谈绿色加筋格宾网技术在机场边坡防护中的应用

以某机场边坡采用绿色加筋格宾网施工技术为例,介绍了绿色加筋格宾网技术在机场边坡防护中的施工方案及施工措施,阐述了绿色加筋格宾网技术应用在机场工程边坡防护施工时存在的优点。     

格宾挡土墙在公路路基边坡滑塌防护施工中的应用

为研究格宾挡土墙在高速公路路基边坡滑塌防护施工中的应用,论文结合某项目实例,对格宾挡土墙的施工准备工作、施工技术方法、质量控制和安全控制进行了简单的介绍,明确了该项技术的关键点,为将来格宾挡土墙在高速公路路基边坡的滑塌防护施工技术推广创造了条件。     

格宾箱笼的施工技术

介绍溪洛渡水电站对外交通专用公路B标段。路基边坡下金沙江河岸边坡用格宾箱笼防护的措施。阐述了格宾箱茏防护的概念及施工方法．强调了格宾箱笼防护对生态环境的保护作用。     

加筋格宾挡土墙的施工优点及工艺控制

就闻垣高速公路加筋格宾挡土墙施工实践,从加筋格宾挡土墙施工准备、施工工艺及质量控制点等方面,浅谈加筋格宾挡土墙的施工技术及相关注意事项,为今后同类项目施工积累了宝贵经验。     

格宾网挡墙在某堤防工程中的应用

重庆市巴南区长江防洪护岸综合整治二期工程(外河坪段)采用格宾网挡墙进行滨江路堤防支护.格宾网挡墙具有适应性强、透水能力强、结构整体性强、施工方便易组合、耐久性好、造价低等特点.针对格宾网挡墙施工难点,介绍格宾网挡墙制作技术、施工工艺流程以及施工过程中组装控制质量管理.并对格宾网挡墙的面板出现受压鼓出等特殊情况处理进行了探导.结果表明,工程质量满足设计、规范要求.     

格宾网石笼护岸在塔里木河中游河道治理中的设计及应用

格宾网护坡形式施工方法简,可以在塔里木河中下游推广应用。论文单通过格宾网石笼护坡在塔里木河中游河段治理工程中的应用,探讨了其设计及施工方法的应用要点。     

谈格宾石笼在新疆伊犁河口防护工程中的应用

结合新疆伊犁河口防护工程实例,对格宾笼防护工程的结构特点作了介绍,主要研究了格宾石笼护坡的设计参数,并从基础处理、土工布铺设、格宾笼组装等方面阐述了具体的施工要求,以充分发挥该技术的优势。     

谈加筋格宾挡土墙的施工技术

结合闻垣高速公路LB1项目工程实例,主要介绍了高速公路加筋格宾挡墙施工技术原理及特点,采用该技术能够有效提高路基结构的整体性与牢固性,将该技术成功地应用于闻垣高速公路挡墙施工中,取得了良好的施工效果,对其他同类型的挡墙施工具有较高的参考价值。     

格宾加筋挡土墙施工技术分析

以重庆巫山民用机场项目飞行区场道工程四标段边坡防护工程为例,从格宾加筋挡土墙施工切入,具体介绍格宾加筋挡土墙施工工艺流程,并分析施工的细节。经过边坡防护工程施工现场建设情况表明,该工程采用的施工工艺、施工方法非常贴合该工程现场实际,既保证了边坡防护的施工质量,也保护了周边自然环境,可为机场防护工程建设提供参考指引。     

绿色格宾挡墙在边坡防护中的应用及效果评价

为保证边坡在施工期及运营期的稳定性,通常采用防护工程以提高边坡稳定性,本文介绍了公路工程中边坡防护常用的几种类型,着重研究了格宾挡墙在边坡防护中的应用,并采用有限元软件ANSYS对格宾挡墙防护效果进行评价,研究结果表明:绿色格宾挡墙不仅能与道路工程周边环境相协调,起到美化道路景观的作用,而且能大大提高边坡整体稳定性,同时格宾挡墙能有效减小边坡变形。     

格宾护垫式护坡施工技术开发与应用

介绍了格宾护垫式护坡施工技术，具有透水性能好、经久耐用、利于植被生长等优点，抗变形能力相对传统砌筑式方法施工的护坡抗毁损能力大为提高。格宾护垫式护坡施工效率高，植被成活率高，易形成绿化生态网带，能有效防止护坡护堤的水土流失，保证了护堤的质量，又促进了环境保护及美化，具有较好的环保、技术、经济及社会等综合效益。     

绿色加筋格宾组合结构在市政工程的应用

结合湖南长沙创远集团开发的"湘江一号"别墅楼盘加筋格宾组合式挡墙工程实例,阐述了绿色加筋格宾组合式新型支挡结构的设计理论和计算方法。在设计计算中,提出了该组合结构的外部和内部稳定验算的公式和方法,并得出计算结果,评价是安全的。最后比较了组合式结构的优势,说明了在市政工程边坡防护中的应用价值。     

浅谈格宾网箱护垫施工工艺

主要介绍格宾网箱护垫及施工工艺,以达到提高工效,保证施工质量的目的,其经验可供同行施工人员参考。     

谈格宾网加筋挡土墙施工技术

结合工程实践,对格宾网加筋挡土墙的施工工艺及质量控制等问题进行了探讨,经实践证明该施工技术的实施取得了良好的社会、经济效益,对同类工程施工具有指导意义。     

柔性石笼挡墙变形受力的PFC2D数值模拟

石笼挡墙作为一种新型的挡土结构,在国内的应用还不够多,同时在已建或待建的挡土工程中,也出现了传统的挡土结构很难解决的情况,文章针对这种状况,引入了石笼挡墙这种柔性构筑物,并建立了石笼挡墙的PFC2D模型,从对墙面侧向位移的量测中,提出了行车荷载对挡墙的影响深度,研究了石笼墙背土压力,对回填土的受力特性划分了5个阶段,阐明了经过初期的荷载作用,挡墙与回填土的共同体达到了平衡状态,分析了挡墙墙背的侧向位移,指出了这种柔性结构能很好地消散土压力的作用.     

