Bridge structure suitable for V-shaped valley

Abstract

The utility model provides a bridge structure suitable for a V-shaped valley, which relates to the technical field of bridge engineering, and is characterized in that a ground anchor type bridge is positioned above the V-shaped valley and between tunnels, cantilever beams are reliably connected to a rock stratum of the valley through connecting members, and two side ends of a mid-span bridge are respectively connected to supports of the two cantilever beams, so that the bridge structure is formed. The method has the advantages that a bridge substructure is not needed, construction is convenient, safe and efficient, and the technical problems that in the prior art, a bridge construction substructure is prone to disturbing a soil structure of a mountainous area, and unpredictable risks are caused are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a bridge structure suitable for V-shaped valleys. Background Art

[0002] With the rapid development of my country's economy and the gradual improvement of its highway network, mountainous areas with complex terrain, such as southwestern Zhejiang and Sichuan and Chongqing, have gradually become the focus of transportation construction. Highways typically use tunnels when crossing mountainous areas, and bridges when crossing valleys. Due to poor transportation conditions and limited construction capabilities in mountainous areas, conventional bridges often use prefabricated structures with spans under 50 meters, such as small box girders and T-beams.

[0003] In mountainous areas, the steep terrain and vertical slopes make high piers a common design feature, which undoubtedly increases construction difficulty and cost. Furthermore, the complex terrain makes it difficult for large construction machinery to access the site, severely restricting construction efficiency. Substructure construction can easily disturb the soil structure in the mountains, leading to unforeseen risks. Addressing the design and construction challenges of bridges in valleys, particularly V-shaped valleys, requires in-depth research. Utility Model Content

[0004] The purpose of the utility model is to provide a bridge structure suitable for V-shaped valleys, so as to alleviate the technical problem in the prior art that the substructure of bridge construction easily disturbs the soil structure in the mountainous area and causes unforeseen risks.

[0005] In a first aspect, the present invention provides a bridge structure suitable for use in a V-shaped valley, comprising: a ground-anchored bridge and a connecting member;

[0006] The ground-anchored bridge is located above the V-shaped valley, and the ground-anchored bridge is located between tunnels;

[0007] The ground-anchored bridge comprises a mid-span bridge and cantilever beams located on both sides of the mid-span bridge;

[0008] One end of the cantilever beam away from the mid-span bridge is connected to the rock formation in the valley through the connecting member;

[0009] The two cantilever beams are both provided with supports at one end close to the mid-span bridge, and the two side ends of the mid-span bridge are respectively connected to the supports of the two cantilever beams.

[0010] In an alternative embodiment,

[0011] The connecting member is configured as an anchor rod structure or a prestressed steel rod.

[0012] In an alternative embodiment,

[0013] When the connecting member is configured as an anchor rod structure, one end of the anchor rod structure is fixed in the rock layer of the V-shaped valley, and the other end of the anchor rod structure is cast together with the cantilever beam.

[0014] In an alternative embodiment,

[0015] The anchor rod structure includes an anchor rod body, an anchor rod pad and an anchor rod nut;

[0016] The rock formation is provided with an eyelet, the anchor plate cover is arranged at the opening of the eyelet, the anchor rod body passes through the anchor plate and extends into the eyelet, and the portion of the anchor rod body extending through the eyelet is provided with an anchor nut.

[0017] In an alternative embodiment,

[0018] The anchor structure also includes a grouting pipe and an exhaust pipe;

[0019] The grouting pipe passes through the anchor plate and extends into the eyelet, and the grouting pipe is used to transport mortar into the eyelet;

[0020] The exhaust pipe passes through the anchor rod pad and extends into the bottom of the eyelet.

[0021] In an alternative embodiment,

[0022] The tunnels include dark tunnels and open tunnels;

[0023] The two cantilever beams are respectively connected to the dark tunnel and the open tunnel.

[0024] After the construction of blind and open tunnels, the site is leveled at the junction of the bridge and the tunnel, and the unfavorable geological layers are removed until the valley rock layer is exposed;

[0025] A hole is formed in the rock formation, the anchor rod is rotated and inserted into the hole, and then mortar is poured into the hole;

[0026] The concrete is poured to form a cantilever beam, and the cantilever beam and the anchor rod body are poured together.

