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公开(公告)号：US12011849B2
公开(公告)日：2024-06-18
申请号：US17605462
申请日：2020-04-22
CPC分类号： B28B23/043 , B28B23/026 , B28B23/06
摘要： In a method for producing a plurality of concrete cast elements of prestressed concrete, in particular for producing of railway sleepers, in a long bed which is a multiple of the length of a concrete cast element, in which separating elements are installed in the long bed to define the length of each of the concrete cast elements to be casted, a first and a second separating element for defining the length of a concrete cast element together with a tensioning device with tensioning elements for tensioning the concrete cast element between the two separating elements are mounted in the long bed, whereupon the concrete cast element is cast between the two separating elements and is at least partially hardened in the long bed.
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公开(公告)号：US10850427B2
公开(公告)日：2020-12-01
申请号：US15329872
申请日：2015-07-28
申请人： Synrocks SA
IPC分类号： B28B23/04 , E04C5/08 , B28B11/24 , E04C3/26 , E04C5/07 , B28B23/06 , F24S25/00 , B28B1/52 , E04C5/01 , F24S80/00 , F24S25/11 , F24S23/71
摘要： The method according to the invention for producing a prestressed concrete workpiece is characterized in that the prestress is created by a heat treatment, wherein the concrete and the reinforcement therefor are selected in such a way that, when cooling the concrete workpiece from an elevated temperature, the heat expansion coefficient of the concrete is less than that of the reinforcement, and in that, during cooling, the concrete and the reinforcement adhere sufficiently strongly to one another if, during cooling, the concrete is hydrated at least to such an extent in order to be able to expand the reinforcement on account of the different heat expansion coefficients, and in that the concrete, together with the reinforcement, is brought to the elevated temperature in such a way that and is hydrated during cooling at least to such an extent that it is prestressed by the reinforcement after cooling.
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公开(公告)号：US20170191268A1
公开(公告)日：2017-07-06
申请号：US14989398
申请日：2016-01-06
CPC分类号： E04C3/34 , B28B23/005 , B28B23/06 , E01F8/0023
摘要： A pre-stressed concrete body is disclosed. The concrete body is elongated with a first end and an opposite second end. A plurality of reinforcement strands within the concrete body extend from the first end to the second end and impart a compressive force. A baseplate is disposed on the first end, and has a plurality of first fastener receiving holes and a plurality of second fastener receiving holes.
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公开(公告)号：US06841110B2
公开(公告)日：2005-01-11
申请号：US10204354
申请日：2001-03-02
申请人： Aimo Seppänen , Heikki Kankkunen
发明人： Aimo Seppänen , Heikki Kankkunen
摘要： A method for the production of prestressed concrete products and a plant for implementing the method. Moulds provided with pretensioned wires are moved through fixed casting machines into a hardening space. In the hardening space, the combination of mould and product is lifted sideways from the casting line before hardening, using synchronised lifting equipment. The combination may be stacked for space economy. After hardening, the product is removed from the mould using the same lifting equipment. The moulds are returned to the beginning of the casting line, during which stage they are cleaned and refurbished. The products are transferred to cutting and finishing stations.
摘要翻译： 预应力混凝土制品的生产方法和实施该方法的工厂。 设有预拉丝的模具通过固定铸造机移动到硬化空间。 在硬化空间中，使用同步起重设备，在硬化之前，模具和产品的组合在铸造线上侧向提升。 为了空间经济，组合可以堆叠。 硬化后，使用相同的起重设备将产品从模具中取出。 模具返回到铸造线的开始处，在此阶段，它们被清洁和翻新。 产品转移到切割和精加工站。
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公开(公告)号：US6155810A
公开(公告)日：2000-12-05
申请号：US125172
申请日：1998-11-17
申请人： Stig Thim
发明人： Stig Thim
CPC分类号： B28B23/06
摘要： A mold bed for fabricating pre-stressed concrete elements has a mold frame (8) that extends between the ends of the bed. Tensioning heads are mounted at the bed ends for tensioning reinforcement ropes or lines (10) extending in the mold cavity. The mold frame (8) includes longitudinally extending beam elements (4) that take up pressure forces which constitute counter-pressure forces that are generated by the tension forces that are taken up by the tensioning heads when tensioning the ropes. These beam elements have the form of long bars (4), e.g., bars of rectangular profiles, that are surrounded by continuously or discontinuously extending sleeve elements (5). The bars (4) are therewith prevented from buckling or breaking sideways as a result of the pressure forces generated by the tension in the ropes (10). The sleeve elements (5) are stiffened by means of anchoring devices (14) that engage in the underlying surface. A layer or coating of nylon for instance is applied between the bars (4) and the sleeve elements so as to facilitate relative movement between the bars and the sleeve elements. Alternatively, wheels or rollers may be used to this end.
