CN113719092A

CN113719092A - Large-scale demonstration screen fixing structure adopting light high-strength steel and mounting and dismounting method

Info

Publication number: CN113719092A
Application number: CN202111136987.6A
Authority: CN
Inventors: 周予启; 任耀辉; 谢飞飞; 范昕; 贾学敏; 曹雨奇; 伍秀华; 田小东
Original assignee: China Construction First Group Construction and Development Co Ltd
Current assignee: China Construction First Group Construction and Development Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2021-11-30

Abstract

The invention relates to the technical field of light high-strength steel materials, in particular to an ultralong and ultralarge arc-shaped demonstration screen fixing structure built by adopting light high-strength steel, which comprises an ultralong and ultralarge arc-shaped demonstration screen fixing structure quickly mounted and dismounted on a hardened natural ground, wherein a building frame body of the fixing structure is formed by integrating a steel pipe matched with a disc buckling frame and a socket type disc buckling frame, the steel pipe matched with the disc buckling frame and the socket type disc buckling frame are integrated and comprise an adjusting seat, a standard base, a first layer cross rod and a flat main frame, the steel pipe matched with the disc buckling frame and the socket type disc buckling frame also comprise a second layer cross rod, a first layer inclined rod, a third layer cross rod, a second layer inclined rod, a main frame, a fourth layer cross rod, a third layer inclined rod and a U-shaped adjusting seat A great event stage with high security level is difficult to build, and the maximum displacement of the top of the monitoring structure is 19 mm.

Description

Large-scale demonstration screen fixing structure adopting light high-strength steel and mounting and dismounting method

Technical Field

The invention relates to the technical field of light high-strength steel materials, in particular to a fixing structure and an installing and detaching method of an ultralong and overlarge arc demonstration screen built by adopting the light high-strength steel materials.

Background

The arrangement of major movable stages is generally large in size and needs to be quickly set up and completed in a short time; after the activity is finished, the movable wall is required to be quickly dismantled, and the selected materials and structural systems can be quickly installed and dismantled in a short time. The invention provides a 174m ultralong and overlarge arc demonstration screen structure and a special node structure which can be quickly assembled and disassembled in a short time.

Disclosure of Invention

The invention aims to provide an overlong and overlarge arc-shaped demonstration screen fixing structure built by adopting a light high-strength steel material, which comprises an overlong and overlarge arc-shaped demonstration screen fixing structure which is quickly mounted and dismounted on a hardened natural ground, wherein a building frame body of the fixing structure consists of a steel pipe matched with a disc buckle frame and a socket type disc buckle frame, and the socket type disc buckle frame structure comprises an adjusting seat, a standard base, a first layer of cross rod and a flat main frame;

the adjusting seat can be arranged at the arrangement position of the fixed point;

the main frame sleeve part is sleeved above the adjusting seat upwards, and the lower edge of the standard base is completely arranged in the groove of the wrench-in stress plane;

the first layer of cross rod is sleeved in the position of the small hole of the disc, so that the front end of the cross rod head is propped against the main frame circular tube, and then the cross rod head penetrates through the small hole by a wedge to be fastened and fixed;

the long end of the flat main frame is inserted into a sleeve of the standard base. Wherein the flat body frame only uses at first layer overlap joint, and the second floor all uses the body frame up.

Optionally, the length of the frame body of the fixing structure is between 160 and 180m, the width is between 20 and 26m, and the height is between 36 and 45m, and the position of the frame body on the back surface where no screen is hung is set to be a step type.

Optionally, fixed knot structure's arc support body is formed by connecting the module support body, arc support body side direction down tube is full of cloth, and 2 are arranged to every module of positive down tube, adopts the steel pipe to carry out the drawknot between the module.

Optionally, the horizontal bridging 4.5m of the frame body of the fixed structure is one, the vertical bridging is additionally arranged on the side face of the middle part of the frame body, the three steps and the two spans of the bridging are arranged, each span is arranged, and the two rows of steel pipe bridging are arranged in the front and the back of the bottom of the frame body and are used for tying.

Optionally, 4 boarding streets are arranged in the middle of the frame body of the fixing structure, and section steel underpinning is adopted at a street entrance.

