CN102182197B - Bundled grouting anchor rope reinforcing method for road rock slope - Google Patents
Bundled grouting anchor rope reinforcing method for road rock slope Download PDFInfo
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- CN102182197B CN102182197B CN201110074829.2A CN201110074829A CN102182197B CN 102182197 B CN102182197 B CN 102182197B CN 201110074829 A CN201110074829 A CN 201110074829A CN 102182197 B CN102182197 B CN 102182197B
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Abstract
The invention relates to a bundled grouting anchor rope reinforcing method for a road rock slope. The method comprises the following construction steps of: drilling an anchor hole in the slope rock, forming dug grooves on the surface layer of the slope rock along the transverse connecting line and the vertical connecting line of the opening of the anchor hole, manufacturing steel members of a bundled anchor rope in a workshop, assembling the steel members on the construction site, filling the bundled anchor rope into the anchor hole, pumping shrinkage-free cement mortar into the anchor hole, arranging an anchorage device base at the new opening of the anchor hole, tensioning the steel stranded wires of the bundled anchor rope, locking the steel stranded wires by using an anchorage device, arranging constructional steel bars of lattice beams in the dug grooves, and casting the lattice beams by using C25 concrete. The bundled anchor rope used in the method has a combined structure and is provided with a special reverse circulation slurry conveying passage, and mooring anchors of all the steel stranded wires are restrained together, so the bundled anchor rope has good integrity, the inclination angle of the anchor hole can be reduced as much as possible, and the caliber of the anchor hole can be an optimal value. Even if the hole collapses, good grouting effect can also be obtained.
Description
Technical field
The present invention relates to a kind of cluster type grouting cable anchor reinforcing method of Highway Rock Slopes.
Background technology
In the engineering of excavation Highway Rock Slopes, be all to use anchor cable to reinforce in the past.The long 20-50m of this anchor cable, is comprised of many steel strand, has a mooring anchor on the top of every steel strand.Anchor hole is made with hidden hole drilling, and anchor hole is tilted to down to be squeezed in slope rock mass, and its bore is 120-130mm.When all steel strand are all inserted into after anchor hole, adopt forward slip casting method cement injection mortar.Cement mortar is injected from the aperture of anchor hole, utilizes gravity current at the bottom of hole.
Because the length of anchor hole is excessive, at the bottom of making cement mortar successfully flow to hole, the bore of anchor hole and inclination angle often adopt larger numerical value.The bore of anchor hole is excessive, has increased the workload of boring and cement injection mortar; The inclination angle of anchor hole is excessive, has both strengthened the difficulty of boring, has shortened again effective use length of anchor cable.Once generation collapse hole, the inflow of the native stone block water cement mortar of slump, causes the empty note section of appearance in anchor hole.
In anchor hole, the several steel strand that load are loose condition (of surface), and they are difficult to accurately in place.Cement mortar flows into from the aperture of anchor hole, owing to being subject to stopping of many steel strand in way, therefore cannot guarantee grouting quality, more cannot check anchoring effect.When tension steel strand, the poor anchor cable of slip casting effect is extracted from anchor hole by whole.As a rule, steel strand can be put in place by smooth stretch-draw, but its safety factor cannot guarantee, therefore the strengthening quality of Highway Rock Slopes also can obviously reduce.
The present invention is exactly for these problems, a kind of cluster type grouting cable anchor reinforcing method of meticulously being developed by the inventor.Adopt the present invention to reinforce Highway Rock Slopes, method of operating is easy, and the speed of construction is fast, and the quality of construction is high.
Summary of the invention
Problem to be solved by this invention will provide a kind of construction technology simple exactly, can make excavated Highway Rock Slopes obtain good construction method of reinforcing.
The object of the invention is to be achieved through the following technical solutions:
A cluster type grouting cable anchor reinforcing method for Highway Rock Slopes, carries out the operational sequence by following: in the slope rock mass of Highway Rock Slopes, drill anchor hole successively; Horizontal line and vertical line along anchor hole aperture are established box cut on the top layer of Highway Rock Slopes; In workshop, make the steel member of cluster type anchor cable; At the construction field (site) assembling and to the in-built cluster type anchor cable of filling out of anchor hole; To force feed non-shrinkage cement mortar in anchor hole; Anchor device pedestal is installed at place, new aperture at anchor hole; The steel strand of stretch-draw cluster type anchor cable, and be locked with ground tackle; The distributing bar of lattice girder is installed in box cut, and is built lattice girder; The cluster type grouting cable anchor reinforcing method of this Highway Rock Slopes is characterised in that:
On Highway Rock Slopes, all anchor holes are all tilted to down by same angle and squeeze in slope rock mass, the angle of they and horizontal plane is not less than 10 degree, its length is 20-50m, its bore is 110mm, its aperture is along horizontal and vertical all arranged with intervals to equate, concrete numerical value is between 2500-3500mm; Its width of described box cut is 400mm, and the degree of depth is 300mm; Two facades of this box cut all use electronic cutting blade cutting to form, and all perpendicular with Highway Rock Slopes, and the rock between two facades is rejected with electric shovel piecemeal; On the top layer of Highway Rock Slopes, whole box cut distributes as net shape, and at each Nodes of this grid, anchor hole is all dug up a part, all forms a new aperture; The width of described lattice Liangqi distributing bar is 330mm, is highly 430mm, and it is dark that it embeds the interior 270mm of described box cut, and utilize anchor pole and slope rock mass to fix; On the top layer of Highway Rock Slopes, this distributing bar distributes as net shape, and at each Nodes of this grid, is all wrapped in the ground tackle of the cluster type anchor cable described in and stretches out the steel strand of this ground tackle; Described lattice girder C25 pouring concrete, its width is 400mm, is highly 500mm, it is dark that it embeds the interior 300mm of described box cut; On the top layer of Highway Rock Slopes, this lattice girder distributes as net shape, and at each Nodes of this grid, is all sealing the ground tackle of the cluster type anchor cable described in and is stretching out the steel strand of this ground tackle; The described axis of cluster type anchor cable and the axis of anchor hole coincide; From the Di Xiangxin aperture, hole of anchor hole, be followed successively by 1 pallet of this cluster type anchor cable, 1 chassis, 3 diagonal braces, 1 joint Grout-jetting pipe, several sections of and even ten several sections of feed pipe for mortar and 1 joint inlet pipe; At the bottom of the hole of its pallet exposed face of described pallet and anchor hole, contact; The main body of described inlet pipe is positioned at anchor hole, and its tail end that enters to starch main steel pipe stretches out the new aperture 300mm of anchor hole, and it enters to starch the new aperture 300mm of the recessed anchor hole of locating pin; Between described Grout-jetting pipe and feed pipe for mortar, between every two adjacent joint feed pipe for mortar, between feed pipe for mortar and inlet pipe, be all provided with a steel sleeve; Described chassis, 3 diagonal braces and Grout-jetting pipe are combined by soldering group; Described chassis and pallet utilize a bolt to fix, and in 6 pairs of holddown grooves that pallet and chassis form, build-in the mooring anchor of 6 steel strand members respectively; The steel strand of these 6 steel strand members pass respectively 6 steel strand holes on chassis, and with the circumferential distance equating, are distributed in the outside of Grout-jetting pipe, feed pipe for mortar and inlet pipe, and its tail end all stretches out the new aperture 600mm of anchor hole; Described steel strand and Grout-jetting pipe, feed pipe for mortar and inlet pipe utilize colligation galvanized wire to bundle; The institute that described non-shrinkage cement mortar is full of in anchor hole has living space; Described chassis is provided with 1 chassis embedded surface, 1 chassis exposed face, 6 chassis holddown grooves, 1 chassis bolt hole and 6 steel strand holes; Described pallet is provided with 1 pallet embedded surface, 1 pallet exposed face, 6 pallet holddown grooves and 1 pallet bolt hole.
