CN110725162A - Roadbed device for rail transit and manufacturing method - Google Patents
Roadbed device for rail transit and manufacturing method Download PDFInfo
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- CN110725162A CN110725162A CN201911007998.7A CN201911007998A CN110725162A CN 110725162 A CN110725162 A CN 110725162A CN 201911007998 A CN201911007998 A CN 201911007998A CN 110725162 A CN110725162 A CN 110725162A
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
- E01B2/006—Deep foundation of tracks
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
- E01B29/005—Making of concrete parts of the track in situ
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The utility model provides a road bed device and manufacturing method for track traffic, include as the main part way base member (1), rubble layer body (10) of setting on way base member (1), barricade (11) of setting in the side portion of way base member (1), the side protection device of setting between way base member (1) and barricade (11), through way base member (1) and rubble layer body (10), the support to the guide rail has been realized, through barricade (11) and side protection device, the side that has realized way base member (1) is fixed, consequently, the limit for width of way base member (1) has been realized and has been handled.
Description
Technical Field
The invention relates to a roadbed device, in particular to a roadbed device suitable for high-speed trains and used for rail transit and a manufacturing method.
Background
The roadbed device is used as a support carrier of a guide rail of the rail transit, so that the running safety of a high-speed train is ensured, and therefore the roadbed device and the manufacturing method for the rail transit are important civil engineering components.
The technical scheme of the invention is made based on the technical problems, technical features and technical effects in the technical background of the applicant.
Disclosure of Invention
The object of the invention is a roadbed arrangement for rail traffic,
the invention provides a roadbed manufacturing method for rail transit.
In order to overcome the technical disadvantages, the invention aims to provide a roadbed device for rail transit and a manufacturing method thereof, thereby realizing width limiting treatment on a roadbed.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a road bed device for track traffic, includes the way base member as the main part, sets up rubble layer body on the road bed body, sets up the barricade in the side portion of way base member, sets up the side protection device between road bed body and barricade.
Because the roadbed body, the gravel layer body, the retaining wall and the side protection device are designed, the support of the guide rail is realized through the road base body and the gravel layer body, and the side fixation of the road base body is realized through the retaining wall and the side protection device, so that the width limitation treatment of the road base body is realized.
The invention designs that the roadbed body, the gravel layer body, the retaining wall and the side protection device are mutually connected in an additional side supporting and fixing mode.
The invention designs that the side protection device also comprises a composite geomembrane, a steel wire mesh, an inner filling layer body, an outer filling layer body and an upper filling layer body,
the invention designs that the road foundation also comprises a first accessory device with an impermeable geomembrane and reinforcing steel bars, and the first accessory device is arranged in the road foundation.
The invention contemplates that a second accessory device having a water resistant layer is included and is disposed between the roadbed and the gravel layer.
The invention designs that an anti-seepage geomembrane and a steel bar are respectively arranged in a roadbed body, the side surface part of the roadbed body is respectively provided with a composite geomembrane, a steel wire mesh, an inner filling body, an outer filling body, an upper filling body and a retaining wall, and the outer filling body, the upper filling body and the roadbed body are respectively provided with a waterproof layer body and a gravel layer body.
The invention designs that the roadbed body is arranged into a trapezoid body, an impermeable geomembrane is arranged between the lower end surface part of the roadbed body and a foundation, the roadbed body is arranged to be connected with a steel bar in a holding mode, a waterproof layer body is arranged at the upper end surface part of the roadbed body, a step body is arranged on the side surface part of the roadbed body, the step body of the roadbed body is arranged to be connected with the composite geomembrane in a contact mode, a retaining wall is arranged on the side surface part of the roadbed body, the roadbed body and the retaining wall are arranged at intervals and distributed, and the roadbed body is arranged into a accumulation body of three-.
The invention designs that the anti-seepage geomembrane is connected with the roadbed body in an implanted mode and the anti-seepage geomembrane is distributed along the lower end face part of the roadbed body in an extending mode.
The invention designs that the steel bars are arranged to be connected with the roadbed body in an implanted mode, the steel bars are arranged to extend along the transverse center line of the roadbed body, and the outer end heads of the steel bars are arranged to be connected with the steel wire meshes.
The invention designs that the retaining wall is arranged into a T-shaped strip-shaped body, the end surface part of the lower end of the retaining wall is arranged on the foundation, and the inner side surface part of the retaining wall is respectively connected with the inner filling layer body and the outer filling layer body in a contact mode.
The invention designs that the composite geomembrane is in covering connection with a road foundation body, the composite geomembrane is arranged between a road foundation body and a steel wire mesh, and the composite geomembrane is arranged to extend and distribute along the side surface of the road foundation body.
The invention designs that the steel wire meshes are arranged to be in covering connection with the composite geomembrane, the steel wire meshes are arranged between the composite geomembrane and the inner filling layer body, between the composite geomembrane and the outer filling layer body and between the composite geomembrane and the upper filling layer body, and the steel wire meshes are arranged to extend and distribute along the side surface part of the road matrix.
The invention designs that the inner filling layer body is arranged between the lower end part of the inner side surface of the retaining wall and the steel wire mesh, the upper end surface part of the inner filling layer body is connected with the outer filling layer body in a contact mode, the inner filling layer body is made of light concrete, and the inner filling layer body is made of a coagulation body which is provided with foaming agent aqueous solution and cement paste.
The invention designs that an outer filling layer body is arranged between the upper end part of the inner side surface of a retaining wall and an upper filling layer body, the upper end surface part of the outer filling layer body is connected with a waterproof layer body in a contact mode, the outer filling layer body is arranged to be a high-strength reinforced light concrete body, and the outer filling layer body is arranged to be a coagulation body which is provided with foaming agent aqueous solution, cement paste, 0.4% -0.6% of glass fiber and a wire mesh sheet according to weight proportion.
The invention designs that the upper filling layer body is arranged at the upper end part of the side surface of the road base body, the outer side surface part of the upper filling layer body is connected with the outer filling layer body in a contact mode, the upper end surface part of the upper filling layer body is connected with the waterproof layer body in a contact mode, and the upper filling layer body is set to be a concrete body of C26 concrete.
The invention designs that the lower end surface of the waterproof layer body is connected with the road base body, the outer filling layer body and the upper filling layer body in a covering mode, the upper end surface of the waterproof layer body is connected with the gravel layer body in a contact mode, and the waterproof layer body is made of HDPE impermeable geomembrane coated with polyurethane waterproof paint.
The invention designs that the gravel layer body is arranged to be in covering connection with the waterproof layer body and the gravel layer body is arranged to be a mixture of four grades of crushed stones with the weight ratio of 0-31.5mm and 5% of cement.
The invention designs that a road base body, a gravel layer body, a retaining wall, a composite geomembrane, a steel wire mesh, an inner filling layer body, an outer filling layer body and an upper filling layer body are distributed in a side reinforcement mode, the road base body, the gravel layer body, an anti-seepage geomembrane and a steel bar are distributed in a built-in reinforcement mode, the road base body, the gravel layer body and a waterproof layer body are distributed in an upper end reinforcement mode, the retaining wall, the composite geomembrane, the steel wire mesh, the inner filling layer body, the outer filling layer body and the upper filling layer body form a side reinforcement part, and a plurality of side reinforcement parts are distributed at intervals along the road base body.
