CN116480012A - Construction method of high-rise overhanging concrete structure and assembly type structure - Google Patents

Abstract

A construction method and an assembled structure of a high-rise overhanging concrete structure solve the defect that an outer scaffold is needed in the construction of the overhanging concrete structure such as a high-rise building roof balcony and a flower stand, and the method comprises the following steps: the prefabricated belt connecting piece and the steel reinforcement cage expose the concrete cross beam, the longitudinal beam and the top plate, the concrete cross beam and the longitudinal beam are connected into a grid frame, the concrete top plate is installed in the grid frame, and the cast-in-place concrete top plate is reinforced in the layer. The structure comprises: flower stand support column, precast concrete coincide crossbeam, precast concrete coincide longeron, precast building concrete roof and cast in situ concrete roof enhancement layer. The precast concrete coincide crossbeam and precast concrete coincide longeron interconnect constitute net framework structure, and precast concrete roof overlap joint is in net framework structure, and roof steel reinforcement cage, crossbeam steel reinforcement cage and longeron steel reinforcement cage set up in cast in situ concrete roof enhancement layer. The beneficial effects are that: the construction method has the advantages of no need of building an external scaffold, simple construction, short construction period and concrete prefabricated members, and greatly reduces the amount of cast-in-place concrete.

Description

Construction method and assembled structure of a high-rise cantilevered concrete structure

technical field

The invention relates to a building construction method in the construction field, in particular to a construction method and an assembled structure of a high-rise cantilevered concrete structure.

Background technique

Due to the limited use of building space and the aesthetic requirements of the building, general buildings have cantilevered concrete structures such as balconies and roof trellises. For the construction of this cantilevered concrete structure, the existing technology mainly adopts the form of cast-in-place. Cantilevered scaffolding is built around the building structure as formwork support, and then steel bars are tied and concrete is poured.

Contents of the invention

In order to solve the shortcomings of the existing construction technology of the cantilevered concrete structure, such as difficult construction, low efficiency, long construction period, and high construction cost, the invention discloses a construction method and an assembled structure of a high-rise cantilevered concrete structure.

The method that the present invention realizes construction method invention purpose to adopt is:

A construction method of a high-rise cantilevered concrete structure, which is realized by means of a trellis support column reserved on the roof, comprising the following steps:

Step S1. Prefabricate a group of concrete beams, concrete stringers and a group of concrete roofs that constitute the flower stand;

The reinforced skeletons of the set of concrete beams and concrete longitudinal beams expose the design height above the concrete beams and concrete longitudinal beams, and the two ends of the concrete beams and concrete longitudinal beams are respectively pre-embedded with connectors;

The reinforced skeleton of the concrete roof exposes the design height above the concrete roof;

Step S2. Connect a group of concrete beams and concrete longitudinal beams to form a grid frame structure through the pre-embedded connectors at both ends, connect the connection nodes of the grid frame structure formed by connecting the concrete beams and concrete longitudinal beams to the reserved flower trellis roof support columns with bolts, and set diagonal support rods between the flower trellis roof support columns and the connection nodes of the grid frame structure;

Step S3. Splicing and installing the concrete roof and the grid frame structure formed by connecting the concrete beams and concrete longitudinal beams, the exposed part of the steel skeleton of the concrete roof and the exposed part of the concrete beam skeleton are connected to each other as a whole;

Step S4. supporting the exposed part of the reinforced skeleton of the concrete roof, concrete beams and concrete longitudinal beams and pouring concrete at one time to form the top of the concrete roof, concrete beams and concrete longitudinal beams, forming an integral post-cast concrete roof reinforcement layer;

Step S5. After the post-cast concrete roof reinforcement layer is cured, the formwork and the diagonal support rods are removed.

The technical scheme that the present invention realizes the invention object of flower stand structure adopts is:

A high-rise cantilevered concrete assembly structure, the structure includes: a group of flower trellis support columns, a group of prefabricated concrete composite beams, a group of prefabricated concrete composite longitudinal beams, a group of prefabricated concrete roof and cast-in-situ concrete roof reinforcement layer.

The two ends of the prefabricated concrete composite beams are respectively provided with I-beam embedded parts, and the two ends of the group of precast concrete composite longitudinal beams are respectively provided with connecting vertical plate embedded parts.

