CN107288361B - High-rise falling-prevention backward anchoring self-hanging double-layer horizontal safety net device and construction method thereof - Google Patents
High-rise falling-prevention backward anchoring self-hanging double-layer horizontal safety net device and construction method thereof Download PDFInfo
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- CN107288361B CN107288361B CN201710709656.4A CN201710709656A CN107288361B CN 107288361 B CN107288361 B CN 107288361B CN 201710709656 A CN201710709656 A CN 201710709656A CN 107288361 B CN107288361 B CN 107288361B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
- E04G21/3261—Safety-nets; Safety mattresses; Arrangements on buildings for connecting safety-lines
- E04G21/3266—Safety nets
Abstract
A high-rise falling-prevention backward anchoring self-hanging double-layer horizontal safety net device and a construction method thereof are disclosed, wherein a plurality of rows of steel cable pull rings with intervals of 1-3 meters are arranged on the outer side of a shear wall with the same height or on the vertical surfaces of the left side and the right side of a column structure, the height of the periphery of the first layer of the periphery of a high-rise building is not more than 5 m; the fixed base in the first layer outside of this shear force wall, the bottom mounting of steel bracing mobile jib on the base, the upper end of steel bracing mobile jib is to the outside slope of shear force wall, is equipped with lower floor's safety net installation component on the upper portion of this steel bracing mobile jib towards one side of shear force wall, is equipped with upper safety net installation component on the top of this steel bracing mobile jib. The invention has the advantages that: the artifical string net of fungible is being greater than the high altitude more than 5m apart from the natural terrace in the engineering outside promptly, hangs the wide double-deck horizontal safety net of 6m at the outside edge of scaffold frame of encorbelmenting and can replace artifical string net with this device, and the installation is dismantled conveniently, repeatedly usable, economical and practical, safe and reliable, easy operation.
Description
Technical Field
The invention relates to a high-rise falling-prevention backward anchoring self-hanging double-layer horizontal safety net device and a construction method thereof, belonging to the technical field of safety protection of high-rise building construction sites.
Background
Beijing local standard DB/11-945-2012 Standard for safety protection, sanitation and fire protection in construction sites of construction engineering, standard for site and Container, 2.8.4: when a floor scaffold and an overhanging scaffold are used on the outer side of a construction project, a dense mesh type safety net is arranged on the outer side of the scaffold for sealing. Except for using a floor scaffold and a high-altitude operation hanging basket, a horizontal safety net is required to be erected for protection. A double-layer horizontal safety net with the width of 6m is erected on the periphery of the first floor of the high-rise building, and the distance between the net bottom and a contact surface is not less than 5m. A horizontal safety net with the width of 3m is arranged at intervals of four floors and not more than 10m in multi-storey and high-rise buildings. The safety nets are arranged according to the regulations, the traditional method is that a double-layer horizontal safety net with the overhanging width of 6m is suspended and erected around the upper layer, the double-layer horizontal safety net at the edge of the outmost side of a scaffold frame with the overhanging width of 6m is used for climbing to the edge of the outer side of the scaffold frame with the overhanging width of 6m to hang nets, and safety accidents are easy to happen when the outer side of the scaffold with the overhanging width of 6m is more than 5m away from the natural ground in a high-altitude suspension mode; in addition, the existing safety net mounting device does not have the functions of being detachable, reusable, free from people, self-hanging and the like.
Disclosure of Invention
The invention aims to provide a high-rise falling-prevention anchoring self-hanging double-layer horizontal safety net device and a construction method thereof, and aims to solve the problems that safety accidents are easily caused by a high-altitude hanging net which is more than 5m away from the natural ground outside a scaffold with the width of 6m overhanging, and the existing safety net installation device has no functions of being detachable, reusable, free of people getting on, self-hanging net and the like in the prior art.
