Open-cut tunnel structure with driving tunnel and construction method

Abstract

The present application discloses a tunnel open-cut structure with a driving hole and a construction method. The tunnel open-cut structure with a driving hole comprises: a tunnel open-cut main body, a driving hole formed by a transverse opening on one side of the tunnel open-cut main body, the driving hole being an arched structure, one end of the driving hole being connected to the inner side of the tunnel open-cut main body and the other end being connected to the external space; a plurality of reinforcing ring beam assemblies are provided in the driving hole, and concrete is poured on the reinforcing ring beam assemblies. The present application achieves the technical effect of utilizing a transversely opened driving hole to construct a tunnel, thereby preventing tunnel construction and abutment construction from interfering with each other, improving construction efficiency, and shortening the construction period. This solves the problem in related technologies where, when abutments extend into the tunnel open-cut, abutment construction and construction within the tunnel interfere with each other, resulting in an extended construction period.

Description

Technical Field

[0001] The present application relates to the technical field of tunnel engineering, and in particular to an open-hole tunnel structure with a driving tunnel and a construction method. Background Art

[0002] With the continuous development of my country's highways and railways, tunnel engineering has become a necessary structural design in mountainous areas. When tunnels are connected to bridges, bridge-tunnel connection occurs, that is, the bridge beam extends into the tunnel open hole, causing the tunnel open hole lining and bridge abutment construction to affect each other, causing great trouble to the construction organization and construction period.

[0003] It often happens that during the construction of abutments, traffic in the tunnel is blocked and construction cannot be carried out, or the construction of abutments is shelved or delayed to ensure tunnel construction. Summary of the Invention

[0004] The main purpose of this application is to provide a tunnel open hole structure with a driving hole to solve the problem in the related art that when the abutment extends into the tunnel open hole, the abutment construction and the construction inside the tunnel interfere with each other, resulting in an extension of the construction period.

[0005] To achieve the above-mentioned object, the present application provides a tunnel open-type structure with a driving hole, the tunnel open-type structure with a driving hole comprising: a tunnel open-type main body, a driving hole formed by a transverse opening on one side of the tunnel open-type main body, the driving hole being an arched structure, one end of the driving hole communicating with the inner side of the tunnel open-type main body, and the other end communicating with an external space;

[0006] A plurality of reinforced ring beam assemblies are provided in the driving tunnel, and concrete is poured on the reinforced ring beam assemblies;

[0007] It also includes diagonal bracing steel bars, which are located on both sides of the driving tunnel and at the door foot of the driving tunnel. The diagonal bracing steel bars are fixedly connected to the corresponding reinforcing ring beam components.

[0008] Furthermore, the plurality of reinforcing ring beam assemblies are distributed in a manner of being nested in sequence from the inside to the outside, and a first spacing exists between adjacent reinforcing ring beam assemblies.

[0009] Furthermore, the reinforced ring beam assembly includes a first connecting section, a second connecting section and a third connecting section;

[0010] The first connecting section is configured to be arc-shaped, the curvature of the first connecting section matches the curvature of the inverted arch reinforcement of the tunnel open hole, and the first connecting section is distributed on both sides of the driving hole and is engaged with the inverted arch reinforcement;

[0011] The second connecting section is distributed at the lower part of the driving tunnel, and is arranged horizontally. Both ends of the second connecting section are fixedly connected to the lower ends of the first connecting sections on both sides respectively;

[0012] The third connecting section is distributed on the upper part of the driving tunnel. The third connecting section is configured to be arched. Both ends of the third connecting section are fixedly connected to the upper ends of the first connecting sections on both sides.

[0013] Furthermore, the lengths of the first connecting sections of the plurality of reinforced ring beam assemblies increase sequentially from the inside to the outside, and the radii and arc lengths of the third connecting sections of the plurality of reinforced ring beam assemblies increase sequentially from the inside to the outside.

[0014] Furthermore, the distribution direction of the third connection sections of the plurality of reinforced ring beam assemblies matches the curvature of the inverted arch reinforcement.

[0015] Furthermore, each of the reinforcing ring beam assemblies is arranged in a plurality along the opening direction of the driving tunnel, and there is a second spacing between the reinforcing ring beam assemblies distributed in the opening direction of the driving tunnel.

[0016] Furthermore, it also includes a first stirrup, a second stirrup, a third stirrup and a fourth stirrup, wherein the first stirrup and the second stirrup are arranged on the first connecting section on both sides, the third stirrup is arranged on the second connecting section, and the fourth stirrup is arranged on the third connecting section.

