CN101672108B - Steel plate-brickwork combination stressed building component and production method thereof - Google Patents

Abstract

The invention relates to a steel plate-masonry composite stress-bearing building component and a production method thereof, which belongs to the technical field of structural engineering. After installing a steel plate with through holes on the wall surface of the existing wall, the wall is removed. The adjacent part of the surface cladding steel plate has an existing wall to form the masonry of the underpinning beam and the support column, and then install the section cladding steel plate on the section of the masonry, and weld and close the section cladding steel plate and the wall cladding steel plate to form The outsourcing steel plate shell can be formed by pressure pouring structural glue between the masonry and the outsourcing steel plate shell. Therefore, the present invention adopts the existing wall as the masonry, and installs steel plates on the two walls of the existing wall for reinforcement, thereby avoiding wet work in the construction process and effectively shortening the construction period; on the other hand, reducing the existing A large number of formwork and scaffolding support required for concrete pouring in the technology saves construction costs; at the same time, it also avoids the large cross-section of components from affecting the beauty and use of buildings.

Description

Steel plate-masonry composite stress-bearing building component and production method thereof

technical field

The invention relates to a steel plate-masonry composite stress-bearing building component and a production method thereof, which is applied to underpinning beams and columns added when the load-bearing wall needs to be removed when the existing masonry load-bearing structure house is undergoing large-scale renovation, It belongs to the technical field of structural engineering.

Background technique

In order to meet the large space requirements of the existing masonry load-bearing structure buildings, part of the load-bearing masonry (mostly brick) walls need to be removed for space expansion, resulting in changes in the original load-bearing transmission route of the walls, which must be set Effective underpinning of beams and columns under stress can ensure the safety and normal use of the structure.

At present, for large-scale transformation projects of masonry load-bearing structures, relatively mature underpinning beams and columns are traditionally used as reinforced concrete structures or composite structures of steel and concrete. Generally speaking, the existing technology is relatively complete and safe and reliable in construction technology. However, due to the existence of concrete construction parts and the inability to fully consider the original wall to participate in the work, it has the following shortcomings: (1) there is a concrete construction part, The normal curing time of concrete needs to be guaranteed. Even if the concrete with admixtures such as early strength is used, it will take a period of time before the formwork can be removed and put into use normally. Therefore, this kind of underpinning beam and support formed by concrete wet operation Column stress components, the maintenance time is longer, prolonging the construction period; (2) Most of the newly added beam and column sections are outsourced to the outside of the residual masonry wall, or are embedded after they meet certain technical requirements. Inside the wall, the newly added beams and columns in the prior art do not consider the residual masonry part to participate in the work. At the same time, in order to meet the construction quality of the concrete, the cross-sectional dimensions of the newly added beams and columns should not be too small, which directly affects the appearance and quality of the building. (3) The pouring and forming of concrete requires a large amount of templates and scaffolding support, which increases construction costs, and simultaneously easily causes congestion at the construction site, safety accidents, and greatly endangers the safety of construction personnel.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a steel plate-masonry composite stress-bearing building component. It uses the existing part of the wall as the inner core, and installs steel plates on the outside of the existing part of the wall for reinforcement, so as to avoid wet work during the construction of the steel plate-masonry composite stress member and effectively shorten the construction period. At the same time, it also reduces the large number of templates and scaffolding support frames required for concrete pouring in the prior art, saving construction costs; in addition, it also avoids the appearance and use of buildings that are affected by the large cross-section of components.

In order to realize above technical purpose, the present invention adopts following technical scheme:

A steel plate-masonry composite stress-bearing building component includes an outer-wrapped steel plate shell and masonry. The masonry is made of existing walls to be transformed into underpinning beams and supporting columns in a large space. The outsourcing steel plate shell is arranged on the periphery of the masonry, and the outsourcing steel plate shell is provided with holes for pouring There are through holes for structural glue, and the outsourcing steel plate shell and masonry are connected as a whole through fasteners and through holes poured with structural glue.