The technical scheme of the invention is as follows:
a high-rise falling-prevention backward anchoring self-hanging double-layer horizontal safety net device is characterized by comprising steel cable pull rings, steel diagonal bracing main rods, an upper-layer safety net, a lower-layer safety net mounting assembly and an upper-layer safety net mounting assembly, wherein two rows of steel cable pull rings which are vertically corresponding and are spaced by 1-3 meters at the same height are arranged on the periphery of a first layer of the periphery of a high-rise building, and the height of the first layer is not more than 5 m; the bottom end of the steel diagonal bracing main rod is fixed on a high-rise building through a base, the upper end of the steel diagonal bracing main rod inclines towards the outer side of the building, a lower-layer safety net mounting assembly is arranged on one side, facing the building, of the upper part of the steel diagonal bracing main rod, and an upper-layer safety net mounting assembly is arranged at the top end of the steel diagonal bracing main rod; a lateral net penetrating steel pipe of the lower safety net and a lateral net penetrating steel pipe of the upper safety net are respectively arranged outside the upper safety net and the lower safety net; the net penetrating steel pipe at the side of the lower safety net and the net penetrating steel pipe at the side of the upper safety net are respectively connected with one end of an inner traction rope and one end of an outer traction rope; the inner edges of the upper layer safety net and the lower layer safety net are respectively connected with one ends of the lifting ropes on the opposite sides of the upper layer safety net and the lower layer safety net, and the other ends of the lifting ropes on the opposite sides of the upper layer safety net and the lower layer safety net respectively penetrate through the steel cable pull rings above and below and droop to the ground.
This lower floor safety net installation component includes: the right end of the left ear plate is welded and connected with the left side of the steel diagonal bracing main rod, the middle part of the left ear plate is provided with an upward protruding middle peak, the top end of the middle peak is provided with the small direction-changing pulley, and the inner head sheave is arranged above the right end of the left ear plate; a left lug plate groove is arranged on the left side of the middle peak, a left lug plate anti-impact limiting card is arranged on the upper portion of the left side of the inner edge of the left lug plate groove, and a left rope slideway is arranged on the upper portion of the left outer edge of the groove; the fulcrum at the corner of the L-shaped inner unloading lever is hinged to the middle part of the left lug plate through an inner unloading lever fulcrum bearing and is positioned below the middle peak; the right end of the inner unloading lever is connected with an inner unloading pull rope; an inner unloading lever limiting bolt is arranged on the left side ear plate corresponding to the upper part of the right end of the inner unloading lever; the other end of the inner hauling rope sequentially rounds the left rope slideway, the small turning pulley and the upper surface of the inner head sheave on the left ear plate and then droops to the ground.
The upper layer safety net mounting assembly comprises: the left side of the right ear plate is connected with the right side of the top of the steel diagonal bracing main rod through a downward and leftward bent arm, the middle of the right ear plate protrudes upwards, and the upper pulley and the lower pulley are distributed and mounted at the upper part and the lower part of the protruding top end; a right side ear plate groove is arranged at the right part of the right side ear plate, a right side ear plate anti-impact limiting card is arranged at the upper part of the left side inner side of the right side ear plate groove, and a right side rope slideway is arranged at the right side upper part of the right side ear plate; the fulcrum at the corner of the L-shaped outer unloading lever is hinged to the middle part of the protruding part of the right side ear plate through an outer unloading lever fulcrum bearing, and the left end of the outer unloading lever is connected with an outer unloading pull rope; an outer unloading lever limiting bolt is arranged on the right side ear plate corresponding to the lower part of the right end of the outer unloading lever.
The vertical distance between the inner head sheave and the outer head sheave is 1.0 to 1.5 m.
The other end of the outer hauling cable goes round the right rope slideway on the right ear plate, the lower pulley and the upper surface of the outer head sheave in sequence and then hangs down to the ground.
The construction method of the anti-falling behind anchoring self-hanging double-layer horizontal safety net device for the high-rise building is characterized by comprising the following steps of:
(1) At least two rows of steel cable pull rings are arranged on the outer side of the building body; a net penetrating steel pipe at the side of the lower layer safety net and a net penetrating steel pipe at the side of the upper layer safety net are respectively arranged outside the upper layer safety net and the lower layer safety net; the side net penetrating steel pipe of the lower layer safety net and the side net penetrating steel pipe of the upper layer safety net are respectively connected with one end of an inner traction rope and one end of an outer traction rope; the inner edges of the upper layer safety net and the lower layer safety net are respectively connected with one end of the turning stay cord of the upper layer safety net and one end of the lifting stay cord on the opposite side of the lower layer safety net, and the other ends of the lifting stay cords on the opposite sides of the upper layer safety net and the lower layer safety net respectively pass through the steel cable pull rings on the upper surface and the lower surface and then droop to the ground; the distance between the upper layer safety net and the lower layer safety net is 0.6-1.5m, or the distance between the inner head sheave and the outer head sheave on the vertical height is 1.0-1.5 m.
