A rigid loading structure for pipe jacking

Abstract

This invention belongs to the field of pipe jacking construction technology for water conveyance projects. It proposes a rigid loading structure for the pipe jacking, comprising: a concrete pipe with pre-embedded bolts; several longitudinal I-beam structures, which are fixed to the pre-embedded bolts of the pipe, and each longitudinal I-beam structure has a support end at its front end, which is connected to the tail end of the pipe jacking machine via pre-welded bolts; and several circumferential I-beam structures, which are bolted to the longitudinal I-beam structures along their axial direction, with two circumferential I-beam structures in each pipe section. This invention, through the design of a structurally sound and economical rigid loading structure for pipe jacking, can meet the requirements of preventing the jacking machine head from falling down when encountering karst caves and preventing rotation when exiting caves. This structure meets the requirements for rigidity, strength, and stability.

Description

Technical Field

[0001] This invention belongs to the field of pipe jacking construction technology for water conveyance and diversion projects, and particularly relates to a rigid loading structure acting on the pipe jacking. Background Technology

[0002] Currently, with the increasing number of water transmission and diversion projects being built in karst areas, underground excavation technology for pipeline construction, with pipe jacking machines as the core equipment for pipe jacking construction, has been widely used.

[0003] However, due to the complexity of karst geological conditions and the widespread distribution of underground caves and cavities, the use of a socket connection between the pipe jacking machine and the jacking pipe during the jacking operation results in insufficient strength for the cantilever support of the pipe jacking machine head, which usually leads to the following problems:

[0004] 1. During pipe jacking construction in karst areas, when the jacking machine encounters a karst cave, the butt joint connection between the jacking machine and the concrete jacking pipe makes it difficult to balance the weight of the falling jacking machine. This causes the jacking machine to fall and bump, making it difficult to open a skylight on the ground for hoisting and straightening.

[0005] 2. During the pipe jacking process, when the machine head exits the tunnel, the frictional resistance between the machine head and the guide rail is relatively small, making it difficult to balance the reverse torque when the cutterhead cuts into the rock and soil, causing the machine head to rotate.

[0006] Considering the challenges of pipe jacking construction in karst areas, such as the pipe jacking head falling down when encountering karst caves and the pipe jacking head rotating when exiting caves, this invention proposes a rigid connection loading structure for pipe jacking to prevent the pipe jacking head from falling down when encountering karst caves and to prevent the pipe jacking head from rotating when exiting caves. Summary of the Invention

[0007] The purpose of this invention is to provide a rigid loading structure for pipe jacking to solve the above problems. It designs a reasonable, economical and practical rigid loading structure for pipe jacking that can prevent the jacking head from falling down when encountering a karst cave and prevent rotation when exiting the cave. The structure meets the requirements of stiffness, strength and stability.

[0008] To achieve the above objectives, the present invention provides the following solution: a rigid loading structure acting on a jacking pipe, comprising:

[0009] Pipe jacking;

[0010] A longitudinal I-beam structure is fixed to the jacking pipe along the axial direction of the jacking pipe, and a support end extends from the front end of the jacking pipe. The support end is arranged circumferentially relative to the inner cavity of the jacking pipe and is connected to the jacking machine.

[0011] The circumferential I-beam structure has several members arranged along the axis of the longitudinal I-beam structure and is connected to the longitudinal I-beam structure by bolts. Two members are arranged in each jacking pipe section.

[0012] Preferably, the longitudinal I-beam structure is provided with several longitudinal I-beams, and the several longitudinal I-beam structures are connected to the inner wall of the jacking pipe by pre-embedded bolts, and the circumferential I-beam structure is connected to the longitudinal I-beam structure by bolts.

[0013] Preferably, the longitudinal I-beam structure includes longitudinal I-beams, and several longitudinal I-beams are provided. The several longitudinal I-beams are connected along the axial direction of the jacking pipe to form a longitudinal integral unit. The jacking pipe is provided with pre-embedded bolts that are fixedly connected to the longitudinal I-beams.

[0014] Preferably, the supporting end is a supporting beam structure at the front end of several longitudinal I-beams (2).

[0015] Preferably, the circumferential I-beam structure includes circumferential I-beams, which are disposed on the longitudinal I-beams and the support end. At least two circumferential I-beams are symmetrically arranged on any one of the longitudinal I-beams and the support end. The circumferential I-beams are fixed to the longitudinal I-beams by connecting bolts.

[0016] Preferably, the connector includes a number of pre-embedded bolts, which are connected to the longitudinal I-beams. The pre-embedded bolts are pre-embedded in the jacking pipe and bolted to the adjacent longitudinal I-beams.

[0017] Preferably, it further includes: a connecting bolt, the connecting bolt being disposed on the longitudinal I-beam, one end of the connecting bolt passing through the longitudinal I-beam and bolted to the circumferential I-beam.

