A pipe section template pouring device

Abstract

A kind of pipe section template pouring device, it is related to pipe section processing technical field, including inner template, outer template of inner and outer cooperation, and the support system that forms inner support to the inner template, the pouring space of pipe section is formed between the inner periphery side of the inner template and the inner periphery side of the outer template, the support system can be adjusted to adapt to the inner template of different inner diameter.The utility model forms the pouring space of pipe section by inner and outer cooperation of inner template and outer template, while using adjustable support system to carry out inner support to inner template, to adapt to the inner template demand of different inner diameter.Improve the compatibility and pouring precision of template, reduce manufacturing cost, and enhance construction flexibility.

Description

Technical Field

[0001] This utility model relates to the field of pipe section processing technology, specifically to a pipe jacking section template casting device. Background Technology

[0002] In municipal engineering, underground utility tunnels, and tunnel projects, large-diameter pipe jacking technology is widely used due to its trenchless advantages. As a core component, the reinforced concrete pipe section's structural quality directly affects the project's safety and service life. Traditional pipe section prefabrication commonly uses simple wooden formwork or conventional steel formwork systems, which presents the following technical bottlenecks:

[0003] Wooden formwork is limited by its material properties, with a low modulus of elasticity (usually less than 10 GPa), and can withstand lateral pressures from concrete (up to 60-80 kN / m). 2 Under stress, the steel formwork is prone to deflection exceeding L / 200, resulting in a bursting accident rate as high as 15%-20%. Although steel formwork has high strength, stress concentration at welded joints can easily lead to local buckling instability.

[0004] Traditional formwork joints have an accuracy of less than ±2mm, and panel flatness deviation exceeds 3mm / m, resulting in a honeycomb and pitted surface defect rate of over 30% on the outer surface of the pipe sections. The 3-5mm amplitude generated during vibration will exacerbate the micro-vibration of the formwork, affecting the compactness of the concrete.

[0005] Fixed formwork systems are only compatible with a single pipe diameter (such as DN3000). When the pipe diameter needs to be changed for the project, the formwork needs to be remade, resulting in a formwork utilization rate of less than 40%. Modular modification increases manufacturing costs by 20%-30%, and the assembly error amplification effect is significant.

[0006] Therefore, the industry urgently needs to develop new template systems that can improve surface forming quality and dimensional adaptability while ensuring structural rigidity, so as to meet the high precision requirements of modern underground engineering for prefabricated pipe sections. Utility Model Content

[0007] The purpose of this utility model is to provide a pipe jacking section template casting device to solve the technical problems pointed out in the background art.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0009] A pipe jacking section formwork casting device includes an inner formwork, an outer formwork, and a support system that provides internal support for the inner formwork. A casting space for the pipe section is formed between the outer periphery of the inner formwork and the inner periphery of the outer formwork. The support system is adjustable to accommodate inner formworks with different inner diameters.

[0010] Furthermore, the support system includes columns erected axially within the inner template. Several support layers are evenly spaced horizontally along the vertical direction of the columns. Each support layer includes several horizontal braces and adjustable braces. The inner sides of the horizontal braces and adjustable braces are connected to the columns, and the outer sides are connected to the inner periphery of the inner template.

[0011] Furthermore, the adjustable support rod includes a first connecting rod, the inner end of which is hinged to the column and the outer end of which is hinged to the inner side of the vertical plate. The outer side of the vertical plate is fixedly connected to a second connecting rod. The second connecting rod is horizontally arranged, and a third connecting rod is symmetrically rotatably connected to both sides of the second connecting rod. The other end of the third connecting rod is rotatably connected to a fixed plate, and the fixed plate is fixedly connected to the inner template.

[0012] Furthermore, several pairs of tie rods are evenly spaced between the inner template and the outer template to position the distance between the inner template and the outer template.

[0013] Furthermore, it also includes an operating platform set on the top periphery of the outer template. The operating platform consists of a platform frame composed of several vertical bars, horizontal bars, and diagonal bars, as well as several steel plates or steel mesh laid on the platform frame.

