CN107476820B - Subway evacuation platform and manufacturing method thereof - Google Patents
Subway evacuation platform and manufacturing method thereof Download PDFInfo
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- CN107476820B CN107476820B CN201710752655.8A CN201710752655A CN107476820B CN 107476820 B CN107476820 B CN 107476820B CN 201710752655 A CN201710752655 A CN 201710752655A CN 107476820 B CN107476820 B CN 107476820B
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Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F11/00—Rescue devices or other safety devices, e.g. safety chambers or escape ways
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/04—Discharging the shaped articles
- B28B13/06—Removing the shaped articles from moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
- B28B23/12—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed to form prestressed circumferential reinforcements
- B28B23/16—Prestressed reinforcing nets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
- B28B3/205—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded using vibrations
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/30—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing magnesium cements or similar cements
- C04B28/32—Magnesium oxychloride cements, e.g. Sorel cement
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a subway evacuation platform and a manufacturing method thereof, wherein the subway evacuation platform comprises a buttress (5), a platform plate (4) and a limiting device, a groove (41) is formed in the end part of the platform plate (4), the limiting device is arranged in the groove (41), and the platform plate (4) is fixed at the top of the buttress (5) through the limiting device; the platform plate (4) comprises the following components in parts by weight: 10-15 parts of inorganic cementing material, 40-60 parts of coarse aggregate, 20-30 parts of fine aggregate, 10-15 parts of admixture, 0.5-3 parts of fiber, 0.5-1.5 parts of additive and 2-6 parts of water. The platform plate is fixed on the buttress in an omnibearing manner from the horizontal direction and the vertical direction by using the metal connecting piece and the bonding mortar, so that the displacement of the platform plate caused by the disturbance wind pressure is avoided, and the potential safety hazard is eliminated; and innovate the production technology and technical formulation of the platform plate, promote the product quality, realize the green production at the same time.
Description
Technical Field
The invention belongs to the technical field of subway station equipment, and particularly relates to a subway evacuation platform and a manufacturing method thereof.
Background
The subway evacuation platform mainly comprises a platform plate and a buttress, and the installation technical scheme of the existing evacuation platform plate and buttress is as follows: the two ends of the platform boards are respectively provided with a limiting clamping groove, the corresponding positions of the tops of the buttresses are provided with limiting bosses, the platform boards are lapped on the buttresses on the two sides below, and the buttresses bosses are embedded into the clamping grooves of the platform boards, so that the platform boards are prevented from moving laterally on the buttresses, and gaps between the platform boards are filled with fine stone concrete or cement mortar.
The platform plate and the buttress of the existing scheme are connected in an embedded manner through the limiting clamping groove and the boss, the limiting in the horizontal direction can only be realized, and the limiting in the vertical direction of the platform plate is mainly realized through the self weight of the platform plate. When the train runs at a high speed, particularly when two trains meet, the unidirectional disturbance wind pressure with different degrees can be generated according to different running speeds of the trains, and the platform plate can be subjected to corresponding lifting force. When the instant lifting force approaches or exceeds the dead weight of the platform plate, the platform plate is lifted or lifted entirely, and safety accidents are caused, so that the existing scheme has great potential safety hazards. In addition, the disturbance wind pressure that train reciprocating motion produced not only applys fatigue load to evacuation platform, makes platform board and buttress junction produce the horizontal direction in addition or the removal of vertical direction, leads to collision each other between the platform board to make the component accelerate the damage, life greatly reduced.
On the other hand, in the production process of the platform plate, the traditional pouring molding process has low automation degree, low production efficiency, high cost, large water demand and serious noise pollution and air pollution. And the dimension and performance of the platform plate product produced by the traditional pouring molding process are uneven, and the quality is difficult to ensure, so that the evacuation platform is free from buckling deformation and even cracking in the use process.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a subway evacuation platform and a manufacturing method thereof, wherein the platform plate is fixed on a buttress in all directions from the horizontal direction and the vertical direction by using metal connecting pieces and adhesive mortar, so that the displacement of the platform plate caused by the disturbance of wind pressure is avoided, and the potential safety hazard is eliminated; and the production process and the formula of the platform plate are optimized, and the product quality is improved.
