Porous simply supported beam cast-in-place rapid construction mechanism in soft soil area

Abstract

The utility model discloses a kind of soft soil area porous simply supported beam cast-in-place quick construction mechanism, the mechanism includes cast-in-place support, middle support and end support, the middle and end of the cast-in-place support are supported respectively by the middle support and the end support, two groups are relatively longitudinally provided in the middle support, and each group of the middle support includes first steel pipe pile and first sand box, the bottom of the first steel pipe pile is connected by first flange with first steel pipe pile adjusting section, top is supported in the middle of the cast-in-place support by the first sand box, the first steel pipe pile adjusting section is installed on the strip foundation on the top of support drill hole pile, and the two first steel pipe piles between being relatively longitudinally arranged are connected by connecting system connection.The utility model has the advantages that: support drill hole pile and strip foundation can be adapted to soft soil area;Cast-in-place support, middle support and end support are all detachable design, and the rapid pouring of cast-in-place beam is realized.

Description

Technical Field

[0001] This utility model relates to the technical field of simply supported beam construction, and in particular to a rapid construction mechanism for cast-in-place multi-hole simply supported beams in soft soil areas. Background Technology

[0002] Simply supported beam construction can employ precast erection, precast assembly, and in-situ casting. Precast erection involves prefabricating complete simply supported beams in a factory or prefabrication yard, transporting them to the construction site using equipment such as flatbed trucks, and then directly hoisting them onto piers or supports using bridge erecting machines or cranes for positioning and fixation. Precast assembly involves dividing the beam into segments (such as box girder segments), prefabricating them in a factory, transporting them to the site, and connecting them segment by segment using temporary supports or cantilever assembly techniques. Segments are fixed together using prestressed steel strands, adhesive bonding, or bolts to ultimately form a monolithic beam. In-situ casting involves directly erecting supports and formwork at the bridge site, tying reinforcing bars, pouring concrete on-site, and curing to form the beam. The supports must bear the beam's own weight and construction loads and are dismantled after completion. For non-large-span bridges in soft soil areas, in-situ casting is generally used, but how to achieve rapid installation of supports and formwork is a pressing issue that needs to be addressed. Summary of the Invention

[0003] The purpose of this utility model is to provide a rapid construction mechanism for cast-in-place multi-hole simply supported beams in soft soil areas, addressing the shortcomings of the prior art. This mechanism consists of a cast-in-place support, a middle support, and end supports. All three supports are designed to be detachable. After the cast-in-place beam of the current span of the bridge is cast, the cast-in-place support, the middle support, and the end supports can be installed on other spans of the bridge to facilitate the subsequent casting of cast-in-place beams.

[0004] The objective of this utility model is achieved through the following technical solution: A rapid construction mechanism for cast-in-place simply supported beams in soft soil areas is disclosed. The mechanism includes a cast-in-place support, a middle support, and end supports. The middle and end parts of the cast-in-place support are supported by the middle support and the end supports, respectively. Two sets of middle supports are arranged longitudinally. Each set of middle supports includes a first steel pipe pile and a first sand box. The bottom of the first steel pipe pile is connected to the first steel pipe pile adjustment section through a first flange, and the top is supported in the middle of the cast-in-place support through the first sand box. The first steel pipe pile adjustment section is installed on a strip foundation at the top of the drilled pile of the support. The two first steel pipe piles arranged longitudinally are connected by a connecting system.

[0005] The top of the strip foundation is provided with a first connecting steel plate, which is connected to the first pre-embedded steel bar inside the strip foundation. The first steel pipe pile adjustment section is welded to the first connecting steel plate and connected to the first connecting steel plate through the first reinforcing rib.

[0006] The connecting system is connected to the first steel pipe pile adjustment section by a clamp.

[0007] The end support includes a second steel pipe pile, a second sand box, and a crossbar. The bottom of the second steel pipe pile is connected to the pier cap through a second steel pipe pile adjustment section, and the top is supported at the end of the cast-in-place support through the second sand box and connected to the pier column through the crossbar.

[0008] The top of the pier is provided with a second connecting steel plate, which is connected to the second pre-embedded steel bar inside the pier. The second steel pipe pile adjustment section is welded to the second connecting steel plate and connected to the second connecting steel plate through a second reinforcing rib. The second steel pipe pile adjustment section and the second steel pipe pile are connected through a second flange.

[0009] The top of the pier is provided with a third connecting steel plate, which is connected to the third pre-embedded steel bar inside the pier, and the crossbar is connected to the third connecting steel plate.

