CN112227688A - Stiffening plate bearing type outer frame-free construction platform for residential building and construction method - Google Patents

Abstract

The invention discloses a stiffening plate-supported construction platform without an outer frame and a method thereof for residential buildings, belonging to the technical field of structural engineering. The structure consists of a stressed tripod, a protection system, a connecting piece, a reinforcing piece and bolts. Compared with the prior art, the construction protection platform without an outer frame proposed by the present invention has reasonable structure, clear force transmission path, high bearing capacity, high assembly rate, environmental protection and low economic cost. The use of steel pipe connectors as the connection method between the protection system and the stress system improves the construction efficiency; the reinforcement at the stress bolts ensures that the stress state of the frame does not change and ensures the stability of the structure; the lower support is separated from the stress system, It is easy to install and provides bearing capacity reserve. It is a new type of prefabricated construction protection platform without external frame suitable for low-rise residential buildings.

Description

Stiffening plate bearing type outer frame-free construction platform for residential building and construction method

Technical Field

The invention relates to a stiffened plate bearing type construction platform without an external frame for a residential building and a manufacturing method thereof, belonging to the technical field of structural engineering.

Background

The building construction protection platform is a frame body which is erected at a certain height, is attached to a building structure and has the functions of bearing, preventing toppling and preventing falling. With the continuous development of social economy, the height of the building is increased, and meanwhile, the country strongly pushes the assembly type building, and the improvement of the process to match the assembly type construction is also needed. The traditional construction protection platform is limited by scaffold construction, is not suitable for multi-story and high-rise buildings and is difficult to follow the construction rhythm of the fabricated building, so that the fabricated frameless construction protection system is provided by the invention.

The construction of building construction protection platform has following several forms, forms such as traditional console mode outer scaffold frame, gate-type scaffold frame, overhanging type scaffold frame and inserted lift scaffold frame. Traditional console mode scaffold frame is applied to the multi-storey building construction more, and overhanging type scaffold frame is used for many high-rise constructions more, and inserted lift scaffold frame constantly promotes along with the construction process because of it can be through self hoisting system, is used for among the construction of high-rise, super high-rise more.

Under the existing construction conditions, the building construction protection platform has some problems. For example: although the traditional floor type scaffold is flexible to disassemble and convenient to transport, the reliability is lower, the assembly rate is lower, and in addition, the building height has strict requirements and is not suitable for the building construction at the present stage any more. A large amount of high-altitude assembling and disassembling work is required to be carried out on the cantilever type scaffold in the using process, and the cantilever type scaffold is low in construction efficiency, high in danger and large in workload. The cost of using of attached lifting scaffold is too high, and small many high-rise residential projects can't bear, operates attached lifting scaffold simultaneously and has higher requirement to managers' quality otherwise very easy accident.

Aiming at the problems of the existing building construction protection platform system, the assembled external frame-free construction protection platform for the multi-story and high-rise shear wall system provided by the invention has the following advantages: (1) simple structure and definite force transmission path. (2) High bearing capacity and high safety performance. (3) The use is extensive, practices thrift the space. (4) The assembly degree is high, and the transportation is convenient. (5) Green, sustainable, economical and practical.

Disclosure of Invention

The invention aims to provide a stiffening plate support type no-external-frame construction platform for a residential building and a construction method thereof, and aims to solve the problems that an existing building construction protection platform is complex in installation, low in safety reserve, not beneficial to assembly type construction, not beneficial to green development and the like.

A stiffened plate bearing type external frame-free construction platform for residential buildings is divided into a stressed structure, a surrounding structure and a node connection structure; the force-bearing structure is divided into a main force-bearing component and a reinforcing component (5).

