Connection structure between subway shield tunnel and station

Abstract

This utility model relates to the field of subway construction technology, specifically a connection structure between a subway shield tunnel and a station. It includes: an annular steel plate, fixedly installed on the inner annular surface and the annular side end face of the station end wall; and connecting segments, located on the inner side of the station end wall, fixedly connected to the shield tunnel segments and further fixedly connected to the station end wall via bolts. This structure effectively prevents water leakage at the connection between the tunnel and the station, and simplifies the construction of the tunnel-station connection, reducing construction costs and improving construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of subway construction technology, and in particular to a connection structure between a subway shield tunnel and a station. Background Technology

[0002] With the development of science and technology, more and more tunnels are being constructed using the shield tunneling method, which offers higher mechanization and efficiency. This is especially true for urban rail transit, where single-tunnel, single-track shield tunneling has become the preferred method. Urban rail transit stations are typically 2-3 story, large-span structures. Currently, the shield tunnel and station structure are connected at the station platform level via a post-cast ring beam.

[0003] The station structure employs cast-in-place concrete construction, while the tunnel lining segments are precast concrete structures. Typically, after the tunnel section is excavated and the concrete lining segments within the station end wall area are removed, a cast-in-place concrete ring beam (post-cast ring beam 1) is then installed between the station structure and the tunnel lining segments. The post-cast ring beam includes anchor bars and the cast-in-place ring beam itself, connecting the tunnel lining segments and the station structure. Based on practical engineering experience, the following problems exist with using a post-cast ring beam at the connection between the subway shield tunnel and the station:

[0004] First, post-cast ring beams are generally circular structures with dense reinforcement, making the pouring and curing of concrete inside the hole more difficult. This often results in cold joints, inadequate compaction, and honeycomb-like pitting in the post-cast ring beams, causing water leakage in the structure itself.

[0005] Secondly, the bonding between cast-in-place concrete and precast concrete is poor. Although the post-cast ring beam can be connected to the segments using bolts or anchor bars, due to the limitations of the curing conditions inside the tunnel, cracks are very likely to appear at the joint between the segments and the post-cast ring beam, causing water leakage at the joint between the segments and the post-cast ring beam.

[0006] Third, the dismantling of the tunnel lining segments inside the end wall is difficult due to the limited working space, making it impossible to use large machinery and requiring manual operation with low efficiency.

[0007] Fourth, the post-cast ring beam will be constructed after the main structure of the section is completed. Although its size is relatively small, approximately 12m... 3 Concrete is used, but the construction teams involved in the process include several specialized teams such as waterproofing, rebar, formwork, concrete, and grouting. The unit responsible for the shield tunnel section construction needs to assemble another specialized team after the shield tunnel section construction is completed, making construction organization difficult and labor costs high.

[0008] Fifth, the post-cast ring beam requires the removal of some precast concrete segments before casting, resulting in wasted project costs. Utility Model Content

[0009] The purpose of this invention is to overcome the above-mentioned defects in the existing technology and propose a connection structure between a subway shield tunnel and the station. This structure can effectively prevent water leakage at the connection between the tunnel and the station. Furthermore, this connection structure simplifies the construction of the connection between the tunnel and the station, reduces construction costs, and improves construction efficiency.

[0010] The technical solution of this utility model is: a connection structure between a subway shield tunnel and a station, comprising:

[0011] The annular steel plate is fixedly installed on the inner annular surface and the annular side end face of the station end wall.

[0012] The connecting segment is located on the inner side of the station end wall, fixedly connected to the shield tunnel segment, and fixedly connected to the station end wall by bolts.

[0013] In this utility model, the annular steel plate includes an inner annular steel plate arranged along the annular inner hole of the station end wall and an annular side steel plate arranged along the annular end face of the station end wall. The inner annular steel plate and the annular side steel plate are an integral structure.

[0014] Anchor bars are installed inside the station end wall, and the annular steel plate is fixedly connected to the anchor bars by welding, thereby realizing the fixed connection between the station end wall and the annular steel plate.

[0015] The connecting segments are in the shape of a ring and are made up of several arc-shaped segments fixedly spliced ​​together.

