發(fā)布時間：2018-10-22 12:50

【摘要】：近年來,天津南港工業(yè)區(qū)的建設速度加快,圍海造地已成為該地區(qū)補充土地資源主要途徑。但是,通過吹填圍埝造陸形成的地基由于其強度低,在短期內(nèi)很難滿足工程需要。因此,本文以天津南港工業(yè)區(qū)吹填土為研究對象,以現(xiàn)場地質勘察、現(xiàn)場試驗、測試以及理論分析相結合為主要研究手段,以真空預壓加固軟基機理為研究主線,以吹填土的快速處理為研究目標,調查和收集了天津南港工業(yè)區(qū)軟土的工程地質資料,并對軟基處理現(xiàn)場地質勘察資料進行數(shù)理分析、歸納和總結,在此基礎上分析和研究真空預壓法在天津南港工業(yè)區(qū)軟基處理中的應用,得出了以下主要研究成果：(1)以天津南港工業(yè)區(qū)西北部造陸區(qū)軟基處理為工程背景,通過收集資料和調研,分析天津南港地區(qū)軟粘土工程特性和軟基加固方法,對地基采用真空預壓法的設計和施工進行評價。(2)根據(jù)地質勘查資料,制定合理的真空預壓加固設計方案和監(jiān)測方案,分別監(jiān)測不同加固塊區(qū)現(xiàn)場膜下真空度、孔隙水壓力、地下水位、地面沉降、分層沉降、側向位移等。(3)通過對真空預壓處理過程中的各項指標動態(tài)監(jiān)測得到詳細的監(jiān)測數(shù)據(jù),整理得到的監(jiān)測數(shù)據(jù)并加以分析,表明真空預壓法對在天津南港工業(yè)區(qū)具有良好的加固效果。對比加固前和加固后土體進行的試驗數(shù)據(jù),得到的各項指標以及強度有很大的改善。(4)通過分析在軟土地基加固工程中真空預壓法對地表沉降、孔隙水壓力、深層側向位移等方面的影響,真空預壓法在軟土地基加固工程中具有廣泛的適用性及可行性。
[Abstract]:In recent years, the construction of Nangang Industrial Zone in Tianjin has been accelerated, and reclamation has become the main way to replenish the land resources in this area. However, because of its low strength, it is difficult to meet the engineering needs in the short term. Therefore, this paper takes the filling soil in Nangang Industrial Zone of Tianjin as the research object, takes the field geological survey, field test, test and theoretical analysis as the main research means, and takes the mechanism of strengthening soft foundation under vacuum preloading as the main line of study. In this paper, the engineering geological data of soft soil in Nangang Industrial Zone of Tianjin are investigated and collected, and the geological survey data of soft foundation treatment site are analyzed, summarized and summarized. On this basis, the application of vacuum preloading method in soft foundation treatment of Nangang Industrial Zone in Tianjin is analyzed and studied. The main research results are as follows: (1) the engineering background is soft foundation treatment in the northwest of Nangang Industrial Zone, Tianjin. Through collecting data and investigating, analyzing the engineering characteristics of soft clay and strengthening method of soft foundation in Nangang area of Tianjin, the design and construction of foundation with vacuum preloading method are evaluated. (2) according to the data of geological exploration, A reasonable design scheme and monitoring scheme for vacuum preloading reinforcement are made to monitor the vacuum degree, pore water pressure, groundwater level, land subsidence and stratified settlement in different consolidation blocks, respectively. (3) the detailed monitoring data are obtained by dynamic monitoring of each index in the process of vacuum preloading, and the monitoring data are sorted out and analyzed. The results show that the vacuum preloading method has a good effect on the reinforcement of Nangang Industrial Zone in Tianjin. Compared with the test data before and after reinforcement, the indexes and strength obtained are greatly improved. (4) through the analysis of the vacuum preloading method in the soft soil foundation strengthening project, the surface settlement, pore water pressure, pore water pressure, Because of the influence of deep lateral displacement, the vacuum preloading method has wide applicability and feasibility in soft soil foundation reinforcement.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU472.33

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