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隧道内防水阻裂层的防水阻裂效果与防水阻裂夹层及上下层间的结合状态密切相关,所以准确了解其与上下层间的结合状态是非常重要的。采用SIR-20型地质雷达对重庆绕城高速公路的玉峰山隧道进行检测。结果表明:隧道右幅聚酯玻纤布的层间结合状态比左幅的防水卷材结合状态好。用拉拔试验对雷达检测结果进行验证,结果相吻合。可见,地质雷达在防水阻裂层层间结合性能检测和施工验收等方面具有广阔的应用前景。
Waterproof and anti-cracking in tunnel waterproofing and anti-blocking effect is closely related to the waterproofing and anti-cracking interlayer and the bonding status between upper and lower layers. Therefore, it is very important to know accurately the bonding status between upper and lower layers. The SIR-20 geological radar was used to test the Yufengshan Tunnel in Chongqing Ring Expressway. The results show that the interlayer bonding state of the right-span polyester fiberglass cloth in the tunnel is better than that of the waterproofing membrane in the left. The pullout test is used to verify the radar test results. The results are in good agreement. It can be seen that GPR has broad application prospects in the field of waterproof barrier layer performance inspection and construction acceptance.