Rectangular jacking pipe with super-large section

Abstract

The utility model provides an ultra-large-section rectangular jacking pipe which comprises a jacking pipe body, a plurality of A-type pipe joints and a plurality of B-type pipe joints are alternately arranged in the jacking pipe body, a socket type F-type connector is longitudinally connected between each A-type pipe joint and each B-type pipe joint, and eight DN150 hoisting holes are formed in each A-type pipe joint and each B-type pipe joint. The top of each A-type pipe joint and the top of each B-type pipe joint are each provided with a DN100 top mud making hole, each A-type pipe joint comprises 18 DN25 antifriction grouting pipes and 8 DN50 grout replacement pipes, each B-type pipe joint comprises 17 DN25 mold reducing grouting pipes and 8 DN50 grout replacement pipes, and top and bottom plate grouting holes and mold reducing grouting holes are formed in each A-type pipe joint and each B-type pipe joint. In the design of construction of the urban underpass, under the condition that equal effective space exists, the rectangular section can save more than 35% of underground space, and the burial depth of the tunnel can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of urban underpass construction, in particular to a super-large cross-section rectangular jacking pipe. Background Art

[0002] With the acceleration of global urbanization, population and economic activities are concentrated in cities, and urban transportation demand has increased dramatically. However, urban land resources are limited, and transportation infrastructure construction faces huge challenges. The expansion of traditional ground transportation networks can hardly meet the growing transportation demand, and it also brings social problems such as land occupation, increased demolition costs, traffic congestion and environmental pollution. Therefore, exploring the development and utilization of underground space and building urban underpasses have become important means to alleviate traffic pressure and enhance urban functions. Adopting rectangular pipe jacking construction technology: Rectangular pipe jacking construction is a trenchless construction method that uses a pipe jacking machine to pass through the soil layer from a working pit to a receiving pit, reducing the impact on road traffic and the lives of surrounding residents. This technology can carry out construction without interrupting ground traffic, reducing the complexity of traffic organization and the impact on the surrounding environment.

[0003] While constructing the underpass, power, heat, water supply, communication and other pipelines can be integrated to form a comprehensive pipeline corridor. This design not only improves the intensive utilization rate of urban underground space, but also avoids the problem of repeated road excavation caused by pipeline construction and maintenance.

[0004] In the construction of urban underpasses, the super-large cross-section rectangular pipe jacking method is adopted, which can meet the traffic needs while reducing land occupation and demolition, and reducing the impact on surrounding traffic organization.

[0005] In the existing technology, in the process of using urban underpass construction, the current jacking tunnel design is mostly circular, but the circular jacking tunnel has the weakness of low cross-sectional space utilization; therefore, we have made improvements to this and proposed an ultra-large cross-section rectangular jacking tunnel. Utility Model Content

[0006] The purpose of the utility model is to solve the problem that most of the current designs of pipe jacking tunnels in urban underpass construction are circular, but the circular pipe jacking tunnels have the disadvantage of low cross-sectional space utilization.

[0007] In order to achieve the above-mentioned purpose of the utility model, the utility model provides the following technical solutions:

[0008] The invention discloses a rectangular jacking pipe with an extra-large cross-section, which is used to improve the above problems.

[0009] The specific application is as follows:

[0010] A super-large cross-section rectangular jacking pipe comprises a jacking pipe body, in which a plurality of A-type pipe sections and a plurality of B-type pipe sections are alternately arranged, each A-type pipe section and each B-type pipe section are longitudinally connected with a socket-and-spigot F-type joint, each A-type pipe section and each B-type pipe section are provided with eight DN150 lifting holes, and each A-type pipe section and each B-type pipe section are provided with a DN100 top mud hole at the top.

[0011] As the preferred technical solution of this application, each type A pipe section includes 18 DN25 friction-reducing grouting pipes and 8 DN50 slurry replacement pipes.

[0012] As the preferred technical solution of this application, each B-type pipe section includes 17 DN25 reduced-mold grouting pipes and 8 DN50 slurry replacement pipes.

