Novel box culvert trolley and box culvert construction method

Abstract

The invention discloses a novel box culvert trolley and a box culvert construction method.The box culvert trolley comprises an inner formwork trolley, the inner formwork trolley comprises a first supporting frame, inner side formworks are arranged on the two sides of the first supporting frame, and an inner top formwork is arranged on the top of the first supporting frame; the outer formwork trolley comprises a second supporting frame, and wall body formworks are arranged on the two sides of the second supporting frame; the steel bar inner trolley comprises a fourth supporting frame, a top platform is arranged on the top of the fourth supporting frame, a second comb plate is arranged on the periphery of the top platform, and a positioning groove partially containing the steel bars is formed in the second comb plate; the steel bar outer trolley comprises a third supporting frame, and a first comb plate is arranged on the inner side of the third supporting frame. By using the inner and outer formwork trolleys, the process of erecting the support is reduced; by adding the steel bar trolley, the next section can be subjected to steel bar binding while the previous section of the box culvert is maintained, so that the procedure connection is more reasonable, the construction efficiency can be improved, and the construction period can be shortened.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a novel box culvert trolley and a box culvert construction method. Background Art

[0002] In civil engineering construction, box culvert construction has become the preferred solution for culvert construction with a span of less than 6 meters due to its unique advantages. This technology uses reinforced concrete box pipe segments to construct culverts, which is not only economical but also ensures that the structure has excellent bearing capacity. The box culvert structure usually includes a reinforced concrete culvert body, wing walls and a stable foundation. These components together give the box culvert excellent structural stability and durability, making it widely used in a variety of engineering environments.

[0003] However, in the actual construction process, box culvert construction still faces a series of technical challenges, especially in the construction of the box culvert top plate. Traditionally, the construction of the box culvert top plate relies on the erection of scaffolds to support the formwork. This process is not only time-consuming and labor-intensive, but also the erection and removal of the scaffolds increases the construction period. At the same time, the stability of the scaffolds may also affect the construction quality and safety, thereby reducing the overall construction efficiency.

[0004] In addition, after each section is completed, it is necessary to wait for the concrete to reach sufficient strength before removing the formwork and starting the next stage of construction. This waiting time not only interrupts the construction process and makes it impossible to achieve flow operation, but also further prolongs the construction period and increases the project cost. Summary of the invention

[0005] Therefore, in order to solve the technical problems of low construction efficiency and long construction period in the above-mentioned box culvert construction process, on the one hand, the present invention provides a new box culvert trolley, comprising: An inner mold trolley, which can move linearly along the extension direction of the box culvert foundation, and the inner mold trolley includes a first support frame, inner side molds are arranged on both sides of the first support frame, and an inner top mold is arranged on the top; An outer mold trolley, which is entirely wrapped around the outer side of the inner mold trolley, and can move linearly along the extension direction of the box culvert foundation, and the outer mold trolley includes a second support frame, and wall formworks are arranged on both sides of the second support frame; A steel bar inner trolley, which can move linearly along the extension direction of the box culvert foundation, and includes a fourth support frame, a top platform is provided on the top of the fourth support frame, a second comb plate is provided around the top platform, and a positioning groove for partially accommodating the steel bar is provided on the second comb plate; The outer steel bar trolley is entirely wrapped around the outer side of the inner steel bar trolley and can move linearly along the extension direction of the box culvert foundation. The outer steel bar trolley includes a third support frame, and a first comb plate is provided on the inner side of the third support frame.

[0006] The present invention uses internal and external formwork trolleys, and no scaffolding is required, thereby reducing the number of scaffolding process steps. By adding a steel bar trolley, the steel bars of the next section can be tied while the previous section of the box culvert is being maintained. This not only improves construction safety compared to traditional construction, but also makes process connection more reasonable, thereby improving construction efficiency and shortening construction period.

