CN210370737U - Anchor rod-anchor cable support system capable of bearing large deformation of tunnel - Google Patents
Anchor rod-anchor cable support system capable of bearing large deformation of tunnel Download PDFInfo
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- CN210370737U CN210370737U CN201921386371.2U CN201921386371U CN210370737U CN 210370737 U CN210370737 U CN 210370737U CN 201921386371 U CN201921386371 U CN 201921386371U CN 210370737 U CN210370737 U CN 210370737U
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- 238000004873 anchoring Methods 0.000 claims abstract description 195
- 239000011347 resin Substances 0.000 claims abstract description 83
- 229920005989 resin Polymers 0.000 claims abstract description 83
- 239000003795 chemical substances by application Substances 0.000 description 53
- 239000011435 rock Substances 0.000 description 34
- 238000000034 method Methods 0.000 description 16
- 230000000149 penetrating effect Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 8
- 238000010276 construction Methods 0.000 description 8
- 239000004570 mortar (masonry) Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Abstract
The utility model discloses an anchor rod-anchor cable support system capable of bearing large deformation of a tunnel, which comprises a plurality of anchor rod-anchor cable units and a plurality of anchor cable anchorage devices, wherein each anchor rod-anchor cable unit comprises a rotary type first anchoring and then injecting hollow anchor rods for being arranged in anchor holes, the front anchoring section rod body of the rotary type first anchoring and then injecting hollow anchor rods positioned at the inner sides of the anchor holes can be anchored through resin anchoring agents, and the rear anchoring section rod body can be anchored through grouting; the end anchorage device is arranged at one end of the rotary type first-anchoring and second-grouting hollow anchor rod, which is positioned at the inner side of the anchor hole; the anchor cable penetrates through the rotary type first-anchoring and then-injecting hollow anchor rod, one end of the anchor cable is anchored at the end part of the rotary type first-anchoring and then-injecting hollow anchor rod through an end anchorage device, and the other end of the anchor cable penetrates out of the head end of the rotary type first-anchoring and then-injecting hollow anchor rod; wherein the anchor lines of every two anchor rod-anchor line units are connected through an anchor line anchorage device and can be tensioned.
Description
Technical Field
The utility model relates to a tunnel support field, in particular to stock-anchor rope support system and application method that can bear the big deformation in tunnel.
Background
The anchor rod is a structure anchoring or rock-soil mass reinforcing one kind of tension rod system structure, divide into prestressed anchor rod and non-prestressed anchor rod, the prestressed anchor rod is an initiative support type, can transmit the tensile force to the stable or suitable rock-soil mass, thus anchor the structure together with the rock-soil mass or reinforce the rock-soil mass, the non-prestressed anchor rod is a passive support type, through deforming with the rock-soil mass jointly, thus play a role in reinforcing the rock-soil mass; the anchor bolt support is widely applied to projects such as tunnels and underground projects, side slopes, foundation pits and the like, is an important component of anchor spray support, improves the support efficiency of surrounding rocks, optimizes the bearing proportion of various supports, ensures the safety of engineering construction and saves the construction cost of the project.
In a large deformation tunnel, the anchor rod is often failed, and the failure reason is mainly caused by that the surrounding rock is deformed too much and exceeds the limit bearing capacity of the anchor rod, so that the anchor rod is damaged by tension, and therefore, the key is to improve the bearing capacity of the anchor rod and enable the anchor rod to bear larger surrounding rock load.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome that exist among the prior art in the tunnel warp greatly, because the country rock warp too big, surpassed the limit bearing capacity of stock, lead to the stock to take place to be drawn and destroy, the stock became invalid, loses the above-mentioned not enough of supporting ability, provides a stock-anchor rope support system and the application method that can bear the tunnel and warp greatly.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
an anchor-cable support system capable of bearing large deformation of a tunnel, comprising a plurality of anchor-cable units and a plurality of cable anchors, each of the anchor-cable units comprising:
the rotary type first-anchoring and second-injecting hollow anchor rod is arranged in the anchor hole, a front anchoring section rod body of the rotary type first-anchoring and second-injecting hollow anchor rod positioned on the inner side of the anchor hole can be anchored through a resin anchoring agent, and a rear anchoring section rod body can be anchored through grouting;
the end anchorage device is arranged at one end of the rotary type first-anchoring and second-grouting hollow anchor rod positioned at the inner side of the anchor hole;
the anchor cable penetrates through the rotary type first-anchoring and then-injecting hollow anchor rod, one end of the anchor cable is anchored at the end part of the rotary type first-anchoring and then-injecting hollow anchor rod through the end part anchorage device, and the other end of the anchor cable penetrates out of one end of the anchor head of the rotary type first-anchoring and then-injecting hollow anchor rod;
wherein the anchor line piercing portions of each two anchor-anchor line units are connected by one anchor line and can be tensioned.
