CN210370739U - Anchor rod-anchor cable support system suitable for large-deformation tunnel - Google Patents
Anchor rod-anchor cable support system suitable for large-deformation tunnel Download PDFInfo
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- CN210370739U CN210370739U CN201921389103.6U CN201921389103U CN210370739U CN 210370739 U CN210370739 U CN 210370739U CN 201921389103 U CN201921389103 U CN 201921389103U CN 210370739 U CN210370739 U CN 210370739U
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- 238000004873 anchoring Methods 0.000 claims abstract description 198
- 239000011347 resin Substances 0.000 claims abstract description 84
- 229920005989 resin Polymers 0.000 claims abstract description 84
- 239000003795 chemical substances by application Substances 0.000 description 53
- 239000011435 rock Substances 0.000 description 31
- 238000000034 method Methods 0.000 description 17
- 230000009471 action Effects 0.000 description 8
- 238000010276 construction Methods 0.000 description 8
- 239000004570 mortar (masonry) Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 230000000149 penetrating effect Effects 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process 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
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 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 suitable for large deformation tunnel, which comprises a plurality of anchor rod-anchor cable units, wherein each anchor rod-anchor cable unit comprises a rotary type first anchoring and then hollow anchor rod, a front anchoring section rod body positioned at the inner side of an anchor hole can be anchored by a resin anchoring agent, a rear anchoring section rod body can be anchored by grouting, the anchor head end of the rotary type first anchoring and then hollow anchor rod is connected with a backing plate, and a backing plate anchorage device is arranged on the backing plate; 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 rope runs through and locates in the first anchor of rotation type is annotated the cavity stock afterwards, and the one end of anchor rope is passed through the tip ground tackle anchor and is annotated the tip of cavity stock after the first anchor of rotation type, and the other end of anchor rope is annotated cavity stock anchor head end from the first anchor of rotation type and is worn out, wears out the part and connects and can the tensioning on the backing plate ground tackle of annotating the cavity stock after the first anchor of adjacent rotation type.
Description
Technical Field
The utility model relates to a tunnel support field, in particular to stock-anchor rope support system and application method suitable for large deformation 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 an stock-anchor rope support system and application method suitable for the tunnel warp greatly.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
a bolt-anchor cable support system suitable for large deformation tunnel, comprising a plurality of bolt-anchor cable units, each of said bolt-anchor cable units comprising:
the rotary type first-anchoring and then-injecting hollow anchor rod is characterized in that a front anchoring section rod body of the rotary type first-anchoring and then-injecting hollow anchor rod positioned on the inner side of an anchor hole can be anchored through a resin anchoring agent, a rear anchoring section rod body can be anchored through grouting, a base plate is connected to the anchor head end of the rotary type first-anchoring and then-injecting hollow anchor rod, and a base plate anchor is arranged on the base plate;
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 rope runs through and is arranged in the rotary type hollow anchor rod which is firstly anchored and then injected, one end of the anchor rope is anchored at the end part of the rotary type hollow anchor rod which is firstly anchored and then injected through the end part anchor device, the other end of the anchor rope penetrates out of the rotary type hollow anchor rod which is firstly anchored and then injected through the end part anchor device, and the penetrating part of the anchor rope is connected with and can be tensioned on the backing plate anchor device adjacent to the rotary type hollow anchor rod which is firstly anchored and then injected through the rotary type.
The anchor rod-anchor cable support system is arranged on the section of a tunnel with large deformation and is arranged along the arch part or the whole ring of the tunnel. 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 the strength 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 cable connected with the base plate anchorage device is gradually tightened until bearing the 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.
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 an stock-anchor rope support system suitable for large deformation tunnel, 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 general stock is destroyed in the tunnel large deformation department, can replace traditional system stock, support as the system in large deformation tunnel, can effectively control the full sectional country rock in tunnel and warp, improve the security in tunnel.
