CN103485242A - Installation and leveling method of prefabricated short floating slab in floating track bed - Google Patents
Installation and leveling method of prefabricated short floating slab in floating track bed Download PDFInfo
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Abstract
The invention belongs to the field of track traffic, and relates to an installation and leveling method of a floating slab in a floating track bed, in particular to an installation and leveling method of a prefabricated short floating slab in the floating track bed. The installation and leveling method of the prefabricated short floating slab in the floating track bed is simple to operate. As proved by project trail laying, the prefabricated short floating slab does not need to be heightened or leveled repeatedly in the installation process, one time of heightening and leveling can be basically achieved, and the method is quite convenient and rapid to operate, overcomes the technical bottlenecks of existing operation methods, further improves construction speed, meets the requirements of construction cycles, and largely improves the technical applicability of a steel spring floating slab track bed, thereby enabling the prefabricated short floating slab to be quite wide in market application prospect.
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 and noise are influence surface that people are generally acknowledged the most a kind of public hazards, are also the difficult problems urgently to be resolved hurrily that track traffic in recent years development faces.In the noise reduction technology of existing track traffic, what practical application was the most successful is the member livitation, be typically floating ballast bed technology, its vibration isolation efficiency is high, stable work in work, become common recognition in the industry, the disclosed built-in type floating track bed structure of the Chinese patent that for example patent No. is ZL200410035441.1.But existing floating ballast bed construction period is generally longer, and standard floating plate length is 25m, the speed of all being constructed in tunnel the earliest can only realize that average each working group completes 5m every day; Then earthing, Shen, Shanghai Inland Steel and Qingdao Ge Ergu company develop precast reinforced cage construction technology jointly, after the good reinforcing cage of the first colligation in ground again lifting enter the job practices of carrying out filling concrete in tunnel, the job schedule of each working group every day is brought up to the 30m left and right.Because the reinforcing cage size is larger, to often need on tunnel, offering special passage during transportation in tunnel, very inconvenient, in addition, although the reinforcing cage construction method has significantly improved construction speed, but still can not meet well the requirement of engineering construction duration, many subway vibration isolation location can't meet to yield and uses floating ballast bed vibration isolation technique, the hidden danger that causes vibration to disturb residents because of the duration.For addressing this problem, the technician of Shen, Shanghai earthing Inland Steel and Qingdao Ge Ergu company develops again the novel floating ballast bed structure that a kind of floating plate plate length is no more than 8 meters, as application number, is specifically 201220091895.0 described in Chinese patent.This novel floating ballast bed structure, because the floating plate plate is long shorter, can in tunnel, be transported easily, therefore floating plate can carry out on ground the prefabricated suitability for industrialized production, so also referred to as the short floating plate of prefabricated, by the short floating plate of prefabricated again handling assemble construction to tunnel, can greatly improve speed of application, the quality of floating plate also more easily guarantees.But, because the plate of the short floating plate of prefabricated is long shorter, effect is stuck up in turning over of producing when preventing that vehicle from entering from plate body one end, in plate body, arranges Elastic Isolator, also is 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 single Elastic Isolators that arrange in the short floating plate of prefabricated usually, in test, find, the difference of this vertical stiffness, influence each other, add the objective reality of the various errors such as substrate construction error, while causing the short floating plate of prefabricated to carry out jacking and leveling, adopt traditional approach height adjusting cushion plate is set respectively on plate end isolation mounting and Elastic Isolator by theoretical design load and heightens pad, often need to repeatedly to plate end isolation mounting and Elastic Isolator, be heightened the design elevation requirement that leveling could meet railway roadbed, therefore affected to a certain extent the progress of whole construction.
How to solve the short floating plate of prefabricated the problem of leveling length consuming time is installed, thereby realize further improving the final purpose of speed of application, become the difficult problem in the industry that this technology of restriction is further applied.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, a kind of installation leveling method of simple, quick, the short floating plate of 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 while it is characterized in that built-in Elastic Isolator supports jointly in plate end isolation mounting and plate body when the short floating plate of prefabricated, comprises the steps:
(1) the short floating plate of prefabricated identified according to line on the railway roadbed basis and the plan-position of plate end isolation mounting, plate end isolation mounting is placed in to precalculated position, again the short floating plate of pre-processed prefabricated is utilized hoisting transportation equipment to be placed on plate end isolation mounting, the plan-position of adjusting the short floating plate of prefabricated;
(2) measure respectively the actual height of the plate body upper surface of respective panels end isolation mounting position, the short floating plate of prefabricated end with respect to the disjunction mark of laying a railway track, the design elevation of contrast railway roadbed, calculate difference between the two, utilize this difference to deduct again the thickness that comprehensive leveling compensation rate obtains the required height adjusting cushion plate of each plate end isolation mounting;
(3) the short floating plate of prefabricated sling again or utilized jack stand, place the height adjusting cushion plate of respective thickness on each plate end isolation mounting, completing the first jacking leveling of the short floating plate of prefabricated;
(4) in the joint sheeve be fixedly installed, put into built-in Elastic Isolator in the short floating plate of prefabricated, gross mass according to 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 the single static determinacy load value of this theory as adjusting load, utilize the hydraulic pump drive jack to apply the adjustment load of identical numerical value on Elastic Isolator, clearance height in Elastic Isolator upper surface and joint sheeve between the support stop soffit is the required thickness of heightening pad, the pad of heightening of respective thickness is set on Elastic Isolator, complete the leveling of jacking for the second time of the short floating plate of this prefabricated,
(5) again measure respectively the actual height of the plate body upper surface of respective panels end isolation mounting position, the short floating plate of prefabricated end with respect to the disjunction mark of laying a railway track, the design elevation of contrast railway roadbed, calculate difference between the two, again adjust the height adjusting cushion plate gross thickness between the short floating plate of prefabricated and correspondence position plate end isolation mounting according to the 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 one by one all prefabricated floating plates in ballast bed structure puts jacking leveling in place, first, jacking leveling for the second time and accurate jacking leveling, realizes the installation leveling of the short floating plate of floating ballast bed middle prefabricated.
