CN110670867A - Construction method of scaffold for improving outer vertical surface of existing building - Google Patents
Construction method of scaffold for improving outer vertical surface of existing building Download PDFInfo
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- CN110670867A CN110670867A CN201910985316.3A CN201910985316A CN110670867A CN 110670867 A CN110670867 A CN 110670867A CN 201910985316 A CN201910985316 A CN 201910985316A CN 110670867 A CN110670867 A CN 110670867A
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- connecting piece
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/007—Devices and methods for erecting scaffolds, e.g. automatic scaffold erectors
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/38—Scaffolds partly supported by the building
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
- E04G5/046—Means for fastening, supporting, or bracing scaffolds on or against building constructions for fastening scaffoldings on walls
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- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
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- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a construction method of a scaffold for reconstructing an outer vertical surface of an existing building, which comprises the following steps: firstly, construction preparation; secondly, constructing a floor scaffold; thirdly, mounting the first connecting wall piece; fourthly, mounting the second wall connecting piece; fifthly, mounting a third wall connecting piece; sixthly, mounting a fourth wall connecting piece; seventh, installation of the fifth wall connecting piece; and eighthly, constructing the cantilever scaffold. The method has simple steps, convenient construction and easy operation, the floor scaffold and the cantilever scaffold are fixedly connected with the outer vertical surface of the existing building through the five wall connecting pieces, the method is stable and reliable, the method is suitable for the outer vertical surfaces of the existing buildings with various structures, the five wall connecting pieces are used in a complete set, the reconstruction of the outer vertical surface of the existing building within 24m in height can be met through the combination of the floor scaffold and the cantilever scaffold, and the method is convenient to popularize and use.
Description
Technical Field
The invention belongs to the technical field of scaffold construction for building facade transformation, and particularly relates to a scaffold construction method for existing building facade transformation.
Background
With the continuous improvement of the Chinese economic level and the continuous development of the construction industry, the aesthetic concept of public buildings is changed, and more existing building facades cannot meet the use requirements. Therefore, the number of existing building facade modification works is rapidly increasing in recent years.
The method for erecting the external scaffold in the main structure construction stage is quite mature, the wall attaching pieces can embrace columns, anchor beams and anchor plates, the wall connecting pieces are flexibly distributed, and damage to the external surface is not considered. However, existing buildings often have decorative surfaces such as glass curtain walls, stone curtain walls and stone-like paint outer walls, ventilation and lighting of windows cannot be affected, arrangement of wall connecting pieces is strictly limited, construction environments cannot be completely closed, and when the outer vertical surfaces are transformed and constructed, cross operation, object striking, high-altitude falling and other dangerous sources exist in normal use of the existing buildings. Therefore, a scaffold construction method for modifying the outer vertical surface of the existing building is lacked at present, and the scaffold construction method is suitable for a construction site for modifying the outer vertical surface of the existing building.
Disclosure of Invention
The invention aims to solve the technical problem that the construction method of the scaffold for reconstructing the outer vertical surface of the existing building is provided aiming at the defects in the prior art, the construction method is simple in steps, convenient to construct and easy to operate, the floor scaffold and the cantilever scaffold are fixedly connected with the outer vertical surface of the existing building through five wall connecting pieces, the construction method is stable and reliable, the scaffold is suitable for the outer vertical surfaces of the existing buildings with various structures, the five wall connecting pieces are used in a complete set, the reconstruction of the outer vertical surface of the existing building within the height of 24m can be met through the combination of the floor scaffold and the cantilever scaffold, and the scaffold is convenient to popularize and use.
In order to solve the technical problems, the invention adopts the technical scheme that: a construction method of a scaffold for reconstructing an outer vertical surface of an existing building is characterized by comprising the following steps:
step one, construction preparation: detecting the bearing capacity of a foundation at the position of a floor scaffold installed on site, leveling and tamping the site if the bearing capacity of the foundation is insufficient, determining an actual installation point, positioning and paying off to form the actual installation position of the floor scaffold to be built; the mounting points comprise an outer vertical surface wall connecting piece mounting point and a ground mounting point;
step two, constructing the floor scaffold:
step 201, paving a base plate at the bottom of an actual installation position of a floor type scaffold, constructing the floor type scaffold at the actual installation position of the floor type scaffold, wherein the width of the floor type scaffold is not less than that of an existing building, the highest point of the floor type scaffold is positioned below the bottom surface of an overhanging structure of an outer vertical surface of the existing building, the floor type scaffold adopts a double-row floor type scaffold, the floor type scaffold comprises a stand column, a longitudinal horizontal rod and a transverse horizontal rod, the stand column comprises a plurality of floor vertical rods, the floor vertical rods are erected one by one from one end of the existing building, joints of adjacent floor vertical rods are staggered, and the bottoms of the floor vertical rods are arranged on the base plate; the longitudinal horizontal rods are horizontal rods in the length direction of the outer vertical surface of the existing building, and the transverse horizontal rods are horizontal rods perpendicular to the longitudinal horizontal rods;
202, placing the floor vertical floor sweeping rod, fastening the floor vertical rod through a right angle, placing the floor horizontal floor sweeping rod, and fastening the floor vertical rod through a right angle fastener; the floor longitudinal floor sweeping rod is a horizontal rod in the length direction of the outer vertical surface of the existing building, and the floor transverse floor sweeping rod is a horizontal rod perpendicular to the longitudinal horizontal rod;
