A stable structure of cast-in-situ formwork for inverted V-shaped pier body and pier top

Abstract

The application is suitable for the field of high-pier irregular pier body pouring construction, and provides a stable structure of inverted eight-shaped pier body pier top cast-in-place formwork, which comprises an anchor member climbing cone pre-embedded and a formwork installed on the inner and outer walls of the pier top, the formwork bottom is fixed with the pier top through the anchor member climbing cone, a pair of pull rods are transversely arranged in the pier top, and the pull rods pass through the formwork; the formwork comprises a panel, a wooden I-beam vertically arranged on the back of the panel, and double-spliced channel steel transversely arranged on the back of the wooden I-beam, the wooden I-beam and the double-spliced channel steel are connected through connecting claws, and the pull rods are locked with the formwork of the inner and outer walls of the pier top. The structure fully utilizes the tensile property of the pull rods when the outer wall is outward inclined and the compression property of the steel pipe when the inner wall is inward inclined, and fully solves the problem of the difficulty of self-stabilization of the formwork system of the inverted eight-shaped high-pier inward or outward inclined pier body by exerting the properties of the two. The application has the advantages of simple structure, good stability and reduced danger of high-altitude construction.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of high-pier irregular pier body pouring construction, and particularly relates to a stable structure of a reverse-eights-shaped pier body pier top cast-in-place formwork. BACKGROUND

[0002] With the development of bridge engineering in China, the structure form of high pier is more and more, and higher requirements are put forward for the stable system of pouring formwork.

[0003] In the pouring process of the reverse-eights-shaped pier body, the inner wall and the outer wall of the concrete have different inclination angles, resulting in inconsistent stress, and the ordinary formwork system cannot be applied. During the construction of the reverse-eights-shaped pier body section, the hydraulic climbing formwork system cannot continue to climb, the formwork system cannot continue to be used, and the concrete cannot be poured, resulting in that the subsequent work cannot be completed, and the construction difficulty is large and the risk is large. SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a stable structure of a reverse-eights-shaped pier body pier top cast-in-place formwork, which aims to solve the above technical problems.

[0005] The present application adopts the following technical scheme:

[0006] The stable structure of the reverse-eights-shaped pier body pier top cast-in-place formwork comprises an anchor member climbing cone pre-buried and a formwork installed on the inner and outer walls of the pier top, the formwork bottom and the pier top are fixed through the anchor member climbing cone, the pier top is provided with a pair of pull rods transversely penetrating, and the pull rods penetrate the formwork; the formwork comprises a panel, a wooden I-beam vertically arranged on the back of the panel, and a double-spliced channel steel transversely arranged on the back of the wooden I-beam, the wooden I-beam and the double-spliced channel steel are connected through a connecting claw, and the pair of pull rods are locked with the formwork of the inner and outer walls of the pier top.

[0007] Further, there are inclined face pads between the wooden I-beam and the double-spliced channel steel, the outer end of the pull rod is provided with a pad plate pressing the double-spliced channel steel, and the pull rod is locked through a nut.

[0008] Further, the double-spliced channel steel outside the formwork of the inner wall of the pier top is provided with a square wood, and the pull rod is provided with a bottom support, the bottom support supports the corresponding square wood, and the bottom support is fixed by a bolt.

[0009] Further, a round steel pipe is sleeved on the pull rod between the two bottom supports.

[0010] Further, a PVC pipe is pre-buried in the pier top.

[0011] The application has the beneficial effects that: the application sets the through tension rod in the hollow part of the thin-walled hollow pier and the self-stabilization of the outer sleeve steel pipe, ensures that the inverted V-shaped pier body does not collapse in the pouring process, the system fully utilizes the tension characteristics of the tension rod when the outer wall is inclined outward and the compression characteristics of the steel pipe when the inner wall is inclined inward, solves the problem of the difficulty of self-stabilization of the formwork system of the inverted V-shaped high pier body by exerting the characteristics of the two, and the application has the simple structure, good stability and reduced danger of high-altitude construction. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the structural diagram of the inverted V-shaped pier body pier top cast-in-place formwork stable structure provided by the embodiment of the application;

[0013] Figure 2 is the three-dimensional structural diagram of the formwork provided by the embodiment of the application;

[0014] Figure 3 is Figure 1 the enlarged view of A in the figure;

[0015] Figure 4 is Figure 1 the enlarged view of B in the figure;

[0016] Figure 5 is the three-dimensional structural diagram of the back joint double-spliced channel steel connection and fixation;

[0017] Figure 6 is the structural diagram of the connecting claw. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the application clearer and more apparent, the application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and do not limit the application.

[0019] In order to illustrate the technical scheme of the application, the following specific embodiments are used to illustrate the technical scheme of the application.

[0020] As Figure 1 , 2As shown, the inverted eight-shaped pier body and pier top cast-in-place formwork stable structure provided by the embodiment includes the anchor climbing cone 12 pre-embedded and the formwork 2 installed on the inner and outer walls of the pier body and the pier top, the bottom of the formwork 2 is fixed between the pier body and the pier top through the anchor climbing cone 12, the pier body and the pier top are provided with the tension rod 41 transversely and the tension rod 41 penetrates the formwork 2; the formwork 2 includes the panel 21, the wooden I-beam 22 vertically arranged on the back of the panel, and the double-spliced channel steel 23 transversely arranged on the back of the wooden I-beam, the wooden I-beam 22 and the double-spliced channel steel 23 are connected through the connecting claw 6, and the tension rod 41 is locked with the formwork 2 of the inner and outer walls of the pier body and the pier top. The support system is indicated by the mark 1 and includes the anchor climbing cone 12.

