CN113699835B - Construction method of integral type turnout drainage structure of railway track bed of cargo yard in port area - Google Patents
Construction method of integral type turnout drainage structure of railway track bed of cargo yard in port area Download PDFInfo
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- CN113699835B CN113699835B CN202111244583.9A CN202111244583A CN113699835B CN 113699835 B CN113699835 B CN 113699835B CN 202111244583 A CN202111244583 A CN 202111244583A CN 113699835 B CN113699835 B CN 113699835B
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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
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/008—Drainage of track
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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
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
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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
- E01B26/00—Tracks or track components not covered by any one of the preceding groups
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B7/00—Switches; Crossings
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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
- E01B7/00—Switches; Crossings
- E01B7/22—Special sleepers for switches or crossings; Fastening means therefor
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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
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/07—Drainage
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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
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/10—Making longitudinal or transverse sleepers or slabs in situ or embedding them
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Railway Tracks (AREA)
Abstract
The invention discloses a construction method of an integral track bed switch area drainage structure of a cargo yard railway in a port area, which comprises a track bed switch area lower structure consisting of a concrete cushion layer and a concrete supporting layer which are sequentially arranged above an existing sand layer foundation and a track bed switch area upper structure consisting of an upper layer of reinforced concrete layer and a lower layer of reinforced concrete layer, wherein a sleeper and a steel rail are paved on the reinforced concrete layer at the lower layer of the track bed switch area upper structure, and a switch turning point rail of the steel rail is connected with a switch machine through a switch machine connector in a switch center switch area; in the outer side track connecting area of the fork core, upper layer reinforced concrete layers of the upper structure are poured on the inner sides, the middle parts and the outer sides of the basic rails of each strand of steel rail; in the turnout point switching area, an upper layer reinforced concrete layer of the upper structure is poured between stock rails of each strand of steel rail and outside the stock rails. The invention reduces the waterproof and drainage range of the turnout area, accelerates the drainage speed, avoids clogging and increases the transport section and the transport capacity of the freight yard in the harbor area by specially processing the turnout area of the partially integrated type track bed.
Description
Technical Field
The invention relates to the technical field of drainage construction of railway traffic turnout areas, in particular to a construction method of an integral turnout area drainage structure of a railway bed of a cargo yard in a harbor area.
Background
In a rail transit line, each set of turnouts needs to be provided with a switch machine, the switch machine is fixed on the outer side of a stock rail, and a pull rod of the switch machine needs to penetrate through the stock rail downwards and is connected with a steering switch rail through a connecting piece. When the signal is input to the pulling instruction, the pull rod pulls the switch rail and locks, thereby realizing the switch of the turnout. Therefore, concrete can not be poured between the stock rails, and the phenomenon of water accumulation is easy to generate between the stock rails. The existing integral type roadbed turnout area drainage structure mostly adopts a foundation pit and a drainage pit to form a comprehensive drainage system, but under the special working condition of a railway in a harbor area, the rainfall is large, the impurities of ground flowing water are more, the problems of unsmooth drainage and serious clogging of a drainage channel are easily caused in a conventional drainage system, and further expensive turnout area steel rails are damaged, and the service life of the turnout area steel rails is seriously influenced.
Disclosure of Invention
The invention aims to provide a construction method of an integral type turnout area drainage structure of a railway of a cargo yard in a harbor area, so as to solve the technical problem in the background technology.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a construction method of an integral track bed and switch area drainage structure of a port area freight yard railway comprises a track bed and switch area lower structure and a track bed and switch area upper structure, wherein the track bed and switch area lower structure comprises a C15 concrete cushion layer and a C30 concrete supporting layer which are sequentially arranged above an existing sand layer foundation, the track bed and switch area upper structure comprises an upper layer of reinforced concrete layer and a lower layer of reinforced concrete layer, sleepers and steel rails are paved on the C40 reinforced concrete layer of the lower layer of the track bed and switch area upper structure, and switch turning switch rails of the steel rails are connected with a switch machine through a switch machine connector in a switch center switch area;
in a turnout junction area outside the turnout center, an upper C30 reinforced concrete layer of the upper structure of the turnout area of the railway bed is poured on the inner side, between the inner side and the outer side of the basic rails of each strand of steel rail, the top surface of the turnout area is flush with the top surface of the steel rail, and a wheel rim groove is reserved on the part of the turnout area close to the inner side of the steel rail;
in the turnout junction switching area, an upper C30 reinforced concrete layer of an upper structure of the turnout area of the track bed is poured between stock rails and outside of each strand of steel rail, the top surface of the upper layer of the reinforced concrete layer is flush with the top surface of the steel rail, and an upper C30 reinforced concrete layer is not poured inside the stock rails of each strand of steel rail to form an adjusting space for sliding of turnout steering switch rails and a switch machine connector;