[0017] Furthermore, the inverted arch reinforcement located at the lower part of the driving tunnel extends upward to pass through the second connection section at the uppermost end and forms a reserved joint reinforcement.

[0018] Furthermore, it also includes a water stop strip embedded in the reinforcing ring beam steel bar assembly, and a portion of the water stop strip extends out of the reinforcing ring beam steel bar assembly toward the center line of the driving tunnel.

[0019] Furthermore, it also includes diagonal bracing steel bars, which are located on both sides of the driving tunnel and at the door foot of the driving tunnel, and the diagonal bracing steel bars are fixedly connected to the corresponding first connecting section and second connecting section.

[0020] According to another aspect of the present application, a construction method for a tunnel open-cut structure is provided, for forming a tunnel open-cut structure having a driving tunnel, comprising the following steps:

[0021] Arrange the inverted arch reinforcement of the main body of the tunnel;

[0022] Cut off the inverted arch steel bars at the side wall of the main body of the tunnel to form a driving tunnel;

[0023] Arrange several reinforced ring beam assemblies in the driving tunnel, and connect the reinforced ring beam assemblies with the inverted arch reinforcement;

[0024] Arrange the lining reinforcement of the main body of the tunnel;

[0025] Arrange the casting templates for the main body of the tunnel and the driving tunnel, and connect the casting templates for the driving tunnel with the casting templates for the main body of the tunnel;

[0026] Concrete is poured in the casting formwork to eventually form a tunnel open hole structure with a driving hole;

[0027] Before closing, both sides of the tunnel need to be roughened. During the roughening process, circumferential chiseling is performed along the contour of the tunnel. There is an angle of 10°-15° between the circumferential chiseling line and the edge of the tunnel structure, so that the tunnel opening after roughening has a structure with a larger outside and a smaller inside.

[0028] In an embodiment of the present application, a tunnel open hole main body is provided, and a horizontal opening is formed on one side of the tunnel open hole main body to form a driving hole. The driving hole is an arch structure, one end of the driving hole is connected to the inner side of the tunnel open hole main body, and the other end is connected to the external space; a plurality of reinforcing ring beam assemblies are provided in the driving hole, and concrete is poured on the reinforcing ring beam assemblies, so as to achieve the purpose of opening a driving hole horizontally on one side of the tunnel open hole main body, so that the driving hole is connected to the external driving lane, and vehicles can enter and exit the tunnel open hole through the driving hole, thereby realizing the technical effect of using the horizontally opened driving hole to construct the tunnel, so that the tunnel construction and the abutment construction do not interfere with each other, improve construction efficiency, and shorten the construction period, thereby solving the problem in the related technology that when the abutment extends into the tunnel open hole, the abutment construction and the construction in the tunnel interfere with each other, resulting in an extension of the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings that constitute part of this application are used to provide a further understanding of this application and make other features, objects and advantages of this application more apparent. The illustrative embodiment drawings of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings:

[0030] Figure 1 is a structural diagram according to an embodiment of the present application;

[0031] Figure 2 is a longitudinal cross-sectional view of an inverted beveled tunnel door according to an embodiment of the present application;

[0032] Figure 3 is a structural diagram of a reinforced ring beam assembly according to an embodiment of the present application;

[0033] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure of AA;

[0034] Figure 5It is a schematic diagram of roughening a driving hole according to an embodiment of the present application.

[0035] Among them, 1 is the main body of the tunnel, 2 is the driving tunnel, 3 is the reinforced ring beam assembly, 31 is the first connecting section, 32 is the second connecting section, 33 is the third connecting section, 34 is the first stirrup, 38 is the second stirrup, 35 is the third stirrup, 36 is the fourth stirrup, and 37 is the reserved joint steel bar. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0037] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, for the purposes of describing the embodiments of the present application herein.

[0038] In this application, the terms "upper," "lower," "inner," and the like indicate positions or locations based on those shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0039] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0040] Furthermore, the terms "disposed," "provided with," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0041] Additionally, the term "plurality" shall mean two or more.

[0042] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] When the tunnel and the bridge are connected, a bridge-tunnel connection occurs, that is, the bridge beam extends into the tunnel open hole, causing the tunnel open hole lining and the bridge abutment construction to affect each other, causing great trouble to the construction organization and construction period.

[0044] It often happens that during the construction of abutments, traffic in the tunnel is blocked and construction cannot be carried out, or the construction of abutments is shelved or delayed to ensure tunnel construction.

