【摘要】：水庫是江河防洪體系中不可缺少的一部分,是調(diào)節(jié)水資源的重要水利工程。桐樹溝水庫是一座以防洪為主,兼有灌溉、供水、養(yǎng)殖等綜合效益的小(二)型水庫,限于建設(shè)時(shí)期的各方條件,桐樹溝水庫出現(xiàn)了不同程度的險(xiǎn)情和隱患,因此對桐樹溝水庫進(jìn)行除險(xiǎn)加固的優(yōu)化設(shè)計(jì)具有重要的工程應(yīng)用價(jià)值。本文在對水庫、大壩除險(xiǎn)加固等相關(guān)文獻(xiàn)進(jìn)行研究的基礎(chǔ)上,通過對桐樹溝水庫除險(xiǎn)加固工程在勘察設(shè)計(jì)、施工、質(zhì)量監(jiān)測等各階段所采用的大壩除險(xiǎn)加固技術(shù)進(jìn)行全面分析、總結(jié)和研究,得出了以下成果:(1)針對不同設(shè)計(jì)工況下滲流計(jì)算浸潤線較高和下游壩坡在相應(yīng)工況下最小安全系數(shù)小于規(guī)范值的問題,采取了大壩壩頂?shù)缆芳訉�、加高防浪墻、迎水坡改造處理、背水坡加固處理以及坡面排水改造的加固措�?增加了主體安全穩(wěn)定性,同時(shí)背水坡采取了種植草皮的生態(tài)措施,增加了大壩的觀賞性。(2)針對放水建筑物大范圍損毀、砌石風(fēng)化嚴(yán)重失去泄水能力的工程現(xiàn)狀,進(jìn)行了放水建筑物的設(shè)計(jì)優(yōu)化。通過方案優(yōu)化比選,選取了運(yùn)行可靠、結(jié)構(gòu)簡單、施工維護(hù)方便,且工程量和造價(jià)都較低的新建放水臥管方案。解決了放水建筑物損毀的問題,滿足了水庫日常運(yùn)行需要。(3)針對溢洪道彎道較多、底板變坡多、泄水條件不利、泄槽損毀、末端無消能防沖設(shè)施的問題,結(jié)合水庫調(diào)洪演算成果,優(yōu)化了水庫水位～溢流堰泄流量關(guān)系曲線,最終通過方案比選,確定了折線實(shí)用堰改造、部分泄槽改線、泄槽底板襯砌及末端增設(shè)消能防沖設(shè)施的最佳方案,大大增加了水庫的泄流能力。(4)本項(xiàng)工程的經(jīng)濟(jì)內(nèi)部收益率12. 60%大于社會折現(xiàn)率8%,經(jīng)濟(jì)凈現(xiàn)值106. 36萬元大于零,經(jīng)濟(jì)效益費(fèi)用比1.30大于1,故本工程在經(jīng)濟(jì)上是合理的,且經(jīng)濟(jì)效益顯著。通過對工程最終經(jīng)濟(jì)效益指標(biāo)的相關(guān)數(shù)據(jù)進(jìn)行分析評價(jià),大壩防滲加固技術(shù)效果良好,經(jīng)濟(jì)效益顯著,使病險(xiǎn)水庫重新煥發(fā)了生命力。
[Abstract]:Reservoir is an indispensable part of river flood control system and an important water conservancy project to regulate water resources. Tongshugou Reservoir is a small (2) type reservoir with comprehensive benefits such as irrigation, water supply and aquaculture, which is mainly concerned with flood control. Limited to the conditions of all parties during the construction period, the Tongshugou Reservoir has appeared different degrees of danger and hidden danger. Therefore, the optimal design of Tongshugou reservoir is of great value in engineering application. On the basis of the research on the relevant documents, such as reservoir, dam danger removal and reinforcement and so on, this paper makes a comprehensive analysis on the dam danger removal and reinforcement technology adopted in various stages such as survey and design, construction, quality monitoring and so on. The results are summarized and studied as follows: (1) aiming at the problems of high seepage line under different design conditions and the minimum safety factor of downstream dam slope being less than the standard value under the corresponding working conditions, the road widening of dam top is adopted. The safety and stability of the main body are increased by raising the wave wall, improving the treatment of facing the water slope, strengthening the backwater slope and the drainage reform of the slope, and taking ecological measures of planting turf on the backwater slope, (2) in view of the present situation of large scale damage and serious loss of drainage capacity of masonry weathering, the design optimization of the drainage structure is carried out. Through the optimization and selection of the project, a new water discharge horizontal pipe scheme with reliable operation, simple structure, convenient construction and maintenance and low engineering volume and cost is selected. The problem of water release structure damage is solved and the need of daily operation of reservoir is satisfied. (3) aiming at the problems of spillway with more bends, more sloping bottom slab, unfavorable discharge condition, damaged drain channel and no energy dissipation and anti-scour facilities at the end, Combined with the results of reservoir flood control calculation, the relationship curve between reservoir water level and overflow Weir discharge is optimized. Finally, through the scheme comparison and selection, the practical reconstruction of broken line Weir and the modification line of partial discharge channel are determined. The best scheme for lining the bottom slab and installing energy dissipation and anti-scour facilities at the end greatly increases the discharge capacity of the reservoir. (4) the economic internal rate of return of this project is 12.2%. 60% is more than the social discount rate 8%, economic net present value 106. 6%. 360000 yuan is more than zero and the ratio of economic benefit to cost is more than 1, so the project is reasonable in economy and remarkable in economic benefit. Through the analysis and evaluation of the relevant data of the final economic benefit index of the project, it is found that the dam seepage prevention and reinforcement technology has a good effect and remarkable economic benefit, which makes the dangerous reservoir of the disease fresh with vitality.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TV697.3

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