CN111139697A - Self-compacting concrete pouring method and device for subway plate type turnout - Google Patents
Self-compacting concrete pouring method and device for subway plate type turnout Download PDFInfo
- Publication number
- CN111139697A CN111139697A CN202010043132.8A CN202010043132A CN111139697A CN 111139697 A CN111139697 A CN 111139697A CN 202010043132 A CN202010043132 A CN 202010043132A CN 111139697 A CN111139697 A CN 111139697A
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- Prior art keywords
- self
- pump
- hopper
- compacting concrete
- small
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- 239000011376 self-consolidating concrete Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000004567 concrete Substances 0.000 claims abstract description 35
- 238000005056 compaction Methods 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 239000003292 glue Substances 0.000 claims abstract description 17
- 238000005086 pumping Methods 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 229920000742 Cotton Polymers 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 238000009736 wetting Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 18
- 238000003756 stirring Methods 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 230000032258 transport Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
- E01B27/12—Packing sleepers, with or without concurrent work on the track; Compacting track-carrying ballast
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention relates to a self-compacting concrete pouring method for a ground iron plate type turnout, which is characterized by comprising the following steps of: s100, placing self-compacting concrete into a large pump hopper; s101, starting a large pump, running at a low speed, and conveying the self-compacting concrete in a large pump hopper to a small pump hopper beside a turnout plate through a metal pump pipe; s102, when the small pump hopper is full, starting the small pump, enabling the small pump to be in a pumping state, and conveying the self-compacting concrete to a pouring hopper through a small-caliber glue pump pipe; s103, when waiting to fill the hopper soon, open the discharge gate that fills the hopper, carry self-compaction concrete to filling the position, accomplish pouring of board-like switch self-compaction concrete. The application provides a board-like switch of subway self-compaction concrete filling method and device can guarantee the continuous of self-compaction concrete and fill, and the success rate that fills is high, and the time interval that fills between last switch board and the next switch board is short moreover, and the efficiency of construction is high, and construction intensity of labour is low.
Description
Technical Field
The invention relates to the technical field of railway construction, in particular to a method and a device for pouring self-compacting concrete of a subway plate type turnout.
Background
The plate type turnout slab system is composed of a multilayer structure, and comprises a concrete base, a geotextile isolation layer, a self-compacting concrete layer and a prefabricated turnout slab from bottom to top. Because the subway enters into another track from one track through the plate-type turnout or turns. Thus, a plate switch is generally tapered in width.
Prefabricated switch board in the subway project is horizontal and vertical size is all great at present, and the prefabricated switch board transports the degree of difficulty in narrow space in the underground big, and while is smooth-going for guaranteeing that switch track and common rail's linking, other conventional tracks of switch of constructing are constructed earlier to general needs, and a subway line is last to have a plurality of switches usually, and every switch interval distance is far away. But what the board-like switch of subway generally adopted is that irritate the board earlier, the construction process of back installation switch rail, because before pouring into self-compaction concrete, do not have the switch rail, self-compaction concrete can't directly transport to the operation face position through the rail is direct, simultaneously, the self-compaction concrete of every switch board must once only pour into, the centre can not have the pause, this construction difficulty that has just caused the self-compaction concrete of the board-like switch of subway to pour into, the board-like switch is far away the difficulty more greatly apart from the feed opening.
Disclosure of Invention
The invention aims to solve the technical problems and provides a method for pouring self-compacting concrete of a subway plate type turnout, which can ensure the continuous pouring of the self-compacting concrete, has high pouring success rate, short time interval between the pouring of a previous turnout plate and the pouring of a next turnout plate, high construction efficiency and low construction labor intensity. The invention also aims to provide a self-compacting concrete pouring device for the subway plate type turnout, which can achieve the effect by adopting the method.
The technical scheme of the invention is as follows:
a self-compacting concrete pouring method for a ground iron plate type turnout comprises the following steps:
s100, placing self-compacting concrete into a large pump hopper;
s101, starting a large pump, running at a low speed, and flowing self-compacting concrete in a hopper of the large pump into a hopper of a small pump beside a turnout plate through a metal pump pipe;
s102, when the small pump hopper is full, starting the small pump, enabling the small pump to be in a pumping state, and conveying the self-compacting concrete to a pouring hopper through a small-caliber glue pump pipe;
s103, when waiting to fill the hopper soon, open the discharge gate that fills the hopper, self-compaction concrete is carried to filling the position, accomplishes filling of board-like switch self-compaction concrete.