the construction method comprises the following steps:
step one, constructing an integral type roadbed turnout area drainage structure foundation, excavating to a designed elevation after an existing concrete pavement is broken, carrying out a foundation bearing capacity test, determining a field roadbed bearing load value, a filling change requirement and a filling depth, compacting after filling change if filling change is needed, and directly compacting an existing sand layer foundation if filling change is not needed;
constructing a lower structure of the drainage structure of the integrated turnout area of the railway bed, sequentially constructing a C15 concrete cushion layer and a C30 concrete supporting layer, and paving a drainage pipe in a turnout point area;
thirdly, constructing an upper structure lower layer C40 reinforced concrete layer of the drainage structure of the integrated track bed turnout area, binding reinforcing bars of the upper structure lower layer C40 reinforced concrete layer, laying sleepers and steel rails and anchoring the sleepers and the steel rails by fasteners, installing a point switch and finely adjusting the elevation of the track surface of the turnout by a support frame, and pouring upper structure lower layer C40 concrete after the designed elevation is reached;
constructing an upper structure upper layer C30 reinforced concrete layer of a track connecting area outside the turnout center of the drainage structure of the integrated turnout zone, binding reinforcing bars of the upper structure upper layer C30 reinforced concrete layer, reserving and protecting fastener positions on two sides of the steel rail, and pouring upper structure upper layer C30 concrete on the inner side, between and outside the basic rails of each strand of steel rail;
constructing an upper structure upper layer C30 reinforced concrete layer of the turnout center switching area of the drainage structure of the integral type turnout area, binding reinforcing bars of the upper structure upper layer C30 reinforced concrete layer, reserving and protecting the positions of fasteners outside the steel rails, and pouring upper structure upper layer C30 concrete between basic rails of each strand of steel rails and outside the basic rails;
step six, constructing a capillary type permeable and drainage belt in a turnout point switching area of the drainage structure of the integral type turnout area of the track bed, installing a capillary water collection pipe between sleepers in the turnout point switching area and communicating with a drainage pipe reserved at the bottom, installing plugs at the two initial ends of the capillary water collection pipe and covering the capillary water collection pipe with a permeable rice-stone layer wrapped by permeable geotextile;
constructing an asphalt mortar protective belt, wrapping and protecting two sides of basic rails of a turnout junction area of a drainage structure of the turnout area of the integral track bed and the outer sides of the basic rails of the turnout junction area by using rubber jackets, then pouring asphalt mortar to form the asphalt mortar protective belt, and paying attention to the arrangement and protection of a wheel edge groove on the inner side of a steel rail;
step eight, constructing supporting facilities of the drainage structure of the integral type turnout area of the track bed, constructing a cable trench on the right side of the drainage structure of the integral type turnout area of the track bed and cover plate trenches on the left side and the right side, and communicating the cover plate trenches with correspondingly arranged drainage pipes to form a drainage system of a turnout center switching area;
step nine, recovering construction of the road surfaces on the left side and the right side of the drainage structure of the integrated turnout area of the track bed;
step ten, formally putting the integrated type turnout area drainage structure into operation after the integrated type turnout area drainage structure is maintained in place.
Preferably, lay in the basic rail outside of switch center switch area and lay in the inside and outside both sides of the basic rail in switch center outside switch area and all lead to long and be provided with the asphalt mortar boundary belt, including the fastener of asphalt mortar boundary belt will fix the basic rail seals, and the fastener outside parcel has the isolation layer of rubber overcoat form, sets up asphalt mortar boundary belt top surface and rail top surface parallel and level in the basic rail outside, and set up at the inboard asphalt mortar boundary belt top surface of basic rail and wheel flange groove set up the elevation unanimous, the asphalt mortar boundary belt can effectively protect switch district rail to avoid damaging, and only need simple heating to demolish when later maintenance, the isolation layer of rubber overcoat form has effectively prevented the fastener bullet strip from being concretied in asphalt mortar simultaneously, solved switch district rail protection in earlier stage and the problem that later maintenance is difficult to compromise.
Preferably, capillary type water permeating and draining belts are arranged between sleepers in a switch area of the turnout center and comprise capillary water collecting pipes arranged in parallel to the sleepers in the turnout area, two ends of each capillary water collecting pipe are blocked, the middle parts of the capillary water permeating and draining pipes are communicated with each other through a tee joint, the upper parts of the capillary water permeating and draining belts are covered and protected by a water permeating rice stone layer wrapped by water permeating geotextile, the top surfaces of the water permeating rice stone layers are flush with the top surface of a lower C40 reinforced concrete layer of an upper structure of the turnout area of the railway bed, the water draining pipes are embedded in the lower C40 reinforced concrete layer of the upper structure of the turnout area of the railway bed below the capillary water collecting pipes, and the tail ends of the water permeating and cable ditches beside the railway bed and extending into cover plate ditches or directly extending into the cover plate ditches.
Preferably, water-retaining kerbs are arranged on the outer sides of cover plate ditches on two sides of the switch point area of the switch point, and are arranged in the whole length of the switch point area of the switch point along the line extending direction, so that external rainwater is reduced from flowing into an unhardened area (switch machine control range) of an upper structure of the integrated track bed switch drainage structure, and the risk of collision damage of external vehicles to the switch machine is reduced.
