CN115506253A

CN115506253A - Segment assembly turnout beam on-site construction process

Info

Publication number: CN115506253A
Application number: CN202211206762.8A
Authority: CN
Inventors: 钱振地; 翟婉明; 毕小毛; 周华; 赵西蓉; 郭光辉; 崔进福; 张帅; 吴海涛; 张磊; 肖仕伟; 蔡成标; 陈再刚; 冯开胜; 蹇荣辉; 肖大庆; 覃婷; 王担担; 刘学毅; 王平
Original assignee: Chengdu Tianfu Rail-Tech Valley Co ltd
Current assignee: Chengdu Tianfu Rail-Tech Valley Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2022-12-23

Abstract

The invention relates to a segment assembly turnout beam on-site construction process, which comprises the following steps: constructing a plurality of supporting units on a flat and hardened horizontal foundation at intervals longitudinally, and sequentially hoisting each section of beam to the supporting units by adopting a gantry crane; after all the sectional beams are hoisted in place, finely adjusting the sectional beams and temporarily fixing the sectional beams with the supporting unit; the reinforcing steel bar bundle is perforated, tensioned and fixed, and grouted and anchored, so that the splicing construction of the section beam is realized; hoisting the turnout steel rail assembly to the bridge deck of the segmental assembled turnout beam, assembling, and fixing the turnout steel rail in the rail groove of the segmental assembled turnout beam by adopting a temporary fixing clamp after the turnout steel rail assembly reaches the standard; hoisting the segment-assembled turnout beam to a pier by using a cross-line gantry crane unit; the turnout steel rail in the rail groove and the interval embedded steel rail are accurately aligned and fixed in a gluing way; and removing the internal temporary fixing clamps section by section, and pouring light foaming concrete section by section into the rail groove to lock and fix the turnout rail. The construction method is suitable for segment assembling turnout box beams and also suitable for segment assembling turnout track plate beams.

Description

Segment assembled turnout beam on-site construction process

Technical Field

The invention relates to the technical field of turnout beams, in particular to a section assembly turnout beam field construction process.

Background

A switch is a line connection device for switching a rolling stock from one track to another. The turnout can give full play to the passing capacity of the line. Even if a single-track railway is paved with turnouts, a section of fork line with the length larger than that of a train is built, and the train can be split. Thus, a switch plays an important role on a railway line.

The box girder is one of bridge engineering center girders, the interior of the box girder is hollow, and flanges are arranged on two sides of the upper part of the box girder. The box girder of the reinforced concrete structure is divided into a prefabricated box girder and a cast-in-place box girder. The turnout box girder is a box girder for laying turnout.

The existing turnout box girders are full-hole turnout box girders, and are ultra-wide and ultra-long. Due to mountain land (dual-purpose for military and civil) rail traffic, the transportation conditions of a construction site are limited, and the whole turnout box girder is difficult to transport to the construction site. The company designs turnout section box girders, conveys the turnout section box girders to a construction site, assembles the turnout section box girders on the construction site, and then obtains the section assembled turnout section box girders. In this manner, each switch section box beam is not long or wide, and can be adapted to various transportation conditions.

However, how to quickly assemble the box girders of the turnout sections after the box girders of the turnout sections are transported to a construction site is also a problem to be considered.

Disclosure of Invention

The application provides a segmental assembling turnout beam on-site construction process for solving the technical problems.

The application is realized by the following technical scheme:

the on-site construction process of the segmental assembling turnout beam comprises the following steps:

constructing a plurality of supporting units at intervals longitudinally on a flat and hardened horizontal foundation, wherein the plurality of supporting units are used for sequentially supporting the splicing construction of a plurality of section beams, and a post-tensioned prestressed duct is reserved in each section beam;

sequentially hoisting each section of beam to a supporting unit by adopting a gantry crane;

after all the sectional beams are hoisted in place, finely adjusting the sectional beams and temporarily fixing the sectional beams with the supporting unit;

the reinforcing steel bar bundle is perforated, tensioned and fixed, and grouted and anchored, so that the splicing construction of the section beam is realized;

hoisting the turnout steel rail assembly to the bridge deck of the segmental assembled turnout beam, assembling, and fixing the turnout steel rail in the rail groove of the segmental assembled turnout beam by adopting a temporary fixing clamp after the turnout steel rail assembly reaches the standard;

hoisting the segment-assembled turnout beam to a pier by using a cross-line gantry crane unit;

the turnout steel rail in the rail groove and the interval embedded steel rail are accurately aligned and fixed in a gluing way;

and removing the internal temporary fixing clamps section by section, and pouring light foaming concrete section by section into the rail groove to lock and fix the turnout rail.

Optionally, the support unit includes at least one pair of i-beams, and the i-beams may or may not have a positioning boundary line adapted to the segment beam. Particularly, according to different widths of the section beams, positioning boundary lines with standard widths are engraved at two ends of the top surface of the upper flange of the I-shaped steel beam.

