高速公路填石路堤设计与施工方法探讨

本文针对填石路提不同与土质路堤或土石混填路堤的具体特点，对填石路堤的具体要求、施工工艺、质量控制等方面提出了明确具体的规定。     

某高速公路填石路堤有无码砌边坡稳定性分析及变形监测

基于强度折减理论，结合某在建高速公路重点试验路段填石路堤有无码砌边坡，运用有限元软件建立模型，计算其水平位移变形值和边坡稳定性系数，结合现场边坡变形监测数据监测填石路堤的长期性能。     

浅谈农村道路填石路面的施工工艺及质量控制

填石路堤属于次高级路面中的一种类型,从结构层类型进行分析,主要包括砂垫层、下承层、弹石铺砌层以及基层等,不仅能够在新建的路段进行铺砌,而且还能对老路实施弹石路面铺筑。     

公路填石路基施工技术

着重探讨了公路填石路基在路基修筑过程中的应用,分析了填石路基施工技术以及施工注意事项。     

公路工程土石方路堤质量的控制措施

土石路基存在高强度、低压缩性的特点,与填筑路堤相适用。通过合理施工,土石的混合能够展现出良好的压实效果,与使用的要求相满足。对公路工程土石方路堤施工质量的控制进行简要阐述。     

公路填方路基工程量的中间计量方法

1994年5月,在深圳至汕头一级汽车专用公路东段13标段的施工过程中,由于南方公司土方队决定提前退场,因而出现对其已完成工程量进行确认计量的工作。 深汕一级汽车专用公路,路基顶宽为24.5m,路基边坡为1:2。在k287 100至k289 200路段内,路堤填高平均为3.12m,填方总量为21万m~3,挖方仅1175m~3,     

公路工程填石路基施工分析

随着经济发展水平的不断提升,我国公路事业建设水平也得到了极大的提高。主要对公路工程填石路基施工的特点、填料选择及施工技术进行了分析与探究。     

季冻区沥青混凝土路面裂缝填封工艺研究

主要阐述沥青路面非荷载裂缝填封的时机以及目前所使用的填封材料和填封工艺。裂缝填封的最佳时机是在春季的4月至5月初，这个时间也较适合填封料的使用，此时裂缝填封料的应力条件是最佳的。裂缝填封过程中需要特别注意的问题有两个：一个是对裂缝壁面的清理和干燥，另一个是要求填封材料从底部向上填装，避免有气泡出现，影响填封修补质量。     

五星水库软土路基处治措施探讨

通过对五星水库软土路基处治措施的探讨，提出了在工期紧、路堤高、软土层厚的施工条件下．以塑料排水板排水加固为主．兼反压护道、土工格栅等相结合的综合处治方案．满足了路堤的沉降、稳定及工期要求，体现了较好的技术经济性。     

填石路基边坡防护形式及经济性分析

边坡作为高速公路的重要防护形式,其稳定性与安全性决定了高速公路的服役寿命.为减少填石路基边坡病害,通过介绍喷播植草防护及人字型骨架植草防护关键技术,并从工效、经济、安全等角度对边坡码砌防护形式进行对比分析,提出了喷播植草边坡优选为填石路基的边坡防护形式,为依托工程提供了技术保障措施.     

现场监测数据分析湿地软土地基的稳定性

文中根据工程实例,利用监测数据,采用规范法和拐点法详细地分析了经过处理后的软土地基在路堤填土分级加载过程中的稳定性.通过两种方法的对比分析得出一致的结论,即湿地软土地基在路堤填土分级加载过程中是稳定的,而且是与工程实际相符的.有效地控制了施工加载过程和指导施工,为今后湿地软土地基稳定性控制提供参考.     

特殊路段填方施工简介

填方是路基的一种基本形式,其质量关系到整条道路的质量,不同路段填方应采取不同的处理措施,以保证其强度。     

林区公路软土地基稳定与沉降浅析

本文通过对林区公路天然软土地基稳定与沉降的计算、分析,阐明了路基在填筑过程中及完工后的稳定情况,选择合理的填筑速度和稳定加固措施,从而保证路堤在施工过程中和完工后的稳定.     