In order to achieve the above object, the present invention adopts the following solutions: the utility model provides a subway evacuation platform, includes buttress, platform board and stop device, the tip of platform board is equipped with the recess, and stop device establishes in the recess, and the platform board passes through stop device to be fixed at the top of buttress.
Further, stop device includes location built-in fitting, locating plate and setting element, the locating plate is established in the recess of platform board tip, and the location built-in fitting is fixed on the buttress, the setting element includes the locating screw rod and establishes the locating nut in the locating plate top, and locating screw rod's one end and location built-in fitting fixed connection, locating screw rod's the other end pass the locating plate and be connected with the locating nut, and the tip of platform board is fixed between locating plate and buttress.
Further, a slot is formed in the positioning embedded part, a positioning anti-slip slot is formed in the positioning embedded part and is communicated with the slot, the positioning part further comprises a positioning cross rod fixedly connected with a positioning screw rod, the positioning cross rod is fixed in the positioning anti-slip slot through mortar, and the positioning screw rod penetrates through the slot and the positioning plate and is connected with a positioning nut.
Further, the platform plate comprises the following components in parts by weight: 10-15 parts of inorganic cementing material, 40-60 parts of coarse aggregate, 20-30 parts of fine aggregate, 10-15 parts of admixture, 0.5-3 parts of fiber, 0.5-1.5 parts of additive and 2-6 parts of water.
Further, the inorganic cementing material comprises at least one of silicate cement, sulphoaluminate cement and magnesite cementing material.
Further, the coarse aggregate is stone, and the fine aggregate comprises at least one of natural sand and machine-made sand.
Further, the admixture includes at least one of fly ash, silica fume, and granulated blast furnace slag.
Further, the fibers include at least one of steel fibers, polypropylene fibers, lignin fibers, basalt fibers, and carbon fibers.
Further, the additive comprises at least one of a polycarboxylic acid high-efficiency water reducing agent, a water retaining agent, a retarder, an early strength agent and a toughening agent.
Further, the manufacturing method of the subway evacuation platform comprises the following steps:
s1, mixing concrete: adding inorganic cementing materials, coarse aggregates, fine aggregates, admixture, fibers, admixture and water into a stirrer for stirring, and conveying the evenly stirred dry and hard concrete to a first material distribution hopper and a second material distribution hopper respectively by using a conveyor;
s2, preparing a forming die: assembling a forming die of the platform plate, and placing the forming die on a transmission production line;
s3, primary cloth: uniformly distributing the concrete in the first distributing hopper in a forming die of the platform plate by using a feeder;
s4, laying a reinforcing mesh sheet: horizontally laying a reinforcing steel mesh sheet of the platform plate on the concrete in the forming die by using a reinforcing steel mesh machine;
s5, secondary cloth: uniformly spraying the concrete in the second distributing hopper into a forming die of the platform plate (4) by using a feeder again, so that the concrete covers all the reinforcing steel meshes;
s6, vibration extrusion: vibrating and pressing the concrete in the forming die by using a vibrating extruder to uniformly dip the slurry separated out from the concrete on the contact surface of the concrete and the forming die;
s7, placing a mold core: placing the mold core on the concrete after vibration pressing in the forming mold;
s8, stacking the dies: stacking the vibrated concrete, the forming die and the die core into a stack, wherein the stacking height is 1-1.5m;
s9, press forming: pressing the stack in the step S8 by using a press for 10-15min and 1-5min;
s10, demolding: separating the mold core from the concrete blank, and then removing the pressed concrete blank from the forming mold;
s11, steam curing: and (3) conveying the concrete blank in the step (S10) into a steam curing chamber, and introducing damp and hot steam to accelerate curing of the concrete blank.
