A cantilever self-stabilizing scaffold system for guta repair and a construction method thereof

Abstract

The present application relates to a kind of cantilever self-stabilizing scaffold system for repairing ancient tower, the ancient tower is the size gradually reducing layer by layer inward structure from bottom to top, the system includes: the bottom layer scaffold erected on foundation, composition includes vertical pole, horizontal pole and scissors support, longitudinal horizontal pole and transverse horizontal pole are set on vertical pole upper portion, horizontal scissors support extends to the edge of ancient tower, and multiple space trusses are used as the support of newly added vertical pole;Middle layer scaffold in the upper of bottom layer scaffold, vertical pole is all butt joint on the vertical pole of bottom layer scaffold, is equipped with longitudinal horizontal pole, transverse horizontal pole, scissors support and multiple space trusses;Top layer scaffold of outer diameter less than middle layer scaffold, surrounds the tower tip of ancient tower;Still include a kind of repairing construction method.The scaffold system and method of the present application are used for repairing construction of ancient tower, need not the help of the power of ancient tower to form stable self-stabilizing system, avoid additional damage to ancient tower, and the construction process is strong in pertinence, easy to operate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of construction engineering, in particular to a cantilever self-stabilizing scaffold system for repairing ancient towers and a construction method. BACKGROUND

[0002] Ancient towers have a long history, are high and large in size, and have many types, and are one of the carriers of China's 5,000-year civilization. The existing ancient tower structures are mostly built with bricks, wood, stone and other materials. Due to long-term exposure to the sun, wind and rain, and human damage, protective repair is needed. The repair of the outer facade of the ancient tower requires the erection of a scaffold, and because of the different shapes, structures and heights of the ancient tower, and the protection of the main structure of the ancient tower, the conventional method of erecting a scaffold by establishing a tie point with the main structure cannot be used in the repair of the ancient tower.

[0003] In the prior art, Chinese invention patent CN102337784B discloses a high curved tower building steel formwork construction method, which is used for building a steel formwork for a high curved tower, and specifically includes the steps of installing a cantilever connecting piece, welding a large formwork limiting device, first installing and positioning the large formwork, connecting and fixing the inner and outer formworks, removing the large formwork, lifting the large formwork, and converting the pitch state of the large formwork. Through the unique construction process, the purpose of easy and safe operation is achieved. However, the above construction method is used for the new construction of tower buildings and cannot be installed and used for the repair construction of ancient towers. Moreover, it does not specifically adopt the design of an inner cantilever, and cannot perform repair operations on the tower surface from the inside. In addition, based on its structural characteristics and construction method, it can only be combined with a high curved tower to build and construct, and cannot form a self-stabilizing structure, nor can it design a cantilever structure that matches the outer curved surface of the tower on the inside. Therefore, we must develop a new cantilever self-stabilizing scaffold system for repairing ancient towers based on the actual needs of ancient tower repair, and design a special construction method for the erection of the scaffold system to achieve the purposes of applicability, safety, stability and convenience. SUMMARY

[0004] The purpose of the present application is to overcome the deficiencies in the prior art, and to provide a cantilever self-stabilizing scaffold system for repairing ancient towers and a construction method. The scaffold system and method of the present application are designed and constructed for the repair construction of ancient towers, facilitating repair operations on the ancient tower from the inside of the scaffold, closely following the ancient tower contour during repair, and forming a stable self-stabilizing system, which can be stabilized without relying on the force of the ancient tower, avoiding additional damage to the ancient tower, and being highly targeted and easy to operate during construction.

[0005] In order to achieve the above-mentioned purposes, the technical solutions provided by the present application are as follows:

[0006] A kind of cantilevered self-stabilizing scaffold system for repairing ancient tower, the ancient tower is the structure of layer by layer inwardly, the size of the ancient tower is gradually reduced from bottom to top, and the outline of the ancient tower is octagonal, the system comprises:

[0007] The bottom scaffold is erected on the treated foundation, and is composed of vertical rods, horizontal rods and scissors supports, longitudinal horizontal rods and transverse horizontal rods are arranged on the upper part of the vertical rods, the transverse horizontal rods are arranged below the longitudinal horizontal rods and are fixed on the vertical rods by right-angle fasteners, horizontal scissors supports are arranged through the outermost circle of the scaffold and extend to the edge of the ancient tower, a row of vertical scissors supports are continuously arranged from the end of the scaffold, the steel pipes of the vertical scissors supports form an angle of 45-60 degrees with the ground, and are continuously arranged from bottom to top and left to right, and form a zigzag structure with the horizontal scissors supports arranged at each corner of the inner side vertical surface, and a plurality of space trusses are arranged to support the newly added vertical rods on the inner side, the newly added vertical rods gradually shrink towards the ancient tower, scaffold boards are arranged on each horizontal rod, and safety nets are hung on the periphery of the scaffold.