The anchor rod-anchor cable support system is arranged at a position where large deformation occurs in a tunnel, and as the deformation of surrounding rock is gradually increased from the deep part of the surrounding rock to the inside of the tunnel, and the strength of a resin anchoring body is greater than that of a mortar anchoring body and an anchor rod body, after the mortar anchoring body is damaged, an anchor rod moves towards the deep part of the surrounding rock relative to the surrounding rock under the anchoring action of a resin anchoring agent, so that mutually connected anchor cables are gradually tightened until bearing tensile force; and at the moment, if the surrounding rock continues to deform, the tension of the anchor cable is further increased, the deformation pressure of the surrounding rock is borne through the tension of the anchor cable, and an anchor rod-anchor cable support system which mainly bears the pressure of the surrounding rock by the anchor cable and inhibits the deformation of the surrounding rock is formed at the position of the tunnel where large deformation occurs, so that the self-bearing capacity of the surrounding rock is improved. And selecting the number and the composition mode of the anchor rod-anchor cable units according to the area range of the tunnel with large deformation, and increasing the number of the anchor rod-anchor cable units and changing the mode of the mutual connection of the anchor cables when the area range of the large deformation is larger.
The rotary type hollow anchor rod body is characterized in that the front section of the rotary type first-anchoring and then-injecting hollow anchor rod body is quickly anchored by a resin anchoring agent, and then prestress can be applied to the rotary type first-anchoring and then-injecting hollow anchor rod body, and then grouting and anchoring are performed after prestress is applied to the rotary type first-anchoring and then-injecting hollow anchor rod body rear section.
Compare general stock, adopt a stock-anchor rope support system that can bear tunnel large deformation, except having advantages such as construction convenience, quick anchor, through stock-anchor rope unit interconnect between the anchor rope has avoided the unable problem that bears after tunnel large deformation department is destroyed of general stock, can also be according to the quantity and the connected mode of big deformation range nimble selection stock-anchor rope unit, both can be applicable to the reinforcement in the large deformation tunnel of minizone, also can be applicable to the strutting in large deformation tunnel on a large scale, can effectively control the country rock in tunnel and warp, improve the security in tunnel.
Preferably, the anchor line exit portions of two adjacent anchor-line units are connected by one anchor line anchor.
By adopting the structure, the device can be suitable for the working condition that the large deformation range is less than or equal to 1.5 m.
Preferably, the anchor line exit portions of two spaced anchor-anchor line units are connected by one anchor line anchor.
By adopting the structure, the device can be suitable for the working condition that the large deformation range is larger than 1.5 m.
Preferably, the anchor cable is an unbonded anchor cable, a sheath is sleeved outside the anchor cable, and the anchor cable and the sheath can slide relatively.
Further preferably, the surface of the anchor cable is provided with an anti-corrosion lubricating coating.
Preferably, each of the anchor rod-anchor cable units further includes an anchor head sleeve connected to one end of the anchor head of the rotary type first-anchoring and then-injecting hollow anchor rod, and the anchor cable penetrates out of the anchor head sleeve.
Further preferably, the anchor head sleeve is connected to the rotary type anchor-first-injection hollow anchor rod through threads.
Preferably, the front anchoring section rod body and the rear anchoring section rod body are connected through a perforated connector, a bearing plate is arranged on the outer wall of the front anchoring section rod body, and the anchor cable penetrates through the front anchoring section rod body, the perforated connector and the rear anchoring section rod body.
By adopting the structure, the front anchoring section rod body can be quickly anchored through the resin anchoring agent, the rotary type hollow anchor rod is firstly anchored and then injected for anchoring, then grouting is carried out in the rear anchoring section rod body, so that the rear anchoring section rod body is bonded in full length, the whole anchoring installation of the rotary type hollow anchor rod is quickly completed, the bearing plate can be used for bearing the pressure of a mortar anchoring body of the rear anchoring section rod body, and compared with the shearing force borne by the anchoring body of the existing anchor rod, the bearing capacity of the rotary type hollow anchor rod which is firstly anchored and then injected is enhanced.
Further preferably, one end of the front anchoring section rod body is connected with a toothed tool, the toothed tool comprises a toothed disc and a toothed cutter, the toothed tool and the ejector block are fixed through pressing, a through hole is formed in the ejector block, a hollow round rod is in interference fit with the through hole, one end of the round rod is connected with the end anchor, the other end of the round rod is inserted into the front anchoring section rod body, and the anchor cable penetrates through the round rod.