The invention designs a roadbed manufacturing method for rail transit, which comprises the following steps: laying an anti-seepage geomembrane on a foundation, stacking a roadbed body on the anti-seepage geomembrane, implanting steel bars into the roadbed body, manufacturing step bodies on the side surfaces of the roadbed body, laying a composite geomembrane on the step bodies of the roadbed body, laying a steel wire mesh on the composite geomembrane, binding the steel wire mesh and the steel bars together, mounting a retaining wall on the side surface of the roadbed body, stirring and mixing a foaming agent aqueous solution and cement slurry to form an inner filling body raw material, injecting the inner filling body raw material into the space between the lower end part of the inner side surface of the retaining wall and the steel wire mesh to form an inner filling body of a condensate, injecting C26 concrete slurry into the upper end of the step bodies of the roadbed body to form an upper filling body of the condensate, stirring and mixing the foaming agent aqueous solution, the cement slurry and 0.4-0.6% glass fiber to form an outer filling body raw material, injecting the outer filling body raw material into the space between the upper end part of the inner side surface of the retaining wall and the upper filling body, meanwhile, a wire mesh sheet is put into raw materials of the outer filling layer body to form the outer filling layer body of the condensation body, a retaining wall, a composite geomembrane, a steel wire mesh, an inner filling layer body, the outer filling layer body and a segmented body of an upper filling layer body are respectively formed along the side surface of the road matrix, the HDPE impermeable geomembrane is immersed into polyurethane waterproof paint to prepare a waterproof layer body, the waterproof layer body is laid on the road matrix, the outer filling layer body and the upper filling layer body, four-level crushing of 0-31.5mm and 5% of cement are stirred and mixed to prepare raw materials of the gravel layer body, and the raw materials of the gravel layer body are laid on the waterproof layer body.
The invention designs that the method comprises the following steps:
treating a substrate, cleaning the anti-seepage geomembrane laid after the maintenance of the lower part of the common lightweight concrete is finished, excavating steps on the existing roadbed, and laying a composite geomembrane;
construction preparation, namely preparing a high-strength lightweight concrete raw material and other items needing preparation before construction according to the requirements of design documents;
the body pouring is carried out, the pouring thickness is 0.6m, the length of a single pouring area of the construction plane along the line direction is divided into 10m pouring areas, the pouring construction time of a single pouring area pouring layer is controlled within the initial setting time of cement paste, the single pouring layer is poured at one time,
covering and maintaining, laying an anti-seepage geomembrane in time for maintaining, and carrying out moisture-keeping and maintaining on the lightweight concrete roadbed.
The invention designs that the method comprises the following steps:
firstly, treating a substrate, collecting and fixing an impermeable geomembrane used for maintaining lower-layer common lightweight concrete to prevent scraping into existing high-speed rails and endangering driving safety, finishing steps of the existing high-speed rail foundations, cleaning floating soil and sundries to ensure that the height of the steps reaches 60cm, then laying a composite geomembrane, ensuring that the composite geomembrane is closely attached to a roadbed surface, the lap joint width is not less than 30cm, connecting and reinforcing existing high-speed rail side slope phi 25 reinforcing steel bars, requiring anti-rust treatment, driving into the existing line side slope with the length of 1.0m, exposing the existing line side slope with the length of 1.0m and the spacing of the reinforcing steel bars to be 1.0m, and arranging the connecting reinforcing steel bars in a quincunx shape in the construction range of the lower-layer common lightweight concrete,
secondly, construction preparation, namely preparing raw materials, such as cement, a foaming agent, water, glass fiber and the like, which are required by the high-strength lightweight concrete and qualified for detection; the galvanized steel wire mesh with the diameter of 1mm multiplied by 10mm adopts lap joint connection; the outer mold is erected and firmly reinforced according to the measurement and positioning on site,
thirdly, body pouring is carried out, the pouring thickness is 0.6m, a single pouring area of a construction plane is divided into 10m pouring areas along the line direction, the pouring construction time of the pouring layer of the single pouring area is controlled within the initial setting time of cement paste, the single pouring layer is poured at one time, the pouring of the single pouring area is carried out along the line direction from one end to the other end, if more than one pouring pipe is adopted for pouring, the pouring can be carried out from one end side by side, a discharge port is embedded into the lightweight concrete during pouring, during the pouring process, when the pouring pipe needs to be moved, the pouring pipe needs to be moved back and forth along the placing direction of the pouring pipe, the pouring pipe is not moved left and right, if the pouring pipe needs to be moved left and right, the pouring pipe needs to be lifted out of the surface of the currently poured lightweight concrete and then moved again for sweeping the surface, the pouring pipe is lifted out of the surface of the poured lightweight concrete and the pouring port is kept horizontal, and the distance between the pouring opening and the surface of the currently poured lightweight concrete is as low as possible, the lap joint width is not less than 10cm when the steel wire mesh is laid, the steel wire mesh is firmly bound by adopting binding wires, the distance between adjacent binding points is not more than 3 times of the side length of the mesh,
and fourthly, covering and maintaining, namely laying an anti-seepage geomembrane in time for maintenance, carrying out moisture-keeping maintenance on the lightweight concrete roadbed, and carrying out next step of water prevention and drainage and surface layer construction of the foundation bed when the strength of a maintenance test piece of the high-strength reinforced lightweight concrete under the same condition is not lower than 0.6 MPa.
The invention designs that the method comprises the following steps:
firstly, treating a base, collecting and fixing an impermeable geomembrane used for maintaining lower-layer common lightweight concrete to prevent adjacent existing high-speed rails from being scraped to endanger driving safety, finishing steps of a roadbed of a newly-built station, clearing away floating soil and sundries and ensuring that the height of the steps reaches 60cm, then laying a composite geomembrane, and ensuring that the width of the closely-adhered lap joint of the composite geomembrane and a roadbed surface is not less than 30cm because of the existence of a retaining wall on the outer side and no connecting steel bar is needed to be used at the lap joint part of the composite geomembrane and the roadbed.
Secondly, construction preparation, namely preparing raw materials, such as cement, a foaming agent, water, glass fiber and the like, which are required by the high-strength lightweight concrete and qualified for detection; filling the lacing wire holes of the outer retaining wall during construction with a foaming agent to avoid slurry leakage, adopting lap joint for the galvanized steel wire mesh with phi 1mm multiplied by 10mm,
and thirdly, body pouring, wherein the pouring thickness is 0.6m, a single pouring area of the construction plane is divided into the pouring areas according to the length of 10m in the line direction, the pouring construction time of the single pouring area pouring layer is controlled within the initial setting time of cement paste, the single pouring layer is poured at one time, the single pouring area is poured from one end to the other end in the line direction, and if more than one pouring pipe is adopted for pouring, the pouring can be started from one end side by side. When pouring, the discharge port is embedded in the lightweight concrete, when the pouring pipe needs to be moved, the pouring pipe is moved back and forth along the placing direction of the pouring pipe, but the pouring pipe is not suitable to be moved left and right, if the pouring pipe needs to be moved left and right, the pouring pipe is lifted out of the surface of the currently poured lightweight concrete and then moved, when the surface is swept, the pouring pipe is lifted out of the surface of the poured lightweight concrete, the pouring opening is kept horizontal as much as possible, the distance between the pouring opening and the surface of the currently poured lightweight concrete is as low as possible, the lap joint width is not less than 10cm when the steel wire mesh is laid, the binding wires are adopted for binding and fixing, the distance between adjacent binding points is not more than 3 times of the side length,
and fourthly, covering and maintaining, namely laying an anti-seepage geomembrane in time for maintenance, carrying out moisture-keeping maintenance on the lightweight concrete roadbed, and carrying out next step of water prevention and drainage and surface layer construction of the foundation bed when the strength of a maintenance test piece of the high-strength reinforced lightweight concrete under the same condition is not lower than 0.6 MPa.
The invention has the technical effects that: the lightweight concrete has the characteristics of light weight, fluidity, strength adjustability and self-support after solidification, and is a novel lightweight material on a railway, wherein a foaming agent aqueous solution is prepared into foam by a physical method, then the foam is added into cement slurry to form foam slurry, the foam slurry is pumped to a filling area by a long distance and is hardened by physical and chemical actions, and closed foam holes are formed in the foam slurry. The weight is between 250kg/m3 and 1650kg/m3, the strength is between 0.4MPa and 7.5MPa, and the engineering adopts light concrete as the construction material for introducing the side filling into the upper and lower connecting lines of the Kyoho. The weight range is 650kg/m 3-850 kg/m3, and the strength is 1.0MPa (common light soil) and 1.6MPa (high-strength reinforced light soil). Compared with the common AB group filler, the weight is reduced by 2.6 to 3.4 times, and the additional settlement caused by the side filling can be effectively reduced. The light concrete of the project is divided into common light concrete and high-strength light concrete, and specific indexes are shown in table 1.