[0013] As the preferred technical solution of the present application, each type A pipe section and each type B pipe section is provided with top and bottom plate grouting holes and mold reduction grouting holes, and the top and bottom plate grouting holes and the mold reduction grouting holes are arranged alternately.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the scheme of this application:

[0016] A jacking pipe with an extra-large end face can reduce the depth of the tunnel, saving more than 35% of underground space and greatly reducing the depth of the tunnel;

[0017] The combination of Type A and Type B pipe segments enables efficient and precise tunnel construction. By setting multiple lifting holes and mud correction holes in the jacking pipe body, as well as an optimized grouting structure, the problems of jacking resistance and construction accuracy in the construction of ultra-large cross-section tunnels are effectively solved. At the same time, the use of Type A and Type B pipe segments made of C50P10 reinforced concrete materials ensures the high strength and durability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the overall structure of a super-large cross-section rectangular jacking pipe provided in this application;

[0019] Figure 2 A schematic cross-sectional view of an A-type pipe segment of an extra-large cross-section rectangular jacking pipe provided in this application.

[0020] Indicated in the figure:

[0021] 1. Jacking pipe body; 2. A-type pipe joint; 3. B-type pipe joint; 4. F-type joint; 5. DN150 lifting hole; 6. DN100 top mud hole; 7. DN25 friction-reducing grouting pipe; 8. DN50 slurry replacement pipe; 9. Top and bottom plate grouting holes; 10. Formwork reduction grouting hole. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them.

[0023] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other unless there is a conflict.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0025] like Figure 1-2 As shown, this embodiment proposes an extra-large cross-section rectangular jacking pipe, including a jacking pipe body 1, in which a plurality of A-type pipe sections 2 and a plurality of B-type pipe sections 3 are alternately arranged, and a socket-type F-type joint 4 is longitudinally connected between each A-type pipe section 2 and each B-type pipe section 3, and each A-type pipe section 2 and each B-type pipe section 3 are provided with 8 DN150 lifting holes 5, and each A-type pipe section 2 and each B-type pipe section 3 are provided with a DN100 top mud hole 6 at the top.

[0026] The cross-sectional width of the jacking pipe body 1 is 10.4m and the height is 7.55m. The width of type A pipe section 2 or type B pipe section 3 is 1.5m and the thickness is 700mm. It is constructed using an earth pressure balance rectangular pipe jacking machine. Type A pipe section 2 and type B pipe section 3 are both C50P10 reinforced concrete structures. The weight of type A pipe section 2 and type B pipe section 3 is 82t.

[0027] A-type pipe sections 2 and B-type pipe sections 3 are arranged alternately, and socket-type F-type joints 4 are used to achieve quick connection, ensuring construction efficiency;

[0028] Type A pipe section 2 and type B pipe section 3 adopt C50P10 reinforced concrete structure to ensure high strength and durability;

[0029] The earth pressure balance rectangular pipe jacking machine is used for construction to adapt to complex geological conditions;

[0030] Each A-type / B-type pipe section has 38 DN150 lifting holes5, which facilitates lifting operations and improves construction efficiency;

[0031] Each A / B type pipe section has 31 DN100 top mud holes 6, which are used for mud correction and improve construction accuracy.

[0032] Each A-type pipe section 2 includes 18 DN25 friction-reducing grouting pipes 7 and 8 DN50 slurry displacement pipes 8.

[0033] Each B-type pipe section 3 includes 17 DN25 reduced-mold grouting pipes and 8 DN50 slurry replacement pipes 8 .

[0034] Equipped with friction-reducing grouting pipes and slurry replacement pipes, effectively reducing jacking resistance and improving construction quality;

[0035] 218 anti-friction grouting pipes for A-type pipe sections and 317 anti-friction grouting pipes for B-type pipe sections, DN25 specification, effectively reduce jacking resistance;

[0036] 28 slurry replacement pipes for A-type pipe section and 38 slurry replacement pipes for B-type pipe section, DN50 specification, realize slurry replacement and improve construction quality;

[0037] Each A-type pipe section 2 and B-type pipe section 3 is provided with top and bottom plate grouting holes 9 and mold reduction grouting holes 10, and the top and bottom plate grouting holes 9 and mold reduction grouting holes 10 are alternately arranged.

[0038] Each A-type pipe section 2 or B-type pipe section 3 is provided with a top and bottom plate grouting hole 9 or a mold reduction grouting hole 10. The top and bottom plate grouting holes 9 are used to reinforce the top and bottom plates, and the mold reduction grouting holes 10 are used to control the concrete solidification process, thereby improving the construction quality.

[0039] During jacking construction, type A is the first pipe section, and type A pipe section 2 and type B pipe section 3 are constructed alternately, and DN100 mud correction holes are set between pipe sections 1 to 5.

[0040] DN100 mud correction holes are set between pipe sections 1 to 5 to achieve precise correction and ensure tunnel construction accuracy.

