CN103669114B - Ballast bed base prefabricated slab and application thereof - Google Patents
Ballast bed base prefabricated slab and application thereof Download PDFInfo
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- CN103669114B CN103669114B CN201210327998.7A CN201210327998A CN103669114B CN 103669114 B CN103669114 B CN 103669114B CN 201210327998 A CN201210327998 A CN 201210327998A CN 103669114 B CN103669114 B CN 103669114B
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Abstract
The invention relates to a ballast bed base prefabricated slab and an application thereof. The ballast bed base prefabricated slab comprises a slab body formed by prefabricating reinforced concrete materials. The size of the slab body is smaller than the design size of a base. At least three height and dip angle adjusting devices are arranged on the slab body. The ballast bed base prefabricated slab is simple in structure, capable of being processed and manufactured in the place outside a tunnel or a factory, and the processing precision and quality are more easily ensured. The ballast bed base constructed by applying the ballast bed base prefabricated slab is small in error and high in precision. The construction method for the ballast bed base constructed by applying the ballast bed base prefabricated slab is easy, convenient and rapid to operate, the flatness, cross fall and other key indexes of the base can be effectively controlled with the help of the ballast bed base prefabricated slab, the site construction difficulty is greatly reduced, the construction efficiency can be greatly improved, waste caused by secondary treating or reworking is reduced, the ballast bed base prefabricated slab is excellent in economical performance, practicability and applicability and can be widely used for base construction inside the tunnel with linear segments and curving segments, and market application prospects are quite wide.
Description
Technical field
The invention belongs to field of track traffic, especially relate to a kind of utilize new precast panel technology to construct railway roadbed substrate construction method and corresponding precast plate.
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 floating plate road bed technique, and its vibration isolation efficiency is high, stable work in work, has become common recognition in the industry.
Traditional railway roadbed and base are one.Solid concrete roabed is then divided into substrate and floating plate two parts by floating plate railway roadbed, floating plate adopts flexible member to be bearing in substrate, therefore floating plate system is higher to the substrate flatness requirement near the supporting elements such as steel spring vibration isolator, resilient sleeper-bearing, needs to reach 2mm/m
2, vertical error controls at 0 ~-5mm simultaneously.At present, substrate all adopts the construction method of cast-in-site, impact by the restriction of job site ambient conditions and complicated construction technique and on odjective causes such as constructor's skill set requirements are high, often there is local comparatively big error in substrate surface, the designing requirement of planeness and elevation can not be met, trimming of doing over again often occurs, and greatly constrains the speed of application in floating plate location.
In addition, the design of tradition floating plate railway roadbed adopts the scheme of horizontal substrate, inclination floating plate at curved section, this scheme finds some shortcomings in application process, be mainly manifested in: every block floating plate arrangement of reinforcement is different, the model that damped products relates to is many, it is all very inconvenient to produce and install, and the design and construction cycle is long, efficiency is low, high in cost of production.Not enough for overcoming these, the standing procedure that superelevation has become the design of floating plate railway roadbed is set in recent years in substrate, but, this technical scheme encounters again new problem in practical operation, show: at mild wet air oxidation, superelevation value (along track laterally) is linear gradient, and circuit itself also has (along the track longitudinally) gradient, mild wet air oxidation substrate surface is made to be a curved surface in theory, because cast in situs construction substrate is more extensive, construct oblique substrate time concrete is also easy flows to lower, the substrate that these unfavorable factors cause curved section site operation to complete often is difficult to meet design requirement, elevation height error exceeds the critical field of 0 ~-5mm, cross fall is undesirable, error is sometimes up to ± 30mm.
According to existing form of construction work, the substrate of cast-in-site often occurs that the indexs such as planeness, elevation, curved section cross fall can not meet design requirement, therefore often need after construction to carry out again to polish or the after-treatment such as padded, not only labor intensive material resources and restrict construction speed, even need to cut time serious to reform, cause very large economic waste.In sum, market is in the urgent need to a kind of easy operation and the higher substrate construction method of construction precision and Related product.
Summary of the invention
An object of the present invention is to overcome above-mentioned defect, provides a kind of application operating simple, more easily ensures the railway roadbed substrate precast plate of construction precision.
Railway roadbed substrate precast plate of the present invention is achieved in that and comprises by the prefabricated plate body of Reinforced Concrete Materials, and the size of plate body is less than the design size of substrate, and plate body is provided with at least three height and inclination-angle regulating device.
Described height and inclination-angle regulating device comprise the anchoring piece with plate body integrated setting, and anchoring piece is provided with the screwed hole and screw rod that cooperatively interact.When arranging, the principle of a plane is determined according to 3, height and inclination-angle regulating device at least need to arrange three, in the application, can be different with the actual conditions of weight according to plate body length, determine adopt height and the concrete quantity of inclination-angle regulating device, such as four, five even more.
During in order to apply concrete perfusion or grouting material more convenient, the plate body of railway roadbed substrate precast plate of the present invention can also be provided with grouting channel.In addition, in order to the concrete that pours into the later stage or grouting material are combined into one better, the plate body lower surface of railway roadbed substrate precast plate of the present invention can also be carried out dabbing process or be provided with concaveconvex structure.In addition, the consideration of draining for convenience, can also arrange gutter at the middle part of plate body upper surface.In view of in current floating ballast bed structure, the design strength overwhelming majority of substrate performs according to the concrete strength criterion of C40, therefore, generally, railway roadbed substrate precast plate of the present invention requires that in plate body, concrete intensity is not less than the concrete prescribed strength of C40.The consideration of carrying for convenience and transporting, plate body can also be arranged at least one loss of weight through hole.
The plate body structure of railway roadbed substrate precast plate of the present invention is various informative, except the platy structure of routine, plate body can also adopt other form of structure, such as, plate body comprises longitudinal spandrel girder and connector, longitudinal spandrel girder arranges two altogether, arranges at least one connector between two longitudinal spandrel girders.In addition, when there being dewatering needs, the upper surface in the middle part of connector can also be fixedly installed the disappearance masterplate corresponding with gutter shape.In addition, the form of structure of connector also can be varied, its except the same with longitudinal spandrel girder adopt Reinforced Concrete Materials and make except, connector also can be made up of steel bar framework, or be directly made up of shape, described shape comprises angle steel, channel-section steel, i iron, reinforcing bar, steel pipe etc.
In order to meet the instructions for use of substrate, the flatness error of railway roadbed substrate precast plate plate body upper surface of the present invention is less than 2mm/m
2.It should be noted that, the function of described longitudinal spandrel girder in ballast bed structure is mainly used for supporting isolation mounting, therefore in general, in the plate body of railway roadbed substrate precast plate of the present invention comprising longitudinal girder structures, the intensity of the concrete material used at least longitudinal spandrel girder is not less than the concrete prescribed strength of C40.Be noted that the longitudinal direction described in the present invention in addition, corresponding with the bearing of trend of rail; Described transverse direction, corresponding with the transverse direction of rail.
Second object of the present invention is to provide a kind of railway roadbed substrate of applying described railway roadbed substrate precast plate and constructing, it is characterized in that the end face of railway roadbed substrate precast plate plate body overlaps with the design work face of substrate, fill concrete closely knit in space between plate body and ballast bed structure base surface or grouting material, the upper surface of concrete or grouting material filling part is not higher than plate body end face.
For ensureing the bulk strength of underlying structure, in general, the concrete adopted or the intensity of grouting material are not less than the concrete prescribed strength of C30.
3rd object of the present invention, is that providing a kind of applies the construction method that described railway roadbed substrate precast plate constructs railway roadbed substrate, is characterized in that comprising the steps:
(1) clean out the foreign material on ballast bed structure base surface, according to the requirement of engineering drawing, rule on the ballast bed structure base surface of job site according to disjunction mark of laying a railway track and identify the plan-position of railway roadbed substrate precast plate;
(2) prefabricated railway roadbed substrate precast plate is transported to job site, and is contrasted the relevant position of ruling and being placed on ballast bed structure base surface;
(3) according to the requirement of engineering drawing, with reference to the disjunction mark of laying a railway track pre-set in ballast bed structure, by measurement mechanism, adjusted height and the gradient of railway roadbed substrate precast plate plate body by height and inclination-angle regulating device, the end face of plate body is overlapped with the design work face of this place's substrate;
(4) with reference to plate body end face, concrete perfusion or grouting material in the space between plate body and ballast bed structure base surface, until fill closely knit completely, make the upper surface of new perfusion part not higher than plate body upper surface;
(5) construction and installation of other railway roadbed substrate precast plate are completed according to aforesaid operations method;
(6) maintenance and protection are carried out to the concrete newly poured into or grouting material part, until it reaches design strength, namely obtain finally complete substrate.
