jxmjzz 发表于 2021-12-15 13:37:28
混凝土检查井钢模具主要损坏问题详细叙述有：检查井模具混凝土板浇筑时，在模板的四周及边角处，由于没有控制好灌溉的虚铺高度会出现少料现象，振捣时若未及时补填筑混凝土混合料，或振捣时间不够，振捣棒插点距边角偏大等均会出现边角振捣不密实，特别是在设有拉杆及传力杆的边角处，造成强度达不到设计要求的问题比较严重；混凝土混合料振捣密实后，在局部边板校正模板或胀缝板位置时，常有缺料的现象发生，补填料后应根据作业面实际情况进行重新振捣，否则将会影响混凝土边角的强度；切缝前要校正好切缝机，带故障的切缝机严禁进行切缝作业，机械的跑偏会导致打边和损坏混凝土道面的外观质量，注意掌握好切缝的时机，一般待混凝土强度达到时切缝的效果较好，过早切缝容易造成掉边掉角；切刀缝时因未拆模板，一般都切不到边，拆除模板后未切缝处正好有一块骨料石子埋在缝的中间，会将边角混凝土不规则的拉断出现掉边或掉角
The main damage problems of the steel mold of the concrete inspection well are described in detail as follows: during the pouring of the mold concrete slab of the inspection well, there will be less material around the formwork and at the corners due to the failure to control the virtual paving height of irrigation. If the concrete mixture is not filled in time during vibration, or the vibration time is not enough, and the insertion point of the vibrator is too large from the corners, the corners will not be vibrated tightly, Especially at the corners with tie rods and dowel bars, the strength can not meet the design requirements; After the concrete mixture is vibrated and compacted, when the position of the formwork or expansion joint plate is corrected at the local side plate, there is often a lack of material. After filling, it shall be vibrated again according to the actual situation of the working face, otherwise the strength of the concrete corner will be affected; The joint cutting machine shall be calibrated before joint cutting. The joint cutting machine with fault is strictly prohibited from joint cutting. The deviation of the machine will lead to edge striking and damage the appearance quality of the concrete pavement. Pay attention to grasp the time of joint cutting. Generally, the effect of joint cutting is good when the concrete strength reaches, and premature joint cutting is easy to cause edge and corner falling; When cutting the joint, because the formwork is not removed, it is generally impossible to cut the edge. After removing the formwork, there is an aggregate stone buried in the middle of the joint, which will break the edge and corner concrete irregularly, resulting in edge or corner loss
|
|