The main body stress member in the stress structure is a plurality of stress triangular trusses (1), and the bottom of each stress triangular truss (1) is provided with a reinforcing member (5). The reinforcing member (5) is formed by welding a bent clamping plate (6), a supporting plate (7), a rectangular rib plate (8) and a backing plate (9), the bottom of the stressed triangular truss (1) is inserted by the bent clamping plate (6), the bent clamping plate (6) is fixed on the supporting plate (7) through the rectangular rib plate (8), the backing plate (9) is welded at the lower part of the bent clamping plate (6), a threaded hole for fixing an opposite-penetrating bolt (17) is formed in the backing plate (9), and the stressed triangular truss (1) is connected to a shear wall through the fixed opposite-penetrating bolt (17); all the stressed triangular trusses (1) are arranged on the same plane, and the enclosure structure is fixed on the stressed triangular trusses (1) through the node connection structure. The envelope structure comprises a scaffold inner vertical rod (11), a scaffold outer vertical rod (12), a scaffold cross rod (13) and a scaffold longitudinal rod (14). The scaffold inner vertical rod (11) and the scaffold outer vertical rod (12) are vertically installed on the triangular truss body (3), the scaffold cross rod (13) is installed between the scaffold inner vertical rod (11) and the scaffold outer vertical rod (12), the scaffold vertical rod (14) is installed between the adjacent scaffold vertical rods, and the scaffold inner vertical rod (11), the scaffold outer vertical rod (12), the scaffold cross rod (13) and the scaffold vertical rod (14) are all connected through the scaffold fastening piece in a fastening mode. The node connecting structure is composed of steel pipe connecting nodes (15), and the steel pipe connecting nodes (15) are fastened with the scaffold inner vertical rod (11) and the scaffold outer vertical rod (12) through bolts.

The stressed triangular truss (1) is formed by sequentially welding an upper truss chord member (2), a diagonal web member (3) and a vertical web member (4) of the truss to form a triangular structure; the truss upper chord member (2), the truss diagonal web members (3) and the truss vertical web members (4) are all hot-rolled seamless square steel tubes, and the scaffold tube connecting pieces (15) are welded on the top surface of the truss upper chord member (2). The upper part of the truss vertical web member (4) is fixed on the shear wall body through a stressed bolt (18).

An angle steel frame is welded on the stress triangular truss body (1), supporting steel bars are arranged in the angle steel frame, and steel meshes are fully paved to support a template to form a working space.

A through hole is reserved in the center of the bending splint (6) and the base plate (9) for the penetration of the fixing bolt (17). The supporting plate (7) provides partial vertical support for the stressed triangular truss (1); the bending included angle of the upper part of the bending splint (6) is 30 degrees.

The scaffold inner vertical rod (11), the scaffold outer vertical rod (12), the scaffold cross rod (13), the scaffold longitudinal rod (14), the scaffold pipe connecting piece (15) and the steel pipe reinforcing piece (16) are all hot-rolled seamless circular steel pipes.

The fixing bolt (17) and the stressed bolt (18) are high-strength bolts.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention relates to a stiffened plate bearing type construction platform without an external frame for residential buildings and a manufacturing method thereof, wherein the specific manufacturing method comprises the following steps:

the first step is as follows: a stressed triangular truss (1) is welded in a factory workshop, and an upper truss chord member (2), a truss diagonal web member (3) and a truss vertical web member (4) are welded in sequence according to drawing requirements. And drilling the truss vertical web members (4) and welding steel pipe reinforcements (16).

The second step is that: welding a supporting system (5) in a factory workshop, drilling a bent clamping plate (6) and a backing plate (9), welding, and then welding with a supporting plate (7) and a rectangular rib plate (8) according to the drawing requirements.

The third step: processing scaffold pipe connecting pieces (15) in a factory workshop and welding the scaffold pipe connecting pieces to corresponding positions of the truss upper chord (2); preparing the inner vertical rod (11) of the scaffold, the outer vertical rod (12) of the scaffold, the cross rod (13) of the scaffold, the longitudinal rod (14) of the scaffold and corresponding fasteners required by the protection system (10).

The fourth step: and (3) installing a support system (5) and a stressed triangular truss (1) on site. The supporting system (5) is placed at a designated position, then the fixing penetrating bolt (17) penetrates through the bending clamping plate (6), the supporting system (5) and the reserved hole of the wall body in sequence, and the bolt is screwed up to complete installation. The lower end of a truss vertical web member (3) of the stressed triangular truss (1) is sleeved into a bent clamping plate (6) of a supporting system (5), then the position is adjusted, stressed split bolts (18) sequentially penetrate through the truss vertical web member (3) and reserved holes of a wall body, and the bolts are tightened to complete installation.

