【摘要】：軟土具有強(qiáng)度低、壓縮性高、滲水性差等特點(diǎn)，在其上修筑公路時(shí)面臨著沉降過大與穩(wěn)定性不足等問題。砂井堆載預(yù)壓法作為排水固結(jié)的一種常用的地基處理方法，能夠有效地解決軟土地基的沉降和穩(wěn)定性問題。本文所依托工程位于煙臺(tái)市金山港地區(qū)，針對(duì)該地區(qū)軟土地基的工程性質(zhì)特點(diǎn)，選用砂井堆載預(yù)壓法對(duì)該地區(qū)軟土地基進(jìn)行處理。具體研究內(nèi)容如下： （1）根據(jù)煙臺(tái)金山港地區(qū)軟土地基的工程地質(zhì)概況，確定現(xiàn)場試驗(yàn)堆載方案及沉降觀測方案。根據(jù)現(xiàn)場監(jiān)測數(shù)據(jù)，歸納總結(jié)地基沉降變化規(guī)律并對(duì)其穩(wěn)定性進(jìn)行分析，從而有效地指導(dǎo)工程施工。 （2）對(duì)常用的軟土地基處理方法進(jìn)行概括，并對(duì)國內(nèi)外軟土固結(jié)理論及穩(wěn)定性研究現(xiàn)狀加以研究總結(jié)。 （3）用雙曲線法、指數(shù)法和星野法三種曲線擬合方法對(duì)軟土地基最終沉降量進(jìn)行預(yù)測，分析擬合結(jié)果得出：用雙曲線擬合的結(jié)果與實(shí)測值最為接近，擬合效果最好，最適合該工程，指數(shù)曲線法次之，星野法擬合的效果相對(duì)較差。 （4）借助于有限元軟件，對(duì)煙臺(tái)金山港工程實(shí)例中軟土地基的沉降與穩(wěn)定性進(jìn)行了模擬分析，，模擬結(jié)果與實(shí)測情況較吻合。并用有限元對(duì)改進(jìn)后的軟基處理方法進(jìn)行模擬分析，得出更適合該地區(qū)軟土地基的處理方法。
[Abstract]:Soft soil is characterized by low strength, high compressibility and poor water permeability. As a common foundation treatment method for drainage consolidation, sand well surcharge preloading method can effectively solve the settlement and stability problems of soft soil foundation. The project based on this paper is located in Jinshan Port area of Yantai City. According to the engineering characteristics of soft soil foundation in this area sand well loading preloading method is used to treat soft soil foundation in this area. The specific research contents are as follows: (1) according to the engineering geological situation of soft soil foundation in Jinshan Port area of Yantai the site test loading scheme and settlement observation scheme are determined. According to the field monitoring data, the variation law of foundation settlement is summarized and its stability is analyzed, which can effectively guide the construction of engineering. (2) generalize the common treatment methods of soft soil foundation. The present research situation of consolidation theory and stability of soft soil at home and abroad is summarized. (3) the final settlement of soft soil is predicted by hyperbolic method, exponential method and astrological method. The results of analysis and fitting show that the hyperbolic fitting results are most close to the measured values, the fitting effect is the best, the exponential curve method is the second, and the field method is relatively poor. (4) with the aid of the finite element software, The settlement and stability of soft soil foundation in Yantai Jinshan Port project are simulated and analyzed. The simulation results are in good agreement with the measured results. The improved soft foundation treatment method is simulated and analyzed by finite element method, and a more suitable treatment method for soft soil foundation in this area is obtained.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U416.1

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本文編號(hào)：2210415