摘 要：针对先张法预应力混凝土管桩产品存在的主要质量问题，为提高其产品质量，根据FMEA质量控制技术（故障模式及影响分析）的基本应用原理，论述了其在先张法预应力混凝土管桩产品生产过程中应用的步骤和方法，列举了在产品设计和生产过程中质量控制的具体案例。 Abstract: According to the main quality problems of pre-tensioned prestressed concrete pile products, to improve the quality of products, and based on the basic application principles of quality control techniques of FMEA (Failure Mode Effects Analysis)，the steps and methods of FEMA applied in the producing process of pre-tensioned prestressed concrete pile products are discussed，and the specific cases for quality control in the product design and producing process are listed.

摘 要：通过高速公路片石混凝土挡土墙的施工，提出了施工工艺要点，同时分析了挡土墙表面缺陷的成因，对缺陷的防治措施进行了探讨。 Abstract: Through the construction of rubble concrete retaining wall of expressway, the key points of construction technology are proposed, meanwhile, the reasons for surface defects of retaining wall are analyzed, and the discussion for defect prevention is carried out

摘 要：淮北某煤矿地压灾害极为严重，围岩顶、底多为砂岩、粉砂岩、泥岩，导致巷道底臌量大，现有支护无法得到满意的支护效果。通过对导致底臌因素的分析并结合目前矿井巷道现状，采用了全封闭棚架和注浆联合支护技术，有效地控制了围岩变形，使巷道一次支护成功。 Abstract: The situation of ground pressure hazard of a coal mine in Huaibei is extremely serious, because the top and bottom of surrounding rock are mostly sandstone, siltstone and mudstone, which leads to large amount of floor heave of roadway, and the supporting effects of existing support cannot be satisfactory. Based on the analysis of the factors leading to floor heave and combining with the current situation of mine roadway, a full-sealed scaffolding and grouting combination supporting technology is used, which can effectively control the surrounding rock deformation, and make the primary support of roadway be successful.

摘 要：结合中材国际甘肃白银4500t/d水泥生产线实际工程，介绍了冬季寒冷环境下水泥生产线生料库环形基础混凝土的配合比设计、设备选取及施工过程。 Abstract：Combining with Sinoma practical engineering of 4500t/d cement production lines in Baiyin, Gansu Province, the mix design, selections of equipment and construction process of ring foundation of mass concrete are introduced which is raw material silo of cement production lines under cold environment in winter

摘 要：现浇板负弯矩钢筋保护层偏差直接影响到钢筋混凝土板的力学性能及耐久性，关系到建筑物的使用安全及使用寿命，现行混凝土结构验收规范要求在验收时必须提供保护层厚度实体检测结果，因此，在设计和施工中应采取有效措施保证保护层厚度的准确性，以确保构件的正常使用，提高工程质量。 Abstract: Negative bending moment reinforced protection layer deviations of in-situ slab can directly affect the mechanical properties and durability of reinforced concrete slabs, which is relative to the using safety of a building and its service life. The existing concrete structure acceptance specification requires that the entity test results of protection layer thickness must be supplied when doing acceptance, therefore, during the design and construction, effective measures to guarantee the accuracy of protection layer thickness should be taken, which can ensure the normal use of components and improve the engineering quality.

摘 要: 利用聚合物水泥包覆膨胀珍珠岩制成改性珠粒,并将改性珠粒掺加到水泥砂浆中制成保温砌块。测试了改性珠粒的吸水率、筒压强度及导热系数，并据此确定了聚灰比；研究了改性珠粒不同掺加比例的保温砌块的密度、导热系数、吸水率以及强度的变化，并对掺加比例与导热系数进行了线性回归分析。 Abstract: Expanded perlite cladded by polymer modified cement-based composite materials is made into modified beads, and thermal insulation blocks are made out through adding modified beads to cement mortar. The water absorption, thermal conductivity and compressive strength of modified beads are tested, and polymer cement ratio is determined. The density, thermal conductivity, water absorption and changes in intensity of the thermal insulation blocks with different proportions of modified beads are studied, and the linear regression analysis between mixing ratio and thermal conductivity is carried out.