摘 要：混凝土浇筑宜连续不间断进行，以避免出现削弱结构受力性能及变形特征的施工缝。传统的施工缝位置一般留于“剪力较小且便于施工”之部位，此法存在一些缺陷和不足。针对这种情况，提出了“受力较小且便于施工”的施工缝位置留置原则。 Abstract: Pouring concrete should be carried out without intermittence, so as to prevent the construction joints which may weaken the structure bearing performances and have deformation characteristic. The traditional construction joints are usually marked on the position with “smaller shearing and convenient for construction”, however, this method has a few defects and shortcoming. Aiming at this situation, the setting principle of the construction joints position with “smaller loading and convenient for construction” is proposed

摘 要：以广州轨道交通沿线一座地下两层一岛一侧站台车站的地下连续墙施工为例，介绍了燕尾型接头地下连续墙施工的技术要点，并针对施工过程中容易出现的问题提出相应的措施 Abstract：The underground diaphragm wall (UDW) with swallowtail joint has been successfully used in a subway station in Guangzhou. Key points of the construction for this project have been discussed and relevant measures have been proposed to solve the problems in the construction process.

摘 要：通过正交试验分析了泡沫玻璃、水泥、水和外加剂掺量对泡沫玻璃自保温砌块的导热系数、抗压强度和表观密度的影响，验证了泡沫玻璃等材料配置泡沫玻璃自保温砌块的可行性。 Abstract: Based on the orthogonal experiment, the effects of the foam glass, cement, water and additive on thermal conductivity, compressive strength and apparent density of insulating blocks with foam glass have been analyzed, and the feasibility of foam glass to prepare insulating blocks with foam glass has been verified.

摘 要：将废陶瓷破碎成细骨料，部分取代特细砂配成废陶瓷再生混合砂。固定稠度和胶砂比，通过试验，对比了陶瓷再生混合砂砂浆、天然中砂砂浆、特细砂砂浆和陶瓷再生粗砂砂浆的抗压强度、抗折强度和干缩性能的差异。结果表明，陶瓷再生混合砂砂浆能够达到工程应用的强度要求且后期强度较高；其相对脆性低、干缩小，有利于提高抗裂性。 Abstract : Waste ceramic is crushed as recycled ceramic coarse sand, and recycled ceramic mixed sand is made through recycled ceramic coarse sand partly replacing super-fine sand. By fixed consistence and cement-aggregate ratio, the compressive strength, flexural strength and shrinkage performance between mortar respectively made from natural medium sand, super-fine sand, recycled ceramic coarse sand and recycled ceramic mixed sand are contrasted. The results show that the mortar using recycled ceramic mixed sand as fine aggregate can achieve the project’s strength request and it has higher strength at later age. And by adding recycled ceramic coarse sand in mortar, the brittleness and shrinkage of mortar can be decreased, thus, the crack resistance of the concrete can be improved.

摘 要：混凝土早期变形及约束引起的地下室侧墙混凝土开裂现象是工程中的常见问题。通过预埋温度与应变传感器的方法，对实际工程中侧墙混凝土早龄期的温度与应变的变化规律进行了监测。研究结果表明，地下室侧墙混凝土浇筑后，温度的变化都有一潜伏期，此后温度急剧上升直至达到最大温升，之后开始降温并趋于外界温度。同时研究也表明，混凝土内部温度是影响应变发生的主要原因，且混凝土内部早期应变明显，当温度趋于外界温度后，侧墙混凝土的应变并不发生太大变化。 Abstract: Early deformation and constraint of concrete causing the basement side wall concrete cracking phenomenon are common problems in engineering. Through the methods of embedded temperature and strain sensor, the temperature with side wall concrete early ages and strain change rules in actual engineering are monitored. The results indicate that after the basement side wall concrete casting, the change of the temperature has an incubation period, then the temperature sharply rises until reaching the maximum, after that, the temperature begins to be cooling and tends to be the outside temperature. Meanwhile, the research also shows that the internal temperature of concrete is the main reason for strain happening, and the early strain of concrete is obvious. When the temperature of side wall concrete tends to be outside temperature, the strain doesn’t occur too much change.

摘 要：论述了寒冷地区节能现状和居住建筑外墙节能指标，通过对自保温砌块组成材料计算分析，提出自保温砌块墙的选材方法。结果表明，以承重兼保温的陶粒混凝土空心砌块内填泡沫混凝土制成的自保温砌块用于寒冷地区居住建筑外墙，完全能实现建筑节能65%的目标。 Abstract: The energy-saving status and the design standard of outer walls for dwelling houses which can save energy by 65% in cold regions are introduced. Through the calculation and analyses of composite material of self-thermal insulation blocks, a selecting material solution on self-thermal insulation blocks is put forward. The results show that the self-thermal insulation blocks made by ceramsite concrete hollow blocks encased in foam concrete can be used for outer walls of dwelling houses and can save energy by 65%.