Preferably, the pumping state of the small pump is that the delivery capacity of the small pump is 7-8 m3/h。
Preferably, before step s100, water is discharged to the large pump hopper, and the metal pump pipe and the small-caliber glue pump pipe are wetted.
Preferably, the self-compacting concrete transported to the discharge position is inspected before the metal pump pipe and the small-caliber glue pump pipe are wetted.
Preferably, the self-compacting concrete is tested, either before or after,
and obtaining the conveying speed of the small pump according to the preset pouring time of each turnout plate under the conditions of the distance between the discharging position and the turnout plate, the volume of the turnout plate and the vertical conveying distance.
Preferably, before step s100, the cavity at the bottom of the turnout plate is cleaned up of garbage and dust, and is pre-wetted by a rotating high-pressure gun, and accumulated water is sucked dry by cotton yarn or sponge.
A self-compacting concrete pouring device for a subway plate type turnout is applied to the self-compacting concrete pouring method for the subway plate type turnout and comprises a big pump provided with a big pump hopper and a small pump provided with a small pump hopper, wherein the big pump is positioned at a discharging position, the small pump is positioned beside the turnout plate,
the big pump hopper with little pump hopper passes through the metal pump pipe intercommunication, the discharge gate of little pump hopper is connected with the filling hopper through small-bore glue pump pipe, the discharge gate and the filling hole of filling material correspond the setting.
Preferably, the large pump is located above the small pump.
Preferably, the vertical conveying height of the small pump is 15-20 m.
Preferably, the horizontal conveying distance of the small pump is 60-80 m.
The invention provides a subway plate type turnout self-compacting concrete pouring method which comprises the steps of firstly, placing self-compacting concrete into a large pump hopper, starting a large pump, enabling the large pump to run at a low speed, enabling the self-compacting concrete in the large pump hopper to flow into a small pump hopper located beside a turnout plate through a metal pump pipe, starting a small pump when the small pump hopper is full, enabling the small pump to be in a pumping state, conveying the self-compacting concrete to a pouring hopper through a small-caliber glue pump pipe, opening a discharge port of the pouring hopper when the pouring hopper is full, conveying the self-compacting concrete to a pouring part, and finishing pouring of the plate type turnout self-compacting concrete. Through the distance between big pump and the little pump, open the transport distance of control self-compaction concrete, the little pump is in pumping state, controls self-compaction concrete filling speed through the little pump. Just so under the condition that does not have the switch rail, with self-compaction concrete pumping to operation face position, through the control to concrete conveying distance and pouring the velocity of flow, realize the continuous pouring of self-compaction concrete, the success rate of pouring is high, when pouring a switch board down, directly will pour the hopper and move to the filling hole department of a switch board down, the time interval who fills between last switch board and a switch board down is short like this, the efficiency of construction is high, construction low in labor strength.
The self-compacting concrete pouring device for the subway plate type turnout provided by the invention can achieve the effects by adopting the method.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be 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 described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flow chart of a method for pouring self-compacting concrete for a subway plate type turnout in the embodiment;
fig. 2 is a schematic structural diagram of the subway plate type turnout self-compacting concrete pouring device in the embodiment.
Reference numbers in the drawings illustrate: 13. a large pump; 14. a small pump; 15. a turnout plate; 16. a metal pump tube; 17. a small-bore rubber pump tube; 18. a perfusion hole; 19. and (6) pouring the hopper.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate an orientation or positional relationship only for convenience of description and simplicity of description, but do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts in the embodiments are referred to each other.
As shown in fig. 1, the method for pouring concrete into a self-compacting subway slab turnout provided by the present invention comprises the following steps: s100, placing self-compacting concrete into a large pump hopper; s101, starting a large pump 13, running at a low speed, and flowing the self-compacting concrete in a large pump hopper into a small pump hopper positioned beside a turnout plate 15 through a metal pump pipe 16; s102, when the small pump hopper is full, starting the small pump 14, enabling the small pump 14 to be in a pumping state, and conveying the self-compacting concrete to the pouring hopper 19 through the small-caliber glue pump pipe 17; s103, when waiting to fill the hopper 19 soon, open the discharge gate that fills hopper 19, self-compaction concrete is carried to filling the position, accomplishes filling of board-like switch self-compaction concrete.