Preferably, the thread of the backing plate is matched with the thread of the rotary type first anchoring and then injecting hollow anchor rod body.
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 first anchoring and then hollow anchor rod anchoring is performed, the rear anchoring section rod body is subsequently grouted and anchored, the rear anchoring section rod body is bonded in the whole length, the whole anchoring installation of the rotary type first anchoring and then hollow anchor rod is rapidly completed, the bearing plate can be used for bearing the pressure of the 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 first anchoring and then hollow anchor rod 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 tooth is connected to the end 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 in an interference fit manner, 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 fluted disc rotates along with the rotary type first-anchoring and second-injecting hollow anchor rod body, and the serrated knife 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, and the mounting cavity is used for connecting 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, 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, an opening of the pad plate, which penetrates 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 base plate 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 use method of stock-anchor rope support system suitable for large deformation tunnel, 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;
the method comprises the step of connecting the penetrating part of the anchor cable to the backing plate anchorage device of the adjacent rotary type anchoring-first injection-later hollow anchor rod.
Adopt an application method of stock-anchor rope support system suitable for large deformation tunnel, the rotation type is anchored earlier and is annotated the cavity stock afterwards and can be anchored fast, through the rotation type is anchored earlier and is annotated the cavity stock afterwards anchor rope and another the interconnect of backing plate ground tackle makes the stock can pass through after tunnel large deformation department is destroyed the anchor rope restraines the country rock and warp, improves the self-supporting ability of country rock, the method simple step, convenient construction, 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 inclined 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 into an anchor hole under the action of rotary propelling 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 rotating pressure and torque of the rotary type first-anchoring and;
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 the penetrating part of each anchor cable from the rotary type first-anchoring and then-injecting hollow anchor rod to the backing plate anchorage device of the adjacent rotary type first-anchoring and then-injecting hollow anchor rod to form an anchor rod-anchor cable supporting 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 anchor rod-anchor cable support system applicable to the large deformation tunnel, which is provided by the utility model, has the advantages of convenient construction, quick anchoring and the like, avoids the problem that the general anchor rod can not bear the weight of the tunnel after the large deformation part of the tunnel is damaged by the mutual connection of the anchor rods of the anchor rod-anchor cable units, can replace the anchor rod of the traditional system, is used as the system support of the large deformation tunnel, can effectively control the surrounding rock deformation of the full section of the tunnel, and improves the safety of the tunnel;
2. the utility model relates to an anchor rod-anchor rope support system suitable for large deformation tunnel, 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 come quick anchor through resin anchoring agent, will the hollow stock anchor of first back notes of rotation type, follow-up again slip casting in the back anchor section body of rod makes the whole length of back anchor section body of rod bond, accomplishes the whole anchor installation of the hollow stock of first back notes of rotation type fast, the bearing plate can be used for the mortar anchor body bearing pressure of the 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;
3. the utility model relates to an anchor rod-anchor rope support system suitable for large deformation tunnel, the round bar is connected the one end of tip ground tackle is equipped with the resin cover, the round bar passes resin cover and 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 instrument of rotary type anchor first back notes cavity anchor rod makes the rotary type anchor first back notes cavity anchor rod body pressure push rotation, the rotary type anchor first back notes cavity anchor rod under the pressure of pivoted turn round effect, the kicking block overcome with the frictional force between the round bar, along the round bar rotation and impel, the kicking block breaks the resin book formula anchoring agent bag body, resin book formula anchoring agent release resin anchoring agent, the fluted disc follows the rotary type anchor first back notes cavity anchor rod body rotates, the serrated knife stirs even resin anchoring agent, forming an anchoring force by using a resin anchoring agent to quickly anchor the rotary type hollow anchor rod body after anchoring;
4. the utility model discloses an anchor rod-anchor rope support system suitable for large deformation tunnel, the resin cover is equipped with at least one installation cavity, the installation cavity is used for connecting 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 anchor rod and do not set up when in place its front end just by the resin anchoring agent anchor;
5. the utility model discloses an anchor rod-anchor rope support system suitable for large deformation tunnel, the one end opening that the backing plate 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 backing plate department and lead to the anchor rope local destruction;
6. a use method suitable for stock-anchor rope support system in large deformation tunnel, the rotation type is anchored earlier and is annotated the cavity stock afterwards and can be anchored fast, through the rotation type is anchored earlier and is annotated the cavity stock afterwards anchor rope and another the interconnect of backing plate ground tackle makes the stock pass through after tunnel large deformation department is destroyed the anchor rope restraines the country rock and warp, improves the self-supporting ability of country rock, the method step is simple, convenient construction, respond well.
