Wind-break walls along Lanxin High-Speed Railway II were studied and approved as effective measures to reduce strong wind damage the high-speed trains. The results show that sand sedimentation on leeward sides of wind-break railway within Gobi Desert could significantly threaten operation safety running Different from current prevention without adequate consideration deposition process airborne...

The smoothness of high-speed railway is extremely strict. As an important part the foundation, subgrade structure has strict deformation requirements. It necessary to ensure that does not have plastic cumulative under long-term cyclic load train, which most critical geodynamic problem in subgrade. This paper studied characteristics filling train loading through triaxial test, three types accumu...

Fall 2013 • Vol. 25 • No. 2 The exceptional fatigue and rutting resistance observed in section N7 made HiMA the material of choice in rehabilitating a nearby pavement test section that was completely failed. Oklahoma’s section N8 has a soft subgrade representative of native Oklahoma soil. The section was originally constructed in 2006 with 10 inches of asphalt over a stiff soil base, simulating...

This paper proposes a comprehensive method for the compaction uniformity evaluation of subgrade in highways based on principle components analysis and BP neural network. A field test resilient Young’s moduli during is performed Zun-Qin highway. The representing are key factors principal component analysis, used as input Back Propagation (BP) networks. degree variation synthesis score three sect...

1.1 Background The California Bearing ratio (CBR) test has been widely used in pavement design since mid 1940’s. It is a relative measure of subgrade soil or base/subbase aggregate strength. The Virginia Department of Transportation (VDOT) has been using its own Virginia Test Method-8 (VTM-8) to perform CBR testing. On the other hand, private industry and other DOT’s are using AASHTO (American ...

If the low-maintenance characteristics of slab track on open line are to be retained, great care must be taken to ensure that the subgrade layers are homogenous and capable of bearing the loads imposed [2]. The slabs can be precast or poured on site. The most known tracks with precast slabs are Shinkansen line in Japan and Max Bögl slab track designed in Germany [2], while as examples of the tr...