CN100526564C - Rotating anchor rod of a rod and construction method thereof - Google Patents
Rotating anchor rod of a rod and construction method thereof Download PDFInfo
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- CN100526564C CN100526564C CNB2006100619746A CN200610061974A CN100526564C CN 100526564 C CN100526564 C CN 100526564C CN B2006100619746 A CNB2006100619746 A CN B2006100619746A CN 200610061974 A CN200610061974 A CN 200610061974A CN 100526564 C CN100526564 C CN 100526564C
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Abstract
The invention relates to an anchor rod whose rod is rotational, which comprises a rotated rod inside the anchor hole; the end of rod is outside the anchor hole; the straight section is in the free section of anchor hole; the rotation section is at the anchor section. And it is characterized in that: at the rotation section, it has the support element which can deform according to the rotation of rod; said support element is combined with the slurry element poured into the anchor hole, to form the support to support the drawing force of anchor rod; and said support is at the inner side of rotation section, to be cylinder, column, ball, or U-shaped, or at the inner side of rotation section to expand the rotation section, as one flexible element, or the mesh element at the surface of rotation section, or the mesh muffle at the surface, or the annular or screw element coiled on the surface of rotation section. The invention has simple structure and easy construction, while the rod can be recycled, and it can be used as pressure anchor rod.
Description
[technical field]
The present invention relates to soil layer or geotechnics foundation and slope retaining field, be specifically related to a kind of supporting, be mainly used in engineering fields such as geotechnical engineering, foundation ditch, side slope with turning round anchor pole.
[background technology]
Anchoring in the method for processing foundation is that anchor pole one end with tension is fixed in the rock stratum or soil layer of side slope or ground, the other end and works connect, utilize anchored force to bear because soil pressure, water pressure or that wind-force was applied and thrust works, thereby keep stablizing of works.But in general, after the anchor pole mission is finished, will forever be embedded in the concrete, not only waste material, and the destruction that can cause underground environment, long anchor pole may extend in other structure foundation simultaneously, has caused inconvenience.
At present, day the present invention a kind of recoverable anchor rod, its method is after anchor hole is bored, place flexible roof bolt (as steel hinge line) in the Metallic rod tube and snap in it with snap close, a control line that does not stress is stayed in the centre, after grouting finishes, snap close is unclamped, by control line steel hinge line is pulled out then.Though this mode had been than there being bigger improvement in the past,, it only can be pulled out the flexible body of rod from anchor hole, and long sleeve pipe still is stranded in the soil layer, and have certain degree of depth, still can bring harm to underground environment.
Patent Office of the People's Republic of China discloses " a kind of line formula recoverable anchor rod of holding ", (application number: 97200768.7,) see according to disclosed technical scheme, it is that steel hinge line is located by spacer, madjack pipe places the anchor pole center, establish a cylindrical supporting body (U type deck) that through wires hole and mud jacking hole are arranged at the anchored end headgear of anchor pole, this cylindrical supporting body lower surface connects a circular loaded plate and the conical guider that through wires hole and mud jacking hole arranged respectively, steel hinge line passes through through wires hole, its end and gripping device join, grouting finish treat that slurry solidifies after, need steel hinge line to be extracted withdrawal from gripping device with jack.
Though above-mentioned prior art structure has realized the withdrawal of anchor pole, because the anchoring section steel hinge line radius of gyration is little, steel hinge line is easy to be stuck when regaining, and needs just can pull it with very large pulling capacity.And U type deck is a block structure, and relatively heavier, construction is got up also very inconvenient.
In addition, general recoverable anchor rod is owing to the characteristic of itself in the prior art, and neither is the pressure type anchor rod that can carry, thereby has limited its scope of application.
[summary of the invention]
Technical problem to be solved by this invention is, overcomes existing at present revolution anchor pole defective, provide a kind of structure design simple, save material, construction install convenience, the body of rod is recyclable and can be used as the anchor pole that turns round of pressure anchor pole uses.
