Contact net channel fixing and hanging technology

Abstract

The invention discloses a catenary channel fixing and hanging process, which belongs to the field of catenary channel mounting processes, and comprises the following steps of: drilling a secondary lining template on a secondary lining trolley according to a design drawing, and forming a primary positioning hole, a secondary positioning hole and a plurality of common mounting holes; an overhead line system channel group is welded and assembled on the positioning tool; the T-shaped bolt slides into the catenary channel and then is temporarily fixed through glue; mounting the catenary channel group on the secondary lining template in sequence according to the main positioning hole, the auxiliary positioning hole and the common mounting hole; and after assembly is completed, moving along with the trolley, jacking and carrying out concrete pouring, and finally demolding to complete pre-burying of the catenary channel. According to the secondary formwork, the main positioning holes and the auxiliary positioning holes are formed in the secondary formwork, and the T-shaped bolts are temporarily fixed in the catenary channel through glue, so that accurate positioning of the catenary channel is guaranteed, and meanwhile the mounting efficiency of the catenary channel on the secondary formwork is improved.

Description

Technical Field

[0001] The invention belongs to the field of contact network slot installation technology, and in particular relates to a contact network slot fixing and suspension technology. Background Art

[0002] The contact network trough is a key component of the contact network system in high-speed railway tunnels, and its construction quality directly affects the safety of train operation. In the early stage, the contact network tunnel suspension device used post-planted chemical anchors, which have their own advantages and disadvantages compared to the pre-buried trough. Post-planted chemical anchors are generally constructed by the post-station contact network professionals. Post-planted chemical anchors are accurately positioned, the construction is simple and fast, and the cost is low. However, in recent years, post-planted chemical anchors in railways that have been opened have the risk of railway accidents. The main reasons are analyzed as follows: First, the fixation of the post-planted chemical anchors does not meet the requirements of the pull-out test, and the pull-out force is insufficient, causing the contact network suspension in the tunnel to fall off, causing railway accidents; second, because the tunnel secondary lining grouting is prone to voids at the arch position, the grouting is not dense or a small piece of concrete on the arch falls off together with the post-planted chemical anchor, causing railway accidents.

[0003] The pre-embedded technical solutions in the prior art are mostly to install the contact network groove on the template of the secondary lining trolley in advance. During the installation process, T-bolts are used to slide on the contact network groove and align with the mounting holes on the secondary lining template. However, since the position of the T-bolts relative to the contact network groove is not accurate, and the mounting holes on the secondary lining template are of the same size, it is difficult to install the contact network groove on the secondary lining template, the installation efficiency is low, and the pre-embedded position of the contact network groove is not accurate enough. Summary of the invention

[0004] In view of this, the present invention provides a contact network groove fixing and suspension process for solving the above-mentioned problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A contact network channel fixing and hanging process comprises the following steps:

[0007] S1. According to the design drawings, the secondary lining template on the secondary lining trolley is drilled, and active positioning holes, auxiliary positioning holes and multiple common mounting holes are set, wherein the main positioning hole and the outer diameter of the T-bolt are set with a positioning gap, the auxiliary positioning hole is a flat hole, the length direction of the flat hole is along the direction of the contact network groove, the width direction of the flat hole and the outer diameter of the T-bolt are set with a positioning gap, the length direction and the outer diameter of the T-bolt are set with a common mounting gap, and the multiple common mounting holes and the outer diameter of the T-bolt are set with a common mounting gap;

[0008] S2. Determine the spacing between adjacent contact network slots according to the design drawings, place two contact network slots on a specific tooling to ensure the spacing between adjacent contact network slots, and vertically weld multiple steel plates between the two contact network slots to form a contact network slot group;

[0009] S4. Slide multiple T-bolts into the contact network groove, and slide multiple T-bolts to the designed positions according to the design drawings, temporarily fix the T-bolts with glue, and complete the on-site acceptance of the contact network groove group;

[0010] S5. Before the trolley is in place, the space inside the secondary lining template is large, so the contact network groove group is installed on the secondary lining template in advance. First, insert the T-bolt at the end of one contact network in the contact network groove group into the main positioning hole, and then insert the T-bolt at the other end into the secondary positioning hole. After the T-bolts at both ends are inserted into the main positioning hole and the secondary positioning hole, the T-bolts at other positions are inserted into the common installation holes, and the nuts are tightened to make the groove close to the back of the trolley; lead the comprehensive grounding steel bars from the groove to the end of the secondary lining template to facilitate welding by construction workers;

[0011] S6. After the contact network channel group is pre-installed, the trolley is moved and lifted, and after accurate positioning, comprehensive grounding welding is performed;

[0012] S7. Measure whether the relative position of the channel is accurate, then close the secondary lining formwork and pour concrete;

[0013] S8. When demolding the trolley, first loosen the T-bolt and rotate the bolt 90° to release the glue fixation, then lower the second lining formwork to allow the bolt cap of the T-bolt to fall out of the contact network groove to avoid the bolt from pulling the groove and damaging the concrete around the groove.

