CN208056613U - A kind of overhanging type framed bent sets up structure - Google Patents

Abstract

The utility model provides a cantilevered bent frame erecting structure, comprising cantilevered beams, wall parts, flexible anchor ropes, vertical poles, large horizontal bars, small horizontal bars, and scissors braces; the cantilevered beams are provided with diagonal braces; The angle between the wall part and the rock face is 45-90°; one end of the flexible anchor rope is connected to the wall part, and the other end is connected to the cantilever beam; the bottom of the pole is set on the support platform, and the support platform is welded on On the cantilever beam; the large horizontal bar is arranged along the length direction of the bent frame, the large horizontal bar and the vertical bar are connected by fasteners, and the left and right adjacent two sections of large horizontal bars are overlapped and fixed by fasteners; the small horizontal bar The poles are laid on the large crossbars, and the small crossbars are not in direct contact with the rock face; the inclined bars of the scissor brace are connected with the large crossbars. The utility model improves the stability of the cantilever bent frame, ensures construction safety, and is convenient and simple to erect, and is suitable for water conservancy and hydropower, traffic bridges, high and steep side slope support in mines and similar projects.

Description

A cantilevered bent frame erection structure

technical field

The invention relates to a cantilevered bent frame erecting structure and a construction method, which are mainly applicable to water conservancy and hydropower, traffic bridges, high and steep side slope support in mines and similar projects.

Background technique

Bent frame, also known as scaffolding, refers to various supports erected on the construction site for workers to operate and solve vertical and horizontal transportation. It is composed of steel pipes, fasteners, etc. With the rapid development of national infrastructure construction, the height of racking is getting higher and higher, and the risk of safety production has increased significantly. According to the statistics of the national security department, among the casualties of safety accidents in the project, more than 60% were caused by the accident of racking.

There are two main types of bent racks, namely, floor bent racks and cantilevered bent racks. The former can be erected on the foundation, so the safety and reliability are guaranteed to a certain extent; while the cantilever bent racks have no foundation and belong to suspended bent racks. The security risk is huge.

Contents of the invention

The first technical problem to be solved by the present invention is to provide a cantilever bent frame erection structure for the above existing problems, which is mainly suitable for water conservancy and hydropower, traffic bridges, high and steep slope support in mines and other similar projects. The technical scheme adopted in the present invention is:

A cantilevered bent frame erection structure is characterized in that it includes cantilever beams, wall parts, flexible anchor ropes, vertical poles, large horizontal bars, small horizontal bars, and scissors braces;

The cantilever beam is provided with diagonal braces; the angle between the wall part and the rock face is 45-90°; one end of the flexible anchor rope is connected to the wall part, and the other end is connected to the cantilever beam; the bottom of the vertical rod is set on the support On the platform, the support platform is welded on the cantilever beam; the large horizontal bar is arranged along the length direction of the bent frame, the large horizontal bar and the vertical bar are connected by fasteners, and the left and right adjacent two sections of large horizontal bars are overlapped and connected with buckles. The parts are fixed; the small crossbar is laid on the large crossbar, and the small crossbar does not directly contact with the rock face; the inclined bar of the scissors brace is connected with the large crossbar.

Further, when the height of the cantilevered bent frame is greater than 12m, the erected structure of the cantilevered bent frame is provided with multi-layered cantilevered beams.

Further, the cantilever beams are made of 16# channel steel, and the spacing L of the cantilever beams is set according to the vertical distance of the vertical pole, and one is set for each vertical distance; the anchorage length into the rock is not less than 2.5m; The rock is generally controlled at about 2.0m; the angle Q between the cantilever beam and the diagonal brace is generally 30-45°.

Further, the wall-connecting parts adopt inserting ribs.

Further, the wall parts adopt inserting bars, and the inserting bars should adopt threaded steel bars not less than φ25mm; the length of the inserting bars of the wall parts is not less than 1.0m, the entry into the rock is not less than 0.6m, and the exposed area is 0.4m.

Further, the flexible anchor rope adopts a Φ16mm steel rope, and the flexible anchor rope is inclined 30-45° from the horizontal plane. Both ends of the anchor rope are fixed into a ring with rope clips, and each end is not less than 3 rope clips.