[0016] When the distance between the end face of the connecting segment away from the shield tunnel segment and the end face of the station end wall away from the station retaining pile is less than 1 / 2 of the width of the station end wall, the connecting segment is fixedly connected to the station end wall by several L-shaped bolts, and the L-shaped bolts are spaced apart around the circumference of the connecting segment.

[0017] The connecting segment has a first reserved sleeve arranged in the horizontal direction on the end face of the side opposite to the shield segment, and the first reserved sleeve has an internal thread;

[0018] The L-shaped screw is provided with an external thread at its end inside the first reserved sleeve, and the external thread is threadedly engaged with the internal thread of the first reserved sleeve. The other end of the L-shaped screw is fixedly connected to the annular steel plate by welding.

[0019] The L-shaped screw has several horizontally arranged steel frames on its annular inner side, and the steel frames are fixedly connected by connecting steel bars.

[0020] A concrete pouring layer is provided between the end face of the connecting segment away from the shield tunnel segment and the annular inner surface of the station end wall. The steel frame and L-shaped bolts are all set in the concrete pouring layer.

[0021] A waterproof mortar layer is provided at the fixed connection between the L-shaped screw and the annular steel plate.

[0022] When the side end face of the connecting segment away from the shield tunnel segment is located outside the side end face of the station end wall away from the station retaining pile, the connecting segment and the station end wall are fixedly connected by several second screws and several oblique connecting screws.

[0023] The connecting segment is provided with several second reserved sleeves, which are spaced apart around the circumference of the connecting segment, and corresponding second screw holes are provided in the station end wall.

[0024] The second screw passes through the second reserved sleeve and the corresponding second screw in sequence. The second reserved sleeve is provided with an internal thread, and the corresponding second screw is provided with an external thread. The fixed connection between the second screw and the connecting tube segment is achieved through the engagement between the internal thread and the external thread.

[0025] The connecting tube segment is provided with several second screw holes, which are spaced apart along the circumference of the connecting tube segment;

[0026] One end of the oblique connecting screw is set in the second screw hole, and the other end of the oblique connecting screw is fixedly connected to the circumferential steel plate by welding.

[0027] The outer side of the fixed connection between the diagonal connecting screw and the circumferential steel plate is coated with waterproof mortar.

[0028] Grouting material layers are provided in the annular gap between the inner surface of the station end wall and the connecting pipe segment, as well as in the annular gap between the inner surface of the station retaining pile and the connecting pipe segment.

[0029] Water-stop strips are installed on the outer annular surface of the connecting segments and the inner annular surface of the station end wall.

[0030] The beneficial effects of this utility model are:

[0031] (1) This application eliminates the post-cast ring beam and uses bolts to connect the segments and the station end wall, which reduces the leakage problem caused by poor construction quality of the post-cast ring beam;

[0032] (2) Since the tunnel station between the two stations and the module of the shield tunnel segment are different, this application divides the setting of shield tunnel segment and connecting segment into two basic cases, and these two basic cases can basically cover all cases, so that the connection structure proposed in this application can be applied to a variety of operating conditions and has a wider applicability.

[0033] (3) Although this application also requires the removal of concrete segments, compared with the prior art, it only requires the removal of some precast concrete segments in the open area of ​​the station, which significantly reduces the difficulty of operation compared with the operation in the tunnel section.

[0034] (4) Since there is no need to pour post-cast ring beams inside the tunnel, the difficulty of construction organization is reduced and the construction cost is greatly reduced;

[0035] (5) The connection between the connecting segments and the station end wall proposed in this application is made by bolts, which can be implemented simultaneously during the shield tunneling process, saving about 15 days of construction time. Attached Figure Description

[0036] Figure 1 This is a structural schematic diagram of the post-cast ring beam at the connection between the existing tunnel and the station;

[0037] Figure 2 This is a schematic diagram of the connection structure between the annular steel plate and the station end wall;

[0038] Figure 3 yes Figure 2 Enlarged view of section A in the image;

[0039] Figure 4 This is a schematic diagram of the first anchor bar installation;

[0040] Figure 5 This is a structural diagram after the first connecting segment has been installed;

[0041] Figure 6 This is a schematic diagram of the first reserved sleeve setting;

[0042] Figure 7 This is a structural schematic diagram of the first reserved sleeve;

[0043] Figure 8 This is a schematic diagram of the structure after the first connecting segment and the station end wall are connected by an L-shaped bolt.

