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Considering the effect of the separation between the supporting layer and the base layer of the ballastless railway caused by foundation settlement, a simplified method was proposed for calculating the rail deformation of the ballastless railway to tunnelling underneath. Firstly, the track slab and the supporting layer were supposed as a composite elastic beam, and a simplified equation for the deformation of ballastless railway composite beams induced by shield tunneling was proposed by ignoring the influence of fasteners on the composite beam deformation. Afterwards, the composite beam was divided into a void zone and a joint zone, and the analytical solutions for the deformations of the composite beams caused by tunnlling underneath were proposed based on the elastic foundation beam theory. Furthmore, the rail was regarded as an Euler beam connecting with the composite beam by the dispersed spring, and the equations for the rail deformation caused by the composite beam deformation were derived. Based on the above, compared with the numerical simulation and theoretical results in the existing literature, the proposed simplified method of the ballastless railway caused by tunneling underneath was validated. Finally, the influences of model parameters on the rail deformation to tunnelling underneath were discussed, including the tunnelling induced ground loss rate, the composite beam bending stiffness, the fastener stiffness, and the rail bending stiffness. The results indicate that the theoretical calculation results were overestimated by neglecting the local suspension effect of the supporting layer. Reducing the tunnelling induced ground loss rate, strengthening the composite beams and rails can control the rail deformation of the ballastless railway caused by tunnlling undercrossing, but strengthening the fasteners stiffness may increase the unevenness of rail deformation.

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考虑无砟铁路路基沉降可能诱发轨道支承层与基层产生分离问题,提出下穿隧道盾构施工诱发无砟铁路轨道变形的计算方法。将无砟铁路道床板和支承层简化为叠合梁,并忽略扣件对叠合梁变形的影响,提出盾构下穿诱发无砟铁路叠合梁变形的简化方程。接着,将叠合梁分为脱空区和接地段,基于弹性地基梁理论求出盾构下穿诱发无砟铁路叠合梁变形解析解。然后,将钢轨视为通过线性弹簧联系在叠合梁上的Euler梁,推导出叠合梁变形引起钢轨变形的计算公式。在此基础上,通过与既有文献数值模拟和理论解析结果对比,验证提出的盾构下穿引起无砟铁路轨道变形简化方法的正确性。最后,对盾构下穿引起无砟铁路轨道变形进行参数敏感性分析,包括隧道施工引起周围地层损失率、叠合梁抗弯刚度、扣件刚度和轨道抗弯刚度。研究表明:忽略无砟铁路支承层局部脱空效应,将导致盾构下穿引起钢轨变形计算结果偏大;减小隧道施工引起周围地层损失率、加固叠合梁和加固钢轨均能控制钢轨变形,但加固扣件刚度却增大轨道变形不平顺度。

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张茂斌(1981—),男,福建三明人,高级工程师,研究方向为公路工程管理与施工;

张丙强(1979—),男,湖北通山人,博士,教授,研究方向为地下工程。

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张茂斌(1981—),男,福建三明人,高级工程师,研究方向为公路工程管理与施工;

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盾构下穿引起无砟铁路轨道变形的计算方法
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张茂斌 1 , 张丙强 2
科技和产业 | 科技创新 2025,25(7): 88-93
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科技和产业 | 科技创新 2025, 25(7): 88-93
盾构下穿引起无砟铁路轨道变形的计算方法
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张茂斌1, 张丙强2
作者信息
  • 1 福建省漳州公路交通工程有限公司, 福建 漳州 363001
  • 2 福建理工大学土木工程学院, 福州 350118
  • 张茂斌(1981—),男,福建三明人,高级工程师,研究方向为公路工程管理与施工;