Further, the support platform is made of 16# channel steel, which is welded on the upper part of the cantilever beam, and the bottom of the vertical pole is placed in the groove of the 16# channel steel of the support platform; each vertical pole is welded with a Φ25mm threaded steel bar corresponding to the channel steel part of the support platform. The vertical rod is fixed on the channel steel groove of the supporting platform, and the fixed point of the outer vertical rod is not less than 0.1m from the end of the cantilever beam.

Further, the overlapping length of the vertical bar is not less than 1m, and the connection is fixed with no less than three fasteners; the overlapping length of the large horizontal bar is not less than 1m, and the connection is fixed with no less than three fasteners fixed.

Furthermore, the scissors bracing is made of the same steel pipe material as the large horizontal bar, and it is set according to the principle of horizontal bottom and vertical to edge; the width of each scissor brace is not less than 4 spans, and the width is not less than 6m. The inclination angle is between 45° and 60°.

The present invention also provides a construction method of a cantilevered bent frame erecting structure, which is characterized in that it includes the following steps:

(1) Foundation rock surface cleaning,

Before the construction, the dangerous stones on the foundation rock surface shall be systematically cleaned to prevent the dangerous stones from falling off in the subsequent construction;

(2) cantilever beam setting,

Cantilever beams 2 are set at the bottom of the cantilever bent frame. The cantilever beams are made of 16# channel steel. The cantilever length is set according to 2.0m, the anchorage length into the rock is not less than 2.5m, the cantilever beam is equipped with diagonal braces, and the diagonal braces are made of 12# channel steel, and the rock entry is generally controlled according to about 2.0m; the angle between the cantilever beam and the diagonal brace Generally, 30-45° is taken; when the height of the cantilever bent frame is greater than 12m, the cantilever beams are arranged layer by layer on the vertical height;

(3) Setting of connecting wall parts:

Inserting bars are used for connecting wall parts, and the inserting bars should be threaded steel bars not less than φ25mm. The angle between the inserting bars and the foundation rock surface is 45-90°, which is determined according to the site terrain conditions. If the terrain conditions permit, 45° is used. ; The length of the inserted ribs of the wall parts shall not be less than 1.0m, the length of the intrusion into the rock shall not be less than 0.6m, and the exposed area shall be 0.4m; two steps and two strides;

(4) flexible anchor rope connection

The flexible anchor rope adopts Φ16mm steel rope, which is fixed with the outer end of the cantilever beam. The anchor rope and the horizontal plane form an upward angle of 45°. , and respectively socketed with the wall parts and cantilever beams;

(5) Pole connection and setting

The bottom of the pole is set on the support platform, the support platform is made of 16# channel steel, the support platform is welded on the cantilever beam, the bottom of the pole is placed in the groove of the 16# channel steel of the support platform; Weld the Φ25mm threaded steel bar to fix the pole on the groove of the channel steel, and the distance from the fixed point of the outer pole to the end of the cantilever beam is not less than 0.1m;

(6) Large crossbar setting

The large horizontal bar and the vertical bar are connected with fasteners, and the left and right adjacent two sections of large horizontal bars are overlapped and fixed with fasteners. The overlapping length is not less than 1m and not less than three fasteners;

(7) Small horizontal bar setting

The small horizontal bar is laid on the upper part of the large horizontal bar, and the two are fixed with fasteners. The small horizontal bar is made of the same steel pipe material as the large horizontal bar; the small horizontal bar is not in direct contact with the foundation rock surface, and the distance between the two is generally about 0.2m ;

(8) Scissors setting

The oblique bar of the scissors brace is connected with the large crossbar, and the scissors brace is made of the same steel pipe material as the large crossbar, and it is set according to the principle of horizontal bottom and vertical edge; the width of each scissors brace is not less than 4 spans and not less than 6m wide. The inclination angle between the oblique bar of the scissors brace and the ground is between 45° and 60°.

The invention improves the stability of the cantilever bent frame, ensures construction safety, is convenient and simple to erect, and is suitable for water conservancy and hydropower, traffic bridges, high and steep side slope support in mines and similar projects.

Description of drawings:

Fig. 1 is a front schematic view of a typical part of the embodiment of the cantilevered bent frame erecting structure of the present invention.

