Shield segment epoxy reinforcement cage and machining method thereof

Abstract

The invention discloses a shield segment epoxy reinforcement cage and a processing method thereof, and relates to the field of reinforcement combination processing method.The processing method includes the five operation steps of material preparation, reinforcement processing, reinforcement cage framework manufacturing, U-shaped buckle installation and additional rib and drag hook installation, and processing and manufacturing of the shield segment epoxy reinforcement cage are completed. According to the method, the shield segment epoxy reinforcement cage is machined and fixed by adopting a U-shaped buckle and binding wire binding mode, the connection stability of the reinforcement cage is ensured, meanwhile, damage to epoxy coating steel bars is smaller, the machining process is simpler, and the machining quality and safety in the machining process of the segment epoxy reinforcement cage are effectively improved.

Description

Technical Field

[0001] The invention relates to the field of steel bar combination processing methods, and in particular to an epoxy steel bar cage for a shield segment and a processing method thereof. Background Art

[0002] Due to its good corrosion resistance, epoxy coated steel bars are becoming increasingly important in the anti-corrosion engineering industry, and their application levels and scope are also expanding. Currently, epoxy coated steel bars have been used in the production of submarine shield tunnel segments. The use of epoxy coated steel bars increases the corrosion resistance and durability of the segments.

[0003] The processing of the segment steel cage is generally carried out by welding. Due to the insulating properties of the epoxy coating, the epoxy coating must be polished before welding the steel cage. This can easily damage the steel bar body and generate a lot of dust during the polishing process, there is a high safety risk in polishing small-diameter steel bars, the epoxy coating around the weld is easy to burn, and the quality of the epoxy coating repair at the welding position is difficult to guarantee.

[0004] Therefore, how to provide a processing method for the epoxy steel cage of the shield segment, which uses U-shaped clips and wire ties to fix the steel cage, is simple to process and causes less damage to the epoxy coated steel bars, thereby effectively improving the processing quality of the steel cage, has become a difficult problem to be urgently solved by technical personnel in this field. Summary of the invention

[0005] The purpose of the present invention is to provide a shield segment epoxy steel cage and a processing method thereof. The steel cage is fixed by adopting U-shaped clips and wire tying, which is simple to process and causes less damage to the epoxy coated steel bars, thereby effectively improving the processing quality of the steel cage.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention discloses an epoxy steel cage for a shield segment, comprising main reinforcement, stirrups, a draw hook and a U-shaped buckle, wherein the main reinforcement comprises an inner arc main reinforcement and an outer arc main reinforcement, the head and tail ends of the inner arc main reinforcement and the outer arc main reinforcement are connected in sequence to form a closed ring, a plurality of groups of inner arc main reinforcement and outer arc main reinforcement constituting the closed ring reinforcement are arranged in sequence at equal intervals, a plurality of stirrups arranged at equal intervals are sleeved on the closed ring reinforcement, and are respectively fastened to the inner arc main reinforcement and the outer arc main reinforcement through the U-shaped buckle, the two ends of the draw hook are respectively hooked together with the longitudinal reinforcement of the stirrup, and are tied and fixed to the stirrup through a wire.

[0008] Preferably, a plurality of the U-shaped buckles are arranged at staggered intervals on the inner arc surface main ribs and the outer arc surface main ribs.

[0009] Preferably, a method for processing epoxy steel cage of shield segment comprises the following steps:

[0010] Step 1: Material preparation: select epoxy coated steel bar raw materials that meet the current national standards and design requirements, and prepare the tools and equipment required for steel bar processing;

[0011] Step 2: Steel bar processing: Cut and bend the steel bars according to the design drawings and steel bar material list to ensure that the length and bending angle of the steel bars meet the design requirements;

[0012] Step 3: Make the steel cage skeleton. First, determine the installation position and quantity requirements of various steel bars according to the design drawings, and mark the installation position of the stirrups on the segment mold. Install the stirrups on the segment mold according to the marked position; secondly, install the inner arc main reinforcement and the outer arc main reinforcement on the segment mold, and spot weld the head and tail ends of each group of inner arc main reinforcement and outer arc main reinforcement in sequence to form a ring-shaped closed reinforcement;

