Shield underwater receiving section lining ring segment and supporting structure thereof
By designing splicing blocks and support structures, the leakage and anti-float of shield pipe sheets when received underwater is solved, higher force transmission reliability and structural stability are achieved, and the safety of tunnel projects is improved.
Patent Information
- Application Number
- CN202421572092.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-07-04
AI Technical Summary
The existing shield pipe sheet cannot effectively prevent leakage and anti-float when received underwater, and the force transmission reliability is insufficient, making it difficult to meet the needs of high water pressure environments.
A shield-structured underwater receiving interval lining ring pipe sheet and its support structure are designed. By splicing capping blocks, adjoining blocks and standard blocks of different shapes, they are connected by circumferential and longitudinal bolts, combined with EPDM rubber gaskets and ring seam transmission. Force lining material increases structural stability and sealing, and provides concrete guides, guide rails, wooden wedges or steel wedges and wire ropes at the bottom to provide support.
It effectively reduces water seepage problems, improves the reliability of force transmission between pipe segments, prevents damage and floatation of pipe segments, and improves the overall safety of tunnel projects.
Smart Images
Figure CN222228560U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of shield construction, in particular to a shield underwater receiving interval lining ring segment and a supporting structure thereof. Background Art
[0002] At present, with the development of cities, shield tunnels will inevitably pass through coastal sand-filled water-rich strata. As the core component of shield tunnels, segments are used to resist external water and soil loads and ensure the overall safety of the tunnel. At present, there are few designs for the lining segment structure of the shield underwater receiving section in China. The original shield segments cannot meet the requirements of preventing segment leakage caused by the high water pressure faced during shield underwater receiving. The reliability of force transmission and the need for anti-floating need to be solved urgently. Utility Model Content
[0003] In view of the problems existing in the above-mentioned prior art, the utility model aims to provide a shield underwater receiving section lining ring segment and its supporting structure to reduce water seepage of the segment during underwater receiving of the shield, prevent the segment from floating up, and improve the reliability of force transmission in the shield tunnel.
[0004] In order to achieve the above-mentioned purpose, the utility model proposes a shield underwater receiving section lining ring segment, comprising a multi-ring segment spliced in sequence along the longitudinal direction of the tunnel, each ring segment is formed by splicing a capping block, two adjacent blocks and three standard blocks, the capping block, the adjacent blocks and the standard blocks are all splicing blocks of different shapes, and the three standard blocks are sequentially assembled to form a lower semi-ring structure, the capping block is located at the top of the segment, and the two sides of the capping block are respectively spliced and fixed with the two ends of the lower semi-ring structure through an adjacent block; annular bolt holes are reserved at both ends of the splicing block in the circumferential direction, the annular bolt holes are arc-shaped holes that penetrate the corresponding end faces and inner wall faces of the splicing blocks, plastic sleeves are pre-embedded in the annular bolt holes, the plastic sleeves on the two adjacent splicing blocks correspond to each other one by one, and are fixedly connected by annular bent bolts, the annular bent bolts are penetrated in the corresponding two plastic sleeves, and both ends of the annular bent bolts are penetrated through the plastic sleeves, and bolt sealing rings, steel washers and nuts are sequentially mounted, thereby realizing the connection and fixation of the two splicing blocks;
[0005] Longitudinal bolt holes are reserved at both longitudinal ends of the splicing block. The longitudinal bolt holes are arc-shaped holes that penetrate the corresponding end faces and inner wall faces of the splicing block. Plastic sleeves are embedded in the longitudinal bolt holes. The plastic sleeves on the two adjacent segments correspond to each other and are fixedly connected by longitudinal bent bolts. The longitudinal bent bolts are inserted into the corresponding two plastic sleeves, and both ends of the longitudinal bent bolts pass through the plastic sleeves, and are sequentially fitted with bolt sealing rings, steel washers and nuts, so as to realize the connection and fixation of the two ring segments. Splicing grooves and splicing protrusions are also provided between the two adjacent ring segments, and the two form a mortise and tenon structure to facilitate positioning and assembly, and to improve the bite force between the two adjacent segments, thereby improving the structural stability and reliability.
