CN115614078A - Anchor rod device suitable for fault anchoring and supporting method - Google Patents
Anchor rod device suitable for fault anchoring and supporting method Download PDFInfo
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- CN115614078A CN115614078A CN202211045246.1A CN202211045246A CN115614078A CN 115614078 A CN115614078 A CN 115614078A CN 202211045246 A CN202211045246 A CN 202211045246A CN 115614078 A CN115614078 A CN 115614078A
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- 238000004873 anchoring Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 152
- 239000010959 steel Substances 0.000 claims abstract description 152
- 239000011435 rock Substances 0.000 claims abstract description 19
- 238000005553 drilling Methods 0.000 claims abstract description 13
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 9
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 9
- 241001330002 Bambuseae Species 0.000 claims abstract description 9
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 9
- 239000011425 bamboo Substances 0.000 claims abstract description 9
- 230000003068 static effect Effects 0.000 claims abstract description 6
- 230000000670 limiting effect Effects 0.000 claims description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000003139 buffering effect Effects 0.000 abstract description 6
- 238000001125 extrusion Methods 0.000 abstract description 4
- 230000036961 partial effect Effects 0.000 abstract description 4
- 239000004020 conductor Substances 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 239000002689 soil Substances 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0046—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts formed by a plurality of elements arranged longitudinally
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/006—Anchoring-bolts made of cables or wires
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides an anchor rod device suitable for fault anchoring and a supporting method, and relates to the technical field of rock and soil anchoring. This stock device suitable for fault anchor, make the outer sleeve correspond the position of breaking layer in the stock drilling, when the fault dislocation takes place, down the stock takes place the dislocation for last stock and removes, the outer sleeve takes place the bending in stranded conductor cavity position, and simultaneously, first steel strand wires connection pad is kept away from to second steel strand wires connection pad, partial or whole steel strand wires become the tensioning state by the relaxation state, atress is in order to strengthen the joint strength of stock and lower stock behind the steel strand wires tensioning, second steel strand wires connection pad is along the axial displacement who lets the pressure section of thick bamboo, let the pressure piece by extrusion deformation realize letting press the buffering, along with steel strand wires last tensioning, let the pressure piece continuously by extrusion deformation, finally make the steel strand wires, let the pressure piece reach static equilibrium state. Therefore, the anchor rod device can bear partial shear stress and instantaneous larger axial stress generated by fault dislocation at the fault position.
Description
Technical Field
The invention relates to the technical field of rock and soil anchoring, in particular to an anchor rod device and a supporting method suitable for fault anchoring.
Background
With the continuous development of economy and technology in China, china starts to work in recent years, and some major foundation engineering construction projects which are not constructed before for various reasons. In the process of continuously advancing major foundation engineering construction, projects with large burial depth, more faults and complex geological conditions are continuously encountered. The fault is one of the more common problems encountered by people, and the support at the fault is more important. The reinforcement of the inside of the surrounding rock is often used in engineering by anchor bolt support, and the support quality of the anchor bolt is directly related to the safety of the engineering. The anchor bolt support mainly bears axial stress, but after the support, if fault dislocation develops along the radial direction of the anchor bolt, the anchor bolt can be sheared off due to low shearing strength of the anchor bolt, the support can be damaged, and the safety of the whole structure can be damaged under serious conditions. In addition, when the fault moves, instantaneous large axial stress is generated on the anchor rod, and the anchor rod is also in a risk of being broken. In the current stage, after fault dislocation is generated, the rock and soil mass is timely grouted and anchored and the secondary lining is embedded with a device to offset shear deformation so as to offset the influence caused by fault dislocation. Through slip casting anchor with bury the device underground at secondary lining department and offset shear deformation and carry out construction operations, increased engineering construction workload, it is hard to waste time to the recovery effect is also not ideal enough.
