High-speed railway bridge support padstone formwork demoulded by compressed air and construction method

Abstract

The invention discloses a high-speed railway bridge support padstone formwork demoulded by compressed air and a construction method, and belongs to the technical field of high-speed railway bridge support padstone formworks. The fixing unit is connected with the padstone template so as to divide the interior of the padstone template into a plurality of fixing areas; the plurality of preformed hole positioning frames are arranged in one-to-one correspondence with the plurality of fixing areas, and are connected with the padstone template; the multiple preformed hole molds correspond to the multiple preformed hole positioning frames in a one-to-one mode and are connected with the preformed hole positioning frames; and an air pump is connected into the air hole of the preformed hole mold, and compressed air is pumped into the air hole of the preformed hole mold, so that the preformed hole mold is separated from the concrete in the padstone template. When the strength of the concrete reaches a certain degree, a compressed air demolding mode is used, and the problems of reserved hole deviation, hole deformation and hole wall damage caused by too early demolding time are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of high-speed railway bridge support pedestal stone templates, and specifically relates to a high-speed railway bridge support pedestal stone template using compressed air demoulding and a construction method. Background Art

[0002] With the development of my country's economy, high-speed railways have been continuously put into operation with their characteristics of fast, efficient, safe and comfortable. High-speed railway bridge bearings are an important component responsible for transferring loads and reducing shock, and the bearing pad stone is the key to ensuring its normal operation. The high-speed railway bridge bearing pad stone is the connecting part of the piers, abutments and beam bottom bearings. Most of them are cast on-site concrete. Before pouring, holes should be reserved in advance at the anchor bolt positions of the bridge bearings. The quality of the holes is the key to ensuring the connection between the bridge bearings and the bearing pad stones. Therefore, the quality of the holes is an important component to ensure the connection of the bridge. However, there are still some problems with the templates used in the construction process of the bridge bearing pad stones:

[0003] After sorting out, the main shortcomings are as follows:

[0004] 1. Concrete needs to be vibrated during pouring. The traditional fixing method will cause the position of the reserved hole to shift due to vibration during vibrating, and it is not easy to find;

[0005] 2. The demoulding of the reserved hole mold is mostly carried out when the concrete is initially set. If the demoulding time is too early, the hole will be offset, the hole will be deformed and the hole wall will be damaged. If the demoulding time is too late, the mold will be bonded to the concrete and cannot be demoulded. The demoulding can only be carried out by destroying the mold, which makes the reuse efficiency of the traditional mold unable to be guaranteed;

[0006] When the above-mentioned defects occur, the bearing cushion stones can only be chiseled out and re-poured according to the requirements of the high-speed railway quality acceptance specifications, resulting in serious waste of resources. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a high-speed railway bridge support cushion stone template and a construction method using compressed air demoulding, and adopts the following technical solutions:

[0008] A high-speed railway bridge support pad stone template using compressed air demoulding, comprising:

[0009] Pad stone formwork;

[0010] A fixing unit, the fixing unit being connected to the shim template to divide the interior of the shim template into a plurality of fixing areas;

[0011] A plurality of reserved hole positioning frames, wherein the plurality of reserved hole positioning frames are arranged in one-to-one correspondence with the plurality of fixed areas and connected to the pad stone template;

[0012] A plurality of pre-reserved hole molds are provided in one-to-one correspondence with the plurality of pre-reserved hole positioning frames and are connected to the pre-reserved hole positioning frames; a plurality of air holes are longitudinally arranged in the pre-reserved hole mold, and an air pump is used to connect to the air holes of the pre-reserved hole mold during demoulding, and compressed air is pumped into the air holes of the pre-reserved hole mold to achieve compressed air demoulding.

