Device and method for accurate positioning of railway subgrade contact network foundation

Abstract

The present application discloses a device and method for accurate positioning of the contact network foundation of a railway roadbed, including a template assembly, a support rod, and an elevation adjustment assembly; the elevation adjustment assembly is arranged on the outside of the template assembly, and is used to adjust the elevation and horizontality of the template assembly; the template assembly includes a front template, a rear template, a left template, and a right template; the left template and the right template are perpendicular to the extension direction of the railway, and the support rod is parallel to the extension direction of the railway, and the support rod is arranged as two and detachable upper ends passing through the left template and the right template; the upper end surface of the support rod located in the casting area is provided with a positioning groove, and the size of the positioning groove matches the size of the fixed steel plate in the steel frame, and is used to position and fix the steel plate. The present application solves the problem that the embedded steel plates and anchor bolts of the roadbed contact network foundation of the related technology are not accurately positioned during the construction process, which affects the installation of the contact network columns and other adverse effects, and buries quality and safety hazards to the subsequent construction and operation safety.

Description

Technical Field

[0001] The present application relates to the field of railway engineering technology, and in particular to a device and method for accurately positioning a railway subgrade contact network foundation. Background Art

[0002] With the development of my country's railways, from green trains with a speed of tens of kilometers per hour to high-speed trains with a speed of more than 300 kilometers per hour, the speed has increased beyond people's imagination, and the source of power for high-speed railways - the contact network has played an indispensable role. The contact network is responsible for the important task of directly transmitting the power obtained from the traction substation to the electric locomotive. Therefore, the quality and working condition of the contact network will directly affect the transportation capacity of the electrified railway.

[0003] The high-speed railway subgrade foundation network is basically a suspension type, which is a suspension form in which a contact wire is directly fixed on the column support device. The quality of the contact network foundation is related to the service life of the column and affects the working condition of the entire contact network. Therefore, the position accuracy of the embedded steel plate and anchor bolts of the contact network foundation will affect whether the contact network column can be installed smoothly and the safety quality.

[0004] The contact network foundation of the roadbed consists of two parts: a circular cross-section pile foundation and a rectangular pile cap. Both the pile foundation and the pile cap have a certain degree of buried depth. During the construction process, in order to ensure the integrity of the pile foundation and the pile cap, the pile foundation can be drilled, and then the rectangular foundation of the pile cap can be excavated. Then, the pile foundation steel cage and the rectangular steel frame of the pile cap can be hoisted, and the exposed part can be put into the steel formwork and cast as a whole at one time. Therefore, it is particularly important to control the positioning accuracy of the steel cage and the embedded steel plate and anchor bolts.

[0005] However, in the routine process of roadbed contact network foundation, when pile foundation and rectangular pile cap are used for one-time casting, the steel cage often deviates during the casting process after being lowered, or the position of the embedded steel plate and anchor bolts is inaccurate, which affects the installation of the contact network columns and other adverse effects, posing quality and safety hazards to subsequent construction and operation safety. Summary of the invention

[0006] The main purpose of this application is to provide a device and method for accurately positioning the railway roadbed contact network foundation, so as to solve the problem that the roadbed contact network foundation of the related technology has inaccurate positioning of the embedded steel plates and anchor bolts during the construction process, affecting the installation of the contact network columns, and posing quality and safety hazards to the subsequent construction and operation safety.

[0007] In order to achieve the above-mentioned purpose, the present application provides a device for accurately positioning the contact network foundation of a railway roadbed, the device for accurately positioning the contact network foundation of a railway roadbed comprises: a template assembly, a support rod, and an elevation adjustment assembly; wherein:

[0008] The elevation adjustment component is arranged on the outside of the template component and is used to adjust the elevation and levelness of the template component;

[0009] The template assembly comprises a front template, a rear template, a left template and a right template, wherein the front template, the rear template, the left template and the right template are connected end to end to form a casting area;

[0010] The left template and the right template are perpendicular to the extension direction of the railway, the support rod is parallel to the extension direction of the railway, and the support rod is provided in two pieces and detachably passes through the upper ends of the left template and the right template;

[0011] A positioning groove is provided on the upper end surface of the portion of the support rod located in the casting area. The size of the positioning groove matches the size of the fixed steel plate in the steel bar skeleton and is used to position and fix the steel plate.

