Tunnel reinforcing system based on UHPC prefabricated reinforcing component and construction method of tunnel reinforcing system
By assembling the tunnel with prefabricated UHPC reinforcement components, a high durability and high strength tunnel reinforcement structure is formed, which solves the problems of long construction period, difficult quality guarantee and poor durability in the existing tunnel reinforcement methods.
Patent Information
- Application Number
- CN202411876824.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-03-18
AI Technical Summary
In the existing tunnel reinforcement methods, cast-in-place concrete arches have a long construction period, difficult to guarantee the construction quality, and the durability of metal corrugated plates or steel frame reinforcement structures is poor.
A tunnel reinforcement system based on UHPC prefabricated reinforcement components is used. Reinforcement members made of prefabricated UHPC materials are assembled in the tunnel to form an arched body structure and strengthen the connection through high-strength bolts and reinforcement beams.
It significantly shortens the construction period, improves the construction quality, enhances the durability and deformation resistance of the structure, and improves the overall safety of the tunnel structure.
Smart Images
Figure CN119641386A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of tunnel construction, and in particular to a tunnel reinforcement system based on UHPC prefabricated reinforcement components and a construction method thereof. Background Art
[0002] During tunnel operation, affected by natural disasters, material aging, engineering quality defects, etc., the tunnel lining will be damaged, deformed, etc., resulting in the inability to operate the tunnel normally, and even posing a threat to driving safety. In areas where the lining is severely damaged and deformed and the construction quality is defective, traditional steel plate reinforcement measures are not enough to resist structural deformation. Under the premise of ensuring the tunnel construction limit, sleeve arches can be used for reinforcement treatment, which can improve the overall deformation resistance of the lining structure and curb the further development of the disease.
[0003] However, the casing used in tunnel disease treatment generally uses cast-in-place concrete, which takes a long time to construct and is difficult to guarantee in terms of construction quality. Secondary cracking is very likely to occur in the later stage. When the building limit margin is small, thin casing or new material casing can be used to replace the traditional cast-in-place concrete casing, such as metal corrugated plates or steel frames, but the durability is poor and the insulation protection is difficult, so it is mostly used as a temporary support.
[0004] Therefore, it is necessary to propose new measures to overcome the above-mentioned defects. Summary of the invention
[0005] The purpose of the present invention is to provide a tunnel reinforcement system based on UHPC prefabricated reinforcement components and a construction method thereof, so as to solve the problems of long construction period and difficult to ensure construction quality of cast-in-place concrete lining, and poor durability of metal corrugated plate or steel frame reinforcement structure.
[0006] In order to achieve the above object, the technical solution adopted by the present invention is:
[0007] A tunnel reinforcement system based on UHPC prefabricated reinforcement components, the tunnel reinforcement system comprising UHPC prefabricated reinforcement components fixed to the inner side of the tunnel lining;
[0008] The UHPC prefabricated reinforcement component is a strip-shaped rectangular plate bent in one direction, which is prefabricated from UHPC material;
[0009] A plurality of the UHPC prefabricated reinforcement components are spliced circumferentially along the inner side of the tunnel lining and then spliced longitudinally with staggered seams to form an arched body, and the bottoms of both sides of the arched body are fixed to the wall footing foundations arranged on the lateral sides of the track surface in the tunnel.
[0010] Furthermore, two longitudinal sides of the UHPC prefabricated reinforcement component are provided with splicing plates integrally formed therewith, and screw holes are reserved on the splicing plates and face the inside of the tunnel.
[0011] Furthermore, at the annular seam of the arch body, the splicing plates of adjacent UHPC prefabricated reinforcement components are butted against each other and connected by high-strength bolts.
[0012] Alternatively, a circumferentially curved reinforcing beam is provided at the circumferential seam of the arch body, and screw holes are reserved on the reinforcing beam;
[0013] The longitudinally adjacent UHPC prefabricated reinforcement components are respectively fixed to the longitudinal front and rear sides of the reinforcement beam by high-strength bolts.
