Construction method of railway overhead platform

Abstract

The invention relates to a construction method of a railway overhead platform. The construction method comprises the following steps that S1, trolleys are installed and built, specifically, a first trolley is installed outside a first overhead channel, a second trolley is installed in the first overhead channel, a third trolley is installed in a second overhead channel, and a fourth trolley is installed in a third overhead channel; s2, the building trolley is moved in place, specifically, the building trolley is moved to the to-be-constructed position, and a formwork is erected; s3, auxiliary formworks are installed, specifically, formworks corresponding to platform columns are installed, and formworks corresponding to node positions are constructed; s4, binding reinforcing steel bars; s5, pouring and curing; and S6, the building trolleys are transferred, specifically, when the concrete strength reaches 75%, the auxiliary formworks are dismantled to enable all the trolleys to be subjected to formwork withdrawing, and the building trolleys are moved to the next construction section. According to the invention, the automation degree can be improved, the control difficulty of construction quality is reduced, the material transfer difficulty is reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of elevated platform construction, and particularly to a construction method for a railway elevated platform. Background Art

[0002] Currently, in the structure of railway platforms such as high-speed rail platforms, elevated platforms are usually adopted. Due to the structural characteristics of the elevated platform, an elevated passage supported by walls or columns is usually provided at the bottom of the elevated platform, and the elevated passage has characteristics such as a long and narrow space and a low height.

[0003] In the construction of elevated platforms, the traditional full hall formwork support with wooden formwork is still used. Due to the long and narrow space inside the elevated platform, the transfer of formwork supports and wooden formwork mainly relies on manual transfer, resulting in difficult turnover and low construction efficiency; the splicing of formwork mainly relies on manual work, which consumes a large amount of labor, and the quality and technical capabilities of workers vary, resulting in great difficulty in quality control.

[0004] Therefore, it is necessary to provide a new method for constructing railway elevated platforms to reduce the workload of workers, improve the degree of automation, and solve problems such as difficult manual construction, difficult material transfer, and great difficulty in quality control. Summary of the Invention

[0005] Based on this, it is necessary to provide a construction method for a railway elevated platform, and its specific technical solution is as follows.

[0006] A construction method for a railway elevated platform, characterized in that the elevated platform includes a first elevated passage, a second elevated passage, and a third elevated passage; the construction method includes the following steps: S1. Install construction trolleys: Install a first trolley outside the first elevated passage, install a second trolley inside the first elevated passage, install a third trolley inside the second elevated passage, and install a fourth trolley inside the third elevated passage; S2. Move the construction trolleys into position: Move the construction trolleys to the position to be constructed and formwork; S3. Install auxiliary formwork: Install the formwork corresponding to the platform columns and the formwork corresponding to the structural joint positions; S4. Tie steel bars; S5. Pour and cure; S6. Transfer the construction trolleys: When the concrete strength reaches 75%, remove the auxiliary formwork to demold each trolley, and move the construction trolleys to the next construction section.

[0007] Further, on both sides of the first elevated passage are platform walls; on one side of the second elevated passage is a platform wall, and on the other side is a platform column; on both sides of the third elevated passage are platform columns; The first trolley, the second trolley and the third trolley all comprise a side mold retracting mechanism, a template folding mechanism and a trolley bracket; the fourth trolley comprises a template folding mechanism and a trolley bracket; The side formwork retraction mechanism includes a formwork for supporting the platform wall and the top formwork; the formwork folding mechanism includes a corner formwork for supporting the inner corner.

[0008] Furthermore, the process of installing and building the trolley in step S1 includes: Installing tracks on concrete raft; The trolley brackets of each trolley are respectively installed above the track, and a walking system for driving the trolley bracket to move along the track is provided between the trolley bracket and the track; Install the side mold retracting mechanism or the template folding mechanism.

[0009] Furthermore, the side formwork retraction mechanism includes a side formwork, a plurality of connecting rods and a first cylinder; one end of the connecting rod is hinged to the trolley bracket, and the other end is hinged to the side formwork; the plurality of connecting rods are arranged along the vertical direction of the overhead platform, and the plurality of connecting rods are parallel to each other; one end of the first cylinder is hinged to the trolley bracket, and the other end is hinged to the side formwork, the first cylinder is arranged at an angle and the hinge point of the first cylinder and the trolley bracket is higher than the hinge point of the first cylinder and the side formwork.

[0010] Furthermore, the template folding mechanism includes a top template, a corner template, a lift and a second cylinder; the corner template is hinged to the edge of the top template; the lift is connected between the top template and the trolley bracket, and is used to drive the top template to rise and fall; one end of the second cylinder is hinged to the corner template, and the other end is hinged to the top template; the side of the corner template away from the top template is provided with an oblique opening for abutting against the top of the side template when supporting the template.