The present invention's application railway roadbed substrate precast plate is constructed in the construction method of railway roadbed substrate, described ballast bed structure base surface refers to the support surface of substrate in ballast bed structure, its concrete form difference to some extent in different engineering, such as, in construction of tunnel, namely tunnel surface is the support surface of substrate, and therefore corresponding with substrate tunnel surface is described ballast bed structure base surface; In viaduct engineering, the support surface of substrate is the beam surface in bridge superstructure, and the beam surface of the bridge superstructure that therefore substrate is corresponding is described ballast bed structure base surface; In ground surface works, the support surface of substrate is the road bed directly contacted with substrate below substrate, the whole ballast bed structure comprising substrate is all arranged on above road bed, this road bed is described ballast bed structure base surface, based on above-mentioned explanation, also be same principle in Other Engineering, no longer enumerate.In addition, according to the actual needs of engineering, in many application places, before clearing up the foreign material on ballast bed structure base surface by step (1), first need to do surperficial dabbing process to ballast bed structure base surface.Such as, in general, in tunnel, engineering is except the tunnel of shield structure structure, all needs to do surperficial dabbing process to ballast bed structure base surface, therefore according to actual demands of engineering, can increase the link of surperficial dabbing process in construction method.
It should be noted that, in practice of construction process, construction method also can change to some extent.Such as, when adopting the shorter railway roadbed substrate precast plate of the present invention of length to carry out substrate construction, because monolithic plate body size is less, carry out grouting operation number of repetition one by one many, efficiency is low, therefore in step (2), adjacent at least two pieces of railway roadbed substrate precast plates can be set as one group, then respectively height is carried out to all railway roadbed substrate precast plates in same group and the gradient adjusts, again to concrete perfusion or grouting material in the space in same group between each block railway roadbed substrate precast plate and ballast bed structure base surface, until fill closely knit completely, to divide into groups according to aforesaid operations method the construction and installation of each group railway roadbed substrate precast plate, finally maintenance is carried out to new perfusion part, until it reaches design strength, namely finally complete substrate is obtained.Polylith railway roadbed substrate precast plate is combined into multiple larger unit and carries out constructing operation respectively again by said method, and repeat operation few, efficiency of construction is higher, in addition, adopts this construction method to be also conducive to improving the globality of substrate.Certainly, according to above-mentioned technological thought, as a kind of special form of construction work, also first all railway roadbed substrate precast plates can all be set the rear height that carries out respectively and adjust with the gradient, and then unify concrete perfusion or grouting material.Be noted that in addition, the measurement mechanism mentioned in step (3), comprise scale, transit, total powerstation, level gauge etc., because the use of these survey tools in field of track traffic is very general, therefore in the present invention to specifically selecting which kind of measurement mechanism and use procedure thereof not to be described in detail.In step (4) when concrete perfusion or grouting material, adopting can the concrete of Self-leveling or grouting material, or adopts the method for filling of slip casing by pressure.
In addition, in work progress, being shifted to prevent from adjusting the plate body caused in railway roadbed substrate precast plate plate body of the present invention height and gradient process, if desired, after the height of plate body and the gradient adjust, again can carrying out accurate adjustment to the position of plate body.In addition, when adopting method concrete perfusion or the grouting material of slip casing by pressure in step (4), in the process of concrete perfusion or grouting material, railway roadbed substrate precast plate plate body of the present invention is forced to be shifted, such as occurred level moves or local is upwards lifted, during pouring construction, counterweight can be set on plate body.It is to be particularly noted that there is the adverse effect that volume contraction is brought railway roadbed substrate in the curing process in order to avoid poured into concrete or grouting material, when constructing, preferably, adopt shrinkage-free concrete or grouting material.
Railway roadbed substrate precast plate of the present invention, structure is simple, and can place outside tunnel or factory process make, machining accuracy and quality more easily ensure.The railway roadbed substrate that the present invention's application railway roadbed substrate precast plate is constructed, error is little, and precision is high.The present invention's application railway roadbed substrate precast plate constructs the construction method of railway roadbed substrate, simple and efficient to handle, the key indexs such as the planeness of substrate and cross fall can control effectively by railway roadbed substrate precast plate, the difficulty of site operation reduces greatly, greatly can improve efficiency of construction, reduce after-treatment or the waste caused of doing over again, its economy, practicality and applicability are all good, substrate construction in the tunnel that can be widely used in straightway, curved section, mild wet air oxidation, market application foreground is very wide.
Accompanying drawing explanation
Fig. 1 is one of structural representation of railway roadbed substrate precast plate of the present invention.
Fig. 2 is that the A-A of Fig. 1 is to sectional view.
One of application schematic diagram that Fig. 3 is the substrate of railway roadbed shown in Fig. 1 precast plate.
Fig. 4 is the top view of Fig. 3.
The structural representation of the railway roadbed substrate of the present invention that Fig. 5 constructs for the precast plate of railway roadbed substrate shown in application drawing 1.
Fig. 6 is the structural representation of concrete diaphragm.
Fig. 7 is the top view of Fig. 6.
Fig. 8 is the structural representation two of railway roadbed substrate precast plate of the present invention.
Fig. 9 is that the B-B of Fig. 8 is to sectional view.
One of application schematic diagram that Figure 10 is the substrate of railway roadbed shown in Fig. 8 precast plate.
Figure 11 is the top view of Figure 10.
The structural representation of the railway roadbed substrate of the present invention that Figure 12 constructs for the precast plate of railway roadbed substrate shown in application drawing 8.
Figure 13 is the structural representation three of railway roadbed substrate precast plate of the present invention.
Figure 14 is that the C-C of Figure 13 is to sectional view.
One of application schematic diagram that Figure 15 is the substrate of railway roadbed shown in Figure 13 precast plate.
Figure 16 is the application schematic diagram two of the substrate of railway roadbed shown in Figure 13 precast plate.
Figure 17 is the top view of Figure 15.
The structural representation of the railway roadbed substrate of the present invention that Figure 18 constructs for railway roadbed substrate precast plate shown in application Figure 13.
Figure 19 is the structural representation four of railway roadbed substrate precast plate of the present invention.
Figure 20 is the structural representation five of railway roadbed substrate precast plate of the present invention.
Figure 21 is the application schematic diagram four of the substrate of railway roadbed shown in Figure 13 precast plate.
Figure 22 is the structural representation six of railway roadbed substrate precast plate of the present invention.
Figure 23 is that the D-D of Figure 22 is to sectional view.
One of application schematic diagram that Figure 24 is the substrate of railway roadbed shown in Figure 22 precast plate.
Figure 25 is the top view of Figure 24.
The structural representation of the railway roadbed substrate of the present invention that Figure 26 constructs for railway roadbed substrate precast plate shown in application Figure 22.
Figure 27 is the structural representation seven of railway roadbed substrate precast plate of the present invention.
Figure 28 is that the E-E of Figure 27 is to sectional view.
One of application schematic diagram that Figure 29 is the substrate of railway roadbed shown in Figure 28 precast plate.
Figure 30 is the top view of Figure 29.
The structural representation of the railway roadbed substrate of the present invention that Figure 31 constructs for railway roadbed substrate precast plate shown in application Figure 28.
Figure 32 is the structural representation eight of railway roadbed substrate precast plate of the present invention.
Figure 33 is that the F-F of Figure 32 is to sectional view.
One of application schematic diagram that Figure 34 is the substrate of railway roadbed shown in Figure 32 precast plate.
Figure 35 is the top view of Figure 34.
The structural representation of the railway roadbed substrate of the present invention that Figure 36 constructs for railway roadbed substrate precast plate shown in application Figure 32.
Figure 37 is the structural representation nine of railway roadbed substrate precast plate of the present invention.
Figure 38 is the structural representation ten of railway roadbed substrate precast plate of the present invention.
Figure 39 is 11 of the structural representation of railway roadbed substrate precast plate of the present invention.
Figure 40 is 12 of the structural representation of railway roadbed substrate precast plate of the present invention.
Figure 41 is that the H-H of Figure 40 is to sectional view.
