CN105804292A - Environment-friendly and energy-saving integrated cast-in-situ lightweight concrete wall and construction method thereof - Google Patents

Abstract

The invention discloses a green and energy-saving integrated cast-in-place lightweight concrete wall and a construction method thereof. The structural columns and the structural beams at the top of the wall body are anchored in the wall body, the cable boxes and pipelines are pre-embedded in the wall body, and holes and door and window openings are reserved on the wall body. The invention adopts cast-in-place technology, which is convenient for construction. After the formwork is removed, the wall has high flatness, no plastering, no plastering, and less construction waste; the invention has high strength, can be hung, and can be directly embedded in bolts, solving the problem of foam concrete Due to the problem of uneven settlement and stratification due to excessive lateral pressure during vertical pouring, the wall with a vertical height of 3 to 4 meters can be poured at one time, and the entire construction process is shortened by nearly half compared with the bricklaying construction period, improving construction efficiency. Reduce project management costs, increase investment returns, and enable enterprises to achieve good economic and social benefits.

Description

A green and energy-saving integrated cast-in-place lightweight concrete wall and its construction method

technical field

The invention relates to a lightweight energy-saving wall, in particular to a green and energy-saving integrated cast-in-place lightweight concrete wall, and also relates to a construction method for the wall.

Background technique

Since the beginning of the new century, governments at all levels in our country have listed the innovation of wall materials as one of the important contents of building energy conservation. For the wall of a building, in addition to certain mechanical properties, it is also required to have excellent thermal insulation, heat insulation, sound insulation, waterproof, fire prevention and other properties. When constructing the wall, if the masonry method is used, the labor cost is high and the construction efficiency is low. With the increase in labor costs and the advancement of mechanized construction, on-site masonry is no longer suitable for the needs of current building development; if prefabricated wall panels are used However, the advantages of mechanized construction cannot be reflected in indoor assembly, construction waste is likely to be generated during cutting, and dead angles are likely to occur in tube wells, corners, and under beams.

After nearly a hundred years of slow development, lightweight concrete ushered in a new era of rapid development. Lightweight concrete has excellent properties such as high fluidity, less aggregate consumption, light weight, thermal insulation, fire prevention, sound insulation, earthquake resistance, durability, safety and health, energy saving and environmental protection, and is an energy-saving and environmentally friendly self-insulation enclosure that is currently being developed. Material. The United States, the United Kingdom, the Netherlands, Canada, Japan, South Korea and other countries have fully recognized the good characteristics of lightweight concrete, and have continuously expanded its application fields in construction engineering. The use of lightweight concrete for cast-in-place walls is a major technological breakthrough, which fundamentally solves the problems of building insulation, sound insulation, light weight, environmental protection, safety and industrial production, and is an important direction for building energy conservation.

In recent years, many domestic lightweight concrete companies have begun to develop cast-in-place self-insulating exterior walls, load-bearing or non-load-bearing sound-insulating interior walls, etc., and a development boom has formed, and a large number of application technologies are being intensively researched and developed in various places. At present, there is a kind of cast-in-place lightweight concrete self-insulation composite wall in China. It uses high-quality light steel keel as the frame, uses fiber cement pressure plate as the cladding, and pours in the wall cavity formed by the keel and fiber cement pressure plate. Lightweight concrete, hardened to form a sandwich-type lightweight composite wall. However, due to the light weight and low strength of lightweight concrete itself, the load-bearing force of the composite wall is very limited, so it cannot be used as a load-bearing wall. in addition. Pour lightweight concrete into the wall cavity formed by the keel and the fiber cement pressure plate. The fiber cement pressure plate is used as a formwork. The bonding force between the lightweight concrete and the formwork is not strong, resulting in the separation between the concrete and the formwork to form a gap. , Seriously affect the strength and hanging force of the wall. These defects restrict the further development of cast-in-place lightweight concrete walls.

Contents of the invention

The first object of the present invention is to provide a green and energy-saving integrated cast-in-place lightweight concrete wall that is convenient for construction, can ensure project quality, improve construction efficiency, and reduce construction costs. It has the advantages of multi-functional integration such as good strength, no plastering, strong hanging, pre-buried pipelines, reserved doors and windows, etc. It can organically combine commercial concrete companies, formwork companies, water and electricity installation, civil engineering and decoration companies, etc., to realize cast-in-place The mechanized production and construction of lightweight walls and the integrated production of hydropower and civil engineering have effectively promoted the promotion of green construction and the implementation of building energy conservation.

The second object of the present invention is to provide a construction method of the above-mentioned green and energy-saving integrated cast-in-place lightweight concrete wall.