[0007] Furthermore, a first travel wheel assembly is provided at the bottom of the first support frame, and a first track is provided on the box culvert basis corresponding to the first travel wheel assembly; A second running wheel assembly is provided at the bottom of the second support frame, and a second track is provided on the box culvert basis corresponding to the second running wheel assembly, wherein the second track is parallel to the first track; A third running wheel assembly and a fourth running wheel assembly are provided at the bottom of the third supporting frame and the bottom of the fourth supporting frame in sequence, and the third running wheel assembly and the fourth running wheel assembly are in contact with the surface of the box culvert foundation.

[0008] By adding a walking wheel assembly, the trolley can be pushed or pulled by external force during the construction process, so that the trolley can be quickly moved to the preset construction position and the trolley can be dismantled during the movement, saving time and effort.

[0009] Furthermore, a transverse movement assembly is also provided at the bottom of the first support frame.

[0010] The traverse assembly allows the formwork trolley to be easily moved in the horizontal direction while maintaining stability and safety.

[0011] Furthermore, a screw assembly is provided between the first support frame and the inner template, and the inner template is driven to move by the screw assembly; The first support frame is also provided with a first lifting assembly, through which the inner top template is driven to rise and fall.

[0012] After the curing of the concrete of the current segment is completed, the lower screw assembly at both ends of the trolley is retracted by 100mm to separate the lower part of the inner molds on both sides from the concrete, and all the inner mold trolley lifting assemblies are retracted by 10mm. The upper screw assembly at both ends of the trolley is retracted by 50mm, and all the inner mold trolley lifting assemblies are retracted by 100mm. After all the inner molds and top molds are separated from the concrete, the inner mold trolley inner mold template and the inner top mold template are demolded to avoid damage to the concrete of the segment during the movement of the trolley, while reducing the walking resistance of the trolley.

[0013] Furthermore, the outer mold trolley also includes an outer mold adjustment structure, which drives the wall formwork to move.

[0014] The closing and withdrawing of the single-sided wall formwork is achieved by the external form adjustment mechanism cooperating with each other to perform telescopic movements.

[0015] Furthermore, a first operating platform is provided on the second supporting frame.

[0016] Furthermore, the fourth support frame is provided with a height adjustment device, and the top platform is driven to rise and fall by the height adjustment device.

[0017] The height of the top platform is adjusted by the height adjusting device, so as to adjust the height of the top platform according to the actual construction situation and improve the application range of the trolley. At the same time, after the steel bar binding is completed, the top platform is lowered by the height adjusting device to separate the comb plate from the steel bar to avoid the steel bar interfering with the movement of the trolley inside the steel bar.

[0018] Furthermore, the second comb plate is connected to the side of the top platform through a comb plate adjusting beam.

[0019] The width of the top platform can be adjusted through the comb plate adjustment beam to make adaptive adjustments according to the actual construction conditions and improve the applicability of the trolley.

[0020] Furthermore, a second operating platform is provided on the third support frame corresponding to the first comb plate.

[0021] By setting up a second operating platform, it is convenient to tie the vertical steel bars.

[0022] In another aspect, the present invention further provides a box culvert construction method, which uses the above-mentioned box culvert trolley, and the box culvert construction method comprises: Install the first track and the second track at the position of the first section to the second section of the box culvert foundation, and install the inner and outer mold trolleys at the first section of the foundation bottom plate; Tie the steel bars of the first section, close and adjust the mold with a manual mold removal device, and tighten the tension rods manually; Pour the first section concrete and start maintenance. During maintenance, install the inner and outer reinforcement trolleys at the second section, tie the reinforcement of the second section and fix the top plate reinforcement on the crossbeam of the outer reinforcement trolley; After the formwork of the first section concrete is removed, the inner steel bar trolley moves to the third section, the outer steel bar trolley continues to hold the top plate steel bars, the winch drags the inner formwork trolley along the track to the top plate steel bar position of the second section, the top plate steel bars are positioned with the inner formwork support, the outer steel bar trolley moves forward to the third section, and the above steps are repeated to complete the construction of concrete for subsequent sections.