[0027] In an alternative embodiment,

[0028] The mid-span bridge is erected on the supports of the two cantilever beams.

[0029] Set up pad stones and supports at the position of the last segment of the cantilever beam, and install them at the cantilever beam support by hoisting, pushing or beam erection;

[0030] After the middle span bridge is erected on the supports of the two cantilever beams, the bridge deck paving and guardrail construction are carried out.

[0031] In an alternative embodiment,

[0032] The cantilever beam comprises concrete blocks which are concrete-formed in sequence.

[0033] In an alternative embodiment,

[0034] The rock layers of the V-shaped valley are arranged in a stepped shape.

[0035] In an alternative embodiment,

[0036] The mid-span bridge is configured as a hanging hole beam, and the hanging hole beam is configured as a steel box beam structure.

[0037] The bridge structure suitable for V-shaped valleys provided in this embodiment is formed by locating a ground-anchored bridge above the V-shaped valley and between tunnels, and reliably connecting the cantilever beams to the rock formations of the valley through connecting members, and connecting the two side ends of the mid-span bridge to the supports of the two cantilever beams respectively. This eliminates the need for a bridge substructure, and the construction is convenient, safe, and efficient. This alleviates the technical problem in the prior art that the substructure of bridge construction easily disturbs the soil structure in the mountainous area and causes unforeseen risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 A schematic diagram of the overall structure of a bridge structure suitable for V-shaped valleys provided by an embodiment of the utility model;

[0040] Figure 2 A schematic diagram of step 1 of the construction method for a bridge structure suitable for a V-shaped valley provided by an embodiment of the present invention;

[0041] Figure 3 A schematic diagram of step 2 of the construction method for a bridge structure suitable for a V-shaped valley provided by an embodiment of the present utility model;

[0042] Figure 4 A schematic diagram of step 3 of the construction method for a bridge structure suitable for a V-shaped valley provided by an embodiment of the present utility model;

[0043] Figure 5 A construction diagram of step 4 in the construction method of a bridge structure suitable for a V-shaped valley provided by an embodiment of the present utility model;

[0044] Figure 6 A schematic diagram of step 5 of the construction method for a bridge structure suitable for a V-shaped valley provided by an embodiment of the present invention;

[0045] Figure 7 A schematic diagram of step 6 of the construction method for a bridge structure suitable for a V-shaped valley provided by an embodiment of the present invention;

[0046] Figure 8 A schematic diagram of step 7 of the construction method for a bridge structure suitable for a V-shaped valley provided by an embodiment of the present invention;

[0047] Figure 9 A schematic diagram of step 8 of the construction method for a bridge structure suitable for a V-shaped valley provided by an embodiment of the present utility model;

[0048] Figure 10 A schematic structural diagram of an anchor rod structure in a bridge structure suitable for V-shaped valleys provided in an embodiment of the present utility model.

[0049] Icons: 1-V-shaped valley; 11-valley rock formation; 2-ground-anchored bridge; 21-cantilever beam; 210-block zero; 211-block one; 212-block two; 213-block three; 22-mid-span bridge; 23-prestressed beam; 31-blind tunnel; 32-open tunnel; 4-reinforced concrete cushion; 5-anchor structure; 51-anchor rod body; 52-anchor pad; 53-anchor nut; 54-grouting pipe; 55-exhaust pipe; 56-mortar; 6-hanging basket. DETAILED DESCRIPTION

[0050] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0051] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0053] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0054] like Figure 1 As shown, the bridge structure suitable for a V-shaped valley provided in this embodiment includes: a ground-anchored bridge 2 and connecting members; the ground-anchored bridge 2 is located above the V-shaped valley 1, and the ground-anchored bridge 2 is located between tunnels; the ground-anchored bridge 2 includes a mid-span bridge 22 and cantilever beams 21 located on both sides of the mid-span bridge 22; one end of the cantilever beam 21 away from the mid-span bridge 22 is connected to the rock formation of the valley through the connecting member; supports are provided at one end of the two cantilever beams close to the mid-span bridge 22, and both side ends of the mid-span bridge 22 are respectively connected to the supports of the two cantilever beams.

