CN111501438A - Continuous rigid frame PC track beam line shape adjusting construction method - Google Patents
Continuous rigid frame PC track beam line shape adjusting construction method Download PDFInfo
- Publication number
- CN111501438A CN111501438A CN202010391308.9A CN202010391308A CN111501438A CN 111501438 A CN111501438 A CN 111501438A CN 202010391308 A CN202010391308 A CN 202010391308A CN 111501438 A CN111501438 A CN 111501438A
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- Prior art keywords
- track beam
- adjusting
- track
- linear
- screw rod
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/08—Tracks for mono-rails with centre of gravity of vehicle above the load-bearing rail
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/06—Height or lateral adjustment means or positioning means for slabs, sleepers or rails
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a construction method for adjusting the linear shape of a continuous rigid frame PC track beam, which is characterized in that after the erection of the continuous rigid frame PC track beam is finished, the horizontal, longitudinal and vertical positions of the PC track beam are adjusted by using a linear adjusting tool, and the linear adjustment comprises the following steps: firstly, a PC track beam falls and is temporarily fixed; secondly, adjusting the plane of the PC track beam; thirdly, adjusting the height of the PC track beam; fourthly, locking the PC track beam; and fifthly, retesting the PC track beam. The invention can determine the transverse bridge position of the track beam, adjust the plane position and the verticality of the track beam and accurately adjust the elevation of the track beam, so that the state of the track beam meets the design requirement of installation accuracy.
Description
Technical Field
The invention relates to a track beam, in particular to a construction method for adjusting the linear shape of a continuous rigid frame PC track beam.
Background
At present, the straddle type monorail traffic lines which are put into operation at home comprise Chongqing rail traffic No. 2 lines and No. 3 lines. Chongqing track traffic No. 2 line is the first domestic straddle type monorail traffic line successfully operated by introducing foreign advanced technology for the first time in China, and is mainly in a simply supported PC track beam structure form. Due to the characteristics of straddle type monorail traffic, the track beam is not only a bearing structure, but also a track structure, so that the PC track beam forms a track line shape according to the horizontal curve, vertical curve (the horizontal curve refers to the curve at the turning position of a line in a plane line shape, the vertical curve refers to the curve connecting two adjacent broken sections by taking a variable slope point as an intersection point on the longitudinal section of the line) and the transverse design requirements in the manufacturing and erection processes of the track beam, and in addition, embedded parts and assembly parts such as finger-shaped plate seats, contact rails and the like are required to be preset at the beam end. The linear quality of the track directly influences the operation stability and riding comfort of the monorail vehicle. Therefore, it is necessary to develop a construction method suitable for adjusting the line shape of the continuous rigid frame PC track beam.
CN104032681A discloses a method for adjusting the alignment of a track beam bridge of a straddle type monorail transit system after simply supporting, which cancels on-site open fire operation when the method is used for adjusting the alignment of a precast track beam bridge, reduces self-weight deflection generated by the precast track beam in the simply supporting stage, prevents the track beam from falling, and improves the safety in the construction process.
CN109853397A discloses a linear adjusting and limiting device for a straddle type monorail PC track beam and a using method thereof, wherein the track beam is placed on a pier body bent cap, the limiting device comprises a plurality of limiting mechanisms, and the track beam is connected with the pier body bent cap through the limiting mechanisms; stop gear includes the lead screw, lead screw one end is connected with the track roof beam, and the other end is connected with pier shaft bent cap. Its public "a stop device for track roof beam linear adjustment", because, the track roof beam belongs to high altitude construction when laying, during linear adjustment, if do not have stop device to come the motion range of constraint track roof beam, the potential safety hazard takes place easily, so in order to avoid the existence of such problem, it is through setting up stop device, through the setting of lead screw, the lead screw both ends are connected with pier shaft bent cap and track roof beam respectively for more production the relation of being connected between track roof beam and the pier shaft bent cap, in order to guarantee the security of follow-up construction.
The technical solutions disclosed in the above patent documents are, of course, a useful search in the field of said technology.
Disclosure of Invention
The invention aims to provide a continuous rigid frame PC track beam linear adjustment construction method which can determine the transverse bridge position of a track beam, adjust the plane position and the verticality of the track beam and accurately adjust the elevation of the track beam so that the state of the track beam meets the installation precision design requirement.