Disclosure of Invention
The invention aims to provide an anchor rod device suitable for fault anchoring and a supporting method suitable for fault anchoring, so that the anchor rod device bears partial shear stress and instantaneous larger axial stress generated by fault dislocation at a fault position.
In order to achieve the above purpose, the technical solution adopted by the invention is as follows:
an anchor rod device suitable for fault anchoring comprises an outer sleeve, a first steel strand connecting disc, a second steel strand connecting disc, a pressure relief cylinder, an upper anchor rod, a lower anchor rod and a steel strand;
the inner part of the outer sleeve is sequentially provided with an anchor rod cavity, a first connecting disc assembly cavity, a stranded wire cavity, a second connecting disc assembly cavity and a yielding cavity which are sequentially communicated from top to bottom, the upper end of the anchor rod cavity is exposed out of the upper end face of the outer sleeve, the lower end of the yielding cavity is exposed out of the lower end face of the outer sleeve, the circumferential inner wall of the first connecting disc assembly cavity is provided with a first threaded hole, a limiting step is arranged between the second connecting disc assembly cavity and the stranded wire cavity, and the circumferential inner wall of the yielding cavity is provided with a second threaded hole;
the outer wall of the circumference of the first steel strand connecting disc is provided with a first external thread matched with the first threaded hole, and a third threaded hole is formed in the middle of the first steel strand connecting disc;
a fourth threaded hole is formed in the middle of the second steel strand connecting disc;
the outer circumferential wall of the pressure yielding cylinder is provided with second external threads matched with the second threaded holes, the inner wall of the pressure yielding cylinder is provided with a plurality of annular pressure yielding sheets, and the middle positions of the pressure yielding sheets are provided with through holes;
the outer circumferential wall of the lower end of the upper anchor rod is provided with a third external thread matched with the third threaded hole;
the outer circumferential wall of the upper end of the lower anchor rod is provided with a fourth external thread matched with the fourth threaded hole;
the first steel strand connecting disc is in threaded connection with the first connecting disc assembly cavity, the upper anchor rod penetrates through the anchor rod cavity, and the lower end of the upper anchor rod is in threaded connection with the third threaded hole;
the second steel strand connecting disc is placed in a second connecting disc assembling cavity, the upper end edge of the second steel strand connecting disc is lapped on the limiting step, the lower anchor rod penetrates through the yielding cavity, and the upper end of the lower anchor rod is in threaded connection with the fourth threaded hole;
a plurality of steel strands are connected between the first steel strand connecting disc and the second steel strand connecting disc, and when the edge of the second steel strand connecting disc is lapped on the limiting step, the steel strands are in a loose state;
let press a section of thick bamboo threaded connection in letting press the cavity, the stock passes down let the through-hole in the middle of the preforming, the preforming overlap joint of letting of the top the lower extreme border of second steel strand wires connection pad.
Preferably, the outer sleeve comprises a left half sleeve and a right half sleeve which are semi-cylindrical in outline, the left half sleeve and the right half sleeve are assembled and connected into a whole, and one of the left half sleeve and the right half sleeve is provided with internal threads on the inner wall of the first connecting disc assembling cavity.
Preferably, the left half sleeve and the right half sleeve are assembled and connected into a whole through a hoop.
Preferably, the cooperation department of left half sleeve and right half sleeve and clamp is provided with assembly groove, the clamp is located in the assembly groove.
Preferably, the first steel strand connecting disc is provided with a first wire hole along the axial direction, the upper end surface of the first steel strand connecting disc is provided with a first sinking groove at the edge of the first wire hole, the upper end of the steel strand penetrates through the first wire hole, the upper end of the steel strand is provided with a first limiting block, and the first limiting block is positioned in the first sinking groove; the second wire hole is seted up along the axial to the second steel strand connection pad, the heavy groove of second is seted up at the border in the second wire hole to the lower terminal surface of second steel strand connection pad, the lower extreme of steel strand passes the second wire hole, the lower extreme of steel strand is equipped with the second stopper, the second stopper is located the heavy inslot of second.
