论文部分内容阅读
塑性混凝土弹模低、变形大,其能较好地适应地基沉降,因而在水利水电工程防渗墙施工中得到了广泛应用。在陆丰核电厂围堰防渗工程中,为了充分利用现场资源,降低工程成本,拟采用石渣粉代替部分或全部石子和河沙进行塑性混凝土防渗墙配合比设计。通过塑性混凝土性能试验对各项技术指标进行了测定,并通过注水试验和孔内摄像对配合比方案的现场防渗效果进行了检测。结果表明,在砂率保持不变的情况下,随着膨润土掺量的增加,塑性混凝土防渗墙的抗渗性能大幅提高,强度只存在小幅度降低,满足工程对塑性混凝土各项性能指标的要求,且塑性混凝土防渗墙成墙质量完好。这验证了石渣粉作为骨料的配合比方案的可行性。
Plastic concrete mold low deformation large, it can better adapt to the foundation settlement, and therefore in the construction of cut-off walls of water conservancy and hydropower projects has been widely used. In Lufeng Nuclear Power Plant cofferdam seepage control project, in order to make full use of on-site resources and reduce the cost of the project, it is proposed to use gravel powder instead of part or all of the gravel and sand for plastic concrete cutoff wall mix design. Through the plastic concrete performance test of various technical indicators were measured, and through the water injection test and hole imaging with the ratio of the scheme of anti-seepage effect were tested. The results show that under the condition of constant sand rate, the impermeability of plastic concrete cutoff wall increases with the increase of bentonite content, and the strength decreases only slightly, which meets the requirements of various performance indexes of plastic concrete Requirements, and plastic concrete impervious wall into a wall of good quality. This verifies the feasibility of mixing the gravel powder as aggregate.