Preferably, the bottom of the rim groove is provided with a drainage longitudinal slope inclined towards a switch point area, so that accumulated water in the rim groove is smoothly drained to an unhardened area, and siltation is prevented.
Preferably, the capillary water collecting pipe comprises a central water collecting pipe and a capillary water draining belt fixedly attached to the outer wall of the water collecting pipe, a plurality of capillary grooves arranged in parallel with the axis of the water collecting pipe are formed in the capillary water draining belt according to an annular array, one side, far away from the axis of the water collecting pipe, of each capillary groove is provided with a capillary groove communicated with the outside, the capillary grooves form water sucking notches in the outer wall of the capillary water draining belt, the capillary grooves, the water sucking notches form water sucking and draining channels with large inside and small outside and in an omega shape on the cross section of the capillary water collecting pipe, and accumulated water sequentially enters the capillary grooves through the water sucking notches and the capillary grooves under the action of capillary water pressure.
Preferably, the capillary catchment pipe is laid towards two sides by taking the center of the bifurcation as a separation point, drainage cross slopes inclined towards the cover plate water channels on two sides are correspondingly arranged respectively, each section of the capillary catchment pipe is arranged according to 50-100cm and is assembled into a whole through a connector, the connector is in a connecting sleeve form, the inner diameter of the connector is matched with the outer diameter of the capillary catchment pipe, clamping grooves are arranged in the middle of the inner side of the connector according to an annular array, the clamping grooves connect and fix the capillary catchment pipes on two sides and form a butt joint gap between the capillary catchment pipes, the butt joint gap is communicated with the capillary groove holes of the capillary catchment pipes and the inner space of the catchment pipes, water in the capillary groove holes is guaranteed to flow into the catchment pipes, meanwhile, a drainage path is shortened, and drainage is accelerated. Water near the capillary drainage belt is discharged by the source continuously under the action of capillary water pressure and negative pressure siphoning in capillary grooves, so that the drainage efficiency is greatly improved.
Compared with the prior art, the invention has the beneficial effects that:
1. the turnout junction area outside the control range of the switch machine is sealed by the upper C30 reinforced concrete layer, and the hardening treatment is carried out on the turnout area of the partially integrated type switch bed, so that the waterproof and drainage range of the turnout area is reduced, and the steam transportation section and the transportation capacity of a freight yard in a harbor area are increased;
2. according to the invention, the capillary water collecting pipe capable of forming a capillary water permeable and drainage belt is arranged in the switch point area in the switch point control range of the switch point area, and the water permeable rice-stone layer wrapped by the water permeable geotextile is adopted for covering and protecting, so that a special drainage system is formed and communicated with the drainage side ditch, the smooth drainage of the unhardened range (the switch point area) of the switch point area is ensured, and the silting is avoided;
3. according to the invention, the rubber jacket is adopted to wrap the fastener elastic strip, and then asphalt mortar is used for hardening two sides of the turnout steel rail, so that the steel rail and the fastener in a hardening area are protected from being affected by rainwater immersion, and the later maintenance is facilitated;
4. according to the invention, the water retaining curb stones are arranged outside the cover plate ditches on two sides of the switch area of the turnout center, so that external rainwater is reduced to flow into the unhardened area (the control range of the switch machine) of the upper structure of the turnout, and the risk of collision damage of external vehicles to the switch machine is reduced.
Drawings
The above and/or other aspects and advantages of the present invention will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are meant to be illustrative, not limiting of the invention, and in which:
FIG. 1 is a plan layout view of an integrated turnout area drainage structure of a railway in a cargo yard in a harbor area, according to the present invention;
FIG. 2 is a schematic longitudinal section structure diagram of an integrated turnout area drainage structure of a railway in a cargo yard in a harbor area, according to the present invention;
FIG. 3 is a schematic cross-sectional structure view of a drainage structure of an integrated track bed turnout area of a harbor area freight yard railway in a turnout point switching area, according to the present invention;
FIG. 4 is a schematic cross-sectional structure view of a turnout area junction area of an integrated turnout bed drainage structure of a cargo yard railway in a harbor area at the outer side of a turnout core, according to the invention;
FIG. 5 is a schematic structural view of a capillary permeable and draining belt of a drainage structure of an integrated track bed turnout area of a cargo yard in a harbor area according to the present invention;
FIG. 6 is a schematic structural diagram of a capillary water collecting pipe and a capillary water discharging pipe of a water discharging structure of an integrated track bed turnout area of a harbor cargo yard according to the present invention;
FIG. 7 is a schematic structural view of a capillary water collecting pipe of a drainage structure of an integrated turnout zone of a railway in a cargo yard in a harbor zone;
FIG. 8 is a schematic cross-sectional view of a capillary water collecting pipe of a drainage structure of an integrated turnout zone of a railway in a cargo yard in a harbor area according to the present invention;
fig. 9 is a cross section partial enlarged structure schematic diagram of a capillary water collecting pipe of a port area freight yard railway integral type turnout area drainage structure.
