Casting construction method for steel skeleton arch bridge encased concrete hanging basket

Abstract

The invention provides a stiff skeleton arch bridge encased concrete hanging basket pouring construction method, a hanging and walking system and a hanging basket bottom die system are installed at the arch foot position of a stiff skeleton arch bridge, the hanging and walking system is a self-walking system and can walk along the stiff skeleton arch bridge, and the hanging basket bottom die system is hung below the hanging and walking system and can walk along the stiff skeleton arch bridge. The bottom die for pouring the encased concrete adopts a separated bottom die, is in an independent hanging basket form and is not bound and hoisted with the stiff skeleton arch bridge, a hanging and walking system is hung on the top surface of the stiff skeleton arch bridge, and a hanging basket bottom die system crawl along the arch by virtue of the hanging and walking system; the construction mode that bottom die hanging baskets are poured section by section is adopted for full-bridge outer wrapped concrete pouring construction, the number of needed bottom dies is small, and the material cost is greatly saved; after the stiff skeleton arch bridge is installed, the hanging basket bottom die system is independently installed, the hoisting weight of the stiff skeleton is reduced, the cable crane cost is reduced, and the hoisting safety is also improved; and after the encased concrete construction is completed, the suspension and walking system and the hanging basket bottom die system are removed back to the arch foot position of the stiff skeleton arch bridge, and the safety risk of high-altitude removal is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of bridge engineering, and in particular to a method for pouring concrete using a hanging basket for a rigid skeleton arch bridge. Background Art

[0002] With the continuous construction of railways and highways in mountainous areas, especially across canyons, mountains and rivers, rigid skeleton concrete arch bridges are widely used in my country due to their advantages of high structural rigidity, good economy and strong spanning capacity. As the main load-bearing part of the rigid skeleton arch bridge, the pouring process of the arch ring concrete is the most complicated construction stage.

[0003] For arch bridges with rigid frames wrapped with concrete arch rings, the construction steps are: ① installation of the rigid frames, ② pouring of the arch ring wrapped with concrete using the rigid frames as load-bearing supports. To reduce the load on the rigid frames, the wrapped concrete is divided into three rings and constructed in sequence. The three rings are the bottom plate ring, the web plate ring, and the top plate ring.

[0004] The biggest difficulty in the above construction steps is the construction of the bottom plate ring. The reasons are: ① The rigid frame is a pure steel structure and the installation is relatively simple; ② When the bottom plate ring is constructed, there is no hanging basket platform on the rigid frame, which makes it difficult to place personnel and equipment; ③ When the web and top plates are constructed, the bottom plate is used as a hanging basket platform, which is convenient for personnel to operate.

[0005] In order to solve the problem of base plate construction, the existing construction technology is: the bottom formwork of the base plate is bundled with the rigid frame segment as a whole, hoisted together with the rigid frame, and the bottom formwork is fully laid on the entire bridge. After the arch ring construction is completed, the bottom formwork is removed piece by piece through the dismantling platform.

[0006] The above technology has some disadvantages: ① Because the installation and removal of the bottom formwork at high altitude is very troublesome and has high safety risks, the bottom formwork needs to be invested in the entire bridge and hoisted together with the rigid frame, but the cost of investing in the entire bridge is high; ② The bottom formwork is hoisted together with the rigid frame, which increases the hoisting weight of the rigid frame and increases the hoisting cost; ③ After the arch ring construction is completed, there is a high risk of dismantling the bottom formwork at high altitude.