Described pallet is that the steel cylinder that 105mm, thickness are 40mm is made with a bottom surface diameter, and the cylindrical bottom surface of this steel is pallet embedded surface, and another bottom surface is pallet exposed face; Along the cylindrical axis of this steel, drilling a diameter is the pallet bolt hole that 12.5mm, length are 40mm; From pallet embedded surface inwards, along perpendicular direction, drill 6 columniform pallet holddown grooves; These pallet holddown grooves distribute with the circumferential distance that equates, and its bottom surface diameter is 32mm, and the degree of depth is 25mm, the axis of their axis and pallet bolt hole apart from being all 33mm.
Described chassis is to be also that 105mm, thickness are 40mm steel cylinder is made with a bottom surface diameter, and its chassis embedded surface, chassis exposed face, chassis holddown groove and chassis bolt hole are identical with pallet bolt hole with pallet embedded surface, pallet exposed face, the pallet holddown groove of described pallet respectively; Position, center in each holddown groove bottom surface, chassis, all drilling a diameter is the steel strand hole that 16mm, length are 15mm; These Dou Yu chassis, steel strand hole embedded surfaces are perpendicular.
At the top of described cluster type anchor cable, before and after pallet and chassis, arrange; The pallet embedded surface of pallet parallels with the chassis embedded surface on chassis and at a distance of 10mm; 6 pallet holddown grooves of pallet and 6 chassis holddown grooves on chassis are symmetrical, form 6 pairs of holddown grooves; The long 120mm of described bolt, diameter are 12mm, and its main body is arranged in the pallet bolt hole of pallet and the chassis bolt hole on chassis, and its top is positioned at side outside the chassis exposed face on chassis, is provided with a nut of tightening at its top.
Described Grout-jetting pipe is that 48mm, wall thickness are 4mm welded steel pipes is made with external diameter, and its length is 1000mm, at the extexine car of Grout-jetting pipe tail end, has connecting screw; The plain bar that described diagonal brace is 10mm with diameter is made, and its length is 150mm; The top of its chassis exposed face of described chassis and Grout-jetting pipe is at a distance of 100mm, and the axis of its chassis bolt hole and the axis of Grout-jetting pipe coincide; Outside at Grout-jetting pipe top, arranges 3 diagonal braces with the circumferential distance equating; All weld mutually with Grout-jetting pipe one end of these 3 diagonal braces, and the other end all welds mutually with the limit portion of chassis exposed face, and the length of all weld bonds is all not less than 25mm.
The described main steel pipe of defeated slurry is to be all that the welded steel pipes that 48mm, wall thickness are 4mm is made with external diameter with entering to starch main steel pipe; Described defeated slurry locating pin is all to make of the thick steel plate of 10mm with entering to starch locating pin, and its length is all 70-80mm, and it is highly all 31mm; The long 3.0-4.0m of the main steel pipe of defeated slurry, the extexine at its two ends all car have connecting screw, at the external surface of its mid-length, with the circumferential distance equating, 3 defeated slurry locating pins are set; Each defeated slurry locating pin longitudinally parallels and is affixed with the main steel pipe of defeated slurry, all implements bilateral straight joint full weld at its place of being affixed; Enter to starch the long 2.0-2.5m of main steel pipe, the extexine car on its top has connecting screw, at the external surface apart from its tail end 600mm place, arranges 3 enter to starch locating pin with the circumferential distance equating; It is identical with the welding manner between defeated slurry locating pin and the main steel pipe of defeated slurry with the welding manner that enters to starch between main steel pipe that this enters to starch locating pin.
Described steel strand member consists of 1 steel strand and 1 mooring anchor; Steel strand are tailored and are formed with 1860 shaped steel twisted wires; Mooring anchor is made of 40Cr alloy steel, and it is fixed on the top of steel strand, and it is the cylindrical of 31mm, high 60mm that its profile is a bottom surface diameter; Its length of described steel sleeve is that 100mm, wall thickness are 4mm, and top layer car has connecting screw within it; Described its diameter of colligation galvanized wire is 2mm.