Drawings
Fig. 1 is a schematic view of a use mode of the anchor rod-anchor cable support system of the present invention;
fig. 2 is a schematic view of the cable bolt of fig. 1 when loaded;
fig. 3 is a schematic structural diagram of the anchor rod-anchor cable unit according to the present invention;
FIG. 4 is a schematic view of the installation position of the resin roll type anchoring agent according to the present invention;
fig. 5a is a schematic structural view of a fluted disc according to the present invention;
FIG. 5b is a left side view of FIG. 5 a;
FIG. 5c is a schematic view of the structure of the serrated knife;
fig. 6a is a schematic structural diagram of the top block according to the present invention;
FIG. 6b is a left side view of FIG. 6 a;
fig. 7a is a schematic structural view of a resin cover according to the present invention;
FIG. 7b is a right side view of FIG. 7 a;
fig. 8a is a schematic structural view of the backing plate according to the present invention;
FIG. 8b is a cross-sectional view taken along line A-A of FIG. 8 a;
fig. 9a is a schematic structural view of a connection sleeve according to the present invention;
fig. 9b is a schematic view of the use of the connection sleeve according to the present invention;
fig. 10 is a schematic structural view of the anchor rod-anchor cable unit according to the present invention just after the completion of anchoring;
fig. 11 is a schematic structural diagram of the anchor rod-anchor cable unit of the present invention when bearing load.
The labels in the figure are: 10-rotary type first-anchoring and second-injecting 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, 16 b-tooth tool, 17-round rod, 18-resin cover, 19-backing plate, 19 a-backing plate anchor, 20-anchor cable, 30-end anchor, 40-resin 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. 1-11, the anchor rod-anchor cable support system for large deformation tunnel according to the present invention comprises anchor rod-anchor cable units, each of which comprises a rotary type first anchoring and then injecting hollow anchor rod 10, anchor cable 20 and end anchor device 30.
As shown in fig. 3, 10, and 11, the rotary type hollow anchor rod 10 with first anchoring and second injecting includes 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 by a perforated connector 13, a bearing plate 14 is disposed on an outer wall of the front anchoring section rod 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 a 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. 3, 4, 5a to 5c and fig. 10 and 11, the outer wall of the rotary type first-anchoring and second-injecting hollow anchor rod 10 is provided with an external thread, one end of the front anchoring section rod body 11 is connected with a toothed disc 16 in a threaded manner, the toothed disc 16 comprises a toothed disc 16a and a toothed cutter 16b, one end of the rear anchoring section rod body 12 is connected with the backing plate 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. 3, 4, 5a, 5b, 5c and fig. 10 and 11, a plurality of toothed blades 16b are provided on the periphery of the toothed disc 16a, and the toothed disc 16a is press-fitted with the top block 15.
As shown in fig. 3, 4, 6a, 6b and fig. 10 and 11, a through hole is formed in the top block 15, 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 in a cone shape, and the cone top of the cone faces the end anchor 30.
