CN110886221A - Simply-supported system track beam erecting method - Google Patents
Simply-supported system track beam erecting method Download PDFInfo
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- CN110886221A CN110886221A CN201911056115.1A CN201911056115A CN110886221A CN 110886221 A CN110886221 A CN 110886221A CN 201911056115 A CN201911056115 A CN 201911056115A CN 110886221 A CN110886221 A CN 110886221A
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- track beam
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- track
- linear adjustment
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention relates to a simple support system track beam erecting method, which comprises the following steps: step 1, checking and accepting the track beam, and installing a temporary support and initial adjustment on the track beam passing the checking and accepting; loading the track beam with the installed temporary support, and transporting the track beam to a construction site; hoisting the track beam to a set position in a construction site, and performing linear adjustment on the track beam once after the track beam is hoisted; after linear adjustment, installing KGZZ tensile supports corresponding to two ends of each track beam, and connecting each track beam with the bridge pier through the corresponding KGZZ tensile support; after the KGZZ tension support is installed, performing secondary linear adjustment on the track beam; after the track beam is stable in line shape, the temporary support is dismantled, so that the track beam is fixed on the KGZZ tension support; and installing a finger-shaped plate on the track beam to complete the erection of the track beam of the simply supported system. Compared with the prior art, the invention has the advantages of safe transportation of the track beam and improvement of the erection precision of the track beam.
Description
Technical Field
The invention relates to the technical field of track beams, in particular to a simple support system track beam erecting method.
Background
In the prior art, in the process of transporting the track beam, the track beam is easy to vibrate, impact, deform, fall or other damages; moreover, the installation accuracy of the track beam is poor easily in the process of erecting the track beam, and errors cannot be effectively reduced.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the invention aims to provide a simple support system rail beam erecting method which is safe to transport and improves installation accuracy.
The technical scheme for solving the technical problems is as follows: a simple support system track beam erecting method comprises the following steps:
step 1, checking and accepting the track beam, and installing a temporary support and initial adjustment on the track beam passing the checking and accepting; loading the track beam with the installed temporary support, and transporting the track beam to a construction site;
step 2, hoisting the track beam to a set position in a construction site, and performing linear adjustment on the track beam after the track beam is hoisted; after linear adjustment, installing KGZZ tensile supports corresponding to two ends of each track beam, and connecting each track beam with the bridge pier through the corresponding KGZZ tensile support;
step 3, after the KGZZ tensile support is installed, performing secondary linear adjustment on the track beam; after the track beam is stable in line shape, the temporary support is dismantled, so that the track beam is fixed on the KGZZ tension support; and installing a finger-shaped plate on the track beam to complete the erection of the track beam of the simply supported system.
The invention has the beneficial effects that: the track beam can be effectively transported to a construction site for installation, the safety of transporting the track beam is improved, and the track beam is prevented from being vibrated, impacted, deformed, dropped or damaged; and the track beam can be accurately installed on the bridge pier, so that the accumulated error is reduced.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the step 1 of installing a temporary support on the track beam and initially adjusting specifically comprises the following steps: and assembling and fixing the temporary support and the track beam according to a preset position, and primarily adjusting the elevation parameter, the horizontal position parameter and the superelevation parameter of the track beam according to the field actual measurement error.
The beneficial effect of adopting the further scheme is that: the safety of transporting the track beam can be guaranteed through the temporary support, and the erection precision of the track beam is improved; through preliminary adjustment, promote the installation accuracy of follow-up track roof beam.
Further, before the track beam is transported to a construction site in the step 1, the method specifically comprises the following steps: planning a transportation channel for transporting the track beam, and transporting the track beam by adopting a flat trailer; and a buffer is placed at the cushion point of the flat trailer.
The beneficial effect of adopting the further scheme is that: platform trailer transports the track roof beam, can ensure the security of track roof beam, avoids the track roof beam to damage.
Further, the track beam comprises an elevated station simply supported beam, a section yard station simply supported beam and an underground section simply supported beam.
