Bidirectional anti-seismic high energy dissipation anti-shear corrosion self-healing anchoring system and construction method thereof

Abstract

The application discloses a bidirectional anti-seismic high-energy-consumption anti-shear corrosion self-repairing anchoring system and a construction method thereof. The system is composed of a tensioning corrosion-proof anchoring end, a bidirectional anti-seismic high-strength dead load anti-shear device, an embedded corrosion-proof anchoring end head and two perforated anchor rods. The system utilizes the bidirectional anti-seismic protrusions to reduce the prestress loss of the anchor rods, improves the ductility and energy consumption capacity of the anchor rods through the deformation energy consumption blocks, greatly enhances the shear capacity of the anchor rods by splitting the anchor rods into two parts and multi-layer reinforcement, and still can work normally in the case of shear failure of the anchor rods. The durability of the anchoring system is improved through various corrosion protection measures such as corrosion-proof oil, sacrificial anode protection and self-repairing microbial grouting. A comprehensive intelligent monitoring system is equipped with water pressure, vibration and stress sensors to realize real-time monitoring of the anchoring state. The anchoring system realizes the functions of long-term corrosion prevention, dead load high-energy-consumption large deformation, high-strength high-toughness shear resistance, shear failure without failure and bidirectional anti-seismic in the complex geological and occurrence environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of geotechnical engineering anchoring technology, and particularly relates to a bidirectional anti-seismic high-energy-consumption anti-shear corrosion-proof self-healing anchoring system and a construction method thereof. BACKGROUND

[0002] In recent years, with the expansion of the demand for production activities, complex underground engineering, excavation engineering are becoming more and more common, such as underground excavation engineering, tunnel engineering, underground passage engineering, underground mining engineering, underground storage engineering, large foundation pit engineering and the like, which put forward higher technical requirements for surrounding rock reinforcement. At present, as a kind of efficient reinforcement scheme for surrounding rock reinforcement, anchoring technology is more and more widely used in engineering. However, through the analysis of many engineering cases in recent years, there are still many problems in the existing surrounding rock anchoring scheme which are difficult to overcome, mainly as follows:

[0003] 1. Most of the existing anchoring devices have low deformation capacity and small ductility, while the existing engineering is prone to large deformation under extreme conditions such as earthquakes, and the anchoring device cannot adapt to the large deformation of surrounding rock, and brittle failure is easy to occur, so the safety of the engineering cannot be guaranteed;

[0004] 2. The existing anchoring device cannot cope with the long-term corrosion effect of the complex underground environment on the anchoring device, and the service life is mostly short, which cannot meet the requirements of the whole life cycle of modern engineering;

[0005] 3. There are large fissures or structural planes in the surrounding rock mass, and the rock mass may be dislocated, and the existing anchoring device generally cannot bear the shear stress generated by the dislocation of surrounding rock, and is prone to shear failure, which has a great safety hazard;

[0006] 4. The existing prestressed anchoring device may lose prestress due to vibration load caused by engineering excavation, earthquake and the like, so a kind of anchoring system which can overcome the transverse vibration load is needed.

[0007] In view of the above problems, a bidirectional anti-seismic high-energy-consumption high-ductility anti-shear corrosion-proof self-healing anchoring system and a construction method thereof are needed. SUMMARY

[0008] To solve the technical problems in the background art, the present application provides a bidirectional anti-seismic high-energy-consumption anti-shear corrosion-proof self-healing anchoring system and a construction method thereof.

[0009] The bidirectional anti-seismic high-energy-consumption anti-shear corrosion-proof self-healing anchoring system provided by the present application comprises:

[0010] The split type perforated anchor rod comprises an inner anchor rod and an outer anchor rod, and the two are mechanically coupled through a bidirectional anti-seismic high-strength constant load shear device;

[0011] The bidirectional anti-seismic high-strength dead load shear device comprises an outer sleeve, an upper pull variable shell, a lower pull variable shell, bidirectional anti-seismic protrusions and a deformation energy dissipation block.

[0012] The inner anchor rod is connected with a tensile corrosion-resistant anchoring end, and the outer anchor rod is connected with an embedded corrosion-resistant anchoring end head; the inner anchor rod and the outer anchor rod are both provided with axial perforations for penetrating sensor connecting lines, corrosion-resistant oil flow channels and slurry injection channels containing self-repairing microbial capsules.

[0013] Preferably, the height of the bidirectional anti-seismic protrusion is 1 / 3 to 1 / 2 of the diameter of the inner anchor rod and the outer anchor rod. The following formula is satisfied:

[0014] ;

[0015] wherein, is a safety factor, is a partition edge length (mm), is a site vibration load (MPa), is a shell yield strength (MPa); L f is an inner anchor rod and outer anchor rod diameter (mm); is a reduction factor considering the joint work of multiple protrusions; n is the number of bidirectional anti-seismic protrusions on a single anchor rod.