TABLE 1 index of light concrete roadbed engineering actual measurement project
Preparing high-strength reinforced lightweight concrete: the light concrete is prepared by mixing compressed air with foaming agent water solution to form foam, adding 0.4-0.6% of glass fiber, and strictly stirring to foam. The lightweight concrete preparation equipment has the function of automatically metering raw materials, the flow rate of cement paste or foam can be adjusted when the lightweight concrete is prepared by mixing, the equipment is required to set a stable foaming ratio to generate foam with standard foam density, and the trial-matching strength is required to reach 1.05 times of the designed strength. The stirring time is ensured to be uniform, the components are stirred for not less than 120s at normal temperature, and a lightweight concrete test is carried out, wherein a field test is carried out before the lightweight concrete is poured to determine whether the lightweight concrete meets the design requirements. The items of examination are shown in Table 2
Pouring high-strength reinforced lightweight concrete: the high-strength reinforced lightweight concrete is positioned on the uppermost layer of the bottom layer of the foundation bed, the thickness of the high-strength reinforced lightweight concrete is 60cm, and the pouring is performed in a subarea mode. The length of a single construction plane pouring area along the line direction is divided into pouring areas according to 10m, the pouring construction time of a single pouring area pouring layer is controlled within the initial setting time of cement paste, the single pouring layer is poured at one time, a galvanized steel wire mesh is paved in high-strength reinforced lightweight concrete and is positioned 0.3m below the top surface, the used steel wires meet the existing regulation of general purpose low-carbon steel wires (YB/T5294), the galvanizing grade is not lower than grade B, the type is phi 1mm multiplied by 10mm, the tensile strength of the galvanized steel wires is not less than 380N/mm, reliable fixing and lap joint quantity is ensured, and a discharge port is not prone to be suspended in the air in the pouring process of the high-strength reinforced lightweight concrete. When the pouring pipe is moved, the sample is taken from the discharge port, the surface is swept flat or the redundant foam in the pouring area needs to be dispersed, the height difference between the discharge port and the current lightweight concrete flowing surface is preferably controlled within 1m, and the high-strength reinforced lightweight concrete is cured: after pouring is completed, the anti-seepage geomembrane is laid in time for maintenance, if the anti-seepage geomembrane cannot be laid in time, a plastic film or a needle-punched geotextile is adopted for surface covering so as to carry out moisturizing maintenance on the lightweight concrete roadbed, the lightweight concrete roadbed can be uncovered until the front of the next lightweight concrete construction, large-scale mechanical operation is not needed, and the adjacent camp construction is safe and reliable: need not large-scale machinery when the adjacent business line group of jinghu high-speed railway of advancing fills out the construction, adjacent operation risk level straight line reduces, can 24 hours operation after setting up hard isolation measure on business line edge, and safety control work load is little, and business line safe operation coefficient is high, realizes remote transport, and degree of automation is high: the lightweight concrete has the advantages of light weight, fluidity and the like, only a cement foaming machine is needed to be used in construction to realize automatic operation, the horizontal pumping can be realized at a distance of 400 m for long-distance transportation, the construction speed is high, and the construction period is saved: the construction speed of filling the roadbed by adopting the lightweight concrete is high, and no matter which type of filler is adopted in the filling section, one layer is generally filled in one day. The pouring height of each layer of light soil is 0.6m, and the efficiency is doubled compared with that of the common roadbed slope filling of each layer by 0.3 m; each integrated mixing station with automatic metering can produce about 2000m of filling materials every day, the quantity of the integrated mixing stations with the corresponding quantity is prepared according to the size of a working face on site, the requirements of continuous operation can be met, the filling materials are light in weight, and the additional settlement to the high-speed rail of Jinghush is reduced:
the wet density of the high-strength reinforced lightweight concrete is 750-850 kg/m3, the unconfined compressive strength is not lower than 1.6MPa, the deformation resistance is strong, the compression amount of the high-strength reinforced lightweight concrete is extremely small after the high-strength reinforced lightweight concrete is subjected to side filling forming, and almost no settlement exists after the high-strength reinforced lightweight concrete is subjected to side filling on a rigid foundation. The light material is adopted, so that the additional settlement caused to the existing roadbed is small; simultaneously, the additional settlement of the subgrade adjacent to the line is small, energy-saving construction is achieved, and the green construction concept is met: the light concrete filling construction only needs an integrated mixing station, and the energy consumption is low due to pipeline transportation. The site is matched with a manual erecting template, so that the operation of a transport vehicle, a land leveler, a bulldozer and a road roller of the traditional roadbed is not needed, and the concept of green environmental protection engineering is met: compared with the traditional material filling, the lightweight concrete filling construction process has no dust, noise and vibration in the construction process, and has little influence on the surrounding environment; the required raw materials are cement and a foaming agent, the foaming agent is neutral and does not contain harmful substances such as benzene, formaldehyde and the like, the environmental pollution and fire-fighting hidden danger are avoided, and the environment-friendly foaming agent is green and environment-friendly.
In the technical scheme, the road base body, the gravel layer body, the retaining wall and the side protection device which are additionally supported and fixed by the side faces are important technical characteristics, and the roadbed device and the manufacturing method for the rail transit have novelty, creativity and practicability in the technical field.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Figure 1 is a schematic view of a roadbed arrangement for rail transit,
road matrix-1, anti-seepage geomembrane-2, reinforcing steel bar-3, composite geomembrane-4, steel wire mesh-5, inner filling layer-6, outer filling layer-7, upper filling layer-8, waterproof layer-9, gravel layer-10 and retaining wall-11.
Detailed Description
Terms such as "having," "including," and "comprising," as used with respect to the present invention, are to be understood as not specifying the presence or addition of one or more other elements or combinations thereof, in accordance with the examination guidelines.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other, and further, unless otherwise specified, the equipments and materials used in the following examples are commercially available, and if the processing conditions are not explicitly specified, please refer to the commercially available product specifications or follow the conventional method in the art.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a first embodiment of the present invention, and in conjunction with the accompanying drawings, specifically illustrates this embodiment, and includes a road base 1, an impermeable geomembrane 2, reinforcing steel bars 3, a composite geomembrane 4, a steel wire mesh 5, an inner filling body 6, an outer filling body 7, an upper filling body 8, a waterproof layer 9, a gravel layer 10, and a retaining wall 11, wherein the impermeable geomembrane 2 and the reinforcing steel bars 3 are respectively disposed in the road base 1, the composite geomembrane 4, the steel wire mesh 5, the inner filling body 6, the outer filling body 7, the upper filling body 8, and the retaining wall 11 are respectively disposed on a side surface of the road base 1, and the waterproof layer 9 and the gravel layer 10 are respectively disposed on the outer filling body 7, the upper filling body 8, and the road base 1.
In this embodiment, the roadbed 1 is provided with a trapezoidal body and the impermeable geomembrane 2 is arranged between the lower end face part of the roadbed 1 and the foundation, the roadbed 1 is provided with a holding type connection with the steel bars 3 and the waterproof layer body 9 is arranged on the upper end face part of the roadbed 1, the side face part of the roadbed 1 is provided with a step body and the step body of the roadbed 1 is arranged to be connected with the composite geomembrane 4 in a contact manner, the side face part of the roadbed 1 is provided with a retaining wall 11 and the roadbed 1 and the retaining wall 11 are arranged to be distributed at intervals, and the roadbed 1 is provided with a accumulation body of the three-joint soil.
Through way base member 1, formed the support tie point to prevention of seepage geomembrane 2, reinforcing bar 3, compound geomembrane 4, waterproof layer body 9 and barricade 11, by road base member 1, realized being connected with prevention of seepage geomembrane 2, realized being connected with reinforcing bar 3, realized being connected with compound geomembrane 4, realized being connected with waterproof layer body 9, realized being connected with barricade 11, its technical aim at: for serving as a support carrier for the gravel pack 10.
In this embodiment, the impermeable geomembrane 2 is configured to be coupled with the roadbed 1 in an implanted manner and the impermeable geomembrane 2 is configured to extend along the lower end face of the roadbed 1.
Through prevention of seepage geomembrane 2, formed the support tie point to road matrix 1, by prevention of seepage geomembrane 2, realized being connected with road matrix 1, its technical aim at: used for the anti-seepage treatment of the road matrix 1.