[0008] The middle scaffold has a smaller outer diameter than the bottom scaffold and is arranged above the bottom scaffold, the vertical rods in the middle scaffold are all connected to the vertical rods in the inner layer of the bottom scaffold, longitudinal horizontal rods and transverse horizontal rods are arranged on the upper part of the vertical rods, the transverse horizontal rods are arranged below the longitudinal horizontal rods and are fixed on the vertical rods by right-angle fasteners, horizontal scissors supports are arranged through the outermost circle of the scaffold and extend to the edge of the ancient tower, vertical scissors supports are arranged to form a zigzag structure with the horizontal scissors supports, a plurality of space trusses are arranged to support the newly added vertical rods on the inner side, the newly added vertical rods gradually shrink towards the ancient tower, scaffold boards are arranged on each horizontal rod, and safety nets are hung on the periphery of the scaffold.

[0009] The top scaffold has a smaller outer diameter than the middle scaffold and is arranged above the middle scaffold, the vertical rods in the top scaffold are all connected to the vertical rods in the inner layer of the middle scaffold, longitudinal horizontal rods and transverse horizontal rods are arranged on the upper part of the vertical rods, the transverse horizontal rods are arranged below the longitudinal horizontal rods and are fixed on the vertical rods by right-angle fasteners, the top scaffold surrounds the top of the ancient tower, scaffold boards are arranged on each horizontal rod, and safety nets are hung on the periphery of the scaffold.

[0010] In the cantilevered self-stabilizing scaffold system for repairing ancient tower, the foundation treatment is to remove the brick paving and transplant seedlings around the ancient tower, pour reinforced concrete or strip foundation in the scaffold erection range, and lay a continuous channel steel on the ground as a backing plate.

[0011] In the cantilever self-stabilizing scaffold system for repairing ancient towers, two adjacent vertical rods are connected to form a lengthened vertical rod, the vertical rod joints are staggered, and the joints of two adjacent vertical rods are not arranged in the same step.

[0012] In the cantilever self-stabilizing scaffold system for repairing ancient towers, the shape of the scaffold system is determined according to the geometric shape of the vertical projection of the ancient tower, and is quadrilateral, hexagonal or octagonal.

[0013] In the cantilever self-stabilizing scaffold system for repairing ancient towers, the scaffold plate is a rectangular steel bamboo screen arranged on four longitudinal horizontal rods, and the scaffold plate is laid by butt joint or lap joint, and the scaffold plates in two directions at the corners are overlapped to avoid the probe or gap.

[0014] The application also provides a construction method for repairing ancient towers by using the above scaffold system, which comprises the following steps:

[0015] Firstly, monitoring points are arranged on the vertical bearing members or the floor around the ancient tower to monitor in real time during construction.

[0016] Secondly, the scaffold foundation is treated, and the foundation treatment is to remove the brick paving and transplant seedlings around the ancient tower, and to pour reinforced concrete or strip foundation within the scaffold erection range.

[0017] Thirdly, the vertical rods are erected, and a plurality of vertical rods are arranged around the bottom of the ancient tower to form a multi-layer ring structure around the shape of the ancient tower, and the positions of all the first vertical rods of the bottom layer are positioned and laid out during arrangement, and the lengthened vertical rods are connected by butt joint fasteners.

[0018] Fourthly, the horizontal rods and scissors are erected, and after the vertical rods are arranged, longitudinal and transverse horizontal rods are arranged on the upper part of the vertical rods, the transverse horizontal rods are arranged below the longitudinal horizontal rods and are fixed on the vertical rods by right-angle fasteners, the horizontal rods are arranged on the vertical rods to form a plurality of rings around the ancient tower, horizontal scissors are arranged on the outermost ring of the scaffold, the horizontal scissors penetrating the horizontal scissors are arranged to extend to the edge of the ancient tower as a construction platform, a row of vertical scissors is arranged continuously from the end of the scaffold, the steel pipes of the vertical scissors are arranged at an angle of 45-60 degrees with the ground, and are arranged continuously from left to right and from bottom to top, and a horizontal scissors in the shape of Chinese character 'z' is arranged at each corner of the inner side surface.

