WO2011079675A1 - 桥上双块式无砟轨道道床施工工艺 - Google Patents

桥上双块式无砟轨道道床施工工艺 Download PDF

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Publication number
WO2011079675A1
WO2011079675A1 PCT/CN2010/079300 CN2010079300W WO2011079675A1 WO 2011079675 A1 WO2011079675 A1 WO 2011079675A1 CN 2010079300 W CN2010079300 W CN 2010079300W WO 2011079675 A1 WO2011079675 A1 WO 2011079675A1
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Prior art keywords
rail
track
sleeper
laying
rails
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PCT/CN2010/079300
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English (en)
French (fr)
Inventor
赵�智
谢录杲
秦瑞谦
王智勇
白昆华
龚斯昆
赵代强
梅红
万轶
杜建武
宋德佩
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中铁八局集团有限公司
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Application filed by 中铁八局集团有限公司 filed Critical 中铁八局集团有限公司
Publication of WO2011079675A1 publication Critical patent/WO2011079675A1/zh

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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/12Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01BPERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2/00General structure of permanent way
    • E01B2/003Arrangement of tracks on bridges or in tunnels

Definitions

  • the invention relates to the construction process of a high-speed railway passenger dedicated line, and particularly relates to a laying process of a double-block ballastless track in a bridge section.
  • means a small piece of stone.
  • the traditional railways are based on small stones, and then laid with sleepers or cement rails.
  • the rails are fixed on the sleepers, and the roads are paved with small gravel.
  • Rollers and sleepers both increase the force surface, disperse the train pressure, and help the rails to bear the weight, preventing the rails from sinking into the mud due to too much pressure.
  • This traditional ballasted track has the characteristics of simple laying and low overall cost, but it has reached the limit of carrying capacity under the long-term load of high-speed trains, the track smoothness is worse, the maintenance work is increased, and the available repair time is coming. The less, the serious hindrance of the development of high-speed railways.
  • ballastless track The sleepers of the ballastless track are themselves poured from concrete, and the roadbed does not use gravel. The rails and sleepers are laid directly on the concrete road. Therefore, due to its high ride comfort, high stability and high durability, ballastless track has been widely used in the construction of high-speed railway passenger dedicated lines. It is the advanced orbital technology in the world today, which can reduce maintenance, reduce dust, beautify the environment, and the train speed can reach
  • the double-block ballastless track is a kind of ballastless track system.
  • the concrete without ballast bed is mainly formed by the cast-in-place rail after cast-in-place method, that is, the support rail is supported by the support adjustment device, and the rail row is precisely adjusted and placed in the vertical mold.
  • the concrete forms a track bed.
  • the object of the present invention is to provide a construction technology of a double-block ballastless track bed on a bridge matched with a construction support adjustment device and a process control measure, so as to achieve high-precision laying of the double-block ballastless track on the bridge.
  • a double-block ballastless track bed construction technology on a bridge which comprises the following steps:
  • the first step is to ensure that the bridge settlement meets the construction requirements
  • the second step is to clean the deck
  • the third step is to construct a protective wall, expansion joints and waterproof layer
  • the fourth step is to lay a protective layer and pre-embedded shear boss
  • the left and right template edge lines, the track center line and the sleeper axis are ejected by the ink line on the bridge surface of the bridge section; then, the protective layer reinforcement is laid along the track direction, and the anti-shear convex is embedded about every 5 meters along the track direction.
  • the shear boss reinforcement is placed in the template;
  • Step 5 laying the isolation layer
  • the protective layer concrete and the shearing boss concrete are poured.
  • the protective layer concrete reaches the strength
  • the isolation layer composed of the geotextile is laid in the track bed plate, and the elastic pad is pasted around the shearing boss to make the track bed board. Separated from the deck surface;
  • Step 6 assemble the rails
  • the position of the two ends of the sleeper is directly drawn on the geotextile isolation layer by using a line drawing device before laying the sleeper; then, the temporary support wooden block is placed on the geotextile isolation layer between the bottom reinforcement layers, and the wooden block is located at both ends of the sleeper.