Further preferably, the fluted disc is connected to the end part of the front anchoring section rod body through threads.
Further preferably, the gear and the top block are in press clamping connection.
Further preferably, one end of the round rod, which is connected with the end anchor, is provided with a resin cover, the round rod penetrates through the resin cover and is fixed through interference fit, and the area between the resin cover and the top block is used for arranging a resin roll type anchoring agent.
By adopting the structure, the rotary type first-anchoring and second-injecting hollow anchor rod body can be pressed, pushed and rotated through machinery or tools matched with the rotary type first-anchoring and second-injecting hollow anchor rod, the rotary type first-anchoring and second-injecting hollow anchor rod rotates and pushes along the round rod under the rotating pressing and twisting action of the rotary type first-anchoring and second-injecting hollow anchor rod, the ejector block overcomes the friction force between the ejector block and the round rod, the ejector block breaks the resin roll type anchoring agent bag body, the resin roll type anchoring agent releases the resin anchoring agent, the tooth tool rotates along with the rotary type first-anchoring and second-injecting hollow anchor rod body, and the tooth tool stirs the resin anchoring agent uniformly, so that the resin anchoring agent forms the anchoring force to quickly anchor the rotary type first-anchoring and second-injecting hollow anchor rod body.
Further preferably, the resin cover is provided with at least one mounting cavity for mounting the resin roll type anchoring agent.
By adopting the structure, the resin roll type anchoring agent can be conveyed to the inner end part of the anchor hole under the protection of the resin cover, the resin roll type anchoring agent bag body is prevented from being crushed and punctured in the conveying process to release the resin anchoring agent in advance, and the front end of the rotary type first-anchoring and second-injecting hollow anchor rod is prevented from being anchored by the resin anchoring agent when the rotary type first-anchoring and second-injecting hollow anchor rod is not arranged in place.
Further preferably, all the installation cavities are uniformly distributed along the cross section of the resin cover.
Further preferably, the resin cover is a frustum body, and a vertex of the frustum body is arranged opposite to the round rod.
Further preferably, the top block is a cone, and the top of the cone faces the resin cover, so that the resin roll type anchoring agent bag body is pushed to the wall of the anchor hole and is broken when the top block is pushed.
Preferably, an opening of the anchor head sleeve penetrating out of the anchor cable is of a smooth arc structure.
By adopting the structure, the anchor cable is prevented from being locally damaged due to excessive stress concentration generated at the anchor head sleeve when the anchor cable bears tensile force.
Preferably, the outer wall of the rotary type first-anchoring and second-injecting hollow anchor rod is provided with external threads, and the thread adaptation of some structures is met firstly, so that the outer wall of the rotary type first-anchoring and second-injecting hollow anchor rod is rough, and the anchoring force is enhanced.
The utility model also provides a can bear the use method of the stock-anchor rope support system of tunnel large deformation, use as above arbitrary the support system, this use method:
the method comprises the steps of forming an anchor hole, and anchoring the anchor rod-anchor cable unit in the anchor hole;
comprising the step of connecting the anchor line piercing portions of each two of said bolt-anchor line units by means of one of said anchor line anchors.
Adopt a can bear stock-anchor rope of tunnel large deformation support system's application method, stock-anchor rope unit can be anchored fast, through stock-anchor rope unit the interconnect between the anchor rope for the stock can be through interconnect after tunnel large deformation department is destroyed the anchor rope suppresses the country rock and warp, improves the self-carrying capacity of country rock, the method step is simple, construction convenience, respond well.
