Novel cover arch used as rear jacking device during jacking of jacking pipe

Abstract

The utility model relates to a novel cover arch used as a rear jacking device during jacking of a jacking pipe. The novel cover arch used as the rear jacking device during jacking of the jacking pipe comprises an arch ring and I-shaped steel inclined struts, the arch ring is supported and poured on surrounding rock through the pipe sheds and the pipe roofs, the pipe sheds and the pipe roofs are arranged at intervals, the bottom of the arch ring and the ground are supported through the reinforced concrete foundation, the cast-in-place pile foundations are arranged at the two bottoms of the outer end of the arch ring, and trapezoidal connecting grooves are evenly formed in the top of the outer end face of the arch ring. One end of the I-shaped steel inclined strut is clamped with the trapezoidal connecting groove, and the other end is provided with a fixing plate and is connected to the surrounding rock through the fixing plate. The bearing capacity of the cover arch structure can be improved, the cover arch on one side of the halving zone serves as a rear jacking device in the pipe jacking method construction process, the recoil of the jacking jack is counterbalanced, meanwhile, it is guaranteed that the structure is intact, and then construction of a pipe roof and a pipe shed on the other side is conducted.

Description

Technical Field

[0001] This application relates to the field of tunnel jacking construction technology, and in particular to a novel arch for use as a rear jacking device during pipe jacking. Background Technology

[0002] In tunnel construction using the pipe jacking method with pre-supported pipe jacking, due to site constraints, a central support zone is established. After the central support zone's retaining pit construction is completed, the pipe jacking and pre-supported pipe roof need to be jacked from the central support zone towards both tunnel entrances. When the pipe jacking, pre-supported pipe roof, and arch support are completed at one tunnel entrance, and both are jacked at the other tunnel entrance, the completed arch support at the other end is used as the rear jacking device. At this point, the arch support, like the back wall, needs to resist the recoil force of the jacking jacks during the jacking process. Traditional arch support typically consists of an arch ring, arch feet, and arch seats. The arch ring is the main structure of the arch support, bearing pressure from above or sides; the arch feet are the connection between the arch ring and the foundation or supports, responsible for transferring the force on the arch ring to the foundation or supports; and the arch seats provide stable support for the arch feet. Through reasonable arch design, the arch can effectively distribute the load to various parts, thereby reducing the pressure on a single part. Its main function is to provide initial support, ensure construction safety and structural stability. However, its stiffness and bearing capacity are limited and insufficient to withstand the recoil force of the jacking jack. Therefore, it is necessary to optimize the arch structure to ensure that it will not be damaged under the design jacking force. Utility Model Content

[0003] To address or partially address the problems existing in related technologies, this application provides a novel arched structure for use as a rear jacking device during pipe jacking. This arched structure can improve the load-bearing capacity of the arched structure and is designed to use the arched structure on one side of the split zone as a rear jacking device during pipe jacking construction. This device can counteract the recoil force of the jacking jacks while ensuring the integrity of the structure, thereby facilitating the construction of the pipe curtain and pipe roof on the other side.

[0004] This application provides a novel arch for use as a rear jacking device during pipe jacking, comprising an arch ring 3 and an I-beam diagonal brace 5; the arch ring 3 is supported and cast on the surrounding rock by a pipe roof 1 and a pipe curtain 2, the pipe roof 1 and the pipe curtain 2 are arranged at intervals, the bottom of the arch ring 3 is supported by a reinforced concrete foundation 4, the two bottom ends of the outer end of the arch ring 3 are provided with cast-in-place pile foundations 6, the top of the outer end face of the arch ring 3 is uniformly provided with trapezoidal connecting grooves, one end of the I-beam diagonal brace 5 is engaged with the trapezoidal connecting groove, and the other end is installed with a fixing plate 7 and connected to the surrounding rock through the fixing plate 7.

[0005] Optionally, in some embodiments, a trapezoidal connecting block is provided at one end of the I-beam diagonal brace 5 that connects to the arch ring 3. The I-beam diagonal brace 5 is connected to the trapezoidal connecting groove on the arch ring 3 through the trapezoidal connecting block. An upper connecting block is provided at one end of the I-beam diagonal brace 5 that connects to the fixing plate 7. The upper connecting block is tightly connected to the connecting groove opened on the fixing plate 7.

[0006] Optionally, in some embodiments, the I-beam diagonal brace 5 and the trapezoidal connecting block are hinged by a fixing bolt 8. The fixing bolt 8 is connected to the side of the I-beam diagonal brace 5 and the trapezoidal connecting block near the outer end face of the arch ring 3, and the length of the trapezoidal connecting block is less than the length of the trapezoidal connecting groove.

