CN102182197A - 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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- CN102182197A CN102182197A CN2011100748292A CN201110074829A CN102182197A CN 102182197 A CN102182197 A CN 102182197A CN 2011100748292 A CN2011100748292 A CN 2011100748292A CN 201110074829 A CN201110074829 A CN 201110074829A CN 102182197 A CN102182197 A CN 102182197A
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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 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 slope.
Background technology
In the engineering of excavation highway rock slope, all be to use anchor cable to reinforce in the past.The long 20-50m of this anchor cable is made up of many steel strand, on the top of every steel strand a mooring anchor is arranged all.Anchor hole is made with hidden hole drilling, and anchor hole is tilted to down to be squeezed in the slope rock mass, and its bore is 120-130mm.After all steel strand all are inserted into 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 the hole.
Because the length of anchor hole is excessive, at the bottom of making cement mortar can successfully flow to the hole, bigger numerical value is often adopted at the bore of anchor hole and inclination angle.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 effective use length of anchor cable again.The hole in case collapse, the native stone of slump stops the inflow of cement mortar, causes to occur the empty section of annotating in the anchor hole.
In anchor hole, the several steel strand that loaded 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 be subjected to stopping of many steel strand in the way, so can't guarantee grouting quality, more can't check anchoring effect.When the stretch-draw steel strand, the relatively 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 can't guarantee, so the strengthening quality of highway rock slope also can obviously reduce.
The present invention is exactly at these problems, by a kind of cluster type grouting cable anchor reinforcing method of the meticulous development of the inventor.Adopt the present invention to reinforce the highway rock slope, method of operating is easy, and the speed of construction is fast, the quality height of construction.
Summary of the invention
Problem to be solved by this invention will provide a kind of construction technology simple exactly, can make the highway rock slope of being excavated obtain good job practices of reinforcing.
The objective of the invention is to be achieved through the following technical solutions:
A kind of cluster type grouting cable anchor reinforcing method of highway rock slope will carry out successively by following operational sequence: bore the system anchor hole in the slope rock mass of highway rock slope; Horizontal line and vertical line along the anchor hole aperture are established box cut on the top layer of slope rock mass; In the workshop, make the steel member of cluster type anchor cable; Assemble at the construction field (site) and filling cluster type anchor cable in anchor hole; Force feed non-shrinkage cement mortar in anchor hole; The ground tackle pedestal is installed at place, aperture at anchor hole; The steel strand of stretch-draw cluster type anchor cable also are locked with ground tackle; The distributing bar of lattice girder is installed in box cut; With C25 concreting lattice girder; The cluster type grouting cable anchor reinforcing method of this highway rock slope is characterised in that:
On the highway rock slope, all anchor holes all are tilted to down according to same angle and squeeze in the 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 laterally all arranging with the spacing that equates with vertical, and concrete numerical value is between 2500-3500mm; The width of described box cut is 400mm, and the degree of depth is 300mm, and on the top layer of highway rock slope, this box cut distributes as net shape, and at each node place of this grid, the aperture of an anchor hole is arranged all; The width of the distributing bar of described lattice girder is 330mm, highly be 430mm, it is dark that it is embedded in the described box cut 270mm, and fix by the anchor pole and the slope rock mass of colony, top layer in the highway rock slope, this distributing bar distributes as net shape, and at each node place of this grid, all is wrapped in the ground tackle of a described cluster type anchor cable and stretches out the steel strand of this ground tackle; The C25 concrete pouring of described lattice girder, its width is 400mm, highly be 500mm, it is dark that it is embedded in the described box cut 300mm, top layer in the highway rock slope, this lattice girder distributes as net shape, and at each node place of this grid, is all sealing the ground tackle of a described cluster type anchor cable and is stretching out the steel strand of this ground tackle; The axis of described cluster type anchor cable and the axis of anchor hole coincide; Described non-shrinkage cement mortar is full of the whole spaces in this anchor hole; In described anchor hole, at the bottom of the hole, be followed successively by 1 pallet of this cluster type anchor cable, 1 chassis, 3 diagonal braces, 1 joint Grout-jetting pipe, number joint and even ten number joint feed pipe for mortar and 1 joint inlet pipe to the aperture; Described pallet is positioned at the top of whole cluster type anchor cable, contacts at the bottom of the hole of its pallet exposed face and anchor hole; The main body of described inlet pipe is positioned at anchor hole, and its tail end that advances to starch main steel pipe stretches out the aperture 300mm of this anchor hole, and it advances to starch the aperture 300mm of recessed this anchor hole of locating pin; In 6 pairs of holddown grooves that described pallet and chassis are constituted, build-in the mooring anchor of 6 steel strand members respectively; The steel strand of these 6 steel strand members pass 6 steel strand holes on described chassis respectively, and are distributed in the outside of described Grout-jetting pipe, feed pipe for mortar and inlet pipe with the circumferential distance that equates, its tail end all stretches out the aperture 600mm of described anchor hole; Described pallet is in the same place by the bolt of a fastening nut with the chassis; Described chassis, diagonal brace and Grout-jetting pipe are in the same place by welding assembly; Between described Grout-jetting pipe and feed pipe for mortar, between two adjacent joint feed pipe for mortar, and between feed pipe for mortar and inlet pipe, a steel sleeve that all passes through to be screwed into is connected; Utilize the colligation galvanized wire that described steel strand and Grout-jetting pipe, feed pipe for mortar and inlet pipe are bundled; Described chassis is provided with 1 chassis and embeds face, 1 chassis exposed face, 6 chassis holddown grooves, 1 chassis bolt hole and 6 steel strand holes; Described pallet is provided with 1 pallet and embeds face, 1 pallet exposed face, 6 pallet holddown grooves and 1 pallet bolt hole.
