Prefabricated assembly structure inside shield tunnel and assembly construction method thereof

Abstract

The present invention discloses a prefabricated assembly structure inside a shield tunnel and an assembly construction method thereof, comprising a plurality of assembly components, each of which comprises a mouth-shaped support, a joist, and a prefabricated lane slab. An inverted "L"-shaped groove is provided on each mouth-shaped support near both sides, and a joist limit block is provided in the inner cavity; one end of each joist card embedded in the groove is provided with a barb structure extending into the inner cavity of the corresponding mouth-shaped support; each barb structure includes a hook head that hooks the corresponding joist limit block in the horizontal direction; there is a gap between the end face of one end of the joist card embedded in the corresponding groove and the side wall on the corresponding mouth-shaped support corresponding to the corresponding groove; each prefabricated lane slab has a matching protrusion on the bottom of each gap within the corresponding coverage range. During construction, all the mouth-shaped support components, joists, and prefabricated lane slabs are installed in sequence. The application of the present invention can reduce the cast-in-place concrete operation and realize the fully prefabricated assembly of the internal structure.

Description

Technical Field

[0001] The present invention relates to the technical field of shield tunnel internal structure construction, in particular to a shield tunnel internal prefabricated assembly structure and an assembly construction method thereof. Background Art

[0002] In existing technologies, the internal structure of shield tunnels has gradually evolved from traditional cast-in-place construction to prefabricated construction. However, most so-called fully prefabricated structures still have local wet operations, which does not fully demonstrate the advantages of prefabrication and assembly technology. The main disadvantages of the traditional prefabrication and assembly process commonly used in the industry are:

[0003] 1. The curved plates and corbels need to be cast in place. The work of erecting the formwork for the curved plates and corbels is complicated and the construction speed is slow.

[0004] 2. There are a considerable number of embedded steel bars in the corbels and curved plates, which not only reduces work efficiency but also causes certain damage to the segment structure;

[0005] 3. Wet operations not only affect construction efficiency, but also generate dust and solid waste during material transportation, affecting the tunnel environment.

[0006] 4. Some scholars have tried to use prefabrication technology for curved plates and corbels, but the installation accuracy of the curved sections is high, and it is often difficult to ensure the assembly quality.

[0007] Therefore, how to avoid cast-in-place operations and truly achieve full prefabrication assembly has become a technical problem that technicians in this field urgently need to solve. Summary of the Invention

[0008] In view of the above-mentioned defects of the prior art, the present invention provides a prefabricated assembly structure inside a shield tunnel and an assembly construction method thereof, the purpose of which is to completely avoid cast-in-place operations and truly achieve full prefabrication and assembly. In addition, the connection of prefabricated parts is simple, convenient and reliable, and can greatly improve the construction speed.

[0009] To achieve the above-mentioned purpose, the present invention discloses a prefabricated assembly structure inside a shield tunnel, comprising a plurality of prefabricated assembly components arranged along the length direction of the shield tunnel.

[0010] Each of the prefabricated assembly components includes at least one mouth-shaped support member, at least four joists symmetrically arranged on both sides of the mouth-shaped support member near the upper position, and a lane plate laid on two or more of the joists on each side of the mouth-shaped support member;

[0011] Each of the mouth-shaped support members is a tubular structure with a cross section corresponding to the bottom of the corresponding shield tunnel and an arc-shaped convex surface. The upper two sides and the upper edge positions of the two side surfaces are provided with grooves for embedding the corresponding joists. The inner wall corresponding to the upper side of the inner cavity is provided with a joist limit block extending along the length direction corresponding to each joist.

[0012] The thickness of each joist matches the corresponding groove, one end of which is embedded in the corresponding groove, and one end of which is embedded in the groove is provided with a barb structure extending into the inner cavity of the corresponding mouth-shaped support member;

[0013] The hook mouth of each barb structure faces the corresponding joist limit block, and includes a hook head that hooks the corresponding joist limit block in the horizontal direction after the corresponding joist is installed, and a hook rod for connecting the corresponding hook head and the corresponding joist.

[0014] Preferably, after installation, the top surface of each lane slab is flush with the top surface of the corresponding mouth-shaped support member.

[0015] More preferably, the flush surface formed by splicing each of the mouth-shaped support members and all the corresponding lane slabs is paved with road pavement;

[0016] Anti-collision walls are provided on both sides of the road pavement.

[0017] More preferably, each of the joists within the corresponding coverage range below each of the lane slabs is provided with a limiting groove matching the corresponding joist.

