阅读说明：本技术 一种压力型减震消能预应力锚杆结构及构造方法 (Pressure type shock-absorbing energy-dissipating pre-stressed anchor rod structure and construction method ) 是由 姚裕春 叶世斌 袁碧玉 刘洋 于 2019-12-24 设计创作，主要内容包括：本发明公开了一种压力型减震消能预应力锚杆结构及构造方法,该锚杆结构包括锚杆本体,所述锚杆本体包括锚固段和自由段,所述锚固段用于连接于锚杆孔的注浆体中,所述自由段四周具有空隙,所述自由段张拉并连接消能装置,所述消能装置能够带动所述自由段沿所述自由段长度方向往复运动,所述消能装置用于锚固于待加固结构体上。具有操作简单、锚杆结构预应力与所述支撑部件施工不影响,经济、环保和利于推广等特点。(The invention discloses a pressure type shock-absorbing energy-dissipating prestressed anchor rod structure and a construction method thereof. The anchor rod structure prestress support device has the characteristics of simplicity in operation, no influence on anchor rod structure prestress and support component construction, economy, environmental protection, contribution to popularization and the like.)

1. The utility model provides a pressure type shock attenuation energy dissipation prestressed anchorage pole structure, includes stock body (1), its characterized in that, stock body (1) includes anchor section (11) and free section (12), anchor section (11) are arranged in connecting in grouting body (3) of stock hole (A), free section (12) have the space all around, free section (12) stretch-draw is connected energy dissipater (4), energy dissipater (4) can drive free section (12) are followed free section (12) length direction reciprocating motion, energy dissipater (4) are used for anchoring in treating on the reinforcement structure.

2. The prestressed anchor structure of claim 1, wherein said free portion (12) is housed in a closed sleeve (2), said closed sleeve (2) being disposed in said anchor hole (A).

3. The prestressed anchorage structure of claim 2, wherein the energy dissipator (4) is provided in an excavated hole (B).

4. The prestressed anchorage structure of claim 3, wherein a mortar closure (5) is filled between the outer wall of the energy dissipator (4) and the inner wall of the excavated hole (B).

5. The prestressed anchorage structure of claim 4, wherein the energy dissipator (4) is connected to a support member (6), the support member (6) being connected to the structure to be reinforced.

6. The prestressed anchor structure of any one of claims 1-5, wherein said energy dissipator (4) comprises an elastic member (41) and a protective sleeve (45), the axial direction of said protective sleeve (45) is parallel to the length direction of said free section (12), said elastic member (41) is disposed inside said protective sleeve (45) and can elastically expand and contract along the axial direction of said protective sleeve (45), said protective sleeve (45) is used for connecting to said structure to be reinforced, one end of the expansion direction of said elastic member (41) is connected to said free section (12), and the other end is used for connecting to said structure to be reinforced.

7. The prestressed anchor structure of claim 6, wherein said elastic member (41) is a spring.

8. The prestressed anchorage structure of claim 6, wherein the energy dissipater (4) further comprises an inner baffle (42) and an outer baffle (43), the inner baffle (42) and the outer baffle (43) are respectively connected with two ends of the elastic component (41) in the stretching direction, the inner side baffle (42) is positioned at one side of the anchor rod hole (A), the outer side baffle (43) is positioned at one side of the structure body to be reinforced, the inner baffle (42) is positioned at the end part of the protective sleeve (45), the outer baffle (43) is arranged in the protective sleeve (45) in a sliding way, the free section (12) passes through the inside baffle (42) and the outside baffle (43) and is connected to the outside baffle (43), the inner baffle (42) is anchored to the structure to be reinforced by means of a connecting element (44).

9. The prestressed anchor structure of claim 6, wherein the energy dissipater (4) further comprises an inner baffle (42) and an outer baffle (43), the inner baffle (42) and the outer baffle (43) are respectively connected to two ends of the elastic member (41) in the expansion direction, the inner baffle (42) is located on the side of the anchor hole (A), the outer baffle (43) is located on the side of the structure to be reinforced, the outer baffle (43) is anchored to the structure to be reinforced through a connecting member (44), the inner baffle (42) is slidably arranged in the protective sleeve (45), the free section (12) is connected to the inner baffle (42), and the length of the protective sleeve (45) satisfies the maximum elastic elongation of the elastic member (41).