Technical scheme proposed by the invention is:
A kind of body of rod revolution anchor pole, comprise that revolution is placed on the interior body of rod of anchor hole, described body of rod termination places outside the anchor hole, straightway is located at the free section of anchor hole, meander sections places the anchor hole anchoring section, the described body of rod constitutes meander sections by its middle part doubling, two terminations all place outside the anchor hole, on the described meander sections body of rod, be provided with and do distortion so that the body of rod reclaims the holder part of slippage when pulling out according to the revolution form after the body of rod doubling, this holder part the time is poured into interior the injecting cement paste of anchor hole with construction and combines, and the supporting body of axis force of anchor is born in formation.
Described holder part can be deformable column, tubular, the spherical or U-shaped shape member that is positioned over body of rod meander sections inboard; Perhaps, described holder part also can be the elastic component of being located at body of rod meander sections inboard and can driving the expansion of body of rod meander sections, or for being located at the reticular component on body of rod meander sections surface, or for resilient sleeve with holes or the sidewall that is placed in body of rod meander sections surface is netted sleeve, or circular boop shape or helical form member for being wound in body of rod meander sections surface;
Described body of rod meander sections is put the anchor hole aperture of position greater than other anchor hole apertures, position;
Described body of rod meander sections put the position the anchor hole aperture be preferably 2～10 times of other anchor hole apertures, position;
The described body of rod meander sections inboard of being located at can drive the elastic component of body of rod meander sections expansion or be strip sheet or tabular elastic component, or is the U-shaped elastic component;
The contact surface of described holder part and injecting cement paste has projection or surface to be corrugated.
Pulling force when pulling out for further reducing anchor pole, described body of rod straightway is arranged with sleeve pipe, and the holder part is arranged on the body of rod meander sections; Perhaps, be arranged with sleeve pipe in described body of rod integral body, the holder part is arranged on the body of rod meander sections sleeve pipe.
The present invention has following technique effect:
1) the present invention is provided with the holder part by callable revolution anchor pole, the injecting cement paste that holder part and grouting serous fluid are combined into has skeleton, can form the supporting body of supporting anchor pole meander sections, simultaneously, because contained holder part has certain thickness in the injecting cement paste, therefore, it combines the injecting cement paste that forms and has certain intensity with grouting serous fluid, thereby having strengthened the mechanical strength of injecting cement paste greatly, injecting cement paste can bear the pulling force of anchor pole, and anti-pulling of anchor bar is improved greatly.Like this, anchor pole both can be used as and had reclaimed body of rod use, can become pressure type anchor rod again, improved the scope of application of revolution anchor pole greatly, and because the holder part touches mutually with the inboard of revolution anchor pole, compare with anchor pole and contacting of soil layer, holder part and anchor pole frictional force between the two are much smaller, reduced the recovery pulling force of anchor pole, the recovery of the anchor pole of being more convenient for;
2) owing to the present invention enlarges the ccontaining anchor hole aperture of turning round the body of rod, flexible roof bolt back in placing anchor hole is expanded by elasticity holder part, its anchoring section has the bigger radius of gyration, greatly reduce the pulling force of anchor pole when pulling out, and phenomenon is stuck in the time of can not producing drawing, it is reliable, convenient that anchor pole reclaims, but economical with materials avoids causing underground harm;
3) the present invention's sheathed sleeve pipe on anchor pole as required, frictional force is littler when making the anchor pole drawing, and is more convenient;
4) the present invention also is corrugated by projection or the surface that is provided with on holder part and the injecting cement paste contact surface, can make the holder part more tight with combining of injecting cement paste, has reduced frictional force between the two, has further improved the bond stress of injecting cement paste and the extraction-resistant behavior of anchor pole;
5) structure of the present invention is simple compared to prior art, the system anchor, the construction also very convenient, cost of production is low, can extensively promote the use of.
[description of drawings]
Fig. 1 is the embodiment of the invention one structural representation;
Fig. 2 is the embodiment of the invention two structural representations;
Fig. 3 is the embodiment of the invention three structural representations;
Fig. 4 is the embodiment of the invention four structural representations;
Fig. 5 is the embodiment of the invention five structural representations;
Fig. 6 is the embodiment of the invention six structural representations;
Fig. 7 is the embodiment of the invention seven structural representations.
