Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ballastless track in high-speed rail turnout zone and anti-cracking construction method thereof
The invention discloses a ballastless track in a high-speed rail turnout zone and an anti-cracking construction method of the ballastless track. The ballastless track in the high-speed rail turnout zone is sequentially provided with a concrete base, a slag-free ballast bed plate and a prefabricated sleeper block from bottom to top, a transverse drainage slope is arranged on the surface of the slag-free ballast bed plate towards the outer side of a line, a transverse drainage slope is arranged on the surface of the concrete base towards the outer side of the line, and chamfers are arranged on the edge of the prefabricated sleeper block. The method has the following beneficial effects: aiming at actual working conditions, the ballast bed concrete mix proportion is optimized, so that a surface laitance layer is reduced; internal curing materials, fibers and the like are doped, so that the anti-cracking performance is improved; edge chamfering optimization is conducted on the shape of thesleeper block, meanwhile, the surface of the prefabricated sleeper block is coated with an interface agent before construction, the binding power between the sleeper block and ballast bed concrete isimproved, and then stress concentration at the interface is reduced; and low-temperature mold entering and rapid pouring are adopted for field operation, and the influence of temperature difference oncracking is reduced.
本发明公开了一种高铁岔区无砟轨道及其防裂施工方法，该高铁岔区无砟轨道由下至上依次设置的混凝土底座、无渣道床板以及预制轨枕块，无渣道床板表面向线路外侧设置有横向排水坡，混凝土底座表面向线路外侧设置有横向排水坡，预制轨枕块的边缘具有倒角。本发明具有如下有益效果：针对实际工况，优化道床混凝土配合比，以减少表面浮浆层；掺加内养护材料、纤维等，提高抗裂性能；对轨枕块的形状进行边缘倒角优化，同时在施工前对预制轨枕块表面涂刷界面剂，提高轨枕块与道床混凝土间的粘结力，进而降低界面处应力集中；采用“低温入模，快速浇筑”进行现场作业，降低温差对开裂的影响。
Ballastless track in high-speed rail turnout zone and anti-cracking construction method thereof
The invention discloses a ballastless track in a high-speed rail turnout zone and an anti-cracking construction method of the ballastless track. The ballastless track in the high-speed rail turnout zone is sequentially provided with a concrete base, a slag-free ballast bed plate and a prefabricated sleeper block from bottom to top, a transverse drainage slope is arranged on the surface of the slag-free ballast bed plate towards the outer side of a line, a transverse drainage slope is arranged on the surface of the concrete base towards the outer side of the line, and chamfers are arranged on the edge of the prefabricated sleeper block. The method has the following beneficial effects: aiming at actual working conditions, the ballast bed concrete mix proportion is optimized, so that a surface laitance layer is reduced; internal curing materials, fibers and the like are doped, so that the anti-cracking performance is improved; edge chamfering optimization is conducted on the shape of thesleeper block, meanwhile, the surface of the prefabricated sleeper block is coated with an interface agent before construction, the binding power between the sleeper block and ballast bed concrete isimproved, and then stress concentration at the interface is reduced; and low-temperature mold entering and rapid pouring are adopted for field operation, and the influence of temperature difference oncracking is reduced.
本发明公开了一种高铁岔区无砟轨道及其防裂施工方法，该高铁岔区无砟轨道由下至上依次设置的混凝土底座、无渣道床板以及预制轨枕块，无渣道床板表面向线路外侧设置有横向排水坡，混凝土底座表面向线路外侧设置有横向排水坡，预制轨枕块的边缘具有倒角。本发明具有如下有益效果：针对实际工况，优化道床混凝土配合比，以减少表面浮浆层；掺加内养护材料、纤维等，提高抗裂性能；对轨枕块的形状进行边缘倒角优化，同时在施工前对预制轨枕块表面涂刷界面剂，提高轨枕块与道床混凝土间的粘结力，进而降低界面处应力集中；采用“低温入模，快速浇筑”进行现场作业，降低温差对开裂的影响。
Ballastless track in high-speed rail turnout zone and anti-cracking construction method thereof
一种高铁岔区无砟轨道及其防裂施工方法
CHEN FUXIAN (Autor:in) / TIAN ZUOHUA (Autor:in) / WANG TIANWU (Autor:in) / ZENG JIAN (Autor:in) / CHEN HAN (Autor:in) / PANG QIANFENG (Autor:in) / DING LIMING (Autor:in) / JIANG LONG (Autor:in) / GAO SHANYI (Autor:in) / SHI SHENGLIANG (Autor:in)
12.06.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
E01B
PERMANENT WAY
,
Gleisoberbau
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