边坐标增量值:以此类推计算出,(,12,),2024/11/17,坐标增量闭合差:,f,x,=,x,测,-,x,理,f,y,=,y,测,-,y,理,导线精度:,K,容,=1/2000,KK,容,精度符合,可以平差,导线全长闭合差:,1),计算坐标增量闭合差,x,理,=,x,终,-,x,始,y,理,=,y,终,-,y,始,返回表格,(12)2023/10/7坐标增量闭合差:fx=x测-,(,13,),2024/11/17,分别将,f,x,,,f,y,反符号,按导线长度成正比例分配,-,f,x,-,f,y,每米改正数,=,D,D,-f,x,纵,坐标增量改正值,Vx,i,i+1,=,D,i,i+1,D,-f,y,横,坐标增量改正值,Vy,i,i+1,=,D,i,i+1,D,检核,:,Vx,i,i+1,=-f,x,Vy,i,i+1,=-f,y,2),计算坐标增量改正数(平差),(13)2023/10/7分别将fx,fy反符号,按导线长,(,14,),2024/11/17,在本例中,导线边,B1,的坐标增量改正数为,导线边,12,的坐标增量改正数为,(14)2023/10/7在本例中,导线边B1的坐标增量改正,(,15,),2024/11/17,导线边,23,的坐标增量改正数为,导线边,34,的坐标增量改正数为,(15)2023/10/7导线边23的坐标增量改正数为 导线,(,16,),2024/11/17,导线边,4C,的坐标增量改正数为,Vx=(-0.02)+(-0.02)+(-0.02)+(-0.01)+(-0.02)=-0.09m,检核:,Vy=(+0.02)+(+0.03)+(+0.03)+(+0.02)+(+0.02)=+0.12m,注意:如果,V,x,-,f,x,(或,V,y,-,f,y,),应再次调整坐标增量改正数。,返回表格,(16)2023/10/7导线边4C的坐标增量改正数为 V,(,17,),2024/11/17,x,改,=,x,计算,+,改正值,V,x,y,改,=,y,计算,+,改正值,V,y,检核:,X,改,=,X,理,Y,改,=,Y,理,3,)计算改正后坐标增量,返回表格,(17)2023/10/7 x改=x计算+改正值Vx,(,18,),2024/11/17,X,前,=X,后,+X,改,Y,前,=Y,后,+Y,改,检核:算回到已知点,C,。,5,、计算各导线点坐标,返回表格,(18)2023/10/7X前=X后+X改检核:算回到已知,