[0014] Furthermore, the UHPC prefabricated reinforcement component is a corrugated plate, a flat plate, a box plate, a groove pile plate or a comb-tooth pile plate.
[0015] Furthermore, the reinforcing beam is a channel steel beam, a square steel beam or an I-beam.
[0016] Furthermore, a reserved hole is provided on the UHPC prefabricated reinforcement component, and short bars are provided on the inner side of the tunnel lining, and the short bars pass through the reserved hole and are anchored.
[0017] Furthermore, concrete or structural adhesive is backfilled between the UHPC prefabricated reinforcement component and the tunnel lining.
[0018] On the other hand, a construction method of a tunnel reinforcement system based on UHPC prefabricated reinforcement components is provided, the method comprising:
[0019] Prefabricate UHPC prefabricated reinforcement components with splicing plates, and reserve screw holes on the splicing plates;
[0020] Roughen the tunnel lining surface, clean it and apply concrete interface agent;
[0021] Construct a reinforced concrete footing foundation at the foot of the existing secondary lining wall and fix it with foot-locking anchor rods;
[0022] Assemble the UHPC prefabricated reinforcement components from the bottom to the top of the wall footings on both sides. Use high-strength bolts to connect the joint plates of the blocks. After assembling one ring, install the next ring and splice them with staggered joints.
[0023] Filling concrete or structural adhesive behind the UHPC prefabricated reinforcement components;
[0024] Short reinforcement bars are implanted into the reserved holes of the UHPC prefabricated reinforcement components to fix the UHPC prefabricated reinforcement components to the tunnel lining.
[0025] On the other hand, a construction method of a tunnel reinforcement system based on UHPC prefabricated reinforcement components is provided, the method comprising:
[0026] Prefabricate UHPC prefabricated reinforcement components with splicing plates, and reserve screw holes on the splicing plates;
[0027] Prefabricated reinforcement beams with screw holes reserved on them;
[0028] Roughen the tunnel lining surface, clean it and apply concrete interface agent;
[0029] Construct a reinforced concrete footing foundation at the foot of the existing secondary lining wall and fix it with foot-locking anchor rods;
[0030] Start assembling the reinforcement beams from the bottom up on both sides of the wall footings, use high-strength bolts to connect the sections, assemble them into a ring, and then assemble the reinforcement beams;
[0031] Install UHPC prefabricated reinforcement components from bottom to top between two reinforcement beams, and use high-strength bolts to connect the UHPC prefabricated reinforcement components and the reinforcement beams;
[0032] Filling concrete or structural adhesive behind the UHPC prefabricated reinforcement components;
[0033] Short reinforcement bars are implanted into the reserved holes of the UHPC prefabricated reinforcement components to fix the UHPC prefabricated reinforcement components to the tunnel lining.
[0034] Compared with the prior art, the present invention has the following beneficial effects:
[0035] The present invention provides a tunnel reinforcement system based on UHPC prefabricated reinforcement components and a construction method thereof. The tunnel reinforcement components are prefabricated using UHPC (Ultra-High Performance Concrete) and assembled at the tunnel construction site. The construction is convenient and fast, the quality controllability is strong, and the reinforcement components are high in strength, light in weight, and durable. The safety of the existing tunnel structure can be greatly improved, and the improvement effect is good. BRIEF DESCRIPTION OF THE DRAWINGS
[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.
[0037] Figure 1 It is a cross-sectional view of a tunnel constructed by the present invention.
[0038] Figure 2 It is a schematic diagram of the combination of UHPC prefabricated reinforcement components and tunnel lining.
[0039] Figure 3 It is a schematic diagram of the assembly of UHPC prefabricated reinforcement components.
[0040] Figure 4 It is a schematic diagram of the circumferential seam connection of UHPC prefabricated reinforcement components.
