有一个条形均布荷载P =100kPa ,宽度为3m ,埋深1.5m ,基础底面以上土的性质为︒=15ϕ,C=15kPa ,r =17kN/m 3,基础底面以下土的性质为︒=10ϕ,C =20 kPa ,r =18kN/m 3,试问该基础的安全度为多少?(︒=10ϕ时Nr =1.20,Nq =2.69,Nc =9.58;︒=15ϕ Nr =1.80,Nq =4.45.Nc =12.9)( )
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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