Among the figure:
The 1-anchor rod body; The 11-anchoring section; The free section of 12-;
The 2-fixture; The 3-anchor hole; 4-holds in the palm part;
41-strip elastic component; The 42-reticular component; The 43-sleeve;
The 44-spiral component; The netted cylindrical member of 45-; The 5-injecting cement paste;
The 6-short sleeve; The long sleeve pipe of 7-.
[specific embodiment]
At present, in the base pit engineering of high-rise building, underground railway, dock, harbour, underground construction, be extensive use of bolt support.But because stratum inner tissue complex structure, the infiltration of water and other media is easy to cause the corrosion to anchor pole, thus the application life that can reduce anchor pole, and simultaneously, the frictional resistance between shank member and the stratum also is the deciding factor of decision anchor pole functional performance.Therefore, how effectively to improve anti-pulling of anchor bar and anchor rod body anticorrosion problem, to provide anchor pole permanent supporting, be the major subjects of those skilled in the art's research always.In addition, the recovery of anchor pole also is building field one a big research topic, and after anchor pole used expiration, the body of rod can't reclaim, and residues in the stratum, can bring influence to the stratum, also causes the waste of material simultaneously.And in the bolt support field, because the limitation of its structure design, the pressure anchor pole generally can not use as reclaiming anchor pole at present.
The problems referred to above and the defective that the present invention is directed in the practical application to be occurred, on can rotating anchor rod body meander sections, be provided with identical with body of rod rotary bending degree, and can turn round the holder part that form is done distortion according to the body of rod, this holder part when construction can with the cement paste that is poured in the anchor hole, mortar, settable slurries such as sandstone cement mixing slurry or chemical grout or its mixture combine and form the injecting cement paste that contains skeleton, can bear axis force of anchor, promptly can be used as pressure type anchor rod uses, should ask part little simultaneously, realize the recovery of anchor pole with respect to the frictional force between stratum and the revolution anchor pole.
Recovery for ease of the revolution anchor pole, body of rod meander sections of the present invention is put the position and is adopted reaming to handle, be that anchor rod anchored sector hole footpath is greater than other anchor hole apertures, position, be generally about its 2～10 times, the revolution body of rod is after placing anchor hole the time like this, and its bottom rotary position can obtain bigger turning radius, is stuck when avoiding reclaiming, greatly reduce the pulling force of anchor pole when being drawn out, thereby realized the present invention's purpose.
The present invention will be further described below in conjunction with embodiment.
Embodiment one:
As shown in Figure 1, the present invention is placed on the flexible roof bolt body of rod 1 in the anchor hole by revolution, being poured into the injecting cement paste 5 and the rock bolt head fixture 2 that are bonded in after anchor hole 3 interior slurries solidify on the anchor rod body constitutes, wherein but anchor rod body 1 is by the steel hinge line of rotary bending, wire rope, steel tendon or engineering plastics constitute, place in the anchor hole 3, anchor hole 3 is divided into anchoring section 11 and free section 12, wherein anchor rod body 1 straightway places in the free section 12, meander sections places in the anchor hole anchoring section 11, the termination places outside the anchor hole 3, control when being convenient to reclaim, it is characterized in that: on described anchor rod body 1 meander sections, be provided with holder part 4, this holder part 4 can be done distortion according to anchor rod body 1 revolution form, has identical curvature with anchor rod body 1 meander sections.As shown in the figure, holder part 4 of the present invention adopts and can drive the elastic component that body of rod meander sections is done flexural deformation, described elastic component can be strip elastic component 41, or be the U-shaped elastic component, the present embodiment elastic component is a strip elastic component 41, be arranged at anchor rod body 1 meander sections inboard, available iron silk braid bundle method is fixed.When the revolution anchor pole places in the anchor hole 3, this strip elastic component 41 both can combine with the slurry in when grouting, induration after the slip casting is formed to have the supporting body of skeleton, slurries solidify back formation and contain the injecting cement paste 5 that holds in the palm part 4, improved the intensity of injecting cement paste 5, and can be used as supporting body and bear axis force of anchor, increase the uplift resistance of anchor pole.Simultaneously because this strip elastic component 41 is a smooth member, and place anchor rod body 1 meander sections inboard, touch mutually with anchor rod body 1 inboard, soil layer or rock stratum relatively, its with anchor rod body 1 between frictional force, reduction greatly.Therefore, when needs are pulled out anchor pole, only need catch hold of a termination that places the outer body of rod of anchor hole 3, anchor rod body 1 just is easy to be drawn out, and has realized the recovery of anchor pole.
