Concrete segmental pipe joint and construction method thereof

Abstract

The application discloses a concrete assembled pipe joint and a construction method thereof, which comprises two prefabricated pipe segments, the two prefabricated pipe segments are connected with each other to form a pipe joint, a connecting groove is formed in the inner end of each prefabricated pipe segment, a connecting head is arranged at the other end of each prefabricated pipe segment, a fixing block is fixedly connected to the inner side of the connecting groove, a locking sliding groove is formed in the outer side of the connecting head, an opening is formed in the locking sliding groove corresponding to the position of the fixing block, an assembly block is symmetrically arranged on the longitudinal section of the prefabricated pipe segment, the assembly block is locked, a grouting groove is formed in the outer side of the prefabricated pipe segment, a grouting pipe mounting area is formed in the inner wall of the grouting groove, and a prefabricated grouting pipe is mounted in the grouting pipe mounting area.

Description

Technical Field

[0001] This invention relates to the field of pipe jacking construction technology, specifically to a concrete assembled pipe section and its construction method. Background Technology

[0002] Pipe jacking is a technique for laying pipelines using trenchless construction methods. Trenchless construction is a pipeline laying technique that involves little or no excavation. During pipe jacking construction, the jacking force generated by jacking equipment (such as jacks) is used to overcome the frictional resistance between the pipeline and the surrounding soil, pushing the pipeline into the foundation at the designed slope.

[0003] Pipe jacking offers advantages such as minimal environmental impact, small construction footprint, and low noise. It solves the problems of road and building damage caused by buried pipeline construction, demonstrating its strengths in soil stabilization and environmental protection. Therefore, pipe jacking is increasingly used in construction projects. The construction process involves first jacking one pipe section into the foundation, then lowering the second section and continuing the jacking process to form a pipe that penetrates the foundation. Typically, to enhance the connection and waterproofing between adjacent pipe sections, both ends of the pipe are equipped with a socket and a spigot, respectively.

[0004] With the acceleration of urbanization, urban underground space is being increasingly developed and utilized. Pipe jacking, due to its unique advantages in urban construction, is widely used in urban underground space engineering. To expand the usable space for underground pipelines, underground roadways, and integrated utility tunnels, the cross-sectional area of ​​pipe sections is becoming increasingly larger. The size and weight of these sections create difficulties in transportation, hoisting, and storage, especially in central urban areas where road width and construction sites are limited, significantly restricting the application and development of large-section pipe jacking. Prefabricated pipe jacking technology is an effective solution to these problems; however, current domestic prefabricated technologies involve complex assembly methods and low construction efficiency. Summary of the Invention

[0005] In order to overcome the above-mentioned technical problems, the purpose of this invention is to provide a concrete prefabricated pipe section and its construction method, which solves the problems of difficulty in transporting, hoisting and storing prefabricated pipes, complex assembly method of prefabricated pipes, cumbersome and time-consuming construction process of prefabricated pipes, and poor waterproof effect of pipe body due to inaccurate positioning of prefabricated pipes.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] The utility model provides a concrete assembled pipe joint, which comprises two prefabricated segments, the two prefabricated segments are connected to form a pipe jacking pipe joint, a connecting groove is formed in the inner end of each prefabricated segment, a connecting head is arranged on the outer end of each prefabricated segment, a fixing block is fixedly connected to the inner side of the connecting groove, a locking sliding groove is formed on the outer side of the connecting head, an opening is formed in the locking sliding groove corresponding to the position of the fixing block, an assembling block is symmetrically arranged on the longitudinal section of each prefabricated segment, the assembling block is locked, a grouting groove is formed on the outer side of each prefabricated segment, a grouting pipe mounting area is formed in the inner wall of the grouting groove, and a prefabricated grouting pipe is mounted in the grouting pipe mounting area.

[0008] As a further scheme of the utility model, the locking sliding groove is matched with the fixing block.

[0009] As a further scheme of the utility model, the assembling block comprises a splicing block one and a splicing block two, the splicing block one and the splicing block two are arranged above the longitudinal section of each prefabricated segment and matched with each other.

[0010] As a further scheme of the utility model, the length of the prefabricated grouting pipe is equal to the length of the prefabricated segment (the length of the first pipe joint is half the length of the prefabricated segment).

[0011] As a further scheme of the utility model, a plurality of grouting outlets are formed in the pipe wall of one end of the prefabricated grouting pipe.

[0012] As a further scheme of the utility model, a construction method of the concrete assembled pipe joint comprises the following steps.

