Anti-rockfall, anti-slip and energy-dissipation row pile combined structure

Abstract

The utility model relates to an anti-rockfall slide-resistant energy-dissipation row pile combined structure which comprises front-row slide-resistant piles, a rear-row sheet-pile wall, a damping roadbed structure and a buffer shed roof structure. The front-row slide-resistant piles are longitudinally arranged on the side far from bedrock, and the rear-row sheet-pile wall is longitudinally arranged close to the bedrock on the side near the bedrock; upper elastic damping cross beams and lower elastic damping cross beams are arranged on the side faces of the front-row anti-slide piles and the side faces of the rear-row pile-slab wall correspondingly. Transverse elastic dampers are connected between the upper elastic damping cross beams on the two sides and between the lower elastic damping cross beams on the two sides correspondingly. The damping roadbed structure is located above the lower elastic damping cross beam, and the buffer shed roof structure is located above the upper elastic damping cross beam. The elastic damping cross beams are arranged on the pile tops and the anchoring sections of the front row pile and the rear row pile, cantilever stress of the rear row pile-slab wall is improved into simply supported beam stress, the bending moment of the pile body of the rear row pile and top displacement are greatly reduced, and multiple functions of rock falling prevention, sliding resistance and energy dissipation are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to railway tunnel engineering technical field, concretely relates to a kind of anti-rockfall slide energy dissipation pile arrangement combination structure. BACKGROUND

[0002] Two prominent problems are faced by tunnel entrance and exit in earthquake-prone areas: (1) dangerous rockfall is distributed above the tunnel roof, which affects the safety of the tunnel portal and requires appropriate measures for governance. (2) The tunnel entrance section is located at the junction of the accumulation body and the bedrock, and the stability of the slope on both sides affects the safety of the portal, which requires reinforcement and support. For the governance of such complex geological conditions of tunnel portal, the slope resistance and reinforcement and dangerous rockfall protection need to be considered comprehensively to ensure the safety of the line operation.

[0003] Currently, pile-slab wall structure is commonly used for pre-reinforcement of the slope at the tunnel portal, and shed-dome structure is used to prevent dangerous rockfall at the portal. However, in earthquake-prone areas, the maximum bending moment often occurs near the anchor point of the pile-slab wall structure, and the longer the cantilever section, the greater the bending moment. Under the action of earthquake, the slope surface is amplified, and the displacement at the top of the pile is too large, which easily squeezes the shed-dome structure. Multiple rows of pile structures are usually connected by fixed beams, and stress concentration and cracking often occur at the beam connections. In high and steep mountainous areas, the single pile diameter and pile spacing required to meet the seismic bearing capacity demand of this structure are large, and the overall construction amount is large.

[0004] Therefore, it is necessary to propose new measures to overcome the above-mentioned defects. SUMMARY

[0005] The purpose of the utility model is to provide an anti-rockfall slide energy dissipation pile arrangement combination structure to solve the problems existing in the current governance of tunnel portals by pile-slab wall structure.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] An anti-rockfall slide energy dissipation pile arrangement combination structure, the structure includes front row of anti-slide piles, rear row of pile-slab walls, shock-absorbing roadbed structures, and buffer shed roof structures;

[0008] The front row of anti-slide piles is longitudinally arranged on the far bedrock side, and the rear row of pile-slab walls is longitudinally arranged close to the bedrock on the near bedrock side;

[0009] The front row of anti-slide piles and the side faces of the rear row of pile-slab walls are provided with upper and lower elastic shock-absorbing cross beams, and transverse elastic shock absorbers are connected between the upper elastic shock-absorbing cross beams on both sides and between the lower elastic shock-absorbing cross beams on both sides;

[0010] The shock-absorbing roadbed structures are located above the lower elastic shock-absorbing cross beams, and the buffer shed roof structures are located above the upper elastic shock-absorbing cross beams.

[0011] Further, the buffer shed roof structure comprises shed panels and elastic supports, and the lateral ends of the shed panels are supported on the top of the front row of anti-slide piles and the top of the rear row of pile wall through the elastic supports.

[0012] Further, the top of the upper elastic shock-absorbing crossbeam is provided with vertical elastic shock absorbers supported below the shed panels.

[0013] Further, the shock-absorbing roadbed structure comprises a roadbed base plate and an isolation support, and the lateral ends of the roadbed base plate are supported on the top of the lower elastic shock-absorbing crossbeam through the isolation support.

[0014] Further, a lateral damper is arranged between the roadbed base plate and the front row of anti-slide piles.

[0015] Further, the near-bedrock side of the roadbed base plate is provided with a buckling-restrained brace, one end of which is connected to the roadbed base plate and the other end of which is connected to the top of the lower elastic shock-absorbing crossbeam.

[0016] Further, the rear row of pile wall comprises a rear row of piles and a shock-absorbing retaining plate.