[0055] Specifically, the ground-anchored bridge 2 is located above the V-shaped valley 1 and between the tunnels; the ground-anchored bridge 2 includes cantilever beams 21 on both sides and a mid-span bridge 22. The cantilever beams 21 can use connecting members to reliably connect the beam ends of the cantilever beams 21 to the rock formations of the valley. In an optional embodiment, the connecting members are configured as anchor rod structures 5 or prestressed steel rods.

[0056] The middle span bridge 22 is a hanging hole beam, the beam end is located at the bracket support of the cantilever beam 21, and the middle span bridge 22 is a steel box beam structure.

[0057] Furthermore, both sides of the ground-anchored bridge 2 are directly connected to the tunnel, and the tunnel is divided into a dark tunnel 31 and an open tunnel 32.

[0058] Furthermore, the rock layer 11 of the V-shaped valley 1 has good geological conditions and strong strength and integrity. To ensure good stress resistance, the rock layer 11 of the V-shaped valley 1 is formed into a stepped shape.

[0059] In an optional embodiment, when the connecting member is set as an anchor structure 5, one end of the anchor structure 5 is fixed in the rock layer of the V-shaped valley 1, and the other end of the anchor structure 5 is cast together with the cantilever beam 21. The size and number of the anchor structure 5 are determined by calculation.

[0060] A corbel support is provided near the mid-span position of the cantilever beam 21, and the mid-span bridge 22 can be erected at the support of the cantilever beam 21 by hoisting, jacking or beam erection.

[0061] In an optional embodiment, if Figure 10 As shown, the anchor rod structure 5 includes an anchor rod body 51, an anchor rod pad 52 and an anchor rod nut 53; a hole is opened in the rock formation, and the anchor rod pad 52 is covered at the opening of the hole. The anchor rod body 51 passes through the anchor rod pad 52 and extends into the hole. The part of the anchor rod body 51 that passes through the hole is provided with an anchor rod nut 53, and the anchor rod body 51 is fixed by the cooperation of the anchor rod nut 53 and the anchor rod pad 52.

[0062] In an optional embodiment, the anchor rod structure 5 also includes a grouting pipe 54 and an exhaust pipe 55; the grouting pipe 54 passes through the anchor rod pad 52 and extends into the eyelet, and the grouting pipe 54 is used to transport mortar 56 into the eyelet, thereby realizing the pouring and fixing of the mortar 56 and the anchor rod body 51; the exhaust pipe 55 passes through the anchor rod pad 52 and extends into the bottom of the eyelet, so as to facilitate the discharge of air in the eyelet to avoid affecting the pouring quality.

[0063] The bridge structure suitable for V-shaped valleys provided in this embodiment is formed by positioning the ground-anchored bridge 2 above the V-shaped valley 1 and between the tunnels, with the cantilever beam 21 reliably connected to the rock formation of the valley through connecting components, and the two side ends of the mid-span bridge 22 are respectively connected to the supports of the two cantilever beams. This eliminates the need for a bridge substructure, and the construction is convenient, safe, and efficient. This alleviates the technical problem in the prior art that the substructure of the bridge construction easily disturbs the soil structure in the mountainous area and causes unforeseen risks.

[0064] Based on the above embodiment, the construction method of a bridge structure suitable for a V-shaped valley provided in this embodiment includes the following steps:

[0065] Step 1: If Figure 2 As shown, the construction of blind and open tunnels was carried out according to the normal mining method tunnel construction process, the construction and protection of the upper and lower steps of the tunnel entrance, the permanent side slope protection of the tunnel portal and the open tunnel were carried out to enhance the stability and safety of the structure, the site was leveled at the connection between the bridge and the tunnel, and the unfavorable geological layers were removed until the valley rock layer 11 was exposed.

[0066] An anchor rod is used to drill a hole at the position of block 0 210 of the designed ground-anchored bridge 2, and the anchor rod body 51 is sent into the hole while rotating, and mortar 56 is poured.

[0067] Step 2: If Figure 3As shown, the steel bars of the bridge block 0 210 are tied, and the prestressed corrugated pipe is embedded in accordance with the design requirements. The concrete of the block 0 210 is poured. After the strength, elastic modulus and age of the concrete meet the design requirements, the prestressed tendons 23 are tensioned.

[0068] Step 3: If Figure 4 As shown, the hanging basket 6 is assembled on the segment of block 0 210 .

