Performance and Application of Adjustable Height Support

To overcome the defaults of difficult to adjust the height in existing steel supports, an adjustable height support was proposed, whose height could be adjusted in a range, to adapt to the complexity and variability of the site construction conditions, ensure the precision bearing, and improve the work efficiency. The bearing system could be divided into two parts: coarse and fine parts. Before adjusting the height, the jack should be set between the support and the support structure, and then adjusted the position of the cheese block by adjusting the knob. The application of the adjustable height support in a real project was proposed, the support arrangement locations, construction processes and the displacement, stress and strain health monitoring system were all discussed in detail, and the support resultant force was taken as the basis of the support elevation in different construction stages. The results show that the support can monitor the reaction force and adjust the height of the support in real time. For example, the maximum pressure difference of southeast abutment decreases from 2 266.8 kN before adjustment to 39.4 kN after adjustment. The bearing force value of abutments is similar, and the stress on piers and foundations tends to be uniform. It is beneficial to ensure the safety and durability of piers and foundations.