[0017] The rear row of piles is laterally opposite to the front row of anti-slide piles, and the upper elastic shock-absorbing crossbeam and the lower elastic shock-absorbing crossbeam are arranged on the side of the rear row of piles.

[0018] The shock-absorbing retaining plate is longitudinally connected between adjacent rear row of piles.

[0019] Further, the shock-absorbing retaining plate comprises a retaining plate body and a flexible buffer layer, and the flexible buffer layer is attached to the near-bedrock side of the retaining plate body.

[0020] Further, the top of the rear row of pile wall is higher than the top of the front row of anti-slide piles, and the buffer shed roof structure is downwardly inclined from the near-bedrock side to the far-bedrock side.

[0021] Further, the bedrock top of the near-bedrock side of the rear row of pile wall is provided with a sunken rockfall chute lower than the top of the rear row of pile wall.

[0022] Compared with the prior art, the utility model has the beneficial effects as follows:

[0023] 1) The utility model discloses an elastic shock-absorbing crossbeam arranged on the top of the front and rear rows of piles and the anchoring section, changes cantilever force of the rear row of pile wall into simple beam force, greatly reduces the bending moment of the rear row of piles and the displacement of the top, and reduces the vibration of the structure along the sliding direction of the slope under the action of the earthquake, thereby guaranteeing the stability of the rear row of anti-slide piles.

[0024] 2) The utility model discloses right side setting rockfall chute can effectively block right side sliding soil body and rockfall, adopts the buffer shed face setting in upper shock absorption crossbeam, can effectively eliminate the impact energy of high position rockfall, guarantees the security of roadbed structure.

[0025] 3) The utility model discloses the combination of anti -slip structure and rockfall prevention structure, whole structure is simple, convenient construction, under the premise of guaranteeing the bearing capacity of pile body, can reduce the design pile diameter, further enlarges the interval of pile, and the whole construction quantity is small, simultaneously all shock absorption parts can replace, under the action of earthquake, first plays the energy dissipation of shock absorption part, guarantees the stability and deformation of row pile main part structure, has very good economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, can also obtain the drawing of other embodiments according to these drawings.

[0027] Figure 1 It is the side view of the utility model.

[0028] Figure 2 It is the plane view of the utility model.

[0029] Figure 3 It is the front view of the utility model.

[0030] Marked in the drawing as:

[0031] 1-front row anti -slip pile, 2-back row pile board wall, 3-shock absorption soil retaining plate, 4-lower elastic shock absorption crossbeam, 5-transverse elastic shock absorber, 6-buckling-restrained brace, 7-roadbed foundation plate, 8-isolation bearing, 9-transverse damper, 10-upper elastic shock absorption crossbeam, 11-elastic support, 12-vertical elastic shock absorber, 13-shed face plate, 14-rockfall chute. DETAILED DESCRIPTION

[0032] In order to facilitate understanding the utility model, the following will be more comprehensive to the utility model with reference to relevant drawings.Described in the drawing the preferred implementation of the utility model.However, the utility model can be realized in many different forms, and is not limited to the implementation described herein.Conversely, the purpose of providing these implementation is to make the disclosure of the utility model more thorough and comprehensive.

[0033] In the description of the utility model, it needs to be understood that the terms "upper", "lower", "front", "rear", "top", "bottom", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0034] In the description of the utility model, it needs to be understood that the terms "connection", "setting" and the like should be understood broadly unless otherwise explicitly specified and limited, for example, can be fixedly connected, set, or detachably connected, set, or integrally connected, set.

[0035] In the specific implementation, the Figure 1 The left-to-right direction is defined as the transverse direction, and the direction perpendicular thereto is defined as the longitudinal direction, i.e., the line direction.

[0036] The utility model provides a kind of anti-rockslide slide-preventing energy-dissipation pile combination structure, it is set in bedrock outside and close to bedrock construction, the upper part of bedrock is sliding body, it is simple in structure, convenient to construct, can effectively control the maximum stress and deformation of structure under earthquake action.

[0037] As Figure 1 , the structure includes front row anti-slide pile 1, rear row pile-slab wall 2, shock-absorbing subgrade structure and buffer shed roof structure.

[0038] The front row anti-slide pile 1 is longitudinally arranged on the side far from the bedrock, and the rear row pile-slab wall 2 is longitudinally arranged close to the bedrock on the side near the bedrock. The side surface of the front row anti-slide pile 1 and the side surface of the rear row pile-slab wall 2 are both provided with upper elastic shock-absorbing cross beams 10 and lower elastic shock-absorbing cross beams 4. Transverse elastic shock absorbers 5 are connected between the upper elastic shock-absorbing cross beams 10 on both sides and between the lower elastic shock-absorbing cross beams 4 on both sides, and are fixed by bolts. The shock-absorbing subgrade structure is located above the lower elastic shock-absorbing cross beams 4, and the buffer shed roof structure is located above the upper elastic shock-absorbing cross beams 10. A longitudinal driving lane is enclosed between the front row anti-slide pile 1, the rear row pile-slab wall 2, the upper elastic shock-absorbing cross beams 10 and the lower elastic shock-absorbing cross beams 4. The lower elastic shock-absorbing cross beams 4 are respectively arranged at the anchoring points of the front row anti-slide pile 1 and the rear row pile-slab wall 2, and correspond to the bottom boundary of the sliding body in the transverse direction.

