Jacking pipe connecting structure

Abstract

The utility model discloses a pipe jacking connecting structure which comprises a plurality of pipe jacking sections located at the end of a tunnel and further comprises connecting pieces, the connecting pieces are located on the inner sides of the pipe jacking sections, an embedded structure is embedded in the side wall of each pipe jacking section, and the connecting pieces are connected with the embedded structures on the pipe jacking sections. And the plurality of pipe jacking sections are connected. The jacking pipe joint has the beneficial effects that the embedded part is embedded on the side wall of the jacking pipe joint when the jacking pipe is manufactured, so that the embedded part is connected with the jacking pipe; the connecting pieces are further arranged and connected with the embedded parts located on the jacking pipe sections, the adjacent jacking pipe sections located at the end of the tunnel are connected together, the connecting strength between the jacking pipe sections at the end of the tunnel is improved, and therefore under certain destructive power, the jacking pipe sections located at the end of the tunnel can still be connected. Gaps are prevented from being generated at the joints of the pipe jacking sections, and water inflow or collapse at the joints of the pipe jacking sections at the ends of the tunnel is avoided, so that the tunnel can maintain normal operation.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe jacking construction tunnels, and particularly relates to a pipe jacking connection structure. Background Technique

[0002] The pipe jacking method is a trenchless construction technology. Its main principle is to jack precast pipe segments into the formation through the back jacks, and then form the tunnel required for construction. Generally speaking, when using precast pipe segments for jacking, the formed tunnel is assembled by longitudinally continuous pipe segments.

[0003] At present, joints are provided between the pipe segments of the tunnel assembled by pipe segments, and grouting treatment is carried out at the joints, so that the joints between adjacent pipe segments have waterproof performance. The connection strength between the pipe segments connected by the joints is not high. Under a certain destructive force, the connection between several pipe jacks at the inlet end and the outlet end of the tunnel may be deformed and fall off, and then gaps are generated between the pipe segments, resulting in water ingress into the tunnel, and in severe cases, the tunnel may collapse. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is that gaps may be generated at the joints of the pipe jack segments at the tunnel end, resulting in problems such as tunnel leakage and collapse. The purpose is to provide a pipe jacking connection structure, which connects several pipe jack segments at the tunnel end through connecting pieces, prevents gaps from being generated at the joints of the pipe jack segments at the tunnel end, avoids water outside the pipe jack segments from entering the tunnel, and enables the tunnel to maintain normal operation.

[0005] The utility model is realized by the following technical solutions:

[0006] A pipe jacking connection structure,

[0007] including several pipe jack segments located at the tunnel end, and embedded structures are pre-embedded on the side walls of each pipe jack segment;

[0008] It also includes a connecting piece, the connecting piece is located in the inner cavities of several pipe jack segments, and the connecting piece is connected to the embedded structures on each pipe jack segment to connect several pipe jack segments.

[0009] By adopting the utility model in the above scheme, the embedded parts are pre-embedded on the side walls of the pipe jack segments when manufacturing the pipe jacks, so that the embedded parts are connected to the pipe jacks; a connecting piece is also provided, which is connected to the embedded parts on the pipe jack segments through connection, and connects the adjacent pipe jack segments at the tunnel end together, improving the connection strength between the pipe jack segments at the tunnel end, so that under a certain destructive force, the pipe jack segments at the tunnel end can still maintain the connection, prevent gaps from being generated at the joints of the pipe jack segments, avoid water ingress or collapse at the joints of the pipe jack segments at the tunnel end, and enable the tunnel to maintain normal operation.

[0010] In one embodiment, the embedded part includes a connecting pipe and anchor bars. One end of each anchor bar is connected to the outer periphery of the connecting pipe, and the other end is located within the concrete of the jacking pipe section. By burying one end of the anchor bar in the concrete, the anchor bar is integrally connected to the concrete, and the outer periphery of the connecting pipe is also connected to the anchor bar, increasing the connection strength between the connecting pipe and the concrete (i.e., the side wall of the jacking pipe section).