[0023] The present invention has the following advantages: The present invention uses internal and external formwork trolleys, and no scaffolding is required, thereby reducing the number of scaffolding process steps. By adding a steel bar trolley, the steel bars of the next section can be tied while the previous section of the box culvert is being maintained. This not only improves construction safety compared to traditional construction, but also makes process connection more reasonable, thereby improving construction efficiency and shortening construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a box culvert trolley; Figure 2 yes Figure 1 The structural schematic diagram of the inner mold trolley in the box culvert trolley shown; Figure 3 yes Figure 2 A front schematic diagram of the inner mold trolley shown; Figure 4 yes Figure 3 An enlarged schematic diagram of a local structure A in the inner mold trolley is shown; Figure 5 yes Figure 1 The structural schematic diagram of the outer mold trolley in the box culvert trolley shown; Figure 6 yes Figure 5 An enlarged schematic diagram of a local structure B in the outer mold trolley shown; Figure 7 yes Figure 5 A front schematic diagram of the outer mold trolley shown; Figure 8 yes Figure 5 A side schematic diagram of the outer mold trolley shown; Fig. 9 yes Figure 1 The schematic diagram of the structure of the steel bar inner trolley in the box culvert trolley shown; Fig.10 yes Fig. 9 Front view of the trolley inside the steel bar Fig.11 yes Fig. 9 A side view of the trolley in the steel bar is shown; Fig.12 yes Figure 1 The structural schematic diagram of the outer steel bar trolley in the box culvert trolley shown; Fig.13 yes Fig.12 A front view of the steel bar outer trolley is shown; Fig.14 yes Fig.12 A side view of the steel bar outer trolley shown; Fig.15 It is a structural diagram of the comb plate; Fig.16 It is a structural schematic diagram of the comb plate adjusting beam; Fig.17 It is a schematic diagram of the wedge-shaped template being lifted up.

[0025] In the figure: 100, inner mold trolley; 110, inner top mold; 111, upper chamfering mold; 112, section top mold; 113, wedge top mold; 120, inner side mold; 130, lateral movement assembly; 140, first support frame; 141, first height extension piece; 142, first width extension piece; 143, first upper longitudinal beam; 144, first lower longitudinal beam; 145, distribution beam; 146, first main longitudinal beam; 150, first track; 160, screw assembly; 170, first walking wheel assembly; 200, outer mold trolley; 210, second support frame; 211, first top beam; 212, first column; 213, outer mold adjustment structure; 214, second main longitudinal beam; 215, cross connection; 216, lower platform; 217, end hanging beam; 220, wall formwork; 230, second track; 240, first operating platform; 250, second walking wheel assembly; 300, steel bar outer trolley; 310, second column; 320, top longitudinal beam; 330, second top cross beam; 340, second operating platform; 350, bottom cross beam; 360, first comb plate; 370, third walking wheel assembly; 380, ladder; 400, inner trolley for reinforcing bars; 410, fourth support frame; 411, second width extension piece; 412, height adjustment device; 413, second lower longitudinal beam; 414, second height extension piece; 415, second upper longitudinal beam; 416, third height extension piece; 420, top platform; 421, guardrail; 422, second comb plate; 422A, positioning groove; 422B, connecting hole; 423, comb plate adjusting beam; 423A, fixing hole; 430, fourth walking wheel assembly. DETAILED DESCRIPTION

[0026] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0027] In this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises", or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0028] As mentioned in the background technology, however, in the actual construction process, box culvert construction still faces a series of technical challenges, especially in the construction of the box culvert top plate. Traditionally, the construction of the box culvert top plate relies on the erection of scaffolds to support the formwork. This process is not only time-consuming and labor-intensive, but the erection and removal of the scaffolds increases the construction period. At the same time, the stability of the scaffolds may also affect the construction quality and safety, thereby reducing the overall construction efficiency.