One of application schematic diagram that Figure 42 is the substrate of railway roadbed shown in Figure 40 precast plate.
Figure 43 is the top view of Figure 42.
The structural representation of the railway roadbed substrate of the present invention that Figure 44 constructs for railway roadbed substrate precast plate shown in application Figure 40.
Figure 45 is 13 of the structural representation of railway roadbed substrate precast plate of the present invention.
Figure 46 is 14 of the structural representation of railway roadbed substrate precast plate of the present invention.
Figure 47 is that the J-J of Figure 46 is to sectional view.
One of application schematic diagram that Figure 48 is the substrate of railway roadbed shown in Figure 46 precast plate.
The structural representation of the railway roadbed substrate of the present invention that Figure 49 constructs for railway roadbed substrate precast plate shown in application Figure 46.
Figure 50 is 15 of the structural representation of railway roadbed substrate precast plate of the present invention.
Detailed description of the invention
Embodiment one
Railway roadbed substrate precast plate of the present invention as depicted in figs. 1 and 2, comprise by the prefabricated plate body 1 of Reinforced Concrete Materials, the size of plate body 1 is less than the actual design size of substrate in engineering, the middle part of plate body 1 upper surface is provided with gutter 2, plate body 1 is also respectively equipped with height and inclination-angle regulating device 3 along self longitudinal centre line both sides, wherein, plate body 1 is 12.5m along the length of self longitudinal direction, height and inclination-angle regulating device 3 arrange 10 altogether, two be one group longitudinally uniform along plate body.Described height and inclination-angle regulating device 3 comprise the anchoring piece 5 of steel, anchoring piece 5 are also provided with the screwed hole cooperatively interacted and screw rod 4, and screw rod 4 is also steel, and anchoring piece 5 and plate body 1 are prefabricated into one.Adjust screw rod 4 and the relative position of screwed hole in each height and inclination-angle regulating device 3, just can realize height and the gradient of adjustable plate 1.
Apply railway roadbed substrate precast plate of the present invention when constructing floating ballast bed substrate in tunnel, for straightway in the tunnel of shield structure structure, specifically can operate in accordance with the following steps:
(1) clean out the foreign material on ballast bed structure base surface (i.e. tunnel surface), according to the requirement of engineering drawing, rule on the ballast bed structure base surface of job site according to disjunction mark of laying a railway track and identify the plan-position of railway roadbed substrate precast plate;
(2) prefabricated railway roadbed substrate precast plate is transported to job site, and contrasted the relevant position of ruling and being placed on ballast bed structure base surface, at this, corresponding tunnel surface is described ballast bed structure base surface, therefore replace ballast bed structure base surface to state with tunnel surface in construction method below, hereby illustrate;
(3) according to the requirement of engineering drawing, with reference to the disjunction mark of laying a railway track pre-set in ballast bed structure, by measurement mechanism, adjusted height and the gradient of plate body 1 by height and inclination-angle regulating device 3, the end face of plate body is overlapped, as shown in Figure 3 with the design work face of this place's substrate;
(4) as shown in Figure 4, the baffle plate 7 that pitch plank is made is set respectively at the longitudinal two ends of plate body 1, with reference to plate body 1 end face, in the space between plate body 1 and tunnel wall 6, Self-leveling grouting material 40 is poured into by the space between plate body 1 side and tunnel wall 6, until fill closely knit completely, make the upper surface of new perfusion part not higher than plate body upper surface, clip the part that screw rod 4 exceeds plate body 1 upper surface;
(5) construction and installation of other railway roadbed substrate precast plates are completed according to aforesaid operations method;
(6) carry out maintenance and protection to grouting material 40 part of new perfusion, until it reaches design strength, obtain finally complete substrate, i.e. the present invention's application railway roadbed substrate precast plate railway roadbed substrate of constructing, its structure as shown in Figure 5.
It is to be noted, after final substrate completes, the baffle plate 7 that the pitch plank arranged between railway roadbed substrate precast plate of the present invention is made need not be removed, utilize the space occupied by baffle plate 7, use as the shrinkage joint in substrate, in light of this situation, adopt the actual (real) thickness of baffle plate 7 can choose according to the design width at shrinkage joint.In addition, grouting material 40 is specially can the high-strength mortar of Self-leveling, and certainly, other can the pouring material of Self-leveling can also to adopt high-strength concrete etc., also can realize same function.Mention in step (6) and maintenance and protection are carried out to the concrete newly poured into or grouting material part; the implication wherein protected refers to should take measures to prevent the load-bearing too early of new perfusion part; in order to avoid there is the defects such as breakage, slight crack; this point is applicable to all embodiments of the present invention; illustrate in the lump at this, no longer repeatedly describe.
Railway roadbed substrate precast plate of the present invention, structure is simple, and can place, ground outside tunnel or prefabricated component factory process make, machining accuracy and quality more easily ensure.Be described for the construction and installation of one piece of railway roadbed substrate precast plate of the present invention in this example, in actual applications, the construction and installation of the even whole railway roadbed substrate precast plate of the present invention of polylith can be carried out simultaneously, therefore, speed of application is faster, this point is applicable to all embodiments of the present invention, illustrates in the lump at this.The present invention's application railway roadbed substrate precast plate constructs the construction method of substrate in tunnel, simple and efficient to handle, the planeness of substrate depends primarily on the planeness of railway roadbed substrate precast plate of the present invention, because railway roadbed substrate precast plate of the present invention have employed processing technology prefabricated outside tunnel, its manufacturing process no longer limits by execution conditions in tunnel, machining accuracy and quality more easily ensure, can just plate body upper surface flatness error be controlled be less than 2mm/m in process
2, the workmanship of substrate thus using railway roadbed substrate precast plate of the present invention to construct is higher, and speed of application is also faster, effectively can shorten construction period, economy and practicality remarkable.Due in use procedure, elastic vibration isolation device in ballast bed structure is directly placed in the surface that the present invention has railway roadbed substrate precast plate, plate body upper surface flatness error of controlling well is just equal to the flatness error controlling railway roadbed substrate, thus the railway roadbed substrate of the present invention that railway roadbed substrate precast plate is constructed is applied, its workmanship is more secure, the waste that can effectively avoid after-treatment to cause.
After the screw rod 4 of height and inclination-angle regulating device 3 carries out standardization in railway roadbed substrate precast plate of the present invention, also following technical scheme can be adopted: in the step (4) of construction method of the present invention, no longer block screw rod 4 part exceeding plate body end face, but change into after the grouting material 40 of new perfusion reaches primary strength, screw rod 4 is screwed out, such screw rod 4 just can realize recycling, and then realize reducing material input, reduce construction cost.In practical application, can coating butter or silicone oil on screw rod in advance, prevent and grouting material or concrete binding.
Be noted that the consideration of hoisting transportation and convenient construction in tunnel for convenience in addition, take into account the crane capacity of hanging device in existing tunnel, preferably, the plate body of railway roadbed substrate precast plate of the present invention is no more than 12.5m along the length of self longitudinal direction.Because this example is described for straightway interval construction in tunnel, the length of the railway roadbed substrate precast plate plate body of the present invention therefore selected is longer, is specially 12.5m.In practical application, different according to project situation, what also plate body length can be arranged is shorter, such as plate body length is set to 1.15m, 2m, 3.6m, 4.8m, 6m etc., and the plate body length of the railway roadbed substrate precast plate of the present invention applied in same substrate engineering can be identical, also can be different, can grasp flexibly in engineering.But in order to match with the rail of current 25m full-length, simultaneously in order to reduce the different length kind of railway roadbed substrate precast plate of the present invention to facilitate processing, preferably, using the integral multiple of 25m as the plate body length of railway roadbed substrate precast plate of the present invention, or approximate integral multiple; Certainly, can also according to fastener spacing, spacing due to ballast bed structure Elastic vibration isolator is arranged to the integral multiple of fastener spacing, in the majority with 2 times in existing engineering, therefore correspondingly plate can be grown the integral multiple that be set in fastener spacing or close to integral multiple, object of the present invention can be realized well.Have again, in view of in structure floating ballast bed in current tunnel, the design strength overwhelming majority of substrate performs according to the concrete strength criterion of C40, in order to ensure that substrate strength reaches requirement, railway roadbed substrate precast plate of the present invention to require in plate body adopt the intensity of concrete material to be not less than the concrete strength criterion of C40, meanwhile, the strength of materials of selected grouting material is also not less than the concrete prescribed strength of C40.