[0012] Furthermore, the upper ends of the left template and the right template are provided with mounting grooves, and the support rods pass through the mounting grooves.

[0013] Furthermore, mounting holes are provided at the upper ends of the left template and the right template, and the support rod passes through the mounting holes.

[0014] Furthermore, the number of elevation adjustment components is four and they are arranged at the four corners of the template component.

[0015] Furthermore, the elevation adjustment assembly includes a positioning steel plate and an adjusting bolt, wherein the positioning steel plate is arranged at the four corners of the template assembly;

[0016] The lower end of the adjusting bolt is fixedly connected to the mounting base, and two adjusting nuts are arranged on the upper end of the adjusting bolt. An adjusting nut extends from the upper end of the adjusting bolt and passes through the positioning steel plate and is threadedly connected with the other adjusting nut. The positioning steel plate is fixed between the two adjusting nuts.

[0017] Furthermore, two of the positioning steel plates are arranged at the front end of the front template, and the other two positioning steel plates are respectively arranged at the rear end of the left template and the rear end of the right template.

[0018] Furthermore, the upper end surfaces of the front template and the rear template are flush with the upper surface of the embedded steel plate in the steel bar skeleton;

[0019] The vertical height difference between the lower end surface of the positioning groove and the upper end surface of the front template is equal to the vertical height difference between the lower end surface of the fixed steel plate in the steel bar skeleton and the upper end surface of the embedded steel plate.

[0020] Furthermore, the distance between the outer sides of the two support rods is equal to the distance between the inner sides of the two rows of anchor bolts in the steel bar skeleton.

[0021] According to another aspect of the present application, there is provided a railway subgrade contact network foundation construction component comprising: a pile foundation, a pile cap, a steel bar skeleton and the above-mentioned railway subgrade contact network foundation construction component;

[0022] The pile cap is opened at the upper end of the pile foundation, and the diameter of the pile cap is larger than the diameter of the pile foundation;

[0023] The template assembly is fixed in the pile cap, the lower end of the steel frame passes through the pile cap and the pile foundation in sequence, and the upper end extends out of the pile cap; the portion of the steel frame extending out of the pile foundation is provided with embedded steel plates and fixed steel plates in sequence from bottom to top;

[0024] The embedded steel plate is connected to the fixed steel plate through two rows of anchor bolts. The upper ends of the anchor bolts extend out of the fixed steel plate, and the fixed steel plate is embedded in the positioning groove on the support rod.

[0025] Furthermore, outer sides of the two support rods respectively abut against inner sides of the two rows of anchor bolts.

[0026] According to another aspect of the present application, a method for accurately positioning a railway subgrade contact network foundation is provided, using the above-mentioned device for accurately positioning a railway subgrade contact network foundation, and the following steps:

[0027] Excavate the pile foundation, and after completion, excavate a rectangular cross-section pile cap on top of the pile foundation;

[0028] After the formwork assembly is installed in the pile cap and the pouring area is formed;

[0029] The elevation adjustment component adjusts the elevation and levelness of the formwork component and fixes the formwork component so that the positioning groove is located at the elevation position of the fixed steel plate after the support rod is installed on the formwork component;

[0030] At the same time, the steel frame, embedded steel plate and anchor bolts are welded in the factory according to the design requirements. After welding, the nuts are fixed on the embedded steel plate and tightened. Then the fixed steel plate is installed through the anchor bolts. The fixed steel plate is located above the embedded steel plate.