[0007] In view of the above problems, the present invention provides a construction method with high safety and good economy. Summary of the invention

[0008] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a construction method for pouring concrete hanging basket on a rigid skeleton arch bridge. The technical solution adopted includes:

[0009] A method for pouring concrete in a hanging basket for a rigid skeleton arch bridge comprises the following steps:

[0010] S1. Install a suspension and walking system and a hanging basket bottom mold system at the arch foot position of the rigid skeleton arch bridge, wherein the suspension and walking system can walk along the rigid skeleton arch bridge, and the hanging basket bottom mold system is suspended below the suspension and walking system and is located below the bottom plate of the rigid skeleton arch bridge;

[0011] S2, the suspension and walking system hoisting basket bottom formwork system walks to the working section on the rigid skeleton arch bridge;

[0012] S3, the suspension and walking system hoisting basket bottom formwork system moves from the beginning to the end of the working section, and pours concrete during the walking process until the bottom plate arch ring pouring construction of the rigid skeleton arch bridge is completed;

[0013] S4, the suspension and walking system hoisting basket bottom formwork system is returned to the beginning of the working section, and then it moves from the beginning to the end of the working section, and concrete is poured during the walking process until the web arch ring pouring construction of the rigid skeleton arch bridge is completed;

[0014] S5, the suspension and walking system hoisting basket bottom formwork system is returned to the beginning of the working section, and then it moves from the beginning to the end of the working section, and concrete is poured during the walking process until the top plate arch ring pouring construction of the rigid skeleton arch bridge is completed;

[0015] S6. The bottom formwork system of the hoisting basket of the suspension and traveling system is returned to the arch foot position of the rigid skeleton arch bridge. The bottom formwork system of the hanging basket is first removed, and then the suspension and traveling system is removed.

[0016] According to an embodiment of the present invention, a method for pouring concrete using a hanging basket for a rigid skeleton arch bridge is used, in which the rigid skeleton arch bridge is divided into a plurality of operating sections, and each operating section is provided with a suspension and walking system and a hanging basket bottom formwork system. Each suspension and walking system and a hanging basket bottom formwork system is installed at the arch foot position of the rigid skeleton arch bridge and then moves to a corresponding position. Each suspension and walking system and a hanging basket bottom formwork system is returned to the arch foot position of the rigid skeleton arch bridge for removal.

[0017] According to a method for pouring concrete in a hanging basket for a rigid skeleton arch bridge according to an embodiment of the present invention, the suspension and travel system is hinged to the hanging basket bottom formwork system.

[0018] According to an embodiment of the present invention, a method for pouring concrete on a rigid skeleton arch bridge using a hanging basket is provided, wherein a sling is connected between the suspension and travel system and the hanging basket bottom formwork system, and the two ends of the sling are respectively hinged to the hanging basket suspension and travel system and the hanging basket bottom formwork system.

[0019] According to a method for pouring concrete hanging basket on a rigid skeleton arch bridge according to an embodiment of the present invention, the suspension and travel system includes an arch climbing travel trolley.

[0020] According to an embodiment of the present invention, a construction method for pouring concrete in a hanging basket for a rigid skeleton arch bridge is provided, wherein the hanging basket bottom formwork system includes a hanging basket platform and a bottom formwork.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The invention provides a construction method for hanging basket casting of external concrete of a rigid skeleton arch bridge, wherein a separate bottom mold for external concrete casting is used, which is in the form of an independent hanging basket and is not bundled with the rigid skeleton arch bridge for hoisting; a suspension and walking system is suspended on the top surface of the rigid skeleton arch bridge; the suspension and walking system is a self-propelled system and can walk along the rigid skeleton arch bridge; the hanging basket bottom mold system relies on the suspension and walking system to realize crawling along the arch; the external concrete casting construction of the whole bridge adopts the construction form of casting the bottom mold hanging basket section by section, and the required number of bottom molds is small, which greatly saves the material cost; after the rigid skeleton arch bridge is installed, the hanging basket bottom mold system is installed separately, which reduces the hoisting weight of the rigid skeleton, reduces the cable hoisting cost, and also improves the hoisting safety; after the external concrete construction is completed, the dismantling of the suspension and walking system and the hanging basket bottom mold system is also returned to the arch foot position of the rigid skeleton arch bridge to reduce the safety risk of high-altitude dismantling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 It is a schematic diagram of the rigid skeleton arch bridge structure;

[0025] Figure 2 This is the cross-section of the arch ring of a rigid skeleton arch bridge;