[0007] Optionally, in some embodiments, the interior angle between the I-beam diagonal brace 5 and the arch ring 3 is 10° to 30°.

[0008] The technical solution provided in this application may include the following beneficial effects:

[0009] With the addition of diagonal bracing, the pressure from the pipe jacking machine will be borne by both the arch ring and the I-beam diagonal bracing. The reinforced concrete arch ring will bear less stress than the arch structure without diagonal bracing. The two ends of the I-beam diagonal bracing are connected by mortise and tenon joints, which facilitates construction and increases the stability of the connection. The recoil force from the pipe jacking machine will be transferred to the surrounding rock through the arch ring and the I-beam diagonal bracing, increasing the stress area, avoiding stress concentration, and further reinforcing the surrounding rock.

[0010] This application can improve the bearing capacity of the arch structure and aims to use the arch on one side of the central section as a rear jacking device during the pipe jacking construction process to counteract the recoil force of the jacking jack while ensuring the integrity of the structure, so as to carry out the construction of the pipe curtain and pipe roof on the other side.

[0011] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0012] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0013] Figure 1 This is a schematic diagram of the structure of a novel arched device used as a rear jacking device during pipe jacking, as shown in the embodiments of this application;

[0014] Figure 2 This is a schematic diagram of the connection structure between the I-beam diagonal brace and the arch ring shown in the embodiments of this application;

[0015] Figure 3This is a schematic diagram of the connection structure between the I-beam diagonal brace and the fixed plate shown in the embodiments of this application;

[0016] Figure 4 This is a schematic diagram of the structure of the I-beam diagonal brace shown in the embodiments of this application;

[0017] Figure 5 This is a schematic diagram of the main view of a novel arched structure used as a rear jacking device during pipe jacking, as shown in an embodiment of this application.

[0018] Figure label:

[0019] 1-Pipe roof, 2-Pipe curtain, 3-Arch ring, 4-Reinforced concrete foundation, 5-I-beam diagonal brace, 6-Cast-in pile foundation, 7-Fixing plate, 8-Fixing bolt. Detailed Implementation

[0020] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0021] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0022] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] To address the aforementioned issues, this application provides a novel arched structure used as a rear jacking device during pipe jacking. This arched structure can improve its load-bearing capacity and is designed to use the arched structure on one side of the split zone as a rear jacking device during pipe jacking construction. This counteracts the recoil force of the jacking jacks while ensuring the structural integrity, thus facilitating the construction of the pipe curtain and pipe roof on the other side.

[0025] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0026] See Figure 1 , 5 The novel arch used as a rear jacking device during pipe jacking includes an arch ring 3 and an I-beam diagonal brace 5. The arch ring 3 is supported and cast on the surrounding rock by a pipe roof 1 and a pipe curtain 2. The pipe roof 1 and the pipe curtain 2 are arranged at intervals. The bottom of the arch ring 3 is supported by a reinforced concrete foundation 4. Two cast-in-place pile foundations 6 are set at the bottom of the outer end of the arch ring 3. Trapezoidal connecting grooves are evenly opened on the top of the outer end face of the arch ring 3. One end of the I-beam diagonal brace 5 is engaged with the trapezoidal connecting groove, and the other end is equipped with a fixing plate 7 and connected to the surrounding rock through the fixing plate 7.

[0027] During operation, after the I-beam diagonal brace 5 is installed, the pressure from the pipe jacking machine will be borne by both the arch ring 3 and the I-beam diagonal brace 5. The reinforced concrete arch ring 3 will bear less stress than the arch structure without the I-beam diagonal brace 5. The recoil force from the pipe jacking machine will be transferred to the surrounding rock through the arch ring 3 and the I-beam diagonal brace 5, increasing the stress area, avoiding stress concentration, and further reinforcing the surrounding rock.

[0028] In some implementations, see Figure 3-4 The I-beam diagonal brace 5 is provided with a trapezoidal connecting block at one end where it connects to the arch ring 3. The I-beam diagonal brace 5 is connected to the trapezoidal connecting groove on the arch ring 3 through the trapezoidal connecting block. The I-beam diagonal brace 5 is provided with an upper connecting block at one end where it connects to the fixing plate 7. The upper connecting block is tightly connected to the connecting groove on the fixing plate 7.

[0029] During operation, the two ends of the I-beam diagonal brace 5 are connected using a mortise and tenon structure, which facilitates construction and increases the stability of the connection.