The fifth step: a protective system (10) is installed in the field. And sequentially inserting the inner upright rod (11) and the outer upright rod (12) of the scaffold into the corresponding scaffold pipe connecting pieces (15), and screwing bolts on the scaffold pipe connecting pieces (15) to finish fixing. The scaffold cross bar (13) is fixed with the scaffold inner upright post (11) and the scaffold outer upright post (12) through fasteners to finish one-frame installation. And determining the distance between the stressed triangular truss (1) and the auxiliary components thereof according to the standard requirements and the actual conditions of a construction site, and connecting each stressed triangular truss (1) and the auxiliary components thereof through the longitudinal rods (14) of the scaffold to finish the integral installation of the structure.

And a sixth step: laying steel mesh sheets and erecting steel plate meshes. Angle steel is welded on the upper chord (2) of the truss to form a frame body, and steel bars are arranged in the frame and used for supporting the template. And laying the steel mesh into the angle steel welding frame to form a working space. The steel plate net is hung on the vertical rod (14) of the scaffold to form horizontal protection.

Compared with the prior art, the invention relates to a stiffened plate supporting type construction platform without an external frame for residential buildings and a manufacturing method thereof, and the platform has the following advantages:

(1) the structure is simple, the force transmission path is clear, and the bearing capacity is high. The main stressed components of the invention are a stressed triangular truss and stressed split bolts, wherein the stressed triangular truss directly bears load and transmits the load to the stressed split bolts. Compared with the similar invention, the invention adopts the square steel pipe as the main material, and the cross section area and the radius of gyration are both larger, thereby providing higher bearing performance and stability for the structure.

(2) The installation is convenient, and the security performance is good. The invention adopts a separated design, and all parts are connected through bolts, thereby ensuring the safety and greatly keeping the installation flexibility. Compared with the existing design that the connecting nodes are all placed on the vertical rods, the connecting structure separates the stressed connection from the fixed connection, can be adjusted greatly in the installation process, and avoids the installation problem caused by the error of the reserved holes.

(3) The use is extensive, practices thrift the space. The assembled building external protection system for the shear wall system adopts the design that the stress truss is separated from the lower support system, so that the safety and the efficiency of high-altitude installation are ensured. The invention can therefore be applied not only to fabricated building structures but also to cast-in-place structures. Meanwhile, due to the fact that the assembly is simple and convenient, streamlined construction can be achieved through parts of two or three layers of the entering field, and the problems of small area of a stock yard and insufficient stacking area are greatly relieved.

(4) The assembly degree is high, and the transportation is convenient. The invention is divided into three parts, the connection form between each part is simple and efficient, and the disassembly and assembly are very convenient. All parts are prefabricated in factory workshops, the size of the components is strictly guaranteed, the component form is simple, the specification is unified, and loading, unloading and transportation are very convenient.

(5) Green, sustainable, economical and practical. The assembled building external protection system for the shear wall system is simple in structure, clear in force transmission path and not easy to lose. Therefore, the transition times are greatly improved, the continuous recycling can be realized, and the economic cost is lower.

Drawings

FIG. 1 is a diagram of the overall effect of the protection system.

Fig. 2 is a detailed view of the force-bearing triangular truss.

FIG. 3 is a detailed view of the support system.

FIG. 4 is a detailed view of the protection system.

Detailed Description

The invention is further illustrated by the following specific examples.

A stiffened plate bearing type construction platform without an external frame for residential buildings is shown in figure 1, and comprises a stressed triangular truss (1), truss upper chords (2), truss diagonal web members (3), truss vertical web members (4), a support system (5), bending clamping plates (6), supporting plates (7), rectangular rib plates (8), backing plates (9), a protection system (10), scaffold internal upright rods (11), scaffold external upright rods (12), scaffold cross rods (13), scaffold longitudinal rods (14), scaffold pipe connecting pieces (15), steel pipe reinforcing pieces (16), fixed opposite-penetrating bolts (17) and stressed opposite-penetrating bolts (18).

The invention has the following structural composition and connection relationship, and can be divided into a stressed structure, an enclosure structure and a node connection structure on the structural function, wherein the stressed structure can be divided into a main stressed member and a reinforcing member.

