Bonded assembled tunnel segment, bonding method and supporting test assembly table

Abstract

The present invention relates to the field of segment assembly equipment for shield tunneling construction, in particular to a tunnel segment assembled by bonding, a bonding method and a supporting test assembly platform. It aims to solve the problems of low segment assembly accuracy and poor assembly effect in the prior art. The present invention includes bonding components provided at the joints of segments to achieve semi-rigid bonding successively, and the structures of the bonding components include plug-in bonding type, barbed reverse bonding type and partition bonding type respectively. The advantages are as follows: different bonding forms adapted to their respective structural properties can be realized during the assembly process, thereby forming a stable tunnel contour as a whole and effectively preventing deformation after long-term use.

Description

Technical Field

[0001] The present invention relates to the field of segment assembly equipment in shield tunneling construction, in particular to a tunnel segment assembled by bonding, a bonding method and a supporting test assembly platform. Background Art

[0002] During the shield tunneling construction process, as the shield machine excavates, advances and discharges muck, the excavated tunnel needs to be permanently supported by precast reinforced concrete segments outside the tunnel. The function of the segment erector is to accurately place the segments in the appropriate positions, form segment rings one by one and finally form a tunnel.

[0003] The segment assembly method is as follows:

[0004] 1. Ring assembly method: After the shield propulsion is completed, the segments are quickly assembled into a ring. Except for special occasions, mostly staggered joint assembly is adopted. In the case of deviation correction or construction of sharp curves, sometimes circumferential joint assembly is adopted.

[0005] 2. Assembly sequence: Generally, start from the standard (Type A) segment at the lower part, alternately install the standard segments on the left and right sides in turn, then assemble the adjacent (Type B) segments, and finally install the wedge-shaped (Type K) segments.

[0006] 3. Shield jack operation: During assembly, the jacks cannot be retracted simultaneously, and the shield jacks should be retracted separately according to the assembly sequence of the segments (1).

[0007] 4. Tighten the connecting bolts: First tighten the circumferential (between segments) and then the axial (between rings) connecting bolts.

[0008] At the present stage, the staff believes that the segment assembly method has the following problems: The fixing form is single. Even in the case of staggered joint installation, there are still problems such as unstable installation, low bonding force between segments, low assembly accuracy and poor assembly effect. Summary of the Invention

[0009] The purpose of the present invention is to solve the problems of low segment assembly accuracy and poor assembly effect in the prior art.

[0010] The specific solution of the present invention is as follows: The segment includes an arc-shaped inner side and an outer side. The formed sleeve segments can be combined into a single-layer segment ring. There is a screw riveting and positioning between the segments. An inserted guiding column for connecting the two is provided between the segment rings. A concave-convex connecting platform is provided on the contact surface between the segments. An anti-thorn bonding connection is provided on the connecting platform. A partition bonding connection is provided on the contact surface of the screw riveting and positioning. An inserted bonding is provided between the guiding column and the corresponding guiding hole. The starting station of the inserted bonding is at the terminal station of the anti-thorn bonding connection. The partition bonding connection is circular and arranged on the inner hole edge of the riveting hole. On the active bonding ring on one side, a ring-shaped scraper made of metal is provided on the circle formed by the corresponding outer tangent points of each cross-section. Correspondingly, a scraping groove with a thickness lower than the periphery is provided on the passive bonding ring on the other side. The outer diameter of the active bonding ring is smaller than the outer diameter of the passive bonding ring and larger than the inner diameter of the passive bonding ring.

[0011] In specific implementation, at the corresponding position at the bottom of the ring-shaped scraper, its thickness is greater than the thickness of the scraping groove and smaller than the thickness of the adjacent material.

[0012] In specific implementation, the anti-thorn bonding connection includes spines provided on the convex part of the connecting platform. The direction of the spines is consistent with the installation direction. Correspondingly, an adhesive material cavity is provided in the concave part of the connecting platform. The adhesive material cavity is filled with an adhesive material. The working position of the end spine is the terminal station. The spines are made of an elastic material, and scrapers are arranged on the edge. The adhesive material cavity is provided with scraper puncture holes.

