Culvert mold moving construction method

Abstract

The invention discloses a culvert mold moving construction method which comprises the following steps: arranging a foldable or unfoldable movable roller at the bottom of a bracket, folding the movable roller at the current section so as to firmly fix the movable roller on a foundation concrete surface of the current section, and then connecting the bracket with an inner mold plate after a walking trolley is detached, so that the movable roller can be folded and firmly fixed on the foundation concrete surface of the current section; through connection of the inner formwork and the outer formwork, concrete pouring can be carried out on the current section through the inner formwork and the outer formwork to form wall bodies on the two sides, finally, construction of a cover plate of the section can be carried out, and after construction of the current section is completed, only the movable rolling wheels need to be unfolded, then the support is pushed to the next section, and construction is completed. And the bottom of the inner formwork and the bottom of the outer formwork are plugged into the walking trolley to be pushed to the next section, so that construction of the next section is conducted, and the formworks and the support are moved forwards section by section to conduct pouring construction in this way till construction of the whole culvert is completed, so that the requirement for rapid construction of the culvert can be met under the condition that one set of formworks and support is adopted. The cost is saved, and the construction period is shorter.

Description

Technical Field

[0001] This application relates to the technical field of civil engineering, and particularly to a construction method for moving formwork of culverts. Background Art

[0002] A culvert generally refers to a drainage passage built under the roadbed and below the road surface in highway and railway engineering construction. In order to enable the highway and railway to pass through the water channel smoothly without hindering traffic, this structure allows water to flow under the highway or railway. With the development of highway construction, there are also cases where the highway is built underground in the form of one or more culverts, thus realizing a more safe and scientific traffic mode where pedestrians can pass on the ground and vehicles can pass through the culverts underground.

[0003] A culvert cover plate is a structural member used to cover the top of the culvert. Its main function is to provide a flat and solid surface to bear the loads of the overlying road, railway or other structures without affecting the normal drainage function of the culvert. The design and construction of culvert cover plates need to comprehensively consider factors such as mechanical properties, durability, economy and construction convenience.

[0004] Currently, the formwork method (Formwork) is adopted for culverts. The formwork method refers to the process of building temporary support structures and formwork for pouring concrete in construction projects. These formworks are used to form the shape of concrete components and ensure that they maintain the required dimensions and positions during the hardening process. However, this method requires repeated disassembly and assembly for each section, so a large amount of manpower and material resources need to be invested, the construction period is long, a large amount of turnover materials are required, and the cost is high. Summary of the Invention

[0005] The purpose of this application is to provide a construction method for moving formwork of culverts, which saves material costs, greatly reduces the workload of formwork installation, saves labor costs, and has a shorter construction period.

[0006] The embodiments of this application can be implemented as follows:

[0007] In a first aspect, the present invention provides a construction method for moving formwork of culverts, including:

[0008] S1, fold the movable rollers provided at the bottom of the support in the current section, and remove the traveling trolleys at the bottom of the inner formwork and the outer formwork respectively;

[0009] S2, firmly connect the inner formwork to the support and the outer formwork respectively;

[0010] S3, pour the side wall bodies of the current section through the inner formwork and the outer formwork;

[0011] S4, construct the cover plate on the culvert platform at the top of the side wall bodies of the current section;

[0012] S5. Loosen the connection between the support and the inner formwork, and loosen the connection between the inner formwork and the outer formwork.

[0013] S6. Expand the movable rollers at the bottom of the support and push them to the next segment; insert walking trolleys at the bottoms of the inner formwork and the outer formwork respectively and push them to the next segment.

[0014] In an alternative embodiment, in step S2, drill tie rod holes in the inner formwork and the outer formwork respectively and install tie bolts.

[0015] In step S5, remove the tie bolts.

[0016] In an alternative embodiment, the spacing between two adjacent tie rod holes in the longitudinal direction is 75 cm, and the spacing between two adjacent tie rod holes in the vertical direction is 60 cm.

[0017] In an alternative embodiment, in step S2, use internal support steel pipes to adjust the verticality of the inner formwork. After adjustment, connect them firmly to the support and the inner formwork.

[0018] In step S5, loosen the connections between the internal support steel pipes and the support and the inner formwork respectively.

[0019] In an alternative embodiment, in step S2, use universal fasteners to connect the internal support steel pipes firmly to the support and the inner formwork.

