A template trolley width adjustment mechanism

Abstract

The utility model discloses a template trolley's variable width adjusting mechanism has the following beneficial effects: provide the variable width adjusting mechanism of trolley, this variable width adjusting mechanism includes variable width adjusting oil cylinder, pull structural member, locking device and variable width filling template, compared with the full hall formwork support frame system of disc buckle type steel pipe support erection of prior art, the utility model can conveniently realize the variable width adjusting of template trolley through variable width adjusting mechanism, and repeatedly set up and dismantle the formwork support frame is not needed, and safe and efficient make template trolley can be adjusted to the design width quickly, tunnel inner contour control is accurate, satisfy the construction requirement of flat curve gradual change widening section, and template trolley space stiffness is big, and the incidence of running formwork, wrong formwork and wrong seam is low, and concrete pouring quality is high, can solve the situation that variable cross section open cut rectangular frame tunnel construction must adopt full support to carry out structure width adjustment, make the full section trolley construction variable cross section open cut rectangular frame tunnel become possible.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically to a widening adjustment mechanism for a template trolley. Background Technology

[0002] In tunnel construction, the cut-and-cover method for rectangular frame tunnels offers advantages such as convenient construction and high safety and quality assurance, making it a promising candidate for application in modern urban road network structures. However, the construction technology of the main tunnel structure remains a key focus and challenge in cut-and-cover tunnel construction. As part of municipal roads, tunnels inevitably feature horizontal curves, with widening of the outer side of the curves, resulting in a wider tunnel structure. Furthermore, municipal roads generally have lower design speeds, allowing for smaller minimum horizontal curve radii in design standards. This further increases the construction difficulty of the tunnel structure in the gradually widening sections of the horizontal curves.

[0003] Traditional open-cut rectangular frame tunnel construction primarily uses disc-lock steel pipe scaffolds as the formwork for structural construction. This is especially true for the gradually widening sections of the tunnel structure, where disc-lock scaffolds are used to erect frames of varying widths to accommodate changes in the width of the roof slab during the construction of the gradually widening tunnel structure.

[0004] However, in the construction of the gradually widening section of the horizontal curve of the open-cut rectangular frame tunnel, the full-span formwork system erected by the disc-lock steel pipe scaffolding needs to be repeatedly erected and dismantled. The workload of adjusting the width of the formwork is large, the construction is cumbersome, and the safety risks are high. In addition, the full-span formwork system has low spatial stiffness and large deformation, resulting in obvious misalignment and joints in the concrete pouring of the tunnel structure, and low quality assurance. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a widening adjustment mechanism for a template trolley, which can solve the aforementioned technical problems.

[0007] (II) Technical Solution

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a widening adjustment mechanism for a template trolley, the template trolley including a top mold and a top crossbeam, the top mold including two templates, the two templates being detachably connected, the two templates being distributed left and right along the width direction of the template trolley, the widening adjustment mechanism including a widening adjustment cylinder, a tensioning component, a locking device, and a widening filling template, the top mold being slidably mounted on the top crossbeam, the top mold being detachably connected to the top crossbeam through the locking device, tensioning components being provided at both ends of the widening adjustment cylinder, the tensioning components at both ends of the widening adjustment cylinder being used to connect to the two templates respectively to drive the two templates to slide on the top crossbeam, and the widening filling template being used to be installed in the widening gap of the top mold.

[0009] Preferably, the top mold is divided into two templates along the center line of the template trolley.

[0010] Preferably, the tension member is an ear plate.

[0011] Preferably, the locking device is a hook bolt.

[0012] Preferably, the variable-width infill template includes wooden templates of different widths.

[0013] Preferably, the two templates are detachably connected by longitudinal flanges and bolts.

