柔性混凝土是应用在三峡二期围堰防渗墙的一种新型柔性材料，由于围堰防渗墙在上下游水头差的作用下，发生弯曲变形，易产生拉裂破坏通过极限抗拉强度试验、围压作用下的拉伸试验和抗弯性能试验，研究了柔性混凝土的抗拉和抗弯破坏特性试验表明，柔性混凝土与普通混凝土相比，拉压强度比、极限拉应变明显增大；围压对抗拉强度影响较小，对极限拉应变影响较大；潮湿试样弯折破坏时的最大拉应变、抗折强度和最大挠跨比都较干燥试样的大，且随龄期增加明显增长 Flexible concrete is a new type of flexible material used in the anti-seepage wall of the second-stage cofferdam of the Three Gorges Project. Due to the difference between the head of the cofferdam and the downstream head, the flexible concrete is bent and deformed, and the cracking and failure are easy to occur. By the ultimate tensile strength Tensile tests and flexural tests under confining pressure were carried out to study the tensile and flexural failure characteristics of flexible concrete. The tests show that the tensile strength ratio and the ultimate tensile strain of flexible concrete are obviously higher than that of ordinary concrete The confining pressure has less influence on the tensile strength and greater impact on the ultimate tensile strain; the maximum tensile strain, the flexural strength and the maximum flex-span ratio of the wet specimen are larger than those of the dry specimen under bending failure Increase significantly increased period