step 203, sequentially installing the longitudinal horizontal rods and the transverse horizontal rods layer by layer from bottom to top, and installing wall connecting pieces, transverse inclined struts, scissor struts and scaffold boards as required in the layer-by-layer installation process of the longitudinal horizontal rods and the transverse horizontal rods;
the method comprises the following steps that wall connecting pieces are arranged in a two-step two-span arrangement mode from a bottom longitudinal horizontal rod, and the floor scaffold is connected with a wall of a bottom outer vertical surface of an existing building through the wall connecting pieces;
when the distance between the wall connecting piece and the longitudinal floor sweeping rod is two steps, connecting the floor scaffold with a wall of the outer vertical surface of the bottom layer of the existing building by adopting a first wall connecting piece, and executing a second step;
when the wall connecting piece is positioned above the first wall connecting piece and is used for being connected with the wall of the outer vertical surface of the existing building, a second wall connecting piece is adopted, the second wall connecting piece connects the floor scaffold with the wall of the outer vertical surface of the bottom layer of the existing building, and the third step is executed;
when the wall connecting piece is used for connecting with an outer vertical face floor slab of an existing building, connecting the floor scaffold with the outer vertical face floor slab of the existing building by adopting a third wall connecting piece, and executing the step four;
mounting a fourth wall connecting piece on the floor standing rod between the third wall connecting piece and the second wall connecting piece to connect the floor scaffold with a wall of the bottom outer vertical surface of the existing building, and executing a fifth step;
arranging a fifth wall connecting piece at a position where the top of the floor scaffold is matched with the bottom surface of the overhanging structure of the outer vertical surface of the existing building, connecting the floor scaffold with the bottom surface of the overhanging structure of the outer vertical surface of the existing building by the fifth wall connecting piece, and executing the sixth step;
step 204, arranging a door opening at the entrance and exit of the existing building;
step 205, building a pedestrian-near safety channel;
step three, mounting a first wall connecting piece:
step 301, drilling a first mounting hole in the bottom layer outer vertical surface of the existing building where the outer vertical surface wall connecting piece mounting point corresponding to the first wall connecting piece is located, penetrating one end of a first anchor rod into the first mounting hole through a first steel plate, and anchoring the first steel plate on the bottom layer outer vertical surface of the existing building by the first anchor rod;
step 302, welding a sleeve at the geometric center of the first steel plate, wherein the central axis of the sleeve is perpendicular to the first steel plate;
303, inserting one end of the first transverse horizontal rod into a sleeve, sequentially penetrating a first pin through the sleeve and the first transverse horizontal rod along a direction vertical to the ground to fixedly connect the first transverse horizontal rod with the first connecting wall member, and filling the space between the first transverse horizontal rod and the first connecting wall member with wood chips;
the first steel plate, the first anchor rod, the sleeve and the first pin form a first connecting wall piece;
step four, mounting a second wall connecting piece:
step 401, drilling a second mounting hole in the bottom layer outer vertical surface of the existing building where the outer vertical surface wall connecting piece mounting point corresponding to the second wall connecting piece is located, enabling one end of a second anchor rod to penetrate through a second steel plate and extend into the second mounting hole, and enabling the second anchor rod to anchor the second steel plate on the bottom layer outer vertical surface of the existing building;
step 402, welding two side plates which are perpendicular to the second steel plate, perpendicular to the ground and parallel to each other on the second steel plate along the position of the second steel plate which is symmetrical with the geometric center of the second steel plate, wherein the bottoms of the two side plates are connected through a transverse plate welded on the side plates;
step 403, the transverse horizontal rod corresponding to the mounting point of the outer vertical wall connecting piece corresponding to the second wall connecting piece is a second transverse horizontal rod, one end of the second transverse horizontal rod is placed on the transverse plate, and a second pin sequentially penetrates through the side plate and the second transverse horizontal rod to connect the second transverse horizontal rod with the second wall connecting piece;
the second steel plate, the second anchor rod, the two side plates, the transverse plate and the second pin form a second wall connecting piece;
step five, mounting a third wall connecting piece:
step 501, drilling a third installation hole vertical to the ground on an outer vertical face floor slab of the existing building where an outer vertical face wall connecting piece installation point corresponding to a third wall connecting piece is located, penetrating one end of a third anchor rod into the hole through a third steel plate, and anchoring the third steel plate on the outer vertical face floor slab of the existing building by the third anchor rod;
502, welding a vertical steel pipe at the geometric center of a third steel plate;
step 503, the transverse horizontal rod corresponding to the mounting point of the outer vertical surface wall connecting piece corresponding to the third wall connecting piece is a third transverse horizontal rod, the third transverse horizontal rod is arranged on the outer side wall of the vertical steel pipe, and a third pin sequentially penetrates through the vertical steel pipe and the third transverse horizontal rod to fixedly connect the third transverse horizontal rod with the third wall connecting piece;
the third steel plate, the third anchor rod, the vertical steel pipe and the third pin form a third wall connecting piece;
step six, mounting a fourth wall connecting piece:
601, enabling the transverse horizontal rod corresponding to the mounting point of the outer vertical wall connecting piece corresponding to the fourth wall connecting piece to be a fourth transverse horizontal rod, and enabling one end of the fourth transverse horizontal rod to abut against the outer vertical surface of the bottom layer of the existing building;
step 602, the fourth wall connecting piece comprises two opposite-pulling screw rods which are respectively arranged at the upper side and the lower side of a fourth transverse horizontal rod, a fourth mounting hole is drilled on the outer vertical surface of the bottom layer of the existing building where the outer vertical surface wall connecting piece mounting point corresponding to the fourth wall connecting piece is located, and one end of each of the two opposite-pulling screw rods penetrates through the fourth mounting hole to be anchored in the outer vertical surface of the bottom layer of the existing building;
step 603, the other ends of the two opposite pull screw rods penetrate through the floor vertical rods corresponding to the outer vertical surface wall connecting piece mounting points corresponding to the fourth wall connecting piece, and the floor vertical rods are connected with the outer vertical surface of the bottom layer of the existing building;
