CN-117230816-B - Protection device for tunnel portal high steep side slope

CN117230816BCN 117230816 BCN117230816 BCN 117230816BCN-117230816-B

Abstract

The application provides a protection device for a high-steep side slope of a tunnel portal, which comprises a protection net, a plurality of groups of anchoring mechanisms for fixing the protection net to the side slope and reinforcing plates connected between every two adjacent anchoring mechanisms, wherein each group of anchoring mechanisms are respectively arranged at each corner position of the protection net, each anchoring mechanism comprises an embedded anchor seat and an anchor rod piece, the embedded anchor seats are buried in the soil of the side slope in advance, the anchor rod pieces and the embedded anchor seats are used for clamping and fixing the protection net together, the anchor rod pieces are arranged on the embedded anchor seats in a penetrating mode and are anchored in the soil of the side slope, the reinforcing plates are connected between the adjacent embedded anchor seats, positioning nails are arranged on the side faces of the reinforcing plates, and penetrate through the protection net and are anchored in the soil of the side slope. Based on the integral anchoring system, the reinforcing plate, the embedded anchor seat and the anchor rod piece jointly form the protective net, and when the local part is loosened, the integral anchoring system is less affected, so that the protective net can keep good protective capability.

Inventors

WANG YAO
GUO XIAO
TU MINJIE
WU LONGSHAN
CHENG SUJUAN
HUANG ZHAOHUA
GUO HUI

Assignees

中建海峡建设发展有限公司

Dates

Publication Date: 20260505
Application Date: 20231027

Claims (7)

