Negative ring duct piece through seam splicing device for shield construction
By designing the reference ring with a single-sided wedge-shaped first ring and the negative ring pipe piece, the problem of the pipe piece being tilted back under the thrust of the shield machine is solved, and the vertical maintenance of the palm surface of the shield machine is achieved, reducing the Energy consumption and monitoring frequency improve tunnel boring efficiency.
Patent Information
- Application Number
- CN202411636372.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2024-12-31
AI Technical Summary
During shield construction, the negative ring pipe sheet will be tilted backward under the thrust of the shield machine during the shield machine during the joint assembly process, causing the palm surface of the shield machine to deviate from the vertical direction, affecting the tunnel excavation effect, and requires frequent monitoring and adjustment. Causes energy waste.
A negative ring pipe piece through-slit assembly device including an interconnected reaction frame and a reference ring is designed. The reference ring is composed of a steel plate, a first ring and a second ring, and the first ring is a single-sided wedge structure. The wedge is greater than 0 mm and less than 140 mm, and is used to connect to the negative ring pipe piece. The wedge is used to form an axial forward tendency to offset the axial deformation caused by thrust, and keep the palm surface of the shield machine vertical.
It effectively offsets the axial deformation of the negative ring pipe sheet under thrust, keeps the palm surface of the shield machine vertical, reduces energy consumption and monitoring frequency, and improves tunnel boring efficiency.
Smart Images
Figure CN119221956A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of shield construction, and in particular relates to a negative ring segment through-seam assembling device used for shield construction. Background Art
[0002] In shield tunnel construction, multiple negative ring segments are usually used in conjunction with reaction frames as a backing measure for the shield machine to push out. Negative ring segments can be assembled in two ways: through-seam assembly and staggered assembly. The staggered assembly method has better integrity, but due to factors such as high disassembly and assembly costs and the need for construction workers to have high professional skills, the engineering efficiency is low in actual construction, and its versatility is not as good as through-seam assembly.
[0003] The through-seam assembly method aligns the longitudinal seams of two axially adjacent negative ring segments, so that the negative ring segments are axially connected into a long straight ring. In this assembly method, the thrust generated by the shield machine will cause each radial negative ring segment to deform to varying degrees. The deformation of the negative ring segments under a thrust of 1300t is measured. The difference in radial deformation between the lower waist and the top is 0.40mm, and the difference in axial deformation can be greater than 100mm, causing the ring to tend to lean back as a whole. Chinese utility model patent CN221609977U, a combined shield empty thrust reaction support structure for use in mining tunnels, discloses a common reaction frame structure, combined with Figure 1 It can be seen from the overall connection structure of the prior art that the reaction frame 100 is formed into a tripod by a long support 110 and a short support. The reference plane on the reaction frame 100 for connecting with the negative ring segment 300 is set as a vertical plane. When used in combination with the through-seam assembly process, this structure cannot offset the backward tendency of the pipe ring, causing the shield machine face supported by the pipe ring to deviate from the vertical direction, affecting the tunnel excavation effect. The shield machine needs to continuously monitor and adjust the verticality of the face during the excavation process, which will consume more energy and cause waste of resources. Summary of the invention
[0004] The purpose of the present invention is to provide a negative ring segment through-seam assembly device for shield construction, aiming to solve the technical problem in the prior art that the negative ring segments will tilt backward under the thrust of the shield machine in the through-seam assembly process, causing the shield machine face to deviate from the vertical direction.
[0005] To achieve the above-mentioned purpose, an embodiment of the present invention provides a negative ring segment through-seam assembly device for shield construction, comprising a reaction frame and a reference ring connected to each other; the reference ring comprises a steel plate and a first circular ring; the steel plate is fixedly connected to one side of the reaction frame with a bracket bolt, and the first circular ring is arranged on the side of the steel plate away from the reaction frame to be connected to the negative ring segment; the first circular ring is arranged as a single-sided wedge structure, and the wedge amount of the first circular ring is greater than 0 mm and less than 140 mm.
[0006] Preferably, the wedge amount of the first ring is 138 mm.