Further, the step 2 of performing linear adjustment on the track beam in one step specifically comprises the following steps:
adjusting the beam top elevation parameter, the beam body center position parameter, the beam top ultrahigh parameter, the longitudinal slope parameter, the beam end position parameter and the support coordinate parameter of the track beam; and sequentially performing linear adjustment from the position of each underground region or segment field track circular curve to two ends, adjusting a straight line segment connected with the easement curve, and adjusting the straight line segment.
The beneficial effect of adopting the further scheme is that: the erection precision of the track beam can be improved through one-time linear adjustment, and subsequent erection adjustment is facilitated.
Further, measuring and rechecking coordinate points and elevations, rail surface ultrahigh rates and line intervals of each section of rail beam; after the track beam is installed, the alignment error actually measured and the production error of the track beam are accurately adjusted in the forward direction, the transverse direction and the vertical direction through the temporary support and the KGZZ tension support;
in the flat curve section of the track beam, linear adjustment is sequentially carried out from the position of the circular curve to the two ends of the circular curve section, firstly, the linear adjustment is carried out from the circular curve section to the relaxation curve sections at the two ends, and then, the linear section connected with the relaxation curve is adjusted.
The beneficial effect of adopting the further scheme is that: the erection precision of the track beam can be improved through the primary linear adjustment and the secondary linear adjustment.
Drawings
Fig. 1 is a flow chart of a method for erecting a simple support system track beam according to the invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, a method for erecting a simple support system rail beam comprises the following steps:
step 1, checking and accepting the track beam, and installing a temporary support and initial adjustment on the track beam passing the checking and accepting; loading the track beam with the installed temporary support, and transporting the track beam to a construction site;
step 2, hoisting the track beam to a set position in a construction site, and performing linear adjustment on the track beam after the track beam is hoisted; after linear adjustment, installing KGZZ tensile supports corresponding to two ends of each track beam, and connecting each track beam with the bridge pier through the corresponding KGZZ tensile support;
step 3, after the KGZZ tensile support is installed, performing secondary linear adjustment on the track beam; after the track beam is stable in line shape, the temporary support is dismantled, so that the track beam is fixed on the KGZZ tension support; and installing a finger-shaped plate on the track beam to complete the erection of the track beam of the simply supported system.
In the step 1, planning a transportation channel for transporting the track beam in advance, and transporting the track beam by adopting a flat trailer; according to the beam type characteristics of the track beam, a gantry crane or a truck crane is adopted as main erection mechanical equipment; various mechanical properties of the beam erecting equipment are detected before construction, and the hoisting safety of a gantry crane or a truck crane is ensured;
in order to save formal installation time, improve the utilization rate of large-scale hoisting equipment and accelerate the speed of erecting the track beam, the temporary support bracket is connected with the pier in advance according to the speed of erecting the track beam before formal installation, and a pier top operation platform is erected.
According to the construction drawing of the interval bridge, combining the site condition of a construction site and the loads of track beams with different spans, reasonably selecting a construction support, designing a scheme of a support bracket, designing and installing temporary restraint and using corresponding hoisting machinery; corresponding construction measures are adopted to prevent the track beam from overturning, and the overall stability of the support is ensured;
before the track beam is formally erected, according to the requirements of design and specification, whether a line central line, a stone pad coordinate, a stone pad elevation, the position of a support bolt hole and an embedded part meet the design requirements and the construction specification or not is rechecked, the construction precision of a pier and the stone pad is ensured to be within an allowable range, and the beam can be put on the back after the hoisting requirements are met;
checking and accepting the bridge pier, wherein the capping beam of the bridge pier, the concrete strength of the cushion stone, the specification performance of the support, the size, the elevation and the plane position of the supporting structure and the embedded part meet the design and specification requirements; and the mounting allowable errors of the bent cap, the support and the embedded part meet the requirements.
And setting a fence according to the plane arrangement of field hoisting, and carrying out traffic control on a construction field to prohibit irrelevant personnel from approaching. And mastering and cleaning the environmental conditions of the ground, the underground, the bridge deck and the high altitude in the girder erection site range.
