真题演练

<p style=";line-height:150%"><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">计算图示挡土墙上</span><span style="font-family:Calibri">a</span><span style="font-family:宋体">、</span><span style="font-family:Calibri">b</span><span style="font-family:宋体">、</span><span style="font-family:Calibri">c</span><span style="font-family:宋体">三点朗肯土压力的分布及合力。已知：上层土：</span></span><span style=";font-family:&#39;Times New Roman&#39;;font-size:14px"><span style="font-family:Times New Roman">γ</span></span>_{<span style=";font-family:&#39;Times New Roman&#39;;font-size:14px;vertical-align:sub">1</span>}<span style=";font-family:&#39;Times New Roman&#39;;font-size:14px">=18kN/m3.φ</span>_{<span style=";font-family:&#39;Times New Roman&#39;;font-size:14px;vertical-align:sub">1</span>}<span style=";font-family:&#39;Times New Roman&#39;;font-size:14px">=30°<span style="font-family:宋体">，</span><span style="font-family:Times New Roman">c1=0</span><span style="font-family:宋体">，</span><span style="font-family:Times New Roman">h</span></span>_{<span style=";font-family:&#39;Times New Roman&#39;;font-size:14px;vertical-align:sub">1</span>}<span style=";font-family:&#39;Times New Roman&#39;;font-size:14px">=4m<span style="font-family:宋体">；下层土：</span><span style="font-family:Times New Roman">γ</span></span>_{<span style=";font-family:&#39;Times New Roman&#39;;font-size:14px;vertical-align:sub">2</span>}<span style=";font-family:&#39;Times New Roman&#39;;font-size:14px">=20kN/m3.φ</span>_{<span style=";font-family:&#39;Times New Roman&#39;;font-size:14px;vertical-align:sub">2</span>}<span style=";font-family:&#39;Times New Roman&#39;;font-size:14px">=20°<span style="font-family:宋体">，</span><span style="font-family:Times New Roman">c</span></span>_{<span style=";font-family:&#39;Times New Roman&#39;;font-size:14px;vertical-align:sub">2</span>}<span style=";font-family:&#39;Times New Roman&#39;;font-size:14px">=10kpa<span style="font-family:宋体">，</span><span style="font-family:Times New Roman">h</span></span>_{<span style=";font-family:&#39;Times New Roman&#39;;font-size:14px;vertical-align:sub">2</span>}<span style=";font-family:&#39;Times New Roman&#39;;font-size:14px">=5m<span style="font-family:宋体">。</span></span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">表面作用无限均布荷载</span><span style="font-family:Times New Roman">q=20</span></span><span style=";font-family:&#39;Times New Roman&#39;;font-size:14px">kpa</span><span style=";font-family:宋体;font-size:14px"><span style="font-family:宋体">。</span></span></p><p><img src="https://mooc-image.nosdn.127.net/9e9227aac9c543bbb33dac5103dfd6d4.png" class="eduEditor-img"/></p>