The pallet fitting together, chassis, diagonal brace, Grout-jetting pipe and steel strand member are inserted in described anchor hole, and the tail end of Grout-jetting pipe is stayed outside the new aperture of anchor hole; The steel sleeve of screwing on described in one at the tail end of this Grout-jetting pipe; Get the feed pipe for mortar described in a joint, within its top being screwed into the other end of this steel sleeve; In the outside of connected feed pipe for mortar, be 6 steel strand that the circumferential distance that equates distributes; Along these steel strand, every 800-1000mm, the colligation galvanized wire described in 3-4 circle is all set, these steel strand are fixed together be connected feed pipe for mortar with Grout-jetting pipe; Promote the feed pipe for mortar connecting, its main body is entered in anchor hole, and its tail end is stayed outside the new aperture of anchor hole; At the tail end of this feed pipe for mortar steel sleeve of screwing on, connect in turn according to the method described above and to pushing remaining feed pipe for mortar and the inlet pipe of respectively saving in anchor hole.
At the described tail end that enters to starch main steel pipe, connect rubber tube, utilize pneumatic mortar machine to slip casting in anchor hole; At the bottom of the hole of described non-shrinkage cement mortar by the through anchor hole of inlet pipe, feed pipe for mortar and Grout-jetting pipe, then from past return between this Grout-jetting pipe, feed pipe for mortar and inlet pipe and the hole wall of anchor hole, until overflow from the new aperture of anchor hole.
Non-shrinkage cement mortar in described anchor hole reaches after final set, and the described afterbody that enters to starch main steel pipe is cut, and makes the new aperture 200mm of recessed this anchor hole of its new tail end; Remove the non-shrinkage cement mortar in the new aperture of this anchor hole, recover new aperture with the dark vestibule of interior 200mm; In the slope rock mass around of its new aperture of this anchor hole, squeeze into four expansion bolts, fix the anchor device pedestal described in; Between this anchor device pedestal and slope rock mass, dry cement mortar in filling; This anchor device pedestal is made of the steel plate of 280 * 280 * 20mm, at the position, center of its plane, is provided with the circular hole that a diameter is 84mm, and 6 steel strand of described cluster type anchor cable pass from this circular hole.
Described ground tackle and the lateral surface of anchor device pedestal are affixed; Non-shrinkage cement mortar in described anchor hole reaches after design strength, 6 steel strand of the cluster type anchor cable in this anchor hole is carried out to stretch-draw, and with this ground tackle, it is locked, and stretching force used is 500-700kN; Injected hole by this ground tackle is to injected water mud in anchor hole, to fill up holes all in anchor hole.
Described lattice Liangqi distributing bar consists of main muscle and stirrup; The indented bars that main muscle is 12mm with diameter is made, and in end face, the He Liangge side, bottom surface of distributing bar, this main muscle all be take 100mm as spacing setting; Stirrup bends and forms with the plain bar that diameter is 8mm, along main muscle longitudinally, it take 150mm as spacing setting; The indented bars that described anchor pole is 20mm with diameter is made; Along described box cut, two row's anchor poles are squeezed in slope rock mass, its every row be take 400mm as spacing setting, and this two rows anchor pole lays respectively at the inner side of its main muscle in both sides of distributing bar; In the intersection of each anchor pole and main muscle, all implement bilateral welding; The top of all anchor poles all maintains an equal level mutually with the end face of distributing bar, and the degree of depth that they are driven into slope rock mass is 600-1500mm.
Advantage of the present invention is: the cluster type anchor cable using is combining structure, and its steel member all can carry out standardized production in workshop, except steel strand, and its maximum shortage in weight 20kg that decomposes.In narrow situation, this cluster type anchor cable is not only convenient to assembling but also is easy to insert in anchor hole on construction ground.This cluster type anchor cable is provided with the defeated slurry passage of special anti-circulation, and the mooring anchor of whole steel strand is constrained in together, therefore the inclination angle of anchor hole can reduce as far as possible, its bore can be selected optimal values.Even the in the situation that of collapse hole, also can obtain good slip casting effect.
Accompanying drawing explanation
Fig. 1 squeezes into the front schematic view of anchor hole in slope rock mass in the present invention.
Fig. 2 is the side generalized section of squeezing into anchor hole in the present invention in slope rock mass.
Fig. 3 arranges the front schematic view of box cut on top layer, rock hillside in the present invention.
Fig. 4 arranges the side generalized section of box cut on top layer, rock hillside in the present invention.
Fig. 5 packs the front schematic view of cluster type grouting cable anchor in the anchor hole of slope rock mass in the present invention.
Fig. 6 is the front schematic view of at the place, new aperture of each anchor hole, anchor device pedestal being installed in the present invention.
Fig. 7 installs the front schematic view of lattice girder distributing bar in box cut in the present invention.
Fig. 8 pours into a mould the front schematic view of lattice girder in box cut in the present invention.
Fig. 9 is the front schematic view of embedded surface one side in chassis in the present invention.
Figure 10 is the front schematic view of exposed face one side in chassis in the present invention.
Figure 11 is the front schematic view of pallet embedded surface one side in the present invention.
Figure 12 is the front schematic view of pallet exposed face one side in the present invention.
Figure 13 is the schematic cross-sectional view of cluster type anchor cable top steel member in the present invention.
Figure 14 is the side schematic view of cluster type anchor cable top steel member in the present invention.
Figure 15 is the schematic cross-sectional view at its defeated slurry locating pin position of cluster type anchor cable feed pipe for mortar in the present invention.
Figure 16 is the schematic cross-sectional view of the adjacent two feed pipe for mortar connecting portions of cluster type anchor cable in the present invention.
Figure 17 is the schematic cross-sectional view at the cluster type anchor cable feed pipe for mortar main steel pipe of its defeated slurry position in the present invention.
Figure 18 is the side schematic view that chassis in the present invention, diagonal brace and Grout-jetting pipe fit together.
Figure 19 is chassis in the present invention, diagonal brace and the Grout-jetting pipe side schematic view together with steel strand Components Composition.
Figure 20 is the side schematic view of feed pipe for mortar in the present invention.
Figure 21 is the side schematic view at cluster type anchor cable feed pipe for mortar position in the present invention.
Figure 22 is the side schematic view of inlet pipe in the present invention.
Figure 23 is the side schematic view at cluster type anchor cable inlet pipe position in the present invention.
Figure 24 is the side schematic view of adjacent two joint feed pipe for mortar connecting portions in the present invention.
Figure 25 is the side schematic view of the adjacent two joint feed pipe for mortar connecting portions of cluster type anchor cable in the present invention.