Embodiment two
Railway roadbed substrate precast plate of the present invention as shown in Figure 8 and Figure 9, be with the difference of embodiment one, plate body 1 is 4.15m along the length of self longitudinal direction, height and inclination-angle regulating device 3 arrange four altogether, wherein two are one group and are divided into two groups, often group height and inclination-angle regulating device 3 are starting apart from longitudinal plate end 1m place of plate body 1 to arrange, between two adjacent groups height and inclination-angle regulating device 3, spacing is 2m.In addition, the screw rod 4 highly and in inclination-angle regulating device 3 is built in anchoring piece 5.In addition, be also provided with two grouting channel 9 in gutter 2, grouting channel 9 is arranged on two height of same group and the centre of inclination-angle regulating device 3.Plate body upper surface flatness error controls be less than 2mm/m
2.
Apply this routine described railway roadbed substrate precast plate of the present invention when constructing floating ballast bed substrate in tunnel, the straightway engineering in the horse-shoe tunnel obtained for tunneling, can operate in accordance with the following steps:
(1) surperficial dabbing process is done to ballast bed structure base surface (i.e. tunnel surface), clean out the foreign material on ballast bed structure base surface, according to the requirement of engineering drawing, rule on the ballast bed structure base surface of job site according to disjunction mark of laying a railway track and identify the plan-position of railway roadbed substrate precast plate;
(2) prefabricated railway roadbed substrate precast plate is transported to job site, and contrasted the relevant position of ruling and being placed on ballast bed structure base surface, as shown in figure 11, when putting, using three pieces of railway roadbed substrate precast plates 10,11 and 12 of the present invention as one group, the dividing plate 8 of the concrete prefabricated one-tenth of C40 is often set between adjacent railway roadbed substrate precast plate in group, often organize the baffle plate 7 that the longitudinal two ends of railway roadbed substrate precast plate arrange pitch plank formation respectively, as shown in Figure 6 and Figure 7, it is dimensioned slightly smaller than the cross section design size of substrate to the shape and structure of its median septum 8;
(3) according to the requirement of engineering drawing, with reference to the disjunction mark of laying a railway track pre-set in ballast bed structure, by measurement mechanism, adjusted height and the gradient of plate body 1 by height and inclination-angle regulating device 3, the end face of plate body is overlapped, as shown in Figure 10 with the design work face of this place's substrate;
(4) with reference to the end face of railway roadbed substrate precast plate, the mode of slip casing by pressure is adopted to pour into grouting material 40 in the space between plate body and tunnel surface 6 by grouting channel 9, until fill closely knit completely, it is to be noted, grouting channel 9 is also filled up with grouting material 40, overflow from grouting channel 9 to prevent grouting material 40, after perfusion when grouting material realizes initial set, the grouting material overflowed by the opening part of grouting channel 9 in bottom surface, gutter 2 is floating, chamber portion in addition in anchoring piece 5 and between screw rod 4 is also filled closely knit with grouting material 40, should notice that the upper surface of all new perfusion parts should higher than plate body upper surface,
(5) construction and installation of other group railway roadbed substrate precast plates are completed according to aforesaid operations method;
(6) carry out maintenance and protection to grouting material 40 part of new perfusion, until it reaches design strength, obtain finally complete substrate, i.e. the present invention's application railway roadbed substrate precast plate railway roadbed substrate of constructing, its structure as shown in figure 12.
Identical with the description in embodiment one, after final substrate completes, segment space shared by the baffle plate 7 that arranges between railway roadbed substrate precast plate of the present invention is used as the shrinkage joint in substrate.
Railway roadbed substrate precast plate of the present invention described in this example, plate body length dimension is less, and the transport in tunnel and position adjustment are more prone to realize, in addition, screw rod 4 highly and in inclination-angle regulating device 3 is built in anchoring piece 5, uses material less, is conducive to reducing cost of production.
The present invention's application railway roadbed substrate precast plate described in this example constructs the construction method of substrate, owing to have employed the shorter railway roadbed substrate precast plate of length, and between adjacent railway roadbed substrate precast plate, set up dividing plate, thus the whole space utilizing grouting material to carry out filling that needs is separated into multiple less independent perfusion space, the filling more easily realizing grouting material is closely knit.After perfusion grouting material, make dividing plate and railway roadbed substrate precast plate be combined into an entirety by grouting material, its globality is better.In addition, it should be noted that, in order to prevent there is gap, when arranging dividing plate between dividing plate and railway roadbed substrate precast plate end face, structure glue can be utilized to be bonded in by dividing plate on plate body end face, thus elimination gap, another benefit of this practice is, in advance three pieces of railway roadbed substrate precast plates and dividing plate can be linked to be an entirety, its overall weight is larger, in the process of follow-up perfusion grouting material, railway roadbed substrate precast plate is not easily shifted, and is conducive to ensureing planar differential systems.It should be noted that, the quantity of grouting channel can set according to actual needs, is described, in practical application during this illustration shows to arrange two grouting channel, the difference long according to plate and the difference of grouting method, also only can arrange a grouting channel or arrange the grouting channel of more than two.
Railway roadbed substrate precast plate of the present invention described in this example and construction method thereof, transport and constructing operation more convenient, grouting channel during construction in the middle part of plate body implements perfusion, less independent perfusion space is gone out owing to utilizing baffle for separating, as long as grouting material is gushed out from plate body both sides, space between plate body and tunnel wall is filled and led up completely, more easily ensure that grouting material is filled closely knit, handled easily and control, be conducive to improving speed of application further.
Embodiment three
Railway roadbed substrate precast plate of the present invention as shown in Figure 13 and Figure 14, be with the difference of embodiment one, plate body 1 is also provided with a grouting channel 9, the side plate body length being provided with grouting channel is slightly short, the face profile of whole plate body 1 is isosceles trapezoid, its length along self longitudinal centre line place is 1.15m, plate body 1 is arranged 4 height and inclination-angle regulating device 3.
Apply this routine described railway roadbed substrate precast plate of the present invention when constructing floating ballast bed substrate in shield tunnel, for mild wet air oxidation, according to the design size of mild wet air oxidation, railway roadbed substrate precast plate outside tunnel described in prefabricated a series of examples, by controlling the surface size of each block railway roadbed substrate precast plate and then the complex-curved of combined and spliced one-tenth mild wet air oxidation, according to splicing order by railway roadbed substrate precast plate number consecutively, prepare to be used for substrate and construct.It is to be noted, because substrate surface in mild wet air oxidation is a curved surface in theory, therefore the appearance and size of each block railway roadbed substrate precast plate is all different, only for Figure 13 in this example, describe for the wherein feature of one piece of railway roadbed substrate precast plate to this routine described railway roadbed substrate precast plate of the present invention.When constructing substrate, can operate in accordance with the following steps:
(1) clean out the foreign material on ballast bed structure base surface, according to the requirement of engineering drawing, rule on the ballast bed structure base surface of job site according to disjunction mark of laying a railway track and identify the plan-position of railway roadbed substrate precast plate;
(2) prefabricated railway roadbed substrate precast plate is transported to job site, and contrasted the relevant position of ruling and being placed on ballast bed structure base surface, as shown in figure 16, when putting, according to number order, ten pieces of railway roadbed substrate precast plates of the present invention are put as one group successively, the spacing of about 5cm is left between adjacent railway roadbed substrate precast plate of the present invention, often the longitudinal two ends of group railway roadbed substrate precast plate arrange the baffle plate 7 that pitch plank is made respectively, it should be noted that, because map sheet is limited, railway roadbed substrate precast plate 16 is only show in diagram, 17, 50, the part railway roadbed substrate precast plates such as 18 and 19,
(3) according to the requirement of engineering drawing, with reference to the disjunction mark of laying a railway track pre-set in ballast bed structure, by measurement mechanism, height and the gradient of plate body 1 is adjusted by height and inclination-angle regulating device 3, the end face of plate body is overlapped with the design work face of this place's substrate, because the size of the railway roadbed substrate precast plate of this example employing is less, be shifted to prevent plate body in adjustment process, after height adjusts with the gradient, again position accurate adjustment is carried out to plate body, then counterweight 15 is set on plate body and is shifted to prevent plate body in filling process; In addition, arrange baffle plate 14 and spill to prevent slip casting, counterweight 15 can be utilized during construction simultaneously to be pushed down by baffle plate 14 in the side that the gradient is lower, in order to slip casting is convenient, on baffle plate 14, corresponding grouting channel 9 is provided with grout hole 13, specifically as shown in Figure 15 and Figure 17;
(4) with reference to the end face of railway roadbed substrate precast plate, the mode of slip casing by pressure is adopted to pour into grouting material 40 in the space between plate body and tunnel surface 6 by grout hole 13, until fill closely knit completely, it is to be noted, grouting channel 9 is also filled up with grouting material 40, clip screw rod 4 and expose part on plate body 1 surface, should notice that the upper surface of all new perfusion parts should higher than plate body upper surface;
(5) construction and installation of other group railway roadbed substrate precast plates are completed according to aforesaid operations method;
(6) carry out maintenance and protection to grouting material 40 part of new perfusion, until it reaches design strength, obtain finally complete substrate, i.e. the present invention's application railway roadbed substrate precast plate railway roadbed substrate of constructing, its structure as shown in figure 18.