Why holder part 4 of the present invention adopts elastic component, it is when anchor rod body 1 meander sections places in the expanded hole of anchor hole, because it is less that anchor rod body 1 enters 12 o'clock apertures of the free section of anchor hole, anchor pole meander sections curvature is also very little, and when entering to anchor hole anchoring section 11, because its aperture is extended, therefore, under the elastic reaction of strip elastic component 41, just can make anchor rod body 1 meander sections make resilient expansion according to the tolerant space of the expanded hole of anchor hole anchoring section 11, body of rod radius of curvature is extended, makes that the body of rod is easier to be drawn out.
The concrete job practices of present embodiment structural anchor bar is:
1) boring: on soil layer or rock, get out anchor hole 3 with rig according to designing requirement;
2) reaming: anchor hole 3 bottoms are enlarged, and the anchor hole aperture that makes anchor hole 3 bottom body of rod meander sections put the position increases, and is 10 times of other anchor hole apertures, position;
3) system anchor: after pressing the above intercepting of the twice body of rod of rock-bolt length or unit rock-bolt length, strip elastic component 41 is placed inboard, anchor rod body 1 middle meander sections position, tie with iron wire or plastics silk then; To contain the body of rod middle part doubling of strip elastic component 41 again, the doubling position is anchor rod body 1 meander sections, and strip elastic component 41 is together crooked with body of rod meander sections.In addition, also can be, and then strip elastic component 41 done distortion according to the revolution form of anchor rod body 1 with anchor rod body 1 doubling revolution, and place anchor rod body 1 meander sections inboard and be fixed on the anchor rod body 1;
4) grouting: the anchor rod body 1 that will contain above-mentioned strip elastic component 41 is inserted in the anchor hole 3, make in the anchor hole 3 after anchor rod body 1 meander sections places reaming, two ends places outside the anchor hole 3, casting cement slurry, mortar, sandstone cement mixing are starched or chemical grout in anchor hole 3 then, need allocate parameters such as suitable concentration of slurry and gravel size proportioning during slip casting, so that slurry fully permeates, and fill up all spaces in the anchor hole 3, treat to form after it solidifies an injecting cement paste 5 that has a strip sheet skeleton, be surrounded on around the anchor rod body.
Embodiment two:
As shown in Figure 2, present embodiment anchor rod body 1, injecting cement paste 5 and rock bolt head fixture 2 are identical with embodiment one, different is: described holder part 4 can be the reticular component 42 that coats anchor rod body 1 meander sections surface, as shown in the figure, this reticular component 42 can be flexible, flexible net sheet, the net sheet can be that wire constitutes, also can constitute by other materials, can also be for having certain thickness solid, resilient net form member, can be when the net sheet is thin by sheet multilayer parcel form, also can be the net sheet repeats to be entwined, make it be attached to surface outside anchor rod body 1 meander sections by iron wire bundle hoop or other fastening means, and turn round form according to anchor rod body 1 and do distortion, the mesh aperture on it can hold slurries and fully pass through, infiltration.When the revolution anchor pole places in the anchor hole 3, this reticular component 42 both can combine with the slurry in when grouting, and the induration after the slip casting is formed to have the supporting body of mesh skeleton, had improved the intensity of injecting cement paste 5, and can be used as supporting body and bear axis force of anchor, increase the uplift resistance of anchor pole.Also owing to be affixed on the relative soil layer of reticular component 42 frictional force or the rock stratum of anchor pole meander sections inboard, reduced much simultaneously, therefore, when pulling at anchor hole 3 external end heads, anchor rod body 1 is easy to be drawn out, and has realized the recovery of anchor pole.
Present embodiment reticular component 42 has bigger elasticity equally, when entering to the anchor hole of expansion, it just can drive anchor rod body 1 meander sections and make resilient expansion under elastic reaction according to the tolerant space of the expanded hole of anchor hole anchoring section 11, radius of curvature enlarges, and makes that the body of rod is easier to be drawn out.