Optionally, the bottom cable channel of the fixed structure is underpinned by using profile steel and a cover plate.

Optionally, the steel pipe for matching the disc buckling frame and the socket type disc buckling frame integrally comprise a second layer of cross rod, a first layer of inclined rod, a third layer of cross rod, a second layer of inclined rod, a main frame, a fourth layer of cross rod, a third layer of inclined rod and a U-shaped adjusting seat, the second layer of cross rod, the third layer of cross rod and the fourth layer of cross rod are respectively laid in the horizontal directions of different heights of the fixing structure, the first layer of inclined rod, the second layer of inclined rod and the third layer of inclined rod are respectively and obliquely laid on different height positions of the fixing structure, the main frame is formed by combining the first layer of inclined rod and the second layer of inclined rod with the first layer of cross rod, the second layer of cross rod and the third layer of cross rod, and the U-shaped adjusting seat is fixedly installed at the top position of a pipeline of the main frame

Optionally, a plurality of balancing weights are arranged at the lower side of the frame body of the fixing structure.

The fixing structure of the ultralong and ultralarge arc-shaped demonstration screen and the mounting and dismounting method specifically comprise the following steps,

s1: after setting out according to the size of the scaffold configuration drawing, arranging the adjusting seats to fixed points;

s2: the sleeve part of the main frame of the standard base is upwards sleeved above the adjusting seat, and the lower edge of the standard base is completely arranged in a groove of a wrench stress plane;

s3: a first layer of cross bars: sleeving the cross rod head into the small hole of the disc, enabling the front end of the cross rod head to abut against the main frame circular tube, and penetrating the small hole through a wedge to be fixedly knocked;

s4: flattening the main frame: the main frame without the connecting rod is called as a flat main frame, the long end of the flat main frame is inserted into a sleeve of a standard base, whether the flat main frame is inserted to the bottom of the sleeve is checked according to the position of an inspection hole, the flat main frame is only used for the first layer to be lapped, and the main frame is used for the second layer upwards;

s5: a second layer cross bar, wherein the second layer cross bar is installed according to the step S3;

s6: a first layer of inclined rods: erecting the inclined rods in the clockwise or counterclockwise direction, sleeving the inclined rods into the positions of the large holes of the circular disc, enabling the front ends of the inclined rod heads to abut against the main frame circular tube, penetrating the large holes by using inclined wedges for knocking and fixing, and paying attention to the fact that the inclined rods have directionality and cannot be lapped in the opposite direction;

s7: a third layer of cross bars: installing a third layer of cross bars according to the step S3;

s8: second-layer diagonal rods: according to the setting mode of the step S6, a second layer of diagonal rods are overlapped in the same direction as the first layer, if the first layer is assembled in the anticlockwise direction, the diagonal rods above the second layer are assembled in the anticlockwise direction;

s9: the main frame: the main frame is connected by a square tube connecting rod, and the connecting rod is inserted into the lower layer tube;

s10: fourth layer horizontal pole: installing a fourth layer of cross rods according to the step S3, wherein the cross rods need to be installed one layer at each step and are assembled according to the actual height, and if the cross rods are installed at the uppermost layer of the support frame, namely below the U-shaped adjusting seat, the distance between every two layers cannot exceed one standard step pitch regardless of the height of the cross rods overlapping several layers;

s11: the third layer of diagonal rods: according to the assembling and assembling mode of the step S6, a third layer of diagonal rods is overlapped in the same direction as the first layer and the second layer;

s12: u type adjustment seat: the U-shaped adjusting seat tooth tube is inserted into the main frame tube and then adjusted to the required height by a wrench.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention solves the problem of building a major movable stage with short period, high difficulty and high security level by applying the disc buckle type scaffold to the design and construction of an ultra-large stage structure system.

2. According to the invention, through targeted processing on a special node structure, an ultra-long and ultra-large screen structure is successfully designed and constructed, the maximum displacement of the top of the structure is monitored by 19mm, and the test of 10-grade strong wind is successfully carried out for many times.