Fig. 2 is a cross-sectional view of another typical part of the embodiment of the cantilevered bent frame erecting structure of the present invention.

Fig. 3 is a schematic diagram of the vertical bar and the large horizontal bar being fixed by fasteners.

Fig. 4 is a schematic diagram of the wall connecting piece.

Fig. 5 is a schematic diagram of the overlapping of large crossbars and being fixed by fasteners.

Detailed ways

Refer to attached picture. The cantilevered bent frame erection structure provided by the present invention includes cantilever beams 2 , wall parts 3 , flexible anchor ropes 4 , vertical poles 5 , large crossbars 6 , small crossbars 7 , and scissor braces 8 .

The embodiment of the construction method of a cantilever bent frame erecting structure of the present invention is as follows:

a. Cleaning of foundation rock surface 1: As shown in Figure 2, in order to ensure the safety during the erection, operation and dismantling of the bent frame, the dangerous rocks on the foundation rock surface 1 are systematically cleaned before construction to prevent dangerous stones in subsequent construction If it falls off, it will endanger the safety of the construction personnel and equipment in the lower part.

b. Cantilever beam 2 setting: the cantilever beam 2 is set at the bottom of the cantilever bent frame. The cantilever beam 2 is generally made of 16# channel steel. Set one for each longitudinal distance. The cantilever length L1 of the cantilever beam 2 is generally set at 2.0m, and the anchorage length L2 into the rock is not less than 2.5m. Generally, it is controlled according to about 2.0m. The included angle Q between the cantilever beam 2 and the diagonal brace 20 is generally taken as 30-45°, and the angle should not be too small, and the specific value is determined according to the site topographical conditions.

In order to ensure the safety of the bent frame, when the height of the cantilevered bent frame is greater than 12m, the cantilever beam 2 should be arranged in layers on the vertical height. The height H of the cantilever beam 2 is generally 8-12m, and the specific value depends on The overall height is determined.

c. Setting of wall connecting piece 3: the cantilevered bent frame connecting wall piece 3 adopts inserting ribs, and the inserting ribs should adopt threaded steel bars not less than φ25mm, and the angle between the inserting ribs and the foundation rock surface 1 is 45-90°, depending on the site The terrain conditions are determined, and if the terrain conditions permit, take 45°; the length of the inserted reinforcement of the connecting wall part 3 is not less than 1.0m, the length of the inserted rock is not less than 0.6m, and the exposed area is 0.4m; the connecting wall parts 3 are arranged according to the row spacing between the design , for cantilevered bent frames with a height exceeding 24m, the distance between rows shall not be less than two steps and two spans.

d. Connection of the flexible anchor rope 4: The flexible anchor rope 4 is fixed with a Φ16mm steel rope and the outer end rope of the cantilever beam 2. The anchor rope 4 and the horizontal plane form an upward angle of 45°. The clips are fixed into a ring 40, with no less than 3 rope clips at each end, and are respectively socketed with the exposed part of the wall part and the cantilever beam 2.

e. Pole 5 setting: the vertical pole 5 of the bent frame is set on the support platform 21, the support platform 21 adopts 16# channel steel, the support platform 21 is welded on the cantilever beam 2, and the bottom of the vertical pole 5 is put into the support platform 21 16# channel steel groove. Each upright pole 5 is welded with Φ25mm, L=0.2m threaded steel bars corresponding to the channel steel part to fix the upright pole on the groove of the channel steel, and the distance from the fixed point of the outer upright pole to the end of the cantilever beam 2 is not less than 0.1m.

f. Large horizontal bar 6 setting: the large horizontal bar 6 and the vertical bar 5 are connected with fasteners 9, and the left and right adjacent two sections of large horizontal bars are overlapped and fixed with fasteners 9. The large horizontal bar 6 should be a 6m steel pipe. In order to reduce lap joints, when lap joints, the length of the lap joints shall not be less than 1m, and shall not be less than three fasteners.

g. Small crossbar 7 setting: The small crossbar 7 is laid on the upper part of the large crossbar 6, and the two are fixed with fasteners 9. The small crossbar 7 is made of the same steel pipe material as the large crossbar 6; the small crossbar 7 should not be connected with the foundation The rock face 1 is in direct contact, and the distance between the two is generally about 0.2m.

h. Setting of scissors brace 8: The oblique bar of scissors brace is connected with the large horizontal bar with fastener 9, and the scissors brace 8 is made of the same steel pipe material as that of the large horizontal bar 6, and it is required to follow the principle of horizontal to bottom and vertical to edge when setting; The width of the scissors brace 8 should not be less than 4 spans, and should not be less than 6m wide, and the inclination angle between the oblique bar of the scissors brace 8 and the ground should be between 45° and 60°.