The beam reinforcement cage of the precast concrete composite beam is exposed on the precast concrete composite beam, and the longitudinal beam reinforcement cage of the precast concrete composite beam is exposed on the precast concrete composite beam.

The roof reinforcement cage of the prefabricated concrete roof is exposed above the precast concrete roof;

The I-beam embedded parts of a group of prefabricated concrete composite beams and the connecting vertical plate embedded parts of a group of prefabricated concrete composite longitudinal beams are connected to each other to form a grid frame structure;

The connecting nodes of the grid frame structure formed by a group of prefabricated concrete composite beams and a group of prefabricated concrete composite longitudinal beams are fixedly connected with the support columns of the flower stand.

The set of precast concrete roofs are overlapped respectively in a grid frame structure formed by a set of precast concrete laminated beams and a group of precast concrete laminated longitudinal beams, and the roof reinforcement cages on the precast concrete roof are respectively connected with the beam reinforcement cages of the precast concrete laminated beams and the longitudinal beam reinforcement cages of the precast concrete laminated longitudinal beams.

The roof reinforcement cage, beam reinforcement cage and longitudinal beam reinforcement cage are arranged in the cast-in-place concrete roof reinforcement layer.

The beneficial effects of the invention are: no need to build scaffolding, simple construction, high construction efficiency, short construction period, a large number of prefabricated concrete parts are used, and the amount of concrete poured on site is greatly reduced.

The present invention will be described in detail below in conjunction with the accompanying drawings.

Description of drawings

Accompanying drawing 1 is the exploded schematic view of the high-rise cantilevered concrete prefabricated structure of the present invention.

Accompanying drawing 2 is the partially enlarged schematic diagram of A in accompanying drawing 1.

Accompanying drawing 3 is the partially enlarged schematic diagram of B in accompanying drawing 1.

Accompanying drawing 4 is the schematic diagram of the connection structure between the precast concrete laminated beam and the precast concrete laminated beam of the present invention.

Accompanying drawing 5 is the schematic diagram of the structure of the precast concrete laminated stringer of the present invention.

Accompanying drawing 6 is the schematic diagram of the prefabricated concrete roof structure of the present invention.

Accompanying drawing 7 is the structure schematic diagram of horizontal adjustment leg of the present invention.

In the accompanying drawings, 1. flower trellis support column, 2. prefabricated concrete laminated beam, 2-1. I-beam embedded parts, 2-2. beam reinforcement cage, 3. precast concrete composite longitudinal beam, 3-1. connecting vertical plate embedded parts, 3-2. longitudinal beam reinforcement cage, 4. precast concrete roof, 4-1.

Detailed ways

The invention relates to a construction method of a high-rise cantilevered concrete structure, which is realized by means of a trellis support column reserved on the roof.

The method includes the following steps:

Step S1. Prefabricate a group of concrete beams, concrete stringers and a group of concrete roofs that constitute the flower stand;

The reinforced skeletons of the set of concrete beams and concrete longitudinal beams expose the design height above the concrete beams and concrete longitudinal beams, and the two ends of the concrete beams and concrete longitudinal beams are respectively pre-embedded with connectors;

The steel bar skeleton of the concrete top slab exposes the design height above the concrete top slab.

The exposed design height above the concrete beam.

According to the design requirements of the final poured concrete roof reinforcement layer, the exposed height of the reinforced skeleton of the concrete beams and concrete longitudinal beams shall be reserved.

Step S2. A group of concrete beams and concrete longitudinal beams are connected to form a grid frame structure through pre-embedded connectors at both ends, and the connection nodes of the grid frame structure formed by connecting the concrete beams and concrete longitudinal beams are fixedly connected with the reserved flower trellis roof support columns with bolts, and diagonal support rods are set between the flower trellis roof support columns and the connection nodes of the grid frame structure.

The inclined support rods ensure the stability of a group of concrete beams and concrete longitudinal beams connected to each other to form a grid frame structure before pouring the concrete roof reinforcement layer.

Step S3. Splicing and installing the concrete roof and the grid frame structure formed by interconnecting concrete beams and concrete longitudinal beams, the exposed part of the steel skeleton of the concrete roof and the exposed part of the concrete beam skeleton are connected to each other as a whole.