摘要翻译： PCT No.PCT / SE97 / 00243 Sec。 371日期：1998年11月17日 102（e）日期1998年11月17日PCT 1997年2月14日提交PCT公布。 公开号WO97 / 33734 PCT 日期1997年9月18日用于制造预应力混凝土构件的模床具有在床的两端之间延伸的模架（8）。 张紧头安装在床端，用于张紧加强绳索或在模腔中延伸的线（10）。 模具框架（8）包括纵向延伸的梁元件（4），该梁元件（4）承受构成由拉紧张力时被张紧头牵引的张力产生的反作用力的压力。 这些梁元件具有由连续或不连续延伸的套筒元件（5）围绕的长条（4），例如矩形轮廓的杆的形式。 因此，由于由绳索（10）中的张力产生的压力，杆（4）被侧向弯曲或断裂。 套筒元件（5）通过啮合在下面的锚固装置（14）加固。 例如，在棒（4）和套筒元件之间施加尼龙层或涂层，以便于杆和套筒元件之间的相对移动。 或者，为此可以使用轮子或辊子。
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公开(公告)号：US06036906A
公开(公告)日：2000-03-14
申请号：US902550
申请日：1997-07-29
申请人： Maher K. Tadros , Amin Einea , Mohsen Saleh
发明人： Maher K. Tadros , Amin Einea , Mohsen Saleh
摘要： A precast, prestressed concrete joist having web openings through which mechanical and electrical equipment may pass. In an exemplary embodiment, the joist comprises generally horizontal opposite top and bottom concrete members with a concrete web interposed between them. This web may have openings through which mechanical and electrical equipment may pass. Prestress steel strands may extend lengthwise through both the top and bottom members to provide prestress in the concrete joist. The concrete joist may further comprise strand restraining devices for deflecting the prestress steel strands. The precast, prestressed concrete joist having a web opening may be constructed using a reusable casting apparatus. This casting apparatus comprises a prestressing bed onto which a frame may be mounted. The frame provides a means of applying tension to the prestress steel strands and of supporting prestress strand restraining devices. A mold comprising an outer form and web opening forms may be attached to the prestressing bed. This mold may be used to cast the joist. The web opening forms preferably comprise a plurality of blocks which may be specially shaped to be removably attached together and secured to the prestressing bed to increase or decrease the span and depth of the desired web openings. The precast, prestressed concrete joist may be fabricated by first assembling the frame on a prestressing bed. The mold may next be assembled inside the frame. Strand restraining devices may be bolted to the frame by threaded rods. Prestress strands may then be threaded through these strand restraining devices and anchored to the frame. A prestressing force may then be applied to the prestress strands. Concrete is then poured into the mold and allowed to cure. The frame and mold are removed from around the finished joist.
摘要翻译： 一种预制的预应力混凝土托梁，具有网状开口，机械和电气设备可以通过该开口。 在示例性实施例中，托梁包括大致水平的相对的顶部和底部混凝土构件，其间插入有混凝土板。 该网可以具有通过机械和电气设备可以通过的开口。 预应力钢绞线可以纵向延伸穿过顶部和底部构件，以在混凝土托梁中提供预应力。 混凝土托梁还可以包括用于偏转预应力钢绞线的线束限制装置。 可以使用可重复使用的铸造装置来构造具有卷筒纸开口的预制的预应力混凝土托梁。 这种铸造装置包括预应力床，框架可安装在预应力床上。 框架提供了对预应力钢绞线和支撑预应力束限制装置施加张力的手段。 包括外部形式和腹板开口形式的模具可以附接到预应力床。 该模具可用于铸造托梁。 腹板开口形式优选地包括多个块，其可以被特别地成形为可移除地附接在一起并固定到预应力床，以增加或减小所需腹板孔的跨度和深度。 预制的预应力混凝土托梁可以通过首先将框架组装在预应力床上来制造。 模具可以在框架内组装。 绞线限制装置可以通过螺纹杆螺栓连接到框架。 然后可以将预应力绳穿过这些绞线限制装置并锚定到框架上。 然后可以将预应力施加到预应力股线。 然后将混凝土倒入模具中并使其固化。 框架和模具从成品托梁周围移除。
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7.发明授权Method and apparatus for producing prefabricated components from pretensioned prestressed concrete 失效预应力预应力混凝土预制构件的生产方法和装置
公开(公告)号：US5439629A
公开(公告)日：1995-08-08
申请号：US133061
申请日：1993-12-23
申请人： Joachim Heintz , Peter Auer , Helmut Lieske , Peter Plica
发明人： Joachim Heintz , Peter Auer , Helmut Lieske , Peter Plica
摘要： A method for the manufacture of pretensioned prestressed concrete sleepers wherein, the tensioning wires are taken directly from one or more rolls of wire and are introduced in a longitudinal feed into a tensioning frame, and the tensioning wires (5) are initially anchored at the end thereof located at the front in feed direction. The wires are tensioned by a tensioning device arranged outside of the tensioning frame and resting against the opposite end thereof, and the wires (5) are anchored at the tensioning device; only then are the wires severed by means of a severing device. In this manner, it is possible to combine in a single station the operating stages of cutting to length, introducing and tensioning the wires, which stages in the past were distributed over several manufacturing stations, so that the labor intensive and time consuming manipulation of wires which have been previously cut to length is eliminated.