[0014] Furthermore, the outer periphery of the inner template is smooth, the inner periphery of the outer template is smooth, the inner periphery of the inner template is vertically and evenly spaced with inner horizontal ribs, and the outer periphery of the outer template is vertically and evenly spaced with outer horizontal ribs.

[0015] Furthermore, the inner template, outer template, and support system are all made of steel, and the outer template is composed of two semi-circular outer templates connected as a whole by rotating and tightening bolts.

[0016] Furthermore, it also includes a concrete base, on which a slot is pre-set, and the column is fixedly engaged with the slot.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention effectively ensures the pouring quality of concrete for pipe jacking sections, mainly in the following aspects: First, the steel inner and outer formwork has advantages in strength, rigidity, and stability, which can effectively guarantee the technical conditions during concrete pouring and improve the pouring quality of pipe jacking sections. The use of multiple steel formworks can form an assembly line construction, which can accelerate the prefabrication efficiency of pipe sections. Second, the steel inner and outer formwork has good integrity and a relatively smooth pouring surface, which can effectively guarantee the appearance quality of the pipe jacking sections and reduce surface quality problems. The steel formwork can also provide a good curing environment, further improving the pouring quality. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0022] Figure 3 This is a schematic diagram of the structure of the present invention with an added operating platform. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] like Figure 1-3 As shown, a pipe jacking section formwork casting device includes an inner formwork 20 and an outer formwork 30 that cooperate with each other, and a support system 10 that provides internal support for the inner formwork 20. A casting space for the pipe section is formed between the outer periphery of the inner formwork 20 and the inner periphery of the outer formwork 30. The support system 10 is adjustable to accommodate inner formwork 20 with different inner diameters.

[0028] This invention utilizes inner and outer formwork to create the casting space for pipe sections, while an adjustable support system provides internal support for the inner formwork to accommodate different inner diameters. This improves formwork compatibility and casting accuracy, reduces manufacturing costs, and enhances construction flexibility.

[0029] Specifically, as shown in the figure, the support system 10 includes columns 11 erected axially within the inner template 20. Several support layers are evenly spaced horizontally along the vertical direction of each column 11. Each support layer includes several horizontal braces 12 and adjustable braces 13. The inner sides of the horizontal braces 12 and adjustable braces 13 are connected to the columns 11, and their outer sides are connected to the inner circumference of the inner template 20. Each adjustable brace 13 includes a first connecting rod 131. The inner end of the first connecting rod 131 is hinged to the column 11, and its outer end is hinged to the inner side of a vertical plate 133. The outer side of the vertical plate 133 is fixedly connected to a second connecting rod 133. The second connecting rod 133 is horizontally positioned, and third connecting rods 134 are symmetrically rotatably connected to both sides of the second connecting rod 133. The other end of the third connecting rod 134 is rotatably connected to a fixing plate 135, which is fixedly connected to the inner template 20.

[0030] The support system 10 consists of columns 11 erected axially within the inner formwork 20. The columns 11 are designed with evenly spaced support layers along their vertical direction to provide stable support for the inner formwork 20. Each support layer includes horizontal struts 12 and adjustable struts 13. The horizontal struts 12 are directly connected to the inner side of the columns 11, while their other ends are connected to the inner circumference of the inner formwork 20, forming a stable lateral support structure. This design helps prevent radial deformation of the inner formwork 20 during casting.

[0031] When the length of the adjustable strut 13 needs to be adjusted to accommodate inner formwork 20s with different inner diameters, this can be achieved by changing the angle between the first connecting rod 131 and the vertical plate 133, and the angle between the third connecting rod 134 and the fixed plate 135. This structure allows the adjustable strut 13 to maintain a certain rigidity while also allowing for fine-tuning of its length as needed, thereby ensuring that the support system 10 can closely fit and support the inner circumference of the inner formwork 20. During the pouring process, the space formed between the inner formwork 20 and the outer formwork 30 is filled with concrete. Because the support system 10 provides stable support, the inner formwork 20 can maintain its shape and position, thereby ensuring that the poured pipe section has the required dimensional and shape accuracy.

