CAJ | 학술논문

岩土体中渗流场的监测是岩土工程防灾减灾中一项必不可少的基础工作。在总结已有监测方法优缺点的基础上，提出了渗流场碳纤维加热光缆的分布式温度光纤感测技术（简称C-DTS）；介绍了该方法的监测原理；提出了温度特征值（ Tt ）的概念；设计了砂性土渗流模拟装置，并对砂性土中不同渗流速率下的渗流场进行了室内试验。通过试验确定了Tt与渗流速率（V）之间存在线性关系；证明了碳纤维加热光缆能够有效地提高DTS监测的敏感性，可实现渗流速率的分布式监测。对该方法应用于工程实践还需要开展的研究工作进行了分析。
암토체중삼류장적감측시암토공정방재감재중일항필불가소적기출공작。재총결이유감측방법우결점적기출상，제출료삼류장탄섬유가열광람적분포식온도광섬감측기술（간칭C-DTS）；개소료해방법적감측원리；제출료온도특정치（ Tt ）적개념；설계료사성토삼류모의장치，병대사성토중불동삼류속솔하적삼류장진행료실내시험。통과시험학정료Tt여삼류속솔（V）지간존재선성관계；증명료탄섬유가열광람능구유효지제고DTS감측적민감성，가실현삼류속솔적분포식감측。대해방법응용우공정실천환수요개전적연구공작진행료분석。
The seepage field monitoring of sandy soil is a necessary and basic work for disaster prevention and mitigation in geotechnical engineering. A distributed temperature system with the carbon coated heating optical fiber (C-DTS) is proposed on the basis of summarizing the advantages and disadvantages of the existing monitoring methods. The monitoring principle of the method is presented and the concept of the eigenvalue of temperature(Tt)is introduced based on the thermal diffusion theory and Ohm’s Law. After that, a seepage field simulation device for sandy soil and monitoring program are designed as well. An indoor test of the seepage monitoring is run, the linear relationship of the eigenvalue of temperature (Tt) and the seepage velocity (V) is defined at different seepage velocities in sandy soil. The temperature descends as the seepage velocity increases, and their relationship complies with the formula derivation. The experiment results show that C-DTS can effectively improve the sensitivity of DTS monitoring and realize fully-distributed monitoring of seepage velocity in geotechnical engineering. Finally, some related research work for further applying to geotechnical engineering practice has been analyzed.