10. A method for constructing a pressure type shock-absorbing and energy-dissipating prestressed anchor structure recited in claim 8, comprising the steps of:

A. forming the anchor rod hole (A) on the structure body to be reinforced;

B. a closed sleeve (2) is sleeved outside the free section (12), and the anchor rod body (1) and the closed sleeve (2) are arranged in the anchor rod hole (A);

C. grouting the anchor rod hole (A), forming a grouting body (3) in the anchoring section (11), and anchoring the anchor rod hole (A);

D. forming an excavated hole (B) in the structure to be reinforced on the basis of the anchor rod hole (A);

E. the end of the free section (12) penetrates through the inner side baffle (42) and the outer side baffle (43), the anchor rod body (1) is tensioned, prestress is applied to the free section (12), and the free section (12) is connected to the outer side baffle (43);

F. constructing a mortar closing body (5) in a hole between the outer wall of the protective sleeve (45) and the inner wall of the excavation hole (B);

G. a construction support member (6), the support member (6) being connected to the connecting member (44) and the structure to be reinforced.

Technical Field

The invention relates to the field of geotechnical engineering, in particular to a pressure type shock-absorbing energy-dissipating pre-stressed anchor rod structure and a construction method.

Background

The high-intensity seismic areas are distributed in large quantities in China, the investment of slope reinforcement engineering for excavation in the high-intensity seismic areas is high, and the reinforcement engineering is easy to damage under the action of earthquakes. The anchor rod is widely applied to slope reinforcement engineering, and the stress mechanism of the prestressed anchor rod is more suitable for engineering slope reinforcement. How to realize the shock absorption and energy dissipation effects of the prestressed anchor rod in a high-intensity earthquake area, thereby avoiding the problem of instability caused by overlarge instantaneous stress of the anchor rod when an earthquake occurs, being capable of enduring the repeated action of the earthquake and having good economical efficiency.

Therefore, the prestressed anchor rod structure and the construction method which have the advantages of good energy dissipation effect, convenience in construction, capability of withstanding repeated earthquake action and good economy have great significance.

Disclosure of Invention

The invention aims to: aiming at the problems in the prior art, a pressure type shock absorption and energy dissipation pre-stressed anchor rod structure and a construction method are provided.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a pressure type shock attenuation energy dissipation prestressed anchorage pole structure, includes the stock body, the stock body includes anchor section and free section, the anchor section is arranged in connecting in the slip casting body in anchor rod hole, the free section has the space all around, free section stretch-draw is connected the energy absorber, the energy absorber can drive the free section is followed free section length direction reciprocating motion, the energy absorber is used for the anchor in treating on the reinforced structure body.

The structure to be reinforced comprises a side slope, a tunnel wall or a side wall.

By adopting the pressure type shock-absorbing and energy-dissipating prestressed anchor rod structure, the energy dissipating device is arranged between the outer side of the free section of the anchor rod body and the structure body to be reinforced, the free section and the energy dissipating device form prestress tension fixed connection, when an earthquake occurs, the energy dissipating device shrinks, deforms and dissipates energy, and the energy dissipating device deforms and recovers after the earthquake, so that the repeated shock-proof and energy-dissipating effect is achieved, the anchor rod body is not directly connected with the structure body to be reinforced after being prestressed, and is fixedly connected with the structure body to be reinforced through the energy dissipating device, so that the prestressed anchor rod body is not influenced by subsequent construction, and the force of the anchor rod body is transmitted to the structure body to be reinforced; the anchoring section of the anchor rod body provides anchoring force, the free section provides prestress, and the gap isolates the free section from the grouting body, so that the free section can generate prestress when being tensioned; the energy dissipation device plays an energy dissipation role when an earthquake occurs and is used as a prestress locking structure of the anchor rod body; the anchor rod is simple in structure, convenient to use and good in effect.

Preferably, the free section is sleeved in a closed sleeve, and the closed sleeve is arranged in the anchor rod hole.

Further preferably, the closure sleeve is a steel sleeve or a plastic sleeve.

Further preferably, the dissipaters are located in the excavated holes.