摘要翻译： PCT No.PCT / EP93 / 00289 Sec。 371日期：1993年12月23日 102（e）日期1993年12月23日PCT提交1993年2月8日PCT公布。 第WO93 / 15889号公报 日本1988年8月19日。一种用于制造预应力预应力混凝土轨枕的方法，其中，拉伸线直接从一根或多根线材取出，并被引入纵向进料到张紧框架中，并且张紧线 ）最初锚定在位于进给方向前方的端部处。 电线被张紧装置张紧，该张紧装置布置在张紧框架的外部并抵靠其相对的端部，并且电线（5）被锚定在张紧装置上; 只有这些电线是通过切断装置切断的。 以这种方式，可以在单个工位中组合切割长度，引入和拉紧导线的操作阶段，过去的这些阶段分布在几个制造工位上，使得劳动密集和耗时的电线操纵 以前已经切割成长度被消除。
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8.发明授权
公开(公告)号：US4952129A
公开(公告)日：1990-08-28
申请号：US188201
申请日：1988-04-29
申请人： Amilcare Molin Zan
发明人： Amilcare Molin Zan
摘要： A plant to manufacture elongated concrete elements, particularly railway sleepers of prestressed reinforced concrete. In the plant according to the invention, the forms for the production of said elements are supported on carriages sliding along parallel side-by-side tracks, and the operating machines designed to perform in succession a series of operations on said forms are positioned into a limited working area, housed inside a shed, and are mounted above said tracks, substantially fixed in respect of the longitudinal axis of the tracks but movable transversely thereto. The curing area for the concrete elements is arranged externally to the working area. In the case of prestressed reinforced concrete elements, the tensioning device for the reinforcement strands are mounted directly on each of said slidable carriages supporting the forms.
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公开(公告)号：US4812113A
公开(公告)日：1989-03-14
申请号：US110731
申请日：1987-10-21
申请人： Steven L. Jantzen
发明人： Steven L. Jantzen
摘要： Prestressed concrete railroad ties are formed in molds which are supported by existing track near the area where they are to be installed. Each mold will form a number of ties. Reinforcing strands are located within a plurality of longitudinally spaced molds. Concrete is then poured into the molds and the ties are formed bottoms up in the molds. A group of ties are simultaneously removed from a given mold by a special extractor which first simultaneously clamps the reinforcing strands extending outwardly from a given mold, and then lifts the strands as a group from the mold by a suitable crane. Preferably the center of gravity of ties is spaced from a pivot point which will cause 180.degree. rotation locating the ties in upright position to be loaded on a railway car or other vehicle to take them to the site where they are to be installed.
摘要翻译： 预应力混凝土轨枕形成在模具中，这些模具由现有轨道支撑，靠近要安装的区域。 每个模具将形成许多关系。 加强股线位于多个纵向间隔的模具内。 然后将混凝土倒入模具中，并将连接件在模具中形成底部。 通过特殊的提取器同时从给定的模具中移除一组束带，其首先同时夹紧从给定模具向外延伸的增强线，然后通过合适的起重机将模具中的股线作为一组从模具提升。 优选地，连接件的重心与枢轴点间隔开，该枢轴点将导致180度的旋转，将连杆处于直立位置，将其装载在铁路车辆或其他车辆上，以将它们带到要安装的位置。
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公开(公告)号：US4629408A
公开(公告)日：1986-12-16
申请号：US773425
申请日：1985-09-06
申请人： Anthony S. Giron , Andrew T. Curd
发明人： Anthony S. Giron , Andrew T. Curd
CPC分类号： B28B23/043 , B28B23/06 , Y10T29/49874
摘要： A portable system for making harped, reinforced concrete beams includes a series of inverted T-shaped concrete bed sections, with aligned longitudinally extending holes for receiving tensioning cables to hold the sections together, to provide two beds, one on either side of the center wall of the sections, to make the concrete beams. At points near the center of each beam to be formed, arrangements for "harping" or depressing the longitudinally extending tensioning steel strands or cables are provided. The harping arrangements include a lever pivotally mounted on the central wall of the concrete sections to pivot in either direction to alternatively harp beams on either side, with intermediate lever actuated arrangements including a harping fork for engaging the steel strands, and screw threaded arrangements at the outer end of the lever for pulling the lever down toward the outer edge of the concrete bed, thereby depressing and harping the tensioning steel strands which are to be embedded in the concrete beams.
摘要翻译： 用于制造竖立的钢筋混凝土梁的便携式系统包括一系列倒置的T形混凝土床部分，具有对准的纵向延伸的孔，用于接收用于将部分保持在一起的张紧电缆，以提供两个床，一个在中心壁的两侧 的部分，制成混凝土梁。 在要形成的每个梁的中心附近的点处，提供用于“竖起”或者按压纵向拉伸的钢绞线或电缆的布置。 牵引装置包括枢转地安装在混凝土部分的中心壁上的杠杆，以便沿任一方向枢转以便在任一侧上竖起梁，中间杠杆致动装置包括用于接合钢绞线的叉形叉，以及螺纹装置 杠杆的外端将杠杆向下拉向混凝土床的外边缘，由此压下并收紧要嵌入在混凝土梁中的张紧钢绞线。
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