[0019] The fifth step is to set up a truss system. Space trusses are set up at different heights to form a truss system. The space trusses extend to the outermost circle of the scaffold at both ends. The inner side of the space trusses is used to suspend the uppermost layer of the inner circle of the scaffold. The vertical rods of the inner and outer scaffolds are connected horizontally. Multiple inclined rods are arranged below the space trusses to transfer the weight of the vertical rods of the cantilevered scaffold.

[0020] The sixth step is to set up a scaffold board and a safety net. Steel bamboo screens are used as scaffold boards. Each scaffold board is arranged on four longitudinal horizontal rods. The scaffold boards are arranged by butt joint or lap joint. A knot-free fire-retardant safety net is hung on the periphery of the scaffold. The cantilevered self-stabilizing scaffold system is used to repair the ancient tower layer by layer.

[0021] The seventh step is to remove the scaffold system after the completion of the repair of the ancient tower.

[0022] Further, in the first step, during the construction process, the inclination detection is performed by using an inclinometer to detect the inclination of the tower body in real time. The data collection frequency is one hour. The settlement detection frequency is twice a week during the scaffold erection, once a week during the repair construction, and once every three months after the completion. When the detection data reaches the alarm threshold, an alarm is given in time.

[0023] Further, in the third step, the horizontal distance of the vertical rods of the scaffold is 1.2 meters, the horizontal distance is 1.8 meters, and the vertical distance is 1.2 meters. The longitudinal horizontal rods and the transverse horizontal rods are arranged at a distance of 200 mm above the base.

[0024] Further, in the fifth step, the completed scaffold system is designed as a layered cake from bottom to top, and has an inner cavity to cover the ancient tower. The structure is divided into a bottom scaffold, a middle scaffold, and a top scaffold. The projection profiles of the bottom scaffold, the middle scaffold, and the top scaffold are the same as the profile shape of the ancient tower. The bottom scaffold is arranged on the treated foundation. The outer diameter of the middle scaffold is smaller than that of the bottom scaffold and is arranged above the bottom scaffold. The outer diameter of the top scaffold is smaller than that of the middle scaffold and is arranged above the middle scaffold.

[0025] Further, in the fifth step, the completed scaffold system comprises the columns, longitudinal horizontal rods, transverse horizontal rods, scissors and space trusses, a plurality of the columns are arranged around the ancient tower, the height extension adopts the form of butt joint columns, the longitudinal horizontal rods and the transverse horizontal rods are connected to the columns to form a layered structure, the columns and the horizontal rods form a scaffold frame, a plurality of space trusses are arranged in the scaffold frame, the scissors pass through each layer of structure to connect the inner and outer rings, the inner ring extends to the edge of the ancient tower to form an operation platform, the inner side of the scaffold frame is provided with new columns from the bottom to the upper part layer by layer, the bottom of the new column is placed on the space truss, the new column extends inward layer by layer, and the operation platform close to the ancient tower is formed through the scissors, and the inside of the scaffold system forms a cavity covering the outer contour of the ancient tower and performing repair operation.

[0026] Based on the above technical scheme, the cantilever self-stabilizing scaffold system and the construction method of the present application have the following technical effects in the repair of the ancient tower:

[0027] 1. The scaffold system of the present application is designed based on the actual situation of the repair of the ancient tower, so that the surface of the ancient tower is not contacted, and a construction operation platform is designed close to the edge of the ancient tower, which is convenient for the repair operation of the ancient tower. Compared with the prior art, the scaffold system close to but not contacting improves the safety of the repair of the ancient tower, assists the inclination and settlement monitoring of the construction, improves the safety of the construction, avoids damage to the ancient tower during repair, and provides a construction template for the repair of various ancient towers.

[0028] 2. The scaffold system of the present application adopts a cantilever self-stabilizing structure design, the three-dimensional modeling is realized, the stress analysis is carried out, and the overall stability is judged, the structure adopts a three-layer cake form of the bottom scaffold, the middle scaffold and the top scaffold, the size is reduced layer by layer, the stable frame structure is formed through the design of the columns, horizontal columns and scissors, in order to realize that the inside construction cavity covers the contour of the ancient tower, the space truss is designed to support the newly added columns on the inside, so that the construction platform is close to the ancient tower, the cantilever structure extends to the edge of the ancient tower from the bottom to the top layer by layer, and the self-stabilizing structure is formed through the design of the outside scissors.