The concrete job practices of present embodiment structural anchor bar is:
1) boring: on soil layer or rock, get out anchor hole 3 with rig according to designing requirement;
2) reaming: anchor hole 3 bottoms are enlarged, and the anchor hole aperture that makes anchor hole 3 bottom body of rod meander sections put the position increases, and can be 6 times of other anchor hole apertures, position;
3) system anchor: press the above intercepting of the twice body of rod of rock-bolt length or unit rock-bolt length, then reticular component 42 is placed anchor rod body 1 middle meander sections position, tie with iron wire or plastics silk; To contain the body of rod middle part doubling of reticular component 42 again, the doubling position is anchor rod body 1 meander sections, and reticular component 42 is together crooked with body of rod meander sections.In addition, also can be, and then reticular component 42 done distortion according to the revolution form of anchor rod body 1 with anchor rod body 1 doubling revolution, and place anchor rod body 1 meander sections inboard and be fixed on the anchor rod body 1;
4) grouting: the anchor rod body 1 that will contain above-mentioned reticular component 42 is inserted in the anchor hole 3, make in the anchor hole 3 after anchor rod body 1 meander sections places reaming, two ends places outside the anchor hole 3, casting cement slurry, mortar, sandstone cement mixing are starched or chemical grout in anchor hole 3 then, need allocate parameters such as suitable concentration of slurry and gravel size proportioning during slip casting, so that slurry fully permeates, and fill up all spaces in the anchor hole 3, treat to form after it solidifies an injecting cement paste 5 that has a mesh skeleton, be surrounded on around the anchor rod body.
Embodiment three:
As shown in Figure 3, present embodiment anchor rod body 1, injecting cement paste 5 and rock bolt head fixture 2 are identical with embodiment one, two, different is: described holder part 4 is for being placed in the sleeve 43 on body of rod meander sections surface, as shown in the figure, this sleeve 43 can be resilient sleeve with holes or sleeve lateral wall is a net structure, prick hoop or other fastening means make it be attached to surface outside anchor rod body 1 meander sections by iron wire, and do distortion according to anchor rod body 1 revolution form, aperture can hold slurries and fully passes through, permeates on it.When the revolution anchor pole places in the anchor hole 3, this sleeve 43 both can combine with the slurry in when grouting, and the induration after the slip casting is formed to have the supporting body of sleeve skeleton, had improved the intensity of injecting cement paste 5, and can be used as supporting body and bear axis force of anchor, increase the uplift resistance of anchor pole.Owing to fit in the sleeve relative soil layer of 43 inwall frictional force or the rock stratum of side within the anchor pole meander sections, reduce greatly simultaneously, therefore, when pulling at anchor hole 3 external end heads, anchor rod body 1 is easy to be drawn out, and has realized the recovery of anchor pole.
The sleeve 43 of present embodiment has bigger elasticity equally, when entering to the anchor hole of expansion, it is under elastic reaction, just can drive anchor rod body 1 meander sections according to the tolerant space of the expanded hole of anchor hole anchoring section 11 makes elasticity and enlarges, stretches, to reduce the degree of crook of anchor pole meander sections, after grouting casting solidification program is finished, it is pulled out anchor pole easilier.
The concrete job practices of present embodiment structural anchor bar is:
1) boring: on soil layer or rock, get out anchor hole 3 sizes with rig according to designing requirement;
2) reaming: anchor hole 3 bottoms are enlarged, and the anchor hole aperture that makes anchor hole 3 bottom body of rod meander sections put the position increases, and can be 3 times of other anchor hole apertures, position;
3) system anchor: press the above intercepting of the twice body of rod of rock-bolt length or unit rock-bolt length, then sleeve 43 is placed anchor rod body 1 middle meander sections position, prick with iron wire and bind round; To contain the body of rod middle part doubling of sleeve 43 again, the doubling position is anchor rod body 1 meander sections, makes sleeve 43 together crooked with body of rod meander sections;
4) grouting: the anchor rod body 1 that will contain above-mentioned sleeve 43 is inserted in the anchor hole 3, make in the anchor hole 3 after anchor rod body 1 meander sections places reaming, two ends places outside the anchor hole 3, casting cement slurry, mortar, sandstone cement mixing are starched or chemical grout in anchor hole 3 then, need allocate parameters such as suitable concentration of slurry and gravel size proportioning during slip casting, so that slurry fully permeates, and fill up all spaces in the anchor hole 3, treat to form after it solidifies an injecting cement paste 5 that has a sleeve skeleton, be surrounded on around the anchor rod body.