step seven, installing a fifth wall connecting piece:
step 701, drilling a fifth mounting hole in the bottom surface of the overhanging structure of the existing building outer vertical surface where the mounting point of the outer vertical surface wall connecting piece corresponding to the fifth wall connecting piece is located, penetrating one end of a fourth anchor rod into the fifth mounting hole through a fourth steel plate, and anchoring the fourth steel plate on the bottom surface of the overhanging structure of the existing building outer vertical surface by the fourth anchor rod;
step 702, welding two vertical plates which are perpendicular to the fourth steel plate, perpendicular to the bottom surface of the cantilever structure and parallel to each other on the fourth steel plate along the position of the fourth steel plate which is symmetrical with the geometric center;
703, connecting a fifth wall connecting piece with the floor scaffold through an inclined rod, arranging one end of the inclined rod between two fourth steel plates, sequentially penetrating the fourth steel plates and the inclined rod through a fourth pin to connect the inclined rod with the fifth wall connecting piece, and connecting the other end of the inclined rod with the floor scaffold through a rotary fastener;
a fifth wall connecting piece is formed by the fourth steel plate, the fourth anchor rod, the two vertical plates and the fourth pin;
step eight, construction of the cantilever scaffold:
801, determining the installation position of an anchoring installation foundation of an overhanging scaffold by detecting the strength of an overhanging outer vertical surface of an existing building and an internal structure of the building, and building the anchoring installation foundation at the installation position of the anchoring installation foundation of the overhanging scaffold;
step 802, the scaffold that encorbelments on anchor installation basis is under construction, the scaffold that encorbelments is including the pole setting of encorbelmenting, the pole of vertically sweeping floor of encorbelmenting and the horizontal pole of sweeping floor of encorbelmenting, and the pole setting of vertically sweeping floor of encorbelmenting, the pole of vertically sweeping floor of encorbelmenting and the connection mode of the horizontal pole of sweeping floor of encorbelmenting are the same with the pole setting of falling to the ground in the floor scaffold, the pole of vertically sweeping floor of falling to the ground and the connection mode of the horizontal pole of sweeping floor.
The construction method of the scaffold for reconstructing the outer vertical surface of the existing building is characterized by comprising the following steps of: the height range of the existing building is 6-24 m.
The construction method of the scaffold for reconstructing the outer vertical surface of the existing building is characterized by comprising the following steps of: when the external elevation construction is carried out on the existing building with the height range of 24-50 m, the combined structure construction of a landing scaffold, an overhanging scaffold, a hanging frame and a hanging basket is adopted; when the external vertical face construction is carried out on the existing building with the height ranging from 50m to 100m, the combined structure construction of the hanging frame and the hanging basket is adopted.
The construction method of the scaffold for reconstructing the outer vertical surface of the existing building is characterized by comprising the following steps of: the inclination of the bottom surface of the overhanging structure of the existing building facade is more than 0 and less than infinity.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, different types of wall connecting pieces are arranged according to different conditions of the outer vertical surface of the existing building to connect the scaffold structure with the existing building, so that the damage to the outer vertical surface of the existing building is reduced while the stability and the safety of the scaffold structure are ensured, the pollution to the existing building is reduced, the reconstruction of the outer vertical surface of the existing building is effectively completed, the problem that the mode of building an outer scaffold in construction engineering is not suitable for the reconstruction of the outer vertical surface of the existing building is solved, and the method is convenient to popularize and use.
2. The first wall connecting piece is arranged at the bottom of the scaffold, and the sleeve and the first transverse horizontal rod are connected to form the fixedly connected wall connecting piece, so that the connecting form of the fixedly connected wall connecting piece has no degree of freedom, and the stability of the bottom foundation of the scaffold structure is ensured.
3. According to the invention, the two side plates and the transverse plate of the second wall connecting piece form the U-shaped steel plate, the second transverse horizontal rod is arranged in the U-shaped steel plate, so that the scaffold structure is stably connected with the outer vertical surface of the existing building, an upward supporting force is provided for the whole scaffold structure, the scaffold structure is prevented from deforming due to the action of gravity, accident potential is prevented, the stability of the scaffold structure is ensured, and the scaffold structure is simple in structure and easy to install.
4. The third wall connecting piece is installed when the wall connecting piece needs to be connected with the floor slab of the outer vertical surface of the existing building, is simple in structure, greatly reduces damage to the floor slab of the outer vertical surface of the existing building, and is economical and practical; the fourth wall connecting piece forms a jacking wall connecting piece through the combination of the two opposite-pulling screw rods, the connection strength of the scaffold structure is enhanced by the jacking wall connecting piece, the instability of the third wall connecting piece is compensated, and the scaffold is reliable, stable and good in using effect.
5. The inclined rod is arranged between the two vertical plates of the fifth wall connecting piece, the connecting form has certain degree of freedom, the inclined rod can be arranged on the bottom surface of the overhanging structure of the outer vertical surface of the existing building with different slopes, the application range is wide, and meanwhile, the connecting stability of the scaffold structure and the overhanging structure of the outer vertical surface of the existing building is ensured.
6. The method has simple steps, the floor scaffold and the cantilever scaffold are fixedly connected with the outer vertical surface of the existing building through the five wall connecting pieces, the method is stable and reliable, the method is suitable for the outer vertical surfaces of the existing buildings with various structures, the five wall connecting pieces are used in a complete set, the reconstruction of the outer vertical surface of the existing building within the height of 24m can be met through the combination of the floor scaffold and the cantilever scaffold, and the method is convenient to popularize and use.