  • the height of the block is flush with the height of the shear boss or slightly higher than the shear boss, and the direction is parallel to the center line of the track; finally, the sleeper is lifted from the storage place to the block; c) laying rails
  • the fastener strip is completely fastened to the bottom of the clean rail on the side of the rail.
  • the side of the fastener strip facing away from the rail is on the angled support plate.
  • the gap between the fasteners and the bottom of the rails is checked to ensure that the gap is not greater than 0.5 mm;
  • the seventh step laying the surface layer
  • the eighth step fine tuning track
  • the track detection trolley is used to compare the geometrical position of the rail row with the design value, and the height adjustment and the centerline position of the rail row are finely adjusted by the lateral adjustment device and the vertical adjustment device, and the locking adjustment device and the reliable fixed rail row are arranged after the position;
  • the ninth step the concrete plating of the track bed
  • the concrete track rails of the perfusion bed are fixed.
  • the rail fasteners and the vertical support device are loosened.
  • the rails are transported by the rail transport to the next rail. The construction section continues to be used.
  • the insulation layer can prevent the temperature stress of the track from damaging the bridge support and ensure the safety of the bridge foundation.
  • the geometric shape of the track structure changes to ensure the comfort of operation;
  • the concrete fixed sleeper is poured on the isolation layer to make the whole track structure integral, thus ensuring the smoothness, comfort and safety of the track structure during operation, reducing maintenance work and working time.
  • Figure 1 is a schematic view of the structure of the present invention.
  • 1 is a protective layer
  • 2 is a barrier layer
  • 3 is a layer of rebar
  • 4 is a block
  • 5 is a shear boss
  • 6 is a fastener
  • 7 is a rail
  • 8 is a sleeper
  • 9 is a bottom reinforcement Floor.
  • the black circle in the figure indicates the reinforcement.
  • a double-block ballastless track bed construction technology on a bridge which comprises the following steps: The first step is to ensure that the bridge settlement meets the construction requirements;
  • the second step is to clean the deck
  • the third step is to construct a protective wall, expansion joints and waterproof layer
  • the fourth step is to lay the protective layer 1 and the embedded anti-slip boss 5
  • the left and right template edge lines, the track center line and the sleeper axis are ejected by ink lines on the bridge surface of the bridge section; then, the protective layer 1 reinforcement is laid along the track direction, and the shear resistance is embedded about 5 meters along the track direction.
  • the boss 5, the shear boss reinforcement is disposed in the template;
  • Step 5 laying the barrier 2
  • the protective layer concrete and the shearing boss concrete are poured.
  • the protective layer concrete reaches the strength
  • the isolation layer 2 composed of the geotextile is laid in the track bed plate, and the elastic pad is pasted around the shearing boss 5, so that The track bed board is separated from the bridge deck;
  • Step 6 assemble the rails
  • the position of both ends of the sleeper 8 is directly drawn on the geotextile separating layer 2 by using a line drawing device before laying the sleeper 8; then, the temporary supporting wooden block 4 is placed on the geotextile separating layer 2 between the bottom reinforcing layer 9
  • the block 4 is located at both ends of the sleeper 8, and the height of the wooden block 4 is flush with the height of the shearing boss 5 or slightly higher than the shearing boss, and the direction is parallel to the center line of the track; finally, the sleeper 8 is lifted from the storage place to the wooden Block 4; c) laying rail 7
  • the fastener spring strip is completely buckled on the side of the rail of the clean rail 7 on the side of the rail.
  • the side of the fastener strip facing away from the rail is on the angled support plate.
  • the seventh step laying the surface layer of steel 3
  • the eighth step fine tuning track
  • the track detection trolley is used to compare the geometric shape of the rail row with the design value, and the height adjustment and the center line position of the rail row are finely adjusted by the lateral adjustment device and the vertical adjustment device, and the locking adjustment device is arranged after the position, and the rail row is reliably fixed;
  • the ninth step the concrete plating of the track bed
  • the concrete bed rails of the perfusion bed are fixed.
  • the rail fasteners 6 and the vertical support device are released.
  • the rails are transported by the rails.
  • a shear boss 5 is provided on the deck surface protective layer 1 to resist the lateral stress of the rail and prevent displacement thereof.
