基坑降水引起的相鄰建筑物直接經(jīng)濟(jì)損失預(yù)測(cè)研究english-文庫(kù)吧資料
2024-09-05 09:30本頁(yè)面
【正文】 he geometric center of pit is set as the center of all donuts The affecting scope (taken as 5Sw, Swthe depth of water table falling beneath the pit ground ) is divided into a series of donuts with the increment as 36 ground settlement gradient 11iiiiiSSGDD????? No. G1 G2 G3 G4 G5 G6 G7 G8 Gi . No. G9 G10 G11 G12 G13 G14 G15 G16 Gi No. G17 G18 G19 G20 G21 G22 G23 G24 Gi 37 Ground settlement gradient in the Case Project 38 Generally, the further the distance from the pit edge is, the smaller the ground settlement gradient is. 39 However, if a donut runs across over the soil surface which is below and above the water table before and after pumping, the gradient here is likely to leap significantly. 40 For the sake of security, 1‰ is taken as the threshold of ground settlement gradient. The threshold of difference settlement building 41 The relationship between ground settlement gradient (G) and economic loss rate (λ) of building 1 When G is smaller than 1 ‰ , λ = 0. 2 Theoretically, when G approaches ∞, λ = 1. 3 Several historical cases are employed to set the relationship between G and λ , such as 0 .0 1 7 0 .1 50 .0 4 5 0 .8 00 .0 5 6 0 .9 5GGG??????????? ???，，(Above parameters are all from reference) Then, the form of the Equation is determined as 1xyc a b e ??? ? 42 The Powell Optimize Method is used to obtain the parameters, then a= b= c= 1001 0 . 0 3 1 80 . 9 6 9 2 3 0 . 4 8 6 2 xye ???? 43 The formula is derived from masonry structures around construction pit Building Direct loss Prediction The direct loss of damaged building caused by ground water pumping may be obtained as HCV?? Vcurrent value of building, and V N ?=V V VN _rebuild cost of building V’ _depreciation of building 44 5 Practical Applicatio
規(guī)章制度相關(guān)推薦
鄂ICP備17016276號(hào)-1