Described pallet is that 105mm, thickness are the steel cylinder making of 40mm with a bottom surface diameter, and the cylindrical bottom surface of this steel is that pallet embeds face, and another bottom surface is the pallet exposed face; Bore pallet bolt hole that diameter is 12.5mm of system along the cylindrical axis of this steel, its length is 40mm; Embed towards the lining from described pallet, bore 6 columniform pallet holddown grooves of system along perpendicular direction; With equidistant distribution, its bottom surface diameter is 32mm to these pallet holddown grooves along hoop, and the degree of depth is 25mm, and their axis to the axis of described pallet bolt hole is all 33mm.
Described chassis also is to be that 105mm, thickness are that the steel cylinder of 40mm is made with a bottom surface diameter, and its chassis embeds the identical of the making and settlement of face, chassis exposed face, chassis holddown groove and chassis bolt hole and described pallet; Steel strand hole that diameter is 16mm of system is all bored at the position, center of each holddown groove bottom surface, chassis on this chassis, and the length in these steel strand holes is all 15mm, and perpendicular with described chassis embedding face.
Described Grout-jetting pipe external diameter is that 48mm, wall thickness are the weld seam steel pipe manufacturing of 4mm, and its length is 1000mm, at the extexine car of this Grout-jetting pipe tail end connecting screw is arranged; The plain bar that described diagonal brace diameter is 10mm is tailored and is formed, and its length is 150mm; Described chassis and Grout-jetting pipe are perpendicular, and the top of its chassis exposed face and this Grout-jetting pipe is at a distance of 100mm, and the axis of its chassis bolt hole and the axis of this Grout-jetting pipe coincide; The outside at this root Grout-jetting pipe top makes 3 described diagonal braces with the circumferential distance that equates; One end of these 3 diagonal braces all welds mutually with described Grout-jetting pipe, and the other end all welds mutually with the limit portion of described chassis exposed face, and the length of all weld bonds all is not less than 25mm.
Described feed pipe for mortar is made of 1 defeated main steel pipe of slurry and 1 group of defeated slurry locating pin; Described inlet pipe advances to starch main steel pipe and 1 group by 1 and advances to starch locating pin and constitute; Should defeated main steel pipe of slurry and to advance to starch main steel pipe all be to be that 48mm, wall thickness are that the weld seam steel pipe of 4mm is tailored and formed with external diameter; The long 3.0-4.0m of the main steel pipe of described defeated slurry, the extexine at its two ends all car connecting screw is arranged, welding 1 group of defeated slurry locating pin at the external surface of its mid-length; Describedly advance to starch the long 2.0-2.5m of main steel pipe, the extexine car on its top has connecting screw, is welding 1 group at the external surface apart from its tail end 600mm place and is advancing to starch locating pin; Described defeated slurry locating pin and to advance to starch locating pin identical, at the external surface of their pairing main steel pipes, its welding manner is also identical; Described defeated slurry locating pin is tailored with the thick steel plate of 10mm and is formed, and its length is 70-80mm, and it highly is 31mm; Along the hoop of the main steel pipe of described defeated slurry, every group 3 defeated slurry locating pins are with equidistant distribution, its each defeated slurry locating pin all with vertically the paralleling and pasting mutually with it of the main steel pipe of this defeated slurry, its mutually subsides place all implement bilateral straight joint full weld.
Described steel strand member is made up of 1 steel strand and 1 mooring anchor, and the degree of depth that its length equals described anchor hole adds 585mm; Described steel strand are tailored with 1860 shaped steel twisted wires and are formed; Described mooring anchor is made with the 40Cr alloy steel, and it is fixed in the top of these steel strand, and its profile is a cylinder that the bottom surface diameter is 31mm, high 60mm; The length of described steel sleeve is that 100mm, wall thickness are 4mm, and the top layer car has connecting screw within it; The diameter of described colligation galvanized wire is 2mm.
At the top of described cluster type anchor cable, make before and after pallet and the chassis; Its pallet embeds that face parallels with chassis embedding face and 10mm apart; Its 6 pallet holddown grooves and 6 chassis holddown grooves are symmetrical, form 6 pairs of holddown grooves; The mooring anchor of 6 described steel strand members embeds respectively in these 6 pairs of holddown grooves; The long 120mm of described bolt, its diameter are 12mm, and it passes described pallet bolt hole and chassis bolt hole, tighten the nut of this bolt, described pallet and chassis are fixed together, and the mooring anchor of 6 described steel strand members is constrained in together; The steel strand of 6 described steel strand members pass from 6 steel strand holes on this chassis respectively, are distributed in the outside of described Grout-jetting pipe with the circumferential distance that equates.
On the top layer of highway rock slope, establish box cut respectively along the horizontal line and the vertical line in described anchor hole aperture; This excavation groove width 400mm, dark 300mm, the facade of its both sides and highway rock slope are perpendicular, this facade forms with the cutting of electronic cutting blade, these two facades rock then with electronic shovel piecemeal rejecting; At the center position of each horizontal box cut with vertical box cut intersection, the aperture of described anchor hole all is recessed into highway rock slope surface 300mm.