[0029] Embodiment 1: Therefore, in order to solve the above technical problems existing in the prior art, this embodiment provides a new type of box culvert trolley, such as Figure 1 As shown, the box culvert trolley includes: The inner mold trolley 100 can move linearly along the extension direction of the box culvert foundation. Figure 2 As shown, the inner mold trolley includes a first support frame 140, inner mold plates 120 are provided on both sides of the first support frame 140, and an inner top mold plate 110 is provided on the top; The outer mold trolley 200 is entirely wrapped around the outer side of the inner mold trolley, and the outer mold trolley can move linearly along the extension direction of the box culvert foundation, such as Figure 5 As shown, the outer mold trolley includes a second support frame 210, and wall formworks 220 are provided on both sides of the second support frame; The steel bar inner trolley 400 can move linearly along the extension direction of the box culvert foundation. Fig. 9 As shown, the steel bar inner trolley includes a fourth support frame 410, and a top platform 420 is provided on the top of the fourth support frame 410. Fig.10 , 11 As shown, a second comb plate 422 is provided around the top platform. Fig.15 As shown, the second comb plate is provided with a positioning groove 422A for partially accommodating the steel bar; The steel bar outer trolley 300 is entirely wrapped around the outer side of the steel bar inner trolley and can move linearly along the extension direction of the box culvert foundation. The steel bar outer trolley includes a third support frame, and a first comb plate 360 ​​is provided on the inner side of the third support frame.

[0030] When this embodiment is in use, the inner and outer mold trolleys are installed at the first section position of the foundation bottom plate; the steel bars of the first section are tied, the mold is closed and adjusted with a manual mold removal device, and the tension rods are manually tightened, the concrete of the first section is poured and maintenance begins. While maintenance is in progress, the inner and outer steel bar trolleys are installed at the second section position, the steel bars of the second section are tied, and the top plate steel bars are fixed to the crossbeam of the outer steel bar trolley; after the concrete of the first section is demolded, the inner steel bar trolley is moved to the third section, the outer steel bar trolley continues to hold the top plate steel bars, the inner mold trolley is moved to the top plate steel bar position of the second section, the top plate steel bars are positioned with the inner mold support, the outer steel bar trolley is moved forward to the third section, and the above steps are repeated to complete the construction of concrete for subsequent sections.

[0031] This embodiment uses internal and external formwork trolleys, and no scaffolding is required, thereby reducing the number of scaffolding process steps. By adding a steel bar trolley, the steel bars of the next section can be tied while the previous section of the box culvert is being maintained. This not only improves construction safety compared to traditional construction, but also makes the process connection more reasonable, thereby improving construction efficiency and shortening construction period.

[0032] For example, Figure 2 , 3 As shown, a first travel wheel assembly 170 is provided at the bottom of the first support frame 140, and a first track 150 is provided on the box culvert corresponding to the first travel wheel assembly; like Figure 6 , 7 As shown, a second running wheel assembly 250 is provided at the bottom of the second support frame, and a second track 230 is provided on the culvert basis corresponding to the second running wheel assembly, and the second track is parallel to the first track; like Fig. 9 , 13 As shown, the third supporting frame and the fourth supporting frame are provided with a third running wheel assembly 370 and a fourth running wheel assembly 430 at the bottom, respectively, and the third running wheel assembly and the fourth running wheel assembly are in contact with the surface of the box culvert foundation.

[0033] The inner steel bar trolley can be pushed by manpower to move. When the inner steel bar trolley moves out of the second section, the inner mold trolley is driven forward along the track by a winch or other means. The first track can be composed of two sections, which can be split and moved forward in sections. After the inner mold trolley reaches the end of the first track, the first track of the next section is moved manually to the place where it needs to be moved forward, so that the trolley can move forward one section. The alternating movement method of the outer mold trolley and the outer steel bar trolley can also refer to the alternating movement method of the inner mold trolley and the inner steel bar trolley mentioned above.

[0034] By adding a walking wheel assembly, this embodiment can use external force to push or pull the trolley to move during the construction process, so that the trolley can be quickly moved to a preset construction position and the trolley can be dismantled during the movement, saving time and effort.

[0035] For example, Figure 2 As shown, a transverse movement assembly 130 is also provided at the bottom of the first support frame.

[0036] In this embodiment, the transverse movement assembly enables the box culvert trolley to move freely in the transverse direction, that is, in a direction perpendicular to the construction direction, so as to realize the pouring of the box culvert, the adjustment of the formwork, etc. In addition, through the transverse movement assembly, the construction personnel can accurately control the position of the box culvert trolley, thereby ensuring that the formwork can be accurately placed in the predetermined position.