[0006] A longitudinal segment joint is reserved between the standard blocks, between the capping block and the adjacent block, and between the adjacent block and the standard block. An EPDM rubber elastic sealing pad is arranged in the longitudinal segment joint. An annular segment joint is reserved between two adjacent segments. An annular segment joint is arranged in the annular segment joint. The EPDM rubber elastic sealing pad and the annular segment joint are both fixed with a single-component flame-retardant chloroprene-phenolic adhesive. This ensures reliable force transmission at the joint and prevents groundwater leakage.
[0007] In the above scheme: the openings of the annular bolt holes and the longitudinal bolt holes are both in the shape of trumpets opening outward, the cross-section of the bolt sealing ring is triangular, the bolt sealing ring is tightly fitted on the corresponding bolt, and sealed at the opening, ensuring the installation stability of the bolt sealing ring and forming an effective seal on the plastic sleeve, which can prevent water vapor and the like from entering the plastic sleeve to corrode the bolt.
[0008] In the above scheme: the exposed parts of the annular bent bolts and the longitudinal bent bolts are provided with an anti-corrosion coating, and the thickness of the anti-corrosion coating is not less than 8 microns, thereby increasing its service life.
[0009] In the above scheme: the standard block is a rectangular block, the adjacent block is a right-angled trapezoidal block, and the capping block is an isosceles trapezoidal block, which is easy to process and adopts a staggered assembly method to ensure good stability of the entire ring of segments.
[0010] The utility model also proposes a supporting structure for a shield underwater receiving section lining ring segment, including the above-mentioned shield underwater receiving section lining ring segment, and also including a concrete guide platform located at the bottom of the segment and a guide platform rail arranged on the concrete guide platform, at least two wooden wedges or steel wedges are arranged between the bottom of the single-ring segment and the guide platform rail, the wooden wedges or steel wedges are in a pit shape, and the wooden wedges or steel wedges are arranged longitudinally along the segment, guide platform steel plates are pre-embedded on both sides of the top surface of the concrete guide platform, and the single-ring segment is also equipped with at least two steel wire ropes, the steel wire ropes are arranged around the outer circle of the segment, and both ends of the steel wire ropes are pulled and fixed on the guide platform steel plates on the corresponding sides.
[0011] In the above scheme: support columns for lateral support are also provided between the outside of the single-ring segment and the concrete guide platform, and the support columns are made of section steel or I-beam.
[0012] The beneficial effects of the utility model are:
[0013] It reduces the difficulty of assembling the lining ring segments in the underwater receiving section of the shield machine, effectively reduces the problem of water seepage between the spliced segments and between the rings, ensures that the tunnel segments will not be damaged, ensures reliable force transmission between the shield tunnel rings, and improves the overall safety of the tunnel project; in the segment support structure, wooden wedges or steel wedges can prevent the segments from sinking, and steel wire ropes can effectively prevent the segments from deflecting upward or floating. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is the structural diagram of the lining ring segment of the underwater receiving section of the shield.
[0015] Figure 2 yes Figure 1 A cross-sectional view of a ring.
[0016] Figure 3 It is a standard block diagram.
[0017] Figure 4 It is a capping block diagram.
[0018] Figure 5 It is an adjacent block diagram.
[0019] Figure 6 This is the connection diagram of the annular segment.
[0020] Figure 7 It is a large-scale drawing of the end of a circumferential bent bolt or a longitudinal bent bolt.
[0021] Figure 8 This is a large-scale drawing of the pipe segment joints.
[0022] Fig. 9 It is a schematic diagram of the splicing of rings and ring segments.
[0023] Fig.10 It is a schematic diagram of the layout of wooden wedges or steel wedges.
[0024] Fig.11 It is a schematic diagram of the segment support. DETAILED DESCRIPTION
[0025] like Figure 1 As shown in FIG. 11 , a shield underwater receiving section lining ring segment is mainly composed of multiple ring segments spliced in sequence along the longitudinal direction of the tunnel. Each ring segment is formed by splicing a capping block 5, two adjacent blocks 4 and three standard blocks 3. The capping block 5, the adjacent blocks 4 and the standard blocks 3 are all splicing blocks of different shapes. The three standard blocks 3 are sequentially assembled to form a lower semi-ring structure. The capping block 5 is located at the top of the segment. Both sides of the capping block 5 are spliced and fixed to the two ends of the lower semi-ring structure through an adjacent block 4.