The described pallet, chassis, diagonal brace, Grout-jetting pipe and the steel strand member that fit together are inserted in the described anchor hole, and the tail end of Grout-jetting pipe is stayed outside the aperture of anchor hole; Tail end at this Grout-jetting pipe is screwed into a described steel sleeve; Get the described feed pipe for mortar of a joint, its top is screwed in the steel sleeve of this Grout-jetting pipe tail end; In the outside of the feed pipe for mortar that is connected, be 6 steel strand that distribute with the circumferential distance that equates; All make the described colligation galvanized wire of 3-4 circle along these steel strand every 800-1000mm, these steel strand are fixed together with the feed pipe for mortar that is connected with Grout-jetting pipe; The feed pipe for mortar that promotion is connected enters in the anchor hole its main body, and its tail end is stayed outside the aperture of anchor hole; Tail end at this feed pipe for mortar is screwed into a described steel sleeve, connects in turn according to the method described above and push remaining feed pipe for mortar and the inlet pipe of respectively saving in anchor hole.
The main body of described inlet pipe is positioned at anchor hole, and it advances to starch the aperture 300mm of recessed this anchor hole of locating pin, and its tail end that advances to starch main steel pipe stretches out the aperture 300mm of this anchor hole; Connect rubber tube at the described tail end that advances to starch main steel pipe, utilize pneumatic mortar machine 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, from past return between the hole wall of this Grout-jetting pipe, feed pipe for mortar and inlet pipe and anchor hole, overflow then until aperture from anchor hole.
After the non-shrinkage cement mortar in the described anchor hole reaches final set, the described afterbody that advances to starch main steel pipe is cut, make the aperture 200mm of recessed this anchor hole of tail end of its new formation; Remove the non-shrinkage cement mortar in this anchor hole aperture, recover the aperture with the dark vestibule of interior 200mm; Place, aperture at this anchor hole squeezes into four expansion bolts in described slope rock mass, fix a described ground tackle pedestal; Between this ground tackle pedestal and slope rock mass, the dry cement mortar in filling; This ground tackle pedestal is made of the steel plate of 280 * 280 * 20mm, and it is the circular hole of 84mm that a diameter is arranged at the position, center on its plane, and 6 steel strand of the cluster type anchor cable in the described anchor hole pass from this circular hole.
Described ground tackle pastes mutually with the lateral surface of ground tackle pedestal, after the non-shrinkage cement mortar in the described anchor hole reaches design strength, 6 steel strand to the cluster type anchor cable in this anchor hole carry out stretch-draw, and with this ground tackle it are locked, and used stretching force is 500-700kN; Injected hole by this ground tackle injects cement paste in anchor hole, to fill up holes all in the anchor hole.
The wide 330mm of the distributing bar of described lattice girder, high 430mm, it is made of main muscle and stirrup; The indented bars that main muscle diameter is 12mm is made, and in end face, bottom surface and two sides of described distributing bar, this main muscle all is that spacing makes with 100mm; The stirrup diameter is that the plain bar of 8mm bends and forms, along described main muscle vertically, it is that spacing makes with 150mm; Along described box cut, the described anchor pole of two rows is squeezed in the slope rock mass, its every row is that spacing makes with 400mm; This two rows anchor pole lays respectively at the inboard of described distributing bar both sides master's muscle, in the intersection of each anchor pole and main muscle, all implements the bilateral welding; The indented bars that described anchor pole diameter is 20mm is made, and it is dark that it is anchored into slope rock mass 600-1500mm, and its top maintains an equal level mutually with the end face of described distributing bar.
Advantage of the present invention is: employed cluster type anchor cable is a combining structure, and its steel member all can carry out standardized production in the workshop, except that steel strand, and its maximum shortage in weight 20kg that decomposes.Under the narrow on construction ground situation, this cluster type anchor cable not only is convenient to assembling but also is easy to insert in the anchor hole.This cluster type anchor cable is provided with the defeated slurry of special anti-circulation passage, and the mooring anchor of whole steel strand is constrained in together, so the inclination angle of anchor hole can reduce as far as possible, its bore can be selected optimal values.Even under the situation in hole of collapsing, also can obtain good slip casting effect.
Description of drawings
Fig. 1 is a front schematic view of squeezing into anchor hole among the present invention in slope rock mass.
Fig. 2 is a side generalized section of squeezing into anchor hole among the present invention in slope rock mass.
Fig. 3 is the front schematic view that makes box cut among the present invention on top layer, rock hillside.
Fig. 4 is the side generalized section that makes box cut among the present invention on top layer, rock hillside.
Fig. 5 is the front schematic view of cluster type grouting cable anchor of packing in the anchor hole of slope rock mass among the present invention.
Fig. 6 is the front schematic view of at the place, aperture of each anchor hole the ground tackle pedestal being installed among the present invention.
Fig. 7 is the front schematic view that the lattice girder distributing bar is installed in box cut among the present invention.
Fig. 8 is the front schematic view of pouring into a mould lattice girder among the present invention in box cut.
Fig. 9 is the front schematic view that the chassis embeds face one side among the present invention.
Figure 10 is the front schematic view of exposed face one side in chassis among the present invention.
Figure 11 is the front schematic view that pallet embeds face one side among the present invention.
Figure 12 is the front schematic view of pallet exposed face one side among the present invention.
Figure 13 is the schematic cross-sectional view of cluster type anchor cable top steel member among the present invention.
Figure 14 is the side schematic view of cluster type anchor cable top steel member among the present invention.
Figure 15 is the schematic cross-sectional view at cluster type anchor cable feed pipe for mortar locating pin position among the present invention.
Figure 16 is the schematic cross-sectional view at cluster type anchor cable feed pipe for mortar steel sleeve position among the present invention.
Figure 17 is the schematic cross-sectional view at cluster type anchor cable feed pipe for mortar master steel pipe position among the present invention.
Figure 18 is the side schematic view of chassis among the present invention, diagonal brace and Grout-jetting pipe assembly.
