CN115012433B - Supporting frame for preventing tunnel landslide caused tunnel collapse due to excavation of tunnel in side slope - Google Patents

Abstract

The invention discloses a support frame for preventing tunnel collapse caused by landslide during excavation of a tunnel in a side slope, which comprises a wire mesh slurry layer and a support frame body, wherein the wire mesh slurry layer is laid on the surface layer of the slope, a plurality of groups of first drill holes and second drill holes are drilled into the slope, a first fixed seat installed at an orifice of a first drill hole and a second fixed seat installed at an orifice of a second drill hole are respectively embedded into the wire mesh slurry layer, a detachable energy release rod piece is embedded into the second drill hole, an anchor rod is embedded into the first drill hole and the second drill hole which does not contain the energy release rod piece, the support frame body is laid outside the wire mesh slurry layer and is connected with the first fixed seat positioned on the outermost layer through an anchor rope, and the outer end part of the anchor rod is connected with the support frame body.

Description

Supporting frame for preventing tunnel landslide caused tunnel collapse due to excavation of tunnel in side slope

Technical Field

The invention relates to the technical field of tunnel construction, in particular to a support frame for preventing tunnel collapse caused by landslide by digging a tunnel in a side slope.

Background

At present, excavate the in-process in tunnel on the side slope, the outside side slope ground layer of its tunnel portal, it is firm to generally need to maintain, prevent the tunnel excavation in-process, carry out deformation extrusion inflation trend by tunnel portal one side ground layer to the ground layer in its outside, and side slope ground layer frequently receives the transmission of vibration wave and vibration internal energy, thereby cause the not hard up landing situation to appear in the rock stratum in side slope ground layer area, and the rock piece of landing on the side slope ground layer, not only make the construction operation be under the hazardous environment state, and lead to ground layer structure to suffer destruction, and then arouse the tunnel to collapse.

Accordingly, those skilled in the art have provided a supporting frame for excavating a tunnel in a slope to prevent landslide and to induce tunnel collapse, so as to solve the problems of the related art as described above.

Disclosure of Invention

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a dig support frame that tunnel landslide initiation tunnel collapses in side slope, its includes the silk screen thick liquid layer and struts the support body, the silk screen thick liquid layer is laid in domatic top layer to first drilling and the second drilling of getting the multiunit to domatic inside, just still imbed respectively in the silk screen thick liquid layer and install in the first solid seat in first drilling drill way and install in the solid seat of second drilling drill way, the embedding has the detachable to release the energy member in the second drilling, just first drilling with do not contain it has the stock to embed in the second drilling of releasing the energy member, strut the support body lay in silk screen thick liquid layer outside, and be located outmost through the anchor rope first solid seat links up mutually, just the outer tip of stock is connected with the support body.

Preferably, the first drill holes and the second drill holes are arranged on the surface layer of the slope in a square distribution manner, and four groups of first drill holes which are distributed in a cross manner are arranged outside each group of the second drill holes.

Preferably, the energy release rod piece comprises a load pipe column, a load rod, a sealing barrel bag and a spiral flow guide vane, an energy release hole is formed in the wall of the load pipe column, a radial energy absorption rod piece and a flow guide assembly are installed in the energy release hole, the energy absorption rod piece and the flow guide assembly are alternately arranged, the outer end portions of the adjacent energy absorption rod piece and the adjacent flow guide assembly are hinged and connected through the load rod, the sealing barrel bag is further sleeved at the outer end portions of the energy absorption rod piece and the flow guide assembly, the load rod is embedded in the sealing barrel bag, the spiral flow guide vane is arranged inside the load pipe column, and the spiral flow guide vane is used for guiding sand into the load pipe column and guiding the sand out of the load pipe column.

Preferably, the energy-absorbing member includes a load section of thick bamboo, presss from both sides and holds in the palm slide bar and spring buffer, a load section of thick bamboo set up in the energy release hole, press from both sides the embedding of holding in the palm slide bar portion slidable inside a load section of thick bamboo, press from both sides the outer end of holding in the palm and press from both sides the portion of pressing from both sides and install the guide wheel, just press from both sides and hold in the palm and be connected through spring buffer between slide bar and the load section of thick bamboo.

Preferably, the spring buffer part comprises a supporting spring and an oval ball plate, the supporting spring and the oval ball plate are sleeved on the outer side of the sliding rod part of the clamping support sliding rod and are alternately arranged, and the supporting spring and the oval ball plate are adjacent to each other and are mutually connected.