As shown in fig. 3, 4, 7a, 7b and fig. 10 and 11, a resin cover 18 is disposed at one end of the round rod 17 connected to the end anchor 30, the round rod 17 passes through the resin cover 18 and is fixed in an interference fit manner, a region between the resin cover 18 and the top block 15 is used for disposing a resin roll-type anchoring agent 40, with such a structural arrangement, the rotary type first-anchoring second-injecting hollow anchor 10 can be pressed and pushed to rotate by a machine or a tool matched with the rotary type first-anchoring second-injecting hollow anchor 10, the rotary type first-anchoring second-injecting hollow anchor 10 rotates and pushes along the round rod 17 by the top block 15 overcoming friction force between the top block and the round rod 17 under the action of rotating pressure and torsion, 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 second-injecting hollow anchor 10 rod, 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. 4, 7a and 7b, the resin cover 17 is provided with four mounting cavities for connecting the resin roll-type anchoring agent 40, all the mounting cavities are uniformly distributed along the cross section of the resin cover 17, the resin cover 17 is a frustum, the vertex of the frustum is arranged opposite to the round rod 16, and with this structural arrangement, the resin roll-type anchoring agent 40 can be conveyed to the inner end part of the anchor hole under the protection of the resin cover 17, 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-second-injecting hollow anchor rod 10 from being anchored by the resin anchoring agent when the rotary type first-anchoring-second-injecting hollow anchor rod 10 is not yet arranged in place.
As shown in fig. 1-3 and 9, the anchor cable 20 is disposed 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 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 from the head end of the rotary type first anchoring and then injecting hollow anchor rod 10 and sequentially penetrates through the round rod 16, the front anchoring section rod body 11, the perforated connector 13, the rear anchoring section rod body 12 and the backing plate 18, an opening of the backing plate 18 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 backing plate 18 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. 1-3, 8a, 8b, 10 and 11, the backing plate 19 is provided with the backing plate anchorage 19, and the penetrating part of the anchor cable 20 in each rotary type anchor-first-injection hollow anchor rod 10 is connected with and can be tensioned on the backing plate anchorage 19a of the adjacent rotary type anchor-first-injection hollow anchor rod 10. The opening of the backing plate 19, which penetrates through the anchor cable 20, is a smooth arc structure, so that stress concentration at the opening is prevented from damaging the anchor cable 20 when the anchor cable 20 is pulled.
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 towards 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 cable 20 connected with the backing plate anchorage device 19a is 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.
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 an stock-anchor rope support system suitable for large deformation tunnel, except having advantages such as construction convenience, quick anchor, through stock-anchor rope unit interconnect between the anchor rope 20 has avoided the unable problem that bears after general stock is destroyed in the big department of deformation in tunnel, can replace traditional system stock, support as the system in large deformation tunnel, can effectively control the full sectional country rock in tunnel and warp, improve the security in tunnel.
Example 2
As shown in fig. 1 to 11, the application method of the anchor rod-anchor cable support system for large deformation tunnel according to the present invention, using the support system according to embodiment 1, 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 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. as shown in fig. 9a and 9b, a connecting sleeve 50 is connected with the post-anchoring section rod body 12 through an internal thread, then the anchor cable 20 is guided to the outside of the rotary type first-anchoring and then-injecting hollow anchor rod 10 through a circular oblique opening on the side surface of the connecting sleeve 50, the other end of the connecting sleeve 50 is connected with a drill rod connecting sleeve 60 through an external thread, the drill rod connecting sleeve 60 is connected with a drill rod, the rotary type first-anchoring and then-injecting hollow anchor rod 10 is driven to rotate and push towards the inside of an anchor hole under the rotation and propelling action of the drill rod, and under the rotating pressure and torsion action of the rotary type first-anchoring and then-injecting hollow anchor rod 10, the top block 15 overcomes the friction force between the top block and the round rod 17 and rotates and pushes along the round;
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. and connecting the penetrating part of each anchor cable 20 from the rotary type anchor-first-injection hollow anchor rod 10 to the backing plate anchorage device 19a of the adjacent rotary type anchor-first-injection hollow anchor rod 10 to form an anchor rod-anchor cable support system.
