施工控制網(wǎng) - 閉合導(dǎo)線計02課件講解

施工控制網(wǎng)-閉合導(dǎo)線計算閉合導(dǎo)線平差計算步驟繪制計算草圖，在圖上填寫已知數(shù)據(jù)和觀測數(shù)據(jù)。1角度閉合差（angleclosingerror）的計算與調(diào)整。2（1）計算角度閉合差

=

測-

理

=

測-(n-2)

180

（2）計算限差115.10100.09108.3294.3867.85A1234XA=536.27mYA=328.74m

A148

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4112

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閉合導(dǎo)線平差計算步驟（3）若在限差內(nèi)，則平均分配原則，計算改正數(shù)：（4）計算改正后新的角值115.10100.09108.3294.3867.85A1234XA=536.27mYA=328.74m

A148

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4112

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閉合導(dǎo)線平差計算步驟按新的角值，推算各邊坐標方位角。3按坐標正算公式，計算各邊坐標增量。4坐標增量閉合差(closingerrorincoordinationincrement)計算與調(diào)整。5115.10100.09108.3294.3867.85A1234XA=536.27mYA=328.74m

A148

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4112

22

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97

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閉合導(dǎo)線平差計算步驟（1）計算坐標增量閉合差導(dǎo)線全長閉合差導(dǎo)線全長相對閉合差(relativelengthclosingerroroftraverse):115.10100.09108.3294.3867.85A1234XA=536.27mYA=328.74m

A148

43

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1

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4112

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閉合導(dǎo)線平差計算步驟（2）分配坐標增量閉合差115.10100.09108.3294.3867.85A1234XA=536.27mYA=328.74m

A148

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4112

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若K<1/2000（圖根級），則將fx、fy以相反符號，按邊長成正比分配到各坐標增量上去。并計算改正后的坐標增量。閉合導(dǎo)線平差計算步驟115.10100.09108.3294.3867.85A1234XA=536.27mYA=328.74m

A148

43

18

A

1

2

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4112

22

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97

03

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105

17

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101

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閉合導(dǎo)線平差計算步驟坐標計算：根據(jù)起始點的已知坐標和經(jīng)改正的新的坐標增量來依次計算各導(dǎo)線點的坐標。6115.10100.09108.3294.3867.85A1234XA=536.27mYA=328.74m

A148

43

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A

1

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4112

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K=

=<

D1400012000點號轉(zhuǎn)折角(右)

改正后

轉(zhuǎn)折角

方向角

邊長D(米)坐標

增量(米)

X

Y改正后增量(米)

X

Y坐標(米)XY點號A1234A19703001051706101462412330061122224+12+12+12+12+12484318

1314006206224828436123410554484318485.47

+0.09

-0.08

x=+0.09

y=

0.08

=

x

+

y=0.120225395900

理=540

00

00

=

測

理=

60

容=

40

5=

89

54000009703121051718101463612330181122236115.10100.09108.3294.3867.58+75.93-66.54-97.04+23.80+63.94+86.50+74.77-48.13-91.33-21.89-2-2-2-2-1+2+2+2+1+1612.18545.62448.56472.34415.26490.05441.94350.621234A536.27536.27328.74