Optionally, the left end and the right end of the I-shaped steel beam are provided with a segmental beam positioning and fixing clamp by bolts; after the section beams are finely adjusted, the section beams are temporarily fixed by adopting the left and right section beam positioning and fixing clamps.

Particularly, the section beam positioning and fixing clamp comprises a flange clamping sleeve matched with a flange of the I-shaped steel beam and a limiting plate for transversely limiting the section beam, the bottom of the limiting plate is connected with the flange clamping sleeve, and the flange clamping sleeve is provided with a threaded hole; the limiting plate is provided with or without a threaded hole, and the limiting plate and the flange clamping sleeve are integrally manufactured or not integrally manufactured.

Optionally, the top of the limiting plate is connected with a guide arc plate for guiding the beam to fall, and the guide arc plate and the limiting plate are integrally manufactured or not integrally manufactured.

Optionally, when the segment beams are hoisted in place, a guide plate for controlling the longitudinal position is arranged between two adjacent segment beams, and the guide plate and the segment beams are fixedly bonded. The guide plate is preferably a plastic thin plate and can prevent collision.

Optionally, the segment-assembled turnout beam is formed by splicing 7 segments of beams; on the basis of the leveled and hardened ground, corresponding to the positions of 7 sections of section beams, fixedly arranging a pair of I-shaped steel beams corresponding to each section beam as a supporting unit; the pair of I-shaped steel beams are positioned at the beam ends of the corresponding section beams and have intervals with the corresponding beam end surfaces.

Optionally, a walking steel rail is laid on one side in the span line, and the movable tarpaulin workshop walks on the walking steel rail; the movable tarpaulin workshop can walk along the walking steel rails to cover the plurality of section beams; and the operations of perforating, tensioning and fixing, grouting and anchoring of the post-tensioned prestressed steel bar bundles are carried out in a movable tarpaulin workshop.

Compared with the prior art, the method has the following beneficial effects:

1, the turnout beam assembly of the segmental assembling is carried out on site, the transportation is convenient, and the turnout beam assembly is suitable for the conditions of limited transportation conditions such as mountain and ground rail transportation and the like;

2, the assembly platform provided by the application is convenient for rapid assembly on site, and the construction method is simple and easy to master;

3, the turnout box girder is provided with the steel rail groove, and the turnout steel rail is locked by the light foamed concrete, so that the functions of the track and the bridge are integrated, the workload is saved, the construction cost is reduced, and the cost performance is high;

4, the construction method is suitable for assembling turnout box beams and turnout plate beams by sections.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is a top view of a platform body according to an embodiment;

FIG. 2 is a three-dimensional view of one of the switch segment rail plate beams and a portion of the support unit in an embodiment;

figure 3 is a schematic illustration of one of the switch segment rail plate beams, portions of the support unit and the control guide plate in an embodiment;

FIG. 4 is a schematic view of the positioning and fixing clamp for the sectional beam of the embodiment being fitted over an I-beam;

FIG. 5 is a schematic structural view of a positioning and fixing jig for a sectional beam according to an embodiment;

FIG. 6 is a schematic view of sections 1-7 of a segmented beam being hoisted onto a platform body;

FIG. 7 is a top view of the segmental assembled turnout beam of the embodiment;

FIG. 8 is a three-dimensional view of a segment sectional fabricated turnout rail beam of an embodiment;

FIG. 9 is a three-dimensional view of a segmental split turnout box beam in an embodiment;

FIG. 10 is a layout of a construction site in the embodiment;

fig. 11 is a schematic diagram of the segmental assembling turnout box girder erected on a pier in the embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. It should be noted that, in this specification, each embodiment is described in a progressive manner, and each embodiment focuses on differences from other embodiments, and portions that are the same as and similar to each other in each embodiment may be referred to.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, which are merely used for convenience of description and simplification of description, and do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

In order to facilitate assembling the segmental beams, the present embodiment provides an assembling platform for segmental assembling turnout beams, the assembling platform includes a flat and hardened ground base and a platform body, as shown in fig. 1, the platform body includes a plurality of supporting units arranged at intervals in the longitudinal direction, and the plurality of supporting units are used for sequentially supporting the plurality of segmental beams.

In one possible design, the bearing unit is provided with a positioning boundary line 3. In one possible design, the bearing unit comprises a pair of i-section steel beams 2, the pair of i-section steel beams 2 being used to support one of the section beams. Specifically, as shown in fig. 1 to 4, positioning boundary lines 3 of a standard width are scribed at both ends of the top surface of the upper flange of the i-steel beam 2 according to different widths of the sectional beams.