[0029] 3. The construction method of the present application is made based on the structural characteristics of the repair of the ancient tower, starting from the safety requirements of the scaffold system, such as the erection form, the erection area, the anti-overturning ability of the scaffold, the foundation bearing capacity, the stability of the column, the deflection of the horizontal rod and the strength of the column, and gradually realizing stable construction, which has the characteristics of strong pertinence, convenient operation and high construction safety. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a sectional view of a cantilever self-stabilizing scaffold system for repairing an ancient tower.

[0031] Figure 2 is a top view of a cantilever self-stabilizing scaffold system for repairing ancient towers according to the present application.

[0032] Figure 3 is a flowchart of a construction method for repairing ancient towers using a scaffold system according to the present application.

[0033] wherein,

[0034] 1 - ancient tower 2 - vertical pole 3 - horizontal pole 31 - longitudinal horizontal pole 32 - transverse horizontal pole 4 - scissor brace 41 - horizontal scissor brace 42 - vertical scissor brace 5 - space truss DETAILED DESCRIPTION

[0035] The present application will be further described in detail below in conjunction with the accompanying drawings and specific examples, so that its structural composition and construction flow can be more clearly and thoroughly understood, but the protection scope of the present application should not be limited thereby.

[0036] As shown in Figure 1 and Figure 2 , the present application is a cantilever self-stabilizing scaffold system for repairing ancient towers, the ancient tower 1 is a layer-by-layer inward structure with the size gradually decreasing from bottom to top, the outer shape of the ancient tower is octagonal, and there are also quadrangular or hexagonal shapes. However, they are all inward structures with the size gradually decreasing from bottom to top. The cantilever self-stabilizing scaffold system comprises:

[0037] The bottom scaffold A is erected on the treated foundation, the foundation treatment is to remove the brick paving and transplant seedlings around the ancient tower, and to pour reinforced concrete or strip foundation within the scaffold erection range, and to lay a continuous channel steel as a cushion plate on the ground surface, the structural composition comprises a vertical pole 2, a horizontal pole 3 and a scissor brace 4, a longitudinal horizontal pole 31 and a transverse horizontal pole 32 are arranged on the upper part of the vertical pole 2, the transverse horizontal pole 32 is arranged below the longitudinal horizontal pole 31 and is fixed on the vertical pole 1 by a right-angle fastener, a horizontal scissor brace 41 is arranged through the outermost circle of the scaffold and extends to the edge of the ancient tower, and an inclined brace is arranged near the ancient tower to provide stability for the platform formed thereby. A row of vertical scissor braces 42 are continuously arranged from the end of the scaffold, the steel pipes of the vertical scissor braces 42 form an angle of 45-60 degrees with the ground, are continuously arranged from left to right and upward, and form a "Z" shape structure with the horizontal scissor braces 41 arranged at each corner of the inner side surface, and a plurality of space trusses 5 are arranged to support the newly added vertical poles on the inner side, the newly added vertical poles gradually inwardly shrink towards the ancient tower 1, a scaffold board is arranged on each horizontal pole 3, and a safety net is hung on the periphery of the scaffold;

[0038] The middle layer scaffold B has an outer diameter smaller than the bottom layer scaffold and is above the bottom layer scaffold, the vertical rods 2 in the middle layer scaffold are all connected to the vertical rods 2 in the inner layer of the bottom layer scaffold, longitudinal horizontal rods 31 and transverse horizontal rods 32 are arranged on the upper part of the vertical rods 2, the transverse horizontal rods 32 are arranged below the longitudinal horizontal rods 31 and are fixed on the vertical rods 2 by means of right-angle fasteners, horizontal scissors supports are arranged through the outermost circle of the scaffold and extend to the edge of the ancient tower, vertical scissors supports are arranged to form a zigzag structure with the horizontal scissors supports, and a plurality of space trusses are arranged to support the newly-added vertical rods on the inner side, the newly-added vertical rods are gradually inwardly retracted towards the ancient tower, scaffold boards are arranged on each layer of horizontal rods, and safety nets are hung on the periphery of the scaffold.