[0041] Figure 5 Schematic diagram of the circumferential seam connection of the corrugated UHPC prefabricated reinforcement component in Example 1.
[0042] Figure 6 It is a schematic diagram of the circumferential seam connection of the corrugated UHPC prefabricated reinforcement component and the channel steel reinforcement beam in Example 1.
[0043] Figure 7 Schematic diagram of the circumferential seam connection of the corrugated UHPC prefabricated reinforcement component and the square steel reinforcement beam in Example 1.
[0044] Figure 8 Schematic diagram of the circumferential seam connection of the corrugated UHPC prefabricated reinforcement component and the I-beam reinforcement beam in Example 1.
[0045] Fig. 9 Schematic diagram of the circumferential seam connection of the flat UHPC prefabricated reinforcement component in Example 2.
[0046] Fig.10 Schematic diagram of the circumferential seam connection of the box-type UHPC prefabricated reinforcement component in Example 3.
[0047] Fig.11 Schematic diagram of the circumferential seam connection of the gully pile UHPC prefabricated reinforcement component in Example 4.
[0048] Fig.12 Schematic diagram of the circumferential seam connection of the comb-tooth pile UHPC prefabricated reinforcement component in Example 5.
[0049] The symbols in the figure are:
[0050] 1-UHPC prefabricated reinforcement components, 2-wall foundation, 3-short reinforcement, 4-locking anchor rods, 5-tunnel lining, 6-ditch cable trough, 7-tunnel primary lining, 8-tunnel inner track surface, 9-splicing plate, 10-structural adhesive, 11-reserved holes, 12-circumferential joints, 13-longitudinal joints, 14-high-strength bolts, 15-reinforced beams. DETAILED DESCRIPTION
[0051] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.
[0052] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "front", "rear", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0053] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connection", "setting", etc. should be understood in a broad sense, for example, it can be fixed connection, setting, or detachable connection, setting, or integral connection, setting. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0054] It should also be noted that although the order of steps is mentioned in the method description, in some cases, they may be performed in an order different from that shown here, and this should not be construed as a limitation on the order of the steps.
[0055] In a specific implementation manner, the tunnel line direction is defined as the longitudinal direction, the direction perpendicular to the tunnel line direction is defined as the transverse direction, and the direction of the tunnel inner contour line is defined as the circumferential direction.
[0056] In view of the defects of slow construction speed of cast-in-place concrete sleeve arch and poor durability of steel plate sleeve arch, the present invention provides a tunnel reinforcement system based on UHPC prefabricated reinforcement components. The UHPC prefabricated reinforcement components 1 are assembled and constructed, which effectively speeds up the construction speed. The UHPC materials are used to significantly improve the durability of the structure. It is a tunnel lining reinforcement measure that takes into account both construction efficiency and quality.
[0057] Specifically, Figure 1 The tunnel reinforcement system includes a UHPC prefabricated reinforcement component 1 fixed on the inner side of the tunnel lining 5. The UHPC prefabricated reinforcement component 1 is a unidirectionally bent strip-shaped rectangular plate prefabricated from UHPC material.
[0058] like Figure 5 and Figure 9-12 The prefabricated structure type of UHPC material is relatively flexible. The UHPC prefabricated reinforcement component 1 can be prefabricated into a corrugated plate (Example 1), a flat plate (Example 2), a box plate (Example 3), a gully pile plate (Example 4) or a comb-tooth pile plate (Example 5). In some areas with greater force requirements, a non-flat plate structure is more suitable.
[0059] After multiple UHPC prefabricated reinforcement components 1 are spliced circumferentially along the inner side of the tunnel lining 5, they are then spliced longitudinally with staggered joints to form an arched body. The bottoms of both sides of the arched body are fixed on the wall footings 2 arranged on the lateral sides of the tunnel inner track surface 8. The wall footings 2 are fixed by locking anchor rods 4 driven into the surrounding rock to improve the bearing capacity and stability.