Preferably, the radius of the oval plate along the direction of the clamping and supporting slide rod part is smaller than the radius perpendicular to the direction of the clamping and supporting slide rod part, and the cross section of the oval plate is oval.

Preferably, the water conservancy diversion subassembly includes sealed shell seat, expansion pipe barrel and jet-propelled pipe, sealed shell seat set up in releasing the energy hole, the jet-propelled pipe set up in the load tube column wall, and be located in the sealed shell seat jet-propelled pipe has seted up the orifice on the pipe wall, the expansion pipe barrel box in the jet-propelled mouth and the sealing connection of sealed shell seat, the expansion pipe barrel is kept away from one of sealed shell seat and is served and install the jet-propelled head.

Preferably, the jet flow head is further provided with a ball.

Preferably, the support body includes linking seat one, linking seat two and cantilever plate, link up seat one with be located anchor rod cover in the first drilling is inlayed and is connected, link up seat one and be connected through spring and first solid seat, follows the drill way outside of second drilling is equipped with two sets of axiallys link up seat two, be close to domatic top layer link up seat two install in on the solid seat of second, keep away from domatic top layer link up seat two with be close to domatic top layer link up seat two and be connected through elastic telescopic rod, and every group link up seat one and adjacent link up seat two respectively through independent cantilever plate articulated linking, and lie in still to install the external silk screen that attaches on the cantilever plate of the same horizontal plane.

A supporting method of a supporting frame for preventing tunnel collapse caused by tunnel landslide excavation in a side slope comprises the following steps:

s1: leveling the side slope, alternately positioning and marking a first drill hole and a second drill hole to be drilled in a square distribution manner, drilling, and paving to prepare a silk screen slurry layer;

s2: installing an anchor rod in the first drilling hole, installing an energy release rod in the second drilling hole, and installing a partial support frame body;

s3: the sand body is gradually led into the filling energy release rod piece through the spiral guide vane;

s4: sequentially filling high-pressure gas in a time period of T into the second drill hole, monitoring whether a local rock-soil layer where the second drill hole is located has cracks or not, wherein an air pressure monitor for monitoring air pressure is arranged, and if the air pressure in the second drill hole is gradually reduced, the cracks or the seams are formed in the second drill hole;

s5: selecting a second drill hole with reduced air pressure, respectively filling dusty slurry powder and atomized water vapor through a high-pressure high-speed gas fluid device I and a high-pressure high-speed gas fluid device II in sequence, and performing repeated circulating operation until the air pressure value in the second drill hole is increased, so that the filling and repairing of cracks and apertures are completed, and the slurry powder and the water vapor are jet pipes which are independently used;

s6: after repairing is completed, plugging the second drilled hole, filling high-pressure gas in the T time period again, monitoring the change amplitude of the air pressure value in real time, and if the air pressure value is lowered, performing the step S5 again;

s7: after the tunnel excavation is finished, the sand bodies in the energy release rod pieces are led out, the energy release rod pieces are disassembled, a certain amount of energy release rod pieces can be reserved to be used for monitoring the internal structure condition of the slope rock-soil layer, and the anchor rods are installed again after the second drilled holes are disassembled.

Compared with the prior art, the invention provides a support frame for preventing tunnel collapse caused by landslide due to excavation of a tunnel in a side slope, which has the following beneficial effects:

according to the invention, the hole seams and cracks existing in the rock-soil layer are monitored in advance, the hole seams and cracks are filled through the cyclic filling of the slurry powder and water vapor, the conditions of vibration caused by the internal structure of the rock-soil layer and internal energy generated by extrusion are processed in the tunnel excavation process, the filling medium and the energy-absorbing medium serving as energy-releasing rod pieces are provided through the flexible sand body, so that the vibration caused by the internal structure of the rock-soil layer and the internal energy generated by extrusion are better buffered and absorbed, after the tunnel excavation is finished, the rock-soil layer is reinforced through the complete support frame body and the anchor rod, and the energy-releasing rod pieces are detachably guided into the second drilling hole, the reuse rate of the energy-releasing rod pieces is improved, and some energy-releasing rod pieces are reserved after the tunnel excavation is finished, so that the internal conditions of the slope layer can be monitored in real time, and early warning and reinforcement can be realized in time.