Drawings

FIG. 1 is a floor plan of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a schematic view of an installation structure of an adjusting base and a standard base according to the present invention;

FIG. 4 is a schematic view of a standard base and first layer rail mounting configuration of the present invention;

FIG. 5 is a schematic view of a flat main frame according to the present invention;

FIG. 6 is a schematic structural diagram of the frame body of the present invention;

fig. 7 is an arc plan view of the present invention.

The objects, features, and advantages of the present invention will be further explained with reference to the accompanying drawings.

The reference numbers illustrate:

1. the coil buckle frame is matched with a steel pipe; 2. a socket type disc buckle frame; 21. an adjusting seat; 22. a standard base; 23. a first layer of cross bars; 24. flattening the main frame; 3. a second layer of cross-bars; 4. a first layer of diagonal rods; 5. a third layer of cross bars; 6. a second layer of diagonal rods; 7. a main frame; 8. a fourth layer of cross bars; 9. a third layer of diagonal rods; 10. a U-shaped adjusting seat; 11. and a balancing weight.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, the invention provides an ultralong and oversized arc-shaped demonstration screen fixing structure built by adopting a light high-strength steel material, which comprises an ultralong and oversized arc-shaped demonstration screen fixing structure rapidly mounted and dismounted on a hardened natural ground, wherein a building frame body of the fixing structure is composed of a steel pipe 1 and a socket type disc buckle frame 2 matched with the disc buckle frame, and the socket type disc buckle frame 2 structurally comprises an adjusting seat 21, a standard base 22, a first layer cross rod 23 and a flat main frame 24;

an adjusting seat 21 which can be arranged at the arrangement position of the fixed point;

the sleeve part of the main frame 7 is sleeved above the adjusting seat 21 upwards, and the lower edge of the standard base 22 is completely arranged in a groove of a wrench-entering stress plane;

a first layer of cross rod 23, which is sleeved in the position of the small hole of the disc, so that the front end of the cross rod head is propped against the main frame 7 round pipe, and then the cross rod head penetrates through the small hole by a wedge and is fastened and fixed;

a flat main frame 24, and the long end of the flat main frame 24 is inserted into the sleeve of the standard base 22. Wherein the flat main frame 24 is only used on the first layer for overlapping, and the main frames 7 are used on the second layer upwards;

the disc buckling frame is matched with a steel pipe and integrally formed with a socket type disc buckling frame, and further comprises a second layer of cross rod 3, a first layer of inclined rod 4, a third layer of cross rod 5, a second layer of inclined rod 6, a main frame 7, a fourth layer of cross rod 8, a third layer of inclined rod 9 and a U-shaped adjusting seat 10, the second layer of cross rod 3, the third layer of cross rod 5 and the fourth layer of cross rod are respectively laid in the horizontal directions of different heights of the fixed structure, the first layer of inclined rod 4, the second layer of inclined rod 6 and the third layer of inclined rod 9 are respectively and obliquely laid on different height positions of the fixed structure in a crossed mode, the main frame 7 is formed by combining the first layer of inclined rod 4 and the second layer of inclined rod 6 with the first layer of cross rod, the second layer of cross rod and the third cross rod, and the U-shaped adjusting seat 10 is fixedly installed at the top of a pipeline of the main frame 7; the adjusting seat 21, the standard base 22, the first layer cross rod 23 and the flat main frame 24 are combined with the second layer cross rod 3, the first layer inclined rod 4, the third layer cross rod 5, the second layer inclined rod 6, the main frame 7, the fourth layer cross rod 8, the third layer inclined rod 9 and the U-shaped adjusting seat 10, so that the fixing structure is convenient to install and disassemble.

Referring to fig. 1 and 2, the length of the frame body of the fixing structure is between 160 and 180m, the width is between 20 and 26m, and the height is between 36 and 45m, and the frame body is set to be step-shaped at the position where the screen is not hung on the back surface; the longitudinal and transverse spacing of the frame body is 1.8m, and the step pitch is 1.5 m. The vertical rod is made of a phi 48 steel pipe with the wall thickness of 3.2mm and Q355B. The cross bar is made of a phi 48 steel pipe with the wall thickness of 2.5mm and Q235B. The vertical inclined rod adopts phi 42, the wall thickness is 2.5mm, and Q195 is adopted, and the frame body is made into a step shape at the position where the screen is not hung on the back, so that the frame body material is saved, and the influence of wind pressure on the frame body is reduced.