The outsourcing steel plate shell includes the wall surface outsourcing steel plate and the section outsourcing steel plate. There are two outsourcing steel plates on the wall, and the two wall outsourcing steel plates are relatively arranged on the two wall surfaces of the existing wall body constructed into masonry, and the two wall outsourcing steel plates and the masonry placed in between are fixed by fasteners connected, and the cross-section outsourcing steel plate is installed on the section of the masonry, and the cross-section outsourcing steel plate and the wall surface outsourcing steel plate are welded and closed into one. During the construction process, the steel plate should be welded first and then the structural glue should be poured, and the construction sequence should not be reversed.

A cement mortar layer is arranged between the wall-covered steel plate and the masonry, and the cement mortar layer is bonded to the masonry, and grooves for pouring structural glue are arranged on the cement mortar layer. At the same time, the structural adhesive can permeate into the internal masonry through the fastener perforation along the groove.

The fastener is a stud bolt, and the nut and the screw rod of the stud bolt are fixed by welding.

According to the above technical scheme, the following beneficial effects can be achieved:

1. The steel plate-masonry combined stressed building component of the present invention adopts the existing wall body to make the masonry, then on the one hand there is no wet operation of concrete construction, the construction period can be shortened, and on the other hand, it can reduce A large number of formwork and scaffolding support required for concrete pouring saves construction costs, and at the same time avoids the large cross-section of components affecting the appearance and use of the building. The body works together to give full play to the contribution of the residual wall, effectively saving the cost of materials;

2. The wall surface outsourcing steel plate of the present invention and the masonry placed between the wall surface outsourcing steel plates are fixedly connected by fasteners, and the wall surface outsourcing steel plate and the section outsourcing steel plate are closed by welding, then further strengthen the outsourcing steel plate shell and the masonry. The fast connection between the bodies can effectively improve the collaborative work between the two;

3. A cement mortar layer is set between the wall outsourcing steel plate and the masonry. The cement mortar layer is bonded to the masonry, and the cement mortar layer is provided with a groove for pouring structural adhesive, which can facilitate the pouring of structural adhesive , which is conducive to the connection between the outsourcing steel plate shell and the masonry, so as to strengthen the cooperative work of the two;

4. The poured structural adhesive can pass through the groove of the cement mortar layer and penetrate into the internal masonry along the fastener perforation, which can enhance the integrity and strength of the internal masonry.

Another object of the present invention is to provide a production method of a steel plate-masonry composite stress-bearing building component, which involves the existing wall to be reconstructed in a large space to form underpinning beams and support columns, through the existing wall Install the wall surface with through-hole steel plate on the wall surface and install the fasteners, remove the existing wall adjacent to the wall surface steel plate to form the underpinning beam and the masonry in the supporting column respectively, and then Then install the section outsourcing steel plate on the section of the masonry, weld and seal the section outsourcing steel plate and the wall surface outsourcing steel plate to form an outsourcing steel plate shell, and finally pressure pour structural glue between the masonry and the outsourcing steel plate shell to form a steel plate- Masonry composite stressed building components.

The production method of the above-mentioned steel plate-masonry composite stress-bearing building component comprises the following steps: (1) remove the plaster layer on both sides of the existing wall that will be used to construct the underpinning beam and the support column masonry, and then remove the plaster layer on the removed plaster layer. The two surfaces of the existing wall are respectively coated with cement mortar layer, and then before the cement mortar solidifies, grooves for pouring structural glue are set on the surface of the cement mortar layer; Fixedly connected to the outside of the cement mortar layer; (3) Remove the existing wall adjacent to the support column to obtain the support column masonry, and use concrete to repair and smooth the section with incomplete parts. The section is equipped with a section-wrapped steel plate, and at the same time, the existing wall adjacent to the bottom of the underpinning beam is removed to obtain the underpinning beam masonry. The section treatment is the same as that of the supporting column. The outsourcing steel plate and the wall outsourcing steel plate are welded and closed to form an outsourcing steel plate shell; (4) the outsourcing steel plate at the joints of the underpinning beam and the supporting column is fully welded, and reinforcing ribs are installed between the underpinning beam and the supporting column (5) Use pressure equipment to pour structural glue through the through holes set on the outer steel plate shell to fill the gap between the cement mortar layer and the outer steel plate shell, and to fill the gap between the internal masonry through the holes of the fasteners ; (6) Do anti-rust and fire protection layer on the surface of outsourcing steel plate shell.