Reference numerals: 1-existing sand bed foundation, 2-concrete cushion layer, 3-concrete supporting layer, 4-reinforced concrete layer, 5-sleeper, 6-stock rail, 7-fastener, 8-asphalt mortar protective tape, 9-wheel rim groove, 10-sealing angle steel, 11-settlement joint, 12-concrete pavement layer, 13-graded broken stone stabilizing layer, 14-backfill sand bed layer, 15-drainage pipe, 16-cable trench, 17-cover plate ditch, 18-turnout turning point rail, 19-switch machine connector, 20-switch machine, 21-capillary catchment pipe, 22-permeable millstone layer, 23-permeable geotextile, 24-water retaining curb, 25-connector, 26-plug, 27-catchment pipe, 28-capillary drainage belt, 29-capillary hole, 30-capillary groove, 31-water absorption notch.
Detailed Description
Hereinafter, an embodiment of a construction method of a drainage structure of an integrated turnout section of a railway track bed in a harbor cargo yard according to the present invention will be described with reference to the accompanying drawings. The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "longitudinal", "lateral", and the like 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 referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structures of the various elements of the embodiments of the invention. Like reference numerals are used to denote like parts.
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention. Preferred embodiments of the present invention are described in further detail below with reference to FIGS. 1-9:
as shown in fig. 1-4, a preferred integrated track bed and switch area drainage structure of a harbor area freight yard railway of the present invention comprises a track bed and switch area substructure composed of a C15 concrete cushion layer 2, a C30 concrete supporting layer 3, and a track bed and switch area superstructure composed of upper and lower reinforced concrete layers 4, which are sequentially arranged above an existing sand layer foundation 1, wherein sleepers 5 and steel rails are laid on the lower C40 reinforced concrete layer 4 of the track bed and switch area superstructure, and switch turning switch rails 18 of the steel rails are connected with a switch machine 20 through a switch machine connector 19 in a switch area;
in a turnout junction area outside the turnout junction, an upper C30 reinforced concrete layer 4 of the upper structure of the turnout junction of the railway bed is poured inside, between and outside stock rails 6 of each strand of steel rail, the top surface of the reinforced concrete layer is flush with the top surface of the stock rails 6, a wheel edge groove 9 is reserved at the part of the reinforced concrete layer close to the inside of the stock rails 6, and a drainage longitudinal slope inclined towards the turnout junction area is arranged at the bottom of the wheel edge groove 9;
in the turnout junction area, the upper C30 reinforced concrete layer 4 of the upper structure of the turnout area of the track bed is poured between and outside the stock rails 6 of each strand of steel rail, the top surface of the upper C30 reinforced concrete layer is flush with the top surfaces of the stock rails 6, and the inner sides of the stock rails 6 of each strand of steel rail are not poured with the upper C30 reinforced concrete layer 4 to form an adjusting space for sliding of the turnout turning switch rail 18 and the switch machine connector 19;
asphalt mortar protective belts 8 are arranged on the outer side of a stock rail 6 paved on a switch area of a fork center and the inner side and the outer side of the stock rail 6 paved on a switch area of the outer side of the fork center in a whole length manner, the asphalt mortar protective belts 8 seal fasteners 7 for fixing the stock rail 6, rubber jacket type isolation layers are wrapped on the outer sides of the fasteners 7, the top surfaces of the asphalt mortar protective belts 8 arranged on the outer sides of the stock rail 6 are flush with the top surface of the stock rail 6, and the top surfaces of the asphalt mortar protective belts 8 arranged on the inner side of the stock rail 6 are consistent with the set elevation of wheel edge grooves 9;
the outer sides of the cover plate ditches 17 on the two sides of the switch area of the switch center are provided with water-retaining curb stones 24, the water-retaining curb stones 24 are arranged in the switch area of the switch center along the extending direction of the line, and capillary water permeable and drainage belts are arranged between the sleepers 5 in the switch area of the switch center as shown in fig. 5-9, each capillary water permeable and drainage belt comprises a capillary water collecting pipe 21 arranged parallel to the sleepers 5 of the switch area, the two ends of each capillary water collecting pipe 21 are blocked, the middle part of each capillary water collecting pipe 21 is communicated with a drainage pipe 15 through a tee joint, a water permeable rice stone layer 22 wrapped by geotextile 23 covers and protects the capillary water permeable rice stone layer 22, the top surface of the water permeable rice stone layer 22 is flush with the top surface of the lower C40 reinforced concrete layer 4 of the upper structure of the switch area of the railway bed, the drainage pipe 15 is embedded in the lower C40 reinforced concrete layer 4 of the upper structure of the switch area of the railway bed below the capillary water collecting pipe 21, and the tail ends of the drainage pipe extend into the cover plate ditches 17, the capillary water collecting pipe 21 comprises a central water collecting pipe 27 and a capillary water draining belt 28 fixedly attached to the outer wall of the water collecting pipe 27, a plurality of capillary groove holes 29 arranged in parallel with the axis of the water collecting pipe 27 are formed in the capillary water draining belt 28 according to an annular array, one side, away from the axis of the water collecting pipe 27, of each capillary groove hole 29 is provided with a capillary groove 30 communicated with the outside, the capillary groove 30 forms a water sucking notch 31 on the outer wall of the capillary water draining belt 28, the capillary groove holes 29, the capillary grooves 30 and the water sucking notch 31 form a water sucking and draining channel with a large inside and a small outside and a shape like an omega on the cross section of the capillary water collecting pipe 21, the capillary water collecting pipe 21 is laid towards two sides by taking a branch area center as a separation point and is respectively and correspondingly provided with water draining cross slopes inclined towards the cover plate water ditches 17 on two sides, each section of the capillary water collecting pipe is arranged according to 50-100cm and is assembled into a whole through a joint 25, the joint 25 is in a connecting sleeve form, the inner diameter of the capillary water collecting pipe 21 is matched with the outer diameter of the capillary water collecting pipe 21, the middle part of the inner side of the capillary water collecting pipe is provided with clamping grooves according to an annular array, the clamping grooves connect and fix the capillary water collecting pipes 21 on two sides and form a butt joint gap between the capillary water collecting pipes 21 and the clamping grooves, and the butt joint gap is communicated with the capillary groove holes 29 of the capillary water collecting pipes 21 and the inner space of the water collecting pipes 27.
