古近系红层物理力学特性及不同开挖方式下的灌浆效果

Physical and Mechanical Properties of Paleogene System Red Layer and Analysis of Grouting Effect under Different Excavation Method

以紫红色泥岩为主的常(德)-桃(源)盆地古近系红层强度低,遇水易软化,失水易崩解。在介绍桃源水电站古近系红层物理力学性质的基础上,总结分析在爆破与凿岩机不同开挖方式下基础固结灌浆成果表明,两种不同开挖方式下岩体固结灌浆的单耗差异悬殊,对处于相近地层的其他工程具有一定的参考和借鉴意义。

The main content of the Paleogene system red layer in Changde-Taoyuan basin is purple mudstone, which is easy to soften when watering and easy to disintegrate when drying. The physical and mechanical properties of Paleogene system red layer in Taoyuan Hydropower Station are introduced firstly, and then the results of foundation consolidation grouting under two excavation ways of blasting and rock drilling are analyzed. The unit grout consumptions of two excavation ways have a great difference. This study can provide a reference to the projects with similar geological conditions.