  • An isolation layer 2 is disposed on the beam surface in the range of the elastic pad and the track bed around the shearing boss 5, and the isolation layer 2 can prevent the temperature stress of the track from damaging the bridge support and ensure the safety of the bridge foundation.
  • the geometric shape change of the track structure is limited to ensure the comfort of operation; the insulating sleeve is pre-buried on the sleeper 8 to install the matching fasteners 6, and the rails 7 are further fine-tuned by the fasteners 6, so that the train can run smoothly and at high speed;
  • the concrete fixed sleeper 8 is poured on the insulation layer 2, so that the entire track structure is formed integrally, thereby ensuring the smoothness, comfort and safety of the track structure during operation, and reducing maintenance work and working time.
  • the present invention maintains the geometrical spatial position of the double-block rail-discharge system in the whole construction process through the application and process operation control of the construction support adjustment device, and improves the double-block ballastless track on the bridge.
  • the paving accuracy improves the construction quality.

Description

桥上双块式无砟轨道道床施工工艺 技术领域
本发明涉及高速铁路客运专线修建工艺领域,具体涉及一种双块式无砟轨 道在桥梁地段的铺设施工工艺。
背景技术
在铁路上, "砟" 的意思是小块的石头。传统的铁路都是在小块石头的基 础上, 再铺设枕木或水泥钢轨, 钢轨固定放在枕木上, 之下为小碎石铺成的路 砟。 路砟和枕木均起加大受力面、 分散火车压力、 帮助铁轨承重的作用, 防止 铁轨因压力太大而下陷到泥土里。 这种传统有碴轨道具有铺设简便、 综合造价 低廉等特点, 但是在高速列车长期荷载作用下已达到了承载能力的极限, 轨道 平顺度变差, 维修作业量加大, 可用的维修时间越来越少, 严重阻碍了高速铁 路的发展。无砟轨道的轨枕本身是混凝土浇灌而成,而路基也不用碎石,铁轨、 轨枕直接铺在混凝土路上。 因此, 无砟轨道因其具有高平顺性、 高稳定性、 高 耐久性等特点, 在高速铁路客运专线建设领域得到广泛的应用。 是当今世界先 进的轨道技术, 可以减少维护、 降低粉尘、 美化环境, 而且列车时速可以达到