Wherein, comprehensive leveling compensation 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 average decrement had elastic component when the short floating plate of prefabricated is supported jointly by all plate end isolation mountings and built-in Elastic Isolator, comprehensive leveling compensation rate is the absolute value of the difference of secondary calculating averaging of income decrement again.
In order further to improve efficiency of construction, while in step (1), putting the short floating plate of prefabricated, can be according to the described method of step (1), place in proper order and adjust the plan-position of the short floating plate of polylith prefabricated, form at least one workshop section is installed, again the short floating plate of each piece prefabricated of installing in workshop section is implemented to first jacking leveling, jacking leveling for the second time and accurate jacking leveling, thereby realize the installation leveling of the short floating plate of floating ballast bed middle prefabricated.This form of construction work, be conducive to strengthen the continuity of constructing operation, optimizes the inter process flow process, and then effectively improve efficiency of construction.Its Specific construction mode of operation can be varied, for example, can select to install an end of workshop section as initial, implement continuously first jacking leveling, jacking leveling for the second time and accurately jacking leveling to the short floating plate of each piece prefabricated in workshop section is installed successively, thereby realize the installation leveling of the short floating plate of prefabricated in the floating plate railway roadbed; Also can select to install an end of workshop section as initial, successively to after in installation workshop section, the short floating plate of all prefabricateds is implemented first jacking leveling, to being installed, the short floating plate of all prefabricateds in workshop section carries out jacking leveling for the second time successively again, and then carry out accurate jacking leveling to the short floating plate of all prefabricateds in workshop section is installed successively, thereby realize the installation leveling of the short floating plate of prefabricated in the floating plate railway roadbed; Can also be to after in installation workshop section, the short floating plate of all prefabricateds be implemented first jacking leveling and jacking leveling for the second time, setting up rail on the short floating plate of prefabricated under installation workshop section, measure relatively the lay a railway track actual height of disjunction mark of plate end isolation mounting corresponding position tread in the short floating plate of each prefabricated, contrast Track desigh elevation, increase and decrease height adjusting cushion plate accordingly on plate end isolation mounting according to comparing result, until complete the accurate jacking leveling that the short floating plate of all prefabricateds in workshop section is installed, realize the installation leveling of the short floating plate of prefabricated in the floating plate railway roadbed.In addition, when tread is laid a railway track the difference of the actual height of disjunction mark and Track desigh elevation while being less than 2mm relatively, can utilize railway rail pad to carry out leveling, no longer adjust the height adjusting cushion plate thickness on respective panels end isolation mounting, this operating type can effectively reduce the short floating plate of jacking prefabricated and proofread and correct the number of times of the short floating plate of prefabricated plan-position, thereby the reduction difficulty of construction, improve efficiency of construction.
For the situation of shared plate end isolation mounting is set between the short floating plate of contiguous prefabricated formula in floating ballast bed structure, in first jacking leveling process, before measuring the actual height of the short floating plate upper surface of prefabricated with respect to the disjunction mark of laying a railway track corresponding to common plate end isolation mounting place, need adjacent two short floating plates of prefabricated all are placed in advance on plate end isolation mounting and adjust plan-position, and make plate end isolation mounting shared between adjacent two short floating plates of prefabricated to the abutting end of two short floating plates of the prefabricated bearing state of all remaining valid, the disjunction mark of relatively laying a railway track is again implemented to measure.In order to overcome the adverse effect that various early stages, construction error was brought, reduce and repeatedly adjust number of times, in step (1), after utilizing hoisting transportation equipment to be placed on plate end isolation mounting the short floating plate of pre-processed prefabricated, can at first confirm between each plate end isolation mounting and the short floating plate of prefabricated to remain valid supporting, set in advance height adjusting cushion plate on the plate end isolation mounting of not realizing fully contacting with the short floating plate of prefabricated bottom surface, until all realize effectively supporting between all plate end isolation mountings and the short floating plate of prefabricated, and then the short floating plate of prefabricated is implemented to first jacking leveling, jacking leveling for the second time and accurate jacking leveling operation.By these above-mentioned measures, the stressed actual forced status closer to when work of plate end isolation mounting, so measurement result is more accurate, also have more directive significance, the thickness of determining accordingly required height adjusting cushion plate is more accurate reasonable, can effectively reduce the adjustment number of times, improves efficiency of construction.
In addition, the adverse effect of bringing for the height error of eliminating the railway roadbed foundation construction, in step (1), can be on the railway roadbed basis before board for putting end isolation mounting, at first measure each center, plate end isolation mounting plan-position that on the railway roadbed basis, line identifies actual height with respect to the 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 that increases respective thickness on plate end isolation mounting, the adverse effect caused to eliminate railway roadbed foundation construction error, and then utilize hoisting transportation equipment be placed on plate end isolation mounting by the prefabricated floating plate 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, be that the railway roadbed basis only allows the design height less than or equal to standard, should be higher than the design height of standard.