[0013] Further, the fixing unit includes a plurality of fixing plates and a plurality of fixing brackets; the plurality of fixing plates are arranged on the top of the shim template and connected to the shim template to divide the top of the shim template into a plurality of fixing areas;

[0014] The plurality of fixing brackets are arranged in one-to-one correspondence with the plurality of fixing areas, and are connected to the fixing plate and / or the pad stone template to separate the fixing area into a plurality of sub-areas;

[0015] The plurality of reserved hole positioning frames are arranged in one-to-one correspondence with the plurality of sub-areas and are connected to the fixing bracket.

[0016] Further, the fixing bracket includes a first fixing bracket and a second fixing bracket; the first fixing bracket and the second fixing bracket are connected to form a cross-shaped structure to divide the fixing area into four sub-areas; both ends of the first fixing bracket are respectively connected to the pad stone template; one end of the second fixing bracket is connected to the fixing plate, and the other end is connected to the pad stone template;

[0017] One side wall of the reserved hole positioning frame is connected to the first fixing bracket, and the other side wall is connected to the second fixing bracket; wherein the two side walls are arranged adjacent to each other.

[0018] Furthermore, the first fixing bracket and the second fixing bracket are an integrated structure; scale lines are provided on the first fixing bracket and the second fixing bracket to determine the fixing position of the reserved hole positioning frame.

[0019] Furthermore, four of the reserved hole positioning frames are arranged in each of the fixed areas; the four reserved hole positioning frames are arranged in four sub-areas in a one-to-one correspondence, and are sequentially connected with the first fixed bracket and the second fixed bracket to form an annular structure.

[0020] Furthermore, the reserved hole positioning frame is a circular structure; a first connecting plate is connected to the first side wall of the reserved hole positioning frame; a second connecting plate is connected to the second side wall of the reserved hole positioning frame; wherein the first side wall and the second side wall are arranged adjacent to each other.

[0021] The first connecting plate and the second connecting plate in the four reserved hole positioning frames are connected to the first fixing bracket and the second fixing bracket in sequence, so that the four reserved hole positioning frames form a ring structure.

[0022] Furthermore, one end of the reserved hole mold is clamped in the reserved hole positioning frame, and the other end extends toward the bottom of the pad stone template.

[0023] Furthermore, the reserved hole mold is cylindrical.

[0024] Furthermore, a construction method of a high-speed railway bridge support pedestal formwork using compressed air demoulding is provided, characterized in that the construction method of a high-speed railway bridge support pedestal formwork using compressed air demoulding provided in any of the above items comprises the following steps:

[0025] S1. Using the high-speed railway bridge support stone template, first measure and lay out to mark the support stone points, use the inner mold of the stone template to assemble and reinforce it vertically with the support stone points, and after the reinforcement of the stone template, install the fixing plate and the fixing bracket with scale lines in sequence. After the installation is completed, mark the position on the fixing bracket with scale lines according to the design;

[0026] S2. Install a separate reserved hole positioning frame, and install multiple reserved hole positioning frames one by one in multiple sub-areas. During installation and positioning, double check with the design dimensions, and fix after the verification is correct;

[0027] S3. After the reserved hole positioning frame is fixed, the reserved hole mold using compressed air demoulding is installed. Before installing the reserved hole mold, the air holes at the bottom are blocked with paper, and the mold release agent is evenly applied on the outer wall of the reserved hole mold. After completion, the reserved hole positioning frame is embedded;

[0028] S4, repeat the operation of step S3, repeatedly install each reserved hole mold, so that multiple reserved hole molds are installed in multiple reserved hole positioning frames in a one-to-one correspondence;

[0029] S5. After installation, check the reserved hole positions of the reserved hole mold and the reinforcement bolts of the pad stone template to prepare for concrete pouring: After completing the above steps, concrete pouring can be carried out. After the concrete reaches a certain strength, the reserved hole mold using compressed air can be demoulded; when demoulding, use an air pump to connect to the top of the reserved hole mold, and inject compressed air into the air holes on the top of the reserved hole mold. Under the action of pressure, the reserved hole mold is separated from the concrete in the pad stone template, and the concrete is pore-formed.

