The cause of underwater concrete reinforcing cage up - floating accident is improper operation , such as loose - placement of reinforcing cage , fast - drawing of conduct pipe , improper embedded depth of conduct pipe ; and the poor quality of concrete , for example , the slump , sand percentage , adhesiveness and initial setting time don " t meet requirement 水下混凝土浇注钢筋笼上浮事故的原因是操作不当，如钢筋笼固定不牢、提升导管过猛、导管埋深不当等，以及混凝土品质差，如坍落度、含砂率、粘聚性、初凝时间等不合要求。
China futures market ' s foundation is not jail , stability bad , transaction variety few , and certain exchange supervising and managing not to be lax , forward price undulation unusual , the market is unable the assurance , the transaction dispute and even the lawsuit is unceasing , enormously has disturbed the market order 中国期货市场根基不牢、稳定性差，交易品种少，加之某些交易所监管不严，期货价格波动异常，市场无法把握，交易纠纷乃至诉讼不断，极大地干扰了市场秩序。
