CN103485242B - The installation leveling method of the short floating plate of floating ballast bed middle prefabricated - Google Patents
The installation leveling method of the short floating plate of floating ballast bed middle prefabricated Download PDFInfo
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Abstract
The invention belongs to field of track traffic, especially relate to a kind of installation leveling method of floating ballast bed middle floating plate, be specially the installation leveling method of the short floating plate of floating ballast bed middle prefabricated.The method is simple to operate, engineering examination paving result shows, do not need in installation process repeatedly to heighten leveling to the short floating plate of prefabricated, substantially can realize disposablely heightening leveling, fast very convenient, which overcome the technical bottleneck of existing method of operating, be conducive to improving speed of application further, meet the requirement of construction period, it greatly improves the applicability of steel spring floating slab road bed technology, market application foreground is very wide.
Description
Technical field
The invention belongs to field of track traffic, especially relate to a kind of installation leveling method of floating ballast bed middle floating plate, be specially the installation leveling method of the short floating plate of floating ballast bed middle prefabricated.
Background technology
Vibration & noise is influence surface the most a kind of public hazards that people generally acknowledge, is also track traffic in recent years development one of a facing difficult problem urgently to be resolved hurrily.In the noise reduction technology of existing track traffic, practical application is the most successfully component livitation, typically floating ballast bed technology, its vibration isolation efficiency is high, stable work in work, become common recognition in the industry, the such as patent No. is built-in type floating track bed structure disclosed in the Chinese patent of ZL200410035441.1.But existing floating ballast bed construction period is general longer, and standard floating plate length is 25m, and the speed of all carrying out the earliest constructing in tunnel can only realize average each working group and complete 5m every day; Then earthing, Shen, Shanghai Inland Steel and Qingdao every and solid company develops precast reinforced cage construction technology jointly, namely after the good reinforcing cage of the first colligation in ground, lifting enters the construction method of carrying out filling concrete in tunnel again, and the job schedule of each working group every day is brought up to about 30m.Because reinforcing cage size is larger, often need when transporting in tunnel to offer special passage on tunnel, very inconvenient, in addition, although reinforcing cage construction method significantly improves construction speed, but still the requirement of engineering construction duration can not be met well, many subway vibration isolation locations yield because the duration cannot meet and use floating ballast bed vibration isolation technique, cause the hidden danger vibrated and disturb residents.For addressing this problem, and the long novel floating ballast bed structure being no more than 8 meters of a kind of floating plate plate is developed every the technician of solid company in Shen, Shanghai earthing Inland Steel and Qingdao, concrete if application number is for described in the Chinese patent of 201220091895.0.This novel floating ballast bed structure, because floating plate plate is long shorter, can transport in tunnel easily, therefore floating plate can carry out prefabricated suitability for industrialized production on ground, so also referred to as the short floating plate of prefabricated, to carry out assembling construction in short for prefabricated floating plate again handling to tunnel, greatly can improve speed of application, the quality of floating plate also more easily ensures.But the plate due to the short floating plate of prefabricated is long shorter, and effect is stuck up in turning over of producing when entering from plate body one end to prevent vehicle, except arranging except Elastic Isolator in plate body, is also provided with plate end isolation mounting between the short floating plate of contiguous prefabricated formula.For the sake of security, the vertical stiffness of single plate end isolation mounting is greater than the vertical stiffness of other the single Elastic Isolators arranged in the short floating plate of prefabricated usually, find in test, the difference of this vertical stiffness, influence each other, add the objective reality of the various errors such as substrate construction error, when causing the short floating plate of prefabricated to carry out jacking and leveling, traditional approach is adopted height adjusting cushion plate to be set respectively on plate end isolation mounting and Elastic Isolator by theoretical design load and to heighten pad, often need repeatedly to heighten to plate end isolation mounting and Elastic Isolator the design elevation requirement that leveling could meet railway roadbed, therefore have impact on the progress of whole construction to a certain extent.
How to solve the problem that the short floating plate of prefabricated installs leveling length consuming time, thus realize the final purpose improving speed of application further, become a difficult problem in the industry for this technology further genralrlization of restriction application.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, the installation leveling method of the short floating plate of a kind of simple, quick, maneuverable floating ballast bed middle prefabricated is provided.
The installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of the present invention is achieved in that and it is characterized in that, when Elastic Isolator common support built-in during the short floating plate of prefabricated is by plate end isolation mounting and plate body, comprising the steps:
(1) the short floating plate of prefabricated identified according to ruling in railway roadbed basis and the plan-position of plate end isolation mounting, plate end isolation mounting is placed in precalculated position, utilize hoisting transportation equipment to be placed on plate end isolation mounting short for pre-processed prefabricated floating plate again, adjust the plan-position of the short floating plate of prefabricated;
(2) actual height of plate body upper surface relative to disjunction mark of laying a railway track of respective panels end isolation mounting position, prefabricated short floating plate end is measured respectively, the design elevation of contrast railway roadbed, calculate difference between the two, utilize this difference to deduct again thickness that namely comprehensive compensative level amount obtains height adjusting cushion plate needed for each plate end isolation mounting;
(3) short for prefabricated floating plate again sling or utilized jack stand, each plate end isolation mounting is placed the height adjusting cushion plate of respective thickness, completing the first jacking leveling of the short floating plate of prefabricated;
(4) built-in Elastic Isolator is put in the joint sheeve be fixedly installed in the short floating plate of prefabricated, according to the gross mass of the short floating plate of prefabricated, the quantity of plate end isolation mounting, the quantity of Elastic Isolator, the vertical stiffness of plate end isolation mounting and the vertical stiffness of Elastic Isolator, pre-determine the single static determinacy load of theory that each Elastic Isolator is born, using this theoretical single static determinacy load value as adjustment load, utilize hydraulic pump drive jack on Elastic Isolator, apply the adjustment load of identical numerical value, the thickness of pad is heightened needed for clearance height in Elastic Isolator upper surface and joint sheeve between support stop soffit is, what Elastic Isolator arranged respective thickness heightens pad, complete the second time jacking leveling of the short floating plate of this prefabricated,
(5) actual height of plate body upper surface relative to disjunction mark of laying a railway track of respective panels end isolation mounting position, prefabricated short floating plate end is again measured respectively, the design elevation of contrast railway roadbed, calculate difference between the two, the height adjusting cushion plate gross thickness between the short floating plate of prefabricated and correspondence position plate end isolation mounting is again adjusted according to gained height difference, until the short floating plate height of prefabricated meets design requirement, complete the accurate jacking leveling of the short floating plate of this prefabricated;
(6) according to above-mentioned steps, what complete all prefabricated floating plates in ballast bed structure one by one puts in place, first jacking leveling, second time jacking leveling and accurately jacking leveling, namely realizes the installation leveling of the short floating plate of floating ballast bed middle prefabricated.