[0013] S1: hoisting the prefabricated segments into a working well, assembling the prefabricated segments to form a pipe jacking pipe joint, and pre-connecting the two prefabricated segments;

[0014] S2: jacking the first pipe jacking pipe joint, placing the first pipe jacking pipe joint with the connecting groove facing the jacking direction of the pipe jacking, inserting the prefabricated grouting pipe into the grouting pipe mounting area, wherein the length of the prefabricated grouting pipe is half the length of the prefabricated segment, and then fixing the prefabricated grouting pipe and the first pipe jacking pipe joint;

[0015] S3: abutting the pipe jacking pipe joint to be installed and the previous pipe jacking pipe joint, inserting the fixing block of the connecting groove of the latter pipe jacking pipe joint into the opening of the locking sliding groove of the former pipe jacking pipe joint, and inserting the connecting head of the former pipe jacking pipe joint into the connecting groove of the latter pipe jacking pipe joint;

[0016] S4: rotating the latter pipe jacking pipe joint by 90 degrees around the axis, sliding the fixing block of the connecting groove of the latter pipe jacking pipe joint into the locking sliding groove of the former pipe jacking pipe joint, and limiting the axial movement between the two adjacent pipe jacking pipe joints;

[0017] S5: inserting the prefabricated grouting pipe into the grouting pipe installation area, making half of the length of the prefabricated grouting pipe extend in the jacking direction, extending into the grouting pipe installation area of the previous pipe section, and making the prefabricated grouting pipe connect the two adjacent pipe sections;

[0018] S6: repeating the steps of S3 to S5 until the pipe jacking construction is completed.

[0019] The beneficial effects of the present application are:

[0020] 1. The pipe jacking pipe section of the present application is assembled by using prefabricated pipe segments and prefabricated grouting pipes, which solves the problems of pipe jacking transportation, hoisting and storage difficulty and complex assembly of the assembled pipe jacking.

[0021] 2. The setting of the connecting groove and the connecting head, as well as the setting of the fixing block, the locking sliding groove and the opening, makes it easy to insert the pipe jacking pipe section when the angle is aligned, and after the newly installed pipe section is rotated by 90 degrees, the axis direction between the two adjacent pipe sections can be locked, which improves the stability and positioning accuracy of the pipe jacking structure.

[0022] 3. The nested matching setting of the connecting groove and the connecting head makes the connection between the two pipe jacking pipes not a direct joint with the inside of the pipe jacking, and the connection area between the two pipe jacking pipes has a connecting head as a buffer area, so that the water outside the pipe jacking must first pass through the connecting head area to penetrate into the inside of the pipe jacking, and the setting of the connecting groove and the locking sliding groove of the connecting head can isolate most of the water that penetrates into the joint from entering the inside of the pipe jacking, and the joint between the two adjacent pipe jacking pipe sections is pre-coated with waterproof glue that expands when it comes into contact with water, further improving the waterproof performance of the joint between the two adjacent pipe jacking pipe sections.

[0023] 4. The prefabricated grouting pipe of the present application is installed in the grouting pipe installation area of the two adjacent pipe jacking pipe sections, and the two adjacent pipe jacking pipe sections have a phase difference of 90 degrees, so that the two adjacent pipe jacking pipe sections can further fix the prefabricated pipe segments in three dimensions, further improving the stability of the two prefabricated pipe segments that are pre-connected, and after the prefabricated grouting pipe is inserted, the two prefabricated pipe segments can be further fixed in three dimensions, and in this process, the prefabricated pipe segments are fixed in three dimensions twice from the pre-connected state, greatly improving the stability of the pipe jacking installation and the performance of the pipe jacking, and by passing the thixotropic mud into the grouting groove through the grouting pipe, the thixotropic mud in the grouting groove will spread to the outer surface of the pipe jacking pipe section to lubricate it, reducing the pushing resistance of the pipe jacking, and the setting of the concrete grouting pipe eliminates the need to open through holes on the concrete prefabricated pipe jacking pipe section to install the grouting pipe line, improving the waterproof performance of the concrete prefabricated pipe jacking pipe section. BRIEF DESCRIPTION OF DRAWINGS

[0024] The present application will be further described below with reference to the accompanying drawings.