Preferably, the plurality of pressure-yielding sheets are arranged at a set distance along the axial direction of the pressure-yielding cylinder.
Preferably, the thickness of the pressing sheets is increased in sequence from top to bottom along the axial direction of the pressing cylinder.
A supporting method suitable for fault anchoring is provided, wherein the anchor rod device suitable for fault anchoring is applied;
the method comprises the following steps:
step 1, drilling holes in surrounding rock to form anchor rod drill holes and determining positions of broken layers in the anchor rod drill holes, and setting the lengths of an upper anchor rod and a lower anchor rod according to the depth of the anchor rod drill holes and the positions of the broken layers in the anchor rod drill holes;
firstly, connecting the upper end of a steel strand with a first steel strand connecting disc, connecting the first steel strand connecting disc in an assembly cavity of the first connecting disc, penetrating an upper anchor rod through a cavity of the anchor rod, and connecting the lower end of the upper anchor rod in a third threaded hole of the first steel strand connecting disc;
connecting the lower end of the steel strand with a second steel strand connecting disc, placing the second steel strand connecting disc in a second connecting disc assembly cavity, overlapping the upper end edge of the second steel strand connecting disc on the limiting step to enable the steel strand to be in a loose state, penetrating a lower anchor rod through a yielding cavity, and connecting the upper end of the lower anchor rod to a fourth threaded hole of the second steel strand connecting disc;
finally, the yielding cylinder is in threaded connection with the yielding cavity, the lower anchor rod penetrates through a through hole in the middle of the yielding plate, and the uppermost yielding plate is lapped with the lower end edge of the second steel strand connecting plate;
step 2, an anchoring agent is placed in the anchor rod drill hole, an anchor rod device suitable for fault anchoring is placed in the anchor rod drill hole, a lower anchor rod is located inside the anchor rod drill hole, an upper anchor rod is located outside the anchor rod drill hole, an outer sleeve corresponds to the position of a fault layer in the anchor rod drill hole, the anchor rod device suitable for fault anchoring is connected with surrounding rocks in an anchoring mode through the anchoring agent, and the outer end of the upper anchor rod is fixed on the outer wall of the surrounding rocks through an anchoring assembly;
and 3, when the fault dislocation occurs, the lower anchor rod moves in a dislocation mode relative to the upper anchor rod, the outer sleeve is bent, meanwhile, the second steel strand connecting disc is far away from the first steel strand connecting disc, part or all of the steel strands are changed into a tensioning state from a loosening state, the second steel strand connecting disc moves along the axial direction of the pressure-yielding cylinder, the pressure-yielding piece is extruded and deformed, and finally the steel strands and the pressure-yielding piece reach a static balance state.
The beneficial technical effects of the invention are as follows:
according to the anchor rod device and the supporting method suitable for fault anchoring, the outer sleeve corresponds to the position of the fault in the anchor rod drill hole, and in the normal supporting process, the whole device is connected into an integral structure and can bear axial stress, so that the surrounding rock is supported; when the fault dislocation takes place, the anchor rod takes place the dislocation for last stock and removes down, the outer sleeve is hollow structure so that the outer sleeve takes place the bending in stranded conductor cavity position at stranded conductor cavity position, and simultaneously, first steel strand wires connection pad is kept away from to the second steel strand wires connection pad, partial or whole steel strand wires become the tensioning state by the relaxation state, atress is in order to strengthen the joint strength of anchor rod and lower anchor rod behind the steel strand wires tensioning, second steel strand wires connection pad is along the axial displacement who lets press the section of thick bamboo, let the clamp plate by extrusion deformation realize letting press the buffering, continuous tensioning along with the steel strand wires, let the clamp plate continuously by extrusion deformation, finally make the steel strand wires, let the clamp plate reach static balance state. So, can make the stock device bear because of the part shear stress and the instantaneous great axial stress that the fault dislocation produced in the fault position, avoid the stock device to break, keep the integrality that the stock device strutted, realize the safety, the stable support to the country rock.