[0016] Preferably, the maximum protruding length of the deformation energy dissipation block is 1 / 3 to 1 / 2 of the diameter of the inner anchor rod and the outer anchor rod. The following formula is satisfied:

[0017] ;

[0018] wherein, is a bidirectional anti-seismic protrusion height (mm); M is an anchor rod bearing capacity (MPa); L f is an inner anchor rod and outer anchor rod diameter (mm); is a deformation safety factor; is a yield strength design value (MPa) of the upper pull variable shell and the lower pull variable shell of the bidirectional anti-seismic high-strength dead load shear device; is a reduction factor considering the joint work of multiple protrusions; n is the number of bidirectional anti-seismic protrusions on a single anchor rod.

[0019] Preferably, the bidirectional anti-seismic high-strength constant load shear device further comprises a first tension cable sensor, a second tension cable sensor, an electromagnetic sensor, and a rubber sealing ring; the first tension cable sensor and the second tension cable sensor are respectively fixed to tail ends of the inner anchor rod and the outer anchor rod to monitor displacement of the rod body; the electromagnetic sensor is installed on the outer wall of the outer sleeve to detect rock mass vibration signals; and the rubber sealing ring is sleeved on positions where the inner anchor rod and the outer anchor rod pass through the outer sleeve to prevent anticorrosive oil from leaking.

[0020] Preferably, the tension anticorrosion anchoring end comprises an anchoring end nut, an expansion anchoring block, a wall breaking support block triggering device, an upper and lower symmetrical wall breaking support block with a hinge, and a water pressure sensor; the anchoring end nut is threadedly connected to the top end of the inner anchor rod and presses the expansion anchoring block through axial pressure to make the expansion anchoring block radially expand; the wall breaking support block triggering device is fixed to the surface of the inner anchor rod and is hinged to the hinge, and the wall breaking support block can be rotatably unfolded through the hinge, and the unfolding angle is controlled by tensile stress; the water pressure sensor is embedded in the head of the anchoring end, and a connecting line thereof extends to an external monitoring terminal through a through hole of the inner anchor rod; the water pressure sensor monitors water seepage pressure of the anchor hole in real time, and the connecting line of the sensor is led out through the through hole of the anchor rod.

[0021] Preferably, the wall breaking support block unfolding mechanism of the tension anticorrosion anchoring end is as follows:

[0022] When the inner anchor rod is subjected to tension, the expansion anchoring block radially expands to trigger the wall breaking support block triggering device.

[0023] The hinge pushes the wall breaking support block to rotate and unfold outward, and the unfolding angle is positively correlated with tensile stress, and the unfolding angle ranges from 0° to 90°. .

[0024] Preferably, the embedded anticorrosion anchoring end head comprises a partition plate, a variable cross-section cylindrical anchor head, an anode consumable, an oil storage chamber, and a wideband acoustic signal sensor; the partition plate is welded to the tail end of the outer anchor rod, a variable cross-section circular hole is formed in the center of the partition plate, the front end of the variable cross-section cylindrical anchor head is a conical structure, passes through the circular hole of the partition plate, and is threadedly connected to the outer anchor rod; the anode consumable is a zinc block, which is welded to the side of the partition plate to form a sacrificial anode protection circuit with the metal part of the anchor rod; the oil storage chamber is arranged at the tail of the variable cross-section cylindrical anchor head and is in communication with the through hole of the anchor rod through the middle hole of the rubber pad layer; the wideband acoustic signal sensor is embedded in the tail end of the outer anchor rod, and a signal line thereof is connected to an external monitoring system through the through hole of the anchor rod to monitor development of surrounding rock fissures; and the embedded anticorrosion anchoring end head further comprises a concrete protective layer, which is wrapped outside the variable cross-section cylindrical anchor head to enhance corrosion resistance and impact resistance of the anchor rod.

[0025] Preferably, the dynamic supplement path of the corrosion protection oil is that the corrosion protection oil in the oil storage chamber passes through the rubber pad layer opening, the outer anchor rod perforation, the shear device cavity and the inner anchor rod perforation in sequence to form a corrosion protection oil film covering the entire length of the anchor rod.

[0026] Preferably, the system injects a slurry containing self-repairing microbial capsules through high-pressure grouting, the microbial capsules are activated after the slurry is solidified, and calcium carbonate is generated through the solidification of the biological calcium source to repair the anchor rod and the surrounding rock fissures.

[0027] The bidirectional anti-seismic high-energy-consumption anti-shear corrosion self-healing anchoring construction method provided by the application is applied to the bidirectional anti-seismic high-energy-consumption anti-shear corrosion self-healing anchoring system as described in any one of the above embodiments, and the construction method comprises the following steps:

[0028] S1: determining the maximum bearing capacity M of a single anchor rod and the highest vibration load of the site according to the engineering site , calculating the bidirectional anti-seismic protrusion height and the deformation energy dissipation block length ;

[0029] S2: embedding the bidirectional anti-seismic protrusions at the tail of the inner anchor rod and the outer anchor rod into the down-pull variable shell groove, bolt-fastening the up-pull variable shell and the down-pull variable shell to form a cavity, and pressing the outer sleeve into the inner sleeve; installing the first pull wire sensor and the second pull wire sensor at the tail of the anchor rod, and fixing the electromagnetic sensor on the outer wall of the outer sleeve;

[0030] S3: drilling a hole in the surrounding rock, the hole diameter matching the outer diameter of the anchoring system; implanting the anchoring system, with the corrosion protection anchoring end being pulled towards the hole opening and the embedded corrosion protection end being towards the hole bottom;

[0031] S4: high-pressure injection of cement mortar containing urease microbial capsules, solidification into the oil storage chamber, and formation of a full-length oil film through the outer anchor rod perforation, the shear device cavity and the inner anchor rod perforation;

[0032] S5: applying a prestress to the design value, triggering the expansion of the pressure expansion anchoring block, and pushing the broken wall supporting block to expand and contact the surrounding rock; adjusting the anchor rod tension to ensure the work of the bidirectional anti-seismic protrusion sliding interface;

[0033] S6: connecting the water pressure sensor, the first pull wire sensor, the second pull wire sensor, the wideband acoustic signal sensor and the electromagnetic sensor to the monitoring terminal to real-time feedback the water seepage pressure, displacement, fissure and vibration signals.