The beneficial effects of the invention are as follows:
(1) According to the invention, the metal connecting piece and the adhesive mortar are used, so that the platform plate and the buttress are fused into an organic whole, the platform plate is fixed on the buttress in all directions from the horizontal direction and the vertical direction, the displacement of the platform plate caused by the disturbance of wind pressure is avoided, and the potential safety hazard is eliminated;
(2) The platform boards can be prevented from collision after being fixed, so that the damage caused by member fatigue is reduced, the service life of equipment is prolonged, and the maintenance cost is reduced;
(3) The locating piece is fixed on the buttress through the locating cross rod, the locating piece is firmly connected with the buttress, and the locating piece is firm and durable and has high reliability;
(4) The end part of the platform plate is fixed between the positioning plate and the buttress through the positioning nut, and the limiting piece has a simple structure and is convenient to install;
(5) Full-automatic production is high in efficiency, demolding time is shortened from 15-20 hours to 20-30 minutes, and productivity is improved by more than 10 times;
(6) The production process is clean and environment-friendly, and has no wastewater, solid waste and dust;
(7) Under the condition of the same strength of the platform plate, the cementing material is saved by 10% -20%, the material cost is lower, and the benefit of production enterprises is improved;
(8) Steam curing is adopted, so that the rapid hardening and early strength are realized, and under the condition of the same dosage of the cementing material, the strength is improved by 40-50% in 3 days and 20-30% in 28 days;
(9) The cement ratio of the vibration pressing process is 0.1-0.15, so that the cement ratio is low, the compactness is high, the durability is good, the concrete interface transition area is obviously improved, and the compactness of the component and the internal cementing strength are greatly improved.
Drawings
FIG. 1 is a cross-sectional view of a subway evacuation platform;
FIG. 2 is an enlarged view of a portion of the subway evacuation platform stop of FIG. 1;
FIG. 3 is a side view of the buttress;
FIG. 4 is an enlarged view of a portion of the positioning cleat of FIG. 3;
FIG. 5 is a schematic view of a positioning member;
FIG. 6 is a top view of the locating plate;
in the accompanying drawings:
the concrete pile comprises the following components of a 1-positioning embedded part, a 11-slotting, a 12-positioning anti-skid groove, 13-mortar, a 2-positioning plate, a 3-positioning part, a 31-positioning screw rod, a 32-positioning nut, a 33-positioning cross rod, a 4-platform plate, a 41-groove, a 5-buttress and a 51-main rib.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is further described below with reference to the accompanying drawings:
the invention provides a subway evacuation platform, which is shown in fig. 1 and comprises a support pier 5, a platform plate 4 and a limiting device, wherein a groove 41 is formed in the end part of the platform plate 4, the limiting device is arranged in the groove 41, and the platform plate 4 is fixed at the top of the support pier 5 through the limiting device.
As shown in fig. 2, the limiting device comprises a positioning embedded part 1, a positioning plate 2 and a positioning part 3, wherein the positioning plate 3 is arranged in a groove 41 at the end part of a platform plate 4, and the positioning embedded part 1 is fixed on a buttress 5. As shown in fig. 5, the positioning member 3 includes a positioning screw 31, a positioning cross rod 33, and a positioning nut 32 disposed above the positioning plate 2, the positioning cross rod 33 is fixedly connected with the positioning screw 31, one end of the positioning screw 31 is fixed in the positioning embedded member 1 through the positioning cross rod 33, the other end of the positioning screw 31 passes through the positioning plate 2 and is connected with the positioning nut 32, and the end of the platform plate 4 is fixed between the positioning plate 2 and the buttress 5.
As shown in fig. 3 and 4, the positioning embedded part 1 is arranged in the buttress 5, and the positioning embedded part 1 is fixedly connected with the main rib 51 of the buttress 5. The positioning embedded part 1 is provided with a slot 11, the positioning embedded part 1 is internally provided with a positioning anti-skid groove 12, the positioning anti-skid groove 12 is communicated with the slot 11, the positioning cross rod 33 is fixed in the positioning anti-skid groove 12, the positioning cross rod 33 is vertical to the slot 11, and the positioning screw 31 penetrates through the slot 11 and the positioning plate 2 and is connected with the positioning nut 32. In actual installation, the platform plate 4 is placed on the support piers 5, then the positioning cross rod 33 is placed into the positioning anti-skid groove 12 along the direction of the slot 11, then the positioning cross rod is rotated by 90 degrees, two wings of the positioning plate 2 are clamped into the grooves 41 of the platform plates 4 on two sides, and the platform plates 4 and the support piers 5 are fixed in all directions in the horizontal direction and the vertical direction. As shown in fig. 6, the grooves 41 of the platform plate 4 used in the present invention do not penetrate, and the depth is usually 25mm, compared with the conventional platform plate 4.
