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一般较小的基础工程,虽然在事先不必进行详细的验算和试验,就可照标准图套用;但遇到地基较为复杂的基础工程,就有必要进行一些小型的试验了。 1957年我们在修建一座中型半永久式桥梁时,遇到了极为复杂的地基,必须通过承傤试验来校核地基土壤承傤力,但当时工地没有精密仪器,而且基坑又小,不能采用一般的试验方法。后经大家研究,采用了杠杆法和游标读数法代替一般承傤试验中的千分仪来读出沉陷数,并简化了装置。这个方法的优点是:游标尺容易
In general, the smaller basic works may be applied according to the standard drawings without having to carry out detailed checking and testing in advance. However, it is necessary to carry out some small-scale tests on the more complex foundations. When we built a medium-sized semi-permanent bridge in 1957, we encountered extremely complex foundations and we had to check the foundation soil for bearing capacity by carrying out tests. However, at that time, there was no precision instrument at the site and the foundation pit was small. experiment method. After the study by everyone, using the lever method and the cursor reading method instead of the general bearing test of the dial indicator to read the number of subsidence, and simplify the device. The advantage of this method is: Vernier scale easy