[0031] Use a crane to lower the pile foundation steel cage. When the pile foundation steel cage is lowered to 50-100cm above the top steel bar ground, pass the support rod through the left formwork, pile foundation steel cage and right formwork in sequence, and use the support rod to temporarily support the pile foundation steel cage.

[0032] Lift the steel frame and weld the lower end of the steel frame and the upper end of the pile foundation steel cage. After welding, hoist the pile foundation steel cage and the steel frame as a whole to a certain height;

[0033] Remove the support rods from the formwork assembly, and then lower the pile foundation reinforcement cage and reinforcement skeleton as a whole;

[0034] When the embedded steel plate in the steel frame is lowered to the designed position, the support rod is passed through the left formwork, the steel frame and the right formwork in sequence, and the positioning groove on the support rod is aligned with the fixed steel plate in the steel frame;

[0035] Lower the steel bar skeleton until the fixed steel plate falls into the positioning groove.

[0036] In the embodiment of the present application, a formwork assembly, a support rod, and an elevation adjustment assembly are provided; the elevation adjustment assembly is provided on the outside of the formwork assembly for adjusting the elevation and horizontality of the formwork assembly; the formwork assembly includes a front formwork, a rear formwork, a left formwork, and a right formwork, and the front formwork, the rear formwork, the left formwork, and the right formwork are connected end to end to form a casting area; the left formwork and the right formwork are perpendicular to the extension direction of the railway, and the support rod is parallel to the extension direction of the railway, and the support rod is provided with two and detachable upper ends passing through the left formwork and the right formwork; a positioning groove is provided on the upper end surface of the part of the support rod located in the casting area, and the size of the positioning groove matches the size of the fixed steel plate in the steel frame, and is used to position and fix the steel plate, so as to achieve the effect of the support rod being aligned with the steel frame after the steel frame is lowered. The fixed steel plate in the steel frame is supported and limited in the positioning groove on the support rod. The fixed steel plate is positioned by the positioning groove. At the same time, the anchor bolts installed on the fixed steel plate and the embedded steel plate connected to the anchor bolts are positioned. Therefore, the position of the steel cage and the steel frame, the embedded steel plate and the anchor bolt are accurately positioned to ensure that there will be no deviation during the concrete pouring and vibration process. The operation is simple and is conducive to improving the technical effect of construction efficiency. Furthermore, the problem of inaccurate positioning of the embedded steel plates and anchor bolts in the roadbed contact network foundation of related technologies during construction, affecting the installation of contact network columns and other adverse effects, burying quality and safety hazards for subsequent construction and operation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0038] Figure 1 is a schematic diagram of a top view structure according to an embodiment of the present application;

[0039] Figure 2 is a schematic diagram of the side view structure of AA according to an embodiment of the present application;

[0040] Figure 3 is a schematic diagram of a side view structure according to an embodiment of the present application;

[0041] Figure 4 It is a schematic diagram of the structure of the front template and the rear template according to the embodiment of the present application;

[0042] Figure 5 It is a schematic diagram of the structure of the left template and the right template according to the embodiment of the present application;

[0043] Figure 6 It is a schematic diagram of the support rod structure according to an embodiment of the present application;

[0044] Among them, 1 roadbed cable trough, 2 formwork assembly, 21 left formwork, 22 right formwork, 23 front formwork, 24 rear formwork, 3 elevation adjustment assembly, 31 positioning steel plate, 32 adjusting bolts, 4 fixing steel plates, 5 anchor bolts, 6 support rods, 61 positioning grooves, 7 embedded steel plates, and 8 installation grooves. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0046] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0047] In this application, the terms "upper", "lower", "inner", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0048] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0049] In addition, the terms "disposed", "provided with", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0050] In addition, the term "plurality" shall mean two or more.