[0011] Furthermore, the top of the side formwork is flat; a connecting plate is provided on the inner side of the side formwork, and a clamping bolt is provided on the connecting plate. When the oblique opening of the corner formwork abuts against the flat opening of the side formwork, the clamping bolt abuts against the oblique opening of the corner formwork.

[0012] Furthermore, in step S2, the formwork process includes: first, driving the top formwork upward into position by a lift; then driving the corner formwork to rotate into position by a second cylinder; and finally driving the side formwork diagonally downward into position by a first cylinder, and before and after the side formwork formwork is moved, the connecting rods are not removed and are kept parallel to each other.

[0013] Furthermore, after the formwork is completed, adjacent side formworks are connected by tension screws.

[0014] Beneficial effects: The construction method of the railway elevated platform provided by the present invention improves the automation degree of the elevated platform construction, can automatically turn, formwork, and remove formwork in the narrow elevated passage, greatly reduces the manual workload and operation difficulty, reduces human errors by reducing the manual workload, thereby reducing the control difficulty of the construction quality, reducing the material transfer difficulty, and improving the construction efficiency. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic flow chart of a construction method of a railway elevated platform; Figure 2 It is a schematic diagram of arranging the trolley; Figure 3 It is a schematic diagram after pouring the elevated platform; Figure 4 It is a schematic diagram of the elevated platform; Figure 5 It is a schematic diagram of the formwork state of the first trolley; Figure 6 It is a schematic diagram of the demoulding state of the first trolley; Figure 7 It is a schematic diagram of the formwork state of the second trolley; Figure 8 It is a schematic diagram of the demoulding state of the second trolley; Figure 9 It is a schematic diagram of the formwork state of the third trolley; Figure 10 It is a schematic diagram of the demoulding state of the third trolley; Figure 11 It is a schematic diagram of the formwork state of the fourth trolley; Figure 12 It is a schematic diagram of the demoulding state of the fourth trolley; Figure 13 For Figure 7 The enlarged schematic diagram of area A in

[0017] Description of the Reference Numerals: 100, elevated platform; 101, first elevated passage; 102, second elevated passage; 103, third elevated passage; 104, platform wall; 105, platform column; 106, concrete raft 1. The first vehicle; 2. The second vehicle; 3. The third vehicle; 4. The fourth vehicle; 5. The traveling system; 6. The track; 11. The side mold shrinking mechanism; 12. The template folding mechanism; 13. The vehicle support; 111. The side template; 112. The connecting rod; 113. The first oil cylinder; 114. The flat opening; 115. The connecting plate; 116. The fastening bolt; 121. The top template; 122. The corner template; 123. The elevator; 124. The second oil cylinder; 125. The bevel opening. Specific embodiments

[0018] To make the above objects, features, and advantages of the present application more apparent and understandable, the following describes the specific embodiments of the present application in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0019] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0020] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0021] In this application, unless otherwise clearly stipulated or defined, terms such as "install", "connect", "join", "fix", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] In this application, unless otherwise clearly stipulated or defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0024] Embodiment This embodiment provides a construction method for a railway elevated platform 100. The elevated platform 100 includes a first elevated passage 101, a second elevated passage 102 and a third elevated passage 103; this construction method refers to Figure 1 as shown, and includes the following steps: S1. Install and build a trolley: Install a first trolley 1 outside the first elevated passage 101, install a second trolley 2 inside the first elevated passage 101, install a third trolley 3 inside the second elevated passage 102, and install a fourth trolley 4 inside the third elevated passage 103; S2. Move the construction trolley into position: Move the construction trolley to the position to be constructed and formwork; S3. Install auxiliary formwork: Install the formwork corresponding to the platform column 105 and the formwork corresponding to the construction joint position; S4. Bind steel bars; S5. Pour and cure; S6. Transfer the construction trolley: When the concrete strength reaches 75%, remove the auxiliary formwork to demold each trolley, and move the construction trolley to the next construction segment.

[0025] A construction method for a railway elevated platform 100 provided in this embodiment improves the automation degree of the construction of the elevated platform 100, can automatically turnover, formwork, and demold in a narrow elevated passage, greatly reduces the manual workload and operation difficulty, reduces human errors by reducing the manual workload, thereby reducing the control difficulty of the construction quality, reducing the material transfer difficulty, and improving the construction efficiency.

[0026] Specifically, referring to Figure 4 As shown, on both sides of the first elevated passage 101 are platform walls 104; on one side of the second elevated passage 102 is a platform wall 104, and on the other side is a platform column 105; on both sides of the third elevated passage 103 are platform columns 105. It should be noted that in other embodiments, different numbers of elevated passages can also be selected according to construction requirements, and corresponding platform walls 104 or platform columns 105 are provided for each elevated passage.