1. The protection device for the high and steep side slope of the tunnel portal is characterized by comprising a protection net (1), a plurality of groups of anchoring mechanisms for fixing the protection net (1) on the side slope and reinforcing plate pieces (4) connected between every two adjacent anchoring mechanisms, wherein each group of anchoring mechanisms is respectively arranged at each corner position of the protection net (1); The anchoring mechanism comprises an embedded anchor seat (2) which is embedded in the side slope soil in advance and an anchor rod piece (3) which is fixed on the embedded anchor seat (2), the anchor rod piece (3) and the embedded anchor seat (2) jointly clamp and fix the protective net (1), and the anchor rod piece (3) is penetrated in the embedded anchor seat (2) and anchored in the side slope soil; the reinforcing plate (4) is connected between adjacent embedded anchor seats (2), positioning nails (43) are arranged on the side faces of the reinforcing plate (4), and the positioning nails (43) penetrate through the protective net (1) and are anchored in the soil of the side slope; The embedded anchor seat (2) is provided with an axially-through cavity (21), the peripheral surface of the embedded anchor seat (2) is provided with a plurality of mounting grooves (23) communicated with the cavity (21), and each mounting groove (23) is movably provided with a pushing piece (22); The end part of each pushing piece (22) is provided with an abutting part (221), in an initial state, each pushing piece (22) is retracted into the mounting groove (23), at the moment, each abutting part (221) is mutually abutted to form a penetration area for the tip of the anchor rod piece (3) to pass through, the anchor rod piece (3) is inserted into the cavity (21), when the anchor rod piece (3) enters the cavity (21), the anchor rod piece (3) enters the penetration area and forces each abutting part (221) to be mutually separated, and finally, each pushing piece (22) is inserted into the side slope soil; The outer peripheral surface of the anchor rod piece (3) is provided with a guide block (31), the inner wall of the cavity (21) is provided with a guide groove (24) which is matched with the guide block (31) in a sliding way, the guide groove (24) comprises a straight line section (241) and an arc line section (242) which are communicated with each other, the extension direction of the straight line section (241) is the same as the axis direction of the cavity (21), and the arc line section (242) spirally extends along the axis direction of the cavity (21); An elastic component (32) is arranged at the top of the guide block (31), when the guide block (31) is positioned in a straight line section (241), the elastic component (32) is opposite to a gap between two abutting parts (221), and when the guide block (31) is positioned in an arc section (242), the elastic component (32) abuts against the lower end face of the abutting parts (221), and a reinforcing component (6) for reinforcing anchoring stress is further arranged between the anchor rod piece (3) and the embedded anchor seat (2); The reinforcing components (6) are provided with a plurality of groups, all the reinforcing components (6) are uniformly distributed along the peripheral surface of the anchor rod piece (3), wherein the reinforcing components (6) comprise rotating rod pieces (61) which are rotatably connected with the anchor rod piece (3) and telescopic arm groups (63) which are arranged at the end parts of the embedded anchor seats (2), and torsion springs (62) are arranged at the rotating connection parts of the rotating rod pieces (61) and the anchor rod piece (3) and are used for forcing the rotating rod pieces (61) to be arranged at an angle with the anchor rod piece (3) in a normal state; when the anchor rod piece (3) is inserted into the cavity (21) and the guide block (31) is positioned at the arc section (242), the rotary rod piece (61) is positioned at one side of the embedded anchor seat (2) far away from the protective net (1), and when the anchor rod piece (3) is forced to move outwards, the rotary rod piece (61) can prop against the embedded anchor seat (2) to deflect outwards and force the telescopic arm group (63) to extend outwards.
2. The tunnel portal high and steep slope protection device according to claim 1, wherein the telescopic arm group (63) comprises a fixed arm plate (64) fixed on the outer peripheral surface of the embedded anchor seat (2) and a movable arm plate (65) movably connected with the fixed arm plate (64), an extension spring (66) is arranged between the movable arm plate (65) and the fixed arm plate (64) and used for forcing the movable arm plate (65) to move towards the direction approaching the fixed arm plate (64), a movable area is formed between the movable arm plate (65) and the fixed arm plate (64) in the initial state, and when the rotary rod (61) abuts against the embedded anchor seat (2), the rotary rod (61) enters the movable area and forces the movable arm plate (65) to move towards the direction far away from the fixed arm plate (64).
3. The tunnel portal high and steep side slope protection device according to claim 1, wherein the telescopic arm group (63) is arranged in a downward inclined manner along a direction away from the central axis of the embedded anchor seat (2).
4. The device for protecting a high and steep side slope of a tunnel portal according to claim 1, wherein the pushing member (22) is disposed obliquely upward in a direction away from the central axis of the cavity (21).
5. The protection device for the high and steep side slope of the tunnel portal according to claim 1, wherein the outer peripheral surface of the embedded anchor seat (2) is provided with a connecting section (25), and when the embedded anchor seat (2) is embedded in the side slope soil, the connecting section (25) is abutted against the side slope surface; the reinforcing plate (4) is provided with a kidney-shaped hole (41), the connecting section (25) is rotationally connected with a locking piece (26), the end part of the locking piece (26) is provided with a locking plate (261), and the locking plate (261) and the connecting section (25) are arranged at intervals to form a positioning area for positioning the reinforcing plate (4).
6. The protection device for the high and steep side slope of the tunnel portal according to claim 5, wherein an elastic cushion is arranged on the back surface of the reinforcement plate (4), a first tooth-shaped portion (42) is arranged on the surface of the reinforcement plate (4), the first tooth-shaped portion (42) is located on the outer side of the kidney-shaped hole (41), a second tooth-shaped portion (262) is arranged on the side surface, close to the connecting section (25), of the lock plate (261), and when the length direction of the lock plate (261) is perpendicular to the length direction of the kidney-shaped hole (41), the first tooth-shaped portion (42) is engaged with the second tooth-shaped portion (262) in a matching mode.
7. The protection device for the high and steep side slope of the tunnel portal according to claim 1, further comprising a pre-buried water guide plate (5) which is buried in the side slope soil in advance, wherein the pre-buried water guide plate (5) is provided with perforations (58), and the positioning nails (43) sequentially penetrate through the protection net (1) and the perforations (58) and then are anchored in the side slope soil; The embedded water guide plate (5) is provided with a water permeable structure, the water permeable structure comprises a water permeable groove (521) formed in the top of the embedded water guide plate (5) and geotechnical cloth (522) covering the water permeable groove (521), a green cultivation block (57) is arranged inside the embedded water guide plate (5), and a preformed hole for the root system of the green cultivation block (57) to pass through is formed in the side face of the embedded water guide plate (5).