Wherein, comprehensive compensative level method for determination of amount is, using the weight of the short floating plate of prefabricated as static load, calculate the average decrement had elastic component when the short floating plate of prefabricated is only provided support by all plate end isolation mountings, calculate the short floating plate of prefabricated again by the average decrement had elastic component when all plate end isolation mountings and built-in Elastic Isolator common support, comprehensive compensative level amount is the absolute value of the difference of secondary calculating averaging of income decrement.
In order to improve efficiency of construction further, when putting the short floating plate of prefabricated in step (1), can according to step (1) described method, place in proper order and adjust the plan-position of the short floating plate of polylith prefabricated, form at least one and workshop section is installed, again first jacking leveling, second time jacking leveling and accurately jacking leveling are implemented to the short floating plate of each block prefabricated installed in workshop section, thus realize the installation leveling of the short floating plate of floating ballast bed middle prefabricated.This form of construction work, is conducive to the continuity strengthening constructing operation, optimizes inter process flow process, and then effectively improve efficiency of construction.Its Specific construction mode of operation can be varied, such as, the one end of installing workshop section can be selected as initial, successively first jacking leveling, second time jacking leveling and accurately jacking leveling are implemented continuously to the short floating plate of each block prefabricated in installation workshop section, thus realize the installation leveling of the short floating plate of prefabricated in floating plate railway roadbed; Also the one end of installing workshop section can be selected as initial, successively to after in installation workshop section, the short floating plate of all prefabricateds implements first jacking leveling, successively second time jacking leveling is carried out to the short floating plate of all prefabricateds in installation workshop section again, and then successively accurate jacking leveling is carried out to the short floating plate of all prefabricateds in installation workshop section, thus realize the installation leveling of the short floating plate of prefabricated in floating plate railway roadbed; After first jacking leveling and second time jacking leveling can also being implemented to the short floating plate of all prefabricateds in installation workshop section, the short floating plate of prefabricated belonging to installation workshop section sets up rail, measure plate end isolation mounting corresponding position tread in the short floating plate of each prefabricated relatively to lay a railway track the actual height of disjunction mark, contrast Track desigh elevation, on plate end isolation mounting, height adjusting cushion plate is increased and decreased accordingly according to comparing result, until complete the accurate jacking leveling of installing the short floating plate of all prefabricateds in workshop section, realize the installation leveling of the short floating plate of prefabricated in floating plate railway roadbed.In addition, when tread relatively lay a railway track the actual height of disjunction mark and the difference of Track desigh elevation be less than 2mm time, railway rail pad can be utilized to carry out leveling, no longer adjust the height adjusting cushion plate thickness on respective panels end isolation mounting, this operating type effectively can reduce the short floating plate of jacking prefabricated and correct the number of times of the short floating plate plan-position of prefabricated, thus reduction difficulty of construction, improve efficiency of construction.
For the situation arranging shared plate end isolation mounting between the short floating plate of formula contiguous prefabricated in floating ballast bed structure, in first jacking leveling process, before measuring the actual height of the short floating plate upper surface of prefabricated corresponding to common plate end isolation mounting place relative to disjunction mark of laying a railway track, to need adjacent two pieces of short floating plates of prefabricated to be placed in all in advance on plate end isolation mounting and to adjust plan-position, and the abutting end of plate end isolation mounting to two pieces of short floating plates of prefabricated shared between adjacent two pieces of short floating plates of prefabricated is all remained valid bearing state, disjunction mark of relatively laying a railway track again is implemented to measure.In order to overcome the adverse effect that various early stage, construction error was brought, reduce and repeatedly adjust number of times, in step (1), hoisting transportation equipment is utilized by short for pre-processed prefabricated floating plate to be placed in after on plate end isolation mounting, can first confirm remains valid between each plate end isolation mounting and the short floating plate of prefabricated supports, realize in not short with prefabricated floating plate bottom surface the plate end isolation mounting that fully contacts pre-sets height adjusting cushion plate, until all realize between all plate end isolation mountings and the short floating plate of prefabricated effectively supporting, and then first jacking leveling is implemented to the short floating plate of prefabricated, second time jacking leveling and accurately jacking Levelling operation.By these above-mentioned measures, plate end isolation mounting stressed closer to work time actual forced status, therefore measurement result is more accurate, also directive significance is had more, determine that the thickness of required height adjusting cushion plate is more accurate accordingly and rationally can effectively reduce adjustment number of times, improve efficiency of construction.
In addition, in order to the adverse effect that the height error eliminating railway roadbed foundation construction is brought, in step (1), can on railway roadbed basis before board for putting end isolation mounting, first each center, plate end isolation mounting plan-position that measuring, railway roadbed basis rules identifies is relative to the actual height of disjunction mark of laying a railway track, the design height on contrast railway roadbed basis, calculate height difference, then board for putting end isolation mounting, part lower than design height is recompensed by the height adjusting cushion plate increasing respective thickness on plate end isolation mounting, to eliminate the adverse effect that railway roadbed foundation construction error causes, and then utilize hoisting transportation equipment to be placed in by prefabricated floating plate on plate end isolation mounting and adjust horizontal level.It should be noted that, for the ease of utilizing height adjusting cushion plate to compensate adjustment, in the railway roadbed foundation construction process in early stage, the height tolerance on railway roadbed basis only arranges lower limit, namely railway roadbed basis only allows the design height less than or equal to standard, should higher than the design height of standard.
In addition, it is to be noted, when utilizing jack pair Elastic Isolator to load in step (4), can take to utilize the Elastic Isolator arranged in the short floating plate plate body of jack pair prefabricated to carry out one by one loading and arranging the mode of operation heightening pad; Also corresponding for each Elastic Isolator in prefabricated short floating plate plate body a jack can be set, utilize compression pump to drive each Elastic Isolator in the short floating plate of all jack pair prefabricateds to apply respectively to adjust load simultaneously, then arrange on Elastic Isolator and heighten pad, this adjustment mode, the stressing conditions of each Elastic Isolator is closer to the duty of the best, precision is higher, better effects if, can significantly improve efficiency of construction.In general, the actual adjustment load that each Elastic Isolator of jack pair applies is 0.9 ~ 1.1 times of theoretical single static determinacy load value, this is because, for operating modes such as curved sections, Elastic Isolator stressed different that inside and outside track, both sides are arranged, so the adjustment load applied also can difference to some extent.
