CN1651674A - A construction method for wall insulation - Google Patents

Abstract

The present invention discloses a wall body heat-insulating construction method. Said method includes the following main construction steps: firstly, making heat-insulating form and its support, binding steel bar of base wall body, supporting general form at inside of basewall body position, and placing support, then placing heat-insulating form embedded stay bolt at outside of base wall body position, placing wood square at outside of heat-insulating form, placing steel pipe at outside of wood square, concreting, after the concrete is formed, repairing heat-insulating form and making surface treatment, using grooving machine to cut recessed groove on heat-insulating form to make dividing seam, brushing interfacial agent, applying first layer of polymer mortar, laying grid fabric, applying second layer of polymer mortar, finally making surface construction.

Description

A construction method for wall insulation

technical field

The invention relates to wall thermal insulation technology, and relates to a wall thermal insulation construction method.

Background technique

At present, there are many construction methods for building wall insulation: for example, the sandwich insulation wall is a truss made of steel mesh sandwiched in four directions and three-dimensionally intersected in four directions. The steel mesh sheets on both sides are welded into grid panels, and concrete is poured on both sides. Forming a composite shear wall, the disadvantage of this construction is that it changes the wall structure greatly, and the structural performance requires a large number of experiments and demonstrations. The construction technology is quite different from the traditional technology, and it is difficult to popularize; : Unable to achieve one-sided thermal insulation, great changes to the traditional shear wall structure, poor applicability, etc.; the disadvantage of the modular thermal insulation formwork is that it cannot achieve single-sided wall thermal insulation, and the amount of thermal insulation materials is relatively large, occupying indoor space , the structural performance must be tested, and the reinforcement is more difficult than the block-type thermal insulation formwork system, and the applicability is poor; the disadvantage of the improved modular formwork system is: because there are a considerable number of folding hooks in the module, steel mesh is set outside the module , except for a few structural columns and beam reinforcements, it is difficult to configure other stress reinforcements inside the module, so it is difficult to meet the requirements of domestic structural design codes in terms of reinforcement). The shortcoming of the built-in large formwork is that the shaped large steel formwork must be used outside the thermal insulation formwork; the shortcoming of the most commonly used post-insulation method of the thermal insulation formwork is that the thermal insulation construction must be carried out after the main structure is completed, and the construction is greatly affected by the climate. It is difficult to guarantee the construction period, etc.

Contents of the invention

The object of the present invention is to provide a wall thermal insulation construction method, which forms the thermal insulation layer and the structural layer at the same time, and sets anchor bolts at the same time to ensure the bonding of the thermal insulation layer with the base wall, so that the connection is good and the construction period can be shortened , saving construction costs, no need to change the structural system of the wall.

In order to achieve the above object, the present invention is achieved through the following technical solutions: a construction method for thermal insulation of walls, comprising the following construction steps: firstly make thermal insulation formwork and its support, bind the reinforcement of the base wall, and support the inside of the base wall Protect the common formwork and set its support, then set the thermal insulation formwork outside the base wall position, pre-embed anchor bolts on the thermal insulation formwork, set wooden squares outside the thermal insulation formwork, and set steel pipes outside the wooden square, and then pour at the base wall position Concrete, after the concrete is formed, remove the ordinary formwork, wooden squares and steel pipes, repair and surface the insulation formwork, use a slotter to cut grooves on the insulation formwork to make grid joints, and then brush the interface agent on the insulation formwork, After the interface agent dries to meet the requirements, apply the first layer of polymer mortar, lay mesh cloth on the polymer mortar, press the mesh cloth into the polymer mortar layer to make it in close contact, and wait for the polymer mortar to dry until it is not sticky At the same time, apply the second layer of polymer mortar on the outside of the grid cloth, and finally apply the surface layer. The thickness of the second layer of polymer mortar is 1-2.5 mm. The wooden square and the steel pipe are connected by a special screw rod, and after being connected as a whole, they are hoisted in place. A fastener is installed on the screw rod, and the fastener is in a 3-shaped shape. When the concrete is poured, a chute is provided at the discharge port, and the concrete is poured in layers and vibrated in layers, and the layer height is 450-550mm. The thickness of the interface agent applied on the thermal insulation template is 0.7-1 mm.