In one possible design, as shown in fig. 4, sectional beam positioning and fixing clamps 4 are installed at the left and right ends of the i-section steel beam 2, and the left and right sectional beam positioning and fixing clamps 4 are used to temporarily fix the sectional beams from both sides. Specifically, as shown in fig. 5, the section beam positioning and fixing clamp 4 includes a flange sleeve 41 adapted to the flange of the i-beam 2 and a limiting plate 42 for laterally limiting the section beam, the bottom of the limiting plate 42 is connected to the flange sleeve 41, the flange sleeve 41 has a threaded hole 43, and the flange sleeve 41 and the i-beam 2 can be fastened by installing a bolt. Optionally, the limiting plate 42 is also provided with a threaded hole 43, and the flange clamp sleeve 41 and the segmental beam can be fastened by installing a bolt during use.

In one possible design, the limiting plate 42 is manufactured integrally with the flange ferrule 41. In particular, a steel plate may be integrally formed.

In one possible design, as shown in fig. 5, a guiding arc plate 44 is connected to the top of the limiting plate 42, and the guiding arc plate 44 is used for guiding the beam falling. The guide arc plate 44 may or may not be integrally formed with the retainer plate 42.

In a possible design, as shown in fig. 3, the support unit further comprises a guide plate 5 for longitudinal position control when the segment beam is hoisted into position, the guide plate 5 being adhesively secured to the segment beam. Optionally, when the segment beams are hoisted in place, a plastic thin plate is arranged between two adjacent segment beams to serve as the guide plate 5, and the guide plate 5 can also prevent the ends of the two segment beams from colliding.

The number of the supporting units is reasonably set according to the number of the section beams. As shown in fig. 7-9, taking the example that the segmental assembled turnout beam 100 is spliced by 7 segmental beams, the 7 segmental beams are respectively: a first segment 11, a second segment 12, a third segment 13, a fourth segment 14, a fifth segment 15, a sixth segment 16 and a seventh segment 17. Each segment is integrally formed, and a post-tensioned pre-stressed pore channel is reserved in each segment. Correspondingly, there are 7 supporting units, and there are 7 pairs of I-beams 2.

It should be noted that the segmental split switch beam 100 can be a box beam or a rail plate beam, as shown in fig. 8 and 9. In one possible design, sections with the length of 15-25 m are adopted in plains and hills to assemble turnout box girders; in particular, 20m and 25m box girders are adopted in plains and hills. The mountain area and the mountain top can adopt 5m and 10m rail plate beams, so that the transportation is convenient.

The bridge deck of the segmental assembled turnout beam 100 is provided with a deck rail groove 101 formed in a concave mode. In one possible design, the top surface of the segmental split switch beam 100 has a pair of straight track grooves and a pair of side track grooves.

The section assembling turnout beam site construction process disclosed by the embodiment comprises the following steps:

s1, preparing for construction;

and (3) tamping and hardening one side in the span line at the constructed position of the turnout pier 6 in the station yard section on the mountain track construction site, and constructing an assembly platform.

Specifically, firstly selecting 30m of span line and 60m of span line to tamp and harden the traveling wheel foundation of the mobile span line gantry crane, and corresponding to 7 sections of section beams on the leveled and hardened ground foundation, wherein each section beam is fixedly provided with a pair of I-shaped steel beams 2 as a supporting unit. Particularly, each I-shaped steel beam 2 is arranged at the position of 0.6 m of the end of a sectional beam, and the plurality of supporting units are used for sequentially supporting sectional beam splicing construction.

S2, paving the traveling steel rail on the ground.

As shown in fig. 10, in one possible design, the assembly platform footprint is 25m by 10m; and paving traveling rails of the movable tarpaulin workshop at the inner width of 9.5m of the horizontal foundation of the assembly platform, wherein the length of the traveling rails of the movable tarpaulin workshop is 50m, and the width of the shed is 9m.

And S3, assembling and debugging the cross-line gantry crane level movable tarpaulin workshop.

And S4, after the section beams of 1-7 sections are transported to the site in sections, as shown in figures 6 and 10, hoisting the section beams to an assembly platform according to the serial numbers 1-7 by adopting a gantry crane.

S5, hoisting all the section beams of 1-7 sections in place, and accurately positioning through the positioning boundary line 3; and temporarily fixed by the sectional beam positioning fixing jigs 4.

And S6, moving the movable tarpaulin workshop to the position of the 1-7 section beams for working in any weather.

And S7, performing post-tensioned prestressed reinforcement bundle pipe penetrating, tensioning, grouting and anchor sealing operation in the movable tarpaulin workshop and on the assembly platform. Specifically, the post-tensioned prestressed reinforcement bundles are sequentially penetrated in post-tensioned prestressed ducts of 1-7 sections of section beams, the prestressed reinforcement bundles are tensioned and fixed, grouting and anchor sealing are performed in the post-tensioned prestressed ducts, and therefore a plurality of sections are longitudinally assembled together, as shown in fig. 7.