[0039] The top layer scaffold C has an outer diameter smaller than the middle layer scaffold and is above the middle layer scaffold, the vertical rods 2 in the top layer scaffold are all connected to the vertical rods 2 in the inner layer of the middle layer scaffold, longitudinal horizontal rods 31 and transverse horizontal rods 32 are arranged on the upper part of the vertical rods 2, the transverse horizontal rods 32 are arranged below the longitudinal horizontal rods 31 and are fixed on the vertical rods 2 by means of right-angle fasteners, the top layer scaffold surrounds the tower tip of the ancient tower 1, scaffold boards are arranged on each layer of horizontal rods, and safety nets are hung on the periphery of the scaffold.

[0040] In the application, two adjacent vertical rods are connected to form a lengthened vertical rod, the vertical rod joints are arranged staggeredly, and the joints of two adjacent vertical rods are not arranged in the same step, and the joints of the vertical rods in the same step are staggered by a distance greater than 500 mm in the height direction.

[0041] In practice, the shape of the scaffold system is determined according to the geometric shape of the vertical projection of the ancient tower, and is a quadrilateral, a hexagon or an octagon.

[0042] In practice, the scaffold board is a rectangular steel bamboo lattice, which is arranged on four longitudinal horizontal rods, the scaffold board is arranged by butt joint or lap joint, and the scaffold boards in two directions at the corner are overlapped to avoid the probe or gap, and the safety net is hung on the periphery of the scaffold, and the lower end of the safety net is firmly bound with each row of steel bamboo lattices without gap.

[0043] The scaffold system of the application adopts a cantilever self-stabilizing structure design, the three-dimensional modeling is realized, the stress analysis is carried out, and the overall stability is judged, the three-layer cake form of the bottom layer scaffold, the middle layer scaffold and the top layer scaffold is adopted on the structure, the size is gradually reduced, the vertical column, the horizontal column and the scissors support are designed to form a stable frame structure, in order to realize the cavity construction on the inner side covering the ancient tower contour, the space truss is designed to support the newly-added vertical column on the inner side, so that the construction platform is close to the ancient tower, the cantilever structure extending from the bottom to the top layer by layer inwardly extends to the edge of the ancient tower, and the self-stabilizing structure is formed by the design of the outer scissors support.

[0044] The scaffold system of the present application is based on the actual situation of the repair of the ancient tower, and is designed to not contact the surface of the ancient tower and to design a construction operation platform near the edge of the ancient tower, so as to facilitate the repair operation of the ancient tower. Compared with the prior art, the scaffold system close to but not contacting the ancient tower improves the safety of the repair of the ancient tower, assists the inclination and settlement monitoring of the construction, improves the safety of the construction, avoids damage to the ancient tower during the repair, and provides a construction template for the repair of various ancient towers.

[0045] The present application also provides a construction method for repairing an ancient tower by using the above scaffold system, which comprises the following steps:

[0046] Firstly, monitoring points are arranged on the vertical load-bearing members or the floor around the ancient tower to monitor in real time during construction; during regular detection during construction, the inclination detection is used to detect the inclination change of the tower body in real time by using an inclinometer, the data acquisition frequency is one hour, the settlement detection frequency is two times per week during the erection of the scaffold, one time per week during the repair construction, and one time every three months after completion, and timely alarm is given when the detection data reaches the alarm threshold.

[0047] Secondly, the foundation of the scaffold is treated, and the foundation treatment is to remove the brick paving and transplant seedlings around the ancient tower, and to pour reinforced concrete or strip foundation within the erection range of the scaffold;

[0048] Thirdly, the vertical rods are erected, a plurality of vertical rods are arranged around the bottom of the ancient tower, the plurality of vertical rods form a multi-layer ring structure around the shape of the ancient tower, the positions of all the first vertical rods of the bottom layer are positioned and laid out during arrangement, and the lengthened vertical rods are connected by using butt joint fasteners; in practice, the horizontal distance of the vertical rods of the scaffold is 1.2 meters, the arrangement distance is 1.8 meters, and the vertical distance is 1.2 meters, and the vertical and horizontal rods are arranged at a distance of 200 mm above the base.

[0049] Fourthly, the horizontal rods and scissors supports are erected, after the arrangement of the vertical rods is completed, the vertical and horizontal rods are arranged on the upper part of the vertical rods, the horizontal rods are arranged below the vertical rods and are fixed on the vertical rods by using right-angle fasteners, the horizontal rods are arranged to form a plurality of rings around the ancient tower, the horizontal scissors supports are arranged on the outermost ring of the scaffold, the horizontal scissors supports penetrating the horizontal scissors supports are arranged to extend to the edge of the ancient tower as a construction platform, a row of vertical scissors supports are continuously arranged from the end of the scaffold, the steel pipes of the vertical scissors supports form an angle of 45-60 degrees with the ground, are arranged from bottom to top and left to right, and a horizontal scissors support in the shape of Chinese character 'z' is arranged at each corner of the inner side surface.