[0030] Beneficial effects:

[0031] (1) The present invention provides a high-speed railway bridge support pad stone template that uses compressed air demolding. By adding a fixed bracket with a scale and a separate reserved hole positioning bracket on the template, the efficiency of locating the position of the reserved hole is improved, and the risk of the hole being misaligned during concrete vibration is avoided. The purpose of quickly checking and correcting the hole position when the hole is misaligned can be achieved.

[0032] (2) The present invention provides a high-speed railway bridge support pedestal template that uses compressed air for demolding. It uses a separate reserved hole positioning frame to fix the template, which solves the problem that the traditional reserved holes are not firmly fixed and cannot be reused. It effectively solves the fixing problem and ensures the finished product quality and reuse of the pedestal reserved holes.

[0033] (3) The present invention provides a construction method for a high-speed railway bridge support cushion stone formwork using compressed air demoulding. By using compressed air demoulding after the concrete strength reaches a certain level, the problem of premature demoulding causing the reserved holes to be misaligned, the holes to be deformed, and the hole walls to be damaged is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the high-speed railway bridge support cushion stone template using compressed air demoulding of the present invention;

[0035] Figure 2 This is a layout diagram of anchor bolt holes for the pier stone support of the high-speed railway bridge support cushion stone template using compressed air demoulding of the present invention;

[0036] Figure 3 This is a schematic diagram of the fixed support structure of the high-speed railway bridge support cushion stone template using compressed air demoulding of the present invention;

[0037] Figure 4 It is a structural schematic diagram of a pre-reserved hole positioning frame of a high-speed railway bridge support cushion stone template using compressed air demoulding according to the present invention;

[0038] Figure 5 It is a schematic diagram of the connection structure of the reserved hole mold and the reserved hole positioning frame of the high-speed railway bridge support cushion stone template using compressed air demoulding of the present invention;

[0039] Figure 6 This is a schematic diagram of the structure of the high-speed railway bridge support pad stone template in step S1 in Example 2;

[0040] Figure 7 This is a schematic diagram of the structure of the high-speed railway bridge support cushion stone template in step S2 in Example 2;

[0041] Figure 8 This is a schematic diagram of the structure of the high-speed railway bridge support cushion stone template in step S3 in Example 2;

[0042] Fig. 9 This is a schematic diagram of the structure of the high-speed railway bridge support cushion stone template in step S4 in Example 2;

[0043] Among them, 1. Pad stone template; 2. Reserved hole mold; 3. Reserved hole positioning frame; 4. Fixed plate; 5. Fixed bracket; 6. Support pad stone point; 7. Scale line; 8. First connecting plate; 9. Second connecting plate; 10. First fixed bracket; 11. Second fixed bracket. DETAILED DESCRIPTION

[0044] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below.

[0045] Example 1

[0046] Reference Figures 1 to 5 , a high-speed railway bridge support pad stone template using compressed air demoulding, comprising:

[0047] Pad stone template 1;

[0048] A fixing unit, the fixing unit is connected to the shim template 1 to divide the interior of the shim template 1 into a plurality of fixing areas;

[0049] A plurality of pre-reserved hole positioning frames 3, the plurality of pre-reserved hole positioning frames 3 are arranged in one-to-one correspondence with the plurality of fixed areas, and are connected to the pad stone template 1;

[0050] A plurality of pre-reserved hole molds 2 are arranged in one-to-one correspondence with a plurality of pre-reserved hole positioning frames 3 and are connected to the pre-reserved hole positioning frames 3; a plurality of air holes are longitudinally arranged in the pre-reserved hole mold 2, and an air pump is used to connect to the air holes of the pre-reserved hole mold 2 during demoulding, and compressed air is injected into the air holes of the pre-reserved hole mold 2 to achieve compressed air demoulding.