[0013] In specific implementation, the inserted connection includes a conical extrusion platform provided at the top of the guiding column and an adhesive filling cavity provided at the end of the guiding hole. On the cavity wall of the filling cavity, a scraping groove with a thickness lower than the periphery is provided at the terminal of the clamping position.

[0014] In specific implementation, sealing rings are provided on both sides of the installation position of the riveting screw.

[0015] A method for installing a segment ring, for installing the tunnel segments assembled by bonding as described above, includes the following steps:

[0016] (1) Horizontal displacement: Use a segment installation machine to grab the segment and move it to the position to be installed under the drive of the positioning mechanism;

[0017] (2) Rotate to a suitable radian: The segment installation machine rotates and rotates to a suitable angle, presenting a spiral working position with the upper-layer segment, and the corresponding guiding column and guiding hole have matching form and dimension;

[0018] (3) Secondary horizontal displacement: The guiding column is pushed into the guiding hole until the corresponding adhesive filling cavity is squeezed and broken after positioning, forming a bond between the segments (1);

[0019] (4)Repeated horizontal displacement: After the end of step (2) and before the adhesive solidifies, drive the segment to retreat and then advance along the guiding direction to activate the ratchet to scrape the corresponding adhesive filler, so as to realize the bonding of the convex-concave connecting platform between segments;

[0020] (5)Riveting between segments: Arrange screw riveting between adjacent segments forming a convex-concave connecting platform. During the riveting process, the adhesive filling cavity arranged on the outer surface of the threaded surface fit is squeezed and broken to form a threaded surface bond.

[0021] The gap time between steps (4) and (5) is greater than 20 minutes.

[0022] A test assembly table, which is used to measure the bonding performance of tunnel segments assembled by bonding, includes a test assembly table frame. An elevating test column is hung on the test assembly table frame. A displacement driving mechanism for driving the test column to achieve displacement is provided on the test column. A simulation cutter head is provided at the bottom of the test column. The bottom of the simulation cutter head matches the shape of the bottom of the guiding column. A square column is provided in the middle. A ratchet is provided on one side of the square column, and the ratchet matches the shape of the reverse barb bonding connection. A simulation screw with the same shape and position dimensions as the screw is provided at the bottom of the simulation cutter head; A sliding plug-in bonding test mechanism, a set of partition bonding test mechanism and a surface contact reverse barb bonding test mechanism are provided on the test assembly table frame; The sliding plug-in bonding test mechanism includes a sliding push plate connected to the test assembly table frame through a sliding pair. A hydraulic telescopic column is installed on the side of the sliding push plate. The other end of the hydraulic telescopic column is connected to a test cylinder. The inner diameter of the test cylinder is adapted to the end size of the plug-in guiding column, and an adhesive filling cavity and a scraping groove are arranged inside; The partition bonding test mechanism includes a dismountable simulation screw ring. The length of the simulation screw ring is greater than the mating length of the simulation screw, and an adhesive filling cavity and a scraping groove are arranged inside; The reverse barb bonding test mechanism includes an adhesive filling cavity and a scraping groove arranged in the corresponding surface of the table frame. A tension gauge hook is provided on the simulation screw on the square column and the sliding push plate. An installation shaft matching the simulation screw ring is preset below the guiding column.

[0023] In specific implementation, a temperature measurement terminal is arranged in each adhesive filling cavity, and the temperature measurement terminal is externally connected to a temperature measurement element.

[0024] In specific implementation, the external structure where each adhesive filling cavity is located is made of acrylic material.

[0025] The beneficial effects of the present invention are as follows:

[0026] Bonding methods matching the contact conditions are provided at the joints between segments and pipe rings, and the working positions and cooling time are reasonably utilized. On the one hand, high-precision installation is realized, and on the other hand, the service life of the bonding is prolonged;

[0027] It also involves a supporting test system, which can perform bonding simulations for different adhesives and on-site mechanical conditions to determine the optimal pressure conditions, cooling time, and metering distribution of the adhesive. A temperature and pressure measuring device is installed in the test system to detect the extension of the adhesive in the laboratory state under different conditions in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the explosion effect during the assembly between the pipe coil and the segment of the present invention;

[0029] Figure 2 is Figure 1 the front view of the components in the structure;