[0050] The fifth step is to set up the truss system. Space trusses are set up at different heights to form a truss system. The two ends of the space trusses extend to the outermost circle of the scaffold. The inner side of the space trusses is used to suspend the uppermost layer of the inner circle of the scaffold. The vertical rods of the inner and outer scaffolds are connected horizontally. Multiple inclined rods are arranged below the space trusses to transfer the weight of the suspended scaffold vertical rods. The completed scaffold system is designed like a layered cake from bottom to top and has an inner cavity to cover the ancient tower. The structure is divided into a bottom scaffold, a middle scaffold, and a top scaffold. The projection profiles of the bottom scaffold, the middle scaffold, and the top scaffold are the same as the profile of the ancient tower. The bottom scaffold is set up on the treated foundation. The outer diameter of the middle scaffold is smaller than that of the bottom scaffold and is above the bottom scaffold. The outer diameter of the top scaffold is smaller than that of the middle scaffold and is above the middle scaffold. The completed scaffold system includes vertical rods, longitudinal horizontal rods, transverse horizontal rods, scissors supports, and space trusses. Multiple vertical rods are arranged around the ancient tower. The height extension adopts a butt joint vertical rod form. The longitudinal horizontal rods and the transverse horizontal rods are connected to the vertical rods to form a layered structure. The vertical rods and the horizontal rods form a scaffold frame. Multiple space trusses are arranged in the scaffold frame. Scissors supports penetrate each layer of structure to connect the inner and outer circles. The inner circle extends to the edge of the ancient tower to form an operation platform. New vertical rods are arranged layer by layer from the bottom to the top on the inner side of the scaffold frame. The bottom of the new vertical rods is placed on the space trusses. The new vertical rods are arranged layer by layer inward and form an operation platform close to the ancient tower through the scissors supports. An inner cavity is formed inside the scaffold system to cover the outer profile of the ancient tower and perform repair operations.

[0051] The sixth step is to set up scaffold boards and safety nets. Steel bamboo screens are used as scaffold boards. Each scaffold board is arranged on four longitudinal horizontal rods and is laid in a butt joint or overlapping manner. Non-knot fire-retardant safety nets are hung on the periphery of the scaffold. The completed suspended self-stabilizing scaffold system is used to perform layer-by-layer repair on the ancient tower. The scaffold boards are 95*130cm and 80*100cm steel bamboo screens and are arranged on four longitudinal horizontal rods. The scaffold boards are laid in a butt joint or overlapping manner. The scaffold boards in two directions at the corners should be overlapped to avoid the appearance of a probe and an empty stop. Non-knot fire-retardant safety nets are hung on the periphery of the scaffold. Galvanized iron wire and steel pipes are tightly tied. The lower end and each row of steel screens are tightly tied without gaps to prevent objects from falling and injuring people.

[0052] In the seventh step, after the entire GuTa is completely repaired, the scaffold system is dismantled according to the principle of "first erecting and then dismantling, and first dismantling and then erecting". Before the scaffold is dismantled, it is confirmed that the maintenance and repair of the GuTa have been completed, and the quality has been accepted. Hidden troubles are timely rectified and repaired, and then the dismantling work is implemented. Before the scaffold is dismantled, the safety, technology and external decoration protection measures of the scaffold construction responsible person are handed over, and the sundries on the scaffold and the ground obstacles are removed. The dismantling work must be carried out from top to bottom layer by layer. The scaffold steel pipes dismantled are timely transported to the ground by using the crane, and it is strictly prohibited to stack the steel pipes in the same position at the same layer with overload. When the longitudinal horizontal rods and scissors supports are dismantled, the middle buckle is first dismantled, and then the two end buckles are dismantled. The buckles and the pipes should be separated, and the rods with the buckles are not allowed to be transported to the ground. When the scaffold is dismantled, it is strictly prohibited to throw the accessories downward, and the accessories should be hoisted to the ground by using the crane. The accessories transported to the ground should be neatly stacked according to the specifications and varieties.

[0053] The construction method of the application is made based on the structural characteristics of the GuTa repair, and starts from the safety requirements of the scaffold system, such as the erecting form, erecting area, scaffold overturning resistance, foundation bearing capacity, vertical rod stability, horizontal rod deflection and vertical rod strength, and gradually realizes stable construction, which has the characteristics of strong pertinence, convenient operation and high construction safety.