200公里以上。
双块式无砟轨道是无砟轨道系统的一种,无砟道床混凝土主要采用支撑轨 排后现浇法成型, 即采用支撑调整装置支撑固定轨排, 轨排精确调整到位后立 模现场浇筑混凝土形成道床板。 这种施工工艺是在长期的工程实践中完善的, 全部采用机械化施工, 特别是需控制轨道铺设精度的专用设备和装置, 以及相 关工艺控制措施。 目前国内的技术研究处于起歩阶段。 发明内容
本发明的目的是提供一种施工支撑调整装置和工艺控制措施相配套的桥 上双块式无砟轨道道床施工工艺, 使桥上双块式无砟轨道实现高精度铺设。 一种桥上双块式无砟轨道道床施工工艺, 它包括如下步骤:
第一步, 确保桥梁沉降满足施工要求;
第二步, 清理桥面
清除桥梁段的桥面上的浮渣、 灰尘及杂物;
第三步, 施工防护墙、 伸缩缝和防水层;
第四步, 铺设保护层和预埋抗剪凸台
根据放样点, 在桥梁段的桥面上用墨线弹出左、 右模板边线、 轨道中心线 及轨枕轴线; 然后, 沿轨道方向铺设保护层钢筋, 沿轨道方向每隔约 5米预埋 抗剪凸台, 抗剪凸台钢筋设置在模板内;
第五步, 铺设隔离层
首先,浇筑保护层混凝土和抗剪凸台混凝土,当保护层混凝土达到强度后, 在道床板范围内铺设由土工织物构成的隔离层, 同时在抗剪凸台周围粘贴弹性 垫板, 使得道床板与桥面分离;
第六步, 组装轨排
a)铺设道床底层钢筋层;
b)铺设预制好的轨枕
首先,在铺设轨枕前用画线器将轨枕两端的位置直接画在土工织物隔离层 上; 然后, 在底层钢筋层间的土工织物隔离层上放置临时支撑木块, 木块位于 轨枕两端, 木块高度与抗剪凸台高度齐平或略高于抗剪凸台, 方向与轨道中心 线平行; 最后, 将轨枕从存放地抬到木块上; c)铺设钢轨
铺设钢轨前, 清除轨枕承轨台上的施工杂物, 人工配合吊车将钢轨吊放到 轨枕承轨槽垫板上, 两段钢轨的端头通过鱼尾板进行连接, 钢轨接头缝隙根据 轨温确定;
d)调整轨枕间距
将两股钢轨端头放正, 并使其对正无砟轨道铺设起点位置处, 根据设计图 纸, 在钢轨上画标识线标识出轨枕的中心位置, 人工使用套橡胶的撬棍将或橡 皮锤将轨枕中心调整到标识线位置处;
e)紧固扣件
扣件弹条朝钢轨的一侧完全扣在干净的钢轨轨底上,扣件弹条背向钢轨的 一侧在角形支撑板上, 先用扭距扳手紧固螺栓, 再用螺拴紧松机拧紧扣件,钢 轨两侧的扣件同时施加扭矩,并用塞尺检查扣件弹条与轨底之间的间隙, 保证 不大于 0. 5毫米;
第七步,铺设面层钢筋层
用起道机粗调轨排标高和中线, 到位后安装竖向支撑装置并牢固支撑轨 排, 安装侧向调整装置, 取出支撑木块, 然后在道床上安装面层钢筋层; 所有 横向和纵向钢筋的节点之间加垫绝缘材料, 内部的钢筋节点绝缘, 道床板纵横 向钢筋不形成回路, 不产生电磁感应, 使道床板对钢轨信号传输距离不会由此 产生影响;
第八步, 精调轨排
采用轨道检测小车测量轨排几何形位与设计值进行比较, 并通过侧向调整 装置和竖向调整装置精调轨排标高和中线位置, 到位后锁紧调整装置、 可靠固 定轨排; 第九步, 道床板混凝土浇筑
满足设计要求后, 灌注道床混凝土固定轨排, 当达到初凝后, 松开钢轨扣 件和竖向支撑装置; 道床板混凝土浇筑完成 12个小时后, 用钢轨运输平车将 钢轨运输到下一施工段继续使用。
由于采用了上述技术方案, 本发明的有益效果是:
1. 在桥面保护层上设置抗剪凸台, 以抵挡轨道的横向应力, 防止其发生 位移;
2. 在抗剪凸台周围粘贴弹性垫板及道床板范围内的梁面上设置隔离层, 隔离层能够防止轨道的温度应力对桥梁支座的破坏,确保桥梁基础的安全性的 同时, 限制了轨道结构的几何形位变化, 确保了运营的舒适性;
3. 在轨枕上预埋绝缘套管安装配套的扣件, 通过扣件进一步精调钢轨, 确保列车可以平稳高速运行;