The construction method of the integrated track bed turnout area drainage structure of the port area freight yard railway comprises the following steps:
step one, constructing an integral type roadbed and turnout area drainage structure foundation, determining the position of an integral type roadbed in a newly-built harbor area freight yard railway turnout area according to design information, cutting, dismantling and cleaning an existing concrete pavement (the width of the integral type roadbed is 2.8-5.6 m, the width of the left side expanded excavation is 1.5m, and the width of the right side expanded excavation is 2.5 m) at a corresponding paying-off position, excavating to a design elevation, carrying out a substrate bearing capacity test on an existing sand layer foundation 1 to determine whether the replacement and filling depth are needed, compacting after the replacement if the replacement is needed, and directly compacting the existing sand layer foundation 1 if the replacement is not needed;
step two, constructing a lower structure of the drainage structure of the integrated track bed turnout area, setting up a template on site, pouring concrete of the lower structure of the drainage structure (2.8-5.6 m wide) of the integrated track bed turnout area, pouring a first C15 concrete cushion layer 2 with the thickness of 5cm, pouring a second C30 concrete support layer 3 with the thickness of 20cm, paving a bottom drainage pipe 15 (the diameter is 10cm, the length is consistent with the turnout sleeper and the setting direction is parallel to the turnout sleeper) in a turnout center switching area, and communicating a vertical drainage pipe 15 (the diameter is 10 cm) and an upper drainage pipe 15 (the diameter is 20cm, the length is consistent with the turnout sleeper and the setting direction is parallel to the turnout sleeper) by a connecting device;
step three, constructing an upper structure lower layer C40 reinforced concrete layer 4 of the drainage structure of the integrated railway bed turnout area, firstly binding reinforcing bars of the upper structure lower layer C40 reinforced concrete layer 4 (17-33 longitudinal reinforcing bars with the diameter of 20mm are arranged below the concrete sleeper 5 at intervals of 200mm, 1 transverse reinforcing bar with the diameter of 20mm is arranged below the concrete at intervals of 200 mm), laying a new precast concrete sleeper 5 and a turnout steel rail row and anchoring the new precast concrete sleeper 5 and the turnout steel rail row by using a fastener 7, installing a point switch 20 and finely adjusting the rail surface elevation of the turnout rail row by using a support frame, and pouring upper structure lower layer C40 concrete with the thickness of 29.8cm after reaching the designed elevation;
step four, constructing an upper structure upper layer C30 reinforced concrete layer 4 of a track connecting area outside a turnout center of a drainage structure of an integral track bed turnout area, firstly binding reinforcing bars (longitudinal reinforcing bars with the diameter of 12mm are arranged on the inner side of a steel rail for 8-16 pieces and the interval of 150 mm) of the upper structure upper layer C30 reinforced concrete layer 4, respectively arranging 1 layer of transverse reinforcing bars with the interval of 150mm and the diameter of 12mm on the outer side of the steel rail, then arranging templates (the distance from the steel rail is 13 cm) on two sides of the turnout steel rail, separating the turnout steel rail and a fastener 7 from the upper structure upper layer reinforced concrete layer 4 area, pouring upper structure upper layer C30 concrete with the thickness of 22.3cm on the inner side, the middle side and the outer side of a basic rail 6 of each strand of the steel rail until the top surface of the upper structure upper layer C30 concrete is flush with the top surface of the steel rail, before pouring the concrete, arranging 50mm high L-shaped sealing angle steel 10 at the position of 130mm on the inner side of the basic rail and fixing the basic rail by adopting spot welding, after the concrete is poured, attention should be paid to the fact that the closing surface of the concrete surface layer needs to be bright and the cross slope needs to be smooth, and concrete covering and water spraying maintenance are timely carried out;
fifthly, constructing an upper structure upper layer C30 reinforced concrete layer 4 of the turnout center switching area of the drainage structure of the integral turnout area of the railway track bed, firstly binding an upper structure upper layer C30 reinforced concrete layer 4 reinforcing bars (17-33 longitudinal reinforcing bars with the diameter of 20mm are arranged below the concrete sleeper 5 at the interval of 200mm, and 1 layer of transverse reinforcing bars with the diameter of 20mm is arranged below the concrete at the interval of 200 mm); then, laying new precast concrete sleepers 5 and turnout steel rail panels, finely adjusting the rail surface elevation of the turnout steel rail panels through a support frame, and pouring upper structure upper layer C30 concrete with the thickness of 43.9cm between the basic rails 6 of each strand of steel rail and on the outer side after the design elevation is reached;
