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郑州铁路局科研所于1985年8月29日至10月24日对大同铁路机车工厂两栋家属楼的基础进行了加固。该家属楼房位于大孔性新黄土中,由于地层不均匀沉降,造成房屋基础下沉,墙体开裂,门窗开启困难等病害。这次采用高压旋喷桩在室内外同时加固,共压桩250多根,桩体长度5～6m,桩直经φ0.6～0.8m,抗压强度为87kgf/cm~2。加固后,达到了预期效果。
Zhengzhou Railway Bureau Institute of Science and Technology in August 29, 1985 to October 24, Datong Railway Locomotive Works built on the basis of two fortifications. The families of the building is located in the new macroporous loess, due to uneven formation settlement, resulting in housing foundation sinking, wall cracking, windows and doors open difficult diseases. This time using high-pressure rotary jet grouting at the same time indoor and outdoor reinforcement, a total of more than 250 pressured pile, pile length of 5 ~ 6m, pile straight through φ0.6 ~ 0.8m, compressive strength of 87kgf / cm ~ 2. After reinforcement, to achieve the desired results.