4. 在隔离层上灌注混凝土固定轨枕, 使得整个轨道结构形成整体, 从而 确保轨道结构在运行过程中的平顺性、 舒适性、 安全性, 减少维护作业量和作 业时间。
附图说明
图 1是本发明结构示意图。
附图标记: 1是保护层, 2是隔离层, 3是面层钢筋层, 4是木块, 5是抗 剪凸台, 6是扣件, 7是钢轨, 8是轨枕, 9是底层钢筋层。
图中黑圆圈表示钢筋。 具体实施方式
下面结合附图对本发明作进一歩说明:
一种桥上双块式无砟轨道道床施工工艺, 它包括如下步骤: 第一步, 确保桥梁沉降满足施工要求;
第二步, 清理桥面
清除桥梁段的桥面上的浮渣、 灰尘及杂物;
第三步, 施工防护墙、 伸缩缝和防水层;
第四步, 铺设保护层 1和预埋抗剪凸台 5
根据放样点, 在桥梁段的桥面上用墨线弹出左、 右模板边线、 轨道中心线 及轨枕轴线; 然后, 沿轨道方向铺设保护层 1钢筋, 沿轨道方向每隔约 5米预 埋抗剪凸台 5, 抗剪凸台钢筋设置在模板内;
第五步, 铺设隔离层 2
首先,浇筑保护层混凝土和抗剪凸台混凝土,当保护层混凝土达到强度后, 在道床板范围内铺设由土工织物构成的隔离层 2, 同时在抗剪凸台 5周围粘贴 弹性垫板, 使得道床板与桥面分离;
第六步, 组装轨排
a)铺设道床底层钢筋层 9;
b)铺设预制好的轨枕 8
首先,在铺设轨枕 8前用画线器将轨枕 8两端的位置直接画在土工织物隔 离层 2上; 然后, 在底层钢筋层 9间的土工织物隔离层 2上放置临时支撑木块 4, 木块 4位于轨枕 8两端, 木块木块 4高度与抗剪凸台 5高度齐平或略高于 抗剪凸台, 方向与轨道中心线平行; 最后, 将轨枕 8从存放地抬到木块 4上; c)铺设钢轨 7
铺设钢轨 7前, 清除轨枕承轨台上的施工杂物, 人工配合吊车将钢轨 7吊 放到轨枕承轨槽垫板上, 两段钢轨 7的端头通过鱼尾板进行连接, 钢轨 7接头 缝隙根据轨温定; d) 调整轨枕 8间距:
将两股钢轨 7端头放正, 并使其对正无砟轨道铺设起点位置处, 根据设计 图纸, 在钢轨 7上画标识线标识出轨枕 8的中心位置, 人工使用套橡胶的撬棍 将或橡皮锤将轨枕中心调整到标识线位置处;
e) 紧固扣件 6
扣件弹条朝钢轨的一侧完全扣在干净的钢轨 7轨底上,扣件弹条背向钢轨 的一侧在角形支撑板上,先用扭距扳手紧固螺栓, 再用螺拴紧松机拧紧扣件 6, 钢轨 7两侧的扣件 6同时施加扭矩,并用塞尺检查扣件弹条与轨底之间的间隙, 保证不大于 0. 5毫米;
第七步,铺设面层钢筋层 3
用起道机粗调轨排标高和中线, 到位后安装竖向支撑装置并牢固支撑轨 排, 安装侧向调整装置, 取出支撑木块 4, 然后在道床上安装面层钢筋层 3 ; 所有横向和纵向钢筋的节点之间加垫绝缘材料, 内部的钢筋节点绝缘, 道床板 纵横向钢筋不形成回路, 不产生电磁感应, 使道床板对钢轨信号传输距离不会 由此产生影响;
第八步, 精调轨排
采用轨道检测小车测量轨排几何形位与设计值进行比较, 并通过侧向调整 装置和竖向调整装置精调轨排标高和中线位置, 到位后锁紧调整装置、 可靠固 定轨排;
第九步, 道床板混凝土浇筑
满足设计要求后, 灌注道床混凝土固定轨排, 当达到初凝后, 松开钢轨扣 件 6和竖向支撑装置; 道床板混凝土浇筑完成 12个小时后, 用钢轨运输平车 将钢轨运 7输到下一施工段继续使用。 本发明中, 在桥面保护层 1上设置抗剪凸台 5, 以抵挡轨道的横向应力, 防止其发生位移。在抗剪凸台 5周围粘贴弹性垫板及道床板范围内的梁面上设 置隔离层 2, 隔离层 2能够防止轨道的温度应力对桥梁支座的破坏, 确保桥梁 基础的安全性的同时,限制了轨道结构的几何形位变化,确保了运营的舒适性; 在轨枕 8上预埋绝缘套管安装配套的扣件 6, 通过扣件 6进一步精调钢轨 7, 确保列车可以平稳高速运行; 在隔离层 2上灌注混凝土固定轨枕 8, 使得整个 轨道结构形成整体, 从而确保轨道结构在运行过程中的平顺性、 舒适性、 安全 性, 减少了维护作业量和作业时间。
