Template device for pouring drainage box culvert and construction method of drainage box culvert

Abstract

The invention discloses a formwork device for pouring a drainage box culvert and a construction method of the drainage box culvert. The formwork device comprises a box culvert bottom plate, a steel rail, an inner formwork trolley assembly, a top plate independent supporting assembly and an outer formwork assembly. The inner formwork trolley assembly comprises a trolley frame, an inner formwork steel formwork and an adjusting connecting rod. The trolley frame is in sliding connection with the steel rail; the inner mold steel template comprises a first bending part and a second bending part which are rotationally connected; the first bending part is fixed on the trolley frame, and the second bending part is connected with the side wall of the trolley frame; the number of the inner formwork trolley assemblies is two. A gap is formed between the two first bending parts; the top plate independent supporting assembly comprises a top plate body and a jacking supporting piece. The top plate body is arranged in the gap. By means of the arrangement, the municipal road drainage box culvert construction progress can be effectively accelerated, the construction quality is improved, large equipment input and use are reduced, construction potential safety hazards are reduced, environmental protection is achieved, and meanwhile input can be reduced.

Description

Technical Field

[0001] The invention belongs to the field of casting, and relates to a box culvert construction technology, in particular to a template device for casting a drainage box culvert and a construction method of the drainage box culvert. Background Art

[0002] With the development of society and the continuous advancement of urbanization, the demand for urban infrastructure construction is increasing. Municipal drainage projects, as important urban infrastructure, are an important part of urban public works and the lifeblood of the city. They are of great significance in urban operations. At the same time, the construction progress and quality of municipal drainage projects are closely related to the construction and development of the city.

[0003] The road drainage system of municipal engineering projects is mostly designed as a drainage box culvert with a small span of the top plate and an ultra-long continuity. The projects generally have the characteristics of tight construction period, limited construction site and complex construction environment. The construction process of using traditional wooden formwork and combined formwork is cumbersome, requires a large amount of machinery and manual coordination, is time-consuming and energy-consuming, is greatly restricted by the construction site, has a high quality defect rate of the finished product, and has a high construction safety risk, which is relatively environmentally unfriendly.

[0004] Therefore, a formwork device for casting a drainage box culvert and a construction method for the drainage box culvert are needed to solve the above problems. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a template device for pouring a drainage box culvert and a construction method for a drainage box culvert, so as to effectively speed up the construction progress of the municipal road drainage box culvert, improve the construction quality, reduce the use of large equipment, reduce the potential safety hazards of construction and protect the environment, and reduce investment, thereby saving construction costs. The present invention sets an inner template trolley assembly, a top plate independent support assembly and an outer template assembly, and the inner template trolley assembly, the outer template assembly and the top plate independent support assembly can surround the pouring chamber for pouring the box culvert wall panel and the box culvert top plate, and when the pouring is completed, the top plate body in the top plate independent support assembly can be used to lift and support the box culvert top plate, so as to facilitate the rapid separation between the inner template trolley assembly and the outer template assembly and the box culvert, so as to achieve the purpose of convenient demoulding. In addition, under the support of the top plate body, the concrete strength requirement can be effectively reduced when demoulding, which not only reduces the input and use of the template, but also speeds up the construction progress, so the template utilization rate can be effectively improved. In addition, since the inner formwork trolley assembly can be moved along the direction of the steel track after assembly, that is, when the box culvert segment is completed, it can be quickly demolded and moved to the next segment for construction, achieving the goals of convenient operation, high degree of mechanization, simple process, short time and low labor consumption.