step six, constructing a capillary type permeable drainage belt in a turnout switch area of a drainage structure in an integral turnout area of a track bed, firstly, after the lower layer C40 concrete of an upper structure is initially solidified and stabilized in the turnout switch area, removing an upper drainage pipe 15 (the diameter is 20 cm) laid at the upper part, then laying a capillary water collection pipe 21 (the outer diameter is 67mm, the wall thickness of an inner pipe is 2.5mm, the capillary water collection pipe 21 is laid towards two sides by taking the center of the turnout area as a separation point, the transverse gradient of the capillary water collection pipe 21 is 3% -5%, assembling according to the section of 50cm-100cm, realizing that water flow formed by the capillary drainage belt 28 flows into a water collection pipe 27 by adopting a connector 25 in the middle, connecting the capillary water collection pipe 21 in the horizontal direction with a vertical common drainage pipe 15 by adopting a tee joint to enable the capillary water collection pipe and the vertical common drainage pipe to be communicated to form an integral drainage system, then installing plugs 26 at the initial two ends of the capillary water collection pipe 21 to prevent soil or gravel from entering the water collection pipe 27, the upper capillary catchment pipe 21 is covered by a permeable rice-stone layer 22 which is 5cm thick and is wrapped by a water permeable geotextile 23, wherein the rice-stone is commonly known as broken stone with the size of rice grains (5-8 mm), the rice-stone is required to be controlled in particle size, in addition, the dust content is controlled, generally, the content of stone powder with the particle size of less than 0.075mm is not more than 1.0 percent, in the protection construction process of the capillary catchment pipe 21, the rice-stone can be cleaned and sieved firstly for the water drainage effect, and then the water permeable geotextile 23 is wrapped;
seventhly, constructing an asphalt mortar protective belt 8, wrapping and covering fasteners 7 at two sides of the steel rail by using rubber sheets with good flexibility (rubber films with the thickness of 5mm can be purchased or used tires are used for cutting the rubber sheets with the thickness of 5mm and the diameter of 30-35 cm) at two sides of the basic rail 6 at the outer side of the turnout center of the drainage structure of the integral turnout area and at the outer side of the basic rail 6 at the turnout center of the turnout area, firmly binding, then carrying out asphalt mortar crack pouring construction between the upper structure upper layer C30 concrete and the basic rail 6, wherein the mixing ratio of the asphalt mortar (No. 60 petroleum asphalt: quartz powder: quartz sand =1: 2.5: 5.1) is observed, the top surface of the asphalt mortar at the outer side of the steel rail is parallel to the top surface of the steel rail in the pouring process, the asphalt mortar at the inner side of the steel rail is consistent with the elevation of the wheel edge groove 9, the surface of the asphalt mortar is compacted and polished, and a longitudinal slope with the concentration of 1 percent is arranged along the direction of the line, the accumulated water in the wheel rim groove 9 is smoothly discharged to an unhardened area without forming siltation;
step eight, constructing supporting facilities of the drainage structure of the turnout area of the integral type track bed, arranging settlement joints 11 at two sides of the drainage structure of the turnout area of the integral type track bed, sequentially constructing a cable trench 16 (the width is 1.0m and the depth is 0.9 m) and a cover plate ditch 17 (the width is 1.0m and the depth is 1.0 m) at the right side of the drainage structure of the turnout area of the integral type track bed, constructing the cover plate ditch 17 (the width is 1.0m and the depth is 1.0 m) at the left side of the drainage structure of the turnout area of the integral type track bed, arranging a drainage pipe 15 between the cable trench 16 and the cover plate ditch 17 in the range of the turnout area, and communicating the cover plate ditch 17 with a turnout drainage pipe 15 correspondingly arranged in the drainage structure of the turnout area of the integral type track bed to form a central switch area drainage system;
step nine, restoring construction of road surfaces on the left side and the right side of the drainage structure of the integral type turnout zone of the railway track, wherein the width of the restored road surfaces on the two sides is 0.5m, the depth of the restored road surfaces on the two sides is 1.0m, the restored road surfaces comprise a backfilled sand foundation layer 14 which is compacted and is 0.6m thick, a graded broken stone stabilizing layer 13 which is 20cm thick and a C30 concrete pavement layer 12 which is 20cm thick, and prefabricated water-retaining curb stones 24 (the water-retaining curb stone 24 below the ground is 29cm wide in foundation and 20cm high in foundation, and the water-retaining curb stone 24 above the ground is 40cm high and 10cm wide in top) are embedded before the C30 concrete pavement layer 12 is poured;
step ten, formally putting the integrated type turnout area drainage structure into operation after the integrated type turnout area drainage structure is maintained in place.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A construction method of a drainage structure of an integral type turnout area of a railway of a cargo yard in a port area is characterized by comprising the following steps: the drainage structure comprises a lower layer structure of a turnout area consisting of a concrete cushion layer (2) and a concrete supporting layer (3) which are sequentially arranged above an existing sand layer foundation (1) and an upper layer structure of the turnout area consisting of an upper reinforced concrete layer and a lower reinforced concrete layer (4), a sleeper (5) and a steel rail are paved on the lower reinforced concrete layer (4) of the upper structure of the turnout area, and a turnout turning switch rail (18) of the steel rail is connected with a point switch (20) through a point switch connector (19) in a turnout center switching area;