    张丙强(1979—),男,湖北通山人,博士,教授,研究方向为地下工程。

Calculation Method for Calculating Rail Deflection of Ballastless Railway Caused by Tunnelling Underneath
Maobin ZHANG1, Bingqiang ZHANG2
Affiliations
  • 1 Fujian Zhangzhou Highway Traffic Engineering Co., Ltd., Zhangzhou 363001, Fujian, China
  • 2 School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China
出版时间: 2025-04-10
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考虑无砟铁路路基沉降可能诱发轨道支承层与基层产生分离问题,提出下穿隧道盾构施工诱发无砟铁路轨道变形的计算方法。将无砟铁路道床板和支承层简化为叠合梁,并忽略扣件对叠合梁变形的影响,提出盾构下穿诱发无砟铁路叠合梁变形的简化方程。接着,将叠合梁分为脱空区和接地段,基于弹性地基梁理论求出盾构下穿诱发无砟铁路叠合梁变形解析解。然后,将钢轨视为通过线性弹簧联系在叠合梁上的Euler梁,推导出叠合梁变形引起钢轨变形的计算公式。在此基础上,通过与既有文献数值模拟和理论解析结果对比,验证提出的盾构下穿引起无砟铁路轨道变形简化方法的正确性。最后,对盾构下穿引起无砟铁路轨道变形进行参数敏感性分析,包括隧道施工引起周围地层损失率、叠合梁抗弯刚度、扣件刚度和轨道抗弯刚度。研究表明:忽略无砟铁路支承层局部脱空效应,将导致盾构下穿引起钢轨变形计算结果偏大;减小隧道施工引起周围地层损失率、加固叠合梁和加固钢轨均能控制钢轨变形,但加固扣件刚度却增大轨道变形不平顺度。

轨道变形  /  隧道下穿  /  无砟铁路  /  叠合梁  /  理论方法

Considering the effect of the separation between the supporting layer and the base layer of the ballastless railway caused by foundation settlement, a simplified method was proposed for calculating the rail deformation of the ballastless railway to tunnelling underneath. Firstly, the track slab and the supporting layer were supposed as a composite elastic beam, and a simplified equation for the deformation of ballastless railway composite beams induced by shield tunneling was proposed by ignoring the influence of fasteners on the composite beam deformation. Afterwards, the composite beam was divided into a void zone and a joint zone, and the analytical solutions for the deformations of the composite beams caused by tunnlling underneath were proposed based on the elastic foundation beam theory. Furthmore, the rail was regarded as an Euler beam connecting with the composite beam by the dispersed spring, and the equations for the rail deformation caused by the composite beam deformation were derived. Based on the above, compared with the numerical simulation and theoretical results in the existing literature, the proposed simplified method of the ballastless railway caused by tunneling underneath was validated. Finally, the influences of model parameters on the rail deformation to tunnelling underneath were discussed, including the tunnelling induced ground loss rate, the composite beam bending stiffness, the fastener stiffness, and the rail bending stiffness. The results indicate that the theoretical calculation results were overestimated by neglecting the local suspension effect of the supporting layer. Reducing the tunnelling induced ground loss rate, strengthening the composite beams and rails can control the rail deformation of the ballastless railway caused by tunnlling undercrossing, but strengthening the fasteners stiffness may increase the unevenness of rail deformation.

