【摘要】：近些年來,港口工程建設(shè)進(jìn)入快速發(fā)展新時(shí)期,隨之而來的大面積吹填造陸工程越來越多。由于各港區(qū)吹填土的工程性質(zhì)差別很大且研究不系統(tǒng)不完善,吹填土的處理方法逐漸成為新港建設(shè)的突出問題。吹填土處理方法選擇不當(dāng),輕則導(dǎo)致工程返工,浪費(fèi)人力、財(cái)力,延緩工期,重則導(dǎo)致安全事故,給人們的生命帶來威脅。為此,吹填土性質(zhì)的研究及處理方法和工藝的研究逐漸成為學(xué)者和工程技術(shù)人員研究熱點(diǎn)問題。本文將結(jié)合天津欠固結(jié)吹填土真空預(yù)壓處理某工程,在前人研究的基礎(chǔ)上,通過室內(nèi)試驗(yàn),原位測(cè)試、現(xiàn)場(chǎng)檢測(cè),并結(jié)合數(shù)值計(jì)算軟件對(duì)真空預(yù)壓處理欠固結(jié)淤泥的過程和效果進(jìn)行研究。其主要研究?jī)?nèi)容包括以下幾個(gè)方面:1.通過顆粒分析試驗(yàn)、X光衍射試驗(yàn)、原位測(cè)試及室內(nèi)試驗(yàn)詳細(xì)的研究了天津某吹填土真空預(yù)壓加固區(qū)土體的顆粒組成、礦物組成、力學(xué)特性、滲透固結(jié)特性等工程特性;2.通過現(xiàn)場(chǎng)埋設(shè)監(jiān)測(cè)儀器,對(duì)真空預(yù)壓過程進(jìn)行跟蹤監(jiān)測(cè),分析了在處理欠固結(jié)吹填土過程中真空度、孔隙水壓力、沉降、水平位移及地下水位的變化情況。3.利用土體應(yīng)力應(yīng)變的雙曲線關(guān)系和e-p曲線,得到了欠固結(jié)吹填土最終沉降計(jì)算公式,并將不考慮側(cè)向變形、考慮側(cè)向變形及簡(jiǎn)化方法與實(shí)測(cè)數(shù)據(jù)進(jìn)行了對(duì)比。對(duì)比結(jié)果表明前兩種方法與實(shí)測(cè)結(jié)果較為吻合。4.利用數(shù)值計(jì)算軟件,對(duì)比了現(xiàn)場(chǎng)實(shí)測(cè)數(shù)據(jù)與計(jì)算結(jié)果的一致性,并結(jié)合實(shí)際施工情況簡(jiǎn)單分析了兩者存在偏差的原因。
[Abstract]:In recent years, port engineering construction has entered a new period of rapid development, followed by a large area of land filling projects more and more. Due to the great difference of engineering properties and the imperfection of research on the engineering properties of the dredged soil in each port area, the treatment method of the dredging soil has gradually become a prominent problem in the construction of Newport. Improper selection of fill treatment method will lead to engineering rework, waste of manpower, financial resources, delay construction period, heavy lead to safety accidents, and bring threat to people's lives. Therefore, the research on the properties of the soil and the treatment methods and processes has gradually become a hot issue for scholars and engineers. In this paper, a project of vacuum preloading treatment of underconsolidated fill in Tianjin will be combined. Based on the previous research, through indoor test, in-situ test, field test, The process and effect of vacuum preloading for the treatment of underconsolidated silt were studied with numerical calculation software. The main research contents include the following aspects: 1. Through particle analysis test, X-ray diffraction test, in-situ test and laboratory test, the particle composition, mineral composition, mechanical properties, permeability and consolidation characteristics of soil mass in the vacuum preloading area of a Tianjin blow fill are studied in detail. 2. The vacuum degree, pore water pressure, settlement, horizontal displacement and groundwater level in the treatment of underconsolidated blow fill are analyzed. By using the hyperbolic relation of soil stress and strain and e-p curve, the final settlement calculation formula of underconsolidated blow fill is obtained, and the calculation formula is compared with the measured data without considering lateral deformation, considering lateral deformation and simplifying the method. The comparison results show that the former two methods are in good agreement with the measured results. By using the numerical calculation software, the consistency between the field measured data and the calculated results is compared, and the reasons for the deviation between the two are simply analyzed in combination with the actual construction conditions.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U655.54

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本文編號(hào)：2275114