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自行车棚工程施工要注意哪些技术?
来源:http://www.sdcscp.com/ 发布时间:2022-02-14
(1)某膜结构自行车棚工程钢缆采用无油钢丝带护套镀锌电缆,节点采用镀锌螺栓,节点板采用平炉顶吹氧气转炉钢铝板带。
(1) The steel cable of a membrane structure bicycle shed project adopts oil-free steel ribbon sheathed galvanized cable, the node adopts galvanized bolts, and the node plate adopts open hearth top blown oxygen converter steel aluminum strip.
(2)膜材安装工艺流程:工程开工-钢结构复验-膜机组吊装、上夹板-压板安装-膜材清洗、油漆修补-竣工验收。
(2) Membrane material installation process: project commencement - steel structure re inspection - membrane unit hoisting, upper splint - pressing plate installation - membrane material cleaning, paint repair - completion acceptance.
(3)膜材料在工厂加工后,应在现场组装。
(3) After the membrane material is processed in the factory, it shall be assembled on site.
(4)对已施工的钢结构进行整体复验,包括与膜材连接的各钢结构节点的几何尺寸、节点标高、节点方位是否符合设计图纸要求。若大于允许偏差,应及时纠正,直到膜材安装正常为止。
(4) Conduct overall re inspection on the constructed steel structure, including whether the geometric dimension, node elevation and node orientation of each steel structure node connected with membrane material meet the requirements of design drawings. If it is greater than the allowable deviation, it shall be corrected in time until the membrane material is installed normally.
(5)膜材料安装前,必须对现场进行清理,保障膜材料不脏污、不损坏。
(5) Before the installation of membrane materials, the site must be cleaned to ensure that the membrane materials are not dirty and damaged.
膜结构充电桩车棚
(6)涂膜前,必须检查涂膜材料上的位置标记,以避免涂膜位置错误。
(6) Before coating, the position mark on the coating material must be checked to avoid the wrong position of the coating.
(7)膜面固定材料和临时张拉工具应根据设计图纸和膜面安装要求分开放置。安装完成后,必须清理现场,并尽可能重新调整不平整部分。调整后,应擦拭干净,以保持膜清洁美观。
(7) Membrane surface fixing materials and temporary tensioning tools shall be placed separately according to the design drawings and membrane surface installation requirements. After installation, the site must be cleaned and the uneven part shall be readjusted as much as possible. After adjustment, wipe it clean to keep the film clean and beautiful.
膜结构的制作和安装应保障膜结构自行车棚工程达到设计规定的几何表面和预张力水平。因此,合格的制造商应充分了解3D薄膜表面形状生成的要点,并熟悉加工薄膜材料的特性。合格的安装人员应善于控制施工过程中几何结构的变化。膜结构的生产大多在工厂内完成,因此加工制造现场必须有足够的空间,保持平整、清洁,并符合一定的温湿度要求。
The fabrication and installation of membrane structure shall ensure that the membrane structure bicycle shed project reaches the geometric surface and pretension level specified in the design. Therefore, qualified manufacturers should fully understand the key points of 3D film surface shape generation and be familiar with the characteristics of processed film materials. Qualified installation personnel shall be good at controlling the changes of geometric structure during construction. The production of membrane structure is mostly completed in the factory, so the processing and manufacturing site must have enough space, keep flat and clean, and meet certain temperature and humidity requirements.
轧制膜材料在工厂被切割成膜片,这一良好的工艺过程需要专用计算机来完成,但目前我国的生产仍依靠人工放样和切割。由于膜材料将在安装过程中通过施加初始预张力而拉长,并且随着时间的推移会发生蠕变,因此应根据所用膜材料的特性和上述因素的影响来确定膜的收缩率。膜片通过高频焊机进行热封加工成薄膜单元。基于聚酯纤维或玻璃纤维的薄膜材料应使用不同的焊接机。各种膜材料的连接方式和热封过程也不同。
Rolled film materials are cut into diaphragms in the factory. This good process needs a special computer to complete, but at present, China's production still depends on manual setting out and cutting. Since the membrane material will be elongated by applying initial pretension during installation and creep will occur over time, the shrinkage of the membrane should be determined according to the characteristics of the membrane material used and the influence of the above factors. The diaphragm is heat sealed by a high-frequency welder and processed into a film unit. Different welding machines shall be used for film materials based on polyester fiber or glass fiber. The connection mode and heat sealing process of various membrane materials are also different.
膜单元运输到膜结构自行车棚的施工现场,在其支撑部件(如桅杆、刚性骨架或电缆)上打开包装和展开。然后,膜单元应连续安装到位,并尽快将膜单元固定在边缘构件或钢缆上,因为此时膜结构无法承受荷载,较为容易受到外部气候的破坏。在固定膜单元的过程中,膜表面实际上已经开始施加预张力和张力。
The membrane unit is transported to the construction site of the membrane structure bicycle shed, and its supporting parts (such as mast, rigid skeleton or cable) are unpacked and unfolded. Then, the membrane unit shall be continuously installed in place, and the membrane unit shall be fixed on the edge member or steel cable as soon as possible, because at this time, the membrane structure cannot bear the load and is more vulnerable to the damage of the external climate. In the process of fixing the membrane unit, the membrane surface has actually begun to apply pretension and tension.
为了使膜结构达到预定的形状,还需要使用专用施力机逐步均匀地对其施加预张力。预张力在膜结构中起着相当重要的作用。由于膜材料被拉扯,膜表面减少或避免可能导致积水的褶皱和凹坑。
In order to make the membrane structure reach the predetermined shape, it is also necessary to use a special force application machine to gradually and evenly apply pretension to it. Pretension plays an important role in membrane structure. As the membrane material is pulled, the membrane surface reduces or avoids folds and pits that may cause ponding.
重要的是,预张力可以控制由风引起的膜表面颤振。膜表面是否能达到设计的预张力值仍然是一个难题,因为目前还没有能够准确测量膜表面张力的仪器。在实际工程中,我们只能以检查施力点的位移是否达到设计值为控制标准,抽查代表施力点的应力值,这是检验施工结果与设计假设一致性的重要手段。
Importantly, the pretension can control the membrane surface flutter caused by wind. Whether the membrane surface can reach the designed pretension value is still a difficult problem, because there is no instrument that can accurately measure the membrane surface tension. In practical engineering, we can only check whether the displacement of the force application point reaches the design value as the control standard, and spot check the stress value representing the force application point, which is an important means to test the consistency between the construction results and the design assumptions.
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