[0014] Preferably, it also includes a cylinder mounting bracket, which is mounted on the template trolley and is used to mount the width-adjusting cylinder.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a widening adjustment mechanism for a template trolley, which has the following beneficial effects: This utility model provides a widening adjustment mechanism for a template trolley, which includes a widening adjustment cylinder, a tensioning component, a locking device, and a widening filling template. Compared with the existing full-span formwork system erected by disc-type steel pipe supports, this utility model can easily achieve widening adjustment of the template trolley through the widening adjustment mechanism, without the need for repeated erection and dismantling of the formwork support, which is safe and efficient. It allows the template trolley to be quickly adjusted to the design width, and the tunnel contour control is precise, meeting the construction requirements of the gradually widening section of the horizontal curve. In addition, the template trolley has high spatial rigidity, and the incidence of formwork slippage, misalignment, and joint misalignment is low, resulting in high concrete pouring quality. Through the application of this utility model, the situation where full-span supports must be used for structural width adjustment in the construction of variable cross-section open-cut rectangular frame tunnels is solved, making it possible to construct variable cross-section open-cut rectangular frame tunnels using full-section template trolleys and other template trolleys. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the top mold and the width-adjusting hydraulic cylinder of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the top mold and the widened filling template of this utility model;

[0019] Figure 3 This is a structural schematic diagram of the top mold, the widened filling template, and the top crossbeam of this utility model.

[0020] The diagram is labeled as follows: 1 Template, 2 Top beam, 3 Width adjustment cylinder, 4 Tension structural component, 5 Width-adjusting filling template. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] This utility model provides a widening adjustment mechanism for a template trolley. The template trolley includes a top mold and a top crossbeam 2. The top mold is the template located at the top of the template trolley. The template of the template trolley usually includes a top mold and side molds located on both sides of the top mold. The top mold and the side molds are connected by axle corner templates. The top crossbeam 2 is the gantry crossbeam of the template trolley. The template trolley can be a full-section template trolley or other types of template trolleys in the prior art for tunnel construction. No further restrictions are imposed here.

[0023] Specifically, the top mold includes two templates 1, which are detachably connected. The two templates 1 are distributed left and right along the width direction of the template trolley. The widening adjustment mechanism includes a widening adjustment cylinder 3, a tension member 4, a locking device, and a widening filling template 5. The top mold, i.e., the two templates 1, is slidably set on the top beam 2. The top mold is detachably connected to the top beam 2 through the locking device. Both ends of the widening adjustment cylinder 3 are provided with tension members 4. The tension members 4 at both ends of the widening adjustment cylinder 3 are used to connect to the two templates 1 respectively to drive the two templates 1 to slide on the top beam 2. The widening filling template 5 is used to be installed in the widening gap of the top mold.

[0024] Preferably, the top mold is divided into two templates 1 along the center line of the template trolley, meaning that the two templates 1 have the same width. Furthermore, the two templates 1 can be detachably connected via longitudinal flanges and bolts. Of course, other structural components can also be used for the detachable connection of the two templates 1; no further restrictions are placed here.

[0025] Specifically, the locking device can be a hook bolt, which, together with multiple screw holes distributed along the width direction on the top crossbeam 2, enables the top mold and the top crossbeam 2 to be detachably connected and fixed. Of course, the locking device can also adopt other structural forms, which are not limited here.

[0026] It is understood that this utility model uses a widening adjustment mechanism to push the top formwork of the trolley to slide to both sides, thereby changing the overall width of the top and side forms, that is, changing the overall width of the formwork trolley to achieve the purpose of widening the trolley. This allows the overall pouring width of the trolley to gradually increase from 12.2m to 13.25m in the tunnel transition curve section to meet the pouring requirements of the widening section of the structure. The specific widening adjustment process is as follows: Before the trolley widening operation, the bolts on the longitudinal flanges of the two formwork panels 1 are loosened to divide the top formwork into two formwork panels 1; then the hook bolts (i.e., lock bolts) temporarily connecting the top formwork and the top crossbeam 2 are tightened. The fixing device is released; further, the tensioning components 4 at both ends of the width-adjusting cylinder 3 are respectively connected and fixed to the two templates 1. Then, the width-adjusting cylinder 3 drives the extension to drive the two templates 1 to slide on the top beam 2, thereby changing the overall width of the top mold and side mold, that is, changing the overall width of the template trolley; finally, after the above-mentioned width-adjusting action is completed, the width-adjusting cylinder 3 is removed from the top mold, the hook bolts temporarily connecting the top mold and the top beam 2 are tightened, and at the same time, the width-adjusting filling template 5 is installed in the width-adjusting gap between the two templates 1. The trolley can be widened by up to 1.05m.