[0011] In one embodiment, the connecting pipe includes a first connecting pipe and a second connecting pipe connected end to end. The first connecting pipe is made of high-strength steel pipe and is located on the inner side wall of the jacking pipe section. The anchor bars are connected to the outer periphery of the first connecting pipe, and the second connecting pipe extends towards the outer side wall of the jacking pipe section. When the embedded part is connected to the connecting piece by bolts, the embedded part will be stressed. Therefore, by setting the first connecting pipe as a high-strength steel pipe and welding it to the anchor bars buried in the concrete, the strength and stiffness of the embedded part itself are increased to ensure the connection strength with the connecting piece.

[0012] In one embodiment, the anchor bars are in a multi-bent structure. One end of each anchor bar is welded to the outer periphery of the first connecting pipe in a fitting manner, and the other end bends away from the outer periphery of the second connecting pipe. By setting the anchor bars in a multi-bent structure, the degree of combination between the anchor bars and the concrete is increased, and the bonding force between the anchor bars and the concrete in the concrete structure is enhanced, thereby improving the integrity and stability of the anchor bars and the concrete structure.

[0013] In one embodiment, two anchor bars are connected to the outer periphery of each first connecting pipe, and the two anchor bars are evenly distributed circularly along the outer periphery of the first connecting pipe. By arranging multiple anchor bars to be connected to the first connecting pipe, the connection strength and stiffness between the first connecting pipe and the jacking pipe section are increased.

[0014] In one embodiment, the embedded part further includes a water stop plate. The water stop plate is in the shape of an annular plate and is located within the side wall of the jacking pipe section. The inner side of the water stop plate is welded to the outer periphery of the second connecting pipe. Since there are gaps and holes between the concrete and the connecting pipe embedded in the concrete, the water outside the jacking pipe enters the inside of the jacking pipe from the connecting pipe. Therefore, a water stop plate is provided and welded to the outer periphery of the second connecting pipe to prevent water from entering the inside of the jacking pipe along the pipe wall of the second connecting pipe.

[0015] In one embodiment, a bolt sleeve is further included. The bolt sleeve is connected to the inside of the first connecting pipe, and an internal thread is formed on the inside of the bolt sleeve. The connecting bolt passes through the connecting piece and is screwed with the internal thread. By providing the bolt sleeve to be connected to the first connecting pipe, it is convenient for the connecting bolt to cooperate with the internal thread of the bolt sleeve, so that the connecting piece is connected to the embedded part.

[0016] In one embodiment, the embedded part further includes a sealing sheet, and the sealing sheet is sealingly connected to one end of the second connecting pipe away from the first connecting pipe. By providing the sealing sheet, water outside the jacking pipe section is prevented from entering the inside of the jacking pipe section from the inside of the second connecting pipe.

[0017] In one embodiment, the connecting member is made of channel steel, through holes for the connecting bolts to pass through are formed in the channel steel, and the two flange plates of the channel steel abut against the inner side wall of the jacking pipe section. In this way, after the connecting member is connected to the embedded part, the two flange plates of the channel steel abut against the inner side wall of the jacking pipe section, which is convenient for making full use of the stress performance of the channel steel to ensure the stability and overall bearing capacity after the connecting member is connected to the embedded part.

[0018] In one embodiment, there are at least two connecting members, the connecting members are evenly distributed circularly along the side wall of the jacking pipe, and the connecting members and the embedded parts located on the same straight line are connected by connecting bolts. By providing a plurality of connecting members to be connected to the embedded parts, the connection strength and stiffness between several jacking pipe sections at the end of the tunnel are increased.

[0019] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0020] 1. By embedding the embedded part on the side wall of the jacking pipe section when manufacturing the jacking pipe, the embedded part is connected to the jacking pipe; a connecting member is also provided, which is connected to the embedded part located on the jacking pipe section through connection, and the adjacent jacking pipe sections at the end of the tunnel are connected together, improving the connection strength between the jacking pipe sections at the end of the tunnel, so that under a certain destructive force, the jacking pipe sections at the end of the tunnel can still maintain the connection, preventing gaps from occurring at the joints of the jacking pipe sections, avoiding water ingress or collapse at the joints of the jacking pipe sections at the end of the tunnel, and enabling the tunnel to maintain normal operation.

[0021] 2. A water stop plate is provided and welded to the outer circumference of the second connecting pipe to prevent water from entering the inside of the jacking pipe along the pipe wall of the second connecting pipe.