[0060] like Figure 2 The UHPC prefabricated reinforcement component 1 is as close to the inner surface of the tunnel lining 5 as possible, and concrete or structural adhesive 10 is backfilled between the two.
[0061] like Figure 3 When the UHPC prefabricated reinforcement components 1 are spliced circumferentially, a longitudinal seam 12 is formed. Multiple UHPC prefabricated reinforcement components 1 form an arched strip on the inner side of the tunnel lining 5. When multiple arched strips are spliced longitudinally, a circumferential seam 11 is formed. The longitudinal seams 12 are staggered front and back, and no longitudinal joints that affect the overall stress are formed.
[0062] like Figure 4 The UHPC prefabricated reinforcement components 1 are provided with integrally formed splicing plates 9 on both longitudinal sides, with screw holes reserved on the splicing plates 9 facing the inner side of the tunnel. At the annular seam 12 of the arch body, the splicing plates 9 of adjacent UHPC prefabricated reinforcement components 1 are butted against each other and connected by high-strength bolts 14.
[0063] Further, such as Figure 6-8 , a circumferentially curved reinforcing beam 15 can be additionally provided at the circumferential seam 12 of the arch body, and screw holes are reserved on the reinforcing beam 15. The longitudinally adjacent UHPC prefabricated reinforcement components 1 are respectively fixed to the longitudinal front and rear sides of the reinforcing beam 15 by high-strength bolts 14. The reinforcing beam 15 becomes the circumferential skeleton of the arch body, further improving the stress-bearing performance of the arch body.
[0064] like Figure 6-8 The reinforcing beam 15 can also adopt different structural forms, such as channel steel beam, square steel beam or I-beam, and can also adopt H-shaped steel beam, box beam, T-shaped beam, etc., and can be prefabricated in sections. A connecting plate for splicing can be set at the end of each prefabricated reinforcing beam 15, and screw holes are reserved, and they are connected to each other through high-strength bolts 14.
[0065] In other embodiments, a reinforcing block may be fixed on the inner side of the annular seam 12 of the arch body. The reinforcing block may be a corrugated plate, a flat plate, etc. to adapt to the structural form of the UHPC prefabricated reinforcement component 1. Fixing it at the annular seam 12 may limit the longitudinal widening of the annular seam 12.
[0066] In addition, a reserved hole 11 is provided on the UHPC prefabricated reinforcement component 1 , and short bars 3 are provided on the inner side of the tunnel lining 5 . The short bars 3 pass through the reserved hole 11 and are anchored, so that the UHPC prefabricated reinforcement component 1 is fixed to the tunnel lining 5 .
[0067] On the other hand, the present invention also provides a construction method of the tunnel reinforcement system based on the above-mentioned UHPC prefabricated reinforcement component, which is used to construct a reinforcement system without a reinforcing beam 15, and the method specifically comprises the following steps:
[0068] S1: Prefabricate a UHPC prefabricated reinforcement component 1 with a splicing plate 9, and reserve screw holes on the splicing plate 9.
[0069] Before prefabrication, it is necessary to measure and scan the inner contour of the existing tunnel lining 5 to determine the processing dimensions of the UHPC prefabricated reinforcement component 1.
[0070] S2: Roughen the surface of the tunnel lining 5, clean it and apply concrete interface agent.
[0071] The interface agent can be a polymer-modified cement mortar, which has super strong bonding strength, excellent water resistance and aging resistance. It can improve the durability of existing concrete and enhance the bonding between existing concrete and reinforced components.
[0072] S3: A reinforced concrete footing foundation 2 is constructed at the foot of the existing secondary lining wall and fixed by foot locking anchor rods 4.
[0073] The wall foot foundation 2 can be cast-in-place or prefabricated and installed. The wall foot foundation 2 needs to be pre-buried with connecting steel plates and anchor bolts to connect and fix with the upper structure.
