| China started the construction of high-speed railway built in1999QINSHEN. After10years of high-speed railway construction and transformation of the existing high-speed railway, China now has the world’s largest and the highest operating speed of high-speed rail network. As of the end of December2010, China’s domestic operating speed of200km above the high-speed railway mileage has reached8358km [1], including the existing line speed of nearly3,000km. Connect Qinhuangdao and Shenyang QINSHEN is China’s first high-speed railway, the design speed of250km, high-speed railway in China’s pre-test section..Combined arms for the Shanghai-Wuhan-Chengdu Railway as part of fast-track. Hefei, Anhui Province, east China, had the Dabie Mountains by Lu’an City, Hubei Macheng then, the red security, Huangpi, to Wuhan, as shown in Figure1-1. The total length of359.361km line, which Anhui Province201.588km. Hefei to the pier by the Yee Tong Station Shanghai Railway Bureau under the jurisdiction of the pier segment defined by the Church to the west Hankou Wuhan Railway Bureau. Keywords:high slope stability of complex formation drilling process control methods the overall governance and comprehensive measures.Catenary is erected along the railway line air supply to the electric locomotives a special form of transmission lines. The suspension by the contact, support devices, positioning devices, pillar and foundation of several parts. Pillar and foundation to withstand exposure to suspension, and positioning devices to support all loads, suspension and contact with a fixed position and the required height. This combined force of the catenary wire tunnel pillar of the chemical anchor bolt installation for tensile-shear failure mode and adaptive research. Major study from the following aspects:Anchor Research home and abroad, from the design calculation of the company, failure mode, the safety factor, bearing capacity limit state calculations in areas such as research.Anchor tunnel design to consider the following issues:the characteristics of the substrate; anchor installation factors; anchor the force load conditions; tunnel fire requirements; principle of selecting the appropriate anchor bolts; anchor in a different force in case of failure mode analysis. The adaptation of anchor performance.In this paper, a large number of on-site geological investigations and interior finishing statistics for tunnel catenary pillars of security, accuracy demanding problem, by studying the destruction of the tunnel form anchor system, fire and seismic performance of high-speed rail tunnel in the adaptability and on this basis, the use of related technology model, combined with engineering practice, to calculate a variety of loads, anchor damage to the bearing capacity limit form, ultimately designed to meet the high-speed railway tunnel pillar of catenary anchor installation bolt optimization proposal.Get some knowledge and conclusions as follows:anchoring the scene tunnel lining are C35, but considering the construction of the concrete strength we generally put down to C25. Installation position for the top of the tunnel, according to the gravity principle, prone to hollowing the top of the concrete, uneven, etc., for a fixed anchor has a great influence. Select the shape of chemical anchor as column tunnel catenary installation is ideal for chemical anchor bolt can make up and reinforced concrete tunnel at the top of hollowing, uneven state.Expansion of the adhesive type anchor (ie, chemical anchor shape) can be applied similar to the load of metal anchors, and select the international authority of the fire through the anchor test; vinyl ester resin, high temperature performance than epoxy mortar mix class mortar better. So best to anchor the gel type resin, vinyl ester. Chemical anchor shape the final choice, which according to German standard DIN4102and European technical certification organization (EOTA) Technical Report TR20to fire tests.Through specific case of the calculation of the force.Were destroyed in accordance with steel tensile capacity, pull-out, three kinds of concrete cone failure mode of damage is calculated. Shear capacity of steel, respectively, according to damage, destroy concrete anti-skid failure modes such as two kinds of calculations. Tensile-shear combined capacity checking. Requirements are met, then anchor can be applied. |
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