The first object of the present invention is achieved through the following technical measures: a green and energy-saving integrated cast-in-place lightweight concrete wall, which is characterized in that it includes a wall body and tie bars made of formwork cast-in-place lightweight concrete , the tie bars are arranged on the structural columns at both ends of the wall body and on the structural beams at the top of the wall body, and are anchored in the wall body, and the cable boxes and pipelines are pre-embedded in the wall body, and in the wall body Holes and openings for doors and windows are reserved on the top.

The invention has the advantages of thermal insulation, fire prevention, sound insulation, good flatness, no plastering, strong hanging, pre-buried pipelines, reserved doors and windows and other multi-functional integration advantages; The rear wall has high flatness, no plastering and plastering, and reduces construction waste; the invention has high strength, can be hung, and can be directly embedded with bolts, effectively solving the problem of mold collapse caused by excessive lateral pressure in vertical pouring of foam concrete Due to the problem of uneven subsidence and stratification, walls with a vertical height of 3 to 4 meters can be poured at one time, and the entire construction process is shortened by nearly half of the bricklaying period, which improves construction efficiency, reduces project management costs, and increases investment. The rate of return enables the company to achieve good economic and social benefits.

As an improvement of the present invention, a structural column and a steel mesh sheet of the same height as the wall body are added in the wall body, and the structural columns are distributed along the length direction of the wall body at intervals, and a tie is arranged on the structural column The steel mesh sheet is vertically arranged between the structural column and the structural column and between the adjacent structural columns, and the steel mesh sheet between the structural column and the structural column and the tension bar arranged on the structural column and the structural column Tie reinforcement connection, the reinforcement mesh between the adjacent construction columns is connected with the tie bars arranged on the construction columns.

The wire box pre-embedded in the wall body of the present invention is a switch box, a socket box, a network wire box, a telephone wire box and/or a cable TV box. The pipelines pre-buried in the wall body are electric wires, network cables, telephone lines, water pipes, fire pipes, cable TV network cables, air-conditioning pipelines and/or intelligent equipment pipelines.

The holes reserved on the wall body in the present invention are air-conditioning equipment holes, fire pipe holes, smart device holes, water pipe holes and/or wire and network cable holes; the tops of the door and window openings are provided with lintels.

The structural columns of the present invention are mortar columns, concrete columns or steel columns, and the distance between adjacent structural columns is less than or equal to 4m.

The lightweight concrete of the present invention is foam concrete or lightweight aggregate concrete, the strength is greater than or equal to 4.5 MPa, and the mold will not collapse within 4 meters of vertical height.

The second object of the present invention is achieved by the following technical measures: a construction method of the above-mentioned green and energy-saving integrated cast-in-place lightweight concrete wall, which is characterized in that it includes the following steps:

(1) Determine the position of the wall according to the design requirements and lay out the wires, and set the tie bars on the structural columns and structural beams of the main building;

(2) To support the formwork, the two ends of the formwork are lapped on the structural column, and the top of the formwork is lapped on the structural beam, and the tie bars are extended into the formwork;

(3) Repair the joints between the two ends of the formwork and the structural columns and the joints between the bottom end of the formwork and the ground so that the joints do not leak grout and there is no water in the formwork;

⑷Using ready-mixed mortar to prepare lightweight concrete by foaming at the construction site;

(5) Lightweight concrete is mixed on site and poured into the formwork;

⑹ Carry out natural maintenance on lightweight concrete, and remove the formwork after the specified maintenance time is reached.

As an improvement of the present invention, after step (1) is completed, structural columns are arranged at intervals along the length direction of the wall, tie bars are arranged on the structural columns, and between the structural columns and the adjacent structural columns The steel mesh sheets are vertically arranged between the structural columns and the structural columns, and the steel mesh sheets located between the structural columns and the structural columns are connected with the tie bars arranged on the structural columns and the structural columns, and the steel mesh sheets located between the adjacent structural columns Connect with the tie bars set on the structural column, and turn to step ⑵.

As an improvement of the present invention, holes and door and window openings are reserved on the steel mesh, and after the construction of the steel mesh is completed, wire boxes and pipelines are pre-embedded, and the process is transferred to step (2).

The present invention has the following embodiments: the wire box is a switch box, a socket box, a network cable box, a telephone wire box and/or a cable TV box, and the wire box is attached to the inner surface of the template; the pipeline is an electric wire, a network cable , telephone wires, water pipes, fire pipes, cable TV network cables, air-conditioning pipelines and/or smart device pipelines, and the pipelines are fixed on the steel mesh. The holes are air-conditioning equipment holes, fire pipe holes, intelligent equipment holes, water pipe holes and/or wire and network cable holes, and the holes are pre-buried through plastic pipes, iron pipes or cement pipes; Pre-buried iron parts, iron anchor bars and reinforced steel bars; set lintels on the top of door and window openings.

