CN116145721A - A rapid construction method of semi-prefabricated buttress retaining wall - Google Patents

Abstract

The invention discloses a quick construction method of a semi-prefabricated wall-supporting retaining wall, belonging to the technical field of civil construction; the method comprises the following steps: s1, prefabricating a buttress in a factory; s2, pouring a bottom plate and a vertical wall on a construction site; s3, installing the prefabricated buttress, and pouring wet joints between the prefabricated buttress and the vertical wall. According to the invention, standard module construction and abnormal module construction are combined, and the cast-in-situ structure and the prefabricated construction are matched, so that the engineering progress can be accelerated, the investment of manpower and materials can be reduced, and the pollution to the environment can be reduced.

Description

A rapid construction method of semi-prefabricated buttress retaining wall

technical field

The invention relates to the technical field of civil construction, in particular to a rapid construction method of a semi-prefabricated buttress-type retaining wall.

Background technique

Buttress retaining wall is a kind of thin-walled reinforced concrete retaining wall, which is generally composed of base plate, vertical wall, buttress and other main parts. Its structure is simple, its own weight is light, it can resist large water pressure and earthquake force, and effectively prevent the soil from sliding; moreover, the size of the buttress can be adjusted according to needs to adapt to different terrains, and it has been widely used.

At present, the commonly used construction methods of buttress retaining walls include integral pouring and prefabricated assembly.

The cast-in-place method requires construction procedures such as steel bar binding, formwork installation and reinforcement, and concrete pouring; especially the buttress structure of the retaining wall is a thin-walled special-shaped variable-section structure, which is time-consuming in the process of steel bar binding and formwork installation, which is not conducive to rapid construction . If the prefabricated assembly process is adopted, the overall stability of the structure is relatively insufficient.

Based on engineering experience, combined with the commonly used prefabricated module design and construction technology, and comprehensively considering the overall strength and construction efficiency, the applicant specially improved and designed this construction method.

Contents of the invention

The purpose of the present invention is to solve the problem of some deficiencies in the construction of the buttress-type retaining wall in the prior art, and proposes a quick construction method for the semi-prefabricated buttress-type retaining wall.

In order to achieve the above object, the present invention adopts the following technical solutions:

A semi-prefabricated buttress type retaining wall rapid construction method, comprising the following steps:

S1. Factory prefabricated buttresses;

S2. Pouring the floor and vertical walls at the construction site;

S3. Install the prefabricated buttress, and pour the wet joint between the prefabricated buttress and the vertical wall.

In some embodiments, rib insertion holes are reserved at the bottom of the prefabricated buttress;

Reserved ribs corresponding to the prefabricated buttresses are set on the base plate.

In some embodiments, the side of the prefabricated buttress is provided with a grouting hole communicating with the reserved reinforcement hole;

In step S3, inject grout through the grout hole.

In some embodiments, reserved hook ribs are respectively provided on the joint surfaces of the vertical wall and the prefabricated buttress.

In some embodiments, in step S2, the following steps are included:

S201. Base plate construction: construct base plate steel bars, set reserved bars at the junction with the buttress structure, and pour base plate concrete;

S202. Standing wall construction: install steel bars for the standing wall structure, set reserved hook bars at the junction with the buttress structure, and pour concrete for the standing wall in layers to the top level of the standing wall structure.

In some embodiments, in step S3, the following steps are included:

S301. Buttress assembly: according to the positioning of the reserved ribs and the reserved rib holes, place the prefabricated buttress on the reserved ribs;

S302. Formwork installation: install the formwork at the junction of the prefabricated buttress and vertical wall;

S303. Wet joint cast-in-place: pour fine stone concrete with the same grade as the structure in layers, and the height of the layer is not more than 0.5 meters. The concrete is vibrated and compacted, poured to the design top elevation, and maintenance, formwork removal, etc. are done well;

S304. Grouting reinforcement: inject cement slurry through the grouting hole reserved on the bottom side of the prefabricated buttress, so that the prefabricated buttress and the bottom plate are combined into a whole.

In some embodiments, the outer side of the reserved rib is poured with a raised platform;

The lower end of the prefabricated buttress is provided with a notch adapted to the raised platform.