Drawings

Figure 1 is a schematic view of the construction of the retaining frame of the present invention;

FIG. 2 is an enlarged view of a cross-sectional portion of the energy releasing rod of the present invention;

FIG. 3 is a schematic view of a drill hole implementation of the present invention;

in the figure: 1. a wire mesh slurry layer; 2. a first bore hole; 3. a second bore hole; 4. a first fixing seat; 5. a second fixed seat; 6. an anchor rod; 7. an energy releasing rod; 8. a support frame body; 9. an anchor cable; 81. a first connecting seat; 82. a spring; 83. a second connecting seat; 84. an elastic telescopic rod; 85. a support arm plate; 86. externally attaching a silk screen; 71. loading the pipe string; 72. an energy release hole; 73. an energy absorbing rod; 74. a flow guide assembly; 75. a load bar; 76. sealing the barrel bag; 77. a spiral guide vane; 741. a sealed housing seat; 742. a telescopic tube barrel; 743. a jet head; 744. a jet pipe; 745. a ball bearing; 731. a load drum; 732. clamping and supporting the sliding rod; 733. a guide wheel; 734. a support spring; 735. an oval plate.

Detailed Description

Referring to fig. 1-3, the present invention provides a technical solution: a supporting frame for preventing tunnel collapse caused by tunnel landslide excavation in a side slope comprises a wire mesh slurry layer 1 and a supporting frame body 8, wherein the wire mesh slurry layer 1 is laid on the surface layer of the slope surface and a plurality of groups of first drill holes 2 and second drill holes 3 are drilled into the slope surface, a first fixed seat 4 installed at the hole opening of a first drill hole 2 and a second fixed seat 5 installed at the hole opening of a second drill hole 3 are respectively embedded into the wire mesh slurry layer 1, a detachable energy release rod piece 7 is embedded into the second drill hole 3, an anchor rod 6 is embedded into the first drill hole 2 and the second drill hole 3 which does not contain the energy release rod piece 7, the supporting frame body 8 is laid outside the wire mesh slurry layer 1 and is connected with the outer end part of the first fixed seat 4 located on the outermost layer through an anchor rope 9, and the anchor rod 6 is connected with the supporting frame body 8;

in the above scheme, to the tunnel excavation in-process, the vibration that causes ground bed inner structure, the situation of the internal energy that the extrusion produced is handled, and the hole seam that ground bed inside self exists, the crack problem is handled, cushion and absorb through releasing the ability member, and to the hole seam, the crack is mended and is filled, accomplish the back to the tunnel excavation, support body and stock through the complete and consolidate the ground bed, in this, release the ability member for in the leading-in second drilling of detachable, make it possess used repeatedly's function, and after the tunnel excavation is accomplished, reserve some release the ability member, thereby the inside situation on monitoring side slope ground layer that can be better, so that in time early warning and reinforcement, the masterability degree to side slope ground bed inner structure has been improved.

In a preferable scheme, the first drill holes 2 and the second drill holes 3 are arranged on the surface layer of the slope in a square distribution manner, and four groups of first drill holes 2 distributed in a cross manner are arranged outside each group of second drill holes 3;

in the scheme, the distribution mode of the first drilling holes and the second drilling holes is set so that the support body can be laid and installed conveniently, a traction structure body laid on the surface of the side slope rock-soil layer is formed, and the stress uniformity of the surface and the inner structure of the side slope rock-soil layer is facilitated.

In a preferable scheme, the energy release rod 7 comprises a load string 71, a load rod 75, a sealing cylinder bag 76 and a spiral flow guide vane 77, an energy release hole 72 is formed in the wall of the load string 71, a radial energy absorption rod 73 and a flow guide assembly 74 are installed in the energy release hole 72, the energy absorption rod 73 and the flow guide assembly 74 are alternately arranged, the outer ends of the adjacent energy absorption rod 73 and the flow guide assembly 74 are connected through the load rod 75, the sealing cylinder bag 76 is further sleeved at the outer ends of the energy absorption rod 73 and the flow guide assembly 74, the load rod 75 is embedded in the sealing cylinder bag 76, the spiral flow guide vane 77 is arranged inside the load string 71, and the spiral flow guide vane 77 is used for guiding sand into the load string 71 and guiding the sand out of the load string 71;