[0018] Preferably, the edges of each of the mouth-shaped support members, each of the joists and each of the lane slabs are provided with a chamfer of 20 mm x 20 mm.

[0019] Preferably, the length of each of the mouth-shaped support members extends along the length direction of the shield tunnel, and the portion contacting the pipe segment of the shield tunnel below is an arc-shaped outer convex surface matching the shield tunnel.

[0020] Preferably, the length of each hook rod satisfies the following conditions:

[0021] When the corresponding hook head is obliquely inserted into the corresponding groove at an angle of less than 90 degrees to the horizontal plane until the upper and lower edges of the end surface of one end of the corresponding joist respectively contact the upper and side walls of the corresponding mouth-shaped support member corresponding to the groove, the corresponding hook head is located on the inner side of the corresponding joist limit block;

[0022] When the length of each hook rod meets the above conditions, after the corresponding joist is installed, there is a gap between the end surface of one end of the corresponding joist embedded in the corresponding groove and the side wall of the corresponding groove corresponding to the upper surface of the corresponding mouth-shaped support member;

[0023] A matching protrusion is provided on the bottom of each lane plate corresponding to each gap within the coverage range.

[0024] The present invention also provides an assembling construction method of a prefabricated assembly structure inside a shield tunnel, comprising the following steps:

[0025] Step 1: prefabricate all the lane slabs, all the joists and all the mouth-shaped supports in all prefabricated assembly components;

[0026] Step 2: hoist each of the die-shaped support members and install each of the die-shaped support members in place;

[0027] Step 3, install all the joists; each joist is inserted into the corresponding groove at an angle less than 90 degrees to the horizontal plane, so that the bottom of each joist fits the side wall of the corresponding groove corresponding to the side of the corresponding mouth-shaped support member, and then rotated to a horizontal position so that each corresponding hook head hooks the corresponding joist limit block in the horizontal direction;

[0028] Step 4: Install all the lane slabs, insert the protrusions under each lane slab into the corresponding gaps, and at the same time insert each joist into the corresponding limiting groove under the corresponding lane slab.

[0029] Preferably, in step 2 and step 4, each two adjacent mouth-shaped supports and each two adjacent lane plates are fixed longitudinally by corresponding top bolts, and the assembly gap is adjusted by nitrile rubber gaskets.

[0030] Preferably, after completing the installation of the prefabricated assembly structure, that is, after step 4, continue paving the road, the steps are as follows:

[0031] Step 5: Install the anti-collision stones on both sides; the anti-collision stones on both sides are fixed by the corresponding reserved sleeve bolts of the lane plate, and UHPC high-performance concrete is injected into the sleeve to ensure a firm connection;

[0032] Step 6: constructing a reinforced concrete pavement and an asphalt pavement layer between the anti-collision stone paving on both sides;

[0033] Step 7: Complete the internal structure of the shield tunnel and road construction.

[0034] Beneficial effects of the present invention:

[0035] The application of the present invention can reduce the cast-in-place concrete operation, realize the fully prefabricated assembly of the internal structure, improve the working environment, avoid the hoisting of special parts such as arc-shaped parts, and reduce the uncontrollable factors caused by insufficient assembly precision.

[0036] Compared with the prior art, the prefabrication and assembly method of the present invention is more convenient, safer, more reliable, and has higher construction efficiency.

[0037] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic structural diagram showing the installation of a mouth-shaped support member in one embodiment of the present invention is shown.

[0039] Figure 2 A schematic diagram of the cross-sectional structure of a mouth-shaped support member in one embodiment of the present invention is shown.

[0040] Figure 3 A schematic diagram of the side structure of a mouth-shaped support member in one embodiment of the present invention is shown.

[0041] Figure 4 A schematic diagram of the structure of the inner cavity of a mouth-shaped support member in an embodiment of the present invention when viewed from above is shown.

[0042] Figure 5 A schematic diagram illustrating the structure of a joist in one embodiment of the present invention being obliquely inserted into a corresponding groove at an angle of less than 90 degrees to a horizontal plane.

[0043] Figure 6 A schematic diagram of the structure of the support beam in an upward direction in one embodiment of the present invention is shown.

[0044] Figure 7 A schematic structural diagram showing a surface perpendicular to the length direction of the shield tunnel and a supporting beam in one embodiment of the present invention is shown.

[0045] Figure 8 A schematic structural diagram of a joist inserted into one end of a groove in one embodiment of the present invention is shown.

[0046] Figure 9 A schematic structural diagram showing the completed installation of the joist in one embodiment of the present invention is shown.