Referring to fig. 2 and 7, the arc-shaped frame body of the fixed structure is formed by connecting module frame bodies, the lateral inclined rods of the arc-shaped frame body are fully distributed, 2 channels are arranged on each module of the positive inclined rod, and the modules are pulled and connected by steel pipes; connect through the module support body and constitute the arc support body for the arc support body conveniently dismantles the use, and every module size is 9m long to 19.8m support body width direction x 42m direction of height.

Referring to fig. 1, 4 and 5, the fixed structure has 4.5m horizontal cross braces for the frame body, vertical cross braces are additionally arranged on the side surface of the middle part of the frame body, the cross braces are arranged in three steps and two spans, each span is arranged, and two rows of steel pipe cross braces are respectively arranged at the front and the back of the bottom of the frame body and each span for knotting; the frame body is horizontally shored by 4.5m3 steps. Vertical cross braces are additionally arranged on the side face of the middle part of the frame body, the cross braces are arranged in three steps and two spans, and each span is arranged. Two rows of steel pipe scissors braces are respectively arranged at the front and the back of the bottom of the frame body for each span to perform knot pulling.

Referring to fig. 1, 4 boarding streets are arranged at the middle part of a frame body of the fixed structure, and section steel underpinning is adopted at the entrance of each street; the man-riding way is arranged in the middle of the frame body, so that the frame body can be conveniently lifted up and down by constructors.

Referring to fig. 2, the bottom cable channel of the fixed structure is underpinned by profile steel and a cover plate; the cable is convenient to install and use by adopting the section steel.

In some embodiments, the materials in the present application are all made of light high-strength steel, and the chemical components by mass fraction are as follows: c: 1.0-1.2%, Mn: 15-23 wt%, Al: 14 to 16 percent of Nb, 0.01 to 0.2 percent of Nb, less than or equal to 0.03 percent of S, less than or equal to 0.03 percent of P, and the balance of Fe. The density is less than 6.5g/cm³The yield strength is 1000-1200 MPa, the tensile strength is 1100-1300 MPa, and the elongation is more than 20%.

Furthermore, 3-5% of Cr is added into the light high-strength steel, so that the corrosion resistance of the steel is improved, the structure of the steel is a full-austenite structure, and nano-scale K carbides which are uniformly dispersed and distributed exist in austenite grains.

Referring to fig. 6 and 7, a plurality of balancing weights 11 are disposed at a lower side of the frame body of the fixing structure; through adding in the support body and joining in marriage heavy piece 11, can improve the holistic stability of support body, increase its anti-wind performance.

s1: after setting out according to the size of the scaffold configuration drawing, arranging the adjusting seats 21 to fixed points;

s2: the sleeve part of the main frame 7 of the standard base 22 is sleeved upwards above the adjusting seat 21, and the lower edge of the standard base 22 is required to be completely arranged in a groove of a wrench stress plane;

s3: first-layer cross bar 23: sleeving the cross rod head into the small hole of the disc, enabling the front end of the cross rod head to abut against the main frame 7 circular tube, and penetrating the small hole by using a wedge to be fixedly knocked;

s4: the flat main frame 24: the main frame 7 without the connecting rod is called as a flat main frame 24, the long end of the flat main frame 24 is inserted into the sleeve of the standard base 22, whether the flat main frame 24 is inserted to the bottom of the sleeve is checked according to the position of the inspection hole, the flat main frame 24 is only used for the first layer to be lapped, and the main frame 7 is used for the second layer upwards;

s5: the second layer cross bar 3, the second layer cross bar 3 is installed according to the step S3;

s6: first-layer inclined rod 4: erecting the inclined rods in the clockwise or counterclockwise direction, sleeving the inclined rods into the large holes of the disc, enabling the front ends of the inclined rod heads to abut against the main frame 7 circular tube, penetrating the large holes by using inclined wedges for knocking and fixing, and paying attention to the fact that the inclined rods have directionality and cannot be lapped in the opposite direction;

s7: third layer cross bar 5: installing the third layer of cross bars 5 according to the step S3;