in the scheme, the spiral guide vanes are used for filling sand bodies into the energy release rod pieces, so that the energy release rod pieces are in a solid structure, the wall of the second drilling hole is supported and vibration-buffered through the sand bodies positioned outside the load pipe column, and internal energy generated by the wall of the rock-soil layer is absorbed through the flowability of the sand bodies, so that the probability of cracks in the rock-soil layer caused by internal energy increase is reduced, and the sand bodies can be led out through the spiral guide vanes;

it should be noted that, the outside still is equipped with the high-pressure high-velocity gas fluidic device one that is used for dusting thick liquid to and with the high-pressure high-velocity gas fluidic device two of moisture atomizing, be linked together with independent water conservancy diversion subassembly respectively, through filling in the second drilling pore wall that has crack, aperture with the thick liquid powder of dusting and atomizing steam circulation in proper order, fills crack, aperture, avoids the crack opening to last the increase, improves the inside physical strength of ground layer.

In a preferable scheme, the energy absorbing rod 73 comprises a load cylinder 731, a clamping and supporting sliding rod 732 and a spring buffer, the load cylinder 731 is arranged in the energy releasing hole 72, a sliding rod part of the clamping and supporting sliding rod 732 is slidably embedded into the load cylinder 731, a guide wheel 733 is mounted at a clamping part of the outer end of the clamping and supporting sliding rod 732, and the clamping and supporting sliding rod 732 is connected with the load cylinder 731 through the spring buffer;

in the above scheme, through the setting of guide wheel for the installation and the dismantlement of energy release member are comparatively convenient, through the cooperation contact of spring buffer spare and husky body, and regard as spring buffer spare's damping medium by husky body, make spring buffer spare's supporting and buffer strength improve by a wide margin, have played fine guard action to spring buffer spare self structure.

Further, the spring buffer comprises a supporting spring 734 and an oval ball plate 735, the supporting spring 734 and the oval ball plate 735 are sleeved outside the sliding rod part of the clamp-supporting sliding rod 732 and are alternately arranged, and the adjacent supporting springs 734 and the oval ball plates 735 are connected with each other;

through the shape of the curved surface profile of the oval plate, when the oval plate moves and displaces in the sand body, the oval plate can better push away the sand body when the sand body provides certain resistance to the oval plate.

Further, the radius of the elliptical ball plate 735 in the direction of the sliding portion of the clip holding sliding bar 732 is smaller than the radius of the elliptical ball plate 735 in the direction perpendicular to the sliding portion of the clip holding sliding bar 732, and the cross section of the elliptical ball plate 735 is elliptical.

In a preferred embodiment, the diversion assembly 74 includes a sealing housing seat 741, a telescopic tube 742 and an injection tube 744, the sealing housing seat 741 is disposed in the energy releasing hole 72, the injection tube 744 is disposed in the wall of the load string 71, and an injection hole is disposed on the wall of the injection tube 744 in the sealing housing seat 741, the telescopic tube 742 is sleeved on the injection hole of the sealing housing seat 741 and is connected to the injection hole in a sealing manner, and an injection head 743 is mounted on one end of the telescopic tube 742, which is far away from the sealing housing seat 741.

In a preferred embodiment, the jet head 743 is further provided with a ball 745, so as to reduce friction between the end of the jet head and the wall of the second bore hole 3.

In a preferred scheme, support body 8 includes linking seat one 81, linking seat two 83 and support arm plate 85, linking seat one 81 with be located 6 cover inlays of stock in the first drilling 2 are connected, linking seat one 81 is connected with first solid seat 4 through spring 82, follows the drill way outside of second drilling 3 is equipped with two sets of coaxial linking seat two 83, be close to domatic top layer linking seat two 83 install in on the solid seat 5 of second, keep away from domatic top layer linking seat two 83 with be close to domatic top layer linking seat two 83 are connected through elastic telescopic rod 84, and every group linking seat one 81 with adjacent linking seat two 83 articulate the link through independent support arm plate 85 respectively, and still install outer attachedly silk screen 86 on the support arm plate 85 that is located the same horizontal level.