[0047] Figure 10 A schematic structural diagram of the installation of a lane plate in one embodiment of the present invention is shown.

[0048] Figure 11 A schematic structural diagram showing a surface of the lane slab perpendicular to the length direction of the shield tunnel in one embodiment of the present invention is shown.

[0049] Figure 12 A schematic diagram of the structure of a lane slab in a top view according to an embodiment of the present invention is shown.

[0050] Figure 13 A schematic structural diagram of one end portion of a lane slab in one embodiment of the present invention is shown.

[0051] Figure 14 A schematic structural diagram of completing road paving in one embodiment of the present invention is shown.

[0052] Figure 15 A schematic diagram of the cross-sectional structure of each group of prefabricated assembly components after assembly is completed in one embodiment of the present invention is shown.

[0053] Figure 16 A schematic diagram of the connection structure of each group of prefabricated assembly components after assembly is completed in one embodiment of the present invention is shown.

[0054] Figure 17 A schematic diagram of the side structure of each group of prefabricated assembly components after assembly is completed in one embodiment of the present invention is shown.

[0055] Figure 18 A schematic diagram illustrating the structure of multiple groups of prefabricated assembly components after assembly is completed in one embodiment of the present invention. DETAILED DESCRIPTION

[0056] Example

[0057] like Figure 10 ,as well as Figures 15 to 18 As shown, the prefabricated assembly structure inside the shield tunnel includes multiple prefabricated assembly components arranged along the length direction of the shield tunnel 1.

[0058] Each prefabricated assembly component includes at least one mouth-shaped support member 2, at least four joists 3 symmetrically arranged on both sides of the mouth-shaped support member 2 near the upper position, and a track slab 4 laid on two or more joists 3 on each side of the mouth-shaped support member 2;

[0059] Each of the mouth-shaped support members 2 is a tubular structure with a cross section corresponding to the bottom position of the corresponding shield tunnel and an arc-shaped convex surface. Grooves 5 for embedding corresponding joists 3 are provided on both sides of the upper portion and the upper edge positions of both sides. A joist limit block 6 extending along the length direction is provided on the inner wall corresponding to the upper portion of the inner cavity and corresponding to each joist 3.

[0060] The thickness of each joist 3 matches the corresponding groove 5, and one end is embedded in the corresponding groove 5, and the end embedded in the groove 5 is provided with a barb structure extending into the inner cavity of the corresponding mouth-shaped support member 2;

[0061] The hook mouth of each barb structure is facing the corresponding joist limit block 6, and includes a hook head 7 that hooks the corresponding joist limit block 6 in the horizontal direction after the corresponding joist 3 is installed, and a hook rod 8 for connecting the corresponding hook head 7 and the corresponding joist 3.

[0062] The principles of the present invention are as follows:

[0063] The present invention adopts prefabricated mouth-shaped support parts 2, joists 3 and lane plates 4 as the prefabricated assembled structure inside the shield tunnel, wherein the mouth-shaped support parts 2 are provided with grooves 5 at the position where they are connected to the joists 3. After the joists 3 are installed in place, they are horizontally fixed by the joist limit blocks 6 inside the mouth-shaped support parts 2.

[0064] The lane plate 4 has a protrusion 10 that can be inserted into the gap 9 between the end face of the joist 3 embedded in the corresponding groove 5 and the side wall of the corresponding mouth-shaped support member 2 corresponding to the corresponding groove 5. The lane plate 4 relies on the joist 3 for vertical stability.

[0065] In some embodiments, after installation, the top surface of each lane slab 4 is flush with the top surface of the corresponding mouth-shaped support member 2 .

[0066] In some embodiments, the flush surface formed by splicing each die-shaped support member 2 and all corresponding lane slabs 4 is paved with road pavement 11;

[0067] Crash barriers are provided on both sides of the road pavement 11 .

[0068] In some embodiments, each joist 3 within the corresponding coverage area below each lane slab 4 is provided with a limiting groove that matches the corresponding joist 3 .

[0069] In practice, the track slab 4 is provided with retaining grooves matching the corresponding joists 3. The joists 3 fit into the retaining grooves, making the track slab 4 more stable along the tunnel's direction. The track slab and the shaped parts are connected longitudinally with diagonal bolts, eliminating potential assembly errors. Nitrile rubber sheets are used to adjust the gaps between the assembled parts, ensuring a smooth assembly.

[0070] In some embodiments, the edges of each profile support 2 , each joist 3 and each driveway slab 4 are provided with a chamfer of 20 mm x 20 mm.