[0039] The buffer shed roof structure comprises shed panels 13 and elastic supports 11, the transverse ends of the shed panels 13 are supported on the top of the front row of anti-slide piles 1 and the top of the rear row of pile wall 2 through the elastic supports 11, the elastic supports 11 provide vertical support for the shed panels 13 and effectively reduce the vibration stress of the ends of the panels under the impact of falling rocks. The top of the rear row of pile wall 2 is higher than the top of the front row of anti-slide piles 1, and the buffer shed roof structure is inclined downward from the near-bedrock side to the far-bedrock side.

[0040] In other embodiments, the top of the upper elastic shock-absorbing beam 10 is also provided with vertical elastic shock absorbers 12 supported below the shed panels 13. The vertical elastic shock absorbers 12 reduce the vibration energy of the middle of the panels 13 under the impact of falling rocks and prevent stress concentration. One or two pairs of vertical elastic shock absorbers 12 can be provided as needed.

[0041] The shock-absorbing roadbed structure comprises a roadbed base plate 7 and a shock-absorbing support 8, the transverse ends of the roadbed base plate 7 are supported on the top of the lower elastic shock-absorbing beam 4 through the shock-absorbing support 8, and the shock-absorbing support 8 plays a vertical shock-absorbing role.

[0042] In other embodiments, a transverse damper 9 is also provided between the roadbed base plate 7 and the front row of anti-slide piles 1, which absorbs and dissipates the transverse vibration energy under the action of earthquake and train load, effectively reducing the vibration response of the roadbed base plate 7. The near-bedrock side of the roadbed base plate 7 is also provided with a buckling-restrained brace 6, one end of which is connected to the roadbed base plate 7 and the other end is connected to the top of the lower elastic shock-absorbing beam 4. The buckling-restrained brace 6 cooperates with the transverse damper 9 to control the transverse vibration response of the roadbed base plate 7 and reduce the transverse vibration deformation.

[0043] As Figure 2 and Figure 3 The rear row of pile wall 2 comprises a rear row of piles and a shock-absorbing retaining plate 3, the rear row of piles is transversely opposite to the front row of anti-slide piles 1, the upper elastic shock-absorbing beam 10 and the lower elastic shock-absorbing beam 4 are arranged on the side of the rear row of piles, and the shock-absorbing retaining plate 3 is longitudinally connected between adjacent rear row of piles in the form of a post-hung plate.

[0044] In other embodiments, the shock-absorbing retaining plate 3 comprises a retaining plate body and a flexible buffer layer, the flexible buffer layer is attached to the near-bedrock side of the retaining plate body, and the flexible buffer layer is flush with the top of the rear row of piles.

[0045] In addition, the top of the bedrock is also structurally modified, and the top of the bedrock near the near-bedrock side of the rear row of pile wall 2 is provided with a sunken rockfall chute 14, which is lower than the top of the rear row of pile wall 2.

[0046] The front row of anti-slide piles 1 and the upper elastic shock-absorbing cross beams 10 and the lower elastic shock-absorbing cross beams 4 on the sides thereof are integrally poured structures by reserved steel reinforcement, and similarly, the rear row of piles and the upper elastic shock-absorbing cross beams 10 and the lower elastic shock-absorbing cross beams 4 on the sides thereof are integrally poured structures by reserved steel reinforcement.

[0047] It should be noted that in the structure of the utility model, the lateral elastic shock absorber 5, the buckling-restrained brace 6, the shock isolation support 8, the lateral damper 9, the elastic support 11 and the vertical elastic shock absorber 12 are all existing engineering finished products, and any commercially available equipment that can meet the functional requirements of the utility model can be used in the implementation of the utility model, and the utility model does not make internal modifications to these structures.

[0048] The utility model has the ability of lateral shock absorption and energy dissipation, the elastic shock-absorbing cross beams are arranged on the top of the front and rear rows of piles and the anchoring sections, the cantilever stress of the rear row of pile walls is improved to be the stress of a simply supported beam, and the bending moment of the rear row of piles and the displacement of the top are greatly reduced; meanwhile, under the action of an earthquake, the vibration of the structure along the sliding direction of the slope body is reduced through the shock-absorbing cross beams, and the stability of the rear row of anti-slide piles is ensured.