[0026] Annular bolt holes are reserved at both circumferential ends of the splicing block. The annular bolt holes are arc-shaped holes that penetrate the corresponding end faces and inner wall surfaces of the splicing block. Plastic sleeves 10 are embedded in the annular bolt holes. The plastic sleeves 10 on the two adjacent splicing blocks correspond to each other one by one and are fixedly connected by annular bent bolts 1. The annular bent bolts 1 are passed through the corresponding two plastic sleeves 10, and both ends of the annular bent bolts 1 pass through the plastic sleeves 10, and are sequentially mounted with bolt sealing rings 13, steel washers 12 and nuts 11, thereby realizing the connection and fixation of the two splicing blocks.
[0027] Longitudinal bolt holes are reserved at both longitudinal ends of the splicing block. The longitudinal bolt holes are arc-shaped holes that penetrate the corresponding end faces and inner wall faces of the splicing block. Plastic sleeves 10 are embedded in the longitudinal bolt holes. The plastic sleeves 10 on the two adjacent pipe segments correspond to each other one by one and are fixedly connected by longitudinal bent bolts 2. The longitudinal bent bolts 2 are inserted into the corresponding two plastic sleeves 10, and both ends of the longitudinal bent bolts pass through the plastic sleeves 10, and bolt sealing rings 13, steel washers 12 and nuts 11 are sequentially mounted thereon, thereby realizing the connection and fixation of the two ring pipe segments.
[0028] A splicing groove 17 and a splicing protrusion 16 are also provided between two adjacent ring segments, which form a mortise and tenon structure to facilitate positioning and assembly, and to improve the bite force between the two adjacent segments, thereby improving the structural stability and reliability.
[0029] Grouting holes 9 are reserved at the centers of the standard blocks 3, the adjacent blocks 4 and the capping blocks 5 to facilitate the hoisting of the segments and the grouting behind the wall after the assembly is completed.
[0030] Longitudinal segment joints 14 are reserved between standard blocks 3 and standard blocks 3, between capping blocks 5 and adjacent blocks 4, and between adjacent blocks 4 and standard blocks 3. EPDM rubber elastic sealing pads are arranged in the longitudinal segment joints 14. Annular segment joints 15 are reserved between two adjacent ring segments. Annular segment joints 15 are arranged in annular segment joints 15. EPDM rubber elastic sealing pads and annular segment force transmission lining materials are both fixed with a single-component flame-retardant chloroprene-phenolic adhesive to ensure reliable force transmission at the joints and prevent groundwater leakage. In order to achieve better force transmission between segments and prevent leakage caused by misaligned joints in the segments, force transmission pads and waterproof materials are pasted between segment joints. The segment concrete adopts C50 high-strength concrete with a water resistance grade of P10.
[0031] Preferably, the openings of the annular bolt holes and the longitudinal bolt holes are both in the shape of trumpets opening outward, the cross-section of the bolt sealing ring 13 is triangular, the bolt sealing ring 13 is tightly fitted on the corresponding bolt and sealed at the opening, ensuring the installation stability of the bolt sealing ring 13 and forming an effective seal for the plastic sleeve 10, which can prevent water vapor and the like from entering the plastic sleeve 10 and corroding the bolts.
[0032] Preferably, the exposed parts of the annular bent bolts 1 and the longitudinal bent bolts 2 are provided with an anti-corrosion coating, and the thickness of the anti-corrosion coating is not less than 8 microns, thereby increasing their service life.
[0033] Preferably, the standard block 3 is a rectangular block, the adjacent block 4 is a right-angled trapezoidal block, and the capping block 5 is an isosceles trapezoidal block, which is easy to process and adopts a staggered assembly method to ensure good stability of the entire ring of segments.