[0020] In step S5, loosen the universal fasteners between the internal support steel pipes and the support and the inner formwork respectively.

[0021] In an alternative embodiment, in step S5, after the wall concrete strength reaches 2.5 MPa, loosen the connection between the inner formwork and the outer formwork, and use steel pipes to temporarily brace the inner formwork and the outer formwork.

[0022] In an alternative embodiment, in step S4, connect and fix the bottom formwork through an I-beam distribution beam at the top of the support, and form a cover plate by pouring concrete on the bottom formwork.

[0023] In an alternative embodiment, the movable rollers are swingably arranged at the bottom of the support. When the movable rollers are in the folded state or the unfolded state, fix the movable rollers by inserting pins through the movable rollers and the support.

[0024] In an alternative embodiment, in step S1, pad up a certain height at the position near the movable rollers at the bottom of the support to make the movable rollers airborne, then pull out the pins, turn the movable rollers forward, and then insert the pins back and lower the support.

[0025] In step S6, lift the bottom of the support by a certain height near the movable roller, then pull out the pin, turn the movable roller downward, and then insert the pin back and lower the support so that the movable roller touches the base concrete surface.

[0026] In an alternative embodiment, in step S1, lift the bottom of the inner formwork or the outer formwork by a certain height, and then remove the walking trolley.

[0027] In step S6, lift the bottom of the inner formwork or the outer formwork by a certain height, and then insert the walking trolley.

[0028] Compared with the prior art, the beneficial effects of the embodiments of the present application include, for example:

[0029] By providing a collapsible or expandable movable roller at the bottom of the support, the movable roller can be collapsed in the current segment to be firmly fixed on the base concrete surface of the current segment, and then the support is connected to the inner formwork after removing the walking trolley. Through the connection between the inner formwork and the outer formwork, the concrete can be poured through the inner formwork and the outer formwork to form the side wall bodies on both sides in the current segment. Finally, the construction of the cover plate of this segment can be carried out. After the construction of the current segment is completed, only the movable roller needs to be expanded, then the support is pushed to the next segment, and the walking trolley is inserted into the bottom of the inner formwork and the outer formwork and pushed to the next segment, so as to carry out the construction of the next segment. In this way, the formwork and the support are moved forward section by section for pouring construction until the entire culvert construction is completed, so as to meet the requirements of rapid culvert construction under the condition of using a set of formwork and support. This method of moving the formwork and the support section by section has simple construction process equipment and is easy to use. At the same time, under the condition of equal workload and construction period, the amount of turnover materials invested at one time is 1 / 3 - 1 / 6 of that of the traditional formwork method, which greatly saves the quantity of turnover materials and saves the material cost; moreover, the support and the formwork only need to be moved forward section by section, the installation workload is greatly reduced, and the installation and removal workload is only 1 / 3 - 1 / 6 of that of the traditional formwork method, saving labor costs and shortening the construction period. Description of the Drawings

[0030] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a flow chart of the culvert formwork moving construction method of the present application;

[0032] Figure 2 It is one of the schematic diagrams of the construction state in the present application;

[0033] Figure 3 This is the second schematic diagram of the construction state in this application;

[0034] Figure 4 This is the schematic diagram of the support in this application.

[0035] Icons: 100 - Foundation concrete; 110 - Wall body; 120 - Cover plate; 200 - Support; 210 - Movable roller; 220 - Jack; 230 - I-beam distribution beam; 300 - Bottom formwork. Detailed implementation manners

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Usually, the components of the embodiments of this application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application that is claimed, but merely represents selected embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0038] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0039] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In addition, the terms "first", "second", "third", etc. are only used for differential description and should not be construed as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0041] In the description of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] The following will Figures 1 to 4 describe some embodiments of the present application in detail with reference to the attached drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0043] An embodiment of the present application discloses a culvert moving form construction method, which includes the following steps S5 to S6:

[0044] Step S1: Fold up the movable rollers 210 arranged at the bottom of the support 200 in the current segment, and separately remove the traveling trolleys at the bottoms of the inner formwork and the outer formwork.

[0045] Step S2: Firmly connect the inner formwork to the support 200 and the outer formwork respectively.

[0046] Step S3: Pour the side wall bodies 110 of the current segment through the inner formwork and the outer formwork.