[0030] In some implementations, see Figure 2 The I-beam diagonal brace 5 and the trapezoidal connecting block are hinged by a fixing bolt 8. The fixing bolt 8 is connected to the side of the I-beam diagonal brace 5 and the trapezoidal connecting block near the outer end face of the arch ring 3, and the length of the trapezoidal connecting block is less than the length of the trapezoidal connecting groove; the inner angle between the I-beam diagonal brace 5 and the arch ring 3 is 10° to 30°.

[0031] During operation, when connecting the I-beam diagonal brace 5 and the arch ring 3, push it into the arch ring 3 along the trapezoidal cross section. Adjust the angle using the fixing bolts 8, keeping the angle between 10° and 30° as much as possible to ensure that the I-beam diagonal brace 5 can fully transmit the recoil force from the pipe jacking machine. The length of the trapezoidal connecting block is less than the length of the trapezoidal connecting groove, allowing the trapezoidal connecting block to slide within the trapezoidal connecting groove. After the angle is adjusted, the length of the I-beam diagonal brace 5 is sufficient to fix the fixing plate 7 at its other end to the surrounding rock.

[0032] This application describes a novel arch-shaped support used as a rear jacking device during pipe jacking. First, the working shaft is treated. After the pipe curtain 2 is constructed, the cast-in-place pile foundation 6 and reinforced concrete foundation 4 under the rock strata are constructed. Then, a steel cage for the arch-shaped support is installed on top of the pipe curtain 2, and formwork is erected, reserving space for the pipe roof 1 and the trapezoidal connection groove. Concrete is then poured and cured. When connecting the I-beam diagonal brace 5 and the arch ring 3, it is pushed into the arch ring 3 along the trapezoidal cross-section. The angle is adjusted using fixing bolts 8, maintaining it between 10° and 30° to ensure the I-beam diagonal brace 5 can fully transmit the recoil force from the pipe jacking machine. The other end of the I-beam diagonal brace 5 is first fitted with a fixing plate 7 and then fixed in the surrounding rock. A connection groove is opened on the fixing plate 7. As the diagonal brace joint continues to penetrate deeper into the surrounding rock, the rectangular cross-sectional area gradually increases until it is fixedly connected to the rectangular cross-sectional groove on the fixing plate 7. After installing one I-beam diagonal brace 5, install the I-beam diagonal brace 5 in sequence at intervals of one pipe curtain 2 according to the location of the pipe curtain 2, and then complete the construction of the entire arch.

[0033] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0034] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0035] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A novel arched sleeve used as a rear jacking device during pipe jacking, characterized in that: The novel arch used as a rear jacking device during pipe jacking includes an arch ring (3) and an I-beam diagonal brace (5). The arch ring (3) is supported by pipe shed (1) and pipe curtain (2) and cast on the surrounding rock. The pipe shed (1) and pipe curtain (2) are arranged at intervals. The bottom of the arch ring (3) is supported by a reinforced concrete foundation (4) and the two bottoms of the outer end of the arch ring (3) are provided with cast-in-place pile foundations (6). The top of the outer end face of the arch ring (3) is uniformly provided with trapezoidal connecting grooves. One end of the I-beam diagonal brace (5) is engaged with the trapezoidal connecting groove, and the other end is equipped with a fixing plate (7) and connected to the surrounding rock through the fixing plate (7).

2. The novel arch sleeve used as a rear jacking device during pipe jacking according to claim 1, characterized in that: The end of the I-beam diagonal brace (5) connected to the arch ring (3) is provided with a trapezoidal connecting block. The I-beam diagonal brace (5) is connected to the trapezoidal connecting groove on the arch ring (3) through the trapezoidal connecting block. The end of the I-beam diagonal brace (5) connected to the fixing plate (7) is provided with an upper connecting block. The upper connecting block is tightly connected to the connecting groove opened on the fixing plate (7).

3. The novel arch sleeve used as a rear jacking device during pipe jacking according to claim 2, characterized in that: The I-beam diagonal brace (5) and the trapezoidal connecting block are hinged by a fixing bolt (8). The fixing bolt (8) is connected to the side of the I-beam diagonal brace (5) and the trapezoidal connecting block near the outer end face of the arch ring (3), and the length of the trapezoidal connecting block is less than the length of the trapezoidal connecting groove.

4. The novel arch sleeve used as a rear jacking device during pipe jacking according to claim 2, characterized in that: The internal angle between the I-beam diagonal brace (5) and the arch ring (3) is 10° to 30°.

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