[0030] Figure 3 is Figure 1 the top view of the components in the structure;

[0031] Figure 4 is the perspective view of the test assembly bench;

[0032] Figure 5 is the perspective view of the test assembly bench from another angle;

[0033] Figure 6 is Figure 4 the front view of the structure shown;

[0034] Figure 7 is Figure 4 the top view of the structure shown;

[0035] Figure 8 is Figure 4 the left view of the structure shown;

[0036] Figure 9 is Figure 4 the right view of the structure shown after the assembly of the simulated coil and the simulated screw;

[0037] Figure 10 is the schematic structural diagram of the adhesive filling cavity corresponding to the ratchet;

[0038] Figure 11 is the schematic structural diagram of the adhesive filling cavity corresponding to the guide post;

[0039] Figure 12 is the schematic structural diagram of the adhesive filling cavity corresponding to the riveting and positioning of the screw;

[0040] Names of each component in the figure: 1. Segment; 2. Segment ring; 3. Screw riveting positioning; 4. Convex surface; 5. Concave surface; 6. Ratchet tooth; 7. Guide post; 8. Fitting part of the guide post; 9. Test assembly bench; 10. Sliding push plate; 11. Positioning pin between the sliding push plate and the test assembly bench; 12. Lifting test column; 13. Square column; 14. Simulated thread ring; 15. Simulated screw; 16. Ratchet teeth on the square column; 17. Contact surface; 18. End of the simulated guide post; 19. Fitting part of the simulated screw; 20. Slideway of the moving pair; 21. Fixed end of the test assembly bench; 22. Displacement driving mechanism; 23. Adhesive filling cavity corresponding to the ratchet tooth; 24. Adhesive filling cavity corresponding to the guide post; 25. Adhesive filling cavity corresponding to the screw riveting positioning; 26. Scraper corresponding to the screw riveting positioning; 27. Ring-shaped scraper installed at the end of the guide post; 28. Hydraulic telescopic column. Detailed implementation manners

[0041] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustration and explanation of the present invention, and are not used to limit the present invention. Embodiment 1

[0042] A tunnel segment assembled by bonding, referring to Figures 1 to 12 , it is assumed to include an arc-shaped inner side surface and an outer side surface. The segment linings 1 can be combined into a single-layer segment ring 2. There is a screw riveting positioning 3 between the segment linings 1, and an inserted guide post 7 connecting the two is provided between the segment rings 2. A convex-concave connecting platform is provided on the contact surface 17 between the segment linings 1. An anti-thorn bonding connection is provided on the connecting platform. A partition bonding connection is provided on the contact surface 17 of the screw riveting positioning 3. An inserted bonding is provided between the guide post 7 and the corresponding guide hole. The starting station of the inserted bonding is at the terminal station of the anti-thorn bonding connection. The partition bonding connection is circular, arranged on the inner hole edge of the riveting hole. On the active bonding ring on one side, a ring-shaped scraper made of metal is provided on the circle formed by the corresponding outer tangent points of each cross-section thereof. Correspondingly, on the passive bonding ring on the other side, a scraping groove with a thickness lower than the periphery and adapted to the scraper is provided. The outer diameter of the active bonding ring is smaller than the outer diameter of the passive bonding ring and larger than the inner diameter of the passive bonding ring.

[0043] At the corresponding position at the bottom of the ring-shaped scraper, its thickness is greater than the thickness of the scraping groove and smaller than the thickness of the adjacent material.

[0044] The reverse-spike adhesive connection includes a ratchet 6 provided on the convex part of the connection table. The direction of the ratchet 6 is consistent with the installation direction. Correspondingly, an adhesive material cavity is provided in the concave part of the connection table. The adhesive material cavity is filled with an adhesive material. The working position of the end ratchet 6 is the terminal working position. The ratchet 6 is made of an elastic material, and a scraper is arranged on the edge. The adhesive material cavity is provided with a scraper puncture hole. When the ratchet 6 is lifted up in the reverse direction, the scraper pierces through the scraper puncture hole, and the corresponding adhesive flows out.