[0025] Figure 1 Structure diagram of prefabricated pipe piece in the application;

[0026] Figure 2 Structure diagram of prefabricated grouting pipe in the application;

[0027] Figure 3 Structure diagram of two prefabricated pipe pieces in the application;

[0028] Figure 4 Structure diagram of prefabricated pipe piece in the application;

[0029] Figure 5 Structure diagram of two prefabricated pipe pieces in the application;

[0030] Figure 6 Structure diagram of prefabricated grouting pipe in the application;

[0031] Figure 7 Structure diagram of prefabricated grouting pipe in the application;

[0032] Figure 8 Structure diagram of prefabricated grouting pipe in the application;

[0033] In the figure: 1, prefabricated pipe piece; 2, connecting groove; 3, connecting head; 4, assembling block; 5, grouting groove; 6, prefabricated grouting pipe; 21, fixing block; 31, locking sliding groove; 32, opening; 41, splicing block one; 42, splicing block two; 51, grouting pipe installation area; 61, grouting outlet. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0035] As shown in Figures 1-8 , a concrete assembled pipe piece comprises a prefabricated pipe piece 1, a connecting groove 2, a connecting head 3, an assembling block 4, a grouting groove 5, and a prefabricated grouting pipe 6.

[0036] As shown in Figure 1 , the prefabricated pipe piece 1 is a semi-cylindrical type, and the prefabricated pipe piece 1 is a concrete prefabricated part, which is uniformly prefabricated and formed in a factory, transported to a working well for assembly, and then subjected to pipe jacking construction.

[0037] Further as shown in Figure 1As shown, the front end of the precast tube segment 1 has a connecting groove 2 inside, and a fixing block 21 is fixedly installed inside the connecting groove 2; the rear end of the precast tube segment 1 has a connector 3, and the outer side of the connector 3 has a locking groove 31. The locking groove 31 is adapted to the shape of the fixing block 21, and the fixing block 21 can slide in the circumferential direction within the locking groove 31. An opening 32 is provided on the locking groove 31 at a position flush with the fixing block 21, and the opening 32 is used for the fixing block 21 to enter the locking groove 31.

[0038] Further as Figure 1 , Figure 3 and Figure 4 As shown, the longitudinal section of the precast segment 1 is provided with an assembly block 4, which includes: splicing block one 41 and splicing block two 42. Splicing block one 41 and splicing block two 42 are respectively positioned above the longitudinal section of the precast segment 1. Splicing block one 41 and splicing block two 42 have matching shapes. When two precast segments 1 are assembled, splicing block one 41 and splicing block two 42 of the two precast segments 1 are aligned and interlocked. Then, one of the precast segments 1 is pushed to slide splicing block one 41 and splicing block two 42 together. Figure 4 The precast segment 1, after being assembled as shown, will be locked in the vertical direction and in the horizontal direction.

[0039] Further, such as Figure 1 As shown, an annular grouting groove 5 is provided on the outer side of the precast segment 1, and two grouting pipe installation areas 51 are provided inside the pipe wall of the precast segment 1 to support the precast grouting pipe 6. Thixotropic mud is introduced into the grouting groove 5 through the precast grouting pipe 6. The thixotropic mud in the grouting groove 5 will diffuse to the outer surface of the installed jacking pipe section to lubricate it and reduce the jacking resistance.

[0040] Further, such as Figure 2 As shown, the precast grouting pipe 6 is a precast standard component of concrete, and its length is equal to the length of the precast pipe segment 1. The first precast grouting pipe 6 is half the length of the precast pipe segment 1, so that the precast grouting pipe 6 can be installed in the grouting pipe installation area 51 of two adjacent jacking pipe sections at the same time. The precast grouting pipe 6 is provided with multiple grout outlets 61 on the pipe wall in the grouting groove 5. Thixotropic mud is introduced into the precast grouting pipe 6 and input into the grouting groove 5 through the grout outlets 61. The thixotropic mud in the grouting groove 5 will diffuse to the outer surface of the installed jacking pipe section to lubricate it and reduce the pushing resistance of the jacking pipe. The setting of the precast grouting pipe 6 eliminates the need to open through holes in the precast pipe segment 1 to install the grouting pipeline, thus improving the waterproof performance of the precast concrete pipe segment 1.

[0041] Further, water-expanding waterproof glue can be applied in advance at the joint between the two adjacent pipe sections, so as to further improve the waterproof performance of the joint between the two adjacent pipe sections.

[0042] As shown in Figures 1-8 , a construction method of a concrete assembled pipe section is provided, and the specific steps are as follows.

[0043] S1: Hoist the prefabricated pipe piece 1 into the working well, and assemble two by two in the manner shown in Figure 3 to form a pipe section, and the two prefabricated pipe pieces 1 are pre-connected, and the assembly block 4 limits the movement of the two prefabricated pipe pieces 1 in the up-down direction and the left-right direction.