In addition, it is to be noted, while utilizing the 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 be loaded one by one and arrange the mode of operation of heightening pad; Also can be for each Elastic Isolator in the short floating plate plate body of prefabricated corresponding a jack be set, utilize compression pump to drive each Elastic Isolator in the short floating plate of all jack pair prefabricateds to apply respectively adjustment load simultaneously, then arrange and heighten pad on Elastic Isolator, this adjustment mode, the stressing conditions of each Elastic Isolator is closer to best duty, precision is higher, and 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 be because, for operating modes such as curved sections, the Elastic Isolator that the inside and outside both sides of track arrange stressed different, so also difference to some extent of the adjustment load applied.
The form of the Elastic Isolator that the present invention is applicable can be varied, is 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, in installation process, does not need repeatedly the short floating plate of prefabricated to be heightened to leveling, substantially can realize the disposable leveling of heightening, very convenient quick, the technical bottleneck that it has overcome existing method of operating, be conducive to further improve speed of application, meets the requirement of construction period, it has improved the applicability of steel spring floating slab road bed technology greatly, and market application foreground is very wide.
The 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 is for coordinating one of schematic diagram through the short floating plate of prefabricated of first jacking leveling and plate end isolation mounting.
Fig. 5 be after jacking leveling for the second time the short floating plate of prefabricated and plate end isolation mounting and Elastic Isolator coordinate one of schematic diagram.
Fig. 6 is two of floating ballast bed structural representation.
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 two of schematic diagram.
Fig. 9 is for coordinating two of schematic diagram through the short floating plate of prefabricated of first jacking leveling and plate end isolation mounting.
Figure 10 be after jacking leveling for the second time the short floating plate of prefabricated and plate end isolation mounting and Elastic Isolator coordinate two of schematic diagram.
The specific embodiment
Embodiment mono-
Below with the every short floating plate of prefabricated in floating ballast bed, by four plate end isolation mountings and four built-in Elastic Isolators, jointly be supported for example, 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 for convenience the inventive method, at first related floating ballast bed basic structure is described.Described floating ballast bed typical structure as shown in Figures 1 and 2, the short floating plate 2 of the prefabricated of take is example, it is supported jointly by four plate end isolation mountings 4 and four built-in Elastic Isolators 8, break away from basic 6 surfaces, Elastic Isolator 8 is placed in the joint sheeve 5 be fixedly installed in the short floating plate 2 of prefabricated, in addition, be provided with and heighten pad 9 between support stop 10 in Elastic Isolator 8 end faces and joint sheeve 5, between the short floating plate 2 of plate end isolation mounting 4 and prefabricated, height adjusting cushion plate 7 is set, in order to guarantee the short floating plate of prefabricated smooth transition load in the course of the work, cooperative bearing, also be provided with shear hinge 11 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, at this, for the ease of seeing other structures clearly, in the drawings track structure are not specifically illustrated, hereby explanation.
The short floating plate 2 of the prefabricated of below take is example, illustrates 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, and specific operation process is as follows:
(1) the short floating plate 2 of prefabricated identified according to line on railway roadbed basis 6 and the plan-position of four plate end isolation mountings 4, plate end isolation mounting 4 is placed in respectively to precalculated position, utilize hoisting transportation equipment to be placed on plate end isolation mounting 4 the short floating plate 2 of pre-processed prefabricated again, adjust the plan-position of the short floating plate 2 of prefabricated, specifically as shown in Figure 3;
(2) measure respectively the actual height of the plate body upper surface of the short floating plate of prefabricated 2 respective panels end isolation mounting 4 positions, end with respect to the disjunction mark of laying a railway track, the design elevation of contrast railway roadbed, calculate difference between the two, utilize this difference to deduct again the thickness that comprehensive leveling compensation rate obtains each plate end isolation mounting 4 required height adjusting cushion plate 7;
(3) the short floating plate 2 of prefabricated sling again or utilized jack stand, place the height adjusting cushion plate 7 of respective thickness on each plate end isolation mounting 4, completing the first jacking leveling of the short floating plate 2 of prefabricated, the state after first jacking leveling as shown in Figure 4;
(4) the interior built-in Elastic Isolator 8 of putting into respectively of four joint sheeves 5 that are fixedly installed in the short floating plate of prefabricated, gross mass according to 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 the single static determinacy load value of this theory as adjusting load, utilize the hydraulic pump drive jack to apply one by one the adjustment load of identical numerical value on Elastic Isolator 8, Elastic Isolator 8 is compressed, clearance height in Elastic Isolator 8 upper surfaces and joint sheeve 5 between support stop 10 soffits is the required thickness of heightening pad 9, what respective thickness was set on Elastic Isolator 8 heightens pad 9, utilization is heightened pad 9 and is occupied the gap between support stop 10 soffits in Elastic Isolator 8 upper surfaces and joint sheeve 5, complete the leveling of jacking for the second time of the short floating plate of this prefabricated, concrete state as shown in Figure 5,
(5) again measure respectively the actual height of the plate body upper surface of the short floating plate of prefabricated 2 respective panels end isolation mounting 4 positions, end with respect to the disjunction mark of laying a railway track, the design elevation of contrast railway roadbed, calculate difference between the two, again adjust the height adjusting cushion plate gross thickness between the short floating plate of prefabricated and correspondence position plate end isolation mounting according to the 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 one by one other all prefabricated floating plates in the short floating plate 3 of prefabricated and ballast bed structure puts jacking leveling in place, first, jacking leveling for the second time and accurate jacking leveling, realize the installation leveling of the short floating plate of floating ballast bed middle prefabricated, its state as shown in Figure 2.
