Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction process for triangular area of open-web rigid frame bridge
The invention provides a construction process for a triangular area of an open-web rigid frame bridge. Suspension casting downward-bent steel bundles are arranged in the sections of webs of the firstto nth beam sections of the upper chord. Vertical force in upper chord section suspension casting construction is provided through the lower bent steel bundle; the sections provided with the downwardbent steel bundles can achieve balanced cantilever construction, the number of the supporting stand columns is further optimized, the construction operation safety risk of the supporting stand columnsof the (n-1) sections is avoided, the safety guarantee is improved, the construction period is shortened, and the complex system stress condition of a triangular area is optimized. Supporting stand columns are only arranged between n-m beam sections of the upper chord and the lower chord to support the n-m beam sections. The upper chord hanging basket does not cross the stand column; the mobile end is downwards embedded in the bottom fixed section, a fixed stand column is changed into a telescopic adjustable supporting stand column, the problems of conflict between a hanging basket bottom basket and the stand column, complex procedures of refitting the hanging basket bottom basket and the like are solved, cast-in-place concrete wet weight is completely borne by the hanging basket, the stress condition of a steel pipe stand column and a buckle cable is improved, and the overall safety reserve of the structure is improved.
本发明提供了一种空腹式刚构桥三角区施工工艺，在上弦1~n号梁段腹板截面中布设悬浇下弯钢束，通过下弯钢束提供上弦节段悬浇施工中的竖向力，布设有下弯钢束的节段自身即可实现平衡悬臂施工，进而优化了支撑立柱数量，避免了该（n‑1）个节段的支撑立柱施工作业安全风险，提高了安全保障，节约工期，优化了三角区复杂的体系受力情况。仅在上弦、下弦n~m号梁段之间设置支撑立柱支撑，上弦挂篮未越过立柱前，活动端头下嵌在底部固定段内，将固定立柱改为伸缩可调支撑立柱，避免挂篮底篮与立柱的冲突及挂篮底篮改装等工序繁杂问题，现浇混凝土湿重完全由挂篮承受，改善了钢管立柱及扣索受力情况，提高了结构的整体安全储备。
Construction process for triangular area of open-web rigid frame bridge
The invention provides a construction process for a triangular area of an open-web rigid frame bridge. Suspension casting downward-bent steel bundles are arranged in the sections of webs of the firstto nth beam sections of the upper chord. Vertical force in upper chord section suspension casting construction is provided through the lower bent steel bundle; the sections provided with the downwardbent steel bundles can achieve balanced cantilever construction, the number of the supporting stand columns is further optimized, the construction operation safety risk of the supporting stand columnsof the (n-1) sections is avoided, the safety guarantee is improved, the construction period is shortened, and the complex system stress condition of a triangular area is optimized. Supporting stand columns are only arranged between n-m beam sections of the upper chord and the lower chord to support the n-m beam sections. The upper chord hanging basket does not cross the stand column; the mobile end is downwards embedded in the bottom fixed section, a fixed stand column is changed into a telescopic adjustable supporting stand column, the problems of conflict between a hanging basket bottom basket and the stand column, complex procedures of refitting the hanging basket bottom basket and the like are solved, cast-in-place concrete wet weight is completely borne by the hanging basket, the stress condition of a steel pipe stand column and a buckle cable is improved, and the overall safety reserve of the structure is improved.
本发明提供了一种空腹式刚构桥三角区施工工艺，在上弦1~n号梁段腹板截面中布设悬浇下弯钢束，通过下弯钢束提供上弦节段悬浇施工中的竖向力，布设有下弯钢束的节段自身即可实现平衡悬臂施工，进而优化了支撑立柱数量，避免了该（n‑1）个节段的支撑立柱施工作业安全风险，提高了安全保障，节约工期，优化了三角区复杂的体系受力情况。仅在上弦、下弦n~m号梁段之间设置支撑立柱支撑，上弦挂篮未越过立柱前，活动端头下嵌在底部固定段内，将固定立柱改为伸缩可调支撑立柱，避免挂篮底篮与立柱的冲突及挂篮底篮改装等工序繁杂问题，现浇混凝土湿重完全由挂篮承受，改善了钢管立柱及扣索受力情况，提高了结构的整体安全储备。
Construction process for triangular area of open-web rigid frame bridge
一种空腹式刚构桥三角区施工工艺
SUN KEQIANG (Autor:in) / LI SONG (Autor:in) / LI BAIFU (Autor:in) / WEI YULIN (Autor:in) / WANG JIAJUN (Autor:in) / CHEN BO (Autor:in)
26.06.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
E01D
BRIDGES
,
Brücken
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