[0006] To achieve the above-mentioned object, a first aspect of the present invention provides a formwork device for pouring a drainage box culvert, comprising a box culvert bottom plate, a steel track arranged on the box culvert bottom plate, an inner formwork trolley assembly, a top plate independent support assembly and an outer formwork assembly;

[0007] The inner template trolley assembly includes a trolley frame that can be telescopic in the vertical direction, an inner template steel template, and an adjustable connecting rod;

[0008] The trolley frame is slidably connected to the steel track;

[0009] The inner mold steel template includes a first bending portion and a second bending portion that are rotatably connected;

[0010] The first bending portion is fixed on the trolley frame, and the second bending portion is connected to the side wall of the trolley frame through the adjusting connecting rod, so that the second bending portion can be closely attached to or separated from the side wall of the culvert bottom plate;

[0011] The inner template trolley assembly is provided in two groups and is symmetrically arranged on the bottom plate of the box culvert, and the two inner template trolley assemblies are detachably connected through a connecting piece;

[0012] A gap is formed between the two first bending portions;

[0013] The top plate independent support assembly includes a top plate body and a lifting support member for lifting the top plate body;

[0014] The top plate body is arranged in the gap and overlapped on the two trolley frames to form a U-shaped inner mold structure together with the inner mold steel template;

[0015] The outer formwork assembly includes outer steel formworks and adjustable support cross bars arranged on both sides of the box culvert bottom plate;

[0016] A casting chamber for forming a box culvert top plate and a box culvert wall plate is formed between the two outer steel formworks, the inner formwork structure and the box culvert bottom plate;

[0017] The adjustable support cross bar is arranged between the two outer steel templates, and is used to control the outer steel template to be in close contact with or separated from the side wall of the box culvert bottom plate;

[0018] A plurality of groups of detachable water-stopping screws are arranged between the outer mold steel template and the second bending portion.

[0019] Furthermore, a roller that moves on the steel track is provided at the bottom of the trolley frame, and the roller is driven by a travel motor.

[0020] Furthermore, the trolley frame is built with an adjustable top screw for driving the first bending portion to separate from the top plate of the box culvert.

[0021] Furthermore, pulley support rails are provided on both sides of the end wall of the box culvert bottom plate;

[0022] The two pulley support rails are used to support the second bending portion and the outer mold steel template respectively.

[0023] Further, the connecting member includes two hinged screws and a threaded sleeve;

[0024] The two hinge screws are respectively arranged on the sides of the two trolley frames close to each other, and the outer walls are provided with symmetrical and opposite threads;

[0025] The threaded sleeve is threadably connected to the two hinge screws and can be separated from one of the hinge screws to form a space for installing the jacking support.

[0026] Furthermore, an adjustment support rod is provided on the side of the two trolley frames that are away from each other;

[0027] One end of the adjusting support rod is hinged to the outer wall of the trolley frame, and the other end can be extended to abut against or separate from the surface of the bottom plate of the box culvert and remain self-locking.

[0028] Furthermore, the outer steel formwork is hinged to the end of the adjustable support crossbar.

[0029] Furthermore, the lifting support comprises a vertical rod, an adjusting rod, a nut and a V-shaped supporting plate;

[0030] A steel pad is provided at the bottom of the vertical pole for abutting against the bottom plate of the box culvert;

[0031] The adjusting rod is threadedly mounted on the end of the vertical rod;

[0032] The V-shaped support plate is rotatably mounted on the adjusting rod through a nut, and the end of the V-shaped support plate is flush with the end of the adjusting rod to support the top plate body.

[0033] Furthermore, the lifting support members are arranged in multiple groups along the moving direction of the trolley frame, and two adjacent vertical poles are fixedly connected by a fixing rod.

[0034] On the other hand, the present invention further proposes a construction method for a drainage box culvert, which uses the template device for casting the drainage box culvert described in the above embodiment, and specifically includes the following steps:

[0035] Step 1: Cast and form the box culvert bottom plate, and set steel tracks on the box culvert bottom plate;

[0036] Step 2: assemble the trolley frame, the inner mold steel template, the adjustment connecting rod and the top plate body to form the inner mold structure;

[0037] Step 3: Make and install the steel bars of the box culvert top plate and the box culvert wall plate, and hoist the outer formwork assembly on the outside of the box culvert bottom plate, and fix the outer formwork steel formwork and the inner formwork steel formwork through the water stop screw, so that the outer formwork steel formwork, the inner membrane structure and the box culvert bottom plate are surrounded to form a casting chamber, and then complete the casting of the box culvert top plate and the box culvert wall plate of this section;

