CN113186825A

CN113186825A - Ultra-high performance concrete pavement movable distributing method

Info

Publication number: CN113186825A
Application number: CN202110416074.3A
Authority: CN
Inventors: 商涛平; 王洪新; 龚叶峰; 张杨洋; 宋卿卿
Original assignee: Sucgm Ltd
Current assignee: Sucgm Ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-07-30

Abstract

The invention relates to a movable distributing method for paving ultra-high performance concrete, which is characterized by comprising the following steps: arranging movable feeding equipment on one side of the ultrahigh-performance concrete spreader; when the ultrahigh-performance concrete spreader is used for spreading, the movable feeding device and the ultrahigh-performance concrete spreader move in the same direction and synchronously, and the movable feeding device feeds ultrahigh-performance concrete to the ultrahigh-performance concrete spreader. The invention has the advantages that: the time of transporting the UHPC on the way is saved, the construction period is further shortened, and the loss of the UHPC in the transportation process is also avoided; the stirred UHPC material is directly pumped and distributed, so that the construction performance of the mixture is ensured, and the construction efficiency is greatly improved. The method is particularly suitable for occasions without building a mixing plant on site and transporting UHPC by using a tank truck; UHPC stirring, feeding and UHPC distributing are carried out synchronously, so that the stability of feeding is ensured, the distributing efficiency can be greatly improved, and the loss of UHPC is reduced to the minimum.

Description

Ultra-high performance concrete pavement movable distributing method

Technical Field

The invention relates to the technical field of bridge deck concrete pavement, in particular to a movable distributing method for paving ultrahigh-performance concrete.

Background

At present, the ultra-high performance concrete (UHPC) is widely applied to the pavement of large-span orthotropic steel bridge decks in China. The UHPC is a high-strength high-performance concrete product with high material cost, poor construction performance and short working time; because the material cost is high, but the operating time is short, former mix, transportation and work progress: the mode of mixing materials in a mixing plant → transporting a mixing truck to a construction site → pumping and paving by a pump truck has the following three problems: (1) the UHPC material consists of a gelled material and micron-sized fine aggregate, the water-cement ratio is less than 0.25, and the UHPC material contains steel fibers, so that the traditional stirring station no longer meets the requirements of the blending process of the UHPC, and the blending quality does not reach the standard; (2) the transportation process is tedious, and a large amount of UHPC material with high price can be wasted when the stirring tank car and the pump truck are cleaned each time; (3) from the mixing station to the construction site, the transportation time is uncertain, the problems of viscosity increase, hardening and the like of the UHPC material in the transportation process can exist, and the construction processes of pumping, paving and the like can not be met any more in serious cases. The influence of the existing urban traffic, the transportation time of the stirring-pouring site is long, and the subsequent paving and pouring of the UHPC are influenced.

Disclosure of Invention

The invention aims to provide a movable distributing method for paving ultrahigh-performance concrete, which is characterized in that a movable feeding device is arranged, so that the movable feeding device can synchronously run when the ultrahigh-performance concrete distributor distributes the material, and the problems of large feeding loss in the stirring and feeding processes, too long time in the stirring and discharging-in-situ pouring process of the mixture, influence on construction and the like are effectively solved.

The purpose of the invention is realized by the following technical scheme:

the ultra-high performance concrete pavement movable distributing method comprises an ultra-high performance concrete distributing machine, wherein the ultra-high performance concrete distributing machine is used for distributing ultra-high performance concrete in a construction area, and is characterized in that: arranging movable feeding equipment on one side of the ultrahigh-performance concrete spreader; when the ultrahigh-performance concrete spreader is used for spreading, the movable feeding device and the ultrahigh-performance concrete spreader move in the same direction and synchronously, and the movable feeding device feeds ultrahigh-performance concrete to the ultrahigh-performance concrete spreader.

The movable feeding equipment comprises UHPC stirring and feeding equipment, the UHPC stirring and feeding equipment and the ultra-high performance concrete spreader are erected on the same track, and both the UHPC stirring and feeding equipment and the ultra-high performance concrete spreader can move in the same direction and synchronously along the track.

The UHPC stirring and feeding equipment comprises a truss track plate, wherein a traveling system is arranged at the bottom of the truss track plate, the traveling system can enable the movable continuous feeding platform to move along the distribution direction of the ultra-high performance concrete, an UHPC stirrer, a material storage tank, a hoisting system and a concrete pumping device are arranged on the truss track plate, the hoisting system is used for loading the materials stored in the material storage tank into the UHPC stirrer, a discharge hole of the UHPC stirrer is connected with the concrete pumping device, and the concrete pumping device is used for pumping the stirred UHPC to the ultra-high performance concrete distributor.

