CN212359799U - Cable for flexible arch and flexible arch with cable - Google Patents

Abstract

The utility model relates to a card for flexible bow member is pulled and is had the flexible bow member that this card was pulled, wherein the card is pulled and has last cardboard and lower cardboard that can dismantle the connection, and the card of going up the cardboard is held the width and is adapted to with the upper shed width of shaped steel in the flexible bow member, and the card of lower cardboard is held the width and is adapted to with the cross-section width of shaped steel in the flexible bow member, and the side of cardboard is equipped with the gusset under. The utility model discloses effectively improved intensity and the rigidity that the card was pulled, obviously optimized the card and pulled the atress situation that structure and card were pulled, still made the stability of sliding that the flexible bow member connects out simultaneously and obtained increasing substantially, still avoided shaped steel interlock phenomenon to appear at the in-process that slides to the phenomenon of flexible bow member emergence blocking is avoided.

Description

Cable for flexible arch and flexible arch with cable

Technical Field

The utility model relates to an equipment for construction, a flexible bow member that is used for the card of flexible bow member to seize and has this card to seize specifically says.

Background

The flexible arch is also called as a flexible arch, and is mainly suitable for primary support after tunnel excavation, for example, in order to limit excessive displacement of surrounding rocks and maintain the stability of the surrounding rocks, the flexible arch provides support resistance greater than the minimum loosening pressure generated by the damage of the surrounding rocks. The shape is not limited to a circular shape, and may be a portal arch shape, a horseshoe shape, or the like. The tunnel country rock takes place to shrink under the effect of ground stress and warp, and flexible bow member contracts along with the country rock in the lump to can full play country rock self-supporting ability, reduce country rock pressure, make the country rock take place a certain amount after warping with flexible bow member reach the force balance.

In the structure of the existing flexible arch frame, the strength of the lap joint of two sections of section steel is always a common problem, the lap joint of the two sections of section steel is connected by clamping cables, in practical application, as the surrounding pressure is continuously increased, the lap joint part of the two sections of section steel can generate relative sliding shrinkage under the action of external force, so that a connecting bolt of the clamping cables is subjected to the sliding shearing force, the clamping cables are greatly bent and the bolt is bent, when the relative sliding distance exceeds a specified value, the clamping cables can be damaged, the strength of the whole flexible arch frame is further greatly reduced, and serious safety problems can be caused. And when the profile steel shrinks and slides under the action of external force, the two sections of profile steel are mutually occluded at the place where the arch is built, so that the flexible arch is prevented from sliding, the flexible arch becomes a rigid arch, and the significance of the flexible arch is lost.

SUMMERY OF THE UTILITY MODEL

The utility model provides a card for flexible bow member is pulled and is had the flexible bow member that this card was pulled to improve the intensity rigidity that the card was pulled, optimize the atress situation that the card was pulled, and improve the shaped steel overlap joint stability of sliding of flexible bow member.

The utility model is used for the card of flexible bow member is pulled, has last cardboard and lower cardboard that can dismantle the connection, and the card of going up the cardboard holds the upper shed width of shaped steel in width and the flexible bow member and suits, and the card of lower cardboard holds the cross-section width that width and flexible bow member well shaped steel and suits, and the side of cardboard is equipped with the gusset under.

The lower clamping plate is preferably provided with the rib plates on two side surfaces, so that the overall strength and rigidity of the lower clamping plate are improved. When the shaped steel is slided by external force, the upper clamping plate and the lower clamping plate can be effectively prevented from sliding in opposite directions, the joint of the upper clamping plate and the lower clamping plate is prevented from being damaged due to strong shearing force, and the stress condition of the joint of the upper clamping plate and the lower clamping plate is optimized.

Furthermore, the upper end of the side face of the lower clamping plate is provided with lower clamping plate lug parts extending towards two sides, and the rib plate is connected with the side faces of the lower clamping plate lug parts and the lower clamping plate into an integral structure in a welding mode and the like.

Furthermore, the lower end of the side face of the upper clamping plate is provided with upper clamping plate ears extending towards two sides, 2 rib plates are arranged on the side face of the lower clamping plate at intervals, when the clamping cable is in the installation state, the upper clamping plate ears of the upper clamping plate are positioned between the 2 rib plates at intervals, and the tops of the rib plates are higher than the bottom faces of the upper clamping plate ears. The upper clamping plate is also limited by the 2 rib plates at intervals, so that the upper clamping plate and the lower clamping plate cannot slide in opposite directions along with the section steel when the two sections of section steel slide mutually, and the stress condition of the joint of the upper clamping plate and the lower clamping plate is further optimized.