In the above embodiment, the step 1 of installing the temporary support on the track beam and initially adjusting specifically includes the following steps: and assembling and fixing the temporary support and the track beam according to a preset position, and primarily adjusting the elevation parameter, the horizontal position parameter and the superelevation parameter of the track beam according to the field actual measurement error. Because the track beam has a large aspect ratio and a large risk of overturning, necessary overturn-preventing measures must be taken when the track beam is stored in a beam yard.
In the above embodiment, before the track beam is transported to the construction site in step 1, the method specifically includes the following steps: planning a transportation channel for transporting the track beam, and transporting the track beam by adopting a flat trailer; and a buffer is placed at the cushion point of the flat trailer. The buffer can prevent the track beam transportation in vibrations, collision damage. Before the track beam is hoisted to a set position, each door type hanger of the hoisting equipment is fixed by 2 adjustable inclined struts; the hoisting rod piece strictly complies with hoisting rules so as to prevent vibration, impact, deformation, falling or other damage in the hoisting process.
In the above embodiment, the track beam includes an elevated station simple supported beam, a section yard track simple supported beam, and an underground section simple supported beam.
In the above embodiment, the performing linear adjustment on the track beam in step 2 specifically includes the following steps:
adjusting the beam top elevation parameter, the beam body center position parameter, the beam top ultrahigh parameter, the longitudinal slope parameter, the beam end position parameter and the support coordinate parameter of the track beam; and sequentially performing linear adjustment from the position of each underground region or segment field track circular curve to two ends, adjusting a straight line segment connected with the easement curve, and adjusting the straight line segment.
The linear adjustment is a systematic process, and the construction measurement control of the pier stud cushion stone, the erection of the track beam and the accurate linear adjustment after the track beam falls belong to the linear adjustment category.
According to the designed line shape, adjusting parameters such as beam top elevation, beam body center position, beam top superelevation, longitudinal slope, beam end position, support coordinate and the like.
The adjustment sequence starts from the position of the circular curve of each underground area or segment of the track, and sequentially carries out linear adjustment towards two ends, then adjusts the straight line segment connected with the relaxation curve, and then adjusts the straight line segment to eliminate the accumulated error of the cross slope.
The up-down line of the station track beam is simultaneously carried out, which is beneficial to ensuring the line spacing, the verticality error and the plane cross slope superelevation error when the line shape is adjusted.
Minimum erection adjustment unit section requirements: the linear adjustment takes each simply-supported track beam as a node, the straight line section is integrally adjusted by taking at least three beams as a unit, the curve section is integrally adjusted by taking the whole curve section as a unit, and the station is linearly adjusted by taking the whole station track beam as a whole.
And the method can be retested at any time in the construction process, so that the adjustment precision is ensured, and the accumulated error is reduced.
In the above embodiment, the performing the secondary linear adjustment on the track beam in step 3 specifically includes the following steps:
measuring and rechecking coordinate points and elevations, rail surface ultrahigh rates and line intervals of each section of track beam; after the track beam is installed, the alignment error actually measured and the production error of the track beam are accurately adjusted in the forward direction, the transverse direction and the vertical direction through the temporary support and the KGZZ tension support;
in the flat curve section of the track beam, linear adjustment is sequentially carried out from the position of the circular curve to the two ends of the circular curve section, firstly, the linear adjustment is carried out from the circular curve section to the relaxation curve sections at the two ends, and then, the linear section connected with the relaxation curve is adjusted.
The secondary linear adjustment is the last process of the linear adjustment of the simply supported track beam, and after the support is poured, the construction precision of the track beam is affected due to the disturbance of pier top construction or other reasons, so that the secondary linear adjustment is needed.
Measurement construction deployment: and performing detailed measurement recheck according to the designed coordinate point and elevation, the track surface ultrahigh rate and the line spacing of each section of track beam.
According to the actual measurement linear error after the track beam is installed and the production error of the track beam, the adjustable temporary support is used for carrying out accurate adjustment along the bridge direction, the transverse bridge direction and the vertical direction. In this case, the temporary support device and the support are adjusted synchronously with the permanent support.
