某滑坡需做支挡设计,根据勘察资料滑坡体分3个条块,如图、表所示,已知c=10kPa,φ=10°,滑坡推力安全系数取1.15,第三块滑体的下滑推力F3为()。
A. 39.9kN/m
B. 49.3kN/m
C. 79.2kN/m
D. 109.1kN/m
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某组原状样室内压力与膨胀率δep(%)的关系如表:按《膨胀土地区建筑技术规范》 (GBJ 112—87)计算,膨胀力Pc最接近()(可用作图或插入法近似求得)。
A. 90kPa
B. 98kPa
C. 110kPa
D. 120kPa
柱下独立基础底面尺寸为3m×5m,F1=300kN,F2=1500kN,M=900k.m, FH=200kN,如图所示,基础埋深d=1.5m,承台及填土平均重度γ=20kN/m3,计算基础底面偏心距最接近于()。
A. 23cm
B. 47cm
C. 55cm
D. 83cm
天然地基各土层厚度及参数如下表:采用深层搅拌桩复合地基加固,桩径d=0.6m,桩长l=15m,水泥土试块立方体抗压强度平均值fcu=2000kPa,桩身强度折减系数η=0.33,桩端土承载力折减系数为0.5,搅拌桩单桩承载力可取()。
A. 219kN
B. 203kN
C. 187kN
D. 180kN
The examples given in Para. 2 are used to illustrate that .
A. people's handwriting would have been better if there had been no computers
B. artists are those who like new technology for its own sake
C. technical improvements enable tennis players to defeat their opponents using clever plans
D. people rely too much on modern technology