The main body stress component in the stress structure is a stress triangular truss (1) which is formed by welding an upper truss chord member (2), a truss inclined web member (3) and a truss vertical web member (4), and is connected to a shear wall body through a stress opposite-penetrating bolt (18). Wherein, the upper chord member (2) of the truss is welded with a 5 multiplied by 5 angle steel frame, a supporting steel bar with the diameter of 20mm is arranged in the frame, and a steel mesh sheet is fully paved to support the template to form a working space. The reinforcing member is formed by welding a bent clamping plate (6), a supporting plate (7), a rectangular rib plate (8) and a backing plate (9) for a supporting system (5), is connected to the shear wall body through a fixed penetrating bolt (17), and the supporting plate (7) is used for clamping an upper main body stress member.

The enclosure structure is characterized in that a protection system (10) consists of a scaffold inner vertical rod (11), a scaffold outer vertical rod (12), a scaffold cross rod (13) and a scaffold longitudinal rod (14). Wherein the inner vertical rod (11) of the scaffold, the outer vertical rod (12) of the scaffold, the cross rod (13) of the scaffold and the longitudinal rod (14) of the scaffold are fastened and connected through a fastener of the scaffold.

The node connecting structure is composed of scaffold tube connecting pieces (15) and is respectively fastened with the scaffold inner vertical rod (11) and the scaffold outer vertical rod (12) through bolts.

The stressed triangular truss (1) comprises an upper truss chord (2), a diagonal truss web member (3) and a vertical truss web member (4) as shown in fig. 2, the stressed triangular truss (1) is made of square steel pipes with the specification of 100 multiplied by 4, the length of the upper truss chord (2) is 1200mm, and a scaffold pipe connecting piece (15) is welded on the upper truss for fixing a scaffold and providing a working plane; the length of the truss diagonal web member (3) is 1300mm, and the truss diagonal web member is used for keeping the stability of the triangular frame body; the length of the truss vertical web member (4) is 1100mm, and a stressed bolt (18) is arranged on the truss vertical web member and is used for being connected with a wall body. A round hole with the diameter of 35mm is arranged at the position 100mm away from one end of the truss vertical web member (4). And scaffold pipe connecting pieces (15) are respectively welded at the positions of the upper chord (2) of the truss, which are 30mm away from the end part. One end of the truss vertical web member (4) with the opening is welded with the truss upper chord member (2), the center point of the cross section of the truss inclined web member (3) is welded at a position which is 200mm away from the unwelded end of the truss upper chord member (2) and the truss vertical web member (4), and the stressed triangular truss (1) is manufactured. The stressed triangular truss (1) is a main stressed system of the structure, is different from a main stressed member manufactured by angle steel and channel steel in the prior art, and is manufactured by a square steel pipe. Research shows that the bearing capacity of the stressed triangular truss (1) made of the square steel pipe is more than 1.5 times that of a stressed member made of equal-steel-quantity angle steel.

The supporting system (5) is composed of a bent clamping plate (6), a supporting plate (7), a rectangular rib plate (8) and a backing plate (9) as shown in figure 3, and the material is a steel plate. Wherein the specification of the bending splint (6) is 90 multiplied by 300 multiplied by 14 steel plate; a steel plate having a pallet (7) specification of 140X 100X 10; the specification of the rectangular rib plate (8) is 70 multiplied by 100 multiplied by 10 steel plate; the backing plate (9) is a steel plate with the specification of 140 multiplied by 100 multiplied by 5. The bent clamping plate (6) is bent for 30 degrees along the short side at a position 50mm away from one end, and a hole with the diameter of 26mm is drilled at the center 50mm away from the other end and is used for penetrating through a connecting bolt. The base plate (9) is provided with a hole with the diameter of 26mm at the center point for the penetration of a connecting bolt. The backing plate (9) is aligned with the hole of the bending splint (6) for welding, and the bending splint (6) is welded with the long edge of the supporting plate (7) at a position 100mm away from the end part of one side of the opening of the bending splint (6); and meanwhile, the rectangular rib plate (8) is welded in the middle of the formed right-angle position, the long side is welded with the bent clamping plate (6), the short side is welded with the supporting plate (7), and the support system (5) is manufactured. The 30-degree bending of the bending clamping plate (6) is convenient for inserting of the truss vertical web member (4) under the high-altitude construction condition, so that the whole installation process is quicker, more efficient and safer. The rectangular rib plate (8) is arranged, so that the rigidity and stability of the node are greatly improved, and the safety and reliability of the construction protection platform are improved. The support system (5) mainly restrains the out-of-plane rotation of the upper stress system and can provide certain vertical bearing capacity. The traditional wall-attached structure needs to be hoisted, and then a plurality of bolts are aligned to the outer vertical surface of the building by constructors for installation, so that the installation is difficult. According to the structure, two bolt holes in a bearing system are converted into two independent bolt holes which are respectively installed, a constructor can install the stress triangular truss (1) on a shear wall through hoisting equipment, then the stress triangular truss (1) is clamped by the constructor installation supporting system (5) and is fastened with a wall body through high-strength bolts, and the assembly difficulty is greatly reduced.

