席均, 施斌, 魏广庆, et al. Research on Strain-temperature Joint Test Methods of Precast Piles by Using BOTDR[J]. 2012, 32(3): 281-286. DOI: 10.13409/j.cnki.jdpme.2012.03.004.
This paper presents a distributed strain-temperature joint test method
which can be used for differently distributed temperature compensation by a special packaging way to switch sensing cable’s frequency shift coefficient.The feasibility of this method is verified by a submerging test of precast piles.This method is used in the test for temperature compensation.The strain-temperature distribution law along the pile body and variation law are analyzed.The study shows that: firstly
the strain-temperature joint test method can solve the differently distributed temperature compensation problem preferably.Secondly
temperature in a submerging test of precast piles changes greatly due to the infiltration of water
so the contribution of strain and temperature to frequency shift is complicated.