[0007] Preferably, the reference ring is composed of a plurality of reference sub-rings connected together; two adjacent reference sub-rings are connected by base ring bolts.
[0008] Preferably, the thickness of the first circular ring tapers from its top to its bottom.
[0009] Preferably, a second circular ring is provided on the side of the first circular ring facing away from the steel plate; the second circular ring is a single-sided wedge-shaped structure and is fitted and fixed to the first circular ring by circular bolts.
[0010] Preferably, the thickness of the second ring increases gradually from the top to the bottom.
[0011] Preferably, the side walls of the first circular ring and the second circular ring are both provided with a plurality of ribs arranged at equal distances.
[0012] Preferably, both side walls of the steel plate are penetrated with bracket screw holes; the reaction frame is provided with bracket matching holes corresponding to the bracket screw holes, and the bracket bolts pass through the bracket screw holes to be threadedly matched with the bracket matching holes.
[0013] Preferably, a plurality of bracket screw holes are provided and distributed around the steel plate.
[0014] Preferably, a steel bar is provided on the steel plate; the steel bar is threadedly connected to the top of the steel plate.
[0015] Compared with the prior art, the above one or more technical solutions in the starting negative ring segment through-seam assembly device for shield construction provided by the embodiment of the present invention have at least one of the following technical effects: the wedge-shaped amount of the first circular ring sets the side surface of the reference ring close to the negative ring segment as an inclined surface, so that the pipe ring formed by several negative ring segments forms an axial forward tilting trend from the starting position; the thrust generated by the shield machine's excavation operation acts on the negative ring segment and causes it to deform axially, and the wedge-shaped amount of the first circular ring offsets the deformation, so that the shield machine's heading face is maintained in a vertical direction to excavate a vertical excavation section, and the shield machine does not need to monitor and adjust the verticality of the heading face all the time to reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The schematic diagram of the project implementation of the prior art.
[0017] Figure 2 The present invention is implemented in a project schematic diagram.
[0018] Figure 3 It is a side view structural diagram of the connection between the reaction frame and the reference ring.
[0019] Figure 4 for Figure 3 Enlarged schematic diagram of circle A in the middle.
[0020] Figure 5 Flow chart for the installation of the reference ring.
[0021] Figure 6 This is the front view of the reference ring.
[0022] Figure 7 This is a side view of the structure of the connection between the reference ring and the second circular ring.
[0023] Figure 8 This is the front view of the steel bar structure.
[0024] In the figure: 1. reaction frame; 2. reference ring; 21. steel plate; 211. bracket screw hole; 212. bracket matching hole; 213. bracket bolt; 22. first circular ring; 23. second circular ring; 231. circular ring bolt; 232. rib plate; 24. reference sub-ring; 25. steel bar; 251. bracket matching auxiliary hole; 3. negative ring segment. DETAILED DESCRIPTION
[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.
[0026] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0028] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.
[0029] Embodiment 1
[0030] The invention is used for the negative ring segment through-seam assembly device of shield construction. Figure 2-Figure 4 , including a reaction frame 1 and a reference ring 2 connected to each other; the reaction frame 1 is used to provide support and fixation, and the reference ring 2 is used to connect with the negative ring segment 3; wherein the reference ring 2 includes a steel plate 21 and a first circular ring 22; the steel plate 21 is fixedly connected to one side of the reaction frame 1 with a bracket bolt 213, and the first circular ring 22 is arranged on the side of the steel plate 21 away from the reaction frame 1 to connect with the negative ring segment 3; the first circular ring 22 is set to a single-sided wedge structure, and the wedge amount of the first circular ring 22 is greater than 0 mm and less than 140 mm, such as 138 mm; in actual use, the wedge amount can be adjusted according to the size of the negative ring segment 3. The wedge shape of the first circular ring 22 sets an inclined surface on the side of the reference ring 2 close to the negative ring segment 3, so that the pipe ring formed by several negative ring segments 2 forms an axial forward tilting trend from the starting position; the thrust generated by the shield machine's excavation operation acts on the negative ring segment 3 and causes it to deform axially, and the wedge shape of the first circular ring 22 offsets the deformation, so that the shield machine's tunnel face is maintained in a vertical direction to excavate a vertical excavation section, and the shield machine does not need to monitor and adjust the verticality of the tunnel face all the time, so as to reduce energy consumption.