In conclusion, the floor scaffold and the overhanging scaffold are fixedly connected with the outer vertical surface of the existing building through the five wall connecting pieces, the wall connecting piece is stable and reliable, is suitable for the outer vertical surfaces of the existing buildings with various structures, is used in a whole set through the five wall connecting pieces, can meet the requirement of the transformation of the outer vertical surface of the existing building within 24m in height through the combination of the floor scaffold and the overhanging scaffold, and is convenient to popularize and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a block diagram of a process flow of the method of the present invention.
Fig. 2 is a schematic view of the field installation structure of the landing scaffold and the overhanging scaffold of the invention and the external facade of the existing building.
Fig. 3 is a schematic structural view of the first connecting wall member of the present invention.
Fig. 4 is a schematic structural view of a second wall connecting member according to the present invention.
Fig. 5 is a schematic structural view of a third wall connecting member according to the present invention.
Fig. 6 is a schematic structural view of a fourth wall connecting member according to the present invention.
Fig. 7 is a schematic structural view of a fifth wall connecting member according to the present invention.
Description of reference numerals:
1-landing upright stanchion; 2-floor longitudinal sweeping bar; 3-a floor transverse sweeping rod;
4-the outer vertical surface of the bottom layer of the existing building; 5, overhanging outer vertical surface of the existing building;
6-overhanging the bottom surface of the structure; 7-a first connecting wall member; 7-1-a first steel plate;
7-2-a first anchor; 7-3-sleeve; 7-4-a first pin;
8-a first transverse horizontal bar; 9-a second wall connecting piece; 9-1-a second steel plate;
9-2-second anchor; 9-3-side plate; 9-4-a transverse plate;
9-5-a second pin; 10-a second transverse horizontal bar; 11-a third wall connecting piece;
11-1-third steel plate; 11-2-third anchor; 11-3-vertical steel pipes;
11-4-a third pin; 12-a third transverse horizontal bar; 13-oppositely pulling screw rods;
14-a fourth transverse horizontal bar; 15-a fifth wall connecting piece; 15-1-fourth steel plate;
15-2-fourth anchor; 15-3-standing plate; 15-4-fourth pin;
16-a diagonal rod; 17-anchoring the installation foundation; 18-a basket;
19-pedestrian-present safety passage; 20-a facade floor; 21-overhanging vertical rod;
22-overhanging longitudinal sweeping bar; 23-overhanging transverse sweeping bar.
Detailed Description
As shown in fig. 1 to 7, the method for constructing a scaffold for modifying an external elevation of an existing building according to the present invention includes the steps of:
step one, construction preparation: detecting the bearing capacity of a foundation at the position of a floor scaffold installed on site, leveling and tamping the site if the bearing capacity of the foundation is insufficient, determining an actual installation point, positioning and paying off to form the actual installation position of the floor scaffold to be built; the mounting points comprise an outer vertical surface wall connecting piece mounting point and a ground mounting point;
step two, constructing the floor scaffold:
step 201, paving a base plate at the bottom of an actual installation position of a floor type scaffold, constructing the floor type scaffold at the actual installation position of the floor type scaffold, wherein the width of the floor type scaffold is not less than that of an existing building, the highest point of the floor type scaffold is positioned below an overhanging structure bottom surface 6 of an outer vertical surface of the existing building, the floor type scaffold adopts a double-row floor type scaffold, the floor type scaffold comprises a stand column, a longitudinal horizontal rod and a transverse horizontal rod, the stand column comprises a plurality of floor vertical rods 1, the floor vertical rods 1 are erected one by one from one end of the existing building, joints of adjacent floor vertical rods 1 are staggered, and the bottom of the floor vertical rod 1 is arranged on the base plate; the longitudinal horizontal rods are horizontal rods in the length direction of the outer vertical surface of the existing building, and the transverse horizontal rods are horizontal rods perpendicular to the longitudinal horizontal rods;
202, placing a floor vertical floor sweeping rod 2, fastening the floor vertical rod 1 through a right angle, placing a floor horizontal floor sweeping rod 3, and fastening the floor vertical rod 1 through a right angle fastener; the floor longitudinal floor sweeping rod 2 is a horizontal rod along the length direction of the outer vertical surface of the existing building, and the floor transverse floor sweeping rod 3 is a horizontal rod perpendicular to the longitudinal horizontal rod;
step 203, sequentially installing the longitudinal horizontal rods and the transverse horizontal rods layer by layer from bottom to top, and installing wall connecting pieces, transverse inclined struts, scissor struts and scaffold boards as required in the layer-by-layer installation process of the longitudinal horizontal rods and the transverse horizontal rods;
the method comprises the following steps that wall connecting pieces are arranged in a two-step two-span arrangement mode from a bottom longitudinal horizontal rod, and the wall connecting pieces are used for connecting the floor scaffold with a wall of a bottom-layer outer vertical surface 4 of an existing building;
when the distance between the wall connecting piece and the longitudinal floor sweeping rod 2 is two steps, connecting the floor scaffold with the wall of the bottom layer outer vertical surface 4 of the existing building by adopting a first wall connecting piece 7, and executing a second step;
when the wall connecting piece is positioned above the first wall connecting piece 7 and is used for being connected with the wall of the outer vertical surface of the existing building, a second wall connecting piece 9 is adopted, the second wall connecting piece 9 is used for connecting the floor scaffold with the wall of the outer vertical surface 4 of the bottom layer of the existing building, and the third step is executed;
when the wall connecting piece is used for connecting with the outer vertical face floor slab 20 of the existing building, the third wall connecting piece 11 is adopted for connecting the floor scaffold with the outer vertical face floor slab 20 of the existing building, and the step four is executed;
mounting a fourth wall connecting piece 13 on the floor standing rod 1 between the third wall connecting piece 11 and the second wall connecting piece 9 to connect the floor scaffold with the wall of the bottom outer vertical surface 4 of the existing building, and executing a fifth step;
arranging a fifth wall connecting piece 15 at the position where the top of the floor scaffold is matched with the overhanging structure bottom surface 6 of the existing building facade, connecting the floor scaffold with the overhanging structure bottom surface 6 of the existing building facade by the fifth wall connecting piece 15, and executing a sixth step, wherein the inclination of the overhanging structure bottom surface 6 of the existing building facade is more than 0 and less than infinity;