[0010] The advantages of this utility model are: 1. The use of bored piles and strip foundations with supports makes it suitable for soft soil areas; 2. The cast-in-place supports, middle supports, and end supports are all designed to be detachable, enabling rapid casting of the cast-in-place beams. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the rapid construction mechanism for cast-in-place multi-hole simply supported beams in soft soil areas according to this utility model; Figure 2 This is a schematic diagram showing the connection between the first steel pipe pile and the first steel pipe pile adjustment section of this utility model; Figure 3 This is a schematic diagram of the connection between the first steel pipe pile and the connecting system of this utility model; Figure 4 This is a schematic diagram showing the connection between the second steel pipe pile and the second steel pipe pile adjustment section of this utility model; Figure 5 This is a schematic diagram of the connection between the second steel pipe pile and the crossbar of this utility model; Figure 6 This is a schematic diagram of step S1 of the construction method of the rapid construction mechanism for cast-in-place multi-hole simply supported beams in soft soil areas according to this utility model. Figure 7 This is a schematic diagram of step S2 of the construction method for the rapid construction mechanism for cast-in-place multi-hole simply supported beams in soft soil areas according to this utility model. Figure 8 This is a schematic diagram of step S3 of the construction method for the rapid construction mechanism for cast-in-place multi-hole simply supported beams in soft soil areas according to this utility model. Figure 9This is a schematic diagram of step S4 of the construction method for the rapid construction mechanism for cast-in-place multi-hole simply supported beams in soft soil areas according to this utility model. like Figures 1-9 As shown in the figure, the markings represent: Cast-in-place support 10, middle support 20, first steel pipe pile 201, first sand box 202, connecting system 203, end support 30, second steel pipe pile 301, second sand box 302, crossbar 303, support drilled pile 40, strip foundation 50, first connecting steel plate 501, first embedded steel bar 502, first steel pipe pile adjustment section 60, first reinforcing rib 70, first flange 80, clamp 90, pile cap 100, second connecting steel plate 1001, second embedded steel bar 1002, pier column 110, third connecting steel plate 1101, third embedded steel bar 1102, second steel pipe pile adjustment section 120, second reinforcing rib 130, main structure drilled pile 140, cast-in-place beam side formwork 150, second flange 160, cast-in-place beam reinforcement 170. Detailed Implementation

[0012] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art: Example: Figures 1-5 As shown, this embodiment relates to a rapid construction mechanism for cast-in-place simply supported beams in soft soil areas. The mechanism mainly includes a cast-in-place support 10, a middle support 20, and end supports 30. The middle and end portions of the cast-in-place support 10 are supported by the middle support 20 and end supports 30, respectively. Two sets of middle supports 20 are arranged longitudinally. Each set of middle supports 20 includes a first steel pipe pile 201 and a first sand box 202. The bottom of the first steel pipe pile 201 is connected to a first steel pipe pile adjustment section 60 via a first flange 80, and the top is supported in the middle of the cast-in-place support 10 via the first sand box 202. The first steel pipe pile adjustment section 60 is installed on a strip foundation 50 at the top of the support drilled pile 40. The use of the support drilled pile 40 and strip foundation 50 is suitable for soft soil areas. The two longitudinally arranged first steel pipe piles 201 are connected by a connecting system 203. The top of the strip foundation 50 is provided with a first connecting steel plate 501, which is connected to the first pre-embedded steel bar 502 inside the strip foundation 50. The first steel pipe pile adjustment section 60 is welded to the first connecting steel plate 501 and is also welded to the first connecting steel plate 501 through a first reinforcing rib 70, which is arranged circumferentially along the first steel pipe pile adjustment section 60. The connecting system 203 is connected to the first steel pipe pile adjustment section 60 through a clamp 90.

[0013] like Figures 1-5As shown, the end support 30 includes a second steel pipe pile 301, a second sand box 302, and a crossbar 303. The bottom of the second steel pipe pile 301 is connected to the foundation 100 via a second steel pipe pile adjustment section 120, and the top is supported at the end of the cast-in-place support 10 via the second sand box 302 and connected to the pier column 110 via the crossbar 303. The foundation 100 is connected to the main structure bored pile 140, and the pier column 110 is installed on the foundation 100. The top of the foundation 100 is provided with a second connecting steel plate 1001, which is connected to the second pre-embedded steel bar 1002 inside the foundation 100. The second steel pipe pile adjustment section 120 is welded to the second connecting steel plate 1001 and is also welded to the second connecting steel plate 1001 via a second reinforcing rib 130. The second reinforcing rib 130 is arranged circumferentially along the second steel pipe pile adjustment section 120. The second steel pipe pile adjustment section 120 and the second steel pipe pile 301 are connected via a second flange 160. The top of the pier 110 is provided with a third connecting steel plate 1101, which is connected to the third pre-embedded steel bar 1102 inside the pier 110. The crossbar 303 is connected to the third connecting steel plate 1101.