Figure 19 side schematic view that to be chassis among the present invention, diagonal brace and Grout-jetting pipe assemble mutually with the steel strand member.
Figure 20 is the side schematic view of feed pipe for mortar among the present invention.
Figure 21 is the side schematic view at cluster type anchor cable feed pipe for mortar position among the present invention.
Figure 22 is the side schematic view of inlet pipe among the present invention.
Figure 23 is the side schematic view at cluster type anchor cable inlet pipe position among the present invention.
Figure 24 is the side schematic view of adjacent two joint feed pipe for mortar connecting portions among 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 among the present invention.
Figure 26 is the front schematic view that the ground tackle pedestal is located installation in position among the present invention in the aperture of anchor hole.
Figure 27 is the front schematic view that steel wire bundle is locked by ground tackle among the present invention.
Figure 28 be among 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 among the present invention.
Figure 30 be among the present invention in box cut the side generalized section of lattice girder distributing bar installation in position.
Figure 31 be among 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 ground tackle pedestals, 16 lattice girders, 17 box cuts, 18 distributing bars, the 2-1 chassis embeds face, 2-2 chassis exposed face, 2-3 chassis holddown groove, 2-4 chassis bolt hole, 2-5 steel strand hole, the 3-1 pallet embeds face, 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 of 6-2 locating pin, 7-1 advances to starch main steel pipe, 7-2 advances to starch locating pin, 8-1 steel strand, 8-2 mooring anchor, 18-1 master's muscle, 18-2 stirrup, 18-3 anchor pole.
Describe the specific implementation method of reinforcing the highway rock slope according to the present invention in detail below in conjunction with accompanying drawing 1-31.
The specific embodiment
Adopt the present invention to reinforce the highway rock slope, 1-31 carries out step by step with reference to the accompanying drawings.
Shown in accompanying drawing 1-31: in the front of highway rock slope, set up hidden hole drilling and make anchor hole 1, anchor hole 1 is tilted to down in the slope rock mass 13 of squeezing into the highway rock slope, the angle of it and horizontal plane is not less than 10 degree, its length is 20-50m, its bore is 110mm, and its aperture is along laterally all arranging with the spacing that equates with vertical, and concrete numerical value is between 2500-3500mm.
On the top layer of highway rock slope, establish box cut 17 respectively along the horizontal line and the vertical line in anchor hole 1 aperture.Box cut 17 wide 400mm, dark 300mm, the facade of its both sides and highway rock slope are perpendicular, this facade forms with the cutting of electronic cutting blade, these two facades rock then with electronic shovel piecemeal rejecting.At the center position of each horizontal box cut 17 with vertical box cut 17 intersections, the aperture of anchor hole 1 all is recessed into highway rock slope surface 300mm.
Bottom surface diameter of pallet 3 usefulness is that 105mm, thickness are the steel cylinder making of 40mm, and this steel cylinder forms with lathe car system, and its bottom surface is that pallet embeds face 3-1, and another bottom surface is pallet exposed face 3-2.Pallet is embedded face 3-1 upwards and it is the level of state, bore 1 pallet bolt hole 3-4 of system and 6 pallet holddown groove 3-3 downwards with drilling machine.Pallet bolt hole 3-4 and the cylindrical axis of this steel coincide, and its diameter is 12.5mm, and length is 40mm.With equidistant distribution, they are all 33mm to the distance of pallet bolt hole 3-4 along hoop for 6 pallet holddown groove 3-3, and its bottom surface diameter is 32mm, and the degree of depth is 25mm.
The profile on chassis 2 is identical with pallet 3, and its chassis embeds the just the same of the making and settlement of face 2-1, chassis exposed face 2-2, chassis holddown groove 2-3 and chassis bolt hole 2-4 and pallet 3.The position, center of each holddown groove 2-3 bottom surface, chassis of 2 on the chassis, steel strand hole 2-5 that is 16mm along diameter of vertical brill system of this chassis holddown groove 2-3 all, the length of this steel strand hole 2-5 is 15mm.
Grout-jetting pipe 5 usefulness external diameters are that 48mm, wall thickness are the weld seam steel pipe manufacturing of 4mm, and its length is 1000mm, at the extexine car of Grout-jetting pipe 5 tail ends connecting screw are arranged.Diagonal brace 4 usefulness diameters are that the plain bar of 10mm is tailored and formed, and its length is 150mm.Chassis 2 and Grout-jetting pipe 5 position by mould, and the top of its chassis exposed face 2-2 and this Grout-jetting pipe 5 is 100mm apart, and the axis of its chassis bolt hole 2-4 and this Grout-jetting pipe 5 coincides.The outside at these root Grout-jetting pipe 5 tops makes 3 diagonal braces 4 with the circumferential distance that equates.One end of this diagonal brace 4 welds mutually with Grout-jetting pipe 5, and the other end welds mutually with the limit portion of chassis exposed face 2-2, and the length of all weld bonds all is not less than 25mm.
Feed pipe for mortar 6 is made of 1 defeated main steel pipe 6-1 of slurry and 1 group of defeated slurry locating pin 6-2.Inlet pipe 7 advances to starch main steel pipe 7-1 and 1 group by 1 and advances to starch locating pin 7-2 and constitute.Should defeated main steel pipe 6-1 of slurry and to advance to starch main steel pipe 7-1 all be to be that 48mm, wall thickness are that the weld seam steel pipe of 4mm is tailored and formed with external diameter.The long 3.0-4.0m of the defeated main steel pipe 6-1 of slurry, the extexine at its two ends all car connecting screw is arranged, welding 1 group of defeated locating pin 6-2 that starches in the midpoint of its length.Advance to starch the long 2.0-2.5m of main steel pipe 7-1, the extexine car on its top has connecting screw, advances to starch locating pin 7-2 welding 1 group apart from the 600mm place of its tail end.
