The inspection results indicated that the uniform diameter of pure sand-gravel columns in mud and silt reached 55~82 cm, and the boring core sample strength of grouting column reached 4.3~11.4 MPa at the age of 28 d.

• 检测结果表明；挤入淤泥和粉土中的纯砂砾柱平均直径达到55~82cm；28d龄期时水泥砂砾灌浆体取芯的抗压强度达到4.；3~11