Drawings
Fig. 1 is a schematic structural diagram of a bolting device suitable for fault anchoring according to an embodiment of the invention;
fig. 2 is a supporting layout diagram of a bolting device suitable for fault anchoring according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of an outer sleeve of a bolting device for fault anchoring according to an embodiment of the invention;
FIG. 4 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;
FIG. 5 is a sectional view taken along line B-B of FIG. 1;
FIG. 6 is a cross-sectional view taken at C-C of FIG. 1;
FIG. 7 is a cross-sectional view taken along line D-D of FIG. 1;
fig. 8 is a top view of a first steel strand connecting disc in an anchor rod device suitable for fault anchoring according to an embodiment of the invention;
fig. 9 is a bottom view of a second steel strand connecting disc in the anchor rod device suitable for fault anchoring according to the embodiment of the invention;
fig. 10 is a schematic view illustrating the assembly of an outer sleeve in a bolting device for fault anchoring according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings in combination with the specific embodiments. Certain embodiments of the invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, various embodiments of the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In an embodiment of the present invention, an anchor rod device suitable for fault anchoring and a supporting method suitable for fault anchoring are provided, please refer to fig. 1 to 10.
An anchor rod device suitable for fault anchoring comprises an outer sleeve 1, a first steel strand connecting plate 21, a second steel strand connecting plate 22, a yielding cylinder 3, an upper anchor rod 41, a lower anchor rod 42 and a steel strand 5.
The anchor rod cavity 11, the first connecting disc assembly cavity 12, the stranded wire cavity 13, the second connecting disc assembly cavity 14 and the yielding cavity 15 are sequentially formed in the outer sleeve 1 from top to bottom, and the anchor rod cavity 11, the first connecting disc assembly cavity 12, the stranded wire cavity 13, the second connecting disc assembly cavity 14 and the yielding cavity 15 are sequentially communicated. Wherein, the upper end of the anchor rod cavity 11 is exposed out of the upper end surface of the outer sleeve 1, and the lower end of the pressure cavity 15 is exposed out of the lower end surface of the outer sleeve 1; the circumferential inner wall of the first connecting disc assembly cavity 12 is provided with a first threaded hole 121, a limiting step 16 is arranged between the second connecting disc assembly cavity 14 and the stranded wire cavity 13, and the circumferential inner wall of the yielding cavity 15 is provided with a second threaded hole 151.
The outer wall of the circumference of the first steel strand connecting disc 21 is provided with a first external thread, the first external thread is matched with the first threaded hole 121, and the middle position of the first steel strand connecting disc 21 is provided with a third threaded hole 211.
A fourth threaded hole 221 is formed in the middle of the second steel strand connecting disc 22.
Let the circumference outer wall of pressing a section of thick bamboo 3 set up to second external screw thread, and second external screw thread matches with second screw hole 151, lets the inner wall of pressing a section of thick bamboo 3 be provided with four annular and lets the wafer 6, lets the intermediate position of wafer 6 set up to the through-hole.
Four let preforming 6 along letting the axial interval of pressing a section of thick bamboo 3 set for the distance and arrange to when second steel strand wires connection pad 22 along the axial displacement who lets pressing a section of thick bamboo 3, let preforming 6 act on second steel strand wires connection pad 22 in proper order by four, four let preforming 6 realize in proper order letting press the buffering. Adjacent let the preforming 6 interval set distance arrange, for the space of letting the preforming 6 of top to leave the downward deformation, let preforming 6 through being extruded deformation and realize letting press the buffering. Wherein, along the axial direction of the pressure-yielding cylinder 3, the thicknesses of the four pressure-yielding sheets 6 are sequentially increased from top to bottom, the deformation quantities of the four pressure-yielding sheets 6 from top to bottom, which are extruded and deformed, are gradually reduced, and the four pressure-yielding sheets 6 from top to bottom realize progressive pressure-yielding buffering; after the upper yielding piece 6 is extruded and deformed, the pressing cylinder 3 is firmly connected with the second steel strand connecting disc 22 through the lower yielding piece 6, and the anchor rod device is kept to bear large axial stress.
