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现场静载压桩试验表明，桩端压力注浆桩极限承载力比普通钻孔灌注桩有明显提高，相应极限位移大大减少；比桩底有虚土的注浆桩端承载力和极限承载力提高效果更为显著。桩侧注浆桩单位面积摩阻力比注浆前增加１倍左右。压力注浆提高桩承载力的主要原因是：压力注浆使桩端、桩周土层压密、劈裂、渗透填充、置换固结，改变了原状土的物理力学性质和桩与土的相互作用；同时桩端桩径扩大，增加了桩与土的接触面积。
The results of on-site static pressure pile test show that the ultimate bearing capacity of grouting pile at pile tip is obviously higher than that of ordinary bored pile, and the corresponding limit displacement is greatly reduced. Compared with the end bearing capacity and ultimate bearing capacity Improve the effect is more significant. The pile grouting pile friction per unit area increased about 1 times before grouting. Pressure grouting to improve the bearing capacity of the main reasons are: pressure grouting so that the pile end, the soil around the pile compaction, splitting, infiltration and filling, replacement and consolidation, changing the undisturbed soil physical and mechanical properties of the pile and soil mutual Role; pile diameter at the same time end to expand, increasing the contact area of the pile and soil.