The standard beam length of the single continuous rigid frame PC track beam is 20m, 25m, 30m and the like, the standard beam is generally in a 3 × 30m form as a whole, the beam body is a solid rectangular section, the height of a mid-span beam is 1.6m, the height of a fulcrum beam is 2.2m, the beam width is 0.69m, the weight of the 30m single PC track beam is about 84t, a single track vehicle directly runs on the PC track beam, the track beam is a single-line beam, and the horizontal curve and the vertical curve of a line (the horizontal curve refers to the curve at the turning position of the line in a plane shape, and the vertical curve refers to the curve connecting two adjacent broken sections by taking a variable slope point as an intersection point on the longitudinal section of the line) and the transverse super-height are directly realized on the line shape of the track beam.
The invention relates to a construction method for adjusting the linear shape of a continuous rigid frame PC track beam, which is characterized in that after the continuous rigid frame PC track beam is erected, the horizontal, longitudinal and vertical positions of the PC track beam are adjusted by using a linear adjusting tool, and the linear adjustment comprises the following steps:
firstly, a PC track beam falls and is temporarily fixed;
when the PC track beam falls, the linear adjusting tool is used for ensuring that the PC track beam falls vertically, so that overturning is avoided, and meanwhile, the transverse bridge position of the track beam is basically determined; after the track beam falls, one end of an adjusting screw rod of the linear adjusting tool is fixedly connected to a bent cap screw rod at the upper end of the bent cap; the other end of the adjusting screw is fixedly connected to a track beam screw rod on the side surface of the PC track beam, and the PC track beam is temporarily locked;
secondly, adjusting the plane of the PC track beam;
after the PC track beam falls, firstly, a jack of a linear adjusting tool is installed on an adjusting support of a cover beam, the upper end of the jack props against the PC track beam, and the PC track beam is jacked by about 1 cm; then, adjusting the transverse bridge position of the PC track beam through an adjusting screw of the linear adjusting tool; when the transverse bridge position of the PC track beam meets the precision requirement, the adjusting screw is screwed down, and the transverse bridge position of the PC track beam is fixed;
thirdly, adjusting the height of the PC track beam;
after the transverse bridge direction position of the PC track beam is determined, actually measuring the measuring point and control point data of the PC track beam by using a three-dimensional coordinate instrument, and accurately adjusting the transverse bridge direction of the PC track beam according to the measured control point data: meanwhile, a jack and a slope adjusting block arranged between the embedded support member of the cover beam and the in-beam support member of the PC track beam are utilized to accurately adjust the elevation of the PC track beam; after the elevation is finely adjusted, rechecking the three-dimensional coordinates of the measuring points by using a three-dimensional coordinate instrument, and repeatedly adjusting by using a linear adjusting tool until the installation precision of the PC track beam meets the design requirement;
fourthly, locking the PC track beam;
after the elevation of the PC track beam is finely adjusted, welding and fixing the pre-embedded supporting member of the cover beam, the slope adjusting block and the in-beam supporting member of the PC track beam, and locking the PC track beam;
fifthly, retesting the PC track beam;
and after the PC track beam is locked for two hours, retesting the data of the measuring points and the control points of the PC track beam by using a three-dimensional coordinate instrument, and if the data has deviation, adjusting by using a linear adjusting tool until the design requirement is met.
Further, the linear adjustment tool comprises an adjusting screw, a track beam screw rod, a cover beam screw rod, a jack and a slope adjusting block.
The invention has the beneficial effects that:
and when the linear adjustment is carried out, the uplink and downlink lines are synchronously carried out, so that the line spacing, the verticality and the like are favorably ensured. In the flat curve section, linear adjustment is sequentially carried out from the position of the circular curve to two ends, particularly in a large transverse slope section, the linear adjustment must be carried out from the circular curve section to the relaxation curves at the two ends, and then the linear section connected with the relaxation curves is adjusted to eliminate the accumulated error of the transverse slope.