The advantage of the present invention is that: the thermal insulation layer and the base wall structure layer are formed at the same time, the structural system of the building is not changed on the basis of the traditional wall structure, and no structural force performance appraisal is required, which reduces obstacles for popularization and use. Easy to promote. Cost savings. Compared with the large-scale built-in system, the formwork configuration on the side with the thermal insulation formwork is omitted, which saves the cost of formwork use and labor and machinery costs during construction. Compared with the post-pasting method, it saves a lot of pasting work after the main body construction is completed and the increased use of vertical transportation equipment. There is no special requirement on the number of floors of the building, as long as there are concrete (or other filler) walls, this method can be used in both high-rise and low-rise buildings. The construction period is short. Since the thermal insulation layer is formed at the same time as the structural layer, there is no need to attach thermal insulation formwork after the formation of the structural layer (insulation formwork external attachment system), which shortens the construction period and avoids a large amount of labor and machinery costs in later construction. The connection performance is good. The connection performance comes from two aspects: firstly, the anchor bolt is pre-buried in the wall. After the concrete is poured, the anchor bolt is closely combined with the concrete, and the point connection effect is guaranteed; Connection effects are also guaranteed. There are many options for exterior finishes. Since the anchor bolts are pre-embedded before the concrete is formed, different anchor bolts can be pre-embedded to achieve the function of using facing bricks. The thermal insulation template of the present invention is directly used as a template, which saves construction time and cost, and further ensures the engagement of the thermal insulation template and the wall.

Description of drawings

Accompanying drawing 1 is the body of wall structure figure after construction of the present invention;

Accompanying drawing 2 is formwork construction diagram after concrete pouring of the present invention;

Accompanying drawing 3 is wooden side and steel pipe connection schematic diagram in the construction method of the present invention;

Accompanying drawing 4 is the left view structural diagram of accompanying drawing 3.

In the figure, 1 is the base wall, 2 is the thermal insulation formwork, 3 is the first layer of polymer mortar, 4 is the grid cloth, 5 is the second layer of polymer mortar, 6 is the exterior finish, 7 is the anchor bolt, 8 It is a common template, 9 is a wooden side, 10 is a steel pipe, 11 is a special connecting screw, and 12 is a fastener.

Detailed ways

The present invention comprises the following steps: firstly make the thermal insulation formwork 2 and its support, bind the base wall reinforcement, support the common formwork 8 inside the base wall 1 position, and set its support, and then install the base wall outside the base wall 1 position Set the thermal insulation formwork 2, pre-embed the anchor bolt 7 on the thermal insulation formwork 2, set the wooden square 9 on the outside of the thermal insulation formwork 2, and set the steel pipe 10 on the outside of the wooden cubicle 9, then pour concrete at the position of the base wall 1, and remove the ordinary formwork after the concrete is formed 8. Wooden square 9 and steel pipe 10, repair and surface treatment the thermal insulation formwork 2, use a slotter to cut out grooves on the thermal insulation formwork 2 to make grid seams, then brush the interface agent on the thermal insulation formwork 2, and wait for the interface agent After drying, apply the first layer of polymer mortar 3, lay mesh cloth 4 on the first layer of polymer mortar 3, press the mesh cloth 4 into the first layer of polymer mortar 3 to make it in close contact, and wait until the first layer When the polymer mortar 3 is dry to non-sticky hands, the second layer of polymer mortar 5 is applied outside the grid cloth 4, and the last surface layer is constructed. The thickness of the second layer of polymer mortar 5 is 1-2.5 mm. The wooden square 9 and the steel pipe 10 are connected by a special screw rod 11, and are hoisted in place after being connected as a whole. Fastener 12 is installed on the screw rod 11. The shape of the fastener 12 is a 3-shaped shape, see accompanying drawing 4. When the concrete is poured, a chute is provided at the discharge port, and the concrete is poured in layers and vibrated in layers, and the layer height is 450-550mm. The thickness of the interface agent applied on the thermal insulation template 2 is 0.7-1 mm.

The specific construction steps are as follows:

