發(fā)布時(shí)間：2018-08-04 15:09

【摘要】：為了研究山西地區(qū)黃土地區(qū)路基加州承載比CBR和路基回彈模量E0之間的關(guān)系,本文首先通過(guò)對(duì)山西9種典型土樣進(jìn)行液塑限、比重及顆粒分析等物理性質(zhì)試驗(yàn),得出了山西黃土地區(qū)土質(zhì)為級(jí)配不良土且以粉土為主。再此基礎(chǔ)上選取山西3個(gè)典型路段(山平高速試驗(yàn)路段、廣源高速試驗(yàn)路段、河運(yùn)高速試驗(yàn)路段)進(jìn)行現(xiàn)場(chǎng)CBR和回彈模量試驗(yàn),對(duì)結(jié)果進(jìn)行歸納研究,得到山西典型黃土地區(qū)E0、CBR、壓實(shí)度K和含水率w之間的關(guān)系。最后通過(guò)室內(nèi)試驗(yàn)分析了黃土成分、含水率、浸水時(shí)間和成型方式對(duì)CBR的影響,得出回彈模量、浸水CBR和不浸水CBR都是隨著黃土密實(shí)程度的提高而提高;在一定水分含量條件下,回彈模量是隨著水分含量的提高而降低;在擊實(shí)成型條件下,干燥CBR隨著含水率的提高而降低,浸水CBR隨著含水率的提高,先減小后升高;在靜壓成型實(shí)驗(yàn)中,浸水CBR是根據(jù)水分含量的提高先降低后升高。
[Abstract]:In order to study the relationship between the California bearing ratio (CBR) of roadbed and the modulus of resilience (E0) of roadbed in loess region of Shanxi Province, the physical properties of nine typical soil samples in Shanxi Province, such as liquid-plastic limit, specific gravity and particle analysis, are tested in this paper. It is concluded that the soil quality of Shanxi loess area is poor gradation and silt is the main soil. On this basis, three typical sections of Shanxi Province (Shanping High Speed Test Section, Guangyuan High-Speed Test Section, River High-speed Test Section) were selected to carry out field CBR and resilient modulus tests, and the results were summarized and studied. The relationships among CBR, compactness K and water content w in typical loess area of Shanxi Province are obtained. Finally, the effects of loess composition, moisture content, soaking time and forming method on CBR are analyzed. The results show that the modulus of springback, soaking CBR and non-soaking CBR all increase with the increase of loess compactness. Under certain moisture content, the springback modulus decreases with the increase of moisture content, while the dry CBR decreases with the increase of moisture content, and the CBR decreases with the increase of moisture content, and then increases with the increase of moisture content. In the experiment of hydrostatic molding, the content of CBR decreased firstly and then increased according to the increase of water content.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U416.1

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