[0026] Figure 3 Schematic diagram of the construction method for pouring concrete on the outer surface of a rigid skeleton arch bridge in an embodiment of the present invention Figure 1 ;

[0027] Figure 4 Schematic diagram of the construction method for pouring concrete on the outer surface of a rigid skeleton arch bridge in an embodiment of the present invention Figure 1 ;;

[0028] Figure 5 Schematic diagram of the construction method for pouring concrete on the outer surface of a rigid skeleton arch bridge in an embodiment of the present invention Figure 1 ;;

[0029] Figure 6 Schematic diagram of the construction method for pouring concrete on the outer surface of a rigid skeleton arch bridge in an embodiment of the present invention Figure 1 ;

[0030] Figure 7This is a schematic diagram of the installation of the suspension and walking system and the bottom mold system of the hanging basket in the embodiment of the present invention;

[0031] Figure 8 This is an installation cross-sectional view of the suspension and walking system and the bottom mold system of the hanging basket in the embodiment of the present invention;

[0032] Fig. 9 It is a cross-sectional view of the suspension and walking system and the bottom mold system of the hanging basket in the bottom plate casting state in the embodiment of the application of the present invention.

[0033] Description of main component symbols:

[0034] 10. Rigid skeleton arch bridge; 11. Bottom plate; 12. Web plate; 13. Top plate; 20. Suspension and travel system; 21. Arch climbing travel trolley; 30. Hanging basket bottom formwork system; 31. Hanging basket platform; 32. Bottom formwork; 40. Suspension strap. DETAILED DESCRIPTION

[0035] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0036] In the description of the present invention, the meaning of "above", "below", "exceed", etc. is not inclusive of the number itself, and the meaning of "above", "below", "within", etc. is inclusive of the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present invention.

[0038] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0039] Example

[0040] The present invention provides a method for pouring concrete in a hanging basket on a rigid skeleton arch bridge. Figures 3 to 9 As shown, the following steps are included:

[0041] S1, installing a suspension and walking system 20 and a hanging basket bottom mold system 30 at the arch foot position of the rigid skeleton arch bridge 10, wherein the suspension and walking system 20 includes an arch climbing walking trolley 21, and the hanging basket bottom mold system 30 includes a hanging basket platform 31 and a bottom mold 32; the suspension and walking system 20 can travel along the rigid skeleton arch bridge 10, and the hanging basket bottom mold system 30 is suspended below the suspension and walking system 20 and is located below the bottom plate 11 of the rigid skeleton arch bridge 10;

[0042] S2, the suspension and walking system 20 hoists the hanging basket bottom formwork system 30 and walks to the working section on the rigid skeleton arch bridge 10;

[0043] S3, the hanging and walking system 20 hoisting basket bottom formwork system 30 walks from the beginning to the end of the working section, and pours concrete during the walking process until the arch ring pouring construction of the bottom plate 11 of the rigid skeleton arch bridge 10 is completed;

[0044] S4, the suspension and walking system 20 hoisting basket bottom formwork system 30 back to the beginning of the working section, and then walks from the beginning of the working section to the end, and pours concrete during the walking process until the arch ring pouring construction of the web 12 of the rigid skeleton arch bridge 10 is completed;

[0045] S5, the suspension and walking system 20 hoisting basket bottom formwork system 30 is returned to the beginning of the working section, and then it is walked from the beginning of the working section to the end, and concrete is poured during the walking process until the top plate 13 arch ring pouring construction of the rigid skeleton arch bridge 10 is completed;

[0046] S6. The hanging basket bottom formwork system 30 of the suspension and traveling system 20 is hoisted and returned to the arch foot position of the rigid skeleton arch bridge 10. The hanging basket bottom formwork system 30 is first dismantled, and then the hanging basket bottom formwork system 30 is dismantled.