[0021] During construction, the anchor climbing cone 12 is pre-embedded on the top of the last poured concrete segment 11. There are multiple anchor climbing cones pre-embedded on the last poured concrete segment, and a certain length of the formwork 2 is reserved and wrapped on the last poured concrete segment 11 before installation. The formwork bottom is penetrated through the hole combination by the anchor climbing cone, and the formwork 2 bottom is locked by the pressing plate as the support for pouring this segment. The inner and outer walls are supported by multiple anchor climbing cones.

[0022] The formwork 2 includes the panel 21, the wooden I-beam 22, and the double-spliced channel steel 23, wherein the wooden I-beam is the main back rib of the panel, and the double-spliced channel steel is the secondary back rib of the panel. The main and secondary back ribs are connected by the connecting claw 6, and the hook 24 is arranged on the connecting claw. The panel 21 is the smooth panel VISA plate, the panel and the main back rib are made of wood, the holes are punched when the tension rod 41 penetrates, and the double-spliced channel steel 23 of the secondary back rib mainly increases the overall rigidity. The double-spliced channel steel 23 of the secondary back rib is connected with the wooden I-beam 22 of the main back rib by the opening and closing degree of the open connecting claw 6 hooking the double-spliced channel steel flange plate, the connecting claw 6 is in the shape of “Y”, and there is a “U”-shaped fastening plate in the middle of the connecting claw connecting joint. The double-spliced channel steel 23 web is provided with hole positions arranged at a certain interval, the hole positions are fixed by the slender bolt and nut after being centered, there is a certain distance between the back channel steels 23, the tension rod penetrates through the distance, and the end flange is provided with the pad plate 42 and the nut 43 for fastening.

[0023] In combination Figures 3-6 As shown, the PVC pipe 4 is pre-embedded in the pier body and the pier top for penetrating the tension rod 41. The fixed pad plate 42 and the nut 43 are arranged at the two ends of the tension rod 41, the wooden I-beam 22 and the double-spliced channel steel 23 are provided with the inclined surface pad 7, the outer end of the tension rod 41 penetrates the pad plate 42 to press the double-spliced channel steel 23, and is locked by the nut 43. The square timber 3 is arranged outside the double-spliced channel steel of the inner wall formwork of the pier body and the pier top, the bottom support 52 is arranged on the tension rod 41, the bottom support 52 supports the corresponding square timber 3, the bottom support 52 is fixed by the bolt 53, and the round steel pipe 51 is sleeved on the tension rod between the two bottom supports 52.

[0024] In the structure, the hollow part in the middle of the thin-walled hollow pier is provided with a through pull rod 41 penetrating into a matched hole steel pipe 51 and a bottom support 52, and is fixed by a bolt 53, and the bottom support 52 is applied to the double-spliced channel steel 23 through the square wood 3 below the bottom support 52. In the thin-walled pier body, the two ends of the inverted octagonal pier body are stabilized by the through pull rod 41, and the internal part is provided with the hole steel pipe 51 to prevent the inner wall plate from being extruded inward during the unbalanced pouring process. The bottom support 52 penetrating into the hole steel pipe 51 is tightened by rotating and tightening, and the bolt 53 is inserted after being punched.

[0025] In use, the template structure is installed on the inverted octagonal concrete pier section to be poured, the outer package length of the template 2 is selected according to the size and pouring height of the thin-walled pier section, the number of the template 2 is configured, the penetration position of the pull rod 41 is determined, the PVC pipe 44 is pre-buried during the installation of the concrete pier reinforcement, measures are taken to avoid the blockage of the PVC pipe 44 during the pouring process, the pull rod 41 is penetrated before pouring, and special attention is paid to the need for lining inclined surface pads 7 below the double-spliced channel steel on the back of the template, the surface of the pad far away from the template end is ensured to be vertical, which is mainly to ensure that the double-spliced channel steel 23 after installation is vertical, so that the pull rod 41 can be smoothly penetrated; after the pull rod 41 penetrates through the pier wall, the corresponding loading block square wood 3, bottom support 52 and hole steel pipe 51 are penetrated into the hollow pier body, the length of the two opposite inner walls is determined, the relative position of the bottom support 52 and the hole steel pipe 51 is rotated and tightened in time, and the upper and lower bolts 53 are clamped to ensure the stability of the two inner wall templates 2, and the symmetric pouring is adopted during pouring to avoid excessive unbalanced force.

[0026] The above only describes the preferred embodiments of the present application and does not limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A stable structure of cast-in-situ formwork for inverted-8-shaped pier body and pier top, characterized in that, The cast-in-place formwork stable structure comprises an anchor member pre-embedded cone and a formwork installed on the inner and outer walls of the pier body and the pier top, the bottom of the formwork is fixed with the pier body and the pier top through the anchor member cone, the pier body and the pier top are provided with a pair of pull rods which penetrate the formwork; the formwork comprises a panel, a wooden I-beam vertically arranged on the back of the panel, and double-spliced channel steel horizontally arranged on the back of the wooden I-beam, the wooden I-beam and the double-spliced channel steel are connected through connecting claws, the pair of pull rods are locked with the formwork on the inner and outer walls of the pier body and the pier top; there are inclined surface pads between the wooden I-beam and the double-spliced channel steel, the outer end of the pull rod is provided with a pad plate which presses the double-spliced channel steel and is locked through a nut; there are square woods outside the double-spliced channel steel of the formwork on the inner wall of the pier top, there are bottom supports on the pull rods, the bottom supports support the corresponding square woods, and the bottom supports are fixed through a bolt; a round steel pipe is sleeved on the pull rod between the two bottom supports.

2. The inverted octagon type pier body and pier top cast-in-place formwork stabilizing structure according to claim 1, characterized in that, A PVC pipe is pre-embedded in the pier body and the pier top.

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