Defeated slurry locating pin 6-2 and to advance to starch locating pin 7-2 identical, at the external surface of their pairing main steel pipes, its welding manner is also identical.Defeated slurry locating pin 6-2 is tailored with the thick steel plate of 10mm and is formed, and its length is 70-80mm, and it highly is 31mm.Along the hoop of the main steel pipe 6-1 of defeated slurry, 3 defeated slurry locating pin 6-2 of every group are with equidistant distribution, its each defeated slurry locating pin 6-2 all with vertically the paralleling and pasting mutually with it of the main steel pipe 6-1 of this defeated slurry, its mutually subsides place all implement bilateral straight joint full weld.
The length of steel sleeve 11 is that 100mm, wall thickness are 4mm, and the top layer car has connecting screw within it.Between Grout-jetting pipe 5 and the feed pipe for mortar 6, between two adjacent joint feed pipe for mortar 6 and between feed pipe for mortar 6 and inlet pipe 7, a steel sleeve 11 that all passes through to be screwed into connects.Steel strand member 8 is made up of 1 steel strand 8-1 and 1 mooring anchor 8-2, and the degree of depth that its length equals anchor hole 1 adds 585mm.Steel strand 8-1 is tailored with 1860 shaped steel twisted wires and is formed, and mooring anchor 8-2 makes of the 40Cr alloy steel, and it is fixed in the top of these steel strand 8-1, and its profile is that a bottom surface diameter is that 31mm, height are the cylinder of 60mm.
At the top of cluster type anchor cable, pallet embedding face 3-1 parallels with chassis embedding face 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.Bolt 9 long 120mm, its diameter is 12mm, it passes pallet bolt hole 3-4 and chassis bolt hole 2-4, by tightening the nut of this bolt 9, pallet 3 and chassis 2 is fixed together, and the mooring anchor 8-2 of 6 steel strand members 8 is constrained in together.The steel strand 8-1 of these 6 steel strand members 8 passes from 6 steel strand hole 2-5 on this chassis 2 respectively, is distributed in the outside of Grout-jetting pipe 5, feed pipe for mortar 6 and inlet pipe 7 with the circumferential distance that equates.
The pallet 3 that fits together, chassis 2, diagonal brace 4, Grout-jetting pipe 5 and steel strand member 8 have formed the top of cluster type anchor cable.The top of this cluster type anchor cable is inserted in the anchor hole 1, and the tail end of its Grout-jetting pipe 5 is stayed outside the aperture of anchor hole 1.Tail end at this Grout-jetting pipe 5 is screwed into a steel sleeve 11, gets a joint feed pipe for mortar 6, its top is screwed in the steel sleeve 11 of these Grout-jetting pipe 5 tail ends.All make 3-4 circle colligation galvanized wire 10 along steel strand 8-1 every 800-1000mm, together with 6 steel strand 8-1 and this Grout-jetting pipe 5 and feed pipe for mortar 6 colligations that are connected.The feed pipe for mortar 6 that promotion is connected enters in the anchor hole 1 its main body, and its tail end is stayed outside the aperture of anchor hole 1.Tail end at this joint feed pipe for mortar 6 is screwed into a steel sleeve 11, connects in turn according to the method described above and push 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 advances to starch the aperture 300mm of recessed this anchor hole 1 of locating pin 7-2, its tail end that advances to starch main steel pipe 7-1 stretches out the aperture 300mm of this anchor hole 1.The axis of the axis of whole cluster type anchor cable and anchor hole 1 coincides.Connect rubber tube at the tail end that advances to starch main steel pipe 7-1, utilize pneumatic mortar machine force feed non-shrinkage cement mortar 12 in anchor hole 1.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 the hole wall of this Grout-jetting pipe 5, feed pipe for mortar 6 and inlet pipe 7 and anchor hole 1, until overflowing from the aperture of anchor hole 1.Under the situation in hole of collapsing, the native stone of slump is deposited between the hole wall and feed pipe for mortar 6 of anchor hole 1.Can strengthen the pressure of pneumatic mortar machine this moment, and non-shrinkage cement mortar 12 can be washed stopping of these slumps soil stones open, it is dissolved among self, and is full of whole spaces in the anchor hole 1 smoothly.
After the non-shrinkage cement mortar 12 in the anchor hole 1 reaches final set, the afterbody that advances to starch main steel pipe 7-1 is cut, make the aperture 200mm of recessed this anchor hole 1 of tail end of its new formation.Remove the non-shrinkage cement mortar 12 in anchor hole 1 aperture, recover the dark vestibule of 200mm in this aperture.Place, aperture at anchor hole 1 squeezes into four expansion bolts in slope rock mass 13, fix a ground tackle pedestal 15.Between this ground tackle pedestal 15 and slope rock mass 13, the dry cement mortar in filling.The steel plate of ground tackle pedestal 15 usefulness 400 * 400 * 20mm is made, and it is the circular hole of 84mm that a diameter is arranged at the position, center on its plane, and 6 steel strand 8-1 of the cluster type anchor cable in the anchor hole 1 pass from this circular hole.