[0047] The casting bottom formwork 32 of the present invention adopts a separate bottom formwork, which is in the form of an independent hanging basket and is not tied to the rigid skeleton arch bridge 10 for hoisting. The suspension and walking system 20 is suspended on the top surface of the rigid skeleton arch bridge 10 and can walk along the rigid skeleton arch bridge 10. The installation and removal of the suspension and walking system 20 and the hanging basket bottom formwork system 30 are also carried out at the arch foot position of the rigid skeleton arch bridge 10. When constructing a certain working section of the rigid skeleton arch bridge 10, first climb to the bottom (i.e., the starting end) of the working section (such as Figure 3As shown in FIG. 1 , workers start pouring concrete on the bottom plate 11 of this working section on the hanging basket bottom formwork system 30. As the pouring progresses, the hanging basket bottom formwork system 30 climbs from low to high along the rigid skeleton arch bridge 10, from the beginning of the working section to the end of the working section, until the arch ring pouring construction of the bottom plate 11 of the rigid skeleton arch bridge 10 is completed (as shown in FIG. 1 ). Fig. 9 Then, the bottom mold system 30 of the hanging basket is retracted to the bottom of the working section (as shown in Figure 4 As shown in FIG. 1 , workers begin to pour concrete on the web 12 of this working section on the hanging basket bottom formwork system 30. As the pouring progresses, the hanging basket bottom formwork system 30 climbs from low to high along the rigid skeleton arch bridge 10, from the beginning of the working section to the end of the working section, until the arch ring pouring construction of the web 12 of the rigid skeleton arch bridge 10 is completed; then, the hanging basket bottom formwork system 30 retreats to the bottom of the working section (as shown in FIG. 1 ). Figure 5 As shown in the figure, workers begin to pour concrete on the top plate 13 of this working section on the hanging basket bottom formwork system 30. As the pouring proceeds, the hanging basket bottom formwork system 30 climbs from low to high along the rigid skeleton arch bridge 10, from the beginning of the working section to the end of the working section, until the arch ring pouring construction of the top plate 13 of the rigid skeleton arch bridge 10 is completed. At this point, the outsourcing concrete work of this working section in the rigid skeleton arch bridge 10 is completed.

[0048] In addition, in the present invention, the rigid skeleton arch bridge 10 is divided into a plurality of working sections, and each working section is allocated with a suspension and walking system 20 and a hanging basket bottom formwork system 30. Each suspension and walking system 20 and a hanging basket bottom formwork system 30 are installed from the arch foot position of the rigid skeleton arch bridge 10 and then walked to the beginning of the corresponding working section. After the cycle pouring of the bottom plate 11-web plate 12-top plate 13, the full bridge outsourcing concrete construction work of the full working section of the rigid skeleton arch bridge 10 is completed (such as Figure 6 As shown), then, each suspension and walking system 20 and the hanging basket bottom mold system 30 are returned to the arch foot position of the rigid skeleton arch bridge 10 for removal.

[0049] In some other embodiments of the present invention, Figure 7 , 8 As shown in Figures 9 and 10, the suspension and travel system 20 is hinged to the basket bottom mold system 30. Since the rigid skeleton arch bridge 10 is arched, the hinged connection between the suspension and travel system 20 and the basket bottom mold system 30 makes the two more flexible and will not be stiffly blocked during the crawling process along the arch. Specifically, a sling 40 is connected between the suspension and travel system 20 and the basket bottom mold system 30, and the two ends of the sling 40 are respectively hinged to the basket suspension and travel system 20 and the basket bottom mold system 30.