[0034] In the application, the bidirectional anti-seismic high-energy-consumption anti-shear corrosion self-healing anchoring system and the construction method thereof are provided, and the deformation energy consumption block of the bidirectional anti-seismic high-strength dead load anti-shear device moves under the sleeve in the stress state of the anchor rod. The anchoring system can have large deformation under high stress, has good ductility, can adapt to engineering needs, and is particularly prone to large deformation in extreme conditions such as earthquakes, so as to ensure that the anchoring device does not have brittle failure and the engineering safety is ensured. The corrosion protection measures such as repairable slurry filling, structure oil filling, and sacrificial anode material protection are used to ensure the corrosion protection needs of the anchoring system which needs to work underground for a long time, cope with the long-term corrosion effect of the anchoring device in the complex underground environment, and meet the requirements of the whole life cycle of modern engineering.

[0035] By dividing the anchor rod into two parts and specially protecting the divided parts, when the anchoring system faces the dislocation of large fissures or structural planes in the surrounding rock mass, the anchoring system can bear the shear stress generated by the dislocation of the surrounding rock, avoiding shear failure, and in extreme cases, the anchoring system is completely sheared off, and the two parts of the anchor rod can also work independently, ensuring that the device is completely reliable. The bidirectional anti-seismic protruding structure of the bidirectional anti-seismic high-strength dead load anti-shear device is used to ensure that the prestress of the anchoring system will not be lost due to vibration loads caused by factors such as engineering excavation and earthquakes. BRIEF DESCRIPTION OF DRAWINGS

[0036] Fig. 1 The bidirectional anti-seismic high-energy-consumption anti-shear corrosion self-healing anchoring system is provided.

[0037] Fig. 2 The bidirectional anti-seismic high-energy-consumption anti-shear corrosion self-healing anchoring system is provided.

[0038] Fig. 3 The bidirectional anti-seismic high-energy-consumption anti-shear corrosion self-healing anchoring system is provided.

[0039] Fig. 4 The bidirectional anti-seismic high-energy-consumption anti-shear corrosion self-healing anchoring system is provided.

[0040] Fig. 5 The bidirectional anti-seismic high-energy-consumption anti-shear corrosion self-healing anchoring system is provided.

[0041] Fig. 6 The bidirectional anti-seismic high-energy-consumption anti-shear corrosion self-healing anchoring system is provided.

[0042] Legend: 101, anchor end nut; 102, expansion anchor block; 103, wall breaking support block trigger device; 104, hinge; 105, wall breaking support block; 106, water pressure sensor; 107, inner anchor rod through sensor; 201, inner anchor rod; 202, outer anchor rod; 301, outer sleeve; 302, upper pull variable shell; 303, bidirectional anti-seismic protrusion; 304, deformation energy dissipation block; 305, lower pull variable shell; 306, rubber sealing ring; 307, electromagnetic sensor; 308, first pull wire sensor; 309, second pull wire sensor; 310, through sensor; 401, partition; 402, anode material; 403, concrete protective layer; 404, variable cross-section cylindrical anchor head; 405, rubber pad; 406, wideband acoustic signal sensor; 407, oil storage chamber; 408, outer anchor rod through sensor. DETAILED DESCRIPTION

[0043] Reference Figs. 1-6 The bidirectional anti-seismic high-energy dissipation anti-corrosion self-healing anchoring system includes:

[0044] The split-type perforated anchor rod includes an inner anchor rod 201 and an outer anchor rod 202, which are mechanically coupled by a bidirectional anti-seismic high-strength constant load shear device.

[0045] The bidirectional anti-seismic high-strength constant load shear device includes an outer sleeve 301, an upper pull variable shell 302, a lower pull variable shell 305, a bidirectional anti-seismic protrusion 303, and a deformation energy dissipation block 304. The bidirectional anti-seismic protrusion 303 is a continuous trapezoidal boss, symmetrically distributed at the tail of the inner anchor rod 201 and the outer anchor rod 202, and embedded in the matching grooves of the upper pull variable shell 302 and the lower pull variable shell 305, forming a sliding friction interface. The deformation energy dissipation block 304 is a polygonal variable cross-section rotating body, in contact with the inner walls of the upper pull variable shell 302 and the lower pull variable shell 305, and plastically deformed to absorb energy when under pressure. The upper pull variable shell 302 and the lower pull variable shell 305 are fixed by bolts to form a cavity, and are pressed into the outer sleeve 301 by hydraulic pressure. The outer sleeve 301 is gap-fitted with the upper pull variable shell 302 and the lower pull variable shell 305.