[0045] The plug-in connection includes a conical extrusion table provided at the top of the guide post 7 and an adhesive filling cavity provided at the end of the guide hole. On the cavity wall of the filling cavity, a scraping groove with a thickness lower than the periphery is provided at the terminal of the clamping position.

[0046] During the working process, the adhesives corresponding to the plug-in connection, the reverse-spike adhesive connection, and the screw riveting are pre-embedded in the material in advance, and then are punctured along the installation sequence of the segment 1, and the adhesive flows out, realizing effective adhesion of the corresponding contact surface 17. In this example, the pressure condition of the adhesive can be pre-set, and the adhesive with sufficient pressure is filled and formed.

[0047] Sealing rings are provided on both sides of the installation position of the riveting screw. So that the adhesive material will not overflow after gushing out.

[0048] A method for installing a segment ring 2, for installing and bonding assembled tunnel segments, includes the following steps:

[0049] (1) Horizontal displacement: Use the segment installation machine to grab the segment 1 and move it to the position to be installed under the drive of the positioning mechanism;

[0050] (2) Rotate to a suitable radian: The segment installation machine rotates and rotates to a suitable angle, forming a spiral working position with the upper layer segment 1, and the corresponding guiding columns and guiding holes have matching form and position dimensions;

[0051] (3) Secondary horizontal displacement: The guiding column is pushed into the guiding hole until the corresponding adhesive filling cavity is squeezed and broken after positioning, forming bonding between segments;

[0052] (4) Repeated horizontal displacement: After the end of step (2) and before the adhesive condenses, drive the segment 1 to retreat and then advance along the guiding direction, activating the ratchet 6 to scrape and break the corresponding adhesive filler, realizing the bonding of the convex and concave connection tables between the segments 1;

[0053] (5) Riveting between segments: Screw riveting is arranged between adjacent segments 1 forming the convex and concave connection tables. During the riveting process, the adhesive filling cavity arranged on the outer surface of the threaded surface fit is squeezed and broken, forming bonding of the threaded surface.

[0054] The gap time between steps (4) and (5) is greater than 20 minutes. This facilitates the stable assembly between segment rings 2 and the circumferential assembly between segments 1, and further forms the assembly connection between segments 1.

[0055] It also relates to a test assembly table for measuring the bonding performance of tunnel segments bonded and assembled. It includes a test assembly table frame 9, on which a lifting test column 12 is hung. A displacement driving mechanism for driving the displacement of the test column is provided on the test column. A simulation cutter head is provided at the bottom of the test column. The bottom of the simulation cutter head matches the shape of the bottom of the guiding column 7. A square column 13 is provided in the middle. A ratchet 6 is provided on one side of the square column 13, and the ratchet 6 matches the shape of the reverse barb bonding connection. A simulation screw 15 with the same shape and dimension as the screw is provided at the bottom of the simulation cutter head; A sliding plug-in bonding test mechanism, a sleeve-type partition bonding test mechanism, and a surface-contact reverse barb bonding test mechanism are provided on the test assembly table frame 9; The sliding plug-in bonding test mechanism includes a sliding push plate 10 connected to the test assembly table frame 9 through a sliding pair. A hydraulic telescopic column is installed on the side of the sliding push plate 10, and the other end of the hydraulic telescopic column is connected to a test cylinder. The inner diameter of the test cylinder is adapted to the end dimension of the plug-in guiding column 7, and an adhesive filling cavity and a scraping groove are provided inside it; The partition bonding test mechanism includes a dismountable simulation screw ring. The length of the simulation screw ring is greater than the mating length of the simulation screw 15, and an adhesive filling cavity and a scraping groove are provided inside it; The reverse barb bonding test mechanism includes an adhesive filling cavity and a scraping groove provided in the corresponding surface of the table frame. Tensile force gauge hooks are provided on the simulation screw 15 on the square column 13 and on the sliding push plate 10.

[0056] Temperature measurement terminals are provided in each adhesive filling cavity, and the temperature measurement terminals are externally connected to temperature measurement elements.

[0057] The external structure where each adhesive filling cavity is located is made of acrylic material.