(2) Fixing a steel diagonal bracing main rod at the bottom of the outer side of the building body, wherein the upper end of the steel diagonal bracing main rod inclines towards the outer side of the building body; one side of the upper part of the steel diagonal bracing main rod facing the building body is provided with a lower layer safety net mounting component, and the top end of the steel diagonal bracing main rod is provided with an upper layer safety net mounting component.
(3) And lifting the lateral net penetrating steel pipe of the upper layer safety net mounting component into the groove of the upper layer safety net mounting component by using an external hauling rope.
(4) The inner edge of the upper layer safety net is lifted and overturned from the outer side of the upper layer safety net mounting component by using the upper layer safety net overturning stay cord and then is connected with the upper steel cable pull ring.
(5) Lifting the side net penetrating steel pipe of the lower safety net into a groove of the lower safety net mounting component by using an inner hauling rope; the inner edge of the lower layer safety net is lifted by the upper lifting rope of the lower layer safety net opposite to the edge and is connected with the lower steel cable pull ring.
The invention has the advantages that: at two side facade about shear force wall outside side facade or reinforced concrete post, with this device, the artifical hanging net of fungible is that the scaffold frame outside edge outside the 6m width of encorbelmenting outside the building engineering promptly, hang the wide double-deck horizontal safety net of 6m, can replace artifical hanging net with this device, this device installation is dismantled conveniently, be favorable to used repeatedly, economy and practicality, safety and reliability, the operation is thus simple, current safety net installation device can be overcome in the use of this device and current does not have can dismantle, can multiplex, exempt from people, from functions such as hanging net, the function of artifical hanging net has been realized exempting from.
Drawings
FIG. 1 is a schematic overall structure diagram of an embodiment of a high-rise falling-prevention lagging anchoring self-hanging double-layer horizontal safety net constructed by the method of the invention;
FIG. 2 is a schematic structural view of the shear wall mounting base A of FIG. 1;
FIG. 3 is a right side view of FIG. 2;
FIG. 4 is an enlarged view of the inner head plate of FIG. 1;
FIG. 5 is an enlarged view of the outer head plate of FIG. 1;
FIG. 6 is a schematic front view of a post structure mounting base D of the present invention;
FIG. 7 isbase:Sub>A sectional view A-A of FIG. 6;
fig. 8 is a schematic view of the installation manner of the column structure installation base.
Description of the reference numerals:
1. a natural ground; 2. the first floor of indoor ground; 3. second floor indoor floor; 4. the ground of each floor above the first floor; 5. a steel cable pull ring; 6. a steel diagonal bracing main rod; 7. lifting lugs; 8. a left side ear panel; 81. a left ear plate groove, 82, a left rope slide; 83. middle peak; 9. a net steel pipe penetrates through the side of the lower layer safety net; 10. the inner side unloads the pull rope; 11. a steel pipe penetrates through the side of the upper layer safety net; 12. a small direction-changing pulley; 13. an inner head sheave; 14. an inner unloading lever; 141. a rope pulling strapping hole; 15. an internal unloading lever fulcrum bearing; 16. an inner unloading lever limit bolt; 17. an outer unload lever; 171. rope pulling and bundling holes; 18. a shear wall; 19. an outer head sheave; 20. a right side ear plate; 201. a right side ear plate groove; 202. a right rope run; 203. bending the arm; 21. a lower pulley; 22. an upper pulley; 23. the upper layer safety net turns over the stay cord; 24. the right ear plate is provided with an anti-impact limiting card; 25. an upper layer safety net; 26. a lower layer safety net; 27. the left ear plate is provided with an anti-impact limiting clamp; 28. a bending-resistant stay cable; 30. a rear anchor bolt; 31. anchoring a steel plate; 311. a fixing hole; 32. a horizontal steel rib plate; 33. sealing the bottom steel sleeve; 331. fastening holes; 34. fastening a bolt; 35. a vertical steel rib plate; 36. a column structure 37, an external unloading lever limit bolt; 38. an inner hauling rope; 39. an outer hauling rope; 40. externally unloading the lever fulcrum bearing; 41. the upper lifting rope is arranged on the opposite side of the lower safety net; 42. unloading the pull rope from the outer side; A. a shear wall mounting base; B. a lower layer safety net mounting component; C. an upper layer safety net mounting component; D. the post structure mounts the base.