[0045] In order to solve the above technical problems, Figures 1 to 4 As shown, an embodiment of the present application provides a tunnel open hole structure having a driving hole 2, the tunnel open hole structure having the driving hole 2 comprising: a tunnel open hole body 1, a side of the tunnel open hole body 1 having a transverse opening to form the driving hole 2, the driving hole 2 being an arched structure, one end of the driving hole 2 being connected to the inner side of the tunnel open hole body 1, and the other end being connected to the external space;

[0046] A plurality of reinforced ring beam assemblies 3 are provided in the driving tunnel 2, and concrete is poured on the reinforced ring beam assemblies 3.

[0047] In this embodiment, a driving tunnel 2 is opened transversely on one side of the main body 1 of the tunnel hole, so that the driving tunnel 2 is connected to the external traffic lane, and vehicles can enter and exit the tunnel hole through the driving tunnel 2. In a construction environment where the abutment extends into the tunnel hole, the abutment cannot be normally used, so the driving tunnel 2 opened on the side of the main body 1 of the tunnel hole can be used as a route for vehicle traffic. The driving tunnel 2 ensures that the construction inside the tunnel hole will not be interrupted due to the broken bridge. In this embodiment, the driving tunnel 2 has the function of ensuring traffic flow, which can complete the lining construction of the tunnel hole at the entrance of the tunnel without delaying the construction inside the hole and the abutment construction. When the bridge is subsequently opened, it is only necessary to close the driving tunnel 2 separately. To ensure sufficient stability for the tunnel 2, this embodiment arranges several reinforcing ring beam assemblies 3 within the tunnel 2. The reinforcing ring beam assemblies 3 are composed of steel bars and form a ring-shaped structure. The overall configuration of the reinforcing ring beam assemblies 3 matches the shape of the tunnel 2. The reinforcing ring beam assemblies 3 ensure sufficient structural stability for the tunnel 2, and the concrete poured on the reinforcing ring beam assemblies 3 can be poured simultaneously with the concrete of the tunnel main body 1. Specifically, the reinforcing ring beam assemblies 3 can be arranged at a preset position when arranging the inverted arch reinforcement of the tunnel main body 1, and a portion of the inverted arch reinforcement is cut off to allow it to flow into the passage space of the tunnel 2. The lining reinforcement of the tunnel main body and the casting formwork for the tunnel main body and the tunnel 2 are then arranged. Concrete is poured within the casting formwork to directly form the tunnel main body 1 and the tunnel 2 structure.

[0048] like Figure 3As shown, the reinforced ring beam assembly 3 includes a first connecting section 31, a second connecting section 32 and a third connecting section 33; the first connecting section 31 is set to an arc shape, and the curvature of the first connecting section 31 matches the curvature of the inverted arch steel bar of the tunnel open hole. The first connecting section 31 is distributed on both sides of the driving hole 2 and is clamped with the inverted arch steel bar. The clamping method facilitates the pre-positioning of the first connecting section 31, and after pre-positioning, it can be spot-welded to the inverted arch steel bar; the second connecting section 32 is distributed at the lower part of the driving hole 2, the second connecting section 32 is horizontally arranged, and the two ends of the second connecting section 32 are respectively fixedly connected to the lower ends of the first connecting section 31 on both sides, and the length direction of the second connecting section 32 is along the bridge direction; the third connecting section 33 is distributed at the upper part of the driving hole 2, the third connecting section 33 is set to an arch shape, and the third connecting section 33 makes the finally formed driving hole 2 an arch structure, and the two ends of the third connecting section 33 are fixedly connected to the upper ends of the first connecting section 31 on both sides.

[0049] Because the thickness of the driving tunnel 2 needs to be consistent with that of the main tunnel body 1, and the structural stability needs to be improved by increasing the width of the concrete of the driving tunnel 2, in this embodiment, the plurality of reinforcing ring beam assemblies 3 are arranged in a sequentially nested manner from the inside to the outside, with a first spacing between adjacent reinforcing ring beam assemblies 3. To achieve this nested structure of reinforcing ring beam assemblies 3, the lengths of the first connecting segments 31 of the plurality of reinforcing ring beam assemblies 3 increase sequentially from the inside to the outside, and the radius and arc length of the third connecting segments 33 of the plurality of reinforcing ring beam assemblies 3 increase sequentially from the inside to the outside.

