1) sagging of arch
桥拱下沉
2) vault settlement
拱顶下沉
1.
For example,the probability distributions of the maximum ground subsidence and the vault settlement appear to be approximately normal ones.
同时还得到几点地层变形规律,如:最大地表沉降和拱顶下沉值的概率分布近似成正态分布;随着围岩稳定性由好变坏,地表沉降和拱顶下沉值也呈逐渐增大的趋势;隧道跨度为5～10m时,II,III,V类围岩条件下的最大地表沉降值与上覆土层厚度关系呈凸形状,II,III类围岩的最大拱顶沉降值在埋深25m范围内随隧道埋深增大而增大;拱顶沉降与地表沉降比值多为0。
2.
Authors analyzed the inner forces of initial support and secondary lining,safety factor,convergence of tunnel inner perimeter,vault settlement and distribution of plastic zone in surrounding rock,evaluated the safety of lining structure.
针对榆树沟隧道工程实际情况,选取了3种不同的复合式衬砌结构类型进行数值计算,对初期支护和二次衬砌的内力、安全系数及洞周位移、拱顶下沉、围岩塑性区的分布等进行了分析,评价了衬砌结构的安全性。
3.
Based on field monitoring data of more than fifty two-lane highway tunnels,the data of convergence displacements and vault settlements were analyzed through statistical method.
基于50多条两车道NATM高速公路隧道的现场监测数据,通过对围岩收敛变形和拱顶下沉数据的统计分析,探讨隧道II,III,IV,V级围岩随时间的变形特性,得到不同级别围岩隧道从开挖到变形稳定的时间,分析稳定时间与围岩级别的关系,为隧道施工阶段围岩的稳定性评价以及二次衬砌的合理施做时机提供依据。
3) vault crown settlement
拱顶下沉
1.
By site monitoring,such as ground settlement,clearance convergence,vault crown settlement and site observation, etc.
以景(德镇)婺(源)黄(山)高速公路姚村坦连拱隧道施工中出现的险情为例,结合地表沉降、洞内净空收敛及拱顶下沉进行观测及现场观察,针对隧道出口段围岩失稳导致中导洞右侧工字钢严重内敛现象进行了动态预报,从而为及时采取有效措施排除险情争取了时间,避免了重大事故的发生,以此进一步说明了监控量测在隧道修建过程中的必要性。
2.
After analyzing the vault crown settlement tendency of the tunnel and the factors affected it,the Genetic algorithm neural network model for predicting the vault crown settlement has been created.
因此,作者在分析了隧道拱顶下沉规律及其主要影响因素的基础上,采用基于遗传算法的神经网络建立了隧道拱顶下沉时序的预测模型。
3.
Due to lag of settlement monitoring,measured vault crown settlement is merely a portion of total settlement in construction of city metro tunnel,and ratio of measured settlement to total settlement varies notably with ground condition.
由于变形监测的滞后,在城市地铁隧道施工中所测到的拱顶下沉通常仅为总下沉量的一部分,并且其所占的比例在不同地层条件下具有较大差异。
4) vault subsidence
拱顶下沉
1.
In land sections of Xiang′an subsea tunnel in Xiamen with unfavorable geological condition,where large-section shallow-buried excavation method is adopted,the vault subsidence of some sections exceeds allowable value obviously.
厦门海底隧道两端陆域软弱地段大断面浅埋暗挖施工中,部分断面拱顶下沉偏大。
5) crown settlement
拱顶下沉
1.
By the in_suit measure, regression analysis and numerical simulation of ground & crown settlement in Shenzhen Metro PhaseⅠProject section tunnel, an exponential function method is used to predict the unmeasured crown settlement and numerical simulation to crown s pre_settlement.
通过对深圳地铁一期工程区间隧道地表、拱顶下沉的现场实测及回归分析和数值模拟,提出了预测拱顶下沉的指数函数方法和超前拱顶下沉数值模拟方法。
6) Arch crown subsidence
拱顶下沉
1.
According to the monitoring data of the arch crown subsidence,the thesis analysis the effect rule of the arch crown subsidence because of excavation.
本文以拱顶下沉的监测数据为依据,分析了群洞开挖对拱顶下沉的影响规律, 通过对群洞施工时的洞室之间的相互影响情况,提出一些有指导性的意见。
补充资料：拱北桥
拱北桥
拱北桥俗称五眼桥，位于广东惠州西湖北面的湖水出口处。北宋治平年间（1506-1521年），太守陈偁筑堤围湖时建，至今已有900年历史，历代均有维修。1925年东征时，黄埔军校师生经此桥攻打惠州北门。现桥头建有黄埔军校东征阵亡烈士纪念碑。 桥为砖石结构，长40米，宽8.4米，高8.7米，造型古朴，建筑牢固，是西湖历史上著名的六桥之一。每当春暖花开，湖水入江时，滚雪流珠，为湖上名景之一。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。