In specific implementation, the method comprises the following steps:

s1: leveling the side slope, alternately positioning and marking a first drill hole and a second drill hole to be drilled in a square distribution manner, drilling holes, and paving and preparing a silk screen slurry layer;

s2: installing an anchor rod in the first borehole, installing an energy releasing rod piece in the second borehole, and installing a partial support frame body;

s3: the sand body is gradually led into the filling energy release rod piece through the spiral guide vane;

s4: sequentially filling high-pressure gas in a time period of T into the second drill hole, monitoring whether a local rock-soil layer where the second drill hole is located has cracks or not, wherein an air pressure monitor for monitoring air pressure is arranged, and if the air pressure in the second drill hole is gradually reduced, the cracks or the seams are formed in the second drill hole;

s5: selecting a second drill hole with reduced air pressure, respectively filling dusted slurry powder and atomized water vapor through a high-pressure high-speed gas fluid device I and a high-pressure high-speed gas fluid device II in sequence, and performing repeated circulating operation until the air pressure value in the second drill hole is increased, so that filling and repairing of cracks and apertures are completed, and the slurry powder and the water vapor are independently used jet pipes;

s6: after repairing is completed, plugging the second drilled hole, filling high-pressure gas in the T time period again, monitoring the change amplitude of the air pressure value in real time, and if the air pressure value is lowered, performing the step S5 again;

s7: after the tunnel excavation is finished, the sand bodies in the energy release rod pieces are led out, the energy release rod pieces are disassembled, a certain amount of energy release rod pieces can be reserved to be used for monitoring the internal structure condition of the slope rock-soil layer, and the anchor rods are installed again after the second drilled holes are disassembled.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the inventive concept within the technical scope of the present invention, and the technical solution and the inventive concept thereof should be covered by the scope of the present invention.

Claims (9)

1. The utility model provides a dig in support frame that tunnel landslide prevention causes tunnel to collapse in side slope which characterized in that: the energy-releasing rod type anchor rod device comprises a wire mesh slurry layer (1) and a support frame body (8), wherein the wire mesh slurry layer (1) is laid on the surface layer of the slope surface, a plurality of groups of first drill holes (2) and second drill holes (3) are drilled into the slope surface, a first fixed seat (4) installed at the hole opening of the first drill hole (2) and a second fixed seat (5) installed at the hole opening of the second drill hole (3) are respectively embedded into the wire mesh slurry layer (1), a detachable energy-releasing rod piece (7) is embedded into the second drill hole (3), an anchor rod (6) is embedded into the first drill hole (2) and the second drill hole (3) which does not contain the energy-releasing rod piece (7), the support frame body (8) is laid outside the wire mesh slurry layer (1) and is connected with the first fixed seat (4) located on the outermost layer through an anchor cable (9), and the anchor rod (6) is connected with the support frame body (8);

the energy release rod piece (7) comprises a load pipe column (71), a load rod (75), a sealing barrel bag (76) and a spiral flow guide vane (77), an energy release hole (72) is formed in the wall of the load pipe column (71), a radial energy absorption rod piece (73) and a flow guide assembly (74) are installed in the energy release hole (72), the energy absorption rod piece (73) and the flow guide assembly (74) are alternately arranged, the outer end portions of the adjacent energy absorption rod piece (73) and the flow guide assembly (74) are hinged and connected through the load rod (75), the sealing barrel bag (76) is further sleeved and embedded at the outer end portions of the energy absorption rod piece (73) and the flow guide assembly (74), the load rod (75) is embedded in the sealing barrel bag (76), the spiral flow guide vane (77) is arranged inside the load pipe column (71), and the spiral flow guide vane (77) is used for guiding sand into the load pipe column (71) and guiding the sand out of the load pipe column (71).

2. The support frame for preventing landslide-induced tunnel collapse during excavation of a tunnel in a side slope according to claim 1, wherein: the first drill holes (2) and the second drill holes (3) are arranged on the surface layer of the slope surface in a square distribution mode, and each group of the first drill holes (2) are formed in the outer portion of each second drill hole (3) in a four-group cross distribution mode.

3. The support frame for preventing landslide-induced tunnel collapse during excavation of a tunnel in a side slope according to claim 1, wherein: energy-absorbing member (73) including a load section of thick bamboo (731), press from both sides and hold in the palm slide bar (732) and spring buffer, a load section of thick bamboo (731) set up in energy release hole (72), press from both sides and hold in the palm slide bar (732) slide bar portion slidable embedding inside a load section of thick bamboo (731), press from both sides the outer end clamp portion of holding in the palm slide bar (732) and install guide wheel (733), just press from both sides and hold in the palm and be connected through spring buffer between slide bar (732) and the load section of thick bamboo (731).

