Stepping foundation device for inclined shaft TBM arc-shaped section

Abstract

The inclined shaft TBM arc section stepping foundation device comprises a rail, a pre-buried plate and an anchor rod, the face, away from the earth surface, of the pre-buried plate is fixedly connected with the rail, the face, close to the earth surface, of the pre-buried plate is fixedly connected with one end of the anchor rod, and the other end of the anchor rod is inserted into rock to be fixed; the included angle between the pre-buried plate and the horizontal plane is consistent with the gradient of the inclined shaft TBM arc-shaped section, and the length of the anchor rods is set according to the distance between the ground surface of the inclined shaft TBM section and the pre-buried plate. A concrete layer is formed between the track and the ground surface through concrete pouring. According to the design of the arc-shaped section stepping foundation, the guiding precision of the TBM can be improved, it is ensured that the TBM can accurately advance along the design curve radius and the bending angle, the accuracy and the construction quality of a tunnel can be ensured, the stability design of the arc-shaped section stepping foundation is beneficial for preventing the TBM from inclining, deviating or being unstable, and the construction efficiency is improved. And the stability of the whole construction process is improved.

Description

Technical Field

[0001] The present application relates to the field of foundation engineering technology, and in particular to a stepping foundation device for an arc section of a TBM in an inclined well. Background Art

[0002] In inclined shaft engineering, TBM (tunnel boring machine) is a key equipment, and its performance is directly related to the progress and quality of the entire project. In arc segment stepping construction, the stability, accuracy and operation efficiency of TBM are even more important. Therefore, the design and implementation of TBM foundation device is particularly important. The foundation device must not only be able to support the weight of TBM, but also be able to maintain its stability in curved or inclined tunnels to ensure that TBM can dig according to the predetermined trajectory.

[0003] Traditional TBM foundation devices often have difficulty meeting these requirements in arc-shaped step-by-step construction. On the one hand, due to the curvature or inclination of the tunnel, the foundation device needs to withstand greater lateral forces, which places higher demands on its structural strength and stability. On the other hand, the construction environment of the arc section is complex and changeable, requiring the foundation device to be able to adapt to various complex construction conditions. In a curved or inclined tunnel, the TBM may tilt, deflect or become unstable due to uneven distribution of geological pressure, which not only affects the construction quality and progress of the tunnel, but may also pose a threat to the safety of construction personnel and equipment. Utility Model Content

[0004] The present application provides an inclined shaft TBM arc section stepping foundation device to solve the problem that the foundation device is currently tilted, offset or unstable due to uneven distribution of geological pressure, which affects the construction quality and progress of the tunnel and poses a threat to the safety of construction personnel and equipment.

[0005] The present application provides a stepping foundation device for an inclined shaft TBM arc section, which is fixedly connected to the rock on the surface of the inclined shaft TBM arc section, and includes a track, an embedded plate and an anchor rod. The surface of the embedded plate away from the surface is fixedly connected to the track, and the surface of the embedded plate close to the surface is fixedly connected to one end of the anchor rod, and the other end of the anchor rod is inserted into the rock for fixation; there are multiple anchor rods, and the angle between the embedded plate and the horizontal plane is consistent with the slope of the inclined shaft TBM arc section. The length of the anchor rod is set according to the distance between the surface of the inclined shaft TBM section and the embedded plate; a concrete layer is formed between the track and the surface by pouring concrete.

[0006] In a feasible implementation, the embedded plate includes a plurality of steel bars, and the plurality of steel bars pass through the embedded plate close to the ground surface and bend toward a direction away from the ground surface.

[0007] In a feasible implementation, it also includes a steel mesh, which is located inside the concrete layer, one end of which is connected to the steel bars passing through the embedded plate, and the anchor rod passes through the steel mesh and is connected to the steel bars in the steel mesh.

[0008] In a feasible implementation, a round tube pin shaft for positioning which is perpendicular to the advancing direction of the TBM is provided on the track.

[0009] In a feasible implementation, the rail and the embedded plate are connected by groove welding.

[0010] In a feasible implementation, the embedded plate is square, and a plurality of the embedded plates are arranged in a linear array along the length direction of the track, and the maximum distance between adjacent embedded plates is 1000 mm.

[0011] In a feasible implementation, the minimum depth of the anchor rod inserted into the rock is 800 mm.