Grouting material 40 described in this example is for being mixed with the high-strength mortar of fibrous material.After substrate maintenance completes, by the baffle plate 7 arranged between railway roadbed substrate precast plate of the present invention without the need to removing, segment space shared by it uses as the shrinkage joint in substrate.In addition, after new perfusion part reaches primary strength, just baffle plate 14 and counterweight can be removed, to facilitate maintenance.Certainly, when sweep is comparatively large, when foundation slope is less, also baffle plate 14 can not be set, utilize and manually gradient face is smeared together, specifically can select concrete operation method according to the actual demand of engineering.Adopting in other the present invention later is also like this in the embodiment of baffle plate, is described in the lump at this.The plate body being 1.15m for longitudinal centre line place plate length in this example is described, when applying, spacing 5cm between adjacent plate body, like this, grouting material is by after fill gaps between adjacent plate body, on the one hand adjacent railway roadbed substrate precast plate of the present invention is linked to be an entirety, improve globality, the length of plate body can be continued on the other hand, make plate body length reach about 1.2m, be two times of conventional fastener spacing 0.6m length, and then match with the spacing of ballast bed structure Elastic vibration isolator.
In this routine described technical scheme, the elevation of mild wet air oxidation substrate and cross fall are controlled by the size of railway roadbed substrate precast plate of the present invention, because railway roadbed substrate precast plate manufactures outside tunnel, its dimensional accuracy and crudy more easily ensure, effectively can ensure that every key index of final substrate meets instructions for use.Be conducive to the number of times and the workload that significantly reduce after-treatment, reduce construction cost, and greatly improve speed of application.In the construction method step (3) that this example is recorded, after the height adjusting plate body 1 by height and inclination-angle regulating device 3 with the gradient, add plate body horizontal level and confirm operation, as there occurs plate body displacement, can make timely corrections, being conducive to ensureing further and improving workmanship, in addition, based on this know-why, also can adopt this operation in other embodiments, illustrate in the lump at this.In step (3), the conveniently demoulding, baffle plate 14 can also scribble release agent or interleaving agent in advance, such as silicone oil etc.
Adopt the mode of slip casing by pressure in this example, pour into grouting material from bottom to top from grout hole 13 and grouting channel 9, be not easy to produce air gap, density is good.Certainly based on the know-why described in this example, in railway roadbed substrate precast plate of the present invention, the position of grouting channel, shape and quantity can be varied, such as shown in Figure 19, plate body 1 both sides of the edge place respectively can arrange the grouting channel 9 that a cross-sectional profiles is part-circular; Also can as shown in figure 20, in plate body 1, be symmetrical arranged two cross-sectional profiles is circular grouting channel 9, can play same effect; Certainly the length due to the railway roadbed substrate precast plate of the present invention adopted is very short, in actual applications, also only grouting channel 9 can be set on part plate body, in addition, grouting channel 9 also can be arranged on the higher side of the gradient, specifically as shown in figure 21, like this, when pouring into, slurry is automatically from eminence toward lower stream, easily ensures that filling is closely knit.
In addition, for railway roadbed substrate precast plate of the present invention shown in Figure 16, when plate body is lighter, screw rod 4 highly and in inclination-angle regulating device 3 also can adopt the nonmetals such as nylon, plastics to make, on the one hand can weight reduction, be conducive to reducing costs on the other hand, the insulating properties of substrate can also be improved.This point is suitable for too for technical scheme described in other embodiments, illustrates in the lump at this.
Embodiment four
Railway roadbed substrate precast plate of the present invention as shown in Figure 22 and Figure 23, be with the difference of the precast plate of railway roadbed substrate shown in Fig. 9 in embodiment two, in order to ensure the structural strength of plate body 1, avoiding both lateral sides plate body to cross manufacture inconvenience and the intensity reduction of strip, shortening plate body 1 length transversely.Plate body 1 is 3.6m along the length of self longitudinal direction, and plate body 1 no longer arranges grouting channel.
Apply this routine described railway roadbed substrate precast plate of the present invention when constructing floating ballast bed substrate in tunnel, for shield tunnel cathetus section, can operate in accordance with the following steps:
(1) clean out the foreign material on ballast bed structure base surface (i.e. tunnel surface), according to the requirement of engineering drawing, rule on the ballast bed structure base surface of job site according to disjunction mark of laying a railway track and identify the plan-position of railway roadbed substrate precast plate;
(2) prefabricated railway roadbed substrate precast plate is transported to job site, and contrasted the relevant position of ruling and being placed on ballast bed structure base surface, as shown in figure 25, when putting, using four pieces of railway roadbed substrate precast plates 20,21,22 and 23 of the present invention as one group, utilize structure glue 24 bonding integral with railway roadbed substrate precast plate adjacent in group, often the longitudinal two ends of group railway roadbed substrate precast plate arrange the baffle plate 7 that pitch plank is made respectively;
(3) according to the requirement of engineering drawing, with reference to the disjunction mark of laying a railway track pre-set in ballast bed structure, by measurement mechanism, adjusted height and the gradient of plate body 1 by height and inclination-angle regulating device 3, the end face of plate body is overlapped, as shown in figure 24 with the design work face of this place's substrate;
(4) with reference to the end face of railway roadbed substrate precast plate, in the space between plate body and tunnel surface 6, high-strength concrete 25 is poured into by the gap between railway roadbed substrate precast plate side and both sides tunnel surface 6, until fill closely knit completely, in this example, high-strength concrete 25 is specially steel fibrous concrete, chamber portion grouting material 40 in addition in anchoring piece 5 and between screw rod 4 is filled closely knit, should notice that the upper surface of all new perfusion parts should higher than plate body upper surface;
(5) construction and installation of other group railway roadbed substrate precast plates are completed according to aforesaid operations method;
(6) carry out maintenance and protection to the high-strength concrete 25 of new perfusion and grouting material 40 part, until it reaches design strength, obtain finally complete substrate, i.e. the present invention's application railway roadbed substrate precast plate railway roadbed substrate of constructing, its structure as shown in figure 26.
After substrate maintenance completes, baffle plate 7 take up space as in railway roadbed substrate shrinkage joint use.In addition, because the railway roadbed substrate precast plate transverse width adopted in this example is narrower, therefore in use, elastic vibration isolation device in ballast bed structure may be put on the surface in new perfusion region beyond plate body 1 at least partly, so answer attentional manipulation newly to pour into the planeness of portion of upper surface after perfusion high-strength concrete 25, control same with plate body 1 of its upper surface flatness error is made to be less than 2mm/m
2, to meet the instructions for use of substrate.It is pointed out that in the present invention owing to have employed railway roadbed substrate precast plate, a good reference plane can be formed to new concrete perfusion part, and the area of new perfusion part also significantly reduces, and more easily constructs and ensures precision.
This routine described railway roadbed substrate precast plate of the present invention, shortens plate body 1 length transversely, can prevent the thinner plate body intensity caused in marginal portion from declining, also reduce the difficulty of plate body processing and fabricating and transport simultaneously.In addition, because the gap between plate body and both sides tunnel wall is comparatively large, therefore additionally need not arrange grouting channel, plate body structure is simpler.This routine described the present invention's application railway roadbed substrate precast plate constructs the construction method of substrate, owing to adopting the lateral length of plate body shorter, when finally coordinating with floating plate Elastic vibration isolator, Elastic Isolator may be placed in the structure of grouting formation at least partly, therefore as the case may be, the packing material that steel fibrous concrete equal strength is higher can be selected, to ensure working strength requirement in construction.In general, the intensity of railway roadbed substrate precast plate of the present invention and the packing material such as selected high-strength concrete and grouting material is all not less than the concrete intensity of C40, thus ensures that the bulk strength of the final railway roadbed substrate of the present invention formed is not less than the concrete prescribed strength of C40.
