研究目的：路基压实是铁路路基施工极其重要的环节，而路基压实度则是保证路基压实质量的关键，长期以来，对施工现场路基压实度检测存在取样周期长、频率高、工作量大的问题，这些问题严重影响施工进度，造成不可预测的经济损失。针对上述问题，本文提出一种引入BIM模型的路基压实监测技术，从而实现对路基压实自动采样、处理、一体化模拟展示和管理的功能，减少人工干预，提高路基施工的效率。
研究结论:(1)将BIM技术引入到路基压实施工过程中去，将会提高路基施工的精度和质量，控制施工成本；（2）利用基于里程的BIM模型生成算法可以消除离散后数据边界的锯齿，减少数据冗余，实现几何模型和路基压实度信息的自动挂接；（3）压实信息的精度将取决于施工车辆GPS的精度和BIM模型网格的大小，一般来讲，网格越小，精度越大，计算速度越慢，在施工过程中采用0.1 m的网格间距既可保证施工精度也可保证计算速度；（4）本研究成果对推广BIM技术在铁路施工管理方面具有重要的意义。
Abstract
Abstract：Research purposes： Subgrade compaction is a crucial link in the construction of railway roadbed, and the degree of compaction is the key to quality assurance of roadbed construction. For a long time, testing compacted roadbed always suffers from long delay, high frequency and heavy workload problems. Those problems seriously influence the construction process and cause unpredictable economic losses. In order to deal with those problems, it proposes a detection technology of subgrade compaction using BIM models, and this method achieves automatic sample, disposition, integration display and management, reduces the manual operation and improves the efficiency of roadbed construction.
Research conclusions：(1) BIM technology is introduced into the construction of railway roadbed can improve accuracy and quality of subgrade construction, control the construction cost. (2) The algorithm of BIM models generation based on mileage can eliminate the jagged edges of discrete data, reduce the data redundancy and automatically construct the relationship between geometry models and roadbed compaction information. (3)The accuracy of roadbed compaction depends on the accuracy of GPS in construction vehicles and the grid size of BIM models. Generally, the smaller the gird size is, the higher the accuracy is, and the slower the computation speed is. So during construction, using 0.1 m gird size can guarantee both accuracy and speed. (4) The research results are of significance for railway construction management using by BIM technology.
关键词
路基压实 /
压实度 /
BIM /
GIS /
物联网
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Key words
Key words: subgrade compaction /
degree of compaction /
BIM /
GIS /
Internet of Things
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参考文献
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