Preferably, the method of use comprises the steps of:
A. forming an anchor hole, namely inserting a rotary type first-anchoring and then-injecting hollow anchor rod in the anchor rod-anchor cable unit and an anchor cable which is anchored through an end anchor and penetrates through the rotary type first-anchoring and then-injecting hollow anchor rod into the anchor hole to the bottom of the anchor hole;
B. connecting a connecting sleeve with the post-anchoring section rod body through internal threads, guiding the anchor cable to the outside of the rotary type first-anchoring and then-injecting hollow anchor rod from a circular opening on the side surface of the connecting sleeve, connecting the other end of the connecting sleeve with a drill rod connecting sleeve through external threads, connecting the other end of the drill rod connecting sleeve with a drill rod, driving the rotary type first-anchoring and then-injecting hollow anchor rod to rotate and push the rotary type first-anchoring and then-injecting hollow anchor rod to the inside of an anchor hole under the action of rotary propulsion of the drill rod, and overcoming the friction force between the top block and the round rod and rotating and pushing the top block along the round rod under the action of rotary pressure and torsion generated by the rotary type;
C. the jacking block breaks a resin roll type anchoring agent bag body, the resin roll type anchoring agent releases the resin anchoring agent, resin anchoring agent slurry is mixed, a tooth tool rotates along with the rotary type hollow anchor rod which is anchored firstly and then injected, a serrated knife on the tooth tool uniformly stirs the resin anchoring agent, and the rotary type front anchoring section rod body which is anchored firstly and then injected into the hollow anchor rod is quickly anchored;
D. after the rotary type first-anchoring and second-injecting hollow anchor rod body at the front anchoring section is anchored, grouting and anchoring the rotary type first-anchoring and second-injecting hollow anchor rod body at the rear anchoring section to realize full-length bonding of the rotary type first-anchoring and second-injecting hollow anchor rod body;
E. and connecting penetrating parts of the anchor cables of the two anchor rod-anchor cable units which are adjacently arranged through one anchor cable anchorage device, or connecting penetrating parts of the anchor cables of the two anchor rod-anchor cable units which are arranged at intervals through one anchor cable anchorage device to form an anchor rod-anchor cable support system.
Preferably, in the step D, after the front anchoring section rod body is anchored, a prestress is applied to the rotary type first-anchoring and then-injecting hollow anchor rod body, and then the rotary type first-anchoring and then-injecting hollow anchor rod body rear section is anchored by grouting.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses a can bear stock-anchor rope support system of tunnel large deformation, except that have advantages such as construction convenience, quick anchor, through the stock-anchor rope unit the interconnect between the anchor rope, avoided the problem that general stock can't bear the weight of after being destroyed in tunnel large deformation department, can also be according to the nimble quantity and the connected mode of selecting stock-anchor rope unit of large deformation scope, both can be applicable to the reinforcement of the large deformation tunnel of small scale, also can be applicable to the support of the large deformation tunnel of large scale, can effectively control the country rock deformation in tunnel, improve the security in tunnel;
2. in the anchor rod-anchor cable support system capable of bearing large deformation of the tunnel, the penetrating parts of the anchor cables of two adjacent anchor rod-anchor cable units are connected through one anchor cable and anchor device, so that the anchor rod-anchor cable support system is applicable to working conditions with large deformation ranges smaller than or equal to 1.5 m;
3. the anchor rod-anchor cable supporting system capable of bearing large deformation of the tunnel, which is provided by the utility model, the penetrating parts of the anchor cables of the two anchor rod-anchor cable units at intervals are connected through one anchor cable anchorage device, so that the anchor rod-anchor cable supporting system is applicable to working conditions with large deformation range larger than 1.5 m;
4. the utility model relates to a can bear stock-anchor rope support system of tunnel large deformation, the preceding anchor section body of rod with the back anchor section body of rod passes through the perforated connector to be connected, preceding anchor section body of rod outer wall is equipped with the bearing plate, preceding anchor section body of rod can be through the quick anchor of resin anchoring agent, will the hollow stock anchor of first back notes of rotation type, follow-up in back anchor section body of rod slip casting, make back anchor section body of rod overall length bond, accomplish fast the whole anchor installation of the hollow stock of first back notes of rotation type, the bearing plate can be used for the mortar anchor body bearing pressure of back anchor section body of rod, compare the anchor body bearing shear force of current stock, the bearing capacity of the hollow stock of first back notes of rotation type is strengthened;
5. the utility model relates to a can bear stock-anchor rope support system of tunnel large deformation, the pole is connected the one end of tip ground tackle is equipped with the resin cover, the pole passes the resin cover is fixed through interference fit, the resin cover with the region between the kicking block is used for setting up resin book formula anchoring agent, accessible the supporting machinery or the instrument of rotation type anchor back-injection cavity stock makes the body of rod of rotation type anchor back-injection cavity stock push and push rotatoryly, the rotation type anchor back-injection cavity stock is under the pressure of pivoted turn round, the kicking block overcome with the frictional force between the pole, rotate and impel along the pole, the kicking block breaks the body of the resin book formula anchoring agent bag, resin book formula anchoring agent release resin anchoring agent, the tooth utensil is followed the rotation type anchor back-injection cavity stock body of rod rotates, the toothed cutter uniformly stirs the resin anchoring agent, so that the resin anchoring agent forms an anchoring force to rapidly anchor the rotary type first-anchoring and then-injecting hollow anchor rod body;
6. the utility model discloses a can bear stock-anchor rope support system of tunnel large deformation, the resin cover is equipped with at least one installation cavity, the installation cavity is used for installing the roll-type anchoring agent of resin, the roll-type anchoring agent of resin can be carried to the anchor eye tip under the protection of resin cover, prevents that the roll-type anchoring agent bag body of resin from being broken by extrusion, stabbed and releasing the resin anchoring agent in advance in the transportation process, avoids the rotation type anchor first and then annotates the cavity stock and do not set up when in place its front end just by the resin anchoring agent anchor;
7. the utility model discloses a can bear anchor rod-anchor rope support system of tunnel large deformation, the one end opening that anchor head sleeve wore out the anchor rope is slick and sly arc structure, avoids when the anchor rope bears the pulling force produce too big stress concentration in anchor head sleeve department and lead to the anchor rope local destruction;
8. a can bear stock-anchor rope support system's of tunnel large deformation application method, stock-anchor rope unit can be anchored fast, through stock-anchor rope unit interconnect between the anchor rope for the stock can be through interconnect after tunnel large deformation department is destroyed the anchor rope suppresses the country rock and warp, improves the self-supporting ability of country rock, and the method step is simple, construction convenience, respond well.