Figure 26 is that in the present invention, anchor device pedestal is located the front schematic view of installation in position in the new aperture of anchor hole.
Figure 27 is the front schematic view that in the present invention, steel wire bundle is locked by ground tackle.
Figure 28 be in the present invention in slope rock mass the side generalized section of cluster type grouting cable anchor.
Figure 29 is the side generalized section of cluster type grouting cable anchor after by stretch-draw in the present invention.
Figure 30 be in the present invention in box cut the side generalized section of lattice girder distributing bar installation in position.
Figure 31 be in the present invention in box cut the side generalized section of lattice girder.
Reference numeral
1 anchor hole, 2 chassis, 3 pallets, 4 diagonal braces, 5 Grout-jetting pipes, 6 feed pipe for mortar, 7 inlet pipes, 8 steel strand members, 9 bolts, 10 colligation galvanized wires, 11 steel sleeves, 12 non-shrinkage cement mortars, 13 slope rock masses, 14 ground tackles, 15 anchor device pedestals, 16 lattice girders, 17 box cuts, 18 distributing bars, 19 anchor poles, 2-1 chassis embedded surface, 2-2 chassis exposed face, 2-3 chassis holddown groove, 2-4 chassis bolt hole, 2-5 steel strand hole, 3-1 pallet embedded surface, 3-2 pallet exposed face, 3-3 pallet holddown groove, 3-4 pallet bolt hole, the main steel pipe of the defeated slurry of 6-1, the defeated slurry locating pin of 6-2, 7-1 enters to starch main steel pipe, 7-2 enters to starch locating pin, 8-1 steel strand, 8-2 mooring anchor, the main muscle of 18-1, 18-2 stirrup.
Below in conjunction with accompanying drawing 1-31, describe the specific implementation method that adopts the present invention to reinforce Highway Rock Slopes in detail.
The specific embodiment
Shown in accompanying drawing 1-31: in the front of Highway Rock Slopes, set up hidden hole drilling and drill anchor hole 1.All anchor holes 1 are all tilted to down by same angle and squeeze in slope rock mass 13, the angle of they and horizontal plane is not less than 10 degree, and its length is 20-50m, and its bore is 110mm, its aperture is along horizontal and vertical all arranged with intervals to equate, concrete numerical value is between 2500-3500mm.
On the top layer of Highway Rock Slopes, along horizontal line and the vertical line in anchor hole 1 aperture, establish respectively box cut 17.The wide 400mm of box cut 17, dark 300mm, the facade of its both sides all use electronic cutting blade cutting to form, and all perpendicular with Highway Rock Slopes, two facades electric shovel piecemeal rejecting for rock.Intersection in each horizontal box cut 17 with vertical box cut 17, anchor hole 1 is all dug up a part, all forms a new aperture.
Bottom surface diameter of pallet 3 use is that the steel cylinder that 105mm, thickness are 40mm is made, and it forms by lathe car system, and an one bottom surface is pallet embedded surface 3-1, and another bottom surface is pallet exposed face 3-2.Pallet embedded surface 3-1 is made progress and it is the level of state, with drilling machine, drill vertically downward 1 pallet bolt hole 3-4 and 6 pallet holddown groove 3-3.The axis of pallet bolt hole 3-4 and the cylindrical axis of steel coincide, and its diameter is 12.5mm, and length is 40mm.The bottom surface diameter of pallet holddown groove 3-3 is 32mm, and the degree of depth is 25mm.6 pallet holddown groove 3-3 along hoop equidistantly to distribute, they to pallet bolt hole 3-4 apart from being all 33mm.
The profile on chassis 2 is identical with pallet 3, and its chassis embedded surface 2-1, chassis exposed face 2-2, chassis holddown groove 2-3 and chassis bolt hole 2-4 are identical with pallet bolt hole 3-4 with pallet embedded surface 3-1, pallet exposed face 3-2, the pallet holddown groove 3-3 of pallet respectively.Position, center in each holddown groove 2-3 bottom surface, chassis, all the diameter that longitudinally drills along chassis holddown groove 2-3 is the steel strand hole 2-5 that 16mm, length are 15mm.
Grout-jetting pipe 5 use external diameters are that 48mm, wall thickness are 4mm welded steel pipes is made, and its length is 1000mm, at the extexine car of Grout-jetting pipe 5 tail ends, have connecting screw.The plain bar that diagonal brace 4 use diameters are 10mm is made, and its length is 150mm.Chassis 2 positions by mould with Grout-jetting pipe 5, and the top of its chassis exposed face 2-2 and Grout-jetting pipe 5 is at a distance of 100mm, and the axis of its chassis bolt hole 2-4 and the axis of Grout-jetting pipe 5 coincide.Outside at Grout-jetting pipe 5 tops, arranges 3 diagonal braces 4 with the circumferential distance equating.All weld mutually with Grout-jetting pipe 5 one end of these 3 diagonal braces 4, and the other end all welds mutually with the limit portion of chassis exposed face 2-2, and the length of all weld bonds is all not less than 25mm.
The main steel pipe 6-1 of defeated slurry is to be that the welded steel pipes that 48mm, wall thickness are 4mm is made with external diameter with entering to starch main steel pipe 7-1.Defeated slurry locating pin 6-2 is that its length is all 70-80mm with the thick steel plate making of 10mm with entering to starch locating pin 7-2, and it is highly all 31mm.The long 3.0-4.0m of the main steel pipe 6-1 of defeated slurry, the extexine at its two ends all car have connecting screw, at the external surface of its mid-length, with the circumferential distance equating, 3 defeated slurry locating pin 6-2 are set.Each defeated slurry locating pin 6-2 longitudinally parallels and is affixed with the main steel pipe 6-1's of defeated slurry, all implements bilateral straight joint full weld at its place of being affixed.Enter to starch the long 2.0-2.5m of main steel pipe 7-1, the extexine car on its top has connecting screw, at the external surface apart from its tail end 600mm place, arranges 3 enter to starch locating pin 7-2 with the circumferential distance equating.It is identical with the welding manner between defeated slurry locating pin 6-2 and the main steel pipe 6-1 of defeated slurry with the welding manner that enters to starch between main steel pipe 7-1 that this enters to starch locating pin 7-2.