Wherein, comprehensive leveling compensation method for determination of amount is, the weight of the short floating plate 2 of the prefabricated of usining is as static load, calculate the average decrement had elastic component when the short floating plate 2 of prefabricated is only provided support by four plate end isolation mountings 4, calculate the average decrement had elastic component when the short floating plate 2 of prefabricated is supported jointly by four plate end isolation mountings and four Elastic Isolators, comprehensive leveling compensation rate is the absolute value of the difference of secondary calculating averaging of income decrement again.The specific algorithm of comprehensive leveling compensation rate and adjustment load can, with reference to following formula, for convenience of description, first be defined as follows following parameters:
M---the gross mass of the short floating plate of prefabricated;
G---acceleration of gravity;
N
1---the every short floating plate correspondence of prefabricated arranges the total quantity of plate end isolation mounting;
N
2---the every short floating plate correspondence of 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;
The plate body upper surface of h---the respective panels end isolation mounting position, end of the short floating plate of measurement prefabricated is with respect to the actual height of the disjunction mark of laying a railway track;
H
1---the weight of the short floating plate of prefabricated is as dead weight on all plate end isolation mountings and Elastic Isolator the 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 the required height adjusting cushion plate of plate end isolation mounting;
T---comprehensive leveling compensation rate;
The single static determinacy load of the theory that F---Elastic Isolator is born, adjust load.
The above-mentioned parameter definition is applicable to all embodiment of the present invention, in this special instruction.According to the definition of above-mentioned parameter and the concrete technical scheme of this example, can derive following formula:
H
1=Mg/（n
1*K
1+n
2*K
2） ①
H
2=Mg/（n
1*K
1） ②
t=H
2-H
1 ③
S
1=（H-h）-t ④
F=K
2*H
1 ⑤
Due to above-mentioned parameter or can obtain in the design stage, perhaps can by instruments such as level gauges, measure 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 very soon the thickness S of required height adjusting cushion plate 7 on the middle plate end isolation mounting 4 of step (2)
1and required adjustment load on step (4) Elastic vibration isolator 8, and then can realize fast the jacking leveling to the short floating plate of prefabricated.In practical operation, can set design formulas by the Microsoft Excel in computer, data with existing is inputted in advance, after again data measured being listed in after in-site measurement, get final product, operate more simple and efficient.
This example only is supported for example with the every short floating plate of prefabricated in floating ballast bed by four plate end isolation mountings and four internal elastic vibration isolators simultaneously and describes, during practical application, difference according to plate length, two, six, eight even more Elastic Isolators also can be set in the short floating plate of prefabricated, can be applicable to the installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of the present invention.When the quantity of Elastic Isolator changes, only need to calculate corresponding comprehensive leveling compensation rate with reference to above-mentioned comprehensive leveling compensation method for determination of amount and get final product.In the engineering application, for saving time, can be after floating ballast bed design completes, plate end isolation mounting and Elastic Isolator configuration according to the short floating plate of each piece prefabricated, precompute the comprehensive leveling compensation rate that each plate end isolation mounting is corresponding, contrast at the scene the short floating plate of corresponding prefabricated and directly apply and get final product.
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 according to the operating habit difference, also can assemble the elements such as rail, fastener, sleeper or shear hinge in advance on the short floating plate of prefabricated, but before unrealized final installation leveling, 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, the leveling effect is installed in impact.
The form of the Elastic Isolator that the present invention is applicable can be varied, is 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, in installation process, does not need repeatedly the short floating plate of prefabricated to be heightened to leveling, substantially can realize the disposable leveling of heightening, very convenient quick, the technical bottleneck that it has overcome existing method of operating, be conducive to further improve speed of application, meets the requirement of construction period, it has improved the applicability of steel spring floating slab road bed technology greatly, and market application foreground is very wide.
Embodiment bis-
The embodiment mono-of still take described floating ballast bed be example, the every short floating plate of prefabricated is supported jointly by four plate end isolation mountings and four built-in Elastic Isolators, different from embodiment mono-, in the installation leveling method of the short floating plate of this floating ballast bed middle prefabricated of routine described the present invention, while in step (1), putting the short floating plate of prefabricated, according to the described method of step (1), place in proper order and adjust the plan-position of the short floating plate of polylith prefabricated, form at least one workshop section is installed, again the short floating plate of each piece prefabricated of installing in workshop section is implemented to first jacking leveling, jacking leveling for the second time and accurate jacking leveling, thereby 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 this floating ballast bed middle prefabricated of routine described the present invention, the first jacking leveling of the short floating plate of prefabricated, jacking leveling for the second time and accurate jacking leveling operation are identical with the method described in embodiment mono-, at this, no longer are repeated in this description.
With embodiment mono-, compare, the installation leveling method of the short floating plate of the described floating ballast bed middle prefabricated of this example, be conducive to strengthen the continuity of constructing operation, optimizes the inter process flow process, and then effectively improve efficiency of construction.