s8: second-layer diagonal rod 6: according to the setting mode of the step S6, a second layer of diagonal rods 6 are overlapped in the same direction as the first layer, if the first layer is assembled in the counterclockwise direction, the diagonal rods above the second layer are assembled in the counterclockwise direction;

s9: the main frame 7: the main frame 7 is connected by a square tube connecting rod, and the connecting rod is inserted into the lower layer tube;

s10: fourth-layer cross bar 8: installing a fourth layer of cross bars 8 according to the step S3, wherein the cross bars need to be installed one layer at each step and are assembled according to the actual height, and if the cross bars are installed at the uppermost layer of the support frame, namely below the U-shaped adjusting seat 10, the distance between every two layers cannot exceed one standard step pitch no matter the height is overlapped for several layers;

s11: third-layer diagonal rod 9: according to the assembling and assembling mode of the step S6, a third layer of diagonal rods 9 are overlapped in the same direction as the first layer and the second layer;

s12: u-shaped adjusting seat 10: the tooth tube of the U-shaped adjusting seat 10 is inserted into the tube of the main frame 7 and then adjusted to the required height by a spanner.

Example one

The main site screen is 174m long, wide 15m, high 39m and sets up in outdoor open place, and personnel carry the stage property from the bottom and get into the stage at the back, need reserve big passageway, hollow structural system with the structural design bottom. The screen is heavy (0.45kg/m2), and various structural systems are required to be designed according to different conditions for fixing the overlong and overweight screen. And (4) determining that the areas of the large channels reserved at the middle part, the north and south sides and the bottom are designed into a steel structure system by a project team through a detailed survey site, and designing other areas into a combined system of the plate buckle frame body. Software such as midas is adopted to carry out three-dimensional modeling design calculation, and the construction method is considered in a targeted manner, so that the structural design of the overlong and overweight screen is successfully solved. After setting out the dimensions of the scaffold layout, arranging the adjusting seats 21 to fixed points, sleeving the sleeve part of the main frame 7 of the standard base 22 upwards above the adjusting seats 21, completely sleeving the lower edge of the standard base 22 into the groove of the stress plane of the wrench, sleeving the cross rod into the position of the small hole of the disc by the first layer cross rod 23, enabling the front end of the cross rod head to abut against the main frame 7 circular tube, then fastening and fastening by the small hole of the inclined wedge through, inserting the main frame 7 without the connecting rod into the main frame 24, inserting the long end of the flat main frame 24 into the sleeve of the standard base 22, checking whether the flat main frame 24 is inserted to the bottom of the sleeve by the position of the check hole, enabling the flat main frame 24 to be only used for the first layer lap joint, sleeving the cross rod into the small hole of the disc by the second layer cross rod 3, enabling the front end of the cross rod to abut against the main frame 7 circular tube, then fastening and fastening by the small hole of the inclined wedge through, thereby completing the installation of the second layer cross rod 3, the first layer of the inclined rod 4 is used for setting the inclined rods all clockwise or all anticlockwise, the inclined rods are sleeved in the positions of the large holes of the disc, the front ends of the inclined rod heads are abutted against a main frame 7 circular tube, then the inclined wedges penetrate through the large holes to be fixedly knocked, the inclined rods have directionality, the inclined rods cannot be lapped in the opposite directions, the cross rods of the third layer of the inclined rods 5 are sleeved in the positions of the small holes of the disc, the front ends of the inclined rod heads are abutted against the main frame 7 circular tube, then the inclined wedges penetrate through the small holes to be fixedly knocked, the third layer of the cross rods 5 are installed, the inclined rods of the second layer of the inclined rods 6 are set all clockwise or all anticlockwise, the inclined rods of the second layer of the inclined rods 6 are sleeved in the positions of the large holes of the disc, the front ends of the inclined rod heads are abutted against the main frame 7 circular tube, then the inclined wedges penetrate through the large holes to be fixedly knocked, the inclined rods have directionality, the inclined rods have opposite directions, the inclined rods of the second layer of the inclined rods 6 are overlapped in the same direction as the first layer, if the first layer of the first layer is assembled in the anticlockwise direction, the inclined rods above the second layer are assembled in the anticlockwise direction, the main frame 7 is connected by a square tube connecting rod, the connecting rod is inserted into the lower layer tube, the cross rod sleeves 8 of the fourth layer are sleeved into the position of the small hole of the disc, the front end of the cross rod head is propped against the circular tube of the main frame 7, then the inclined wedge penetrates through the small hole and is fixedly knocked, the fourth layer of cross rod 8 is installed, the cross rod is installed by one layer at each step, the assembly is carried out according to the actual height, if the inclined rod is installed below the uppermost layer of the support frame, namely the U-shaped adjusting seat 10, the distance between each layer does not exceed a standard step distance regardless of the height of the overlapped layers, the inclined rods 9 of the third layer are all erected in the clockwise direction or all erected in the anticlockwise direction, the inclined rod sleeves the position of the large hole of the disc, the front end of the inclined rod head is propped against the main frame 7, then the inclined wedge penetrates through the large hole and is fixedly knocked, and the inclined rod has directionality, and the direction is not overlapped in the opposite direction, and the inclined rod can not be overlapped with the first layer, The second layer is lapped with a third layer of diagonal rods 9 in the same direction, the tooth tubes of the U-shaped adjusting seat 10 are inserted into the tubes of the main frame 7, and then the height is adjusted to the required height by a spanner;

