稳定土组成设计

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,无机结合料稳定材料组成设计,河南交通职业技术学院,道桥工程系 曹学禹,设 计 步 骤,1,、确定稳定土的,类型,：石灰稳定类、水泥稳定类、综合稳定类,2,、选定材料及用量比列：,参考已建类似工程,或规范,JTJ 034-2000,公路路面基层施工技术规范,3,、原材料试验：土的液塑限，石料的压碎值、级配，水泥试验，石灰的化学分析，混合料的击实等。,4,、制备无侧限抗压强度试件：,（,1,）已知条件：,最大干密度,0,和最佳含水量,W,压实度,K,和混合料,7,天无侧限抗压强度,R,d,（,2,）试件数量：,（,3,）选择试模尺寸：,稳定土类型,偏 差 系 数,10%,10%,15%,15%,20%,细粒土,6,9,中粒土,6,9,13,粗粒土,9,13,最少试件数量,细粒土,50mm,50mm,中粒土,100mm,100mm,粗粒土,150mm,150mm,（,3,）计算制备一个试件所需各种材料用量：,制备一个试件需要的混合料的质量为：,m,一个试件需要的混合料的质量,o,混合料试件的最大干密度,K,施工要求的压实度,V,试模的体积,W,混合料试件的最佳含水率,（,4,）制备试件、养生,7,天、测强度。,小试件：,中试件：,大试件：,（,5,）选择满足强度要求的最小灰剂量：,附：偏差系数的计算,工程实例：某新建二级公路，选用石灰土作为底基层，设计石灰剂量。,1,、组成材料：石灰为,3,级钙质生石灰,土为粘性土，塑性指数,I,P,=11.31,。,2,、设计要求：设计强度,R,d,=0.7MPa,压实度,K=93%,3,、设计计算,（,1,）确定石灰剂量范围,由粘性土塑性指数,IP=11.31,，根据教材,192,页表,6-19,，选定石灰剂量范围,8%,，,10%,，,11%,，,12%,，,14%,。,（,2,）确定石灰土的最佳含水量和最大干密度。,（,3,）按所求得的最佳含水量、最大干密度制备满足施工压实度的石灰剂量分别为,8%,、,10%,、,11%,、,12%,、,14%,的试件。,试件数量：每组,6,个。,试模尺寸：,50mm50mm,圆柱体，体积,V=98.17 cm,3,石灰剂量（,%,）,8,10,11,12,14,最佳含水量（,%,）,10.91,11.38,11.84,12.56,13.35,最大干密度（,g/cm,3,）,1.839,1.850,1.854,1.848,1.836,（,4,）制备一个试件所需各种材料用量如下：,试模尺寸,(cm),5,体积,(cm3),98.17,压实度,(%),93,灰剂量（,%,）,8,10,11,12,14,最佳含水量,10.91,11.38,11.84,12.56,13.35,最大干密度,1.839,1.850,1.854,1.848,1.836,石灰,/,水泥,12.44,15.36,16.77,18.08,20.59,土,155.47,153.55,152.50,150.65,147.05,水,18.32,19.22,20.04,21.19,22.38,混合料质量,186.22,188.13,189.32,189.92,190.01,（,5,）根据无侧限抗压强度结果，选择满足强度要求的最小石灰剂量,不同石灰剂量的抗压强度,石灰剂量（,%,）,试件编号,8,10,11,12,14,1,0.616,0.642,0.690,0.764,0.790,2,0.588,0.652,0.716,0.759,0.772,3,0.632,0.690,0.728,0.755,0.766,4,0.626,0.672,0.714,0.786,0.748,5,0.590,0.664,0.708,0.747,0.757,6,0.568,0.624,0.696,0.732,0.784,平均值,0.603,0.657,0.709,0.757,0.770,标准差,S,0.025,0.023,0.014,0.018,0.016,偏差系数,Cv,0.042,0.035,0.020,0.024,0.021,Rd/(1-ZaCv),0.739,0.733,0.718,0.722,0.719,设计强度,0.7,Za,1.282,石灰摊铺厚度的计算方法,例：灰剂量为,12%,的石灰土结构层，结构层宽度,6m,，压实厚度,15cm,。经试验：石灰土最大干密度,1848kg/cm,3,，消石灰天然松方湿密度为,495kg/cm,3,，土的天然松方湿密度为,1192kg/cm,3,。实测消石灰含水量,28%,，土的含水量,4%,。,计算方法：依据密度公式,=,m/v,、含水量公式,w=m,水,/m,干土,和长方体体积公式,V=,a,b,h,。每延米用量计算如下：,石灰土的干燥质量：,m,石灰土,=1848160.15=1663 kg,河南省高等级公路路面结构汇总表,序号,路面结构,道路名称,上面层,中面层,下面层,基层,底基层,厚度,材料名称,厚度,材料名称,厚度,材料名称,厚度,材料名称,厚度,材料名称,高速公路,1,安阳至新乡,4,SAC,5,AC-25I,7,AS,20,CCR,35,LS,2,许昌至漯河,4,AC-16I,5,AC-25I,7,AC-30I,20,CCR,40,CLS,3,新乡至郑州,4,AC-16I,5,AC-20I,7,AC-25I,38,CCR,18,CLS,4,漯河至驻马店,4,AK-16A,5,AC-20I,7,AC-25I,38,CCR,20,CLS,5,驻马店至信阳,4,AK-16A,5,AC-20I,7,AC-25I,34,CCR,20,CLSS,6,郑州至洛阳,4,AC-16I,5,AC-25I,7,AS,15,LFCR,36,LFS,7,洛阳至三门峡,4,AC-16I,5,AC-20I,7,AC-25I,34,CCR,20,CLS,8,商丘至开封,4,AK-16A,5,AC-20I,7,AC-25I,34,CCR,20,CLS,9,三门峡至灵宝,4,AC-16I,5,AC-20I,7,AC-25I,34,CCR,20,CLS,省级干线一级公路,10,漯河至周口,4,AK-16A,5,AC-20I,6,AC-25I,20,CCR,32,CLS,11,濮阳至鹤壁,4,AK-16A,5,AC-20I,6,AC-25I,20,CCR,30,CLS,12,周口至省界,4,AK-16A,5,AC-20I,6,AC-25I,20,CCR,30,LS,说明,注：,1,、,AC-16,AC-20,中粒式沥青混凝土。,2,、,AC-25,AC-30,粗粒式沥青混凝土。,3,、,AS,热拌式沥碎石。,4,、,LFCR,二灰稳定碎石。,5,、,CCR,水泥稳定碎石。,6,、,CLCR,水泥稳定碎石。,7,、,CLS,水泥、石灰稳定土。,8,、,LS,石灰稳定土。,9,、,CLSS,水泥、石灰土稳定砂。,10,、,AK,抗滑面层。,11,、,SAC,多碎石,返回,河南省典型基层材料设计参数推荐取值,半刚性基层设计参数推荐,基层材料名称,配合比,二灰稳定碎石,5,：,15,：,80,二灰稳定砂砾,10,：,20,：,70,水泥稳定碎石,6,：,94,水泥稳定砂砾,5,：,95,返回,