The length of steel sleeve 11 is that 100mm, wall thickness are 4mm, and top layer car has connecting screw within it.Between Grout-jetting pipe 5 and feed pipe for mortar 6, between two adjacent joint feed pipe for mortar 6, between feed pipe for mortar 6 and inlet pipe 7, be all provided with a steel sleeve 11.Steel strand member 8 is comprised of 1 steel strand 8-1 and 1 mooring anchor 8-2, steel strand 8-1 is tailored and is formed with 1860 shaped steel twisted wires, mooring anchor 8-2 makes of 40Cr alloy steel, and it is fixed on the top of steel strand 8-1, and it is the cylindrical of 31mm, high 60mm that its profile is a bottom surface diameter.
At the top of cluster type anchor cable, pallet embedded surface 3-1 parallels with chassis embedded surface 2-1 and at a distance of 10mm, 6 pallet holddown groove 3-3 and 6 chassis holddown groove 2-3 are symmetrical, form 6 pairs of holddown grooves.The mooring anchor 8-2 of 6 steel strand members 8 embeds respectively in these 6 pairs of holddown grooves.The long 120mm of bolt 9, diameter are 12mm, it penetrates in the pallet bolt hole 3-4 of pallet 3 and the chassis bolt hole 2-4 on chassis 2, its top is positioned at side outside the chassis exposed face 2-2 on chassis 2, is provided with a nut of tightening at its top, and pallet 3 and chassis 2 are fixed together.The steel strand 8-1 of 6 steel strand members 8 passes respectively from 6 steel strand hole 2-5 on chassis 2, is distributed in the outside of Grout-jetting pipe 5, feed pipe for mortar 6 and inlet pipe 7 with the circumferential distance equating.
The pallet fitting together 3, chassis 2, diagonal brace 4, Grout-jetting pipe 5 and steel strand member 8 are inserted in anchor hole 1, and the tail end of Grout-jetting pipe 5 is stayed outside the new aperture of anchor hole 1.At the tail end of this Grout-jetting pipe 5 steel sleeve 11 of screwing on, get a joint feed pipe for mortar 6, within its top being screwed into the other end of this steel sleeve 11.Along steel strand 8-1, every 800-1000mm, 3-4 circle colligation galvanized wire 10 is all set, 6 steel strand 8-1 are bundled be connected feed pipe for mortar 6 with Grout-jetting pipe 5.Promote the feed pipe for mortar 6 connecting, its main body is entered in anchor hole 1, and its tail end is stayed outside the new aperture of anchor hole 1.At the tail end steel sleeve 11 of screwing on of this joint feed pipe for mortar 6, connect in turn according to the method described above and to pushing remaining feed pipe for mortar 6 and the inlet pipe 7 of respectively saving in anchor hole 1.
When inlet pipe 7 be mounted in place after, its main body is positioned at anchor hole 1, it enters to starch the new aperture 300mm of recessed this anchor hole 1 of locating pin 7-2, its tail end that enters to starch main steel pipe 7-1 stretches out the new aperture 300mm of this anchor hole 1.The axis of the axis of whole cluster type anchor cable and anchor hole 1 coincides.At the tail end that enters to starch main steel pipe 7-1, connect rubber tube, utilize pneumatic mortar machine to the interior force feed non-shrinkage of anchor hole 1 cement mortar 12.At the bottom of the hole of this non-shrinkage cement mortar 12 by inlet pipe 7, feed pipe for mortar 6 and Grout-jetting pipe 5 through anchor holes 1, then from past return between this Grout-jetting pipe 5, feed pipe for mortar 6 and inlet pipe 7 and the hole wall of anchor hole 1, until overflow from the new aperture of anchor hole 1.In the situation that there is collapse hole, the native stone of slump is deposited between the hole wall and feed pipe for mortar 6 of anchor hole 1.Now can strengthen the pressure of pneumatic mortar machine, non-shrinkage cement mortar 12 can be washed stopping of these slump soil stones open, is dissolved among self, and is full of smoothly the whole spaces in anchor hole 1.
Non-shrinkage cement mortar 12 in anchor hole 1 reaches after final set, to entering to starch the afterbody of main steel pipe 7-1, cuts, and makes the new aperture 200mm of recessed this anchor hole 1 of its new tail end.Remove the non-shrinkage cement mortar 12 in this new aperture of anchor hole 1, recover the dark vestibule of 200mm in new aperture.Place, new aperture at this anchor hole 1, squeezes into four expansion bolts towards periphery in slope rock mass 13, fix an anchor device pedestal 15.Between this anchor device pedestal 15 and slope rock mass 13, dry cement mortar in filling.The steel plate of anchor device pedestal 15 use 400 * 400 * 20mm is made, and at the position, center of its plane, is provided with the circular hole that a diameter is 84mm, and 6 steel strand 8-1 of cluster type anchor cable pass from this circular hole.
Ground tackle 14 is positioned at the outside of anchor device pedestal 15, and the non-shrinkage cement mortar 12 in anchor hole 1 reaches after design strength, and 6 steel strand 8-1 of the cluster type anchor cable in anchor hole 1 are carried out to stretch-draw, and with this ground tackle 14, it is locked, and stretching force used is 500-700kN.Injected hole by this ground tackle 14 is to the interior injected water mud of anchor hole 1, to fill up spaces all in vestibule.
The distributing bar 18 of lattice girder 16 consists of main muscle 18-1 and stirrup 18-2.The indented bars that main muscle 18-1 is 12mm with diameter is made, and in end face, the He Liangge side, bottom surface of distributing bar 18, this main muscle 18-1 be take 100mm as spacing setting.Stirrup 18-2 bends and forms with the plain bar that diameter is 8mm, along main muscle 18-1 longitudinally, it take 150mm as spacing setting.In slope rock mass 13, along box cut 17, squeeze into two row's anchor poles 19, and every row be take 400mm as spacing.This two rows anchor pole 19 lays respectively at the inner side of the distributing bar 18 main muscle 18-1 in both sides, and bilateral welding is all implemented in the intersection at each anchor pole 19 with main muscle 18-1.Indented bars that anchor pole 19 use diameters are 20mm is made, and it is dark that it is anchored within slope rock mass 13 600-1500mm, and its top is fair mutually with the end face of distributing bar 18.
