CN213331107U

CN213331107U - Take bow member supporting construction of pterygoid lamina

Info

Publication number: CN213331107U
Application number: CN202022301165.6U
Authority: CN
Inventors: 陶建军; 田晓龙; 范祥; 袁霈龙; 孙振华
Original assignee: Shaoxing Traffic Construction Co ltd; Changan University
Current assignee: Shaoxing Traffic Construction Co ltd; Changan University
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-06-01
Anticipated expiration: 2030-10-15

Abstract

The utility model discloses a take bow member supporting construction of pterygoid lamina, including the reinforcing bar net, be fixed with many pin bow members on the reinforcing bar net, every pin be fixed with the pterygoid lamina on the bow member, the width of pterygoid lamina is greater than the width of bow member, all the bow member lower extreme all with bottom plate fixed connection. Can realize blockking the rock block that drops that collapses under the synergism of pterygoid lamina, bow member and stock hanging net are strutted. Compare in traditional tunnel country rock preliminary bracing, the security is higher, more does benefit to the solution when the tunnel passes through the broken area of fault, the problem that drops of collapsing of rock mass.

Description

Take bow member supporting construction of pterygoid lamina

Technical Field

The utility model belongs to the technical field of tunnel engineering, a supporting of surrounding rock after the tunnel excavation is related to, concretely relates to take bow member supporting construction of pterygoid lamina.

Background

Since the fifties of the twentieth century, the road traffic industry has been rapidly developing with the rapid development of global economy. In recent years, infrastructure construction of roads and the like in the western mountainous area is actively underway. As the mountainous regions in the western region of China are more, the construction of the highway generally needs to pass through the whole mountain, and along with the popularization of the Xinao law, the method for constructing the through-mountain tunnel becomes a popular choice for the construction of traffic infrastructure. However, when a tunnel passes through a large fault fracture zone, the support of the surrounding rock of the tunnel becomes a difficult problem to solve.

The traditional tunnel surrounding rock support is generally carried out in two steps. Primary support is the first step of tunnel support, and is the most important step. At the initial stage of tunnel excavation, the stability of country rock is relatively poor, and current primary support often adopts the supporting mode of bow member with reinforcing bar net and stock, and when the tunnel passed through comparatively broken fault zone, because the interval between horizontal, the longitudinal reinforcement in the reinforcing bar net is too big, is difficult to carry out complete the blockking to the collapse of upper portion country rock and broken rock mass drop. When the tunnel surrounding rock is supported, the traditional support is difficult to completely block the unstable rock mass on the upper part from falling, and the safety of constructors and equipment is greatly influenced. And increasing the number of reinforcing bars between the arches increases the construction cost.

In summary, when a tunnel passes through a large fault fracture zone, the conventional tunnel primary supporting structure is difficult to prevent the upper fractured rock from falling, which may cause adverse factors to safety of constructors and equipment, and further may cause delay of construction period and increase of construction cost.

Disclosure of Invention

The utility model provides a take bow member supporting construction of pterygoid lamina on blockking the basis that the country rock collapses, can also prevent that the rock mass from passing through the gap and dropping, compensaties the shortcoming that independent bow member strutted and can not prevent to fall the piece.

In order to achieve the purpose, the utility model relates to a take bow member supporting construction of pterygoid lamina, including the reinforcing bar net, the reinforcing bar net is fixed with many pin bow members, every pin be fixed with the pterygoid lamina on the bow member, the width of pterygoid lamina is greater than the width of bow member, all the bow member lower extreme all with bottom plate fixed connection.

Furthermore, an oblique supporting steel bar is arranged between the wing plate and the arch center.

Furthermore, a plurality of arch frames are fixedly connected with the transverse hooping.

Further, the arch and the wing plate are fixed by a fastener.

Furthermore, the wing plates and the arch frame are both provided with conduit holes.

Furthermore, the reinforcing mesh comprises transverse reinforcing steel bars and longitudinal reinforcing steel bars which are orthogonally arranged, and intersection points of the transverse reinforcing steel bars and the longitudinal reinforcing steel bars are welded and fixed.