[0071] In practical applications, the edges of each profile support member 2, each joist 3 and each lane slab 4 are provided with a 20mm x 20mm chamfer to avoid chipping during the installation process.

[0072] In some embodiments, the length of each mouth-shaped support member 2 extends along the length direction of the shield tunnel 1 , and the lower portion in contact with the segments of the shield tunnel 1 is an arc-shaped outer convex surface matching the shield tunnel 1 .

[0073] In some embodiments, the length of each hook rod 8 satisfies the following conditions:

[0074] When the corresponding hook head 7 is obliquely inserted into the corresponding groove 5 at an angle of less than 90 degrees to the horizontal plane until the upper and lower edges of the end surface of one end of the corresponding joist 3 respectively contact the upper and corresponding side walls of the corresponding mouth-shaped support member 2 of the groove 5, the corresponding hook head 7 is located on the inner side of the corresponding joist limit block 6;

[0075] When the length of each hook rod 8 meets the requirements, after the corresponding joist 3 is installed, a gap 9 exists between the end surface of the corresponding joist 3 embedded in the corresponding groove 5 and the side wall of the corresponding groove 5 corresponding to the corresponding mouth-shaped support member 2;

[0076] A matching protrusion 10 is provided on the bottom of each lane plate 4 corresponding to each gap 9 within the coverage area.

[0077] like Figures 1 to 18 As shown, the present invention also provides an assembly construction method for a prefabricated assembly structure inside a shield tunnel, comprising the following steps:

[0078] Step 1: prefabricate all lane slabs 4, all joists 3 and all mouth-shaped supports 2 in all prefabricated assembly components;

[0079] Step 2: hoist each die support member 2 and install each die support member 2 in place;

[0080] Step 3, install all joists 3; each joist 3 is obliquely inserted into the corresponding groove 5 at an angle less than 90 degrees to the horizontal plane, so that the bottom of each joist 3 fits the side wall of the corresponding groove 5 corresponding to the side of the corresponding mouth-shaped support member 2, and then rotated to a horizontal position so that each corresponding hook head 7 hooks the corresponding joist limit block 6 in the horizontal direction;

[0081] Step 4: Install all the lane slabs 4 , insert the protrusions 10 under each lane slab 4 into the corresponding gaps 9 , and at the same time insert each joist 3 into the corresponding limiting groove under the corresponding lane slab 4 .

[0082] In some embodiments, in steps 2 and 4, each two adjacent mouth-shaped support members 2 and each two adjacent lane slabs 4 are fixed longitudinally by corresponding top bolts, and the assembly gap 9 is adjusted by nitrile rubber gaskets.

[0083] In actual application, the longitudinal directions between every two adjacent mouth-shaped support members 2 and between every two adjacent lane plates 4 are fixed by corresponding top bolts, and the assembly gap 9 is adjusted by nitrile rubber gaskets, which can eliminate possible assembly errors. In addition, nitrile rubber sheets are used to adjust the gap between the assembled parts, which makes the assembly effect better.

[0084] In some embodiments, after the installation of the prefabricated assembly structure is completed, that is, after step 4, the road pavement 11 is continued to be laid, and the steps are as follows:

[0085] Step 5: Install the anti-collision stones on both sides. The anti-collision stones on both sides are fixed with the corresponding reserved sleeve bolts of the lane plate 4. UHPC high-performance concrete is injected into the sleeve to ensure a firm connection.

[0086] Step 6: construct reinforced concrete pavement and asphalt pavement layers between the anti-collision stone paving on both sides;

[0087] Step 7: Complete the internal structure and road construction of shield tunnel 1.

[0088] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A prefabricated assembly structure inside a shield tunnel, comprising a plurality of prefabricated assembly components arranged along the length direction of the shield tunnel (1); characterized in that: Each of the prefabricated assembly components comprises at least one mouth-shaped support member (2), at least four joists (3) symmetrically arranged on both sides of the mouth-shaped support member (2) near the upper portion, and a driveway slab (4) laid on two or more of the joists (3) on each side of the mouth-shaped support member (2); Each of the mouth-shaped support members (2) is a tubular structure having an arc-shaped outer convex surface in a cross section corresponding to the bottom position of the corresponding shield tunnel, and grooves (5) for engaging the corresponding support beams (3) are provided at both sides of the upper portion and at the upper edge positions of both sides, and a support beam limit block (6) extending along the length direction is provided on the inner wall corresponding to the upper portion of the inner cavity and corresponding to each of the support beams (3); The thickness of each joist (3) matches the corresponding groove (5), one end of which is embedded in the corresponding groove (5), and the end embedded in the groove (5) is provided with a barb structure extending into the inner cavity of the corresponding mouth-shaped support member (2); The hook mouth of each barb structure faces the corresponding joist limit block (6), and each barb structure includes a hook head (7) that hooks the corresponding joist limit block (6) in the horizontal direction after the corresponding joist (3) is installed, and a hook rod (8) for connecting the corresponding hook head (7) and the corresponding joist (3).