Detailed Description
Referring to fig. 1-5, the method for constructing the anti-falling lagging anchoring self-hanging double-layer horizontal safety net for the high-rise building outside the shear wall 18 comprises the following steps:
(1) An upper row of steel cable pull rings 5 and a lower row of steel cable pull rings 5 are arranged on the outer side of a shear wall 18 of the building body; the side net penetrating steel pipes 9 and 11 of the lower layer safety net and the upper layer safety net are respectively arranged outside the upper layer safety net 25 and the lower layer safety net 26; the side net penetrating steel pipe 9 of the lower safety net and the side net penetrating steel pipe 11 of the upper safety net are respectively connected with one end of an inner hauling rope 38 and one end of an outer hauling rope 39; the inner edges of the upper layer safety net 25 and the lower layer safety net 26 are respectively connected with one end of the lifting rope 41 on the opposite sides of the upper layer safety net 23 and the lower layer safety net, and the other end of the lifting rope 41 on the opposite sides of the upper layer safety net 23 and the lower layer safety net respectively passes through the steel cable pull rings 5 on the upper surface and the lower surface to hang down to the ground; the distance between the upper layer safety net 25 and the lower layer safety net 26 is 0.6-1.5m, or the distance between the inner head sheave and the outer head sheave on the vertical height is 1.0-1.5 m.
(2) Fixing a steel diagonal bracing main rod 6 at the outer side of the shear wall 18 on the periphery of the first floor of the high-rise building by using a shear wall mounting base A, wherein the upper end of the steel diagonal bracing main rod 6 inclines towards the outer side of the shear wall 18 (the included angle a between the upper end of the steel diagonal bracing main rod and the outer side of the shear wall 18 is 25-45 degrees); a lower layer safety net mounting component B is arranged on one side of the upper part of the steel diagonal bracing main rod 6 facing the shear wall 18, and an upper layer safety net mounting component C is arranged at the top end of the steel diagonal bracing main rod 6.
(3) And the net penetrating steel pipe 11 at the side of the layer safety net is lifted into the groove of the upper layer safety net mounting component C by an external hauling rope 39.
(4) The inner edge of the upper layer safety net 25 is lifted and overturned from the outer side of the upper layer safety net mounting component C by an upper layer safety net overturning stay cord 23 and then is connected with the upper steel cable pull ring 5.
(5) And the steel pipe 9 penetrating the net at the side of the lower safety net is lifted into the groove of the lower safety net mounting component B by the inner hauling rope 38.
(6) The inner edge of the lower safety net 26 is lifted and connected to the underlying cable loop 5 by the lower net pair edge haul lines 41.
The shear wall mounting support A and the outer side of the shear wall 18 are fixedly mounted, the height from the bottom end of the base A to the ground is not more than 5m, and two rows of the steel cable pull rings 5 with the same height are mounted on the base A, wherein the two rows of the steel cable pull rings are vertically corresponding and spaced by 1-3 m.
Spare tabs 5 can be installed at each level because spare tabs 5 are used for many purposes, except for suspending a 6m horizontal double layer safety net above the high-rise first floor; the safety net can also be used for setting a 3 m-wide horizontal safety net at every four floors of a high-rise building and no more than 10 m; the scaffold can also be used for obliquely pulling (a composite suspended scaffold with horizontal I-shaped steel and a steel wire rope) the end part of the suspended end of the horizontal I-shaped steel (the high suspended scaffold without the basic bracket is arranged on a floor above a high-rise floor as a starting floor).
The shear wall mounting support A is shown in fig. 2 and fig. 3 and comprises an anchoring steel plate 31, a steel diagonal bracing main rod sleeve 33 and a vertical steel rib plate 35, wherein the longitudinal symmetry axis of the anchoring steel plate 31 is connected with a bottom-sealing steel sleeve 33 through the vertical steel rib plate 35, the top end of the bottom-sealing steel sleeve 33 is open, and a plurality of radial fastening holes 331 are formed in the bottom-sealing steel sleeve 33; a plurality of fixing holes 311 are provided in the anchor steel plate 31; horizontal steel rib plates 32 are arranged on two sides of the vertical steel rib plate 35.