[0013] Step 4: Install the U-shaped buckle, and fasten the inner arc main reinforcement, outer arc main reinforcement and stirrups on the steel cage frame together through the U-shaped buckle;

[0014] Step 5, install additional reinforcement and hooks. First, hook the two ends of the hook together with the longitudinal reinforcement of the stirrups, and tie them together with the stirrups by tying wire; secondly, install the additional reinforcement on the steel cage frame, and tie them together by tying wire.

[0015] Preferably, the material preparation operation steps in step one include: the epoxy coated steel bar raw materials selected according to the design requirements of the drawings shall be inspected and accepted in terms of variety, grade, specification, appearance quality and quality certification materials after entering the site, and witnessed sampling operations shall be carried out, and the samples shall be sent to a qualified testing unit for testing. The samples can only be used after passing the acceptance test.

[0016] Preferably, the steps of making the steel cage framework in step three include:

[0017] First, clean up the construction site, make sure it is flat and clean, and conduct a safety check. Determine the installation location and direction based on the size and shape of the steel cage.

[0018] Then, strictly follow the design drawings to make the steel cage skeleton on the segment formwork that meets the design requirements, place the qualified inner arc main bars, outer arc main bars, stirrups and hooks on the designated positions on the segment formwork, and assemble the steel cage skeleton after all dimensions are measured and inspected to meet the standards;

[0019] Finally, the arc length, arch height, twisting degree and main and secondary reinforcement spacing of the steel cage frame are measured. If there are any unqualified areas, they need to be repaired until they are inspected and qualified before the next step can be carried out.

[0020] Preferably, the operation steps of installing the U-shaped buckles in step 4 include: installing the U-shaped buckles on the inner arc surface main reinforcement, the outer arc surface main reinforcement and the stirrups in a staggered manner.

[0021] Preferably, the operation steps of installing additional reinforcement and hooks in step five include that after the operation steps of wire binding are completed, an inspection and acceptance operation needs to be carried out. If there are unqualified areas, they need to be repaired until they pass the inspection.

[0022] Compared with the prior art, the beneficial technical effects of the present invention are:

[0023] The present invention adopts U-shaped clips and wire tying to perform processing and fixing operations on the epoxy steel cage of the shield segment. While ensuring the connection stability of the steel cage, the damage to the epoxy coated steel bars is smaller, and the processing process is simpler, which effectively improves the processing quality of the epoxy steel cage of the segment and the safety during the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 This is a flow chart of a method for processing epoxy steel cages for shield segments of the present invention;

[0026] Figure 2 The overall structure of the epoxy steel cage of the shield segment of the present invention is shown in FIG. Figure 1 ;

[0027] Figure 3 The overall structure of the epoxy steel cage of the shield segment of the present invention is shown in FIG. Figure 2 ;

[0028] Figure 4 The overall structure of the epoxy steel cage of the shield segment of the present invention is shown in FIG. Figure 3 .

[0029] Explanation of the reference numerals in the accompanying drawings: 1. main reinforcement; 11. inner arc surface main reinforcement; 12. outer arc surface main reinforcement; 2. stirrups; 3. hook; 4. U-shaped buckle. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] like Figure 1-4As shown, a shield segment epoxy steel cage comprises a main reinforcement 1, stirrups 2, a hook 3 and a U-shaped buckle 4, wherein the main reinforcement 1 comprises an inner arc main reinforcement 11 and an outer arc main reinforcement 12, wherein the head and tail ends of the inner arc main reinforcement 11 and the outer arc main reinforcement 12 are sequentially connected to form a closed ring, and a plurality of groups of the inner arc main reinforcement 11 and the outer arc main reinforcement 12 constituting the closed ring reinforcement are arranged in sequence at equal intervals, a plurality of stirrups 2 arranged at equal intervals are sleeved on the closed ring reinforcement, and are respectively fastened to the inner arc main reinforcement 11 and the outer arc main reinforcement 12 by the U-shaped buckle 4, and the two ends of the hook 3 are respectively hooked together with the longitudinal reinforcement of the stirrup 2, and are tied and fixed to the stirrup 2 by wire.

