The utility model discloses a reinforced concrete casing pile, which belongs to the field of civil engineering, in order to solve the problem that the existing casing pile can not be applied in large and medium diameter pile foundation engineering and has high cost. The inner pile consists of outer casing and inner pile; the inner pile is enclosed by the longitudinal reinforcement of the pile and the inner concrete of the pile stirrup. The diameter of the lower pile is large, the upper diameter of the inner pile is small, the lower pile and the upper pile are connected by the lower large and upper variable diameter section, the upper pile is provided with outer casing, and the outer casing and the pile hole are provided with a loose material layer. The utility model can greatly reduce the adverse effect of negative friction on pile foundation, is easy to operate, improves the bearing capacity of pile foundation, reduces settlement and prolongs durability. The utility model has the advantages of convenient construction, environmental protection and no pollution.
【技术实现步骤摘要】
钢筋混凝土套管桩
本技术属于土木建设工程领域,具体涉及一种大、中等直径是钢筋混凝土灌注桩。
技术介绍
桩基础的作用是将荷载传至地下较深处承载性能好的土层,以满足承载力和沉降的要求。桩基础的承载能力高,能承受竖直荷载,也能承受水平荷载,能抵抗上拔荷载也能承受振动荷载,是应用最广泛的深基础形式。桩基础由于适用范围广、承载能力高、沉降量小,被广泛应用于建筑、桥梁、港口等工程中。桩基础按承载性状分类,可分为摩擦型桩、端承型桩。摩擦型桩可分为摩擦桩、端承摩擦桩,摩擦桩在承载能力极限状态下,桩顶竖向荷载由桩侧阻力承受,桩端阻力小到可忽略不计;端承摩擦桩在承载能力极限状态下,桩顶竖向荷载主要由桩侧阻力承受。端承型桩分为端承桩、摩擦端承桩,端承桩在承载能力极限状态下,桩顶竖向荷载由桩端阻力承受,桩侧阻力小到可忽略不计;摩擦端承桩在承载能力极限状态下,桩顶竖向荷载主要由桩端阻力承受。摩擦桩、端承摩擦桩、摩擦端承桩桩顶竖向荷载全部、主要或部分桩侧阻力承受。但我国地域广阔,工程地质情况复杂,湿陷性黄土、填土、冻土、盐渍土等特殊土广泛分布。在这些特殊土地基中桩顶竖向荷载不但不能由桩侧阻力 ...
【技术保护点】
1.一种钢筋混凝土套管桩,包括外套管、内桩;其特征在于:所述内桩由桩纵筋(1)、桩箍筋(2)内装混凝土(3)围合而成,内桩的下部桩(8)直径大,内桩的上部桩(9)径小,下部桩(8)与上部桩(9)之间由下大上小的变径段衔接,上部桩(9)外设置外套管(4),外套管(4)与桩孔(7)之间设有散体材料层(5)。
【技术特征摘要】
1.一种钢筋混凝土套管桩,包括外套管、内桩;其特征在于:所述内桩由桩纵筋(1)、桩箍筋(2)内装混凝土(3)围合而成,内桩的下部桩(8)直径大,内桩的上部桩(9)径小,下部桩(8)与上部桩(9)之间由下大上小的变径段衔接,上部桩(9)外设置外套管(4),外套管(4)与桩孔(7)之间设有散体材料层(5)。2.根据权利要求1所述的钢筋混凝土套管桩,其...
【专利技术属性】
技术研发人员:柴清,陈天镭,张杰,王兆辉,
申请(专利权)人:兰州有色冶金设计研究院有限公司,
类型:新型
国别省市:甘肃,62
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