step 204, arranging a door opening at the entrance and exit of the existing building;
step 205, building a pedestrian-crossing safety passage 19;
step three, mounting a first wall connecting piece:
step 301, drilling a first mounting hole in the bottom layer outer vertical surface 4 of the existing building where the outer vertical surface wall connecting piece mounting point corresponding to the first wall connecting piece 7 is located, enabling one end of a first anchor rod 7-2 to penetrate through a first steel plate 7-1 to extend into the first mounting hole, and enabling the first anchor rod 7-2 to anchor the first steel plate 7-1 to the bottom layer outer vertical surface 4 of the existing building;
step 302, welding a sleeve 7-3 at the geometric center of the first steel plate 7-1, wherein the central axis of the sleeve 7-3 is vertical to the first steel plate 7-1;
303, inserting one end of the first transverse horizontal rod 8 into a sleeve 7-3, sequentially penetrating a first pin 7-4 through the sleeve 7-3 and the first transverse horizontal rod 8 along a direction vertical to the ground to fixedly connect the first transverse horizontal rod 8 with the first connecting wall 7, and filling the space between the first transverse horizontal rod 8 and the first connecting wall 7 with wood chips;
the first steel plate 7-1, the first anchor rod 7-2, the sleeve 7-3 and the first pin 7-4 form a first connecting wall part 7;
it should be noted that, the first wall connecting piece 7 is arranged at the bottom of the scaffold, and the sleeve 7-3 is connected with the first horizontal rod 8 to form a fixed wall connecting piece, and the fixed wall connecting piece has no freedom of connection form, so that the stability of the bottom foundation of the scaffold structure is ensured.
Step four, mounting a second wall connecting piece:
step 401, drilling a second mounting hole in the bottom layer outer vertical surface 4 of the existing building where the outer vertical surface wall connecting piece mounting point corresponding to the second wall connecting piece 9 is located, enabling one end of a second anchor rod 9-2 to penetrate through a second steel plate 9-1 to extend into the second mounting hole, and enabling the second anchor rod 9-2 to anchor the second steel plate 9-1 to the bottom layer outer vertical surface 4 of the existing building;
step 402, welding two side plates 9-3 which are perpendicular to the second steel plate 9-1, perpendicular to the ground and parallel to each other on the second steel plate 9-1 along the geometric center of the second steel plate 9-1, wherein the bottoms of the two side plates 9-3 are connected through a transverse plate 9-4 welded on the side plate 9-3;
step 403, the transverse horizontal rod corresponding to the mounting point of the facade wall connecting piece corresponding to the second wall connecting piece 9 is a second transverse horizontal rod 10, one end of the second transverse horizontal rod 10 is placed on the transverse plate 9-4, and a second pin 9-5 sequentially penetrates through the side plate 9-3 and the second transverse horizontal rod 10 to connect the second transverse horizontal rod 10 with the second wall connecting piece 9;
a second steel plate 9-1, a second anchor rod 9-2, two side plates 9-3, a transverse plate 9-4 and a second pin 9-5 form a second wall connecting piece 9;
it should be noted that the two side plates 9-3 and the transverse plate 9-4 of the second wall connecting piece 9 form a U-shaped steel plate, and a second horizontal rod 10 is installed in the U-shaped steel plate, so that the scaffold structure is stably connected with the outer facade of the existing building, an upward supporting force is provided for the whole scaffold structure, the scaffold structure is prevented from deforming due to the action of gravity, the accident potential is generated, the stability of the scaffold structure is ensured, and the structure is simple and easy to install.
Step five, mounting a third wall connecting piece:
step 501, drilling a third installation hole perpendicular to the ground in an outer vertical face floor slab 20 of the existing building where an outer vertical face wall connecting piece installation point corresponding to a third wall connecting piece 11 is located, enabling one end of a third anchor rod 11-2 to penetrate through a third steel plate 11-1 to extend into the hole, and enabling the third anchor rod 11-2 to anchor the third steel plate 11-1 to the outer vertical face floor slab 20 of the existing building;
502, welding a vertical steel pipe 11-3 at the geometric center of a third steel plate 11-1;
step 503, the transverse horizontal rod corresponding to the mounting point of the facade wall connecting piece corresponding to the third wall connecting piece 11 is a third transverse horizontal rod 12, the third transverse horizontal rod 12 is arranged on the outer side wall of the vertical steel pipe 11-3, and the third transverse horizontal rod 12 is fixedly connected with the third wall connecting piece 11 by a third pin 11-4 which sequentially penetrates through the vertical steel pipe 11-3 and the third transverse horizontal rod 12;
a third steel plate 11-1, a third anchor rod 11-2, a vertical steel pipe 11-3 and a third pin 11-4 form a third wall connecting piece 11;
step six, mounting a fourth wall connecting piece:
601, enabling the transverse horizontal rod corresponding to the mounting point of the outer vertical wall connecting piece corresponding to the fourth wall connecting piece to be a fourth transverse horizontal rod 14, and enabling one end of the fourth transverse horizontal rod 14 to abut against the outer vertical surface 4 of the bottom layer of the existing building;
step 602, the fourth wall connecting piece comprises two counter-pulling screw rods 13 respectively arranged at the upper side and the lower side of a fourth transverse horizontal rod 14, a fourth mounting hole is drilled on the outer vertical surface 4 of the bottom layer of the existing building where the outer vertical surface wall connecting piece mounting point corresponding to the fourth wall connecting piece is located, and one end of each of the two counter-pulling screw rods 13 penetrates through the fourth mounting hole to be anchored in the outer vertical surface 4 of the bottom layer of the existing building;
step 603, the other ends of the two opposite pull screws 13 penetrate through the floor vertical rod 1 corresponding to the outer vertical wall connecting piece mounting point corresponding to the fourth wall connecting piece, and the floor vertical rod 1 is connected with the outer vertical surface 4 of the bottom layer of the existing building;
it should be noted that the third wall connecting piece 11 is installed when the wall connecting piece needs to be connected with the outer vertical face floor slab 20 of the existing building, and the third wall connecting piece 11 has a simple structure, greatly reduces the damage to the outer vertical face floor slab 20 of the existing building, and is economical and practical; the fourth wall connecting piece forms a jacking wall connecting piece through the combination of the two opposite-pulling screw rods 13, the connection strength of the scaffold structure is enhanced by the jacking wall connecting piece, the instability of the third wall connecting piece 11 is compensated, and the scaffold is reliable, stable and good in using effect.