[0051] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0052] The contact network foundation of the roadbed consists of two parts: a circular cross-section pile foundation and a rectangular pile cap. Both the pile foundation and the pile cap have a certain degree of buried depth. During the construction process, in order to ensure the integrity of the pile foundation and the pile cap, the pile foundation can be drilled, and then the rectangular foundation of the pile cap can be excavated. Then, the pile foundation steel cage and the rectangular steel frame of the pile cap can be hoisted, and the exposed part can be put into the steel formwork and cast as a whole at one time. Therefore, it is particularly important to control the positioning accuracy of the steel cage and the embedded steel plate and anchor bolts.

[0053] However, in the routine process of roadbed contact network foundation, when pile foundation and rectangular pile cap are used for one-time casting, the steel cage often deviates during the casting process after being lowered, or the position of the embedded steel plate and anchor bolts is inaccurate, which affects the installation of the contact network columns and other adverse effects, posing quality and safety hazards to subsequent construction and operation safety.

[0054] To solve the above technical problems, Figures 1 to 6 As shown, the embodiment of the present application provides a device for accurately positioning the contact network foundation of a railway roadbed, and the device for accurately positioning the contact network foundation of a railway roadbed includes: a template component 2, a support rod 6, and an elevation adjustment component 3; wherein,

[0055] The elevation adjustment component 3 is arranged on the outer side of the formwork component 2, and is used to adjust the elevation and levelness of the formwork component 2;

[0056] The formwork assembly 2 includes a front formwork 23, a rear formwork 24, a left formwork 21 and a right formwork 22, and the front formwork 23, the rear formwork 24, the left formwork 21 and the right formwork 22 are connected end to end to form a casting area;

[0057] The left template 21 and the right template 22 are perpendicular to the extension direction of the railway, the support rod 6 is parallel to the extension direction of the railway, and the support rod 6 is provided in two and detachably passes through the upper ends of the left template 21 and the right template 22;

[0058] A positioning groove 61 is formed on the upper end surface of the portion of the support rod 6 located in the casting area. The size of the positioning groove 61 matches the size of the fixed steel plate 4 in the steel bar skeleton and is used to position and fix the steel plate 4.

[0059] In this embodiment, the positioning device is mainly composed of a template assembly 2, a support rod 6, and an elevation adjustment assembly 3. The template assembly 2 serves as a pouring template for the concrete of the pile cap portion, and the elevation adjustment assembly 3 is installed on the template assembly 2 to adjust the elevation and level of the template assembly 2. In this embodiment, the elevation and level of the template assembly 2 will directly affect the positioning accuracy of the embedded steel plate 7, the fixed steel plate 4, and the anchor bolts 5 on the steel frame. Therefore, in order to facilitate the adjustment of the elevation and level of the template assembly 2, the elevation adjustment assembly 3 can be installed around the template assembly 2, and the elevation and level of the template assembly 2 can be precisely adjusted through multiple elevation adjustment assemblies 3.

[0060] Since a rectangular concrete structure needs to be cast at the pile cap, the formwork assembly 2 is also arranged as a rectangular structure, which is composed of a front formwork 23, a rear formwork 24, a left formwork 21 and a right formwork 22. The front formwork 23, the rear formwork 24, the left formwork 21 and the right formwork 22 are connected end to end to form a casting area, and concrete can be cast in the casting area during construction to form the required concrete components. According to the construction requirements of the contact network foundation, the final concrete component needs to be parallel to the extension direction of the railway. Therefore, in this embodiment, the left formwork 21 and the right formwork 22 are perpendicular to the extension direction of the railway, and the support rod 6 is parallel to the extension direction of the railway.

[0061] The steel skeleton needs to be hoisted into the excavated pile foundation and pile cap before pouring, that is, the upper end of the steel skeleton will be located in the pouring area surrounded by four templates. The embedded steel plate 7, fixed steel plate 4 and anchor bolts 5 are installed on the steel skeleton in the factory according to the design requirements. During installation, the steel skeleton with embedded steel plate 7, fixed steel plate 4 and anchor bolts 5 is hoisted into the pile foundation as a whole. During the pouring process, the positions of the embedded steel plate 7, fixed steel plate 4 and anchor bolts 5 will directly feel the final position after forming.

