CN116771122A - A construction method for a T-shaped cantilevered unloading platform in a C-shaped material yard - Google Patents

Abstract

The invention relates to a construction method of a T-shaped cantilevered unloading platform in a C-type material yard, which includes the following steps: 1. Install the rack, and use a crane on the upper track platform of the scraper to install the rack unit according to the plan drawings; 2. Set up the formwork body, surrounding the structural columns of the T-shaped cantilever beam, and install the formwork body on the Bailey frame body through the set I-beam connecting beams and U-shaped bolts; 3. Install the main and secondary keels , install the main keel and secondary keel on the formwork frame; 4. Pour the concrete. After all installations are completed and the inspection is qualified, the steel bar team is delivered to the steel bar installation and binding operation. After acceptance, the platform concrete is poured and it is qualified. Then remove the formwork body. The advantage of this invention is that compared with the traditional floor-standing full-hall support frame construction by using Bailey frames, 2/3 of the frame body is saved, the construction progress is improved, and it conforms to the green construction concept; T-shaped cantilever beam structural columns are used for construction The erection of the Bailey frame formwork body provides construction safety.

Description

A construction method for a T-shaped cantilevered unloading platform in a C-shaped material yard

Technical field

The invention relates to the technical field of building construction, and in particular to a construction method of a C-shaped reinforced concrete T-shaped cantilevered unloading platform in a C-shaped material yard.

Background technique

At present, the C-type material yard has been widely used in the metallurgical industry in recent years due to its advantages such as large material storage capacity, space saving, flexible and reliable operation, and good environmental protection effect.

The C-type material yard unloading platform is generally a reinforced concrete T-shaped cantilever structure. The overhang length is large, the formwork height is extremely high, and the concrete platform has a heavy load. This is a major and difficult point in the construction of the C-type material yard. It is a super-hazardous large-scale project and requires Organize expert arguments. The C-type material yard unloading platform formwork support system generally adopts floor-standing full-hall ordinary fastener-type steel pipe scaffolding and floor-standing full-hall socket-disc buckle type scaffolding.

Due to the high height and long length of the unloading platform, usually the height can reach about 30m and the length is generally about 500m. Floor-standing full-length ordinary fastener-type steel pipe scaffolding is used as the C-type material yard unloading platform formwork support. The amount of material is large and the construction is difficult. The cycle is long, the risk factor is high, and safety is not easy to ensure; when using floor-standing full-floor socket-in-disk buckle scaffolding as the C-type material yard unloading platform formwork support frame, the safety performance is guaranteed, but the amount of scaffolding is huge, the cost is high, and the construction period long.

Contents of the invention

In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a construction method for a T-shaped cantilevered unloading platform in a C-shaped material yard, including:

Step 1. Install the rack, and use a crane on the upper rail platform of the scraper to install the rack unit according to the plan drawings;

Step 2: Set up the formwork body, surrounding the structural columns of the T-shaped cantilever beam, and install the formwork body on the Bailey frame body through the provided I-beam connecting beams and U-shaped bolts;

Step 3: Install the main and secondary keels, and install the main and secondary keels on the formwork body;

Step 4: Pour concrete. After all installations are completed and the inspection is qualified, the steel bar team will be handed over to install and tie the steel bars. After passing the inspection, the platform concrete will be poured. After passing the inspection, the formwork body will be removed.

Further, in step one, when installing the bailey frame, use the upper track bolts to fix it, use the structural column of the T-shaped cantilever beam as the pull-up fixed point of the bailey frame unit, and install the pull-up wire rope.

Further, in the second step, before erecting the formwork body, install the I-beam connecting beam, use U-shaped bolts to fix it with the bailey frame, and weld a vertical pole at the top of each vertical pole on the I-beam connecting beam. Directional steel bars are used to facilitate insertion when erecting the formwork body.

Furthermore, after the installation of the I-beam connecting beams is completed, scaffolding boards and templates are used to seal the gaps between the I-beam connecting beams to form hard protection.

Further, in the second step, the erection method of the formwork body includes: installing vertical poles, horizontal poles, vertical diagonal braces, horizontal scissor braces and column holding measures around the I-beam connecting beams, and the bottom of the beam adopts double grooves. Steel joist supports.

Furthermore, in the second step, a triangular support is installed on the outside of the formwork body as external protection during construction operations.

Further, in the second step, a U-shaped bracket is provided on the top of the vertical pole, and the height of the U-shaped bracket is adjusted according to the elevation.

Further, in the second step, an anti-fall net is installed below the working surface.

Further, in the fourth step, the concrete pouring method is: using two pump trucks to pour symmetrically from the middle to both sides at the same time.

Further, in the first step, before installing the rack, the racks are assembled on the ground into a unit of the rack, with 18 racks being one unit.

To sum up, the beneficial technical effects of the present invention are: the present invention proposes a construction method for a T-shaped cantilevered unloading platform in a C-shaped material yard. By using Bailey frames, compared with the construction of traditional floor-standing full-hall support frames, the present invention 2/3 of the frame is saved (the formwork height of the traditional frame is about 30m, the formwork height of the present invention is about 10m), which improves construction safety and construction progress, conforms to the green construction concept; and utilizes the T-shaped cantilever beam structure The columns are used to erect the Bailey frame and the formwork body, which provides safety during the construction process.