Embodiment five
Railway roadbed substrate precast plate of the present invention as shown in Figure 27 and Figure 28, be with the difference of the precast plate of railway roadbed substrate shown in Figure 23 in embodiment four, the anchoring piece 5 that steel plate is formed is pre-in plate body 1, and extends plate body 1 from both sides, anchoring piece 5 is arranged screw and coordinates with screw rod 4.Plate body 1 is 4.15m along the length of self longitudinal direction.In addition, the soffit of plate body 1 is also provided with concaveconvex structure 26.
Apply this routine described railway roadbed substrate precast plate of the present invention when constructing floating ballast bed substrate in tunnel, for normal profile section, can operate in accordance with the following steps:
(1) clean out the foreign material on ballast bed structure base surface (i.e. tunnel surface), according to the requirement of engineering drawing, rule on the ballast bed structure base surface of job site according to disjunction mark of laying a railway track and identify the plan-position of railway roadbed substrate precast plate;
(2) prefabricated railway roadbed substrate precast plate is transported to job site, and contrasted the relevant position of ruling and being placed on ballast bed structure base surface, as shown in figure 30, when putting, using three pieces of railway roadbed substrate precast plates 30,31 and 32 of the present invention as one group, often the longitudinal two ends of group railway roadbed substrate precast plate arrange the baffle plate 7 that pitch plank is made respectively;
(3) according to the requirement of engineering drawing, with reference to the disjunction mark of laying a railway track pre-set in ballast bed structure, by measurement mechanism, adjusted height and the gradient of plate body 1 by height and inclination-angle regulating device 3, the end face of plate body is overlapped, as shown in Figure 29 and Figure 30 with the design work face of this place's substrate;
(4) as shown in figure 30, at the longitudinal two ends of railway roadbed substrate precast plate, end face with reference to railway roadbed substrate precast plate arranges baffle plate 27, and utilize counterweight 28 to push down baffle plate 27, the mode of slip casing by pressure is adopted to pour into high-strength concrete 25 in the space between plate body 1 and tunnel surface 6 by the grout hole 29 that baffle plate 27 is arranged, until fill closely knit completely, be noted that especially, also filled closely knit by high-strength concrete 25 with the gap 24 between railway roadbed substrate precast plate adjacent in group, overflow from grout hole 29 to prevent high-strength concrete 25, after perfusion, grout hole 29 is closed, should notice that the upper surface of all new perfusion parts should higher than plate body upper surface,
(5) construction and installation of other group railway roadbed substrate precast plates are completed according to aforesaid operations method;
(6) carry out maintenance and protection to high-strength concrete 25 part of new perfusion, until it reaches design strength, obtain finally complete substrate, i.e. the present invention's application railway roadbed substrate precast plate railway roadbed substrate of constructing, its cross-sectional structure as shown in figure 31.
After substrate maintenance completes, baffle plate 7 take up space as in railway roadbed substrate shrinkage joint use.Railway roadbed substrate precast plate of the present invention described in this example, owing to utilizing the gap between structure glue filling plate body in bend substrate work progress, improves globality on the one hand, can effectively prevent plate body in filling process to be shifted; On the other hand, plate body as shown in figure 27, can be made into the shape of rule relatively, make simpler.In addition, anchoring piece 5 and screw rod 4 are buried in High Strength Concrete Structures, and entirety is more attractive in appearance.Because the soffit of plate body 1 is also provided with concaveconvex structure 26, therefore the High Strength Concrete Structures adhesion of pour into is stronger plate body 1 and later stage, and the globality of the underlying structure of final formation is also better.Based on this know-why, utilization is embedded the method such as sand grains, rubble and arranges convex-concave structure at plate body soffit, or railway roadbed substrate precast plate of the present invention carries out dabbing process in advance at plate body soffit before using, also good effect can be played, if the prefabricated plate body soffit roughness directly obtained is enough large certainly, also can be directly used in without other process and constructs railway roadbed substrate of the present invention.
Embodiment six
Railway roadbed substrate precast plate of the present invention as shown in Figure 32 and Figure 33, comprise by the prefabricated plate body 1 of Reinforced Concrete Materials, the size of plate body 1 is less than the actual design size of substrate in engineering, plate body 1 is arranged with four height and inclination-angle regulating device 3, wherein, plate body 1 is 2m along the length of self longitudinal direction.Described height and inclination-angle regulating device 3 comprise the anchoring piece 5 of steel, anchoring piece 5 are also provided with the screwed hole cooperatively interacted and screw rod 4, and screw rod 4 is also for steel anchoring piece 5 and plate body 1 are prefabricated into one.Plate body 1 upper surface flatness error is less than 2mm/m
2.In addition, a loss of weight through hole 60 is also provided with in the middle part of plate body 1.The intensity of the concrete material adopted in plate body is not less than the concrete strength criterion of C40.
Construct railway roadbed substrate be specifically described to apply this routine described railway roadbed substrate precast plate of the present invention on viaduct below, specifically can operate in accordance with the following steps:
(1) foreign material on ballast bed structure base surface (i.e. the beam surface of bridge superstructure) are cleaned out, according to the requirement of engineering drawing, rule on the ballast bed structure base surface of job site according to disjunction mark of laying a railway track and identify the plan-position of railway roadbed substrate precast plate;
(2) as shown in Figure 34 and Figure 35, prefabricated railway roadbed substrate precast plate is transported to job site, and contrasted the relevant position of ruling and being placed on ballast bed structure base surface, when putting, using three pieces of railway roadbed substrate precast plates 61,62 and 63 of the present invention as one group, often the longitudinal two ends of group railway roadbed substrate precast plate arrange the baffle plate 64 that pitch plank is made respectively, arrange template 66 respectively closed in the space often organized between railway roadbed substrate precast plate and beam surface 67 along plate body both sides;
(3) according to the requirement of engineering drawing, with reference to the disjunction mark of laying a railway track pre-set in ballast bed structure, by measurement mechanism, height and the gradient of plate body 1 is adjusted by height and inclination-angle regulating device 3, the end face of plate body is overlapped with the design work face of this place's substrate, utilize structure glue 65 bonding integral by between railway roadbed substrate precast plate adjacent in same group, specifically as shown in figure 35;
(4) with reference to the end face of railway roadbed substrate precast plate, the mode of slip casing by pressure is adopted to pour into pea gravel concreten 68 in the space between plate body and beam surface 67 by the loss of weight through hole 60 that plate body is arranged, until fill closely knit completely, it should be noted that, loss of weight through hole 60 is also filled closely knit with pea gravel concreten 68, chamber portion grouting material 40 in addition in anchoring piece 5 and between screw rod 4 is filled closely knit, should notice that the upper surface of all new perfusion parts should higher than plate body upper surface;
(5) construction and installation of other group railway roadbed substrate precast plates are completed according to aforesaid operations method;
(6) maintenance and protection are carried out to the pea gravel concreten 68 newly poured into and grouting material 40 part; until it reaches design strength; obtain finally complete substrate, i.e. the present invention's application railway roadbed substrate precast plate railway roadbed substrate of constructing, its cross-sectional structure as shown in figure 36.
Due on viaduct to the particular/special requirement of draining and cabling etc., generally, interval about 6m just needs to arrange one piece of block 64, the wider width of baffle plate 64, general at more than 100mm, can select to be removed by baffle plate 64 after pea gravel concreten 68 initial set or before railway roadbed substrate uses, left space is as shrinkage joint, gutter and cross the use of rail pipeline passway.
Railway roadbed substrate precast plate described in this example, except having the general character advantage described in embodiment one, owing to being provided with loss of weight through hole 60 on plate body, therefore plate body weight is lighter, is conducive to transport and onsite moving.In addition, owing to being provided with loss of weight through hole, do not need additionally to arrange grouting channel again, and in loss of weight through hole after fill concrete, railway roadbed substrate precast plate fixing more firmly on bridge superstructure surface 67, is conducive to the stability improving underlying structure.In addition, be noted that, because external environment condition is poor, therefore the requirement of strength of the selected concrete material of new perfusion part and grouting material is high, so in this routine described technical scheme, the intensity of pea gravel concreten 68 must not lower than C40 concrete strength, can select the concrete of C50 even more high grade if desired.Certainly, pea gravel concreten also can be utilized in this example to substitute grouting material 40 and to be filled in chamber portion in anchoring piece 5 and between screw rod 4, also can serve the same role.