[0051] In this embodiment, the fixing unit includes a plurality of fixing plates 4 and a plurality of fixing brackets 5; the plurality of fixing plates 4 are arranged on the top of the shim template 1 and connected to the shim template 1 to divide the top of the shim template 1 into a plurality of fixing areas;

[0052] A plurality of fixing brackets 5 are arranged corresponding to the plurality of fixing areas one by one, and are connected to the fixing plate 4 and / or the pad stone template 1 to separate the fixing area into a plurality of sub-areas;

[0053] Among them, the anchor bolt hole layout diagram of the pier stone support determines the fixing area; Figure 2 As shown, two fixing areas are provided on a high-speed railway bridge support pad stone template.

[0054] The plurality of reserved hole positioning frames 3 are arranged in one-to-one correspondence with the plurality of sub-areas and are connected to the fixing bracket 5 .

[0055] In this embodiment, the fixing bracket 5 includes a first fixing bracket 10 and a second fixing bracket 11; the first fixing bracket 10 and the second fixing bracket 11 are connected to form a cross-shaped structure to divide the fixing area into four sub-areas; both ends of the first fixing bracket 10 are respectively connected to the pad stone template 1; one end of the second fixing bracket 11 is connected to the fixing plate 4, and the other end is connected to the pad stone template 1;

[0056] One side wall of the reserved hole positioning frame 3 is connected to the first fixing bracket 10, and the other side wall is connected to the second fixing bracket 11; wherein the two side walls are arranged adjacent to each other.

[0057] like Figure 2 As shown, two fixing areas are arranged on a high-speed railway bridge support pad stone template, and each fixing area is divided into four sub-areas by a first fixing bracket 10 and a second fixing bracket 11.

[0058] In this embodiment, the first fixing bracket 10 and the second fixing bracket 11 are an integrated structure; scale lines 7 are provided on the first fixing bracket 10 and the second fixing bracket 11 to determine the fixing position of the reserved hole positioning bracket 3.

[0059] In this embodiment, four reserved hole positioning frames 3 are arranged in each fixing area; the four reserved hole positioning frames 3 are arranged in four sub-areas one by one, and are sequentially connected with the first fixing bracket 10 and the second fixing bracket 11 to form an annular structure.

[0060] In this embodiment, the reserved hole positioning frame 3 is a circular structure; a first connecting plate 8 is connected to the first side wall of the reserved hole positioning frame 3; a second connecting plate 9 is connected to the second side wall of the reserved hole positioning frame 3; wherein the first side wall and the second side wall are arranged adjacent to each other.

[0061] The first connecting plate 8 and the second connecting plate 9 in the four reserved hole positioning frames 3 are connected to the first fixing bracket 10 and the second fixing bracket 11 in sequence, so that the four reserved hole positioning frames 3 form an annular structure.

[0062] Among them, one end of the first connecting plate 8 is connected to the first fixed bracket 10 or the second fixed bracket 11, and the other end is connected to the first side wall; the second connecting plate 9 is connected to the second side wall of the reserved hole positioning frame 3; one end of the second connecting plate 9 is connected to the first fixed bracket 10 or the second fixed bracket 11, and the other end is connected to the second side wall; so that the four reserved hole positioning frames 3 form a ring structure on the first fixed bracket 10 and the second fixed bracket 11.

[0063] Among them, preferably, the pad stone template 1, the separate reserved hole positioning frame 3, the fixing plate 4, and the fixing bracket 5 are all made of aluminum templates. Compared with traditional templates, aluminum has the characteristics of light weight, high strength, and not easy to rust.

[0064] Through the above technical solution, the reserved hole position can be positioned quickly and accurately through the separate reserved hole positioning frame 3 and the fixed bracket 5 with scale lines, and whether the position is offset can be checked during the process. Secondly, bolts are used for fixing, which can be reused and avoids material waste compared with the traditional fixing mode.

[0065] In this embodiment, one end of the reserved hole mold 2 is clamped in the reserved hole positioning frame 3, and the other end extends to the bottom of the pad stone template 1.

[0066] In this embodiment, the reserved hole mold 2 is cylindrical.

