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近几年来新建的立井多用井塔提升。一般情况下每座井塔的重量约为7000～8000吨,其重量靠基础传给井筒周围的地基。由于井塔提升的要求,一般平面布置比较集中,因而基础离井筒比较近,所以设计井筒时必须考虑井塔基础对井壁的影响。关于附加荷载对井壁影响的计算方法,目前取用的计算简图是非常粗糙的。理论根据也不充分,虽然过去设计的井壁,并未因此发生问题,但也不能说以后就不会发生事故。为此,现对这一问题作如下讨论。
In recent years, newly-built shafts have been upgraded with wells. In general, the weight of each well tower is about 7,000-8,000 tons, and its weight is transmitted from the foundation to the foundation around the wellbore. Due to the requirement of lifting towers, the layout of the towers is generally concentrated, and therefore the foundation is relatively close to the wellbore. Therefore, the wellbore foundation must be considered when designing the wellbore. With regard to the calculation method of the effect of the additional load on the wellbore, the currently available calculation diagram is very rough. The theoretical basis is not sufficient. Although the well wall designed in the past did not cause problems, it cannot be said that accidents will not occur in the future. For this reason, we now discuss this issue as follows.