rail deformation  /  tunnelling undercrossing  /  ballastless railway  /  composite beam  /  theoretical method
张茂斌, 张丙强. 盾构下穿引起无砟铁路轨道变形的计算方法. 科技和产业, 2025 , 25 (7) : 88 -93 .
Maobin ZHANG, Bingqiang ZHANG. Calculation Method for Calculating Rail Deflection of Ballastless Railway Caused by Tunnelling Underneath[J]. Science Technology and Industry, 2025 , 25 (7) : 88 -93 .
盾构法由于机械化程度高、施工安全等优点,已成为地铁隧道下穿既有高速铁路线路的主要施工方法[1-3]。然而,盾构施工难免会引起周围地层损失,诱发上方既有路基沉降,进而降低轨道不平顺性,威胁铁路线路运营安全,缩短轨道系统使用寿命[4-5]。为确保既有铁路运营安全,控制路基沉降,准确计算和预测盾构下穿施工引起高速铁路轨道变形具有重要意义[6]
国内外学者通过现场实测[7-8]、数值计算[4-5,9]和理论解析[10-11]等手段对盾构下穿施工对既有铁路线路的影响进行了相关研究。张成平等[12]对大断面隧道暗挖施工引起的上覆地铁隧道结构变形规律进行了现场监测,发现隧道和道床产生不协调沉降而脱离。蔡小培等[5]对盾构下穿导致高速轨道变形规律进行了模拟分析,指出轨道变形会大幅增加车辆的动力响应。郭宇等[13]、Jiang等[14]分别建立考虑层间接触非线性的轨道-路基空间有限元模型,对路基不均匀沉降引起的无砟轨道轨面几何变形特征开展了研究,指出轨道板支承层与路基顶面极易发生离缝分离。浦逸辉等[2]对盾构下穿整体现浇隧道、盾构法隧道及U型槽段引起路基沉降、结构内力值和列车舒适性等进行了有限元分析,并给出结构沉降变形控制标准。理论解析方法分析主要为弹性地基梁法。黄晓林等[10]假定高铁轨道与地基土始终完全接触,将地表位移当作外荷载作用于轨道上,采用Fourier 级数求解轨道的位移和内力。程霖等[11]假定道床板与钢轨变形一致,引入阶梯函数描述轨道与基底的脱开状态,导出求解隧道变形引起轨道变形的级数解。雷鸣等[15]将无砟铁路结构简化成双层梁模型,并考虑轨道结构支承层局部脱空效应,提出盾构下穿引起无砟铁路轨道变形的计算方法,但求解计算过程较为复杂。
根据上述分析可知,既有理论模型大都将轨道(隧道)视为与地基土始终完全接触,或者将轨道与路基结构(隧道底板)看成一个整体,忽视了各结构层间的变形差异和分离问题,导致理论计算结果存在一定的误差。为此,本文在文献[15]基础上,考虑钢轨与道床的互相作用以及道床板底部脱空的影响,忽略轨道扣件力对轨道板的影响,推导盾构下穿引起无砟铁路轨道变形简化计算公式,计算效率更高,便于工程应用。
图1为盾构下穿既有无砟铁路示意图,无砟轨道系统由上自下分别为钢轨、轨道板和支承层,钢轨通过分散的高弹性扣件固定在轨道板上。隧道中心到路基顶面的竖向距离为zt,隧道开挖半径为Rt。为简化分析,将钢轨简化为Euler梁,钢轨弹性模量和惯性矩分别为ErIr;轨道板和支承层简化为弹性叠合梁[5],叠合梁弹性模量及惯性矩分别为EbIb,叠合梁自重为q,x为轨道水平坐标。不考虑轨道结构对盾构施工的影响,盾构施工引起路基顶面沉降为s(x),并且符合高斯正态分布。路基沉降引起钢轨和叠合梁位移分别为wr(x)、wb(x),并且路基沉降过程中钢轨与叠合梁始终保持密贴,而叠合梁底部中心与路基产生分离,脱空区宽度为2l。采用两阶段分析方法进行计算:第1阶段,忽略轨道扣件力对轨道板的影响,计算路基沉降引起叠合梁变形;第2阶段,考虑扣件力对钢轨和叠合梁的作用,计算叠合梁变形引起钢轨变形。
图2为路基沉降引起叠合梁变形计算模型,路基对支承层作用采用Winkler地基模型模拟, 路基的弹性系数为ks
根据Euler梁挠曲理论,可得叠合梁变形与外力关系为
${E}_{b}{I}_{b}\frac{{d}^{4}{w}_{b}\left(x\right)}{d{x}^{4}}=q-p$
式中:p为路基对叠合梁的作用力。
考虑铁路叠合梁底部局部脱空效应,采用梯度函数表达路基与支承层的相互作用力为
$p=H{k}_{s}\left[{w}_{b}\right(x)-s(x\left)\right]$
式中:H为梯度函数,即$H=\left\{\begin{array}{ll}1,& \left|x\right|>l\\ 0,& \left|x\right|\le l\end{array}\right.;$路基顶面沉降s(x)采用Peck提出的正态分布公式描述,即