The present invention the form of Elastic Isolator that is suitable for can be varied, be specifically as follows steel spring vibration isolator, rubber shock absorber, rubber-metal composite vibration isolator or air cushion shock absorber.
The installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of the present invention, simple to operate, engineering examination paving result shows, does not need repeatedly to heighten leveling to the short floating plate of prefabricated, substantially can realize disposablely heightening leveling in installation process, fast very convenient, which overcome the technical bottleneck of existing method of operating, be conducive to improving speed of application further, meet the requirement of construction period, it greatly improves the applicability of steel spring floating slab road bed technology, market application foreground is very wide.
Accompanying drawing explanation
Fig. 1 is one of floating ballast bed structural representation.
Fig. 2 is the A-A sectional view in Fig. 1.
Fig. 3 be before first jacking leveling the short floating plate of prefabricated and plate end isolation mounting coordinate one of schematic diagram.
Fig. 4 be through first jacking leveling the short floating plate of prefabricated and plate end isolation mounting coordinate one of schematic diagram.
Fig. 5 be after second time jacking leveling the short floating plate of prefabricated and plate end isolation mounting and Elastic Isolator coordinate one of schematic diagram.
Fig. 6 is floating ballast bed structural representation two.
Fig. 7 is the B-B sectional view in Fig. 6.
Fig. 8 be before first jacking leveling the short floating plate of prefabricated and plate end isolation mounting coordinate schematic diagram two.
Fig. 9 be through first jacking leveling the short floating plate of prefabricated and plate end isolation mounting coordinate schematic diagram two.
Figure 10 be after second time jacking leveling the short floating plate of prefabricated and plate end isolation mounting and Elastic Isolator coordinate schematic diagram two.
Detailed description of the invention
Embodiment one
Below for short floating plate of block prefabricated every in floating ballast bed by four plate end isolation mountings and four built-in Elastic Isolator common support, the operating process of the installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of the present invention is illustrated.Understand the inventive method for convenience, first involved floating ballast bed basic structure is described.Described floating ballast bed typical structure as shown in Figures 1 and 2, for the short floating plate 2 of prefabricated, it is by four plate end isolation mountings 4 and four built-in Elastic Isolator 8 common support, depart from surface, basis 6, Elastic Isolator 8 is placed in the joint sheeve 5 that is fixedly installed in the short floating plate 2 of prefabricated, in addition, be provided with between support stop 10 in Elastic Isolator 8 end face and joint sheeve 5 and heighten pad 9, between plate end isolation mounting 4 and the short floating plate 2 of prefabricated, height adjusting cushion plate 7 is set, in order to ensure the short floating plate of prefabricated smooth transition load in the course of the work, cooperative bearing, shear hinge 11 is also provided with between the short floating plate of contiguous prefabricated formula, the each several part that shear hinge 11 is positioned on the short floating plate of contiguous prefabricated formula carries out leveling by backing plate 12, align position each other.The track structures such as rail, fastener and sleeper are arranged on the short floating plate of prefabricated, are in this case convenient to see clearly other structures, are not specifically illustrated by track structure in the drawings, hereby illustrate.
Below for the short floating plate 2 of prefabricated, illustrate the installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of the present invention shown in Fig. 1 and Fig. 2, specific operation process is as follows:
(1) plan-position of the short floating plate 2 of the prefabricated identified according to ruling in railway roadbed basis 6 and four plate end isolation mountings 4, plate end isolation mounting 4 is placed in precalculated position respectively, hoisting transportation equipment is utilized by short for pre-processed prefabricated floating plate 2 to be placed on plate end isolation mounting 4 again, adjust the plan-position of the short floating plate 2 of prefabricated, specifically as shown in Figure 3;
(2) actual height of plate body upper surface relative to disjunction mark of laying a railway track of respective panels end isolation mounting 4 position, prefabricated short floating plate 2 end is measured respectively, the design elevation of contrast railway roadbed, calculate difference between the two, utilize this difference to deduct again thickness that namely comprehensive compensative level amount obtains height adjusting cushion plate 7 needed for each plate end isolation mounting 4;
(3) again sling or utilize jack stand by short for prefabricated floating plate 2, each plate end isolation mounting 4 is placed the height adjusting cushion plate 7 of respective thickness, complete the first jacking leveling of the short floating plate of prefabricated 2, the state after first jacking leveling as shown in Figure 4;
(4) built-in Elastic Isolator 8 is put into respectively in four joint sheeves 5 be fixedly installed in the short floating plate of prefabricated, according to the gross mass of the short floating plate 2 of prefabricated, the quantity of plate end isolation mounting 4, the quantity of Elastic Isolator 8, the vertical stiffness of plate end isolation mounting 4 and the vertical stiffness of Elastic Isolator 8, pre-determine the single static determinacy load of theory that each Elastic Isolator 8 is born, using this theoretical single static determinacy load value as adjustment load, utilize hydraulic pump drive jack on Elastic Isolator 8, apply the adjustment load of identical numerical value one by one, Elastic Isolator 8 is compressed, the thickness of pad 9 is heightened needed for clearance height in Elastic Isolator 8 upper surface and joint sheeve 5 between support stop 10 soffit is, what Elastic Isolator 8 arranged respective thickness heightens pad 9, utilize and heighten pad 9 and occupy gap in Elastic Isolator 8 upper surface and joint sheeve 5 between support stop 10 soffit, complete the second time jacking leveling of the short floating plate of this prefabricated, concrete state as shown in Figure 5,
(5) actual height of plate body upper surface relative to disjunction mark of laying a railway track of respective panels end isolation mounting 4 position, prefabricated short floating plate 2 end is again measured respectively, the design elevation of contrast railway roadbed, calculate difference between the two, the height adjusting cushion plate gross thickness between the short floating plate of prefabricated and correspondence position plate end isolation mounting is again adjusted according to gained height difference, until the short floating plate height of prefabricated meets design requirement, complete the accurate jacking leveling of the short floating plate of this prefabricated;
(6) according to above-mentioned steps, what complete other all prefabricated floating plates in the short floating plate of prefabricated 3 and ballast bed structure one by one puts in place, first jacking leveling, second time jacking leveling and accurately jacking leveling, namely realize the installation leveling of the short floating plate of floating ballast bed middle prefabricated, its state as shown in Figure 2.
