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钢筋网片在防固工程中的重要作用!

添加时间:2018-12-10      发布人:

钢筋网片被用在桥梁防固工程分析, 作为关系人类生命安全的交通要塞,钢筋网片在防固工程中是至关重要的。
  Reinforcement mesh is used in bridge anti-consolidation engineering analysis. As a traffic fortress related to human life and safety, reinforcement mesh is very important in anti-consolidation engineering.
  1.原桥主梁加固
  1. reinforcement of main girder of original bridge
  一是要使用墩顶上两孔梁端空间设置现浇横向悬臂挑梁,其上安装预制的微弯板。二是在挑梁悬臂部分架起预制的形人行道梁。两头桥孔人行道梁较主梁长,一端支承在边墩挑梁上一端支承在路堤上特设的支墩上,此举系为了防止加宽桥台。三是在人行道梁内侧的凸缘与旧桥面板间,用混凝土浇筑桥面加宽部分,桥面铺装层混凝土同时浇筑构成行车道,在桥面铺装层及桥面加宽部分,均设置了钢筋网,使全体功能加强。四是桥面伸缩缝设置在挑梁顶中心,将行车道铺装延伸搭架在挑梁上构成。
  One is to install cast-in-situ transverse cantilever beam in the space of two holes at the end of beam on pier top, and install prefabricated micro-bending plate on it. Secondly, the prefabricated pedestrian beam is erected in the cantilever part of the cantilever beam. The pedestrian beams with two bridge holes are longer than the main beams, and one end is supported on the side pier cantilever beam and the other end is supported on the special piers on the embankment. This is to prevent widening the abutment. Thirdly, between the flange of the inner side of the pedestrian beam and the old bridge deck, concrete is used to cast the widened part of the bridge deck. The concrete of the bridge deck pavement layer is concretely poured to form the carriageway. In the pavement of the bridge deck and the widened part of the bridge deck, the reinforcing steel mesh is set up to strengthen all the functions. Fourthly, the bridge deck expansion joint is set in the center of the overhanging beam, and the carriageway pavement is extended and erected on the overhanging beam.
  2.桥面清理
  2. deck cleaning
  原桥面多缺乏安稳而坚实的底层,全体性差,有必要将原桥面彻底清除,并挖除部分砂砾垫层(假如是非砂砾填料,有必要挖除,换上砂砾填料,夯实),再加铺水泥安稳砂砾底层,其上浇筑钢筋砼桥面。
  Most of the original deck lacks a stable and solid bottom, and its integrity is poor. It is necessary to completely remove the original deck and dig out part of the gravel cushion (if it is non-gravel filler, it is necessary to dig out, replace the gravel filler, compact), and then lay the cement stabilized gravel bottom layer, on which the reinforced concrete deck is poured.
  3.拓展加固
  3. development and reinforcement
  适当操控交通,边通车边拓展加固。因为可以使用原有墩台,拓展加固主要在上部构造上进行,因而可节省更多出资。只需拓展加固计划得当,亦可满意规划荷载要求。
  Proper control of traffic, while opening, expansion and reinforcement. Because the original piers and abutments can be used, the expansion and reinforcement are mainly carried out on the upper structure, so more investment can be saved. As long as the reinforcement plan is properly expanded, the planning load requirements can also be satisfied.
  4.桥台后座加固
  4. abutment reinforcement
  将桥台后座上路面除去,改成38#钢筋砼单向简支预制板,支承于两侧墙上。用直径25mm的锚固钢筋使之与侧墙相接,其上铺装砼桥面,钢筋砼板与后座填料间留有空地,以使活载压力直接效果在侧墙上,然后减去了活载引起的对侧墙的土压力,并增加侧墙抗剪才能和基底摩阻力。
  The pavement on the back seat of abutment is removed and replaced by 38 # reinforced concrete one-way simply supported prefabricated slab, which is supported on both sides of the wall. The anchoring steel bar with diameter of 25mm is used to connect the side wall. The concrete bridge deck is paved on it, and there is space between the reinforced concrete slab and the backseat filling, so that the live load pressure can be directly applied to the side wall, then the earth pressure on the opposite side wall caused by the live load is reduced, and the shear capacity of the side wall and the friction resistance of the base are increased.
  5.主拱圈加固
  5. main arch reinforcement
  原横系粱尺度偏小,横向联系差,属单薄构件,针对这一病害,将原横系梁截面尺度加大,把拱顶部分横系梁改为横隔板,以加强横向全体性,使全拱宽一起受力。因为主拱圈受力大,裂缝多,选用拱肋及拱波部分外包钢筋网并喷发砼加固拱圈截面,以提高各孔的全体刚度和承载力。
济南钢筋批发
  In view of this disease, the cross-sectional dimension of the original cross-tied beam is enlarged, and the arch top part of the cross-tied beam is replaced by the diaphragm to strengthen the transverse integrity and force the whole arch width together. Because the main arch ring has large force and many cracks, the arch rib and arch wave part are used to wrap steel mesh and spray concrete to reinforce the arch ring section, so as to improve the stiffness and bearing capacity of all holes.
  6.主梁负弯矩的加固
  6. Reinforcement of Negative Bending Moment of Main Girder
  主粱负弯矩区在一般荷载下即发生很多裂缝,其上桥面铺装层亦发生很多网裂。此种裂缝不只不美观,在实际上也会因雨水渗人主梁和翼缘板中,导致锈蚀受力钢筋,影响桥梁使用寿命。在考虑加固计划时,依据核算材料增加纵向受拉钢筋,置于原铺装层范围内,因为新规划标准的荷载负弯矩效果,桥面砼的拉应力将到达3.96MPa,选用钢纤维砼,其抗拉规划强度有或许大于此拉应力,然后保证桥面不呈现裂缝。在加固中应对负弯 区桥面铺装层选用浇筑钢纤维砼,要求其与粱顶翼缘板真正牢固连成全体。
  There are many cracks in the negative bending moment area of the main girder under general loads, and there are also many net cracks in the upper deck pavement. Such cracks are not only beautiful, but also cause corrosion of steel bars in the main girders and flange plates due to rain water, which affects the service life of bridges. When considering the reinforcement plan, the longitudinal tension reinforcement bar is added according to the accounting material and placed in the original pavement. Because of the negative bending moment effect of the new planning standard, the tensile stress of the bridge deck concrete will reach 3.96 MPa. The steel fiber concrete is selected, whose tensile planning strength may be greater than the tensile stress, and then the crack will not appear on the bridge deck. 。 In reinforcement, steel fiber concrete should be used for bridge deck pavement in negative bending area, and it should be firmly connected with the flange slab of beam roof.
  7.主粱及挂梁正弯矩区加固
  7. Reinforcement of main girder and hanging girder in positive bending moment zone
  办法是在凿去原桥面铺装层及油毛毡后,将原桥面打毛,用锚杆在原铺装层厚度范围内加一层钢筋网,然后浇筑补偿缩短自防水砼。使结构到达抗裂防渗的意图,即处理防水问题。
  The method is to cut off the original bridge deck pavement and linoleum, to wool the original bridge deck, add a layer of steel mesh with anchor rod in the thickness range of the original pavement, and then pour compensatory shortened self-waterproof concrete. To make the structure reach the purpose of crack resistance and seepage control, that is, to deal with waterproofing problems.
  以上就是钢筋网片被用在桥梁防固工程分析,济南钢筋批发等更多的产品需求可以直接点击我们的官网进行咨询:/
  Above is the steel mesh used in bridge anti-consolidation engineering analysis, Jinan steel wholesale and other more product needs can be directly clicked on our official website for consultation: /
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