in a turnout junction area outside the turnout center, an upper layer reinforced concrete layer (4) of the upper structure of the turnout area of the railway bed is poured inside, between and outside stock rails (6) of each strand of steel rail, the top surface of the upper layer reinforced concrete layer is flush with the top surface of the stock rails (6), and a wheel edge groove (9) is reserved on the part of the upper layer reinforced concrete layer, which is close to the inside of the stock rails (6);
in a turnout center switching area, an upper layer of reinforced concrete layer (4) of an upper structure of the turnout area of the track bed is poured between stock rails (6) of each strand of steel rail and on the outer side of the stock rails, the top surface of the upper layer of reinforced concrete layer is flush with the top surface of the stock rails (6), the upper layer of reinforced concrete layer (4) is not poured on the inner side of the stock rails (6) of each strand of steel rail, and an adjusting space for sliding of turnout turning switch rails (18) and a switch machine connector (19) is formed;
the construction method comprises the following steps:
step one, constructing an integral type roadbed turnout area drainage structure foundation, excavating to a designed elevation after an existing concrete pavement is broken, carrying out a foundation bearing capacity test, determining a field roadbed bearing load value, a filling change requirement and a filling depth, compacting after filling change if filling change is needed, and directly compacting an existing sand layer foundation (1) if filling change is not needed;
constructing a lower structure of the drainage structure of the integrated track bed turnout area, constructing a concrete cushion layer (2) and a concrete supporting layer (3) in sequence, and paving a drainage pipe (15) in a turnout point area;
constructing an upper structure lower layer reinforced concrete layer (4) of the drainage structure of the integrated track bed turnout area, binding reinforcing bars of the upper structure lower layer reinforced concrete layer (4), laying sleepers (5) and steel rails and anchoring the sleepers and the steel rails by using fasteners (7), installing a point switch (20), finely adjusting the elevation of the track surface of the turnout by using a support frame, and pouring upper structure lower layer concrete after the designed elevation is reached;
constructing an upper-layer reinforced concrete layer (4) of the upper structure of the track connecting area outside the turnout center of the drainage structure of the integrated turnout zone, binding reinforcing bars of the upper-layer reinforced concrete layer (4) of the upper structure, and pouring upper-layer concrete of the upper structure on the inner sides, between the inner sides and the outer sides of the basic rails (6) of each strand of steel rail after reserving and protecting the positions of fasteners (7) on two sides of the steel rail;
constructing an upper-layer reinforced concrete layer (4) of the upper structure of the turnout center switching area of the drainage structure of the integral type turnout area of the track bed, binding reinforcing bars of the upper-layer reinforced concrete layer (4) of the upper structure, reserving and protecting the positions of fasteners (7) on the outer sides of the steel rails, and pouring upper-layer concrete of the upper structure between basic rails (6) of each strand of steel rails and on the outer sides of the basic rails;
constructing capillary permeable drainage belts in a turnout point switching area of a drainage structure in a turnout area of an integral track bed, installing capillary water collecting pipes (21) among sleepers (5) in the turnout point switching area and communicating with a drainage pipe (15) reserved at the bottom, installing plugs (26) at the initial two ends of the capillary water collecting pipes (21) and covering the capillary water collecting pipes with a permeable stone layer (22) wrapped by water permeable geotextile (23) to obtain protective covering;
constructing an asphalt mortar protective belt (8), wrapping and protecting two sides of a basic rail (6) of a track connecting area outside a turnout center of a drainage structure of the integrated railway bed turnout area and the outside of the basic rail (6) of the turnout center switching area by a rubber jacket, then pouring asphalt mortar to form the asphalt mortar protective belt (8), and paying attention to the arrangement and protection of a wheel edge groove (9) inside a steel rail;
step eight, constructing supporting facilities of the drainage structure of the integral type turnout area of the track bed, constructing a cable trench (16) on the right side and cover plate trenches (17) on the left side and the right side of the drainage structure of the integral type turnout area of the track bed, and communicating the cover plate trenches (17) with drainage pipes (15) correspondingly arranged to form a turnout switch area drainage system;
step nine, recovering construction of the road surfaces on the left side and the right side of the drainage structure of the integrated turnout area of the track bed;
step ten, formally putting the integrated type turnout area drainage structure into operation after the integrated type turnout area drainage structure is maintained in place.
