JPS61257551A - Construction of heat insulating outer wall - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to a construction method for an external heat-insulated outer wall provided with a ventilation layer.

``Conventional technology'' Compared to internal insulation, external wall insulation is a very effective method for improving the indoor environment, reducing heat load, preventing temperature cracks, and preventing dew condensation and frost damage, especially in cold climates. The effect is great on land.

Conventional exterior wall construction with external insulation involves placing insulation material on the outside of the concrete frame, which is constructed on-site, and then pasting metal or concrete panels as exterior finishing material or base material, or by placing insulation materials in a factory in advance. The exterior finishing material, or its base material, and heat insulating material were bonded to each other, and this was poured when concrete was poured into the III body, or it was pasted onto the concrete wall after curing.

``Problems to be solved by the invention'' However, the ridge construction method had the following problems.

i) Increased construction costs due to the complexity of exterior work.

The construction period will be longer.

ii) There are limitations in the selection of exterior finishing materials and construction methods.

iii) External scaffolding is required, and large-scale equipment is required for curing construction during cold weather.

Therefore, the reality is that it is not yet widespread in our country.

``Means for Solving Problems'' and ``Operations'' The present invention was made in view of the above-mentioned circumstances, and its gist is 1. Thin-walled precast for exterior finishing such as tiling reinforced with assembled reinforcing bars. A ventilated metal or plastic net is fixed to the top of the assembled reinforcing bars of the semi-finished plate,
In wet spraying, a heat insulating material is applied to this, or a rigid molded heat insulating material is installed and fixed at the top of the reinforcing bars, and a heat insulating composite panel with a ventilation layer in the middle is formed in a factory, and the heat insulating composite panel is attached to the outer wall. When pouring concrete for the frame as the outer formwork of the frame, anchors are installed in advance on the thin precast concrete slab semi-finished product in order to effectively integrate it, so it is not just an internal work that does not require external scaffolding. The external wall provided with the ventilation layer can be completed by pouring concrete into the frame of the formwork to be obtained, eliminating the complexity of exterior construction work, and easily realizing integral connection to the 11 concrete bodies.

As a result, the secondary effects described below are produced.

In other words, construction of frame work in cold and snowy areas.

In order to prevent concrete from freezing, securing initial strength is an absolute requirement, and for this reason the entire building should be enclosed.

Alternatively, it was necessary to enclose the floor where concrete was poured and take heat, which caused the following problems.

(1) A large amount of cost is required for concrete temperature correction costs, heating costs, roof curing costs, etc.

(2) Because there are large differences in the heating temperature, and because there are large differences in temperature distribution between different parts of the concrete, shrinkage cracks are likely to occur in the concrete.

(3) Due to the cold weather, the efficiency of 9 workers cannot be improved.

etc.

Traditionally, in snowy, cold regions such as Hokkaido and Tohoku.

Most construction work was not carried out during the winter period due to the cost of temporary construction and other additional construction work. The ratio of additional construction costs to construction costs will vary depending on the purpose and scale of the building, but the surrounding area will be covered with sheets, double-layered sheets, plywood, etc. on the external scaffolding.

Heat curing using jet heaters etc. from external scaffolding 2
With measures such as these, it is about 2 to 10%.

Recently, there has been a gradual increase in the construction industry's awareness of the need for year-round construction work, and especially in private construction, with the Sapporo Winter Olympics on the horizon, it is becoming clear that the profits from early completion of buildings will outweigh the additional costs required for construction during the winter. Gradually, people began to understand this and construction began to be carried out during the winter.

Year-round construction work means year-round employment.

2 It is of great significance from the national economic point of view as it utilizes equipment that is idle during the winter, and it is expected that cold construction will become more common practice in the future. The insulation formwork has a great effect, and heating and curing around the building is not required, so temporary construction costs can be significantly reduced, and the 11-frame concrete is less susceptible to initial freeze damage, making it possible to build a high-quality frame. It can be constructed and this insulation composite panel is SL? In C structure, it can be installed 1 to 2 floors ahead of the concrete floor! The construction period for I-body construction can be significantly shortened, and the exterior of the work floor can be completely protected, creating a safe working environment. In addition, especially during construction in cold regions, a comfortable work space can be obtained by blocking cold wind and snow, and work efficiency can be improved.