[0014] Furthermore, in step S1, the positioning clearance between the main positioning hole and the outer diameter of the T-bolt is 0.5mm, the positioning clearance between the width direction of the flat hole and the outer diameter of the T-bolt is 0.5mm, the normal installation clearance between the length direction and the outer diameter of the T-bolt is 1-2mm, and the normal installation clearance between the ordinary mounting hole and the outer diameter of the T-bolt is 1-2mm.

[0015] Further, in step S1, the main positioning holes and the auxiliary positioning holes provided on the second lining template correspond to the two ends of one of the contact network grooves in the contact network groove group.

[0016] Furthermore, in step S4, the distance between the T-bolts at both ends of each contact network groove and the end is not less than 0.25 mm, and the spacing between the T-bolts in the middle is not greater than 1 m.

[0017] Furthermore, in step S5, each time the contact network groove group is installed before the secondary lining template, the model of the embedded groove is checked again to avoid wrong embedding or missing embedding.

[0018] The beneficial effects of the present invention are:

[0019] The present invention arranges main positioning holes and auxiliary positioning holes on the secondary lining template, and uses glue to temporarily fix T-bolts at the designed positions on the contact network grooves. After the contact network grooves and steel plates are welded into a contact network groove group, the entire contact network groove group is installed on the secondary template in the order of the main positioning holes, the auxiliary positioning holes and the common installation holes, thereby ensuring the accurate position of the contact network grooves and improving the installation efficiency of the contact network groove group on the secondary lining template. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 This is the installation diagram of the secondary lining template and the contact network channel group;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the contact network groove group. Figure 1 ;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the contact network groove group. Figure 2 ;

[0024] Figure 4 It is a schematic diagram of the structure of a T-bolt;

[0025] Figure 5 It is a schematic diagram of the positions of the main positioning holes, auxiliary positioning holes and common installation holes on the secondary lining template;

[0026] Among them, in the figure:

[0027] 10-secondary lining formwork, 11-main positioning hole, 12-secondary positioning hole, 13-ordinary mounting hole, 20-contact network groove group, 21-contact network groove, 22-steel plate, 30-T-bolt. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Refer to the attached Figure 1-5 As shown, the present invention provides a contact network groove fixing and hanging process, comprising the following steps: S1. According to the design drawings, the secondary lining template 10 on the secondary lining trolley is opened, and a main positioning hole 11, a secondary positioning hole 12 and a plurality of common mounting holes 13 are set, wherein the main positioning hole 11 and the outer diameter of the T-bolt 30 are set with a positioning gap, the secondary positioning hole 12 is a flat hole, the length direction of the flat hole is along the direction of the contact network groove 21, the width direction of the flat hole and the outer diameter of the T-bolt 30 are set with a positioning gap, the length direction and the outer diameter of the T-bolt 30 are set with a common mounting gap, and the plurality of common mounting holes 13 and the outer diameter of the T-bolt 30 are set with a common mounting gap;

[0030] In the optional embodiment, the positioning clearance between the positioning hole and the outer diameter of the T-bolt 30 is 0.5 mm, the positioning clearance between the width direction of the flat hole and the outer diameter of the T-bolt 30 is 0.5 mm, the general installation clearance between the length direction and the outer diameter of the T-bolt 30 is 1-2 mm, and the general installation clearance between the general installation hole 13 and the outer diameter of the T-bolt 30 is 1-2 mm;

[0031] In the optional embodiment, the main positioning hole 11 and the auxiliary positioning hole 12 provided on the second lining template 10 correspond to the two ends of one of the contact network grooves 21 in the contact network groove group 20, such as Figure 5 ;

[0032] S2. Determine the spacing between adjacent contact network grooves 21 according to the design drawings, place two contact network grooves 21 on a specific tooling, ensure the spacing between adjacent contact network grooves 21, and vertically weld a plurality of steel plates 22 between the two contact network grooves 21 to form a contact network groove group 20;

[0033] S4. Slide multiple T-bolts 30 into the contact network groove 21, and slide multiple T-bolts 30 to the designed positions according to the design drawings, temporarily fix the T-bolts 30 with glue, and complete the on-site acceptance of the contact network groove group 20; the distance between the T-bolts 30 at both ends of each contact network groove 21 is not less than 0.25mm, and the spacing between the T-bolts 30 in the middle is not more than 1m;

[0034] S5. Before the trolley is in place, the space inside the secondary lining template 10 is large, and the contact network groove group 20 is installed on the secondary lining template 10 in advance. First, insert the T-bolt 30 at the end of one contact network in the contact network groove group 20 into the main positioning hole 11 a little, and then insert the T-bolt 30 at the other end into the secondary positioning hole 12 a little. After the T-bolts 30 at both ends are inserted into the main positioning hole 11 and the secondary positioning hole 12, the T-bolts 30 at other positions are inserted into the common installation holes 13, and the nuts are tightened to make the groove close to the back of the trolley; lead the comprehensive grounding steel bars from the groove to the end of the secondary lining template 10 to facilitate welding by construction personnel;