The outer wall of the lower end circumference of the upper anchor rod 41 is provided with a third external thread, and the third external thread is matched with the third threaded hole 211.
The upper circumferential outer wall of the lower anchor rod 42 is provided with a fourth external thread, and the fourth external thread is matched with the fourth thread 221.
The first steel strand connecting disc 21 is in threaded connection with the first connecting disc assembly cavity 12, the upper anchor rod 41 penetrates through the anchor rod cavity 11, and the lower end of the upper anchor rod 41 is in threaded connection with the third threaded hole 211.
The second steel strand connecting disc 22 is placed in the second connecting disc assembling cavity 14, the upper end edge of the second steel strand connecting disc 22 is lapped on the limiting step 16, the lower anchor rod 42 penetrates through the yielding cavity 15, and the upper end of the lower anchor rod 42 is in threaded connection with the fourth threaded hole 221.
A plurality of steel strands 5 are connected between the first steel strand connecting disc 21 and the second steel strand connecting disc 22, and when the edge of the second steel strand connecting disc 22 is lapped on the limiting step 16, the steel strands 5 are in a loose state.
Let pressure cylinder 3 threaded connection in letting press the cavity 15, lower stock 42 passes and lets the through-hole in the middle of preforming 6, the lower extreme border of the preforming 6 overlap joint second steel strand wires connection pad 22 of letting of the top. The second stranded-wire land 22 is restrained within the second land-fitting cavity 14 by the uppermost pressure-permitting tab 6 together with the restraining step 16.
In order to facilitate the assembly of the first steel strand connecting disc 21 and the steel strands 5, the outer sleeve 1 comprises a half sleeve 11 and a right half sleeve 102, and the outer contours of the half sleeve 11 and the right half sleeve 102 are semi-cylindrical. The left half sleeve 101 and the right half sleeve 102 are assembled and connected into a whole, and the left half sleeve 101 is provided with internal threads on the inner wall of the first connecting disc assembling cavity 12. Therefore, the upper end of the steel strand 5 is connected with the first steel strand connecting disc 21, the first steel strand connecting disc 21 is connected to the left half sleeve 101 in the inner wall of the first connecting disc assembling cavity 12 in a threaded mode, and finally the right half sleeve 102 is buckled on the half sleeve 11 to enable the left half sleeve and the right half sleeve to be assembled and connected into a whole. Wherein, the left half sleeve 101 and the right half sleeve 102 are assembled and connected into a whole through a clamp 103. The fitting parts of the left half sleeve 101 and the right half sleeve 102 and the clamp 103 are provided with assembling grooves 104, and the clamp 103 is located in the assembling grooves 104, so that the clamp 103 is firmly assembled with the outer sleeve 1, and the clamp 103 is prevented from falling off from the outer sleeve 1.