[0047] Step S4: Construct the cover plate 120 on the culvert platform at the top of the side wall bodies 110 of the current segment.

[0048] Step S5: Loosen the connection between the support 200 and the inner formwork, and loosen the connection between the inner formwork and the outer formwork.

[0049] Step S6: Expand the movable rollers 210 at the bottom of the support 200 and push them to the next segment, separately insert the traveling trolleys at the bottoms of the inner formwork and the outer formwork, and push them to the next segment.

[0050] In this way, by setting the collapsible or expandable movable rollers 210 at the bottom of the support 200, the movable rollers 210 can be collapsed in the current segment to be firmly fixed on the foundation concrete 100 surface of the current segment. Then, the support 200 is connected to the inner formwork after removing the traveling trolley. Through the connection between the inner formwork and the outer formwork, the concrete can be poured through the inner formwork and the outer formwork to form the side wall bodies 110 on both sides in the current segment. Finally, the construction of the cover plate 120 of this segment can be carried out. After the construction of the current segment is completed, only the movable rollers 210 need to be expanded, and then the support 200 is pushed to the next segment. The bottoms of the inner formwork and the outer formwork are inserted into the traveling trolley and pushed to the next segment, so as to carry out the construction of the next segment. In this way, the formwork and the support 200 are moved forward section by section for pouring construction until the entire culvert construction is completed, so that the requirements of rapid culvert construction can be met under the condition of using a set of formwork and support 200. This method of moving the formwork and the support 200 section by section has simple construction process equipment and is easy to use. At the same time, under the condition that the workload and the construction period are equal, the amount of turnover materials invested at one time is 1 / 3 to 1 / 6 of that of the traditional formwork method, greatly saving the quantity of turnover materials and saving the material cost. Moreover, the support 200 and the formwork only need to be moved forward section by section, the installation workload is greatly reduced, and the installation and disassembly workload is only 1 / 3 to 1 / 6 of the traditional formwork method, saving the labor cost and shortening the construction period.

[0051] In this embodiment, the support 200 is composed of multiple steel pipes with a diameter of 48 mm. The spacing between adjacent two vertical steel pipes in the longitudinal and transverse directions is 1.2 m. That is, the longitudinal spacing and the transverse spacing of the vertical steel pipes are both 1.2 m, and the step distance of the upper and lower layer horizontal steel pipes is 1.5 m. A bottom bar is provided about 10 cm above the ground at the lowest layer. In order to facilitate the walking of the support 200, movable rollers 210 that can swing back and forth are installed at 0.6 m inward from the four corners of the support 200, and the outer diameter of the movable rollers 210 is 10 cm. The movable rollers 210 are swingably arranged at the bottom of the support 200. When the movable rollers 210 are in the collapsed state or the expanded state, the movable rollers 210 are fixed by inserting pins through the movable rollers 210 and the support 200.

[0052] The inner formwork and the outer formwork are assembled with large-sized combined steel formwork. Temporary scaffolding used for building and assembling the outer formwork is erected. It is determined according to the sectional length of the culvert section and the height of the culvert body, and large-area formwork is respectively assembled. In addition to being connected by snap fasteners, the formwork is firmly connected to the formwork with longitudinal steel pipes and vertical steel pipes on its outer side respectively, so that the assembled whole formwork has better integrity. At the same time, pull holes are respectively drilled on the inner formwork and the outer formwork for installing pull bolts. The spacing of the holes is 75 cm longitudinally and 60 cm vertically. That is, the spacing between adjacent two pull rod holes longitudinally is 75 cm, and the spacing between adjacent two pull rod holes vertically is 60 cm. When drilling the holes, ensure that the holes of the inner and outer formworks are horizontal and symmetrical, so that the pull bolts can smoothly enter and exit horizontally.

[0053] The traveling trolley can be composed of a 50-mm channel steel with rollers installed on the lower side of the channel steel.

[0054] Specifically, in step S1, a certain height is padded at the bottom of the support 200 near the movable roller 210 to lift the movable roller 210 off the ground. Then, the pin is pulled out, the movable roller 210 is turned forward, and the pin is inserted back and the support 200 is lowered, so that the vertical steel pipes of the entire support 200 are evenly supported on the surface of the foundation concrete 100. To reduce the deformation of the support 200 at the movable roller 210, a vertical auxiliary support 200 is installed on the horizontal steel pipe near the movable roller 210. Then, a certain height is padded at the bottom of the inner formwork or the outer formwork, and the traveling trolley is removed, so that the inner formwork and the outer formwork are evenly supported on the surface of the foundation concrete 100.

