摘 要：通过实际工程，介绍了在5m连砂石回填层，即土质疏松、地下水较为丰富、地质条件不稳定的地基中开挖大直径人工挖孔桩的施工方法及施工注意事项。运用在已开挖桩孔段土壁内沿着四周打入斜向钢筋，并将钢筋浇注于桩护壁混凝土中等方法，可有效保证回填层中桩孔的开挖施工安全。 Abstract：Through the practical engineering, construction methods and attentions of large diameter artificial digging piles in 5m sandstone backfill layers, which is the foundation with the loose soil, rich groundwater and unstable geology characteristic are introduced. The oblique reinforcement is digged around into the wall of digged piles, and the methods that pile wall concrete is poured by reinforcement can efficiently ensure the excavation construction safety for pile holes in backfill layers.

摘 要：以河南平顶山某大厦基础工程大体积混凝土浇筑实际工程为例，介绍了UEA微膨胀剂、JKR复合减水剂及粉煤灰三掺技术在该工程中的应用情况。从原材料、配合比设计、施工管理、质检等方面进行全过程控制，取得了良好的技术及经济效益。 Abstract: As the practical engineering of mass concrete grouting for a building basis project of Pingding mountain in Henan for an example, the tri-mixture technology of UEA micro-expansion agent, JKR composite water reducer and fly ash are introduced for the application on this engineering. Through the total process controlling from material, mix proportion design, construction management and quality testing, good technology and economic profit are acquired.

摘 要: 介绍了聚氨酯弹性混凝土在连霍高速公路三门峡段K851+900（南幅）及K791+900（南幅）的全厚度及半厚度修补工作中的应用情况，提出了施工过程中应注意的问题。聚氨酯弹性混凝土具有良好的弹性变形能力，通过自身的弹性变形，可以较好地耗散车轮的动态冲击作用，具有优越的抗冲击能力。将聚氨酯弹性混凝土应用于桥面伸缩缝的病害维修中，既能够减少交通中断时间，又能降低维修成本。 Abstract: The applications of polyurethane elastic concrete for through-thickness repairing and half-thickness repairing in Lianhuo expressway Sanmenxia K851+900 (southern sheet) and K791+900 (southern sheet) are introduced, and problems which should pay attention during the construction process are proposed. The polyurethane elastic concrete has good elastic deformation capacity, through the self-elastic deformation, the dynamic impact role of wheels can be better dissipated by the polyurethane elastic concrete, and it also has super impact resistance capacity. The application of polyurethane elastic concrete in repairing disease of expansion joint for bridge can not only reduce traffic disruption time, but also decrease maintenance cost.

摘 要：以某地下室混凝土长墙浇筑温控施工为例，阐述了混凝土墙体在施工前应确定温控指标以及制定温控施工的综合技术措施。通过对混凝土墙体温控指标计算分析，提出了混凝土超长墙体合理留置后浇带间距、带模保温养护的“放”、“防”结合的抗裂对策，是保证混凝土长墙施工质量的关键。 Abstract: Based on the example of the construction of long concrete wall pouring and temperature controlling of a basement, the works on fixing the indexes of temperature controlling and establishing complex technique measures of temperature controlling construction before the construction of concrete wall are described. Through the computational analysis on the indexes of temperature controlling of concrete wall, the countermeasures of crack-resisting “to release” and “to resist” are put forward.“To release” means reasonably reserving space for post-pouring belts in over-long concrete wall, and “To resist” means that concrete wall is curing insulation with mold. The countermeasures are the keys to guarantee the construction quality of long concrete wall.

摘 要：对钢筋混凝土框架结构的强柱弱梁设计原则进行了分析，结合工程实际震害，得出梁端超配筋现象是影响强柱弱梁的一个重要因素，归纳了造成梁端超配筋的原因，并结合工程实例具体说明梁端超配筋的形成过程，就设计过程中如何实现强柱弱梁提出了建议。 Abstract: The design principles of strong column and weak beam of reinforced concrete frame structure are analyzed. According to a project damage, it’s found that the super reinforcement phenomenon is an important factor effecting strong column and weak beam, and the reasons causing super reinforcement are summed up. Combined with the engineering practice, the details of forming process of the girder super reinforcement are introduced, and how to realize the strong column and weak beam in the design process is proposed.

摘 要：陶粒砂轻混凝土是一种比较理想的建筑材料，具有轻质、保温、吸声、隔热等优点，已广泛应用于各种工业与民用建筑。本文利用陶粒作为骨料，陶砂部分替代天然砂及其它常规材料，配制出陶粒砂轻混凝土，并对配制的混凝土的物理力学性能进行了测试。结果表明，该混凝土干密度较普通混凝土低，物理力学性能优越，能够满足工程需要。 Abstract: Ceramisite concrete is a sort of ideal building material with the advantages of light weight, thermal insulation, sound absorption and heat insulation, which is widely used in industrial and civilian constructions. In this paper, using ceramisite as aggregate and ceramic sand instead of nature river sand and other common-used materials to produce ceramic sand light-weight concrete is studied. And the physical and mechanical performances of this kind of concrete are tested. The results show that the dry density of ceramic sand light-weight concrete is lower than general concrete, and the physical and mechanical performances of this kind of concrete are superior, which can meet the demands of practical engineering.