In the embodiment of the invention, the invention also provides a supporting method suitable for fault anchoring, and the anchor rod device suitable for fault anchoring is applied;
the method comprises the following steps:
step 1, drilling holes in surrounding rock to form an anchor rod drilling hole 7, determining the position of a broken layer in the anchor rod drilling hole 7, and setting the lengths of an upper anchor rod 41 and a lower anchor rod 42 according to the depth of the anchor rod drilling hole 7 and the position of the broken layer in the anchor rod drilling hole 7;
firstly, connecting the upper end of a steel strand 5 with a first steel strand connecting disc 21, connecting the first steel strand connecting disc 21 in a first connecting disc assembly cavity 12, penetrating an upper anchor rod 41 through an anchor rod cavity 11, and connecting the lower end of the upper anchor rod 41 in a third threaded hole 211 of the first steel strand connecting disc 21;
then, the lower end of the steel strand 5 is connected with a second steel strand connecting disc 22, the second steel strand connecting disc 22 is placed in a second connecting disc assembly cavity 14, the upper end edge of the second steel strand connecting disc 22 is lapped on the limiting step 16, the steel strand 5 is in a loose state, the lower anchor rod 42 penetrates through the yielding cavity 15, and the upper end of the lower anchor rod 42 is connected into a fourth threaded hole 221 of the second steel strand connecting disc 22;
and finally, the pressure-yielding cylinder 3 is in threaded connection with the pressure-yielding cavity 15, the lower anchor rod 42 penetrates through a through hole in the middle of the pressure-yielding sheet 6, and the uppermost pressure-yielding sheet 6 is lapped with the lower end edge of the second steel strand connecting plate 22.
And 2, placing an anchoring agent into the anchor rod drilling hole 7, placing an anchor rod device suitable for fault anchoring into the anchor rod drilling hole 7, positioning the lower anchor rod 42 inside the anchor rod drilling hole 7, positioning the upper anchor rod 41 outside the anchor rod drilling hole 7, enabling the outer sleeve 1 to correspond to the position of the broken layer in the anchor rod drilling hole 7, anchoring the anchor rod device suitable for fault anchoring to be connected with the surrounding rock through the anchoring agent, and fixing the outer end of the upper anchor rod 41 on the outer wall of the surrounding rock through an anchoring assembly (an anchor rod disc 81 and a locking nut 82). Further, when the bolting means adapted for fault anchoring needs to be arranged inclined at a set angle with respect to the outer wall of the surrounding rock, a triangular bracket 83 may be arranged between the anchoring assembly and the outer wall of the surrounding rock.
And 3, when the fault dislocation occurs, the lower anchor rod 42 dislocates relative to the upper anchor rod 41, the outer sleeve 1 bends, meanwhile, the second steel strand connecting disc 22 is far away from the first steel strand connecting disc 21, part or all of the steel strands 5 are changed from a loose state to a tensioned state, the second steel strand connecting disc 22 moves along the axial direction of the pressure-yielding cylinder 3, the pressure-yielding sheet 6 is extruded and deformed, and finally the steel strands 5 and the pressure-yielding sheet 6 reach a static balance state.
So far, the present embodiment has been described in detail with reference to the accompanying drawings. From the above description, the person skilled in the art will have a clear understanding of the invention as applied to a bolt device for fault anchoring. According to the anchor rod device and the supporting method suitable for fault anchoring, the outer sleeve 1 corresponds to the position of the fault in the anchor rod drill hole 7, and in the normal supporting process, the whole device is connected into an integral structure and can bear axial stress, so that surrounding rock is supported; when fault dislocation happens, the lower anchor rod 42 moves in a dislocation mode relative to the upper anchor rod 41, the outer sleeve 1 is of a hollow structure at the position of the stranded wire cavity 13, so that the outer sleeve 1 is bent at the position of the stranded wire cavity 13, meanwhile, the second steel stranded wire connecting disc 22 is far away from the first steel stranded wire connecting disc 21, part or all of the steel stranded wires 5 are changed into a tensioning state from a loosening state, the steel stranded wires 5 are stressed after being tensioned to strengthen the connection strength of the upper anchor rod 41 and the lower anchor rod 42, the second steel stranded wire connecting disc 22 moves along the axial direction of the pressure cylinder 3, the pressure plate 6 is extruded and deformed to achieve pressure yielding buffering, the steel stranded wires 5 are continuously tensioned, the pressure plate 6 is continuously extruded and deformed, and finally the steel stranded wires 5 and the pressure plate 6 reach a static balance state. So, can make the stock device bear because of the part shear stress and the instantaneous great axial stress that the fault dislocation produced in the fault position, avoid the stock device to break, keep the integrality that the stock device strutted, realize the safety, the stable support to the country rock.