【摘要】：比較大型的碾壓混凝土壩的混凝土用量一般都超過百萬方,施工工期非常長。在進(jìn)行施工組織設(shè)計(jì)時(shí),很難全面顧及施工中的各項(xiàng)因素,得到合適的施工組織方案。另外,碾壓混凝土壩的施工倉面較大,而且每一碾壓層的混凝土澆筑作業(yè)連續(xù)進(jìn)行,這就要求各工作環(huán)節(jié)達(dá)到高度協(xié)調(diào),如果整個(gè)施工系統(tǒng)的機(jī)械設(shè)備配置不合理,那么它將成為制約混凝土快速施工的“瓶頸”。因此,對碾壓混凝土壩施工進(jìn)行計(jì)算機(jī)模擬,選擇合適的施工機(jī)械配置,是保證工程建設(shè)如期完成和降低工程造價(jià)的關(guān)鍵。本文為了優(yōu)化碾壓混凝土壩施工機(jī)械設(shè)備配置,選擇合理的施工組織方案,建立了包括拌合、運(yùn)輸和倉面澆筑的仿真模型,進(jìn)行施工過程的模擬研究。在分析了碾壓混凝土壩施工系統(tǒng)的基礎(chǔ)上,將其劃分為拌合運(yùn)輸系統(tǒng)和壩面作業(yè)系統(tǒng),根據(jù)離散事件系統(tǒng)仿真原理,運(yùn)用計(jì)算機(jī)仿真軟件建立了碾壓混凝土壩施工系統(tǒng)模型。該系統(tǒng)屬于離散事件系統(tǒng),GPSS是一種面向過程的通用離散事件系統(tǒng)仿真語言,用它編制的仿真軟件具有簡單易讀,調(diào)整參數(shù)、設(shè)置方案靈活,通用性較強(qiáng)等特點(diǎn),能夠較為精確地反映碾壓混凝土壩施工的實(shí)際情況。所以本文選用GPSSWorld仿真軟件建立模型。針對某一具體的倉面進(jìn)行了仿真模擬,通過改變模型的輸入?yún)?shù),模擬不同施工方案。對每個(gè)方案的機(jī)械利用率、工期以及混凝土澆筑強(qiáng)度等指標(biāo)進(jìn)行綜合分析,通過方案優(yōu)選,尋求最優(yōu)機(jī)械配置。碾壓混凝土壩施工受到倉外拌合運(yùn)輸以及倉面作業(yè)互相干擾,每個(gè)階段的影響因素不同。當(dāng)倉面施工機(jī)械配置較低時(shí),主要受到倉面澆筑作業(yè)的影響；當(dāng)倉面施工機(jī)械配置較高時(shí),受到拌合運(yùn)輸強(qiáng)度的制約。結(jié)果表明模型具有很強(qiáng)的實(shí)用性,模擬結(jié)果滿足施工的約束條件,符合工程實(shí)際。為碾壓混凝土壩的施工組織計(jì)劃提供了一個(gè)非常合理的依據(jù),達(dá)到了優(yōu)化資源配置、縮短施工工期的目的,具有十分重要的現(xiàn)實(shí)意義。
[Abstract]:Large RCC dams usually use more than one million square concrete, and the construction period is very long. In the construction organization design, it is difficult to take all the factors into account and get the appropriate construction organization scheme. In addition, the construction silo surface of RCC dam is large, and the concrete pouring operation of each roller compacted layer is carried out continuously, which requires a high degree of coordination among all work links, if the mechanical and equipment configuration of the whole construction system is not reasonable, Then it will be restricted by the rapid construction of concrete "bottleneck." Therefore, the computer simulation of RCC dam construction and the selection of appropriate construction machinery configuration are the key to ensure the completion of the project construction on time and reduce the project cost. In order to optimize the configuration of construction machinery and equipment of RCC dam, a simulation model including mixing, transportation and silo surface pouring is established to simulate the construction process. Based on the analysis of RCC dam construction system, the RCC dam construction system is divided into mixing transportation system and dam surface operation system. According to the simulation principle of discrete event system, the model of RCC dam construction system is established by computer simulation software. The system belongs to discrete event system. GPSS is a general simulation language of discrete event system oriented to process. The simulation software developed by the system is simple and easy to read, adjusts parameters, sets the scheme flexibly, and has strong generality. It can accurately reflect the actual situation of RCC dam construction. So this paper chooses GPSSWorld simulation software to build the model. By changing the input parameters of the model, different construction schemes are simulated. The mechanical utilization ratio, construction period and concrete pouring strength of each scheme are comprehensively analyzed, and the optimal mechanical configuration is sought through the optimal selection of the scheme. The construction of RCC dam is interfered with each other by outside mixing transportation and silo surface operation, and the influencing factors are different in each stage. When the construction machinery is low, it is mainly affected by the pouring operation, and when the construction machinery is high, it is restricted by the intensity of mixing and transportation. The results show that the model has strong practicability, and the simulation results meet the constraints of the construction and accord with the engineering practice. It provides a very reasonable basis for the construction organization plan of RCC dam and achieves the purpose of optimizing the allocation of resources and shortening the construction period. It has very important practical significance.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TV544.921

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本文編號(hào)：2323931