And S8, moving away the tarpaulin workshop, hoisting the turnout steel rail assembly to the bridge deck of the section assembled turnout beam 100, assembling, and fixing the turnout in the bridge deck rail groove 101 of the section assembled turnout beam 100 by adopting a temporary fixing clamp after repeated fine adjustment reaches the standard.

S9, installing turnout signal switching equipment, and manually and electrically adjusting in place.

S10, mounting a bridge support on a turnout pier 6, hoisting a section assembled turnout beam 100 to the pier 3 by adopting a cross-line gantry crane unit, adjusting and fixing the bridge support, and transferring the cross-line gantry crane as shown in FIG. 11; in FIG. 11, the turnout box girders are assembled into segments, one span is 20m, and the distance between every two piers is 3 m; and if the turnout plate beam is segmented and assembled, the span is 10m.

S11, precisely aligning the turnout steel rail in the bridge deck rail groove 101 with the interval embedded steel rail, and gluing and fixing.

And S12, mounting turnout switch rail electric control signal equipment, and manually shaking the industrial and electric joint to adjust the turnout switch rail to be in place.

S13, removing the temporary turnout fixing clamps section by section, pouring light foamed concrete section by section into the bridge deck rail groove 101, and after all construction is finished, finely adjusting the interior of the switch rail section to reach the standard.

And S14, after all turnout beams, indoor and outdoor signal equipment and power equipment in the station yard are finished, electrifying to carry out power and electricity fine adjustment until the turnout beams reach the standard.

And S15, finishing construction.

The above embodiments are provided to explain the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The on-site construction process of the segmental assembling turnout beam is characterized in that: the method comprises the following steps:

2. The on-site construction process of the segment assembling turnout beam according to claim 1, wherein: the supporting unit comprises at least one pair of I-shaped steel beams, and positioning boundary lines matched with the section beams are arranged on the I-shaped steel beams or not arranged on the I-shaped steel beams.

3. The on-site construction process of the segment assembling turnout beam according to claim 2, wherein: according to different widths of the sectional beams, positioning boundary lines with standard widths are engraved at two ends of the top surface of the upper flange of the I-shaped steel beam.

4. The on-site construction process of the segment assembling turnout beam according to claim 2 or 3, wherein: the left end and the right end of the I-shaped steel beam are provided with a segmental beam positioning and fixing clamp by bolts; after the segmental beam is finely adjusted, the segmental beam is temporarily fixed by adopting the left and right segmental beam positioning and fixing clamps.

5. The on-site construction process of the segment assembling turnout beam according to claim 4, wherein: the section beam positioning and fixing clamp comprises a flange clamping sleeve matched with the flange of the I-shaped steel beam and a limiting plate for transversely limiting the section beam, the bottom of the limiting plate is connected with the flange clamping sleeve, and a threaded hole is formed in the flange clamping sleeve;

the limiting plate is provided with or not provided with a threaded hole, and the limiting plate and the flange clamping sleeve are integrally manufactured or not integrally manufactured;

the top of the limiting plate is connected or not connected with a guide arc plate for guiding the beam falling, and the guide arc plate and the limiting plate are integrally manufactured or not integrally manufactured.

6. The on-site construction process of the segment assembling turnout beam according to any one of claims 1-3 and 5, wherein: when the segmental girders are hoisted in place, a guide plate for controlling the longitudinal position is arranged between two adjacent segmental girders, and the guide plate is fixedly bonded with the segmental girders.

7. The on-site construction process of the segment assembling turnout beam according to claim 6, wherein: the guide plate is a plastic thin plate.

8. The on-site construction process of the segmental assembled turnout beam according to any one of claims 1-3, 5 and 7, wherein: the section assembling turnout beam is formed by splicing 7 sections of section beams;

on the basis of the flat hardened horizontal ground, corresponding to the positions of 7 sections of beams, fixedly arranging a pair of I-shaped steel beams corresponding to each section of beam as a supporting unit;

the pair of I-shaped steel beams are positioned at the beam ends of the corresponding section beams and have intervals with the corresponding beam end surfaces.

9. The on-site construction process of the segment assembling turnout beam according to claim 8, wherein: each I-shaped steel beam is 0.6 m away from the end face of the corresponding section beam.

10. The on-site construction process of the segmental assembled turnout beam according to any one of claims 1-3, 5, 7 and 9, characterized in that: a travelling steel rail is laid on one side in the span line, and the movable tarpaulin workshop travels on the travelling steel rail;

the movable tarpaulin workshop can walk along the walking steel rails to cover the plurality of section beams;

and the operations of punching, tensioning and fixing, grouting and sealing the anchor of the post-tensioned prestressed reinforcement bundles are carried out in a movable tarpaulin workshop.