$s\left(x\right)=\frac{\pi {R}_{t}^{2}{V}_{t}}{\sqrt{2\pi }{i}_{s}}exp\left[-0.5{\left(\frac{xsin\alpha }{{i}_{s}}\right)}^{2}\right]$
式中:Vt is分别为下穿隧道施工引起周围地层损失率和路基顶面的沉降槽宽度参数,is=κzt,κ为路基沉降槽宽度系数,取值与路基土体性质有关;α为下穿隧道与无砟铁路的水平夹角。
取模型右半部分进行分析,将式(2)代入式(1),并将叠合梁分为脱空段和接地段两部分,可得无砟路基沉降引起叠合梁变形方程为
$\left\{\begin{array}{l}\frac{{d}^{4}{w}_{b}\left(x\right)}{d{x}^{4}}=\frac{q}{{E}_{b}{I}_{b}}, 0\le x\le l\\ \frac{{d}^{4}{w}_{b}\left(x\right)}{d{x}^{4}}+\frac{{k}_{s}}{{E}_{b}{I}_{b}}{w}_{b}\left(x\right)=\frac{q}{{E}_{b}{I}_{b}}+\frac{{k}_{s}}{{E}_{b}{I}_{b}}s\left(x\right),\\          x>l\end{array}\right.$
(1)当0≤xl时,对式(4)进行积分运算,得到路基沉降影响下脱空段叠合梁变形为
${w}_{b1}\left(x\right)={c}_{1}+{c}_{2}x+{c}_{3}{x}^{2}+{c}_{4}{x}^{3}+\frac{q}{24{E}_{b}{I}_{b}}{x}^{4}$
式中:c1~c4为未知参数,可由边界条件确定。
根据模型对称性,叠合梁中点处转角和剪力为0,即
$\left\{\begin{array}{l}w\text{'}{ }_{b1}\left(0\right)=0\\ w‴{ }_{b1}\left(0\right)=0\end{array}\right.$
联合式(5)和式(6),可得c2=c4=0。式(5)可改写为
${w}_{b1}\left(x\right)={c}_{1}+{c}_{3}{x}^{2}+\frac{q}{24{E}_{b}{I}_{b}}{x}^{4}$
(2)当x> l时,根据半无限弹性地基梁理论,路基沉降影响下接地段叠合梁变形为
${w}_{b2}\left(x\right)={e}^{-\beta x}({c}_{5}cos\beta x+{c}_{6}sin\beta x)+\frac{q}{{k}_{s}}+{\tilde{w}}_{b}\left(x\right)$
式中:c5c6为未知参数;$\beta =\sqrt[4]{\frac{{k}_{s}}{4{E}_{b}{I}_{b}}};{\tilde{w}}_{b}\left(x\right)$为路基沉降s(x) 对应的方程特解,可采用三角级数展开法进行求解。
将路基沉降曲线s(x)采用余弦函数级数进行展开,记为
$s\left(x\right)={a}_{0}+\sum _{n=1}^{+\infty }\left({a}_{n}cos\frac{n\pi x}{l}\right)$
式中:${a}_{0}=\frac{1}{l}\underset{0}{\overset{+l}{\int }}s\left(x\right)dx;{a}_{n}=\frac{2}{l}{\int }_{0}^{+l}s\left(x\right)cos\frac{n\pi x}{l}dx。$
因此,方程特解${\tilde{w}}_{b}\left(x\right)$为余弦函数级数,具体为
${\tilde{w}}_{b}\left(x\right)={b}_{0}+\sum _{n=1}^{+\infty }\left({b}_{n}cos\frac{n\pi x}{l}\right)$
式中:${b}_{0}={a}_{0};{b}_{n}=\frac{{k}_{s}{a}_{n}}{{E}_{b}{I}_{b}{\left(\frac{n\pi }{l}\right)}^{4}+{k}_{s}}。$
(3)连续变形条件。对于x = l处,叠合梁的位移、转角、弯矩与剪力都保持连续,即