After the PC track beam is finely adjusted, retesting the overall linear shape of the track beam in a single interval, wherein the standard allowable error of a flat curve (linear distance) is (0, 25 mm), the deviation of the flat curve of the track beam in the single interval is measured in an actual measurement mode is 5 mm-8 mm, the standard error of a vertical curve is (-15 mm, 30 mm), the deviation of the vertical curve of the track beam in the single interval is measured in an actual measurement mode is-3 mm, and the linear shapes of the flat curve and the vertical curve meet the standard requirements.
Drawings
FIG. 1 is a schematic view of a temporary PC rail beam attachment;
FIG. 2 is a schematic view of PC rail beam plane adjustment;
FIG. 3 is a schematic view of PC rail beam elevation adjustment;
FIG. 4 is a schematic illustration of a PC rail beam lock;
FIG. 5 is a schematic diagram of a retest of a PC rail beam.
In the figure:
1-PC track beam, 11-track beam screw rod, 12-beam inner support member, 13-;
2-a cover beam, 21-a cover beam screw rod, 22-a pre-embedded support member and 23-an adjusting support;
3-adjusting screw, 5-jack, 6-adjusting slope block;
8-three-dimensional coordinate instrument.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, in the construction method for adjusting the linear shape of the continuous rigid frame PC track beam, after the erection of the continuous rigid frame PC track beam is completed, the horizontal, longitudinal and vertical positions of the PC track beam are adjusted by using a linear adjustment tool, and the linear adjustment comprises the following steps:
firstly, a PC track beam falls and is temporarily fixed;
referring to fig. 1, when a PC track beam 1 falls, a linear adjusting tool is used to ensure that the PC track beam 1 falls vertically, so as to avoid overturning, and simultaneously, the transverse bridge position of the track beam is basically determined; after the track beam falls, one end of an adjusting screw 3 of the linear adjusting tool is fixedly connected to a bent cap screw rod 21 (connected by a screw rod seat) at the upper end of a bent cap 2, and the diameter of a bent cap reserved hole through which the bent cap screw rod penetrates is phi 60 mm; the other end of the adjusting screw rod 3 is fixedly connected to a track beam screw rod 11 on the side surface of the PC track beam 1 to temporarily lock the PC track beam;
secondly, adjusting the plane of the PC track beam;
referring to fig. 2, after the PC track beam 1 falls, a jack 5 of a linear adjusting tool is firstly installed on an adjusting support 23 of the cover beam 2, the upper end of the jack 5 abuts against the PC track beam 1, and the PC track beam 1 is jacked by about 1cm, so that the PC track beam can move in the transverse bridge direction; then, adjusting the transverse bridge position of the PC track beam through an adjusting screw 3 of the linear adjusting tool; when the transverse bridge position of the PC track beam meets the precision requirement, the adjusting screw 3 is screwed down, and the transverse bridge position of the PC track beam is fixed;
thirdly, adjusting the height of the PC track beam;
referring to fig. 3, after the transverse bridge position of the PC track beam 1 is determined, the three-dimensional coordinate system 8 is used to actually measure the measuring point and control point data of the PC track beam 1, and the transverse bridge position of the PC track beam 1 is accurately adjusted according to the measured control point data: meanwhile, the jack 5 and the slope adjusting block 6 arranged between the embedded support member 22 of the bent cap 2 and the in-beam support member 12 of the PC track beam 1 are used for accurately adjusting the elevation of the PC track beam 1; after the elevation fine adjustment, rechecking the three-dimensional coordinates of the measuring points by using the three-dimensional coordinate instrument 8 again, and repeatedly adjusting by using a linear adjusting tool until the installation precision of the PC track beam meets the design requirement;
fourthly, locking the PC track beam;
referring to fig. 4, after the elevation of the PC track beam 1 is finely adjusted, the pre-embedded support member 22 of the bent cap 1, the slope adjusting block 6 and the beam inner support member 12 of the PC track beam 1 are welded and fixed, and the PC track beam is locked;
fifthly, retesting the PC track beam;
referring to fig. 5, after the PC track beam 1 is locked for two hours, the three-dimensional coordinate system 8 is used to retest the data of the measuring points and the control points of the PC track beam, and if there is a deviation, the data is adjusted by using the linear adjusting tool until the design requirements are met.
The linear adjusting tool comprises an adjusting screw rod 3, a track beam screw rod 11, a cover beam screw rod 21, a jack 5 and a slope adjusting block 6.