Furthermore, the arch frames are uniformly arranged, and the sum of the distance and the width of the wing plates is equal to the distance of the arch frames.

Further, the wing plate is made of rock wool plate, phenolic plate or foam glass plate.

Compared with the prior art, the utility model discloses following profitable technological effect has at least:

the utility model is suitable for a preliminary bracing in tunnel connects the pterygoid lamina on the bow member, can realize blockking the rock block that drops collapsing under the synergism that pterygoid lamina, bow member and stock are hung the net and are strutted. Compare in traditional tunnel country rock preliminary bracing, the security is higher, more does benefit to the solution when the tunnel passes through the broken area of fault, the problem that drops of collapsing of rock mass.

Furthermore, an inclined support is arranged between the wing plate and the arch center, and the arch center is connected with the bottom plate through I-shaped steel at the bottom end of the arch center, so that the wing plate and the arch center can better cooperatively bear force and keep stable.

Furthermore, besides being connected by a reinforcing mesh, the arch frames are welded by transverse hooping, so that all the arch frames are connected into a whole, and the stress between the arch frames is coordinated.

Furthermore, the wing plates and the arch center are detachably connected, so that the strength of the arch center and the wing plates is not reduced.

Furthermore, conduit holes are formed in the wing plates and the arch centering and used for spraying concrete, and after the concrete is sprayed, the wing plates, the arch centering and the surrounding rock can be stressed more uniformly.

Furthermore, the wing plates can be made of materials with high strength, light weight and low manufacturing cost, and are convenient for construction operation, such as rock wool plates, phenolic aldehyde plates, foam glass plates and the like.

Drawings

Fig. 1 is an overall schematic view of an arch connecting wing plate of the present invention;

FIG. 2 is a side schematic view of an arch connection wing panel;

FIG. 3 is a schematic view of a roof connecting flange of FIG. 1;

FIG. 4 is a schematic view of a connection of two arches;

FIG. 5a is a schematic cross-sectional view of an I-beam;

FIG. 5b is a cross-sectional view of another I-beam;

FIG. 6 is a schematic side view of the arch bottom connection;

fig. 7 is a schematic view of the connection of two wings.

In fig. 1 to 7, 5-catheter holes; 6-transverse steel bars; 7-an arch frame; 8-a bottom plate; 9-wing plate; 10-longitudinal steel bars; 11-transverse stirrups; 12-a bolt; 13-a connecting plate; 15-oblique supporting steel bars.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing and simplifying the present invention, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1 to 7, an arch support structure with a wing plate includes a connection bottom plate 8, an arch 7, a wing plate 9, a reinforcing mesh, and the like, and the functions of each part will be described in detail below.

Referring to fig. 1 and 2, the arch is made of i-steel, which is the basic framework of the whole support, and the thickness and width of the arch are selected according to the requirements of the actual engineering. The wing plates 9 are fixed on the arch center 7 through welding or bolts 12 and nuts, and the circumferential length of the wing plates 9 is determined by the size of the collapse body. The arch frames 7 with the wing plates 9 are welded by longitudinal steel bars 10 to ensure that the stress of the arch frames is stable.

The reinforcing mesh is formed by orthogonally arranging the transverse steel bars 6 and the longitudinal steel bars 10, welding and fixing the intersection points of the transverse steel bars and the longitudinal steel bars, and welding the reinforcing mesh and the arch centering to form a whole body for spray anchor support. Except for the connection of the steel bar nets, the arch frames are welded by transverse hooping 11, so that all the arch frames are connected into a whole, and the stress between the arch frames is coordinated.

Referring to fig. 3, the wing plate and the arch center are connected by an oblique supporting steel bar 15 to meet the stress requirement of the wing plate 9, and the deflection at two sides of the wing plate 9 is reduced, so that the wing plate 9 and the arch center 7 are stressed cooperatively and kept stable.

Referring to fig. 4, arch members are fixedly connected for each arch, and the two arch members are detachably and fixedly connected by a connecting plate 13 and a bolt 12. The arch pieces are made of i-steel as shown in fig. 5a or 5 b.