[0050] In the prior art, the concrete outsourcing operation of the rigid frame arch bridge 10 is a full-bottom formwork and full-bridge investment method. The bottom formwork is hoisted together with the rigid frame. After the arch ring construction is completed, the bottom formwork needs to be dismantled at high altitude; there is no self-propelled mechanism and no suspension system; the outer side hanging basket platform of the top plate 13 uses the bottom formwork hanging basket platform, and the height difference between the top plate 13 and the bottom formwork is large, which makes the operation inconvenient. The present invention discloses a method for pouring concrete using a hanging basket for an arch bridge with a rigid skeleton. The hanging and walking system 20 is a self-propelled system. The hanging basket bottom formwork system 30 relies on the hanging and walking system 20 to crawl along the arch. The construction method of pouring the bottom formwork hanging basket section by section is adopted. A small number of bottom forms 32 are required. In the embodiment, only 6 sections of the bottom formwork 32 are required, which greatly saves material costs. After the rigid skeleton arch bridge 10 is installed, the hanging basket bottom formwork system 30 is installed separately to reduce the hoisting weight of the rigid skeleton, reduce the cable hoisting cost, and improve the hoisting safety. After the construction of the external concrete is completed, the hanging basket bottom formwork system 30 is returned to the arch foot for dismantling, which reduces the safety risk of high-altitude dismantling.

[0051] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A method for pouring concrete in a hanging basket for a rigid skeleton arch bridge, characterized in that: The following steps are included: S1, installing a suspension and walking system (20) and a hanging basket bottom mold system (30) at the arch foot position of the rigid skeleton arch bridge (10), wherein the suspension and walking system (20) can move along the rigid skeleton arch bridge (10), and the hanging basket bottom mold system (30) is suspended below the suspension and walking system (20) and is located below the bottom plate (11) of the rigid skeleton arch bridge (10); S2, the suspension and travel system (20) hoists the hanging basket bottom formwork system (30) and travels to the working section on the rigid skeleton arch bridge (10); S3, the hanging and walking system (20) hoists the hanging basket bottom formwork system (30) and walks from the beginning to the end of the operation section, and pours concrete during the walking process until the pouring construction of the arch ring of the bottom plate (11) of the rigid skeleton arch bridge (10) is completed; S4, the hanging and walking system (20) hoists the hanging basket bottom formwork system (30) back to the beginning of the working section, and then walks from the beginning to the end of the working section, and pours concrete during the walking process until the pouring construction of the arch ring of the web (12) of the rigid skeleton arch bridge (10) is completed; S5, the hanging and walking system (20) hoists the bottom formwork system (30) of the hanging basket and returns it to the beginning of the working section, and then walks from the beginning of the working section to the end, and pours concrete during the walking process until the pouring construction of the arch ring of the top plate (13) of the rigid skeleton arch bridge (10) is completed; S6, the suspension and traveling system (20) hoists the hanging basket bottom formwork system (30) back to the arch foot position of the rigid skeleton arch bridge (10), first dismantles the hanging basket bottom formwork system (30), and then dismantles the suspension and traveling system (20).

2. The method for pouring concrete using a hanging basket for a rigid skeleton arch bridge according to claim 1 is characterized in that: The rigid skeleton arch bridge (10) is divided into a plurality of operation sections, each of which is allocated with a suspension and travel system (20) and a hanging basket bottom mold system (30). Each suspension and travel system (20) and a hanging basket bottom mold system (30) are installed at the arch foot position of the rigid skeleton arch bridge (10) and then travel to a corresponding position. Each suspension and travel system (20) and a hanging basket bottom mold system (30) are returned to the arch foot position of the rigid skeleton arch bridge (10) for removal.

3. The method for pouring concrete using a hanging basket for a rigid skeleton arch bridge according to claim 1 is characterized in that: The suspension and travel system (20) is hinged to the hanging basket bottom mold system (30).

4. The method for pouring concrete using a hanging basket for a rigid skeleton arch bridge according to claim 3 is characterized in that: A sling (40) is connected between the suspension and travel system (20) and the basket bottom mold system (30), and two ends of the sling (40) are respectively hinged to the basket suspension and travel system (20) and the basket bottom mold system (30).

5. The method for pouring concrete using a hanging basket for a rigid skeleton arch bridge according to claim 1 is characterized in that: The suspension and travel system (20) comprises a climbing arch travel trolley (21).

6. The method for pouring concrete using a hanging basket for a rigid skeleton arch bridge according to claim 1 is characterized in that: The hanging basket bottom mold system (30) comprises a hanging basket platform (31) and a bottom mold (32).

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