Embodiment tri-
The floating ballast bed of embodiment mono-described structure of still take is example, the know-why based on embodiment mono-and embodiment bis-, and the installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of the present invention can also be done following differentiation, and its specific operation process is as follows:
(1) the short floating plate of prefabricated identified according to line on the railway roadbed basis and the plan-position of four plate end isolation mountings, plate end isolation mounting is placed in respectively to precalculated position, again the short floating plate of pre-processed prefabricated is utilized hoisting transportation equipment to be placed on plate end isolation mounting, 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, form at least one workshop section is installed;
(2) select to install an end of workshop section as initial, measure respectively the actual height of the plate body upper surface of respective panels end isolation mounting position, the first short floating plate of prefabricated end with respect to the disjunction mark of laying a railway track, the design elevation of contrast railway roadbed, calculate difference between the two, utilize this difference to deduct again the thickness that comprehensive leveling compensation rate obtains the required height adjusting cushion plate of each plate end isolation mounting;
(3) the short floating plate of prefabricated sling again or utilized jack stand, place the height adjusting cushion plate of respective thickness on each plate end isolation mounting, completing the first jacking leveling of a short floating plate of prefabricated;
(4), according to the first jacking leveling step of the short floating plate of above-mentioned prefabricated, complete successively the first jacking leveling that the short floating plate of all prefabricateds in workshop section is installed;
(5) in four joint sheeves that are fixedly installed, put into respectively built-in Elastic Isolator in the short floating plate of prefabricated, gross mass according to 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 the single static determinacy load value of this theory as adjusting load, utilize the hydraulic pump drive jack to apply one by one the adjustment load of identical numerical value on Elastic Isolator, Elastic Isolator is compressed, clearance height in Elastic Isolator upper surface and joint sheeve between the support stop soffit is the required thickness of heightening pad, the pad of heightening of respective thickness is set on Elastic Isolator, utilization is heightened pad and is occupied the gap between the support stop soffit in Elastic Isolator upper surface and joint sheeve, complete the leveling of jacking for the second time of a short floating plate of prefabricated,
(6), according to the leveling of the jacking for the second time step of the short floating plate of above-mentioned prefabricated, complete successively the leveling of jacking for the second time that the short floating plate of all prefabricateds in workshop section is installed;
(7) again measure respectively the actual height of the plate body upper surface of respective panels end isolation mounting position, the short floating plate of prefabricated end with respect to the disjunction mark of laying a railway track, the design elevation of contrast railway roadbed, calculate difference between the two, again adjust the height adjusting cushion plate gross thickness between the short floating plate of prefabricated and correspondence position plate end isolation mounting according to the gained height difference, until the short floating plate height of prefabricated meets design requirement, complete the accurate jacking leveling of a short floating plate of prefabricated;
(8), according to the accurate jacking leveling step of the short floating plate of above-mentioned prefabricated, complete successively the accurate jacking leveling that the short floating plate of all prefabricateds in workshop section is installed;
(9), according to above-mentioned steps, what other that complete ballast bed structure were installed prefabricated floating plate in workshop sections puts jacking leveling in place, first, jacking leveling for the second time and accurate jacking leveling, realizes the installation leveling of the short floating plate of floating ballast bed middle prefabricated.
The installation leveling method of the short floating plate of the described floating ballast bed middle prefabricated of this example, the continuity of constructing operation is better, is conducive to optimize the inter process flow process, and then effectively improves efficiency of construction.
Embodiment tetra-
With embodiment tri-, compare, the kind of the difference of the installation leveling method of the short floating plate of this floating ballast bed middle prefabricated of routine described the present invention is, according to step (1) in embodiment tri-to the described method of step (6), after completing successively the leveling of jacking for the second time that the short floating plate of all prefabricateds in workshop section is installed, operated as follows again: under installation workshop section, on the short floating plate of prefabricated, setting up rail, measure relatively the lay a railway track actual height of disjunction mark of plate end isolation mounting corresponding position tread in the short floating plate of prefabricated, contrast Track desigh elevation, increase and decrease height adjusting cushion plate accordingly on plate end isolation mounting according to comparing result, complete the accurate jacking leveling of a short floating plate of prefabricated, according to the method for operating of above-mentioned accurate jacking leveling, complete successively the accurate jacking leveling that the short floating plate of all prefabricateds in workshop section is installed, realize the installation leveling of the short floating plate of prefabricated in the floating plate railway roadbed.
This routine described method in the installation leveling of the short floating plate of prefabricated, has also realized the adjustment that Rail is risen in realizing the floating plate railway roadbed, has reduced the adjustment operation, has improved efficiency of construction.
It is to be noted especially, as a kind of existing conventional application mode, be provided with flexible railway rail pad between rail and fastener, in accurate jacking leveling process, when the tread recorded is laid a railway track the difference of the actual height of disjunction mark and Track desigh elevation while being less than 2mm relatively, also can utilize the thickness of controlling railway rail pad to carry out leveling, no longer adjust the height adjusting cushion plate thickness on respective panels end isolation mounting, this operating type can effectively reduce the short floating plate of jacking prefabricated and proofread and correct the number of times of the short floating plate of prefabricated plan-position, thereby reduction difficulty of construction, improve efficiency of construction, among the protection domain also required in the present invention.
Embodiment five
The floating ballast bed structure of typical case as shown in Figure 6, Figure 7, with the difference of floating ballast bed structure shown in Fig. 1 and Fig. 2 in embodiment mono-, be, shared plate end isolation mounting is set between the short floating plate of contiguous prefabricated formula in floating ballast bed structure, wherein plate end isolation mounting 20 is supporting the abutting end of the short floating plate 1 of prefabricated and the short floating plate 2 of prefabricated simultaneously, and plate end isolation mounting 21 is supporting the abutting end of the short floating plate 2 of prefabricated and the short floating plate 3 of prefabricated simultaneously.It is pointed out that at this and distinguish plate end isolation mounting 20 and plate end isolation mounting 21 only for convenience of description, in actual applications, plate end isolation mounting 20 and plate end isolation mounting 21 may be also identical.