Further preferably, a mortar closing body is filled between the energy dissipater outer wall and the excavation hole inner wall.

Further preferably, the dissipaters are connected to support members connected to the structure to be reinforced.

Further preferably, the support member is a frame grid structure.

Further preferably, the support member is a reinforced concrete structure.

Preferably, the energy dissipater comprises an elastic component and a protective sleeve, the axial direction of the protective sleeve is parallel to the length direction of the free section, the elastic component is arranged in the protective sleeve and can elastically stretch along the axial direction of the protective sleeve, the protective sleeve is used for being connected to the structure to be reinforced, one end of the elastic component in the stretching direction is connected to the free section, and the other end of the elastic component in the stretching direction is used for being connected to the structure to be reinforced.

Further preferably, the elastic member is a spring.

Further preferably, the energy dissipater further comprises an inner baffle and an outer baffle, the inner baffle and the outer baffle are respectively connected to two ends of the elastic component in the stretching direction, the inner baffle is located on one side of the anchor rod hole, the outer baffle is located on one side of the structure to be reinforced, the inner baffle is located at the end of the protective sleeve, the outer baffle is slidably arranged in the protective sleeve, the free section penetrates through the inner baffle and the outer baffle and is connected to the outer baffle, and the inner baffle is anchored on the structure to be reinforced through a connecting component.

With this arrangement, the elastic part of the energy dissipater is arranged in the protective sleeve and can move freely to deform and recover, so as to play a role in damping and dissipating energy, the inner baffle and the outer baffle are used for fixing the free section and the connecting part, and the connecting part is used for connecting the support part, so that the force of the anchor rod body is transmitted to the support part.

Further preferably, the energy dissipater further comprises an inner baffle and an outer baffle, the inner baffle and the outer baffle are respectively connected to two ends of the elastic component in the stretching direction, the inner baffle is located on one side of the anchor rod hole, the outer baffle is located on one side of the structure to be reinforced, the outer baffle is anchored on the structure to be reinforced through a connecting component, the inner baffle is slidably arranged in the protective sleeve, the free section is connected to the inner baffle, and the length of the protective sleeve meets the maximum elastic extension of the elastic component.

Further preferably, the inside barrier is a steel plate.

Further preferably, the outer barrier is a steel plate.

Further preferably, the connecting member is an anchoring bar.

Further preferably, the protective sleeve is a steel sleeve.

The invention also provides a construction method of the pressure type shock absorption and energy dissipation pre-stressed anchor rod structure, which comprises the following steps:

A. forming the anchor rod hole on the structure body to be reinforced;

B. a closed sleeve is sleeved outside the free section, and the anchor rod body and the closed sleeve are arranged in the anchor rod hole;

C. grouting the anchor rod hole, forming grouting body at the anchoring section, and anchoring the anchor rod hole;

D. forming an excavated hole in the structure to be reinforced on the basis of the anchor rod hole;

E. the end part of the free section penetrates through the inner side baffle and the outer side baffle, the anchor rod body is tensioned, prestress is applied to the free section, and the free section is connected to the outer side baffle;

F. constructing a mortar closing body in a hole between the outer wall of the protective sleeve and the inner wall of the excavation hole;

G. and the construction supporting component is connected to the connecting component and the structure body to be reinforced.

