The paper analyze the plan of engineering design by the method of value project . thus , obtaining the best plan , the engineering design will more value , rationalize and practice 摘要利用价值工程的方法来对工程设计方案进行功能分析，价值评价，从而得到最优的设计方案，使工程设计方案更加经济合理，更加符合实际，并在此希望能够得出一种设计方案评价的可行性模式。
This study will include a basic engineering design for the construction of a new btx recovery unit that will allow petron to recover benzene and toluene , as well as increase its mixed - xylene production and recovery capabilities 这项可行性研究将为开发一个石化制品回收和提取设施提供基础工程设计方案。这个设施可去除该公司汽油生产过程中产生的有难闻气味的苯、甲苯和二甲苯（
Twenty - four sets of tests have been carried out considering the problems in the two design plans , and the optimum regulation plan is then presented , involving excavation and widening of pailu and zhongcao , excavation bailangjiao and longzhu beaches , and smoothing of the shoreline 通过模型试验，针对两个整治工程设计方案反映出的问题，又进行了24组整治方案的试验，并提出了整治工程的优选方案，即挖宽排路、中槽，开挖白浪角、龙珠等浅滩，并平顺岸线。
But some difficult problems occurred , in construction due to shortage of system experiment on anti freeze of main canal lining project , it is very essential to carry out related experiment research for providing instruction of engineering practice and theory surppot of anti freeze of main canal lining project 但由于缺乏对干渠衬砌工程防冻胀的系统研究，在工程建设中出现了一些难点。为了指导工程实践，为灌区干渠防冻胀提供理论支撑，为进一步优化工程设计方案提供帮助，结合工程建设，进行防冻胀试验研究。
Spur dike shore protection project is designed for protection of the roadbed damaged by flood on qingxi reach of dongjiang river , the effect of which is calculated and analyzed by 2 - d mathematical model , to confirm the stream - deflecting and shore - protecting effect , and determine whether the spur dike exerts any influence on navigation 摘要对东江清溪河段水毁路基河段的保护进行了丁坝护岸工程设计，并采用二维数学模型对其效果进行了计算和分析，以确定工程设计方案的挑流和护岸效果，以及是否对通航造成影响。
( 4 ) according to the new methods of dynamic numerical simulation analysis and resting on the engineering geological conditions of surrounding rock mass and the project design , the three numerical simulation results are obtained , from which the author analyze systematically the distribution features of stress field , strain field and plastic zone in the surrounding rock mass of the underground cavities after the excavation and also the variable features of stress field , strain field and plastic failure zones in the surrounding rock mass of the underground cavities in the course of excavation ( 4 )按照动态数值仿真新思路，以地下洞室群围岩的工程地质条件和工程设计方案为依据，系统研究了大跨度、高边墙地下洞室群开挖完成后围岩的二次应力场、变形场和塑性破坏区的分布特征，开挖过程中围岩的应力场、变形场和塑性破坏区的变化特征。
