本文關(guān)鍵詞： 水電站地下洞室群 施工期 濕源 除濕方式　出處：《西南交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：大型水電站地下洞室群主要由主廠房、主變室、尾調(diào)室、交通洞以及導(dǎo)流洞等組成,各洞室之間相互交叉,結(jié)構(gòu)復(fù)雜且埋深較大,存在施工周期長、通風(fēng)不暢、地下水滲漏及巖體散濕等特點(diǎn),如果再遇到特殊的地質(zhì)條件,將使隧道內(nèi)形成高濕環(huán)境。而濕度過高會嚴(yán)重危害作業(yè)人員的身體健康,影響作業(yè)人員的工作效率,導(dǎo)致隧道施工不能安全有效的開展。因此,對隧道內(nèi)濕環(huán)境及控制方法進(jìn)行研究,具有重要的理論意義和工程實(shí)用價(jià)值。 本文以在建大型水利工程—白鶴灘水電站地下洞室群工程為背景,針對施工期導(dǎo)流洞(尾水隧道)濕度較高的問題,對其濕環(huán)境和控制方法進(jìn)行研究。首先通過現(xiàn)場調(diào)研,獲取了水電站地下洞室群施工期的實(shí)際熱濕環(huán)境及散濕源,分析了施工期水電站地下洞室群熱濕環(huán)境的影響因素及物理過程,確定了水電站地下洞室群的主要散濕源,并根據(jù)理論分析,推導(dǎo)得出壁面散濕量隨室內(nèi)溫濕度變化的計(jì)算公式；然后,通過實(shí)驗(yàn)測試與數(shù)值計(jì)算對比,建立了濕環(huán)境的計(jì)算方式及散濕邊界條件的給定方法；最后,通過數(shù)值計(jì)算,分析了不同除濕方式、不同送風(fēng)方式、不同送風(fēng)狀態(tài)及不同送風(fēng)量等因素對施工期水電站地下洞室群掌頭區(qū)濕環(huán)境的影響,并給出了施工期水電站地下洞室群掌頭區(qū)宜采用的除濕方式及濕環(huán)境的計(jì)算和控制方法。 本文建立的施工期水電站地下洞室群壁面散濕量的計(jì)算方法及給出的施工期水電站地下洞室群掌頭區(qū)濕環(huán)境的計(jì)算和控制方法,可為實(shí)際水電站地下工程濕環(huán)境控制提供參考。
[Abstract]:The underground cavern group of large hydropower station is mainly composed of main workshop, main transformer room, tail-adjusting room, traffic tunnel and diversion tunnel. Each cavern intersects with each other, the structure is complex and buried deep, the construction period is long, the ventilation is not smooth, etc. The characteristics of groundwater leakage and rock mass dampness, if the special geological conditions are encountered again, will lead to the formation of high humidity environment in the tunnel. However, too high humidity will seriously harm the health of the workers and affect the working efficiency of the workers. As a result, tunnel construction can not be carried out safely and effectively. Therefore, it is of great theoretical significance and practical value to study the wet environment and control methods in the tunnel. Based on the underground cavern group engineering of Baihetan Hydropower Station, a large water conservancy project under construction, the wet environment and control methods of diversion tunnel (tailrace tunnel) during construction period are studied in this paper. In this paper, the actual thermal and wet environment of underground cavern group during the construction period of hydropower station is obtained. The influencing factors and physical process of thermal and wet environment of underground cavern group in hydropower station during construction period are analyzed, and the main source of moisture dissipation of underground cavern group of hydropower station is determined. According to the theoretical analysis, the formula for calculating the variation of wall moisture with indoor temperature and humidity is derived. Then, through the comparison of experimental test and numerical calculation, the calculation method of wet environment and the method of setting up the boundary condition of moisture dissipation are established. Through numerical calculation, the effects of different dehumidification modes, different air supply modes, different air supply states and different air supply rates on the wet environment of the underground cavern group in the construction period are analyzed. The method of dehumidification and the calculation and control method of wet environment for underground cavern group of hydropower station during the construction period are also given. In this paper, the calculation method of wall moisture dissipation of underground cavern group in hydropower station during construction period and the calculation and control method of wet environment of underground cavern group in hydropower station during construction period are established in this paper. It can be used as a reference for the control of wet environment in underground engineering of hydropower station.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TV554

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