Based on know-why of the present invention, for the situation of shared plate end isolation mounting is set between the short floating plate of contiguous prefabricated formula 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 with respect to the disjunction mark of laying a railway track corresponding to common plate end isolation mounting place, need adjacent two short floating plates of prefabricated all are placed in advance on plate end isolation mounting and adjust plan-position, and make plate end isolation mounting shared between adjacent two short floating plates of prefabricated to the abutting end of two short floating plates of the prefabricated bearing state of all remaining valid, the disjunction mark of relatively laying a railway track is again implemented to measure.The short floating plate 2 of the prefabricated of below take is specifically described as the installation leveling method of example to the short floating plate of the described floating ballast bed middle prefabricated of this example:
(1) the short floating plate of prefabricated identified according to line on 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 respectively precalculated position, again by the short floating plate 1 of pre-processed prefabricated, 2 and 3 utilize respectively hoisting transportation equipment to be placed on plate end isolation mounting, adjust the short floating plate 1 of prefabricated, 2 and 3 plan-position, specifically as shown in Figure 8, wherein plate end isolation mounting 20 is effectively supporting the abutting end of the short floating plate 1 of prefabricated and the short floating plate 2 of prefabricated, plate end isolation mounting 21 is effectively supporting the abutting end of the short floating plate 2 of prefabricated and the short floating plate 3 of prefabricated,
(2) measure respectively the actual height of the plate body upper surface of prefabricated corresponding each plate end isolation mounting 20 in short floating plate 2 ends and each plate end isolation mounting 21 position with respect to the disjunction mark of laying a railway track, the design elevation of contrast railway roadbed, calculate difference between the two, utilize this difference to deduct again the thickness that comprehensive leveling compensation rate obtains each plate end isolation mounting 20 and 21 required height adjusting cushion plate 7;
(3) the short floating plate 2 of prefabricated is again sling or utilized jack stand, place the height adjusting cushion plate 7 of respective thickness between the short floating plate 2 of prefabricated and each plate end isolation mounting 20 and 21, complete the first jacking leveling of the short floating plate 2 of prefabricated, the state after first jacking leveling as shown in Figure 9;
(4) the interior built-in Elastic Isolator 8 of putting into respectively of four joint sheeves 5 that are fixedly installed in the short floating plate 2 of prefabricated, gross mass according to the short floating plate 2 of prefabricated, plate end isolation mounting 20 and 21 quantity, the quantity of Elastic Isolator 8, plate end isolation mounting 20 and 21 vertical stiffness, the vertical stiffness of Elastic Isolator 8, pre-determine the single static determinacy load of theory that each Elastic Isolator 8 is born, using the single static determinacy load value of this theory as adjusting load, utilize the hydraulic pump drive jack to apply one by one the adjustment load of identical numerical value on Elastic Isolator 8, Elastic Isolator 8 is compressed, clearance height in Elastic Isolator 8 upper surfaces and joint sheeve 5 between support stop 10 soffits is the required thickness of heightening pad 9, what respective thickness was set on Elastic Isolator 8 heightens pad 9, utilization is heightened pad 9 and is occupied the gap between support stop 10 soffits in Elastic Isolator 8 upper surfaces and joint sheeve 5, complete the leveling of jacking for the second time of the short floating plate 2 of this prefabricated, concrete state as shown in figure 10,
(5) again measure respectively the actual height of the plate body upper surface of the short floating plate 2 end respective panels end isolation mountings 20 of prefabricated and 21 positions with respect to the disjunction mark of laying a railway track, the design elevation of contrast railway roadbed, calculate difference between the two, again adjust the height adjusting cushion plate gross thickness between the short floating plate of prefabricated and correspondence position plate end isolation mounting according to the 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 one by one the short floating plate of other all prefabricateds in the short floating plate 1 of prefabricated, the short floating plate 3 of prefabricated and ballast bed structure puts jacking leveling in place, first, jacking leveling for the second time and accurate jacking leveling, realizes the installation leveling of the short floating plate of floating ballast bed middle prefabricated.
It should be noted that, at present in the engineering application, support the plate end isolation mounting of adjacent two short floating plates of prefabricated simultaneously, its support force for the short floating plate of each piece prefabricated is approximately uniform, therefore can be similar to and think that the vertical stiffness contribution of the corresponding every short floating plate of prefabricated of each shared plate end isolation mounting is 1/2nd of the vertical global stiffness of plate end isolation mounting, notes getting final product when calculating comprehensive leveling compensation rate and adjusting load.In addition, at the floating ballast bed position be connected with solid concrete roabed, the prefabricated short floating plate adjacent with a solid concrete roabed end adjacent with solid concrete roabed can arrange independently plate end isolation mounting, when the short floating plate of this piece prefabricated is installed to leveling, this routine described method and the described method of enforcement can be combined with, there iing common plate end isolation mounting one side, by this routine described method, leveling is installed, in a side of using independent plate end isolation mounting, utilizing the described method of embodiment mono-that leveling is installed.
In this routine described method, 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 with respect to the disjunction mark of laying a railway track corresponding to common plate end isolation mounting place, need adjacent two short floating plates of prefabricated all are placed in advance on plate end isolation mounting and adjust plan-position, and make plate end isolation mounting shared between adjacent two short floating plates of prefabricated to the abutting end of two short floating plates of the prefabricated bearing state of all remaining valid, mainly these measures of wanting by above-mentioned, the stressed actual forced status during closer to static load that makes plate end isolation mounting, therefore measurement result is more accurate, also have more directive significance, the thickness of determining accordingly required height adjusting cushion plate is more accurate rationally, can effectively reduce the adjustment number of times, improve efficiency of construction.
Certainly, know-why according to embodiment tri-, in this routine described installation jacking leveling method, at least one also can be set workshop section is installed, take again workshop section is installed arbitrary end as initial, successively the short floating plate of all prefabricateds of installing in workshop section is implemented to first jacking leveling, and then implement successively jacking leveling for the second time, the last short floating plate of all prefabricateds of installing successively again in workshop section is implemented accurate jacking leveling, realize the installation jacking leveling of the short floating plate of floating ballast bed middle prefabricated, also can realize same effect, in the protection domain all required in the present invention.