[0044] Figure 9 This is a structural diagram after the concrete pouring layer has been installed;

[0045] Figure 10 This is a structural diagram after the second connecting segment is installed;

[0046] Figure 11 This is a schematic diagram of the second reserved sleeve;

[0047] Figure 12 This is a schematic diagram of the structure after the second connecting segment is fixedly connected to the station end wall by the second screw.

[0048] Figure 13 This is a schematic diagram of the structure after the second connecting segment is fixedly connected to the station end wall by an oblique connecting bolt.

[0049] In the diagram: 1. Post-cast ring beam; 2. Station end wall; 3. Station retaining pile; 4. Ring steel plate; 5. First anchor bar; 6. Second anchor bar; 7. Shield tunnel segment; 8. First connecting segment; 9. First reserved sleeve; 10. Tunneling outline; 11. Synchronous grouting layer; 12. L-shaped screw; 13. Ring steel frame; 14. Connecting reinforcement; 15. Grouting material layer; 16. Concrete pouring layer; 17. Waterproof mortar layer; 18. Second connecting segment; 19. Second reserved sleeve; 20. First screw hole; 21. Second screw; 22. Water-stop strip; 23. Inclined connecting screw; 24. Second screw hole; 25. Station base plate; 26. Base plate backfill concrete layer; 27. Spiral cap. Detailed Implementation

[0050] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0051] Specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention can be implemented in many ways other than those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0052] Example 1

[0053] like Figure 9 As shown, the connection structure between the subway shield tunnel and the station described in this embodiment includes a first connecting segment 8 and an annular steel plate 4 fixed to the station end wall 2. In this embodiment, the annular steel plate 4 can be shared with the pre-embedded steel plate required for fixing the rubber curtain and steel sleeve during the shield launching or receiving stage. The station end wall 2 is provided on the side of the station retaining pile 3 facing the station direction, and the first connecting segment 8 is located on the inner annular side of the station end wall 2.

[0054] The first connecting segment 8 is annular and can be assembled from several arc-shaped segments. One end face of the first connecting segment 8 is fixedly connected to the adjacent shield segment 7 by bolts. The other end face of the first connecting segment 8 is connected to the station end wall 2, and this end face of the first connecting segment 8 extends beyond half the width of the station end wall 2. That is, the distance between the end face of the first connecting segment 8 connected to the station end wall 2 and the end face of the station end wall facing away from the station retaining piles is less than half the width of the station end wall.

[0055] like Figure 3 As shown, the annular steel plate 4 includes an inner annular steel plate disposed along the annular inner hole of the station end wall 2, and an annular side steel plate disposed along the annular end face of the station end wall 2. The inner annular steel plate and the annular side steel plate are vertically fixedly connected. In this embodiment, the inner annular steel plate and the annular side steel plate are integral structures.

[0056] The annular steel plate 4 is fixedly connected to the station end wall 2 by anchor bolts. In this embodiment, several first anchor bars 5 are provided inside the station end wall 2, such as... Figure 4 As shown, several first anchor bars 5 are arranged at circumferential intervals along the station end wall 2. The first anchor bars 5 are fixedly connected to the annular steel plate 4 by second anchor bars 6. One end of the second anchor bar 6 is fixedly connected to the first anchor bar 5 by welding, and the other end of the second anchor bar 6 is fixedly connected to the annular steel plate 4 by welding.

[0057] The first connecting segment 8 is fixedly connected to the end face of the shield tunnel segment away from the end face of the station end wall away from the station retaining pile by several L-shaped screws 12, which are spaced apart around the circumference of the first connecting segment 8.

[0058] In this embodiment, several first reserved sleeves 9 are provided on one end face of the shield tunnel segment 8. The first reserved sleeves 9 are arranged in a horizontal direction, such as... Figure 6 As shown, several first reserved sleeves 9 are evenly spaced along the circumference of the first connecting tube segment 8. One end of the L-shaped screw 12 is located inside the first reserved sleeve 9, and the other end of the L-shaped screw 12 is fixedly connected to the annular steel plate 4 by welding.

