湿喷钢纤维混凝土在寒区边坡工程的应用  

Wet-process steel-fibre shotcrete use in slope support in cold area

作　　者：丁琳[1,2] 王丹[1] 王红梅[1] 温和哲 

机构地区：[1]黑龙江大学建筑工程学院,哈尔滨150080 [2]东北林业大学工程技术学院,哈尔滨150040 [3]黑龙江省交通科学研究所,哈尔滨150080

出　　处：《黑龙江大学工程学报》2013年第4期1-4,共4页Journal of Engineering of Heilongjiang University

基　　金：黑龙江省自然科学基金项目(E200827);黑龙江省人事厅留学回国人员科技项目(200923);黑龙江省交通运输厅重点科技项目(T0805)

摘　　要：湿喷混凝土在体积、反弹及工作环境方面明显优于干喷混凝土。利用各种混凝土外加剂、硅粉、纤维加固的方法，能够产生高强度混凝土。测试结果表明，钢纤维可以替代100-150mm钢丝网衬砌，具有更大的韧性。具有早期强度高的钢纤维混凝土，通过应用遥控喷钻机，提高了施工效率。应用湿喷钢纤维混凝土比采用相同厚度钢丝网衬砌效率提高3～6倍。虽然钢纤维混凝土材料的成本约比钢丝网混凝土高70％～80％，因工效高最终成本节约10％～20％，岩锚与钢纤维喷射混凝土组合支护适用于临时和永久边坡支护。Wet-process shotcrete is superior to dry-process with respect to capacity, rebound and working conditions. Use of various concrete additives, micro-silica and fibre reinforcement, together with general improvement of the method, have made it possible to produce high-strength concrete. Both test results and a great deal of experience show that steel fibers can successfully replace wire mesh in linings of thicknesses of up to 100--150 mm, giving linings which are at least equally strong and more ductile. Use of fibre- reinforced concrete with a high early strength, applied by remote-controlled shotcreting rigs, has considerably reduced the delay caused by shotcreting rigs. Applying fibre-reinforced concrete is 3 to 6 times faster than applying linings of the same thickness. Although the cost of the materials for fibre- reinforced concrete is about 70%--80% higher than the price of concrete and wire mesh, the final product may be 10%-20% cheaper. Use of fibre-reinforced shotcrete in combination with rock bolts is very suitable for combining temporary and final support.

关 键 词：湿喷 喷射混凝土 硅粉 钢纤维 边坡工程 

分 类 号：TU528.53[建筑科学—建筑技术科学]