[0062] Therefore, it is necessary to ensure that the three are in the designed position before and during the pouring. To this end, a support rod 6 is provided in the present embodiment. The support rod 6 is parallel to the extension direction of the railway and is provided in at least two pieces. A positioning groove 61 is provided at the upper end of the support rod 6. The positioning grooves 61 on the two support rods 6 together form a rectangular positioning area. Since the size of the positioning groove 61 matches the size of the fixed steel plate 4, when the fixed steel plate 4 is located in the positioning groove 61, the positioning groove 61 can limit the fixed steel plate 4. That is, when the support rod 6 is in the designed position, the positioning groove 61 is in the designed position, and the fixed steel plate 4 is also in the designed position. Similarly, the anchor bolts 5 and the embedded steel plate 7 connected thereto are all in the designed position.

[0063] Specifically, in order to enable the support rod 6 to position the fixed steel plate 4. In actual construction, a long steel cage is required according to the depth of the pile foundation. For the convenience of transportation and hoisting, the entire steel structure is divided into two parts, one is the steel cage and the other is the steel skeleton.

[0064] During construction, the support rod 6 is first removed from the formwork assembly 2, and then the steel cage is hoisted into the pile foundation and suspended. At this time, the support rod 6 passes through the formwork assembly 2 and the steel cage to temporarily support the steel cage. Then the steel skeleton is hoisted, and the lower end of the steel skeleton is welded and fixed to the upper end of the steel cage. Then the support rod 6 is removed, and the steel cage and the steel skeleton are lowered to the designed position as a whole. At this time, the support rod 6 is passed through the formwork assembly 2, and the positioning groove 61 is in the designed position. Finally, the entire steel structure is lowered and the fixed steel plate 4 on the steel skeleton is embedded in the positioning groove 61. Since the support rod 6 passes through the formwork assembly 2, it is only movable in the direction along the extension of the railway, so that it is more convenient to adjust the positioning groove 61 to the designed position. At the same time, after the support rod 6 contacts the fixed steel plate 4, the support rod 6 will not be displaced along the extension direction of the railway under the gravity of the entire steel structure, so that the entire steel structure is positioned.

[0065] The present embodiment achieves the purpose of supporting the fixed steel plate 4 in the steel frame by the support rod 6 after the steel frame is lowered, and limiting the fixed steel plate 4 in the positioning groove 61 on the support rod 6, positioning the fixed steel plate 4 by the positioning groove 61, and positioning the anchor bolt 5 installed on the fixed steel plate 4, and the embedded steel plate 7 connected to the anchor bolt 5, thereby achieving the purpose of accurately positioning the steel cage and the steel frame, the embedded steel plate 7 and the anchor bolt 5, ensuring that no deviation occurs during the concrete pouring and vibration process, simple operation, and conducive to improving the technical effect of construction efficiency, thereby solving the problem that the embedded steel plate 7 and the anchor bolt 5 of the roadbed contact network foundation in the related technology are not accurately positioned during the construction process, affecting the installation of the contact network column, and burying quality and safety hazards for subsequent construction and operation safety.

[0066] In order to allow the support rod 6 to pass through the upper ends of the left template 21 and the right template 22, the upper ends of the left template 21 and the right template 22 are provided with mounting grooves 8, through which the support rod 6 passes, and the upper ends of the mounting grooves 8 are open, so that the support rod 6 can be removed along the direction of the opening or pulled out horizontally when disassembled. Since the upper ends of the mounting grooves 8 are open, when the steel skeleton is supported and positioned by the support rod 6, the cooperation between the support rod 6 and the template assembly 2 can well limit the displacement of the steel skeleton in the horizontal direction, but cannot well prevent the steel skeleton from floating up.

