問答題繪圖題:設(shè)計(jì)開挖斷面如圖E-7(a)所示,置儀器于斷面軸線上,儀器高為1.58m(距設(shè)計(jì)底板高),實(shí)測開挖斷面數(shù)據(jù)如下:(記錄格式:高差/平距)-1.28/-1.57,-0.99/-1.80,-0.67/-2.01,-0.38/-2.35,0.18/-2.76,0.82/-2.87,1.38/-3.03,1.98/-2.90,2.60/-2.66,3.30/-2.24,3.82/-1.72,4.02/-1.27,4.03/-0.83,4.14/-0.40,4.26/-0.22,4.26/0.66,4.00/1.36,3.77/1.80,3.47/2.10,3.03/2.29,2.56/2.52,2.17/2.88,1.68/2.98,1.21/2.99,0.67/2.83,0.13/2.59,-0.43/2.43,-0.81/2.11,-1.18/1.65,-1.50/1.03,-1.65/0.38,-1.65/0.05,-1.56/-0.63,-1.41/-1.08。按1∶200繪出實(shí)際開挖斷面。

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