A dry mixture transport vehicle is arranged in front of the UHPC stirring and feeding equipment, and the dry mixture transport vehicle stores the UHPC dry mixture; the dry mixture is hung into the material storage box by the hoisting system.

And a steel plate is laid in the driving area in front of the dry mixture transport vehicle.

The movable feeding equipment comprises a concrete pump truck, and the concrete pump truck and the ultrahigh-performance concrete spreader move in the same direction and synchronously and feed materials to the ultrahigh-performance concrete spreader.

A concrete mixer truck is arranged in front of the concrete pump truck, and the concrete mixer truck can supply UHPC to the concrete pump truck.

And a steel plate is paved in the front driving area of the concrete pump truck.

The invention has the advantages that: the stirring and feeding systems of the UHPC are integrated together, and UHPC materials are directly pumped and constructed after being stirred on site, so that the process of establishing a conventional stirring station and using a tank car to convey the UHPC mixture is omitted, the construction cost of the stirring station and the use of the tank car are saved, the construction cost is greatly saved, the time for transporting the UHPC on the way is saved, the construction period is further shortened, and the loss of the UHPC in the transportation process is also avoided; the stirred UHPC material is directly pumped and distributed, so that the construction performance of the mixture is ensured, and the construction efficiency is greatly improved. Is particularly suitable for occasions where no mixing plant is built on site and UHPC is transported by using tank cars.

UHPC stirring, feeding and UHPC distributing are carried out synchronously, so that the stability of feeding is ensured, the distributing efficiency can be greatly improved, and the loss of UHPC is reduced to the minimum.

Drawings

FIG. 1 is a floor plan of the present invention;

FIG. 2 is a schematic structural view of a UHPC blending and feeding device of the present invention;

FIG. 3 is a top view of FIG. 2;

fig. 4 is another floor plan of the present invention.

Detailed Description

The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:

as shown in fig. 1-4, the labels 1-35 are respectively shown as: a traveling track 1, a UHPC stirring and feeding device 2, an ultra-high performance concrete spreader 3, a dry mix transport vehicle 4, a spreader hopper 5, a reinforcing mesh and stud 6, a steel plate 7, a steel curb 8, a UHPC stirrer 9, an intelligent control system 10, a hoisting system 11, a dry mix storage tank 12, a steel fiber storage tank 13, a mixing water tank 14, a liquid admixture storage tank 15, a mixing water metering pump 16, a liquid admixture 17 and a concrete conveying pump 18, the system comprises a traveling system 19, a discharging port 20, an operating platform 21, a support 22, a rail guardrail 23, a feed hopper 24, a motor system 25, a labor protection product warehouse 26, a tool warehouse 27, a small water tank 28, a concrete mixer truck 29, a concrete pump truck 30, an UHPC paving layer 31, an ultra-high performance concrete leveling machine 32, an ultra-high performance concrete film coating machine 33, an ultra-high performance concrete troweling machine 34 and a truss rail plate 35.

The first embodiment is as follows: the movable distribution method for the ultra-high performance concrete pavement in the embodiment is used for realizing the relatively close synchronous feeding of the ultra-high performance concrete distributor during distribution, and effectively solves the problems that the feeding loss is large in the stirring and feeding processes, the time is too long in the mixing material stirring and discharging-in-situ pouring process, the construction is influenced and the like.

As shown in fig. 1, a running rail 1 is arranged in a construction site in a direction of laying UHPC, taking the construction site as a steel deck as an example. The outer side of the steel bridge deck is provided with a steel curb 8, and the walking track 1 is laid on the inner side of the steel curb 8 and arranged along the bridge direction of the steel bridge deck. A UHPC stirring and feeding device 2 and an ultra-high performance concrete spreader 3 are erected on the walking track 1, and both can move along the walking track 1 and can form synchronous movement. The UHPC stirring and feeding device 2 is used for supplying the UHPC processed and manufactured by the UHPC stirring and feeding device to a distributing machine hopper 5 of the ultrahigh-performance concrete distributing machine 3, and the ultrahigh-performance concrete distributing machine 3 is used for realizing UHPC distributing on the surface of a steel bridge deck. A dry mixture transport vehicle 4 is arranged in front of the UHPC stirring and feeding device 2, and the dry mixture transport vehicle 4 is used for storing dry mixtures required by the UHPC stirring and feeding device 2 in the process of processing and manufacturing UHPC. In order to avoid the influence of the dry mix transport vehicle 4 on the mesh reinforcement and the studs 6 laid on the steel deck during driving, a steel plate 7 is laid in the driving area in front of the dry mix transport vehicle to avoid the damage of the dry mix transport vehicle 4 on the mesh reinforcement and the studs 6.