[0031] refer to Figure 5 The reference ring 2 is composed of a plurality of reference sub-rings 24; two adjacent reference sub-rings 24 are connected by base ring bolts; for example, the reference sub-rings 24 are provided with four pieces, which are respectively connected at the lower left, lower right, upper right and upper left positions to form the reference ring 2 as a whole, so as to facilitate the positioning and assembly with the reaction frame 1; the base ring bolts can be set as φ22 bolts.
[0032] refer to Figure 4 and Figure 6The two side walls of the steel plate 21 are penetrated with bracket screw holes 211, and the reaction frame 1 is provided with bracket matching holes 212 corresponding to the bracket screw holes 211. The bracket bolts 213 pass through the bracket screw holes 211 to be threaded with the bracket matching holes 212, and are connected and fixed with the matching nuts, so that the steel plate 21 and the reaction frame 1 are easy to disassemble and assemble; there are a plurality of bracket screw holes 211 and they are distributed around the steel plate 21. For example, when the steel plate 21 is set to be square, the bracket screw holes 211 are set at the four corners of the steel plate 21 to make the connection force uniform.
[0033] Embodiment 2
[0034] The difference from the first embodiment is: Figure 3 and Figure 7 ,by Figure 3 The direction indicated by the middle arrow c is the top, and the thickness of the first circular ring 22 gradually decreases from the top to the bottom. A second circular ring 23 is provided on the side of the first circular ring 22 away from the steel plate 21; the second circular ring 23 is a single-sided wedge-shaped structure and is fixedly connected to the first circular ring 22 by a circular bolt 231; the thickness of the second circular ring 23 gradually increases from the top to the bottom to weaken the wedge amount of the reference ring 2. When the wedge amount of the second circular ring 23 is consistent with that of the first circular ring 22, the reference ring 2 can be used as a conventional reference ring after the two are connected.
[0035] refer to Figure 6 and Figure 7 The side walls of the first circular ring 22 and the second circular ring 23 are provided with a plurality of ribs 232, and the plurality of ribs 232 are arranged equidistantly along the circumference of the first circular ring 22 and the second circular ring 23; the ribs 232 are made of 20 mm steel to improve the supporting strength of the first circular ring 22 and the second circular ring 23 to the negative ring segment.
[0036] Embodiment 3
[0037] The difference from the first embodiment is: Figure 8 A steel bar 25 is provided on the steel plate 21; the steel bar 25 is threadedly connected to the top of the steel plate 21; the two side walls of the steel bar 25 are penetrated with bracket matching auxiliary holes 251 corresponding to the bracket screw holes 211, and the bracket bolts 213 are connected with the bracket screw holes 211, the bracket matching auxiliary holes 251, and the bracket matching holes 212 to fix the steel bar 25, the steel plate 21, and the reaction frame 1. By changing the thickness, length, or width of the steel bar 25, the steel plate 21 can be adapted and connected to reaction frames 1 of different sizes to improve the flexibility of use.
[0038] Embodiment 4
[0039] The difference from the first embodiment is that the wedge amount of the first circular ring 22 is less than 140 mm; as a preferred embodiment, the top thickness of the first circular ring 22 is less than or equal to 200 mm, the bottom thickness is greater than or equal to 68 mm, and the wedge amount is 138 mm. When the standard ring segments (double-sided wedge, wedge amount 46 mm) are used for assembly, the first circular ring 22 can effectively offset the axial deformation of the negative ring segment 3, so that the connection surface between the negative ring segment 3 and the shield machine remains vertical, thereby making the shield machine face vertical.