[0046] In this embodiment, the bidirectional anti-seismic high-strength constant load shear device further includes a first pull wire sensor 308, a second pull wire sensor 309, an electromagnetic sensor 307, and a rubber sealing ring 306. The first pull wire sensor 308 and the second pull wire sensor 309 are respectively fixed at the tail ends of the inner anchor rod 201 and the outer anchor rod 202 to monitor the displacement of the rod body. The electromagnetic sensor 307 is installed on the outer wall of the outer sleeve 301 to detect rock vibration signals. The rubber sealing ring 306 is sleeved at the position where the inner anchor rod 201 and the outer anchor rod 202 pass through the outer sleeve 301 to prevent the leakage of corrosion-resistant oil.

[0047] Specifically, both the bidirectional seismic-resistant protrusion 303 and the deformation energy-dissipating block 304 are integrally cast high-strength anchor rods, possessing excellent rigidity and strength. The bidirectional seismic-resistant protrusion 303 is a continuous trapezoidal protrusion structure symmetrically distributed above and below the anchor rod. The deformation energy-dissipating block 304 is a polygonal variable cross-section rotating body. The inner anchor rod 201 and the outer anchor rod 202 have identical bidirectional seismic-resistant protrusions 303 and deformation energy-dissipating blocks 304 at their tails. The inner anchor rod 201 is connected to the anchoring end, and the outer anchor rod 202 is connected to the anchor head. Both anchor rods have through holes, housing a through-hole sensor 310. The upper pull-up transformer housing 302 and the lower pull-down transformer housing 305 are completely symmetrical and have pre-set cavities that match the bidirectional seismic-resistant protrusion 303 and the deformation energy-dissipating block 304. There is a certain cavity between the inner anchor rod 201 and the outer anchor rod 202. A first... A pull-wire sensor 308 and a second pull-wire sensor 309 are used to detect the tensile and shear displacements of the anchor rods. During installation, the protruding parts of the inner anchor rod 201 and the outer anchor rod 202 are first fitted with the lower pull-out transformer housing 305, and then the upper pull-out transformer housing 302 is fitted onto the lower pull-out transformer housing 305. The diameter of the outer sleeve 301 should be slightly smaller than the diameter of the cylinder after the upper pull-out transformer housing 302 and the lower pull-out transformer housing 305 are assembled. A hydraulic device is used to press the cylinder after the upper pull-out transformer housing 302 and the lower pull-out transformer housing 305 are assembled into the outer sleeve 301. An electromagnetic sensor 307 is installed on the outside of the outer sleeve to detect the vibration information of the anchor rod at the fracture zone 6. After installation, the cavity of this device should be filled with anti-corrosion oil to protect the internal structure. A rubber sealing ring 306 is installed at the point where the anchor rod passes through the bidirectional anti-seismic deformation energy dissipation adaptive system to seal the cavity.

[0048] The inner anchor rod 201 is connected to the tension anti-corrosion anchoring end, and the outer anchor rod 202 is connected to the embedded anti-corrosion anchoring end. Both the inner anchor rod 201 and the outer anchor rod 202 are provided with axial through holes for passing through sensor connection wires, anti-corrosion oil flow channels and slurry injection channels containing self-healing microbial capsules.

[0049] In this embodiment, the height of the bidirectional seismic-resistant protrusion 303 is... Satisfy the following formula:

[0050] ;

[0051] in, The height (mm) of the bidirectional seismic protrusion 303; For safety factor; This is the side length of the partition; The site vibration load is (MPa). The outer shell yield strength (MPa); L f The diameter (mm) of the inner and outer anchor bolts; n is the reduction coefficient considering the joint work of multiple protrusions; n is the number of bidirectional seismic protrusions on a single anchor rod.

[0052] In the embodiment, the maximum protruding length (mm) of the deformation energy dissipation block 304 is The following formula is satisfied:

[0053] ;

[0054] Wherein, The maximum protruding length (mm) of the deformation energy dissipation block 304; M is the bearing capacity of the anchor rod (MPa); is the deformation safety factor; L f is the diameter of the inner anchor rod and the outer anchor rod (mm); n is the reduction coefficient considering the joint work of multiple protrusions; n is the number of bidirectional seismic protrusions on a single anchor rod.

[0055] In the embodiment, the tensile corrosion-resistant anchoring end includes an anchoring end nut 101, an expansion anchoring block 102, a wall-breaking support block triggering device 103, an upper and lower symmetrical wall-breaking support block 105 with a hinge 104, and a water pressure sensor 106. The anchoring end nut 101 is threadedly connected to the top end of the inner anchor rod 201 and is pressed in the axial direction to extrude the expansion anchoring block 102, so that the expansion anchoring block 102 expands radially. The wall-breaking support block triggering device 103 is fixed to the surface of the inner anchor rod 201 and is hingedly connected to the hinge 104. The wall-breaking support block 105 can be rotated and unfolded through the hinge 104, and the unfolding angle is controlled by the tensile stress. The water pressure sensor 106 is embedded in the head of the anchoring end, and its connecting line extends to the external monitoring terminal through the perforation of the inner anchor rod 201. The water pressure sensor 106 monitors the water seepage pressure of the anchor hole in real time, and the sensor connecting line is led out through the perforated anchor rod.