In some embodiments, in step S3, pouring reinforcement columns is also included;

In step S302, a formwork is installed at the junction of the prefabricated buttress and the vertical wall;

In step S303, the reinforcement column is poured integrally with the wet joint.

In some embodiments, the reinforcing column is a square column or a triangle covering the wet joint or the outside of the prefabricated buttress.

In some embodiments, the ends of the prefabricated buttresses are provided with reinforcing column binding ribs.

Compared with the prior art, the present invention provides a rapid construction method for semi-prefabricated buttress-type retaining walls, which has the following beneficial effects.

1. The present invention adopts the combination of standard module construction and special-shaped module construction, and the matching of cast-in-place structure and prefabricated construction, which can speed up the project progress, improve construction efficiency and project quality, reduce labor and material input, and reduce environmental pollution.

2. In the present invention, the buttress structure is prefabricated in the factory in advance to avoid quality defects such as honeycomb, pockmarked surface, holes, and missing bars during the cast-in-place process, which can not only ensure the appearance quality of the concrete, but also meet the strength requirements; the horizontal joints are reserved Reinforcing by inserting reinforcement and grouting, the vertical direction adopts the construction technology of reserved reinforced concrete and pouring concrete grade fine stone concrete to ensure the stability of the prefabricated buttress 1; pouring reinforcement columns 10 makes the vertical wall 3 and the prefabricated buttress 1 fully combined to provide greater support noodle.

Other advantages, objects and features of the present invention will be set forth in the following description to some extent; and will be obvious to those skilled in the art based on the investigation and research below to some extent; or , can be taught from the practice of the present invention.

Description of drawings

Figure 1 is a schematic diagram of the prior art.

Fig. 2 is a structural schematic diagram of the present invention.

Figure 3 is a schematic diagram of the structure before pouring wet joints.

Figure 4 is a schematic side view of the structure before pouring the wet joint.

Fig. 5 is a schematic structural view of a state where prefabricated buttresses are not installed.

Fig. 6 is a schematic diagram of the lower side structure of the prefabricated buttress.

Fig. 7 is a structural schematic diagram of the state where the raised platform is set.

Fig. 8 is a structural schematic diagram of the state of setting the triangular reinforced column in rotation.

Fig. 9 is a structural schematic diagram of a state where a square column reinforcing column is set.

Figure 10 is a schematic diagram of the structure before pouring the reinforcement column.

FIG. 11 is a schematic diagram of an enlarged structure at point A in FIG. 10 .

In the picture:

1. Prefabricated buttresses; 2. Floors; 3. Standing walls; 4. Wet joints; 5. Reserved ribs; 6. Grouting holes; 7. Reserved hook ribs; 10. Strengthening column; 11. Strengthening column combined with ribs.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

As shown in Figure 1, the traditional buttress-type retaining wall construction method is mostly an integral cast-in-place structure; including the bottom plate, vertical wall, and buttress, all are cast on site.

In order to solve the construction process of steel bar binding, formwork installation and reinforcement in the cast-in-situ process of the buttress structure of the buttress retaining wall, it takes a long time to speed up the construction progress and shorten the construction period; at the same time, to avoid the overall stability of the structure caused by the prefabricated assembly process Insufficient performance, etc.; the overall idea of this application is: change the buttress part, bottom plate and vertical wall structure of the buttress retaining wall from integral cast-in-place construction to sequential construction; construct the bottom plate and vertical wall structure of the buttress retaining wall first , and then construct the prefabricated buttress structure, and finally form a whole structure.

Embodiment one.

With reference to Fig. 2-5, a kind of semi-prefabricated buttress type retaining wall rapid construction method comprises the following steps:

S1, factory prefabricated buttress 1;

S2, pouring base plate 2 and vertical wall 3 at the construction site;

S3. Install the prefabricated buttress 1 and pour the wet joint 4 between the prefabricated buttress 1 and the vertical wall 3 .

Wherein, the bottom of the prefabricated buttress 1 is reserved for inserting ribs; correspondingly, the reserved ribs 5 corresponding to the prefabricated buttress 1 are provided on the bottom plate 2 .