[0058] During the working process of the test assembly table, first, the fixed end of the test assembly table frame 9 is used to fix the test assembly table frame 9. This fixing form can be in the laboratory or in the open area of the construction site. After that, guide columns corresponding to the test size are installed on the test assembly table frame 9. At this time, on the sliding push plate 10 at the bottom, the positioning pin is in a clamped state, and the sliding push plate 10 does not move. At the beginning of the test, the horizontal hydraulic cylinder advances forward, and the test cylinder at its end simulates the cooperation with the guide column and is pushed to the coaxial position. After that, the guide column on the sliding push plate 10 is displaced downward under the drive of the hydraulic cylinder at the top until the guide column is pushed into the test cylinder at the end, realizing the simulated cooperation, further realizing the extrusion of the corresponding adhesive and the simulation of bonding. Then, the positioning pin between the sliding push plate 10 and the test assembly table frame 9 is moved to the non-locked position, and the sliding push plate 10 can continue to displace downward together with the guide column. During the subsequent displacement, the ratchet 6 contacts the corresponding contact surface 17, realizing the simulation of the cooperation between the concave surface 5 and the convex surface 4, and further realizing the extrusion of the material in the adhesive filling cavity corresponding to the ratchet 6, so as to observe the bonding material situation at this position. Finally, a simulated screw ring 14 is installed at the bottom of the test cylinder, and then a simulated screw 15 is installed at the bottom of the simulated screw ring 14 to simulate the installation situation of the screw riveting positioning 3. Furthermore, observe the situation of the partition bonding connection triggered during the positioning process of the screw riveting positioning 3. During the whole process, the transparent material can observe and measure the ductility of the adhesive, and determine the design of the contact surface 17 area and the magnitude of the adhesive bonding force by judging the ductility.

[0059] During the process, the top of the simulated screw ring 14 is assembled below the guide column, and an installation shaft matched with the simulated screw ring 14 is preset below the guide column. In this embodiment, the displacement driving mechanism is a hydraulic driving mechanism.

[0060] The function of the dynamometer hook is to install the dynamometer, observe the force condition of the test component, and calculate the mechanical performance of different adhesives at each position in the actual situation proportionally according to the deformation under what kind of applied force.

[0061] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A test assembly table for measuring the bonding performance of bonded and assembled tunnel segments, Characterized in that: It includes a test assembly table frame (9), on which a lifting test column (12) is hung. A displacement driving mechanism for driving the test column to achieve displacement is provided on the test column. The segment (1) includes an arc-shaped inner side and an outer side. The sleeve segments (1) can be combined into a single-layer segment (1) ring. A screw riveting positioning (3) is provided between the segments (1). An inserted guiding column (7) for connecting the two is provided between the segment rings (2). A simulation cutter head is provided at the bottom of the test column. The bottom of the simulation cutter head matches the shape of the bottom of the inserted guiding column (7). A square column (13) is provided in the middle. A ratchet tooth (6) is provided on one side of the square column (13). A convex-concave connecting platform is provided on the contact surface (17) between the tunnel segments (1). An anti-thorn bonding connection is provided on the connecting platform. The ratchet tooth (6) matches the shape of the anti-thorn bonding connection. A simulation screw (15) with the same shape and position dimensions as the screw is provided at the bottom of the simulation cutter head; A sliding inserted bonding test mechanism, a sleeved partition bonding test mechanism and a surface contact anti-thorn bonding test mechanism are provided on the test assembly table frame (9); The sliding inserted bonding test mechanism includes a sliding push plate (10) connected to the test assembly table frame (9) through a sliding pair. A hydraulic telescopic column is installed on the side of the sliding push plate (10). The other end of the hydraulic telescopic column is connected to a test cylinder. The inner diameter of the test cylinder is adapted to the end size of the inserted guiding column (7). An adhesive filling cavity and a scraping groove are provided inside it; The partition bonding test mechanism includes a detachable simulation screw ring. The length of the simulation screw ring is greater than the mating length of the simulation screw (15). An adhesive filling cavity and a scraping groove are provided inside it; The anti-thorn bonding test mechanism includes an adhesive filling cavity and a scraping groove provided in the corresponding surface of the table frame. A tensile force gauge hook is provided on the simulation screw (15) on the square column (13) and the sliding push plate (10). An installation shaft matching the simulation screw ring (14) is pre-arranged below the inserted guiding column (7).