[0067] Through the above technical scheme, the reserved hole mold 2 with compressed air demoulding is used. The demoulding time of the mold is after the concrete reaches a certain strength. The use of air demoulding can ensure the integrity of the reserved hole to the greatest extent without damaging the hole wall. Secondly, the use of air demoulding has the characteristics of fast speed, simple and quick use.

[0068] Example 2

[0069] A construction method for a high-speed railway bridge support pedestal template using compressed air demoulding, using a construction method for a high-speed railway bridge support pedestal template using compressed air demoulding provided in Example 1, the construction method comprising the following steps:

[0070] S1. Using the high-speed railway bridge support stone template 1, first measure and lay out to mark the support stone point 6, use the inner mold of the stone template 1 to assemble and reinforce it vertically with the support stone point 6, and after the reinforcement of the stone template 1, install the fixing plate 4 and the fixing bracket 5 with scale lines 7 in sequence, and after the installation is completed, mark the position on the fixing bracket 5 with scale lines 7 according to the design;

[0071] S2, installing a separate reserved hole positioning frame 3, installing multiple reserved hole positioning frames 3 one by one in multiple sub-areas, performing a secondary review with the design dimensions during installation and positioning, and fixing after the review is correct;

[0072] S3, after the reserved hole positioning frame 3 is fixed, the reserved hole mold 2 is installed using compressed air demoulding, the air holes at the bottom are blocked with paper before installing the reserved hole mold 2, and the mold release agent is evenly applied on the outer wall of the reserved hole mold 2, and the reserved hole positioning frame 3 is embedded after completion;

[0073] S4, repeat the operation of S3, repeatedly install each reserved hole mold 2, so that multiple reserved hole molds 2 are installed in multiple reserved hole positioning frames 3 in a one-to-one correspondence;

[0074] S5. After installation, check the reserved hole positions of the reserved hole mold and the reinforcement bolts of the pad stone template to prepare for concrete pouring: After completing the above steps, concrete pouring can be carried out. After the concrete reaches a certain strength, the reserved hole mold 2 using compressed air for demoulding can be demoulded; when demoulding, use an air pump to access the top of the reserved hole mold 2, and inject compressed air into the air holes on the top of the reserved hole mold 2. Under the action of pressure, the reserved hole mold 2 is separated from the concrete in the pad stone template 1, and the concrete is pore-formed.

[0075] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A high-speed railway bridge support pad stone template using compressed air demoulding, characterized in that: include: Pad stone formwork; A fixing unit, the fixing unit being connected to the shim template to divide the interior of the shim template into a plurality of fixing areas; A plurality of reserved hole positioning frames, wherein the plurality of reserved hole positioning frames are arranged in one-to-one correspondence with the plurality of fixed areas and connected to the pad stone template; A plurality of pre-reserved hole molds are arranged in one-to-one correspondence with the plurality of pre-reserved hole positioning frames and are connected to the pre-reserved hole positioning frames; a plurality of air holes are longitudinally arranged in the pre-reserved hole mold, and an air pump is used to connect to the air holes of the pre-reserved hole mold during demoulding, and compressed air is pumped into the air holes of the pre-reserved hole mold to separate the pre-reserved hole mold from the concrete in the pad stone template, thereby realizing compressed air demoulding.

2. The high-speed railway bridge support pedestal stone template using compressed air demoulding according to claim 1 is characterized in that: The fixing unit includes a plurality of fixing plates and a plurality of fixing brackets; the plurality of fixing plates are arranged on the top of the shim template and connected to the shim template to divide the top of the shim template into a plurality of fixing areas; The plurality of fixing brackets are arranged in one-to-one correspondence with the plurality of fixing areas, and are connected to the fixing plate and / or the pad stone template to separate the fixing area into a plurality of sub-areas; The plurality of reserved hole positioning frames are arranged in one-to-one correspondence with the plurality of sub-areas and are connected to the fixing bracket.