[0074] S4: Assemble the UHPC prefabricated reinforcement components 1 from the bottom to the top of the wall footings 2 on both sides. Use high-strength bolts 14 to connect the splicing plates 9 of the blocks. After assembling one ring, make the next ring and splice them with staggered seams.
[0075] S5: Fill the back of the UHPC prefabricated reinforcement component 1 with concrete or structural adhesive 10 to ensure that it forms an integral whole with the existing lining 1.
[0076] S6: implanting short bars 3 into the reserved holes 11 of the UHPC prefabricated reinforcement component 1 , thereby fixing the UHPC prefabricated reinforcement component 1 on the tunnel lining 5 .
[0077] The present invention also provides another method for constructing a tunnel reinforcement system based on UHPC prefabricated reinforcement components, which is used to construct a reinforcement system with a reinforcement beam 15. The method specifically comprises the following steps:
[0078] S1: Prefabricate a UHPC prefabricated reinforcement component 1 with a splicing plate 9, and reserve screw holes on the splicing plate 9.
[0079] S2: prefabricate the reinforcing beam 15, and reserve screw holes on the reinforcing beam 15. The processing size of the reinforcing beam 15 is further determined according to the UHPC prefabricated reinforcement component 1.
[0080] S3: Roughen the surface of the tunnel lining 5, clean it and apply concrete interface agent.
[0081] S4: A reinforced concrete wall footing foundation 2 is constructed at the foot of the existing secondary lining wall and fixed by locking anchor rods 4.
[0082] S5: Assemble the reinforcing beams 15 from the bottom to the top of the wall footings 2 on both sides, connect the sections with high-strength bolts 14, assemble them into a ring, and then assemble the reinforcing beams 15 one by one.
[0083] S6: Install the UHPC prefabricated reinforcement component 1 between the two reinforcement beams 15 from bottom to top, and use high-strength bolts 14 to connect the UHPC prefabricated reinforcement component 1 and the reinforcement beam 15.
[0084] S7: Fill the back of the UHPC prefabricated reinforcement component 1 with concrete or structural adhesive 10 to ensure that it forms an integral whole with the existing lining 1.
[0085] S8: implanting short bars 3 into the reserved holes 11 of the UHPC prefabricated reinforcement component 1 , thereby fixing the UHPC prefabricated reinforcement component 1 on the tunnel lining 5 .
[0086] The method of the present invention prefabricates tunnel reinforcement components and assembles them on site to form sleeve arches, which can significantly increase construction speed, shorten the impact time on traffic on existing lines, significantly reduce labor intensity, and ensure extremely high construction safety.
[0087] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not used to limit the present invention. For those skilled in the art to which the present invention belongs, some simple deductions, modifications or substitutions can be made according to the idea of the present invention.
Claims
1. The tunnel reinforcement system based on UHPC prefabricated reinforcement components is characterized by: The tunnel reinforcement system comprises a UHPC prefabricated reinforcement component (1) fixed inside a tunnel lining (5); The UHPC prefabricated reinforcement component (1) is a strip-shaped rectangular plate bent in one direction and is prefabricated from UHPC material; A plurality of the UHPC prefabricated reinforcement components (1) are spliced circumferentially along the inner side of the tunnel lining (5), and then spliced longitudinally with staggered seams to form an arched body, and the bottoms of both sides of the arched body are fixed on the wall footings (2) arranged on the lateral sides of the tunnel inner track surface (8).
2. The tunnel reinforcement system based on UHPC prefabricated reinforcement components according to claim 1 is characterized in that: The UHPC prefabricated reinforcement component (1) is provided with integrally formed splicing plates (9) on both longitudinal sides thereof, and screw holes are reserved on the splicing plates (9) and face the inside of the tunnel.
3. The tunnel reinforcement system based on UHPC prefabricated reinforcement components according to claim 2 is characterized in that: At the annular seam (12) of the arched body, the splicing plates (9) of adjacent UHPC prefabricated reinforcement components (1) are butted against each other and connected via high-strength bolts (14).