$\left\{\begin{array}{l}{w}_{b1}\left(l\right)={w}_{b2}\left(l\right)\\ w\text{'}{ }_{b1}\left(l\right)=w\text{'}{ }_{b2}\left(l\right)\\ {w}_{b1}^{″}\left(l\right)={w}_{b2}^{″}\left(l\right)\\ w‴{ }_{b1}\left(l\right)=w‴{ }_{b2}\left(l\right)\end{array}\right.$
由式(11)建立起一个关于未知参数c1c3c5c6和脱空区宽度2l的4阶的线性方程组。由于叠合梁底部脱空区宽度2l是一个未知数,需要进行多次迭代,编制MATLAB程序实现求解过程。接着,将确定参数分别代入式(7)和式(8),可得到铁路叠合梁变形表达式wb(x)。
图3为叠合梁变形引起钢轨变形的力学计算模型,扣件刚度系数为kr
根据离散弹性支承梁理论,得到钢轨在第i个扣件处的变形[5]
${w}_{ri}=-\sum _{j=1}^{N}{f}_{ij}{P}_{j}$
式中:N 为轨道的扣件总数;ij为扣件的代号;Pj为路基沉降引起第 j 个扣件产生的内力; fij 为第 j 个扣件产生单位内力引起第 i 个扣件处的轨道变形,计算公式为
${f}_{ij}=\left\{\begin{array}{l}\frac{{b}_{j}{x}_{i}}{6{E}_{r}{I}_{r}{L}_{r}}({L}_{r}^{2}-{x}_{i}^{2}-{b}_{j}^{2}), i\le j\\ \frac{{b}_{j}}{6{E}_{r}{I}_{r}{L}_{r}}\left[\frac{{L}_{r}}{{b}_{j}}({x}_{i}-{a}_{j}{)}^{3}+({L}_{r}^{2}-{b}_{j}^{2}){x}_{i}-{x}_{i}^{3}\right],\\            i>j\end{array}\right.$
式中:Lr为轨道的总长,Lr = (N+1) ls,ls为扣件的水平间距;xi 为第 i 个扣件到轨道端点距离,xi =ils;aj= xj,bj= Lr-xj
采用线性弹簧模拟扣件力,扣件力为
Pj=kr(wrj-wbj)
式中:wbj为叠合梁变形wb(x)在xj处的计算值。
联合式(13)和式(14)可得扣件力的控制方程为
$\frac{1}{{k}_{r}}{P}_{i}+\sum _{j=1}^{N}{f}_{ij}{P}_{j}=-{w}_{bi}$
将叠合梁在第i个扣件节点处的变形wbi代入式(14)求得扣件力,再代回式(12)中算出钢轨变形。
文献[13]为模拟轨道结构和路基之间很可能出现局部离缝甚至空吊现象,在2个表面法向选取“硬接触”,即只有在压紧状态下才能传递法向力,切向引入“弹性滑移变形”接触,建立考虑层间接触非线性的轨道-路基空间有限元模型,对双块式无砟铁路路基沉降与轨面变形关系进行了分析。当路基沉降波长S=20 m、幅值A=20 mm,以及路基沉降波长S=10 m、幅值A=10 mm时,无砟铁路路基沉降诱发支承层产生局部空吊。
为验证本文提出的简化方法的正确性,采用上述推导出的计算公式对以上两种工况的轨道变形进行计算,弹性叠合梁抗弯刚度EbIb =1.225×106 kN·m2,钢轨抗弯刚度ErIr = 6.624×103 kN·m2,扣件刚度系数kr = 3×104 kN/m,路基弹性系数ks= 6×104 kN/m。本文理论计算结果与文献[13]数值模拟值对比如图4所示。从图中可以看出,考虑叠合梁脱空的理论计算结果与文献[13]中的数值模拟结果较为接近,假定叠合梁与路基密贴的理论计算结果比数值模拟结果偏大。
文献[16]基于路基-轨道的变形传递过程假设,提出盾构下穿对无砟轨道变形影响的解析方法,并采用运用数值仿真方法对砂卵石地层条件下上部CRTSⅡ型无砟轨道的变形特征和沉降值进行模拟,对所提出的假定和计算方法进行验证。为考虑盾构施工扰动下路基与轨道结构之间可能产生脱离,数值模拟时在路基与轨道结构之间建立可脱离的硬接触,算例具体参数为:盾构隧道埋深zt= 11.7 m,开挖半径Rt=3 m,周围地层损失率Vt=0. 8%。铁路叠合梁等效弹模E =35 408 MPa,截面惯性矩I =0. 055 806 m4,自重均布荷载q =41 532 N/m。路基-轨道模型纵断面位移云图表明砂卵石地层中路基沉降槽较大,超出了轨道结构的最大下沉量,路基与轨道之间发生了脱离。本文理论计算结果与文献[16]计算数据对比如图5所示,从图中可以看出,两种计算方法得到的结果非常接近,但文献[16]没有给出轨道变形曲线。
实际工程中为控制轨道变形,通常采用减小隧道施工引起周围地层损失率、路基注浆、轨道加固、扣件加固等措施。为探讨以上各措施的控制效果,对隧道施工引起周围地层损失率、叠合梁抗弯刚度、扣件刚度和轨道抗弯刚度进行参数敏感性分析。