The mounting method of the shear wall mounting support A comprises the following steps: according to the drawing requirements, paying off is carried out on the installed rear anchoring steel plate 31, the horizontal steel rib plate 32 and the vertical steel rib plate 35 are integrated, and then according to the included angle a between the outer vertical surface of the high-rise outer side shear wall 18 and the steel diagonal bracing main rod 6, the steel diagonal bracing main rod bottom sealing steel sleeve 33 with the screw hole 331 of the fastening bolt 34 is welded with the horizontal steel rib plate 32 and the vertical steel rib plate 35 into a whole.
The lower safety net mounting component B comprises: the left side ear plate 8, the small direction-changing pulley 12, the inner head sheave 13 and the inner unloading lever 14, the right end of the left side ear plate 8 is welded on the left side of the steel diagonal bracing main rod 6, the middle part of the left side ear plate 8 is provided with a middle peak 83 which protrudes upwards, the top end of the middle peak 83 is provided with the small direction-changing pulley 12, and the inner head sheave 13 is arranged above the right end of the left side ear plate 8; a left lug plate groove 81 is arranged on the left side of the middle peak 83, a left lug plate anti-impact limiting clamp 27 is arranged on the left upper part of the inner edge of the left lug plate groove 81, and a left rope slideway 82 is arranged on the left outer edge upper part of the groove 81; a fulcrum at the corner of the L-shaped inner unloading lever 14 is hinged in the middle of the left ear plate 8 through an inner unloading lever fulcrum bearing 15 and is positioned below the middle peak 83; the right end of the inner unloading lever 14 is connected with an inner unloading pull rope 10; an inner unloading lever limit bolt 16 is arranged on the left side ear plate 8 corresponding to the upper part of the right end of the inner unloading lever 14.
The upper layer safety net mounting component C comprises: the left side of the right ear plate 20 is connected with the right side of the top of the steel diagonal bracing main rod 6 through a downward and leftward bent arm 203, the middle part of the right ear plate 20 protrudes upwards, and the upper pulley 22 and the lower pulley 21 are distributed at the upper part and the lower part of the protruded top end; a right ear plate groove 201 is arranged at the right part of the right ear plate 20, a right ear plate anti-impact limiting card 24 is arranged at the upper part of the left inner side of the right ear plate groove 201, and a right rope slideway 202 is arranged at the right upper part of the right ear plate 20; the fulcrum at the corner of the L-shaped outer unloading lever 17 is hinged in the middle of the protruding part of the right ear plate 20 through an outer unloading lever fulcrum bearing 40, and the left end of the outer unloading lever 17 is connected with an outer unloading pull rope 42; an outer unloading lever stop bolt 37 is provided on the right side ear plate 20 corresponding to the lower right end of the outer unloading lever 17.
The other end of the inner hauling cable 38 sequentially rounds the left rope slideway 82 on the left ear plate 8, the small direction-changing pulley 12 and the upper surface of the inner head sheave 13 and then hangs down to the ground; the other end of the outer hauling cable 39 passes over the right rope slideway 202 on the right ear plate 20, the lower pulley 21 and the upper surface of the outer head sheave 19 in turn and then hangs down to the ground.
A lifting lug 7 is arranged on the left side of the steel diagonal bracing main rod 6, and a bending-resistant diagonal cable 28 is connected between the lifting lug 7 and the steel cable pull ring 5; after the lower horizontal safety net 26 is installed, the two ends of the buckling-restrained stay cables 28 are lockingly connected to the lifting lugs 7 and the cable pull rings 5, respectively.
The outer edges of the upper layer safety net 25 and the lower layer safety net 26 are fixedly connected with the side net penetrating steel pipe 9 of the lower layer safety net and the side net penetrating steel pipe 11 of the upper layer safety net through U-shaped cards.
Referring to fig. 6 to 8, another embodiment of the present invention is that a column structure mounting base D suitable for being mounted on one side or both sides of a frame column or frame shear wall combined column structure 36 perpendicular to the outside thereof is adopted, the column structure mounting base D is composed of an anchor steel plate 31 and a back cover steel sleeve 33, the back cover steel sleeve 33 is welded on the longitudinal middle line of the anchor steel plate 31, the top end of the back cover steel sleeve 33 is open, and a plurality of radial fastening holes 331 are provided on the back cover steel sleeve 33; a plurality of fixing holes 311 are provided in each of the left and right halves of the anchor steel plate 31.