[0034] Installation of segment structure:
[0035] 1) During the installation of the segments, reduce the cylinder pressure to prevent the shield machine from moving forward when assembling the segments. After all the cylinders in the installation area are in place, the segments can be installed.
[0036] 2) During construction, install the standard block 3 first, then the adjacent block 4, and finally the capping block 5 until all the assembled blocks are installed. The standard block 3, the adjacent block, and the capping block 5 are connected with 16 M30 annular bent bolts 1M30, and the bolt seals 13, steel washers 12 and nuts 11 at both ends are installed. After the bolts are installed, the exposed parts of the bolts should be sprayed for the second time in time, and the thickness of the secondary coating should ensure that the total coating thickness is not less than 8 microns. Keep the reserved longitudinal joints 14 between the segments dry, clean, solid and flat. Use a single-component flame-retardant chloroprene-phenolic adhesive to stick the EPDM rubber elastic sealing gasket to the longitudinal joints 14 around the segments to complete the assembly of the single-ring segments.
[0037] 3) Repeat step 1. For the next ring of segments, the segments between the rings are connected by longitudinal bent bolts 2M30, and the bolt seals 16, steel washers 12 and nuts 11 at both ends are installed. After the bolts are installed, the exposed parts of the bolts are sprayed for the second time in time. The thickness of the secondary coating should ensure that the total coating thickness is not less than 8 microns. Complete the assembly of the second ring of single segments and repeat step 3. Use a single-component flame-retardant chloroprene-phenolic adhesive to stick the annular joint force transmission lining material to the reserved annular assembly seam 15 between the rings to complete the assembly of the second ring of segments.
[0038] Repeat step 123 to complete the assembly of the lining ring segment structure of the underwater receiving section of the shield.
[0039] The utility model also proposes a support structure for a shield underwater receiving section lining ring segment, including the above-mentioned shield underwater receiving section lining ring segment, and also including a concrete guide platform 18 located at the bottom of the segment and a guide platform steel rail arranged on the concrete guide platform. At least two wooden wedges or steel wedges 19 are arranged between the bottom of the single-ring segment and the guide platform steel rail. The wooden wedges or steel wedges 19 are pit-shaped and arranged longitudinally along the segment. Both sides of the top surface of the concrete guide platform 18 are pre-embedded with guide platform steel plates. The single-ring segment is also equipped with at least two steel wire ropes 20, which are arranged around the outer circle of the segment, and both ends of the steel wire ropes 20 are pulled and fixed on the guide platform steel plates on the corresponding side. A support column 6 for lateral support is also arranged between the outside of the single-ring segment and the concrete guide platform, and the support column 6 is made of section steel or I-beam.
[0040] Specifically, when the segment is out of the shield tail, there is a 90mm gap between the guide rail and the segment, and 2-4 wooden wedges 19 or steel wedges are placed in each ring to prevent the segment from sinking.
[0041] After the shield tunnel passes through the wind shaft section and the pipe segment is out of the shield tail, support columns 6 are used to support both sides of the outer side of the pipe segment.
[0042] Fixing between two rings of segments: tighten the bolts between the segments in time, and use connecting strips to tighten the device in the hole.
[0043] After the segment is halfway out of the shield tail, the segment is immediately tightened in an annular direction with two passes of a steel wire rope 20 with a diameter of 16 mm. The steel wire rope 20 is fixed to the embedded steel plate of the guide platform to prevent the segment from deviating upward.
[0044] At the bottom of the pipe segment, elastic rubber sealing pads, water-swelling waterstop strips and other waterproof materials are pasted on the pipe segment for waterproofing, and the joints are sealed when necessary.