In this embodiment, the UHPC mixing and feeding device 2 and the dry mix transportation vehicle 4 are combined to form a movable feeding device of the ultra-high performance concrete spreader 3. When the UHPC mixing and feeding device 2 has enough storage space, namely the UHPC mixing and feeding device 2 can store the UHPC dosage which meets the requirement of the ultra-high performance concrete spreader 3, the dry mixture transport vehicle 4 is not needed, and only the UHPC mixing and feeding device 2 is used.

As shown in fig. 2 and fig. 3, the main body of the UHPC mixing and feeding device 2 in this embodiment includes a truss track plate 35, the truss track plate 35 is used as an arrangement area for each functional device, and operation platforms 21 are provided on both sides of the truss track plate 35 for operators to perform mixing and feeding operations. A walking system 19 is arranged at the bottom of the truss track plate 35; under the drive of the traveling system 19, the whole feeding platform can move along the traveling track 1, and the moving speed and the moving direction of the feeding platform can be controlled to enable the feeding platform and the ultra-high performance concrete distributor 3 to move synchronously, so that the on-site mixing and distribution of the UHPC can be carried out synchronously, the transport distance of the UHPC is effectively shortened, and the construction quality of the UHPC is effectively improved.

As shown in FIG. 2, a dry powder storage tank 12 for storing each raw material of UHPC, a steel fiber storage tank 13, a blending water tank 14 and a liquid admixture storage tank 15 are provided on a truss track plate 35, wherein the dry powder storage tank 12 is used for storing dry UHPC, the steel fiber storage tank 13 is used for storing steel fibers for UHPC, the blending water tank 14 is used for storing blending water used in the manufacture of UHPC, and the liquid admixture storage tank 15 is used for storing admixtures such as water reducing agent, plasticizer, retarder, early strength admixture and the like used in the manufacture of UHPC.

As shown in fig. 3, in this embodiment, a small water tank 28 is disposed on the truss track plate 35, the small water tank 28 is connected to the mixing water tank 14, and the mixing water stored in the mixing water tank 14 is pumped into the small water tank 28 and then pumped into the UHPC mixer 9 from the small water tank 28, so as to precisely control the water amount.

As shown in fig. 2, a UHPC mixer 9 and a hoist system 11 are provided on the truss track plate 35. Wherein the UHPC mixer 9 is communicated with a mixing water tank 14 and a liquid admixture storage tank 15 through pipelines, so that the mixing water and the liquid admixture can be supplied to the inside of the UHPC mixer 9 through the pipelines. The mixing water tank 14 is provided with a mixing water metering pump 16, the mixing water can enter the interior of the UHPC mixer 9 under the pumping action of this mixing water metering pump 16, and the water supply thereof is precisely controlled by the mixing water metering pump 16. Likewise, the liquid admixture storage tank 15 is provided with a liquid admixture metering pump 17, and the liquid admixture can be fed into the inside of the UHPC mixer 9 by the pumping of the liquid admixture metering pump 17 and the amount thereof can be precisely controlled. The hoist system 11 is used to hoist the UHPC dry powder from the dry powder storage bin 12 and the steel fibers in the steel fiber storage bin 13 through a feed hopper 24 into the UHPC blender 9. The UHPC stirrer 9 can drive the stirring blades thereof to fully stir the UHPC dry powder, the steel fibers, the stirring water and the admixture which are put into the UHPC stirrer by the motor system 25, thereby processing and manufacturing the UHPC on a construction site.

As shown in fig. 2, a concrete delivery pump 18 is provided at a position of a discharge port 20 of the UHPC mixer 9, and the UHPC finished product discharged from the discharge port 20 is directly discharged into the concrete delivery pump 18 and pumped into the ultra-high performance concrete distributor 3 by the concrete delivery pump 18 for distribution of the UHPC. In this embodiment, a guide plate arranged obliquely downward may be provided at the position of the discharge port 20 to guide the UHPC finished product into the concrete delivery pump 18.