[0055] In step S2, longitudinal steel pipes are installed above and below the tie rod holes and firmly connected to the formwork, and the vertical steel pipes are firmly connected to the longitudinal steel pipes. The verticality of the inner formwork is adjusted with inner bracing steel pipes, and after the adjustment is completed, they are firmly connected to the support 200 and the inner formwork; among them, the inner bracing steel pipes are firmly connected to the support 200 and the inner formwork with universal fasteners; tie rod holes are drilled in the inner formwork and the outer formwork respectively and tie bolts are installed. Specifically, tie rods with sleeves are installed, and the position of the outer formwork is gradually adjusted by using temporary horizontal wooden braces between the inner and outer formworks and tightening the nuts of the tie rods. After passing the inspection, the concrete pouring of the wall body 110 can be carried out, that is, step S3 is executed.

[0056] In step S5, the connections between the inner bracing steel pipes and the support 200 and the inner formwork are loosened respectively. That is, the universal fasteners between the inner bracing steel pipes and the longitudinal steel pipes on the support 200 and the longitudinal steel pipes on the inner formwork are loosened respectively; in addition, after the concrete strength of the wall body 110 reaches 2.5 MPa, the tie bolts are removed to loosen the connection between the inner formwork and the outer formwork, and the inner formwork and the outer formwork are temporarily braced with steel pipes diagonally. That is to say, after the concrete strength reaches 2.5 MPa, the tie bolts are removed, the inner bracing steel pipes are loosened, and the inner and outer formworks are temporarily braced with steel pipes diagonally to prevent tipping.

[0057] In step S6, a certain height is padded at the position near the movable roller 210 at the bottom of the support 200. Then, the pin is pulled out, the movable roller 210 is turned downward, and the pin is inserted back to lower the support 200, so that the movable roller 210 contacts the foundation concrete 100. In this way, the support 200 can be pushed to the next segment, and the cycle operation is repeated to firmly connect with the inner formwork. A certain height is padded at the bottom of the inner formwork or the outer formwork, and then the traveling trolley is inserted. Specifically, the inner formwork is first padded to an appropriate height, and the walking trolleys are respectively arranged at the front and rear ends thereof. The formwork is manually pushed to the next segment. The outer formwork is pushed to the next segment by the same method, and the position is fixed by using temporary wooden struts and tie rods, so that the inner and outer formworks and the support 200 form an integral body, and the cycle operation is repeated to firmly connect the inner support steel pipe with the support 200.

[0058] It should be noted that the sequence of the above steps S1 - S6 is not specifically limited and can be flexibly arranged according to the actual construction requirements.

[0059] The support 200 and the formwork can be padded by using a mechanical jack 220.

[0060] In step S4, if the cover plate 120 is constructed by means of in - situ casting, the bottom formwork 300 is fixedly connected through the I - beam distribution beam 230 at the top of the support 200. In this way, the cover plate 120 can be formed by pouring concrete on the bottom formwork 300.

[0061] During construction, attention should be paid to the following: The concrete on both side walls should be poured evenly and symmetrically to prevent the asymmetric stress of the support 200 caused by asymmetric construction, which may lead to the deviation of the support 200 and directly cause the formwork to be skewed and the side wall line type to be unsmooth. The diameter, quantity of the tie rods and the quantity of the butterfly buckles are checked through calculation to ensure that no damage occurs during the concrete construction process. There are more than 2 nuts overlapping at each end of each tie rod, and at least 5 cm of tie rod threads are left outside the nuts on the tie rod to ensure that nuts can be added when necessary. The thread condition is often checked, and when serious damage is found, the tie rod is replaced in time. During the construction process, construction personnel are prevented from stepping on the tie rods to ensure the straightness of the tie rods so that the tie rods can be smoothly pulled out when the formwork is removed. During the movement of the formwork, temporary steel pipes are added as diagonal braces at the front and rear ends of the longitudinal steel pipes at the top of the formwork to prevent the formwork from overturning. When the formwork moves, the diagonal braces move step by step to ensure safety.