The above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Those of ordinary skill in the art, within the scope of the present invention, make changes, additions or substitutions, which should belong to the protection scope of the present invention .

Claims (9)

1. A cantilevered bent frame erecting structure is characterized in that it comprises cantilever beams, wall parts, flexible anchor ropes, vertical bars, large cross bars, small cross bars, and scissors braces; Cantilever beams are provided with diagonal braces; The angle between the wall connecting piece and the rock face is 45-90°; One end of the flexible anchor rope is connected to the wall part, and the other end is connected to the cantilever beam; The bottom of the pole is set on the support platform, and the support platform is welded on the cantilever beam; The large horizontal bar is arranged along the length direction of the bent frame, the large horizontal bar and the vertical bar are connected by fasteners, and the left and right adjacent two sections of large horizontal bars are overlapped and fixed by fasteners; The small crossbar is laid on the large crossbar, and the small crossbar is not in direct contact with the rock surface; The oblique bar of the scissors brace is connected with the large cross bar. 2. A cantilevered bent frame erection structure according to claim 1, wherein when the cantilevered bent frame height is greater than 12m, the cantilevered bent frame erected structure is provided with multi-layered cantilevered beams. 3. A kind of cantilevered bent frame erection structure as claimed in claim 1, characterized in that the cantilevered beam adopts 16# channel steel, the distance L of the cantilevered beam is set according to the vertical distance of the vertical pole, and one vertical distance is set for each vertical distance. ; The anchorage length into the rock is not less than 2.5m; the diagonal brace adopts 12# channel steel, and the rock entry is generally controlled at about 2.0m; the angle Q between the cantilever beam and the diagonal brace is generally 30-45°. 4. A cantilevered bent frame erecting structure as claimed in claim 1, characterized in that the connecting wall parts are made of inserted ribs. 5. A cantilevered bent frame erection structure as claimed in claim 1, characterized in that the wall parts are inserted ribs, and the inserted ribs should be threaded steel bars not less than φ25mm; the length of the inserted ribs of the wall parts is not less than 1.0m , not less than 0.6m into the rock, and 0.4m exposed. 6. A cantilevered bent frame erection structure as claimed in claim 1, characterized in that the flexible anchor rope adopts a Φ16mm steel rope, the flexible anchor rope is inclined 30-45° from the horizontal plane, and the two ends of the anchor rope are Use rope clips to fix it into a ring, with no less than 3 rope clips at each end. 7. A kind of cantilevered bent frame erecting structure as claimed in claim 1, characterized in that the support platform adopts 16# channel steel, which is welded on the top of the cantilever beam, and the bottom of the vertical pole is put into the 16# channel steel of the support platform In the groove; each vertical pole is welded with Φ25mm threaded steel bar corresponding to the channel steel part of the supporting platform to fix the vertical pole on the channel steel groove of the supporting platform, and the distance from the fixed point of the outer vertical pole to the end of the cantilever beam is not less than 0.1m. 8. A cantilevered bent frame erection structure as claimed in claim 1, characterized in that the overlapping length of the vertical rods is not less than 1m, and the joints are fixed with no less than three fasteners; the large horizontal The lap length of the rods is not less than 1m, and the joints are fixed with not less than three fasteners. 9. A kind of cantilevered bent frame erection structure as claimed in claim 1, characterized in that the scissors bracing adopts the same steel pipe material as the large horizontal bar, and is set according to the principle of horizontally to the bottom and vertically to the side; the width of each scissors brace Not less than 4 spans, and not less than 6m wide, the inclination angle between the oblique bar of the scissors brace and the ground is between 45° and 60°.