The formwork support flatness and verticality errors of the present invention are ±2-±5mm.

Compared with prior art, the present invention has following remarkable effect:

(1) The present invention adopts cast-in-place technology, which is convenient for construction. After the formwork is removed, the wall has high flatness, no need for plastering, no plastering, and reduces construction waste. It has heat insulation, fire prevention, sound insulation, good flatness, no plastering, and hanging With the advantages of multifunctional integration such as hanging strength, pre-embedded pipelines, reserved doors and windows, etc., the present invention pre-buries pipelines and wire boxes in advance, and reserves holes and door and window openings to reduce slotting and opening; the present invention has high strength and can be hung Hanging, can be directly embedded in the bolts, which effectively solves the problem of mold collapse caused by excessive lateral pressure of vertical pouring of foam concrete, and uneven stratification due to settlement.

(2) The present invention can realize one-time pouring for walls with a vertical height of 3 to 4 meters, and the entire construction process is shortened by nearly half compared with the bricklaying construction period, which improves construction efficiency, reduces project management costs, and improves investment returns. Good economic and social benefits have been achieved.

(3) The present invention pre-embeds wire boxes, pipelines, reserved holes, doors and windows, and adopts mechanized construction such as mortar pre-mixing, on-site preparation of lightweight concrete, and pumping to ensure construction quality and convenient construction, and realizes cast-in-place lightweight walls Mechanized production and construction and integrated production of hydropower and civil engineering.

(4) The present invention can organically combine commercial concrete companies, formwork companies, hydropower installation, civil engineering and decoration companies, etc., effectively promote the promotion of green construction and implement building energy conservation, and bring good economic and social benefits to enterprises. Many aspects such as green and improving the quality of construction projects have very important economic and social significance.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is one of the structural representations of the green energy-saving integrated cast-in-place lightweight concrete wall of the present invention;

Fig. 2 is the second structural diagram of the green and energy-saving integrated cast-in-place lightweight concrete wall of the present invention;

Fig. 3 is a sectional view along line A-A in Fig. 2 .

detailed description

As shown in Figures 1 to 3, it is a green and energy-saving integrated cast-in-place lightweight concrete wall of the present invention, including a wall body 10 made of formwork cast-in-place lightweight concrete, steel mesh 3, structural columns 2 and tension Tie bars (not shown in the figure), the tie bars are located on the structural columns 1 at both ends of the wall body 10 and on the structural beams at the top of the wall body 10, and the structural columns 2 and steel mesh sheets 3 are located in the wall body 10, Constructive column 2 and reinforced mesh sheet 3 are as high as the wall body, and structural column 2 is distributed along the lengthwise direction of wall body at intervals. In this embodiment, a structural column 2 is provided, and tie bars ( Not shown in the figure), the steel mesh sheet 3 is vertically arranged between the structural column 2 and the structural column 1, and when there are more than two structural columns 2, the steel mesh sheet 3 is also arranged between the adjacent structural columns 2 , wherein, the steel mesh sheet 3 located between the structural column 2 and the structural column 1 is connected with the tie bar arranged on the structural column 1 and the structural column 2, and the steel mesh sheet 3 located between the adjacent structural column 2 is connected with the The tie bar connection set on the construction column 2.

The cable box 8 and the pipeline 9 are pre-embedded in the wall body 10, and the cable box 8 is a switch box, a socket box, a network cable box, a telephone line box and/or a cable TV box. The pipeline 9 is an electric wire, a network cable, a telephone line, a water pipe, a fire pipe, a cable television network cable, an air-conditioning pipeline and/or a smart device pipeline.

Holes and door and window openings are reserved on the wall body, such as square reserved holes 6 and circular reserved holes 7, and the holes are air-conditioning equipment holes, fire pipe holes, smart device holes, water pipe holes and/or wire and network cable holes. The door and window openings are door openings 4 and window openings 5, and the tops of the door and window openings are provided with lintels.

The structural columns 2 are mortar columns, concrete columns or steel columns, and the distance between adjacent structural columns 2 is less than or equal to 4m. The lightweight concrete 10 is foam concrete or lightweight aggregate concrete, the strength is greater than or equal to 4.5MPa, and the mold will not collapse within 4 meters of vertical height.