The distributing bar 18 of lattice girder 16 is made of main muscle 18-1 and stirrup 18-2.The indented bars that main muscle 18-1 diameter is 12mm is made, and in end face, bottom surface and two sides of distributing bar 18, this main muscle 18-1 is that spacing makes with 100mm.Stirrup 18-2 diameter is that the plain bar of 8mm bends and forms, along main muscle 18-1 vertically, it is that spacing makes with 150mm.In slope rock mass 13, squeeze into two row's anchor pole 18-3 along box cut 17, and every row is that spacing makes with 400mm.This two rows anchor pole 18-3 lays respectively at the inboard of distributing bar 18 both sides master's muscle 18-1, in the intersection of each anchor pole 18-3 and main muscle 18-1, all implements the bilateral welding.Anchor pole 18-3 diameter is that the indented bars of 20mm is made, and it is dark that its is anchored within the 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, weld a bolt at the top of every anchor pole 18-3.The template of cast lattice girder 16 is made of the thick steel plate of 3mm, and it passes through this four rows bolt in the outside of distributing bar 18.Box cut 17 wide 400mm, its bottom surface is recessed into highway rock slope 300mm.Distributing bar 18 wide 330mm, high 430mm.After distributing bar 18 was in place in box cut 17, its end face protruded highway rock slope 160mm.The lattice girder 16 wide 400mm of castable protrude highway rock slope 200mm.
Claims (13)
1. the cluster type grouting cable anchor reinforcing method of a highway rock slope will carry out successively by following operational sequence: bore system anchor hole (1) in the slope rock mass (13) of highway rock slope; Horizontal line and vertical line along anchor hole (1) aperture are established box cut (17) on the top layer of slope rock mass (13); In the workshop, make the steel member of cluster type anchor cable; Assemble at the construction field (site) and filling cluster type anchor cable in anchor hole (1); Force feed non-shrinkage cement mortar (12) in anchor hole (1); Ground tackle pedestal (15) is installed at place, aperture at anchor hole (1); The steel strand (8-1) of stretch-draw cluster type anchor cable also are locked with ground tackle (14); The distributing bar (18) of lattice girder (16) is installed in box cut (17); With C25 concreting lattice girder (16); The cluster type grouting cable anchor reinforcing method of this highway rock slope is characterised in that:
On the highway rock slope, all anchor holes (1) all are tilted to down according to same angle and squeeze in the 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 laterally all arranging with the spacing that equates with vertical, and concrete numerical value is between 2500-3500mm; The width of described box cut (17) is 400mm, and the degree of depth is 300mm, and on the top layer of highway rock slope, this box cut (17) distributes as net shape, and at each node place of this grid, the aperture of an anchor hole (1) is arranged all; The width of the distributing bar (18) of described lattice girder (16) is 330mm, highly be 430mm, it is dark that it is embedded into the interior 270mm of described box cut (17), and the anchor pole (18-3) by colony fixes with slope rock mass (13), top layer in the highway rock slope, this distributing bar (18) distributes as net shape, and at each node place of this grid, all is wrapped in the ground tackle (14) of a described cluster type anchor cable and stretches out the steel strand (8-1) of this ground tackle (14); Described lattice girder (16) is used the C25 concrete pouring, its width is 400mm, highly be 500mm, it is dark that it is embedded into the interior 300mm of described box cut (17), top layer in the highway rock slope, this lattice girder (16) distributes as net shape, and at each node place of this grid, is all sealing the ground tackle (14) of a described cluster type anchor cable 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; Described non-shrinkage cement mortar (12) is full of the whole spaces in this anchor hole (1); In described anchor hole (1), at the bottom of the hole, be followed successively by 1 pallet (3), 1 chassis (2), 3 diagonal braces (4), 1 joint Grout-jetting pipe (5), number joint and even ten number joint feed pipe for mortar (6) and the 1 joint inlet pipe (7) of this cluster type anchor cable to the aperture; Described pallet (3) is positioned at the top of whole cluster type anchor cable, contacts at the bottom of the hole of its pallet exposed face (3-2) and anchor hole (1); The main body of described inlet pipe (7) is positioned at anchor hole (1), and its tail end that advances to starch main steel pipe (7-1) stretches out the aperture 300mm of this anchor hole (1), and it advances to starch the aperture 300mm of recessed this anchor hole (1) of locating pin (7-2); In 6 pairs of holddown grooves that described pallet (3) and chassis (2) are constituted, 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 6 steel strand holes (2-5) on described chassis (2) respectively, and being distributed in the outside of described Grout-jetting pipe (5), feed pipe for mortar (6) and inlet pipe (7) with the circumferential distance that equates, its tail end all stretches out the aperture 600mm of described anchor hole (1); Described pallet (3) and chassis (2) are fixed together by the bolt (9) of a fastening nut; Described chassis (2), diagonal brace (4) and Grout-jetting pipe (5) are by welding assembly together; Between described Grout-jetting pipe (5) and feed pipe for mortar (6), between two adjacent joint feed pipe for mortar (6), and between feed pipe for mortar (6) and inlet pipe (7), a steel sleeve (11) that all passes through to be screwed into is connected; Utilize colligation galvanized wire (10) that described steel strand (8-1) and Grout-jetting pipe (5), feed pipe for mortar (6) and inlet pipe (7) are bundled; Described chassis (2) is provided with 1 chassis and embeds face (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 and embeds face (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 slope according to claim 1, it is characterized in that: described pallet (3) is that 105mm, thickness are the steel cylinder making of 40mm with a bottom surface diameter, the cylindrical bottom surface of this steel is that pallet embeds face (3-1), and another bottom surface is pallet exposed face (3-2); Bore pallet bolt hole (3-4) that diameter is 12.5mm of system along the cylindrical axis of this steel, its length is 40mm; Embed face (3-1) inwards from described pallet, bore system 6 columniform pallet holddown grooves (3-3) along perpendicular direction; With equidistant distribution, its bottom surface diameter is 32mm to these pallet holddown grooves (3-3) along hoop, and the degree of depth is 25mm, and their axis to the axis of described pallet bolt hole (3-4) is all 33mm.