Step S4. Formwork is cast on the exposed part of the steel skeleton of the concrete roof, concrete beams and concrete longitudinal beams, and concrete is poured at one time to form the top of the concrete roof, concrete beams and concrete longitudinal beams, forming an integral post-cast concrete roof reinforcement layer.

The reinforced layer of the post-cast concrete roof serves as the topmost structure of the pergola structure. That is to ensure the integrated strength of the connection between the concrete roof and the concrete beam steel and the stability of the connection between them.

Step S5. After the post-cast concrete roof reinforcement layer is cured, the formwork and the diagonal support rods are removed.

In the embodiment of the present invention, the pre-embedded connectors at both ends of the concrete beam are I-beams, and the pre-embedded connectors at both ends of the concrete longitudinal beam are connecting vertical plates. The connection plate bolts welded in the I-beam are connected between the connecting vertical plate and the I-beam.

A high-rise cantilevered concrete assembly structure, the structure includes: a set of trellis support columns 1, a set of precast concrete laminated beams 2, a set of precast concrete laminated longitudinal beams 3, a set of precast concrete roofs 4 and a reinforced layer 5 of cast-in-place concrete roofs.

The two ends of the precast concrete composite beam 2 are respectively provided with I-beam embedded parts 2-1, and the two ends of the precast concrete composite longitudinal beam 3 are respectively provided with connecting riser embedded parts 3-1.

The I-beam embedded part 2-1 and the connecting vertical plate embedded part 3-1 are respectively used before realizing the precast concrete laminated beam 2 or connecting the precast concrete laminated beam 2 and the precast concrete laminated longitudinal beam 3.

The beam reinforcement cage 2-2 of the precast concrete composite beam 2 is exposed above the precast concrete composite beam 2, and the longitudinal beam reinforcement cage 3-2 of the precast concrete composite beam 3 is exposed above the precast concrete composite beam 3.

The roof reinforcement cage 4-1 of the precast concrete roof 4 is exposed above the precast concrete roof 4 .

The exposed parts of the beam reinforcement cage 2-2, the longitudinal beam reinforcement cage 3-2 and the plate reinforcement cage 4-1 are used as the reinforcement cage of the cast-in-place concrete roof reinforcement layer 5.

The I-beam embedded parts 2-1 of a group of precast concrete laminated beams 2 and the connecting vertical plate embedded parts 3-1 of a group of precast concrete laminated longitudinal beams 3 are connected to each other to form a grid frame structure.

The connection nodes of the grid frame structure formed by a group of precast concrete composite beams 2 and a group of precast concrete composite longitudinal beams 3 are fixedly connected with the flower stand support columns 1 .

A group of precast concrete roofs 4 are overlapped respectively in a grid frame structure formed by a group of precast concrete laminated beams 2 and a group of precast concrete laminated longitudinal beams 3, and the roof reinforcement cage 4-1 on the precast concrete roof 4 is connected with the beam reinforcement cage 2-2 of the precast concrete laminated beam 2 and the longitudinal beam reinforcement cage 3-2 of the precast concrete laminated beam 3 respectively.

The beam reinforcement cage 2-2, the longitudinal beam reinforcement cage 3-2 and the plate reinforcement cage 4-1 are connected into one body to ensure the strength of the cast-in-place concrete roof reinforcement layer 5 .

The roof reinforcement cage 4-1, beam reinforcement cage 2-2 and longitudinal beam reinforcement cage 3-2 are arranged in the cast-in-place concrete roof reinforcement layer 5 .

Concrete is directly poured on the roof reinforcement cage 4-1, beam reinforcement cage 2-2 and longitudinal beam reinforcement cage 3-2 to form a cast-in-place concrete roof reinforcement layer 5 .

In the embodiment of the present invention, a horizontal adjustment leg 6 is provided between the connection nodes of the grid frame structure formed by a group of precast concrete laminated beams 2 and a group of precast concrete laminated longitudinal beams 3 and the flower stand support column 1.

The level adjustment is realized by changing the height of the level adjustment legs 6 .