Along the both sides of box cut 17, in slope rock mass 13, respectively anchor into row's bolt, at the top of every anchor pole 19, weld a bolt.The template of cast lattice girder 16 is made of the thick steel plate of 3mm, and it is fixed on the outside of distributing bar 18 by this four rows bolt.The wide 400mm of box cut 17, its bottom land is recessed into Highway Rock Slopes 300mm.The wide 330mm of distributing bar 18, high 430mm, it is dark that it embeds the interior 270mm of box cut 17, protrudes Highway Rock Slopes 160mm high.The wide 400mm of lattice girder 16 of castable, high 500mm, it is dark that it embeds the interior 300mm of box cut 17, protrudes Highway Rock Slopes 200mm high.
Claims (12)
1. a cluster type grouting cable anchor reinforcing method for Highway Rock Slopes, carries out the operational sequence by following: in the slope rock mass (13) of Highway Rock Slopes, drill anchor hole (1) successively; Horizontal line and vertical line along anchor hole (1) aperture are established box cut (17) on the top layer of Highway Rock Slopes; In workshop, make the steel member of cluster type anchor cable; At the construction field (site) assembling and to the in-built cluster type anchor cable of filling out of anchor hole (1); To anchor hole (1) interior force feed non-shrinkage cement mortar (12); Anchor device pedestal (15) is installed at place, new aperture at anchor hole (1); The steel strand (8-1) of stretch-draw cluster type anchor cable, and be locked with ground tackle (14); The distributing bar (18) of lattice girder (16) is installed in box cut (17), and is built lattice girder (16); The cluster type grouting cable anchor reinforcing method of this Highway Rock Slopes is characterised in that:
On Highway Rock Slopes, all anchor holes (1) are all tilted to down by same angle and squeeze in slope rock mass (13), the angle of they and horizontal plane is not less than 10 degree, its length is 20-50m, its bore is 110mm, its aperture is along horizontal and vertical all arranged with intervals to equate, concrete numerical value is between 2500-3500mm; Its width of described box cut (17) is 400mm, and the degree of depth is 300mm; Two facades of this box cut (17) all use electronic cutting blade cutting to form, and all perpendicular with Highway Rock Slopes, and the rock between two facades is rejected with electric shovel piecemeal; On the top layer of Highway Rock Slopes, whole box cut (17) distributes as net shape, and at each Nodes of this grid, anchor hole (1) is all dug up a part, all forms a new aperture; The width of its distributing bar of described lattice girder (16) (18) is 330mm, is highly 430mm, and it is dark that it embeds the described interior 270mm of box cut (17), and utilizes anchor pole (19) and slope rock mass (13) to fix; On the top layer of Highway Rock Slopes, this distributing bar (18) distributes as net shape, and at each Nodes of this grid, is all wrapped in the ground tackle (14) of the cluster type anchor cable described in and stretches out the steel strand (8-1) of this ground tackle (14); Described lattice girder (16) is used C25 pouring concrete, and its width is 400mm, is highly 500mm, and it is dark that it embeds the described interior 300mm of box cut (17); On the top layer of Highway Rock Slopes, this lattice girder (16) distributes as net shape, and at each Nodes of this grid, is all sealing the ground tackle (14) of the cluster type anchor cable described in and is stretching out the steel strand (8-1) of this ground tackle (14); The axis of the axis of described cluster type anchor cable and anchor hole (1) coincides; From the Di Xiangxin aperture, hole of anchor hole (1), be followed successively by 1 pallet (3), 1 chassis (2), 3 diagonal braces (4), 1 joint Grout-jetting pipe (5), several sections of and even ten several sections of feed pipe for mortar (6) and the 1 joint inlet pipe (7) of this cluster type anchor cable; At the bottom of the hole of its pallet exposed face (3-2) of described pallet (3) and anchor hole (1), contact; The main body of described inlet pipe (7) is positioned at anchor hole (1), and its tail end that enters to starch main steel pipe (7-1) stretches out the new hole 300mm of anchor hole (1), and it enters to starch the new hole 300mm of the recessed anchor hole (1) of locating pin (7-2); Between described Grout-jetting pipe (5) and feed pipe for mortar (6), between every two adjacent joint feed pipe for mortar (6), between feed pipe for mortar (6) and inlet pipe (7), be all provided with a steel sleeve (11); Described chassis (2), 3 diagonal braces (4) and Grout-jetting pipe (5) are combined by soldering group; Described chassis (2) and pallet (3) utilize a bolt (9) to fix, and in 6 pairs of holddown grooves that form on pallet (3) and chassis (2), build-in the mooring anchor (8-2) of 6 steel strand members (8) respectively; The steel strand (8-1) of these 6 steel strand members (8) pass respectively 6 steel strand holes (2-5) on chassis (2), and with the circumferential distance equating, being distributed in the outside of Grout-jetting pipe (5), feed pipe for mortar (6) and inlet pipe (7), its tail end all stretches out the new aperture 600mm of anchor hole (1); Described steel strand (8-1) utilize colligation galvanized wire (10) to bundle with Grout-jetting pipe (5), feed pipe for mortar (6) and inlet pipe (7); The institute that described non-shrinkage cement mortar (12) is full of in anchor hole (1) has living space; Described chassis (2) is provided with 1 chassis embedded surface (2-1), 1 chassis exposed face (2-2), 6 chassis holddown grooves (2-3), 1 chassis bolt hole (2-4) and 6 steel strand holes (2-5); Described pallet (3) is provided with 1 pallet embedded surface (3-1), 1 pallet exposed face (3-2), 6 pallet holddown grooves (3-3) and 1 pallet bolt hole (3-4).
2. the cluster type grouting cable anchor reinforcing method of Highway Rock Slopes according to claim 1, it is characterized in that: described pallet (3) is that the steel cylinder that 105mm, thickness are 40mm is made with a bottom surface diameter, the cylindrical bottom surface of this steel is pallet embedded surface (3-1), and another bottom surface is pallet exposed face (3-2); Along the cylindrical axis of this steel, drilling a diameter is the pallet bolt hole (3-4) that 12.5mm, length are 40mm; From pallet embedded surface (3-1) inwards, along perpendicular direction, drill 6 columniform pallet holddown grooves (3-3); These pallet holddown grooves (3-3) distribute with the circumferential distance that equates, and its bottom surface diameter is 32mm, and the degree of depth is 25mm, the axis of their axis and pallet bolt hole (3-4) apart from being all 33mm.