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides an anchor rod device suitable for fault anchor which characterized in that: the steel strand compression device comprises an outer sleeve, a first steel strand connecting disc, a second steel strand connecting disc, a pressure relief cylinder, an upper anchor rod, a lower anchor rod and a steel strand;
the inner part of the outer sleeve is sequentially provided with an anchor rod cavity, a first connecting disc assembly cavity, a stranded wire cavity, a second connecting disc assembly cavity and a yielding cavity which are sequentially communicated from top to bottom, the upper end of the anchor rod cavity is exposed out of the upper end face of the outer sleeve, the lower end of the yielding cavity is exposed out of the lower end face of the outer sleeve, the circumferential inner wall of the first connecting disc assembly cavity is provided with a first threaded hole, a limiting step is arranged between the second connecting disc assembly cavity and the stranded wire cavity, and the circumferential inner wall of the yielding cavity is provided with a second threaded hole;
the outer wall of the circumference of the first steel strand connecting disc is provided with a first external thread matched with the first threaded hole, and a third threaded hole is formed in the middle of the first steel strand connecting disc;
a fourth threaded hole is formed in the middle of the second steel strand connecting disc;
the circumferential outer wall of the pressure yielding cylinder is provided with second outer threads matched with the second threaded holes, the inner wall of the pressure yielding cylinder is provided with a plurality of annular pressure yielding sheets, and the middle positions of the pressure yielding sheets are provided with through holes;
the outer wall of the circumference of the lower end of the upper anchor rod is provided with a third external thread matched with the third threaded hole;
the outer circumferential wall of the upper end of the lower anchor rod is provided with a fourth external thread matched with the fourth threaded hole;
the first steel strand connecting disc is in threaded connection with the first connecting disc assembly cavity, the upper anchor rod penetrates through the anchor rod cavity, and the lower end of the upper anchor rod is in threaded connection with the third threaded hole;
the second steel strand connecting disc is placed in a second connecting disc assembling cavity, the upper end edge of the second steel strand connecting disc is lapped on the limiting step, the lower anchor rod penetrates through the yielding cavity, and the upper end of the lower anchor rod is in threaded connection with the fourth threaded hole;
a plurality of steel strands are connected between the first steel strand connecting disc and the second steel strand connecting disc, and when the edge of the second steel strand connecting disc is lapped on the limiting step, the steel strands are in a loose state;
let press a section of thick bamboo threaded connection in letting press the cavity, the stock passes down let the through-hole in the middle of the preforming, the preforming overlap joint of letting of the top the lower extreme border of second steel strand wires connection pad.
2. A bolting device suitable for fault anchorage according to claim 1, characterised in that: the outer sleeve comprises a left half sleeve and a right half sleeve, the outer contours of the left half sleeve and the right half sleeve are semi-cylindrical, the left half sleeve and the right half sleeve are assembled and connected into a whole, and one of the left half sleeve and the right half sleeve is provided with an internal thread on the inner wall of the first connecting disc assembling cavity.
3. A bolting device suitable for fault anchorage according to claim 2, characterised in that: the left half sleeve and the right half sleeve are assembled and connected into a whole through a hoop.
4. A bolting device suitable for fault anchorage according to claim 1, characterised in that: the cooperation department of half sleeve on a left side and half sleeve on the right side and clamp is provided with the assembly recess, the clamp is located in the assembly recess.