Application an application method suitable for stock-anchor rope support system in large deformation tunnel, the rotation type is anchored earlier and is annotated cavity stock 10 afterwards and can be anchored fast, through the rotation type is anchored earlier and is annotated cavity stock 10 afterwards anchor rope 20 with another backing plate ground tackle 19 a's interconnect for the stock can pass through after tunnel large deformation department is destroyed anchor rope 20 restraines the country rock and warp, improves the self-supporting ability of country rock, the method simple step, 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 (7)
1. The anchor rod-anchor cable support system suitable for the large deformation tunnel is characterized by comprising a plurality of anchor rod-anchor cable units, wherein each anchor rod-anchor cable unit comprises:
the rotary type first-anchoring and then-injecting hollow anchor rod (10), a front anchoring section rod body (11) of the rotary type first-anchoring and then-injecting hollow anchor rod (10) positioned on the inner side of an anchor hole can be anchored through a resin anchoring agent, a rear anchoring section rod body (12) can be anchored through grouting, a base plate (19) is connected to the anchor head end of the rotary type first-anchoring and then-injecting hollow anchor rod (10), and a base plate anchorage device (19a) is arranged on the base plate (19);
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 rope (20) penetrates through the rotary type first-anchoring and then-injecting hollow anchor rod (10), one end of the anchor rope (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), the other end of the anchor rope (20) penetrates out of the head end of the rotary type first-anchoring and then-injecting hollow anchor rod (10), penetrates out of the head end of the rotary type first-anchoring and then-injecting hollow anchor rod, and can be tensioned to the adjacent backing plate anchorage device (19a) of the rotary type first-anchoring and then-injecting hollow anchor rod (10).
2. The support system according to claim 1, 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).
3. The support system according to claim 2, wherein a tooth tool (16) is connected to one end of the front anchoring section rod body (11), the tooth tool (16) comprises a fluted disc (16a) and a tooth cutter (16b), the tooth tool (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).
4. The support system according to claim 3, wherein one end of the round rod (17) connected with the end anchorage device (30) is provided with a resin cover (18), the round rod (17) penetrates through the resin cover (18) and is fixed in an interference fit mode, and the area between the resin cover (18) and the top block (15) is used for arranging a resin roll type anchoring agent (40).
5. Support system according to claim 4, characterized in that the resin cover (18) is provided with at least one mounting cavity for connection of a resin-wound anchoring agent (40).
6. The support system of claim 1, wherein the anchor cables (20) are unbonded anchor cables, and wherein sheaths are provided around the anchor cables (20), the anchor cables (20) being slidable relative to the sheaths.
7. The support system according to any one of claims 1 to 6, wherein the end of the tie plate (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 |
|---|---|---|---|
| CN201921389103.6U CN210370739U (en) | 2019-08-23 | 2019-08-23 | Anchor rod-anchor cable support system suitable for large-deformation tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921389103.6U CN210370739U (en) | 2019-08-23 | 2019-08-23 | Anchor rod-anchor cable support system suitable for large-deformation tunnel |
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| Publication Number | Publication Date |
|---|---|
| CN210370739U true CN210370739U (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921389103.6U Withdrawn - After Issue CN210370739U (en) | 2019-08-23 | 2019-08-23 | Anchor rod-anchor cable support system suitable for large-deformation tunnel |
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| Country | Link |
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| CN (1) | CN210370739U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344866A (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 suitable for large deformation tunnel-cable bolting system and application method |
| CN112281863A (en) * | 2020-10-14 | 2021-01-29 | 河南城建学院 | Safety protection device for excavation of building deep foundation pit |
-
2019
- 2019-08-23 CN CN201921389103.6U patent/CN210370739U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344866A (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 suitable for large deformation tunnel-cable bolting system and application method |
| CN110344866B (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 suitable for large-deformation tunnel and use method |
| CN112281863A (en) * | 2020-10-14 | 2021-01-29 | 河南城建学院 | Safety protection device for excavation of building deep foundation pit |
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