In the embodiment, the steel bars 3 are configured to be coupled with the road matrix 1 in an implanted manner, the steel bars 3 are configured to extend along the transverse center line of the road matrix 1, and the outer ends of the steel bars 3 are configured to be coupled with the steel wire mesh 5.
Through reinforcing bar 3, formed the support tie point to way base member 1 and wire net 5, by reinforcing bar 3, realized being connected with road bed body 1, realized being connected with wire net 5, its technical aim at: for reinforcing the road base 1.
In this embodiment, the retaining wall 11 is provided as a T-shaped strip and the lower end surface of the retaining wall 11 is provided on the foundation, and the inner side surfaces of the retaining wall 11 are respectively provided in contact with the inner infill 6 and the outer infill 7.
Through barricade 11, formed the support tie point to the internal filling body of layer 6 and the external filling body of layer 7, by barricade 11, realized being connected with the internal filling body of layer 6, realized being connected with the external filling body of layer 7, its technical aim at: for serving as a support carrier for the inner and outer filling layers 6, 7.
In the embodiment, the composite geomembrane 4 is arranged to be in covering connection with the road matrix 1, the composite geomembrane 4 is arranged between the road matrix 1 and the steel wire mesh 5, and the composite geomembrane 4 is arranged to extend and distribute along the side face part of the road matrix 1.
Through compound geomembrane 4, formed the support tie point to road base member 1 and wire net 5, by compound geomembrane 4, realized being connected with road base member 1, realized being connected with wire net 5, its technical aim at: for reinforcing the side surface of the roadbed 1.
In the present embodiment, the steel wire mesh 5 is arranged to be coveredly coupled with the composite geomembrane 4 and the steel wire mesh 5 is arranged between the composite geomembrane 4 and the inner filling body 6, between the composite geomembrane 4 and the outer filling body 7, and between the composite geomembrane 4 and the upper filling body 8, and the steel wire mesh 5 is arranged to extend along the side surface of the road matrix 1.
Through wire net 5, formed the support tie point to compound geomembrane 4, the interior body of filling 6, the outer body of filling 7 and the upper body of filling 8, by wire net 5, realized being connected with compound geomembrane 4, realized being connected with the interior body of filling 6, realized being connected with the outer body of filling 7, realized being connected with the upper body of filling 8, its technical aim at: for reinforcing the side surface of the roadbed 1.
In this embodiment, the inner filling layer body 6 is disposed between the lower end portion of the inner side surface of the retaining wall 11 and the steel wire mesh 5 and the upper end surface portion of the inner filling layer body 6 is disposed in contact with the outer filling layer body 7, the inner filling layer body 6 is disposed as a lightweight concrete body and the inner filling layer body 6 is disposed as a coagulated body having a foaming agent aqueous solution and cement paste.
Through the intussuseption layer body 6, formed the support tie point to wire net 5, outer filling layer body 7 and barricade 11, by intussuseption layer body 6, realized being connected with wire net 5, realized being connected with outer filling layer body 7, realized being connected with barricade 11, its technical purpose lies in: for reinforcing the side surface of the roadbed 1.
In this embodiment, the external filling body 7 is disposed between the upper end portion of the inner side surface of the retaining wall 11 and the upper filling body 8 and the upper end surface portion of the external filling body 7 is disposed to be in contact-type coupling with the waterproof layer body 9, the external filling body 7 is disposed to be a high-strength reinforced lightweight concrete body and the external filling body 7 is disposed to be a coagulated body having a foaming agent aqueous solution, cement paste, 0.4% to 0.6% of glass fiber and a wire mesh sheet in a weight ratio.
Through outer filling layer body 7, formed the support tie point to last filling layer body 8, waterproof layer body 9 and barricade 11, by outer filling layer body 7, realized with last filling layer body 8's connection, realized with waterproof layer body 9's connection, realized with barricade 11's connection, its technical aim at: for reinforcing the side surface of the roadbed 1.
In the present embodiment, the upper filler 8 is provided at the upper end portion of the side surface of the road base body 1 and the outer side surface portion of the upper filler 8 is provided in contact coupling with the outer filler 7, the upper end surface portion of the upper filler 8 is provided in contact coupling with the waterproof layer member 9 and the upper filler 8 is provided as a concrete of C26 concrete.
Through filling up the layer body 8 on, formed the support tie point to way base member 1, outer body 7 and the waterproof layer body 9 of filling up, by filling up the layer body 8 on, realized being connected with the road base member 1, realized being connected with the waterproof layer body 9, realized being connected with outer body 7 of filling up, its technical aim at: for reinforcing the side surface of the roadbed 1.
In this embodiment, the lower end surface of the waterproof sheet member 9 is disposed to be coveringly coupled with the road body 1, the outer filler 7 and the upper filler 8 and the upper end surface of the waterproof sheet member 9 is disposed to be in contact with the crushed stone member 10, and the waterproof sheet member 9 is disposed to be an HDPE impermeable geomembrane coated with a polyurethane waterproof paint.
Through waterproof layer body 9, formed the support tie point to way base member 1, outer filling layer body 7, upper filling layer body 8 and rubble layer body 10, by waterproof layer body 9, realized with road base member 1's connection, realized with upper filling layer body 8's connection, realized with outer filling layer body 7's connection, realized with rubble layer body 10's connection, its technical aim at: for reinforcing the upper end surface portion of the road base 1.
In this embodiment, the crushed stone layer 10 is covered and connected with the waterproof layer 9 and the crushed stone layer 10 is provided with a mixture of four-grade crushed stone and 5% cement according to the weight ratio of 0-31.5 mm.
Through the rubble layer body 10, formed the support tie point to waterproof layer body 9, by rubble layer body 10, realized being connected with waterproof layer body 9, its technical aim at: for supporting the carrier to the rail.
In this embodiment, the roadbed 1, the gravel layer 10, the retaining wall 11, the composite geomembrane 4, the steel wire mesh 5, the inner filling layer 6, the outer filling layer 7 and the upper filling layer 8 are arranged to be distributed in a lateral reinforcement manner, the roadbed 1, the gravel layer 10, the impermeable geomembrane 2 and the steel bars 3 are arranged to be distributed in a built-in reinforcement manner, the roadbed 1, the gravel layer 10 and the waterproof layer 9 are arranged to be distributed in an upper reinforcement manner, the retaining wall 11, the composite geomembrane 4, the steel wire mesh 5, the inner filling layer 6, the outer filling layer 7 and the upper filling layer 8 are arranged to form a section of lateral reinforcement part, and the lateral reinforcement parts are arranged to be distributed at intervals along the roadbed 1.
In one of the first embodiment of the present invention, the outer infill 7 is disposed between the upper end portion of the inner side surface of the retaining wall 11 and the upper infill 8 and the upper end surface portion of the outer infill 7 is disposed in contact with the waterproof layer 9, the outer infill 7 is disposed as a high-strength reinforced lightweight concrete body and the outer infill 7 is disposed as a coagulated body having a foaming agent aqueous solution, cement paste, 0.4% of glass fiber and a mesh sheet in a weight ratio. In this embodiment, the crushed stone layer 10 is provided to be coveringly coupled with the waterproof layer 9 and the crushed stone layer 10 is provided to have a mixture of four grades of crushed stone and 5% cement in a weight ratio.
In the third embodiment of the present invention, the outer filling body 7 is disposed between the upper end portion of the inner side surface of the retaining wall 11 and the upper filling body 8 and the upper end surface portion of the outer filling body 7 is disposed to be in contact-type coupling with the waterproof layer body 9, the outer filling body 7 is disposed as a high-strength reinforced lightweight concrete body and the outer filling body 7 is disposed as a coagulated body having a foaming agent aqueous solution, cement paste, 0.6% of glass fiber and a wire mesh sheet in a weight ratio. In this embodiment, the crushed stone layer 10 is provided to be coveringly coupled with the waterproof layer 9 and the crushed stone layer 10 is provided to have a mixture of four-grade crushed stone of 31.5mm by weight and 5% cement.