[0032] Specifically, as shown in the figure, several tie rods 40 are evenly spaced between the inner template 20 and the outer template 30 to position the distance between them. The tie rods 40, also known as through-wall bolts, are installed between the inner template 20 and the outer template 30, and their main function is to position and maintain a constant distance between the inner and outer templates. These bolts are typically evenly distributed along the vertical and horizontal directions of the templates to ensure the overall stability and rigidity of the template system. Before pouring concrete, the tie rods 40 are pre-tightened to generate sufficient tension to resist the lateral pressure of the concrete and other external loads that may deform the template. This pre-tightening ensures that the inner and outer templates fit tightly during pouring and maintain their designed shape. After the concrete is poured and hardened, the tie rods 40 can also serve as fulcrums for template dismantling, helping construction workers to remove the templates more easily. After the templates are removed, the tie rods 40 can be taken out and reused, which reduces construction costs and improves efficiency.

[0033] Specifically, as shown in the figure, it also includes an operating platform 50 set on the top periphery of the outer template 30. The operating platform 50 is composed of a platform frame consisting of several vertical bars, horizontal bars, and diagonal bars, as well as several steel plates or steel mesh laid on the platform frame.

[0034] Vertical bars are the vertical support components of the platform frame. They are securely installed around the top perimeter of the outer formwork 30, ensuring the vertical stability and height of the platform frame. Horizontal bars connect adjacent vertical bars, forming the horizontal support structure of the platform frame. These horizontal bars not only enhance the overall rigidity of the frame but also provide a support surface for laying steel plates or steel mesh. Diagonal bars are the diagonal support components of the platform frame. They are installed between the vertical and horizontal bars to form a stable triangular or similar triangular structure. The presence of diagonal bars greatly enhances the platform frame's resistance to overturning and deformation. Steel plates or steel mesh are evenly laid on the platform frame, covering the entire surface of the operating platform, providing a safe and stable working area for construction workers. The steel plates or steel mesh have high load-bearing capacity and anti-slip properties, capable of supporting the weight of construction workers and the weight of their tools and materials. Furthermore, the surface of the steel plates or steel mesh is usually treated with anti-slip material to prevent workers from slipping or falling during construction. The operating platform 50 allows construction workers to perform operations such as tying rebar, pouring concrete, and installing embedded parts in a safe and stable environment. This not only improves construction efficiency but also reduces construction risks.

[0035] Specifically, as shown in the figure, the outer periphery of the inner template 20 is smooth, and the inner periphery of the outer template 30 is smooth. The inner periphery of the inner template 20 is vertically and evenly spaced with inner horizontal ribs 21, and the outer periphery of the outer template 30 is vertically and evenly spaced with outer horizontal ribs 32 and horizontally and evenly spaced with outer vertical ribs 31. The inner template 20 and outer template 30 are used to form the inner cavity and outer wall of the structure, respectively. The smooth outer and inner periphery of the templates helps reduce friction with the concrete, facilitating demolding. The inner horizontal ribs 21, outer horizontal ribs 32, and outer vertical ribs 31 enhance the overall rigidity and stability of the template system. These ribs provide support during concrete pouring, preventing template deformation.

[0036] Specifically, as shown in the figure, the inner template 20, the outer template 30, and the support system 10 are all made of steel. The outer template 30 is composed of two semi-circular outer templates connected as a whole by rotating and tightening bolts.

[0037] Specifically, as shown in the figure, it also includes a concrete base, on which a slot is pre-set, and the column 11 is fixedly engaged with the slot.

[0038] Specifically, the specific implementation process of this utility model is as follows:

[0039] 1. Steel inner formwork installation. After the base concrete meets the requirements, first anchor the columns in the base slots, then hoist the steel inner formwork onto the base and weld the support columns and steel inner formwork together using structural steel and other components.

