挡土墙高7m,墙背直立、光滑,墙后填土面水平,填土面上有均布荷载q=20kPa,填土情况见附图。试计算主动土压力合力的大小和作用点及作出墙背主动土压力分布图。
参考答案:
阅读理解。
1. Ashburton Library is open at _____ on Thursday.
A.10:00 a.m.
B. 11:00 a.m.
C. 3:45 p.m.
D. 4:30 p.m.
2. Parents can take their _____ children to the Kew Library.
A. two-year-old
B. five-year-old
C. eight-year-old
D. thirteen-year-old
3. The address of Balwyn Library is _____.
A. Cnr. Charles Street
B. Cnr. Cotham Road
C. 154 High Street
D. 336 Whitehorse Road
某施工单位承接一住宅小区给水排水工程,给水干管采用衬塑钢管沟槽连接,给水支管采用PPR管道热熔连接,阀门DN50以上采用蝶阀,DN50以下采用铜截止阀;排水管道排出管采用承插排水铸铁管,立管采用螺旋消音UPVC管,横支管采用普通UPVC管;雨水管道采用内排雨水,管道材质为镀锌钢管;采暖为市政直接供暖,管道采用焊接钢管,暖气片选用四柱型。
采暖立管垂直度允许偏差为每1米()
A.1mm
B.2mm
C.3mm
D.0.5mm