高层建筑地下人防工程处理

对于高层建筑物地下人防工程提出有效的处理措施 ,即采用两端挖竖井用混凝土填堵 ,中间钻孔灌实的方法 ,且证明是安全可靠的。

砌块建筑墙体裂缝的防治

近年来,我国墙体材料改革工作深入开展,新型墙体材料逐步取代了传统的“泰砖汉瓦”,有效地保护了耕地和环境,提高了社会和经济效益。混凝土空心小砌块是各地发展新型墙体材料的首选产品。由于发展速度较快,个别生产企业、设计人员、施工单位不是很熟悉小砌块的特点和规律,因此,砌块建筑墙体产生裂缝的现象时有发生。

Construction of Micropiles Using Pressure Techniques

This paper discusses the technique of casting concrete ofmicropiles with pressures and the consequence of comparisons with normal way of casting concrete （casting with gravity）. Preliminary geotechnical studies have been made in specific area in Sudan to predict the soil parameters and then an experimental work has been done for an estimated number ofmicropiles with different diameters and different techniques of placing concrete with various amount of pressure. This study was carried out to learn the usefulness of this technique in the field of structural foundations in Sudan. Capacities of micropiles were compared in cases of non-pressure casting （normal way of casting concrete） and pressure casting. Through the results, it was found that the entry of pressure factor in the operation of casting concrete increases the capacities of micropiles. The increased value of ultimate load depends on the amount of pressure applied.