当隧道施工引起周围地层损失率Vt依次取0.8%、0.7%、0.6% 和 0.5%时,盾构下穿引起轨道变形曲线变化如图6所示。由图6可看出,随着隧道施工引起周围地层损失率的减小,轨道变形幅值逐渐减小,而轨道变形波长基本保持不变。这是由于隧道埋深不变时,隧道施工引起铁路路基顶面的沉降槽宽度不变;随着隧道施工引起周围地层损失率的减小,铁路路基顶面沉降幅值逐渐减小,导致叠合梁底部脱空区宽度逐渐减小。当隧道施工引起周围地层损失率从 0.8% 减小到 0.5% 时,轨道变形幅值从 11.0 mm 减小到 7.6 mm,减小了32%。因此,减小地层损失率有利于减小无砟铁路支承层底部脱空区宽度和轨道变形幅值。
当钢轨抗弯刚度依次取 1EI1、2EI1、3EI1和4EI1时,盾构下穿引起轨道变形曲线如图7所示。由图7可看出,当盾构施工参数保持不变时,随着钢轨抗弯刚度的增大,轨道变形幅值呈非线性减小趋势,而轨道变形波长逐渐增大,导致轨道变形不平顺度减小。当钢轨抗弯刚度从 1EI1增大到 4EI1 时,轨道变形幅值从 11.0 mm 减小到 9.5 mm,减小了14.2%。由此可见,加固钢轨控制盾构下穿对轨道变形较为理想。
图8为不同叠合梁抗弯刚度条件小盾构下穿引起轨道变形曲线,算例中叠合梁抗弯刚度依次取1EI2、2EI2、3EI2和4EI2。由图8可看出,随着叠合梁抗弯刚度的增大,轨道变形幅值呈非线性减小趋势,而轨道变形波长稍有减小。这是由于隧道施工参数不变时,隧道施工引起路基顶面的沉降槽幅值和宽度均保持不变;随着叠合梁抗弯刚度的增大,导致叠合梁底部脱空区宽度逐渐增大和变形幅值减小。当叠合梁抗弯刚度从 1EI2增大到 4EI2 时,轨道变形幅值从 11.0 mm 减小到 7.0 mm,减小了37%。由此可见,加固叠合梁控制盾构下穿对轨道变形的影响较为有效。
图9为不同钢轨扣件刚度条件下盾构下穿引起轨道的变形曲线,算例中扣件刚度依次取1kr、2kr、3kr和4kr。由图9可看出:随着钢轨扣件刚度的增大,钢轨变形幅值呈非线性增大趋势,但增大的趋势逐渐减小,而轨道变形波长逐渐减小,导致钢轨变形不平顺度增大。当扣件刚度从 1kr增大到 4kr 时,轨道变形幅值从 11.0 mm 增大到 12.7 mm,增大了14.6%。由此可见,加固扣件刚度不利于控制盾构施工引起钢轨变形不平顺度。
将钢轨视为支承在叠合梁上的上层Euler梁,将无砟铁路轨道板和支承层视为弹性叠合下层梁,并考虑无砟铁路路基沉降诱发轨道支承层产生局部脱空效应,建立下穿隧道开挖引起无砟铁路轨道结构变形的力学模型。忽略钢轨扣件力对叠合梁的作用,并将无砟铁路叠合梁分为脱空段和接地段,基于弹性地基梁理论推导下穿无砟铁路的隧道施工引起叠合梁变形计算公式;进而,考虑钢轨扣件力对钢轨的作用,基于弹性支承梁理论推导出叠合梁变形引起钢轨变形计算式。忽略无砟铁路支承层局部脱空效应,将导致盾构下穿引起钢轨变形计算结果偏大。减小隧道施工引起周围地层损失率、加固叠合梁和加固钢轨均能控制钢轨变形,但加固扣件刚度却增大轨道变形不平顺度。
  • 福建省自然科学基金(2023J01344)
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  • 接收时间:2024-10-08
  • 首发时间:2025-07-21
  • 出版时间:2025-04-10
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  • 收稿日期:2024-10-08
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福建省自然科学基金(2023J01344)
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    1 福建省漳州公路交通工程有限公司, 福建 漳州 363001
    2 福建理工大学土木工程学院, 福州 350118
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2种不同金属材料的力学参数

Family
属数
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genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
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Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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