[0037] For example, Figure 3 As shown, a screw assembly 160 is provided between the first support frame and the inner template, and the inner template is driven to move by the screw assembly; The first support frame is also provided with a first lifting assembly, through which the inner top template is driven to rise and fall.

[0038] In this embodiment, the screw assembly is respectively arranged on the first support frame and the upper layer. After the curing of the concrete of the current segment is completed, the lower screw assembly at both ends of the trolley is retracted by 100mm to separate the lower part of the inner molds on both sides from the concrete, and all the inner mold trolley lifting assemblies are retracted by 10mm. The upper screw assembly at both ends of the trolley is retracted by 50mm, and all the inner mold trolley lifting assemblies are retracted by 100mm. After all the inner molds and top molds are separated from the concrete, the inner side mold and the inner top mold of the inner mold trolley are demoulded to avoid damage to the concrete of the segment during the movement of the trolley, while reducing the walking resistance of the trolley.

[0039] In this embodiment, if Figure 3 , 4 As shown, the inner top mold may include an upper chamfering mold 111, a section top mold 112 and a wedge-shaped top mold 113 from both sides to the middle. Fig.17 As shown, the wedge-shaped top mold can be lifted up when the left and right inner molds shrink.

[0040] In addition, Figure 3As shown, the first support frame may also include a first lower longitudinal beam 144, the first lower longitudinal beam is provided with two groups, the two groups of the first lower longitudinal beams are relatively equipped, the first walking wheel assembly is installed at the bottom end of the first lower longitudinal beam, a first height extension piece 141 is provided at the top end of the first lower longitudinal beam, a first upper longitudinal beam 143 is provided at the end of the first height extension piece away from the first lower longitudinal beam, a first main longitudinal beam 146 is also provided at the top end of the first upper longitudinal beam, a distribution beam 145 is provided between adjacent first main longitudinal beams, a first width extension piece 142 is provided between adjacent first upper longitudinal beams and between adjacent first lower longitudinal beams, the first width extension piece arranged between adjacent first lower longitudinal beams cooperates with the transverse displacement structure, the above-mentioned first lifting assembly is installed on the first width extension piece arranged between adjacent first lower longitudinal beams, and the first lifting assembly is used to drive the lifting of the first support frame as a whole to realize the lifting of the inner top template.

[0041] In this embodiment, the first lifting assembly can be an oil cylinder, an air cylinder, an electric cylinder or other device or structure capable of driving the first support frame to move up and down. The screw assembly can be replaced by an oil cylinder, an air cylinder, an electric cylinder or other device or structure capable of driving the inner template to move.

[0042] In this embodiment, if Figure 7 As shown, the outer mold trolley may further include an outer mold adjustment structure 213, which drives the wall formwork to move.

[0043] The closing and withdrawing of the single-side wall formwork is achieved by the external mold adjustment mechanism cooperating with each other to perform telescopic movement. The external mold adjustment mechanism can be selected as an oil cylinder, and the closing and withdrawing of the wall formwork is achieved by the oil cylinder driving the expansion and contraction of the piston rod.

[0044] For example, Figure 6 As shown, a first operating platform 240 is also provided on the second supporting frame.

[0045] Construction workers can stand on the first operating platform to carry out construction work, and guardrails can be arranged on the outside of the first operating platform to improve the safety of construction work.

[0046] In this embodiment, if Figure 7 As shown, the second support frame may include a first column 212, the second walking wheel assembly is installed at the bottom of the first column, the first column is provided with two groups, the two groups of the first columns are arranged opposite to each other, the two groups of the columns are connected by a first top cross beam 211, the adjacent first top cross beams are connected by a second main longitudinal beam 214, a head suspension beam 217 may be provided between adjacent first top cross beams, a cross link 215 is provided between adjacent first columns in the same group, and a lower platform 216 is provided at the lower part of the adjacent first columns in the same group.

[0047] For example, Fig.10 As shown, the fourth support frame is provided with a height adjustment device 412, through which the top platform is driven to rise and fall.