A construction method for the above-mentioned green and energy-saving integrated cast-in-place lightweight concrete wall, comprising the following steps:

(1) Determine the position of the wall and lay out the wires according to the design requirements, and set the tie bars on the structural column 1 of the main building and the structural beams, that is, the structural beams and structural columns of the main building structure are used as supporting points, and the diameter of the tie bars is different. Less than 6mm, the spacing is not greater than 500mm, and the anchoring length is not less than 200mm;

When the net height of the wall is greater than 3m, reinforced concrete structural columns shall be installed at the joints of lightweight concrete vertical and horizontal walls and at the corners of partition walls, or when the length of lightweight concrete walls is greater than 5m, reinforced concrete structural columns shall be installed The spacing is not greater than 5m, and the concrete strength grade of reinforced concrete structural columns is not lower than C15. When the net height of the wall is less than 3m, concealed columns can be installed at the joints of lightweight concrete vertical and horizontal walls and at the corners of partition walls, and the strength of the concealed columns is the same as that of lightweight concrete.

The structural columns 2 are arranged at intervals along the length direction of the wall body 10, the tie bars are arranged on the structural columns 2, and the steel mesh sheets are vertically arranged between the structural columns 2 and the structural columns 1 and between the adjacent structural columns 2 3. Connect the steel mesh sheet 3 located between the structural column 2 and the structural column 1 with the tie bars arranged on the structural column 1 and the structural column 2, and connect the steel mesh sheet 3 located between the adjacent structural columns 2 It is connected with the tie bars arranged on the construction column 2.

The diameter of the reinforcement on the reinforcement mesh 3 is not less than 10mm, the grid of the reinforcement mesh 3 is arranged in a rectangle, the spacing between the reinforcement of the reinforcement mesh 3 is not more than 300mm, the reinforcement mesh 3 is placed in the middle of the formwork 11, and the reinforcement mesh 3 and The structural columns 2 are tied together by tie bars.

Holes and door and window openings are reserved on the steel mesh sheet 3, and after the construction of the steel mesh sheet 3 is completed, the wire box 8 and the pipeline 9 are pre-embedded. The wire box 8 is a switch box, a socket box, a network cable box, a telephone wire box and/or a cable TV box, and the wire box 8 is attached to the inner surface of the template 11 . The pipeline 9 is an electric wire, a network cable, a telephone line, a water pipe, a fire pipe, a cable TV network cable, an air-conditioning pipeline and/or a smart device pipeline, and the pipeline 9 is fixed on the steel mesh 3 .

The holes are air-conditioning equipment holes, fire pipe holes, smart device holes, water pipe holes and/or wire and network cable holes. The size of the holes is set according to the design requirements, and the holes are pre-buried through plastic pipes, iron pipes or cement pipes. Holes such as rectangular holes 6 and circular holes 7.

The door and window openings are door opening 4 and window opening 5. Reinforcing steel bars are installed in the lightweight concrete walls around the door and window openings, and iron parts are pre-embedded at the installation positions of the doors and windows. , Reinforced lintels should be set up, and the length of the lintels placed on the light concrete wall should not be less than 300mm.

(2) To support the formwork 11, the two ends of the formwork 11 are lapped on the structural column 1, and the top of the formwork 11 is lapped on the structural beam, and the tie bars are extended into the formwork 11. The support flatness and verticality error of formwork 11 is ±2～±5mm; formwork 11 is aluminum formwork, plastic formwork or wood formwork;

(3) Repair the joint between the two ends of the formwork 11 and the structural column 1 and the joint between the bottom end of the formwork 11 and the ground, the joint between the bottom end of the formwork 11 and the ground is repaired with quick-hardening mortar, and the formwork The joint between the two ends of 11 and the structural column 1 is repaired with foam glue, so that the joint does not leak grout, and there is no water in the formwork;

⑷ Use ready-mixed mortar to prepare lightweight concrete by foaming at the construction site, specifically, use the ready-mixed mortar provided by the concrete mixing station or the mortar pre-mixing station, and the 28-day strength shall not be lower than 30MPa. On-site use of automatic foaming equipment to prepare lightweight concrete with adjustable and controllable bulk density;

(5) Lightweight concrete is mixed on site and poured into formwork 11; lightweight concrete with good fluidity, easy pumping, and high strength and crack resistance is poured into formwork 11 through pumping equipment; the pumping equipment is mortar pump and concrete pump or piston pump. The strength of lightweight concrete is not less than 4.5MPa, and the mold will not collapse within a vertical height of 4 meters.

⑹ Carry out natural curing for lightweight concrete, the natural curing is not less than 3 days, and the formwork 11 is removed.

