苏州混凝土水泥制品研究院有限公司

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发布时间:2020-01-06 00:00:00
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水泥混凝土制品

新型预制混凝土排水沟的研发与应用
新型预制混凝土排水沟的研发与应用
  • 李长俊1,何文斌2,章彬虎3,郑国平2,庄一舟2
2022年第4期
摘要
引用本文
摘  要:为提高公路山岭隧道的预制化水平,提升工程质量和缩短施工工期,基于实际工程,研发了一种新型预制混凝土排水沟,介绍了其结构形式、沉砂井、排水孔等细部构造,并阐述了其生产工艺、施工技术、现场拼装等技术要点。实际工程应用表明,该预制构件应用效果良好。 Abstract:In order to improve the prefabrication level of road mountain tunnel structure, promote the project quality and shorten the construction period, a new precast concrete drainage is developed. The structural style, sand sediment trapand and drainage hole are introduced, and the key points of production process, construction technology and on-site assembly technology of the precast concrete drainage are described. In addition, practical engineering shows that its application effect is good.
李长俊,何文斌,章彬虎,等.新型预制混凝土排水沟的研发与应用[J].混凝土与水泥制品,2022(4):33-35. LI C J,HE W B,ZHANG B H,et al.Development and Application of New Precast Concrete Drainage[J].China Concrete and Cement Products,2022(4):33-35.
加速锈蚀后预应力混凝土方桩连接接头抗拉性能研究
加速锈蚀后预应力混凝土方桩连接接头抗拉性能研究
  • 樊 华1,徐铨彪2,3,陈 刚2,3,陈虹霖4,龚顺风4
2022年第4期
摘要
引用本文
摘   要:为研究氯盐环境下预应力混凝土方桩连接接头的耐久性能,对弹卡式与焊接式连接方桩接头试件进行了通电加速锈蚀试验,并对劣化后两种接头试件和预应力钢棒分别进行了抗拉性能试验。结果表明:劣化后弹卡式连接接头试件整体连接性能较好,破坏形式为桩身裂缝开展充分,接头连接完好,下节桩预应力钢棒被拉断;焊接式连接接头试件在焊缝处锈蚀相对严重,轴向开裂拉力下降幅度较大,破坏形式为接头焊缝处被拉开,两侧端板完全脱离,桩身未出现裂缝;两种接头形式劣化后预应力钢棒材料力学性能下降均在10%以内。 Abstract: To study the durability of connection joints of prestressed concrete square pile in chlorine salt environments, the electrical accelerated corrosion tests were conducted on the connection joint specimens of prestressed concrete square piles using elastic clip connection and welded connection, and then the tensile behavior tests of two types of square pile connection joint specimens and the prestressing steel rods were also conducted, respectively. The results show that the deteriorated square pile joint specimens with elastic clip connection have good overall connection performance and more durability. The failure mode is that the cracks in the pile body are fully developed, the joint connection is intact, and the prestressed steel rods of the lower pile are pulled off. However, the weld seam at the connection joints for the welded connection square pile specimens are corroded seriously, and the axial cracking tensile force declines greatly. The failure mode is that there is no crack in the pile body, the weld seam at the joint connection is pulled apart and the end plates on both sides are completely detached. The mechanical properties of the prestressed steel rods decreases within 10%.
樊华,徐铨彪,陈刚,等.加速锈蚀后预应力混凝土方桩连接接头抗拉性能研究[J].混凝土与水泥制品,2022(4):36-41. FAN H,XU Q B,CHEN G,et al.Study on Tensile Performance of Connection Joints of Prestressed Concrete Square Pile After Accelerated Corrosion[J].China Concrete and Cement Products,2022(4):36-41.
荷载作用下钢管再生混凝土柱的受力分析及数值模拟研究
荷载作用下钢管再生混凝土柱的受力分析及数值模拟研究
  • 康希良,高 磊,陆松亭
2022年第4期
摘要
引用本文
摘   要:针对钢管再生混凝土柱在实际工程中出现的顶部脱空现象,基于弹性力学圆筒受均布压力的拉梅解答,分析了钢管、核心再生混凝土分别承受的荷载大小和由于变形不协调造成的轴力传递长度,并基于已有的钢管再生混凝土试验研究,得到了两者的理论分析值。此外,运用ANSYS有限元分析软件模拟了不同条件下钢管和再生混凝土的应力分布情况,并将模拟得到的压力分配情况和轴力传递长度与理论值进行了对比,结果表明吻合程度较好。 Abstract: For the top void phenomenon of recycled concrete filled steel tubular column in the practical application, based on the Lame solution of elastic mechanics cylinder under uniform pressure, the load borne by steel tube and core recycled concrete respectively, and the length of axial transfer were analyzed. Based on the existing test of recycled concrete filled steel tubular, the theoretical solution was obtained. In addition, ANSYS finite element analysis software was used to simulate the load under different conditions. The pressure distribution and axial transfer length were compared with the theoretical analysis value. The simulation results were in good agreement with the theoretical results analysis. 
康希良,高 磊,陆松亭.荷载作用下钢管再生混凝土柱的受力分析及数值模拟研究[J].混凝土与水泥制品,2022(4):42-45,54. KANG X L,GAO L,LU S T.Mechanical Analysis and Numerical Simulation of Recycled Concrete Filled Steel Tubular Columns Under Load[J].China Concrete and Cement Products,2022(4): 42-45,54.
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