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十字交叉带形基础用于下列地区:(1)很厚的软弱土及中等土地区;(2)地震区;(3)大孔性土地区。这种基础能承受较大荷重,适用于多层房屋及工业建筑物。笔者在五十年代中期曾设计过太钢耐火厂(处在Ⅱ级大孔上和七度地震区)的多跨多层框架(有一跨挂有贮矿槽),基础采用十字交叉带形基础,使用至今,情况良好。对十字交叉带形基础的计算方法,有必要进行系统的总结。目前比较实用的计算方法是采用基床系数假说,利用М·И·葛尔布诺夫—伯沙道夫的有关表格,算出带形基础上各点的 P(土压力)、Q(切力)、M(弯矩)。下文以实用为目的,进行系统的总结,可供初次参加十字交叉带形基础的设计者参考。
Cross-belt foundations are used in the following areas: (1) thick soft soils and medium-earth soil areas; (2) earthquake areas; and (3) large-porosity soil areas. This foundation can withstand large loads and is suitable for multi-storey houses and industrial buildings. In the mid-fifties, the author designed a multi-span multi-story frame (with a spanning pit) in the Taiyuan Refractory Factory (in the second-order large-hole and seventh-degree earthquake area). The foundation is based on a cross-shaped belt. , It is in good condition to use so far. It is necessary to systematically summarize the calculation method for the cross-shaped strip foundation. The current more practical method of calculation is to use the bed-bed coefficient hypothesis. Using the relevant tables of М. I. Grünov-Bassadaf, calculate the P (earth pressure) and Q (cutting force) at each point on the banded basis. , M (bending moment). The following is a summary of the system for practical purposes. It can be used as a reference for designers who are initially involved in cross-cutting belts.