[0041] In one of the installed examples:

[0042] Before pipe jacking construction, the construction site must be surveyed to understand the geological conditions and determine the location and propulsion direction of the pipe jacking machine. At the same time, according to the design drawings and construction requirements, the required A-type cylinder segments and B-type pipe segments 3, as well as other auxiliary materials and equipment, must be prepared.

[0043] Install the first A-type barrel section: transport the first A-type barrel section to the working surface of the pipe jacking machine and install it to the predetermined position through the propulsion system of the pipe jacking machine. Ensure that the horizontality and verticality of the barrel section meet the design requirements;

[0044] Connect the A-type barrel section and the B-type pipe section 3: After installing the first A-type barrel section, install the first B-type pipe section 3. Align the B-type pipe section 3 with the connection point of the A-type barrel section and connect them using the socket-type F-type joint 4. Ensure that the connection is firm and reliable, with no air leakage;

[0045] Install subsequent segments: Continue installing Type A segments and Type B segments 3 in alternating arrangements according to design requirements. During installation, ensure tight connections between segments to avoid misalignment or air leaks. Grouting reinforcement: While installing segments, perform grouting reinforcement using friction-reducing grouting pipes and slurry displacement pipes pre-installed within the segments. Grouting can reduce jacking resistance, improve construction efficiency, and also contribute to improved construction quality.

[0046] Install top and bottom plate grouting holes 9 and reduced formwork grouting holes 10: During the installation of the cylinder segments, top and bottom plate grouting holes 9 and reduced formwork grouting holes 10 must be installed on each cylinder segment according to the design requirements. These holes are used for subsequent grouting operations to control the concrete setting process and strengthen the structure.

[0047] Install mud correction holes: DN100 mud correction holes are installed between pipe sections 1 to 5 to correct deviations that occur during construction. Sand or mud is poured into the pipe through the mud correction holes to adjust the position of the pipe sections and ensure the accuracy of the tunnel.

[0048] Cement injection: After all cylinder sections are installed, cement injection is performed. First, cement slurry is injected into the mold reduction grouting holes 10 through the pipe jacking machine's grouting system to fill the mold space and allow the concrete to fully infiltrate and harden. Then, cement slurry is injected through the top and bottom plate grouting holes 9 to reinforce the top and bottom plates and improve the stability of the structure.

[0049] Construction monitoring: During the entire installation and grouting process, real-time construction monitoring should be carried out, including monitoring of pipeline advancement speed, grouting pressure, temperature and other parameters to ensure construction quality and safety.

[0050] When in use, this application adopts: an advanced earth pressure balance rectangular pipe jacking machine, combined with the innovative design of type A pipe segment 2 and type B pipe segment 3, to achieve efficient and precise tunnel construction, and by setting multiple lifting holes and mud correction holes in the jacking pipe body 1, as well as an optimized grouting system, it effectively solves the problems of jacking resistance and construction accuracy in the construction of ultra-large cross-section tunnels. At the same time, the type A and type B pipe segments 3 made of C50P10 reinforced concrete material are selected to ensure the high strength and durability of the structure, and the use of a rectangular cross-section inside can save more than 35% of underground space and can greatly reduce the burial depth of the tunnel.

[0051] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention are included in the scope of the claims of the present invention.

Claims

1. A super-large cross-section rectangular jacking pipe, comprising a jacking pipe body (1), characterized in that: A plurality of A-type pipe sections (2) and a plurality of B-type pipe sections (3) are alternately arranged in the top pipe body (1); a socket-type F-type joint (4) is longitudinally connected between each A-type pipe section (2) and each B-type pipe section (3); eight DN150 hoisting holes (5) are provided in each A-type pipe section (2) and each B-type pipe section (3); and a DN100 top mud hole (6) is provided at the top of each A-type pipe section (2) and each B-type pipe section (3).

2. The super-large cross-section rectangular jacking pipe according to claim 1, characterized in that: Each A-type pipe section (2) includes 18 DN25 friction-reducing grouting pipes (7) and 8 DN50 slurry displacement pipes (8).

3. The super-large cross-section rectangular jacking pipe according to claim 1, characterized in that: Each of the B-type pipe sections (3) comprises 17 DN25 mold reduction grouting pipes and 8 DN50 slurry replacement pipes (8).

4. The super-large cross-section rectangular jacking pipe according to claim 1, characterized in that: Each of the A-type pipe section (2) and the B-type pipe section (3) is provided with top and bottom plate grouting holes (9) and mold reduction grouting holes (10), and the top and bottom plate grouting holes (9) and the mold reduction grouting holes (10) are arranged alternately.

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