· Firstly, both the contracting and contracting parties have engaged in behaviors that violate the bidding procedures. Some contracting parties engage in fraudulent practices during the bidding process for construction projects, using invitation based bidding methods to exclude potential bidders for construction projects that should be publicly tendered; In order to cope with the dominance and pressure of the contracting party, some construction companies adopt unfair competition methods and engage in bid rigging and collusion activities in engineering bidding.

· The contracting party often requires the contractor to accept harsh contract terms while signing the contract. Construction engineering experts believe that China's construction engineering market belongs to a typical seller's market,This is not only related to the characteristics of the construction industry, but also a product of market competition. To solve this problem, it is necessary to improve the risk prevention ability of construction engineering enterprises through laws and enhance their ability to resist risks.

· It refers to the control of various preparatory work and factors affecting quality before the formal construction activities of each project object begin, which is a prerequisite for ensuring construction quality.

· Refers to the control of the quality of actual production factors and the implementation status and results of operational technical activities during the construction process, including the self-control behavior of operators in the process of exerting technical capabilities and the monitoring behavior from relevant managers.

· It refers to the quality control of the final product (unit project or entire engineering project) and related aspects (such as quality documents) that have independent functions and use value completed through the construction process.

· Usually, any large or medium-sized construction project can be divided into several levels. For example, construction projects can be divided into unit projects, sub projects, sub projects, inspection batches, and other levels according to national standards; For engineering projects such as water conservancy and hydropower, port transportation, etc., they can be divided into several levels: individual projects, unit projects, sub projects, and sub projects. The relationship between each component has a certain logical sequence of construction order. Obviously, quality control during the construction process is the most fundamental quality control, which determines the quality of the relevant inspection batches; And the quality of the inspection batch determines the quality of the sub projects; The quality of sub projects determines the quality of sub projects; The quality of sub projects determines the quality of unit projects; The quality of a unit project determines the overall quality of the project.

·There are three main issues with construction technology in building engineering:

·Many construction workers have the problem of substandard construction techniques in the waterproofing construction of roofs, which affects the smooth progress of construction. Secondly, in the waterproofing work of the roof, there are also some workers who are not serious about their work and cut corners, resulting in water leakage in the house during use by the owners

· In addition to the above-mentioned issues, there are also related problems regarding the quality of concrete and maintenance techniques in construction projects. On the one hand, there are quality issues with concrete, such as the occurrence of small amounts of honeycomb and rough surfaces. In addition, there are also issues with concrete curing, such as insufficient curing time and watering. These issues will seriously affect the quality of construction projects, which is not conducive to the future use of the entire building, and there will be certain hidden dangers in terms of quality and safety.