现在很多城市道路中的井盖模具都出现了下沉的情况，那么井盖下沉是什么原因造成的呢，有什么影响呢，下面咱们了解下井盖下沉塌陷的原因有哪些吧。
Now many city roads in the well cover mold are sinking, so what is the cause of the well cover sinking? What is the impact? Let's understand the reasons for the well cover subsidence.
1、井盖模具产品质量问题，选用的井盖超出自身所设计承受的荷载，选用的井盖质量不合格。井盖的安装施工问题，井盖及井壁结构设计尺度低，其结构层无加固加强设计等。
1. The product quality of compound well cover mould is poor. The selected well cover exceeds the designed load, and the quality of the selected well cover is unqualified. The problems of installation and construction of well cover, low design scale of well cover and shaft wall structure, no reinforcement design for its structural layer, etc.
2、井盖模具底座加固施工不规范，导致井盖与路面不平，框架破裂、甚至井盖寿命降低破损。井盖安装不规范，施工人员不按规定要求安装。
2. The nonstandard reinforcement construction of the well cover base leads to the uneven of the well cover and the road surface, the fracture of the frame and even the reduction of the service life of the well cover. The installation of well cover is not standard, and the construction personnel do not install according to the requirements.
3、由于构筑物沉降速度随时间而减缓直至停止沉降，因此在道路投入使用较长时间后井周围沥青破坏并不是窨井下沉造成的，应为井盖模具在****荷载作用下，不断发生弹性变形。
3. Because the settlement speed of the structure slows down with time until the settlement stops, the asphalt damage around the well is not caused by the sinking of the inspection well after the road is put into use for a long time. It should be the elastic deformation of the well cover mold under the long-term load.
4、井圈高层控制不****使井盖模具与井圈混凝土之间间隙过大，是加剧这种情况发生的主要原因，井圈混凝土未按设计厚度、宽度施工，混凝土振捣不实。
4. The main reason for this situation is that the gap between the well cover and the concrete of the well circle is too large due to the inaccurate control of the high-rise of the well circle. The concrete of the well circle is not constructed according to the design thickness and width, and the concrete vibration is not solid.