The protection system (10) is formed by connecting an inner vertical rod (11) of a scaffold, an outer vertical rod (12) of the scaffold, a cross rod (13) of the scaffold and a longitudinal rod (14) of the scaffold through fasteners as shown in figure 4. All scaffold rods are made of steel pipes with the wall thickness of 51 mm and the wall thickness of 3mm, wherein the lengths of the inner vertical rod (11) and the outer vertical rod (12) of the scaffold are 2000 mm; the length of the scaffold cross bar (13) is 1200 mm; the scaffold vertical rod (14) is flexibly selected according to the actual situation of the engineering field. The outer upright posts (12) of the scaffold, the inner upright posts (11) of the scaffold and the cross posts (13) of the scaffold form a frame, and the frames are connected by the longitudinal posts (14) of the scaffold to form an integral frame structure. During the use with pole setting (11) in the scaffold, pole setting (12) outside the scaffold insert scaffold pipe connecting piece (15) and screw up the screw and accomplish fixedly, the whole arrangement of protection system is the frame form, and anti side force all has the promotion of a wide margin with stability and provides more reliable safety protection for the construction. The traditional construction and maintenance system is generally only provided with outer enclosing rods, namely the outer upright rods (12) and the vertical rods (14) of the scaffold. According to the invention, the inner upright rods (11) and the cross rods (13) of the scaffold are added for the first time, so that the upper enclosure system forms a frame system, the formed frame system obviously improves the stability and the anti-overturning capability of the maintenance system, and the safety and the reliability of the maintenance system can be effectively improved.

The scaffold pipe connecting piece (15) is made of a round steel pipe with the length of 150mm, the diameter of 60mm and the wall thickness of 3 mm; the bolt is M24S 8.9 grade. And a hole with the diameter of 30mm is formed in the middle of the round steel pipe, and a nut corresponding to the M24 bolt is welded. The scaffold pipe connecting piece (15) is welded on the truss upper chord (2) and is fastened through bolts to complete the joint work of the protection system (10) and the stressed triangular truss (1). The scaffold pipe connecting piece (15) is creatively used, the non-main stress system is connected with the supporting system of the non-main stress system in an external maintenance system in a bolt extruding and fastening mode for the first time, the assembling speed is greatly improved, and the recycling of the upper enclosure components is facilitated.

The steel pipe reinforcing part (16) adopts a round steel pipe with the length of 100mm, the diameter of 32mm and the thickness of 3 mm. The steel pipe reinforcing piece (16) is welded in the hole formed in the truss vertical web member (4), the welding quality is strictly controlled, and after the welding is finished, grinding treatment is carried out to prevent stress concentration. The steel pipe reinforcing piece (16) is one of the innovation points of the invention, and the node is a main stress node and bears most of the load of the system. Therefore, the arrangement of the steel pipe reinforcing piece not only effectively improves the local stress state of the bolt arranged on the truss vertical web member (4), avoids the adverse effect caused by local instability, but also improves the integral bearing capacity reserve of the protection system, and further ensures the safety performance.

The fixed opposite-penetrating bolt (17) is an M24S 10.9-level high-strength bolt and is arranged on a supporting system. The fixed penetrating bolt is a structural constraint component and is used for fixing the supporting system to constrain the vertical displacement of the tripod and the rotation outside the plane.