description of the drawings:

the specification and model of the plate buckling frame rod piece are as follows:

the steel pipe 1 for matching the coil buckle frame: phi 48 is 3.2 is 2000mm, phi 48 is 3.2 is 1500mm, phi 48 is 3.2 is 1000mm,

a plurality of horizontal poles: Φ 48 × 2.5 × 540mm, Φ 48 × 2.5 × 840mm, Φ 48 × 2.5 × 1740mm,

a plurality of down tube: Φ 42 × 2.5 × 900 × 1500mm, Φ 42 × 2.5 × 1800 × 2000 mm;

the pin and pin disc buckling frame, the horizontal scissor brace and the stair and the main frame body adopt galvanized steel pipes and fasteners,

the specification and the size of the galvanized steel pipe are as follows: Φ 48 × 3.0 × 1200mm, Φ 48 × 3.0 × 3000mm, Φ 48 × 3.0 × 4500mm, Φ 48 × 3.0 × 6000 mm;

galvanized fastener: cross and rotation;

10# channel steel: 1600mm, 2700mm, 3300mm, 4000mm, 6000 mm;

galvanized steel springboard: 250, 50, 1.3, 4000mm, 250, 50, 1.5 and 3000mm, and the steel springboard is firmly bound by 8# steel wires;

stair sloping: 1500mm 90, 0mm, stair steel tread: 900mm, hook pedal: 900 mm;

prefabricating a concrete balancing weight 11: 380mm 180mm 130mm, the individual weighing 25 kg. 1T of mesh is placed along each step of the frame body, and the periphery of the frame body is tightly provided with a large mesh along the height direction, so that the counter weight blocks are prevented from falling;

the upper and lower layers of double channel steel at the projection and counterweight positions are fixed by 8# steel wires, and the double channel steel is fixed by M16 screws or U-shaped cards;

the bottom of the vertical rod is provided with an adjustable bottom support, the height difference of the original ground slope is adjusted by lengthening the adjustable bottom support and the short rod, and when the height exceeds 500mm, a horizontal rod is additionally arranged;

all the outer sides of the horse ways of the frame body are fully distributed with big-eye safety nets, and every 3 steps are fully distributed with a horizontal big-eye safety net along the height of the frame body;

the longitudinal and transverse vertical diagonal draw bars are fully distributed from bottom to top in a splayed arrangement along the first span inward around the frame body to form a stable lattice column unit;

the height difference between the site and the given +/-0.000 standard height is leveled by adjusting the length of the vertical rod, the cross rod and the cross support, the overall height of the frame body set up is calculated from +/-0.000, and the specific set up height is determined according to the actual ground elevation on the site;

the design is carried out according to the wind-resistant overturn-preventing safety technical requirement in the technical requirement for temporarily setting up stage and stand safety of performance places: 1) the wind power in the field is less than or equal to 5 level; 2) enduring wind speed less than or equal to 10.7 m/s; 3) has the capability of resisting gust (wind speed is 20 m/s). When the wind speed exceeds 5 levels, the frame body is stopped to be used, and when the wind speed exceeds 20m/s, personnel are quickly evacuated to a safe area;