[0040] 2. Installation and positioning of the steel outer formwork. Before positioning the outer formwork, place the bottom formwork and water-stop ring (both are circular steel plates of a certain thickness) on the foundation concrete. The bottom formwork should be placed flat on the foundation, and the water-stop ring should be erected on the foundation with its surface against the inside of the steel outer formwork. Hoist the two steel outer formwork panels onto the concrete foundation one after the other. Install bolts at the joint of the two formwork panels, rotating and tightening the bolts to ensure there are no obvious gaps at the joint. Finally, install the tie bolt devices according to the pre-drilled tie bolt holes on the inner and outer steel formwork panels.

[0041] 3. Installation of the operating platform. Weld several steel pipes (or reinforcing bars) to the top of the outer formwork to form the operating platform frame as required. Then, fully cover the operating platform frame with steel plates or perforated steel mesh. Finally, weld the simple ladder (made of welded reinforcing bars) firmly to the outer formwork to complete the operating platform. Personnel can climb the ladder to access the operating platform.

[0042] This invention effectively ensures the pouring quality of concrete for pipe jacking sections, mainly in the following aspects: First, the steel inner and outer formwork has advantages in strength, rigidity, and stability, which can effectively guarantee the technical conditions during concrete pouring and improve the pouring quality of pipe jacking sections. The use of multiple steel formworks can form an assembly line construction, which can accelerate the prefabrication efficiency of pipe sections. Second, the steel inner and outer formwork has good integrity and a relatively smooth pouring surface, which can effectively guarantee the appearance quality of the pipe jacking sections and reduce surface quality problems. The steel formwork can also provide a good curing environment, further improving the pouring quality.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pipe jacking section formwork casting device, characterized in that, It includes an inner template, an outer template, and a support system that provides internal support for the inner template. A casting space for a pipe section is formed between the outer periphery of the inner template and the inner periphery of the outer template. The support system is adjustable to accommodate inner templates with different inner diameters.

2. The pipe jacking section formwork casting device according to claim 1, characterized in that, The support system includes columns erected axially within the inner template. Several support layers are evenly spaced horizontally along the vertical direction of the columns. Each support layer includes several horizontal braces and adjustable braces. The inner sides of the horizontal braces and adjustable braces are connected to the columns, and the outer sides are connected to the inner circumference of the inner template.

3. The pipe jacking section formwork casting device according to claim 2, characterized in that, The adjustable support rod includes a first connecting rod, the inner end of which is hinged to the column and the outer end of which is hinged to the inner side of the vertical plate. The outer side of the vertical plate is fixedly connected to a second connecting rod. The second connecting rod is horizontally arranged, and a third connecting rod is symmetrically rotatably connected to both sides of the second connecting rod. The other end of the third connecting rod is rotatably connected to a fixed plate, and the fixed plate is fixedly connected to the inner template.

4. The pipe jacking section formwork casting device according to claim 3, characterized in that, Several pairs of tie rods are evenly spaced between the inner and outer templates to position the distance between them.

5. The pipe jacking section formwork casting device according to claim 4, characterized in that, It also includes an operating platform set on the top periphery of the outer template. The operating platform consists of a platform frame composed of several vertical bars, horizontal bars, and diagonal bars, as well as several steel plates or steel mesh laid on the platform frame.

6. The pipe jacking section formwork casting device according to claim 5, characterized in that, The outer periphery of the inner template is smooth, the inner periphery of the outer template is smooth, and the inner periphery of the inner template is provided with inner horizontal ribs at uniform vertical intervals. The outer periphery of the outer template is provided with outer horizontal ribs at uniform vertical intervals and outer vertical ribs at uniform horizontal intervals.

7. The pipe jacking section formwork casting device according to claim 6, characterized in that, The inner template, outer template, and support system are all made of steel. The outer template is composed of two semi-circular outer templates connected together by rotating and tightening bolts.

8. A pipe jacking section formwork casting device according to claim 7, characterized in that, It also includes a concrete base, on which a slot is pre-set, and the column is fixedly engaged with the slot.

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