Pavements of airport runway and apron are subjected to stern stresses imposed by landing and ground movements of aircraft. The stresses are primarily concentrated in touchdown zone and wheel path areas of the pavement...Pavements of airport runway and apron are subjected to stern stresses imposed by landing and ground movements of aircraft. The stresses are primarily concentrated in touchdown zone and wheel path areas of the pavement structure. This paper proposes that this area can be designed using geosynthetic layer reinforcement to minimise deflection and deterioration of the structure. The reinforcement can reduce the vertical stresses on the underground fuel pipes in the apron area, if used. The concept of ditch conduit reinforcement is suggested where a geosynthetic layer is used within a soil backfill to redistribute load over a conduit leading to stress redistribution. It is observed that the vertical load is significantly reduced by the arching action of the soil mass overlying the conduit. The load can be reduced further by placing a geosynthetic reinforcement layer within the soil backfill above the conduit. It is suggested that the inclusion of a geosynthetic layer in the granular backfill reduces the vertical load on a ditch conduit and the amount of reduction depends upon the tensile modulus, deflection of the geosynthetic and soil arching action. This leads to believe that a reinforced pavement structure for runway and aerodrome apron area improves the load carrying capacity of the pavement to sustain the operations of heavy transport aircraft, including occasional overloading of the pavement. Hence, this paper explores a possibility of using a geosynthetic layer under the runway pavement to provide reinforcement.展开更多
在对国内外航空产品失效案例进行收集和整理的基础上,设计和开发了基于客户机/服务器(C/S)体系结构的航空产品失效案例共享系统。该系统由客户端程序、应用服务器程序以及后台数据库三部分组成,采用SQL Server 2000作为数据库管理系统,...在对国内外航空产品失效案例进行收集和整理的基础上,设计和开发了基于客户机/服务器(C/S)体系结构的航空产品失效案例共享系统。该系统由客户端程序、应用服务器程序以及后台数据库三部分组成,采用SQL Server 2000作为数据库管理系统,采用VC++作为客户端程序和应用服务器程序的开发工具。对系统体系结构、功能模块、工作流程及技术特点进行了阐述。展开更多
文摘Pavements of airport runway and apron are subjected to stern stresses imposed by landing and ground movements of aircraft. The stresses are primarily concentrated in touchdown zone and wheel path areas of the pavement structure. This paper proposes that this area can be designed using geosynthetic layer reinforcement to minimise deflection and deterioration of the structure. The reinforcement can reduce the vertical stresses on the underground fuel pipes in the apron area, if used. The concept of ditch conduit reinforcement is suggested where a geosynthetic layer is used within a soil backfill to redistribute load over a conduit leading to stress redistribution. It is observed that the vertical load is significantly reduced by the arching action of the soil mass overlying the conduit. The load can be reduced further by placing a geosynthetic reinforcement layer within the soil backfill above the conduit. It is suggested that the inclusion of a geosynthetic layer in the granular backfill reduces the vertical load on a ditch conduit and the amount of reduction depends upon the tensile modulus, deflection of the geosynthetic and soil arching action. This leads to believe that a reinforced pavement structure for runway and aerodrome apron area improves the load carrying capacity of the pavement to sustain the operations of heavy transport aircraft, including occasional overloading of the pavement. Hence, this paper explores a possibility of using a geosynthetic layer under the runway pavement to provide reinforcement.
文摘在对国内外航空产品失效案例进行收集和整理的基础上,设计和开发了基于客户机/服务器(C/S)体系结构的航空产品失效案例共享系统。该系统由客户端程序、应用服务器程序以及后台数据库三部分组成,采用SQL Server 2000作为数据库管理系统,采用VC++作为客户端程序和应用服务器程序的开发工具。对系统体系结构、功能模块、工作流程及技术特点进行了阐述。