The positioning anti-slip groove 12 is filled with mortar 13 (or fine stone concrete), and the positioning cross bar 33 is fixed in the positioning anti-slip groove 12 through the mortar 13. Similarly, the gaps between the grooves 41 of the platform plate 4 are also filled with mortar 13 (or fine stone concrete).
The platform plate 4 comprises the following components in parts by weight: 10-15 parts of inorganic cementing material, 40-60 parts of coarse aggregate, 20-30 parts of fine aggregate, 10-15 parts of admixture, 0.5-3 parts of fiber, 0.5-1.5 parts of additive and 2-6 parts of water.
Specifically, the inorganic cementing material comprises at least one of silicate cement, sulphoaluminate cement and magnesite cementing material, the coarse aggregate is cobble, the fine aggregate comprises at least one of natural sand and machine-made sand, and the admixture comprises natural or artificial powdery minerals such as fly ash, silica fume, granulated blast furnace slag and the like, which can improve the performance of concrete. Fibers include, but are not limited to, natural and chemical fibers such as steel fibers, polypropylene fibers, lignin fibers, basalt fibers, carbon fibers, and the like. The admixture comprises at least one of a polycarboxylic acid high-efficiency water reducing agent, a water retaining agent, a retarder, an early strength agent and a toughening agent.
The manufacturing method of the subway evacuation platform comprises the following steps:
1. mixing concrete: adding inorganic cementing materials, coarse aggregates, fine aggregates, admixture, fibers, admixture and water into a stirrer for stirring, and conveying the evenly stirred dry and hard concrete to a first material distribution hopper and a second material distribution hopper respectively by using a conveyor;
2. preparing a forming die: assembling a forming die of the platform plate 4, and placing the forming die on a transmission production line;
3. primary cloth: uniformly distributing the concrete in the first distributing hopper in a forming die of the platform plate 4 by using a feeder;
4. laying a reinforcing mesh sheet: horizontally laying the reinforced mesh of the platform plate 4 on the concrete in the forming die by using a reinforced mesh machine;
5. secondary cloth: uniformly spraying the concrete in the second distributing hopper into a forming die of the platform plate (4) by using a feeder again, so that the concrete covers all the reinforcing steel meshes;
6. vibration extrusion: vibrating and pressing the concrete in the forming die by using a vibrating extruder to uniformly dip the slurry separated out from the concrete on the contact surface of the concrete and the forming die;
7. placing a mold core: placing the mold core on the concrete after vibration pressing in the forming mold;
8. and (3) stacking the dies: stacking the vibrated concrete, the forming die and the die core into a stack, wherein the stacking height is 1-1.5m;
9. and (5) press forming: pressing the stack in the step 8 by using a press for 10-15min and 1-5min;
10. demolding: separating the mold core from the concrete blank, and then removing the pressed concrete blank from the forming mold;
11. steam curing: and (3) conveying the concrete blank in the step (10) into a steam curing chamber, and introducing hot and humid steam to accelerate curing of the concrete blank.
The platform plate 4 is produced by adopting an automatic production line, and the first material distribution hopper, the wire mesh feeding machine, the second material distribution hopper and the vibration extruder are sequentially arranged along the conveying direction of the production line, so that the production efficiency is high, and the labor intensity of staff is low.
