拱顶

In order to research the fire properties in the municipal tunnel with the mode of natural ventilation and the openings on its roof, full-scale fire tests were designed and conducted in a finished tunnel. The longitudinal diversification laws of maximum smoke temperature around the vault of the tunnel were collected.

为了研究顶部开口的城市隧道在采用自然通风模式下的火灾特性，在已建成的隧道中设计并实施了全尺寸火灾试验，得到了隧道火灾自然通风模式下的拱顶附近烟气最高温度纵向变化数据。

Based on the in-situ monitoring of Gonghe Tunnel and numerical simulation, the failure feature of layered rockmass was analyzed; and the results show that the surrounding rock deformation and displacement, contact pressure and fracture zone mainly exist on the right side of the tunnel vault, that is, the side near the river is larger than that near the mountain.

结合共和隧道现场监测和数值模拟相结合的方法对层状岩体的破坏特征进行了分析，研究结果表明：围岩的变形位移、破坏区都主要集中隧道拱顶右侧，即靠河侧大于靠山侧。

By the half-analytic calculation method, the paper analyzed the tunnel circumjacent constringency and vault settlement with time and alteration depth of tunnel face, the relevant constringency model was built, and the reasonable second support time for hard and soft rock tunnel were proposed.

中文摘要：利用半解析计算方法，考虑了隧道周边收敛和拱顶下沉随时间和掌子面推进距离的变化情况，建立了相关的收敛模型，并由此给出了硬岩及软岩隧道中的二衬的合理支护时机，并结合工程实际对Ⅱ、Ⅲ、Ⅳ、Ⅴ级围岩进行了周边收敛结果的最小二乘拟合计算。

The results show that the ranges of secondary stress distribution have differences corresponding to different wall rock conditions of mining tunnel; but the principal stress distribution transits from compressive stress centralized in mining tunnel sidewall to tensile stress centralized in mining tunnel vault and floor.

研究结果表明，围岩条件不同的采矿巷道其二次应力分布影响范围有所差异，但围岩主应力总体上表现为由巷道边墙中下部位的压应力集中带逐步过渡到拱顶、底板一定范围内的拉应力集中带。

This paper examines the cracks appeared in the retaining wall beside the FeiYuze tunnel uplink secondary lining vault. The seismic CT technology was used to investigate the engineering geology structure of the covering rock mass above the tunnel. The results indicate that the rock mass had three fracture zones along tunnel axial and the rock mass quality in the small mileage entrance section was poor.

针对飞鱼泽隧道的上行线二衬拱顶靠档墙处出现裂缝，经地震CT技术查清隧道上所覆盖岩体的工程地质结构结果表明，沿隧道轴向存在三个岩体破碎带，其中在小里程入口段，岩体完整性较差。

Dongziya Tunnel DK683 +938 ~ DK684 +076 segment is with Dukang groove fault fracture zone, in which the DK683 +938 ~ DK684 +004 segment is shallow-buried. Shallow-buried depth of tunnel, fractured,rock of tunnel are apt to cause vault subsidence, horizontal convergence, collapse in excavation progress.

洞子崖隧道DK683+938～DK684+076段属杜康沟断层破碎带，其中DK683+938～DK684+004段为浅埋段，隧道埋深浅、围岩较破碎，施工中易出现拱顶下沉、水平收敛、坍塌等现象。

Temporary support, anchored grouting and enhanced water diversion and discharge are taken to solve the subsidence of water-saturated shallow-depth fracture zone vault of Haozhuang Tunnel along Tongchuan-Huanglin first-class highway.

为了解决铜川—黄陵一级公路蒿庄梁隧道富水破碎带拱顶下沉问题，采用了加强临时支护、吉迈式锚杆注浆、加强引排水等措施进行了治理，有效地固结了断层破碎带，形成应力圈，控制住下沉，解决了淋滴水和漏水问题，处理效果较为理想。

Combined with that the influence of the prestressed tendon layout on mechanics characteristic of three-span prestressed concrete deck arch bridge is taken into account in these methods, and demand of internal force and displacement in design is satisfied by using upward and downward eccentric layout of prestressed tendon.

这些设计法针对该类桥型的特点，利用在拱顶粱中分别布置一定数量的上下偏心的预应力筋来优化结构的内力和满足各部分的位移限制要求。

Steel storage tank with dome is widely used in oilfield ground engineering construction and its construction technology is getting ripe.

钢制拱顶储罐在油田地面工程建设中得到广泛应用，其建造技术已基本成熟。

As the size of the storage tanks are larger and larger,there will be more and more large lattice dome roof tank s.

随着储罐向大型化发展，大型网壳拱顶罐大量出现，其结构特点给储罐的安装增加了难度。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。