Claims

1. A cantilever self-stabilizing scaffold system for repairing a pagoda, the pagoda being a layer-by-layer inwardly-receding structure with sizes gradually decreasing from bottom to top, and the pagoda having an octagonal outer contour, characterized in that, The system comprises: The bottom layer scaffold is erected on the treated foundation and comprises vertical poles, horizontal poles and scissors braces, longitudinal horizontal poles and transverse horizontal poles are arranged on the upper part of the vertical poles, the transverse horizontal poles are arranged below the longitudinal horizontal poles and are fixed on the vertical poles by means of right-angle fasteners, horizontal scissors braces are arranged through the outermost circle and the innermost circle of the scaffold and extend to the edge of the ancient tower, a row of vertical scissors braces is continuously arranged from the end of the scaffold, the steel pipes of the vertical scissors braces form an angle of 45-60 degrees with the ground, are continuously arranged from bottom to top and left to right, and form a zigzag structure with the horizontal scissors braces arranged at each corner of the inner side surface, a plurality of space trusses are arranged to support the newly-added vertical poles on the inner side, the newly-added vertical poles are gradually inwardly retracted towards the ancient tower, scaffold boards are arranged on each horizontal pole, and a safety net is hung on the periphery of the scaffold; The middle layer scaffold has a smaller outer diameter than the bottom layer scaffold and is arranged above the bottom layer scaffold, the vertical poles in the middle layer scaffold are all connected to the vertical poles in the inner layer of the bottom layer scaffold, longitudinal horizontal poles and transverse horizontal poles are arranged on the upper part of the vertical poles, the transverse horizontal poles are arranged below the longitudinal horizontal poles and are fixed on the vertical poles by means of right-angle fasteners, horizontal scissors braces are arranged through the outermost circle and the innermost circle of the scaffold and extend to the edge of the ancient tower, the vertical scissors braces form a zigzag structure with the horizontal scissors braces, a plurality of space trusses are arranged to support the newly-added vertical poles on the inner side, the newly-added vertical poles are gradually inwardly retracted towards the ancient tower, scaffold boards are arranged on each horizontal pole, and a safety net is hung on the periphery of the scaffold; The top layer scaffold has a smaller outer diameter than the middle layer scaffold and is arranged above the middle layer scaffold, the vertical poles in the top layer scaffold are all connected to the vertical poles in the inner layer of the middle layer scaffold, longitudinal horizontal poles and transverse horizontal poles are arranged on the upper part of the vertical poles, the transverse horizontal poles are arranged below the longitudinal horizontal poles and are fixed on the vertical poles by means of right-angle fasteners, the top layer scaffold surrounds the tower top of the ancient tower, scaffold boards are arranged on each horizontal pole, and a safety net is hung on the periphery of the scaffold; The bottom layer scaffold, the middle layer scaffold and the top layer scaffold are all independent of the stress of the ancient tower structure.

2. A cantilevered self-stabilizing scaffolding system for use in the restoration of a guta according to claim 1, characterized in that, The foundation treatment is to remove the brick paving and transplant seedlings around the ancient tower, to pour reinforced concrete or to pour a strip foundation in the scaffold erection range, and to lay a long channel steel on the ground as a cushion plate.

3. The cantilevered self-stabilizing scaffolding system for guta repair of claim 1, wherein, Two adjacent vertical poles are connected to form a lengthened vertical pole, the vertical pole joints are staggered, and the joints of two adjacent vertical poles are not arranged in the same step, and the joints of the vertical poles in the same step are staggered in the height direction by more than 500 mm.

4. The cantilevered self-stabilizing scaffolding system for guta repair of claim 1, wherein, The shape of the scaffold system is determined according to the geometric shape of the vertical projection of the ancient tower, and is quadrilateral, hexagonal or octagonal.

5. The cantilevered self-stabilizing scaffolding system for guta repair of claim 1, wherein, The scaffold board is a rectangular steel bamboo lattice arranged on four longitudinal horizontal poles, the scaffold board is laid by butt joint or lap joint, and the scaffold boards in two directions at the corners are overlapped to avoid a probe or a gap, and the safety net is hung on the periphery of the scaffold, the lower end of the safety net is firmly bound with each row of steel bamboo lattices without leaving a gap.