Example 1:
the raw materials are added into stirring equipment according to the weight parts shown in the table 1 for stirring, and then the finished product of the platform plate 4 is prepared through the steps of material distribution, vibration extrusion, pressing, steam curing and the like. The relevant performance of the finished product of the platform plate 4 is measured by referring to GB 50204-2015 'inspection and acceptance Specification for construction quality of concrete structure engineering', and the results are shown in Table 2.
Table 1:
table 2:
as can be seen from the data in table 2, the performance indexes of the finished product of the platform plate 4 produced according to the raw materials and the parts by weight thereof in table 1 all meet the construction quality specifications.
Example 2:
the raw materials are added into stirring equipment according to the weight parts shown in the table 3 for stirring, and then the finished product of the platform plate 4 is prepared through the steps of material distribution, vibration extrusion, pressing, steam curing and the like. The relevant performance of the finished product of the platform plate 4 is measured by referring to GB 50204-2015 'inspection and acceptance Specification for construction quality of concrete structure engineering', and the results are shown in Table 4.
Table 3:
table 4:
as can be seen from the data in table 4, the performance indexes of the finished product of the platform plate 4 produced according to the raw materials and the parts by weight thereof in table 3 all meet the construction quality specifications.
Example 3:
the raw materials are added into stirring equipment according to the weight parts shown in the table 5 for stirring, and then the finished product of the platform plate 4 is prepared through the steps of material distribution, vibration extrusion, pressing, steam curing and the like. The relevant performance of the finished product of the platform plate 4 is measured by referring to GB 50204-2015 'inspection and acceptance Specification for construction quality of concrete structure engineering', and the results are shown in Table 6.
Table 5:
table 6:
as can be seen from the data in table 6, the performance indexes of the finished product of the platform plate 4 produced according to the raw materials and the parts by weight thereof in table 5 all meet the construction quality specifications.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A subway evacuation platform is characterized in that: the device comprises a buttress (5), a platform plate (4) and a limiting device, wherein a groove (41) is formed in the end part of the platform plate (4), the limiting device is arranged in the groove (41), and the platform plate (4) is fixed at the top of the buttress (5) through the limiting device;
the limiting device comprises a positioning embedded part (1), a positioning plate (2) and a positioning part (3), wherein the positioning plate (2) is arranged in a groove (41) at the end part of a platform plate (4), the positioning embedded part (1) is fixed on a buttress (5), the positioning part (3) comprises a positioning screw rod (31) and a positioning nut (32) arranged above the positioning plate (2), one end of the positioning screw rod (31) is fixedly connected with the positioning embedded part (1), the other end of the positioning screw rod (31) penetrates through the positioning plate (2) and is connected with the positioning nut (32), and the end part of the platform plate (4) is fixed between the positioning plate (2) and the buttress (5);
the positioning embedded part (1) is provided with a slot (11), the positioning embedded part (1) is internally provided with a positioning anti-slip slot (12), the positioning anti-slip slot (12) is communicated with the slot (11), the positioning part (3) further comprises a positioning cross rod (33) fixedly connected with a positioning screw rod (31), the positioning cross rod (33) is fixed in the positioning anti-slip slot (12) through mortar (13), and the positioning screw rod (31) penetrates through the slot (11) and the positioning plate (2) and is connected with a positioning nut (32).
2. A subway evacuation platform according to claim 1, wherein: the platform plate (4) comprises the following components in parts by weight: 10-15 parts of inorganic cementing material, 40-60 parts of coarse aggregate, 20-30 parts of fine aggregate, 10-15 parts of admixture, 0.5-3 parts of fiber, 0.5-1.5 parts of additive and 2-6 parts of water.
3. A subway evacuation platform according to claim 2, wherein: the inorganic cementing material comprises at least one of silicate cement, sulphoaluminate cement and magnesite cementing material.
4. A subway evacuation platform according to claim 2, wherein: the coarse aggregate is stone, and the fine aggregate comprises at least one of natural sand and machine-made sand.
5. A subway evacuation platform according to claim 2, wherein: the admixture includes at least one of fly ash, silica fume, and granulated blast furnace slag.
6. A subway evacuation platform according to claim 2, wherein: the fibers include at least one of steel fibers, polypropylene fibers, lignin fibers, basalt fibers, and carbon fibers.