The embodiments of the present invention are not limited thereto. According to the above content of the present invention, according to the common technical knowledge and conventional means in this field, without departing from the above-mentioned basic technical idea of the present invention, the present invention can also make other various forms. Amendment, replacement or alteration all fall within the protection scope of the present invention.

Claims (10)

1. a green energy conservation integration cast-in-place light concrete wall, it is characterized in that: include the wall body and the tension rib that adopt template cast-in-place light concrete to make, described tension rib is provided on the structural column at wall body two ends and is positioned in the structural beams of wall bodies top, and it is anchored in wall body, at this internal line box and pipeline of being embedded with of described wall, and wall body is reserved with hole and door-window opening.

2. green energy conservation integration cast-in-place light concrete wall according to claim 1, it is characterized in that: at described wall, this internal sets up the constructional column contour with wall body and reinforced mesh, described constructional column is spaced apart along the length direction of wall body, constructional column is provided with tension rib, described reinforced mesh is vertically provided between constructional column with structural column and between adjacent constructional column, reinforced mesh between constructional column with structural column is connected with the tension rib being arranged on structural column and constructional column, reinforced mesh between adjacent constructional column is connected with the tension rib being arranged on constructional column.

3. green energy conservation integration cast-in-place light concrete wall according to claim 2, it is characterised in that: it is switch enclosure, socket box, network cable box, telephone wire box and/or cable television box at this internal pre-buried line box of wall；It is electric wire, netting twine, telephone wire, water pipe, extinguishing pipe, cable television netting twine, air conditioning piping and/or smart machine pipeline at this internal pre-buried pipeline of wall.

4. green energy conservation integration cast-in-place light concrete wall according to claim 3, it is characterised in that: hole reserved on wall body is air-conditioning equipment hole, fire protection pipeline hole, smart machine hole, water pipe hole and/or wire mesh string holes hole；The top of described door-window opening is provided with lintel.

5. green energy conservation integration cast-in-place light concrete wall according to claim 4, it is characterised in that: described constructional column is mortar post, concrete column or steel column, being smaller than or equal to 4m of adjacent formation post；Described lightweight concrete is foam concrete or lightweight aggregate concrete, and intensity is more than or equal to 4.5MPa.

6. the construction method of the green energy conservation integration cast-in-place light concrete wall described in a claim 1, it is characterised in that comprise the following steps:

(1) determine position the unwrapping wire of body of wall according to designing requirement, on the structural column of building body and structural beams arranges tension rib；

(2) the two ends of template are overlapped on structural column by support template, and the top of template is then overlapped in structural beams, and make tension rib extend in template；

(3) repair the seam between bottom and the ground of the seam between the two ends of template and structural column and template, make seam not spillage, and without hydrops in template；

(4) use premixing mortar foaming at the construction field (site) to prepare lightweight concrete；

(5) lightweight concrete scene is stirred and is made and be poured in template；

(6) lightweight concrete is carried out natural curing, after reaching the curing time of regulation, form removal.

7. construction method according to claim 6, it is characterized in that: complete step (1) after, length direction interval along body of wall arranges constructional column, constructional column arranges tension rib, and vertically arranged reinforced mesh between constructional column with structural column and between adjacent constructional column, the reinforced mesh that will be located between constructional column with structural column is connected with the tension rib being arranged on structural column and constructional column, the reinforced mesh that will be located between adjacent constructional column is connected with the tension rib being arranged on constructional column, proceeds to step (2).

8. construction method according to claim 7, it is characterised in that: reserving hole and door-window opening on reinforced mesh, after reinforced mesh of having constructed, built-in line box and pipeline, proceed to step (2).

9. construction method according to claim 8, it is characterised in that: described line box is switch enclosure, socket box, network cable box, telephone wire box and/or cable television box, is invested on the inner surface of template by described line box；Described pipeline is electric wire, netting twine, telephone wire, water pipe, extinguishing pipe, cable television netting twine, air conditioning piping and/or smart machine pipeline, is fixed on reinforced mesh by described pipeline；Described hole is air-conditioning equipment hole, fire protection pipeline hole, smart machine hole, water pipe hole and/or wire mesh string holes hole, and hole is by plastic tube, iron pipe or cement pipe pre-embedding；Stiffener is set, in erection of doors and windows position embedded iron parts, ironware dowel and stiffener colligation in door-window opening surrounding；At the top of door-window opening, lintel is set.

10. construction method according to claim 9, it is characterised in that: template support flatness and the error of perpendicularity are ± 2～± 5mm.