1. Production of thermal insulation formwork 2 and its support

Before the thermal insulation formwork 2 is set up, the template should be cut, pre-arranged and numbered according to the wall size and the supporting keel. The vertical joints should be on the same straight line as much as possible, and the vertical joints of the thermal insulation formwork 2 should be guaranteed to be supported by keels. The corners of the door and window openings should be cut out with a 90-degree angle from a whole board to make the opening corners. Use large thermal insulation formwork 2 at the openings of doors and windows and on the edge of the wall. Drill anchor bolt holes and pull bolt holes on the cut insulation template 2 according to the figure. The number of anchor bolts 7 is not less than 6 per square meter, and the external corners and the edges of the holes should be densified. The anchor bolt 7 is not less than 60mm from the edge of the base. The length of the anchor bolt 7 entering the concrete layer is not less than 50mm. The wooden square 9 and the steel pipe 10 are connected into a whole according to the specific wall size through the special connecting screw 11, and the described fastener 12 and the special connecting screw 11 can make the connection of the wooden square 9 steel pipe 10 more firm, and then ensure that the insulation layer and the steel pipe 10 are connected together. Occlusion of the base wall. The shape of the fastener 12 is a 3-shaped. The structure of the connecting screw 11 and the fastener 12 is shown in Fig. 3 and Fig. 4; The position of wooden side 9 will match with the assembling situation of heat-insulation formwork 2, guarantees that the edge place of heat-insulation formwork 2 has wooden side 9 supports.

2. Insulation template 2 support

After the inner formwork is supported, install the thermal insulation formwork 2 to the corresponding position from bottom to top according to the pre-arranged numbers. Pull bolts and bolt sleeves should be preliminarily in place on the inner wooden (glued) formwork, and when the heat preservation formwork 2 was in place, the connecting screw rod 11 was pushed into the heat preservation formwork 2 holes. When the thermal insulation formwork 2 is supported, the anchorage 7 can be tied with the wall reinforcement with wires to temporarily fix the thermal insulation formwork 2. After the thermal insulation formwork 2 is supported, it must be inspected and accepted, and the next process can be carried out after passing the test.

3. Concrete pouring

After the ordinary formwork 8 and the thermal insulation formwork 2 are set up and strengthened and accepted, concrete pouring can be carried out. Concrete should be poured and vibrated in layers, and the layer height should be controlled at about 500mm. When pouring concrete, there should be a chute at the discharge port to avoid the direct impact of concrete on the thermal insulation formwork 2. Other concrete construction items are the same as the conventional process. The formwork structure after concrete pouring is shown in Figure 2.

4. Removal of insulation formwork 2, repair of insulation formwork 2 and surface treatment

After the concrete is formed, it is maintained, and the surface support of the thermal insulation formwork 2 and the pull screw can be removed after the maintenance reaches the specified time. If the anchor bolt 7 needs to be added after the surface support of the thermal insulation formwork 2 is removed, the plastic expansion bolt can be drilled and installed. The distance between the added plastic expansion bolts and the edge of the base is not less than 60mm, and the disc is flush with the surface of the thermal insulation template 2 or slightly deeper. Before applying the interface agent, the surface of the thermal insulation formwork 2 must be treated, including cleaning the surface slurry, polishing the uneven parts of the board splicing, repairing holes and damaged parts, etc. The cleaning of the slurry can be done by tapping, rubbing, etc. with a wooden board or woodworking trowel. The uneven splicing of the thermal insulation template 2 must be polished, which can be polished with sandpaper or a hand-held electric grinding wheel. After sanding, the surface must be cleaned of debris with a brush or compressed air.

Hole repair should be handled in this process as much as possible to ensure the construction of the mesh cloth as a whole. If it cannot be treated, it can be treated after the construction of the surface mortar is completed. The depressions and nail holes must be repaired and leveled with polymer mortar, and the next process can be carried out after drying. According to the design requirements, use the ink head to pop up the position of the grid seam on the thermal insulation template 2. After checking, place the positioning guide on the thermal insulation template 2, and use the slotter to cut out the groove. At the position of the grid seam, the mesh cloth should be broken.

5. Brush interface agent

Before applying the interface agent, check whether the thermal insulation template 2 is dry and whether there are impurities on the surface. Use a pen or a roller to brush the interface agent on the thermal insulation template 2, dry it until it sticks to your hands, and then proceed to the next process.

6. Apply the first layer of polymer mortar 3

After brushing the interface agent, the first layer of polymer mortar 3 can be applied only after the interface agent dries to meet the manufacturer's requirements of sticky or non-sticky hands. The ratio and preparation of polymer mortar should meet the requirements of the product specification. Use a trowel to smear a first layer of polymer mortar 2 with an area slightly larger than the grid cloth on the surface of the thermal insulation formwork 2, with a thickness of 1.6-3.5mm.