Claims
1. A shield underwater receiving section lining ring segment, comprising multiple ring segments spliced in sequence along the longitudinal direction of the tunnel, each ring segment being formed by splicing a capping block (5), two adjacent blocks (4) and three standard blocks (3), the capping block (5), the adjacent blocks (4) and the standard blocks (3) are all splicing blocks of different shapes, the three standard blocks (3) are sequentially assembled to form a lower semi-ring structure, the capping block (5) is located at the top of the segment, and both sides of the capping block (5) are spliced and fixed to the two ends of the lower semi-ring structure through an adjacent block (4), characterized in that: Annular bolt holes are reserved at both circumferential ends of the splicing block. The Annular bolt holes are arc-shaped holes that penetrate the corresponding end faces and inner wall faces of the splicing block. Plastic sleeves (10) are embedded in the Annular bolt holes. The plastic sleeves (10) on two adjacent splicing blocks correspond to each other one by one and are fixedly connected by Annular bent bolts (1). The Annular bent bolts (1) are inserted into the corresponding two plastic sleeves (10), and both ends of the Annular bent bolts (1) pass through the plastic sleeves (10), and are sequentially mounted with bolt sealing rings (13), steel washers (12) and nuts (11), thereby realizing the connection and fixation of the two splicing blocks. Longitudinal bolt holes are reserved at both longitudinal ends of the splicing block. The longitudinal bolt holes are arc-shaped holes that penetrate the corresponding end faces and inner wall faces of the splicing block. Plastic sleeves (10) are embedded in the longitudinal bolt holes. The plastic sleeves (10) on two adjacent pipe segments correspond to each other and are fixedly connected by longitudinal bent bolts (2). The longitudinal bent bolts (2) are inserted into the corresponding two plastic sleeves (10), and both ends of the longitudinal bent bolts (2) pass through the plastic sleeves (10). Bolt sealing rings (13), steel washers (12) and nuts (11) are sequentially mounted thereon, thereby realizing the connection and fixation of two ring pipe segments. A splicing groove (17) and a splicing protrusion (16) are also provided between two adjacent ring pipe segments, and the two form a mortise and tenon structure to facilitate positioning and assembly. A longitudinal segment joint seam (14) is reserved between the standard blocks (3) and the standard blocks (3), between the capping block (5) and the adjacent block (4), and between the adjacent block (4) and the standard block (3). An EPDM rubber elastic sealing pad is arranged in the longitudinal segment joint seam (14). An annular segment joint seam (15) is reserved between two adjacent segments. An annular seam force transmission lining material is arranged in the annular segment joint seam (15). The EPDM rubber elastic sealing pad and the annular seam force transmission lining material are both bonded and fixed by a single-component flame-retardant chloroprene-phenolic adhesive.
2. The shield underwater receiving section lining ring segment according to claim 1 is characterized in that: The openings of the annular bolt holes and the longitudinal bolt holes are both in the shape of trumpets opening outwards, the cross section of the bolt sealing ring (13) is triangular, the bolt sealing ring (13) is tightly sleeved on the corresponding bolt and sealed at the opening.
3. The shield underwater receiving section lining ring segment according to claim 2 is characterized in that: The exposed parts of the annular bent bolts (1) and the longitudinal bent bolts (2) are both provided with an anti-corrosion coating, and the thickness of the anti-corrosion coating is not less than 8 microns.
4. The shield underwater receiving section lining ring segment according to claim 1 is characterized in that: The standard block (3) is a rectangular block, the adjacent block (4) is a right-angled trapezoidal block, and the capping block (5) is an isosceles trapezoidal block.
5. A support structure for lining ring segments in underwater receiving section of a shield machine, characterized in that: It comprises the shield underwater receiving section lining ring segment as described in any one of claims 1 to 4, and also comprises a concrete guide platform (18) located at the bottom of the segment and a guide platform rail arranged on the concrete guide platform, at least two wooden wedges or steel wedges (19) are arranged between the bottom of the single-ring segment and the guide platform rail, the wooden wedges or steel wedges (19) are pit-shaped, and the wooden wedges or steel wedges (19) are arranged longitudinally along the segment, and guide platform steel plates are pre-embedded on both sides of the top surface of the concrete guide platform (18), and the single-ring segment is also equipped with at least two steel wire ropes (20), the steel wire ropes (20) are arranged around the outer circle of the segment, and both ends of the steel wire ropes (20) are pulled and fixed on the guide platform steel plates on the corresponding sides.
6. The support structure of the lining ring segment of the underwater receiving section of the shield according to claim 5 is characterized by: A support column (6) for lateral support is also provided between the outside of the single-ring segment and the concrete guide platform, and the support column (6) is made of section steel or I-beam.