In the fourth embodiment of the present invention, the external filling body 7 is disposed between the upper end portion of the inner side surface of the retaining wall 11 and the upper filling body 8 and the upper end surface portion of the external filling body 7 is disposed to be in contact-type coupling with the waterproof layer body 9, the external filling body 7 is disposed as a high-strength reinforced lightweight concrete body and the external filling body 7 is disposed as a coagulated body having a foaming agent aqueous solution, cement paste, 0.5% of glass fiber and a mesh sheet in a weight ratio. In this embodiment, the crushed stone layer 10 is provided to be coveringly coupled with the waterproof layer 9 and the crushed stone layer 10 is provided to have a mixture of four-grade crushed stone and 5% cement in a weight ratio of 15 mm.
In the second embodiment of the present invention, the roadbed 1, the rubble layer body 10, the retaining wall 11 and the side protection devices are connected with each other in a manner of additional side supporting fixation.
In this embodiment, the side protection device is configured to further include a composite geomembrane 4, a steel wire mesh 5, an inner filling body 6, an outer filling body 7 and an upper filling body 8,
in this embodiment, a first attachment means with impermeable geomembrane 2 and reinforcing bars 3 is also included and is provided in the roadbed 1.
In this embodiment, a second accessory device having a waterproof layer 9 is further included and is disposed between the roadbed 1 and the gravel layer 10.
A second embodiment of the invention is based on the first embodiment.
The invention is further described below with reference to the following examples, which are intended to illustrate the invention but not to limit it further.
A method for manufacturing a roadbed for rail transit comprises the following steps: laying an anti-seepage geomembrane 2 on a foundation, stacking a roadbed 1 on the anti-seepage geomembrane 2, implanting steel bars 3 into the roadbed 1, manufacturing step bodies on the side surfaces of the roadbed 1, laying a composite geomembrane 4 on the step bodies of the roadbed 1, laying a steel wire mesh 5 on the composite geomembrane 4, binding the steel wire mesh 5 and the steel bars 3 together, installing a retaining wall 11 on the side surface of the roadbed 1, stirring and mixing a foaming agent aqueous solution and cement slurry to form a raw material of an inner filling layer 6, injecting the raw material of the inner filling layer 6 into a space between the lower end part of the inner side surface of the retaining wall 11 and the steel wire mesh 5 to form the inner filling layer 6 of a condensate, injecting C26 concrete slurry into the upper end of the step bodies of the roadbed 1 to form an upper filling layer 8 of the condensate, stirring and mixing the foaming agent aqueous solution, the cement slurry and 0.4-0.6% of glass fibers to form a raw material of an outer filling layer 7, then injecting the raw material of the outer filling layer 7 between the upper end part of the inner side surface of the retaining wall 11 and the upper filling layer 8, simultaneously placing the silk screen sheet into the raw material of the outer filling layer 7 to form the outer filling layer 7 of the condensation body, respectively forming the retaining wall 11, the composite geomembrane 4, the steel wire gauze 5, the inner filling layer 6, the outer filling layer 7 and the segmented body of the upper filling layer 8 along the side surface of the road matrix 1, immersing the HDPE impermeable geomembrane into the polyurethane waterproof coating to prepare a waterproof layer body 9, laying the waterproof layer body 9 on the road matrix 1, the outer filling layer 7 and the upper filling layer 8, stirring and mixing the four-level crushed pieces with the diameter of 0-31.5mm and 5% of cement to prepare the raw material of the crushed stone 10, and laying the raw material of the crushed stone 10 on the waterproof layer 9.
The second embodiment of the present invention comprises the following steps: paving an anti-seepage geomembrane 2 on a foundation, stacking a roadbed 1 on the anti-seepage geomembrane 2, implanting steel bars 3 into the roadbed 1, manufacturing step bodies on the side surfaces of the roadbed 1, paving a composite geomembrane 4 on the step bodies of the roadbed 1, paving a steel wire mesh 5 on the composite geomembrane 4, binding the steel wire mesh 5 and the steel bars 3 together, installing a retaining wall 11 on the side surface of the roadbed 1, stirring and mixing a foaming agent aqueous solution and cement slurry to form an inner filling layer body 6 raw material, then injecting the inner filling layer body 6 raw material into a space between the lower end part of the inner side surface of the retaining wall 11 and the steel wire mesh 5 to form an inner filling layer body 6 of a condensate, injecting C26 concrete slurry into the upper end of the step bodies of the roadbed 1 to form an upper filling layer body 8 of the condensate, stirring and mixing the foaming agent aqueous solution, the cement slurry and 0.4 percent of glass fibers to form an outer filling layer body 7 raw material, then injecting the raw material of the outer filling layer body 7 into the space between the upper end part of the inner side surface of the retaining wall 11 and the upper filling layer body 8, simultaneously placing the silk screen sheet into the raw material of the outer filling layer body 7 to form the outer filling layer body 7 of the condensation body, respectively forming the retaining wall 11, the composite geomembrane 4, the steel wire gauze 5, the inner filling layer body 6, the outer filling layer body 7 and the segmented body of the upper filling layer body 8 along the side surface of the road matrix 1, soaking the HDPE impermeable geomembrane into the polyurethane waterproof coating to prepare a waterproof layer body 9, paving the waterproof layer body 9 on the road matrix 1, the outer filling layer body 7 and the upper filling layer body 8, stirring and mixing the four-grade aggregate and 5% cement to prepare the raw material of the crushed stone layer body 10, and paving the raw material of the crushed stone layer body 10 on the waterproof layer body 9.
In a third embodiment of the present invention, the steps are: paving an anti-seepage geomembrane 2 on a foundation, stacking a roadbed 1 on the anti-seepage geomembrane 2, implanting steel bars 3 into the roadbed 1, manufacturing step bodies on the side surfaces of the roadbed 1, paving a composite geomembrane 4 on the step bodies of the roadbed 1, paving a steel wire mesh 5 on the composite geomembrane 4, binding the steel wire mesh 5 and the steel bars 3 together, installing a retaining wall 11 on the side surface of the roadbed 1, stirring and mixing a foaming agent aqueous solution and cement slurry to form an inner filling layer body 6 raw material, then injecting the inner filling layer body 6 raw material into a space between the lower end part of the inner side surface of the retaining wall 11 and the steel wire mesh 5 to form an inner filling layer body 6 of a condensate, injecting C26 concrete slurry into the upper end of the step bodies of the roadbed 1 to form an upper filling layer body 8 of the condensate, stirring and mixing the foaming agent aqueous solution, the cement slurry and 0.6 percent of glass fibers to form an outer filling layer body 7 raw material, then injecting the raw material of the outer filling layer 7 between the upper end part of the inner side surface of the retaining wall 11 and the upper filling layer 8, simultaneously placing the wire mesh sheet into the raw material of the outer filling layer 7 to form the outer filling layer 7 of the condensate, respectively forming the retaining wall 11, the composite geomembrane 4, the steel wire mesh 5, the inner filling layer 6, the outer filling layer 7 and the segmented body of the upper filling layer 8 along the side surface of the road matrix 1, immersing the HDPE impermeable geomembrane into the polyurethane waterproof coating to prepare a waterproof layer body 9, laying the waterproof layer body 9 on the road matrix 1, the outer filling layer 7 and the upper filling layer 8, stirring and mixing four-level fragments of 31.5mm and 5% of cement to prepare a raw material of a gravel layer body 10, and laying the raw material of the gravel layer body 10 on the waterproof layer body 9.