[0027] Specifically, the aforementioned tension member 4 can be an ear plate, and connecting members can be appropriately provided at the bottom of the template 1 to connect with the tension member 4, thereby realizing the connection between the template 1 and the width-adjusting hydraulic cylinder 3; alternatively, other structural forms of tension members can also be used. Preferably, multiple width-adjusting hydraulic cylinders 3 are provided. Furthermore, this utility model may also include a hydraulic cylinder mounting frame, which is mounted on the template trolley and used to mount the width-adjusting hydraulic cylinders 3 when they are idle. The aforementioned width-adjusting filling template 5 preferably includes wooden templates of different widths to adapt to the different width-adjustment requirements of the template trolley.

[0028] Compared with the prior art, this utility model provides a widening adjustment mechanism for a template trolley, which has the following beneficial effects: This utility model provides a widening adjustment mechanism for a template trolley, which includes a widening adjustment cylinder, a tensioning component, a locking device, and a widening filling template. Compared with the existing full-span formwork system erected by disc-type steel pipe supports, this utility model can easily achieve widening adjustment of the template trolley through the widening adjustment mechanism, without the need for repeated erection and dismantling of the formwork support, which is safe and efficient. It allows the template trolley to be quickly adjusted to the design width, and the tunnel contour control is precise, meeting the construction requirements of the gradually widening section of the horizontal curve. In addition, the template trolley has high spatial rigidity, and the incidence of formwork slippage, misalignment, and joint misalignment is low, resulting in high concrete pouring quality. Through the application of this utility model, the situation where full-span supports must be used for structural width adjustment in the construction of variable cross-section open-cut rectangular frame tunnels is solved, making it possible to construct variable cross-section open-cut rectangular frame tunnels using full-section template trolleys and other template trolleys.

[0029] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A width-adjusting mechanism for a template trolley, the template trolley comprising a top mold and a top crossbeam, characterized in that: The top mold includes two templates, which are detachably connected and distributed left and right along the width direction of the template trolley. The widening adjustment mechanism includes a widening adjustment cylinder, a tension member, a locking device, and a widening filling template. The top mold is slidably mounted on the top crossbeam and is detachably connected to the top crossbeam via the locking device. The tension member is provided at both ends of the widening adjustment cylinder, and is used to connect to the two templates respectively to drive the two templates to slide on the top crossbeam. The widening filling template is used to be installed in the widening gap of the top mold.

2. The width-adjusting mechanism of the template trolley according to claim 1, characterized in that: The top mold is divided into two templates along the center line of the template trolley.

3. The width-adjusting mechanism of the template trolley according to claim 1, characterized in that: The tension member is an ear plate.

4. The width-adjusting mechanism of the template trolley according to claim 1, characterized in that: The locking device is a hook bolt.

5. The width-adjusting mechanism of the template trolley according to claim 1, characterized in that: The variable-width infill template includes wooden templates of different widths.

6. The width-adjusting mechanism of the template trolley according to claim 1, characterized in that: The two templates are detachably connected by longitudinal flanges and bolts.

7. The width-adjusting mechanism of the template trolley according to claim 1, characterized in that: It also includes a cylinder mounting bracket, which is mounted on the template trolley and is used to mount the width-adjusting cylinder.

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