[0044] S2: Jack the first pipe section, place the first pipe section in the jacking direction of the pipe with the connecting groove 2, insert the prefabricated grouting pipe 6 into the grouting pipe installation area 51, wherein the first prefabricated grouting pipe 6 is half the length of the prefabricated pipe piece 1, at this time the grouting outlet 61 of the prefabricated grouting pipe 6 is just in the grouting groove 5, then fix the prefabricated grouting pipe 6 with the first pipe section, the fixing method can be bolt fixing or concrete adhesion fixing.

[0045] S3: Install the subsequent pipe, align the position of the pipe to be installed with the previous pipe section, and connect the connecting groove 2 of the subsequent pipe section to the opening 32 of the locking sliding groove 31 of the previous pipe section, and the connecting head 3 of the previous pipe section is inserted into the connecting groove 2 of the subsequent pipe section.

[0046] S4: Rotate the subsequently installed pipe section by 90 degrees around the axis (as shown in Figure 6 ), so that the fixing block 21 of the connecting groove 2 of the subsequent pipe section slides into the locking sliding groove 31 of the previous pipe section, and the locking sliding groove 31 can limit the axial movement between the two adjacent pipe sections.

[0047] S5: Insert the prefabricated grouting pipe 6 into the grouting pipe installation area 51, so that half the length of the prefabricated grouting pipe 6 extends in the jacking direction and extends into the grouting pipe installation area 51 of the previous pipe section, so that the prefabricated grouting pipe 6 connects the two adjacent pipe sections.

[0048] S6: Repeat the steps of S3 to S5 until the pipe construction is completed.

[0049] The above describes one embodiment of the present application in detail, but the content described is only the preferred embodiment of the present application and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still be included in the scope of the present patent.

Claims

1. A concrete segmental pipe joint, characterized by The utility model provides a kind of prefabricated pipe piece (1) and two prefabricated pipe pieces (1) are connected to form pipe section, and the inside of one end of prefabricated pipe piece (1) is provided with connecting groove (2), and the other end is provided with connecting head (3), and the inside of connecting groove (2) is fixedly connected with fixed block (21), and the outside of connecting head (3) is provided with locking sliding slot (31), and the position of locking sliding slot (31) is provided with opening (32) corresponding to fixed block (21), and prefabricated pipe piece (1) longitudinal section is provided with assembling block (4) symmetrically, and is locked by assembling block (4), and the outside of prefabricated pipe piece (1) is provided with grouting groove (5), and the inner wall of grouting groove (5) is provided with grouting pipe installation area (51), and grouting pipe installation area (51) is installed with prefabricated grouting pipe (6); The assembling block (4) includes a splicing block one (41) and a splicing block two (42), which are respectively arranged above the longitudinal section of the prefabricated pipe piece (1), and are mutually adapted. The prefabricated grouting pipe (6) has a plurality of grout outlets (61) formed on the wall of one end thereof; the prefabricated grouting pipe (6) is inserted into the prefabricated pipe piece (1) by one-half of the length thereof, and the grout outlets (61) extend into the grouting pipe installation area (51).

2. A concrete segmental pipe joint according to claim 1, wherein The locking sliding slot (31) is adapted to the fixed block (21).

3. A method of constructing a concrete segmental pipe section according to claim 1, characterised in that, The utility model includes the following steps: S1: hoist prefabricated pipe piece (1) into working well, and assemble to form pipe section, and two prefabricated pipe pieces (1) are pre-connected; S2: push the first pipe section into the ground, place the first pipe section with the connecting groove (2) facing the direction of pipe jacking, insert the prefabricated grouting pipe (6) into the grouting pipe installation area (51), and then fix the prefabricated grouting pipe (6) to the first pipe section; S3: butt joint the pipe section to be installed with the previous pipe section, insert the fixed block (21) of the connecting groove (2) of the latter pipe section into the opening (32) of the locking sliding slot (31) of the former pipe section, and correspondingly insert the connecting head (3) of the former pipe section into the connecting groove (2) of the latter pipe section; S4: rotate the latter pipe section by 90 degrees around the axis, slide the fixed block (21) of the connecting groove (2) of the latter pipe section into the locking sliding slot (31) of the former pipe section, and limit the axial movement between the two adjacent pipe sections; S5: insert the prefabricated grouting pipe (6) into the grouting pipe installation area (51), so that one-half of the length of the prefabricated grouting pipe (6) extends in the direction of pipe jacking and into the grouting pipe installation area (51) of the former pipe section, so that the prefabricated grouting pipe (6) connects the two adjacent pipe sections; S6: repeat steps S3 to S5 until the pipe jacking is completed.

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