The fourth embodiment of the present invention comprises the following steps: paving an anti-seepage geomembrane 2 on a foundation, stacking a roadbed 1 on the anti-seepage geomembrane 2, implanting steel bars 3 into the roadbed 1, manufacturing step bodies on the side surfaces of the roadbed 1, paving a composite geomembrane 4 on the step bodies of the roadbed 1, paving a steel wire mesh 5 on the composite geomembrane 4, binding the steel wire mesh 5 and the steel bars 3 together, installing a retaining wall 11 on the side surface of the roadbed 1, stirring and mixing a foaming agent aqueous solution and cement slurry to form a raw material of an inner filling layer 6, injecting the raw material of the inner filling layer 6 into a space between the lower end part of the inner side surface of the retaining wall 11 and the steel wire mesh 5 to form the inner filling layer 6 of a condensate, injecting C26 concrete slurry into the upper end of the step bodies of the roadbed 1 to form an upper filling layer 8 of the condensate, stirring and mixing the foaming agent aqueous solution, the cement slurry and 0.5 percent of glass fibers to form a raw material of an outer filling layer 7, then injecting the raw material of the outer filling layer body 7 into the space between the upper end part of the inner side surface of the retaining wall 11 and the upper filling layer body 8, simultaneously placing the wire mesh sheet into the raw material of the outer filling layer body 7 to form the outer filling layer body 7 of the condensation body, respectively forming the retaining wall 11, the composite geomembrane 4, the steel wire mesh 5, the inner filling layer body 6, the outer filling layer body 7 and the segmented body of the upper filling layer body 8 along the side surface of the road matrix 1, immersing the HDPE impermeable geomembrane into the polyurethane waterproof coating to prepare a waterproof layer body 9, laying the waterproof layer body 9 on the road matrix 1, the outer filling layer body 7 and the upper filling layer body 8, stirring and mixing four-grade fragments of 15mm and 5% of cement to prepare a raw material of a crushed stone layer body 10, and laying the raw material of the crushed stone body 10 on the waterproof layer body 9.
The fifth embodiment of the present invention comprises the following steps:
firstly, treating a substrate, collecting and fixing an impermeable geomembrane used for maintaining lower-layer common light concrete so as to prevent scraping into existing high-speed rails and endangering driving safety, carrying out step finishing and floating soil and sundries cleaning on the existing high-speed railway foundation to ensure that the height of the step reaches 60cm, then laying a composite geomembrane 2, ensuring that the composite geomembrane 2 is closely attached to a roadbed surface, the lap joint width is not less than 30cm, connecting and reinforcing steel bars 3 with high-speed railway side slopes phi 25 are connected and reinforced, the reinforcing steel bars 3 require rust-proof treatment, arranging ribs HRB400 reinforcing steel bars 3 with ribs, the length of the reinforcing steel bars 3 being 2.0m, driving the reinforcing steel bars into the existing railway side slopes 1.0m, exposing 1.0m, and arranging the reinforcing steel bars 3 with the interval of 1.0m in a quincunx shape with connecting reinforcing steel,
secondly, construction preparation, namely preparing raw materials, such as cement, a foaming agent, water, glass fiber and the like, which are required by the high-strength lightweight concrete and qualified for detection; the galvanized steel wire mesh with the diameter of 1mm multiplied by 10mm adopts lap joint connection; the outer mold is erected and firmly reinforced according to the measurement and positioning on site,
thirdly, body pouring is carried out, the pouring thickness is 0.6m, a single pouring area of a construction plane is divided into 10m pouring areas along the line direction, the pouring construction time of the pouring layer of the single pouring area is controlled within the initial setting time of cement paste, the single pouring layer is poured at one time, the pouring of the single pouring area is carried out along the line direction from one end to the other end, if more than one pouring pipe is adopted for pouring, the pouring can be carried out from one end side by side, a discharge port is embedded into the lightweight concrete during pouring, during the pouring process, when the pouring pipe needs to be moved, the pouring pipe needs to be moved back and forth along the placing direction of the pouring pipe, the pouring pipe is not moved left and right, if the pouring pipe needs to be moved left and right, the pouring pipe needs to be lifted out of the surface of the currently poured lightweight concrete and then moved again for sweeping the surface, the pouring pipe is lifted out of the surface of the poured lightweight concrete and the pouring port is kept horizontal, and the distance between the pouring opening and the surface of the currently poured lightweight concrete is as low as possible, the lap joint width is not less than 10cm when the steel wire mesh is laid, the steel wire mesh is firmly bound by adopting binding wires, the distance between adjacent binding points is not more than 3 times of the side length of the mesh,
and fourthly, covering and maintaining, namely laying an anti-seepage geomembrane in time for maintenance, carrying out moisture-keeping maintenance on the lightweight concrete roadbed, and carrying out next step of water prevention and drainage and surface layer construction of the foundation bed when the strength of a maintenance test piece of the high-strength reinforced lightweight concrete under the same condition is not lower than 0.6 MPa.
The sixth embodiment of the present invention comprises the following steps:
firstly, treating a substrate, collecting and fixing an impermeable geomembrane used for maintaining lower-layer common lightweight concrete to prevent adjacent existing high-speed rails from being scraped to endanger driving safety, finishing steps of a roadbed of a newly-built station, clearing away floating soil and sundries and ensuring that the height of the steps reaches 60cm, then laying a composite geomembrane 2, and ensuring that the width of the closely-adhered lap joint of the composite geomembrane 2 and a roadbed surface is not less than 30cm because of the existence of a retaining wall 11 at the outer side and the lap joint of the composite geomembrane and the roadbed does not need to use a connecting steel bar.
Secondly, construction preparation, namely preparing raw materials, such as cement, a foaming agent, water, glass fiber and the like, which are required by the high-strength lightweight concrete and qualified for detection; filling the lacing wire holes of the outer retaining wall during construction with a foaming agent to avoid slurry leakage, adopting lap joint for the galvanized steel wire mesh with phi 1mm multiplied by 10mm,
and thirdly, body pouring, wherein the pouring thickness is 0.6m, a single pouring area of the construction plane is divided into the pouring areas according to the length of 10m in the line direction, the pouring construction time of the single pouring area pouring layer is controlled within the initial setting time of cement paste, the single pouring layer is poured at one time, the single pouring area is poured from one end to the other end in the line direction, and if more than one pouring pipe is adopted for pouring, the pouring can be started from one end side by side. When pouring, the discharge port is embedded in the lightweight concrete, when the pouring pipe needs to be moved, the pouring pipe is moved back and forth along the placing direction of the pouring pipe, but the pouring pipe is not suitable to be moved left and right, if the pouring pipe needs to be moved left and right, the pouring pipe is lifted out of the surface of the currently poured lightweight concrete and then moved, when the surface is swept, the pouring pipe is lifted out of the surface of the poured lightweight concrete, the pouring opening is kept horizontal as much as possible, the distance between the pouring opening and the surface of the currently poured lightweight concrete is as low as possible, the lap joint width is not less than 10cm when the steel wire mesh is laid, the binding wires are adopted for binding and fixing, the distance between adjacent binding points is not more than 3 times of the side length,
and fourthly, covering and maintaining, namely laying an anti-seepage geomembrane in time for maintenance, carrying out moisture-keeping maintenance on the lightweight concrete roadbed, and carrying out next step of water prevention and drainage and surface layer construction of the foundation bed when the strength of a maintenance test piece of the high-strength reinforced lightweight concrete under the same condition is not lower than 0.6 MPa.
The invention has the following characteristics:
1. because the roadbed body 1, the gravel layer body 10, the retaining wall 11 and the side protection device are designed, the support of the guide rail is realized through the roadbed body 1 and the gravel layer body 10, and the side fixation of the roadbed body 1 is realized through the retaining wall 11 and the side protection device, so that the width limitation treatment of the roadbed body 1 is realized.
2. Due to the design of the composite geomembrane 4, the steel wire mesh 5, the inner filling body 6, the outer filling body 7 and the upper filling body, light weight treatment is realized, and the roadbed of the existing rail transit is prevented from being settled.
3. The impervious geomembrane 2, the reinforcing steel bars 3 and the waterproof layer body 9 are designed to reinforce the road matrix 1.
4. Because the structural shape is limited by the numerical range, the numerical range is the technical characteristic of the technical scheme of the invention, and is not the technical characteristic obtained by formula calculation or limited tests, and tests show that the technical characteristic of the numerical range achieves good technical effect.
5. Due to the design of the technical characteristics of the invention, tests show that each performance index of the invention is at least 1.7 times of the existing performance index under the action of the single and mutual combination of the technical characteristics, and the invention has good market value through evaluation.
Other technical features associated with the additional side supporting and fixing road base 1, the rubble layer 10, the retaining wall 11 and the side protecting device are all one of the embodiments of the present invention, and the technical features of the above-mentioned embodiments can be combined arbitrarily, and in order to meet the requirements of patent laws, patent practice rules and examination guidelines, all possible combinations of the technical features of the above-mentioned embodiments will not be described.
