CN219387919U - Novel arch centering quantitative buckling-preventing yielding energy consumption connecting device - Google Patents

Abstract

A new type of quantitative anti-buckling pressure-consumption connection device for an arch frame. The steel pipe is the restraining member of the anti-buckling energy-dissipating support inner core. The anti-buckling energy-dissipating support inner core passes through the inner cavity of the steel pipe, and mortar or concrete is poured between the anti-buckling energy-dissipating support inner core and the steel pipe. Bottom plate connection: the upper ends of one group of at least three compression core members are connected to the upper top plate, the lower ends of one group of at least three compression core members are connected to the middle part of the compression core casing; the upper ends of another group of at least three compression core members are connected to the middle part of the compression core casing, and the lower ends of another group of at least three compression core components are connected to the lower bottom plate. The utility model has the advantages of simple structure, convenient installation, and the timing and amount of pressure yielding can be controlled artificially.

Description

A new type of quantitative anti-buckling yielding pressure loss energy connection device for arch frames

technical field

The utility model relates to the technical field of underground engineering structures, in particular to a quantitative anti-buckling yielding pressure consumption energy connection device for an arch frame.

Background technique

During the construction of tunnels and underground projects, especially in deep underground spaces and complex strata, they often face disasters such as large deformation of surrounding rocks, rock bursts, landslides, and water and mud inrush.

In order to prevent or avoid these disasters, experts and scholars at home and abroad have done a lot of research and practice on the support of underground structures. The current arch forms mainly include: 1. U-shaped steel arch support, 2. constrained concrete arch support, 3. pressure anchor support, 4. pressure arch support, etc. Among them, the U-shaped steel arch support is the most commonly used passive support method in soft rock roadways. It directly acts on the surface of the surrounding rock in the roadway by providing passive radial support force to balance the deformation pressure of the surrounding rock and restrain the deformation of the surrounding rock. It is a support form with shrinkability, convenient construction, and good mechanical properties; but there are also the following problems: ①The circular cross-section concrete-filled steel tube arch frame has a small contact area with the surrounding rock surface, which is easy to cause stress concentration; ②The cost is relatively high; ③Lack of special underground installation equipment; A lot of support materials and support structures with yielding function have been manufactured, and the original rigid support structure has been improved to increase the shrinkability of the support. However, most of the yielding arch supports used in underground engineering now only consider the problem of deformation, and the yielding arch supports can only perform free yielding. There is no report on the energy consumption quantitative yielding devices of steel structures that can realize arch supports during work.

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides a novel arch quantitative anti-buckling yielding pressure loss energy connecting device with simple structure, convenient installation, and artificial controllable yielding timing and yielding amount, which is suitable for the realization of the yielding connecting device for arch support in various deep, soft rock and other difficult-to-support roadways, tunnels, and chamber groups.

The technical scheme that the utility model solves its technical problem adopts is:

A novel anti-buckling energy-consumption connection device for an arch frame, comprising a buckling-resistant energy-dissipating support inner core, a steel pipe, a pressure-yielding core casing, an upper top plate, and a lower bottom plate, the steel pipe is a restraint member of the buckling-resistant energy-dissipating support inner core, the buckling-resistant energy-dissipating support inner core passes through the inner cavity of the steel pipe, mortar or concrete is poured between the buckling-resistant energy-dissipating support inner core and the steel pipe to form a pressure-relieving core member, and the upper part of the pressure-relieving core sleeve is fixedly connected to the upper roof. The lower part of the pressure core casing is fixedly connected to the lower bottom plate, the upper end of one pressure core member is connected to the upper top plate, and the lower end is connected to the lower bottom plate; the upper end of one group of at least three pressure core members is connected to the upper top plate, and the lower end of a group of at least three pressure core members is connected to the middle of the pressure core sleeve; board connection.

Further, an upper connection device is provided in the middle of the upper top plate, and the upper connection device is respectively connected to the upper end of one pressure relief core member and a group of at least three pressure relief core members.

Preferably, the upper connection device is provided with a connection card slot, and the card slot is limitedly matched with the end of the compression core member including the buckling-resistant energy-dissipating support inner core.

Still further, a lower connection device is provided in the middle of the lower bottom plate, and the lower connection device is respectively connected to the lower end of one compression core member and the lower ends of another set of at least three compression core components.