The conveying distance of the self-compacting concrete is controlled through the distance between the large pump 13 and the small pump 14, the small pump 14 is in a pumping state, and the pouring speed of the self-compacting concrete is controlled through the small pump 14. Just so under the condition that does not have the switch rail, with self-compaction concrete pumping to operation face position, through the control to concrete conveying distance and pouring the velocity of flow, realize the continuous pouring of self-compaction concrete, the success rate of pouring is high, when pouring a switch board 15 down, directly will pour hopper 19 and move to the 18 departments of pouring hole of a switch board 15 down, the time interval who fills between last switch board 15 and a switch board 15 down is short like this, the efficiency of construction is high, the labor intensity of construction is low.
Wherein, the pumping state of the small pump 14 is as follows: the delivery capacity of the small pump 14 is 7-8 m3And/h, preferably, the working pressure of the small pump 14 is kept at 8MPs100, the motor power is 15KW, and the self-compacting concrete pouring construction quality is optimal.
Further, before step s100, water is discharged to the large pump hopper to wet the metal pump pipe 16 and the small-caliber glue pump pipe. The phenomenon that the metal pump pipe 16 and the small-caliber glue pump pipe are too dry in the conveying process of concrete is avoided, so that the concrete is stuck and closed, the blockage in the conveying process is caused, the blockage of the metal pump pipe 16 and the small-caliber glue pump pipe is easily caused, and the continuous pouring of self-compacting concrete is further influenced. Wherein, the diameter of the concrete aggregate is generally 0.5 cm-3 cm, therefore, the pipe diameters of the metal pump pipe 16 and the small-caliber glue pump pipe should be selected to be easy for the concrete to pass through, preferably, the inner diameter of the metal pump pipe 16 is preferably 125 mm; the inner diameter of the small-caliber rubber pump pipe is preferably 100 mm.
Wherein, before wetting the metal pump pipe 16 and the small-caliber glue pump pipe 17, the self-compacting concrete at the discharge position is inspected. The self-compacting concrete comprises fine aggregate, coarse aggregate, a water reducing agent, an expanding agent, a thickening agent and a shrinkage reducing agent. The water absorption of the common fine aggregate is less than or equal to 2 percent; the mud content is less than or equal to 2.0 percent, and the mud block content is less than or equal to 0.5 percent; the mud content of the coarse aggregate is less than or equal to 0.5 percent, the mud block content is less than or equal to 0.2 percent, the water absorption is less than 1 percent, and a thickening agent can be selected when the self-compacting concrete floats upwards and the wrapping performance of the aggregate is poor; when the self-compacting concrete shrinks greatly, a shrinkage reducing agent can be selected, and the raw materials are stirred and mixed. When in stirring, the fine aggregate and the cement are firstly added, after the stirring is uniform, the required water consumption and other reagents are added, the coarse aggregate is added after the mortar is fully stirred, and the stirring is continued until the uniformity is reached, wherein the total stirring time is not less than 120s and not more than 180 s. The prepared self-compacting concrete should meet the following requirements: the water consumption is not more than 190kg/m3(ii) a The sand content is 50-55%, and simultaneously certain compressive strength, elastic modulus, salt freezing resistance and drying shrinkage value are required to be met, and the performance indexes are related to the conveying speed and the pouring quality of the self-compacting concrete. The concrete related parameters are detected, and the conveying speed, the pouring time and the pouring time of the small pump 14 can be measuredThe pouring quality has an optimal value.
And after the self-compacting concrete is detected to be qualified, transporting the self-compacting concrete to a discharging position by using a concrete tank truck. And after the concrete tank truck reaches a discharging position, the concrete tank truck can rotate at a high speed for 2-3 min to discharge.
Further, before or after the self-compacting concrete is inspected, the conveying speed of the small pump 14 is obtained according to the preset pouring time of each turnout plate 15 under the conditions of the distance between a discharging position and the turnout plate 15, the volume of the turnout plate 15 and the vertical conveying distance. Determining the total amount of concrete required for pouring one turnout plate 15 according to the volume of the turnout plate 15 to be poured and the concrete loss amount in the conveying process, acquiring the distance between a placing position and the turnout plate 15, wherein the distance comprises a vertical conveying distance and a horizontal conveying distance, and acquiring the pouring time of each turnout plate 15 to obtain the conveying speed of the small pump 14 and the large pump 13, so as to control the pouring time within the preset pouring time as much as possible on the premise of ensuring the pouring quality; or, according to the actual situation, the conveying speed of the small pump 14 is adjusted to shorten the pouring time of each preset turnout plate 15, so as to shorten the construction time and accelerate the construction progress.
Before step s100, the cavity of the turnout plate 15 is cleaned of garbage and dust, the turnout plate is pre-wetted by a rotary high-pressure gun, and accumulated water is sucked by cotton yarn or sponge. So that the finished product after being poured has smooth and beautiful appearance and no impurities.