The fasteners are distributed in a quincunx shape or a rectangle on the outer steel plate of the wall, and the distance between the fasteners in the mid-span compression area of the underpinning beam and the two column ends of the support column is 15t-20t, while the other positions are fastened The spacing between the parts is 30t~60t, t represents the thickness of the steel plate, the compression area in the middle span of the underpinning beam is the compression area in the middle of the underpinning beam, and the length is one-third of the span of the underpinning beam, and the area at the end of the column refers to the The area where the distance between the top of the column and the foot of the column is 400mm to 500mm.

According to the above technical scheme, the following beneficial effects can be achieved:

1. During the construction process, because the steel plate on the wall surface is fastened to the existing wall first to form a whole to participate in the work, and then the existing wall around the steel plate on the wall surface is removed as a whole, so there is no need for support formwork and safety support;

2. Due to the thin thickness of the outsourcing steel plate shell, the cross-sectional size of the underpinning beam and supporting column has little influence on the appearance;

3. Since the outsourcing steel plate shell includes the wall outsourcing steel plate and section outsourcing steel plate welded together, and the outsourcing steel plate shell is installed on the periphery of the masonry, the cross section of the supporting column can be made into a rectangle, T shape or L shape as required , similar to a thin-walled column form.

Description of drawings

Fig. 1 is the structural representation of the steel plate-masonry composite stressed building component of the present invention;

Fig. 2 is A-A view among Fig. 1;

Fig. 3 is B-B view among Fig. 1;

Fig. 4 is the construction flowchart of the steel plate-masonry composite stressed building component of the present invention;

Among them, support column 1 column end area 11 underpinning beam 2 mid-span compression area 21 stud bolt 3 concrete repair layer 4 section outsourcing steel plate 51 wall outsourcing steel plate 52 through hole 53 cement mortar layer 6 masonry 7 reinforced ribs 8 .

Detailed ways

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

As shown in Figures 1 to 3, the steel plate-masonry composite stress-bearing building member according to the present invention includes an outsourcing steel plate shell and a masonry 7, and the masonry 7 is to be transformed into a large space to form an underpinning beam 2 Or the existing wall of the support column 1 is made, the outer steel plate shell is arranged on the periphery of the masonry 7, and the through hole 53 for pouring structural glue is opened on the outer steel plate shell, and the outer steel plate shell and The masonry 7 is connected as a whole through the fasteners and the structural glue poured into the through holes 53 .

The outsourcing steel plate shell includes a wall surface outsourcing steel plate 52 and a section outsourcing steel plate 51, the wall surface outsourcing steel plate 52 is two pieces, and the two wall surface outsourcing steel plates 52 are relatively arranged on the two walls of the existing wall body that forms the masonry 7 , and the two wall-covered steel plates 52 are fixedly connected with the masonry 7 placed therebetween through fasteners, the fasteners are stud bolts 3, and the nuts and screw rods of the stud bolts 3 are fixed by welding , so that the nuts can be effectively prevented from falling off, and the section outsourcing steel plate 51 is installed on the cross section of the masonry 7, and the section outsourcing steel plate 51 and the wall surface outsourcing steel plate 52 are welded and closed into one.

A cement mortar layer 6 is set between the wall surface outsourcing steel plate 52 and the masonry 7, and the cement mortar layer 6 is bonded to the masonry 7, and the cement mortar layer 6 is provided with a groove for pouring structural glue. In addition, A concrete repair layer is arranged between the cross-section outsourcing steel plate 51 and the wall section left by the demolished part of the existing wall, so as to repair the wall section smoothly.