Drawings
Fig. 1 is a schematic view of the manner in which the bolt-bolt support system of example 1 is used;
fig. 2 is a schematic view of the cable bolt of fig. 1 when loaded;
fig. 3 is a schematic view of the manner in which the bolt-cable support system of example 2 is used;
FIG. 4 is a schematic view of the cable bolt of FIG. 3 when loaded;
fig. 5 is a schematic structural view of the anchor rod-anchor cable unit according to the present invention;
FIG. 6 is a schematic view of the installation position of the resin roll type anchoring agent according to the present invention;
FIG. 7a is a sectional view of a fluted disc according to the present invention;
FIG. 7b is a right side view of FIG. 7 a;
FIG. 7c is a schematic view of the structure of the serrated knife;
fig. 8a is a structural sectional view of the top block according to the present invention;
FIG. 8b is a right side view of FIG. 8 a;
fig. 9a is a cross-sectional view of a resin cover according to the present invention;
FIG. 9b is a right side view of FIG. 9 a;
fig. 10a is a schematic structural view of a connection sleeve according to the present invention;
fig. 10b is a schematic view of the use of the connection sleeve according to the present invention;
fig. 11 is a schematic structural view of the anchor rod-anchor cable unit according to the present invention when anchoring is just completed;
fig. 12 is a schematic structural diagram of the anchor rod-anchor cable unit of the present invention after bearing load.
The labels in the figure are: a-anchor rod-anchor cable unit, B-anchor cable anchorage, 10-rotary type anchor first and then injection hollow anchor rod, 11-front anchoring section rod body, 12-rear anchoring section rod body, 13-perforated connector, 14-bearing plate, 15-top block, 16-tooth tool, 16 a-tooth disc, 16B-tooth cutter, 17-round rod, 18-resin cover, 19-anchor head sleeve, 20-anchor cable, 30-end anchorage device, 40-resin roll type anchoring agent, 50-connecting sleeve and 60-drill rod connecting sleeve.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1, 2, 5-12, the anchor rod-anchor cable support system for large deformation of tunnel according to the present invention comprises a plurality of anchor rod-anchor cable units a and a plurality of anchor cable anchors B, wherein each of the anchor rod-anchor cable units a comprises a rotary type first anchoring and then injecting hollow anchor rod 10, anchor cable 20 and end anchor 30.
As shown in fig. 5, 11 and 12, the rotary type hollow anchor rod 10 with first anchoring and second injecting comprises a hollow front anchoring section rod body 11 and a hollow rear anchoring section rod body 12, the front anchoring section rod body 11 and the rear anchoring section rod body 12 are connected through a perforated connector 13, a bearing plate 14 is arranged on the outer wall of the front anchoring section rod body 11, the bearing plate 14 can be used for bearing pressure of a mortar anchoring body of the rear anchoring section rod body 12, and compared with the bearing shearing force of an anchoring body of an existing anchor rod, the bearing capacity of the rotary type hollow anchor rod 10 with first anchoring and second injecting is enhanced.
As shown in fig. 5, 6, 7b, 11 and 12, the outer wall of the rotary type first-anchoring and second-injecting hollow anchor rod 10 is provided with external threads, one end of the front anchoring section rod body 11 is connected with a fluted disc 16a in a threaded manner, one end of the rear anchoring section rod body 12 is connected with the anchor head sleeve 19 in a threaded manner, and meanwhile, the outer wall of the rotary type first-anchoring and second-injecting hollow anchor rod 10 is rough, so that the anchoring force is enhanced.
As shown in fig. 5, 6, 7a, 7b, 11 and 12, a plurality of teeth 16b are provided around the toothed disc 16a, and the toothed disc 16a is press-fitted with the top block 15.