[0032] Specifically, the plurality of U-shaped buckles 4 are arranged at intervals and in a staggered manner on the inner arc surface main rib 11 and the outer arc surface main rib 12 .

[0033] Specifically, a method for processing epoxy steel cage of shield segment comprises the following steps:

[0034] Step 1: Material preparation: select epoxy coated steel bar raw materials that meet the current national standards and design requirements, and prepare the tools and equipment required for steel bar processing;

[0035] Step 2: Steel bar processing: Cut and bend the steel bars according to the design drawings and steel bar material list to ensure that the length and bending angle of the steel bars meet the design requirements;

[0036] Step 3: Make a steel cage skeleton. First, determine the installation position and quantity requirements of various steel bars according to the design drawings, and mark the installation position of the stirrup 2 on the segment mold. Install the stirrup 2 on the segment mold according to the marked position; secondly, install the inner arc main reinforcement 11 and the outer arc main reinforcement 12 on the segment mold, and spot weld the head and tail ends of each group of inner arc main reinforcement 11 and outer arc main reinforcement 12 in sequence to form a ring-shaped closed reinforcement;

[0037] Step 4: Install the U-shaped buckle, and fasten the inner arc main reinforcement 11, the outer arc main reinforcement 12 and the stirrup 2 on the steel cage skeleton together through the U-shaped buckle 4;

[0038] Step 5, install additional reinforcement and hooks. First, hook the two ends of the hook 3 together with the longitudinal reinforcement of the stirrup 2, and tie them together with the stirrup 2 by tying wire; secondly, install the additional reinforcement on the steel cage frame, and tie them together by tying wire.

[0039] Specifically, the material preparation operation steps in step one include: the epoxy coated steel bar raw materials selected according to the design requirements of the drawings shall be inspected and accepted in terms of variety, grade, specification, appearance quality and quality certification materials after entering the site, and witnessed sampling operations shall be carried out, and the samples shall be sent to a qualified testing unit for testing. The samples can only be used after passing the acceptance test.

[0040] Specifically, the steps of making the steel cage framework in step 3 include:

[0041] First, clean up the construction site, make sure it is flat and clean, and conduct a safety check. Determine the installation location and direction based on the size and shape of the steel cage.

[0042] Then, strictly follow the design drawings to make the steel cage skeleton on the segment mold that meets the design requirements, place the qualified inner arc main reinforcement 11, outer arc main reinforcement 12, stirrups 2 and hooks 3 on the designated position on the segment mold, and assemble the steel cage skeleton after all dimensions are measured and inspected to meet the standards;

[0043] Finally, the arc length, arch height, twisting degree and main and secondary reinforcement spacing of the steel cage frame are measured. If there are any unqualified areas, they need to be repaired until they are inspected and qualified before the next step can be carried out.

[0044] Specifically, the operation steps of installing the U-shaped buckle in step 4 include: installing the inner arc surface main reinforcement 11, the outer arc surface main reinforcement 12 and the U-shaped buckle 4 on the stirrup 2 in a staggered manner.

[0045] Specifically, the operation steps of installing additional reinforcement and hooks in step five include: after completing the operation steps of wire binding, inspection and acceptance operations need to be carried out. If there are unqualified areas, they need to be repaired until they are qualified in inspection.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A shield segment epoxy reinforcement cage, characterized in that: The invention comprises a main reinforcement (1), stirrups (2), a draw hook (3) and a U-shaped buckle (4), wherein the main reinforcement (1) comprises an inner arc main reinforcement (11) and an outer arc main reinforcement (12), the head and tail ends of the inner arc main reinforcement (11) and the outer arc main reinforcement (12) are connected in sequence to form a closed ring, and a plurality of groups of the inner arc main reinforcement (11) and the outer arc main reinforcement (12) constituting the closed ring reinforcement are arranged in sequence at equal intervals, a plurality of stirrups (2) arranged at equal intervals are sleeved on the closed ring reinforcement, and are respectively fastened to the inner arc main reinforcement (11) and the outer arc main reinforcement (12) by means of the U-shaped buckle (4), and the two ends of the draw hook (3) are respectively hooked together with the longitudinal steel bars of the stirrups (2), and are tied and fixed to the stirrups (2) by means of a wire.