[0038] Step 4: When the strength of the box culvert top plate and the box culvert wall plate reaches the specified range, cut off the water stop screw, and control the adjustment connecting rod, the adjustable support cross bar and the trolley frame to adjust the outer steel formwork and the inner steel formwork to separate the box culvert top plate and the box culvert wall plate, and assemble the jacking support at the same time, so that the top plate body always supports the box culvert top plate;

[0039] Step 5: The trolley frame and the outer formwork assembly are pulled along the length direction of the steel track to move the outer formwork assembly, the trolley frame, the inner formwork steel formwork and the adjusting connecting rod to the next construction section of the box culvert, and the top plate body is reinstalled and step 3 is repeated;

[0040] Step 6. Repeat steps 4 and 5 until all box culvert sections are completed.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] By arranging the inner formwork trolley assembly, the top plate independent support assembly and the outer formwork assembly, a casting chamber for casting the box culvert wall panel and the box culvert top plate can be formed around the inner formwork trolley assembly, the outer formwork assembly and the top plate independent support assembly, and when the casting is completed and the formwork is removed, the box culvert top plate can be lifted and supported by the top plate body in the top plate independent support assembly, thereby facilitating the rapid separation of the inner formwork trolley assembly, the outer formwork assembly and the box culvert, thereby achieving the purpose of convenient demoulding.

[0043] Moreover, with the support of the top plate body, the concrete strength requirements when removing the formwork can be effectively reduced. This not only reduces the amount of formwork used, but also speeds up the construction progress, thus effectively improving the utilization rate of the formwork.

[0044] In addition, since the inner formwork trolley assembly can be moved along the direction of the steel track after assembly, that is, when the box culvert segment is completed, it can be quickly demolded and moved to the next segment for construction, achieving the goals of convenient operation, high degree of mechanization, simple process, short time and low labor consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 It is a structural schematic diagram of a template device for pouring a drainage box culvert in one embodiment of the present invention;

[0047] Figure 2 It is a structural schematic diagram of a trolley frame of a formwork device for pouring a drainage box culvert in one embodiment of the present invention when it moves;

[0048] Figure 3 It is a structural schematic diagram of a jacking support member of a formwork device for pouring a drainage box culvert in one embodiment of the present invention;

[0049] Figure 4 The present invention is a flowchart of a box culvert construction method in another embodiment of the present invention.

[0050] Figure Number:

[0051] 1. Box culvert bottom plate; 11. Steel rail; 2. Formwork trolley assembly; 21. Trolley frame; 211. Travel motor; 212. Adjusting top screw; 22. Inner mold steel formwork; 221. First bending part; 222. Second bending part; 23. Adjusting connecting rod; 3. Top plate independent support assembly; 31. Top plate body; 32. Lifting support; 321. Vertical pole; 322. Adjusting rod; 323. Nut; 324. V-shaped support plate; 4. Outer formwork assembly; 41. Outer mold steel formwork; 42. Adjustable supporting cross bar; 5. Connecting piece; 51. Articulated screw; 52. Threaded sleeve; 6. Water-stop screw; 7. Pulley support rail; 8. Adjusting support rod; 9. Steel pad; 10. Fixing rod. DETAILED DESCRIPTION

[0052] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] Embodiment 1

[0054] See also Figures 1 to 3A first embodiment of the present invention provides a formwork device for casting a drainage box culvert, including a box culvert bottom plate 1, a steel track 11 arranged on the box culvert bottom plate 1, an inner formwork trolley assembly 2, a top plate independent support assembly 3 and an outer formwork assembly 4.

[0055] The inner template trolley assembly 2 includes a trolley frame 21 that can be telescopic in the vertical direction, an inner template steel template 22 and an adjusting connecting rod 23.

[0056] The trolley frame 21 is slidably connected to the steel rail 11 and is used to move to the next construction section after demoulding, so as to facilitate the reuse of the template and rapid construction.

[0057] The inner mold steel template 22 includes a first bending portion 221 and a second bending portion 222 which are rotatably connected.