[0069] Step 4: If Figure 5 As shown, the segmental steel bars of block No. 1 211 are tied, prestressed pipes are embedded, and concrete of block No. 1 211 is poured. After the strength, elastic modulus and age of the concrete meet the design requirements, the prestressed tendons 23 are tensioned.

[0070] Step 5: Figure 6 As shown, the above construction steps of the hanging basket 6 are repeated to form the second block 212 and the third block 213 until the last segment of the cantilever beam 21.

[0071] Step 6: Figure 7 As shown, in order to avoid stress concentration caused by excessive tension in the prestressed bundle 23 of the zero block 210, the zero block 210 can be divided into several parts according to the span of the bridge and the stress conditions, and cast in the later segment construction process.

[0072] Step 7: Figure 8 As shown, a reinforced concrete cushion layer 4 and a support are provided at the position of the last segment corbel of the cantilever beam 21 .

[0073] Step 8: Figure 9 As shown, it is erected at the support of the cantilever beam 21 by hoisting, pushing or beam erection.

[0074] After completing the above steps, the open hole structure construction will be carried out, and the construction of auxiliary structures such as bridge deck pavement and guardrails will be carried out.

[0075] The construction method of the bridge structure suitable for V-shaped valleys provided in this embodiment has the advantages of not requiring a bridge substructure, being convenient to construct, safe and efficient, and having significant economic benefits.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bridge structure suitable for V-shaped valleys, characterized in that: include: Ground-anchored bridges (2) and connecting members; The ground-anchored bridge (2) is located above the V-shaped valley (1), and the ground-anchored bridge (2) is located between tunnels; The ground-anchored bridge (2) comprises a mid-span bridge (22) and cantilever beams (21) located on both sides of the mid-span bridge (22); One end of the cantilever beam (21) away from the mid-span bridge (22) is connected to the rock formation of the valley through the connecting member; The two cantilever beams are both provided with supports at one end close to the mid-span bridge (22), and the two side ends of the mid-span bridge (22) are respectively connected to the supports of the two cantilever beams.

2. The bridge structure suitable for V-shaped valley according to claim 1, characterized in that: The connecting member is configured as an anchor rod structure (5) or a prestressed steel rod.

3. The bridge structure suitable for V-shaped valley according to claim 2, characterized in that: When the connecting member is configured as an anchor rod structure (5), one end of the anchor rod structure (5) is fixed in the rock layer of the V-shaped valley (1), and the other end of the anchor rod structure (5) is cast together with the cantilever beam (21).

4. The bridge structure suitable for V-shaped valley according to claim 3, characterized in that: The anchor rod structure (5) comprises an anchor rod body (51), an anchor rod pad (52) and an anchor rod nut (53); The rock formation is provided with an eyelet, the anchor rod pad (52) is covered at the opening of the eyelet, the anchor rod body (51) passes through the anchor rod pad (52) and extends into the eyelet, and the anchor rod body (51) is provided with an anchor nut (53) at the portion extending through the eyelet.

5. The bridge structure suitable for V-shaped valley according to claim 4, characterized in that: The anchor rod structure (5) further includes a grouting pipe (54) and an exhaust pipe (55); The grouting pipe (54) passes through the anchor plate (52) and extends into the eyelet, and the grouting pipe (54) is used to transport mortar (56) into the eyelet; The exhaust pipe (55) passes through the anchor rod pad (52) and extends into the bottom of the eyelet.

6. The bridge structure suitable for V-shaped valley according to claim 1, characterized in that: The tunnel includes a dark tunnel (31) and an open tunnel (32); The two cantilever beams (21) are respectively connected to the dark tunnel (31) and the open tunnel (32).

7. The bridge structure suitable for V-shaped valley according to claim 1, characterized in that: The mid-span bridge (22) is erected on the supports of the two cantilever beams (21).

8. The bridge structure suitable for V-shaped valley according to claim 1, characterized in that: The cantilever beam (21) comprises concrete blocks which are concrete-formed in sequence.

9. The bridge structure suitable for V-shaped valley according to claim 1, characterized in that: The rock layers of the V-shaped valley (1) are arranged in a stepped shape.

10. The bridge structure suitable for V-shaped valley according to claim 1, characterized in that: The mid-span bridge (22) is configured as a hanging hole beam, and the hanging hole beam is configured as a steel box beam structure.

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