In the flat curve section, the linear adjustment is sequentially carried out from the position of the circular curve to two ends, particularly the curve section is required to extend from the circular curve section to the relaxation curve sections at two ends firstly, and then the linear section connected with the relaxation curve is adjusted to eliminate the accumulated error of the transverse slope, the large transverse slope value is controlled in the design range, the smooth and slick shape of each line is ensured, and the linear connection of two adjacent lines is ensured.
Through linear adjustment, the cross slope height of the circuit meets the design technical requirements; the rail beam is moved longitudinally and transversely to adjust the line spacing of the lines and adjust the expansion joints to meet the design technical requirements; the mounting finger plate and the support seat meet the design technical requirements.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A simple support system track beam erecting method is characterized by comprising the following steps:
step 1, checking and accepting the track beam, and installing a temporary support and initial adjustment on the track beam passing the checking and accepting; loading the track beam with the installed temporary support, and transporting the track beam to a construction site;
step 2, hoisting the track beam to a set position in a construction site, and performing linear adjustment on the track beam after the track beam is hoisted; after linear adjustment, installing KGZZ tensile supports corresponding to two ends of each track beam, and connecting each track beam with the bridge pier through the corresponding KGZZ tensile support;
step 3, after the KGZZ tensile support is installed, performing secondary linear adjustment on the track beam; after the track beam is stable in line shape, the temporary support is dismantled, so that the track beam is fixed on the KGZZ tension support; and installing a finger-shaped plate on the track beam to complete the erection of the track beam of the simply supported system.
2. The method for erecting the simply supported system track beam as claimed in claim 1, wherein the step 1 of installing the temporary support on the track beam and initially adjusting the temporary support specifically comprises the following steps: and assembling and fixing the temporary support and the track beam according to a preset position, and primarily adjusting the elevation parameter, the horizontal position parameter and the superelevation parameter of the track beam according to the field actual measurement error.
3. The method for erecting the simple support system track beam as claimed in claim 1, wherein the step 1 of transporting the track beam to a construction site further comprises the following steps: planning a transportation channel for transporting the track beam, and transporting the track beam by adopting a flat trailer; and a buffer is placed at the cushion point of the flat trailer.
4. The method for erecting the simple support system track beam as claimed in claim 1, wherein the track beam comprises an elevated station simple support beam, a section yard stock way simple support beam and an underground section simple support beam.
5. The method for erecting the simple support system track beam as claimed in claim 4, wherein the step 2 of performing linear adjustment on the track beam comprises the following steps:
adjusting the beam top elevation parameter, the beam body center position parameter, the beam top ultrahigh parameter, the longitudinal slope parameter, the beam end position parameter and the support coordinate parameter of the track beam; and sequentially performing linear adjustment from the position of each underground region or segment field track circular curve to two ends, adjusting a straight line segment connected with the easement curve, and adjusting the straight line segment.
6. The method for erecting the simple support system track beam as claimed in claim 1, wherein the step 3 of performing secondary linear adjustment on the track beam specifically comprises the following steps:
measuring and rechecking coordinate points and elevations, rail surface ultrahigh rates and line intervals of each section of track beam; after the track beam is installed, the alignment error actually measured and the production error of the track beam are accurately adjusted in the forward direction, the transverse direction and the vertical direction through the temporary support and the KGZZ tension support;
in the flat curve section of the track beam, linear adjustment is sequentially carried out from the position of the circular curve to the two ends of the circular curve section, firstly, the linear adjustment is carried out from the circular curve section to the relaxation curve sections at the two ends, and then, the linear section connected with the relaxation curve is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911056115.1A CN110886221A (en) | 2019-10-31 | 2019-10-31 | Simply-supported system track beam erecting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911056115.1A CN110886221A (en) | 2019-10-31 | 2019-10-31 | Simply-supported system track beam erecting method |
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| CN110886221A true CN110886221A (en) | 2020-03-17 |
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| CN201911056115.1A Pending CN110886221A (en) | 2019-10-31 | 2019-10-31 | Simply-supported system track beam erecting method |
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