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在矿山立井井筒的支护形式上,由于其特殊的施工条件与受力状态,普遍采用混凝土现浇作永久支护。显然,作为这一工艺的关键——模板问题,就突出地表现出来了。相当一段时期以来,一般矿井均采用金属活动模板作为浇注模具,这是比较成功的理想的方法。但在实际施工中确难免暴露了一些值得磋商的不足之点,有待于更进一步探讨。例如模板变形问题;一般一套12块弧形板拼成的金属活动模板作下行式浇灌时,连续浇灌距离在150米以上一般就变形厉害,不得不停止工作,从工作面撤上地面整形,从
In the form of mine shaft wellbore support, due to its special construction conditions and stress conditions, cast-in-place concrete is generally used for permanent support. Obviously, the key issue of this process, the template problem, has emerged prominently. For quite some time, the general mines have used metal movable formwork as casting moulds, which is an ideal method for comparison. However, in actual construction, it is difficult to avoid exposing some deficiencies that are worthy of consultation. It remains to be further discussed. For example, the problem of deformation of the template; when a set of 12 metal plates made of curved plates are used for down-flow watering, the continuous watering distance of more than 150 meters is generally deformed badly, and it is necessary to stop work and remove the ground from the work surface. From