[0018] Preferably, the specifications of the pipe jacking machine that can be cantilevered and supported increase with the increase of the rigid loading structure.

[0019] Preferably, the relationship between the specifications of the pipe jacking machine and the rigid loading structure is as follows:

[0020]

[0021] Among them, it is judged as qualified only when the length of the newly loaded structure meets the formula relationship; G 砼 For the weight of the rigidly connected loading structure part assembled inside the jacking pipe (1), L 砼 G is the length of the rigidly connected loading structure part assembled inside the jacking pipe (1). 机 For the gravity of the pipe jacking machine (6), L 机 The length of the pipe jacking machine (6) is K, which is the anti-overturning constant and has a value of 1.6.

[0022] Preferably, stiffening ribs are provided at the connection between the circumferential I-beam and the longitudinal I-beam.

[0023] Compared with the prior art, the present invention has the following advantages and technical effects:

[0024] This invention determines the required length of the rigid loading structure based on the specifications of the pipe jacking machine. The sum of the lengths of several longitudinal I-beams and the support ends equals the length of the rigid loading structure acting on the pipe jacking, effectively meeting the requirements for structural rigidity, strength, and stability. The rigid loading structure, the pipe jacking, and the tail end of the pipe jacking machine create a counterweight effect, effectively preventing the machine head from falling off. Simultaneously, the circumferentially arranged support ends are bolted to the tail end of the pipe jacking machine, stabilizing the machine and improving its anti-rotation capability. This solves the problems of the machine head falling off when encountering karst caves and rotating upon exiting caves due to unstable connections. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a diagram showing the state of the pipe jacking machine head when it enters the karst cave.

[0027] Figure 2 This is a schematic diagram of the rigid loading structure and the jacking pipe.

[0028] Figure 3 for Figure 2 Structural sectional view at point 1-1;

[0029] Figure 4 This is a schematic diagram showing the connection relationship between longitudinal and circumferential I-beams;

[0030] Among them, 1. Pipe jacking; 2. Longitudinal I-beams; 3. Circumferential I-beams; 4. Connecting bolts; 5. Embedded bolts; 6. Pipe jacking machine; 7. Stiffening ribs. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example: Refer to Figures 1-4 A rigid loading structure acting on a pipe jacking system, comprising:

[0034] Pipe 1 is a concrete jacking pipe, with pre-embedded bolts 5 installed in the jacking pipe;

[0035] The longitudinal I-beam structure is connected and fixed to the jacking pipe 1 along the axial direction of the jacking pipe 1 by pre-embedded bolts 5. The longitudinal I-beam structure has a support end extending from the front end of the jacking pipe 1. The support end is arranged circumferentially relative to the inner cavity of the jacking pipe 1 and is connected to the jacking machine 6.

[0036] The circumferential I-beam structure has several members arranged along the longitudinal I-beam structure axis and is fixedly connected to the longitudinal I-beam structure. Two members are arranged in each jacking pipe section.

[0037] This invention connects and fixes several longitudinal I-beam structures to the jacking pipe 1 using pre-embedded bolts 5. A support end extends from the front end of the jacking pipe 1, connecting to the tail end of the jacking machine 6. Several circumferential I-beam structures are arranged along the axis of the longitudinal I-beam structures to achieve rigid loading support for the jacking machine 6, improving its circumferential anti-rotation capability and achieving a reasonable distribution of support structure, effectively meeting the requirements for structural stiffness, strength, and stability. The rigid loading structure, along with the jacking pipe 1 and the tail end of the jacking machine 6, creates a counterweight effect, effectively preventing the machine head from falling off. Simultaneously, the circumferentially arranged support end stabilizes the jacking machine 6 and enhances its anti-rotation capability, thus solving the problems of the jacking machine head falling off when encountering karst caves and rotating upon exiting caves due to unstable connections.

[0038] Furthermore, several longitudinal I-beams are provided, and these longitudinal I-beams are arranged in a ring around the inner wall of the jacking pipe 1. The circumferential I-beams are connected to the longitudinal I-beams by bolts.

[0039] The longitudinal I-beam structure is fixed inside the jacking pipe 1 by pre-embedded bolts 5. The support end formed at the front end of the longitudinal I-beam structure is connected to the jacking machine 6, which effectively improves the anti-rotation stiffness and anti-overturning effect of the jacking machine 6 connected to the jacking pipe 1, enhances the connection stability, and forms an internal space inside the longitudinal I-beam structure. Based on the original internal space of the jacking pipe 1, it will not affect the maintenance, inspection and other pipe operations of the construction personnel due to occupying too much space, thus enhancing the use effect.

[0040] Furthermore, the longitudinal I-beam structure includes longitudinal I-beams 2, with several longitudinal I-beams 2 provided, and pre-embedded bolts 5 are pre-embedded in the jacking pipe 1 to connect and fix with the longitudinal I-beams 2.