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), after utilizing hoisting transportation equipment to be placed on plate end isolation mounting the short floating plate of pre-processed prefabricated, at first confirm between each plate end isolation mounting and the short floating plate of prefabricated to remain valid supporting, set in advance height adjusting cushion plate on the plate end isolation mounting of not realizing fully contacting with the short floating plate of prefabricated bottom surface, until all realize effectively supporting between all plate end isolation mountings and the short floating plate of prefabricated, and then according to the method described in embodiment five, the short floating plate of prefabricated is implemented to first jacking leveling, jacking leveling for the second time and accurate jacking leveling operation, at this, no longer be repeated in this description.
This routine described method, further perfect to institute's recording method in embodiment five, because there are the reasons such as construction error in the railway roadbed basis, when adjacent two short floating plates of prefabricated are placed on shared plate end isolation mounting, the situation that the plate end isolation mounting of indivedual positions does not contact fully with the short floating plate of prefabricated may appear, thereby the accuracy to follow-up measurement impacts, by this routine described measure, can effectively eliminate this hidden danger, therefore measurement result is more accurate, also have more directive significance, the thickness of determining accordingly required height adjusting cushion plate is more accurate rationally, can effectively reduce the adjustment number of times, improve efficiency of construction.
Embodiment seven
For the adverse effect that the height error of eliminating the railway roadbed foundation construction is brought, with method described in embodiment five, to compare, the installation leveling method of the short floating plate of the floating ballast bed middle prefabricated of the present invention can also be done following improvement:
In step (1), on the railway roadbed basis before board for putting end isolation mounting, at first measure each center, plate end isolation mounting plan-position that on the railway roadbed basis, line identifies actual height with respect to the disjunction mark of laying a railway track, the design height on contrast railway roadbed basis, the calculated height difference, then board for putting end isolation mounting, part lower than design height is recompensed by the height adjusting cushion plate that increases respective thickness on plate end isolation mounting, the adverse effect caused to eliminate railway roadbed foundation construction error, and then utilize hoisting transportation equipment be placed on plate end isolation mounting by the short floating plate of prefabricated and adjust plan-position, later step is identical with the description in embodiment five, at this, no longer repeat.
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, be that the railway roadbed basis only allows the design height less than or equal to standard, should be higher than the design height of standard.
Embodiment eight
The installation leveling method of the short floating plate of this floating ballast bed middle prefabricated of routine described the present invention, with the difference of embodiment five described methods, be, while utilizing the jack pair Elastic Isolator to load in step (4), for each Elastic Isolator in the short floating plate plate body of prefabricated 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 adjustment load simultaneously, then arrange and heighten pad on Elastic Isolator, utilization is heightened pad and is occupied the gap between the support stop soffit in Elastic Isolator upper surface and joint sheeve, complete the leveling of jacking for the second time of the short floating plate of this prefabricated.All the other methods of operating are described identical with embodiment five, at this, no longer repeat.
This routine described installation leveling method, the all Elastic Isolators that utilize 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 actual static load duty, it is higher that it adjusts precision, better effects if, be conducive to reduce and repeat to adjust number of times, significantly improve efficiency of construction.
Know-why of the present invention equally also is suitable for applying in other embodiments of the invention; and; based on know-why of the present invention; also all Elastic Isolators that arrange in the short floating plate of prefabricated can be divided into to some groups; and then take group as unit; utilize each Elastic Isolator in every group of jack pair to load simultaneously and arrange and heighten pad; until complete the leveling of jacking for the second time of the short floating plate of prefabricated; these technical schemes are all the simple extensions of the technology of the present invention principle, in the protection domain all required in the present invention.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 be because, for operating modes such as curved sections, the Elastic Isolator that the inside and outside both sides of track arrange stressed different, so also difference to some extent of the adjustment load applied.This point is applicable to other embodiment of the present invention too.
The form of the Elastic Isolator that the present invention is applicable can be varied, is specifically as follows steel spring vibration isolator, rubber shock absorber, rubber-metal composite vibration isolator or air cushion shock absorber.
More than provided 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; purpose is the convenient method of understanding better the present invention; it should not be considered as limitation of the present invention; wherein the technical scheme in each embodiment also can cross-reference; as long as based on know-why of the present invention, among the protection domain all required in the present invention.