The stress opposite-penetrating bolt (18) is an M24S 10.9-level high-strength bolt and is arranged on the truss vertical web member. The stress opposite-penetrating bolt is a main stress component of the structure and bears and transmits construction load transmitted by the protection system and the tripod.

As shown in the figure, the stiffening plate bearing type outer frame-free construction platform for the residential building comprises a stressed triangular truss (1), truss upper chords (2), truss diagonal web members (3), truss straight web members (4), a support system (5), bending clamping plates (6), supporting plates (7), rectangular rib plates (8), backing plates (9), a protection system (10), scaffold inner vertical rods (11), scaffold outer vertical rods (12), scaffold cross rods (13), scaffold longitudinal rods (14), scaffold pipe connecting pieces (15), steel pipe reinforcing pieces (16), fixed opposite-penetrating bolts (17) and stressed opposite-penetrating bolts (18).

And determining the load borne by the outer protection system according to building structure load specification, steel structure design specification and building construction scaffold safety technology unified standard, and calculating to obtain the arrangement distance of the stressed triangular trusses. The outer protection system is arranged in the required number of the two layers of the entering field, the outer protection system is fixedly arranged through the through bolt before the outer wall construction, and the required outer protection system of the next layer is arranged at the same time. And after the construction of the current floor is finished, the external protection system is detached and installed on the next floor through the tower crane, so that the flow process is formed.

In the normal use stage, the main stressed components of the invention are all in an elastic working state. The high-strength bolts on the vertical web members of the truss bear the main load of the system, so that the triangular truss is prevented from moving up and down; the bolts supporting the system provide out-of-plane stiffness, preventing out-of-plane rotation of the system. The steel pipe reinforcing part is used for locally reinforcing the bolt hole, and the problem that local instability is caused due to local extrusion easily caused by bolt penetration concentration is solved. The quality of the welding seam is strictly controlled in the factory prefabrication process, and each welding seam is ensured to reach the first-level welding seam standard.

The stiffening plate bearing type construction platform without the external frame for the residential building, which is disclosed by the invention, has the advantages of reasonable structure, reliable connection, safety, durability, environmental friendliness and suitability for protecting the outer wall of building construction.

The foregoing is an exemplary embodiment of the present invention, and the practice of the present invention is not limited thereto.

Claims (8)