3. the cluster type grouting cable anchor reinforcing method of Highway Rock Slopes according to claim 1, it is characterized in that: described chassis (2) are to be also that 105mm, thickness are 40mm steel cylinder is made with a bottom surface diameter, its chassis embedded surface (2-1), chassis exposed face (2-2), chassis holddown groove (2-3) and chassis bolt hole (2-4) are identical with pallet bolt hole (3-4) with pallet embedded surface (3-1), pallet exposed face (3-2), the pallet holddown groove (3-3) of described pallet (3) respectively; Position, center in each chassis holddown groove (2-3) bottom surface, all drilling a diameter is the steel strand hole (2-5) that 16mm, length are 15mm; These steel strand holes (2-5) are all perpendicular with chassis embedded surface (2-1).
4. the cluster type grouting cable anchor reinforcing method of Highway Rock Slopes according to claim 1, is characterized in that: at the top of described cluster type anchor cable, pallet (3) arranges with front and back, chassis (2); The pallet embedded surface (3-1) of pallet (3) parallels with the chassis embedded surface (2-1) of chassis (2) and at a distance of 10mm; 6 pallet holddown grooves (3-3) of pallet (3) are symmetrical with 6 chassis holddown grooves (2-3) on chassis (2), form 6 pairs of holddown grooves; The long 120mm of described bolt (9), diameter are 12mm, its main body is arranged in the pallet bolt hole (3-4) of pallet (3) and the chassis bolt hole (2-4) of chassis (2), its top is positioned at side outside the chassis exposed face (2-2) on chassis (2), is provided with a nut of tightening at its top.
5. the cluster type grouting cable anchor reinforcing method of Highway Rock Slopes according to claim 1, it is characterized in that: described Grout-jetting pipe (5) is that the welded steel pipes that 48mm, wall thickness are 4mm is made with external diameter, its length is 1000mm, at the extexine car of Grout-jetting pipe (5) tail end, has connecting screw; The plain bar that described diagonal brace (4) is 10mm with diameter is made, and its length is 150mm; Its chassis exposed face (2-2) of described chassis (2) is with the top of Grout-jetting pipe (5) at a distance of 100mm, and the axis of the axis of its chassis bolt hole (2-4) and Grout-jetting pipe (5) coincides; Outside at Grout-jetting pipe (5) top, arranges 3 diagonal braces (4) with the circumferential distance equating; All weld mutually with Grout-jetting pipe (5) one end of these 3 diagonal braces (4), and the other end all welds mutually with the limit portion of chassis exposed face (2-2), and the length of all weld bonds is all not less than 25mm.
6. the cluster type grouting cable anchor reinforcing method of Highway Rock Slopes according to claim 1, is characterized in that: the described main steel pipe of defeated slurry (6-1) and to enter to starch main steel pipe (7-1) be to be all that the welded steel pipes that 48mm, wall thickness are 4mm is made with external diameter; Described defeated slurry locating pin (6-2) and to enter to starch locating pin (7-2) be all to make of the thick steel plate of 10mm, its length is all 70-80mm, and it is highly all 31mm; The long 3.0-4.0m of the main steel pipe of defeated slurry (6-1), the extexine at its two ends all car have connecting screw, at the external surface of its mid-length, with the circumferential distance equating, 3 defeated slurry locating pins (6-2) are set; Each defeated slurry locating pin (6-2) longitudinally parallels and is affixed with the main steel pipe of defeated slurry (6-1), all implements bilateral straight joint full weld at its place of being affixed; Enter to starch the long 2.0-2.5m of main steel pipe (7-1), the extexine car on its top has connecting screw, at the external surface apart from its tail end 600mm place, arranges 3 enter to starch locating pin (7-2) with the circumferential distance equating; It is identical with the welding manner between defeated slurry locating pin (6-2) and the main steel pipe of defeated slurry (6-1) with the welding manner that enters to starch between main steel pipe (7-1) that this enters to starch locating pin (7-2).
7. the cluster type grouting cable anchor reinforcing method of Highway Rock Slopes according to claim 1, is characterized in that: described steel strand member (8) consists of 1 steel strand (8-1) and 1 mooring anchor (8-2); Steel strand (8-1) are tailored and are formed with 1860 shaped steel twisted wires; Mooring anchor (8-2) is made of 40Cr alloy steel, and it is fixed on the top of steel strand (8-1), and it is the cylindrical of 31mm, high 60mm that its profile is a bottom surface diameter; Its length of described steel sleeve (11) is that 100mm, wall thickness are 4mm, and top layer car has connecting screw within it; Described its diameter of colligation galvanized wire (10) is 2mm.
8. the cluster type grouting cable anchor reinforcing method of Highway Rock Slopes according to claim 1, it is characterized in that: the pallet fitting together (3), chassis (2), diagonal brace (4), Grout-jetting pipe (5) and steel strand member (8) are inserted in described anchor hole (1), and the tail end of Grout-jetting pipe (5) is stayed outside the new aperture of anchor hole (1); The steel sleeve (11) of screwing on described in one at the tail end of this Grout-jetting pipe (5); Get the feed pipe for mortar (6) described in a joint, within its top being screwed into the other end of this steel sleeve (11); Outside in connected feed pipe for mortar (6) is 6 steel strand (8-1) that the circumferential distance that equates distributes; Along these steel strand (8-1), every 800-1000mm, the colligation galvanized wire (10) described in 3-4 circle is all set, these steel strand (8-1) are fixed together be connected feed pipe for mortar (6) with Grout-jetting pipe (5); Promote the feed pipe for mortar (6) connecting, its main body is entered in anchor hole (1), and its tail end is stayed outside the new aperture of anchor hole (1); At the tail end of this feed pipe for mortar (6) steel sleeve (11) of screwing on, connect in turn according to the method described above and to pushing remaining feed pipe for mortar (6) and the inlet pipe (7) of respectively saving in anchor hole (1).
