施工组织设计计算例题

3.2.1.场地平整土方量的计算

本工程地形图如图3.2.1所示。

图3.2.1地形图

根据地形图的等高线采用内插法确定各方格角点的自然底面标高，如图3.2.2所示。

采用“挖填土方量平衡法”确定场地的设计标高，计算场地平整的土方量。 （1）初步确定场地平整的设计标高

n

Z Z Z Z Z 44324

3210∑∑∑∑+++=

m Z 01.90141.22632.22557.22371.2251=+++=∑

m

26.901182.22594.22509.22624.22621.22606.22690.22577.22559.22542.22508.22567.22421

.22486.22396.22343.22473.22498.22422.22545.2252Z 22=+++++++++++++++++++⨯=∑）（

m

84.2161995.22578.22561.22543.22527.22515.22581.22697.22417.22537.22559.22582.22568.22545.22520.22597.22471

.22447.22417.22457.22483.22409.22533.22557.2254Z 42=+++++++++++++++++++++++⨯=∑）（

m Z 43.22535

484

.2161926.901101.9010=⨯++=

图3.2.2各方格角点的自然地面标高

（2）最终确定场地内各方格角点的设计标高

m Z 54.225%2.050%3.07043.2251=⨯-⨯+='

同理可得'2Z =225.48 '3Z =225.42 '4Z =225.36 '5Z =225.30 '6Z =225.24 '7Z =225.18 '8Z =225.12 '9Z =225.50 '10Z =225.44 '11Z =225.38 '12Z =225.32 '

13Z =225.26 '14Z =225.20 '15Z =225.14 '16Z =225.08 '17Z =225.46 '18Z =225.40 '19Z =225.34 '20Z =225.28 '21Z =225.22'22Z =225.16 '23Z =225.10 '24Z =225.04 '

25Z =225.42 '26Z =225.36'27Z =225.30 '28Z =225.24 '29Z =225.18 '30Z =225.12 '31Z =225.06 '32Z =225.50'33Z =225.38 '34Z =225.32 '35Z =225.26 '36Z =225.20 '37Z =225.14 '38Z =225.08 '39Z =225.02 '40Z =224.96 '41Z =225.34 '42Z =225.28 '43Z =225.22 '

44Z =225.16 '45Z =225.10 '46Z =225.04 '47Z =224.98 '48Z =224.92 各方格角点的设计标高如图3.2.3所示。 （3）计算各角点的施工高度，标出场地零线

i i i Z Z H -'= m H 17.0-71.22554.2251=-=

同理可求出其他方格角点的施工高度，并用图解法确定零线，如图3.3.3所示。

y

y x x i i l i l z z ±±='0

225.54225.45225.48225.22225.42224.98225.36224.73225.30224.43225.24223.96225.18223.57225.71225.82225.50225.57225.44225.33225.38225.09225.32224.83225.26224.57225.20224.17225.14223.86225.08

225.12

225.94226.09226.24226.41225.46225.68225.40225.45225.34225.20225.28224.97225.22224.71225.16224.47225.10224.21225.04

225.42225.82225.36225.59225.30225.37225.24225.17225.18224.97225.12224.81225.06224.67225.00

225.38225.95225.32225.78225.26225.61225.20225.43225.14225.27225.08225.15225.02225.08224.96

225.34226.21225.28226.06225.22225.90225.16225.77225.10225.59225.04225.42224.98225.32224.92

1--1

-0.17

+0.03

+0.2

+0.38

+0.57

+0.81

+1.22

+1.55

-0.32-0.48-0.67-0.86-1.07

-0.13+0.05+0.23+0.43+0.63+0.97+1.22-0.28-0.46-0.63-0.93

-0.11-0.29-0.52-0.84

+0.08-0.13-0.41-0.74

+0.25+0.01-0.29-0.67

+0.45-0.17-0.19-0.55

+0.63+0.25-0.13-0.44

+0.83+0.33-0.12-0.4

2--1

3--1

4--1

5--1

1--2

2--2

3--2

4--2

5--2

1--3

2--3

3--3

4--3

5--3

1--4

2--4

3--4

4--4

5--4

1--5

2--5

3--5

4--5

5--5

1--6

2--6

3--6

4--6

5--6

1--7

2--7

3--7

4--7

5--7

1

9172533412101826344231119273543412202836445

1321293745614223038467

152********

162432140482‰

3‰

（4）计算各方格的土方量

1-3、1-4、1-5、1-6、1-7、2-4、2-5、2-6、2-7、3-5、3-6、3-7为全填方格（+）

()

43212

4H H H H a V +++= 3

2

3

18623.005.038.02.0420m V =+++=-）（ 3

2

4

116143.023.057.038.0420m V =+++=-）（ 3

2

5

124481.063.043.057.0420m V =+++=-）（ 3

2

6

136397.022.163.081.0420m V =+++=-）（ 3

27

149622.155.197.022.1420m V =+++=-）（

图3.2.3各方格角点的施工高度及零线