The mounting method of the column structure mounting base D is as follows: the top end of the longitudinal symmetry axis of the whole column structure mounting base D is rotated by an included angle a (the angle range is the same as the previous embodiment) outwards, a bolt 30 penetrates through a fixing hole 311 on an anchoring steel plate 31 to be fixed with the column, and the steel diagonal bracing main rod 6 is inserted into the bottom sealing steel sleeve 33, so that the scaffold with the cantilever outside the construction project beyond 6m in width can be realized. A fastening hole 331 for fastening the bolt 34 is drilled in the sidewall of the bottomed steel sleeve 33. The construction and construction method of the other parts are the same as those of the previous embodiment. The right side of fig. 8 is the outside of the building and the base D is mounted on the left and right side elevations of the post (i.e., the left and right side elevations of the post are perpendicular to the outside elevation of the building). .
The top end of the left side of the inner unloading lever 14 is gradually reduced from top to left and below to the other end of the inner unloading lever, the convergence slope angle is 3 to 10 degrees, the steel pipe 9 penetrating the net at the side of the lower safety net conveniently retreats from the left ear plate groove 81, the inner hauling rope 38 is slowly loosened, and the steel pipe 9 moves downwards along the arc-shaped track of the left rope slideway 82 under the action of self-weight gravity and falls to the ground.
And the 1/3 part of the upper edge of the top end of the long side at the right end of the outer unloading lever 17 is gradually reduced from top to bottom to the other end of the long side, and the contraction slope angle is 3 to 10 degrees, so that the net penetrating steel pipe 11 at the side of the upper safety net is conveniently withdrawn from the groove 201 of the right ear plate, the 38 and the inner hauling rope are slowly loosened, and the steel pipe 9 runs downwards along the arc-shaped track of the left rope slideway 202 under the action of self-weight gravity and falls to the ground.
According to the load calculation and the anti-overturning stability checking calculation, a plurality of anchoring bolts 30 after rooting are designed, the number and the spacing of the anchoring bolts, the diameters of the bolts, the drilling depth and the like are determined through the design calculation, and then the bolt spacing is determined according to the design drawing.
The invention discloses a use method of a high-rise falling-prevention backward anchoring self-hanging double-layer horizontal safety net, which comprises the following steps:
1. the net hanging method of the upper layer safety net 25 is as follows: the outer hauling cable 39 is pulled downwards to hang down to one end of the ground (see one end of the outer hauling cable 39 with an arrow drawn in fig. 1), and the other end of the outer hauling cable 39 lifts the net penetrating steel pipe 11 at the side of the upper safety net until the net penetrating steel pipe is placed in the U-shaped right side ear plate groove 201 at the top of the right side ear plate 20; then, one end of the upper layer safety net overturning stay cord 23 drooping to the ground is pulled, the other end of the upper layer safety net overturning stay cord 23 drives the other side (called as the "inner side", namely, the side connected with the shear wall 18) of the upper layer safety net 25 to go over the upper pulley 22 from the outside to the top, so that the whole upper layer safety net 25 overturns 180 degrees until the inner side of the upper layer safety net 25 and the steel cable pull ring 5 arranged on the outer side of the shear wall 18 are locked by the lock catch, and the net hanging of the upper layer safety net 25 is completed.
When the safety net needs to be unloaded, the outer unloading pull rope 42 is pulled downwards, the right end of the outer unloading lever 17 swings upwards, the side net penetrating steel pipe 11 of the upper safety net in the right lug plate groove 201 is pulled out, the connection between the upper safety net 25 and the steel cable pull ring 5 is released, and the whole upper safety net 25 is unloaded.
2. The method for hanging and unloading the lower layer safety net 26 is basically the same as that of the upper layer safety net 25, and will not be described again.