[0014] As can be seen from the above, the cast-in-place support 10, the middle support 20 and the end support 30 are all designed to be detachable. After the cast-in-place beam of the current span of the bridge is cast, the cast-in-place support 10, the middle support 20 and the end support 30 can be installed to other spans of the bridge to facilitate the subsequent casting of cast-in-place beams.

[0015] like Figures 1-9 As shown, this embodiment has the following construction method: S1: As Figure 6 As shown, the main construction structure includes 140 bored piles, 100 pile caps, and 110 piers. The construction support system includes 40 bored piles, 50 strip foundations, and the first steel pipe pile adjustment section 60. The first to fourth span support structures are assembled (cast-in-place support 10, middle support 20, and end support 30).

[0016] S2: As Figure 7 As shown, install the bottom formwork for spans 1-3 of the cast-in-place beam. Install the side formwork 150mm and the inner formwork for span 1 of the cast-in-place beam, and tie the reinforcing bars 170mm for span 1 of the cast-in-place beam. Pour the concrete for span 1 of the cast-in-place beam and cure it, then tie the reinforcing bars 170mm for span 2 of the cast-in-place beam.

[0017] S3: As Figure 8 As shown, the first span of the cast-in-place beam is demolded. The side formwork of the cast-in-place beam is moved longitudinally by 150 mm, and the inner formwork of the cast-in-place beam is moved longitudinally to the second span after shrinkage (the longitudinal movement can be carried out using a side formwork transport vehicle and an inner formwork transport vehicle). The concrete for the second span of the cast-in-place beam is poured and cured, and the reinforcing bars for the third span of the cast-in-place beam are tied by 170 mm.

[0018] S4: As Figure 9As shown, the second span of the cast-in-place beam is demolded. The side formwork of the cast-in-place beam is moved longitudinally by 150 mm, and the inner formwork shrinks before being moved longitudinally to the third span. The concrete for the third span of the cast-in-place beam is poured and cured. The bottom formwork and support structure (cast-in-place support 10, middle support 20, and end support 30) of the first span of the cast-in-place beam are removed, and the bottom formwork and support structure of the first span are transported to the fifth span. The above steps are repeated until all cast-in-place beams are poured.

[0019] The beneficial technical effects of this embodiment are as follows: 1. The use of bored piles and strip foundations with supports makes it suitable for soft soil areas; 2. The cast-in-place supports, middle supports, and end supports are all designed to be detachable, enabling rapid casting of the cast-in-place beams.

[0020] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A rapid construction mechanism for cast-in-place multi-hole simply supported beams in soft soil areas, characterized in that... The mechanism includes a cast-in-place support, a middle support, and an end support. The middle and end parts of the cast-in-place support are supported by the middle support and the end support, respectively. The middle support is arranged in two sets in a relatively longitudinal direction. Each set of the middle support includes a first steel pipe pile and a first sand box. The bottom of the first steel pipe pile is connected to the first steel pipe pile adjustment section through a first flange, and the top is supported in the middle of the cast-in-place support through the first sand box. The first steel pipe pile adjustment section is installed on the strip foundation at the top of the drilled pile of the support. The two first steel pipe piles arranged in a relatively longitudinal direction are connected by a connecting system.

2. The rapid construction mechanism for cast-in-place multi-hole simply supported beams in soft soil areas as described in claim 1, characterized in that... The top of the strip foundation is provided with a first connecting steel plate, which is connected to the first pre-embedded steel bar inside the strip foundation. The first steel pipe pile adjustment section is welded to the first connecting steel plate and connected to the first connecting steel plate through the first reinforcing rib.

3. The rapid construction mechanism for cast-in-place multi-hole simply supported beams in soft soil areas as described in claim 1, characterized in that... The connecting system is connected to the first steel pipe pile adjustment section by a clamp.

4. The rapid construction mechanism for cast-in-place multi-hole simply supported beams in soft soil areas as described in claim 1, characterized in that... The end support includes a second steel pipe pile, a second sand box, and a crossbar. The bottom of the second steel pipe pile is connected to the pier cap through a second steel pipe pile adjustment section, and the top is supported at the end of the cast-in-place support through the second sand box and connected to the pier column through the crossbar.

5. The rapid construction mechanism for cast-in-place multi-hole simply supported beams in soft soil areas as described in claim 4, characterized in that... The top of the pier is provided with a second connecting steel plate, which is connected to the second pre-embedded steel bar inside the pier. The second steel pipe pile adjustment section is welded to the second connecting steel plate and connected to the second connecting steel plate through a second reinforcing rib. The second steel pipe pile adjustment section and the second steel pipe pile are connected through a second flange.

6. The rapid construction mechanism for cast-in-place multi-hole simply supported beams in soft soil areas as described in claim 4, characterized in that... The top of the pier is provided with a third connecting steel plate, which is connected to the third pre-embedded steel bar inside the pier, and the crossbar is connected to the third connecting steel plate.

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