1 / 12

حساب المساحات Area Computation

حساب المساحات Area Computation. حساب مساحات المقاطع العرضية Cross – Section. - The cross-section is perpendicular on longitudinal - We can find the cross – section by leveling cross – section at following :- * Compute the point behind center line

bfagan
Télécharger la présentation

حساب المساحات Area Computation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. حساب المساحات Area Computation حساب مساحات المقاطع العرضيةCross – Section - The cross-section is perpendicular on longitudinal - We can find the cross – section by leveling cross – section at following :- * Compute the point behind center line * Draw the cross – section to every station at ( 100 m)

  2. حساب المساحات Area Computation حساب مساحات المقاطع العرضيةCross – Section Type of cross - section Cut -Section A C Side - Hill-Section C C Ground line Ground line 1:s 1:s 1:s Grad line Grad line B Fill-Section 1:s C Grad line 1:s 1:s Ground line

  3. حساب المساحات Area Computation حساب مساحات المقاطع العرضيةCross – Section Side Slope ( 1:S ) ( ) 1 الانحدار الجانبي S C ΔX ΔX B C 6 D 6 31.5 Δ1 Δ2 1 1 ΔY ΔY G 4 29.2 4 26.4 Dis. = 20m Dis. = ? F A Elev. F = ?

  4. At Δ1 At Δ2 = = = = Elev. Of f = elev. Of C - Dis. = 20.4 +6 = 26.4 m = 31.5 -3.5 = 28 m

  5. حساب المساحات Area Computation حساب مساحات المقاطع العرضيةCross – Section area 1- By Arithmetic Means الطريقة الحسابية Fora Level - section A نلاحظ أن الشكل هو شبه منحرف b حساب مساحة مقطع مستو ( منسوب واحد لسطح الأرض) b + ( b + 2 s . d ) × d A = 1 1 2 d s s 2b + 2 s . d ) × d A = 2 Δx b Δx s.d A= d ( b + s.d ) d = ground elev. - grad elev. = = s.d

  6. حساب المساحات Area Computation حساب مساحات المقاطع العرضيةCross – Section area مساحة المثلثين في الأعلى B Fora Three -Level section (b/2 × dL)/2 + (b/2 × dR)/2 حساب مساحة مقطع ذي ثلاث مستويات ( ثلاثة مناسيب لسطح الأرض) b/2 (dL× dR)/2 C b/2 b/2 مساحة المثلثين في الأسفل dR (d × XL)/2 + (d × XR)/2 dL d d (XL× XR)/2 A=[b/2 (dL×dR)/2]+ [d (XL×XR)/2] XR 1 XL A= [b/2 (dL×dR)]+ [d (XL×XR)] 2

  7. حساب المساحات Area Computation حساب مساحات المقاطع العرضيةCross – Section area B Fora Multi-Level section يستخدم قانون الإحداثيات الذي سبق ذكره لحساب مساحة المقطع العرضي المتعدد المستويات C =Y-axis X1 P7(X7,Y7) P1(X1,Y1) P3(X3,Y3) P5(X5,Y5) X5 P4(X4,Y4) Y1 P6(X6,Y6) Y5 P2(X2,Y2) X-axis مستوى سطح البحر

  8. حساب المساحات Area Computation حساب مساحات المقاطع العرضيةCross – Section area Known Ground Surface One -Slop A C 1:n Ground line 1 s h 1 s b/2 b/2 Grad line s= الميل الجانبي b= عرض خط الإنشاء h= الارتفاع n= ميل الأرض

  9. حساب المساحات Area Computation حساب مساحات المقاطع العرضيةCross – Section area Known Ground Surface w2 Tow -Slop B w1 C 1:n1 1:n2 Ground line 1 h2 s h 1 h1 s b/2 b/2 Grad line

  10. EX1 :- Compute the area of the Fora Level - section if you know the following data :- 1- Elevation of grade line = 32 m 2- Elevation of ground line = 30 m 3- Side slop = 1: 3 4- Road width = 10 m d = 30 -32 = -2 b=10 C إذن المقطع هو مقطع ردم وعمق الردم 2m = 32 A = d ( b + S.d ) 1 d 3 A = 2( 10 + 3×2 ) = 32 m² 30

  11. EX2 :- Compute the area of the Fora three Level - section if you know the following data :- 1- Center Depth ( d ) = 4 m 2- Right Depth ( dR ) = 6 m 3- Left Depth ( dL ) = 10 m 4- Road width = 12 m 5- Right Dis. ( XR ) = -18 m 6- Left Dis. ( XL ) = 26 m A = 0.5 [b/2 ( dR + dL ) + d(XR + XL ) ] A = 0.5 [12/2 ( 6 + 10 ) + 4 ( 18 + 26 )] = 136 m²

  12. حساب المساحات Area Computation Home Work C =Y-axis From the data in fig. below Compute the area of the Fora Multi Level - section if you know all dimension in meters . P7 5 5 p1 24 p5 2 p3 6 22 21 19 P4 20 21 17 33 p6 p2 X-axis مستوى سطح البحر

More Related