[0027] Specifically, the first trolley 1, the second trolley 2, and the third trolley 3 all include a side formwork contraction mechanism 11, a formwork folding mechanism 12, and a trolley support 13; the fourth trolley 4 includes a formwork folding mechanism 12 and a trolley support 13. The side formwork contraction mechanism 11 includes a formwork for supporting the platform wall 104 and the top formwork 121; the formwork folding mechanism 12 includes a corner formwork 122 for supporting the internal corner. Each trolley selects the corresponding formwork folding mechanism 12 according to the setting of the platform wall 104.

[0028] Specifically, the first trolley 1 is located outside the first elevated passage 101 to support the outside, internal corner, and external corner parts of the platform wall 104 of the first elevated platform 100. The second trolley 2 is located inside the first elevated passage 101 to support the inner sides, top, and internal corner parts of the two platform walls 104 of the second elevated platform 100. The third trolley 3 is located inside the second elevated passage 102 to support the inner side of one platform wall 104 of the second elevated passage 102, as well as the top and two internal corner parts. The fourth trolley 4 is located inside the third elevated passage 103 to support the top and the crossbeam. The form shape of each trolley can be designed according to the position to be supported.

[0029] Specifically, the process of installing the construction trolley in step S1 includes: Install the track 6 on the concrete raft 106; Install the trolley supports 13 of each trolley above the track 6, and a walking system 5 for driving the trolley support 13 to move along the track 6 is provided between the trolley support 13 and the track 6; Install the side formwork contraction mechanism 11 or the formwork folding mechanism 12.

[0030] During the construction operations in different flow sections, the traveling system 5 drives the trolley support 13 to move, thereby driving each trolley to move. It should be noted that in this embodiment, each trolley can move independently or as a whole. In this embodiment, the traveling system 5 can be a chain type, a roller type or other forms of traveling structures.

[0031] Specifically, referring to Figures 5 - 13 As shown, the side formwork contraction mechanism 11 includes a side formwork 111, multiple connecting rods 112 and a first oil cylinder 113; one end of the connecting rod 112 is hinged to the trolley support 13, and the other end is hinged to the side formwork 111; the multiple connecting rods 112 are arranged along the vertical direction of the overhead platform 100, and the multiple connecting rods 112 are parallel to each other; one end of the first oil cylinder 113 is hinged to the trolley support 13, and the other end is hinged to the side formwork 111. The first oil cylinder 113 is arranged obliquely and makes the hinge point of the first oil cylinder 113 and the trolley support 13 higher than the hinge point of the first oil cylinder 113 and the side formwork 111. During the formwork erection and stripping processes, the multiple connecting rods 112 remain parallel and keep the side formwork 111 always parallel to the side of the trolley support 13. There is no need to disassemble and assemble the connecting rods 112 before and after formwork stripping and erection, reducing the construction volume of formwork stripping and erection and improving the construction efficiency. The first oil cylinder 113 is arranged obliquely, so that when stripping the formwork, the side formwork 111 moves obliquely upward towards the direction of approaching the trolley support 13. In this way, the side formwork 111 can be separated from the bottom surface and the side surface, and the requirement for the stripping space is small, which can better adapt to the narrow overhead passage.

[0032] Specifically, the formwork folding mechanism 12 includes a top formwork 121, a corner formwork 122, a lifter 123 and a second oil cylinder 124; the corner formwork 122 is hinged to the edge of the top formwork 121; the lifter 123 is connected between the top formwork 121 and the trolley support 13 and is used to drive the top formwork 121 to lift and lower; one end of the second oil cylinder 124 is hinged to the corner formwork 122, and the other end is hinged to the top formwork 121; on the side of the corner formwork 122 away from the top formwork 121, there is an inclined opening 125 for abutting against the top of the side formwork 111 during formwork erection.

[0033] During demoulding, the side mold moves obliquely upward to provide demoulding space for the corner mold 122, so that the corner mold 122 is turned toward the trolley support 13, and then the top mold and the corner mold 122 are driven downward by the elevator 123 to complete demoulding. The corner mold 122 is provided with an oblique opening 125 on the side away from the top mold 121 for contacting the top of the side mold 111 during mold support. By providing the oblique opening 125 on the corner mold 122, the side mold 111 can move smoothly when moving in an oblique upward direction to avoid interference with the corner mold 122.

