从1964年以来,第三冶金建设公司用砖垫法施工了六个沉井。六个沉井的施工概况见表1。砖垫法比过去采用的木垫架法优越,为国家节约了木材近300立方米。用木垫架(图2)不但加工制作费工,特别在拆垫时,常常因为最后几根难以拆出,以至影 Since 1964, the third metallurgical construction company has constructed six open caissons using the brick pad method. A summary of the construction of the six open caisson is shown in Table 1. The brick mat method is superior to the wood mat method used in the past and saves nearly 300 cubic meters of wood for the country. The use of wooden mats (figure 2) not only makes the laborious work, especially when disassembling, often because the last few pieces are difficult to be removed, and even the shadow