[0058] The first bending portion 221 is fixed on the trolley frame 21 and is used as a supporting template for the top plate of the box culvert.

[0059] The second bending portion 222 is connected to the side wall of the trolley frame 21 through the adjusting connecting rod 23 and is used as a supporting template for the box culvert wall panel.

[0060] Among them, adjusting the connecting rod 23 can make the second bent portion 222 close to or separate from the side wall of the box culvert bottom plate 1. That is, when pouring is required, the second bent portion 222 can be rotated to be close to the side wall of the box culvert bottom plate 1 to serve as a supporting template to complete the pouring function; and when demoulding is to be moved to the next construction section for application, the second bent portion 222 is controlled by adjusting the connecting rod 23 to deflect in the direction away from the box culvert relative to the first bent portion 221 to complete demoulding, thereby achieving rapid separation between the inner template trolley assembly 2 and the box culvert.

[0061] It should be noted that, in the present embodiment, two groups of the inner template trolley assemblies 2 are provided and symmetrically arranged on the box culvert bottom plate 1 , and the two inner template trolley assemblies 2 are detachably connected via a connector 5 .

[0062] A gap is formed between the two first bending portions 221 for installing the top plate independent support assembly 3 .

[0063] Specifically, the top plate independent support assembly 3 includes a top plate body 31 and a lifting support member 32 for lifting the top plate body 31 .

[0064] The top plate body 31 is arranged in the gap and overlapped on the two trolley frames 21 to enclose with the inner mold steel template 22 to form a U-shaped inner mold structure. That is, when it is necessary to cast the box culvert wall panel and the box culvert top plate, the top plate body 31 is first overlapped on the two trolley frames 21, and the two sides of the top plate body 31 are tightly attached to the ends of the two first bending parts 221 to ensure the casting effect; and when demolding is required, the connecting piece 5 between the two trolley frames 21 is disconnected, and the jacking support 32 is installed. Through the jacking of the jacking support 32, the top plate body 31 supports the inner cavity top wall of the box culvert structure. Through the continuous support of the top plate body 31, the strength requirement of the concrete during demolding can be effectively reduced, that is, the concrete strength requirement during demolding can be reduced from the design value of 75% to the design value of 50%, so as to reduce the time required for concrete curing, thereby improving the construction rate.

[0065] In this embodiment, the outer formwork assembly 4 includes outer formwork steel formworks 41 and adjustable support cross bars 42 arranged on both sides of the box culvert bottom plate 1 .

[0066] The two outer steel formworks 41 , the inner formwork structure and the culvert bottom plate 1 surround and form a casting chamber for the culvert top plate and the culvert wall plate.

[0067] In addition, the adjustable support cross bar 42 is arranged between the two outer form steel templates 41, and is used to control the outer form steel template 41 to be tightly attached to or separated from the side wall of the box culvert bottom plate 1, so that the outer form steel template 41 can also be quickly separated from the box culvert structure through the adjustable support cross bar 42, which is convenient for transfer to the next box culvert section for construction.

[0068] It should be particularly noted that a plurality of sets of detachable water-stop screws 6 are arranged between the outer steel formwork 41 and the second bending portion 222, and the water-stop screws 6 are used for connection and support to ensure that the casting chamber of the box culvert wall panel formed between the outer steel formwork 41 and the second bending portion 222 will not be deformed during the casting process, thereby improving the molding quality of the box culvert.

[0069] The device is provided with an inner formwork trolley assembly 2, a top plate independent support assembly 3 and an outer formwork assembly 4, and a casting chamber for casting the box culvert wall panel and the box culvert top plate (i.e., a chamber formed between two inner form steel formworks 22, a top plate body 31, an outer form steel formwork 41 and the box culvert bottom plate 1) can be formed around the inner formwork trolley assembly 2, the outer formwork assembly 4 and the top plate independent support assembly 3, and when the casting is completed and the mold is removed, the box culvert top plate can be lifted and supported with the help of the top plate body 31 in the top plate independent support assembly 3, thereby facilitating the rapid separation of the inner formwork trolley assembly 2, the outer formwork assembly 4 and the box culvert, thereby achieving the purpose of convenient demoulding.