[0012] The inclined shaft TBM arc section stepping foundation device provided by the present application includes a track, an embedded plate and an anchor rod. The surface of the embedded plate away from the ground surface is fixedly connected to the track, the surface of the embedded plate close to the ground surface is fixedly connected to one end of the anchor rod, and the other end of the anchor rod is inserted into the rock for fixing. The embedded plate is firmly fixed to the rock on the surface of the inclined shaft TBM arc section by multiple anchor rods to form a stable foundation structure, which ensures the stability and safety of the device. The angle between the embedded plate and the horizontal plane is consistent with the slope of the inclined shaft TBM arc section, so that the device can adapt to the inclined terrain of the inclined shaft and ensure the stability of the track. The length of the anchor rod is set according to the distance between the surface of the inclined shaft TBM section and the embedded plate. The concrete layer is formed between the track and the ground surface by concrete pouring, which enhances the stability of the track and improves the integrity and bearing capacity of the entire device. The arc section stepping foundation design of the present application can improve the guiding accuracy of the TBM, ensure that the TBM can accurately move along the designed curve radius and bending angle, and help ensure the accuracy and construction quality of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0014] Figure 1 It is a front and cross-sectional view of a foundation device for assembling a TBM in a horizontal section of an inclined well provided in the present application;

[0015] Figure 2It is a top view of the foundation device track and embedded plate for inclined shaft TBM assembly provided by the present application;

[0016] Figure 3 This is a front cross-sectional view of a foundation device for assembling a TBM in an inclined section of an inclined shaft provided in the present application.

[0017] Description of reference numerals:

[0018] Among them, 1-track; 2-embedded plate; 3-concrete layer; 4-anchor rod; 5-rock; 6-round tube pin column; 7-steel mesh. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0020] Traditional TBM foundation devices often find it difficult to meet these requirements in arc-section step-by-step construction. On the one hand, due to the curvature or inclination of the tunnel, the foundation device needs to withstand greater lateral forces, which places higher demands on its structural strength and stability. On the other hand, the construction environment of the arc section is complex and changeable, requiring the foundation device to be able to adapt to various complex construction conditions. In a curved or inclined tunnel, the TBM may tilt, shift or become unstable due to uneven distribution of geological pressure, which not only affects the construction quality and progress of the tunnel, but may also pose a threat to the safety of construction personnel and equipment. The arc-section step-by-step foundation design of the present application can improve the guidance accuracy of the TBM, ensure that the TBM can accurately move along the designed curve radius and bending angle, and help ensure the accuracy and construction quality of the tunnel.

[0021] The specific structure of the inclined shaft TBM arc section stepping foundation device provided in the present application is described in detail below in conjunction with the accompanying drawings.

[0022] Reference Figure 1 , Figure 2 and Figure 3 As shown, Figure 1 This is the front cross-sectional view of the foundation device for assembling the TBM in the horizontal section of the inclined shaft. Figure 2 This is a top view of the foundation device for assembling the inclined shaft TBM. Figure 3 This is a front cross-sectional view of the foundation device used to assemble the TBM in the inclined section of the inclined shaft.

[0023] The inclined shaft TBM arc section stepping foundation device provided in the present application is fixedly connected to the rock 5 on the surface of the inclined shaft TBM arc section, including a track 1, an embedded plate 2 and an anchor rod 4, the surface of the embedded plate 2 away from the surface is fixedly connected to the track 1, the surface of the embedded plate 2 close to the surface is fixedly connected to one end of the anchor rod 4, and the other end of the anchor rod 4 is inserted into the rock 5 for fixation; the number of the anchor rods 4 is multiple, the angle between the embedded plate 2 and the horizontal plane is consistent with the slope of the inclined shaft TBM arc section, and the length of the anchor rod 4 is set according to the distance between the surface of the inclined shaft TBM section and the embedded plate 2; a concrete layer 3 is formed between the track 1 and the surface by pouring concrete.

[0024] In this basic device, a concrete layer 3 is formed between the embedded plate 2 and the ground surface by pouring concrete. The surface of the concrete layer 3 is flat and consistent with the slope of the TBM, which ensures the stability and integrity of the track 1 and improves the bearing capacity of the entire device. The thickness of the concrete layer 3 can be set according to the construction plan combined with the actual surface conditions, so that the basic device provided by this application can adapt to the changes in different terrains and inclined shaft depths, and improve the adaptability of the device. The length of the anchor rod 4 can be set according to the thickness of the concrete layer 3, which can also be understood as the distance between the surface of the inclined shaft TBM section and the embedded plate 2. This design enables the entire device to be firmly fixed on the surface of the inclined shaft, preventing displacement or damage caused by equipment vibration or uneven external force. Among them, the number of anchor rods 4 is set to multiple, which can disperse the pressure from the track 1 and the TBM equipment, and further enhance the bearing capacity of the basic device. The track 1 is set on the surface of the embedded plate 2, providing a stable path for the travel of the TBM equipment, effectively preventing the displacement, tilt or instability of the TBM equipment, and improving the construction quality and efficiency.

