本文選題：引水隧洞 + 高地溫��； 參考：《水利水電技術(shù)》2017年11期

【摘要】：在高地溫條件下,溫度場(chǎng)是影響引水隧洞結(jié)構(gòu)穩(wěn)定的重要因素。為了研究不同工況下引水隧洞的溫度場(chǎng)特性,以新疆布侖口—公格爾水電站高地溫引水隧洞為依托,采用有限元仿真模擬的方法建立三維模型,對(duì)不同工況下高地溫引水隧洞圍巖及襯砌結(jié)構(gòu)的穩(wěn)態(tài)溫度場(chǎng)特性進(jìn)行了模擬計(jì)算,并取襯砌結(jié)構(gòu)及圍巖不同測(cè)點(diǎn)的溫度場(chǎng)特性值進(jìn)行對(duì)比分析。結(jié)果顯示:受洞口及掌子面影響,圍巖及襯砌溫度隨洞深增大可分為平緩段和驟升段兩個(gè)階段,且呈非線性變化。襯砌腰拱與頂拱內(nèi)表面溫差隨洞深增大逐漸減小,且與工況有關(guān),施工期最大值為1.26℃,運(yùn)行期最大值為0.22℃。從模擬結(jié)果與實(shí)測(cè)結(jié)果的對(duì)比分析可知,實(shí)測(cè)與模擬所得圍巖溫度場(chǎng)分布特性相同。研究成果可為高地溫引水隧洞熱力耦合分析及其洞室穩(wěn)定性提供了理論依據(jù),同時(shí)也可為高地溫區(qū)相關(guān)工程提供參考。
[Abstract]:Under the condition of high ground temperature, the temperature field is an important factor affecting the stability of diversion tunnel structure.In order to study the temperature field characteristics of diversion tunnel under different working conditions, based on the highland temperature diversion tunnel of Brunkou-Gongge Hydropower Station in Xinjiang, a three-dimensional model was established by using finite element simulation method.The steady-state temperature field characteristics of surrounding rock and lining structure of highland temperature diversion tunnel under different working conditions are simulated and calculated, and the characteristic values of temperature field of lining structure and surrounding rock at different measuring points are compared and analyzed.The results show that the temperature of surrounding rock and lining can be divided into two stages with the increase of the depth of the tunnel by the influence of the orifice and the face of the tunnel, and the temperature of the surrounding rock and lining can be divided into two stages: the flat section and the sudden rise section.The temperature difference between the lining waist arch and the top arch gradually decreases with the increase of the hole depth, and is related to the working conditions. The maximum value during construction is 1.26 鈩，

本文編號(hào)：1739996