Description of drawings

The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings. The drawings are for the purpose of illustrating preferred embodiments only and are not to be construed as limitations of the invention. Also throughout the drawings, the same reference characters are used to designate the same components.

Figure 1 is a schematic flow chart of the construction method of the present invention;

Figure 2 is the construction structure diagram 1 of the Bailey frame in the present invention;

Figure 3 is the second structural diagram of the construction of the Bailey frame in the present invention;

Figure 4 is the third structural diagram of the construction of the Bailey frame in the present invention;

Figure 5 is a structural diagram of the construction process of the formwork body in the present invention;

Figure 6 is the second structural diagram of the construction process of the formwork body in the present invention;

Figure 7 is the third structural diagram of the construction process of the formwork body in the present invention;

Figure 8 is a structural diagram 4 of the construction process of the formwork body in the present invention;

Figure 9 is a schematic diagram of the construction structure of the primary and secondary dragon frames in the present invention;

Figure 10 is a schematic diagram 2 of the construction structure of the primary and secondary dragon skeleton in the present invention;

Figure 11 is a schematic diagram of the concrete pouring method in the present invention;

In the picture, 1. Bailey frame unit, 2. Upper track bolts, 3. Pull-up wire rope, 4. I-beam connecting beam, 5. U-shaped bolts, 6. Vertical steel bars, 7. Vertical poles, 8. Scaffolding, 9. Formwork, 10. Horizontal pole, 11. Vertical diagonal brace, 12. Horizontal scissor brace, 13. Column holding measures, 14. Double channel steel joist support, 15. U bracket, 16. Triangular bracket, 17. Anti-fall net, 18, main keel, 19, secondary keel.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a thorough understanding of the disclosure, and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

Referring to Figure 1 , a construction method for a T-shaped cantilevered unloading platform in a C-shaped material yard disclosed by the present invention includes: Step 1: Install the Bailey frame, and install it on the upper track platform of the scraper using a crane according to the plan drawings. Bailey frame unit; Step 2: Set up the formwork body around the structural columns of the T-shaped cantilever beam, and install the formwork body on the Bailey frame body through the set I-beam connecting beams and U-shaped bolts ; Step 3, install the main and secondary keels, and install the main keels and secondary keels on the formwork frame; Step 4, pour the concrete. After all installations are completed and the inspection is qualified, deliver the steel bars to the steel bar team for installation and binding of steel bars. , after the acceptance is passed, the platform concrete is poured, and the formwork body is removed after passing the inspection.

The most preferred embodiment of this construction method is as follows (see Figure 2-11)

1. Construction preparation

Construction machinery and tools, operating conditions and labor preparation, and assembly of the Bailey frame. The Bailey pieces are assembled on the ground into a Bailey frame unit, with 18 Bailey pieces as one unit. Among them, the Bailey frame is used. In terms of construction cost, the cost of the Bailey frame support system only accounts for 70% of the cost of the steel pipe scaffolding support system; in terms of construction period, the time to install and dismantle the Bailey frame support system is also very short. The construction period can be greatly shortened; in addition, the use of the Bayley support system can provide construction workers with a larger working space. Its stability is also very high, which can reduce the probability of safety accidents. In this embodiment, the use of Bailey frames saves 2/3 of the frame body. The formwork height of the traditional frame body is about 30m, while the formwork height of the present invention is about 10m, which improves construction safety and construction progress, and conforms to the green construction concept.

2. Install the Bailey rack

Use a crane on the upper rail platform of the scraper to install the Bailey frame unit 1 according to the plan drawing; the Bailey frame unit is fixed with the upper track bolts 2; use the cast structural column as the pull-up fixed point of the Bailey frame unit to install the pull-up wire rope 3. Referring to Figure 2, in this embodiment, the structural columns of T-shaped cantilever beams are used to erect the Bailey frame and the formwork body, which provides safety during the construction process.

3. Install I-beam connecting beams and install hard protection

Install the I-beam connecting beam 4 according to the plan layout of the support frame; use U-shaped bolts 5 to fix it with the Bailey frame 1; weld a vertical steel bar 6 at the position of each vertical pole on top of the steel beam 4. When setting up the formwork The vertical poles 7 are inserted into the steel bars to prevent the vertical poles from shifting; after the coupling beams are installed, scaffolding boards 8 and templates 9 are used to seal the gaps between the coupling beams to form hard protection; refer to Figure 3-5.

4. Set up the formwork body

Install vertical poles 7, horizontal poles 10, vertical diagonal braces 11, horizontal scissor braces 12 (not shown in the drawings) and column holding measures 13 on the I-beam connecting beam. The bottom of the beam is supported by double channel steel joists 14. Adjust the height of the top U bracket 15 according to the elevation, install a triangular bracket 16 on the outside of the frame as external protection during construction operations, and install an anti-fall net 17 below the working surface, as shown in Figure 5-8.

