本文選題：地質(zhì)雷達(dá) + 襯砌質(zhì)量檢測�。� 參考：《西安科技大學(xué)學(xué)報(bào)》2017年02期

【摘要】：針對(duì)目前隧道襯砌檢測中存在的精度不高問題,采用理論分析和現(xiàn)場實(shí)際測試相結(jié)合的方法,分析了地質(zhì)雷達(dá)襯砌檢測精度的影響因素,研究表明:隧道襯砌檢測準(zhǔn)確性的關(guān)鍵在于襯砌介電參數(shù)ε的選取,襯砌混凝土強(qiáng)度和含水量在一定程度上決定了襯砌的介電常數(shù)和混凝土的齡期;利用線性回歸確定了襯砌介電參數(shù)ε與混凝土水灰比、齡期以及強(qiáng)度的相關(guān)關(guān)系。在檢測參數(shù)方面,表面波的拾取和數(shù)據(jù)處理理念對(duì)襯砌檢測精度影響顯著,采用不同頻率的雷達(dá)天線時(shí)襯砌的檢測精度不同。為提高襯砌檢測精度在隧道拱頂、拱腰部位宜采用900 MHz天線,邊墻部位宜采用400 MHz天線;在檢測中需要根據(jù)襯砌混凝土的不同齡期采用不同的介電參數(shù)。
[Abstract]:Aiming at the problem of low precision in tunnel lining detection at present, this paper analyzes the influencing factors of the precision of geological radar lining detection by using the method of combining theoretical analysis with field testing. The results show that the key to the accuracy of tunnel lining detection lies in the selection of lining dielectric parameter 蔚. The strength and water content of lining concrete determine the dielectric constant and age of lining to a certain extent. The correlation between dielectric parameter 蔚 and water cement ratio, age and strength of concrete is determined by linear regression. In terms of detection parameters, the concept of surface wave pickup and data processing has a significant impact on the detection accuracy of lining, and the detection accuracy of lining is different when radar antenna with different frequencies is used. In order to improve the detection accuracy of lining at the vault of the tunnel, 900MHz antenna should be used at the waist of the arch and 400MHz antenna should be used in the side wall, and different dielectric parameters should be adopted according to the age of the lining concrete.
【作者單位】： 中鐵一院集團(tuán)南方工程咨詢監(jiān)理有限公司;
【基金】：國家自然科學(xué)基金(51578447)
【分類號(hào)】：U455.91

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