基于PLAXIS的新旧路基结合部台阶开挖方案的有限元分析

在旧路加宽改造过程中,新旧路基结合部容易产生较大的差异变形,导致路面结构的破坏,并降低路堤的稳定性。为了减小结合部的工后差异沉降,运用PLAXIS有限元软件对旧路加宽施工过程中台阶的开挖方案进行数值模拟分析,计算各种开挖方案下新旧路基的差异沉降,提出合理的施工方案。计算结果表明:卸载及加载量越大,新、旧路基在结合部的横向和竖向差异变形也越大,旧路加宽改造时优先选用方式2和方式4这两种台阶开挖方式。     

风景区道路线形设计的探讨

以太阳岛围堤路改扩建工程设计为例,介绍了风景区道路线形设计的方法,提出了在设计中要遵循的原则和需要注意的一些事项,突出线形设计同景观相结合的设计思路,在风景区道路线形设计等方面做了一些探索。     

How does organic matter affect the physical and mechanical properties of forest soil?

Determining the physical and mechanical properties of soil and its behavior for engineering projects is essential for road construction operations. One of the most important principles in forest road construction, which is usually neglected, is to avoid mixing organic matter with road materials during excavation and embankment construction. The current study aimed to assess the influence of organic matter on the physical properties and mechanical behaviors of forest soil and to analyze the relation between the amount of organic matter and the behavior of forest soil as road material. A typical soil sample from the study area was collected beside a newly constructed roadbed. The soil was mixed with different percentages of organic matter(control treatment, 5, 10, and 15% by mass) and different tests including Atterberg limits, standard compaction, and California bearing ratio(CBR) tests were conducted on these different soil mixtures. The results showed that soil plasticity increased linearly with increasing organic matter.Increasing the organic matter from 0%(control) to 15%resulted in an increase of 11.64% of the plastic limit and 15.22% of the liquid limit after drying at 110 ℃. Also,increasing the organic matter content reduced the soil maximum dry density and increased the optimum moisture content. Increasing the organic matter from 0 to 15% resulted in an increase of 11.0% of the optimum moisture content and a decrease of 0.29 g/cm~3 of the maximum dry density. Organic matter decreased the CBR, which is used as the index of road strength. Adding 15% organic matter to the soil resulted in a decrease of the CBR from 15.72 to 4.75%. There was a significant difference between the two drying temperatures(60 and 110 ℃) for the same organic matter mixtures with lower water content values after drying at 60 ℃. The results revealed the adverse influence of organic matter on soil engineering properties and showed the importance of organic matter removal before excavation and fill construction.     

浅谈CFG桩地基处理及工程实例

水泥搅拌桩复合地基处治深厚层软土能够有效减少路堤工后沉降,增加路基稳定,提高地基承载力,施工快速方便。90年代以来在我国公路工程软基处理中得到广泛应用。但越来越多的工程实践表明该方法加固有机质含量较高的地基效果不明显,水泥土强度一般较低,往往达不到设计要求。     

宝鸡市渭河流域绿化治理探讨

本文通过对渭河宝鸡段的实地考察,因地制宜地制定了渭河沿岸堤顶公路景观长廊、沿岸护堤林带、河道绿地公园、两岸直观坡面、两岸近村、镇、厂矿5种绿化治理方案,并选择了造林树种和配置方法,提出了相应的技术措施。     

Forest road design with soil sediment evaluation using a high-resolution DEM

In this study, we combined a program to optimize forest road alignments with a method for prediction of surface erosion and related sediment delivered to streams. Combining the forest road design program with the high-resolution digital elevation model made it possible to estimate soil sediment based on a standard methodology, because a relatively accurate road prism could be generated. The combined program properly places and spaces drainage structures based on the Washington State Forest practice board manual. We applied the program to a part of Capitol State Forest in Washington State and optimized horizontal and vertical alignments while estimating movement of soil sediment from roads to streams. We discussed the effects of road surface materials, near-stream culvert distance to stream, and out-sloped forest road template on total road costs and soil sediment delivered to streams. Using lower quality rock surfacing reduced total costs, but the amount of soil sediment from lower quality rock surfacing was 1.5 times more than that on a higher quality rock traction surface. Therefore, lower quality rock surfacing should not be used near the stream. The placement of near-stream culverts 15 m upstream and out-sloped road template were examined using a traction surface on 15-m sections upstream and lower quality rock surfacing on other sections in order to reduce soil sediments to the stream and total costs. As a result, placing near-stream culverts 15 m upstream and using an out-sloped road template significantly reduced total road cost and soil sediment. Finally, we optimized horizontal and vertical alignments while limiting soil sediment to a specified maximum level. The model successfully optimized forest road alignments, which reduced total road cost as well as soil sediment.     

煤矸石在高等级公路施工中的质量控制

结合依七高速公路,详细阐述了煤矸石在高等级公路施工中质量控制及施工方法,煤矸石废物利用起到的环保效果和社会效应。