[0056] In the embodiment, the unfolding mechanism of the wall-breaking support block 105 of the tensile corrosion-resistant anchoring end is as follows:

[0057] When the inner anchor rod 201 is in tension, the expansion anchoring block 102 expands radially to trigger the wall-breaking support block triggering device 103.

[0058] The hinge 104 pushes the wall-breaking support block 105 to rotate and unfold outward, and the unfolding angle is positively correlated with the tensile stress, and the unfolding angle ranges from .

[0059] Specifically, when the inner anchor rod 201 is pulled, the anchor end nut 101 will extrude the expansion anchor block 102, which will deform under pressure, generating extrusion anchoring force with the anchor hole, and at the same time triggering the wall breaking support block trigger device 103 on the inner anchor rod 201, so that the three groups of wall breaking support blocks 105 symmetrically distributed on the inner anchor rod 201 will be broken and opened under the action of the hinge 104, providing sufficient anchoring force for the entire anchoring system. At the same time, the wall breaking support block 105 gradually increases the opening angle with the inner anchor rod 201 under tension, and the anchoring force gradually increases, so as to realize complete anchoring. The water pressure sensor 106 is installed at the end of the anchor end, which is used to detect the surrounding rock environment of the anchor rod. The sensor connection line is connected from the perforation of the inner anchor rod 201 and the outer anchor rod 202, and the inner anchor rod 201 is provided with an inner anchor rod through sensor 107 to monitor the stress state of the inner anchor rod 201.

[0060] In the embodiment, the embedded corrosion-resistant anchor end includes a partition plate 401, a variable cross-section cylindrical anchor head 404, an anode material 402, an oil storage chamber 407, and a broadband acoustic signal sensor 406. The partition plate 401 is welded to the end of the outer anchor rod 202, with a variable cross-section circular hole in the center. The front end of the variable cross-section cylindrical anchor head 404 is a conical structure, which passes through the circular hole of the partition plate 401 and is threadedly connected with the outer anchor rod 202. The anode material 402 is a zinc block, which is welded to the side of the partition plate 401 and forms a sacrificial anode protection circuit with the metal part of the anchor rod. The oil storage chamber 407 is arranged at the tail of the variable cross-section cylindrical anchor head 404, and is communicated with the anchor rod perforation through the middle hole of the rubber pad 405. The broadband acoustic signal sensor 406 is embedded at the end of the outer anchor rod 202, and its signal line is connected to the external monitoring system through the anchor rod perforation, which is used to monitor the development of surrounding rock cracks. The embedded corrosion-resistant anchor end also includes a concrete protective layer 403, which is wrapped outside the variable cross-section cylindrical anchor head 404, and is used to enhance the corrosion resistance and impact resistance of the anchor rod.

[0061] Specifically, the variable cross-section cylindrical anchor head 404 is composed of two parts, the front end is a linear variable cross-section circular truncated cone, the tail is a cylinder, and a threaded hole is opened in the whole variable cross-section cylindrical anchor head 404; the anode consumable 402 is a zinc block welded on the side of the high-strength steel partition plate 401, a variable cross-section circular hole is dug in the middle of the partition plate 401, the maximum diameter of the hole is less than the maximum diameter of the variable cross-section cylindrical anchor head 404, and the minimum diameter of the hole is approximately equal to the minimum diameter of the variable cross-section cylindrical anchor head 404; during installation, the partition plate 401 is attached to the surrounding rock through the anchor rod, the variable cross-section cylindrical anchor head 404 is fixed on the threaded anchor rod by using a special high-torque electric drill, and it should be ensured that the front end of the variable cross-section cylindrical anchor head 404 completely penetrates the partition plate 401, the rubber pad 405 is placed at the tail of the variable cross-section cylindrical anchor head, and a hole is opened in the middle so that the corrosion-resistant oil in the oil storage chamber 407 can flow into the perforation of the outer anchor rod 202, thereby supplementing the possible leakage of the corrosion-resistant oil in the internal cavity of the bidirectional anti-seismic deformation energy dissipation self-adaptive system, and at the same time, the contact surface between the variable cross-section cylindrical anchor head 404 and the surrounding rock 5 is separated, reducing the penetration of water. The outer anchor rod through sensor 408 is installed near the end of the outer anchor rod 202 to monitor the stress of the outer anchor rod 202, and the broadband acoustic signal sensor 406 is installed at the end of the outer anchor rod 202 to monitor the crack development of the rock mass around the anchor rod, thereby providing protection for engineering safety.

[0062] It should be noted that the concrete protective layer 403 cooperates with the corrosion-resistant oil and the self-repairing microbial capsule slurry in the oil storage chamber 407 to form a three-level corrosion-resistant barrier.

[0063] In this embodiment, the dynamic supplementing path of the corrosion-resistant oil is as follows: the corrosion-resistant oil in the oil storage chamber 407 passes through the openings of the rubber pad layer 405, the perforation of the outer anchor rod 202, the cavity of the shear device, and the perforation of the inner anchor rod 201 in sequence, and covers the entire length of the anchor rod to form a corrosion-resistant oil film.