[0022] 3. The two flange plates of the channel steel abut against the inner side wall of the jacking pipe section, which is convenient for making full use of the stress performance of the channel steel to ensure the stability and overall bearing capacity after the connecting member is connected to the embedded part. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, form a part of this application, and do not constitute a limitation to the embodiments of the present utility model. In the drawings:

[0024] Figure 1 is a schematic structural diagram of the present utility model;

[0025] Figure 2 For the present utility model Figure 1Cross-sectional view along A-A;

[0026] Figure 3 For the present utility model Figure 2 Enlarged view of part A in it;

[0027] Figure 4 Structural diagram of the embedded part in the present utility model.

[0028] Marks in the attached drawings and corresponding component names:

[0029] Jacking pipe section 10, first connecting pipe 11, second connecting pipe 12, sealing piece 13, water stop piece 14, bolt sleeve 15, anchor bar 16, channel steel 20, connecting bolt 21. Specific implementation manners

[0030] To make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in combination with embodiments and the attached drawings. The illustrative implementation manners and descriptions of the present utility model are only used to explain the present utility model and are not used to limit the present utility model.

[0031] Throughout the specification, the mention of "one embodiment", "embodiment", "one example" or "example" means that the specific features, structures or characteristics described in connection with that embodiment or example are included in at least one embodiment of the present utility model. Therefore, the phrases "one embodiment", "embodiment", "one example" or "example" that appear in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, the specific features, structures or characteristics can be combined in one or more embodiments or examples in any appropriate combination and / or sub-combination. In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] In the description of the present utility model, the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present utility model.

[0033] In the description of the present invention, the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present invention.

[0034] The terms "first", "second", etc. used in the present invention are only used to distinguish the corresponding components for the sake of clear description, and are not intended to limit any order or emphasize importance, etc. In addition, the term "connection" used herein, without special explanation, can be directly connected or indirectly connected via other components.

[0035] It has been found through research that the strength of the crushed stones and soil on the slopes of the steep slopes or dams at the ends of the tunnel for protecting the jacked pipes is less than that of the jacked pipes in the middle of the tunnel. Therefore, when subjected to a certain strength of destructive force, cracks will occur at the joints of the jacked pipe sections 10 at both ends of the tunnel, and water may enter the tunnel through the cracks. In severe cases, the displacement of the jacked pipe sections 10 is serious, and large gaps will occur at the joints of the adjacent jacked pipe sections 10, resulting in the collapse of the gaps and the abnormal operation of the tunnel.

[0036] For this reason, the present utility model provides a jacked pipe connection structure, as Figures 1 - 4 shown, including several jacked pipe sections 10 located at the ends of the tunnel, and an embedded structure is pre-embedded on the side wall of each said jacked pipe section 10;

[0037] It further includes a connecting piece, the connecting piece is located in the inner cavities of several said jacked pipe sections 10, and the connecting piece is connected to the embedded structure on each said jacked pipe section 10 to connect several said jacked pipe sections 10.

[0038] By pre-embedding the embedded parts on the side wall of the jacked pipe section 10 when manufacturing the jacked pipe, so that the embedded parts are connected to the jacked pipe; a connecting piece is also provided, which is connected to the embedded parts located on the jacked pipe section 10 through connection to connect the adjacent jacked pipe sections 10 at the ends of the tunnel together, improving the connection strength between the jacked pipe sections 10 at the ends of the tunnel. Under a certain destructive force, the jacked pipe sections 10 at the ends of the tunnel can still be kept connected, preventing the generation of gaps at the joints of the jacked pipe sections 10, avoiding water ingress or collapse at the joints of the jacked pipe sections 10 at the ends of the tunnel, so that the tunnel can maintain normal operation.

[0039] See Figure 3 and Figure 4, the embedded part includes a connecting pipe and anchor bars 16. One end of the anchor bar 16 is connected to the outer periphery of the connecting pipe, and the other end is located in the concrete of the jacking pipe section 10. By burying one end of the anchor bar 16 in the concrete, the anchor bar 16 is integrated with the concrete. The outer periphery of the connecting pipe is also connected to the anchor bar 16, increasing the connection strength between the connecting pipe and the concrete (i.e., the side wall of the jacking pipe section 10).