7. Laying grid cloth 4

During use, the grid cloth 4 will be stretched straight and flattened, and laid horizontally. With the curved side of the grid cloth 4 facing inward, smooth the grid cloth 4 from the middle up and down with a trowel so that it is close to the first layer of polymer mortar 3 . After pressing the grid cloth 4, the first layer of polymer mortar 3 should basically cover the grid cloth 4. The standard grid cloth 4 (ordinary type) should be lapped up, down, left, and right, and the lap length should be no less than 100mm left and right, and no less than 80mm up and down. Reinforced grid cloth 4 needn't overlap, only needs to butt. Mesh cloth 4 paving should be smooth and wrinkle-free, and the fullness of mortar should be 100%. A layer of grid cloth 4 should be added to the inner periphery of the door and window openings and the four corners of the openings. The grid cloth 4 reinforced by the hole is turned over to the wall insulation formwork 2 for 200mm from the inside of the hole, and then the large block grid cloth 4 of the outer layer is laid. The size of the grid cloth at the four corners of the hole is 300mm×200mm, and it is pasted on the reinforced mesh cloth 4 around the hole at an angle of 45 degrees. The mesh cloth 4 in both directions at the corner should be lapped to the other wall. The overlapping length of the first floor’s male and female corners is 200mm, the second floor and above’s male and female corners are 200mm, and the internal corners are 100mm. At the terminal parts such as door and window openings, wall ends, and the junction of the thermal insulation wall and the non-thermal insulation wall, the mesh cloth 4 must be laid on the base wall 1 and overlapped with the base wall 1 with a lap width of 100mm. Mesh cloth 4 should be disconnected at the layered place of the floor and must not be connected.

8. Apply the second layer of polymer mortar 5

The ratio and preparation of the second layer of polymer mortar 5 should meet the requirements of the product specification. After pressing the grid cloth 4 on the first layer of polymer mortar 3, wait for the mortar to solidify and dry until the surface is not sticky, then start to apply the second layer of polymer mortar 5 with a thickness of about 1-2.5mm to cover the grid Cloth 4 shall prevail. The second layer of polymer mortar 5 can be smoothed and can not be collected and calendered. After the construction of the second layer of polymer mortar 5 is completed, it should be cured for at least 24 hours. In cold and humid areas, the curing time should be extended appropriately. The total thickness of the two layers of polymer mortar is 3-5mm. If reinforced grid cloth is used, the total thickness is controlled at 5-6mm.

9. Finishing layer construction

The construction of exterior finish 6 is the same as the construction of exterior finish on the surface of ordinary concrete shear walls.

Claims (6)

1, a kind of wall body heat insulating construction method, it is characterized in that: comprise following construction sequence: at first make heat insulation formwork (2) and supporting thereof, basic unit's body of wall (1) reinforcing bar binding, inboard supporting common templates (8) in basic unit's body of wall (1) position, and its support is set, then at the arranged outside heat insulation formwork (2) of basic unit's body of wall (1) position, go up cast-in fixing bolt (7) at heat insulation formwork (2), heat insulation formwork (2) arranged outside flitch (9), flitch (9) arranged outside steel pipe (10), then at basic unit's body of wall (1) position concreting, behind the concrete formation, remove common templates (8), flitch (9) and steel pipe (10), heat insulation formwork (2) is repaired and surfacing, use notcher on heat insulation formwork (2), to cut out groove to make the lattice seam, go up the brush interfacial agents at heat insulation formwork (2) then, treat to smear first floor polymer mortar (3) after the interfacial agents drying, on polymer mortar, lay grid cloth (4), grid cloth (4) is pressed into polymer mortar layer makes its tight contact, treat that polymer mortar is dried to when tack-free, outside grid cloth (4), smear second layer polymer mortar (5) again, last surface construction.

2, a kind of wall body heat insulating construction method according to claim 1 is characterized in that: second layer polymer mortar (5) thickness is the 1-2.5 millimeter.

3, a kind of wall body heat insulating construction method according to claim 1 is characterized in that: flitch (9) adopts special-purpose connecting screw rod (11) to be connected with steel pipe (10), connects into the lifting of whole back and puts in place.

4, a kind of wall body heat insulating construction method according to claim 3 is characterized in that: connecting screw rod (11) is gone up fastener for installing (12), and fastener (12) is the figure-three shape.

5, a kind of wall body heat insulating construction method according to claim 1 is characterized in that: during concreting, the feed opening place is provided with chute, and concreting in lifts, layering are vibrated, and layer height is 450-550mm.

6, a kind of wall body heat insulating construction method according to claim 1 is characterized in that: go up the brushing interfacial agents at heat insulation formwork (2), its thickness is the 0.7-1 millimeter.