As shown in Fig. 4, the production method of the steel plate-masonry composite stressed building member according to the present invention involves the existing wall body to be transformed into a large space to form the underpinning beam 2 and the supporting column 1, by The wall surface of the body is installed with the wall surface cladding steel plate 52 provided with the through hole 53, and then the fastener is installed, and the existing wall body adjacent to the wall surface cladding steel plate 52 is removed to form the underpinning beam 2 and the supporting column 1 respectively. The inner masonry 7, and then place the section outsourcing steel plate 51 on the cross section of the masonry 7, and weld and close the section outsourcing steel plate 51 and the wall surface outsourcing steel plate 52 to form an outsourcing steel plate shell, and finally install the outsourcing steel plate shell on the masonry 7 and the outsourcing steel plate shell Structural glue is poured under pressure between the bodies to form a steel plate-masonry 7 combined stressed building component.

The production method of the above-mentioned steel plate-masonry 7 combined stressed building components comprises the following steps: (1) according to the cross-sectional dimensions of the underpinning beam 2 and the support column 1, the required wall surface outsourcing steel plate 52, section outsourcing steel plate 51 and double-headed Bolt 3 is ready; (2) remove the plaster layer on both sides of the existing wall that needs to be used to construct the underpinning beam 2 and the masonry 7 of the support column 1, and then apply it on the two surfaces of the existing wall that has been cleaned of the plaster layer Cement mortar layer 6, and before the cement mortar is solidified, a groove for pouring structural glue is arranged on the surface of the cement mortar layer 6, and the groove is an orthogonal oblique groove; (3) the two walls are connected by fasteners The surface outsourcing steel plates 52 are respectively fixedly connected to the outside of the cement mortar layer 6. The present invention adopts pull bolts to tighten and fix the wall surface outsourcing steel plates 52 placed on both sides of the wall, and weld the nuts to prevent loosening. The mid-span compression area of the replacement beam 2 and the column end of the support column 1 are more likely to be damaged due to local buckling instability. The distance between fasteners in the mid-span compression area of beam 2 and the two-column ends of support column 1 is 15t-20t, while the distance between fasteners in other positions is 30t-60t, where t represents the thickness of the steel plate. The compression area is the compression part in the middle of the underpinning beam 2, and the length is one-third of the span of the underpinning beam 2, while the column end area refers to the area 400mm-500mm away from the column top and column foot respectively; (4) Remove the support The part adjacent to the column 1 has a wall body to obtain the masonry 7 of the support column 1, and a section outsourcing steel plate 51 is installed on the section of the support column 1 masonry 7, and the section outsourcing steel plate 51 and the wall surface outsourcing steel plate 52 are welded It is closed to form an outsourcing steel plate shell. In addition, when removing the existing wall adjacent to the supporting column 1, in order to keep the section smooth, the present invention applies a concrete repair layer on the section to facilitate the outsourcing steel plate 51 and masonry 7 of the section. Effective connection between sections, and also save the amount of structural glue; remove the existing wall adjacent to the bottom of the underpinning beam 2 to obtain the masonry 7 of the underpinning beam 2, the section treatment is the same as that of the supporting column 1, and the underpinning The bottom section of the beam 2 masonry 7 is provided with a section outsourcing steel plate 51, and the section outsourcing steel plate 51 and the wall surface outsourcing steel plate 52 are also welded and closed to form an outsourcing steel plate shell; (5) underpinning the beam 2 and the support column 1 The outsourcing steel plates at the joints are fully butt welded, and reinforcing ribs 8 are installed between the underpinning beam 2 and the support column 1; (6) use pressure equipment to pour structural glue through the through holes 53 provided on the outsourcing steel plate shell to fill The gap between the masonry 7 and the outer steel plate shell, and the gap between the inner masonry 7 penetrated and filled along the perforation of the fastener; (7) Anti-rust and fire protection layer is made on the surface of the outer steel plate shell.

