砂质边坡稳定性差，常规防护措施的防护效果较差。为了有效地对砂质边坡进行防护，笔者研制了一种新型固砂剂——TD–1。为了验证TD–1的固砂效果，笔者进行了配比优化试验、渗透试验、干湿循环试验和现场试验。试验结果表明：在磷酸硅、硅酸锂、硅溶胶掺入比例相同的条件下，固砂试样的强度随钾水玻璃模数的增加而增大；钾水玻璃的最佳添加量为固化砂质量的3%；加入改性剂的试样，强度有明显的增长；使用低模数钾水玻璃的试样，渗透能力相对更好；随着干湿循环次数的增加，试样的强度逐渐下降，经过3次循环之后，试样的强度基本趋于稳定。TD–1固砂剂还可与客土喷播技术结合使用，进行边坡绿化防护，固化产物有利于植物生长。

The stability of sandy slopes is poor, as are the protective effects of conventional protection measures. To effectively protect sandy slopes with chemical sand consolidation technology, a new type of sand consolidation agent, TD-1, was developed. In order to study the effect of sand consolidation, proportion optimization tests, penetration tests, wetting-drying cycle tests, and field tests were carried out. The results showed that the strength of the sand samples increases with the increase in the potassium water glass modulus when the ratios of the incorporated silica phosphate, lithium silicate, and silica sol remain the same; the optimum amount of potassium water glass added was 3 % of the solidified sand. The strength of the samples containing the modifier obviously increases, and the permeability of samples with low-modulus potassium water glass is relatively better; the strength of the samples decreases gradually with the increase in the wetting-drying cycle index, and after three cycles, the strength tends to be stable. TD-1 can be used with soil spraying technology for slope greening protection, and the solidified product is good for plant growing.