By adopting the construction method of the pressure type shock-absorbing and energy-dissipating prestressed anchor rod structure, the energy dissipation device is arranged between the outer side of the free section of the anchor rod body and the support component, the free section and the energy dissipation device form prestressed tension fixed connection, when an earthquake occurs, the elastic component of the energy dissipation device shrinks, deforms and dissipates energy, the elastic component deforms and recovers after the earthquake, and the repeated anti-seismic and energy-dissipating effect is achieved, the anchor rod body is not directly connected with the support component after being prestressed, and is fixedly connected with the support component through the connecting component of the energy dissipation device, so that the support component does not influence the prestressed anchor rod body during construction; the anchoring section of the anchor rod body provides anchoring force, the free section provides prestress, and the closed sleeve isolates the free section from the grouting body, so that the free section can generate prestress when being tensioned; the energy dissipater plays an energy dissipation role when an earthquake occurs and is used as a prestress locking structure of the anchor rod body, the elastic part of the energy dissipater is arranged in the protective sleeve and can freely move to generate deformation and deformation recovery so as to play a role in shock absorption and energy dissipation, the inner side baffle and the outer side baffle are used for fixing the free section and the connecting part, and the connecting part is used for connecting the supporting part so as to transmit the force of the anchor rod body to the supporting part; the method has the characteristics of simple operation, no influence of the prestress of the anchor rod structure on the construction of the supporting part, economy, environmental protection, contribution to popularization and the like.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. according to the pressure type shock-absorbing and energy-dissipating prestressed anchor rod structure, the energy dissipation device is arranged between the outer side of the free section of the anchor rod body and the structure body to be reinforced, the free section and the energy dissipation device form prestress tension fixed connection, when an earthquake occurs, the energy dissipation device shrinks, deforms and dissipates energy, the energy dissipation device deforms and recovers after the earthquake, the repeated shock-resistant and energy dissipation effect is achieved, the anchor rod body is not directly connected with the structure body to be reinforced after being prestressed, and the energy dissipation device is fixedly connected with the structure body to be reinforced, so that the anchor rod body with prestress is not influenced in subsequent construction, and the force of the anchor rod body is transmitted to the structure body to be reinforced; the anchoring section of the anchor rod body provides anchoring force, the free section provides prestress, and the gap isolates the free section from the grouting body, so that the free section can generate prestress when being tensioned; the energy dissipation device plays an energy dissipation role when an earthquake occurs and is used as a prestress locking structure of the anchor rod body; the anchor rod has simple structure, convenient use and good effect;

2. according to the pressure type shock-absorbing and energy-dissipating prestressed anchor rod structure, the elastic part of the energy-dissipating device is arranged in the protective sleeve and can freely move to generate deformation and deformation recovery, so that the shock-absorbing and energy-dissipating effects are achieved, the inner side baffle and the outer side baffle are used for fixing the free section and the connecting part, and the connecting part is used for connecting the supporting part, so that the force of the anchor rod body is transmitted to the supporting part;

3. according to the construction method of the pressure type shock-absorbing and energy-dissipating pre-stressed anchor rod structure, the energy dissipation device is arranged between the outer side of the free section of the anchor rod body and the supporting component, the free section and the energy dissipation device form pre-stress tension fixed connection, when an earthquake occurs, the elastic component of the energy dissipation device shrinks, deforms and dissipates energy, the elastic component deforms and recovers after the earthquake, and the repeated anti-seismic and energy-dissipating effect is achieved, the anchor rod body is not directly connected with the supporting component after being prestressed, and is fixedly connected with the supporting component through the connecting component of the energy dissipation device, so that the supporting component does not influence the prestressed anchor rod body during construction; the anchoring section of the anchor rod body provides anchoring force, the free section provides prestress, and the closed sleeve isolates the free section from the grouting body, so that the free section can generate prestress when being tensioned; the energy dissipater plays an energy dissipation role when an earthquake occurs and is used as a prestress locking structure of the anchor rod body, the elastic part of the energy dissipater is arranged in the protective sleeve and can freely move to generate deformation and deformation recovery so as to play a role in shock absorption and energy dissipation, the inner side baffle and the outer side baffle are used for fixing the free section and the connecting part, and the connecting part is used for connecting the supporting part so as to transmit the force of the anchor rod body to the supporting part; the method has the characteristics of simple operation, no influence of the prestress of the anchor rod structure on the construction of the supporting part, economy, environmental protection, contribution to popularization and the like.

Drawings

FIG. 1 is a schematic structural diagram of a pressure type shock-absorbing and energy-dissipating prestressed anchor structure according to the present invention;

FIG. 2 is an enlarged partial schematic view of FIG. 1;

fig. 3 is a schematic cross-sectional view C-C of fig. 2.

Icon: 1-anchor rod body, 11-anchoring section, 12-free section, 2-closed sleeve, 3-grouting body, 4-energy dissipation device, 41-elastic component, 42-inner baffle, 43-outer baffle, 44-connecting component, 45-protective sleeve, 5-mortar closing body, 6-supporting component, A-anchor rod hole and B-excavating hole.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.