Preferably, the length of the reserved ribs 5 is 15d, and the distance is 15-20 cm; wherein, d is the diameter of the reserved ribs 5 .

It can be understood that the distance between the reserved rib insertion hole and the reserved rib 5 at the bottom is consistent, and the depth is not less than 15d.

Further, the side of the prefabricated buttress 1 is provided with a grouting hole 6 communicating with the reserved reinforcement hole; so that the bottom plate 2 of the buttress retaining wall and the prefabricated buttress 1 are reinforced with the reserved reinforcement 5 and grouting Form combined to ensure stability.

Specifically, in step S3, the grouting method is used for construction; cement slurry or other chemical grouting materials are injected through the grouting hole 6, so that the reserved rib 5 is combined with the prefabricated buttress 1, so that the bottom plate 2 and the prefabricated buttress 1 are stable connect.

Further, reserved hook ribs 7 are respectively provided on the joint surfaces of the vertical wall 3 and the prefabricated buttress 1 .

Wherein, the reserved rib 7 is L-shaped.

The cast-in-place vertical wall 3 of the buttress-type retaining wall and the prefabricated buttress 1 are combined in the wet joint form of secondary pouring concrete with the reserved hook 7; the vertical formwork is used to pour the same grade of fine stone between the vertical wall 3 and the prefabricated buttress 1 concrete.

Preferably, the width of the wet joint 4 is 20d, where d is the diameter of the reserved rib 7 .

It can be understood that, preferably, the reserved hook bars 7 and the reserved insert bars 5 are steel bars of the same specification.

Preferably, the length of the horizontal section of the reserved hook rib 7 is 15d, and the length of the vertical section is 5d.

Preferably, the reserved hook ribs 7 are arranged in two rows with a vertical spacing of 15-20 cm.

It can be understood that, as shown in Figure 4; the extension direction of the vertical section of the vertical section of the vertical wall 3 and the reserved hook rib 7 of the prefabricated buttress 1 is opposite; that is, the reserved hook rib 7 of the vertical wall 3 extends downward, and the The hook rib 7 is reserved to extend upward.

In some embodiments, in step S2, the following steps are included.

S201. Floor construction:

For the bottom slab reinforcement of the buttress-type retaining wall, set the reserved reinforcement 5 at the junction with the buttress structure, pour the bottom slab concrete of the buttress-type retaining wall to 200~400mm above the vertical wall structure, and do a good job of maintenance.

Preferably, 300mm of bottom slab concrete is poured.

S202. Standing wall construction:

Install the steel bars of the vertical wall structure, and set the reserved hook bar 7 at the junction with the buttress structure; pour the vertical wall concrete of the buttress-type retaining wall in layers to the top elevation of the vertical wall structure, and do a good job of maintenance.

In some embodiments, in step S3, the following steps are included.

S301, buttress assembly:

Place the prefabricated buttress 1 on the reserved rib 5 according to the positioning of the reserved rib 5 and the reserved rib hole.

S302. Template installation:

Install formwork at the junction of prefabricated buttress 1 and vertical wall 3; ensure that the joints are dense and the flatness meets the requirements of the specification, and the formwork is reinforced.

S303, cast-in-place wet joints:

The fine stone concrete with the same grade as the structure is poured in layers, and the layer height is not more than 0.5 meters; the concrete is vibrated and compacted, poured to the design top elevation, and maintenance and formwork removal are done well.

S304. Grouting reinforcement:

Through the grouting hole 6 reserved on the bottom side of the prefabricated buttress 1, cement slurry or other chemical grouting materials are injected, so that the prefabricated buttress 1 and the bottom plate 2 are combined into a whole.

The purpose of this application is to reduce the construction period of large-scale buttress-type retaining walls, improve construction efficiency and project quality, and solve the problem of mismatch between construction output value and construction efficiency. It can not only improve the construction efficiency, but also ensure the stability of the structure.

Specifically in the following aspects.

