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一近年来不仅发现已建的高层建筑箱形基础有出现裂缝的现象,而且有的箱形基础的钢筋混凝土结构还在施工过程中就产生裂缝问题。有的是属于初期型裂缝,有的是属于中长期型裂缝。由于箱形基础一般都作为防护工程范畴的人防地下室利用,对于它的裂缝问题,如果因此而产生地下渗漏水影响到地下室平战结合的正常使用,这才会引起有关工程技术人员从防水补漏的角度予以考虑和重视。至于结构产生的裂缝在使用荷载作用下或在地震动荷载作
In recent years, it has not only been found that there are cracks in the box foundations of high-rise buildings that have been built, but also some box-shaped reinforced concrete structures have cracks in the construction process. Some are early-type cracks, and some are medium and long-term cracks. Since the box foundation is generally used as a civil air defense basement in the protection engineering category, if it causes underground leakage water to affect the normal use of the basement combined with the warfare, it will cause the relevant engineers and technicians to make up From the perspective of consideration and attention. As for the cracks produced by the structure under the use of load or under ground motion