【摘要】：壓實(shí)是道路建設(shè)非常重要的過程,被壓實(shí)材料需要壓實(shí)以確保路基承載能力、穩(wěn)定性和強(qiáng)度。在施工過程中壓實(shí)不足會(huì)引起道路滲水、車轍、開裂等;過壓實(shí)會(huì)引起被壓實(shí)材料遭到破壞。為了保證道路有良好的壓實(shí)質(zhì)量,在施工中必須嚴(yán)格控制路基壓實(shí)質(zhì)量,因此需要選擇合適的壓實(shí)質(zhì)量評(píng)價(jià)指標(biāo)和檢測(cè)方法對(duì)壓實(shí)路基進(jìn)行質(zhì)量控制。本文采用理論分析并結(jié)合相關(guān)試驗(yàn)的研究方法,歸納了一些壓實(shí)質(zhì)量物理評(píng)價(jià)指標(biāo)——壓實(shí)度、孔隙率、空氣體積率、相對(duì)密度等,壓實(shí)質(zhì)量力學(xué)評(píng)價(jià)指標(biāo)——?jiǎng)討B(tài)變形模量、塑性變形增量、地基系數(shù)30K、承載比等,分析了壓實(shí)質(zhì)量物理評(píng)價(jià)指標(biāo)之間的相關(guān)性,壓實(shí)質(zhì)量力學(xué)評(píng)價(jià)指標(biāo)之間相關(guān)性,以及壓實(shí)質(zhì)量物理評(píng)價(jià)指標(biāo)和力學(xué)評(píng)價(jià)指標(biāo)之間的相關(guān)性。通過分析可以看出壓實(shí)質(zhì)量評(píng)價(jià)指標(biāo)之間存在一定的相關(guān)性,因此,在壓實(shí)施工中,應(yīng)該根據(jù)壓實(shí)材料的特性、施工工況合理的選擇壓實(shí)質(zhì)量評(píng)價(jià)指標(biāo)及檢測(cè)方法,保證施工質(zhì)量,提高施工效率。針對(duì)常用的壓實(shí)質(zhì)量評(píng)價(jià)指標(biāo)——壓實(shí)度及其檢測(cè)技術(shù)介紹了一些傳統(tǒng)檢測(cè)方法,針對(duì)這些檢測(cè)方法的局限性,重點(diǎn)說明了智能壓實(shí)檢測(cè)的優(yōu)勢(shì)及其各廠家和單位常用的智能壓實(shí)檢測(cè)指標(biāo),為工程施工人員選擇合適的壓實(shí)質(zhì)量檢測(cè)方法提供參考。針對(duì)實(shí)驗(yàn)室級(jí)配土路基進(jìn)行低幅和高幅壓實(shí)試驗(yàn),對(duì)試驗(yàn)數(shù)據(jù)壓實(shí)度、累積沉降量進(jìn)行分析,提出了壓實(shí)度與累積沉降量雙指標(biāo)控制級(jí)配土路基的壓實(shí)質(zhì)量;試驗(yàn)中還采集了不同壓實(shí)遍數(shù)下不同深度的土壓力信號(hào),通過對(duì)土壓力信號(hào)進(jìn)行分析,得出了土壓力可以作為壓實(shí)質(zhì)量評(píng)價(jià)的一種指標(biāo),為振動(dòng)輪工作狀態(tài)的監(jiān)測(cè)和被壓實(shí)材料的密實(shí)度評(píng)估提供了一種新的檢測(cè)手段。
[Abstract]:Compaction is a very important process in road construction. Compaction materials need to be compacted to ensure the bearing capacity, stability and strength of roadbed. During construction, insufficient compaction will cause road seepage, rutting and cracking, and over-compaction will lead to the destruction of compacted materials. In order to ensure the good compaction quality of road, the compaction quality of roadbed must be strictly controlled in construction, so it is necessary to select appropriate evaluation index and testing method to control the quality of compacted roadbed. In this paper, some physical evaluation indexes of compaction quality, such as compactness, porosity, air volume ratio, relative density and dynamic deformation modulus, are summarized by means of theoretical analysis and related test. Plastic deformation increment, foundation coefficient 30K, bearing ratio, etc., the correlation of physical evaluation index of compaction quality and the correlation of mechanical evaluation index of compaction quality are analyzed. And the correlation between physical evaluation index of compaction quality and mechanical evaluation index. Through the analysis, we can see that there is a certain correlation between the evaluation index of compaction quality, therefore, in the compaction construction, according to the characteristics of compaction material, the evaluation index and testing method of compaction quality should be reasonably selected. Ensure construction quality and improve construction efficiency. In this paper, some traditional testing methods are introduced for compaction degree and its testing technology, and the limitations of these methods are pointed out. The advantages of intelligent compaction testing and the commonly used intelligent compaction testing indexes of various manufacturers and units are emphatically explained, which provides a reference for engineering construction personnel to select suitable compaction quality testing methods. Based on the low amplitude and high amplitude compaction tests of laboratory graded subgrade, the compaction degree and cumulative settlement of test data are analyzed, and the compaction quality of graded subgrade is controlled by both compactness and cumulative settlement. In the experiment, the earth pressure signals of different depth under different compaction times are collected, and through the analysis of the earth pressure signals, it is concluded that the earth pressure can be used as an index of compaction quality evaluation. It provides a new method for monitoring the working condition of vibration wheel and evaluating the compaction degree of compacted material.
【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】：2015
【分類號(hào)】：U416.1

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本文編號(hào)：2287147