CN111185997A

CN111185997A - Jacking vibration-free vertical die forming process for fabricated concrete member

Info

Publication number: CN111185997A
Application number: CN202010041455.3A
Authority: CN
Inventors: 赵志刚; 董铁良; 王群; 刘兴华; 刘静; 刘欣; 常世涛; 王志礼
Original assignee: Beijing Residential Industrialization Group Co ltd; Beijing Yantong Precast Concrete Co ltd
Current assignee: Beijing Residential Industrialization Group Co ltd; Beijing Yantong Precast Concrete Co ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-05-22

Abstract

The invention discloses a vibration-free vertical die forming process for jacking an assembled concrete member, and relates to the technical field of assembled buildings.

Description

Jacking vibration-free vertical die forming process for fabricated concrete member

Technical Field

The invention relates to the technical field of assembly type buildings, in particular to a jacking vibration-free vertical die forming process for an assembly type concrete member.

Background

At present, assembled building components in China are almost produced by adopting flat dies, horizontal workshops and maintenance areas are very large, about half of the outer surfaces of the assembled building components need manual plastering, a large amount of manual work and pre-maintenance equipment are needed, and the pre-maintenance equipment also occupies more horizontal workshop space; the components are dispersedly poured one by the wall boards, and the pouring efficiency and the quality are lower; maintenance is carried out together with maintenance of huge die tables, stacking equipment is huge, and energy consumption is large; the automatic production line has large equipment quantity and large power consumption; when the member is demolded, the member needs to be turned over from a horizontal state to a vertical state, which affects the demolding efficiency of the member and is easy to cause damage to the member. In a word, the horizontal space utilization ratio of a flat die production mode workshop is extremely low due to various conditions, the vertical space is seriously wasted, the productivity of the unit-area workshop is very low, the efficiency of an automatic assembly line is also very low, the energy consumption of equipment and maintenance is high, the pouring time consumption is long, a large amount of manual operation is needed, and the component quality is low.

The vertical mold is adopted to produce the assembled concrete member, the difficulty of compacting and forming the member is increased, and the method is one of the most critical problems which must be broken through. Although the problem can be basically solved by adopting the method of layered vibration or high-throwing self-compacting concrete, the problems of complex process, high difficulty in controlling the forming quality, low efficiency, more workers, unsuitability for adopting automatic equipment and the like exist.

Disclosure of Invention

In order to solve the technical problems, the invention provides a vibration-free vertical die forming process for jacking an assembled concrete member, so that the working requirement and cost of concrete are reduced, the forming quality stability is improved, and the quality control difficulty is reduced.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a jacking vibration-free vertical die forming process for an assembled concrete member, which comprises the following steps of:

firstly, cleaning and assembling a template; cleaning the surface of the template to remove surface adhesives to be smooth and clean without floating, sinking, muck, rust and oil stains; assembling the templates according to template assembly requirements after the templates are cleaned;

secondly, coating a release agent and a retarder; uniformly brushing a release agent on the contact part of the concrete and the template, and brushing a retarder on the template of the rough surface brushing surface part to be manufactured;

thirdly, fixing and assembling the steel reinforcement framework and the side formwork; fixedly assembling the steel reinforcement framework and the side formwork on the vertical formwork;

fourthly, reserving pre-embedded fixation and gap sealing; fixing all the reserved hole forming fixing pieces and the embedded pieces at corresponding positions on the surface of the vertical mold; sealing by sticking a sealing strip on the contact surface of the vertical template and the side edge mold, and sealing the gap between the external leakage steel bar and the vertical template and the side edge mold;

fifthly, closing the dies and locking; closing the vertical templates at two sides, clamping the side templates, and locking the vertical templates after die assembly;

sixthly, preparing self-compacting concrete; the concrete preparation and performance indexes meet the relevant standard requirements and are not isolated and bleeding;

step seven, concrete pumping equipment is prepared and connected through pipelines; checking that the concrete pumping equipment is normal in state, paving a concrete conveying pipeline between a concrete pump and a concrete pouring port on the side formwork, lubricating the conveying pipeline by using a pump lubricant or cement mortar, and connecting the conveying pipeline into a component after the pump lubricant or pipe lubricant mortar is completely discharged;

eighthly, jacking the concrete to form without vibration; uniformly stirring the concrete meeting the requirements, then jacking at a constant speed through a concrete pump to form vibration-free, stopping pumping the concrete until the concrete fills the die cavity and is slightly higher than the upper edge of the template, and closing a concrete check valve at the position of a concrete injection opening to prevent the concrete from flowing backwards;