9. the cluster type grouting cable anchor reinforcing method of Highway Rock Slopes according to claim 1, is characterized in that: at the described tail end that enters to starch main steel pipe (7-1), connect rubber tube, utilize pneumatic mortar machine to the interior slip casting of anchor hole (1); At the bottom of the hole of described non-shrinkage cement mortar (12) by the through anchor hole (1) of inlet pipe (7), feed pipe for mortar (6) and Grout-jetting pipe (5), then from past return between this Grout-jetting pipe (5), feed pipe for mortar (6) and inlet pipe (7) and the hole wall of anchor hole (1), until overflow from the new aperture of anchor hole (1).
10. the cluster type grouting cable anchor reinforcing method of Highway Rock Slopes according to claim 1, it is characterized in that: the non-shrinkage cement mortar (12) in described anchor hole (1) reaches after final set, the described afterbody that enters to starch main steel pipe (7-1) is cut, make the new aperture 200mm of recessed this anchor hole (1) of its new tail end; Remove the non-shrinkage cement mortar (12) in the new aperture of this anchor hole (1), recover new aperture with the dark vestibule of interior 200mm; In the slope rock mass (13) around of its new aperture of this anchor hole (1), squeeze into four expansion bolts, fix the anchor device pedestal (15) described in; Between this anchor device pedestal (15) and slope rock mass (13), dry cement mortar in filling; This anchor device pedestal (15) is made of the steel plate of 280 * 280 * 20mm, at the position, center of its plane, is provided with the circular hole that a diameter is 84mm, and 6 steel strand (8-1) of described cluster type anchor cable pass from this circular hole.
The cluster type grouting cable anchor reinforcing method of 11. Highway Rock Slopes according to claim 1, is characterized in that: described ground tackle (14) is affixed with the lateral surface of anchor device pedestal (15); Non-shrinkage cement mortar (12) in described anchor hole (1) reaches after design strength, 6 steel strand (8-1) to the cluster type anchor cable in this anchor hole (1) carry out stretch-draw, and with this ground tackle (14), it is locked, stretching force used is 500-700kN; Injected hole by this ground tackle (14) is to the interior injected water mud of anchor hole (1), to fill up all holes in anchor hole (1).
The cluster type grouting cable anchor reinforcing method of 12. Highway Rock Slopes according to claim 1, is characterized in that: its distributing bar of described lattice girder (16) (18) consists of main muscle (18-1) and stirrup (18-2); The indented bars that main muscle (18-1) is 12mm with diameter is made, and in end face, the He Liangge side, bottom surface of distributing bar (18), this main muscle (18-1) all be take 100mm as spacing setting; Stirrup (18-2) bends and forms with the plain bar that diameter is 8mm, along main muscle (18-1) longitudinally, it take 150mm as spacing setting; The indented bars that described anchor pole (19) is 20mm with diameter is made; Along described box cut (17), two row's anchor poles (19) are squeezed in slope rock mass (13), its every row be take 400mm as spacing setting, and this two row's anchor pole (19) lays respectively at the inner side of the main muscle in its both sides of distributing bar (18) (18-1); Intersection at each anchor pole (19) with main muscle (18-1), all implements bilateral welding; The top of all anchor poles (19) all maintains an equal level mutually with the end face of distributing bar (18), and the degree of depth that they are driven into slope rock mass (13) is 600-1500mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102926303A (en) * | 2012-11-22 | 2013-02-13 | 河海大学 | Method for reinforcing soft soil foundation settlement control pile foundation bracket of high-grade highway in use |
| CN104153377B (en) * | 2014-08-06 | 2016-03-30 | 中钢集团马鞍山矿山研究院有限公司 | Pier beam integrative-structure add densely covered muscle method |
| CN104863162B (en) * | 2015-06-11 | 2017-03-22 | 西安科技大学 | Foundation pit support system applied to expansive soil regions and construction method thereof |
| CN109281325A (en) * | 2018-11-01 | 2019-01-29 | 重庆市地质矿产勘查开发局208水文地质工程地质队（重庆市地质灾害防治工程勘查设计院） | Slope inclined insertion plate type green protection system and construction method |
| CN110512626B (en) * | 2019-08-23 | 2021-04-06 | 郑州大学 | Setting method of slurry permeation grouting holes for slope rock mass reinforcement |
| CN111576450A (en) * | 2020-05-18 | 2020-08-25 | 中铁二十局集团第三工程有限公司 | Slope reinforcing method |
| CN112921727B (en) * | 2021-01-28 | 2022-07-19 | 攀钢集团工程技术有限公司 | High and steep slope road widening construction method |
| CN114482093A (en) * | 2022-03-11 | 2022-05-13 | 深圳市山月园园艺有限公司 | Prestressed grid anchoring device for slope treatment |
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| CN2236019Y (en) * | 1994-11-04 | 1996-09-25 | 中国矿业大学 | Mud injecting anchor rod for high-water-contained quick-condensing material |
| CN101358451A (en) * | 2007-08-02 | 2009-02-04 | 陶仲 | Construction method and apparatus with steel strand built-in |
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| CN201610547U (en) * | 2010-03-03 | 2010-10-20 | 杨宏量 | Annular anchor stock for repairing highway bridge abutment side wall cracks |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5028323B2 (en) * | 2008-04-18 | 2012-09-19 | 雅志 佐々木 | Ground anchor method |
| KR101016047B1 (en) * | 2009-12-14 | 2011-02-23 | 광성지엠(주) | Apparatus for reinforcing anchor and construction method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2236019Y (en) * | 1994-11-04 | 1996-09-25 | 中国矿业大学 | Mud injecting anchor rod for high-water-contained quick-condensing material |
| CN101358451A (en) * | 2007-08-02 | 2009-02-04 | 陶仲 | Construction method and apparatus with steel strand built-in |
| CN201507319U (en) * | 2009-09-15 | 2010-06-16 | 王明远 | Safe grouting anchor rod for anchoring and grouting |
| CN201610547U (en) * | 2010-03-03 | 2010-10-20 | 杨宏量 | Annular anchor stock for repairing highway bridge abutment side wall cracks |
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