2. The prefabricated assembly structure inside a shield tunnel according to claim 1, characterized in that: After installation, the top surface of each lane plate (4) is flush with the top surface of the corresponding mouth-shaped support member (2).

3. The prefabricated assembly structure inside a shield tunnel according to claim 2, characterized in that: The flush surface formed by splicing each of the mouth-shaped support members (2) and all the corresponding lane plates (4) is paved with a road pavement (11); Crash barriers are provided on both sides of the road pavement (11).

4. The prefabricated assembly structure inside a shield tunnel according to claim 1, characterized in that: Each of the support beams (3) within the corresponding coverage area below each of the lane slabs (4) is provided with a limiting groove that matches the corresponding support beam (3).

5. The prefabricated assembly structure inside a shield tunnel according to claim 1, characterized in that: The edges of each of the mouth-shaped support members (2), each of the supporting beams (3) and each of the lane slabs (4) are provided with a chamfer of 20 mm x 20 mm.

6. The prefabricated assembly structure inside a shield tunnel according to claim 1, characterized in that: The length of each of the mouth-shaped support members (2) extends along the length direction of the shield tunnel (1), and the portion below that contacts the segments of the shield tunnel (1) is an arc-shaped outer convex surface that matches the shield tunnel (1).

7. The prefabricated assembly structure inside a shield tunnel according to claim 1, characterized in that: The length of each hook rod (8) satisfies the following conditions: When the corresponding hook head (7) is obliquely inserted into the corresponding groove (5) at an angle of less than 90 degrees to the horizontal plane until the upper and lower edges of one end surface of the corresponding support beam (3) respectively contact the upper and corresponding side walls of the corresponding mouth-shaped support member (2) of the groove (5), the corresponding hook head (7) is located on the inner side of the corresponding support beam limit block (6); When the length of each hook rod (8) satisfies the above conditions, after the corresponding joist (3) is installed, a gap (9) exists between the end surface of one end of the corresponding joist (3) embedded in the corresponding groove (5) and the side wall of the corresponding groove (5) on the upper side of the corresponding mouth-shaped support member (2); Each of the gaps (9) within the corresponding coverage area on the bottom of each lane plate (4) is provided with a matching protrusion (10).

8. The method for assembling a prefabricated assembly structure inside a shield tunnel according to claim 7, characterized in that: The steps include: Step 1: prefabricate all the lane slabs (4), all the joists (3) and all the mouth-shaped supports (2) in all the prefabricated assembly components; Step 2, hoisting each of the mouth-shaped support members (2), and installing each of the mouth-shaped support members (2) in place; Step 3, installing all the joists (3); each joist (3) is obliquely inserted into the corresponding groove (5) at an angle less than 90 degrees to the horizontal plane, so that the bottom of each joist (3) fits the side wall of the corresponding groove (5) corresponding to the side of the corresponding mouth-shaped support member (2), and then rotated to a horizontal position, so that each corresponding hook head (7) hooks the corresponding joist limit block (6) in the horizontal direction; Step 4: Install all the lane slabs (4), insert the protrusions (10) below each lane slab (4) into the corresponding gaps (9), and simultaneously insert each support beam (3) into the corresponding limiting groove below the corresponding lane slab (4).

9. The method for assembling a prefabricated assembly structure inside a shield tunnel according to claim 8, characterized in that: In step 2 and step 4, each two adjacent mouth-shaped support members (2) and each two adjacent lane plates (4) are fixed longitudinally by corresponding top bolts, and the assembly gap (9) is adjusted by nitrile rubber gaskets.

10. The method for assembling a prefabricated assembly structure inside a shield tunnel according to claim 8, characterized in that: After the installation of the prefabricated assembly structure is completed, that is, after step 4, the road pavement (11) is laid, and the steps are as follows: Step 5, installing the anti-collision stones on both sides; the anti-collision stones on both sides are fixed by the corresponding reserved sleeve bolts of the lane plate (4), and UHPC high-performance concrete is injected into the sleeve to ensure a firm connection; Step 6: constructing reinforced concrete pavement and asphalt pavement layers between the anti-collision stone paving on both sides; Step 7: Complete the internal structure and road construction of the shield tunnel (1).

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