[0059] like Figure 7 As shown, the inner surface of the first pre-reserved sleeve is machined with internal threads, and the corresponding L-shaped screw is provided with external threads at one end inside the first pre-reserved sleeve. The engagement between the internal and external threads achieves a fixed connection between the first pre-reserved sleeve 9 and the L-shaped screw 12. In addition, a screw cap 27 is provided at the opening of the first pre-reserved sleeve 9, which can further fix one end of the L-shaped screw 12 inside the first pre-reserved sleeve 9.

[0060] To further enhance the fixed connection strength between the first connecting segment 8 and the station end wall 2, several annular steel frames 13 are provided on the inner side of the L-shaped screw 12. These annular steel frames 13 are arranged sequentially along the track direction at certain intervals, and are fixedly connected by connecting steel bars 14. Then, concrete is poured at the end face of the first connecting segment 8 away from the shield tunnel segment and at the inner annular surface of the station end wall 2, forming a concrete pouring layer 16. The L-shaped screw 12 and the steel frames are both located within the concrete pouring layer 16, thus improving the connection strength between the station end wall 2 and the first connecting segment 2.

[0061] In addition, a waterproof mortar layer 17 is provided on the outer surface of the fixed connection between the L-shaped screw 12 and the annular steel plate 4. The waterproof mortar layer protects the connection end between the L-shaped screw and the annular steel plate and prevents corrosion at the connection end.

[0062] In addition, the gaps between the outer annular surface of the first connecting segment 8 and the inner annular surface of the station end wall 2, as well as the gaps between the outer annular surface of the first connecting segment 8 and the inner annular surface of the station retaining pile 3, are filled with grouting material layer 15. The grouting material layer 15 has good self-sealing properties and mainly serves to prevent water leakage.

[0063] The construction procedure for the connection structure in this embodiment is as follows: First, a ring-shaped steel plate 4 is reserved at the interface between the station and the tunnel section. In this embodiment, the ring-shaped steel plate 4 is fixed to the inner ring surface and the side ring end face of the station end wall 2. As the tunnel boring machine advances, a tunneling profile 10 is formed, and pipe segments are spliced ​​on the inner side of the tunneling profile 10, including negative ring pipe segments, standard shield pipe segments 7, and first connecting pipe segments 8. During the pipe segment splicing process, there is a gap between the shield pipe segments and the tunneling profile 10. Grout is injected into this gap to form a synchronous grouting layer 11, such as... Figure 5 As shown.

[0064] Next, the threaded end of the L-shaped screw 12 is screwed into the first pre-reserved sleeve 9, and the other end of the L-shaped screw 12 is fixedly connected to the annular steel plate 4 by welding. Figure 8 As shown.

[0065] Finally, several steel frames 13, fixedly connected by connecting steel bars 14, are placed on the inner side of the L-shaped screw 12. Concrete is poured between the end of the first connecting segment 8 connected to the L-shaped screw and the inner surface of the station end wall 2 to form a concrete pouring layer 16. Mortar is then applied to the outside of the fixed connection between the L-shaped screw 12 and the annular steel plate 4 to form a waterproof mortar layer 17. Grouting material is then filled into the gaps between the outer surface of the first connecting segment 8 and the inner surface of the station end wall 2, and between the outer surface of the first connecting segment 8 and the inner surface of the station retaining pile 3 to form a grouting material layer 15. At this point, the construction of the connection structure between the subway shield tunnel and the station is completed.

[0066] Example 2

[0067] like Figure 13 As shown, the connection structure between the subway shield tunnel and the station described in this embodiment includes a second connecting segment 18 and a station end wall 2. The second connecting segment 18 is located on the inner side of the annular shape of the station end wall 2.

[0068] The second connecting segment 18 is annular and can be assembled from several arc-shaped segments. One end face of the second connecting segment 18 is fixedly connected to the adjacent shield segment 7 by bolts.

[0069] When the distance between the end face of the connecting segment connected to the station end wall and the end face of the station end wall facing away from the station retaining piles is greater than 1 / 2 of the width of the station end wall, an additional shield segment needs to be installed. In this case, the end face of the second connecting segment 18 extends beyond the end face of the station end wall 2. That is to say, the end face of the second connecting segment 18 facing away from the shield segment is located outside the end face of the station end wall facing away from the station retaining piles.