Description

Protection device for tunnel portal high steep side slope Technical Field The application relates to the technical field of side slope protection, in particular to a protection device for a high and steep side slope of a tunnel portal. Background The tunnel is a building which is built in mountain bodies, paved with railways or built on roads for motor vehicles to pass, and for some mountain bodies with steep topography, the slope at the position of the tunnel portal after the tunnel is built is relatively high and steep, the risk of potential safety hazard caused by falling rocks and falling exists, and mine slope protection measures need to be adopted. The tunnel portal slope protection device is arranged on the slope for ensuring the safety of the slope and the surrounding environment. The existing reinforcing and protecting device generally adopts a protecting net, the protecting net is covered on the surface of a side slope, and then the protecting net is installed and fixed through an anchor rod to play a protecting effect, however, for a side slope with high and steep topography, the anchor rod is easy to loosen or even separate from the soil of the side slope after the rain wash and soil erosion on the surface of the side slope, so that the protecting effect of the protecting net is weakened or even lost, and potential safety hazards still exist. Disclosure of Invention In order to enable the protection net to keep good protection capability, the application provides a protection device for a high and steep side slope of a tunnel portal. The application provides a protection device for a high steep side slope at a tunnel portal, which adopts the following technical scheme: The utility model provides a protection device of high steep side slope of tunnel portal, includes protection network, is used for fixing the protection network in the multiunit anchor mechanism of side slope and connects the reinforcement plate between every two adjacent anchor mechanisms, and each anchor mechanism of group sets up in each corner position of protection network respectively; The anchoring mechanism comprises an embedded anchor seat and an anchor rod piece, wherein the embedded anchor seat is embedded in the slope soil in advance, the anchor rod piece is fixed to the embedded anchor seat, the anchor rod piece and the embedded anchor seat jointly clamp and fix the protective net, and the anchor rod piece penetrates through the embedded anchor seat and is anchored in the slope soil; the reinforcement plate is connected between the adjacent embedded anchor seats, positioning nails are arranged on the side faces of the reinforcement plate, penetrate through the protective net and are anchored in the soil of the side slope. By adopting the technical scheme, the high-steep side slope outside the tunnel portal is provided with the embedded anchor seats in an embedded manner, the embedded anchor seats are positioned at the corner positions of the protection net after the protection net is paved on the surface of the side slope, and the positioning nails of the reinforcing plate penetrate through the grid gaps of the protection net and are respectively connected with the adjacent embedded anchor seats at the two side ends of the reinforcing plate, so that the reinforcing plate can anchor the corner positions of the protection net on the side slope. Finally, the anchor rod piece is inserted into the embedded anchor seat, the anchor rod piece can play an anchoring and reinforcing role on the corner position of the protective net, and then the integral anchoring system of the protective net is formed, when water and soil flow occurs to the local side slope soil, the anchoring mechanism at the local position or the positioning nail at the local position is loosened, the influence on the integral anchoring system is small, and the protective net can still maintain good protective capability. Optionally, the embedded anchor seat is provided with an axially through cavity, the peripheral surface of the embedded anchor seat is provided with a plurality of mounting grooves communicated with the cavity, and each mounting groove is movably provided with a pushing piece; The end part of the pushing piece is provided with an abutting part, in an initial state, each pushing piece is retracted into the mounting groove, at the moment, each abutting part abuts against each other to jointly form a penetration area for the tip of the anchor rod piece to pass through, the anchor rod piece is inserted into the cavity, when the anchor rod piece enters the cavity, the anchor rod piece enters the penetration area and forces each abutting part to be mutually far away, and finally each pushing piece is inserted into the side slope soil. Through adopting foretell technical scheme, through inserting the stock spare in the cavity of pre-buried anchor seat, the tip of stock spare gets into the cross-under area, supports after each butt portion, continue