Mass Concrete Structure Seamless Construction Measures Applied Research

In recent years, along with the social economy fast, stable and sustainable development, bedding face accumulates, high-performance building demand also become increasingly exuberant, therefore, the construction of mass concrete construction middling become problems, and the construction of mass concrete inherent some problem also became project construction difficulty. Mass concrete construction technology difficulty overall requirement is relative taller, especially to prevent concrete for cement hydration heat led up the difference in produce temperature stress caused cracks. Therefore, to ensure the construction of mass concrete can meet the design requirements, need from material selection, technical measures such key links made adequate preparation work, can ensure the engineering quality.The temperature stress is always the concrete engineering of a big issue in mass concrete has received enough attention. Because the hydration of cement in the consolidation process will produce large amounts of the hydration heat, at the same time, because of the thermal conductivity of concrete is lower, for local bulky concrete girders are concerned, internal accumulation of heat can't send out as soon as possible, thus forming high inner temperature and external temperature low temperature gradient, thus resulting in the internal temperature of non-uniform deformation under structure restraint and external restrictions of itself, will generate a large temperature stress. Volume is larger, the quantity of heat more easily pass savings, temperature difference is bigger, produce the temperature stress increase. Many cases for processing or improper control, the stress will exceed concrete tensile strength and cause structure produce temperature crack, give structure use and safety brought hidden trouble. However, as topical size relatively large prestressed concrete girders, its temperature stress and the resulting cracking problems at home and abroad for its produce mechanism and reason of the study also relatively less, of the hydration heat temperature and stress stage the change rule of study still lacks sufficient data.This article from the mass concrete temperature effect, according to the study of mass concrete in the domestic and foreign research development present situation, the union complex construction conditions red island waterway bridge cable tower of SFRC four-pile caps concrete temperature control scheme development construction practical characteristics, discusses the construction of mass concrete of the general process of mass concrete crack control measures of the comprehensive and systematic research. Summarized in mass concrete problems in construction, using computer numerical simulation technology, and find out the construction process of cnooc work concrete temperature field, stress field with the change rule of ages, analyzing large volume, the formation mechanism of concrete cracks. This to ensure the concrete construction quality and construction safety and reduce structural cracks emerge, accelerate the progress of the projects, shorten the construction period, improve equipment turnover, improving economic efficiency, has great practical significance.