Experimental investigation of compaction-grouted soil nails
Experimental investigation of compaction-grouted soil nails
复制标题
DOI：
10.1139/cgj-2017-0063
复制
发表时间：
2017-05
影响因子：
3.6
通讯作者：
Qiong Wang;Xinyu Ye;Shanyong Wang;S. Sloan;D. Sheng
中科院分区：
文献类型：
--
作者：
Qiong Wang;Xinyu Ye;Shanyong Wang;S. Sloan;D. Sheng
设计了一种新型的注浆土钉，通过将浆液注入到一个特殊的乳胶气球（注浆袋）中，以避免浆液渗透到周围的土壤中。通过一系列大型模型试验，研究了注浆对周围土体的影响及土钉的抗拔性能。试验结果表明，注浆压力对提高周围土体的密实度和（或）强度有重要作用。此外，在拔出过程中，注浆土钉表现出应变硬化行为，没有屈服点。这是这种新型土钉的一个显著优点，表明它可以使土体在最终破坏之前保持稳定，抵抗相对较大的变形。新型土钉抗拔力提高的主要原因是：一是注浆使注浆袋附近土体固结密实，从而提高了土钉的抗拔力。
An innovative compaction-grouted soil nail was designed by injecting grout into a special latex balloon (grouting bag) to avoid bleeding and penetration of grout into the surrounding soil. A series of large-scale model tests was performed to study the surrounding soil responses due to grouting and the subsequent pull-out resistance of the soil nail. The experimental results show that grouting pressure plays an important role in the enhancement of the density and (or) strength of the surrounding soil. In addition, during the pull-out process, the compaction-grouted soil nail exhibits a strain-hardening behaviour without a yield point. This is a significant advantage of this new soil nail, indicating that it can enable soil masses to remain stable against a relatively large deformation before ultimate failure. The main factors behind the improvement of the pull-out resistance of the new soil nail are, first, the compaction–densification of the soil near the grouting bag due to grouting, resulting in the enh...