[0035] Each time the contact network groove group 20 is installed before the secondary lining template 10, the model of the embedded groove is checked again to avoid wrong embedding or missing embedding;

[0036] S6. After the contact network channel group 20 is pre-installed, the trolley is moved and lifted, and after accurate positioning, comprehensive grounding welding is performed;

[0037] S7. Measure the relative position of the channel to see if it is accurate, then close the second lining formwork 10, and then pour the concrete;

[0038] S8. When demolding the trolley, first loosen the T-bolt 30 and rotate the bolt 90° to release the glue fixation, and then lower the second lining formwork 10 to make the bolt cap of the T-bolt 30 fall out of the contact network groove 21 to prevent the bolt from pulling the groove and damaging the concrete around the groove.

[0039] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0040] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A contact network channel fixed suspension process, characterized in that: The steps include: S1. According to the design drawings, the secondary lining template (10) on the secondary lining trolley is opened, and a main positioning hole (11), a secondary positioning hole (12) and a plurality of common mounting holes (13) are provided, wherein a positioning gap is set between the main positioning hole (11) and the outer diameter of the T-bolt (30), the secondary positioning hole (12) is a flat hole, the length direction of the flat hole is along the direction of the contact network groove (21), the width direction of the flat hole and the outer diameter of the T-bolt (30) are set with a positioning gap, the length direction and the outer diameter of the T-bolt (30) are set with a common mounting gap, and the plurality of common mounting holes (13) and the outer diameter of the T-bolt (30) are set with a common mounting gap; S2. Determine the spacing between adjacent contact network grooves (21) according to the design drawings, place two contact network grooves (21) on a specific tooling, ensure the spacing between adjacent contact network grooves (21), and vertically weld multiple steel plates (22) between the two contact network grooves (21) to form a contact network groove group (20); S4. Slide multiple T-bolts (30) into the contact network groove (21), and slide multiple T-bolts (30) to the designed position according to the design drawings, temporarily fix the T-bolts (30) with glue, and complete the on-site acceptance of the contact network groove group (20); S5. Before the trolley is in place, the space inside the second lining template (10) is large, and the contact network groove group (20) is installed on the second lining template (10) in advance. First, insert the T-bolt (30) at the end of one contact network in the contact network groove group (20) into the main positioning hole (11), and then insert the T-bolt (30) at the other end into the secondary positioning hole (12). After the T-bolts (30) at both ends are inserted into the main positioning hole (11) and the secondary positioning hole (12), the T-bolts (30) at other positions are inserted into the common installation holes (13), and the nuts are tightened to make the groove close to the back of the trolley; lead the integrated grounding steel bar from the groove to the end of the second lining template (10) to facilitate welding by construction personnel; S6. After the contact network channel group (20) is pre-installed, the trolley is moved and lifted, and after accurate positioning, comprehensive grounding welding is performed; S7. Measure the relative position of the groove to see if it is accurate, then close the second lining formwork (10) and then pour concrete; S8. When demoulding the trolley, first loosen the T-bolt (30) and rotate the bolt 90° to release the glue fixation, then lower the second lining formwork (10) to allow the bolt cap of the T-bolt (30) to come out of the contact network groove (21) to prevent the bolt from pulling the groove and damaging the concrete around the groove.

2. A contact network channel fixing and hanging process according to claim 1, characterized in that: In step S1, the positioning clearance between the main positioning hole (11) and the outer diameter of the T-bolt (30) is 0.5 mm, the positioning clearance between the width direction of the flat hole and the outer diameter of the T-bolt (30) is 0.5 mm, the general installation clearance between the length direction and the outer diameter of the T-bolt (30) is 1-2 mm, and the general installation clearance between the general installation hole (13) and the outer diameter of the T-bolt (30) is 1-2 mm.

3. A contact network channel fixing and hanging process according to claim 1, characterized in that: In step S1, the main positioning hole (11) and the auxiliary positioning hole (12) provided on the second lining template (10) correspond to the two ends of one of the contact network grooves (21) in the contact network groove group (20).

4. A contact network channel fixing and hanging process according to claim 1, characterized in that: In step S4, the distance between the T-bolts (30) at both ends of each contact network channel (21) and the end is not less than 0.25 mm, and the spacing between the T-bolts (30) in the middle is not greater than 1 m.

5. A contact network channel fixing and hanging process according to claim 1, characterized in that: In step S5, each time before the contact network groove group (20) is installed on the secondary lining template (10), the model of the pre-buried groove is checked again to avoid wrong burying or missing burying.

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