(1) Optimizing the construction process:

The bottom plate and vertical wall structure of the buttress-type retaining wall are poured at the construction site, and the buttress structure is prefabricated in the factory; after the construction of the bottom plate and vertical wall of the buttress-type retaining wall is completed, the buttress is connected with it as a whole; horizontal joints Grouting with reserved reinforcement is used for reinforcement, and the construction technology of pouring concrete grade fine stone concrete with reserved reinforcement is used in the vertical direction.

(2) Speed up the construction progress:

Since the buttress-type retaining wall is a thin-walled reinforced concrete structure, and the buttress is a special-shaped structure, it takes a long time in the process of steel bar installation and formwork installation and reinforcement, and the construction efficiency is low, and the construction output value does not match the construction efficiency. The buttress structure is prefabricated in the factory in advance, and after the construction of the buttress-type retaining wall bottom plate and vertical wall is completed, the buttress is connected with it as a whole, which can speed up the construction progress.

(3) Guarantee the construction quality:

The top of the buttress of the buttress-type retaining wall is inclined. During the cast-in-place process, quality defects such as honeycombs, pockmarks, holes, and missing ribs are prone to occur due to insufficient vibration of the top and inability to discharge gas in time. Prefabricating the buttress structure in the factory in advance can avoid the above-mentioned quality defects, which can not only ensure the appearance quality of the concrete, but also meet the strength requirements.

Embodiment two.

With reference to Figure 6-7, the difference from the above-mentioned embodiment is:

A protruding platform 8 is poured on the outside of the reserved rib 5; correspondingly, a notch 9 for fitting the protruding platform 8 is provided at the lower end of the prefabricated buttress 1.

The connection surface between the prefabricated buttress 1 and the bottom plate 2 is increased through the matched raised platform 8 and the notch 9, which can enhance the stability.

Further, the inner end of the notch 9 runs through to the wet joint 4 .

When the wet joint 4 is poured on site, part of the concrete can be filled in the notch 9 to strengthen the connection.

It can be understood that the raised platform 8 and the bottom plate 2 are integrally casted.

Preferably, the bottom plate 2 is configured as a boss structure that shrinks upward.

Embodiment three.

Referring to Figures 8-11, the difference from the above-mentioned embodiment is:

In step S3, pouring of reinforcement columns 10 is also included.

specific:

In step S302, a formwork is installed at the junction of the prefabricated buttress 1 and the vertical wall 3;

In step S303, the reinforcing column 10 is poured integrally with the wet joint.

It can be understood that, in the foregoing embodiments, the formwork is installed to form an inner cavity structure consistent with the thickness of the prefabricated buttress 1; in this embodiment, the inner cavity space of the formwork is increased to form a covered column.

As shown in Figures 8 and 9 ; the reinforcement column 10 is a square column or triangle covering the outside of the wet joint 4 and the prefabricated buttress 1 .

It can be understood that the joint part is a weak force-bearing area, and the vertical wall 3 is fully combined with the prefabricated buttress 1 through the on-site pouring of the reinforced column 10; at the same time, the clad external structure increases the contact area with the vertical wall 3, Provides a larger support surface for better results.

In addition, when the reinforced column 10 in the form of a triangle is selected, only one formwork needs to be provided on each side, which can further speed up the construction speed.

Further, reinforcing column bonding ribs 11 are provided at the end of the prefabricated buttress 1 to fully ensure the combination with the cast-in-place reinforcing column 10 .

It can be understood that, similarly, the reinforcement column joint rib 11 adapted to the reinforcement column 10 can be reserved on the vertical wall 3 .

In the present invention, the semi-prefabricated construction method is adopted, compared with the existing conventional integral cast-in-place method and integral prefabricated assembly method, the following effects can be achieved.

(1) Speed up the progress and shorten the construction period;

The bottom plate and the vertical wall of the buttress retaining wall are conventional standard structures, and the construction is fast, while the buttresses are heterogeneous structures, and the construction efficiency is low; the two are separately constructed, the former is cast-in-situ, and the latter is prefabricated and assembled, which can speed up the construction progress.

(2) Guarantee the quality of the project entity;

Compared with the cast-in-place structure, the concrete appearance quality and strength grade of the prefabricated buttress structure are better.