6. A construction method for repairing a pagoda using the scaffold system according to any one of claims 1 to 5, characterized in that, The construction method comprises the following steps: The first step is to set up monitoring points. In the construction process, the inclination and settlement of the monitoring points arranged on the vertical load-bearing members or the floor around the pagoda are monitored in real time. The second step is to process the scaffold foundation. The brick paving and transplanted saplings around the pagoda are removed, and the steel mesh concrete or strip foundation is poured within the scaffold erection range. The third step is to erect vertical poles. A plurality of vertical poles are arranged around the bottom of the pagoda. The plurality of vertical poles form a multi-layer ring structure around the shape of the pagoda. The positions of all the first vertical poles on the bottom layer are positioned and laid out. The extended vertical poles are connected by butt joint fasteners. The fourth step is to erect horizontal poles and scissors. After the vertical poles are arranged, longitudinal and transverse horizontal poles are arranged on the upper part of the vertical poles. The transverse horizontal poles are arranged below the longitudinal horizontal poles and are fixed on the vertical poles by right-angle fasteners. The horizontal poles are arranged on the vertical poles to form a plurality of rings around the pagoda. Horizontal scissors are arranged on the outermost ring of the scaffold. The horizontal scissors that penetrate through the edge of the pagoda are used as a construction platform. A row of vertical scissors is continuously arranged from the end of the scaffold, forming a 45-60 degree angle between the steel pipes of the vertical scissors and the ground. The vertical scissors are continuously arranged from bottom to top and left to right. A "Z" shaped horizontal scissors is arranged at each corner of the inner side surface. The fifth step is to erect a truss system. Space trusses are arranged at different heights to form a truss system. The two ends of the space trusses extend to the outermost ring of the scaffold. The inner side of the space trusses is used to suspend the uppermost layer of the inner ring of the scaffold. The transverse tie rods connect the inner and outer scaffold vertical poles. A plurality of inclined poles are arranged below the space trusses to transfer the weight of the suspended scaffold vertical poles. The sixth step is to erect scaffold boards and safety nets. Steel bamboo is used as a scaffold board. Each scaffold board is arranged on four longitudinal horizontal poles. The scaffold boards are arranged by butt joint or lap joint. Non-knot fireproof safety nets are hung on the periphery of the scaffold. The suspended self-stabilizing scaffold system is used to repair the pagoda layer by layer. The seventh step is to remove the scaffold system after the pagoda is completely repaired according to the principle of "erecting first and removing later, and erecting later and removing first".

7. The construction method of guta restoration according to claim 6, wherein, In the first step, the inclination is detected by using an inclinometer to detect the inclination of the pagoda in real time. The data collection frequency is one hour. The settlement detection frequency is twice a week during the erection of the scaffold, once a week during the repair construction, and once every three months after the completion. When the detection data reaches the alarm threshold, an alarm is given in time.

8. The construction method of guta restoration as claimed in claim 6 wherein, In the third step, the horizontal distance of the vertical poles of the scaffold is 1.2 meters, the arrangement distance is 1.8 meters, and the vertical distance is 1.2 meters. The longitudinal and transverse horizontal poles are arranged 200 mm above the bottom.

9. The construction method of guta restoration as claimed in claim 6 wherein, In the fifth step, the completed scaffold system is designed as a layered cake from bottom to top, which is divided into a bottom layer, a middle layer, and a top layer. The projection profiles of the bottom layer, the middle layer, and the top layer are the same as the profile of the pagoda. The bottom layer is arranged on the processed foundation. The outer diameter of the middle layer is smaller than that of the bottom layer and is arranged above the bottom layer. The outer diameter of the top layer is smaller than that of the middle layer and is arranged above the middle layer.

10. The construction method for gutta-percha repair according to claim 9, wherein, In the fifth step, the scaffold system comprises upright columns, longitudinal horizontal rods, transverse horizontal rods, scissors and space trusses. A plurality of the upright columns are arranged around the ancient tower. The height extension adopts a form of butt joint columns. The longitudinal horizontal rods and the transverse horizontal rods are connected to the upright columns to form a layered structure. The upright columns and the horizontal rods form a scaffold frame. A plurality of space trusses are arranged in the scaffold frame. The scissors pass through each layer of structure to connect the inner and outer rings. The inner ring extends to the edge of the ancient tower to form an operation platform. New upright columns are arranged on the inner side of the scaffold frame layer by layer from the bottom to the top. The bottom of the new upright column is placed on the space truss.

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