Embodiment four:
As shown in Figure 4, present embodiment anchor rod body 1, injecting cement paste 5 and rock bolt head fixture 2 are identical with embodiment one, two, three, different is: circular boop shape or the spiral component 44 of described holder part 4 for being wound in body of rod meander sections surface, this member is placed in body of rod meander sections, as shown in the figure, it is a spring-like structures, can do flexural deformation according to anchor rod body 1 revolution form, and the space of its upper spring body of rod between radially can hold slurries and fully pass through, permeate.When the revolution anchor pole places in the anchor hole 3, this circular boop shape or spiral component 44 both can combine with the slurry in when grouting, induration after the slip casting is formed to have the supporting body of circular boop or spiral skeleton, can improve the intensity of injecting cement paste 5, and can be used as supporting body and bear axis force of anchor, so improved anchor-holding force of anchor bolt greatly.Owing to fit in circular boop shape or the relative soil layer of spiral component 44 frictional force or the rock stratum of side within the anchor pole meander sections, reduce greatly simultaneously, therefore, when pulling at anchor hole 3 external end heads, anchor rod body 1 is easy to be drawn out, and has realized the recovery of anchor pole.
The circular boop shape or the spiral component 44 of present embodiment have bigger screen resilience equally, when entering to the anchor hole of expansion, it is under elastic reaction, just can drive anchor rod body 1 meander sections according to the tolerant space of the expanded hole of anchor hole anchoring section 11 and make resilient expansion, radius of curvature enlarges, and makes that the body of rod is easier to be drawn out.
The concrete job practices of present embodiment structural anchor bar is:
1) boring: on soil layer or rock, get out anchor hole 3 with rig according to designing requirement;
2) reaming: anchor hole 3 bottoms are enlarged, and the anchor hole aperture that makes anchor hole 3 bottom body of rod meander sections put the position increases, and is 8 times of other anchor hole apertures, position;
3) system anchor: the above intercepting of the twice body of rod of pressing rock-bolt length or unit rock-bolt length, then circular boop shape or spiral component 44 are placed in anchor rod body 1 middle meander sections position and fixing, to contain the body of rod middle part doubling of circular boop shape or spiral component 44 again, the doubling position is anchor rod body 1 meander sections, makes circular boop shape or spiral component 44 together crooked with body of rod meander sections;
4) grouting: the anchor rod body 1 that will contain above-mentioned circular boop shape or spiral component 44 is inserted in the anchor hole 3, make in the anchor hole 3 after anchor rod body 1 meander sections places reaming, two ends places outside the anchor hole 3, casting cement slurry, mortar, sandstone cement mixing are starched or chemical grout in anchor hole 3 then, need allocate parameters such as suitable concentration of slurry and gravel size proportioning during slip casting, so that slurry fully permeates, and fill up all spaces in the anchor hole 3, treat to form after it solidifies an injecting cement paste 5 that has circular boop or a spiral skeleton, be surrounded on around the anchor rod body.