As shown in figure 2, in order to avoid the influence of the vibration of the UHPC mixer 9 during mixing on the stability of the truss track plate 35, a support 22 is arranged at the bottom of the UHPC mixer 1, and the support 22 supports the UHPC mixer 9 and lifts the UHPC mixer from the truss track plate 35 by a certain height, thereby ensuring the use safety.

As shown in FIG. 2, UHPC blender 9 is provided with an intelligent control system 10, and the intelligent control system 10 is operably connected to control the operating state of the UHPC blender 9 to process and produce UHPC with different parameter requirements. In this embodiment, the intelligent control system 10 may further be connected to and control the mixing water metering pump 16 and the liquid admixture metering pump 17 to respectively adjust the mixing water and the liquid admixture usage amounts.

As shown in fig. 2, rail guards 23 are provided on both sides of the feeding platform for the safety of the operator. As shown in fig. 1, a work storage 26 and a tool storage 27 are further provided at one side of the truss track plate 35 for storing work and tools used in the corresponding area.

In this embodiment, since a plurality of admixtures can be stored in the liquid admixture storage tank 15, the amount of each admixture can be precisely controlled by piping or by providing a plurality of liquid admixture metering pumps 17.

The UHPC dry powder stored in the dry powder storage bin 12 may be in standard packaging for ease of dosing control during lifting by the lifting system 11. The steel fibers in the fiber storage tank 13 can be stacked in the same manner for quantitative control.

The traveling system 19 may employ some existing traveling driving mechanisms, for example, including a driving motor and a roller, and a guide rail is laid in the construction site, so that the guide rail moves in the direction of the guide rail under the driving of the driving motor.

In practical construction, the present embodiment includes the following steps:

1) before construction, stirring and feeding equipment is sequentially arranged on the truss track plate 35, the intelligent control system 10 of the UHPC stirrer 9 is adjusted after the installation is finished, the rotating speed and the time of the stirrer are adjusted according to construction requirements, and the water consumption, the additive adding amount and the steel fiber doping amount are adjusted according to material proportion.

2) The hoisting system 11 hoists the premixed dry powder from the dry powder storage box 12 to a feeding port, constructors put the dry powder into a feeding hopper, the feeding is 1t of heavy material bags each time, the feeding port is closed, and the powder enters the main machine 9 of the stirrer to be stirred; an electric protection device can be arranged above the powder stirring equipment and is used for sealing the feed opening.

Give 2 supplementary dry mixtures of UHPC stirring feeder equipment through dry mixtures transport vechicle 4, supplementary mode can be divided into two kinds: can be supplemented laterally; it can also be supplemented in the same direction, as shown in fig. 1, a steel plate 7 is laid on the reinforcing mesh and the stud 6, and the dry mixture is transported to the front by the dry mixture transport vehicle 4. The packaged dry powder is hoisted into the dry powder storage box 12 by the hoisting system 11.

3) The liquid admixture in the left liquid admixture storage tank 15 enters the UHPC mixer 9 through a conveying pipeline which is connected with a liquid admixture metering pump 17, and the addition amount of the admixture can be preset.

4) When water enters, the automatic metering device is arranged on the left mixing water tank 14, the water flows into the small water tank 28 through a water pipe according to the preset water adding quality, at the moment, a constructor needs to check the water quantity in the small water tank again, and then the water in the small water tank 28 is transported into the UHPC stirrer 9 through a pipeline by adopting a water pump.

5) The steel fiber in the ultra-high performance concrete can be added into the powder in advance, and can also be added into the UHPC mixer 9 through the right steel fiber storage tank 13, and similarly, an automatic metering device can also be arranged at the steel fiber storage tank 13 to measure the weight of the steel fiber, and the steel fiber mixing amount can be controlled through the preset steel fiber adding quality.

6) After the stirring is completed, firstly sampling is carried out on the mixture for slump expansion and other performance tests, when the design requirements are met, the mixture is unloaded into the concrete conveying pump 18 of the lower layer, and the mixture is pumped to the distributing machine hopper 5 of the ultrahigh-performance concrete distributing machine 3 through the pump pipe for construction and paving.

7) As shown in fig. 1, when the ultra-high performance concrete distributor 3 moves on the traveling rail 1 and distributes the material, the UHPC mixing and feeding device 2 disposed in front of the ultra-high performance concrete distributor moves on the traveling rail 1 by the driving of the traveling system 19, and both devices always move synchronously, so that the UHPC mixing and feeding device 2 continuously supplies the ultra-high performance concrete distributor 3.