Furthermore, the upper end of the side surface of the lower clamping plate is provided with a protruding structure which is used for being attached to the inner fillet of the ear part of the section steel. Under the installation state, through the protruding structure of cardboard side upper end department and the interior fillet laminating of ear of shaped steel down, can make down cardboard and shaped steel laminating more stable. Meanwhile, because the part of the two sections of section steel which are jointed in the lapping process is also near the ear part of the section steel, when the clamping cable clamps the section steel, the clamping force can directly act on the jointing surface of the section steel, thereby being more beneficial to the stable increase of the resistance when the section steel shrinks and slides. When the flexible arch frame contracts along with the contraction of the surrounding rock, the pressure of the surrounding rock is reduced, and meanwhile, the sliding resistance of the flexible arch frame is increased, so that the supporting counter force of the flexible arch frame on the surrounding rock is increased, and a stable supporting state is formed when the pressure of the surrounding rock and the supporting counter force are balanced.

Furthermore, the upper clamping plate and the lower clamping plate are detachably connected through a threaded fastener.

One of them preferred structure does, and the side lower extreme of going up the cardboard is equipped with the last cardboard ear that extends to both sides, and the side upper end of lower cardboard is equipped with the lower cardboard ear that extends to both sides, and when the installation state of card cable, through passing the bolt connection of last cardboard ear and lower cardboard ear go up cardboard and lower cardboard.

Further, still be equipped with bolt complex nut, in addition to, can also directly pass the through-hole of bolt and set up in the through-hole with bolt complex screw thread structure at last cardboard ear and lower cardboard ear.

The utility model also provides a flexible arch center has two sections at least upper and lower lapped shaped steel, seizes two sections shaped steel clamp-on laminates through foretell card in the overlap joint section of two sections shaped steel.

Furthermore, the end part of the lap joint section of the section steel is provided with a chamfer structure for preventing the two sections of section steel from being mutually occluded when the section steel slides and contracts and deforms. After the flexible arch frame receives external force, the lap joint of its shaped steel can take place to slide the shrink under the effect of external force, when shaped steel is U shaped steel, the camber of U shaped steel can reduce when taking place to slide the shrink, for the section extrusion outside shaped steel of the in-process inboard shaped steel of avoiding sliding the shrink takes place shaped steel interlock phenomenon, consequently sets up the tip of inboard shaped steel into the chamfer structure, makes the flexible arch frame can not lead to hindering smooth because shaped steel takes place the interlock phenomenon like this at the in-process that slides.

The utility model discloses a card for flexible bow member is pulled and has the flexible bow member that this card was pulled, has effectively improved the intensity and the rigidity that the card was pulled, has obviously optimized the card and has pulled the atress situation that structure and card were pulled, still makes the stability of sliding that the flexible bow member connects out obtain increasing substantially simultaneously, has still avoided shaped steel to appear the interlock phenomenon at the in-process that slides to the phenomenon of sliding has been avoided flexible bow member to take place to hinder.

The above-mentioned aspects of the present invention will be further described in detail with reference to the following embodiments. This should not be understood as limiting the scope of the above-described subject matter of the present invention to the following examples only. Various substitutions and alterations according to the general technical knowledge and conventional means in the field are included in the scope of the present invention without departing from the technical idea of the present invention.

Drawings

Fig. 1 is a schematic view of a flexible arch structure of the cable clamp of the utility model.

Fig. 2 is a partially enlarged view of a portion Z in fig. 1.

Fig. 3 is a schematic view of the flexible arch-shaped steel lap joint section of fig. 1 after cable clamping is installed.

Fig. 4 is a view from direction B of fig. 3.

Fig. 5 is a schematic structural view showing a state where the cable mounting is completed.

Fig. 6 is a view of plane a-a of fig. 3.

Fig. 7 is a partially enlarged view of the portion Y in fig. 2.

Detailed Description

As shown in fig. 1 to 4, the flexible arch center of the present invention includes a plurality of U-shaped steel sections 1 which are vertically overlapped, and two U-shaped steel sections 1 are clamped and attached to each other by means of a clamping cable 2 at the overlapping section of the two U-shaped steel sections 1.

As shown in fig. 3 to 6, the card cable 2 has an upper card board 21 and a lower card board 25 detachably connected. The clamping width of the upper clamping plate 21 is matched with the width of an upper opening of the U-shaped steel 1 in the flexible arch, and the clamping width of the lower clamping plate 25 is matched with the width of the cross section of the U-shaped steel 1 in the flexible arch. The side lower extreme of going up cardboard 21 is equipped with the last cardboard ear that extends to both sides, is equipped with the lower cardboard ear that extends to both sides equally at the side upper end of cardboard 25 down. And a protruding structure 27 used for being attached to the inner fillets of the ears of the U-shaped steel 1 is arranged on the shoulder part at the joint of the ears of the lower clamping plate and the upper end of the side surface of the lower clamping plate 25. Under the mounted state, protruding structure 27 through cardboard 25 shoulder down is laminated with the fillet of ear of U shaped steel 1, can make down cardboard 25 and the more stable of U shaped steel 1 laminating. Meanwhile, because the part of the two sections of U-shaped steel 1 which are attached to each other in the lap joint process is also near the ear part of the U-shaped steel 1, when the clamping cable 2 clamps the U-shaped steel 1, the clamping force can directly act on the attaching surface of the U-shaped steel 1, and the stable increase of the resistance when the U-shaped steel 1 shrinks and slides is more facilitated.