[0070] Furthermore, with the support of the top plate body 31, the concrete strength requirement when removing the formwork can be effectively reduced, which not only reduces the amount of formwork used, but also speeds up the construction progress, thus effectively improving the formwork utilization rate.

[0071] In addition, since the inner template trolley assembly 2 can be moved along the steel track 11 after assembly, that is, when the box culvert segment is completed, it can be quickly demolded and moved to the next segment for construction, achieving the purposes of convenient operation, high degree of mechanization, simple process, short time consumption and low labor consumption.

[0072] In this embodiment, the movement mode of the trolley frame 21 is further limited. Specifically, rollers that move on the steel rail 11 are provided at the bottom of the trolley frame 21, and the rollers are driven by a travel motor 211, which can further improve the degree of mechanization. No manual traction or pushing is required, and it is convenient to quickly move to the next section of the box culvert for construction.

[0073] In addition, the trolley frame 21 is built with an adjusting top screw 212, which is used to drive the first bent portion 221 to separate from the box culvert top plate, that is, by rotating the adjusting top screw 212, the console frame 21 is controlled to shrink in the vertical direction, thereby correspondingly pulling the first bent portion 221 to separate from the formed box culvert top plate, thereby achieving the purpose of rapid demoulding, and at the same time, the top plate body 31 completes the reliable support of the box culvert under the action of the jacking support 32, so that the trolley frame 21 can be demoulded before the demoulding strength requirement of the box culvert is met, so as to save the time required for waiting for the maintenance of the box culvert and improve the construction speed.

[0074] In other embodiments, in order to improve the molding effect of the box culvert and facilitate the rapid movement of the outer template assembly 4 during the subsequent demoulding process, a pulley support guide rail 7 is additionally provided on the box culvert bottom plate 1.

[0075] Specifically, pulley support guide rails 7 are provided on both sides of the end walls of the box culvert bottom plate 1 .

[0076] The two pulley support rails 7 are used to support the second bending portion 222 and the outer mold steel template 41 respectively.

[0077] Correspondingly, when the outer formwork steel formwork 41 in the outer formwork assembly 4 is separated from the side wall of the box culvert bottom plate 1 and moves along the length direction of the steel track 11, the pulley support guide rail 7 can support the outer formwork steel formwork 41 while converting the friction force generated during its movement into rolling friction, thereby increasing its movement rate and achieving the purpose of facilitating the operator to quickly push the outer formwork steel formwork 41 to the next section for construction.

[0078] like Figure 2As shown, in other embodiments, a specific connecting member 5 is also proposed to maintain the stability between the two inner template trolley assemblies 2 and facilitate quick disassembly to facilitate the installation of the jacking support member 32.

[0079] Specifically, the connecting member 5 includes two hinged screws 51 and a threaded sleeve 52 .

[0080] The two articulated screws 51 are respectively arranged on one side of the two trolley frames 21 which are close to each other, and the outer walls are provided with symmetrical and opposite threads.

[0081] The threaded sleeve 52 is threadedly connected to the two articulated screws 51, and can be separated from one of the articulated screws 51 to form a space for installing the lifting support 32. That is, when the threaded sleeve 52 rotates in one direction, it can be separated from one of the articulated screws 51, so that the connecting member 5 is disconnected, ensuring that there is no interference with the installation and operation of the lifting support 32.

[0082] In other embodiments, in order to further improve the casting and forming effect of the box culvert, that is, to prevent the trolley frame 21 from shaking during the casting process, thereby causing the inner mold steel template 22 to be dislocated due to the movement of the trolley frame 21, resulting in poor casting effect, the trolley frame 21 is further limited here.

[0083] Specifically, an adjustment support rod 8 is provided on the side of the two trolley frames 21 that are away from each other.