5. Install primary and secondary keels and templates

Install main keel 18, secondary keel 19 and template 9, as shown in Figure 9-10.

6. Inspection and acceptance, steel bar installation

After all installations are completed, check whether all parameters comply with the plan and specification requirements. Once the requirements are met, the steel bar team will be handed over to install and tie the steel bars.

7. Pouring concrete

After the steel bars are installed and tied, and after passing the acceptance inspection, the concrete for the platform should be poured. During pouring, two pump trucks should be used to pour symmetrically from the middle to both sides at the same time to prevent uneven loads from affecting construction safety, as shown in Figure 11.

8. Concrete maintenance

After the pouring is completed, the concrete shall be cured in strict accordance with the construction specifications.

9. Dismantling the formwork and frame

Only when the strength of the concrete test block under the same conditions reaches 100% can the formwork and scaffolding be dismantled. During disassembly, the relevant operating procedures and specifications must be strictly followed.

The embodiment of the present invention discloses a construction method for a T-shaped cantilevered unloading platform in a C-type material yard, which has the following advantages: by using the Bailey frame, the present invention saves 2/3 compared with the construction of the traditional floor-standing full-hall support frame. The frame body (the formwork height of the traditional frame body is about 30m, the formwork height of the present invention is about 10m), which improves construction safety and construction progress, conforms to the green construction concept; and uses the structural columns of T-shaped cantilever beams to carry out the Bailey frame The erection with the formwork body provides safety during the construction process.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations are mutually exclusive. any such actual relationship or sequence exists between them. Furthermore, the terms "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article, or apparatus that includes the stated element.

Finally, it should be noted that: obviously, the above-mentioned embodiments are only examples to clearly illustrate the present invention, and are not intended to limit the implementation. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. An exhaustive list of all implementations is neither necessary nor possible. However, obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims (10)

1. The construction method of the T-shaped cantilever unloading platform of the C-shaped material field is characterized by comprising the following steps of:

firstly, installing a bailey frame, and installing a bailey frame unit on an upper track platform of a scraper machine by using a crane according to a scheme drawing;

step two, erecting a support die frame body, surrounding a structural column of the T-shaped cantilever beam, and installing the support die frame body on the bailey frame body through the arranged I-shaped steel connecting beam and the U-shaped bolt;

step three, installing a main keel and an auxiliary keel, and installing the main keel and the auxiliary keel on the formwork support body;

and fourthly, pouring concrete, after all installation is completed, and after inspection is qualified, delivering a reinforcing steel bar team to perform reinforcing steel bar installation binding operation, after inspection is qualified, pouring platform concrete, and after the inspection is qualified, removing the formwork body.

2. The construction method of the T-cantilever unloading platform of the C-shaped stock yard according to claim 1, wherein in the first step, when the bailey frame is installed, the bailey frame is fixed by using upper track bolts, and a structural column of the T-shaped cantilever beam is used as a pull-up fixing point of the bailey frame unit, so that a pull-up steel wire rope is installed.

3. The construction method of the T-shaped cantilever unloading platform of the C-shaped stock yard according to claim 1, wherein in the second step, before the formwork support body is erected, an I-shaped steel connecting beam is installed, the I-shaped steel connecting beam is fixed with the bailey frame by utilizing a U-shaped bolt, and a vertical steel bar is welded at the position of each upright rod on the top of the I-shaped steel connecting beam and is convenient to be sleeved when the formwork support body is erected.

4. The construction method of the T-shaped cantilever unloading platform of the C-shaped stock yard of claim 3, wherein after the installation of the I-shaped steel connecting beams is completed, gaps among the I-shaped steel connecting beams are blocked by adopting a scaffold board and a template, so that hard protection is formed.

5. The construction method of the T-shaped cantilever unloading platform of the C-shaped stock ground of claim 1, wherein in the second step, the erecting method of the formwork support comprises the following steps: the beam bottom is supported by a double-groove steel joist by means of installing a vertical rod, a horizontal rod, a vertical diagonal brace, a horizontal scissor brace and a column holding measure around the I-steel continuous beam.

6. The construction method of the T-shaped cantilever unloading platform of the C-shaped stock yard of claim 5, wherein in the second step, a triangular bracket is further arranged on the outer side of the formwork support body to serve as an outer protection of construction operation.

7. The construction method of the T-shaped cantilever unloading platform of the C-shaped stock yard of claim 5, wherein in the second step, a U-shaped support is arranged at the top of the upright rod, and the height of the U-shaped support is adjusted according to elevation.

8. The construction method of the T-shaped cantilever unloading platform of the C-shaped stock yard of claim 5, wherein in the second step, an anti-falling net is arranged below a working surface.

9. The construction method of the T-shaped cantilever unloading platform of the C-shaped stock yard of claim 1, wherein in the fourth step, the concrete pouring method is as follows: and (5) symmetrically pouring the two pump trucks from the middle to the two sides at the same time.

10. The construction method of the T-cantilever unloading platform of the C-shaped stock yard according to claim 1, wherein in the first step, before the bailey frame is installed, the bailey pieces are assembled into a bailey frame unit on the ground, and 18 bailey pieces are assembled into one unit.