the weather enclosure is made of military weather cloth, and is 1700mm in length, 1700mm in width, 1450mm in height of a front door, 1950mm in height of a rear door, 5 binding pieces on each of four edges of the upper portion of the weather enclosure, and 5 buttonholes on each of four edges of the bottom portion of the weather enclosure. The number of the rain-proof sheds is 10;

the vertical large meshes are fully distributed along the bottommost step on the periphery of the outer side of the frame body, and the vertical large meshes are distributed along the bottommost step on the two sides of the channel;

because the field is uneven and has larger height difference, before the frame body is erected, the bottom of the frame body needs to be leveled by using an adjustable bottom support and an erecting rod piece, and the specific height difference is based on the actual field measurement.

The socket type disc buckle type steel pipe scaffold structure is essentially a semi-rigid space frame steel structure, and the connection between the horizontal rods and the vertical rods is a connection form between hinging and rigid connection. The field is not allowed to be provided with a pulling node, so the frame body is not connected with the ground, and the wind load is resisted by the stability of the frame body. The machining precision of each component unit of the coiling buckle scaffold body is crucial to the horizontal wind load resistance of the scaffold body, the coiling buckle scaffold is assembled and spliced by unit rods, a certain adjusting space is reserved between the rods for convenient installation and disassembly, if the machining precision of the rods cannot meet the requirement, the overall verticality cannot be guaranteed, and particularly under the wind load effect, the second-order effect can be more prominent.

Wherein, the anti ten grades of strong winds of narrow screen structure in spacious place height and lightning protection key technology:

the high-narrow screen structure adopts a disc buckle frame body which is fast to mount and dismount. The plate buckle frame body is quickly assembled through the rod piece units and is mainly used in a formwork supporting system for resisting vertical load. And the screen structure in an open field is controlled by horizontal wind load, and a high-narrow structure system is scattered and is flexible, poor in integrity and weak in wind resistance. In addition, the wind load of a general temporary structure (Beijing is considered according to the basic wind pressure of 0.3KN/m2) is considered according to the lower limit of eight-grade wind, and the strong wind can reach more than ten grades in spring in open places. How to design the frame body and the node structure to ensure that the structure can resist ten-level strong wind becomes a difficult problem.

The overall stability of the frame body is improved through concept design and construction measures, if the frame body is fully pulled by a transverse diagonal draw bar, a longitudinal partition 1 is pulled 1, a peripheral 2-span diagonal draw bar is fully pulled, a horizontal cross brace is arranged at every 3 parts, and a cable wind rope is arranged inside the frame body to be pulled oppositely, so that a plurality of lattice type combined frame bodies with good self-stability capability are formed inside the frame body to enhance the integrity of the frame body. In addition, the upright rod base and the steel plate base plate are welded, the butt joint of the upright rods is fully provided with a bolt, the bottom of the upright rod is additionally provided with a concrete counterweight, and the upper part of the upright rod is not necessary to be provided with a springboard and other special construction measures are adopted to successfully resist multiple ten-level strong wind.

And the weight of the cement bricks and the concrete blocks is set at the bottom of the frame body according to calculation, and the weight needs to be placed after the vertical rod pins are screwed down and the bottom inclined struts are well made. The method comprises the following steps: two 10# channel steel are placed on a disc of the disc buckling frame to serve as main beams of the ballast platform, fastening bolts M8 are arranged at intervals of 1000mm to clamp the channel steel and a disc buckling vertical rod circular tube, 10# channel steel is arranged at intervals of 500mm on the main beams to serve as secondary beams, binding is firm by 14# iron wires between the secondary beams and the main beams, and the full-paved springboard serves as a ballast bearing surface layer on the secondary beams.

Set up tall and big metal support body structure in spacious place, the support body adopts galvanized steel pipe, receives the thunder and lightning shock easily, and it is crucial to take shelter from the thunder and lightning, and this technique provides spacious place superelevation screen structure lightning protection system and node means. Utilize zinc-plated dish to detain the frame as the lightning arrester, utilize the vertical pole setting of dish knot frame as the downlead, enclose fender department at the field and set up artifical earthing pole, progressively draw the thunder and lightning to artifical earthing pole from the support body eminence.