The construction time can be selected, when the turnout is poured, the construction time is preferably selected from 5:00 in the afternoon to 9:00 in the next day, the temperature in the period is low, the influence on the mix proportion and the performance of the concrete is minimal, and the pouring success rate is high. And the construction interference at night is small, and the construction is convenient.
Please show as fig. 2, a self-compacting concrete pouring device for a subway plate type turnout, which is applied to a self-compacting concrete pouring method for a subway plate type turnout, comprising a large pump 13 provided with a large pump hopper and a small pump 14 provided with a small pump hopper, wherein the large pump 13 is positioned at a material placing position, the small pump 14 is positioned beside a turnout plate 15, the large pump hopper is communicated with the small pump hopper through a metal pump pipe 16, a discharge port of the small pump hopper is connected with a pouring hopper 19 through a small-caliber glue pump pipe 17, and a discharge port of the pouring material is arranged corresponding to a pouring hole 18.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A self-compacting concrete pouring method for a ground iron plate type turnout is characterized by comprising the following steps:
s100, placing self-compacting concrete into a large pump hopper;
s101, starting a large pump, running at a low speed, and flowing self-compacting concrete in a hopper of the large pump into a hopper of a small pump beside a turnout plate through a metal pump pipe;
s102, when the small pump hopper is full, starting the small pump, enabling the small pump to be in a pumping state, and conveying the self-compacting concrete to a pouring hopper through a small-caliber glue pump pipe;
s103, when waiting to fill the hopper soon, open the discharge gate that fills the hopper, self-compaction concrete is carried to filling the position, accomplishes filling of board-like switch self-compaction concrete.
2. A method for pouring self-compacting concrete for a subway plate type turnout according to claim 1,
the pumping state of the small pump is that the delivery capacity of the small pump is 7-8 m3/h。
3. A method for pouring self-compacting concrete for a subway plate type turnout according to claim 1,
before step s100, water is discharged to the large pump hopper, and the metal pump pipe and the small-caliber glue pump pipe are wetted.
4. A method for pouring self-compacting concrete for a subway plate type turnout according to claim 3,
before wetting the metal pump pipe and the small-caliber glue pump pipe, the self-compacting concrete transported to the discharging position is inspected.
5. A method for pouring self-compacting concrete for a subway plate type turnout according to claim 4,
before or after the self-compacting concrete is inspected,
and obtaining the conveying speed of the small pump according to the preset pouring time of each turnout plate under the conditions of the distance between the discharging position and the turnout plate, the volume of the turnout plate and the vertical conveying distance.
6. A method for pouring self-compacting concrete for a subway plate type turnout according to claim 1,
before step s100, cleaning up the garbage and dust in the cavity at the bottom of the turnout plate, pre-wetting the turnout plate by using a rotary high-pressure gun, and sucking accumulated water by using cotton yarn or sponge.
7. A self-compacting concrete pouring device for a subway plate type turnout, which is characterized by being applied to the self-compacting concrete pouring method for the subway plate type turnout in claims 1 to 6, comprising a large pump provided with a large pump hopper and a small pump provided with a small pump hopper,
the big pump is positioned at the material placing position, the small pump is positioned beside the turnout plate,
the big pump hopper with little pump hopper passes through the metal pump pipe intercommunication, the discharge gate of little pump hopper is connected with the filling hopper through small-bore glue pump pipe, the discharge gate and the filling hole of filling material correspond the setting.
8. The self-compacting concrete pouring device for the subway plate type turnout junction according to claim 7, wherein the big pump is positioned above the small pump.
9. The self-compacting concrete pouring device for the subway plate type turnout according to claim 8,
the vertical conveying height of the small pump is 15-20 m.
10. The self-compacting concrete pouring device for the subway plate type turnout according to claim 8,
the horizontal conveying distance of the small pump is 60-80 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010043132.8A CN111139697A (en) | 2020-01-15 | 2020-01-15 | Self-compacting concrete pouring method and device for subway plate type turnout |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010043132.8A CN111139697A (en) | 2020-01-15 | 2020-01-15 | Self-compacting concrete pouring method and device for subway plate type turnout |
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| Publication Number | Publication Date |
|---|---|
| CN111139697A true CN111139697A (en) | 2020-05-12 |
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| CN202010043132.8A Pending CN111139697A (en) | 2020-01-15 | 2020-01-15 | Self-compacting concrete pouring method and device for subway plate type turnout |
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