The above embodiment is only one implementation form of the roadbed device and the manufacturing method for rail transit provided by the invention, and other modifications of the scheme provided by the invention, such as adding or reducing components or steps therein, or applying the invention to other technical fields close to the invention, belong to the protection scope of the invention.
Claims (10)
1. A roadbed device for rail transit and a manufacturing method are characterized in that: comprises a road base body (1) as a main body, a gravel layer body (10) arranged on the road base body (1), a retaining wall (11) arranged on the side surface part of the road base body (1), and a side protection device arranged between the road base body (1) and the retaining wall (11).
2. The roadbed device for rail transit as claimed in claim 1, wherein: the roadbed body (1), the gravel layer body (10), the retaining wall (11) and the side protection device are mutually connected in an additional side supporting and fixing mode.
3. The roadbed device for rail transit as claimed in claim 1, wherein: the side protection device is also provided with a composite geomembrane (4), a steel wire mesh (5), an inner filling body (6), an outer filling body (7) and an upper filling body (8),
or, a first attachment device with an impermeable geomembrane (2) and a reinforcing steel bar (3) is also included and arranged in the roadbed (1),
or, a second accessory device with a waterproof layer body (9) is also included and is arranged between the road base body (1) and the gravel layer body (10).
4. A roadbed apparatus for rail transit as claimed in claim 3, wherein: the road matrix (1) is respectively provided with an anti-seepage geomembrane (2) and a reinforcing steel bar (3), the side surface part of the road matrix (1) is respectively provided with a composite geomembrane (4), a steel wire mesh (5), an inner filling body (6), an outer filling body (7), an upper filling body (8) and a retaining wall (11), and the outer filling body (7), the upper filling body (8) and the road matrix (1) are respectively provided with a waterproof layer body (9) and a gravel layer body (10).
5. The roadbed device for rail transit as claimed in claim 4, wherein: the roadbed is characterized in that the roadbed base body (1) is arranged into a trapezoid body, an anti-seepage geomembrane (2) is arranged between the lower end surface part of the roadbed base body (1) and a foundation, the roadbed base body (1) is arranged to be in accommodation connection with the steel bars (3) and a waterproof layer body (9) is arranged at the upper end surface part of the roadbed base body (1), the side surface part of the roadbed base body (1) is provided with step bodies, the step bodies of the roadbed base body (1) are arranged to be in contact connection with the composite geomembrane (4), the side surface part of the roadbed base body (1) is provided with retaining walls (11), the roadbed base body (1) and the retaining walls (11) are arranged at intervals and distributed, the roadbed base body (,
or the gravel layer body (10) is arranged to be connected with the waterproof layer body (9) in a covering way and the gravel layer body (10) is arranged to be a mixture of four-grade crushed materials with the weight ratio of 0-31.5mm and 5% of cement,
or the retaining wall (11) is arranged into a T-shaped strip-shaped body, the end surface part of the lower end of the retaining wall (11) is arranged on the foundation, and the inner side surface part of the retaining wall (11) is respectively arranged into contact connection with the inner filling layer body (6) and the outer filling layer body (7).
6. The roadbed device for rail transit as claimed in claim 4, wherein: the anti-seepage geomembrane (2) is arranged to be connected with the road matrix (1) in an implanted way, the anti-seepage geomembrane (2) is arranged to extend and distribute along the lower end surface part of the road matrix (1),
or the reinforcing steel bars (3) are arranged to be connected with the road matrix (1) in an implanted manner, the reinforcing steel bars (3) are arranged to extend along the transverse center line of the road matrix (1), the outer ends of the reinforcing steel bars (3) are arranged to be connected with the steel wire mesh (5),
or the lower end face part of the waterproof layer body (9) is connected with the road base body (1), the outer filling layer body (7) and the upper filling layer body (8) in a covering mode, the upper end face part of the waterproof layer body (9) is connected with the gravel layer body (10) in a contact mode, and the waterproof layer body (9) is made of HDPE impermeable geomembrane coated with polyurethane waterproof coating.
7. The roadbed device for rail transit as claimed in claim 4, wherein: the composite geomembrane (4) is arranged to be in covering connection with the road matrix (1), the composite geomembrane (4) is arranged between the road matrix (1) and the steel wire mesh (5), the composite geomembrane (4) is arranged to extend and distribute along the side surface part of the road matrix (1),
or the steel wire meshes (5) are connected with the composite geomembrane (4) in a covering mode, the steel wire meshes (5) are arranged between the composite geomembrane (4) and the inner filling body (6), between the composite geomembrane (4) and the outer filling body (7) and between the composite geomembrane (4) and the upper filling body (8), the steel wire meshes (5) are arranged to extend and distribute along the side face of the road matrix (1),
or the inner filling layer body (6) is arranged between the lower end part of the inner side surface of the retaining wall (11) and the steel wire mesh (5), the upper end surface part of the inner filling layer body (6) is connected with the outer filling layer body (7) in a contact way, the inner filling layer body (6) is made of light concrete, the inner filling layer body (6) is made of a coagulation body with foaming agent aqueous solution and cement paste,
or the outer filling body (7) is arranged between the upper end part of the inner side surface of the retaining wall (11) and the upper filling body (8), the upper end surface part of the outer filling body (7) is connected with the waterproof layer body (9) in a contact way, the outer filling body (7) is arranged to be a high-strength reinforced lightweight concrete body, the outer filling body (7) is arranged to be a coagulation body which is provided with foaming agent aqueous solution, cement paste, 0.4-0.6% of glass fiber and silk screen sheet according to the weight proportion,
or the upper filling layer body (8) is arranged at the upper end part of the side surface of the road base body (1), the outer side surface part of the upper filling layer body (8) is connected with the outer filling layer body (7) in a contact mode, the upper end surface part of the upper filling layer body (8) is connected with the waterproof layer body (9) in a contact mode, and the upper filling layer body (8) is set to be a C26 concrete condensation body.
8. A roadbed apparatus for rail transit as claimed in any one of claims 1 to 9 and a method of making thereof, wherein: road base member (1) and rubble layer body (10) and barricade (11), compound geomembrane (4), wire net (5), the intussuseption layer body (6), the intussuseption layer body (7) and the upper padding layer body (8) set up to distribute according to the mode of side reinforcement and road base member (1) and rubble layer body (10) and prevention of seepage geomembrane (2) and reinforcing bar (3) set up to distribute according to built-in reinforced mode, road base member (1) and rubble layer body (10) and waterproof layer body (9) set up to distribute according to the mode of upper end reinforcement, a barricade (11), one section compound geomembrane (4), one section wire net (5), one section intussuseption layer body (6), one section intussuseption layer body (7) and one section upper padding layer body (8) set up to form one section side reinforcement part and the multistage side reinforcement part sets up to following road base member (1) interval arrangement.
9. A roadbed manufacturing method for rail transit is characterized by comprising the following steps: the method comprises the following steps: paving an anti-seepage geomembrane (2) on a foundation, stacking a road matrix (1) on the anti-seepage geomembrane (2), implanting steel bars (3) into the road matrix (1), manufacturing a step body on the side surface of the road matrix (1), laying a composite geomembrane (4) on the step body of the road matrix (1), laying a steel wire mesh (5) on the composite geomembrane (4), binding the steel wire mesh (5) and the steel bars (3), installing a retaining wall (11) on the side surface of the road matrix (1), stirring and mixing a foaming agent aqueous solution and cement slurry to form a raw material of an inner filling layer body (6), injecting the raw material of the inner filling layer body (6) into the space between the lower end part of the inner side surface of the retaining wall (11) and the steel wire mesh (5) to form an inner filling body (6) of a condensation body, injecting C26 concrete slurry into the upper end of the step body of the road matrix (1) to form an upper filling body (8) of the condensation body, stirring and mixing a foaming agent aqueous solution, cement paste and 0.4-0.6% of glass fiber to form an outer filling layer body (7) raw material, then injecting the outer filling layer body (7) raw material into a space between the upper end part of the inner side surface of a retaining wall (11) and an upper filling layer body (8), simultaneously placing a wire mesh sheet into the outer filling layer body (7) raw material to form an outer filling layer body (7) of a condensation body, respectively forming the retaining wall (11), a composite geomembrane (4), a steel wire mesh (5), an inner filling layer body (6), the outer filling layer body (7) and a subsection body of the upper filling layer body (8) along the side surface of a road matrix (1), soaking an HDPE impervious film into polyurethane waterproof coating to prepare a waterproof layer body (9), laying the waterproof layer body (9) on the road matrix (1), the outer filling layer body (7) and the upper filling layer body (8), stirring and mixing 0-31.5mm of the earthwork impervious film and 5% of cement to prepare a crushed stone (10) raw material, the raw material of the gravel layer body (10) is paved on the waterproof layer body (9).