[0034] Specifically, the top of the side formwork 111 is a flat opening 114; a connecting plate 115 is provided on the inner side of the side formwork 111, and a tightening bolt 116 is provided on the connecting plate 115. When the oblique opening 125 of the corner formwork 122 abuts against the flat opening 114 of the side formwork 111, the tightening bolt 116 abuts against the oblique opening 125 of the corner formwork 122. Since the oblique opening 125 of the corner formwork 122 is relatively weak, the oblique opening 125 is supported by the tightening bolt 116, thereby improving the stability and reliability between the corner formwork 122 and the side formwork 111.

[0035] Specifically, the process of supporting the formwork in step S2 includes: firstly, driving the top formwork 121 upward into position by means of the lift 123; then driving the corner formwork 122 to rotate into position by means of the second oil cylinder 124; finally, driving the side formwork to move diagonally downward into position by means of the first oil cylinder 113, and before and after the side formwork 111 is moved, the connecting rods 112 are not removed and are kept parallel to each other.

[0036] Specifically, after supporting the formwork, the side formworks 111 of two adjacent trolleys are connected by tensioning screws. The tensioning screws are used to ensure the stability of the side formworks 111 between different trolleys, avoiding problems such as slurry leakage and uneven casting surface caused by squeezing the side formworks 111 during pouring.

[0037] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A construction method for a railway overhead platform, characterized in that: The overhead platform includes a first overhead passage, a second overhead passage and a third overhead passage; the construction method includes the following steps: S1. Install the construction trolley: install the first trolley outside the first overhead channel, install the second trolley inside the first overhead channel, install the third trolley inside the second overhead channel, and install the fourth trolley inside the third overhead channel; S2. Move the construction trolley to its position: move the construction trolley to the location to be constructed and support the formwork; S3. Install auxiliary formwork: install the formwork corresponding to the platform column and the formwork corresponding to the construction node position; S4, tying steel bars; S5, pouring and curing; S6. Transfer the construction trolley: When the concrete strength reaches 75%, remove the auxiliary formwork to unmold each trolley and move the construction trolley to the next construction section.

2. A construction method for a railway overhead platform, characterized in that: The first overhead passage has platform walls on both sides; the second overhead passage has a platform wall on one side and a platform column on the other side; the third overhead passage has platform columns on both sides; The first trolley, the second trolley and the third trolley all comprise a side mold retracting mechanism, a template folding mechanism and a trolley bracket; the fourth trolley comprises a template folding mechanism and a trolley bracket; The side formwork retraction mechanism includes a formwork for supporting the platform wall and the top formwork; the formwork folding mechanism includes a corner formwork for supporting the inner corner.

3. A method for constructing a railway overhead platform according to claim 2, characterized in that: The process of installing and building the trolley in step S1 includes: Installing tracks on concrete raft; The trolley brackets of each trolley are respectively installed above the track, and a walking system for driving the trolley bracket to move along the track is provided between the trolley bracket and the track; Install the side mold retracting mechanism or the template folding mechanism.

4. The construction method of a railway overhead platform according to claim 3, characterized in that: The side formwork contraction mechanism includes a side formwork, multiple connecting rods and a first cylinder; one end of the connecting rod is hinged to the trolley bracket, and the other end is hinged to the side formwork; the multiple connecting rods are arranged along the vertical direction of the overhead platform, and the multiple connecting rods are parallel to each other; one end of the first cylinder is hinged to the trolley bracket, and the other end is hinged to the side formwork, the first cylinder is arranged at an angle and the hinge point of the first cylinder and the trolley bracket is higher than the hinge point of the first cylinder and the side formwork.

5. The construction method of a railway overhead platform according to claim 4, characterized in that: The template folding mechanism includes a top template, a corner template, a lifter and a second oil cylinder; the corner template is hinged to the edge of the top template; The elevator is connected between the top template and the trolley bracket, and is used to drive the top template to rise and fall; one end of the second oil cylinder is hinged to the corner template, and the other end is hinged to the top template; the side of the corner template away from the top template is provided with an oblique opening for abutting against the top of the side template when supporting the template.

6. The construction method of a railway overhead platform according to claim 5, characterized in that: The top of the side template is flat; a connecting plate is provided on the inner side of the side template, and a clamping bolt is provided on the connecting plate. When the oblique opening of the corner template abuts against the flat opening of the side template, the clamping bolt abuts against the oblique opening of the corner template.

7. The construction method of a railway overhead platform according to claim 6, characterized in that: The process of supporting the formwork in step S2 includes: firstly, driving the top formwork upward into position by means of a lift; then driving the corner formwork to rotate into position by means of a second oil cylinder; and finally driving the side formwork diagonally downward into position by means of a first oil cylinder, and before and after the side formwork is moved, the connecting rods are not removed and are kept parallel to each other.

8. The construction method of a railway overhead platform according to claim 4, characterized in that: When the formwork is completed, the adjacent side formworks are connected with tension screws.

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