Wherein, comprehensive compensative level method for determination of amount is, using the weight of the short floating plate 2 of prefabricated as static load, calculate the average decrement had elastic component when the short floating plate of prefabricated 2 is only provided support by four plate end isolation mountings 4, calculate the short floating plate of prefabricated 2 again by the average decrement had elastic component when four plate end isolation mountings and four Elastic Isolator common support, comprehensive compensative level amount is the absolute value of the difference of secondary calculating averaging of income decrement.The specific algorithm of comprehensive compensative level amount and adjustment load can refer to following formula, for convenience of description, first following parameters is defined as follows:
M---the gross mass of the short floating plate of prefabricated;
G---acceleration of gravity;
N
1---the short floating plate correspondence of every block prefabricated arranges the total quantity of plate end isolation mounting;
N
2---the short floating plate correspondence of every block prefabricated arranges the total quantity of Elastic Isolator;
K
1---the vertical global stiffness of single plate end isolation mounting;
K
2---the vertical global stiffness of single Elastic Isolator;
The design elevation value of H---railway roadbed;
H---measure the actual height of plate body upper surface relative to disjunction mark of laying a railway track of the respective panels end isolation mounting position, end of the short floating plate of prefabricated;
H
1---the weight of the short floating plate of prefabricated as dead weight on all plate end isolation mountings and Elastic Isolator time, the average decrement of the theory had elastic component obtained;
H
2---when the weight of the short floating plate of prefabricated only acts on all plate end isolation mountings as static load, the average decrement of the theory had elastic component obtained;
S
1---the thickness of height adjusting cushion plate needed for plate end isolation mounting;
T---comprehensive compensative level amount;
The single static determinacy load of theory that F---Elastic Isolator is born, namely adjusts load.
Above-mentioned parameter definition is applicable to all embodiments of the present invention, in this special instruction.According to the definition of above-mentioned parameter and the concrete technical scheme of this example, following formula can be derived:
H
1=Mg/（n
1*K
1+n
2*K
2）①
H
2=Mg/（n
1*K
1）②
t=H
2-H
1③
S
1=（H-h）-t④
F=K
2*H
1⑤
Due to above-mentioned parameter or can obtain in the design stage, or can draw by instrument measurements such as level gauges at the scene, all can obtain numerical value accurately, therefore by formula 1., formula 2., formula 3., formula 4. with formula 5., just can draw the thickness S of required height adjusting cushion plate 7 on plate end isolation mounting 4 in step (2) very soon
1with adjustment load required on step (4) Elastic vibration isolator 8, and then the jacking leveling to the short floating plate of prefabricated can be realized fast.In practical operation, can by the Microsoft Excel in computer, setup algorithm formula, inputs in advance by data with existing, after being listed in by data measured, operates more simple and efficient after in-site measurement again.
This example is only supported for example with short floating plate of block prefabricated every in floating ballast bed by four plate end isolation mountings and four internal elastic vibration isolators simultaneously and is described, during practical application, the difference long according to plate, two, six, eight even more Elastic Isolators also can be set in the short floating plate of prefabricated, the installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of the present invention can be applicable to.When the quantity of Elastic Isolator changes, only corresponding comprehensive compensative level amount need be calculated with reference to above-mentioned comprehensive compensative level method for determination of amount.In engineer applied, for saving time, can after floating ballast bed design completes, according to plate end isolation mounting and the Elastic Isolator configuration of the short floating plate of each block prefabricated, precompute the comprehensive compensative level amount that each plate end isolation mounting is corresponding, contrast the short floating plate of corresponding prefabricated at the scene and directly apply.
After realizing the installation leveling of the short floating plate of floating ballast bed middle prefabricated, then assemble the track structures such as shear hinge, rail, fastener and sleeper on the short floating plate of prefabricated, form complete floating ballast bed structure as depicted in figs. 1 and 2.Certainly different according to operating habit, also the elements such as rail, fastener, sleeper or shear hinge can be assembled in advance on the short floating plate of prefabricated, but before unrealized installation leveling finally, the retaining element such as shear hinge, fastener must not be locked, in order to avoid change the normal allocation of the short floating plate static load of prefabricated on flexible member, cause measure error, levelling effect is installed in impact.
The present invention the form of Elastic Isolator that is suitable for can be varied, be specifically as follows steel spring vibration isolator, rubber shock absorber, rubber-metal composite vibration isolator or air cushion shock absorber.
The installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of the present invention, simple to operate, engineering examination paving result shows, does not need repeatedly to heighten leveling to the short floating plate of prefabricated, substantially can realize disposablely heightening leveling in installation process, fast very convenient, which overcome the technical bottleneck of existing method of operating, be conducive to improving speed of application further, meet the requirement of construction period, it greatly improves the applicability of steel spring floating slab road bed technology, market application foreground is very wide.
Embodiment two
Still for floating ballast bed described in embodiment one, the short floating plate of every block prefabricated is by four plate end isolation mountings and four built-in Elastic Isolator common support, different from embodiment one, in the installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of this routine described the present invention, when putting the short floating plate of prefabricated in step (1), according to step (1) described method, place in proper order and adjust the plan-position of the short floating plate of polylith prefabricated, form at least one and workshop section is installed, again first jacking leveling is implemented to the short floating plate of each block prefabricated installed in workshop section, second time jacking leveling and accurately jacking leveling, thus realize the installation leveling of the short floating plate of floating ballast bed middle prefabricated.
In the installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of the present invention described in this example, the first jacking leveling of the short floating plate of prefabricated, second time jacking leveling and accurately jacking Levelling operation is identical with the method described in embodiment one, in this no longer repeated description.
Compared with embodiment one, the installation leveling method of the short floating plate of floating ballast bed middle prefabricated described in this example, is conducive to the continuity strengthening constructing operation, optimizes inter process flow process, and then effectively improve efficiency of construction.