"Example" This will be explained in detail below based on the drawings.

Figures 1a-c are longitudinal cross-sectional views of an external heat-insulating outer wall provided with a ventilation layer according to the present invention; Figure 3 is an illustration of the actual construction carried out on a building, Figure 3 a''-c is an explanatory diagram of conventional cold weather construction, Figure 1 is an explanatory diagram of cold weather construction using the present invention, and Figure b is an enlarged detailed view of important parts. In Figure 1.

1 in the figure is a thin-walled precast semi-finished product with an exterior finish such as tile driving reinforced with assembly reinforcing bars 1a;
A breathable metal or plastic net 2 is fixed to the top of a.

Further, a wet-sprayed or molded heat insulating material 3 is fixed to the net 2.

Alternatively, a rigid molded heat insulating material may be installed and fixed on the top end of the nine assembled reinforcing bars 1a without using a net for the base.

A ventilation layer 4 will be formed in the gap between the heat insulating material 3 and the semi-finished precast plate 1, but this ventilation layer 4 is continuously installed in the vertical direction of the wall to ventilate the inside of the ventilation layer 4. By providing one ventilation layer in the heat insulating layer, it is possible to prevent dew condensation inside the heat insulating layer and to dissipate moisture due to the difference in water vapor pressure between indoors and outdoors, thereby preventing a decrease in the heat insulating performance of the heat insulating material 3 or deterioration of the heat insulating material 3.

In the case of the embodiment shown in Figures b and c, concrete ribs 1b of the same composition as the assembly reinforcing bars 1a are provided at the vertical joints at both left and right ends of the semi-finished precast concrete plate 1.

By fixing the metal or plastic net 2, it is possible to prevent the concrete from flowing out from the vertical joints and to reinforce the net 2 against lateral pressure.

This is preferable because it serves as a reinforcing rib for the plate itself.

Alternatively, assembly reinforcing bars 1a may be arranged at the vertical joints at both left and right ends (not shown).

Also, 3j! It is also possible to use a spacer (not shown).

5 Although not shown in the drawings, a separator member is pre-installed on the precast plate semi-finished product 1, and as a result, an external scaffold for the formwork is not required.

Reference numeral 5 denotes an anchor for attaching post-cast concrete to the precast concrete plate semi-finished product 1, which penetrates the heat insulating material 3.

The heat insulating composite panel 6 having the above structure and having a ventilation layer in the middle is manufactured at a factory.

A formwork is constructed using the panel 6 as the outer formwork for 11 outer walls, and! G1 body concrete 7 has been placed.

The outer wall is constructed.

In addition, 8 and 9 in Figure C are backup materials at the joints, 1
0 indicates caulking material.

The above ventilation layer was provided. The heat insulating composite panel 6 can be easily produced at a pre-caulking factory, can also be used as an 11-piece concrete formwork, and can be completed quickly, leading to reduced construction costs and shortened construction period.

The exterior finishing material is thin-walled precast concrete plate 1
On the other hand, painting and spraying can be freely selected, such as tiles, tile placement, 9-stone placement, or exposed finish. In addition, thin-walled precast concrete version 1
Since it is manufactured in a factory, it is possible to produce high quality and high precision products.

However,! After pouring and solidifying the I-body concrete 7, the inner formwork is dismantled to complete an externally insulated outer wall with a ventilation layer, but there is no need for external work on the formwork, and regardless of the exterior finishing material, the 11-body concrete There is no need to post-apply it to the concrete, and the advantage is that there is no need for scaffolding or work for that purpose.

Figure 2 shows how to treat the upper and lower ends of the ventilation layer 4.The lower end of the ventilation layer 4 has an opening 4a facing the outside, and the upper end has an opening 4b in the parapet 11.
2, and if a window 13 is interposed in the middle, communication is established by forming a detour around the outside of the circumferential frame of the window 13.

This forms an upward through-flow air passage.

Next, the construction method described below is possible by utilizing the above advantages.