[0064] Specifically, the system injects the slurry containing self-repairing microbial capsules through high-pressure grouting, the microbial capsules are activated after the slurry is solidified, and calcium carbonate is generated through the solidification of biological calcium source, which repairs the cracks of the anchor rod and the surrounding rock.

[0065] Referring to Figs. 1-6 , the bidirectional anti-seismic high-energy dissipation shear corrosion-resistant self-healing anchoring construction method provided by the present application is applied to the bidirectional anti-seismic high-energy dissipation shear corrosion-resistant self-healing anchoring system of any one of the above, and the construction method comprises the following steps:

[0066] S1: determining the maximum bearing capacity M of a single anchor rod and the highest vibration load of the site according to the engineering site , and calculating the bidirectional anti-seismic protrusion height and the deformation energy dissipation block length .

[0067] Specifically, the main structural dimensions and related parameters of the device are designed according to the engineering situation:

[0068] (1) Determine the height of the two-way anti-seismic protrusion 303 in the two-way anti-seismic high-strength constant load shear device , to ensure that the entire anchor rod does not vibrate inside the device when subjected to vibration load, the calculation process is as follows:

[0069] ;

[0070] ;

[0071] ;

[0072] Therefore: ;

[0073] wherein, represents the maximum vibration force (KN) that all two-way anti-seismic protrusions on a single anchor rod (inner anchor rod or outer anchor rod) can withstand, is the maximum vibration force (KN) that a single two-way anti-seismic protrusion can withstand, is a reduction factor considering the joint work of multiple two-way anti-seismic protrusions, n is the number of two-way anti-seismic protrusions on a single anchor rod, is the yield strength design value (MPa) of the upper and lower variable outer shells of the two-way anti-seismic high-strength constant load shear device, is the cross-sectional area of the two-way anti-seismic protrusion part (mm 2 ), is a safety amplification factor (value greater than 1).

[0074] (2) Determine the maximum protruding part radius of the deformation energy block 304 in the two-way anti-seismic high-strength constant load shear device , to ensure that the deformation energy block 304 can be pressed to bend the upper and lower variable outer shells 302, 305 to produce large deformation energy, and at this time the anchor rod will not be pulled apart, the calculation process is as follows:

[0075] ;

[0076] ;

[0077] ;

[0078] Therefore: ;

[0079] ;

[0080] wherein, is the maximum bearing capacity of the anchor rod (KN); is the yield strength design value of the anchor rod (MPa); The maximum pressure (KN) generated by the upper and lower variable housings 302 and 305 under the compression of the deformation energy block 304 in the bidirectional anti-seismic high-strength constant load shear device; L b The maximum cross-sectional thickness (mm) of the protruding part of the deformation energy block 304; S 屈服面 The extrusion contact area (mm 2 ) between the upper and lower variable housings 302 and 305 and the deformation energy block 304; F 屈 The maximum yield force (KN) generated by the extrusion deformation of the upper and lower variable housings 302 and 305 and the deformation energy block 304 under external force; F 摩 The friction force (KN) generated by the extrusion of the upper and lower variable housings 302 and 305 and the deformation energy block 304 and the bidirectional anti-seismic protrusion 303; M is the anchoring force (MPa). Considering that although the cavity is filled with oil, some contact surfaces will still generate a certain friction force and safety design principles, a safety factor ( ) greater than 1 is introduced here.

[0081] (3) Determine the relative shear displacement and the relative horizontal displacement of the inner and outer anchoring rods 201 and 202 in the bidirectional anti-seismic high-strength constant load shear device:

[0082] According to the geometric relationship, it is obvious that:

[0083]

[0084] wherein, , are the initial lengths (mm) of the first and second pull wire sensors 308 and 309; L a are the horizontal initial distances (mm) of the first and second pull wire sensors 308 and 309; , are the elongations (mm) of the first and second pull wire sensors 308 and 309 after the anchoring rods are subjected to tensile shear.

[0085] S2: Embed the bidirectional anti-seismic protrusion 303 at the tail of the inner and outer anchoring rods 201 and 202 into the recess of the lower variable housing 305, bolt the upper and lower variable housings 302 and 305 to form a cavity, and press the outer sleeve 301 into the cavity; install the first and second pull wire sensors 308 and 309 at the tail of the anchoring rods, and fix the electromagnetic sensor 307 on the outer wall of the outer sleeve 301.

[0086] S3: Drilling in surrounding rock, hole diameter matching outer diameter of anchoring system; implanting anchoring system, stretching corrosion-resistant anchoring end towards hole opening, and embedding corrosion-resistant end head towards hole bottom.

[0087] S4: High-pressure injection of urea-containing microbial capsule cement mortar, after solidification, oil injection to oil storage chamber 407, corrosion-resistant oil forming full-length oil film through outer anchor rod 202 perforation, shear device cavity, and inner anchor rod 201 perforation.

[0088] S5: Applying prestress to design value, triggering expansion of pressure expansion anchoring block 102, pushing broken wall supporting block 105 to expand contact with surrounding rock; adjusting anchor rod tension to ensure sliding interface work of bidirectional anti-seismic protrusion 303.