Embodiment three
Floating ballast bed still for structure described in embodiment one, based on the know-why of embodiment one and embodiment two, the installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of the present invention can also do following differentiation, and its specific operation process is as follows:
(1) the short floating plate of prefabricated identified according to ruling in railway roadbed basis and the plan-position of four plate end isolation mountings, plate end isolation mounting is placed in precalculated position respectively, hoisting transportation equipment is utilized by short for pre-processed prefabricated floating plate to be placed on plate end isolation mounting again, adjust the plan-position of the short floating plate of prefabricated, according to the method described above, place in proper order and adjust the plan-position of the short floating plate of polylith prefabricated, forming at least one and workshop section is installed;
(2) select the one end of installing workshop section as initial, measure the actual height of plate body upper surface relative to disjunction mark of laying a railway track of respective panels end isolation mounting position, first piece of prefabricated short floating plate end respectively, the design elevation of contrast railway roadbed, calculate difference between the two, utilize this difference to deduct again thickness that namely comprehensive compensative level amount obtains height adjusting cushion plate needed for each plate end isolation mounting;
(3) short for prefabricated floating plate again sling or utilized jack stand, each plate end isolation mounting is placed the height adjusting cushion plate of respective thickness, completing the first jacking leveling of one piece of short floating plate of prefabricated;
(4) according to the first jacking leveling step of the short floating plate of above-mentioned prefabricated, the first jacking leveling of installing the short floating plate of all prefabricateds in workshop section is completed successively;
(5) built-in Elastic Isolator is put into respectively in four joint sheeves be fixedly installed in the short floating plate of prefabricated, according to the gross mass of the short floating plate of prefabricated, the quantity of plate end isolation mounting, the quantity of Elastic Isolator, the vertical stiffness of plate end isolation mounting and the vertical stiffness of Elastic Isolator, pre-determine the single static determinacy load of theory that each Elastic Isolator is born, using this theoretical single static determinacy load value as adjustment load, utilize hydraulic pump drive jack on Elastic Isolator, apply the adjustment load of identical numerical value one by one, Elastic Isolator is compressed, the thickness of pad is heightened needed for clearance height in Elastic Isolator upper surface and joint sheeve between support stop soffit is, what Elastic Isolator arranged respective thickness heightens pad, utilize and heighten pad and occupy gap in Elastic Isolator upper surface and joint sheeve between support stop soffit, complete the second time jacking leveling of one piece of short floating plate of prefabricated,
(6) according to the second time jacking leveling step of the short floating plate of above-mentioned prefabricated, the second time jacking leveling of installing the short floating plate of all prefabricateds in workshop section is completed successively;
(7) actual height of plate body upper surface relative to disjunction mark of laying a railway track of respective panels end isolation mounting position, prefabricated short floating plate end is again measured respectively, the design elevation of contrast railway roadbed, calculate difference between the two, the height adjusting cushion plate gross thickness between the short floating plate of prefabricated and correspondence position plate end isolation mounting is again adjusted according to gained height difference, until the short floating plate height of prefabricated meets design requirement, complete the accurate jacking leveling of one piece of short floating plate of prefabricated;
(8) according to the accurate jacking leveling step of the short floating plate of above-mentioned prefabricated, the accurate jacking leveling of installing the short floating plate of all prefabricateds in workshop section is completed successively;
(9) according to above-mentioned steps, complete ballast bed structure other prefabricated floating plate in workshop sections is installed put in place, first jacking leveling, second time jacking leveling and accurately jacking leveling, namely realize the installation leveling of the short floating plate of floating ballast bed middle prefabricated.
The installation leveling method of the short floating plate of floating ballast bed middle prefabricated described in this example, the continuity of constructing operation is better, is conducive to optimizing inter process flow process, and then effectively improves efficiency of construction.
Embodiment four
Compared with embodiment three, the kind of the difference of the installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of this routine described the present invention is, according to step (1) in embodiment three to step (6) described method, after completing the second time jacking leveling of installing the short floating plate of all prefabricateds in workshop section successively, operate as follows again: on the short floating plate of prefabricated belonging to installation workshop section, set up rail, measure plate end isolation mounting corresponding position tread in prefabricated short floating plate relatively to lay a railway track the actual height of disjunction mark, contrast Track desigh elevation, on plate end isolation mounting, height adjusting cushion plate is increased and decreased accordingly according to comparing result, complete the accurate jacking leveling of one piece of short floating plate of prefabricated, according to the method for operating of above-mentioned accurate jacking leveling, complete the accurate jacking leveling of installing the short floating plate of all prefabricateds in workshop section successively, realize the installation leveling of the short floating plate of prefabricated in floating plate railway roadbed.
Method described in this example, while the installation leveling realizing the short floating plate of prefabricated in floating plate railway roadbed, also achieves the adjustment of rising Rail, decreases adjustment operation, improve efficiency of construction.
It is to be noted especially, as a kind of existing conventional application mode, flexible railway rail pad is provided with between rail and fastener, in accurate jacking leveling process, when the tread recorded relatively lay a railway track the actual height of disjunction mark and the difference of Track desigh elevation be less than 2mm time, also the thickness controlling railway rail pad can be utilized to carry out leveling, no longer adjust the height adjusting cushion plate thickness on respective panels end isolation mounting, this operating type effectively can reduce the short floating plate of jacking prefabricated and correct the number of times of the short floating plate plan-position of prefabricated, thus reduction difficulty of construction, improve efficiency of construction, also among the protection domain of application claims.
Embodiment five
The floating ballast bed structure of typical case as shown in Figure 6, Figure 7, be with the difference of floating ballast bed structure shown in Fig. 1 and Fig. 2 in embodiment one, in floating ballast bed structure, shared plate end isolation mounting is set between the short floating plate of contiguous prefabricated formula, wherein plate end isolation mounting 20 carries the abutting end of the short floating plate of prefabricated 1 and the short floating plate 2 of prefabricated simultaneously, and plate end isolation mounting 21 carries the abutting end of the short floating plate of prefabricated 2 and the short floating plate 3 of prefabricated simultaneously.It is pointed out that and distinguish plate end isolation mounting 20 and plate end isolation mounting 21 only for convenience of description at this, in actual applications, plate end isolation mounting 20 and plate end isolation mounting 21 also may be identical.