4. The support frame for preventing landslide-induced tunnel collapse during excavation of a tunnel in a side slope according to claim 3, wherein: the spring buffer comprises supporting springs (734) and oval ball plates (735), the supporting springs (734) and the oval ball plates (735) are sleeved on the outer side of the sliding rod part of the clamping support sliding rod (732) and are arranged alternately, and the adjacent supporting springs (734) are connected with the oval ball plates (735).

5. The support frame for preventing landslide-induced tunnel collapse during excavation of a tunnel in a side slope according to claim 4, wherein: the radius of the oval ball plate (735) along the direction of the sliding rod part of the clamping and supporting sliding rod (732) is smaller than the radius perpendicular to the direction of the sliding rod part of the clamping and supporting sliding rod (732), and the cross section of the oval ball plate (735) is oval.

6. The support frame for preventing landslide-induced tunnel collapse during excavation of a tunnel in a side slope according to claim 1, wherein: the flow guide assembly (74) comprises a sealing shell seat (741), a telescopic tube barrel (742) and a jet pipe (744), the sealing shell seat (741) is arranged in the energy release hole (72), the jet pipe (744) is arranged in the wall of the load tube column (71), the wall of the jet pipe (744) in the sealing shell seat (741) is provided with a jet hole, the telescopic tube barrel (742) is sleeved on a jet port of the sealing shell seat (741) and is in sealing connection, and one end, far away from the sealing shell seat (741), of the telescopic tube barrel (742) is provided with a jet head (743).

7. The support frame for preventing landslide-induced tunnel collapse during excavation of a tunnel in a side slope according to claim 6, wherein: the jet head (743) is also provided with a ball (745).

8. The support frame for preventing landslide-induced tunnel collapse during excavation of a tunnel in a side slope according to claim 1, wherein: support body (8) including linking up seat one (81), linking up seat two (83) and cantilever plate (85), link up seat one (81) with be located stock (6) cover in first drilling (2) are inlayed and are connected, link up seat one (81) through spring (82) and first solid seat (4) be connected, follow the drill way outside of second drilling (3) is equipped with two sets of axiallys link up seat two (83), be close to domatic surface layer link up seat two (83) install in on the second solid seat (5), keep away from domatic surface layer link up seat two (83) and be close to domatic surface layer link up seat two (83) are connected through elastic telescopic rod (84), and every group link up seat one (81) and adjacent link up seat two (83) and articulate through independent cantilever plate (85) respectively and link up, and lie in still install external attachment silk screen (86) on cantilever plate (85) on the same horizontal aspect.

9. The method for supporting the supporting frame for preventing the tunnel from collapsing caused by the landslide by excavating the tunnel in the side slope according to claim 6, which comprises the following steps:

s1: leveling the side slope, alternately positioning and marking a first drill hole and a second drill hole to be drilled in a square distribution manner, drilling, and paving to prepare a silk screen slurry layer;

s2: installing an anchor rod in the first drilling hole, installing an energy release rod in the second drilling hole, and installing a partial support frame body;

s3: the sand body is gradually led into the filling energy release rod piece through the spiral guide vane;

s4: sequentially filling high-pressure gas in a time period of T into the second drill hole, monitoring whether the local rock-soil layer where the second drill hole is located has cracks or fissures, wherein an air pressure monitor for monitoring air pressure is arranged in the second drill hole, and if the air pressure in the second drill hole is gradually reduced, the cracks or fissures are located in the second drill hole;

s5: selecting a second drilling hole with reduced air pressure, sequentially and respectively filling dusted slurry powder and atomized water vapor, and performing repeated circulating operation until the air pressure value in the second drilling hole is increased to finish filling and repairing of cracks and pore gaps, wherein the slurry powder and the water vapor are independently used jet pipes;

s6: after repairing is completed, plugging the second drilled hole, filling high-pressure gas in the T time period again, monitoring the change amplitude of the air pressure value in real time, and if the air pressure value is lowered, performing the step S5 again;

s7: after the tunnel excavation is finished, the sand bodies in the energy release rod pieces are led out, the energy release rod pieces are disassembled, a certain amount of energy release rod pieces can be reserved to be used for monitoring the internal structure condition of the slope rock-soil layer, and the anchor rods are installed again after the second drilled holes are disassembled.

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