In the cable-attaching state, the upper card 21 and the lower card 25 are connected by a bolt 22 passing through the upper card ear and the lower card ear and a nut 24 engaging with the bolt 22. To enhance the tightness of the nut 24, a flat washer 23 is also provided between the nut 24 and the lower catch plate ear. The upper clamping plate 21 and the lower clamping plate 25 are detachably connected through the bolts 22 and the nuts 24.

Two side surfaces of the lower clamping plate 25 are respectively provided with 2 rib plates 26 at intervals. The rib plates 26 are welded with the lug parts of the lower clamping plate and the side faces of the lower clamping plate 25 to form an integral structure, so that the integral strength and rigidity of the lower clamping plate 25 are improved. When the U-shaped steel 1 slides under external force, the upper clamping plate and the lower clamping plate can be effectively prevented from sliding in opposite directions, and the bolt 22 for connecting the upper clamping plate and the lower clamping plate is prevented from being damaged due to strong shearing force, so that the stress condition of the bolt 22 is optimized. When the cable is mounted, the upper clamping plate ear part of the upper clamping plate is positioned between the 2 spaced rib plates, and the top parts of the rib plates are higher than the bottom surfaces of the upper clamping plate ear parts, so that the rib plates 26 also have a limiting effect on the upper clamping plate 21, the upper clamping plate and the lower clamping plate can not slide in opposite directions along with the U-shaped steel when the two sections of U-shaped steel slide mutually, and the stress condition of the bolt 22 is further optimized.

When the flexible arch frame receives external force, the lapping part of the U-shaped steel 1 can slide and shrink under the external force, at the moment, the curvature of the U-shaped steel 1 can be reduced, the section of the inner side U-shaped steel in the sliding and shrinking process is prevented from extruding the outer side U-shaped steel to generate the profile steel meshing phenomenon, as shown in figure 7, the end part of the inner side U-shaped steel is set to be a chamfering structure 11, and therefore the flexible arch frame cannot be blocked due to the fact that the U-shaped steel 1 is meshed in the sliding process.

Claims (9)

1. A card cable for flexible bow member, characterized by: the flexible arch center steel section bar clamping device is characterized by comprising an upper clamping plate (21) and a lower clamping plate (25) which are detachably connected, wherein the clamping width of the upper clamping plate (21) is matched with the width of an upper opening of a section steel (1) in a flexible arch center, the clamping width of the lower clamping plate (25) is matched with the width of the cross section of the section steel (1) in the flexible arch center, and a rib plate (26) is arranged on the side surface of the lower clamping plate (25).

2. The cable of claim 1 for a flexible arch, wherein: the upper end of the side face of the lower clamping plate (25) is provided with lower clamping plate lug parts extending towards two sides, and the rib plates (26) are connected with the lower clamping plate lug parts and the side face of the lower clamping plate (25) into an integral structure.

3. The cable of claim 2 for a flexible arch, wherein: the lower end of the side face of the upper clamping plate (21) is provided with upper clamping plate ears extending towards two sides, the side face of the lower clamping plate (25) is provided with 2 rib plates (26) at intervals, when the clamping cable is in a mounting state, the upper clamping plate ears of the upper clamping plate (21) are positioned between the 2 rib plates (26) at intervals, and the tops of the rib plates (26) are higher than the bottom faces of the upper clamping plate ears.

4. The cable of claim 1 for a flexible arch, wherein: and a protruding structure (27) used for being attached to the inner fillet of the ear part of the section steel (1) is arranged at the upper end of the side surface of the lower clamping plate (25).

5. The cable of claim 1 for a flexible arch, wherein: the upper clamping plate (21) and the lower clamping plate (25) are detachably connected through threaded fasteners.

6. The cable of claim 5 for a flexible arch, wherein: go up the side lower extreme of cardboard (21) and be equipped with the last cardboard ear that extends to both sides, the side upper end of lower cardboard (25) is equipped with the lower cardboard ear that extends to both sides, and when the installation state of card cable, through passing last cardboard ear and bolt (22) of lower cardboard ear connect up cardboard (21) and lower cardboard (25).

7. The cable of claim 6, for a flexible arch, wherein: a nut (24) is also provided which cooperates with the bolt (22).

8. Flexible bow member, characterized by: the steel section (1) is provided with at least two sections which are overlapped up and down, and the two sections (1) are clamped and jointed by the clamping cable (2) of one of claims 1 to 7 at the overlapped section of the two sections (1).

9. The flexible arch of claim 8 wherein: the end part of the lap joint section of the section steel (1) is provided with a chamfer structure (11) for preventing the two sections of section steel (1) from being mutually occluded when the section steel (1) slides, contracts and deforms.

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