Coaxial cable composite grouting body suitable for monitoring slope by using TDR (time domain reflectometry) signals

The invention discloses a coaxial cable composite grouting body suitable for monitoring a slope by using TDR (time domain reflectometry) signals. The coaxial cable composite grouting body comprises a coaxial cable, wherein the diameter of an inner conductor of the coaxial cable is 2.15mm; the outer diameter of an insulator of the coaxial cable is 8.90mm; the outer diameter of an outer conductor of the coaxial cable is 10.80mm; the outer diameter of a protective jacket of the coaxial cable is 12.50mm; characteristic impedance of the coaxial cable is 75 omega; the coaxial cable has a four-layered shielding structure; a shielding material is woven by aluminum foils and tin plated copper wires; attenuation constant is smaller than or equal to 1.0dB/100m when frequency is 5MHz; return loss is greater than or equal to 22dB when the frequency is smaller than or equal to 300MHz; and shielding attenuation is greater than or equal to 85dB when the frequency is 5MHz. The protective leather jacket of the coaxial cable is peeled off before in-site drilling embedment, the coaxial cable without the protective leather jacket is filled in the center of a drilled hole, the drilled hole is filled with cement mortar, the mix proportion of cement to sand in the cement mortar is 1:1-2, and the strength of the cement mortar is once to three times greater than that of soil of the slope.