2. The test assembly table according to claim 1, Characterized in that: Temperature measurement terminals are provided in each adhesive filling cavity, and the temperature measurement terminals are externally connected to temperature measurement elements.

3. The test assembly table according to claim 1, Characterized in that: The external structure where each adhesive filling cavity is located is made of acrylic material.

4. A bonded and assembled tunnel segment suitable for being measured by the test assembly table according to any one of claims 1 to 3. The segment (1) includes an arc-shaped inner side and an outer side. The sleeve segments (1) can be combined into a single-layer segment (1) ring. A screw riveting positioning (3) is provided between the segments (1). An inserted guiding column (7) for connecting the two is provided between the segment rings (2). Characterized in that: On the contact surface (17) between the segments (1), there are convex-concave connecting platforms. On the connecting platforms, there are reverse barb bonding connections. On the contact surface (17) of the screw riveting positioning (3), there are partition bonding connections. Between the plug-in guiding columns (7) and the corresponding guiding holes, there are plug-in bondings. The starting station of the plug-in bonding is at the terminal station of the reverse barb bonding connection. The partition bonding connection is circular and arranged on the inner hole edge of the riveting hole. On the active bonding circle on one side, there is a ring-shaped scraper made of metal on the circle formed by the corresponding outer tangent points of each cross-section. Correspondingly, on the passive bonding circle on the other side, there is a scraping groove with a thickness lower than the periphery and adapted to the scraper. The outer diameter of the active bonding circle is smaller than the outer diameter of the passive bonding circle and larger than the inner diameter of the passive bonding circle.

5. The bonded and assembled tunnel segment according to claim 4, characterized in that: At the corresponding position at the bottom of the ring-shaped scraper, its thickness is greater than the thickness of the scraping groove and less than the thickness of the adjacent material.

6. The bonded and assembled tunnel segment according to claim 4, characterized in that: The reverse barb bonding connection includes the ratchet teeth (6) arranged on the convex part of the connecting platform. The direction of the ratchet teeth (6) is consistent with the installation direction. Correspondingly, there is a bonding material cavity in the concave part of the connecting platform. The bonding material cavity is filled with bonding material. The working position of the end ratchet teeth (6) is the terminal station. The ratchet teeth (6) are made of elastic material, and scrapers are arranged on the edge. The bonding material cavity is provided with scraper puncture holes.

7. The bonded and assembled tunnel segment according to claim 4, characterized in that: The plug-in connection includes a conical extrusion platform arranged at the top of the plug-in guiding column (7) and a bonding agent filling cavity arranged at the end of the guiding hole. On the cavity wall of the filling cavity, at the terminal of the clamping position, there is a scraping groove with a thickness lower than the periphery.

8. The bonded and assembled tunnel segment according to claim 4, characterized in that: Sealing rings are arranged on both sides of the installation position of the screw.

9. A method for installing a segment ring, installing the bonded and assembled tunnel segment according to claim 4, characterized in that, including the following steps: (1) Horizontal displacement: Use the segment installation machine to grab the segment (1) and move it to the position to be installed under the drive of the positioning mechanism; (2) Rotate to a suitable radian: The segment installation machine rotates and rotates to a suitable angle, presenting a spiral working position with the upper layer segment (1), and the shape and dimension of the corresponding guiding column and guiding hole are matched; (3) Secondary horizontal displacement: The guiding column is pushed into the guiding hole until the corresponding bonding agent filling cavity is squeezed and broken after positioning, forming a bond between the segments (1); (4) Repeated horizontal displacement: After the end of step (2) and before the bonding agent solidifies, drive the segment (1) to retreat and then advance along the guiding direction to activate the ratchet teeth (6) to scrape the corresponding bonding agent filler, realizing the bonding of the convex-concave connecting platform between the segments (1); (5) Riveting between segments: Screw riveting is arranged between the adjacent segments (1) forming the convex-concave connecting platform. During the riveting process, the bonding agent filling cavity arranged on the outer surface of the threaded surface fit is squeezed and broken, forming a bond on the threaded surface.

10. The segment ring installation method according to claim 9, characterized in that: the gap time between the steps (4) and (5) is greater than 20 minutes.

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