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如何预防济南木廊架的木材开裂?

来源:http://www.jnajgc.com 时间:2020-12-25

济南木廊架大多运用在条件较为恶劣的户外,其开裂和变形会受其他多种因素影响,如放置地点、阳光照射、木质因雨淋等自然现象所形成的湿度等易造成变形和开裂.对自然条件我们无法改变,但是在我们可以在施工中加以控制避免,济南木廊架木材的表面是质量可靠、性能好的部分,所以应尽可能的减少对防腐木成品进行打磨和剖面.这样可以有效的减少和延缓变形和开裂的时间周期.
Most of the wooden galleries in Jinan are used outdoors in bad conditions, and their cracking and deformation are affected by many other factors, such as the place of placement, sunlight, humidity caused by natural phenomena such as rain and so on, which are easy to cause deformation and cracking, The wood surface of Jinan wooden gallery is the part with reliable quality and good performance, so it is necessary to reduce the grinding and profile of antiseptic wood products as far as possible. This can effectively reduce and delay the time cycle of deformation and cracking
防腐木在使用过程中会发生表裂、内裂、端裂.表裂主要是由于介质温度太高、湿度低等原因造成.如要避免应及时调整干燥基准,降低干球温度,提高湿度,必要时可做表面喷蒸处理.内裂一般发生在干燥的后期阶段,是由于木材表面硬化严重,内部所受的拉应力大于防腐木材的横纹抗拉强度时发生的.要防止,应在干燥过程中多进行调湿处理,降低后期温度,或干燥前将防腐木材进行改性处理.防止端裂在装堆时,外端的一根隔条外侧面一定要和木材的端面在一个平面上,以减少木材端部水分的蒸发面积.
Surface crack, inner crack and end crack can occur in the process of using antiseptic wood. Surface crack is mainly caused by high temperature and low humidity of medium. If it is to be avoided, the drying standard should be adjusted in time, the dry bulb temperature should be reduced, and the humidity should be increased. If necessary, surface steaming can be done. The inner crack usually occurs in the later stage of drying, because the wood surface hardening is serious, When the internal tensile stress is greater than the transverse tensile strength of the preservative wood, the moisture control treatment should be carried out during the drying process to reduce the temperature in the later stage, or the preservative wood should be modified before drying to prevent end cracking. When stacking, the outer surface of a partition strip at the outer end must be in the same plane with the end face of the wood, so as to reduce the evaporation area of water at the end of the wood
在木廊架的施工中,如果可能的话,应该尽可能地使用现有的防腐木尺寸及形状,对浸渍材所做的任何加工,如钻孔、精刨、削切等会使浸渍材的使用寿命缩短.建议在施工中用热镀锌及的钉子或螺丝做连接及安装.在连接时应预先钻孔,这样可以避免开裂,胶水则应是防水的.
In the construction of wooden Gallery, if possible, the existing size and shape of anticorrosive wood should be used as much as possible. Any processing of impregnated material, such as drilling, fine planing and cutting, will shorten the service life of impregnated material. It is suggested that hot-dip galvanized nails or screws should be used for connection and installation in construction. Drilling should be done in advance when connecting, so as to avoid cracking, Glue should be waterproof
尽量使用二级以上的防腐木,因为其含水率为20%以下,可以有效地防止开裂与变形.若一定要使用含水率大于20%的等级,则在施工现场,木方的叠放应做到每层有10-20MM的缝隙,并在施工前能放置于现场72小时以上,并在此期间防止阳光的直接照射.这样可以减少木材开裂的可能性.
Try to use more than grade II anticorrosive wood, because its moisture content is less than 20%, which can effectively prevent cracking and deformation. If the moisture content is more than 20%, then in the construction site, the stacking of wood should be 10-20 mm gap in each layer, and can be placed in the site for more than 72 hours before construction, And during this period to prevent direct sunlight. This can reduce the possibility of wood cracking