[0089] S6: Connecting water pressure sensor 106, first tension cable sensor 308, second tension cable sensor 309, wideband acoustic signal sensor 406, and electromagnetic sensor 307 to monitoring terminal, real-time feedback of water seepage pressure, displacement, crack, and vibration signals.

[0090] Specifically, for late monitoring and maintenance, water pressure sensor 106 is used to monitor water seepage inside the anchor hole, inner anchor rod through sensor 107, outer anchor rod through sensor 408, and through sensor 310 are used to monitor stress conditions of different parts of the anchor rod, first tension cable sensor 308 and second tension cable sensor 309 are used to monitor displacement conditions of the anchor rod under tension and shear action, wideband acoustic signal sensor 406 is used to monitor crack development and damage of surrounding rock mass around the anchor hole, and electromagnetic sensor 307 is used to monitor rock mass vibration signals.

[0091] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical solution and inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A bidirectional seismic high energy dissipation shear resistant corrosion resistant self healing anchoring system characterized in that, The application relates to a split-type perforated inner anchor rod and outer anchor rod. The split-type perforated inner anchor rod and outer anchor rod comprise an inner anchor rod (201) and an outer anchor rod (202), the inner anchor rod (201) and the outer anchor rod (202) are split-type independent structures, and the two are mechanically coupled through a bidirectional anti-seismic high-strength constant-load shear device. The bidirectional anti-seismic high-strength constant-load shear device comprises an outer sleeve (301), an upper pull variable shell (302), a lower pull variable shell (305), a bidirectional anti-seismic protrusion (303) and a deformation energy dissipation block (304); the bidirectional anti-seismic protrusion (303) is a continuous trapezoidal boss and is symmetrically distributed at tail portions of the inner anchor rod (201) and the outer anchor rod (202) and embedded into matching grooves of the upper pull variable shell (302) and the lower pull variable shell (305) to form a sliding friction interface; the deformation energy dissipation block (304) is a polygonal variable cross-section rotary body and in contact with inner walls of the upper pull variable shell (302) and the lower pull variable shell (305), and is plastically deformed to absorb energy when being pressed; the upper pull variable shell (302) and the lower pull variable shell (305) are fixed through bolts to form a cavity and are pressed into the outer sleeve (301) through hydraulic pressure, and the outer sleeve (301) is gap-fitted with the upper pull variable shell and the lower pull variable shell. The bidirectional anti-seismic high-strength constant-load shear device further comprises a tension cable sensor I (308), a tension cable sensor II (309), an electromagnetic sensor (307) and a rubber sealing ring (306); the tension cable sensor I (308) and the tension cable sensor II (309) are respectively fixed at tail ends of the inner anchor rod (201) and the outer anchor rod (202) to monitor rod body displacement; the electromagnetic sensor (307) is installed on an outer wall of the outer sleeve (301) and used for detecting rock mass vibration signals; and the rubber sealing ring (306) is sleeved at positions, where the inner anchor rod (201) and the outer anchor rod (202) pass through the outer sleeve (301), to prevent anticorrosive oil leakage. The inner anchor rod (201) is connected with a tensile anticorrosive anchoring end, and the outer anchor rod (202) is connected with an embedded anticorrosive anchoring end head; the inner anchor rod and the outer anchor rod are both provided with axial perforations for passing sensor connecting lines, anticorrosive oil flow channels and slurry injection channels containing self-repairing microbial capsules.

2. The bidirectional seismic high-dissipative shear resistant corrosion resistant self healing anchoring system according to claim 1, characterized in that, The height of the bidirectional anti-vibration protrusion (303) satisfies the following formula: ； wherein, Height of bidirectional anti-seismic protrusion (mm); is a safety factor; is a length of the partition (mm); is a site vibration load (MPa); is a yield strength of the shell (MPa); L f is a diameter of the inner and outer anchor rods (mm); is a reduction factor considering the work of multiple protrusions together; n is the number of bidirectional anti-seismic protrusions on a single anchor rod.

3. The bidirectional seismic high-dissipative shear resistant corrosion resistant self-healing anchoring system according to claim 2, characterized in that, a maximum protrusion length of the metamorphic energy dissipation block (304) satisfies the following formula: ； wherein, Height of bidirectional anti-seismic protrusion (mm); M is the bearing capacity of anchor rod (MPa); L f Diameter of inner anchor rod and outer anchor rod (mm); Deformation safety factor; Yield strength design value of upper and lower pull variable shell of bidirectional anti-seismic high-strength constant load shear device (MPa); Reduction factor considering the joint work of multiple protrusions; n is the number of bidirectional anti-seismic protrusions on a single anchor rod.

4. The bidirectional seismic high-dissipative shear resistant corrosion resistant self healing anchoring system according to claim 1, wherein, The tensile anticorrosive anchoring end comprises an anchoring end nut (101), an expansion anchoring block (102), a wall-breaking support block triggering device (103), up-and-down symmetric wall-breaking support blocks (105) with hinges (104) and a water pressure sensor (106); the anchoring end nut (101) is threadedly connected to a top end of the inner anchor rod (201) and presses and expands the expansion anchoring block (102) through axial pressure to make the expansion anchoring block (102) expand radially; the wall-breaking support block triggering device (103) is fixed to a surface of the inner anchor rod (201) and hinged to the hinges (104), the wall-breaking support blocks (105) can be rotatably unfolded through the hinges (104), and an unfolding angle is controlled by tensile stress; and the water pressure sensor (106) is embedded in the anchoring end head and has a connecting line extending to an external monitoring terminal through the perforation of the inner anchor rod (201); the water pressure sensor (106) monitors water seepage pressure of an anchor hole in real time, and the sensor connecting line is led out through the perforated anchor rod.