[0041] By bolting several longitudinal I-beams 2 to the jacking pipe 1, a protruding support end is formed at the front end of the longitudinal I-beams 2. The support end is connected to the jacking machine 6, which effectively improves the anti-rotation and anti-overturning effect applied to the jacking machine 6, enhances the connection stability, and reduces the operating cost.

[0042] In this technical solution, the longitudinal I-beam structure preferably uses, but is not limited to, six beams. The length is calculated and selected based on the specifications of the pipe jacking machine 6 under actual conditions, thus improving the applicability of the pipe jacking machine 6. Fixing several longitudinal I-beam structures inside the pipe jacking 1 improves the original structural strength of the pipe jacking 1, and the whole structure is an addition to the original foundation of the pipe jacking 1, effectively saving usage costs and enhancing applicability.

[0043] Furthermore, the support end is a support beam structure formed at the front end of several longitudinal I-beams 2.

[0044] The required length of the rigid loading structure is calculated based on the specifications of the pipe jacking machine 6, which is the length of the overall longitudinal I-beam 2. The length of the longitudinal I-beam 2 fixed inside the pipe jacking 1 is obtained by selecting a specific number of longitudinal I-beam beams. The support beam is also an integrally formed I-beam structure located at the front end of the pipe jacking 1. Therefore, it is not necessary to add an additional support structure to achieve the anti-overturning and anti-rotation function provided by the pipe jacking machine 6.

[0045] Furthermore, the circumferential I-beam structure includes circumferential I-beams 3, which are arranged on the longitudinal I-beams 2 and the support ends. At least two circumferential I-beams 3 are symmetrically arranged on any longitudinal I-beam 2 and the support ends, and the circumferential I-beams 3 are fixedly connected to the longitudinal I-beams 2.

[0046] Furthermore, the connecting component includes pre-embedded bolts 5, and several pre-embedded bolts 5 are provided. The pre-embedded bolts 5 are fixed inside the jacking pipe and bolted to the adjacent longitudinal I-beam 2.

[0047] Furthermore, it also includes: connecting bolt 4, which is set on the longitudinal I-beam 2, and one end of the connecting bolt 4 passes through the longitudinal I-beam 2 and is bolted to the circumferential I-beam 3.

[0048] By pre-embedding bolts 5 inside the jacking pipe 1, and by having one end of the pre-embedded bolts 5 extend out of the jacking pipe 1 and be bolted to the adjacent longitudinal I-beams 2, several longitudinal I-beams 2 are fixed to the jacking pipe 1. Furthermore, connecting bolts 4 are set on the longitudinal I-beams 2 to fix the circumferential I-beams 3 to the longitudinal I-beams 2, thereby further enhancing the support strength of the rigidly loaded structure.

[0049] In this technical solution, taking advantage of the characteristics of the longitudinal I-beam structure, two pre-embedded bolts 5 are arranged opposite each other, and the two pre-embedded bolts 5 are respectively connected to the longitudinal I-beam structure bolts, thereby improving the structural connection stability.

[0050] By adding circumferential I-beams 3 within several longitudinal I-beams 2, the longitudinal I-beams 2 are further supported, thereby improving the overall rigid-loaded structure's support strength. Furthermore, by adding stiffening ribs 7 to the circumferential I-beams 3, the support strength is further enhanced. In this technical solution, both the longitudinal I-beams 2 and the circumferential I-beams 3 are I16 I-beams.

[0051] Furthermore, the size of the pipe jacking machine that can be supported increases with the increase of the rigid loading structure.

[0052] This invention calculates the required length of the rigid loading structure based on the specifications of the pipe jacking machine 6, fixes the corresponding rigid loading structure inside the pipe jacking machine 1, improves the structural connection strength of the original pipe jacking machine 1, and selects several longitudinal I-beam structures with the same length as the required rigid loading structure, fixes them inside the pipe jacking machine 1 to form a support end at the front end of the pipe jacking machine 1, and fixes the support end circumferentially to the pipe jacking machine 6 to achieve the anti-overturning and anti-rotation capabilities of the pipe jacking machine 6 structure. In addition, several circumferential I-beams 3 are fixed to the longitudinal I-beam structures and the formed support end to further improve the support strength of the overall rigid loading structure, achieve stable support for the pipe jacking machine 6, and the structural design is reasonable and convenient for actual production use.

[0053] Furthermore, when calculating the total length of the required rigid-connected loading structure based on the pipe jacking machine specification 6, the relationship between the pipe jacking machine specification 6 and the length of the rigid-connected loading structure is as follows:

[0054]

[0055] Among them, it is judged as qualified only when the length of the newly loaded structure meets the formula relationship; G 砼 For the gravity of the rigidly connected loading structure installed inside the jacking pipe 1, L 砼 G is the length of the rigidly connected loading structure section assembled inside the jacking pipe 1. 机 For the pipe jacking machine 6 gravity, L 机 6 represents the length of the pipe jacking machine, and K is the anti-overturning constant, with a value of 1.6.

