CAJ | 학술논문

在考虑并行隧道耦合传热的前提下，预测越江公路隧道江岸浅埋段地温的长期演化，使用有限差分法进行数值模拟，通过现场观测与数值迭代方式确定边界条件与初值．模拟结果表明：最终的计算稳定传热时间为68年，但传热在20年内即基本完成；隧道周围的初始恒温土层最终被转变为年变温土层；隧道外侧5 m及两孔之间出现了一个显著变温区，其最大温升值为7．14℃，最大年度温升的峰谷值为10℃；隧道周围10 m以下土层的温度变化仅由隧道传热所控制；两孔之间土层的最终稳定温度要高于其他位置的最终稳定温度，证实了耦合传热效应的存在．此外，还提出了一组单变量函数的回归模型，用以估计隧道周围不同位置土层的年度温度波动量．该研究将有助于深入探究隧道浅埋段所穿越江滩区域工程地质条件的长期演化趋势．
재고필병행수도우합전열적전제하，예측월강공로수도강안천매단지온적장기연화，사용유한차분법진행수치모의，통과현장관측여수치질대방식학정변계조건여초치．모의결과표명：최종적계산은정전열시간위68년，단전열재20년내즉기본완성；수도주위적초시항온토층최종피전변위년변온토층；수도외측5 m급량공지간출현료일개현저변온구，기최대온승치위7．14℃，최대년도온승적봉곡치위10℃；수도주위10 m이하토층적온도변화부유수도전열소공제；량공지간토층적최종은정온도요고우기타위치적최종은정온도，증실료우합전열효응적존재．차외，환제출료일조단변량함수적회귀모형，용이고계수도주위불동위치토층적년도온도파동량．해연구장유조우심입탐구수도천매단소천월강탄구역공정지질조건적장기연화추세．
Considering the coupled heat transfer effect induced by parallel cross-river road tunnels, the long-term soil temperature variations of shallow sections of cross-river tunnels under the river beach are predicted using the finite difference method for numerical simulation. The boundary conditions and the initial values are determined by in situ observations and numerical iterations.The simulation results indicate that the ultimate calculated steady heat transfer time is 68 years, and most of the heat transfer is completed in 20 years.The initial constant temperature soil surrounding the tunnels is transformed to an annually variable one.An obvious temperature-varying region of the surrounding soil is discovered within 5 m from the tunnel exterior, as well as within the entire range of soil between the two tunnels.The maximum temperature increase value reaches 7.14 ℃ and the maximum peak-to-valley value of annual temperature increase reaches 10 ℃.The temperature variation of soils surrounding tunnels below 10 m is completely controlled by the heat transfer from the tunnels.The coupled heat transfer effect is confirmed because the ultimate steady temperature of soil between the two tunnels is higher than the ones along other positions.Moreover, the regression model comprising a series of univariate functions is proposed for the annual soil temperature fluctuation estimation for the locations varied distances around the tunnel.This investigation is beneficial to gain an insight into the long-term variation tendencies of local engineering geological conditions of the river beach above shallow sections of the cross-river road tunnels.