Based on know-why of the present invention, for the situation arranging shared plate end isolation mounting between the short floating plate of formula contiguous prefabricated in floating ballast bed structure, implement in first jacking leveling process, before measuring the actual height of the short floating plate upper surface of prefabricated corresponding to common plate end isolation mounting place relative to disjunction mark of laying a railway track, to need adjacent two pieces of short floating plates of prefabricated to be placed in all in advance on plate end isolation mounting and to adjust plan-position, and the abutting end of plate end isolation mounting to two pieces of short floating plates of prefabricated shared between adjacent two pieces of short floating plates of prefabricated is all remained valid bearing state, disjunction mark of relatively laying a railway track again is implemented to measure.For the short floating plate of prefabricated 2, the installation leveling method of the short floating plate of floating ballast bed middle prefabricated this example described is specifically described below:
(1) the short floating plate of prefabricated identified according to ruling in railway roadbed basis 6 and the plan-position of plate end isolation mounting, to the short floating plate 1 of major general's prefabricated, the plate end isolation mounting of 2 and 3 correspondences is placed in precalculated position respectively, again by short for pre-processed prefabricated floating plate 1, 2 and 3 utilize hoisting transportation equipment to be placed on plate end isolation mounting respectively, adjust the short floating plate 1 of prefabricated, the plan-position of 2 and 3, specifically as shown in Figure 8, wherein plate end isolation mounting 20 effectively carries the abutting end of the short floating plate of prefabricated 1 and the short floating plate 2 of prefabricated, plate end isolation mounting 21 effectively carries the abutting end of the short floating plate of prefabricated 2 and the short floating plate 3 of prefabricated,
(2) actual height of plate body upper surface relative to disjunction mark of laying a railway track of the corresponding each plate end isolation mounting 20 in prefabricated short floating plate 2 end and each plate end isolation mounting 21 position is measured respectively, the design elevation of contrast railway roadbed, calculate difference between the two, utilize this difference to deduct again thickness that namely comprehensive compensative level amount obtains height adjusting cushion plate 7 needed for each plate end isolation mounting 20 and 21;
(3) short for prefabricated floating plate 2 is again sling or utilized jack stand, the height adjusting cushion plate 7 of respective thickness is placed between the short floating plate of prefabricated 2 and each plate end isolation mounting 20 and 21, complete the first jacking leveling of the short floating plate of prefabricated 2, the state after first jacking leveling as shown in Figure 9;
(4) built-in Elastic Isolator 8 is put into respectively in four joint sheeves 5 be fixedly installed in the short floating plate of prefabricated 2, according to the gross mass of the short floating plate 2 of prefabricated, the quantity of plate end isolation mounting 20 and 21, the quantity of Elastic Isolator 8, the vertical stiffness of plate end isolation mounting 20 and 21, the vertical stiffness of Elastic Isolator 8, pre-determine the single static determinacy load of theory that each Elastic Isolator 8 is born, using this theoretical single static determinacy load value as adjustment load, utilize hydraulic pump drive jack on Elastic Isolator 8, apply the adjustment load of identical numerical value one by one, Elastic Isolator 8 is compressed, the thickness of pad 9 is heightened needed for clearance height in Elastic Isolator 8 upper surface and joint sheeve 5 between support stop 10 soffit is, what Elastic Isolator 8 arranged respective thickness heightens pad 9, utilize and heighten pad 9 and occupy gap in Elastic Isolator 8 upper surface and joint sheeve 5 between support stop 10 soffit, complete the second time jacking leveling of the short floating plate 2 of this prefabricated, concrete state as shown in Figure 10,
(5) actual height of plate body upper surface relative to disjunction mark of laying a railway track of respective panels end isolation mounting 20 and 21 position, prefabricated short floating plate 2 end is again measured respectively, the design elevation of contrast railway roadbed, calculate difference between the two, the height adjusting cushion plate gross thickness between the short floating plate of prefabricated and correspondence position plate end isolation mounting is again adjusted according to gained height difference, until the height of the short floating plate 2 of prefabricated meets design requirement, complete the accurate jacking leveling of the short floating plate of this prefabricated;
(6) according to the method described above, what complete the short floating plate of other all prefabricateds in the short floating plate of prefabricated 1, the short floating plate of prefabricated 3 and ballast bed structure one by one puts in place, first jacking leveling, second time jacking leveling and accurately jacking leveling, namely realizes the installation leveling of the short floating plate of floating ballast bed middle prefabricated.
It should be noted that, at present in engineer applied, support the plate end isolation mounting of adjacent two pieces of short floating plates of prefabricated simultaneously, its support force for the short floating plate of each block prefabricated is approximately uniform, therefore can be similar to and think that the vertical stiffness contribution of the corresponding every short floating plate of block prefabricated of each shared plate end isolation mounting is 1/2nd of the vertical global stiffness of plate end isolation mounting, note when calculating comprehensive compensative level amount and adjustment load.In addition, at the floating ballast bed position be connected with solid concrete roabed, prefabricated short floating plate with solid concrete roabed adjacent one end adjacent with solid concrete roabed can arrange independently plate end isolation mounting, when carrying out installation leveling to the short floating plate of this block prefabricated, by this routine described method and methods combining use described in can be implemented, there iing the method for common plate end isolation mounting side described in this example to carry out installation leveling, utilizing the method described in embodiment one to carry out installation leveling using the side of independent plate end isolation mounting.
In method described in this example, the short floating plate of prefabricated why requirement is provided with common plate end isolation mounting is implemented in first jacking leveling process, before measuring the actual height of the short floating plate upper surface of prefabricated corresponding to common plate end isolation mounting place relative to disjunction mark of laying a railway track, to need adjacent two pieces of short floating plates of prefabricated to be placed in all in advance on plate end isolation mounting and to adjust plan-position, and the abutting end of plate end isolation mounting to two pieces of short floating plates of prefabricated shared between adjacent two pieces of short floating plates of prefabricated is all remained valid bearing state, mainly want by these above-mentioned measures, make the stressed closer to actual forced status during static load of plate end isolation mounting, therefore measurement result is more accurate, also directive significance is had more, determine that the thickness of required height adjusting cushion plate is more accurate rationally accordingly, can effectively reduce adjustment number of times, improve efficiency of construction.
Certainly, according to the know-why of embodiment three, in installation jacking leveling method described in this example, at least one also can be set workshop section is installed, be initial to install the either end of workshop section again, successively first jacking leveling is implemented to the short floating plate of all prefabricateds installed in workshop section, and then implement second time jacking leveling successively, finally the short floating plate of all prefabricateds installed in workshop section implements accurate jacking leveling successively again, realize the installation jacking leveling of the short floating plate of floating ballast bed middle prefabricated, also same effect can be realized, all in the protection domain of application claims.
