针对灌注桩桩身质量检测时单一的检测方法可能无法全面反映桩身缺陷,容易发生漏判、误判的现象,提出了将超声波法、低应变法、钻孔取芯法等综合应用于桩身完整性检测中,并结合实例作了详细论述,以期对桩身混凝土质量做出正确的评价.

通过介绍损伤力学的原理,进一步分析研究了由水泥与混凝土铺设路面的开裂机理和破坏过程,并结合理论与实践提出了预防路面开裂的措施,以延长水泥混凝土路面的使用寿命.

本文通过计算超声波遇到球状缺陷时三种假定传播路径的理论声时,对比实测声时表明实际路径为沿圆切线传播。改变球状缺陷体积分析超声波信号的变化规律,从拟合曲线可以看出,缺陷体积较小时,虽然实测声时变化不大,但对应缺陷直径变化较大,因此估算缺陷体积时,会因较小的测试误差而产生较大的计算误差。

Taking the Scientific and Technical Museum of Shanxi as the example,the paper illustrates the construction methods and the quality inspection of the aerated concrete blocking technique for pre-mixing mortar thin-layer masonry,and proves by the effect analysis and practice that the technique can eliminate some common diseases for the autoclaved aerated concrete block filled walls.

The paper explores mass concrete cap construction with optimal concrete mixing proportion design,cooling tube cooling and doublemixture technology and so on under high temperature conditions in the north of China,successfully accomplishes construction tasks,and accumulates site construction experience under complicated climate conditions.

In order to ensure the construction progress,this paper undertook winter construction of concrete engineering,discussed one by one the raw materials,concrete mixing,transportation,pouring,curing and demoulding,so as to guide the each link details control in winter construction,reduce diseases.

In view of the construction practice of reinforced gabion retaining wall of Wen-Yuan highway, this paper discussed the construction technology and matters needing attention of reinforced gabion retaining wall from the construction preparation of reinforced gabion retaining wall, construction technology and quality control key points and other aspects, had accumulated valuable experience for future similar project construction.

Combining with the factual engineering examples,the paper introduces the technical features for the double-faced self-adhered waterproof coil of mixed pavement method,illustrates the construction procedure,the operation points and precautions of the double-faced self-adhered waterproof coil of the mixed pavement method,and analyzes the economic benefits and the comprehensive prospect of the technique,so as to enhance its application.

The paper explores the cost control in the architectural programs,analyzes the important role of the architectural cost control,indicates the contents and principles of the cost control of the architectural programs,and points out some measures for the cost control of the architectural programs,so as to direct the practice.

Based on Tai-Jia highway engineering construction practice,the paper introduces the synchronous crushed stone construction material and machinery preparation,construction preparation,technological procedures and technological control points of modified asphalt.Practice proves that the technology is worth promoting.

This paper briefly introduced the concept and significance of engineering risk management,and respectively elaborated the main contents,analysis methods and processing countermeasures of engineering risk management,pointed out the architectural engineering construction risk had lots of influence factors,we should take the necessary risk management and control means at the same time to establish risk consciousness,in order to ensure the economic efficiency of enterprises.

Combining the working experience,this paper discussed the definition of concrete construction joint,reserve position and setting form,and emphatically probed into quality control methods and measures of the concrete construction joints,to avoid the quality defects of concrete construction joints to ensure durability.

This article discusses the application of self-balancing method in foundation pile loading test,introduces basic principles and working method of self-balancing method,describes the conversion between data processing and equivalent curve,and points outs its wide application prospect by combining with engineering practice.

In light of crack hazard on concrete structure,starting from three aspects of raw material,construction craft,and maintenance methods,it analyzes the crack causes at construction phase,and puts forward crack control measures and processing methods at construction phase,with a view to guide practice.

By adopting the comprehensive geophysical methods, such as the sound wave and the elasticity moduli test, the paper undertakes the comparative tests on the flood discharging draining sand tunnel of Zipingpu hydro-junction before and after the consolidation grouting, and analyzes the test results by adopting the hypothesis testing, so as to achieve the reasonable evaluation for the significance of the grouting effect.

This paper briefly analyzed the factor of influence the ultrasonic time variety in course of the ultrasonic detection,and introduced how to adopt least squares technique to fit a straight line for supersonic velocity correction when the distances of the pipes are linear change,thereby we can make out correct evaluation for the concrete quality of the pile.

This paper is to analyze objectively the key points and links of construction project bid invitation and bidding in the market,point out the problems with in the existing process,process the issues worth paying attention to,and disclose the importance of bid invitation and bidding in construction projects,so as to promote the sound and orderly development of construction project bid invitation and bidding as well as the market management of tangible architectures.

How to guarantee that crash barrier's geometry size and along straight is the goal which artisticly in the construction process pursues,because the crash barrier shape characteristic had decided the construction technique is not easy to grasp with the concretes guard rail outward appearance existence flaw,are especially many by the air bubble,the semblance line along straight most difficult not to solve,is not easy to overcome.Regarding this,introduced on the reinforced concrete crash barrier's construction craft and the appearance quality control aspect.

In order to judge Baxian Bridge safety from strength,rigid stability and durability etc,and have actual and integral understanding on quality disease,therefore proposing corresponding technical countermeasures to quality defects,so the bridge technical situation was evaluated by field quality detection and dead load test so as to make sure the bridge safe running and normal use.

This article according to the bridge construction many year experiences,unifies circles in the city adjustment highway construction in Yinchuan the concrete procedure,introduced in detail the thin wall wall's job practice and the craft,the quality assurance measure,as well as prevents the thin wall wall to present the measure which the crack adopts.