Step seven, installing a fifth wall connecting piece:
step 701, drilling a fifth mounting hole in the bottom surface 6 of the overhanging structure of the existing building facade where the mounting point of the facade wall connecting piece corresponding to the fifth wall connecting piece 15 is located, extending one end of a fourth anchor rod 15-2 into the fifth mounting hole through a fourth steel plate 15-1, and anchoring the fourth steel plate 15-1 on the bottom surface 6 of the overhanging structure of the existing building facade by the fourth anchor rod 15-2;
702, welding two vertical plates 15-3 which are perpendicular to the fourth steel plate 15-1, perpendicular to the bottom surface 6 of the cantilever structure and parallel to each other at the position, symmetrical along the geometric center of the fourth steel plate 15-1, on the fourth steel plate 15-1;
703, connecting a fifth wall connecting piece 15 with the floor scaffold through an inclined rod 16, arranging one end of the inclined rod 16 between two fourth steel plates 15-1, sequentially penetrating the fourth steel plates 15-1 and the inclined rod 16 through a fourth pin 15-4 to connect the inclined rod 16 with the fifth wall connecting piece 15, and connecting the other end of the inclined rod 16 with the floor scaffold through a rotary fastener;
a fifth wall connecting piece 15 is formed by a fourth steel plate 15-1, a fourth anchor rod 15-2, two vertical plates 15-3 and a fourth pin 15-4;
it should be noted that the diagonal rod 16 is installed between the two vertical plates 15-3 of the fifth wall connecting member 15, and the connection form has a certain degree of freedom, and can be installed on the bottom surface 6 of the overhanging structure of the existing building facade with different slopes, so that the application range is wide, and meanwhile, the connection stability of the scaffold structure and the overhanging structure of the existing building facade is ensured.
Step eight, construction of the cantilever scaffold:
801, determining the installation position of the anchoring installation foundation 17 of the overhanging scaffold by detecting the strength of the overhanging outer vertical surface 5 of the existing building and the internal structure of the building, and building the anchoring installation foundation 17 at the installation position of the anchoring installation foundation 17 of the overhanging scaffold;
step 802, the scaffold of encorbelmenting is under construction on anchor installation basis 17, the scaffold of encorbelmenting is including the pole setting 21 of encorbelmenting, the vertical pole 22 of sweeping the floor of encorbelmenting and the horizontal pole 23 of sweeping the floor of encorbelmenting, and the pole setting 21 of encorbelmenting, the vertical pole 22 of sweeping the floor of encorbelmenting and the horizontal pole 23 of sweeping the floor of encorbelmenting are connected the same with the floor scaffold in the pole setting 1 of falling to the ground, fall to the ground vertical pole 2 of sweeping the floor and the horizontal pole 3 of sweeping the floor of falling.
In this embodiment, the height of the existing building ranges from 6m to 24 m.
In the embodiment, when the external elevation construction is carried out on the existing building with the height ranging from 24m to 50m, the combined structure of a landing scaffold, an overhanging scaffold, a hanging frame and a hanging basket 18 is adopted for construction; when the external elevation construction is carried out on the existing building with the height ranging from 50m to 100m, the combined structure of the hanging frame and the hanging basket 18 is adopted for construction.
In this embodiment, the inclination of the overhanging structure bottom surface 6 of the existing building facade is greater than 0 and less than infinity.