[0049] In addition, the utility model has the ability of preventing rockfall impact, the rockfall groove is arranged, the right side sliding soil and rockfall can be effectively blocked, the buffer shed surface is arranged on the upper shock-absorbing cross beam, the impact energy of high-position rockfall can be effectively eliminated, and the safety of the roadbed structure is ensured.

[0050] Under the premise of ensuring the bearing capacity of the pile body, the lateral shock-absorbing system absorbs and dissipates the seismic energy, thereby effectively reducing the internal force and deformation of the anti-slide pile under the action of an earthquake, the design pile diameter under the same seismic intensity can be reduced, the pile spacing is further enlarged, and the overall construction amount is small.

[0051] The above describes the utility model by using specific examples, which is only used to help understand the utility model and does not limit the utility model. According to the idea of the utility model, those skilled in the art of the technical field to which the utility model belongs can make some simple deductions, deformations or substitutions.

Claims

1. A rockfall-resistant anti-slide energy-dissipation pile combination structure, characterized in that: the structure comprises a front row of anti-slide piles (1), a rear row of pile-slab walls (2), a shock-absorbing roadbed structure, and a buffer canopy structure; the front row of anti-slide piles (1) is longitudinally arranged on the far-rock side, and the rear row of pile-slab walls (2) is longitudinally arranged close to the rock on the near-rock side; the front row of anti-slide piles (1) and the rear row of pile-slab walls (2) are each provided with an upper elastic shock-absorbing crossbeam (10) and a lower elastic shock-absorbing crossbeam (4); transverse elastic shock absorbers (5) are connected between the upper elastic shock-absorbing crossbeams (10) on both sides and between the lower elastic shock-absorbing crossbeams (4) on both sides; the shock-absorbing roadbed structure is located above the lower elastic shock-absorbing crossbeams (4), and the buffer canopy structure is located above the upper elastic shock-absorbing crossbeams (10).

2. The rockfall-resistant anti-slide energy-dissipation pile combination structure according to claim 1, characterized in that: the buffer canopy structure comprises canopy slabs (13) and elastic supports (11), and the transverse ends of the canopy slabs (13) are supported on the top of the front row of anti-slide piles (1) and the top of the rear row of pile-slab walls (2) through the elastic supports (11).

3. The rockfall-resistant anti-slide energy-dissipation pile combination structure according to claim 2, characterized in that: the top of the upper elastic shock-absorbing crossbeam (10) is provided with a vertical elastic shock absorber (12), and the vertical elastic shock absorber (12) is supported below the canopy slabs (13).

4. The rockfall-resistant anti-slide energy-dissipation pile combination structure according to claim 1, characterized in that: the shock-absorbing roadbed structure comprises a roadbed base plate (7) and shock-absorbing supports (8), and the transverse ends of the roadbed base plate (7) are supported on the top of the lower elastic shock-absorbing crossbeams (4) through the shock-absorbing supports (8).

5. The rockfall-resistant anti-slide energy-dissipation pile combination structure according to claim 4, characterized in that: a transverse damper (9) is arranged between the roadbed base plate (7) and the front row of anti-slide piles (1).

6. The rockfall-resistant anti-slide energy-dissipation pile combination structure according to claim 4, characterized in that: the near-rock side of the roadbed base plate (7) is provided with a buckling-restrained brace (6), one end of which is connected to the roadbed base plate (7) and the other end of which is connected to the top of the lower elastic shock-absorbing crossbeams (4).

7. The rockfall-resistant anti-slide energy-dissipation pile combination structure according to claim 1, characterized in that: the rear row of pile-slab walls (2) comprises a rear row of piles and shock-absorbing retaining slabs (3); the rear row of piles is transversely opposite to the front row of anti-slide piles (1), and the upper elastic shock-absorbing crossbeams (10) and the lower elastic shock-absorbing crossbeams (4) are arranged on the side faces of the rear row of piles; and the shock-absorbing retaining slabs (3) are longitudinally connected between adjacent rear row of piles.

8. The rockfall-resistant anti-slide energy-dissipation pile combination structure according to claim 7, characterized in that: the shock-absorbing retaining slabs (3) comprise retaining slab bodies and flexible buffer layers, and the flexible buffer layers are attached to the near-rock sides of the retaining slab bodies. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 9. The rockfall-resistant, slide-resistant, energy-dissipating combined structure of piles according to claim 1, characterized in that: the top of the rear row of pile walls (2) is higher than the top of the front row of anti-slide piles (1), and the buffer roof structure is inclined downward from the near-bedrock side to the far-bedrock side.

10. The rockfall-resistant, slide-resistant, energy-dissipating combined structure of piles according to claim 1, characterized in that: the bedrock top of the near-bedrock side of the rear row of pile walls (2) is provided with a sunken rockfall chute (14) that is lower than the top of the rear row of pile walls (2).

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