3. the cluster type grouting cable anchor reinforcing method of highway rock slope according to claim 1, it is characterized in that: described chassis (2) also are to be that 105mm, thickness are that the steel cylinder of 40mm is made with a bottom surface diameter, and its chassis embeds the identical of the making and settlement of face (2-1), chassis exposed face (2-2), chassis holddown groove (2-3) and chassis bolt hole (2-4) and described pallet (3); Steel strand hole (2-5) that diameter is 16mm of system is all bored at position, center in this chassis (2) each chassis holddown groove (2-3) bottom surface, and the length in these steel strand holes (2-5) is all 15mm, and perpendicular with described chassis embedding face (2-1).
4. the cluster type grouting cable anchor reinforcing method of highway rock slope according to claim 1, it is characterized in that: described Grout-jetting pipe (5) is that 48mm, wall thickness are the weld seam steel pipe manufacturing of 4mm with external diameter, its length is 1000mm, at the extexine car of this Grout-jetting pipe (5) tail end connecting screw is arranged; Described diagonal brace (4) is that the plain bar of 10mm is tailored and formed with diameter, and its length is 150mm; Described chassis (2) is perpendicular with Grout-jetting pipe (5), and the top of its chassis exposed face (2-2) and this Grout-jetting pipe (5) is at a distance of 100mm, and the axis of the axis of its chassis bolt hole (2-4) and this Grout-jetting pipe (5) coincides; The outside at this root Grout-jetting pipe (5) top makes 3 described diagonal braces (4) with the circumferential distance that equates; One end of these 3 diagonal braces (4) all welds mutually with described Grout-jetting pipe (5), and the other end all welds mutually with the limit portion of described chassis exposed face (2-2), and the length of all weld bonds all is not less than 25mm.
5. the cluster type grouting cable anchor reinforcing method of highway rock slope according to claim 1 is characterized in that: described feed pipe for mortar (6) is made of 1 defeated slurry main steel pipe (6-1) and 1 group of defeated slurry locating pin (6-2); Described inlet pipe (7) advances to starch main steel pipe (7-1) and 1 group by 1 and advances to starch locating pin (7-2) and constitute; Should defeated slurry main steel pipe (6-1) and to advance to starch main steel pipe (7-1) all be to be that 48mm, wall thickness are that the weld seam steel pipe of 4mm is tailored and formed with external diameter; The long 3.0-4.0m of the main steel pipe of described defeated slurry (6-1), the extexine at its two ends all car connecting screw is arranged, welding 1 group of defeated slurry locating pin (6-2) at the external surface of its mid-length; Describedly advance to starch the long 2.0-2.5m of main steel pipe (7-1), the extexine car on its top has connecting screw, is welding 1 group at the external surface apart from its tail end 600mm place and is advancing to starch locating pin (7-2); Described defeated slurry locating pin (6-2) and to advance to starch locating pin (7-2) identical, at the external surface of their pairing main steel pipes, its welding manner is also identical; Described defeated slurry locating pin (6-2) is tailored with the thick steel plate of 10mm and is formed, and its length is 70-80mm, and it highly is 31mm; Hoop along the main steel pipe of described defeated slurry (6-1), 3 defeated slurry locating pins (6-2) of every group are with equidistant distribution, its each defeated slurry locating pin (6-2) all with vertically the paralleling and pasting mutually with it of this defeated main steel pipe of slurry (6-1), its mutually subsides place all implement bilateral straight joint full weld.
6. the cluster type grouting cable anchor reinforcing method of highway rock slope according to claim 1, it is characterized in that: described steel strand member (8) is made up of 1 steel strand (8-1) and 1 mooring anchor (8-2), and the degree of depth that its length equals described anchor hole (1) adds 585mm; Described steel strand (8-1) are tailored with 1860 shaped steel twisted wires and are formed; Described mooring anchor (8-2) is made with the 40Cr alloy steel, and it is fixed in the top of these steel strand (8-1), and its profile is a cylinder that the bottom surface diameter is 31mm, high 60mm; The length of described steel sleeve (11) is that 100mm, wall thickness are 4mm, and the top layer car has connecting screw within it; The diameter of described colligation galvanized wire (10) is 2mm.
7. the cluster type grouting cable anchor reinforcing method of highway rock slope according to claim 1 is characterized in that: at the top of described cluster type anchor cable, pallet (3) makes with front and back, chassis (2); Its pallet embeds that face (3-1) and chassis embed that face (2-1) parallels and 10mm apart; Its 6 pallet holddown grooves (3-3) are symmetrical with 6 chassis holddown grooves (2-3), form 6 pairs of holddown grooves; The mooring anchor (8-2) of 6 described steel strand members (8) embeds respectively in these 6 pairs of holddown grooves; The long 120mm of described bolt (9), its diameter is 12mm, it passes described pallet bolt hole (3-4) and chassis bolt hole (2-4), tighten the nut of this bolt (9), described pallet (3) and chassis (2) are fixed together, and the mooring anchor (8-2) of 6 described steel strand members (8) is constrained in together; The steel strand (8-1) of 6 described steel strand members (8) pass from 6 steel strand holes (2-5) of this chassis (2) respectively, are distributed in the outside of described Grout-jetting pipe (5) with the circumferential distance that equates.