Preferably, the lower connection device is provided with a connection card slot, and the card slot is limitedly matched with the end of the compression core member including the buckling-resistant energy-dissipating support inner core.

Furthermore, the pressure-releasing core casing is provided with a connecting device in the middle of the casing, and the connecting device in the middle of the casing is respectively connected to the lower ends of one group of at least three pressure-releasing core members and the upper ends of another group of at least three pressure-releasing core members.

Preferably, the cross-section of the pressure-releasing core casing is square, and there are four connection devices in the middle of the casing, which are respectively located on the four sides.

Preferably, the connecting device in the middle of the sleeve is provided with a card slot, and the card slot is limitedly matched with the end of the compression core member including the buckling-resistant energy-dissipating support inner core.

The upper top plate is fixedly connected with the upper arch structure plate supporting the main structure through upper connecting bolts, and the lower bottom plate is fixedly connected with the lower arch structure plate supporting the main structure through lower connecting bolts.

The beneficial effects of the utility model are mainly manifested in:

1) Simple structure, high precision, convenient and flexible installation, wide application;

2) The yielding timing and yielding amount are controllable, and quantitative yielding devices with different yielding modes, yielding points and yielding amounts can be selected according to the needs of specific projects;

3) When the pressure-yielding connection device is working, it can consume a certain amount of energy, especially under the action of dynamic loads such as earthquakes. The combination of the anti-buckling energy-dissipating support inner core and the steel pipe is a buckling-resistant structure. By pouring mortar or concrete between the buckling-resistant energy-dissipating support inner core and the steel pipe, a large anti-lateral rigidity and bearing capacity are provided to ensure that the full-section yield can be achieved when under pressure, and the effect of energy consumption can be achieved through yield hysteresis. Ensuring the safe construction of underground projects can reduce casualties and economic losses caused by disasters;

4) Prefabrication is used to greatly reduce the construction cost and construction period, and in the later stage of operation, after the structure is partially damaged, partial replacement can be used. The replacement process is convenient and will not cause a major impact on the normal construction of the underground project.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of a novel arch quantitative anti-buckling yielding pressure loss energy connection device;

Fig. 2 is an exploded diagram of a novel arch quantitative anti-buckling yielding pressure loss energy connection device;

Fig. 3 is an A-A sectional view of a novel arch quantitative anti-buckling yielding pressure loss energy connection device;

Fig. 4 is a schematic diagram of the anti-buckling energy-dissipating support of a novel arch quantitative anti-buckling yielding pressure energy-dissipating connection device.

In the figure: 1 is the anti-buckling energy-dissipating support inner core, 12 is the steel pipe, 2 is the yielding core casing, 21 is the connecting device in the middle of the casing, 3 is the upper roof, 31 is the upper connecting device, 4 is the lower floor, 41 is the lower connecting device, 5 is the upper connecting bolt, 6 is the lower connecting bolt, 7 is the upper arch structure plate supporting the main structure, and 8 is the lower arch structure supporting the main structure.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Referring to Figures 1 to 4, a new type of arch quantitative anti-buckling yielding pressure energy consumption connection device includes buckling-resistant energy-dissipating support inner core 1, steel pipe 12, pressure yielding core casing 2, casing middle connection device 21, upper top plate 3, upper connection device 31, lower bottom plate 4, lower connection device 41, upper connecting bolts 5, lower connecting bolts 6, upper arch structure plate 7 supporting the main structure, and lower arch structure 8 supporting the main structure.

The steel pipe 12 is the constraining member of the buckling-resistant energy-dissipating support inner core 1. The buckling-resistant energy-dissipating supporting inner core 1 passes through the inner cavity of the steel pipe 12, and mortar or concrete is poured between the buckling-resistant energy-dissipating supporting inner core and the steel pipe to connect and fix it to form a yielding core member. The lower end is connected to the lower bottom plate 4; the upper ends of one group of at least three compression core members are connected to the upper top plate 3, the lower ends of one group of at least three compression core members are connected to the middle part of the compression core casing 2;

The combination of the anti-buckling energy-dissipating support core 1 and the steel pipe 12 is a yielding core member, which is located at the core of the entire device and consists of nine supporting inner cores and nine steel pipes; the anti-buckling energy-dissipating supporting core 1 is made of high-quality mild steel or Q235 or high-performance steel;