In the embodiment, the UHPC adopts a full-automatic gear type ultra-high performance concrete spreader 3 to spread the materials, and the ultra-high performance concrete spreader 3 can walk along the bridge direction of the steel bridge deck; the hopper 5 of the distributing machine is erected on a transverse track of the ultra-high performance concrete distributing machine 3 to transversely walk, the ultra-high performance concrete distributing machine 3 can realize full-bridge-deck distribution, and the regions and the leftover materials which cannot be reached adopt artificial distribution.

Example two: as shown in fig. 4, the difference between the first embodiment and the second embodiment is: in this embodiment, the movable feeding device is a concrete mixer truck 29 and a concrete pump truck 30, which are connected to each other. The concrete mixer truck 29 is used for processing and manufacturing ultra-high performance concrete and supplying the ultra-high performance concrete to the concrete pump truck 30, and the concrete pump truck 30 pumps the ultra-high performance concrete to the distributing machine hopper 5 of the ultra-high performance concrete distributing machine 3 through a pipeline. The concrete mixer truck 29 and the concrete pump truck 30 can run in front of the ultra-high performance concrete distributor 3 and move in the same direction and synchronously with the ultra-high performance concrete distributor so as to improve the construction quality of UHPC.

In this embodiment, an ultra-high performance concrete leveling machine 32, an ultra-high performance concrete coating machine 33, and an ultra-high performance concrete troweling machine 34 are sequentially disposed behind the ultra-high performance concrete spreader 3 in the laying direction, so as to perform operations such as leveling, spray coating maintenance, and troweling on the spread UHPC paved layer 13, thereby improving the paving quality of the ultra-high performance concrete.

Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, they are not to be considered repeated herein.

Claims

1. The ultra-high performance concrete pavement movable distributing method comprises an ultra-high performance concrete distributing machine, wherein the ultra-high performance concrete distributing machine is used for distributing ultra-high performance concrete in a construction area, and is characterized in that: arranging movable feeding equipment on one side of the ultrahigh-performance concrete spreader; when the ultrahigh-performance concrete spreader is used for spreading, the movable feeding device and the ultrahigh-performance concrete spreader move in the same direction and synchronously, and the movable feeding device feeds ultrahigh-performance concrete to the ultrahigh-performance concrete spreader.

2. The ultra-high performance concrete pavement movable cloth method according to claim 1, characterized in that: the movable feeding equipment comprises UHPC stirring and feeding equipment, the UHPC stirring and feeding equipment and the ultra-high performance concrete spreader are erected on the same track, and both the UHPC stirring and feeding equipment and the ultra-high performance concrete spreader can move in the same direction and synchronously along the track.

3. The ultra-high performance concrete pavement movable cloth method according to claim 2, characterized in that: the UHPC stirring and feeding equipment comprises a truss track plate, wherein a traveling system is arranged at the bottom of the truss track plate, the traveling system can enable the movable continuous feeding platform to move along the distribution direction of the ultra-high performance concrete, an UHPC stirrer, a material storage tank, a hoisting system and a concrete pumping device are arranged on the truss track plate, the hoisting system is used for loading the materials stored in the material storage tank into the UHPC stirrer, a discharge hole of the UHPC stirrer is connected with the concrete pumping device, and the concrete pumping device is used for pumping the stirred UHPC to the ultra-high performance concrete distributor.

4. The ultra-high performance concrete pavement movable cloth method according to claim 3, characterized in that: a dry mixture transport vehicle is arranged in front of the UHPC stirring and feeding equipment, and the dry mixture transport vehicle stores the UHPC dry mixture; the dry mixture is hung into the material storage box by the hoisting system.

5. The ultra-high performance concrete pavement movable cloth method according to claim 4, characterized in that: and a steel plate is laid in the driving area in front of the dry mixture transport vehicle.

6. The ultra-high performance concrete pavement movable cloth method according to claim 1, characterized in that: the movable feeding equipment comprises a concrete pump truck, and the concrete pump truck and the ultrahigh-performance concrete spreader move in the same direction and synchronously and feed materials to the ultrahigh-performance concrete spreader.

7. The ultra-high performance concrete pavement movable cloth method according to claim 6, characterized in that: a concrete mixer truck is arranged in front of the concrete pump truck, and the concrete mixer truck can supply UHPC to the concrete pump truck.

8. The ultra-high performance concrete pavement movable cloth method according to claim 6, characterized in that: and a steel plate is paved in the front driving area of the concrete pump truck.