8. the cluster type grouting cable anchor reinforcing method of highway rock slope according to claim 1 is characterized in that: on the top layer of highway rock slope, establish box cut (17) respectively along the horizontal line and the vertical line in described anchor hole (1) aperture; The wide 400mm of this box cut (17), dark 300mm, the facade of its both sides and highway rock slope are perpendicular, this facade forms with the cutting of electronic cutting blade, these two facades rock then with electronic shovel piecemeal rejecting; At the center position of each horizontal box cut (17) with vertical box cut (17) intersection, the aperture of described anchor hole (1) all is recessed into highway rock slope surface 300mm.
9. the cluster type grouting cable anchor reinforcing method of highway rock slope according to claim 1, it is characterized in that: the described pallet (3) that will fit together, chassis (2), diagonal brace (4), Grout-jetting pipe (5) and steel strand member (8) insert in the described anchor hole (1), and the tail end of Grout-jetting pipe (5) is stayed outside the aperture of anchor hole (1); Tail end at this Grout-jetting pipe (5) is screwed into a described steel sleeve (11); Get a joint described feed pipe for mortar (6), its top is screwed in the steel sleeve (11) of this Grout-jetting pipe (5) tail end; The outside in the feed pipe for mortar that is connected (6) is 6 steel strand (8-1) that distribute with the circumferential distance that equates; All make the described colligation galvanized wire of 3-4 circle (10) along these steel strand (8-1) every 800-1000mm, these steel strand (8-1) are fixed together with the feed pipe for mortar that is connected (6) with Grout-jetting pipe (5); The feed pipe for mortar (6) that promotion is connected enters in the anchor hole (1) its main body, and its tail end is stayed outside the aperture of anchor hole (1); Tail end at this feed pipe for mortar (6) is screwed into a described steel sleeve (11), connects in turn according to the method described above and push remaining feed pipe for mortar (6) and the inlet pipe (7) of respectively saving in anchor hole (1).
10. the cluster type grouting cable anchor reinforcing method of highway rock slope according to claim 1, it is characterized in that: the main body of described inlet pipe (7) is positioned at anchor hole (1), it advances to starch the aperture 300mm of recessed this anchor hole (1) of locating pin (7-2), and its tail end that advances to starch main steel pipe (7-1) stretches out the aperture 300mm of this anchor hole (1); Connect rubber tube at the described tail end that advances to starch main steel pipe (7-1), utilize pneumatic mortar machine slip casting in 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 the hole wall of this Grout-jetting pipe (5), feed pipe for mortar (6) and inlet pipe (7) and anchor hole (1), until overflowing from the aperture of anchor hole (1).
11. the cluster type grouting cable anchor reinforcing method of highway rock slope according to claim 1, it is characterized in that: after the non-shrinkage cement mortar (12) in the described anchor hole (1) reaches final set, the described afterbody that advances to starch main steel pipe (7) is cut, make the aperture 200mm of recessed this anchor hole (1) of tail end of its new formation; Remove the non-shrinkage cement mortar (12) in this anchor hole (1) aperture, recover the aperture with the dark vestibule of interior 200mm; Place, aperture at this anchor hole (1) squeezes into four expansion bolts in described slope rock mass (13), fix a described ground tackle pedestal (15); Between this ground tackle pedestal (15) and slope rock mass (13), the dry cement mortar in filling; This ground tackle pedestal (15) is made of the steel plate of 280 * 280 * 20mm, and it is the circular hole of 84mm that a diameter is arranged at the position, center on its plane, and 6 steel strand (8-1) of described cluster type anchor cable pass from this circular hole.
12. the cluster type grouting cable anchor reinforcing method of highway rock slope according to claim 1, it is characterized in that: described ground tackle (14) pastes mutually with the lateral surface of ground tackle pedestal (15), after the non-shrinkage cement mortar (12) in the described anchor hole (1) reaches 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) to its locking, used stretching force is 500-700kN; Injected hole by this ground tackle (14) injects cement paste in anchor hole (1), to fill up all holes in the anchor hole (1).
13. the cluster type grouting cable anchor reinforcing method of highway rock slope according to claim 1 is characterized in that: the wide 330mm of distributing bar (18) of described lattice girder (16), high 430mm, it is made of main muscle (18-1) and stirrup (18-2); Main muscle (18-1) is the indented bars making of 12mm with diameter, end face, bottom surface and two sides in described distributing bar (18), and this main muscle (18-1) all is that spacing makes with 100mm; Stirrup (18-2) is that the plain bar of 8mm bends and forms with diameter, along described main muscle (18-1) vertically, it is that spacing makes with 150mm; Along described box cut (17), the two described anchor poles of row (18-3) are squeezed in the slope rock mass (13), its every row is that spacing makes with 400mm; This two row's anchor pole (18-3) lays respectively at the inboard of described distributing bar (18) both sides master's muscle (18-1), in the intersection of each anchor pole (18-3) with main muscle (18-1), all implements the bilateral welding; Described anchor pole (18-3) is the indented bars making of 20mm with diameter, and it is dark that its is anchored into slope rock mass (13) 600-1500mm, and its top maintains an equal level mutually with the end face of described distributing bar (18).
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| CN104153377A (en) * | 2014-08-06 | 2014-11-19 | 中钢集团马鞍山矿山研究院有限公司 | Rib densification distribution method of pier beam integral structure |
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| CN110512626A (en) * | 2019-08-23 | 2019-11-29 | 郑州大学 | Face slope surface rock mass reinforcing slurry penetration injected hole setting method |
| 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 |
| CN112921727A (en) * | 2021-01-28 | 2021-06-08 | 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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| CN112921727A (en) * | 2021-01-28 | 2021-06-08 | 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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