That is, FIG. 3a shows the conventional method of constructing the frame during cold weather construction, in which, as mentioned above, the steel frame work 14 is completed in advance, the external scaffolding 15 is placed, and the upper house curing 16 is installed on the external scaffolding 15. Furthermore, a curing sheet 17 is placed on the ceiling of the concrete pouring floor 19, and a curing sheet 17 is placed on the ceiling of the concrete floor 19. According to the present invention, heat curing is applied from inside and outside the body using a jet heater 18, etc., as follows.

As shown in Figure 3, c, without external scaffolding.

The panel 6 is hung and installed 2 floors in advance of the concrete pouring floor 9.

Panel 6 serves as an insulating formwork.

Naturally, the steel frame work and reinforcement for columns and beams on the floors that will be installed in advance will be completed.

Then, the upper house curing is carried out from the concrete pouring floor 19 or 2nd floor.
Do 0.

The heating 21 may be performed in a narrow closed space created by the horizontal curing 20.

However.

(1) Winter curing costs (concrete temperature correction costs, heating costs, roof curing costs, etc.) in cold and snowy areas can be significantly reduced.

(2) The work environment can be greatly improved.

(3) Small differences in temperature distribution between different parts of the concrete.

Also, because the temperature correction can be reduced.

Less occurrence of shrinkage cracks in concrete.

(4) It becomes easier to ensure the quality of the frame during construction during cold weather.

The following effects will be achieved.

"Effects of the Invention" As described above, according to the present invention, construction in cold weather in snowy and cold regions can be realized, which is extremely meaningful.

[Brief explanation of drawings]

Figures 1a-c are longitudinal cross-sectional views of an external heat-insulating outer wall provided with a ventilation layer according to the present invention; The figures are diagrams of the actual construction of a building, Figures 3a' to 3c are explanatory diagrams of conventional cold weather construction, 2 are explanatory diagrams of cold weather construction using the present invention, and Figure 3b is an enlarged detailed view of important parts. 1...Precast rice product, la...assembly reinforcing bar, lb...concrete rib, 2...net 3
...Insulation material. 4... Ventilation layer + 4a, 4b... Opening, 5... Anchor, 6... Heat insulating composite panel, 7... Structure concrete), 8. 9... Backup material, 10...
・Caulking material, 11...parabet, 12...opening 0.13...window, 14...steel construction, 15...
External scaffolding, 16... Upper house curing, 17... Curing sea), 18... Jet heater, 19... Concrete pouring floor. 20...Horizontal curing, 21...Heating. buψsuggestionlθ ZuichiwonoV

Claims (1)

[Scope of Claims] 1) A ventilated net made of metal or plastic is fixed to the top of the assembled reinforcing bars of a thin-walled precast semi-finished product with an exterior finish such as tile driving reinforced with assembled reinforcing bars,
Wet-sprayed insulation material is applied to this, or rigid molded insulation material is installed and fixed at the top of the reinforcing bars, and a heat-insulating composite panel with a ventilation layer in the middle is formed in a factory, and the heat-insulating composite panel is attached to the outer wall. In order to effectively integrate the frame concrete when pouring it as the outer formwork of the frame, the thin-walled precast concrete slab semi-finished product is provided with a ventilation layer which is characterized by being placed in advance via a planting anchor. External insulation wall construction method. (2) A ventilated metal or plastic net is fixed to the top of the assembled reinforcing bars of a thin-walled precast half-finished product with an exterior finish such as tiling reinforced with assembled reinforcing bars, and a wet-sprayed insulation material is applied to this. A rigid molded heat insulating material is installed and fixed at the top of the water frame or the same reinforcing bars, and a heat insulating composite panel with a ventilation layer in the middle is formed in a factory, and the concrete frame is constructed using the heat insulating composite panel as the outer formwork of the external wall frame. In order to effectively integrate the thin precast concrete slab semi-finished product during pouring, an external insulation wall construction method is used in which a ventilation layer is provided in advance via planting anchors.
An exterior wall construction method characterized in that a predetermined floor is installed prior to the concrete pouring floor, and the roof curing is performed on the floor by horizontal curing connected to the heat insulating composite panel.