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conomy, an important part of the legal system, elaborated quality supervision three levels of management, emphasizing the supervisory bodies throughout the project quality assurance system in a very important position. January 2005, the Ministry of Construction engineering quality supervision and development of the industry, Comrade Xu Bo, deputy director in the "study and implement the spirit of the Central Economic Work Conference to strengthen the quality and safety supervision to promote the healthy development of the construction industry," the meeting pointed out: to highlight the reform and innovation, and effectively improve regulatory system in government work, methods. An industry dominated by a management shift to construction supervision mainly dominated by the prior approval of the steering process supervision and administrative law enforcement based.
Judging from the construction areas, there are still some obstacles raise the level of engineering quality problems. First, quality consciousness is not in place in some regions engineering construction units can not correctly handle speed up the construction and ensure that the relationship between the quality of the project, one-sided pursuit of economic indicators and construction speed, sense of responsibility is not in place, resulting in the quality of work is not implemented. Second, the responsibility for the quality may not be implemented. Some construction units do not fulfill the statutory responsibilities of quality management, and some construction general contractor quality management loopholes related subcontracting enterprises and personnel responsibilities are not implemented, some projects ineffective supervision unit, simply can not play the role of project quality control. Third, the quality of supervision is not in place. Objectively, a substantial increase in the scale of capital construction, engineering, quality control serious shortage of power, most of the areas, especially cities per capita supervision area from the early 1990s to the current 30,000 square meters, 50 -100 million square meter, while the cancellation of engineering quality supervision fees in some areas also carry out supervision work is affected. On the other hand some regulatory personnel to perform their duties lax enforcement of illegal behavior tolerated, so that greatly reduced the quality of supervision and deterrence, achieve its proper role. Fourth, the market conduct not in place. Excessive competition in the construction market, credit evaluation system is not perfect circumstances, the construction unit to engage in false bidding, casual drive down construction costs, contracting reasonable period; survey, design, construction units subcontracting, illegal subcontracting, anchored widespread; supervision, testing other units vicious competition, and even set the expense of laws and regulations, simply pandering to unreasonable demands of the commissioning party.
Construction risk from the point of view, with the construction of the expansion, construction method increasingly complex, the surrounding environment impact on the construction site is also growing. Rail transit project as an example of modern urban underground metro line design is usually chosen through residential or commercial areas, subway lines can not avoid dense cluster of buildings in order to reduce the impact on daily traffic, subway construction and often choose shield tunneling