In conclusion, the floor scaffold and the overhanging scaffold are fixedly connected with the outer vertical surface of the existing building through the five wall connecting pieces, the wall connecting piece is stable and reliable, is suitable for the outer vertical surfaces of the existing buildings with various structures, is used in a whole set through the five wall connecting pieces, can meet the requirement of the transformation of the outer vertical surface of the existing building within 24m in height through the combination of the floor scaffold and the overhanging scaffold, and is convenient to popularize and use.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (4)
1. A construction method of a scaffold for reconstructing an outer vertical surface of an existing building is characterized by comprising the following steps:
step one, construction preparation: detecting the bearing capacity of a foundation at the position of a floor scaffold installed on site, leveling and tamping the site if the bearing capacity of the foundation is insufficient, determining an actual installation point, positioning and paying off to form the actual installation position of the floor scaffold to be built; the mounting points comprise an outer vertical surface wall connecting piece mounting point and a ground mounting point;
step two, constructing the floor scaffold:
step 201, paving a base plate at the bottom of an actual installation position of a floor type scaffold, constructing the floor type scaffold at the actual installation position of the floor type scaffold, wherein the width of the floor type scaffold is not less than that of an existing building, the highest point of the floor type scaffold is positioned below an overhanging structure bottom surface (6) of an outer vertical surface of the existing building, the floor type scaffold adopts a double-row floor type scaffold, the floor type scaffold comprises a stand column, a longitudinal horizontal rod and a transverse horizontal rod, the stand column comprises a plurality of floor vertical rods (1), the floor vertical rods (1) are erected one by one from one end of the existing building, joints of the adjacent floor vertical rods (1) are staggered, and the bottoms of the floor vertical rods (1) are arranged on the base plate; the longitudinal horizontal rods are horizontal rods in the length direction of the outer vertical surface of the existing building, and the transverse horizontal rods are horizontal rods perpendicular to the longitudinal horizontal rods;
202, placing the floor vertical floor sweeping rod (2), fastening the floor vertical rod (1) through a right angle, placing the floor horizontal floor sweeping rod (3), and fastening the floor vertical rod (1) through a right angle fastener; the floor longitudinal floor sweeping rod (2) is a horizontal rod along the length direction of the outer vertical surface of the existing building, and the floor transverse floor sweeping rod (3) is a horizontal rod perpendicular to the longitudinal horizontal rod;
step 203, sequentially installing the longitudinal horizontal rods and the transverse horizontal rods layer by layer from bottom to top, and installing wall connecting pieces, transverse inclined struts, scissor struts and scaffold boards as required in the layer-by-layer installation process of the longitudinal horizontal rods and the transverse horizontal rods;
the method comprises the following steps that wall connecting pieces are arranged in a two-step two-span arrangement mode from a bottom longitudinal horizontal rod, and the floor scaffold is connected with a wall of a bottom outer vertical surface (4) of an existing building through the wall connecting pieces;
when the distance between the wall connecting piece and the longitudinal floor sweeping rod (2) is two steps, connecting the floor scaffold with the wall of the bottom-layer outer vertical surface (4) of the existing building by adopting a first wall connecting piece (7), and executing a second step;
when the wall connecting piece is positioned above the first wall connecting piece (7) and is used for being connected with the wall of the outer vertical surface of the existing building, a second wall connecting piece (9) is adopted, the second wall connecting piece (9) connects the floor scaffold with the wall of the outer vertical surface (4) of the bottom layer of the existing building, and the third step is executed;
when the wall connecting piece is used for connecting with an outer vertical face floor (20) of the existing building, the third wall connecting piece (11) is adopted for connecting the floor scaffold with the outer vertical face floor (20) of the existing building, and the step four is executed;
mounting a fourth wall connecting piece (13) on the floor standing rod (1) between the third wall connecting piece (11) and the second wall connecting piece (9) to connect the floor scaffold with the wall of the bottom-layer outer vertical surface (4) of the existing building, and executing a fifth step;
arranging a fifth wall connecting piece (15) at the position where the top of the floor scaffold is matched with the bottom surface (6) of the overhanging structure of the existing building facade, and connecting the floor scaffold with the bottom surface (6) of the overhanging structure of the existing building facade by the fifth wall connecting piece (15) to execute the sixth step;
step 204, arranging a door opening at the entrance and exit of the existing building;
step 205, setting up a pedestrian-crossing safety passage (19);
step three, mounting a first wall connecting piece:
step 301, drilling a first mounting hole in an existing building bottom layer outer vertical surface (4) where an outer vertical surface wall connecting piece mounting point corresponding to a first wall connecting piece (7) is located, enabling one end of a first anchor rod (7-2) to penetrate through a first steel plate (7-1) and extend into the first mounting hole, and enabling the first steel plate (7-1) to be anchored on the existing building bottom layer outer vertical surface (4) through the first anchor rod (7-2);
step 302, welding a sleeve (7-3) at the geometric center of the first steel plate (7-1), wherein the central axis of the sleeve (7-3) is vertical to the first steel plate (7-1);
303, inserting one end of the first transverse horizontal rod (8) into a sleeve (7-3), sequentially penetrating a first pin (7-4) through the sleeve (7-3) and the first transverse horizontal rod (8) along the direction vertical to the ground to fixedly connect the first transverse horizontal rod (8) with the first connecting wall member (7), and filling the space between the first transverse horizontal rod (8) and the first connecting wall member (7) with wood chips;
the first steel plate (7-1), the first anchor rod (7-2), the sleeve (7-3) and the first pin (7-4) form a first connecting wall part (7);
step four, mounting a second wall connecting piece:
step 401, drilling a second mounting hole in the bottom layer outer vertical surface (4) of the existing building where the outer vertical surface wall connecting piece mounting point corresponding to the second wall connecting piece (9) is located, enabling one end of a second anchor rod (9-2) to penetrate through a second steel plate (9-1) and extend into the second mounting hole, and enabling the second anchor rod (9-2) to anchor the second steel plate (9-1) on the bottom layer outer vertical surface (4) of the existing building;