[0025] In some embodiments, the embedded plate 2 contains a plurality of steel bars, and the plurality of steel bars pass through the embedded plate 2 close to the surface and bend in a direction away from the surface. The steel bars enhance the structural strength of the embedded plate 2, so that the entire device has higher stability and durability when bearing various forces generated by the TBM equipment when working. The plurality of steel bars are arranged in a mesh shape in the embedded plate 2, and the steel bars perpendicular to the surface of the embedded plate 2 pass through the surface of the embedded plate 2. During installation, the surface through which the steel bars pass is facing the surface, and the passing steel bars are bent. The bent steel bars increase the contact area, and can better combine with the anchor rod 4 and the Shanghai-Nanjing layer 3 to form a tighter overall structure, thereby improving the overall bearing capacity and stability of the device, preventing the device from being displaced or loosened in the inclined shaft, and being able to better adapt to the complex environment of the inclined shaft and the working requirements of the TBM equipment.

[0026] In some embodiments, a steel mesh 7 is further included, the steel mesh 7 is located inside the concrete layer 3, one end of the steel mesh 7 is connected to the steel bars passing through the embedded plate 2, and the anchor rod 4 passes through the steel mesh 5 and is connected to the steel bars in the steel mesh 7. The steel mesh 7 is a mesh structure woven from multiple steel bars, which not only enhances the overall strength of the concrete layer 3, but also forms a closer connection with the steel bars in the embedded plate 2 and the anchor rod 4, and together constitutes a stable and powerful support system. Specifically, one end of the steel mesh 7 is closely connected to the steel bars passing through the embedded plate 2. This connection method ensures a stable connection between the steel mesh 7 and the embedded plate 2, thereby firmly binding the upper structure of the entire device together. When the TBM equipment runs on the track, the vibration and impact force generated can be effectively dispersed and absorbed through the transmission of the track, the embedded plate 2 and the steel mesh 7, greatly reducing the risk of damage to the device due to uneven force. At the same time, the anchor rod 4 also passes through the steel mesh 7 and is connected to the steel bars therein. This design allows the anchor rod 4 to not only be firmly fixed to the concrete layer 3 and the embedded plate 2, but also to form a whole with the steel mesh 7. In this way, when the anchor rod 4 is deeply embedded below the surface and tightly combined with the rock layer 5, the entire device forms a stable whole that can resist forces and vibrations from all directions.

[0027] In some embodiments, the track 1 is provided with a round tube pin 6 for positioning which is perpendicular to the forward direction of the TBM. The round tube pin 6 can ensure that the TBM equipment always maintains the correct direction and position when running on the track 1, and prevents construction errors caused by offset or deviation from the predetermined track. The round tube pin 6 does not bear force and only plays a positioning role during the installation process. The round tube pin 6 needs to be lubricated during installation to prevent it from getting stuck.

[0028] In some embodiments, the track 1 and the embedded plate 2 are connected by groove welding. Groove welding is a professional welding method, which requires that the contact surface of the track 1 and the embedded plate 2 be grooved before welding to form a certain inclination angle and shape. Such a design can increase the welding area and make the weld more uniform and full, thereby improving the welding quality. Through groove welding, the track 1 and the embedded plate 2 can be tightly combined to form a whole. This connection method can not only withstand the huge pressure and vibration from the TBM equipment, but also prevent displacement or deformation caused by external forces. In addition, groove welding also has high construction efficiency and quality controllability. During the welding process, the welding parameters and processes can be adjusted according to the actual situation to ensure that the quality and strength of the weld meet the expected requirements.