[0067] Therefore, in order to prevent the steel skeleton from floating up during the pouring process, the upper ends of the left template 21 and the right template 22 are provided with mounting holes, and the support rod 6 passes through the mounting holes. The mounting holes are a closed structure in the circumference relative to the mounting groove 8. When the support rod 6 passes through the mounting holes, the support rod 6 can be limited in all directions by the mounting holes. After the template assembly 2 is fixed to the ground (installation foundation), the support rod 6 can better position the steel skeleton and prevent the steel skeleton from floating up or moving horizontally. The support rod 6 can be made of channel steel.

[0068] like Figure 2 and Figure 3 As shown, in order to facilitate the adjustment of the elevation and levelness of the template assembly 2, the elevation adjustment assembly 3 includes a positioning steel plate 31 and an adjusting bolt 32, and the positioning steel plate 31 is arranged at the four corners of the template assembly 2;

[0069] The lower end of the adjusting bolt 32 is fixedly connected to the installation base, and two adjusting nuts are arranged on the upper end of the adjusting bolt 32. An adjusting nut extends from the upper end of the adjusting bolt 32 and passes through the positioning steel plate 31 and is threadedly connected with the other adjusting nut. The positioning steel plate 31 is fixed between the two adjusting nuts.

[0070] Specifically, when adjusting the elevation, the adjusting nut at the top can be rotated to move it upward, and then the adjusting nut at the bottom can be rotated to adjust the height of the positioning steel plate 31, that is, to adjust the height of the formwork assembly 2. After the adjustment is in place, the adjusting nut at the top is rotated to move it downward and lock the positioning steel plate 31, so that the formwork assembly 2 is positioned at the set elevation. The levelness of the formwork assembly 2 can be adjusted by cooperating with the elevation adjustment components 3 in four directions.

[0071] According to the design and construction requirements, the pile cap concrete component is relatively close to the roadbed cable trough, so there is no installation position for the positioning steel plate 31 and the adjusting bolt 32 on the side of the template assembly 2 close to the roadbed cable trough. In order to ensure that the four positioning steel plates 31 can be located at the four corners of the template assembly 2, two positioning steel plates 31 are arranged at the front end of the front template 23, and the other two positioning steel plates 31 are respectively arranged at the rear end of the left template 21 and the rear end of the right template 22.

[0072] The upper end surfaces of the front template 23 and the rear template 24 are flush with the upper surface of the embedded steel plate 7 in the steel skeleton. After the concrete is poured, the embedded steel plate 7 is just embedded in the concrete, and its upper end surface is flush with the upper end surface of the concrete member.

[0073] Since there is a height difference between the embedded steel plate 7 and the fixed steel plate 4 in the steel frame, the anchor bolts 5 are connected between the two, and the support rods 6 need to position and support the fixed steel plate 4 through the positioning grooves 61, so the height position of the positioning grooves 61 needs to have a certain relationship with the position of the embedded steel plate 7. In this embodiment, the vertical height difference between the lower end surface of the positioning groove 61 and the upper end surface of the front template 23 is equal to the vertical height difference between the lower end surface of the fixed steel plate 4 in the steel frame and the upper end surface of the embedded steel plate 7.

[0074] In the steel frame, the lower and upper ends of the anchor bolts 5 are positioned by the embedded steel plate 7 and the fixed steel plate 4, respectively. Since the fixed steel plate 4 needs to be removed at the end of the construction, leaving only the anchor bolts 5 and the embedded steel plate 7, in order to keep the upper end of the anchor bolts 5 still have a certain positioning accuracy, the spacing between the outer sides of the two support rods 6 in this embodiment is equal to the spacing between the inner sides of the two rows of anchor bolts 5 in the steel frame, and the displacement of the anchor bolts 5 in one direction can be limited by the support rods 6. At the same time, the friction generated by the contact between the two can also well limit the tendency of the steel frame to drive the support rods 6 to move during the casting process.