Embodiment six
The difference of method described in the installation leveling method of the short floating plate of the described floating ballast bed middle prefabricated of this example and embodiment five is: in step (1), hoisting transportation equipment is utilized by short for pre-processed prefabricated floating plate to be placed in after on plate end isolation mounting, first confirming remains valid between each plate end isolation mounting and the short floating plate of prefabricated supports, realize in not short with prefabricated floating plate bottom surface the plate end isolation mounting that fully contacts pre-sets height adjusting cushion plate, until all realize between all plate end isolation mountings and the short floating plate of prefabricated effectively supporting, and then according to the method described in embodiment five, first jacking leveling is implemented to the short floating plate of prefabricated, second time jacking leveling and accurately jacking Levelling operation, no longer repeated description is carried out at this.
Method described in this example, perfect further to institute's recording method in embodiment five, because railway roadbed basis exists the reasons such as construction error, when adjacent two pieces of short floating plates of prefabricated are placed on shared plate end isolation mounting, the situation that the plate end isolation mounting of respective location does not contact completely with the short floating plate of prefabricated may be there is, thus the accuracy of follow-up measurement is impacted, by the measure described in this example, can effectively eliminate this hidden danger, therefore measurement result is more accurate, also directive significance is had more, determine that the thickness of required height adjusting cushion plate is more accurate rationally accordingly, can effectively reduce adjustment number of times, improve efficiency of construction.
Embodiment seven
In order to the adverse effect that the height error eliminating railway roadbed foundation construction is brought, compared with method described in embodiment five, the installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of the present invention can also do following improvement:
In step (1), on railway roadbed basis before board for putting end isolation mounting, first each center, plate end isolation mounting plan-position that measuring, railway roadbed basis rules identifies is relative to the actual height of disjunction mark of laying a railway track, the design height on contrast railway roadbed basis, calculated height difference, then board for putting end isolation mounting, part lower than design height is recompensed by the height adjusting cushion plate increasing respective thickness on plate end isolation mounting, to eliminate the adverse effect that railway roadbed foundation construction error causes, and then utilize hoisting transportation equipment to be placed in by short for prefabricated floating plate on plate end isolation mounting and adjust plan-position, later step is identical with the description in embodiment five, no longer repeat at this.
It should be noted that, for the ease of utilizing height adjusting cushion plate to compensate adjustment, in the railway roadbed foundation construction process in early stage, the height tolerance on railway roadbed basis only arranges lower limit, namely railway roadbed basis only allows the design height less than or equal to standard, should higher than the design height of standard.
Embodiment eight
The installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of this routine described the present invention, be with the difference of method described in embodiment five, when utilizing jack pair Elastic Isolator to load in step (4), for each Elastic Isolator in prefabricated short floating plate plate body corresponding a jack is set, utilize compression pump to drive each Elastic Isolator in the short floating plate of all jack pair prefabricateds to apply respectively to adjust load simultaneously, then arrange on Elastic Isolator and heighten pad, utilize and heighten pad and occupy gap in Elastic Isolator upper surface and joint sheeve between support stop soffit, complete the second time jacking leveling of the short floating plate of this prefabricated.All the other methods of operating are identical with described in embodiment five, no longer repeat at this.
Installation leveling method described in this example, the all Elastic Isolators utilizing jack to make to arrange in the short floating plate of prefabricated are simultaneously stressed, the stressing conditions of each Elastic Isolator is closer to the static load duty of reality, its Adjustment precision is higher, better effects if, be conducive to minimizing to repeat to adjust number of times, significantly improve efficiency of construction.
Know-why of the present invention is equally also suitable for applying in other embodiments of the invention; and; based on know-why of the present invention; also all Elastic Isolators arranged in short for prefabricated floating plate can be divided into some groups; and then in units of group; utilize jack pair each Elastic Isolator often in group to load simultaneously and arrange and heighten pad; until complete the second time jacking leveling of the short floating plate of prefabricated; these technical schemes are all the simple extensions of the technology of the present invention principle, all in the protection domain of application claims.It should be noted that in addition, in practicing, the actual adjustment load that each Elastic Isolator of jack pair applies is 0.9 ~ 1.1 times of theoretical single static determinacy load value, this is because, for operating modes such as curved sections, Elastic Isolator stressed different that inside and outside track, both sides are arranged, so the adjustment load applied also can difference to some extent.This point is applicable to other embodiments of the present invention too.
The present invention the form of Elastic Isolator that is suitable for can be varied, be specifically as follows steel spring vibration isolator, rubber shock absorber, rubber-metal composite vibration isolator or air cushion shock absorber.
Be presented above the part exemplary embodiments of the installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of the present invention; object is the convenient method understanding the present invention better; it should not be considered as limitation of the present invention; technical scheme wherein in each embodiment also can cross-reference; as long as based on know-why of the present invention, all among the protection domain of application claims.
Claims (10)
1. an installation leveling method for the short floating plate of floating ballast bed middle prefabricated, is characterized in that, when Elastic Isolator common support built-in during the short floating plate of prefabricated is by plate end isolation mounting and plate body, comprising the steps:
(1) the short floating plate of prefabricated identified according to ruling in railway roadbed basis and the plan-position of plate end isolation mounting, plate end isolation mounting is placed in precalculated position, utilize hoisting transportation equipment to be placed on plate end isolation mounting short for pre-processed prefabricated floating plate again, adjust the plan-position of the short floating plate of prefabricated;
(2) actual height of plate body upper surface relative to disjunction mark of laying a railway track of respective panels end isolation mounting position, prefabricated short floating plate end is measured respectively, the design elevation of contrast railway roadbed, calculate difference between the two, utilize this difference to deduct again thickness that namely comprehensive compensative level amount obtains height adjusting cushion plate needed for each plate end isolation mounting;
(3) short for prefabricated floating plate again sling or utilized jack stand, each plate end isolation mounting is placed the height adjusting cushion plate of respective thickness, completing the first jacking leveling of the short floating plate of prefabricated;
(4) built-in Elastic Isolator is put in the joint sheeve be fixedly installed in the short floating plate of prefabricated, according to the gross mass of the short floating plate of prefabricated, the quantity of plate end isolation mounting, the quantity of Elastic Isolator, the vertical stiffness of plate end isolation mounting and the vertical stiffness of Elastic Isolator, pre-determine the single static determinacy load of theory that each Elastic Isolator is born, using this theoretical single static determinacy load value as adjustment load, utilize hydraulic pump drive jack on Elastic Isolator, apply the adjustment load of identical numerical value, the thickness of pad is heightened needed for clearance height in Elastic Isolator upper surface and joint sheeve between support stop soffit is, what Elastic Isolator arranged respective thickness heightens pad, complete the second time jacking leveling of the short floating plate of this prefabricated,
(5) actual height of plate body upper surface relative to disjunction mark of laying a railway track of respective panels end isolation mounting position, prefabricated short floating plate end is again measured respectively, the design elevation of contrast railway roadbed, calculate difference between the two, the height adjusting cushion plate gross thickness between the short floating plate of prefabricated and correspondence position plate end isolation mounting is again adjusted according to gained height difference, until the short floating plate height of prefabricated meets design requirement, complete the accurate jacking leveling of the short floating plate of this prefabricated;
(6) according to above-mentioned steps, what complete all prefabricated floating plates in ballast bed structure one by one puts in place, first jacking leveling, second time jacking leveling and accurately jacking leveling, namely realizes the installation leveling of the short floating plate of floating ballast bed middle prefabricated;
Comprehensive compensative level method for determination of amount is, using the weight of the short floating plate of prefabricated as static load, calculate the average decrement had elastic component when the short floating plate of prefabricated is only provided support by all plate end isolation mountings, calculate the short floating plate of prefabricated again by the average decrement had elastic component when all plate end isolation mountings and built-in Elastic Isolator common support, comprehensive compensative level amount is the absolute value of the difference of secondary calculating averaging of income decrement.