[0056] Based on the known weight and length of the pipe jacking machine 6, the designed values ​​are compared and verified by pre-setting the weight and length of the rigid loading structure. When the comparison and verification results are equal, the weight and length of the rigid loading structure are the results with the lowest cost under the premise of meeting the support strength.

[0057] In this technical solution, the jacking pipe 1 is constructed by connecting 3-5 sections of concrete jacking pipe with sockets. The rigid loading structure that meets the requirements is arranged inside the concrete jacking pipe, and the longitudinal I-beam structure extends out from the front end of the jacking pipe 1 to form a support end. The area with the support end inside the jacking pipe 1 is bolted to the jacking machine 6 to complete the design of the rigid loading structure. As needed, a number of longitudinal I-beams 2 and circumferential I-beams 3 of appropriate quantity and size are selected to provide stable support for the jacking machine 6. When the jacking machine 6 is operating, the concrete jacking pipes, the rigid loading structure, and the tail end of the jacking machine 6 generate a counterweight effect to prevent the machine head from falling. At the same time, the circumferentially set support end can stabilize the jacking machine 6 and improve the anti-rotation ability of the jacking machine 6.

[0058] Furthermore, stiffening ribs 7 are provided at the connection between the circumferential I-beam 3 and the longitudinal I-beam 2.

[0059] The assembly of the rigid loading structure acting on the jacking pipe 1 includes the following steps:

[0060] Calculate the total length of the rigid connection loading structure required based on the 6-specification pipe jacking machine;

[0061] A corresponding number of longitudinal I-beams are selected and fixed inside the jacking pipe 1, and a support end is formed at the front end of the jacking pipe 1, so that the sum of the length of the support end and the length of the longitudinal I-beams is equal to the total length of the rigidly connected loading structure.

[0062] Several circumferential I-beams are set in the longitudinal I-beam structure and the support end and fixed by connecting bolts 4.

[0063] Connect the part with the support end on the jacking pipe 1 to the jacking machine 6 to complete the rigid connection loading structure assembly.

[0064] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "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 invention, and are not intended to 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 invention.

[0065] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A rigid loading structure acting on a jacking pipe, characterized in that, include: The longitudinal I-beam structure is fixed to the jacking pipe (1) along the axial direction of the jacking pipe (1), and the longitudinal I-beam structure has a support end extending from the front end of the jacking pipe (1). The support end is arranged circumferentially relative to the inner cavity of the jacking pipe (1) and connected to the jacking machine (6). A circumferential I-beam structure, wherein several I-beams are arranged along the longitudinal axis of the I-beam structure; The longitudinal I-beam structure includes longitudinal I-beams (2), and several longitudinal I-beams (2) are provided. Several longitudinal I-beams (2) are connected axially along the jacking pipe (1). The jacking pipe (1) is provided with a connector that is fixedly connected to the longitudinal I-beams (2). The circumferential I-beam structure includes a circumferential I-beam (3), which is disposed on the longitudinal I-beam (2) and the support end. At least two circumferential I-beams (3) are symmetrically arranged on any one of the longitudinal I-beams (2) and the support end. The circumferential I-beam (3) is fixedly connected to the longitudinal I-beam (2). The connector includes a pre-embedded bolt (5), and there are several pre-embedded bolts (5). The number of pre-embedded bolts (5) is the same as that of the longitudinal I-beams (2) and they correspond one-to-one. The pre-embedded bolts (5) are fixed inside the jacking pipe (1) and bolted to the adjacent longitudinal I-beams (2).

2. The rigid loading structure acting on the jacking pipe according to claim 1, characterized in that: The longitudinal I-beam structure is provided in several parts, and the longitudinal I-beam structure is arranged around the inner cavity of the jacking pipe (1). The longitudinal I-beam structure is enclosed to form a cavity, and the circumferential I-beam structure is arranged around the cavity.

3. The rigid loading structure acting on the jacking pipe according to claim 1, characterized in that: The support end is a support beam structure formed at the front end of several longitudinal I-beams (2).

4. The rigid loading structure acting on the jacking pipe according to claim 1, characterized in that, Also includes: A connecting bolt (4) is provided on the longitudinal I-beam (2), and one end of the connecting bolt (4) passes through the longitudinal I-beam (2) and is bolted to the circumferential I-beam (3).

5. The rigid loading structure acting on the jacking pipe according to claim 1, characterized in that: Stiffening ribs (7) are provided at the connection between the circumferential I-beam (3) and the longitudinal I-beam (2).

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