一种基于双频雷达相干投影成像算法的壁后注浆厚度检测方法

• Format: Patent
• Language: Chinese
• Published: 09.09.2022
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

本发明涉及一种基于双频雷达相干投影成像算法的壁后注浆厚度检测方法，其特征在于，令低频雷达和高频雷达以固定的相对位置沿隧道管片内壁进行环向运动，对隧道管片后方注浆进行检测，获取双频信号，通过双频信号的相干强度进行快速成像，根据成像结果判断注浆体厚度。与现有技术相比，本发明可以快速准确地对盾构隧道壁后注浆厚度进行评价，为隧道运营及维护提供依据，在隧道结构检测中有很好的应用前景。低频雷达信号频率范围为200～600Mhz，高频雷达信号频率范围为700～1100Mhz，可保证探测结果满足探测深度及精度要求。低频信号与高频信号之间差值宜为：300～700Mhz，可保证信号之间的独立性。 The invention relates to a backwall grouting thickness detection method based on a dual-frequency radar coherent projection imaging algorithm. The method is characterized in that a low-frequency radarand a high-frequency radar move circularly along the inner wall of a tunnel segment at fixed relative positions, back grouting of the tunnel segment is detected, dual-frequency signals are acquired,fast imaging is carried out through the coherent intensity of the dual-frequency signals, and the grouting thickness is judged according to an imaging result. In comparison with the prior art, the backwall grouting thickness of a shield tunnel can be evaluated quickly and accurately, a basis is provided for tunnel operation and main