The steel pipe 12 is the constraining member of the buckling-resistant energy-dissipating support inner core 1. By pouring mortar or concrete between the buckling-resistant energy-dissipating supporting inner core 1 and the steel pipe 12, it is ensured that the full-section yield state can be achieved under pressure, and the effect of energy consumption is achieved through yield hysteresis, and the role of a structural "fuse" is achieved; the steel pipe 12 is made of high-quality Q390 steel;

The pressure relief core casing 2 is located at the periphery of the combination of the anti-buckling energy-dissipating support inner core 1 and the steel pipe 12, and can play a role of secondary energy consumption; the pressure relief core casing 2 is made of high-quality Q390 steel;

The casing middle connection device 21 is located in the middle of the four sides of the yielding core casing 2, and the slots on the device are mainly used to limit the position of the anti-buckling energy-dissipating support inner core 1; the casing middle connecting device 21 is made of high-quality Q390 steel, and is integrated with the pressure-releasing core casing 2, and the slots on the device are set corresponding to the shape of the anti-buckling energy-dissipating support inner core 1;

The upper top plate 3 and the lower bottom plate 4 are located at both ends of the pressure relief core casing 2. While closing the pressure relief core casing 2, the radial movement of the anti-buckling energy dissipation support inner core 1 is restricted by the upper connecting device 31 on the upper top plate 3 and the lower connection device 41 on the lower bottom plate 4. Solder connection;

The upper connecting device 31 and the lower connecting device 41 are respectively located at the exact center of the upper top plate 3 and the lower bottom plate 4; the upper connecting device 31 and the lower connecting device 41 are both made of high-quality Q390 steel, and are integrated with the upper top plate 3 and the lower bottom plate 4, and the slots on the devices are set corresponding to the shape of the buckling-resistant energy-dissipating support inner core 1;

The upper connecting bolts 5 are mainly used to connect the upper roof plate 3 and the upper arch structure plate 7 of the supporting main structure; the lower connecting bolts 6 are mainly used to connect the lower bottom plate 4 and the lower arch structural plate 8 of the supporting main structure; preferably, the upper connecting bolts 5 and the lower connecting bolts 6 are light-weight and high-strength tension bolts, and a total of eight tension bolts are arranged to prevent displacement and damage of the device under dynamic loads such as earthquakes; the upper arch of the supporting main structure The structural plate 7 and the lower arch structural plate 8 supporting the main structure are made of high-quality Q390 steel.

The manufacturing method of the novel arch quantitative anti-buckling let pressure loss energy connection device of this embodiment includes the following steps:

(1) Reasonable selection of materials used in quantitatively allowing pressure loss energy connection devices;

(2) Process each component of the yielding connection device, the anti-buckling energy-dissipating support inner core, the steel pipe and the yielding core casing are subjected to precise machining, and the surface should be treated with rust removal and sandblasting to avoid damage due to strength reduction due to corrosion and make the surface more frictional;

(3) The pressure core casing is welded to the upper top plate and the lower bottom plate, and the connection between the pressure core casing and the middle part of the casing is formed by cutting or welding.

(4) The upper roof and the upper connecting device are connected as a whole by cutting process or welding, and the centroid of the section of the upper connecting device and the centroid of the surface of the upper roof are on the same vertical line,

(5) The lower bottom plate and the lower connecting device are connected as a whole by cutting process or welding, and the centroid of the section of the lower connecting device and the centroid of the surface of the lower bottom plate are on the same vertical line.

(6) The cross-sectional shape of the lower connection device is the same as that of the upper connection device, and the grooves on the two connection devices are formed by cutting process;

(7) The upper connecting bolts are arranged on the four corners of the upper roof plate and the upper arch structural plate supporting the main structure, and the two are tightly connected by using pull bolts to improve the integrity of the structure;

(8) The lower connecting bolts are arranged on the four corners of the lower bottom plate and the lower arch structural plate supporting the main structure, and the two are tightly connected by the pull bolts to improve the integrity of the structure.

