粘度渐变型浆液渗透注浆灌注均匀砂层计算方法的研究

A STUDY ON CALCULATION METHOD OF PENETRATION THEORY FOR CONFORMING SAND LAYER

目前的砂层注浆公式主要是球面扩散公式和柱面扩散公式，在这两公式中对灌注材料在灌注过程中粘度的变化均无考虑，而大多数浆液材料其粘度都是随时间变化的，且这种变化较大，所以注浆计算时忽略浆液粘度变化的做法欠妥。本论妤导出的理论计算公式考虑灌注过程中浆液粘度随时间的变化，从而消除现在只以初始粘度作为计算参数所造成的计算误差，使理论计算结果与工群实际更吻合。均匀砂层在白然界中有着广泛的分布，其本身有着良好的几何特性，本文根据颗粒均匀砂层的特性，把颗粒均匀砂层注浆的计算公式加以简化，给卅运用计算机Matlab软件通过一次总体试验就能够推断仟意施工条件下浆液粘度与时间函数关系的方法，从而避免每次施工都实测浆液粘度带来的麻烦，节约工程造价。

The present theory formula for calculating the diffusive area of serum mainly covers spherical diffusive formula and cylindrical diffusive formula. In these theory formulas, the change of serum＇s viscosity in the process of injecting sand layer is not considered. It is well known that most of serum＇s viscosities varies with time. The theory formula for calculating the diffusive area of serum is deduced and obtained. The theory formula considers the change of serum＇s viscosity for the process of injecting sand layer. Thus, the calculation errors are removed that exist in present calculation, which are caused by assuming that the viscosity is unchangeable. The results that are achieved from the theory formula match well. with that of field test. The conforming sand layer widely exist in nature, and it has good geometrical property. According to the property of conforming sand layer, the theory formula for conforming sand layer is simplified and the methods of achieving the function between serum＇s viscosity and time are presented. The method can avoid the unfavorable matter that the serum＇s viscosity must be measured in each construction. Therefore, the costs for engineering can be considerably saved.