本文選題：井群降水 + 優(yōu)化設(shè)計(jì)��； 參考：《東北大學(xué)》2013年博士論文

【摘要】：1896年在建造伯林地下鐵道時(shí)第一次使用深井降水。目前,管井井群降水成為解決深基坑施工降水的重要措施。工程降水的難點(diǎn)表現(xiàn)在不確定因素多,降水設(shè)計(jì)是個(gè)動態(tài)調(diào)整的過程。降水方案設(shè)計(jì)重點(diǎn)考慮方案的合理性、有效性、環(huán)境效應(yīng)和經(jīng)濟(jì)性等因素。因此,工程降水設(shè)計(jì)需要兼顧上述因素實(shí)現(xiàn)方案的優(yōu)化設(shè)計(jì)。針對上述問題,本文基于目標(biāo)函數(shù)法和單純形法,建立了工程降水優(yōu)化模型,實(shí)現(xiàn)了保證施工安全水位前提下總排水量最小的目標(biāo),采用EXCEL軟件的“規(guī)劃求解”模塊實(shí)現(xiàn)了快速、靈活調(diào)整降水方案,可實(shí)現(xiàn)總排水量最小的目標(biāo),同時(shí)獲得單井排水量數(shù)據(jù),對方案約束狀態(tài)進(jìn)行評價(jià)。該方法具有靈活、快速的特征,利于在工程建設(shè)中應(yīng)用。分析了管井井群降水總排水量和水位降深的影響因素。采用正交試驗(yàn)設(shè)計(jì),得到在總排水量最小的前提下,對水位降深影響的主次順序?yàn)闈B透系數(shù)單井排水量含水層厚度降水井布置,獲得降水設(shè)計(jì)的優(yōu)組合原則�；贒arcy定律、Biot固結(jié)理論和有限單元法,采用COMSOL Multiphysics軟件的弱解形式,建立了真三維全耦合滲流模型,進(jìn)行地下水滲流和土體沉降的非線性分析,在降水滲流分析中首次實(shí)現(xiàn)了對單井排水量的賦值,實(shí)現(xiàn)了對降水區(qū)域滲流場變化的精細(xì)描述。針對具體實(shí)例,采用目標(biāo)函數(shù)法進(jìn)行降水方案優(yōu)化,同時(shí)建立數(shù)值模型,采用有限單元法分析工程降水的時(shí)空變化規(guī)律,對降水方案的有效性進(jìn)行預(yù)測。與傳統(tǒng)設(shè)計(jì)方法比較,每個(gè)降水區(qū)段總排水量節(jié)約6%～8%,實(shí)現(xiàn)降水目標(biāo)。模擬結(jié)果與實(shí)測結(jié)果比較,擬合良好。采用上述兩種方法相結(jié)合可以有效地實(shí)現(xiàn)施工降水優(yōu)化,是降水優(yōu)化設(shè)計(jì)的有效方法。
[Abstract]:In 1896, deep well precipitation was first used in the construction of Berlin underground railway. At present, the precipitation of well well group has become an important measure to solve the precipitation in deep foundation pit construction. The difficulty of the engineering precipitation is manifested in many uncertain factors, the precipitation design is a dynamic adjustment process. The heavy point of precipitation scheme is considered to be reasonable, effective and environmental effect. Therefore, the engineering precipitation design needs to take account of the above factors to achieve the optimal design of the scheme. Based on the above problems, this paper establishes the engineering precipitation optimization model based on the objective function method and simplex method, and realizes the goal of the minimum total drainage under the premise of ensuring the safe water level of the construction, and uses the "planning and computing" of the EXCEL software. The module realizes the rapid and flexible adjustment of the precipitation scheme, which can achieve the goal of the minimum total drainage. At the same time, the single well drainage data is obtained, and the constraint state of the scheme is evaluated. This method has flexible and rapid characteristics and is beneficial to the application of the engineering construction. The influence factors of the total drainage amount and the water level drop depth of the well well group are analyzed. Based on the Darcy law, the Biot consolidation theory and the finite single element method, the weak solution of the COMSOL Multiphysics software, based on the Darcy law, the Biot consolidation theory and the finite single element method, is obtained by the orthogonal design. The true three-dimensional full coupling seepage model is established, and the nonlinear analysis of groundwater seepage and soil settlement is carried out. In the analysis of the precipitation seepage, the first realization of the value of the drainage of the single well has been realized for the first time, and the detailed description of the change of the seepage field in the precipitation region is realized. The value model is used to analyze the temporal and spatial variation of Engineering precipitation by the finite element method, and to predict the effectiveness of the precipitation scheme. Compared with the traditional design method, the total drainage of each precipitation section is saved by 6% to 8% to realize the precipitation target. The simulation results are well compared with the measured results. The combination of the above two methods can be effectively combined. The optimization of construction precipitation is an effective way to optimize precipitation design.

【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2013
【分類號】：TU753.66

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本文編號：1894166