[0040] Principle and installation process of the present invention:
[0041] Fix the reaction frame 1, and connect the four reference sub-rings 24 to the reaction frame 1 in the order of lower left, lower right, upper right, and upper left to form a reference ring 2 as a whole; when connecting, make the bracket screw hole 211 of the reference sub-ring 24 correspond to the bracket matching hole 212 of the reaction frame 1, use the bracket bolt 213 to pass through the bracket screw hole 211 to fit the bracket matching hole 212 and screw it, and use the nut to connect and tighten the reference sub-ring 24 to the reaction frame 1; the adjacent two reference sub-rings 24 are fixedly connected with the base ring bolts, and the connection is The connection method is simple, which improves the efficiency of disassembly and assembly; the combined reference ring 2 is provided with a first circular ring 22, and the first circular ring 22 can be connected to the negative ring segment 3 by bolts, welding, or other connection methods; the thrust generated by the shield machine excavation operation acts on the negative ring segment 3 and causes it to undergo axial deformation, and the wedge-shaped amount of the first circular ring 22 offsets the deformation amount, so that the shield machine face is maintained in a vertical direction to excavate a vertical excavation section, and the shield machine does not need to monitor and adjust the verticality of the face all the time, so as to reduce energy consumption.
[0042] The rest of this embodiment is the same as the first embodiment. The features not explained in this embodiment are all based on the explanations in the first embodiment and will not be described in detail here.
[0043] The above content is a further detailed description of the present invention in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, its architecture can be flexible and can derive a series of products. Just making a few simple deductions or substitutions should be regarded as belonging to the scope of patent protection of the present invention determined by the submitted claims.
Claims
1. A negative ring segment through-seam assembly device for shield construction, comprising a reaction frame (1) and a reference ring (2) connected to each other; characterized in that: The reference ring (2) comprises a steel plate (21) and a first circular ring (22); the steel plate (21) is fixedly connected to one side of the reaction frame (1) by a bracket bolt (213); the first circular ring (22) is arranged on a side of the steel plate (21) away from the reaction frame (1) to be connected to the negative ring segment (3); the first circular ring (22) is set as a single-sided wedge structure, and the wedge amount of the first circular ring (22) is greater than 0 mm and less than 140 mm.
2. The negative ring segment through-seam assembly device for shield construction according to claim 1 is characterized in that: The wedge volume of the first circular ring (22) is 138 mm.
3. The negative ring segment through-seam assembly device for shield construction according to claim 1 is characterized in that: The reference ring (2) is composed of a plurality of reference sub-rings (24) connected together; two adjacent reference sub-rings (24) are connected by base ring bolts.
4. The negative ring segment through-seam assembly device for shield construction according to claim 1 is characterized in that: The thickness of the first circular ring (22) gradually decreases from its top to its bottom.
5. The negative ring segment through-seam assembly device for shield construction according to claim 1 is characterized in that: A second circular ring (23) is provided on the side of the first circular ring (22) facing away from the steel plate (21); the second circular ring (23) is a single-sided wedge-shaped structure and is fitted and fixed to the first circular ring (22) by circular bolts (231).
6. The negative ring segment through-seam assembly device for shield construction according to claim 5 is characterized in that: The thickness of the second circular ring (23) increases gradually from its top to its bottom.
7. The negative ring segment through-seam assembly device for shield construction according to claim 5, characterized in that: The side walls of the first circular ring (22) and the second circular ring (23) are both provided with a plurality of ribs (232) arranged at equal distances.
8. The negative ring segment through-seam assembly device for shield construction according to claim 1 is characterized in that: The two side walls of the steel plate (21) are penetrated by bracket screw holes (211); the reaction frame (1) is provided with bracket matching holes (212) corresponding to the bracket screw holes (211); the bracket bolts (213) pass through the bracket screw holes (211) to be threadedly matched with the bracket matching holes (212).
9. The negative ring segment through-seam assembly device for shield construction according to claim 8, characterized in that: A plurality of the bracket screw holes (211) are provided and distributed around the steel plate (21).
10. The negative ring segment through-seam assembly device for shield construction according to any one of claims 1 to 9, characterized in that: A steel bar (25) is provided on the steel plate (21); the steel bar (25) is threadedly connected to the top of the steel plate (21).