水平地震作用下加筋格宾挡土墙动力特性试验研究

通过大型的模型试验,研究了以红砂岩为填料在水平地震作用下加筋格宾挡土墙的动力特性。双绞合六边形金属格宾网由PVC包裹,并镀锌防腐,网面单元尺寸为80 mm×100 mm。输入地震波采用ELCE_NS地震波和HACHI_EW地震波,峰值分别为0.342g和0.183g。试验得出了加筋格宾挡墙在不同峰值的水平地震激励下的第一层、第三层、第五层墙顶面处的水平加速度、竖向加速度、水平动位移、竖向动位移峰值响应和沿墙高方向动应力峰值响应。通过对加筋格宾挡土墙的结构分析和抗震试验,可以得出加筋格宾挡土墙为优良的抗震结构,这为加筋格宾挡土墙的抗震设计提供依据。     

Pullout characteristics and conceptual model of gabion reinforcement

The reinforced gabion wall on the west line of Xiangtan to Hengyang highway in Hunan province was studied with the large scale pullout model tests and numerical simulations to obtain the interface friction characteristics between the double twisted hexagonal gabion mesh(2.2 mm and 2.7 mm respectively) and red sandstone. The experimental results showed that the pullout displacement-shear stress curve could be roughly divided into 3 sections:the rapid growth,the steady progression and the yielding sections. The thinner gabion mesh led to the higher peak shear stress,larger cohesion and friction angle under the same normal stress. The pullout displacement-shear stress curve from the numerical simulation had two sections,namely,the rapid growth of shear stress and the yielding of gabion mesh. Under the same conditions,the 2.2 mm meshes resulted in the larger drawing coefficient and pseudo-friction coefficient and thus presented the better interface friction properties. The conceptual model suggested that the proportion of pullout force shared by the horizontal bars and longitudinal bars relied on the magnitude,the length,the coefficient of earth pressure and the friction factor,etc. The pullout bearing resistance on the transversal bars(T_1) comprises the largest proportion of the total resistance(about 62%–72%),on the other hand,the proportions of the annular pullout friction on the longitudinal bars(T_2) and the interface friction acting on the surfaces of all nodes(T_3) both grow against T_1 when the normal stress increases.     

地震作用下柔性挡墙变形特征分析

为研究柔性挡墙的地震动力响应及变形特征,开展格宾加筋挡墙与生态加筋挡墙的大型振动台模型试验。研究结果表明:在地震作用下,2种柔性挡墙受到的峰值动土压力沿墙高呈现中间小两端大的分布特征,这与混凝土刚性挡墙峰值动土压力的分布规律恰好相反。由于格宾加筋挡墙和生态加筋挡墙的面墙在地震作用下发生鼓胀变形,导致其相应部位的动土压力远小于混凝土挡墙的动土压力。国内现行规范因未考虑柔性挡墙变形后的地震土压力衰减效应,据此进行柔性挡墙的抗震设计将偏于保守。通过分析认为,对于格宾加筋挡墙和生态加筋挡墙这类面墙刚度较小的柔性挡墙的抗震设计,应在保证挡墙地震稳定性的前提下,对地震土压力做适当的折减以节约工程造价。对于铁路及高等级公路柔性挡墙的抗震设计,除要保证其整体稳定性外,还需控制墙体的局部变形量,改善填料的工程特性和增加面墙材料的弹性模量以及加厚墙体均可以减小挡墙在地震作用下的变形量。     

Effectiveness of filter gabions against slope failure due to heavy rainfall

Slope failures due to heavy rainfall events are phenomena that can cause serious damage to social infrastructures and the loss of lives. Based on previous studies, natural slope failures are generally shallow and originate at the slope toe where infiltrated rainwater has accumulated and saturated it. Hence, it is extremely important to prevent these initial failures from inducing entire slope failures. In the present study, firstly, 1 g model tests, called G series tests, were conducted. In the tests, a gabion filled with filter materials was placed at the slope toe of each model for reinforcement and to drain the accumulated rainwater from the slope toe. Filter gabions have been found to shrink the failure regions and to significantly extend the time until slope failures occur. The failure mechanism in the G series tests was almost similar to that in cases without filter gabions if focus was placed on the slope above the filter gabions. However, the drainage effect was small. Secondly, P series tests, in which a filter gabion with a pipe was introduced for each model, were conducted. The results of these tests indicated that the displacements significantly decreased as the diameter of the pipe and the depth of the pipe’s insertion to the surface layer increased. Water did not discharge through the pipe until the pore water pressure around the pipe reached positive values. The failures always started when a phreatic surface appeared on the slope surface. Thus, it is very important to prevent a phreatic surface from forming on the slope surface. The adequate arrangement of a filter gabion with a drainage pipe may increase the potential for slope stability.