[0050] To ensure that the overall profile of the driving tunnel 2 matches that of the main tunnel opening 1, the third connecting segments 33 of the reinforcing ring beam assemblies 3 are arranged in a direction that matches the curvature of the inverted arch reinforcement. The third connecting segments 33 are not arranged vertically; instead, adjacent third connecting segments 33 are offset along the inverted arch reinforcement's arc, ensuring that the distribution of the third connecting segments 33 matches the direction of the inverted arch reinforcement.

[0051] like Figure 4 As shown, since the thickness of the driving tunnel 2 needs to be consistent with the thickness of the tunnel main body 1, each reinforcing ring beam assembly 3 is set in multiples along the opening direction of the driving tunnel 2, and there is a second spacing between the reinforcing ring beam assemblies 3 distributed in the opening direction of the driving tunnel 2.

[0052] In order to further enhance the structural strength of the reinforced ring beam assembly 3, the reinforced ring beam assembly 3 in this embodiment also includes a first stirrup 34, a second stirrup 38, a third stirrup 35 and a fourth stirrup 36. The first stirrup 34 and the second stirrup 38 are arranged on the first connecting section 31 on both sides, the third stirrup 35 is arranged on the second connecting section 32, and the fourth stirrup 36 is arranged on the third connecting section 33.

[0053] like Figure 3As shown, during the construction of the tunnel 2, a portion of the inverted arch rebar of the open-cut tunnel main body 1 needs to be cut. After the tunnel 2 is closed after construction, the cut inverted arch rebar needs to be connected before closure. To facilitate subsequent rebar connection, in this embodiment, the inverted arch rebar located at the lower portion of the tunnel 2 extends upward, passing through the uppermost second connecting section 32 and forming a reserved splice rebar 37. In other words, when the inverted arch rebar is cut, the inverted arch rebar located at the lower portion of the tunnel 2 is not completely cut to the lower surface of the tunnel 2. Instead, a portion of the inverted arch rebar is left to extend beyond the lower surface of the tunnel 2. This means that the upper end of the reserved splice rebar 37 extends beyond the driving surface of the tunnel 2. Before driving, the reserved splice rebar 37 needs to be bent or covered with steel plates to prevent the extended reserved splice rebar 37 from interfering with traffic. During closure, the presence of the reserved splice rebar 37 allows the subsequent rebar to connect with the existing rebar.

[0054] Since the concrete structure inside the closed tunnel 2 is a new concrete structure, joint water-stopping construction is required. For this reason, the tunnel 2 structure in this embodiment also includes a waterstop embedded in the reinforcing ring beam steel bar assembly, and part of the waterstop extends out of the reinforcing ring beam steel bar assembly toward the center line of the tunnel 2. After the tunnel 2 is poured, part of the waterstop will also extend to the inner surface of the tunnel 2. After the tunnel 2 is closed, the part of the waterstop that extends will be poured into the new concrete structure, thereby forming a joint water-stop structure.

[0055] In order to further improve the structural strength of the reinforced ring beam assembly 3, this embodiment also includes diagonal bracing steel bars, which are located on both sides of the driving tunnel 2 and at the door foot of the driving tunnel 2. The diagonal bracing steel bars are fixedly connected to the corresponding first connecting section 31 and the second connecting section 32.

[0056] According to another aspect of the present application, a construction method of a tunnel open hole structure having a driving hole 2 is provided, comprising the following steps:

[0057] Arrange the inverted arch reinforcement of the main body 1 of the tunnel;

[0058] Cut off the inverted arch steel bars at the side wall of the main body of the open tunnel 1 to form a driving tunnel 2;

[0059] Arrange a plurality of reinforcing ring beam assemblies 3 in the driving tunnel 2, and connect the reinforcing ring beam assemblies 3 with the inverted arch reinforcement;

[0060] Arrange the lining reinforcement of the tunnel main body 1, and reserve the opening structure corresponding to the driving tunnel 2 when arranging the lining reinforcement;

[0061] Arrange the casting templates for the tunnel main body 1 and the driving tunnel 2, and connect the casting templates for the driving tunnel 2 to the casting templates for the tunnel main body 1;

[0062] Concrete is poured in the casting formwork to eventually form a tunnel open hole structure with a driving hole 2.

[0063] like Figure 5 As shown, before closing the tunnel 2, both sides of the tunnel 2 need to be roughened. The roughening process is performed circumferentially along the contour of the tunnel 2. The circumferential roughening line forms an angle of 10°-15° with the structural edge of the tunnel 2. This creates a structure where the opening of the tunnel 2 is larger on the outside and smaller on the inside. This structure allows the newly poured concrete structure to better withstand the negative pressure generated by the train passing through the tunnel, improving the structural stability.