[0084] Among them, one end of the adjusting support rod 8 is hinged to the outer wall of the trolley frame 21, and the other end can be extended to abut or separate from the surface of the box culvert bottom plate 1 and remain self-locking. By adjusting the abutment support between the support rod 8 and the box culvert bottom plate 1 and the coordinated application of the water stop screw 6, it is ensured that the casting chamber will not be deformed or cause the trolley frame 21 to move during the casting process due to the influence of the concrete casting power, thereby improving the casting quality of the box culvert.

[0085] In a further embodiment, in order to ensure that the outer steel template 41 will not scratch the box culvert wall panel when the adjustable support cross bar 42 is adjusted, the connection method between the two is further limited. Specifically, the outer steel template 41 is hinged to the end of the adjustable support cross bar 42, so when the adjustable support cross bar 42 is adjusted, the outer steel template 41 can be gradually deflected from top to bottom, and because the bottom end of the outer steel template 41 is connected to the outer wall of the box culvert bottom plate 1, it will not cause large scratches between the box culvert wall panel, ensuring the molding quality.

[0086] In other embodiments, a specific lifting support member 32 is also provided to enhance the supporting effect on the box culvert.

[0087] Specifically, the lifting support member 32 includes a vertical rod 321 , an adjusting rod 322 , a nut 323 and a V-shaped support plate 324 .

[0088] Wherein, a steel pad 9 is provided at the bottom of the vertical pole 321 for abutting against the bottom plate 1 of the box culvert.

[0089] In addition, the adjusting rod 322 is threadedly mounted on the end of the vertical rod 321, and is moved and fed in the vertical direction relative to the vertical rod 321 by means of rotation, so as to realize the telescopic function.

[0090] In addition, the V-shaped support plate 324 is rotatably mounted on the adjusting rod 322 via a nut 323, and its end is flush with the end of the adjusting rod 322 to support the top plate body 31, that is, the V-shaped support plate 324 and the end of the adjusting rod 322 lift the top plate body 31 together, so that the top plate body 31 is subjected to more uniform force, thereby improving the supporting effect.

[0091] In this embodiment, the jacking support members 32 are provided in multiple groups along the moving direction of the trolley frame 21, and two adjacent vertical poles 321 are fixedly connected by a fixing rod 10. The number of jacking support members 32 is related to the length of the single-segment box culvert structure. In this embodiment, four groups of jacking support members 32 are provided, and the spacing between two adjacent jacking support members 32 is 60 cm, so as to meet the application requirements of a single-segment box culvert structure with a length of 2.4m-2.8m.

[0092] Embodiment 2

[0093] like Figure 4 As shown, this embodiment further proposes a drainage box culvert construction method based on the first embodiment, so as to effectively speed up the construction progress of the municipal road drainage box culvert, improve the construction quality, reduce the use of large equipment, reduce construction safety hazards, and protect the environment while reducing investment, thereby saving construction costs.

[0094] Specifically, the construction method of the drainage box culvert adopts the template device for casting the drainage box culvert described in the first embodiment, and specifically includes the following steps:

[0095] Step 1: Cast and form a box culvert bottom plate 1, and set a steel track 11 on the box culvert bottom plate 1;

[0096] Step 2: assemble the trolley frame 21, the inner mold steel template 22, the adjustment connecting rod 23 and the top plate body 31 to form an inner mold structure;

[0097] Step 3: Make and install the steel bars of the box culvert top plate and the box culvert wall plate, and hoist the outer formwork assembly 4 on the outside of the box culvert bottom plate 1, and fix the outer formwork steel formwork 41 and the inner formwork steel formwork 22 by the water stop screw 6, so that the outer formwork steel formwork 41, the inner membrane structure and the box culvert bottom plate 1 are surrounded to form a casting chamber, and then the casting of the box culvert top plate and the box culvert wall plate of the section is completed;

[0098] Step 4: When the strength of the box culvert top plate and the box culvert wall plate reaches the specified range, the water stop screw 6 is cut off, and the connecting rod 23, the adjustable support cross bar 42 and the trolley frame 21 are controlled and adjusted to separate the outer steel template 41 and the inner steel template 22 from the box culvert top plate and the box culvert wall plate, and at the same time, the jacking support 32 is assembled so that the top plate body 31 always supports the box culvert top plate;

[0099] Step 5: The trolley frame 21 and the outer formwork assembly 4 are pulled to move along the length direction of the steel track 11, so that the outer formwork assembly 4, the trolley frame 21, the inner steel formwork 22 and the adjusting connecting rod 23 are moved to the next construction section of the box culvert, and the top plate body 31 is reinstalled and step 3 is repeated;

[0100] Step 6. Repeat steps 4 and 5 until all box culvert sections are completed.