Claims (6)

1. steel plate-brickwork combination stressed building component; Comprise encased steel plate housing and masonry; It is characterized in that: said masonry is made with the existing body of wall that formation underpins beam or bearing post with pending large-space rebuilding; Said encased steel plate housing is arranged at the periphery of masonry, and offers the through hole that is used for reperfusion structure glue on the encased steel plate housing, and the structure glue through the through hole perfusion links into an integrated entity between encased steel plate housing and the masonry; The encased steel plate housing comprises metope encased steel plate and section encased steel plate; The metope encased steel plate is two, and this two metopes encased steel plate is relatively arranged on two metopes of the existing body of wall that is built into masonry, and two metope encased steel plates are fixedly connected through securing member with placing masonry therebetween; And the section encased steel plate is installed on the section of masonry, and section encased steel plate and metope encased steel plate welded closure are integral.

2. steel plate-brickwork combination stressed building component according to claim 1; It is characterized in that; Between said metope encased steel plate and the masonry cement sand bed is set, this cement sand bed is bonded on the masonry, and is provided for the groove of reperfusion structure glue on this cement sand bed.

3. steel plate-brickwork combination stressed building component according to claim 1 and 2 is characterized in that, said securing member is a stud, and adopts welding fixing between the nut of this stud and the screw rod.

4. the production method of a steel plate-brickwork combination stressed building component; Relate to pending large-space rebuilding underpins beam and bearing post with formation existing body of wall; It is characterized in that, carry out as follows: A, employing securing member are provided with the metope encased steel plate of through hole at the metope upper mounting plate face of existing body of wall; B, the dismounting existing body of wall adjacent with the metope encased steel plate underpin the masonry in beam and the bearing post to form respectively; C and then settle the section encased steel plate at the section of masonry, and with section encased steel plate and metope encased steel plate welded closure with formation encased steel plate housing; D, between masonry and encased steel plate housing the pressure injection structure glue, promptly form steel plate-brickwork combination stressed building component.

5. the production method of steel plate-brickwork combination stressed building component according to claim 4; It is characterized in that; Before carrying out the A step, carry out earlier following steps successively: carry out the rendering layer removing to being used to construct the existing body of wall two sides that underpins beam and bearing post masonry, then smear cement sand bed respectively on existing body of wall two surfaces of removing rendering layer; Before cement mortar is solidified, be provided for the groove of reperfusion structure glue on the top layer of cement sand bed then; The A step is specially the outside that two metope encased steel plates is fixedly connected on cement sand bed respectively through securing member; The B step is specially removes the existing body of wall adjacent with the metope encased steel plate to obtain bearing post respectively and to underpin the beam masonry; The C step is specially in bearing post and the section that underpins the beam masonry and settles the section encased steel plate, and this section encased steel plate and metope encased steel plate welded closure to be forming the encased steel plate housing, and on the metope encased steel plate, welds to be formed for the through hole of reperfusion structure glue; Between C step and D step, also there are following steps:, and underpining install reinforcing rib plate between beam and the bearing post with the said encased steel plate butt joint full weld that underpins beam, bearing post node place; Described D step realizes in the following manner: adopt the through hole reperfusion structure glue of press device through being provided with on the encased steel plate housing; Filling the gap between masonry and the encased steel plate housing, and the gap of tamping inner masonry of the perforation reperfusion structure glue through securing member; After accomplishing the D step, do antirust, fireproof jointing sheath on the encased steel plate surface.

6. the production method of steel plate-brickwork combination stressed building component according to claim 5; It is characterized in that; Said securing member adopts quincunx or distributed rectangular on the metope encased steel plate, and the securing member spacing in pressurized zone and bearing post two styletables zone is 15t～20t in underpining girder span, and the spacing of all the other position securing members is 30t～60t; T representes steel plate thickness; Underpin in the girder span pressurized zone for underpining pressurized position, beam middle part, length is to underpin 1/3rd of beam span, and the styletable zone then refers to respectively and capital and the suspension column zone of 400mm～500mm apart.

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