Claims (2)
1. A construction method for adjusting the linear shape of a continuous rigid frame PC track beam is characterized in that after the continuous rigid frame PC track beam is erected, the horizontal, longitudinal and vertical positions of the PC track beam are adjusted by using a linear adjusting tool, and the linear adjusting comprises the following steps:
firstly, a PC track beam falls and is temporarily fixed;
when the PC track beam (1) falls, the linear adjusting tool is used for ensuring that the PC track beam (1) falls vertically, so that overturning is avoided, and meanwhile, the transverse bridge position of the track beam is basically determined; after the track beam falls, one end of an adjusting screw rod (3) of the linear adjusting tool is fixedly connected to a bent cap screw rod (21) at the upper end of a bent cap (2); the other end of the adjusting screw rod (3) is fixedly connected to a track beam screw rod (11) on the side surface of the PC track beam (1) to temporarily lock the PC track beam;
secondly, adjusting the plane of the PC track beam;
after the PC track beam (1) falls, firstly, a jack (5) in a linear adjusting tool is installed on an adjusting support (23) of a cover beam (2), the upper end of the jack (5) props against the PC track beam (1), and the PC track beam (1) is jacked by about 1 cm; then, adjusting the transverse bridge position of the PC track beam through an adjusting screw (3) of the linear adjusting tool; when the transverse bridge position of the PC track beam meets the precision requirement, the adjusting screw (3) is screwed down, and the transverse bridge position of the PC track beam is fixed;
thirdly, adjusting the height of the PC track beam;
after the transverse bridge direction position of the PC track beam (1) is determined, actually measuring the measuring point and control point data of the PC track beam (1) by using a three-dimensional coordinate instrument (8), and accurately adjusting the transverse bridge direction of the PC track beam (1) according to the measured control point data: meanwhile, a jack (5) and a slope adjusting block (6) arranged between an embedded supporting member (22) of the cover beam (2) and an in-beam supporting member (12) of the PC track beam (1) are utilized to accurately adjust the elevation of the PC track beam (1); after the elevation is finely adjusted, rechecking the three-dimensional coordinates of the measuring points by using a three-dimensional coordinate instrument (8), and repeatedly adjusting by using a linear adjusting tool until the installation precision of the PC track beam meets the design requirement;
fourthly, locking the PC track beam;
after the elevation of the PC track beam (1) is finely adjusted, welding and fixing the pre-embedded supporting member (22) of the bent cap (1), the slope adjusting block (6) and the beam inner supporting member (12) of the PC track beam (1) to lock the PC track beam;
fifthly, retesting the PC track beam;
after the PC track beam (1) is locked for two hours, the measuring point and control point data of the PC track beam are retested by a three-dimensional coordinate instrument (8), if deviation exists, the data are adjusted by a linear adjusting tool until the design requirements are met.
2. The continuous rigid frame PC track beam line shape adjusting construction method according to claim 1, characterized in that: the linear adjusting tool comprises an adjusting screw rod (3), a track beam screw rod (11), a bent cap screw rod (21), a jack (5) and a slope adjusting block (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010391308.9A CN111501438A (en) | 2020-05-11 | 2020-05-11 | Continuous rigid frame PC track beam line shape adjusting construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010391308.9A CN111501438A (en) | 2020-05-11 | 2020-05-11 | Continuous rigid frame PC track beam line shape adjusting construction method |
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| Publication Number | Publication Date |
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| CN111501438A true CN111501438A (en) | 2020-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010391308.9A Pending CN111501438A (en) | 2020-05-11 | 2020-05-11 | Continuous rigid frame PC track beam line shape adjusting construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921718A (en) * | 2021-01-28 | 2021-06-08 | 柳州煜乾机械装备股份公司 | Continuous jacking and mounting device for light rail track beam and using method thereof |
| CN113026536A (en) * | 2021-04-01 | 2021-06-25 | 中铁工程设计咨询集团有限公司 | Straddle type single-track continuous steel structure PC track beam adjusting device and adjusting method thereof |
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| CN113026536A (en) * | 2021-04-01 | 2021-06-25 | 中铁工程设计咨询集团有限公司 | Straddle type single-track continuous steel structure PC track beam adjusting device and adjusting method thereof |
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Application publication date: 20200807 |