2. The shield segment epoxy reinforcement cage according to claim 1, characterized in that: A plurality of the U-shaped buckles (4) are arranged at intervals and in a staggered manner on the inner arc surface main rib (11) and the outer arc surface main rib (12).

3. A method for processing epoxy steel cage of shield segment, characterized in that: The following steps are involved: Step 1: Material preparation: select epoxy coated steel bar raw materials that meet the current national standards and design requirements, and prepare the tools and equipment required for steel bar processing; Step 2: Steel bar processing: Cut and bend the steel bars according to the design drawings and steel bar material list to ensure that the length and bending angle of the steel bars meet the design requirements; Step 3: Make a steel cage skeleton. First, determine the installation position and quantity requirements of various types of steel bars according to the requirements of the design drawings, and mark the installation position of the stirrups (2) on the segment mold, and install the stirrups (2) on the segment mold according to the marked position; secondly, install the inner arc main reinforcement (11) and the outer arc main reinforcement (12) on the segment mold, and spot weld the head and tail ends of each group of inner arc main reinforcement (11) and outer arc main reinforcement (12) in sequence to form a ring-shaped closed reinforcement; Step 4: Install the U-shaped buckle, and fasten the inner arc main reinforcement (11), the outer arc main reinforcement (12) and the stirrup (2) on the steel cage skeleton together through the U-shaped buckle (4); Step 5: Install additional reinforcement and hooks. First, hook the two ends of the hook (3) together with the longitudinal reinforcement of the stirrup (2) and tie them together with the stirrup (2) by tying wire. Secondly, install the additional reinforcement on the steel cage frame and tie them together by tying wire.

4. The method for processing epoxy steel cage of shield segment according to claim 3 is characterized in that: The material preparation operation steps in step one include: the epoxy coated steel bar raw materials selected according to the design requirements of the drawings shall be inspected and accepted in terms of variety, grade, specification, appearance quality and quality certification materials after entering the site, and witnessed sampling operations shall be carried out, and the samples shall be sent to a qualified testing unit for testing. The samples can only be used after passing the acceptance test.

5. The method for processing epoxy steel cage of shield segment according to claim 3, characterized in that: The steps of making the steel cage skeleton in step 3 include: First, clean up the construction site, make sure it is flat and clean, and conduct a safety check. Determine the installation location and direction based on the size and shape of the steel cage. Then, in strict accordance with the design drawings, a steel cage skeleton is manufactured on a segment mold that meets the design requirements, and the qualified inner arc main reinforcement (11), outer arc main reinforcement (12), stirrups (2) and hooks (3) are placed at the designated positions on the segment mold. After all dimensions are measured and inspected to meet the standards, the steel cage skeleton is assembled; Finally, the arc length, arch height, twisting degree and main and secondary reinforcement spacing of the steel cage frame are measured. If there are any unqualified areas, they need to be repaired until they are inspected and qualified before the next step can be carried out.

6. The method for processing epoxy steel cage of shield segment according to claim 3, characterized in that: The operation steps of installing the U-shaped buckle in step 4 include: installing the inner arc surface main reinforcement (11), the outer arc surface main reinforcement (12) and the U-shaped buckle (4) on the stirrup (2) in a staggered manner.

7. The method for processing epoxy steel cage of shield segment according to claim 3, characterized in that: The operation steps of installing additional reinforcement and hooks in step five include: after completing the operation steps of wire binding, inspection and acceptance operations need to be carried out. If there are unqualified areas, they need to be repaired until they pass the inspection.

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