[0048] In this embodiment, the height of the top platform can be adjusted through the height adjustment device, so that the height of the top platform can be adjusted according to the actual construction situation, thereby improving the application range of the trolley. At the same time, after the steel bars are tied, the top platform is lowered through the height adjustment device to separate the comb plate from the steel bars, avoiding the steel bars from interfering with the movement of the trolley inside the steel bars.

[0049] In this embodiment, the height adjustment device can be an oil cylinder, an air cylinder, an electric cylinder or other device or structure that can drive the top platform to rise and fall. For example, a fixed column that is slidably connected to the fourth support frame can be set on the fourth travel wheel assembly, and the oil cylinder is installed on the fourth support frame, and the piston rod is connected to the fourth travel wheel assembly. The oil cylinder drives the piston rod to extend and retract to realize the lifting and lowering of the top platform. The lifting and lowering of the above-mentioned inner mold trolley can also refer to this solution.

[0050] In this embodiment, if Fig.10 As shown, the second comb plate is connected to the side of the top platform through a comb plate adjusting beam.

[0051] The width of the top platform can be adjusted by the comb plate adjustment beam to make adaptive adjustments according to the actual construction conditions and improve the applicable scope of the trolley. Specifically, an upper screw assembly can be set on the top of the fourth support frame, and the comb plate adjustment beam can be driven by the upper screw assembly to adjust the width of the top platform, and the single-side adjustment amount is 100mm.

[0052] like Fig.15 , 16 As shown, a connecting hole 422B is provided on the surface of the second comb plate, and a fixing hole 423A is provided on the surface of the comb plate adjusting beam corresponding to the connecting hole, and the second comb plate and the comb plate adjusting beam are fixed by bolts, screws, etc. in cooperation with the connecting hole and the fixing hole. The first comb plate and the second comb plate have the same structure.

[0053] In addition, if Fig.10 , 11 As shown, a guardrail 421 may also be installed on the outside of the top platform to improve construction safety.

[0054] In addition, Fig. 9As shown, the fourth support frame may also include a second lower longitudinal beam 413, the fourth walking wheel assembly is installed at the bottom end of the second lower longitudinal beam, a second height extension piece 414 is provided at the top end of the second lower longitudinal beam, a second upper longitudinal beam 415 is provided at the end of the second height extension piece away from the second lower longitudinal beam, a third height extension piece 416 is provided at the end of the second upper longitudinal beam away from the second height extension piece, the top platform is fixed to the end of the third height extension piece away from the second upper longitudinal beam, a width extension piece 411 is provided between adjacent second upper longitudinal beams and between adjacent second lower longitudinal beams, and the height adjustment device can be installed on the width extension piece arranged between adjacent second lower longitudinal beams.

[0055] For example, Fig.12 As shown, a second operating platform 340 is provided on the third support frame corresponding to the first comb plate 360 ​​.

[0056] By setting up a second operating platform, it is convenient to tie the vertical steel bars.

[0057] In this embodiment, if Fig.13 , 14 As shown, the third support frame may include a second column 310, the third walking wheel assembly is installed at the bottom of the second column, the second column is provided with two groups, the two groups of the second columns are arranged opposite to each other, the two groups of the second columns are connected by a top cross beam, and the second columns in the same group are connected by a top longitudinal beam.

[0058] Embodiment 2: This embodiment provides a box culvert construction method, which uses the box culvert trolley described in Example 1. The box culvert construction method includes: Step 1: Install the first and second tracks from the first section to the second section of the box culvert foundation.

[0059] Step 2: Install the inner and outer mold trolleys at the first section of the box culvert foundation, tie the steel bars of the first section, close and adjust the mold with a manual mold removal device, and tighten the tension rods manually.

[0060] Step 3: Pour the first section of concrete and start maintenance. The general maintenance time is 3 to 4 days.

[0061] Step 4: While performing maintenance, install the inner and outer steel bar trolleys at the second section (install directly on the ground, pay attention to anti-slip and fixation), tie the steel bars of the second section and fix the top plate steel bars to the crossbeam of the outer steel bar trolley.

