高分子材料SH渗透加固遗址土的效果研究

REINFORCING EFFECT OF RELIC SOIL SITES PENETRATED WITH HIGH POLYMER MATERIAL SH

西北地区的土遗址由于外界环境对其破坏作用以及自身的物理力学性能相对较差的原因,导致其逐渐消失。对土遗址坍塌、掏蚀等部位,可以采用拌和回填的方式进行恢复,而表面风化则需要喷洒或钻孔注浆进行加固。本文对经高分子材料SH渗透加固后的遗址土的抗崩解能力、抗干湿循环能力、抗冻融循环能力以及Na Cl易溶盐的迁移特点从质量损失率的角度进行研究分析,发现经SH渗透加固后抗崩解能力大大提高、抗干湿循环的能力随干密度的增大而增大、抗冻融循环能力变化受含水率和干密度共同影响,干密度越小,平衡含水率值越大、SH能够抑制水分向土体上部迁移,最后对以上各种试验现象进行合理的解释。

Relic soil sites are disappearing gradually due to the damage of their external environment and themselves＇ worse physical and mechanical properties. The collapsed and sapping at part of relic soil sites can be recovered by mixing then backfilling. The surface which was weathered away needs spray or hole grouting consolidation. In this article,we research into Na Cl solute＇s migration,the collapse resistance ability,dry wet circulation resistance ability and freeze circulation resistance ability of relic soil sites with different dry density values. The relic soils are reinforced by penetrating the high polymer material SH in the perspective of mass loss.We discover that after penetrating SH,the ability of collapse resistance is improved greatly. The ability of dry-wet circulation resistance increases with the growth of dry density. The change of freeze circulation resistance ability is influenced by both water content and dry density. The lower dry density,the higher value of equilibrium moisture content. SH can inhibit water to migrate to the upper. At last,we explain the above experiment phenomenon reasonably.