Claims (11)
1. the installation leveling method of the short floating plate of floating ballast bed middle prefabricated, while it is characterized in that built-in Elastic Isolator supports jointly in plate end isolation mounting and plate body when the short floating plate of prefabricated, comprise the steps:
(1) the short floating plate of prefabricated identified according to line on the railway roadbed basis and the plan-position of plate end isolation mounting, plate end isolation mounting is placed in to precalculated position, again the short floating plate of pre-processed prefabricated is utilized hoisting transportation equipment to be placed on plate end isolation mounting, the plan-position of adjusting the short floating plate of prefabricated;
(2) measure respectively the actual height of the plate body upper surface of respective panels end isolation mounting position, the short floating plate of prefabricated end with respect to the disjunction mark of laying a railway track, the design elevation of contrast railway roadbed, calculate difference between the two, utilize this difference to deduct again the thickness that comprehensive leveling compensation rate obtains the required height adjusting cushion plate of each plate end isolation mounting;
(3) the short floating plate of prefabricated sling again or utilized jack stand, place the height adjusting cushion plate of respective thickness on each plate end isolation mounting, completing the first jacking leveling of the short floating plate of prefabricated;
(4) in the joint sheeve be fixedly installed, put into built-in Elastic Isolator in the short floating plate of prefabricated, gross mass according to 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 the single static determinacy load value of this theory as adjusting load, utilize the hydraulic pump drive jack to apply the adjustment load of identical numerical value on Elastic Isolator, clearance height in Elastic Isolator upper surface and joint sheeve between the support stop soffit is the required thickness of heightening pad, the pad of heightening of respective thickness is set on Elastic Isolator, complete the leveling of jacking for the second time of the short floating plate of this prefabricated,
(5) again measure respectively the actual height of the plate body upper surface of respective panels end isolation mounting position, the short floating plate of prefabricated end with respect to the disjunction mark of laying a railway track, the design elevation of contrast railway roadbed, calculate difference between the two, again adjust the height adjusting cushion plate gross thickness between the short floating plate of prefabricated and correspondence position plate end isolation mounting according to the 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 one by one all prefabricated floating plates in ballast bed structure puts jacking leveling in place, first, jacking leveling for the second time and accurate jacking leveling, realizes the installation leveling of the short floating plate of floating ballast bed middle prefabricated.
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 comprehensive leveling compensation 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 again the average decrement had elastic component when the short floating plate of prefabricated is supported jointly by all plate end isolation mountings and built-in Elastic Isolator, comprehensive leveling compensation rate is the absolute value of the difference of secondary calculating averaging of income decrement.
3. 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 the described method of step (1), place in proper order and adjust the plan-position of the short floating plate of polylith prefabricated, form at least one workshop section is installed, again the short floating plate of each piece prefabricated of installing in workshop section is implemented to first jacking leveling, jacking leveling for the second time and accurate jacking leveling, thereby realize the installation leveling of the short floating plate of floating ballast bed middle prefabricated.
4. the installation leveling method of the short floating plate of floating ballast bed middle prefabricated according to claim 3, it is characterized in that selecting to install an end of workshop section as initial, successively to after in installation workshop section, the short floating plate of all prefabricateds is implemented first jacking leveling, to being installed, the short floating plate of all prefabricateds in workshop section carries out jacking leveling for the second time successively again, and then carry out accurate jacking leveling to the short floating plate of all prefabricateds in workshop section is installed successively, thereby realize the installation leveling of the short floating plate of prefabricated in the 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 after in installation workshop section, the short floating plate of all prefabricateds is implemented first jacking leveling and jacking leveling for the second time, setting up rail on the short floating plate of prefabricated under installation workshop section, measure relatively the lay a railway track actual height of disjunction mark of plate end isolation mounting corresponding position tread in the short floating plate of each prefabricated, contrast Track desigh elevation, increase and decrease height adjusting cushion plate accordingly on plate end isolation mounting according to comparing result, until complete the accurate jacking leveling that the short floating plate of all prefabricateds in workshop section is installed, realize the installation leveling of the short floating plate of prefabricated in the floating plate railway roadbed.
6. the installation leveling method of the short floating plate of floating ballast bed middle prefabricated according to claim 5, it is characterized in that relatively laying a railway track the difference of the actual height of disjunction mark and Track desigh elevation while being less than 2mm when tread, utilize railway rail pad to carry out leveling, no longer adjust the height adjusting cushion plate thickness on respective panels end isolation mounting.
7. according to claim 1, the installation leveling method of the short floating plate of 2 or 3 described floating ballast bed middle prefabricated, it is characterized in that when shared plate end isolation mounting is set 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 with respect to the disjunction mark of laying a railway track corresponding to common plate end isolation mounting place, need adjacent two short floating plates of prefabricated all are placed in advance on plate end isolation mounting and adjust plan-position, and make plate end isolation mounting shared between adjacent two short floating plates of prefabricated to the abutting end of two short floating plates of the prefabricated bearing state of remaining valid, the disjunction mark of relatively laying a railway track is again implemented to measure.
8. according to claim 1, the installation leveling method of the short floating plate of 2 or 3 described floating ballast bed middle prefabricated, it is characterized in that in step (1), after utilizing hoisting transportation equipment to be placed on plate end isolation mounting the short floating plate of pre-processed prefabricated, at first confirm between each plate end isolation mounting and the short floating plate of prefabricated to remain valid supporting, set in advance height adjusting cushion plate on the plate end isolation mounting of not realizing fully contacting with the short floating plate of prefabricated bottom surface, until all realize effectively supporting between all plate end isolation mountings and the short floating plate of prefabricated, and then the short floating plate of prefabricated is implemented to first jacking leveling, jacking leveling for the first time and accurate jacking leveling operation.
9. according to claim 1, the installation leveling method of the short floating plate of 2 or 3 described floating ballast bed middle prefabricated, it is characterized in that in step (1), on the railway roadbed basis before board for putting end isolation mounting, at first measure each center, plate end isolation mounting plan-position that on the railway roadbed basis, line identifies actual height with respect to the 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 that increases respective thickness on plate end isolation mounting, the adverse effect caused to eliminate railway roadbed foundation construction error, and then utilize hoisting transportation equipment be placed on plate end isolation mounting by the prefabricated floating plate and adjust plan-position.
10. the installation leveling method of the short floating plate of floating ballast bed middle prefabricated according to claim 1, while it is characterized in that in step (4) utilizing the jack pair Elastic Isolator to load, each Elastic Isolator is 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 adjustment load simultaneously.
11., according to the installation leveling method of the short floating plate of the described floating ballast bed middle prefabricated of claim 1 or 10, it 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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