3. The high-speed railway bridge support pedestal stone template using compressed air demoulding according to claim 2 is characterized in that: The fixing bracket comprises a first fixing bracket and a second fixing bracket; the first fixing bracket and the second fixing bracket are connected to form a cross-shaped structure to divide the fixing area into four sub-areas; both ends of the first fixing bracket are respectively connected to the pad stone template; one end of the second fixing bracket is connected to the fixing plate, and the other end is connected to the pad stone template; One side wall of the reserved hole positioning frame is connected to the first fixing bracket, and the other side wall is connected to the second fixing bracket; wherein the two side walls are arranged adjacent to each other.

4. The high-speed railway bridge support pedestal stone template using compressed air demoulding according to claim 3 is characterized in that: The first fixing bracket and the second fixing bracket are an integrated structure; scale lines are arranged on the first fixing bracket and the second fixing bracket to determine the fixing position of the reserved hole positioning frame.

5. The high-speed railway bridge support pedestal stone template using compressed air demoulding according to claim 3 is characterized in that: Four reserved hole positioning frames are arranged in each of the fixing areas; the four reserved hole positioning frames are arranged in four sub-areas in a one-to-one correspondence, and are sequentially connected with the first fixing bracket and the second fixing bracket to form an annular structure.

6. The high-speed railway bridge support pedestal stone template using compressed air demoulding according to claim 5 is characterized in that: The reserved hole positioning frame is a circular structure; a first connecting plate is connected to the first side wall of the reserved hole positioning frame; a second connecting plate is connected to the second side wall of the reserved hole positioning frame; wherein the first side wall and the second side wall are arranged adjacent to each other; The first connecting plate and the second connecting plate in the four reserved hole positioning frames are connected to the first fixing bracket and the second fixing bracket in sequence, so that the four reserved hole positioning frames form a ring structure.

7. The high-speed railway bridge support pedestal stone template using compressed air demoulding according to claim 5 is characterized in that: One end of the reserved hole mold is clamped in the reserved hole positioning frame, and the other end extends toward the bottom of the pad stone template.

8. The high-speed railway bridge support pedestal stone template using compressed air demoulding according to claim 7 is characterized in that: The reserved hole mold is cylindrical.

9. A construction method for a high-speed railway bridge support cushion stone formwork using compressed air demoulding, characterized in that: A construction method for a high-speed railway bridge support pad stone formwork using compressed air demoulding provided in any one of claims 1 to 8, the method comprising the following steps: S1. Using the high-speed railway bridge support stone template, first measure and lay out to mark the support stone points, use the inner mold of the stone template to assemble and reinforce it vertically with the support stone points, and after the reinforcement of the stone template, install the fixing plate and the fixing bracket with scale lines in sequence. After the installation is completed, mark the position on the fixing bracket with scale lines according to the design; S2. Install a separate reserved hole positioning frame, and install multiple reserved hole positioning frames one by one in multiple sub-areas. During installation and positioning, double check with the design dimensions, and fix after the verification is correct; S3. After the reserved hole positioning frame is fixed, the reserved hole mold using compressed air demoulding is installed. Before installing the reserved hole mold, the air holes at the bottom are blocked with paper, and the mold release agent is evenly applied on the outer wall of the reserved hole mold. After completion, the reserved hole positioning frame is embedded; S4, repeat the operation of step S3, repeatedly install each reserved hole mold, so that multiple reserved hole molds are installed in multiple reserved hole positioning frames in a one-to-one correspondence; S5. After installation, check the reserved hole positions of the reserved hole mold and the reinforcement bolts of the pad stone template to prepare for concrete pouring: After completing the above steps, concrete pouring can be carried out. After the concrete reaches a certain strength, the reserved hole mold using compressed air can be demoulded; when demoulding, use an air pump to connect to the top of the reserved hole mold, and inject compressed air into the air holes on the top of the reserved hole mold. Under the action of pressure, the reserved hole mold is separated from the concrete in the pad stone template, and the concrete is pore-formed.

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