As shown in fig. 5, 6, 8a, 8b, 11 and 12, a through hole is formed in the top block 1/5, the through hole is in interference fit with a hollow round rod 17, one end of the round rod 17 is connected with the end anchor 30, the other end of the round rod 17 is inserted into the front anchoring section rod body 11, the top block 15 is a cone, and the cone top of the cone faces the end anchor 30.
As shown in fig. 5, 6, 9a, 9b and 10, a resin cover 18 is disposed at one end of the round bar 16 connected to the end anchor 30, the round bar 17 passes through the resin cover 18 and is fixed by interference fit, and the region between the resin cover 18 and the top block 15 is used for disposing a resin roll type anchoring agent 40, with this structural arrangement, the rotary type first-anchoring and then-injecting hollow anchor 10 can be pressed and pushed to rotate by a machine or tool matched with the rotary type first-anchoring and then-injecting hollow anchor 10, the rotary type first-anchoring and then-injecting hollow anchor 10 rotates and pushes along the round bar 17 by the top block 15 overcoming the friction force between the rotary type first-anchoring and then-injecting hollow anchor 10 under the action of the rotary pressing and twisting, the top block 15 crushes the resin roll type anchoring agent 40 bag body, the resin roll type anchoring agent 40 releases the resin anchoring agent, the fluted disc 16a rotates along with the rotary type first-anchoring and then-injecting hollow anchor 10, and the toothed cutter 16b uniformly stirs the resin anchoring agent, so that the resin anchoring agent forms an anchoring force to rapidly anchor the rotary type first-anchoring and then-injecting hollow anchor rod 10.
As shown in fig. 6, 9a and 9b, the resin cover 18 is provided with four mounting cavities for mounting the resin roll-type anchoring agent 40, all the mounting cavities are uniformly distributed along the cross section of the resin cover 18, the resin cover 18 is a frustum body, the vertex of the frustum body is arranged opposite to the round rod 17, and with this structural arrangement, the resin roll-type anchoring agent 40 can be conveyed to the inner end part of the anchoring hole under the protection of the resin cover 18, so as to prevent the resin roll-type anchoring agent 40 bag body from being crushed and punctured during the conveying process to release the resin anchoring agent in advance, and prevent the front end of the rotary type first-anchoring and second-injecting hollow anchor rod 10 from being anchored by the resin anchoring agent when the rotary type first-anchoring and second-injecting hollow anchor rod 10 is not yet arranged in place.
As shown in fig. 1, 2, 5, 11 and 12, the anchor cable 20 is penetratingly disposed in the rotary type first-anchoring and then-injecting hollow anchor rod 10, one end of the anchor cable 20 is anchored at the end of the rotary type first-anchoring and then-injecting hollow anchor rod 10 through the end anchor 30, the other end of the anchor cable 20 penetrates out of the rotary type first-anchoring and then-injecting hollow anchor rod 10 and sequentially penetrates through the round rod 17, the front anchoring section rod body 11, the perforated connector 13, the rear anchoring section rod body 12 and the anchor head sleeve 19, an opening of the anchor head sleeve 19 penetrating out of one end of the anchor cable 20 is a smooth arc structure, so that local damage of the anchor cable 20 due to excessive stress concentration generated at the anchor head sleeve 19 when the anchor cable 20 bears a tensile force is avoided; specifically, the anchor cable 20 is an unbonded anchor cable, an anticorrosive lubricating coating is disposed on the surface of the anchor cable 20, a sheath is sleeved outside the anchor cable 20, and the anchor cable 20 and the sheath can slide relatively.
As shown in fig. 1-2, the penetrating parts of the anchor cables 20 of every two adjacent anchor rod-anchor cable units a are connected through one anchor cable B and can be tensioned, and the anchor rod-anchor cable unit is applicable to the working condition with a large deformation range of 1-1.5 m.
The anchor rod-anchor cable support system is arranged at the position where the tunnel is greatly deformed, because the deformation of the surrounding rock is gradually increased from the deep part of the surrounding rock to the inside of the tunnel, and the strength of the resin anchoring body is greater than that of the mortar anchoring body and the rod body of the anchor rod, after the mortar anchoring body is damaged, the anchor rod moves to the deep part of the surrounding rock relative to the surrounding rock under the anchoring action of the resin anchoring agent, so that the anchor cables 20 connected with each other are gradually tightened until bearing the tensile force; at the moment, if the surrounding rock continues to deform, the tension of the anchor cable 20 is further increased, the deformation pressure of the surrounding rock is borne through the tension of the anchor cable 20, an anchor rod-anchor cable support system which mainly bears the surrounding rock pressure through the anchor cable 20 and inhibits the deformation of the surrounding rock is formed at the position of the tunnel where large deformation occurs, and the self-bearing capacity of the surrounding rock is improved.