[0101] Among them, in step one, the casting and forming of the box culvert bottom plate 1 can be completed by using a method in the prior art to form a box culvert bottom plate 1 cavity surrounded by multiple templates, and can also be completed by using other templates, which will not be limited in detail here.

[0102] Through the above steps, when it is necessary to cast the box culvert structure, the installation of the inner mold structure can be completed first by assembling the trolley frame 21, the inner mold steel formwork 22, the adjusting connecting rod 23 and the top plate body 31 in sequence, and then the installation of the outer formwork assembly 4 can be completed by hoisting, and the connection and locking of the outer formwork assembly 4 and the inner mold steel formwork 22 can be achieved through the water-stop screw 6, so as to form a casting chamber for the box culvert top plate and the box culvert wall panel; and when the box culvert structure is cast, it can be demoulded and supported by disconnecting the water-stop screw 6 and assembling the jacking support 32, and finally the trolley frame 21 and the outer formwork assembly 4 can be moved to the next section to quickly construct the box culvert structure of the next section. Therefore, in this process, it can effectively speed up the construction progress of the municipal road drainage box culvert, improve the construction quality, reduce the use of large-scale equipment, reduce construction safety hazards and environmental protection, and at the same time reduce investment, thereby saving construction costs.

[0103] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A formwork device for pouring drainage box culvert, characterized in that: It comprises a box culvert bottom plate (1), a steel track (11) arranged on the box culvert bottom plate (1), an inner template trolley assembly (2), a top plate independent support assembly (3) and an outer template assembly (4); The inner template trolley assembly (2) comprises a trolley frame (21) that can be telescopic in the vertical direction, an inner template steel template (22) and an adjustable connecting rod (23); The trolley frame (21) is slidably connected to the steel track (11); The inner mold steel template (22) comprises a first bending portion (221) and a second bending portion (222) which are rotatably connected; The first bent portion (221) is fixed on the trolley frame (21), and the second bent portion (222) is connected to the side wall of the trolley frame (21) via the adjusting connecting rod (23), so that the second bent portion (222) can be closely attached to or separated from the side wall of the box culvert bottom plate (1); The inner template trolley assemblies (2) are provided in two groups and are symmetrically arranged on the box culvert bottom plate (1), and the two inner template trolley assemblies (2) are detachably connected via a connecting piece (5); A gap is formed between the two first bent portions (221); The top plate independent support assembly (3) comprises a top plate body (31) and a lifting support member (32) for lifting the top plate body (31); The top plate body (31) is arranged in the gap and overlapped on the two trolley frames (21) to form a U-shaped inner mold structure together with the inner mold steel template (22); The outer formwork assembly (4) comprises outer steel formworks (41) and adjustable support cross bars (42) arranged on both sides of the box culvert bottom plate (1); A casting chamber for a box culvert top plate and a box culvert wall plate is formed between the two outer steel formworks (41), the inner formwork structure and the box culvert bottom plate (1); The adjustable support cross bar (42) is arranged between the two outer steel formworks (41) and is used to control the outer steel formworks (41) to be closely attached to or separated from the side wall of the box culvert bottom plate (1); A plurality of groups of detachable water-stopping screws (6) are arranged between the outer steel template (41) and the second bending portion (222).

2. The formwork device for pouring drainage box culvert according to claim 1 is characterized in that: The bottom of the trolley frame (21) is provided with a roller that moves on the steel track (11), and the roller is driven by a travel motor (211).

