在柔软土壤中优化防护道的同步料性能和施工参数
Hui Jin1,2, Enzhi Wang3, Dajun Yuan4
1State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, 100084, China. jinhbj@163.com.
Scientific reports
|July 20, 2025
概括
优化屏蔽同步接材料和施工参数可以防止道浮动和脱位. 这项研究推了特定的接比率和道速率,以提高软层道的稳定性.
科学领域:
- 地质技术工程 地质技术工程
- 道技术 道技术
- 材料科学 材料科学 材料科学
背景情况:
- 在屏蔽道挖掘中,不适当的同步接可以导致关键问题,如段浮动,道脱位,关节开口,变形和水泄漏.
- 这些故障危及道完整性和运行安全,需要改进接材料设计和施工参数控制.
研究的目的:
- 调查盾牌同步接性能,并开发接性能多目标优化方法.
- 确定最佳的接材料比率和施工参数,以防止道浮动并确保稳定性.
- 为在软层中建造盾道提供实际建议.
主要方法:
- 对盾牌同步接材料进行性能测试.
- 采用了多目标优化方法,考虑了初始设置时间,剪切产率强度,早期压力强度和密度.
- 利用数值模拟来分析施工参数的影响,并验证优化接性能.
主要成果:
- 确定了水-水泥 (0.602),粘合砂 (0.613),本托尼特-水 (0.267),水泥-灰 (0.733) 和添加剂- (0.010) 的最佳比率,以改善粘合物质的性能.
- 确定接性能,接压力,分布和屏蔽前进速度显著影响道稳定性.
- 推的最大盾牌道速率为83.28分钟/环,液体粘合剂长度为5个环,以获得最佳结果.
结论:
- 优化的同步料配方和控制的施工参数有效地减轻了盾牌段的浮动,并提高了道的稳定性.
- 特定的接策略,如将接限制在顶部部分或安装额外的高位置接孔,可以进一步提高稳定性.
- 这些发现提供了有价值的指导,以提高在具有挑战性的软地面条件下提高盾道施工的安全性和效率.
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