As shown in fig. 11 and 12, the anchor head sleeve 19 is located outside the surrounding rock just after the anchor rod-anchor cable unit a is completely bonded and anchored, and after a large deformation occurs, the anchor head sleeve 19 is located inside the surrounding rock and the tension of the anchor cable 20 is gradually increased as the anchor rod-anchor cable unit a moves towards the inside of the surrounding rock.
After the front section of the rotary type anchor rod 10 is quickly anchored by the resin anchoring agent, prestress can be applied to the rotary type anchor rod 10, and then grouting and anchoring are performed after prestress is applied to the rear section of the rotary type anchor rod 10.
Compare general stock, adopt a stock-anchor rope support system that can bear tunnel large deformation, except having advantages such as construction convenience, quick anchor, through stock-anchor rope unit A interconnect between the anchor rope 20 has avoided the unable problem that bears after tunnel large deformation department is destroyed of general stock, can also be according to the nimble quantity and the connected mode of selecting stock-anchor rope unit A of large deformation scope, both can be applicable to the reinforcement in the large deformation tunnel of minizone, also can be applicable to the strutting in large deformation tunnel on a large scale, can effectively control the surrounding rock deformation in tunnel, improve the security in tunnel.
Example 2
As shown in fig. 3-11, a stock-anchor rope support system that can bear the tunnel and warp greatly, the difference with embodiment 1 lies in, in this embodiment, as shown in fig. 3 and 4, every interval set up two stock-anchor rope unit a the portion of wearing out of anchor rope 20 is through one anchor rope anchorage device B connects and can the tensioning, applicable in the operating mode that large deformation range is greater than 1.5 m.
Example 3
As shown in fig. 1 to 11, the application method of the anchor rod-anchor cable support system capable of withstanding large deformation of a tunnel according to the present invention is the support system according to embodiment 1 or embodiment 2, and the application method includes the following steps:
A. forming an anchor hole, namely inserting the rotary type first-anchoring and then-injecting hollow anchor rod 10 in the anchor rod-anchor cable unit A and an anchor cable 20 which is anchored through an end anchorage device 30 and penetrates through the rotary type first-anchoring and then-injecting hollow anchor rod 10 into the anchor hole together to the bottom of the anchor hole;
B. connecting a connecting sleeve 40 with the post-anchoring section rod body 12 through internal threads, then guiding the anchor cable 20 from a circular opening on the side surface of the connecting sleeve 40 to the outside of the rotary type first-anchoring and second-injecting hollow anchor rod 10, connecting the other end of the connecting sleeve 40 with a drill rod connecting sleeve 50 through external threads, connecting the other end of the drill rod connecting sleeve 50 with a drill rod, driving the rotary type first-anchoring and second-injecting hollow anchor rod 10 to rotate and push towards the inside of an anchor hole under the rotary pushing and propelling action of the drill rod, and under the rotary pressing and twisting action of the rotary type first-anchoring and second-injecting hollow anchor rod 10, overcoming the friction force between the top block 15 and the round rod 17, and rotating and propelling along the round rod 17;
C. the jacking block 15 breaks a resin roll type anchoring agent 40 bag body, the resin roll type anchoring agent 40 releases a resin anchoring agent, resin anchoring agent slurry is mixed, the tooth tool 16 rotates along with the rotary type hollow anchor rod 10 which is anchored firstly and then injected later, the tooth tool 16b on the tooth tool 16 uniformly stirs the resin anchoring agent, and the rotary type front anchoring section rod body 11 of the hollow anchor rod 10 which is anchored firstly and then injected later is quickly anchored;
D. after the front anchoring section rod body 11 of the rotary type first-anchoring and then-injecting hollow anchor rod 10 is anchored, applying prestress on the rod body of the rotary type first-anchoring and then-injecting hollow anchor rod 10, and then injecting slurry to anchor the rear anchoring section rod body 12 of the rotary type first-anchoring and then-injecting hollow anchor rod 10, so that the full-length bonding of the rod body of the rotary type first-anchoring and then-injecting hollow anchor rod 10 is realized;
E. as shown in fig. 1 and 2, the penetrating parts of the anchor lines 20 of two adjacent anchor-anchor line units a are connected through one anchor line B, or as shown in fig. 3 and 4, the penetrating parts of the anchor lines 20 of two spaced anchor-anchor line units a are connected through one anchor line B, so as to form an anchor-anchor line support system.
