Method for reinforcing thermal insulation layer of outer wall of existing building

A technology for external wall insulation layer and existing buildings, applied in building construction, construction, building maintenance, etc., can solve the problem of limited bonding effect between insulation layer and base layer, separation of insulation layer and base layer, and high construction technology requirements. problems, to increase the effective paste area, ensure the compactness of the glue, and solve the effect of excessive glue injection pressure

Active Publication Date: 2021-12-17
ENGINEERING RESEARCH INSTITUTE OF APPRAISAL AND STRENGTHENING SHANDONG JIANZHU UNIVERSITY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the volume shrinkage of cement mortar has a limited effect on improving the bonding between the insulation layer and the base layer. At the same time, it requires high construction technology. If the pressure is not well controlled, the insulation layer will be separated from the base layer.
High-viscosity and quick-drying micro-foamed polyurethane foam is a kind of material with micro-expansion and very high bond strength, which can overcome the shortcomings of cement mortar volume shrinkage, but it will generate greater pressure during pouring or volume expansion after pouring If the control is not good, the insulation layer that was not firmly bonded will still be stretched, causing the insulation layer to fall off

Method used

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  • Method for reinforcing thermal insulation layer of outer wall of existing building
  • Method for reinforcing thermal insulation layer of outer wall of existing building
  • Method for reinforcing thermal insulation layer of outer wall of existing building

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment discloses a method for strengthening the insulation layer of the exterior wall of an existing building, such as figure 1 shown, including the following steps:

[0035] Step 1: Determine the range to be reinforced of the insulation layer 4 .

[0036] In this embodiment, the bonding condition of each insulation layer is checked one by one by tapping method, and the tapping method is simple and easy to check the bonding condition of the insulation board.

[0037] Infrared thermal imaging technology is used to further check the bonding of the external wall insulation layer, and determine the reinforcement range and the approximate volume of the hollow part.

[0038] Step 2: Determine the distance between glue injection holes 1 according to the degree of effective bonding. The vertical distance between adjacent glue injection holes shall not be greater than 600mm. If the distance between the glue injection holes is too small, the drilling workload will be ...

Embodiment 2

[0055] This embodiment discloses a method for strengthening the insulation layer of the exterior wall of an existing building, such as image 3 shown, including the following steps:

[0056] Step a: Determine the range to be reinforced of the insulation layer.

[0057] The specific method is the same as that of Step 1 in Example 1, and will not be repeated here.

[0058] Step b: Determine the spacing of the glue injection holes according to the degree of effective bonding.

[0059] The specific method is the same as that of step 2 in Example 1, and will not be repeated here.

[0060] Step c: Drill glue injection holes at the thermal insulation area to be reinforced, and drill to the surface of the base wall.

[0061] The specific method is the same as that of step 3 in Example 1, and will not be repeated here.

[0062] Step d: Carry out the first batch of glue injection, the specific method is:

[0063] Glue is injected through multiple rows of glue injection holes arrang...

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Abstract

The invention relates to a method for reinforcing a thermal insulation layer of an outer wall of an existing building. The method comprises the following steps of drilling a plurality of glue injection holes in the thermal insulation layer in a to-be-reinforced range, and arranging the plurality of glue injection holes according to a matrix array; injecting polyurethane polystyrene foam between the heat preservation layer and a base layer wall body in batches through the glue injection holes, in the adjacent columns of glue injection holes, the glue injection holes used for first-comment glue injection are arranged in a staggered mode, in the same column of glue injection holes, the glue injection holes used for the first-comment glue injection are arranged at intervals; after the first-comment glue injection is completed, second-comment glue injection is conducted through the remaining glue injection holes; and during the second-comment glue injection, when the glue injection pressure is increased to exceed a set value, glue injection is stopped, by means of the method, the problem that the heat preservation layer falls off from the outer wall during reinforcement is avoided.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a method for strengthening the thermal insulation layer of the exterior wall of an existing building. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The insulation layer is mostly fixed on the outer wall by a combination of sticking and anchoring. Due to defects such as construction technology, construction quality and material quality, under the action of wind load, part of the external wall insulation layer cracks and falls off due to insufficient effective pasting area, which affects the normal use of the building. In severe cases, it is easy to fall off and hurt people. cause property damage. If effective measures are not taken in time to deal with it, it will pose a threat to the safety of people's lives and property. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G23/02
CPCE04G23/02E04G23/0296
Inventor 韩志国赵考重李安起孔祥菲贾强
Owner ENGINEERING RESEARCH INSTITUTE OF APPRAISAL AND STRENGTHENING SHANDONG JIANZHU UNIVERSITY
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