[0070] The second connecting segment 18 is connected to the station end wall 2 by several second screws 21 and several oblique connecting screws 23.

[0071] like Figure 11 As shown, several second reserved sleeves 19 are spaced apart around the circumference of the second connecting pipe segment 18. Correspondingly, a first screw hole 20 is provided on the inner side of the station end wall 2. The second screw 21 passes through the second reserved sleeve 19 on the second connecting pipe segment 18 and the first screw hole 20 on the station end wall 2 in sequence. The structure of the second reserved sleeve 19 is exactly the same as that of the first reserved sleeve in Embodiment 1, so it will not be described again here. The inner surface of the second reserved sleeve 19 is provided with threads. The second screw 21 is screwed into the second reserved sleeve 19 and the first screw hole 20 in sequence. The second screw 21 is fixed in the second reserved sleeve 19 and the corresponding first screw hole 20 by the engagement between the external thread on the second screw 21 and the internal thread on the second reserved sleeve 19.

[0072] One end of the oblique connecting screw 23 is fixedly connected to the annular steel plate 4 by welding. The other end of the oblique connecting screw 23 passes through the second screw hole 24 inside the second connecting tube segment 18. In this embodiment, several second screw holes 24 are provided at intervals along the circumference of the second connecting tube segment. The oblique connecting screw 23 further strengthens the connection between the second connecting tube segment 18 and the station end wall 2.

[0073] The gaps between the outer annular surface of the second connecting segment 18 and the inner annular surface of the station end wall 2, as well as the gaps between the outer annular surface of the second connecting segment 18 and the inner annular surface of the station retaining pile 3, are filled with grouting material layer 15. The grouting material layer 15 has good self-sealing properties and primarily serves to prevent water leakage. Slow-expansion type water-stop strips 22 are respectively installed between the inner annular surface of the station end wall 2 and the grouting material layer 15, and between the outer annular surface of the second connecting segment 18 and the grouting material layer 15, further preventing water leakage.

[0074] A waterproof mortar layer 17 is provided on the outer side of the fixed connection between the oblique connecting screw 23 and the annular steel plate 4. The waterproof mortar layer protects the connection end between the L-shaped screw and the annular steel plate, preventing rust and corrosion at the connection end.

[0075] The construction procedure for the connection structure in this embodiment is as follows: First, a ring-shaped steel plate 4 is reserved at the interface between the station and the tunnel section. In this embodiment, the ring-shaped steel plate 4 is fixed to the inner ring surface and the side ring end face of the station end wall 2. As the tunnel boring machine advances, a tunneling profile 10 is formed, and pipe segments are spliced ​​on the inner side of the tunneling profile 10, including negative ring segments, standard shield segments 7, and second connecting segments 18. During the segment splicing process, there is a gap between the shield segments and the tunneling profile 10. Grout is injected into this gap to form a synchronous grouting layer 11, such as... Figure 10 As shown.

[0076] Next, drilling is performed along the second reserved sleeve 19 to form a first screw hole 20 inside the station end wall 2. The second screw 21 is then screwed sequentially into the second reserved sleeve 19 of the second connecting segment 18 and the first screw hole 20 of the station end wall 2. Swelling-type water-stop strips 22 are respectively installed on the inner annular surface of the station end wall 2 and the outer annular surface of the second connecting segment 18. Grouting material is then filled into the gaps between the outer annular surface of the second connecting segment 18 and the inner annular surface of the station end wall 2, and between the outer annular surface of the second connecting segment 18 and the inner annular surface of the station retaining pile 3, forming a grouting layer 15. Figure 12 As shown.

[0077] Finally, after the tunnel boring machine (TBM) excavation is completed, the excessively long free end of the second connecting segment 18 is cut off. A hole is drilled inside the second connecting segment 18 to form a second screw hole 24. One end of the inclined connecting screw 23 is placed in the second screw hole 24, and the other end of the inclined connecting screw 23 is fixedly connected to the annular steel plate 4 by welding. A waterproof mortar layer 17 is applied to the outside of the fixed connection between the inclined connecting screw and the annular steel plate. Concrete is backfilled at the station floor slab 25 to form a floor slab backfill concrete layer 26, as shown below. Figure 13 As shown. With this, the construction of the connection structure between the subway shield tunnel and the station is complete.

