北京地铁5号线下穿既有铁路的隧道施工

标签：工程设计, 北京地铁5号线下穿既有铁路的隧道施工,http://www.gong66.com
测精度0.1mm 。
衬结束
现代城市轨道交通3/2006 MODERNURBANTRANSIT

43

工程实践

4.3 量测点的埋设
（1）地表沉降点的埋设。在坚
硬路面结构上打孔放入套管，再在
松软地层上直接打入
φ
22
mm、长
100
cm
的圆头钢筋。接触网杆的量
测点可直接将膨胀螺栓在其上安设。
（2）拱顶下沉监测点沿区间隧
道每10
m设1个断面。
（3）收敛量测测点布置在与拱
顶下沉测点同一断面上，每断面2条
测线，埋设时要求尽量保持水平。
4.4 管理基准
在信息化施工中建立三级管理
标准，见表3。

4.5 量测数据发生突变时的处理
对策
（1）立即停止开挖掘进，对开
挖面采取加强支护措施。
（2）立即上报项目部及铁路局
北京地铁5号线下穿既有铁路的隧道施工孔保德

相关部门，由
项
表3三级管理标准

管理等级管理位移施工状态
ⅢU0<Un／3可正常施工
ⅡUn/3≤U0≤Un
·2/3应注意，并加强监测
ⅠU0>Un
·2/3应采取加强支护等措施
注：U0为实测位移值；Un为允许位移值，15mm。
目总工组织技术
人员进行分析，
制定相关措施，
并将情况及时上
报业主、监理和
设计等有关单位。

（3）对地表道路和建筑物等实
施日夜连续监控。
5
施工总结与体会

在采用帷幕注浆加固地层的前
提下，加强开挖支护过程中的质量
控制，包括对台阶长度及循环进尺
的控制，格栅拱脚的填实、及时回
填注浆。监控结果表明，穿越铁路
段累计地表最大沉降量为7.6
mm，
隧道初期支护完成后拱部沉降仅有

0.7
mm，从而保证了铁路运营安
全，达到了预期的效果。
施工中有以下几点体会。

（1）帷幕注浆起到了对地层预
加固的作用，控制了土体变形，减少
了地表沉降。
（2）初期支护的及早封闭、及
时进行回填注浆对控制地面沉降有
较大影响。
（3）必须与有关各方密切配合
联系，使各项措施及时到位，严格控
制，降低穿越铁路施工风险。
收稿日期2006-04-24

（上接第40
页）

远程监测范围为新建车站上

方100 m
纵向长度范围内的既有

线结构。

3.6.2 既有线沉降变化曲线
崇文门车站下穿既有线结构施
工完成后，既有运营地铁环线区间
结构最终沉降值为16.75
mm（最大
沉降值），设计沉降控制标准值为30mm
，满足了既有线结构和运营安
全的要求。施工过程中既有线左线

垂向沉降曲线见图5。

4
结束语

北京地铁
5
号线崇文门车站下
穿既有运营地铁隧道的施工最终获
得成功，我们得到的最大体会是理
论、实践及信息化施工的成功结
合：施工前经过反复论证确定方
案，而在以后的施工过程中又发现
新的问题，在对反馈信息进行认真
分析后采用新的措施，解决新问题。

我们始终对工程的风险性和难点保
持清醒认识，把握住施工各阶段的
关键环节，利用监控量测获得的信
息，发现新问题，研究新对策，攻
克新难关。我们在完成施工任务的
过程中培育了科学、求实和创新的
精神。

参考文献

1
王梦恕. 地下工程浅埋暗挖技术
通论.合肥:安徽教育出版社，
2004

2 邝健政. 岩土注浆理论与工程实
例. 北京：科学出版社，20013 沈杰.地基基础手册. 上海：上海
科学技术出版社，1985

4
夏明耀，曾进伦. 地下工程设计
施工手册. 北京：中国建筑工业
出版社，1999

图5既有线左线垂向沉降曲线变化
图
收稿日期2006-03-28

44
MODERNURBANTRANSIT 3/2006 现代城市轨道交通


ABSTRACTS

Carrying out Studies on Product Standard System of Urban Rail
Transit Wang Zhongwen, Chen Guojie 1

In combination with the needs of urban rail transit construction
and operation, the paper elaborates the importance of formulating
the product standard system and puts forward the guidelines for preparing
the product standard system and the structure of product standard
system framework on the basis of the systematic analyses on
the urban rail transit operation, the development trend of technical
equipment and the work of domestic and foreign standardization. The
product standard system covering rolling stock, power supply, signaling
and communication have been prepared as examples with the
conclusions of studies and suggestions be finally worked out.

WLAN and Its Application in Urban Rail Transit

Han Yi, Liu Gang, Dai Weiyang 7

The paper introduces the progress of WLAN standard and the basic
structure of WLAN, conducts brief analyses on the demands of
the wireless communication system in the modern urban rail transit
and puts forth the viability of WLAN application in the urban rail
transit system.

Unified and Compatible Signaling System: Foundation for
Interlinked Lines and Network of Urban Rail Transit

Liu Zhuo, Chen Chuanxin 12

The network of the urban rail transit must realize interlinked lines,
for which the unified and compatible signaling system is critical. The
experiences of the interlinked main lines in Europe and the North
America have provided us with the beneficial enlightenment.

Exploration on Computing Methods of Station Platform Width
for Metro and Light Rail Miao Saisong 15

The author of the article summarizes the current computing formulae
for the station platform width for metro and light rail in China,
for which he holds that they indicate in essence the certain function
relationship between the station platform width and the hourly passenger
traffic volume at peak hours. The new methods for computing
the station platform width by means of the natural logarithm mathematical
model are thus put forward.

Analyses on Technologies Selection of Linear Motor Vehicle

Li Zhiyuan, Wen Longxian, Wang Yi 18

The article makes the analyses on the technical characteristics of
the foreign linear motor vehicle in a way of contrast and puts forward
some suggestions for the technologies selection of the linear motor
vehicle in China in combination with the application on the
Guangzhou metro lines 4 and 5.

BriefIntroductionof StructureAllocationofComputer-aidedSignaling
System by Siemens Du Jianzhong 22

In the high-grade ATC system, the interlocking system, as the subsystem
of the ATC system, is also the key system. The article introduces
mainly the Siemens model LZB700M computer interlocking
(SICAS) system in the ATC system.

Key Components of Metro Train Door Regulation and Analyses
on Their Faults Li Yan 26
The paper conducts theoretical studies and technological analyses

in the light of the key points during the commissioning of the train
door for the metro line 1 in Nanjing. Practices have proved that mastery
of the key points in the commissioning of train door can reduce
the fault occurrence of the train door and improve the quality of
operation.

Design of Automatic Fir

www.gong66.come Alarm System for Guangzhou Metro

Liang Di 30

The article introduces the design range, mode and allocation scheme
of automatic fire alarm system for the completed lines of Guangzhou
metro as well as the points for attention in the aspect of interfacing

上一页  [1] [2] [3]  下一页

，北京地铁5号线下穿既有铁路的隧道施工