Claims (9)
1. A high-rise falling-prevention backward anchoring self-hanging double-layer horizontal safety net device is characterized by comprising steel cable pull rings, steel diagonal bracing main rods, an upper-layer safety net, a lower-layer safety net mounting assembly and an upper-layer safety net mounting assembly, wherein two rows of steel cable pull rings which are vertically corresponding and are spaced by 1-3 meters at the same height are arranged on the periphery of a first layer of the periphery of a high-rise building, wherein the height of the first layer is not more than 5 m; the bottom end of the steel diagonal bracing main rod is fixed on a high-rise building through a base, the upper end of the steel diagonal bracing main rod inclines towards the outer side of the building, a lower-layer safety net mounting assembly is arranged on one side, facing the building, of the upper part of the steel diagonal bracing main rod, and an upper-layer safety net mounting assembly is arranged at the top end of the steel diagonal bracing main rod; a net penetrating steel pipe at the side of the lower layer safety net and a net penetrating steel pipe at the side of the upper layer safety net are respectively arranged outside the upper layer safety net and the lower layer safety net; the net penetrating steel pipe at the side of the lower safety net and the net penetrating steel pipe at the side of the upper safety net are respectively connected with one end of an inner traction rope and one end of an outer traction rope; the inner edges of the upper layer safety net and the lower layer safety net are respectively connected with one end of the turning stay cord of the upper layer safety net and one end of the lifting stay cord on the opposite side of the lower layer safety net, and the other ends of the lifting stay cords on the opposite sides of the upper layer safety net and the lower layer safety net respectively pass through the steel cable pull rings on the upper surface and the lower surface and then droop to the ground;
this lower floor safety net installation component includes: the right end of the left ear plate is welded on the left side of the steel diagonal bracing main rod, the middle part of the left ear plate is provided with an upward protruding middle peak, the top end of the middle peak is provided with the small direction-changing pulley, and the inner head sheave is arranged above the right end of the left ear plate; a left lug plate groove is arranged on the left side of the middle peak, a left lug plate anti-impact limiting card is arranged on the upper portion of the left side of the inner edge of the left lug plate groove, and a left rope slideway is arranged on the upper portion of the left outer edge of the groove; the fulcrum at the corner of the L-shaped inner unloading lever is hinged to the middle part of the left lug plate through an inner unloading lever fulcrum bearing and is positioned below the middle peak; the right end of the inner unloading lever is connected with an inner unloading pull rope; an inner unloading lever limiting bolt is arranged on the left side ear plate corresponding to the upper part of the right end of the inner unloading lever; the other end of the inner hauling rope sequentially rounds the left rope slideway on the left ear plate, the small direction-changing pulley and the upper surface of the inner head sheave and then droops to the ground;
the upper layer safety net mounting component comprises: the left side of the right side ear plate is connected with the right side of the top of the steel diagonal bracing main rod through a downward and leftward bent arm, the middle of the right side ear plate protrudes upwards, and the upper pulley and the lower pulley are distributed and mounted at the upper part and the lower part of the protruding top end; a right side ear plate groove is arranged at the right part of the right side ear plate, a right side ear plate anti-impact limiting clamp is arranged at the upper part of the inner side of the left side of the right side ear plate groove, and a right side rope slideway is arranged at the upper part of the right side ear plate; the fulcrum at the corner of the L-shaped outer unloading lever is hinged in the middle of the protruding part of the right side ear plate through an outer unloading lever fulcrum bearing, and the left end of the outer unloading lever is connected with an outer unloading pull rope; an outer unloading lever limiting bolt is arranged on a right side ear plate corresponding to the lower part of the right end of the outer unloading lever;
the vertical distance between the inner head sheave and the outer head sheave is between 1.0 and 1.5m;
the other end of the outer hauling rope sequentially rounds the right rope slideway, the lower pulley and the upper surface of the outer head sheave on the right ear plate and then hangs down to the ground.
2. The high-rise falling-prevention behind-anchoring self-hanging double-layer horizontal safety net device according to claim 1, wherein the base is a shear wall mounting base and comprises an anchoring steel plate, a steel diagonal bracing main rod sleeve and a vertical steel rib plate, the longitudinal symmetry axis of the anchoring steel plate is connected with a bottom-sealing steel sleeve through the vertical steel rib plate, the top end of the bottom-sealing steel sleeve is open, and a plurality of radial fastening holes are formed in the bottom-sealing steel sleeve; the anchor steel plate is provided with a plurality of fixing holes.
3. The device for the high-rise fall-prevention lagging anchoring self-hanging double-layer horizontal safety net according to claim 2, characterized in that horizontal steel rib plates are arranged on two sides of the vertical steel rib plates.
