Application of non-destructive detection technology to underground diseases of roads based on transient surface wave method
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摘要: 针对杭州市某道路产生塌陷和裂缝的问题，利用瞬态面波法开展道路地下病害无损探测。根据地基波速试验探测结果分析不同地层情况，确定道路地下病害范围，为处理道路安全隐患提供了及时准确的数据资料。探测结果表明，道路下方7 m范围内存在土体疏松病害，给出的建议为部分区域进行注浆加固，部分区域清除表面碎石；瞬态面波法图像直观、经济快速，能够确定出具有工程灾害隐患的病害，为道路的检修和维护提供充分的科学依据。Abstract: In view of the collapse and crack of a road in Hangzhou city, the transient surface wave method is used for detecting the underground diseases. Based on the ground wave velocity tests, the stratum properties under different conditions and the distribution of underground diseases of the road can be determined, which provides timely and accurate data for handling its safety hazards. The detected results show that the soil mass is loose within 7 m below the road, and the suggestions given are grouting reinforcement in some areas and removal of surface gravel in some areas. The image of transient surface wave method is intuitive, economical and fast, which can identify the diseases with potential engineering disasters, and it provides sufficient scientific basis for the repair and maintenance of roads.
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Keywords:
- non-destructive test /
- transient surface wave /
- survey line /
- road /
- disease
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图 4 测线1-1地基深度与剪切波速的关系
Figure 4. Relationship between depth and shear wave velocity of line 1-1
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图 5 测线1-2地基深度与剪切波速的关系
Figure 5. Relationship between depth and shear wave velocity of line 1-2
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图 6 测线2-1地基深度与剪切波速的关系
Figure 6. Relationship between depth and shear wave velocity of line 2-1
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图 7 测线2-2地基深度与剪切波速的关系
Figure 7. Relationship between depth and shear wave velocity of line 2-2
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图 8 测线3-1地基深度与剪切波速的关系
Figure 8. Relationship between depth and shear wave velocity of line.3-1
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图 9 测线3-2地基深度与剪切波速的关系
Figure 9. Relationship between depth and shear wave velocity of line.3-2
表 1 各分层剪切波速
Table 1 Shear wave velocities of soil layers
深度范围/m 土层名称 标准波速Vs/(m·s-1) 0.8~1.9 素填土 132 1.9~4.2 砂质粉土 152 4.2~7.4 砂质粉土夹粉砂 172 7.4~14.4 砂质粉土 185 14.4~28.9 淤泥质粉质黏土 112 
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