这样, 本发明通过施工支撑调整装置的应用和工艺操作控制, 使双块式轨 排系统的几何空间位置在整个施工过程中保持稳固、 可无级调整, 提高了桥上 双块式无砟轨道铺设精度, 有效提高了施工质量。

Claims

1.一种桥上双块式无砟轨道道床施工工艺, 它包括如下步骤:
第一步, 确保桥梁沉降满足施工要求;
第二步, 清理桥面
清除桥梁段的挢面上的浮渣、 灰尘及杂物;
第三步, 施工防护墙、 伸缩缝和防水层;
第四步, 铺设保护层 (1) 和预埋抗剪凸台 (5)
根据放样点, 在桥梁段的桥面上用墨线弹出左、 右模板边线、 轨道中心线 及轨枕轴线; 然后, 沿轨道方向铺设保护层(1)钢筋, 沿轨道方向每隔约 5米 预埋抗剪凸台 (5), 抗剪凸台钢筋设置在模板内;
第五步, 铺设隔离层 (2)
首先,浇筑保护层混凝土和抗剪凸台混凝土,当保护层混凝土达到强度后, 在道床板范围内铺设由土工织物构成的隔离层 (2), 同时在抗剪凸台 (5) 周 围粘贴弹性垫板, 使得道床板与桥面分离;
第六步, 组装轨排
a) 铺设道床底层钢筋层 (9);
b) 铺设预制好的轨枕 (8)
首先, 在铺设轨枕 (8) 前用画线器将轨枕 (8) 两端的位置直接画在土工 织物隔离层 (2) 上; 然后, 在底层钢筋层 (9) 间的土工织物隔离层 (2) 上 放置临时支撑木块 (4), 木块 (4) 位于轨枕 (8) 两端, 木块 (4) 高度与抗 剪凸台 (5) 高度齐平或略高于抗剪凸台 (5), 木块 (4) 的方向与轨道中心线 平行; 最后, 将轨枕 (8) 从存放地抬到木块 (4) 上;
c) 铺设钢轨 (7)
铺设钢轨 (7) 前, 清除轨枕承轨台上的施工杂物, 人工配合吊车将钢轨 ( 7) 吊放到轨枕承轨槽垫板上, 两段钢轨 (7) 的端头通过鱼尾板进行连接, 钢轨接头缝隙根据轨温确定;
d) 调整轨枕间距
将两股钢轨 (7) 端头放正, 并使其对正无砟轨道铺设起点位置处, 根据 设计图纸, 在钢轨 (7) 上画标识线标识出轨枕 (8) 的中心位置, 人工使用套 橡胶的撬棍将或橡皮锤将轨枕中心调整到标识线位置处;
e) 紧固扣件 ( 6)
扣件弹条朝钢轨的一侧完全扣在干净的钢轨 (7) 轨底上, 扣件弹条背向 钢轨的一侧在角形支撑板上, 先用扭距扳手紧固螺栓, 再用螺拴紧松机拧紧扣 件 (6) ,钢轨 (7) 两侧的扣件 (6) 同时施加扭矩,并用塞尺检查扣件弹条与 轨底之间的间隙, 保证不大于 0. 5毫米;
第七步,铺设面层钢筋层 (3)
用起道机粗调轨排标高和中线, 到位后安装竖向支撑装置并牢固支撑轨 排, 安装侧向调整装置, 取出木块 (4), 然后在道床上安装面层钢筋层 (3); 所有横向和纵向钢筋的节点之间加垫绝缘材料, 内部的钢筋节点绝缘, 道床板 纵横向钢筋不形成回路, 不产生电磁感应, 使道床板对钢轨信号的传输距离不 会由此产生影响;
第八步, 精调轨排
采用轨道检测小车测量轨排几何形位与设计值进行比较, 并通过侧向调整 装置和竖向调整装置精调轨排标高和中线位置, 到位后锁紧调整装置、 可靠固 定轨排;
第九步, 道床板混凝土浇筑
满足设计要求后, 灌注道床混凝土固定轨排, 当达到初凝后, 松开钢轨扣 件(6) 和竖向支撑装置; 道床板混凝土浇筑完成 12个小时后, 用钢轨运输平 车将钢轨运 (7) 输到下一施工段继续使用。
PCT/CN2010/079300 2009-12-30 2010-11-30 桥上双块式无砟轨道道床施工工艺 WO2011079675A1 (zh)

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