5. A bolting device suitable for fault anchorage according to claim 1, characterised in that: the first steel strand connecting disc is provided with a first wire hole along the axial direction, the upper end face of the first steel strand connecting disc is provided with a first sinking groove at the edge of the first wire hole, the upper end of the steel strand penetrates through the first wire hole, a first limiting block is assembled at the upper end of the steel strand, and the first limiting block is positioned in the first sinking groove; the second wire hole is seted up along the axial to the second steel strand connection pad, the heavy groove of second is seted up at the border in the second wire hole to the lower terminal surface of second steel strand connection pad, the lower extreme of steel strand passes the second wire hole, the lower extreme of steel strand is equipped with the second stopper, the second stopper is located the heavy inslot of second.
6. A bolting device suitable for fault anchorage according to claim 1, characterised in that: the plurality of pressure-yielding sheets are arranged at intervals of a set distance along the axial direction of the pressure-yielding cylinder.
7. A bolting device suitable for fault anchorage according to claim 6, characterised in that: along letting the axial of pressing a section of thick bamboo from top to bottom, a plurality of lets the thickness of preforming increase in proper order.
8. A supporting method suitable for fault anchoring, characterized in that the bolting device suitable for fault anchoring of any one of claims 1-7 is applied;
the method comprises the following steps:
step 1, drilling holes in surrounding rock to form anchor rod drill holes and determining positions of broken layers in the anchor rod drill holes, and setting the lengths of an upper anchor rod and a lower anchor rod according to the depth of the anchor rod drill holes and the positions of the broken layers in the anchor rod drill holes;
connecting the upper end of a steel strand with a first steel strand connecting disc, connecting the first steel strand connecting disc in an assembly cavity of the first connecting disc, penetrating an upper anchor rod through a cavity of the anchor rod, and connecting the lower end of the upper anchor rod in a third threaded hole of the first steel strand connecting disc;
connecting the lower end of the steel strand with a second steel strand connecting disc, placing the second steel strand connecting disc in a second connecting disc assembly cavity, overlapping the upper end edge of the second steel strand connecting disc on the limiting step to enable the steel strand to be in a loose state, penetrating a lower anchor rod through a yielding cavity, and connecting the upper end of the lower anchor rod to a fourth threaded hole of the second steel strand connecting disc;
finally, the yielding cylinder is in threaded connection with the yielding cavity, the lower anchor rod penetrates through a through hole in the middle of the yielding plate, and the uppermost yielding plate is lapped with the lower end edge of the second steel strand connecting plate;
step 2, an anchoring agent is placed into the anchor rod drill hole, an anchor rod device suitable for fault anchoring is placed into the anchor rod drill hole, a lower anchor rod is located inside the anchor rod drill hole, an upper anchor rod is located outside the anchor rod drill hole, an outer sleeve corresponds to the position of a broken layer in the anchor rod drill hole, the anchor rod device suitable for fault anchoring is connected with the surrounding rock through the anchoring agent in an anchoring mode, and the outer end of the upper anchor rod is fixed on the outer wall of the surrounding rock through an anchoring assembly;
and 3, when the fault dislocation occurs, the lower anchor rod moves in a dislocation way relative to the upper anchor rod, the outer sleeve is bent, meanwhile, the second steel strand connecting disc is far away from the first steel strand connecting disc, part or all of the steel strands are changed into a tensioning state from a loosening state, the second steel strand connecting disc moves along the axial direction of the yielding cylinder, the yielding piece is extruded and deformed, and finally the steel strands and the yielding piece reach a static balance state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211045246.1A CN115614078A (en) | 2022-08-30 | 2022-08-30 | Anchor rod device suitable for fault anchoring and supporting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211045246.1A CN115614078A (en) | 2022-08-30 | 2022-08-30 | Anchor rod device suitable for fault anchoring and supporting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115614078A true CN115614078A (en) | 2023-01-17 |
Family
ID=84856773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211045246.1A Pending CN115614078A (en) | 2022-08-30 | 2022-08-30 | Anchor rod device suitable for fault anchoring and supporting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115614078A (en) |
-
2022
- 2022-08-30 CN CN202211045246.1A patent/CN115614078A/en active Pending
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