4. The tunnel reinforcement system based on UHPC prefabricated reinforcement components according to claim 2 is characterized in that: A circumferentially curved reinforcing beam (15) is provided at the circumferential seam (12) of the arch body, and a screw hole is reserved on the reinforcing beam (15); The longitudinally adjacent UHPC prefabricated reinforcement components (1) are respectively fixed to the longitudinal front and rear sides of the reinforcement beam (15) by high-strength bolts (14).
5. The tunnel reinforcement system based on UHPC prefabricated reinforcement components according to claim 1, characterized in that: The UHPC prefabricated reinforcement component (1) is a corrugated plate, a flat plate, a box-shaped plate, a gully pile plate or a comb-tooth pile plate.
6. The tunnel reinforcement system based on UHPC prefabricated reinforcement components according to claim 4 is characterized in that: The reinforcing beam (15) is a channel steel beam, a square steel beam or an I-beam.
7. The tunnel reinforcement system based on UHPC prefabricated reinforcement components according to claim 1, characterized in that: The UHPC prefabricated reinforcement component (1) is provided with a reserved hole (11), and the inner side of the tunnel lining (5) is provided with a short rib (3), and the short rib (3) passes through the reserved hole (11) and is anchored.
8. The tunnel reinforcement system based on UHPC prefabricated reinforcement components according to claim 1, characterized in that: Concrete or structural adhesive (10) is backfilled between the UHPC prefabricated reinforcement component (1) and the tunnel lining (5).
9. The construction method of a tunnel reinforcement system based on UHPC prefabricated reinforcement components according to claim 3, characterized in that: The method comprises: Prefabricating a UHPC prefabricated reinforcement component (1) having a splicing plate (9), wherein screw holes are reserved on the splicing plate (9); The surface of the tunnel lining (5) is roughened, cleaned, and then coated with a concrete interface agent; A reinforced concrete footing foundation (2) is constructed at the foot of the existing secondary lining wall and fixed by foot locking anchor rods (4); Assembling the UHPC prefabricated reinforcement components (1) from the bottom to the top of the wall foot foundations (2) on both sides, connecting the splicing plates (9) of the blocks with each other using high-strength bolts (14), and after assembling one ring, the next ring is constructed and staggered; Filling concrete or structural adhesive (10) behind the UHPC prefabricated reinforcement component (1); Short reinforcement bars (3) are implanted into the reserved holes (11) of the UHPC prefabricated reinforcement component (1), thereby fixing the UHPC prefabricated reinforcement component (1) on the tunnel lining (5).
10. The construction method of a tunnel reinforcement system based on UHPC prefabricated reinforcement components according to claim 4, characterized in that: The method comprises: Prefabricating a UHPC prefabricated reinforcement component (1) having a splicing plate (9), wherein screw holes are reserved on the splicing plate (9); Prefabricate a reinforcing beam (15), and reserve screw holes on the reinforcing beam (15); The surface of the tunnel lining (5) is roughened, cleaned, and then coated with a concrete interface agent; A reinforced concrete footing foundation (2) is constructed at the foot of the existing secondary lining wall and fixed by foot locking anchor rods (4); Assemble the reinforcement beam (15) from the bottom to the top of the wall foot foundation (2) on both sides, connect the sections with high-strength bolts (14), assemble into a ring and then assemble the reinforcement beam (15); A UHPC prefabricated reinforcement component (1) is installed from bottom to top between two reinforcement beams (15), and the UHPC prefabricated reinforcement component (1) and the reinforcement beam (15) are connected by high-strength bolts (14); Filling concrete or structural adhesive (10) behind the UHPC prefabricated reinforcement component (1); Short reinforcement bars (3) are implanted into the reserved holes (11) of the UHPC prefabricated reinforcement component (1), thereby fixing the UHPC prefabricated reinforcement component (1) on the tunnel lining (5).