Abstract:
Mitigation of building settlement can be accomplished in a variety of different ways. Depending upon the circumstances one approach may prove beneficial in comparison to other methods. Such is the case for settlement mitigation efforts of a large, heavily loaded, manufacturing operation constructed over landfill materials in Golden, Colorado. In 2008 Williams Form Engineering built a 31, 500 SF manufacturing operation adjacent to an abandoned municipal landfill. Soon thereafter settlement along the western half of the building necessitated design work that led to mitigation efforts to slow the settlement to an acceptable level. Rigid support systems were evaluated prior to selection of a low mobility grout support approach that was less intrusive for the owner and enabled operations to continue during mitigation efforts. (2) Compaction grouting activities were performed in 2015 and in 2020. The 2015 initial grouting was done in order to study the effectiveness of the compaction grouting approach, provide owners with information for future mitigation efforts, and provide critical support for the highly loaded center columns in this large, 2-bay manufacturing facility. After 5 years of review, compaction grouting was continued on the west wall of the facility, thereby completing the support for the entire main structure. This presentation will cover the support options studied, selection criteria for the low mobility approach, data presentation of approximately 10 years of settlement survey and comments regarding performance for the selected compaction grouting system.