Referring to fig. 6, the lower end of each arch is connected to the same bottom plate 8, so that the bottom end of the arch is more stable.

All seted up on pterygoid lamina 9 and the bow member 7 and all seted up the conduit hole 5 that is not less than 40mm, the effect of conduit hole 5 is to carry out the slip casting, and the purpose is in order to make can be better laminating between bow member, pterygoid lamina, the tunnel country rock, eliminates the space between them, makes the atress of bow member 7 and pterygoid lamina 9 more even.

Preferably, the wing plate is telescopic or foldable, and the transportation and the construction are more convenient.

Referring to fig. 6, the width a of each arch and the pitch b of each arch 7 are calculated according to actual engineering requirements to ensure the stability of the construction tunnel. The distance c between the adjacent wing plates 9 is not more than 30cm, the width d of the wing plates is more than 60cm, and the sum of the distance c between the wing plates 9 and the width d of the wing plates is equal to the distance b between the arch frames 7 of the adjacent trusses; the wing plate thickness e is determined according to the engineering general profile to carry out corresponding numerical simulation, so that the block collapsed in the upper fault broken zone can not fall, and the damage to constructors and equipment is avoided.

The utility model discloses a tunnel supporting construction's design with install and divide into the clearance rubble in implementing the engineering, confirm pterygoid lamina parameter, installation bow member, installation pterygoid lamina and spray concrete.

In the process of supporting the tunnel, firstly cleaning broken stones generated by excavation blasting; determining the width, thickness and spacing of wing plates 9 according to the size of the potential collapse body, and preparing the required wing plates; then installing an arch center 7, selecting a reasonable arch center distance according to the field working condition, and installing a wing plate 9 on the upper part of the arch center 7; and a foot locking anchor rod is arranged at the bottom end of the arch centering to keep the arch centering vertical. The arch frames 7 are connected by longitudinal steel bars 10. Finally, the concrete is sprayed into gaps among the wing plates, the arch center and the tunnel surrounding rock and gaps among the wing plates through the guide pipe holes 5 on the wing plates 9 and the arch center 7. Adopt pterygoid lamina 9 to jointly strut the novel supporting construction of tunnel country rock with bow member 7, reinforcing bar net, compare with traditional tunnel country rock support mode, the security of constructor and equipment will obtain very big improvement, has reduced because of the risk of tunnel hole top rock fall causing casualties and loss of property, has reduced the probability that traditional support mode took place the accident.

The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.

Claims

1. The arch support structure with the wing plates is characterized by comprising a steel bar net, wherein a plurality of arch frames (7) are fixed on the steel bar net, the wing plates (9) are fixed on each arch frame (7), the width of each wing plate (9) is larger than that of each arch frame (7), and the lower ends of all the arch frames (7) are fixedly connected with a bottom plate (8).

2. Arch support structure with wings according to claim 1, characterised in that diagonal support bars (15) are arranged between the wings (9) and the arch (7).

3. The arch support structure with wing plates as claimed in claim 1, wherein the multiple arches (7) are fixedly connected with transverse stirrups (11).

4. Arch support structure with wings according to claim 1, characterised in that the arch (7) and the wings (9) are fixed by means of fasteners.

5. The arch support structure with wing plates according to claim 1, characterized in that the wing plates (9) and the arch (7) are provided with conduit holes (5).

6. The arch support structure with wings of claim 1, wherein the reinforcing mesh comprises transverse reinforcing bars (6) and longitudinal reinforcing bars (10) which are orthogonally arranged, and the intersection points of the transverse reinforcing bars (6) and the longitudinal reinforcing bars (10) are welded and fixed.

7. Arch support structure with wings according to claim 1, characterised in that the arches (7) are uniformly arranged, the sum of the pitch and the width of the wings (9) being equal to the pitch of the arches (7).

8. Arch support structure with wings according to claim 1, characterised in that the wings (9) are made of rock wool panels, phenolic panels or foam glass panels.