2. the installation leveling method of the short floating plate of floating ballast bed middle prefabricated according to claim 1, it is characterized in that according to step (1) described method, place in proper order and adjust the plan-position of the short floating plate of polylith prefabricated, form at least one and workshop section is installed, again first jacking leveling, second time jacking leveling and accurately jacking leveling are implemented to the short floating plate of each block prefabricated installed in workshop section, thus realize the installation leveling of the short floating plate of floating ballast bed middle prefabricated.
3. the installation leveling method of the short floating plate of floating ballast bed middle prefabricated according to claim 2, it is characterized in that selecting the one end of installing workshop section as initial, successively to after in installation workshop section, the short floating plate of all prefabricateds implements first jacking leveling, successively second time jacking leveling is carried out to the short floating plate of all prefabricateds in installation workshop section again, and then successively accurate jacking leveling is carried out to the short floating plate of all prefabricateds in installation workshop section, thus realize the installation leveling of the short floating plate of prefabricated in floating plate railway roadbed.
4. the installation leveling method of the short floating plate of floating ballast bed middle prefabricated according to claim 3, after it is characterized in that first jacking leveling and second time jacking leveling are implemented to the short floating plate of all prefabricateds in installation workshop section, the short floating plate of prefabricated belonging to installation workshop section sets up rail, measure plate end isolation mounting corresponding position tread in the short floating plate of each prefabricated relatively to lay a railway track the actual height of disjunction mark, contrast Track desigh elevation, on plate end isolation mounting, height adjusting cushion plate is increased and decreased accordingly according to comparing result, until complete the accurate jacking leveling of installing the short floating plate of all prefabricateds in workshop section, realize the installation leveling of the short floating plate of prefabricated in floating plate railway roadbed.
5. the installation leveling method of the short floating plate of floating ballast bed middle prefabricated according to claim 4, it is characterized in that when tread relatively lay a railway track the actual height of disjunction mark and the difference of Track desigh elevation be less than 2mm time, utilize railway rail pad to carry out leveling, no longer adjust the height adjusting cushion plate thickness on respective panels end isolation mounting.
6. the installation leveling method of the short floating plate of floating ballast bed middle prefabricated according to claim 1 or 2, when it is characterized in that arranging shared plate end isolation mounting when between the short floating plate of contiguous prefabricated formula, in first jacking leveling process, before measuring the actual height of the short floating plate upper surface of prefabricated corresponding to common plate end isolation mounting place relative to disjunction mark of laying a railway track, to need adjacent two pieces of short floating plates of prefabricated to be placed in all in advance on plate end isolation mounting and to adjust plan-position, and the abutting end of plate end isolation mounting to two pieces of short floating plates of prefabricated shared between adjacent two pieces of short floating plates of prefabricated is remained valid bearing state, disjunction mark of relatively laying a railway track again is implemented to measure.
7. the installation leveling method of the short floating plate of floating ballast bed middle prefabricated according to claim 1 or 2, it is characterized in that in step (1), hoisting transportation equipment is utilized by short for pre-processed prefabricated floating plate to be placed in after on plate end isolation mounting, first confirming remains valid between each plate end isolation mounting and the short floating plate of prefabricated supports, realize in not short with prefabricated floating plate bottom surface the plate end isolation mounting that fully contacts pre-sets height adjusting cushion plate, until all realize between all plate end isolation mountings and the short floating plate of prefabricated effectively supporting, and then first jacking leveling is implemented to the short floating plate of prefabricated, first time jacking leveling and accurately jacking Levelling operation.
8. the installation leveling method of the short floating plate of floating ballast bed middle prefabricated according to claim 1 or 2, it is characterized in that in step (1), on railway roadbed basis before board for putting end isolation mounting, first each center, plate end isolation mounting plan-position that measuring, railway roadbed basis rules identifies is relative to the actual height of disjunction mark of laying a railway track, the design height on contrast railway roadbed basis, calculate height difference, then board for putting end isolation mounting, part lower than design height is recompensed by the height adjusting cushion plate increasing respective thickness on plate end isolation mounting, to eliminate the adverse effect that railway roadbed foundation construction error causes, and then utilize hoisting transportation equipment to be placed in by prefabricated floating plate on plate end isolation mounting and adjust plan-position.
9. the installation leveling method of the short floating plate of floating ballast bed middle prefabricated according to claim 1, when it is characterized in that utilizing jack pair Elastic Isolator to load in step (4), what each Elastic Isolator was corresponding arranges a jack, utilizes compression pump to drive each Elastic Isolator in the short floating plate of all jack pair prefabricateds to apply respectively to adjust load simultaneously.
10. the installation leveling method of the short floating plate of floating ballast bed middle prefabricated according to claim 1 or 9, is characterized in that actual adjustment load that each Elastic Isolator of jack pair applies is 0.9 ~ 1.1 times of theoretical single static determinacy load value.
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