[0075] According to another aspect of the present application, there is provided a railway subgrade contact network foundation construction component comprising: a pile foundation, a pile cap, a steel bar skeleton and the above-mentioned railway subgrade contact network foundation construction component;

[0076] The pile cap is opened at the upper end of the pile foundation, and the diameter of the pile cap is larger than the diameter of the pile foundation;

[0077] The template assembly 2 is fixed in the pile cap, the lower end of the steel skeleton passes through the pile cap and the pile foundation in sequence, and the upper end extends out of the pile cap; the portion of the steel skeleton extending out of the pile foundation is provided with an embedded steel plate 7 and a fixed steel plate 4 in sequence from bottom to top;

[0078] The embedded steel plate 7 is connected to the fixed steel plate 4 through two rows of anchor bolts 5 . The upper ends of the anchor bolts 5 extend out of the fixed steel plate 4 , and the fixed steel plate 4 is embedded in the positioning groove 61 on the support rod 6 .

[0079] Furthermore, outer sides of the two support rods 6 abut against inner sides of the two rows of anchor bolts 5 respectively.

[0080] According to another aspect of the present application, a method for accurately positioning a railway subgrade contact network foundation is provided, using the above-mentioned device for accurately positioning a railway subgrade contact network foundation, and the following steps:

[0081] Excavate the pile foundation, and after completion, excavate a rectangular cross-section pile cap on top of the pile foundation;

[0082] After the formwork assembly is installed in the pile cap and the pouring area is formed;

[0083] The elevation adjustment component adjusts the elevation and levelness of the formwork component and fixes the formwork component so that the positioning groove is located at the elevation position of the fixed steel plate after the support rod is installed on the formwork component;

[0084] At the same time, the steel frame, embedded steel plate and anchor bolts are welded in the factory according to the design requirements. After welding, the nuts are fixed on the embedded steel plate and tightened. Then the fixed steel plate is installed through the anchor bolts. The fixed steel plate is located above the embedded steel plate.

[0085] Use a crane to lower the pile foundation steel cage. When the pile foundation steel cage is lowered to 50-100cm above the top steel bar ground, pass the support rod through the left formwork, pile foundation steel cage and right formwork in sequence, and use the support rod to temporarily support the pile foundation steel cage.

[0086] Lift the steel frame and weld the lower end of the steel frame and the upper end of the pile foundation steel cage. After welding, lift the pile foundation steel cage and the steel frame as a whole to a certain height to facilitate the removal of the support rods.

[0087] Remove the support rods from the formwork assembly, and then lower the pile foundation reinforcement cage and reinforcement skeleton as a whole;

[0088] When the embedded steel plate in the steel frame is lowered to the designed position, the support rod is passed through the left formwork, the steel frame and the right formwork in sequence, and the positioning groove on the support rod is aligned with the fixed steel plate in the steel frame;

[0089] Lower the steel bar skeleton until the fixed steel plate falls into the positioning groove.

[0090] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Within the spirit and principle of the present application, any modification, equivalent replacement, improvement, etc. made shall be included in the protection scope of the present application.

Claims

1. A device for accurately positioning the contact network foundation of a railway subgrade, characterized in that: include: Formwork components, support rods, elevation adjustment components; among which, The elevation adjustment component is arranged on the outside of the template component and is used to adjust the elevation and levelness of the template component; The template assembly comprises a front template, a rear template, a left template and a right template, wherein the front template, the rear template, the left template and the right template are connected end to end to form a casting area; The left template and the right template are perpendicular to the extension direction of the railway, the support rod is parallel to the extension direction of the railway, and the support rod is provided in two pieces and detachably passes through the upper ends of the left template and the right template; The upper end surface of the portion of the support rod located in the casting area is provided with a positioning groove, the size of which matches the size of the fixed steel plate in the steel frame, and is used to position and fix the steel plate; The upper end surfaces of the front template and the rear template are flush with the upper surface of the embedded steel plate in the steel bar skeleton; The vertical height difference between the lower end surface of the positioning groove and the upper end surface of the front template is equal to the vertical height difference between the lower end surface of the fixed steel plate in the steel frame and the upper end surface of the embedded steel plate; The upper ends of the left template and the right template are provided with mounting grooves, and the support rods pass through the mounting grooves.

