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钢接头结构优化(二)-江门艾瑞精密机械经验分享

来源:本站 时间:2019-03-27 11:29:45 浏览次数: 78

[导读]: 钢接头的初步设计中内外圈面板分块较多,以钢接头顶墙某段区域为例,在2.2 米的长度上(两隔板净距),内外圈连接钢板分块。钢接头外圈有6 块钢板,它们之间通过T 肋现场焊接连接;在隧道的纵向上,它们与相邻管节的钢帽以及最终接头的钢结构焊接。

钢接头的初步设计中内外圈面板分块较多,以钢接头顶墙某段区域为例,在2.2 米的长度上(两隔板净距),内外圈连接钢板分块。钢接头外圈有6 块钢板,它们之间通过T 肋现场焊接连接;在隧道的纵向上,它们与相邻管节的钢帽以及最终接头的钢结构焊接。钢接头的内圈也有6 块钢板,通过L肋现场连接;在隧道的长度方向上,它们与相邻管节的钢帽以及最终接头的钢结构焊接。经统计在2.2 米长的范围内,焊缝长度就达到了约25 米长,整个钢接头的的焊缝长度通过测算共计达4200 米。

In the preliminary design of the steel joint, the inner and outer ring panels are divided into many pieces. Taking a section of the steel overhead wall as an example, the inner and outer ring connection plates are divided into pieces on the length of 2.2 meters (the net distance between the two partitions). There are 6 steel plates in the outer ring of the steel joint, which are connected by t-rib field welding. In the longitudinal direction of the tunnel, they are welded with the steel cap of the adjacent pipe joints and the steel structure of the final joint. The inner ring of the steel joint also has 6 steel plates, which are connected on site through L ribs. In the direction of the length of the tunnel, they are welded to the steel cap of the adjacent pipe joints and the steel structure of the final joint. According to statistics, the length of the weld reaches about 25 meters in the 2.2-meter long range, and the total length of the weld of the entire steel joint reaches 4200 meters through calculation.

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经过初步评估,我们在保证钢结构整个结构受力性能不下降的前提下,采取以下方法对钢接头连接钢板的分块进行重新划分,以降低现场焊接工作量,同时保证焊接质量更可控。

(1)钢接头的连接钢板,隔板关键几何定位尺寸,板厚材质等保持不变;

(2)钢接头在隧道横截面包括连接钢板,隔板等上关键几何定位尺寸保持不变;

(3)减少钢接头内圈,外圈连接钢板分块,并且T 肋,L肋均用扁钢代替。

After the preliminary evaluation, on the premise of ensuring that the mechanical performance of the whole structure of the steel structure does not decline, the following methods are adopted to repartition the steel joint connecting steel plate, so as to reduce the on-site welding workload and ensure that the welding quality is more controllable.

(1) the connecting steel plate of the steel joint, the key geometric positioning size of the separator and the thickness and material of the plate shall remain unchanged;

(2) the key geometric positioning dimensions of the steel joints in the tunnel cross section, including the connection plate and the diaphragm, remain unchanged;

(3) reduce the steel joint inner ring, outer ring connection plate block, and T rib, L rib are replaced with flat steel.

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钢接头连接钢板分块经过调整后,同样以前述钢接头某段2.2 米长范围内的连接钢板为例。

钢接头外圈有2 块钢板,它们通过对接焊接连接;在隧道的纵向上,它们与相邻管节的钢帽以及最终接头的钢结构焊接。

钢接头内圈仅有1 块钢板,它与相邻连接的钢板直接对接焊接;在隧道的纵向上,它与相邻管节的钢帽以及最终接头的钢结构焊接。经测算,在2.2 米长的范围内,其焊缝长度约为12 米长(同样未考虑隔板的焊接),与连接钢板分块调整前相比,焊缝长度减少50%以上,整个项目的焊缝长度减少到2000 米。

After adjustment, the steel joint connecting steel plate is also taken as an example.

The outer ring of the steel joint has two steel plates, which are connected by butt welding. In the longitudinal direction of the tunnel, they are welded with the steel cap of the adjacent pipe joints and the steel structure of the final joint.

There is only one steel plate in the inner ring of the steel joint, which is directly butt welded with the adjacent steel plates. In the longitudinal direction of the tunnel, it is welded with the steel cap of the adjacent pipe joints and the steel structure of the final joint. According to the calculation, in the range of 2.2 meters, the length of the welding seam is about 12 meters long (also without considering the welding of the baffle plate). Compared with the connecting steel plate before the block adjustment, the length of the welding seam is reduced by more than 50%, and the length of the welding seam of the whole project is reduced to 2000 meters.

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