Based on the know-why described in this example, the structure of railway roadbed substrate precast plate of the present invention can also do many differentiation, such as different according to the physical length of plate body, the quantity of loss of weight through hole can be one, also can be more than two or two, in addition, the concrete mode of layout is longitudinally or transversely, also can change to some extent.Concrete example, as shown in figure 37 railway roadbed substrate precast plate of the present invention, be laterally set up in parallel two loss of weight through holes 60 along plate body 1; Railway roadbed substrate precast plate of the present invention, plate body 1 arranges four loss of weight through holes 60 as shown in figure 38; Railway roadbed substrate precast plate of the present invention as shown in figure 39, longitudinally arranges two loss of weight through holes 60 along plate body 1.These technical schemes are all the simple differentiation of this routine described technical scheme, also can realize same effect, all in the protection domain of application claims.
In addition for the surperficial situation being provided with anchor structure of beam of viaduct, convex-concave structure can be arranged give to coordinate and dodge in railway roadbed substrate precast plate bottom surface of the present invention, and finally utilize concrete or grouting material to be connected with bridge surface by railway roadbed substrate precast plate of the present invention, owing to newly pouring into the existence of anchor structure in part, the railway roadbed substrate finally obtained has better horizontal stability.
Embodiment seven
Railway roadbed substrate precast plate of the present invention as shown in Figure 40 and Figure 41, be with the difference of the substrate of railway roadbed shown in Figure 32 precast plate, the plate body of railway roadbed substrate precast plate is made up of two longitudinal spandrel girders 69 and two connectors 70, wherein, longitudinal spandrel girder 69 and connector 70 are made by Reinforced Concrete Materials, the cage of reinforcement integrated setting of the two.In addition, the end face of connector 70 is a little less than the end face of longitudinal spandrel girder 69.In addition, height and inclination-angle regulating device 3 arrange three altogether, wherein, a longitudinal spandrel girder 69 arranges two, another root is arranged one.It should be noted that, the cavity 71 that longitudinal spandrel girder 69 and connector 70 surround serves the function of loss of weight through hole.
Because the function of longitudinal spandrel girder 69 in ballast bed structure is mainly used for supporting isolation mounting, the intensity of the concrete material therefore used in longitudinal spandrel girder 69 is not less than the concrete prescribed strength of C40.For connector 70, it requires relatively low, as long as bonding strength is enough, according to the concrete size of connector and the actual needs of engineering, in manufacture process, also can adopt more low-grade concrete material, such as, adopt C30 concrete, but, for ensureing the bulk strength of underlying structure, in general, the concrete material selected by connector at least will reach the concrete strength level of C30.
In the ballast bed structure engineering of ground line, apply this routine described railway roadbed substrate precast plate of the present invention and construct railway roadbed substrate and can operate in accordance with the following steps:
(1) surperficial dabbing process is done to ballast bed structure base surface (i.e. road bed), then the foreign material on ballast bed structure base surface are cleaned out, according to the requirement of engineering drawing, rule on the ballast bed structure base surface of job site according to disjunction mark of laying a railway track and identify the plan-position of railway roadbed substrate precast plate;
(2) as shown in Figure 42 and Figure 43, prefabricated railway roadbed substrate precast plate is transported to job site, and contrasted the relevant position of ruling and being placed on ballast bed structure base surface, when putting, using two pieces of railway roadbed substrate precast plates 72 and 73 of the present invention as one group, often the longitudinal two ends of group railway roadbed substrate precast plate arrange the baffle plate 74 that pitch plank is made respectively, arrange template 75 respectively along plate body both sides;
(3) according to the requirement of engineering drawing, with reference to the disjunction mark of laying a railway track pre-set in ballast bed structure, by measurement mechanism, height and the gradient of plate body 1 is adjusted by height and inclination-angle regulating device 3, the end face of plate body is overlapped with the design work face of this place's substrate, counterweight 76 is set above railway roadbed substrate precast plate, specifically as shown in figure 43;
(4) with reference to the end face of connector 70 in railway roadbed substrate precast plate, adopted in the space of the mode of slip casing by pressure in the space between plate body and road bed 77 and between plate body and template 75 by the cavity 71 that plate body is arranged and pour into grouting material 40, until fill closely knit completely, it should be noted that, also fill closely knit with grouting material 40 in cavity 71, chamber portion grouting material 40 in addition in anchoring piece 5 and between screw rod 4 is filled closely knit, the upper surface should noting all new perfusion parts all with the either flush of connector 70;
(5) construction and installation of other group railway roadbed substrate precast plates are completed according to aforesaid operations method;
(6) carry out maintenance and protection to grouting material 40 part of new perfusion, until it reaches design strength, obtain finally complete substrate, i.e. the present invention's application railway roadbed substrate precast plate railway roadbed substrate of constructing, its cross-sectional structure as shown in figure 44.
After substrate maintenance completes, baffle plate 74 without the need to remove, its institute take up space as in railway roadbed substrate shrinkage joint use.It should be noted that, described grouting material 40 is specially high-strength mortar, due to in outdoor environment, should ensure that the cured strength of selected grouting material 40 is not less than the concrete prescribed strength of C40.After the grouting material 40 of new perfusion reaches primary strength, get final product stripping 75 and take off counterweight 76; then continue to implement maintenance, until new perfusion part reaches design strength, period tackles new perfusion part and protects; avoid its too early load-bearing, cause occurring mass defect.
Railway roadbed substrate precast plate described in this example, identical with embodiment six, there is the advantage being convenient to transport and onsite moving.The railway roadbed substrate of the present invention that this example obtains, utilizes longitudinal spandrel girder 69 of railway roadbed substrate precast plate to support the elastic vibration isolation device in ballast bed structure in follow-up use procedure, because railway roadbed substrate precast plate plate body upper surface flatness error is less than 2mm/m
2, and selected concrete strength is not less than C40 concrete strength, therefore can meet the requirement of ballast bed structure to substrate completely.For later stage perfusion part, due to the either flush of its upper surface and connector 70, lower than the end face of longitudinal spandrel girder 69, therefore the use of substrate is not affected, the requirement of the aspects such as effects on surface planeness significantly reduces, require low to operative skill in work progress, be conducive to improving efficiency of construction, reduce construction cost.
Based on the know-why described in this example, in railway roadbed substrate precast plate of the present invention, the quantity of connector can set according to actual needs, its quantity can be specifically one, two, three even more, and the form of structure of connector also can be varied, its except the same with longitudinal spandrel girder adopt Reinforced Concrete Materials and make except, connector also can be made up of steel bar framework, or is directly made up of shape.Described shape comprises angle steel, channel-section steel, i iron, reinforcing bar, steel pipe etc.Such as railway roadbed substrate precast plate of the present invention as shown in figure 45; in its plate body, the length of longitudinal spandrel girder 69 is longer; for guaranteed strength; four connectors 70 are set between two longitudinal spandrel girders 69; connector 70 is made up of square steel pipe and with the pre-colligation of cage of reinforcement in longitudinal spandrel girder 69 or weld together, after the cage of reinforcement fluid concrete of longitudinal spandrel girder, and then is solidly fixed with whole longitudinal spandrel girder; good effect can be realized, all in the protection domain of application claims.
Embodiment eight
Railway roadbed substrate precast plate of the present invention as shown in Figure 46 and Figure 47, be with the difference of the substrate of railway roadbed shown in Figure 45 precast plate, connector 70 is made up of cage of reinforcement.In addition, in order to meet the needs of draining, the upper surface in the middle part of connector 70 is fixedly installed the disposable masterplate 78 corresponding with gutter shape, and disposable masterplate 78 is made up of iron sheet, and colligation is fixed on connector 70.In addition, height and the inclination-angle regulating device 3 of structure described in embodiment one is adopted.