The technology for fixing the screen on the plate buckle frame body comprises the following steps:

the super-large screen is assembled by 0.5m multiplied by 1m unit screens, the local part of the connecting disc of the disc buckling frame protrudes by 35mm, and how to fix the screen on the steel pipe of the frame body becomes a difficult point in engineering. According to the L-shaped component fixing device, one side of the L-shaped component fixing device is fixed on the connecting disc of the disc buckle frame through the bolts, and the screen is fixed through the reserved hole in the other side of the L-shaped component fixing device through the bolts, so that the ultra-long and ultra-high screen is balanced in stress, and the bottom screen is prevented from being crushed due to local stress concentration.

While the invention has been described in further detail in connection with specific embodiments thereof, it will be understood that the invention is not limited thereto, and that various other modifications and substitutions may be made by those skilled in the art without departing from the spirit of the invention, which should be considered to be within the scope of the invention as defined by the appended claims.

Claims

1. The utility model provides an overlength super large arc demonstration screen fixed knot constructs which characterized in that: the super-long and super-large arc-shaped demonstration screen fixing structure is quickly mounted and dismounted on the hardened natural ground, a building frame body of the fixing structure is formed by a steel pipe matched with a disc buckling frame and a socket type disc buckling frame integrally, and the socket type disc buckling frame structure comprises an adjusting seat, a standard base, a first layer of cross rods and a flat main frame;

2. The ultra-long and ultra-large arc-shaped demonstration screen fixing structure of claim 1, which is characterized in that: the length of the frame body of the fixing structure is between 160 and 180m, the width is between 20 and 26m, the height is between 36 and 45m, and the position of the frame body, on the back surface of which the screen is not hung, is set to be step-shaped.

3. The ultra-long and ultra-large arc-shaped demonstration screen fixing structure of claim 2, characterized in that: fixed knot structure's arc support body is formed by connecting the module support body, arc support body side direction down tube is full of cloth, and 2 are arranged to every module of positive down tube, adopts the steel pipe to carry out the drawknot between the module.

4. The ultra-long and ultra-large arc-shaped demonstration screen fixing structure of claim 1, which is characterized in that: the horizontal bridging 4.5m of the frame body of the fixed structure is one, the vertical bridging is additionally arranged on the side face of the middle part of the frame body, the bridging is arranged in three steps and two spans, each span is arranged, and the steel pipe bridging is arranged in each row of the front and the back of the bottom of the frame body and each span to perform knot drawing.

5. The ultra-long and ultra-large arc-shaped demonstration screen fixing structure of claim 1, which is characterized in that: 4 boarding streets are arranged in the middle of the frame body of the fixed structure, and section steel underpinning is adopted at a street entrance.

6. The ultra-long and ultra-large arc-shaped demonstration screen fixing structure of claim 1, which is characterized in that: and the bottom cable channel of the fixed structure is underpinned by profile steel and a cover plate.

7. The ultra-long and ultra-large arc-shaped demonstration screen fixing structure of claim 1, which is characterized in that: the supporting steel pipe of buckling the frame with the dish and detaining integrative constitution of frame still include second floor horizontal pole, first layer down tube, third layer horizontal pole, second floor down tube, body frame, fourth layer horizontal pole, third layer down tube and U type adjustment seat, second floor horizontal pole, third layer horizontal pole and fourth horizontal pole are laid respectively at fixed knot structure's not co-altitude horizontal direction, first layer down tube, second layer down tube and third layer down tube alternately slope respectively and are laid on fixed knot structure's not co-altitude position, the body frame combines first layer down tube and second layer down tube to constitute by first horizontal pole, second horizontal pole and third horizontal pole, U type adjustment seat fixed mounting is in the top position of body frame pipeline.

8. The ultra-long and ultra-large arc-shaped demonstration screen fixing structure of claim 1, which is characterized in that: and a plurality of balancing weights are arranged at the lower side part of the frame body of the fixed structure.

9. The fixing structure and the mounting and dismounting method of the ultralong and ultralarge arc-shaped demonstration screen are characterized in that: the method specifically comprises the following steps of,