2. The construction method of the integrated turnout drainage structure of the harbor cargo yard railway according to claim 1, characterized in that: lay in the regional stock rail of switch center switch (6) outside and lay in switch center outside the equal length in both sides of the regional stock rail of switch center outside (6) inside and outside and be provided with asphalt mortar boundary belt (8), including fastener (7) of fixed stock rail (6) are sealed in asphalt mortar boundary belt (8), and fastener (7) outside parcel has the isolation layer of rubber overcoat form, sets up asphalt mortar boundary belt (8) top surface and stock rail (6) top surface parallel and level in the stock rail (6) outside, and sets up at the inboard asphalt mortar boundary belt (8) top surface of stock rail (6) and wheel flange groove (9) and set up the elevation unanimity.
3. The construction method of the integrated turnout drainage structure of the harbor cargo yard railway according to claim 1, characterized in that: be provided with capillary drainage strip that permeates between sleeper (5) in the switch area of switch center, capillary drainage strip that permeates is including capillary catchment pipe (21) that is on a parallel with switch district sleeper (5) and sets up, the shutoff of capillary catchment pipe (21) both ends, and its middle part is linked together through three way connection and drain pipe (15), and permeable rice stone layer (22) the protection of its top through infiltration geotechnological cloth (23) parcel, and permeable rice stone layer (22) top surface and lower floor reinforced concrete layer (4) top surface parallel and level of railway bed switch district superstructure, drain pipe (15) are buried underground in lower floor reinforced concrete layer (4) of railway bed switch district superstructure below capillary catchment pipe (21), and its end extends to in apron ditch (17).
4. The construction method of the integrated turnout drainage structure of the harbor cargo yard railway according to claim 1, characterized in that: and water-retaining kerbs (24) are arranged on the outer sides of the cover plate water ditches (17) on the two sides of the turnout point area, and the water-retaining kerbs (24) are arranged in the turnout point area along the extending direction of the line in a full-length mode.
5. The construction method of the integrated turnout drainage structure of the harbor cargo yard railway according to claim 1, characterized in that: and a drainage longitudinal slope inclined towards a switch point area is arranged at the bottom of the rim groove (9).
6. The construction method of the integrated turnout drainage structure of the harbor cargo yard railway according to claim 3, characterized in that: capillary catchment pipe (21) is including catchment pipe (27) at center and fixed attached capillary drainage strip (28) on catchment pipe (27) outer wall, capillary drainage strip (28) are gone up and are seted up a plurality of capillary slotted holes (29) with catchment pipe (27) axis parallel arrangement according to annular array, capillary slot (29) one side of keeping away from catchment pipe (27) axis is seted up with external intercommunication capillary groove (30), capillary groove (30) form in capillary drainage strip (28) outer wall and inhale water notch (31), and capillary slotted hole (29), capillary groove (30) and absorb water notch (31) form big-end-up on capillary catchment pipe (21) cross section, the shape is like the drainage passageway of "omega".
7. The construction method of the integrated turnout drainage structure of the harbor cargo yard railway according to claim 6, characterized in that: the capillary water collecting pipe (21) is paved towards two sides by taking the center of a fork area as a separation point, drainage cross slopes inclined towards cover plate water channels (17) on two sides are correspondingly arranged respectively, all sections of the capillary water collecting pipe are arranged according to 50-100cm and are assembled into a whole through joints (25), each joint (25) is in a connecting sleeve form, the inner diameter of each joint is matched with the outer diameter of the capillary water collecting pipe (21), clamping grooves are arranged in the middle of the inner side of each joint according to an annular array, the clamping grooves connect and fix the capillary water collecting pipes (21) on two sides, a butt joint gap is formed between the two capillary water collecting pipes, and the butt joint gap is communicated with a capillary groove hole (29) of the capillary water collecting pipe (21) and the inner space of the water collecting pipe (27).
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| US20210140121A1 (en) * | 2017-12-15 | 2021-05-13 | Embedded Rail Technology Limited | Rail junction assembly |
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| WO2003012203A3 (en) * | 2001-08-02 | 2003-05-01 | Balfour Beatty Plc | Rail arrangement |
| CN106320100A (en) * | 2016-08-11 | 2017-01-11 | 杜伦平 | New technology for treating railway subgrade mud-pumping damage |
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