[0029] In some embodiments, the embedded plate 2 is square, and a plurality of the embedded plates 2 are arranged in a linear array along the length direction of the track 1, and the maximum distance between adjacent embedded plates 2 is 1000 mm. The embedded plate 2 is designed to be square, which is convenient for processing, manufacturing and transportation, and can ensure that it has a relatively uniform and stable performance when subjected to force. In order to adapt to the length and support requirements of the track 1, a plurality of embedded plates 2 are arranged in a linear array along the length direction of the track 1. This arrangement can ensure that the track 1 can get sufficient support at different positions, thereby meeting the operation requirements of the TBM equipment. During the arrangement of the embedded plates 2, the distance between adjacent embedded plates 2 is strictly controlled. The maximum value of this distance is set to 1000 mm. Such a setting not only takes into account the convenience of construction and installation, but also ensures that the embedded plates 2 are arranged densely enough in the support area of ​​the track 1, so as to provide continuous and stable support for the track 1.

[0030] In some embodiments, the minimum depth of the anchor rod 4 inserted into the rock 5 is 800 mm. The depth is set based on in-depth engineering mechanics analysis and field tests. The depth of 800 mm can ensure that there is sufficient contact area and bite force between the anchor rod 4 and the rock 5, thereby effectively resisting various forces and vibrations from the track 1 and the TBM equipment. In actual construction, construction personnel can appropriately adjust the insertion depth of the anchor rod 4 according to the hardness and stability of the on-site rock, as well as the weight and operation requirements of the TBM equipment, to ensure the stability and bearing capacity of the foundation device.

[0031] According to the above technical features, the inclined shaft TBM arc section stepping foundation device provided by the present application includes key components such as track 1, embedded plate 2, anchor rod 4, concrete layer 3 and steel mesh 7. Track 1 is firmly fixed on the embedded plate 2 to ensure that the TBM equipment can move accurately. The embedded plate 2 contains curved steel bars, which are tightly combined with the anchor rod 4 and the concrete layer 3 to form a strong supporting structure. The steel mesh 7 is located inside the concrete layer and is connected to the steel bars and anchor rod 4 in the embedded plate 2, further enhancing the stability and bearing capacity of the overall structure. In addition, a positioning circular tube pin 6 is provided at the track 1 to ensure the precise guidance of the TBM equipment. The track 1 is connected to the embedded plate 2 by groove welding, which improves the connection strength and stability. The device can adapt to changes in different terrains and inclined shaft depths, ensure the stable operation of the TBM equipment in the arc section construction, and improve the construction quality and efficiency.

[0032] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on the several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0033] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A stepping foundation device for an inclined shaft TBM arc section, wherein the foundation device is fixedly connected to the rock (5) on the surface of the inclined shaft TBM arc section, and is characterized in that: The invention comprises a track (1), an embedded plate (2) and an anchor rod (4); the surface of the embedded plate (2) away from the ground surface is fixedly connected to the track (1); the surface of the embedded plate (2) close to the ground surface is fixedly connected to one end of the anchor rod (4); the other end of the anchor rod (4) is inserted into the rock (5) for fixing; there are a plurality of anchor rods (4); the angle between the embedded plate (2) and the horizontal plane is consistent with the slope of the arc section of the inclined shaft TBM; the length of the anchor rod (4) is set according to the distance between the surface of the inclined shaft TBM section and the embedded plate (2); a concrete layer (3) is formed between the track (1) and the ground surface by pouring concrete.

2. The inclined shaft TBM arc section stepping foundation device according to claim 1 is characterized in that: The embedded plate (2) contains a plurality of steel bars, which pass through the embedded plate (2) on a surface close to the ground and are bent in a direction away from the ground.

3. The inclined shaft TBM arc section stepping foundation device according to claim 2 is characterized in that: It also comprises a steel mesh (7), the steel mesh (7) being located inside the concrete layer (3), one end of the steel mesh (7) being connected to the steel bars passing through the embedded plate (2), and the anchor rod (4) passing through the steel mesh (7) and being connected to the steel bars in the steel mesh (7).

4. The inclined shaft TBM arc section stepping foundation device according to claim 1 is characterized in that: The track (1) is provided with a round tube pin shaft (6) for positioning which is perpendicular to the advancing direction of the TBM.

5. The inclined shaft TBM arc section stepping foundation device according to claim 1 is characterized in that: The rail (1) and the embedded plate (2) are connected by groove welding.

6. The inclined shaft TBM arc section stepping foundation device according to claim 1 is characterized in that: The embedded plate (2) is square, and a plurality of the embedded plates (2) are arranged in a linear array along the length direction of the track (1), and the maximum distance between adjacent embedded plates (2) is 1000 mm.

7. The inclined shaft TBM arc section stepping foundation device according to claim 1 is characterized in that: The minimum depth of the anchor rod (4) inserted into the rock (5) is 800 mm.

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