Embodiment five:
As shown in Figure 5, present embodiment anchor rod body 1, injecting cement paste 5 and rock bolt head fixture 2 are identical with embodiment one, two, three, different is: described holder part 4 is for having certain elasticity, deformable column, tubular, spherical or U-shaped member, present embodiment is netted cylindrical member 45, above-mentioned each member can be the column or the tubular spare of coiling, or does the compressive strain of pushing or doing alternate manner earlier.Because anchor rod body 1 has certain rigidity and screen resilience, and anchor hole 3 also has certain tolerant space, therefore, after in anchor rod body 1 places anchor hole 3, anchor rod body 1 after the doubling can open voluntarily, be between each body of rod of anchoring section and can form the single-revolution space, netted cylindrical member 45 can be positioned in the above-mentioned space, is positioned at body of rod meander sections inboard.Because netted cylindrical member 45 has certain elasticity, and has certain precompression before putting, therefore, rear flank in anchor rod body 1 meander sections in being positioned over anchor hole 3, can outwards stretch automatically, fill up the meander sections inner chambers, fit in side within the anchor pole meander sections, the mesh on it can hold slurries and fully pass through, permeates.Netted cylindrical member 45 both can combine with the slurry in when grouting, and the induration after the slip casting is formed to have the supporting body of netted cylinder skeleton, can improve the intensity of injecting cement paste 5, and can be used as supporting body and bear axis force of anchor, increased the uplift resistance of anchor pole.During body of rod termination outside pulling at anchor hole 3, anchor rod body 1 is easy to be drawn out, and has realized the recovery of anchor pole., can pull out successively during as many steel strand by root as the body of rod.
The concrete job practices of said structure anchor pole is:
1) boring: on soil layer or rock, get out anchor hole 3 sizes with rig according to designing requirement;
2) system anchor: press the above intercepting of the twice anchor rod body 1 of rock-bolt length or unit rock-bolt length, with body of rod middle part doubling, the doubling position is anchor rod body 1 meander sections, the anchor pole after the doubling is placed in the anchor hole 3 again then;
3) grouting: earlier netted cylindrical member 45 is pushed or does the compressive strain of alternate manner, and then it is positioned over meander sections inboard in the middle of the interior anchor rod body of anchor hole 31, place anchor hole 3 interior netted cylindrical member 45 because its elastic reaction, can extend automatically, fill up the meander sections inner chambers; Anchor rod body 1 two ends places outside the anchor hole 3, casting cement slurry, mortar, sandstone cement mixing are starched or chemical grout in anchor hole 3 again, allocate parameters such as suitable concentration of slurry and gravel size proportioning during slip casting, so that slurry fully permeates, and fill up all spaces in the anchor hole 3, treat can to form after it solidifies one and place anchor pole bar bar 1 meander sections inboard and have an injecting cement paste 5 of netted cylinder skeleton.
Embodiment six:
As shown in Figure 6, present embodiment anchor rod body 1, injecting cement paste 5 and rock bolt head fixture 2 are all identical with embodiment one, two, three, four, different is: described anchor rod body 1 straightway is arranged with short sleeve 6, between this short sleeve 6 and the anchor rod body 1, be equipped with anticorrisive agent or lubrication oil, mainly be the smooth slippage when being convenient to body of rod recovery, reduce and reclaim pulling force.And holder part 4 is arranged at the anchor rod body meander sections, and it is provided with situation, construction party rule according to the difference of the foregoing description and difference can be selected for use arbitrarily.
Embodiment seven:
As shown in Figure 7, present embodiment and embodiment six are basic identical, different is: described anchor rod body 1 integral body is arranged with long sleeve pipe 7, between this long sleeve pipe 7 and the anchor rod body 1, be equipped with anticorrisive agent or lubrication oil, and holder part 4 is arranged on the anchor rod body 1 meander sections sleeve pipe, same, it is provided with situation, construction party rule according to the difference of embodiment and difference can be selected for use arbitrarily.This structure can guarantee the smooth slippage of the body of rod fully for the foregoing description structure, reduces to reclaim pulling force.
For improving the bond stress between holder part 4 and the injecting cement paste 5,, also be provided with projection or the surface is corrugated on the surface that the foregoing description holder part 4 contacts with injecting cement paste 5.This structure can make holder part 4 bond with slurry better, prevents injecting cement paste 5 crackings, has increased the longitudinal frictional force between holder part 4 and the injecting cement paste 5 simultaneously, can further improve the bond stress of injecting cement paste 5 and the extraction-resistant behavior of anchor pole.
Claims (9)
1, a kind of body of rod revolution anchor pole comprises that revolution is placed on the interior body of rod of anchor hole, and described body of rod termination places outside the anchor hole, straightway is located at the free section of anchor hole, meander sections places the anchor hole anchoring section, it is characterized in that: the described body of rod constitutes meander sections by its middle part doubling, and two terminations all place outside the anchor hole; On the described meander sections body of rod, be provided with and can do distortion so that the body of rod reclaims the holder part of slippage when pulling out according to the revolution form after the body of rod doubling, this holder part is poured into the interior injecting cement paste of anchor hole when constructing and combines, and the supporting body of axis force of anchor is born in formation.