[0064] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A tunnel open hole structure with a driving hole, characterized in that: include: A tunnel main body, wherein a driving hole is formed by a transverse opening on one side of the tunnel main body, and the driving hole is an arched structure, one end of the driving hole is connected to the inner side of the tunnel main body, and the other end is connected to the external space; A plurality of reinforced ring beam assemblies are provided in the driving tunnel, and concrete is poured on the reinforced ring beam assemblies; It also includes diagonal bracing steel bars, which are located on both sides of the driving tunnel and at the door foot of the driving tunnel, and the diagonal bracing steel bars are fixedly connected to the corresponding reinforcing ring beam components; The plurality of reinforcing ring beam assemblies are distributed in a manner of being sequentially sleeved from the inside to the outside, and a first spacing is provided between adjacent reinforcing ring beam assemblies; The reinforced ring beam assembly includes a first connecting section, a second connecting section and a third connecting section; The first connecting section is configured to be arc-shaped, the curvature of the first connecting section matches the curvature of the inverted arch reinforcement of the open-end tunnel main body, and the first connecting section is distributed on both sides of the driving tunnel and is engaged with the inverted arch reinforcement; The second connecting section is distributed at the lower part of the driving tunnel, and is arranged horizontally. Both ends of the second connecting section are fixedly connected to the lower ends of the first connecting sections on both sides respectively; The third connecting section is distributed at the upper part of the driving tunnel, and the third connecting section is configured to be arched, with both ends of the third connecting section fixedly connected to the upper ends of the first connecting sections on both sides; The lengths of the first connection sections of the plurality of reinforced ring beam assemblies increase sequentially from the inside to the outside, and the radii and arc lengths of the third connection sections of the plurality of reinforced ring beam assemblies increase sequentially from the inside to the outside.

2. The open-cut tunnel structure with a driving tunnel according to claim 1, characterized in that: The distribution direction of the third connection sections of the plurality of reinforced ring beam assemblies matches the curvature of the inverted arch reinforcement.

3. The open-cut tunnel structure with a driving tunnel according to claim 1, characterized in that: Each of the reinforcing ring beam assemblies is arranged in a plurality along the opening direction of the driving tunnel, and a second spacing exists between the reinforcing ring beam assemblies distributed in the opening direction of the driving tunnel.

4. The open-cut tunnel structure with a driving tunnel according to claim 2, characterized in that: It also includes first stirrups, second stirrups, third stirrups and fourth stirrups. The first stirrups and the second stirrups are arranged on the first connecting segments on both sides, the third stirrups are arranged on the second connecting segment, and the fourth stirrups are arranged on the third connecting segment.

5. The open-cut tunnel structure with a driving tunnel according to claim 3, characterized in that: The inverted arch reinforcement located at the lower part of the driving tunnel extends upward to pass through the second connection section at the uppermost end and forms a reserved joint reinforcement.

6. The open-cut tunnel structure with a driving tunnel according to claim 1, characterized in that: It also includes a water stop strip embedded in the reinforcing ring beam steel bar assembly, and a portion of the water stop strip extends out of the reinforcing ring beam steel bar assembly toward the center line of the driving tunnel.

7. A construction method for a tunnel open hole structure, characterized in that: The method for forming the open-cut tunnel structure with a driving tunnel as claimed in any one of claims 1 to 6 comprises the following steps: Arrange the inverted arch reinforcement of the main body of the tunnel; Cut off the inverted arch steel bars at the side wall of the main body of the tunnel to form a driving tunnel; Arrange several reinforced ring beam assemblies in the driving tunnel, and connect the reinforced ring beam assemblies with the inverted arch reinforcement; Arrange the lining reinforcement of the main body of the tunnel; Arrange the casting templates for the main body of the tunnel and the driving tunnel, and connect the casting templates for the driving tunnel with the casting templates for the main body of the tunnel; Concrete is poured in the casting formwork to eventually form a tunnel open hole structure with a driving hole; Before closing, both sides of the tunnel need to be roughened. During the roughening process, circumferential chiseling is performed along the contour of the tunnel. There is an angle of 10°-15° between the circumferential chiseling line and the edge of the tunnel structure, so that the tunnel opening after roughening has a structure with a larger outside and a smaller inside.

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