4. The device for the high-rise fall-prevention lagging anchoring self-hanging double-layer horizontal safety net according to claim 1, is characterized in that the base is a column structure mounting base and consists of an anchoring steel plate and a bottom sealing steel sleeve, the bottom sealing steel sleeve is welded on a longitudinal centerline of the anchoring steel plate, the top end of the bottom sealing steel sleeve is open, and a plurality of radial fastening holes are formed in the bottom sealing steel sleeve; the left and right halves of the anchor steel plate are respectively provided with a plurality of fixing holes.
5. The high-rise falling-prevention lagging anchoring self-hanging double-layer horizontal safety net device according to claim 1, wherein a lifting lug is arranged on the left side of the steel diagonal bracing main rod, and a bending-resistant stay cable is connected between the lifting lug and the steel cable pull ring; after the lower horizontal safety net is installed, two ends of the bending-resistant stay cable are respectively connected with the lifting lug and the steel cable pull ring in a locking manner.
6. The high-rise falling-prevention behind-anchoring self-hanging double-layer horizontal safety net device as claimed in claim 1, wherein the outer edges of the upper safety net and the lower safety net are fixedly connected with the net penetrating steel pipes at the sides of the lower safety net and the upper safety net by U-shaped cards.
7. The high-rise falling-prevention behind-anchored self-hanging double-layer horizontal safety net device as claimed in claim 1, wherein the top end of the left side of the inner unloading lever is gradually reduced from top to bottom to the other end of the inner unloading lever, and the convergence slope angle is 3-10 degrees.
8. The high-rise fall-prevention anchorage self-hanging double-layer horizontal safety net device as claimed in claim 1, wherein the upper edge of the top end of the long side of the right end of the outer unloading lever is tapered from top to bottom right to the other end from 1/3, and the convergence slope angle is 3 to 10 degrees.
9. A method for constructing a high-rise falling-prevention lagging anchoring self-hanging double-layer horizontal safety net device according to claim 1, which is characterized by comprising the following steps:
at least two rows of steel cable pull rings are arranged on the outer side of the building body; a net penetrating steel pipe at the side of the lower layer safety net and a net penetrating steel pipe at the side of the upper layer safety net are respectively arranged outside the upper layer safety net and the lower layer safety net; the side net penetrating steel pipe of the lower layer safety net and the side net penetrating steel pipe of the upper layer safety net are respectively connected with one end of an inner traction rope and one end of an outer traction rope; the inner edges of the upper layer safety net and the lower layer safety net are respectively connected with one end of the lifting rope on the opposite side of the upper layer safety net and the lower layer safety net, and the other end of the lifting rope on the opposite side of the upper layer safety net and the lower layer safety net respectively passes through the steel cable pull rings on the upper surface and the lower surface to droop to the ground; the distance between the upper layer safety net and the lower layer safety net is 0.6-1.5m, or the distance between the inner head sheave and the outer head sheave on the vertical height is 1.0-1.5 m;
fixing a steel diagonal bracing main rod at the bottom of the outer side of the building body, wherein the upper end of the steel diagonal bracing main rod inclines towards the outer side of the building body; a lower layer safety net mounting component is arranged on one side of the upper part of the main rod of the steel diagonal brace towards the building body, and an upper layer safety net mounting component is arranged at the top end of the main rod of the steel diagonal brace;
lifting the side net penetrating steel pipe of the upper layer safety net into a groove of the upper layer safety net mounting component by using an external hauling rope;
the inner edge of the upper layer safety net is lifted and overturned from the outer side of the upper layer safety net mounting component by using an upper layer safety net overturning stay cord and then is connected with an upper steel cable pull ring;
lifting the side net penetrating steel pipe of the lower safety net into a groove of the lower safety net mounting component by using an inner hauling rope; the inner edge of the lower layer safety net is lifted by the upper lifting rope of the lower layer safety net opposite to the edge and is connected with the lower steel cable pull ring.
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| CN201710709656.4A CN107288361B (en) | 2017-08-18 | 2017-08-18 | High-rise falling-prevention backward anchoring self-hanging double-layer horizontal safety net device and construction method thereof |
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| CN201710709656.4A CN107288361B (en) | 2017-08-18 | 2017-08-18 | High-rise falling-prevention backward anchoring self-hanging double-layer horizontal safety net device and construction method thereof |
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| CN109914839A (en) * | 2019-04-18 | 2019-06-21 | 北京顺鑫天宇建设工程有限公司 | Light door-window opening roller shutter, which encloses, blocks means of defence |
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