[0040] See Figure 3 and Figure 4 , the connecting pipe includes a first connecting pipe 11 and a second connecting pipe 12 connected end to end. The first connecting pipe 11 is made of high-strength steel pipe, and the tensile strength of the high-strength steel pipe is greater than 500 mpa. The first connecting pipe 11 is located on the inner side wall of the jacking pipe section 10. The anchor bar 16 is connected to the outer periphery of the first connecting pipe 11, and the second connecting pipe 12 extends towards the outer side wall of the jacking pipe section 10. When the embedded part is connected to the connecting part by bolts, the embedded part will be stressed. Therefore, by setting the first connecting pipe 11 as a high-strength steel pipe and welding it to the anchor bar 16 buried in the concrete, the strength and stiffness of the embedded part itself are increased to ensure the connection strength with the connecting part.

[0041] See Figure 3 and Figure 4 , the anchor bar 16 has a multi-bent structure. One end of the anchor bar 16 is welded to the outer periphery of the first connecting pipe 11 in a fitting manner, and the other end bends away from the outer periphery of the second connecting pipe 12. By setting the anchor bar 16 as a multi-bent structure, the degree of combination between the anchor bar 16 and the concrete is increased, and the bonding force between the anchor bar 16 and the concrete in the concrete structure is enhanced, thereby improving the integrity and stability of the anchor bar 16 and the concrete structure.

[0042] See Figure 3 and Figure 4 , two anchor bars 16 are connected to the outer periphery of each first connecting pipe 11, and the two anchor bars 16 are evenly distributed in a circular shape along the outer periphery of the first connecting pipe 11. By setting multiple anchor bars 16 to be connected to the first connecting pipe 11, the connection strength and stiffness between the first connecting pipe 11 and the jacking pipe section 10 are increased.

[0043] See Figure 3 and Figure 4 , the embedded part further includes a water stop plate. The water stop plate is in the shape of an annular plate, and the water stop plate is located inside the side wall of the jacking pipe section 10. The inner side of the water stop plate is welded to the outer periphery of the second connecting pipe 12. Since there are gaps and holes between the concrete and the connecting pipe embedded in the concrete, water on the outside of the jacking pipe enters the inside of the jacking pipe from the connecting pipe. Therefore, a water stop plate is provided and welded to the outer periphery of the second connecting pipe 12 to prevent water from entering the inside of the jacking pipe along the pipe wall of the second connecting pipe 12.

[0044] See Figure 3 and Figure 4 , one end of the second connecting pipe 12 away from the first connecting pipe 11 is arranged inside the side wall of the jacking pipe section 10, thereby preventing the water outside the jacking pipe section 10 from entering the inside of the jacking pipe section 10 along the connecting pipe.

[0045] See Figure 1 and Figure 3 , further comprising a bolt sleeve 15, the bolt sleeve 15 is connected to the inside of the first connecting pipe 11, an internal thread is formed inside the bolt sleeve 15, and the connecting bolt 21 passes through the connecting member and is screwed with the internal thread. By arranging the bolt sleeve 15 to be connected with the first connecting pipe 11, it is convenient for the connecting bolt 21 to cooperate with the internal thread of the bolt sleeve 15, so that the connecting member is connected to the embedded part.

[0046] See Figure 3 and Figure 4 , the embedded part further comprises a sealing piece 13, and the sealing piece 13 is hermetically connected to one end of the second connecting pipe 12 away from the first connecting pipe 11. By arranging the sealing piece 13, the water outside the jacking pipe section 10 is prevented from entering the inside of the jacking pipe section 10 from the inside of the second connecting pipe 12.

[0047] See Figure 1 and Figure 3 , the connecting member is made of a channel steel 20, a through hole for the connecting bolt 21 to pass through is formed on the channel steel 20, and the two flange plates of the channel steel 20 are abutted against the inner side wall of the jacking pipe section 10. In this way, after the connecting member is connected to the embedded part, the two flange plates of the channel steel 20 are abutted against the inner side wall of the jacking pipe section 10, which is convenient for making full use of the stress performance of the channel steel 20 to ensure the stability and overall bearing capacity after the connecting member is connected to the embedded part.

[0048] See Figure 1 and Figure 2 , there are at least two connecting members, the connecting members are circularly and evenly distributed along the side wall of the jacking pipe, and the connecting members and the embedded parts on the same straight line are connected by connecting bolts 21. By arranging a plurality of connecting members to be connected to the embedded parts, the connection strength and stiffness between several jacking pipe sections 10 at the end of the tunnel are increased.