1. a stiffening plate supporting type construction platform without external frame for residential building, is characterized in that: this structure is divided into stress structure, enclosure structure and node connection structure; stress structure is divided into main stress member and reinforcement member (5); The main stressed member in the stressed structure is a plurality of stressed triangular trusses (1), and the bottom of each stressed triangular truss (1) is provided with a reinforcing member (5); the reinforcing member (5) is formed by a bending splint (6). ), the support plate (7), the rectangular rib plate (8) and the backing plate (9) are welded, the bottom of the stressed triangular truss (1) is inserted by the bending splint (6), and the bending splint (6) passes through the rectangular truss (1). The rib plate (8) is fixed on the support plate (7), the lower part of the bending splint (6) is welded with a backing plate (9), and the backing plate (9) is provided with threaded holes for fixing the opposite bolts (17), The stress triangular truss (1) is connected to the shear wall by fixing the opposite bolts (17); each stress triangular truss (1) is arranged on the same plane, and the enclosure structure is fixed on the stress triangle through the node connection structure on the truss (1). 2. A stiffening plate supporting type construction platform without an outer frame for residential building according to claim 1, characterized in that: the enclosure structure comprises an inner scaffolding pole (11), an outer scaffolding pole (12) , Scaffolding cross bar (13) and scaffolding longitudinal bar (14); the scaffolding inner vertical bar (11) and the scaffolding outer vertical bar (12) are vertically installed on the triangular truss body (3), and the scaffolding horizontal bar (13) is installed Between the inner scaffolding pole (11) and the outer scaffolding pole (12), the scaffolding vertical pole (14) is installed between the adjacent scaffolding vertical poles (14), the inner scaffolding pole (11), the outer scaffolding pole (12), the scaffolding cross bar (13) and the scaffolding longitudinal bar (14) are fastened and connected by the scaffolding fasteners; the node connection structure is composed of steel pipe connection nodes (15), and the steel pipe connection nodes (15) are connected to the inner part of the scaffold through bolts. The vertical rod (11) and the outer vertical rod (12) of the scaffold are fastened. 3. A stiffening plate supporting type construction platform without an outer frame for residential buildings according to claim 1, characterized in that: the stressed triangular truss (1) is composed of a truss upper chord (2), a truss inclined The web (3) and the truss vertical web (4) are welded in sequence to form a triangular structure; the truss upper chord (2), the truss inclined web (3) and the truss vertical web (4) are all made of hot-rolled seamless square steel pipes , the upper surface of the upper chord (2) of the truss is welded with a scaffolding pipe connecting piece (15); the upper part of the vertical web bar (4) of the truss is fixed on the shear wall by force-bearing bolts (18). 4. A stiffening plate supporting type construction platform without outer frame for residential building according to claim 1, characterized in that: an angle steel frame is welded on the stressed triangular truss body (1), and supporting steel bars are provided inside, And the steel mesh is fully covered to support the template to form a working space. 5. A stiffening plate supporting type construction platform without an outer frame for residential building according to claim 1, characterized in that: a through hole is reserved at the center of the bending splint (6) and the backing plate (9) , used for the penetration of the fixing bolt (17); the support plate (7) provides partial vertical support for the stressed triangular truss (1); the bending angle of the upper part of the bending splint (6) is 30 degrees. 6. A stiffening plate supporting type construction platform without an outer frame for residential building according to claim 2, characterized in that: the inner scaffolding pole (11), the outer scaffolding pole (12), The scaffolding cross bar (13), the scaffolding longitudinal bar (14), the scaffolding pipe connecting piece (15) and the steel pipe reinforcing piece (16) are all made of hot-rolled seamless round steel pipes. 7 . The stiffening plate-supported construction platform without an outer frame according to claim 3 , wherein the fixing bolts ( 17 ) and the stress-bearing bolts ( 18 ) are high-strength bolts. 8 . 8. A stiffening plate supporting type construction platform method without an outer frame for residential building is characterized in that: the implementation process of this method is as follows, Step 1: Weld the stressed triangular truss (1) in the factory workshop, and weld the truss upper chord (2), truss diagonal web (3), and truss vertical web (4) in sequence according to the requirements of the drawings; and weld the truss The vertical web rod (4) is drilled and the steel pipe reinforcement (16) is welded; Step 2: Weld the support system (5) in the factory workshop, drill and weld the bending splint (6) and the backing plate (9), and then connect the supporting plate (7) and the rectangular rib (8) according to the drawing Welding is required; The third step: process the scaffolding pipe connector (15) in the factory workshop and weld it to the corresponding position of the upper chord (2) of the truss; prepare the inner scaffolding rod (11) and the outer scaffolding rod required for the protection system (10). (12), scaffolding cross bar (13), scaffolding vertical bar (14) materials and corresponding fasteners; Step 4: Install the support system (5) and the stressed triangular truss (1) on site. Place the support system (5) at the designated position, and then use the fixing bolts (17) to pass through the bending splint (6), the support system (5) and the holes reserved in the wall in sequence, and then tighten the bolts to complete the installation. First, insert the lower end of the truss vertical web rod (3) of the stressed triangular truss (1) into the bending splint (6) of the support system (5), and then adjust the position to pass the stressed tension bolts (18) through the truss in turn. The vertical web rod (3) and the wall are reserved for holes, and the bolts are tightened to complete the installation. Step 5: Install the protection system (10) on site; insert the inner scaffolding pole (11) and the outer scaffolding pole (12) into the corresponding scaffolding pipe connectors (15) in turn, and tighten the scaffolding tube connectors (15) The bolts on the upper part are fixed; the scaffold cross bar (13) is fixed to the scaffold inner pole (11) and the scaffold outer pole (12) through fasteners to complete the installation; Determine the spacing between the stressed triangular truss (1) and its accessory components, and connect each stressed triangular truss (1) and its accessory components through the scaffolding longitudinal rods (14) to complete the overall installation of the structure; Step 6: Lay steel mesh sheets and set up steel mesh; weld angle steel to the upper chord (2) of the truss to form a frame, and set steel bars in the frame to support the formwork; Lay the steel mesh sheet to the angle steel welded to form a frame body Work space; hang the expanded metal mesh on the vertical rod (14) of the scaffold to form a horizontal protection.

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