Based on project improved JC Method is applied to calculate unitary reliability, the pertinence with the invalid mode being considered farther, the limit of reliability is calculated.

• 结合工程实际，用改进的JC法时一重力式挡土墙单项可靠度进行了计算，并进一步考虑失效模式的相关性，求出了重力式挡土墙可靠度的界限。