[0062] In summary, the culvert formwork moving construction method of this embodiment moves the culvert formwork and the support 200 forward section by section respectively and pours concrete section by section. Under the condition of using a set of formwork and support 200, it can meet the requirements of rapid culvert construction. It has at least the following advantages:

[0063] 1. Cost savings. When the workload and construction period are equal, the consumption of turnover materials such as steel pipes, formworks, and fasteners invested at one time is 1 / 3 to 1 / 6 of that of the traditional formwork support method, greatly saving the quantity of turnover materials and reducing material costs; the installation and removal workload of formworks and supports 200 is only 1 / 3 to 1 / 6 of that of the traditional formwork support method, and only 6 to 8 people are needed to complete all the work, saving labor costs.

[0064] 2. High speed. The installation and removal workload of formworks and supports 200 is only 1 / 3 to 1 / 6 of that of the traditional formwork support method, saving a large amount of time.

[0065] 3. Quality assurance. Since the internal support 200 can resist both tension and compression, and the tie rods effectively reinforce the exterior wall, the entire formwork system becomes a stable and firm whole, reducing the possibility of form bulging and form displacement.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A construction method for moving formwork of culverts, characterized in that, Including: S1. Fold the movable rollers arranged at the bottom of the support in the current segment, and remove the traveling trolleys at the bottom of the inner formwork and the outer formwork respectively; S2. Firmly connect the inner formwork to the support and the outer formwork respectively; S3. Pour the side wall bodies of the current segment through the inner formwork and the outer formwork; S4. Construct the cover slab on the top culvert platform of the side wall bodies of the current segment; S5. Loosen the connection between the support and the inner formwork, and loosen the connection between the inner formwork and the outer formwork; S6. Unfold the movable rollers at the bottom of the support and push them to the next segment; insert the traveling trolleys at the bottom of the inner formwork and the outer formwork respectively, and push them to the next segment.

2. The culvert moving formwork construction method according to claim 1, wherein In step S2, drill tie rod holes in the inner formwork and the outer formwork respectively and install tie bolts; In step S5, remove the tie bolts.

3. The culvert moving formwork construction method according to claim 2, characterized in that, The spacing between two adjacent tie rod holes in the longitudinal direction is 75 cm, and the spacing between two adjacent tie rod holes in the vertical direction is 60 cm.

4. The culvert moving formwork construction method according to claim 1, characterized in that In step S2, adjust the verticality of the inner formwork with internal bracing steel pipes, and firmly connect them to the support and the inner formwork after adjustment; In step S5, loosen the connection between the internal bracing steel pipes and the support and the inner formwork respectively.

5. The culvert moving formwork construction method according to claim 4, characterized in that In step S2, connect the internal bracing steel pipes to the support and the inner formwork firmly with universal fasteners; In step S5, loosen the universal fasteners between the internal bracing steel pipes and the support and the inner formwork respectively.

6. The culvert moving formwork construction method according to any one of claims 1-5, characterized in that, In step S5, loosen the connection between the inner formwork and the outer formwork after the wall body concrete strength reaches 2.5 MPa, and temporarily brace the inner formwork and the outer formwork with steel pipes.

7. The culvert moving formwork construction method according to claim 1, characterized in that, In step S4, connect and fix the bottom formwork through the I-beam distribution beam at the top of the support, and form the cover slab by pouring concrete on the bottom formwork.

8. The culvert moving formwork construction method according to claim 1 or 7, characterized in that The movable rollers can be swingably arranged at the bottom of the support. When the movable rollers are in the folded state or the unfolded state, the movable rollers are fixed by inserting pins through the movable rollers and the support.

9. The culvert moving formwork construction method according to claim 8, characterized in that, In step S1, pad up a certain height at the position near the movable rollers at the bottom of the support to make the movable rollers empty, then pull out the pins, turn the movable rollers forward, and then insert the pins again and lower the support; In step S6, pad up a certain height at the position near the movable rollers at the bottom of the support, then pull out the pins, turn the movable rollers downward, and then insert the pins again and lower the support to make the movable rollers contact the foundation concrete surface.

10. The culvert moving formwork construction method according to claim 1, characterized in that, In step S1, pad up a certain height at the bottom of the inner formwork or the outer formwork, and then take out the traveling trolley; In step S6, pad up a certain height at the bottom of the inner formwork or the outer formwork, and then insert the traveling trolley.

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