[0049] During specific operation, a group of embedded parts is set at the middle position in the length direction of each jacking pipe section 10. The embedded parts on one cross-section form a group, and the number of each group is 4. The 4 embedded parts are evenly distributed in a circular shape. The embedded part is composed of anchor bars 16, steel pipes, and water stop sheets 14. The length of the connecting pipe composed of the first connecting pipe 11 and the second connecting pipe 12 is the same as the thickness of the jacking pipe. The water stop sheet 14 is welded on the outer side of the second connecting pipe 12. The anchor bars 16 are 16mm threaded steel bars, which are welded on the steel pipes, and the number of anchor bars 16 on each steel pipe is 3 - 4. The embedded parts are pre-embedded during the prefabrication of the pipe sections. The connecting member adopts a 14# channel steel 20. The connecting member is arranged inside the jacking pipe section 10 and is arranged along the axial direction of the jacking pipe section 10. The number of pipe sections connected by one connecting member is 4 - 6. Openings are made on the connecting member according to the positions of the pre-embedded holes, and the hole diameters match the internal threads on the threaded sleeves. The distance between the end of the connecting member and the last pre-embedded hole is greater than 200mm to ensure the strength of the connecting member.

[0050] The above-described specific implementation manners have further elaborated on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only the specific implementation manners of the present invention and are not used to limit the protection scope of the present invention. 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 pipe jacking connection structure, comprising several pipe jacking segments located at the end of a tunnel, characterized in that, An embedded structure is pre-embedded on the side wall of each of the jacking pipe segments; It further includes a connecting piece. The connecting piece is located in the inner cavities of several of the jacking pipe segments. The connecting piece is connected to the embedded structure on each of the jacking pipe segments to connect several of the jacking pipe segments.

2. The pipe jacking connection structure according to claim 1, characterized in that, The embedded part includes a connecting pipe and anchor bars. One end of each anchor bar is connected to the outer periphery of the connecting pipe, and the other end is located in the concrete of the jacking pipe segment.

3. The pipe jacking connection structure according to claim 2, wherein, The connecting pipe includes a first connecting pipe and a second connecting pipe connected end to end. The first connecting pipe is made of high-strength steel pipe. The first connecting pipe is located on the inner side wall of the jacking pipe segment. The anchor bars are connected to the outer periphery of the first connecting pipe. The second connecting pipe extends towards the outer side wall of the jacking pipe segment.

4. The pipe jacking connection structure according to claim 3, characterized in that, The anchor bars are in a multi-bent structure. One end of each anchor bar is welded to the outer periphery of the first connecting pipe in a fitting manner, and the other end bends away from the outer periphery of the second connecting pipe.

5. The pipe jacking connection structure according to claim 3, characterized in that Two anchor bars are connected to the outer periphery of each first connecting pipe, and the two anchor bars are evenly distributed circularly along the outer periphery of the first connecting pipe.

6. The pipe jacking connection structure according to claim 3, characterized in that, The embedded part further includes a water stop plate. The water stop plate is in the shape of an annular plate. The water stop plate is located inside the side wall of the jacking pipe segment. The inner side of the water stop plate is welded to the outer periphery of the second connecting pipe.

7. The pipe jacking connection structure according to claim 3, characterized in that, It further includes a bolt sleeve. The bolt sleeve is connected to the inner side of the first connecting pipe. An internal thread is formed on the inner side of the bolt sleeve. The connecting bolt passes through the connecting piece and is screwed with the internal thread.

8. The pipe jacking connection structure according to claim 3, characterized in that, The embedded part further includes a sealing piece. The sealing piece is hermetically connected to one end of the second connecting pipe away from the first connecting pipe.

9. The pipe jacking connection structure according to any one of claims 1-8, characterized in that The connecting piece is made of channel steel. Through holes for the connecting bolts to pass through are formed on the channel steel. The two flange plates of the channel steel are abutted against the inner side wall of the jacking pipe segment.

10. The pipe jacking connection structure according to claim 9, characterized in that, There are at least two of the connecting pieces. The connecting pieces are evenly distributed circularly along the side wall of the jacking pipe. The connecting pieces and the embedded parts on the same straight line are connected by connecting bolts.

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