step 402, welding two side plates (9-3) which are perpendicular to the second steel plate (9-1), perpendicular to the ground and parallel to each other on the second steel plate (9-1) along the geometric center symmetrical position of the second steel plate (9-1), wherein the bottoms of the two side plates (9-3) are connected through a transverse plate (9-4) welded on the side plates (9-3);
step 403, the transverse horizontal rod corresponding to the mounting point of the outer facade wall connecting piece corresponding to the second wall connecting piece (9) is a second transverse horizontal rod (10), one end of the second transverse horizontal rod (10) is placed on the transverse plate (9-4), and a second pin (9-5) sequentially penetrates through the side plate (9-3) and the second transverse horizontal rod (10) to connect the second transverse horizontal rod (10) with the second wall connecting piece (9);
a second steel plate (9-1), a second anchor rod (9-2), two side plates (9-3), a transverse plate (9-4) and a second pin (9-5) form a second wall connecting piece (9);
step five, mounting a third wall connecting piece:
step 501, drilling a third installation hole vertical to the ground on an outer vertical face floor slab (20) of the existing building where an outer vertical face wall connecting piece installation point corresponding to a third wall connecting piece (11) is located, enabling one end of a third anchor rod (11-2) to penetrate through a third steel plate (11-1) to extend into the hole, and enabling the third anchor rod (11-2) to anchor the third steel plate (11-1) on the outer vertical face floor slab (20) of the existing building;
502, welding a vertical steel pipe (11-3) at the geometric center of a third steel plate (11-1);
503, the transverse horizontal rod corresponding to the outer facade wall connecting piece mounting point corresponding to the third wall connecting piece (11) is a third transverse horizontal rod (12), the third transverse horizontal rod (12) is arranged on the outer side wall of the vertical steel pipe (11-3), and a third pin (11-4) sequentially penetrates through the vertical steel pipe (11-3) and the third transverse horizontal rod (12) to fixedly connect the third transverse horizontal rod (12) with the third wall connecting piece (11);
a third steel plate (11-1), a third anchor rod (11-2), a vertical steel pipe (11-3) and a third pin (11-4) form a third wall connecting piece (11);
step six, mounting a fourth wall connecting piece:
601, enabling the transverse horizontal rod corresponding to the mounting point of the outer vertical wall connecting piece corresponding to the fourth wall connecting piece to be a fourth transverse horizontal rod (14), and enabling one end of the fourth transverse horizontal rod (14) to abut against the outer vertical surface (4) of the bottom layer of the existing building;
step 602, the fourth wall connecting piece comprises two opposite-pulling screw rods (13) which are respectively arranged at the upper side and the lower side of a fourth transverse horizontal rod (14), a fourth mounting hole is drilled on the outer vertical surface (4) of the bottom layer of the existing building where the outer vertical surface wall connecting piece mounting point corresponding to the fourth wall connecting piece is located, and one end of each of the two opposite-pulling screw rods (13) penetrates through the fourth mounting hole to be anchored in the outer vertical surface (4) of the bottom layer of the existing building;
step 603, the other ends of the two opposite pull screw rods (13) penetrate through the floor upright stanchions (1) corresponding to the outer vertical surface wall connecting piece mounting points corresponding to the fourth wall connecting piece, and the floor upright stanchions (1) are connected with the outer vertical surface (4) of the bottom layer of the existing building;
step seven, installing a fifth wall connecting piece:
701, drilling a fifth mounting hole in the overhanging structure bottom surface (6) of the existing building outer vertical surface where the outer vertical surface wall connecting piece mounting point corresponding to the fifth wall connecting piece (15) is located, enabling one end of a fourth anchor rod (15-2) to penetrate through a fourth steel plate (15-1) and extend into the fifth mounting hole, and enabling the fourth anchor rod (15-2) to anchor the fourth steel plate (15-1) on the overhanging structure bottom surface (6) of the existing building outer vertical surface;
702, welding two vertical plates (15-3) which are perpendicular to the fourth steel plate (15-1), perpendicular to the bottom surface (6) of the cantilever structure and parallel to each other on the fourth steel plate (15-1) along the position of the fourth steel plate (15-1) in geometric center symmetry;
703, connecting a fifth wall connecting piece (15) with a floor scaffold through an inclined rod (16), arranging one end of the inclined rod (16) between two fourth steel plates (15-1), sequentially penetrating the fourth steel plates (15-1) and the inclined rod (16) through a fourth pin (15-4) to connect the inclined rod (16) with the fifth wall connecting piece (15), and connecting the other end of the inclined rod (16) with the floor scaffold through a rotary fastener;
a fifth wall connecting piece (15) is formed by a fourth steel plate (15-1), a fourth anchor rod (15-2), two vertical plates (15-3) and a fourth pin nail (15-4);
step eight, construction of the cantilever scaffold:
801, determining the installation position of an anchoring installation foundation (17) of an overhanging scaffold by detecting the strength of an overhanging facade (5) of an existing building and the internal structure of the building, and building the anchoring installation foundation (17) at the installation position of the anchoring installation foundation (17) of the overhanging scaffold;
step 802, the scaffold that encorbelments on anchor installation basis (17) is under construction, the scaffold that encorbelments is including the pole (21) of encorbelmenting, vertical pole of sweeping the ground (22) of encorbelmenting and horizontal pole of sweeping the ground (23) of encorbelmenting, and the pole (21) of encorbelmenting, the connection mode of the vertical pole of sweeping the ground (22) of encorbelmenting and horizontal pole of sweeping the ground (23) of encorbelmenting is the same with the connection mode of the pole (1) of falling to the ground in the floor scaffold frame, vertical pole of sweeping the ground (2) and the horizontal pole of sweeping the ground (3).
2. The construction method of the scaffold for the reconstruction of the outer facade of the existing building according to claim 1, wherein: the height range of the existing building is 6-24 m.
3. The construction method of the scaffold for the reconstruction of the outer facade of the existing building according to claim 2, characterized in that: when the external elevation construction is carried out on the existing building with the height range of 24-50 m, the combined structure construction of a landing scaffold, an overhanging scaffold, a hanging frame and a hanging basket (18) is adopted; when the external elevation construction is carried out on the existing building with the height ranging from 50m to 100m, the combined structure construction of a hanging rack and a hanging basket (18) is adopted.
4. The construction method of the scaffold for the reconstruction of the outer facade of the existing building according to claim 1, wherein: the inclination of the overhanging structure bottom surface (6) of the existing building facade is more than 0 and less than infinity.
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