As shown in figure 48, when being applied in the tunnel of shield structure structure, its construction method is substantially identical with step described in embodiment one, no longer from the beginning, be described, when difference is perfusion grouting material 40, adopt the mode of slip casing by pressure to pour into grouting material 40 in the space of plate body and tunnel surface 6 by the cavity 71 shown in Figure 46, also fill grouting material 40 in the space of cavity 71 and connector 70, until fill closely knit.The structure of the railway roadbed substrate of the present invention protected and finally obtain after maintenance as shown in figure 49.
Compared with embodiment one, the Unit Weight of the railway roadbed substrate precast plate described in this example is lighter, and reason is convenient to transport and onsite moving.In addition, by the railway roadbed substrate of the present invention that this routine technical scheme obtains, because the cavity 71 in every block railway roadbed substrate precast plate is all that scene completes perfusion grouting material, therefore more solid and reliable for fixing of railway roadbed substrate precast plate, the stability of the railway roadbed substrate formed is also stronger.Be noted that in addition, because the conditions such as tunnel environment temperature and humidity are relatively outdoor stable many, therefore in tunnel, in some engineering, grouting material 40 cured strength adopted meets C30 concrete strength level and can meet design requirement, but the grouting material in the present invention, selected by later stage perfusion or concrete solidification intensity never can lower than the concrete intensity of C30.
Embodiment nine
Railway roadbed substrate precast plate of the present invention as shown in figure 50, be with the difference of the substrate of railway roadbed shown in Figure 45 precast plate, connector 70 is made up of square steel pipe, and the adpting flange 80 arranged by two ends and securing member 81 are linked into an integrated entity with longitudinal spandrel girder 69, arrange anchoring piece (common structure does not specifically illustrate in figure) in corresponding longitudinal spandrel girder 69 to coordinate with adpting flange 80 and securing member 81.
Railway roadbed substrate precast plate of the present invention described in this example, have employed split-type structural between connector 70 and longitudinal spandrel girder 69, can carry out respectively transporting and carrying, convenient in therefore transporting and carrying.For ensureing that connector 70 and longitudinal spandrel girder 69 can be well on assembled at the scene, in prefabrication process, by connector 70 together with the cage of reinforcement assembled in advance of longitudinal spandrel girder, then pouring concrete can be carried out to longitudinal spandrel girder, to ensure quality of fit.Except scene carry out assembled except, the railway roadbed substrate precast plate shown in its application process with Figure 40, Figure 45 is substantially identical, in this no longer repeated description
Can be found out by above-described embodiment, in construction method of the present invention, the grouping of railway roadbed substrate precast plate of the present invention can the actual conditions long according to plate set, concrete can be set to one group by adjacent two pieces of railway roadbed substrate precast plates of the present invention, also can be continuous print three pieces, four pieces of even more railway roadbed substrate precast plates of the present invention are set to one group, good effect can be realized.Be noted that the present invention compose a piece of writing described in longitudinal direction, corresponding with the bearing of trend of rail; Described transverse direction, corresponding with the transverse direction of rail.In addition, the present invention is not limited to above-described embodiment application, and based on the know-why of narrating herein, related art scheme also can cross-reference, all in the protection domain of application claims.
Claims (20)
1. a railway roadbed substrate precast plate, it is characterized in that comprising by the prefabricated plate body of Reinforced Concrete Materials, the size of plate body is less than the design size of substrate, and plate body is provided with at least three height and inclination-angle regulating device.
2. railway roadbed substrate precast plate according to claim 1, it is characterized in that height and inclination-angle regulating device comprise the anchoring piece with plate body integrated setting, anchoring piece is provided with the screwed hole and screw rod that cooperatively interact.
3. railway roadbed substrate precast plate according to claim 1, is characterized in that the middle part of plate body upper surface is provided with gutter.
4. railway roadbed substrate precast plate according to claim 1, is characterized in that plate body is provided with grouting channel.
5. railway roadbed substrate precast plate according to claim 1, it is characterized in that plate body comprises longitudinal spandrel girder and connector, longitudinal spandrel girder arranges two altogether, arranges at least one connector between two longitudinal spandrel girders.
6. railway roadbed substrate precast plate according to claim 5, is characterized in that the upper surface in the middle part of connector is fixedly installed the disposable template corresponding with gutter shape.
7. railway roadbed substrate precast plate according to claim 5, is characterized in that connector is made up of steel bar framework or shape.
8. railway roadbed substrate precast plate according to claim 5, is characterized in that at least longitudinal spandrel girder, concrete intensity is not less than the concrete prescribed strength of C40.
9. railway roadbed substrate precast plate according to claim 1, is characterized in that plate body lower surface is carried out dabbing process or is provided with concaveconvex structure.
10. railway roadbed substrate precast plate according to claim 1, is characterized in that in plate body, concrete intensity is not less than the concrete prescribed strength of C40.
11. railway roadbed substrate precast plates according to claim 1, is characterized in that plate body upper surface flatness error is less than 2mm/m
2.
12. railway roadbed substrate precast plates according to claim 1, is characterized in that plate body being arranged at least one loss of weight through hole.
13. 1 kinds of application rights require the railway roadbed substrate that in 1-12, described in arbitrary claim, railway roadbed substrate precast plate is constructed, it is characterized in that the end face of railway roadbed substrate precast plate plate body overlaps with the design work face of substrate, fill concrete closely knit in space between plate body and ballast bed structure base surface or grouting material, the upper surface of concrete or grouting material filling part is not higher than plate body end face.
14. railway roadbed substrates according to claim 13, is characterized in that the intensity of concrete or grouting material is not less than the concrete prescribed strength of C30.
15. 1 kinds of application rights require that in 1-12, described in arbitrary claim, railway roadbed substrate precast plate constructs the construction method of railway roadbed substrate, is characterized in that comprising the steps:
(1) clean out the foreign material on ballast bed structure base surface, according to the requirement of engineering drawing, rule on the ballast bed structure base surface of job site according to disjunction mark of laying a railway track and identify the plan-position of railway roadbed substrate precast plate;
(2) prefabricated railway roadbed substrate precast plate is transported to job site, and is contrasted the relevant position of ruling and being placed on ballast bed structure base surface;
(3) according to the requirement of engineering drawing, with reference to the disjunction mark of laying a railway track pre-set in ballast bed structure, by measurement mechanism, adjusted height and the gradient of railway roadbed substrate precast plate plate body by height and inclination-angle regulating device, the end face of plate body is overlapped with the design work face of this place's substrate;
(4) with reference to plate body end face, concrete perfusion or grouting material in the space between plate body and ballast bed structure base surface, until fill closely knit completely, make the upper surface of new perfusion part not higher than plate body upper surface;
(5) construction and installation of other railway roadbed substrate precast plate are completed according to aforesaid operations method;
(6) maintenance and protection are carried out to the concrete newly poured into or grouting material part, until it reaches design strength, namely obtain finally complete substrate.
16. according to construction method described in claim 15, it is characterized in that in step (2), adjacent at least two pieces of railway roadbed substrate precast plates being set as one group, then respectively height is carried out to all railway roadbed substrate precast plates in same group and the gradient adjusts, again to concrete perfusion or grouting material in the space in same group between each block railway roadbed substrate precast plate and ballast bed structure base surface, until fill closely knit completely, to divide into groups according to aforesaid operations method the construction and installation of each group railway roadbed substrate precast plate, finally maintenance is carried out to new perfusion part, until it reaches design strength, namely finally complete substrate is obtained.
17. according to construction method described in claim 15, it is characterized in that in step (3), after height and the gradient of plate body adjust, again carries out accurate adjustment to the position of plate body.
18. according to construction method described in claim 15, and when it is characterized in that concrete perfusion or grouting material in step (4), adopting can the concrete of Self-leveling or grouting material, or adopts the method for filling of slip casing by pressure.
19. according to construction method described in claim 18, it is characterized in that, when adopting the method for filling of slip casing by pressure, plate body arranging counterweight.
20. according to construction method described in claim 15, it is characterized in that according to requirement of engineering, before step (1) is cleared up the foreign material on ballast bed structure base surface, first does surperficial dabbing process to ballast bed structure base surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210327998.7A CN103669114B (en) | 2012-09-06 | 2012-09-06 | Ballast bed base prefabricated slab and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210327998.7A CN103669114B (en) | 2012-09-06 | 2012-09-06 | Ballast bed base prefabricated slab and application thereof |
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| CN103669114A CN103669114A (en) | 2014-03-26 |
| CN103669114B true CN103669114B (en) | 2015-07-22 |
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