[0062] Step 5: After 4 days of maintenance of the concrete in the first section, the formwork was removed; the inner steel bar trolley was manually pushed to the third section, and the outer steel bar trolley continued to hold the top plate steel bars; the inner form trolley was dragged by the winch along the track to the position of the top plate steel bars in the second section, and the top plate steel bars were positioned with the inner formwork support. The outer steel bar trolley moved forward to the third section and began to tie the steel bars in the third section. The outer steel bar trolley was equipped with a construction platform, guardrails and ladders to ensure construction safety.

[0063] Step 6: The inner and outer mold trolleys are equipped with an inner mold lifting assembly and an outer mold adjustment mechanism to adjust the inner and outer mold heights to meet the design requirements. Both the inner and outer mold trolleys are moved by winches. The inner and outer mold trolleys can carry the inner and outer mold plates and move them to the next section.

[0064] Step 7: The inner and outer trolleys for steel bar binding can be pushed manually because they only carry their own weight (maximum 6.7 tons) when moving. When the longitudinal slope is large (greater than 5%), pay attention to pulling and resisting at the same time to prevent the trolley from accelerating.

[0065] Step 8: The outer mold trolley moves forward to the second section together with the outer mold to start mold closing, mold adjustment and concrete pouring. The inner mold trolley closes and removes the mold by manually turning the upper and lower screw assemblies.

[0066] Step 9: Repeat steps 4 to 8 above to complete the pouring of all subsequent sections.

[0067] In this embodiment, in order to install the second track, the foundation needs to be widened outward by 300-400mm. Before installing the box culvert trolley, the wall height of 1000mm needs to be cast first. The inner mold trolley is equipped with an upper and lower layer of screw assemblies, and the mold closing and demolding are completed manually. The outer mold trolley is completed by the outer mold adjustment mechanism to close and demold. The movement of the inner and outer mold trolleys and their tracks can be achieved by manually starting the winch. The inner and outer steel bar trolleys are light in weight and can be pushed manually on the ground.

[0068] Specifically, when the inner mold trolley is demolded: retract the lower screw assembly at both ends of the trolley by 100mm to separate the lower part of the inner molds on both sides from the concrete. Then, retract all the inner mold trolley lifting assemblies by 10mm. Then retract the upper screw assembly at both ends of the trolley by 50mm. Since there is a wedge-shaped top mold in the middle of the trolley top mold, the wedge-shaped top mold can be lifted up when the left and right top molds are retracted. Finally, retract all the inner mold trolley lifting assemblies by 100mm. After all the inner molds and top molds are separated from the concrete, the demolding of all the top molds is completed.

[0069] When the inner mold trolley is moving, after the steel bar inner trolley moves out of the second section, the inner mold trolley is driven forward along the track by a winch or other means. The track is composed of two sections and can be split and moved forward in sections. After the trolley reaches the end of the track, the track of the next section is moved manually to the place where it needs to be moved forward, so that the trolley can move forward one section.

[0070] In this embodiment, the mold closing and mold withdrawal of the outer mold trolley are realized by the outer mold adjustment mechanism on the top cross beam cooperating with each other to perform telescopic movement. The movement of the outer mold trolley can be driven by manually starting the winch. When the outer mold trolley moves forward to the end of the track and cannot move forward further, the alternating forward movement of the segmented track is completed manually. This is repeated to complete the alternating forward movement of the trolley and the track. The head mold lifting beam can lift the head mold plate and move it forward together.

[0071] In this embodiment, a bearing platform for the top plate steel bars is provided by the inner steel bar trolley. After the steel bars are tied, the load is transferred to the outer steel bar trolley so that the inner steel bar trolley can move forward to provide space for the inner mold trolley to move forward. The trolley can be pushed manually, and the height adjustment is achieved by a lifting device.