Application an application of stock-anchor rope support system that can bear tunnel large deformation, stock-anchor rope unit A can be anchored fast, through stock-anchor rope unit A interconnect between the anchor rope 20 for the stock can be through interconnect behind tunnel large deformation department the anchor rope 20 restraines the country rock and warp, improves the self-supporting ability of country rock, and the method step is simple, and convenient construction, respond well.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. An anchor-anchor support system capable of bearing large deformation of a tunnel, comprising a plurality of anchor-anchor units (a) and a plurality of anchor anchors (B), each of the anchor-anchor units (a) comprising:
the rotary type first-anchoring and second-injecting hollow anchor rod (10) is arranged in an anchor hole, a front anchoring section rod body (11) of the rotary type first-anchoring and second-injecting hollow anchor rod (10) positioned on the inner side of the anchor hole can be anchored through a resin anchoring agent, and a rear anchoring section rod body (12) can be anchored through grouting;
the end anchorage device (30) is arranged at one end of the rotary type first-anchoring and second-injecting hollow anchor rod (10) positioned at the inner side of the anchor hole;
the anchor cable (20) penetrates through the rotary type first-anchoring and then-injecting hollow anchor rod (10), one end of the anchor cable (20) is anchored at the end part of the rotary type first-anchoring and then-injecting hollow anchor rod (10) through the end part anchorage device (30), and the other end of the anchor cable (20) penetrates out of one end of the anchor head of the rotary type first-anchoring and then-injecting hollow anchor rod (10);
wherein the anchor lines (20) of each two anchor-anchor line units (A) are connected by a single anchor line anchor (B) and can be tensioned.
2. The support system of claim 1, wherein the anchor lines (20) of adjacent two of said bolt-anchor line units (a) are connected at their exit portions by one of said anchor line anchors (B).
3. The support system of claim 1, wherein the anchor lines (20) of two spaced anchor-line units (a) are connected by one anchor line (B).
4. The support system according to any one of claims 1-3, wherein each of said bolt-and-cable units (A) further comprises an anchor head sleeve (19), said anchor head sleeve (19) being connected to an end of an anchor head of said rotary type anchor-and-then-fill hollow bolt (10), said cable (20) extending through said anchor head sleeve (19).
5. The support system according to claim 4, wherein the front anchoring section rod body (11) and the rear anchoring section rod body (12) are connected through a perforated connector (13), and the outer wall of the front anchoring section rod body (11) is provided with a bearing plate (14).
6. The support system according to claim 5, wherein a gear (16) is connected to one end of the front anchoring section rod body (11), the gear (16) comprises a fluted disc (16a) and a toothed cutter (16b), the gear (16) is fixed with a top block (15) through pressing, a through hole is formed in the top block (15), a hollow round rod (17) is in interference fit with the through hole, one end of the round rod (17) is connected with the end anchor (30), and the other end of the round rod is inserted into the front anchoring section rod body (11).
7. The support system according to claim 6, wherein the end of the round bar (17) connected with the end anchorage device (30) is provided with a resin cover (18), the round bar (17) is fixed by interference fit through the resin cover (18), and the area between the resin cover (18) and the top block (15) is used for arranging a resin roll type anchoring agent (40).
8. The support system of claim 4, wherein the end of the anchor head sleeve (19) that extends out of the anchor cable (20) is open in a rounded arc configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921386371.2U CN210370737U (en) | 2019-08-23 | 2019-08-23 | Anchor rod-anchor cable support system capable of bearing large deformation of tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921386371.2U CN210370737U (en) | 2019-08-23 | 2019-08-23 | Anchor rod-anchor cable support system capable of bearing large deformation of tunnel |
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| Publication Number | Publication Date |
|---|---|
| CN210370737U true CN210370737U (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921386371.2U Withdrawn - After Issue CN210370737U (en) | 2019-08-23 | 2019-08-23 | Anchor rod-anchor cable support system capable of bearing large deformation of tunnel |
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| Country | Link |
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| CN (1) | CN210370737U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344868A (en) * | 2019-08-23 | 2019-10-18 | 中铁二院工程集团有限责任公司 | A kind of anchor pole bearing serious deformation-cable bolting system and application method |
-
2019
- 2019-08-23 CN CN201921386371.2U patent/CN210370737U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344868A (en) * | 2019-08-23 | 2019-10-18 | 中铁二院工程集团有限责任公司 | A kind of anchor pole bearing serious deformation-cable bolting system and application method |
| CN110344868B (en) * | 2019-08-23 | 2024-03-19 | 中铁二院工程集团有限责任公司 | Anchor rod-anchor cable supporting system capable of bearing large deformation of tunnel and use method |
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