The scheme of this embodiment has simple structure, high precision, convenient and flexible installation, and wide applicability; the yielding timing and the yielding amount are controllable, and quantitative yielding devices with different yielding modes, yielding points and yielding amounts can be selected according to the needs of specific projects; when the yielding connection device is working, a certain amount of energy can be consumed, especially under the action of dynamic loads such as earthquakes. Provide a large anti-lateral stiffness and bearing capacity to ensure that the full cross-section yield state can be achieved when under pressure, and achieve the effect of energy consumption through yield hysteresis, achieve the effect of structural "fuse", can protect the support structure, thereby ensuring the safe construction of underground projects, and can reduce casualties and economic losses caused by disasters; the use of prefabricated assembly greatly reduces construction costs and construction period, and in the later operation, after the structure is partially damaged, local replacement can be used. The replacement process is convenient and will not have a great impact on the normal construction of underground projects.

The content described in the embodiments of this specification is only an enumeration of the implementation forms of the utility model concept, and is for illustration purposes only. The protection scope of the present utility model should not be regarded as being limited to the specific form stated in this embodiment, and the protection scope of the present utility model also extends to the equivalent technical means that those of ordinary skill in the art can think of according to the concept of the utility model.

Claims (9)

1. A novel arch frame quantitative anti-buckling energy-consumption connection device, characterized in that the connection device includes an anti-buckling energy-dissipating support inner core, a steel pipe, a pressure-yielding core casing, an upper top plate and a lower floor, the steel pipe is a restraint member of the buckling-resistant energy-dissipating support inner core, the buckling-resistant energy-dissipating supporting inner core passes through the inner cavity of the steel pipe, and mortar or concrete is poured between the buckling-resistant energy-dissipating supporting inner core and the steel pipe to form a pressure-yielding core member, the upper part of the pressure-yielding core casing It is fixedly connected with the upper top plate, the lower part of the pressure relief core sleeve is fixedly connected with the lower bottom plate, the upper end of one pressure relief core member is connected with the upper top plate, and the lower end is connected with the lower bottom plate; the upper end of a group of at least three pressure relief core members is connected with the upper top plate, the lower end of a group of at least three pressure relief core members is connected with the middle part of the pressure relief core sleeve; The lower end of the core member is connected to the lower floor. 2. A new type of arch quantitative anti-buckling yielding pressure energy connection device as claimed in claim 1, characterized in that, the middle part of the upper top plate is provided with an upper connecting device, and the upper connecting device is respectively connected with an upper end of a yielding core member and a group of at least three upper ends of yielding core members. 3. A novel quantitative anti-buckling pressure-dissipating energy-dissipating connection device for arches as claimed in claim 2, characterized in that the upper connection device is provided with a connecting slot, and the slot is in limited fit with the end of the buckling-resistant energy-dissipating support inner core of the compression-yielding core member. 4. A new type of quantitative anti-buckling yielding pressure energy connection device for arches according to any one of claims 1 to 3, characterized in that a lower connecting device is provided in the middle of the lower bottom plate, and the lower connecting devices are respectively connected to the lower end of one yielding core member and the lower ends of another group of at least three yielding core members. 5. A novel quantitative anti-buckling pressure-dissipating energy-dissipating connection device for arches as claimed in claim 4, characterized in that the lower connecting device is provided with a connecting slot, and the slot is fitted with the end of the buckling-resistant energy-dissipating support inner core of the compression-yielding core member. 6. A new type of arch quantitative anti-buckling yielding pressure consumption energy connection device according to any one of claims 1 to 3, characterized in that the yielding core casing is provided with a casing middle connecting device, and the casing middle connecting device is respectively connected to the lower ends of one group of at least three yielding core members and the upper end of another group of at least three yielding core members. 7. A new type of quantitative anti-buckling yielding pressure consumption energy connection device for arches according to claim 6, characterized in that the cross-section of the pressure yielding core casing is square, and there are four connecting devices in the middle of the casing, which are respectively located on the four sides. 8. A novel quantitative anti-buckling pressure-dissipating energy connection device for an arch frame as claimed in claim 7, characterized in that the connecting device in the middle of the casing is provided with a card slot, and the card slot cooperates with the end of the buckling-resistant energy-dissipating support inner core of the pressure-releasing core member. 9. A new type of anti-buckling anti-buckling pressure loss energy connection device for an arch according to any one of claims 1 to 3, wherein the upper roof plate is fixedly connected to the upper arch structural plate supporting the main structure through upper connecting bolts, and the lower bottom plate is fixedly connected to the lower arch structural plate supporting the main structure through lower connecting bolts.