[0072] In this embodiment, a construction platform for tying the outer reinforcement of the box culvert wall is provided by the outer reinforcement trolley. After the inner reinforcement trolley is removed, it can be used as a temporary bearing device for the reinforcement of the box culvert top plate. The movement of the outer reinforcement trolley can be completed by manual pushing. The outer reinforcement of the wall is positioned by the positioning groove of the second comb plate. The comb plate is provided with an adjustment device to adjust its front, back, left and right positions.

[0073] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A new type of box culvert trolley, characterized in that: include: An inner mold trolley, which can move linearly along the extension direction of the box culvert foundation, and the inner mold trolley includes a first support frame, inner side molds are arranged on both sides of the first support frame, and an inner top mold is arranged on the top; An outer mold trolley, which is entirely wrapped around the outer side of the inner mold trolley, and can move linearly along the extension direction of the box culvert foundation, and the outer mold trolley includes a second support frame, and wall formworks are arranged on both sides of the second support frame; A steel bar inner trolley, which can move linearly along the extension direction of the box culvert foundation, and includes a fourth support frame, a top platform is provided on the top of the fourth support frame, a second comb plate is provided around the top platform, and a positioning groove for partially accommodating the steel bar is provided on the second comb plate; The outer steel bar trolley is entirely wrapped around the outer side of the inner steel bar trolley and can move linearly along the extension direction of the box culvert foundation. The outer steel bar trolley includes a third support frame, and a first comb plate is provided on the inner side of the third support frame.

2. A new type of box culvert trolley according to claim 1, characterized in that: A first traveling wheel assembly is provided at the bottom of the first supporting frame, and a first track is provided on the box culvert basis corresponding to the first traveling wheel assembly; A second running wheel assembly is provided at the bottom of the second support frame, and a second track is provided on the box culvert basis corresponding to the second running wheel assembly, wherein the second track is parallel to the first track; A third running wheel assembly and a fourth running wheel assembly are provided at the bottom of the third supporting frame and the bottom of the fourth supporting frame in sequence, and the third running wheel assembly and the fourth running wheel assembly are in contact with the surface of the box culvert foundation.

3. The novel box culvert trolley according to claim 1 is characterized in that: A transverse movement assembly is also provided at the bottom of the first support frame.

4. A new type of box culvert trolley according to claim 1, characterized in that: A screw assembly is provided between the first support frame and the inner template, and the inner template is driven to move by the screw assembly; The first support frame is also provided with a first lifting assembly, through which the inner top template is driven to rise and fall.

5. The novel box culvert trolley according to claim 1 is characterized in that: The outer mold trolley also includes an outer mold adjustment structure, which drives the wall formwork to move.

6. The novel box culvert trolley according to claim 1 is characterized in that: A first operating platform is also arranged on the second supporting frame.

7. The novel box culvert trolley according to claim 1 is characterized in that: The fourth support frame is provided with a height adjustment device, and the top platform is driven to rise and fall by the height adjustment device.

8. The novel box culvert trolley according to claim 1 is characterized in that: The second comb plate is connected to the side of the top platform through a comb plate adjusting beam.

9. The novel box culvert trolley according to claim 1 is characterized in that: A second operating platform is provided on the third supporting frame corresponding to the first comb plate.

10. A box culvert construction method, characterized in that: The box culvert construction method adopts the box culvert trolley described in any one of claims 1 to 9 above, and the box culvert construction method comprises: Install the first track and the second track at the position of the first section to the second section of the box culvert foundation, and install the inner and outer mold trolleys at the first section of the foundation bottom plate; Tie the steel bars of the first section, close and adjust the mold with a manual mold removal device, and tighten the tension rods manually; Pour the first section concrete and start maintenance. During maintenance, install the inner and outer reinforcement trolleys at the second section, tie the reinforcement of the second section and fix the top plate reinforcement on the crossbeam of the outer reinforcement trolley; After the formwork of the first section concrete is removed, the inner steel bar trolley moves to the third section, the outer steel bar trolley continues to hold the top plate steel bars, the winch drags the inner formwork trolley along the track to the top plate steel bar position of the second section, the top plate steel bars are positioned with the inner formwork support, the outer steel bar trolley moves forward to the third section, and the above steps are repeated to complete the construction of concrete for subsequent sections.

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