10. The method for fabricating a roadbed for rail transit according to claim 9, wherein:
the method comprises the following steps: treating a substrate, cleaning the anti-seepage geomembrane laid after the maintenance of the lower part of the common lightweight concrete is finished, excavating steps on the existing roadbed, laying a composite geomembrane,
construction preparation, namely preparing a high-strength lightweight concrete raw material and other items needing preparation before construction according to the requirements of design documents,
the body pouring is carried out, the pouring thickness is 0.6m, the length of a single pouring area of the construction plane along the line direction is divided into 10m pouring areas, the pouring construction time of a single pouring area pouring layer is controlled within the initial setting time of cement paste, the single pouring layer is poured at one time,
covering and maintaining, laying anti-seepage geomembrane for maintaining in time, moisturizing and maintaining the lightweight concrete roadbed,
or, the steps are:
firstly, base treatment, namely collecting and fixing an impermeable geomembrane used for maintaining lower-layer common lightweight concrete to prevent scraping into existing high-speed rails and endangering driving safety, carrying out step finishing and floating soil and sundries cleaning on the existing high-speed rail foundations to ensure that the step height reaches 60cm, then laying a composite geomembrane (2), ensuring that the composite geomembrane (2) is closely attached to a roadbed surface, the lap width is not less than 30cm, connecting and reinforcing existing high-speed rail side slope phi 25 reinforcing steel bars (3), requiring rust prevention treatment on the reinforcing steel bars (3), arranging ribbed HRB400 reinforcing steel bars (3), wherein the length of the reinforcing steel bars (3) is 2.0m, the existing line side slope is 1.0m, the exposed part is 1.0m, the spacing between the reinforcing steel bars is 1.0m, and the connecting reinforcing steel bars (3) in the construction range of the lower-layer common lightweight concrete are arranged in a quincun,
secondly, construction preparation, namely preparing raw materials, such as cement, a foaming agent, water, glass fiber and the like, which are required by the high-strength lightweight concrete and qualified for detection; the galvanized steel wire mesh with the diameter of 1mm multiplied by 10mm adopts lap joint connection; the outer mold is erected and firmly reinforced according to the measurement and positioning on site,
thirdly, body pouring is carried out, the pouring thickness is 0.6m, a single pouring area of a construction plane is divided into 10m pouring areas along the line direction, the pouring construction time of the pouring layer of the single pouring area is controlled within the initial setting time of cement paste, the single pouring layer is poured at one time, the pouring of the single pouring area is carried out along the line direction from one end to the other end, if more than one pouring pipe is adopted for pouring, the pouring can be carried out from one end side by side, a discharge port is embedded into the lightweight concrete during pouring, during the pouring process, when the pouring pipe needs to be moved, the pouring pipe needs to be moved back and forth along the placing direction of the pouring pipe, the pouring pipe is not moved left and right, if the pouring pipe needs to be moved left and right, the pouring pipe needs to be lifted out of the surface of the currently poured lightweight concrete and then moved again for sweeping the surface, the pouring pipe is lifted out of the surface of the poured lightweight concrete and the pouring port is kept horizontal, and the distance between the pouring opening and the surface of the currently poured lightweight concrete is as low as possible, the lap joint width is not less than 10cm when the steel wire mesh is laid, the steel wire mesh is firmly bound by adopting binding wires, the distance between adjacent binding points is not more than 3 times of the side length of the mesh,
fourthly, covering and curing, laying an anti-seepage geomembrane in time for curing, carrying out moisture-preserving curing on the light concrete roadbed, carrying out next step of water-proof and drainage and roadbed surface construction when the strength of a cured test piece of the high-strength reinforced light concrete under the same condition is not lower than 0.6MPa,
or, the steps are:
firstly, base treatment, namely collecting and fixing the anti-seepage geomembrane used for curing the lower layer of common lightweight concrete so as to prevent the anti-seepage geomembrane from being scraped into the adjacent existing high-speed rail to endanger the driving safety, trimming the steps of the roadbed of the newly-built station, cleaning the floating soil and sundries to ensure that the height of the steps reaches 60cm, then laying the composite geomembrane (2), wherein the close adhesion and lap joint width of the composite geomembrane (2) and the roadbed is not less than 30cm, and because the retaining wall (11) is arranged on the outer side, the lap joint part of the composite geomembrane and the roadbed does not need,
secondly, construction preparation, namely preparing raw materials, such as cement, a foaming agent, water, glass fiber and the like, which are required by the high-strength lightweight concrete and qualified for detection; filling the lacing wire holes of the outer retaining wall during construction with a foaming agent to avoid slurry leakage, adopting lap joint for the galvanized steel wire mesh with phi 1mm multiplied by 10mm,
thirdly, body pouring is carried out, the pouring thickness is 0.6m, the length of a single pouring area of a construction plane along the line direction is divided into 10m pouring areas, the pouring construction time of the single pouring area pouring layer is controlled within the initial setting time of cement paste, the single pouring layer is poured at one time, the single pouring area is poured from one end to the other end along the line direction, if more than one pouring pipes are adopted for pouring, the pouring can be carried out from one end side by side,
when pouring, the discharge port is embedded in the lightweight concrete, when the pouring pipe needs to be moved, the pouring pipe is moved back and forth along the placing direction of the pouring pipe, but the pouring pipe is not suitable to be moved left and right, if the pouring pipe needs to be moved left and right, the pouring pipe is lifted out of the surface of the currently poured lightweight concrete and then moved, when the surface is swept, the pouring pipe is lifted out of the surface of the poured lightweight concrete, the pouring opening is kept horizontal as much as possible, the distance between the pouring opening and the surface of the currently poured lightweight concrete is as low as possible, the lap joint width is not less than 10cm when the steel wire mesh is laid, the binding wires are adopted for binding and fixing, the distance between adjacent binding points is not more than 3 times of the side length,
and fourthly, covering and maintaining, namely laying an anti-seepage geomembrane in time for maintenance, carrying out moisture-keeping maintenance on the lightweight concrete roadbed, and carrying out next step of water prevention and drainage and surface layer construction of the foundation bed when the strength of a maintenance test piece of the high-strength reinforced lightweight concrete under the same condition is not lower than 0.6 MPa.
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Inventor after: Qiu Zhijian Inventor after: Xie Jianye Inventor after: Ma Zunguo Inventor after: Yu Qiang Inventor after: Zhao Bo Inventor after: Liu Qijiao Inventor after: Zhang Ruiguang Inventor after: Zhou Yongbo Inventor after: Bi Yanmei Inventor after: Zhang Peihui Inventor after: Huang Xinqiang Inventor before: Qiu Zhijian Inventor before: Yu Qiang Inventor before: Zhao Bo Inventor before: Liu Qijiao Inventor before: Zhang Ruiguang Inventor before: Zhou Yongbo Inventor before: Bi Yanmei Inventor before: Zhang Peihui Inventor before: Huang Xinqiang |
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Effective date of registration: 20200818 Address after: 300000 Tianjin Xiqing District Zhangjiawo Town Tian'an Innovation Science and Technology Industrial Park, District 3, Building 2 Applicant after: CHINA RAILWAY TENTH GROUP EIGHTH PROJECT Co.,Ltd. Applicant after: Lunan High Speed Railway Co., Ltd Address before: 300000 Tianjin Xiqing District Zhangjiawo Town Tian'an Innovation Science and Technology Industrial Park, District 3, Building 2 Applicant before: CHINA RAILWAY TENTH GROUP EIGHTH PROJECT Co.,Ltd. |