Claims (4)

1. The construction method of the high-rise overhanging concrete structure is realized by means of flower stand support columns reserved on the roof, and is characterized in that: the method comprises the following steps:

s1, prefabricating a group of concrete cross beams, concrete longitudinal beams and a group of concrete top plates which form a flower stand;

the steel reinforcement frameworks of the concrete cross beams and the concrete longitudinal beams are exposed out of the designed height above the concrete cross beams and the concrete longitudinal beams, and connecting pieces are respectively embedded at the two ends of the concrete cross beams and the concrete longitudinal beams;

the steel reinforcement framework of the concrete top plate exposes out of the design height on the concrete top plate;

s2, a group of concrete cross beams and concrete longitudinal beams are connected with each other through connecting pieces pre-buried at two ends to form a grid frame body structure, connecting nodes of the grid frame body structure formed by the mutual connection of the concrete cross beams and the concrete longitudinal beams are fixedly connected with reserved flower frame top plate supporting columns through bolts, and inclined supporting rods are arranged between the connecting nodes of the flower frame top plate supporting columns and the grid frame body structure;

s3, splicing and installing a concrete top plate and a grid frame body structure formed by connecting concrete cross beams and concrete longitudinal beams with each other, wherein exposed parts of a steel reinforcement framework of the concrete top plate and exposed parts of a concrete beam framework are connected with each other to form a whole;

s4, supporting the exposed parts of the steel reinforcement frameworks of the concrete top plate, the concrete cross beams and the concrete longitudinal beams and casting concrete at one time to form the upper surfaces of the concrete top plate, the concrete cross beams and the concrete longitudinal beams, so as to form an integral post-cast concrete top plate reinforcing layer;

and S5, dismantling the template and the inclined support rods after finishing maintenance of the post-cast concrete roof reinforcing layer.

2. The construction method of the high-rise overhanging concrete structure according to claim 1, characterized in that: the connecting pieces pre-buried at the two ends of the concrete beam are I-steel, and the connecting pieces pre-buried at the two ends of the concrete longitudinal beam are connecting vertical plates.

3. The utility model provides a high-rise concrete assembled structure that encorbelments which characterized in that: the structure comprises: a group of flower stand support columns (1), a group of precast concrete superposed cross beams (2), a group of precast concrete superposed longitudinal beams (3), a group of precast concrete top plates (4) and a cast-in-place concrete top plate reinforcing layer (5);

i-steel embedded parts (2-1) are respectively arranged at two ends of the precast concrete superposed beam (2), and connecting vertical plate embedded parts (3-1) are respectively arranged at two ends of the precast concrete superposed longitudinal beam (3);

the beam reinforcement cage (2-2) of the precast concrete superposed beam (2) is exposed on the precast concrete superposed beam (2), and the beam reinforcement cage (3-2) of the precast concrete superposed beam (3) is exposed on the precast concrete superposed beam (3);

the top plate reinforcement cage (4-1) of the precast concrete top plate (4) is exposed on the precast concrete top plate (4);

the I-steel embedded parts (2-1) of the group of precast concrete superposed beams (2) and the connecting vertical plate embedded parts (3-1) of the group of precast concrete superposed longitudinal beams (3) are connected with each other to form a grid frame structure;

the connecting nodes of the grid frame body structure formed by the group of precast concrete superposed cross beams (2) and the group of precast concrete superposed longitudinal beams (3) are fixedly connected with the flower stand support columns (1);

the group of precast concrete top plates (4) are respectively lapped and lapped in a grid frame body structure formed by the group of precast concrete superposed beams (2) and the group of precast concrete superposed longitudinal beams (3), and a top plate reinforcement cage (4-1) on the precast concrete top plates (4) is respectively connected with a beam reinforcement cage (2-2) of the precast concrete superposed beams (2) and a longitudinal beam reinforcement cage (3-2) of the precast concrete superposed longitudinal beams (3) into a whole;

the top plate reinforcement cage (4-1), the cross beam reinforcement cage (2-2) and the longitudinal beam reinforcement cage (3-2) are arranged in the cast-in-place concrete top plate reinforcement layer (5).

4. A high-rise overhanging concrete fabricated structure according to claim 3, characterized in that: a group of precast concrete coincide crossbeams (2) and a group of precast concrete coincide grid framework structure's that longeron (3) constitute connect node and pergola support column (1) between still be provided with horizontal adjustment landing leg (6), horizontal adjustment landing leg (6) upper end and I-steel built-in fitting (2-1) bolted connection, pre-buried welding or bolted connection on horizontal adjustment landing leg (6) lower extreme and pergola support column (1).