ninth, concrete pumping equipment and pipelines are cleaned; discharging concrete in a concrete pump receiving hopper, and washing the concrete pump and a conveying pipeline by using water;

tenth step, smearing and coating a retarder; leveling the upper surface of the component, and brushing a demolding retarder on the upper surface when the upper surface requires a rough surface;

step eleven, maintaining; standing for not less than 2h after the concrete is poured, supplying heat through the opposite formwork, and maintaining the wallboard; maintenance heating, constant temperature and cooling are required to meet relevant standard requirements;

twelfth, detaching the mould and lifting; after the concrete strength meets the corresponding requirements through tests, the formwork is removed and the concrete is lifted; when the form is removed and lifted, the wall plate is firstly supported or hung; unlocking the vertical template, separating the vertical template, and dismantling the side template of the wallboard;

step thirteen, scouring; transporting the wallboard to a roughening station, and roughening the part needing to form a rough surface by adopting high-pressure water;

fourteenth, storing; transporting the brushed wallboard to a storage site for storage;

fifteenth, checking; the inspection of the components before leaving the factory is carried out according to the relevant standard requirements;

sixthly, transportation and delivery; the requirements of safety and finished product protection are met.

Optionally, in the fourth step, the fixing member and the embedded member are fixed to the surface of the vertical mold through the magnetic box.

Optionally, in the fourth step, the gap between the external leakage steel bar and the vertical formwork and the gap between the external leakage steel bar and the side formwork are sealed through a rubber ring or a rubber strip.

Optionally, in the sixth step, the requirement of the expansion degree of the concrete is more than or equal to 450 mm.

Optionally, in the eighth step, the uniform-speed jacking vibration-free forming is to pump concrete into the vertical mold from the bottom of the vertical mold through a concrete pump.

Compared with the prior art, the invention has the following technical effects:

according to the assembly type concrete member jacking vibration-free vertical mold forming process, the concrete is jacked from the lower part of the member upwards under pressure, automatic exhaust, compaction and vibration-free forming are realized, the whole casting process is automatically carried out, workers are basically not needed, the casting speed is improved by more than 2 times, the workability requirement and the cost of the concrete are reduced, the requirement of the self-compaction concrete is basically not needed, the forming quality stability is improved, and the quality control difficulty is greatly reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a lift-up vibration-free vertical mold forming process for an assembled concrete member according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1, the present embodiment provides a vibration-free vertical mold jacking process for an assembled concrete member, including the following steps:

fourthly, reserving pre-embedded fixation and gap sealing; fixing all the reserved hole forming fixing pieces and the embedded pieces at corresponding positions on the surface of the vertical mold through the magnetic boxes; sealing is carried out by sticking a sealing strip on the contact surface of the vertical template and the side edge mold, and the gap between the external leakage steel bar and the vertical template and the side edge mold is sealed by a rubber ring or a rubber strip;

sixthly, preparing self-compacting concrete; concrete preparation and performance indexes meet the requirements of relevant specifications, the requirement of the expansion degree is more than or equal to 450mm, and segregation and bleeding cannot occur;

eighthly, jacking the concrete to form without vibration; uniformly stirring the concrete meeting the requirements, then jacking at a constant speed by a concrete pump to form without vibration, namely pumping the concrete into the vertical mould from the bottom of the vertical mould by the concrete pump until the mould cavity is filled with the concrete and is slightly higher than the upper edge of the template, stopping pumping the concrete, closing a concrete check valve at the position of a concrete injection opening, and preventing the concrete from flowing backwards;

The order of the above steps in this embodiment does not represent an actual operation order.

The jacking vibration-free vertical mold forming process of the assembled concrete member solves the difficult problem of vertical mold concrete forming of the assembled member; the efficiency is improved by more than 50 percent; the labor is reduced by 80%, the concrete cost is reduced by 20%, and the quality is improved.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims

1. The utility model provides an assembled concrete member jacking exempts from to shake and founds mould forming technology which characterized in that includes the following step:

tenth step, smearing and coating a retarder; leveling the upper surface of the component, and coating a retarder on the upper surface when the upper surface requires a rough surface;

2. The process of claim 1, wherein in the fourth step, the fixing member and the embedded member are fixed to the surface of the vertical mold through a magnetic box.

3. The process of claim 1, wherein in the fourth step, the gap between the external leaking steel bars and the vertical formwork and the side formwork is sealed by a rubber ring or a rubber strip.

4. The process of claim 1, wherein in the sixth step, the concrete has a required expansion of 450mm or more.

5. The process of claim 1, wherein in the eighth step, the uniform jacking vibration-free forming is performed by pumping concrete into the vertical mold from the bottom of the vertical mold by a concrete pump.