3. The formwork device for pouring drainage box culvert according to claim 1 is characterized in that: The trolley frame (21) is internally provided with an adjusting top screw (212) for driving the first bending portion (221) to separate from the top plate of the box culvert.

4. The formwork device for pouring drainage box culvert according to claim 1, characterized in that: Pulley support guide rails (7) are provided on both sides of the end wall of the box culvert bottom plate (1); The two pulley support rails (7) are used to support the second bending portion (222) and the outer mold steel template (41) respectively.

5. The formwork device for pouring drainage box culvert according to claim 1, characterized in that: The connecting member (5) comprises two hinged screws (51) and a threaded sleeve (52); The two hinge screws (51) are respectively arranged on the sides of the two trolley frames (21) close to each other, and the outer walls are provided with symmetrical and opposite threads; The threaded sleeve (52) is threadedly connected to the two hinge screws (51) and can be separated from one of the hinge screws (51) to form a space for installing the lifting support member (32).

6. The formwork device for pouring drainage box culvert according to claim 1, characterized in that: An adjustment support rod (8) is provided on one side of the two trolley frames (21) that is away from each other; One end of the adjustment support rod (8) is hinged to the outer wall of the trolley frame (21), and the other end can be extended to abut against or separate from the surface of the culvert bottom plate (1) and remain self-locking.

7. The formwork device for pouring drainage box culvert according to claim 1, characterized in that: The outer steel template (41) is hinged to the end of the adjustable support crossbar (42).

8. The formwork device for pouring drainage box culvert according to claim 1, characterized in that: The lifting support member (32) comprises a vertical rod (321), an adjusting rod (322), a nut (323) and a V-shaped support plate (324); A steel pad (9) is provided at the bottom of the vertical pole (321) for contacting with the bottom plate (1) of the box culvert; The adjusting rod (322) is threadedly mounted on the end of the vertical rod (321); The V-shaped support plate (324) is rotatably mounted on the adjustment rod (322) via a nut (323), and an end portion thereof is flush with an end portion of the adjustment rod (322) to support the top plate body (31).

9. The formwork device for pouring drainage box culvert according to claim 8, characterized in that: The lifting support members (32) are arranged in multiple groups along the moving direction of the trolley frame (21), and two adjacent vertical poles (321) are fixedly connected via a fixing rod (10).

10. A method for constructing a drainage box culvert, characterized in that: The formwork device for casting a drainage box culvert according to any one of claims 1 to 9 specifically comprises the following steps: Step 1: Casting a box culvert bottom plate (1), and setting a steel track (11) on the box culvert bottom plate (1); Step 2: assemble the trolley frame (21), the inner mold steel template (22), the adjustment connecting rod (23) and the top plate body (31) to form an inner mold structure; Step 3: Make and install the steel bars of the box culvert top plate and the box culvert wall plate, and hoist the outer formwork assembly (4) on the outer side of the box culvert bottom plate (1), and fix the outer formwork steel formwork (41) and the inner formwork steel formwork (22) by means of the water stop screw (6), so that the outer formwork steel formwork (41), the inner membrane structure and the box culvert bottom plate (1) are surrounded to form a casting chamber, and then the casting of the box culvert top plate and the box culvert wall plate of the section is completed; Step 4: When the strength of the box culvert top plate and the box culvert wall plate reaches the specified range, the water stop screw (6) is cut off, and the control and adjustment connecting rod (23), the adjustable support cross bar (42) and the trolley frame (21) are adjusted to separate the outer mold steel template (41) and the inner mold steel template (22) from the box culvert top plate and the box culvert wall plate, and at the same time, the jacking support (32) is assembled so that the top plate body (31) always supports the box culvert top plate; Step 5: The trolley frame (21) and the outer formwork assembly (4) are pulled along the length direction of the steel track (11), so that the outer formwork assembly (4), the trolley frame (21), the inner steel formwork (22) and the adjusting connecting rod (23) are moved to the next construction section of the box culvert, and the top plate body (31) is reinstalled and step 3 is repeated; Step 6. Repeat steps 4 and 5 until all box culvert sections are completed.

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