【摘要】：水泥就地冷再生技術造價低廉、施工方便,可廣泛應用于舊路改建和大修工程。本文依托貴州省交通廳科技項目《貴州省山區(qū)公路現(xiàn)場冷再生與重復冷再生技術應用研究》,以銅仁地區(qū)和畢節(jié)地區(qū)為代表,結合銅仁S305線省道大修工程和畢節(jié)地區(qū)102省道、G326國道改擴建工程,通過室內試驗、現(xiàn)場試驗及鋪筑試驗路,對貴州一次及二次冷再生施工工藝及質量控制進行研究。通過室內試驗對兩個地區(qū)舊基層材料進行了性能分析,包括舊料級配和舊料的物理力學性能以及一次再生料級配。采用改變新添料比例和水泥劑量的試驗方案,通過擊實試驗和無側限抗壓強度試驗,分別針對兩個地區(qū)水泥再生基層混合料進行了配合比設計。研究了一次再生混合料無側限抗壓強度、劈裂強度及抗壓回彈模量的變化規(guī)律。針對銅仁地區(qū)再生基層路面工程,研究了冷再生機施工參數(shù)和碾壓工藝。通過研究WB525冷再生機轉子轉速和行進速度對一次再生料級配的影響,確定了其參數(shù)。針對兩臺20T壓路機,研究了靜壓、弱振和強振三種碾壓方式下碾壓遍數(shù)與壓實度的關系;針對普通路段和過境路段分別進行了四種碾壓方式和兩種碾壓方式的現(xiàn)場試驗,得到兩種路段的碾壓工藝。最后通過鋪筑試驗路,對一次再生施工工藝進行了驗證,同時提出了質量控制指標。針對畢節(jié)地區(qū)再生基層路面工程,對WR2500S冷再生機施工工藝及碾壓工藝進行調研,當冷再生機轉子轉速設置在110轉/min~140轉/min,行進速度設置為10 m/min~15m/min,滿足一次再生級配要求;而碾壓工藝需要進一步研究。通過一次再生試驗路,對水泥攤鋪工藝和碾壓工藝進行了優(yōu)化,得到了“22T壓路機+25T壓路機”在兩種路段的碾壓工藝,并提出了質量控制指標。通過現(xiàn)場調研,推薦二次冷再生工藝:WR2500S冷再生機轉子轉速為150轉/min~170轉/min,行進速度為3 m/min~5m/min;碾壓工藝可參考一次再生。與傳統(tǒng)施工工藝相比,水泥穩(wěn)定基層就地冷再生技術經濟效益和環(huán)境效益顯著。論文研究表明:基層施工一公里,采用就地冷再生技術降低費用20萬以上,碳排放量減少4t以上。
[Abstract]:The technology of local cold regeneration of cement is cheap and easy to construct, and can be widely used in old road reconstruction and overhaul projects. Based on the scientific and technological project of Guizhou Provincial Communications Department, "the Application of Cold Recycling and repeated Cold Recycling Technology in Guizhou Mountain Highway", represented by Tongren region and Bijie area, Combined with the overhaul project of Tongren S305 provincial road and the reconstruction and extension project of 102 provincial highway G326 in Bijie area, through indoor test, field test and paving test road, the construction technology and quality control of primary and secondary cold regeneration in Guizhou are studied. The properties of the old base materials in two regions were analyzed through laboratory tests, including the gradation of the used materials, the physical and mechanical properties of the used materials and the gradation of the primary recycled materials. Through compaction test and unconfined compressive strength test, the mix ratio design of cement recycled base mixture in two areas was carried out by changing the proportion of new material and cement dosage. The variation of unconfined compressive strength, splitting strength and modulus of compressive resilience of primary recycled mixture is studied. Based on the pavement engineering of recycled base in Tongren area, the construction parameters and rolling technology of cold regenerator are studied. The influence of rotor speed and travel speed of WB525 cold regenerator on the gradation of primary regeneration material is studied and its parameters are determined. For two 20T roller compactors, the relationship between the number of compaction times and compaction degree under three rolling modes of static compaction, weak vibration and strong vibration is studied, and the field tests of four kinds of rolling modes and two kinds of rolling methods are carried out for the common road sections and the transit road sections, respectively. The rolling process of two kinds of road sections is obtained. Finally, the primary regeneration construction technology is verified by paving the test road, and the quality control index is put forward at the same time. In view of the road surface engineering of regenerative base course in Bijie area, the construction technology and rolling technology of WR2500S cold regenerator are investigated. When the rotor speed of cold regenerator is set at 110rpm / min-140rpm / min, the traveling speed is set to 10m / min / 15m / min, which meets the requirement of primary regeneration gradation. The rolling process needs further study. Through a regenerative test road, the cement spreading process and rolling process were optimized, and the rolling process of "22T roller 25T roller" in two sections was obtained, and the quality control index was put forward. Based on field investigation, it is recommended that the rotor speed of the 10 WR2500S cold regenerator is 150 rpm / min 170 / min, and the travel speed is 3 m / min / min ~ 5 m / min; the rolling process can be referred to as primary regeneration. Compared with the traditional construction technology, the economic and environmental benefits of local cold regeneration technology of cement stabilized base are remarkable. The research results show that the cost of local cold regeneration is reduced by more than 200000 and the carbon emission is reduced by more than 4 tons for one kilometer of base course construction.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U418.6

【參考文獻】

相關期刊論文 前4條

1 孫紅烽;;薄層瀝青砼罩面在公路預防性養(yǎng)護中的應用[J];交通標準化;2012年11期

2 游張平,李自光,鄧習樹,何志勇;路面銑刨機及其發(fā)展趨勢[J];建筑機械化;2003年09期

3 徐文山,劉益民,肖烙，

本文編號：2211299