2. The device for accurate positioning of the railway subgrade contact network foundation according to claim 1, characterized in that: The elevation adjustment components are arranged in four pieces and are arranged at the four corners of the template component.

3. The device for accurate positioning of railway subgrade contact network foundation according to claim 2, characterized in that: The elevation adjustment assembly includes a positioning steel plate and an adjusting bolt, and the positioning steel plate is arranged at the four corners of the template assembly; The lower end of the adjusting bolt is fixedly connected to the mounting base, and two adjusting nuts are arranged on the upper end of the adjusting bolt. An adjusting nut extends from the upper end of the adjusting bolt and passes through the positioning steel plate and is threadedly connected with the other adjusting nut. The positioning steel plate is fixed between the two adjusting nuts.

4. The device for accurate positioning of the railway subgrade contact network foundation according to claim 3 is characterized in that: Two of the positioning steel plates are arranged at the front end of the front template, and the other two positioning steel plates are respectively arranged at the rear end of the left template and the rear end of the right template.

5. The device for accurate positioning of railway subgrade contact network foundation according to claim 4, characterized in that: The distance between the outer sides of the two support rods is equal to the distance between the inner sides of the two rows of anchor bolts in the steel bar skeleton.

6. A railway subgrade contact network foundation construction component, characterized in that: include: Pile foundation, pile cap, steel bar skeleton and the device for accurate positioning of railway subgrade contact network foundation as claimed in any one of claims 1 to 5; The pile cap is opened at the upper end of the pile foundation, and the diameter of the pile cap is larger than the diameter of the pile foundation; The template assembly is fixed in the pile cap, the lower end of the steel frame passes through the pile cap and the pile foundation in sequence, and the upper end extends out of the pile cap; the portion of the steel frame extending out of the pile foundation is provided with embedded steel plates and fixed steel plates in sequence from bottom to top; The embedded steel plate is connected to the fixed steel plate through two rows of anchor bolts. The upper ends of the anchor bolts extend out of the fixed steel plate, and the fixed steel plate is embedded in the positioning groove on the support rod.

7. A method for accurately positioning a railway subgrade contact network foundation, characterized in that: Using the device for accurate positioning of the railway subgrade contact network foundation as described in any one of claims 1 to 5, and the following steps: Excavate the pile foundation, and after completion, excavate a rectangular cross-section pile cap on top of the pile foundation; After the formwork assembly is installed in the pile cap and the pouring area is formed; The elevation adjustment component adjusts the elevation and levelness of the formwork component and fixes the formwork component so that the positioning groove is located at the elevation position of the fixed steel plate after the support rod is installed on the formwork component; At the same time, the steel frame, embedded steel plate and anchor bolts are welded in the factory according to the design requirements. After welding, the nuts are fixed on the embedded steel plate and tightened. Then the fixed steel plate is installed through the anchor bolts. The fixed steel plate is located above the embedded steel plate. Use a crane to lower the pile foundation steel cage. When the pile foundation steel cage is lowered to 50-100cm above the top steel bar ground, pass the support rod through the left formwork, pile foundation steel cage and right formwork in sequence, and use the support rod to temporarily support the pile foundation steel cage. Lift the steel frame and weld the lower end of the steel frame and the upper end of the pile foundation steel cage. After welding, hoist the pile foundation steel cage and the steel frame as a whole to a certain height; Remove the support rods from the formwork assembly, and then lower the pile foundation reinforcement cage and reinforcement skeleton as a whole; When the embedded steel plate in the steel frame is lowered to the designed position, the support rod is passed through the left formwork, the steel frame and the right formwork in sequence, and the positioning groove on the support rod is aligned with the fixed steel plate in the steel frame; Lower the steel bar skeleton until the fixed steel plate falls into the positioning groove.

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