5. The bidirectional seismic high-dissipative shear resistant corrosion resistant self-healing anchoring system according to claim 4, wherein, The mechanism for unfolding the wall-breaking support block (105) of the tensile corrosion-resistant anchoring end is: When the inner anchor rod (201) is in tension, the pressure-expanding anchoring block (102) expands radially to trigger the wall-breaking support block triggering device (103); The hinge (104) pushes the wall breaking support block (105) to rotate outwardly and unfold, the unfolding angle positively correlated with the tensile stress, the unfolding angle ranging from .

6. The bidirectional seismic high-dissipative shear resistant corrosion resistant self-healing anchoring system according to claim 1, wherein, The embedded corrosion-resistant anchoring end head comprises a partition plate (401), a variable cross-section cylindrical anchor head (404), an anode consumable (402), an oil storage chamber (407), and a wideband acoustic signal sensor (406). The partition plate (401) is welded to the end of the outer anchor rod (202), and a variable cross-section circular hole is formed in the center thereof. The variable cross-section cylindrical anchor head (404) has a conical structure at the front end thereof, penetrates through the circular hole of the partition plate (401), and is threadedly connected with the outer anchor rod (202). The anode consumable (402) is a zinc block, which is welded to the side edge of the partition plate (401) and forms a sacrificial anode protection circuit with the metal part of the anchor rod. The oil storage chamber (407) is arranged at the tail of the variable cross-section cylindrical anchor head (404) and is in communication with the anchor rod perforation through the middle opening of the rubber pad layer (405). The wideband acoustic signal sensor (406) is embedded in the end of the outer anchor rod (202), and the signal line thereof is connected to an external monitoring system through the anchor rod perforation, for monitoring the development of the surrounding rock fissure. The embedded corrosion-resistant anchoring end head further comprises a concrete protective layer (403) wrapped outside the variable cross-section cylindrical anchor head (404), for enhancing the corrosion resistance and impact resistance of the anchor rod.

7. The bidirectional seismic high-dissipative shear resistant corrosion resistant self-healing anchoring system according to claim 6, characterized in that, The dynamic supplement path of the corrosion-resistant oil is that the corrosion-resistant oil in the oil storage chamber (407) sequentially passes through the opening of the rubber pad layer (405), the outer anchor rod (202) perforation, the shear-resistant device cavity, and the inner anchor rod (201) perforation, to form a corrosion-resistant oil film covering the full length of the anchor rod.

8. The bidirectional seismic high-dissipative shear resistant corrosion resistant self-healing anchoring system according to claim 1, characterized in that, The system injects a slurry containing self-repairing microbial capsules through high-pressure grouting, and after the slurry is solidified, the microbial capsules are activated to secrete calcium carbonate to repair the anchor rod and the surrounding rock fissure.

9. A two-way seismic high energy dissipation shear resistant corrosion resistant self-healing anchoring construction method, characterized in that, The construction method is applied to the bidirectional anti-seismic high-energy-consumption shear-resistant corrosion-resistant self-healing anchoring system as claimed in claim 6 or 7, and comprises the following steps: S1: Determine the maximum bearing capacity M of single anchor rod and the highest vibration load of the site according to the engineering site , and calculate the height of the two-way anti-seismic protrusion and the length of the deformation energy dissipation block ; S2: embedding the bidirectional anti-seismic protrusions (303) at the tails of the inner anchor rod (201) and the outer anchor rod (202) into the grooves of the lower pull variable shell (305), screwing and fixing the upper pull variable shell (302) and the lower pull variable shell (305) to form a cavity, and pressing the outer sleeve (301) into the cavity through hydraulic pressure; installing the pull wire sensor I (308) and the pull wire sensor II (309) at the tail of the anchor rod, and fixing the electromagnetic sensor (307) to the outer wall of the outer sleeve (301); S3: drilling in the surrounding rock, matching the hole diameter with the outer diameter of the anchoring system; implanting the anchoring system, with the tensile corrosion-resistant anchoring end facing the hole opening and the embedded corrosion-resistant end head facing the hole bottom; S4: high-pressure injection of cement mortar containing urease microbial capsules, oil injection into the oil storage chamber (407) after solidification, and formation of a full-length oil film through the outer anchor rod (202) perforation, the shear-resistant device cavity, and the inner anchor rod (201) perforation; S5: applying a prestress to a design value, triggering the pressure-expanding anchoring block (102) to expand and push the wall-breaking support block (105) to unfold and contact the surrounding rock; adjusting the anchor rod tension to ensure the sliding interface of the bidirectional anti-seismic protrusions (303) to work. S6: connecting water pressure sensor (106), pull wire sensor I (308), pull wire sensor II (309), broadband acoustic signal sensor (406) and electromagnetic sensor (307) to monitoring terminal, real-time feedback of water seepage pressure, displacement, crack and vibration signals.

Images