[0078] The connection structure between the subway shield tunnel and the station provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model. The above description of the disclosed embodiments enables those skilled in the art to implement or use this utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this utility model. Therefore, this utility model is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A structure for connecting a subway shield tunnel and a station, characterized by, include: The annular steel plate is fixedly installed on the inner annular surface and the annular side end face of the station end wall; The connecting segment is located on the inner side of the station end wall, fixedly connected to the shield tunnel segment, and fixedly connected to the station end wall by bolts.

2. The connecting structure of a subway shield tunnel and a station according to claim 1, characterized in that, The annular steel plate includes an inner annular steel plate set along the annular inner hole of the station end wall, and an annular side steel plate set along the annular end face of the station end wall. The inner annular steel plate and the annular side steel plate are an integral structure. Anchor bars are installed inside the station end wall, and the annular steel plate is fixedly connected to the anchor bars by welding, thereby realizing the fixed connection between the station end wall and the annular steel plate.

3. The connection structure between the subway shield tunnel and the station according to claim 1, characterized in that, The connecting segments are in the shape of a ring and are made up of several arc-shaped segments fixedly spliced ​​together.

4. The connection structure between the subway shield tunnel and the station according to claim 1, characterized in that, When the distance between the end face of the connecting segment away from the shield tunnel segment and the end face of the station end wall away from the station retaining pile is less than 1 / 2 of the width of the station end wall, the connecting segment is fixedly connected to the station end wall by several L-shaped bolts, and the L-shaped bolts are spaced apart around the circumference of the connecting segment. The connecting segment has a first reserved sleeve arranged in the horizontal direction on the end face of the side opposite to the shield segment, and the first reserved sleeve has an internal thread; The L-shaped screw is provided with an external thread at its end inside the first reserved sleeve, and the external thread is threadedly engaged with the internal thread of the first reserved sleeve. The other end of the L-shaped screw is fixedly connected to the annular steel plate by welding.

5. The connection structure between the subway shield tunnel and the station according to claim 4, characterized in that, The L-shaped screw has several horizontally arranged steel frames on its annular inner side, and the steel frames are fixedly connected by connecting steel bars. A concrete pouring layer is provided between the end face of the connecting segment away from the shield tunnel segment and the annular inner surface of the station end wall. The steel frame and L-shaped bolts are all set in the concrete pouring layer. A waterproof mortar layer is provided at the fixed connection between the L-shaped screw and the annular steel plate.

6. The connection structure between the subway shield tunnel and the station according to claim 1, characterized in that, When the side end face of the connecting segment away from the shield tunnel segment is located outside the side end face of the station end wall away from the station retaining pile, the connecting segment and the station end wall are fixedly connected by several second screws and several oblique connecting screws.

7. The connection structure between the subway shield tunnel and the station according to claim 6, characterized in that, The connecting segment is provided with several second reserved sleeves, which are spaced apart around the circumference of the connecting segment, and corresponding second screw holes are provided in the station end wall. The second screw passes through the second reserved sleeve and the corresponding second screw in sequence. The second reserved sleeve is provided with an internal thread, and the corresponding second screw is provided with an external thread. The fixed connection between the second screw and the connecting tube segment is achieved through the engagement between the internal thread and the external thread.

8. The connection structure between the subway shield tunnel and the station according to claim 6, characterized in that, The connecting tube segment is provided with several second screw holes, which are spaced apart along the circumference of the connecting tube segment; One end of the oblique connecting screw is set in the second screw hole, and the other end of the oblique connecting screw is fixedly connected to the circumferential steel plate by welding. The outer side of the fixed connection between the diagonal connecting screw and the circumferential steel plate is coated with waterproof mortar.

9. The connection structure between the subway shield tunnel and the station according to claim 6, characterized in that, Grouting material layers are provided in the annular gap between the inner surface of the station end wall and the connecting pipe segment, as well as in the annular gap between the inner surface of the station retaining pile and the connecting pipe segment.

10. The connection structure between the subway shield tunnel and the station according to claim 6, characterized in that, Water-stop strips are installed on the outer annular surface of the connecting segments and the inner annular surface of the station end wall.

Images