(3) The overall mechanical performance of the structure is good;

The overall prefabricated and assembled structure has a weak force-bearing part at the joint part, and the semi-prefabricated vertical wall and buttress joint adopts the cast-in-place method, which has better mechanical performance than the bolted joint.

(4) Reduce the amount of formwork and improve the utilization rate of turnover materials.

In the present invention, the combination of standard module construction and special-shaped module construction is adopted, and the cast-in-place structure is matched with prefabricated construction, which can speed up the project progress, reduce labor and material input, and reduce environmental pollution, which has certain promotion and application value.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (10)

1. The quick construction method of the semi-prefabricated wall-supporting retaining wall is characterized by comprising the following steps of:

s1, prefabricating a buttress (1) in a factory;

s2, pouring a bottom plate (2) and a vertical wall (3) on a construction site;

s3, installing the prefabricated buttress (1), and pouring a wet joint (4) between the prefabricated buttress (1) and the vertical wall (3).

2. The rapid construction method of a semi-prefabricated wall-rest retaining wall according to claim 1, characterized in that dowel holes are reserved at the bottom of the prefabricated wall-rest (1);

the base plate (2) is provided with reserved dowel bars (5) corresponding to the prefabricated buttress (1).

3. The rapid construction method of a semi-prefabricated wall-supporting retaining wall according to claim 2, characterized in that the side face of the prefabricated wall-supporting wall (1) is provided with grouting holes (6) communicated with reserved dowel holes;

in step S3, cement slurry is injected through the grouting holes (6).

4. A rapid construction method for a semi-prefabricated wall-supporting retaining wall according to claim 3, characterized in that the joint surfaces of the vertical wall (3) and the prefabricated wall (1) are respectively provided with reserved hooking bars (7).

5. The rapid construction method of a semi-prefabricated wall panel according to claim 4, comprising the steps of, in step S2:

s201, constructing a bottom plate: constructing a bottom plate steel bar, arranging reserved dowel bars (5) at the joint of the bottom plate steel bar and the buttress structure, and pouring bottom plate concrete;

s202, wall standing construction: and (3) installing the reinforcing steel bars of the vertical wall structure, arranging reserved hooking ribs (7) at the joint part of the reinforcing steel bars and the buttress structure, and pouring the vertical wall concrete to the elevation of the top of the vertical wall structure in a layered manner.

6. The rapid construction method of a semi-prefabricated wall panel according to claim 5, comprising the steps of, in step S3:

s301, assembling the buttress: positioning the prefabricated buttress (1) on the reserved dowel bars (5) according to the reserved dowel bars (5) and the reserved dowel bar holes;

s302, template installation: installing a template at the joint of the prefabricated buttress (1) and the vertical wall (3);

s303, wet joint cast-in-situ: fine stone concrete with the same structural grade is poured in layers, the layering height is not more than 0.5 m, the concrete is vibrated and compacted, the concrete is poured to the designed top elevation, and maintenance and demolding work are carried out;

s304, grouting reinforcement: cement slurry is injected through a grouting hole (6) reserved on the side surface of the bottom of the prefabricated buttress (1), so that the prefabricated buttress (1) and the bottom plate (2) are combined into a whole.

7. The rapid construction method of a semi-prefabricated wall-supporting retaining wall according to claim 2, characterized in that the outer side of the reserved dowel bar (5) is poured with a raised platform (8);

the lower end of the prefabricated buttress (1) is provided with a notch (9) which is matched with the raised platform (8).

8. The rapid construction method of a semi-prefabricated wall-rest retaining wall according to claim 6, characterized in that it further comprises, in step S3, pouring reinforcing columns (10);

in step S302, a template is installed at the joint of the prefabricated buttress (1) and the upright wall (3);

in step S303, the reinforcing column (10) is cast integrally with the wet joint.

9. The rapid construction method of a semi-prefabricated wall-rest retaining wall according to claim 8, characterized in that the reinforcing column (10) is a square column or a triangle wrapped outside the wet joint (4), the prefabricated wall-rest (1).

10. A method of rapid construction of a semi-prefabricated wall-rest retaining wall according to claim 8, characterized in that the ends of the prefabricated wall-rest (1) are provided with reinforcing column coupling ribs (11).

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