新型固砂剂试验效果分析及边坡防护施工工艺研究  

Analysis on Experiment Effect of New-type Sand Consolidating Agent and Research on Construction Technique of Slope Protection

作　　者：牛笑笛 杨广庆[1] 蒲昌瑜[2] 刘彦航[1] NIU Xiaodi YANG Guangqing PU Changyu LIU Yanhang(School of Civil Engineering, Shijiazhuang Tiedao University, Hebei Shijiazhuang 050043, China Hebei Provincial Communications Planning and Design Institute, Shijiazhuang Hebei 050011, China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]河北省交通规划设计院,河北石家庄050011

出　　处：《铁道建筑》2017年第2期86-90,共5页Railway Engineering

摘　　要：针对砂质边坡稳定性差且直接在其坡面上进行生态防护效果不良的现状,研制了一种以钾水玻璃和磷酸硅为主要添加剂的生态防护型固砂剂。为了研究固砂效果,进行了固砂试样的无侧限抗压强度试验研究。试验结果表明:在一定的钾水玻璃掺入量条件下,固砂试样的无侧限抗压强度随钾水玻璃模数的增加而增大,且基本呈线性关系,强度的增长速率随龄期的增加而逐渐降低;固砂试样具有较好的耐水性,饱水3 d后试样强度基本趋于稳定。将新型固砂剂应用于张承高速公路砂质边坡试验段,并提出现场施工工艺方案,经过2年观测,砂质边坡固化效果良好。In order to solve the problems of poor stability of sandy slopes and poor ecological protection directly on the slope,an ecological-protection-type sand consolidating agent with potassium water glass and silicon phosphate as the main additives was developed.In order to study the effect of sand consolidating agent,the unconfined compressive strength of sand samples was studied.The results show that the unconfined compressive strength increases with the increase of modulus of potassium water glass under the condition of certain admixing amount of potassium water glass,basically presenting linear correlation,and the growth rate of the strength decreases along with the increase of ages.The sand samples have good water resistance and the strength of the sand samples after 3 days of water saturation is basically stable.The new-type sand consolidating agent was applied to the sandy slope of Zhangjiakou-Chengde highway,and the site construction technique scheme was put forward.After 2 years observation,the solidification effect of sandy slope is good.

关 键 词：公路路基 边坡加固 试验研究 固砂剂 施工工艺 

分 类 号：U416.14[交通运输工程—道路与铁道工程]