2, body of rod revolution anchor pole according to claim 1, it is characterized in that: described body of rod meander sections is put the anchor hole aperture of position greater than other anchor hole apertures, position.
3, body of rod revolution anchor pole according to claim 1 is characterized in that: deformable column, tubular, the spherical or U-shaped shape member of described holder part for being positioned over body of rod meander sections inboard.
4, body of rod revolution anchor pole according to claim 1, it is characterized in that: described holder part is inboard and can drive the elastic component of body of rod meander sections expansion for being located at body of rod meander sections, or for being located at the reticular component on body of rod meander sections surface, or for resilient sleeve with holes or the sidewall that is placed in body of rod meander sections surface is netted sleeve, or circular boop shape or helical form member for being wound in body of rod meander sections surface.
5, body of rod revolution anchor pole according to claim 2 is characterized in that: the anchor hole aperture of described body of rod meander sections storing position is 2～10 times of other anchor hole apertures, position.
6, body of rod revolution anchor pole according to claim 4 is characterized in that: the described body of rod meander sections inboard of being located at can drive the elastic component of body of rod meander sections expansion or be strip sheet or tabular elastic component, or is the U-shaped elastic component.
7, according to claim 1 or 3 or 4 or 6 described body of rod revolution anchor poles, it is characterized in that: described body of rod straightway is arranged with sleeve pipe, and the holder part is arranged on the body of rod meander sections.
8, according to claim 1 or 3 or 4 or 6 described body of rod revolution anchor poles, it is characterized in that: described body of rod integral body is arranged with sleeve pipe, and the holder part is arranged on the body of rod meander sections sleeve pipe.
9, according to claim 3 or 4 described body of rod revolution anchor poles, it is characterized in that: the contact surface of described holder part and injecting cement paste has projection or surface to be corrugated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100619746A CN100526564C (en) | 2006-08-04 | 2006-08-04 | Rotating anchor rod of a rod and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100619746A CN100526564C (en) | 2006-08-04 | 2006-08-04 | Rotating anchor rod of a rod and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1908323A CN1908323A (en) | 2007-02-07 |
| CN100526564C true CN100526564C (en) | 2009-08-12 |
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| CNB2006100619746A Expired - Fee Related CN100526564C (en) | 2006-08-04 | 2006-08-04 | Rotating anchor rod of a rod and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101586466B (en) * | 2009-06-09 | 2011-04-06 | 广州市鲁班建筑有限公司 | Pressure type anchor rod |
| CN101798811A (en) * | 2010-03-26 | 2010-08-11 | 张继红 | Recyclable end-bearing anchor rod |
| CN103469793B (en) * | 2012-06-08 | 2016-10-05 | 深圳市工勘岩土工程有限公司 | For connecting sealing off and covering anchorage body structure and the construction method thereof of Vierendeel girder and anchor pole |
| CN103290842A (en) * | 2013-05-30 | 2013-09-11 | 曾庆义 | Hinge-type anchor device with automatic fastener and anchor rod structure |
| CN109356153A (en) * | 2018-10-29 | 2019-02-19 | 武大巨成结构股份有限公司 | A kind of steel disc has bushing type soil anchor bolt anchor head |
| CN112921963A (en) * | 2021-01-28 | 2021-06-08 | 岳学文 | Foundation pit support detachable anchor rod |
| CN112963424B (en) * | 2021-03-11 | 2022-09-02 | 凯木源(上海)化学材料有限公司 | Anchor bolt and manufacturing method thereof |
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2006
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Non-Patent Citations (2)
| Title |
|---|
| 岩土锚固研究与新进展. 程良奎.岩石力学与工程学报，第24卷第24期. 2005 |
| 岩土锚固研究与新进展. 程良奎.岩石力学与工程学报，第24卷第24期. 2005 * |
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| CN1908323A (en) | 2007-02-07 |
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