7. A subway evacuation platform according to claim 2, wherein: the additive comprises at least one of a polycarboxylic acid high-efficiency water reducer, a water-retaining agent, a retarder, an early strength agent and a toughening agent.
8. A method of manufacturing a subway evacuation platform according to any one of claims 1 to 7, wherein: it comprises the following steps:
s1, mixing concrete: adding inorganic cementing materials, coarse aggregates, fine aggregates, admixture, fibers, admixture and water into a stirrer for stirring, and conveying the evenly stirred dry and hard concrete to a first material distribution hopper and a second material distribution hopper respectively by using a conveyor;
s2, preparing a forming die: assembling a forming die of the platform plate (4), and placing the forming die on a transmission production line;
s3, primary cloth: uniformly distributing the concrete in the first distributing hopper in a forming die of the platform plate (4) by using a feeder;
s4, laying a reinforcing mesh sheet: horizontally laying a reinforced net sheet of the platform plate (4) on the concrete in the forming die by using a reinforced net machine;
s5, secondary cloth: uniformly spraying the concrete in the second distributing hopper into a forming die of the platform plate (4) by using a feeder again, so that the concrete covers all the reinforcing steel meshes;
s6, vibration extrusion: vibrating and pressing the concrete in the forming die by using a vibrating extruder to uniformly dip the slurry separated out from the concrete on the contact surface of the concrete and the forming die;
s7, placing a mold core: placing the mold core on the concrete after vibration pressing in the forming mold;
s8, stacking the dies: stacking the vibrated concrete, the forming die and the die core into a stack, wherein the stacking height is 1-1.5m;
s9, press forming: pressing the stack in the step S8 by using a press for 10-15min and 1-5min;
s10, demolding: separating the mold core from the concrete blank, and then removing the pressed concrete blank from the forming mold;
s11, steam curing: and (3) conveying the concrete blank in the step (S10) into a steam curing chamber, and introducing damp and hot steam to accelerate curing of the concrete blank.
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| CN108314374A (en) * | 2018-01-22 | 2018-07-24 | 北京天基同创轨道交通科技有限公司 | A kind of production method of the environment-friendly type evacuation platform plate of large dosage industrial residue |
| CN114658477B (en) * | 2022-03-30 | 2023-10-17 | 哈尔滨工业大学 | Large-span light subway evacuation platform plate and manufacturing process thereof |
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| AT255096B (en) * | 1965-10-07 | 1967-06-26 | Porr Allg Bauges | Process for the production of prestressed concrete or reinforced concrete girders and girders made afterwards |
| CN101318801A (en) * | 2008-07-09 | 2008-12-10 | 东南大学 | Cement-base material with good movability and high intensity, and method of manufacturing the same |
| CN102797199A (en) * | 2011-05-24 | 2012-11-28 | 江苏江都建设集团有限公司 | Rail fixing device |
| CN203034349U (en) * | 2012-11-27 | 2013-07-03 | 中铁第四勘察设计院集团有限公司 | Anti-fall beam device |
| CN203730059U (en) * | 2014-01-03 | 2014-07-23 | 四川鑫创伟业路桥工程有限公司 | Ultrathin high-performance inorganic material evacuation platform |
| CN203835440U (en) * | 2014-05-09 | 2014-09-17 | 熊伟 | Novel evacuation platform |
| CN203878481U (en) * | 2014-06-17 | 2014-10-15 | 中铁城建集团第二工程有限公司 | Railway bridge buttress embedded bolt positioning device |
| CN105297921A (en) * | 2015-09-17 | 2016-02-03 | 中民筑友有限公司 | Prefabricated plate and prefabricated wall joint and construction method thereof |
| CN205296455U (en) * | 2015-12-01 | 2016-06-08 | 中国建筑第八工程局有限公司 | A positioner for between buttress and isolation bearing |
| CN205854139U (en) * | 2016-07-05 | 2017-01-04 | 中泰国际高新技术有限公司 | A kind of platform support and evacuation platform |
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