CN106320367A - Prestress rock anchor rod foundation with anchor rods capable of being replaced - Google Patents

Abstract

The invention discloses a prestress rock anchor rod foundation with anchor rods capable of being replaced. The prestress rock anchor rod foundation comprises a concrete bearing platform formed by concrete. A plurality of high-strength grouting piles circumferentially distributed are arranged on the bottom face of the concrete bearing platform. The prestress rock anchor rods are coaxially arranged in the high-strength grouting piles. The upper ends of the prestress rock anchor rods are connected with top anchor rod fixing plates through top nuts. An anchor cage ring assembly is arranged in the center of the concrete bearing platform. The prestress rock anchor rods are sleeved with first rigidity sleeves used for isolating grouting materials. The lower ends of the prestress rock anchor rods penetrate bottom anchor rod fixing plates and are in threaded connection with first isolation caps integrally arranged and used for isolating concrete. The opening ends of the first isolation caps are in sealed connection with the bottom anchor rod fixing plates. The integrally-arranged isolation caps are adopted in the prestress rock anchor rod foundation, a structure form of a sealing assembly is changed, and the prestress rock anchor rod foundation has the beneficial effects that cost is reduced, and replacing is convenient.

Description

The prestressed rock anchor rod foundation of replaceable anchor pole

Technical field

The present invention relates to wind power industry technical field of civil engineering, particularly to the prestressed rock of replaceable anchor pole Anchor rod foundation and replacing construction method.

Background technology

At present for large-scale or the frame of large equipment, pylon, including wind-driven generator, wind turbine, power transmission line The building such as street lighting and advertiser, bridge pad, business signboard, highway signboard, Ski Lift all uses scene to take The concrete foundation built supports.

The most in recent years, along with China's rapid development of economy and the raising of social environment consciousness, wind-power electricity generation scale Day by day increasing, wind generator tower is increasingly becoming main flow.For adapting to different geological conditions, also have different coagulation soil matrixs Plinth, at Mountain Conditions, such as: be suitable under conditions of solid rock, decomposed rock, sandstone, argillaceous sandstone selecting prestressed rock Anchor rod foundation.

Traditional prestressed rock anchor rod foundation, including the concrete bearing platform formed by concrete, the end of concrete bearing platform Face is provided with several high-strength grouting posts being circumferentially distributed, and is coaxially provided with prestressed rock anchor pole in high-strength grouting post, described The upper end of prestressed rock anchor pole be connected with roll bolt fixed plate by top nut, concrete bearing platform center is located at anchor cage Ring assemblies；Anchor cage ring assemblies includes upper and lower anchor slab and crab-bolt, and the bottom of crab-bolt is fixed by nut, whole crab-bolt and nut The most exposed in concrete, to by crab-bolt removal, it is necessary to make crab-bolt separate with nut, but crab-bolt and nut are fixed In concrete, turn torsion the biggest, it is not easy to rotate crab-bolt and nut, also result in the feelings that crab-bolt cannot separate with nut Condition.

Chinese patent application is published as CN105155571A and discloses a kind of removable prestressed anchor pin device and peace thereof Dress method and replacing options, it mainly includes anchor slab, lower anchor slab, and in connection, anchor slab and the crab-bolt of lower anchor slab, be enclosed within crab-bolt Outer plastic bushing, the upper/lower terminal of plastic bushing, by thermal shrinkable sleeve collapsed seal, the thermal shrinkable sleeve of plastic bushing upper end is provided with Nonmetal leveling nut, crab-bolt top is provided with top nut, and the bottom of crab-bolt is affixed with lower anchor slab by lower nut, and at lower spiral shell Female sheathed nut box in outside is so that concrete is isolated with crab-bolt and nut.

The utility model patent authorizing open (bulletin) number: CN201747544U discloses the installation of a kind of wind-driven generator The installation pedestal of pedestal and this wind-driven generator of wind-driven generator, including: concrete body and at least two lower margin spiral shell Bolt, described at least two foundation bolt is embedded in described concrete body；Described at least two lower margin spiral shell One end of bolt is provided with the backing plate flange of tower connecting wind-driven generator, another of described at least two foundation bolt End is provided with anchoring flange, and described backing plate flange and anchoring flange are all installed on described concrete body；Described foundation bolt On be arranged with the foundation bolt with sleeve two ends of foundation bolt and concrete body isolation be provided with and telescopic joint bellows.

Authorization Notice No. is that the utility model patent of CN 202023199 U discloses a kind of basis prestressing force anchor slab crab-bolt Molectron, including upper anchor slab, lower anchor slab, upper anchor slab and lower anchor slab are by long anchor bolts, the long anchor at the upper and lower plane of upper anchor slab Being separately installed with leveling nut on bolt, lower anchor slab is provided with the leveling bolt being evenly distributed, near interior on upper anchor slab baseplane Ring and outer shroud edge are equipped with the welding rivet being evenly distributed, and the long crab-bolt at the lower upper and lower plane of anchor slab is separately installed with Thin nut and nut, be set with heat shrinking sleeve, crab-bolt sleeve pipe in long crab-bolt.

The utility model patent of Authorization Notice No. CN 203947487 U discloses a kind of wind turbine tower basis and in advance should Power crab-bolt, including two crab-bolt threaded upper ends sections, crab-bolt lower end thread segment, upper screw thread and polished rod changeover portion, lower screw thread and polished rod mistake The section of crossing, crab-bolt light bar segment, thin heat shrinking sleeve, thick heat shrinking sleeve, in described thin heat shrinking sleeve suit crab-bolt light bar segment, described Thick heat shrinking sleeve is sleeved on the bottom of crab-bolt light bar segment, and thin heat shrinking sleeve is plugged between thick heat shrinking sleeve and crab-bolt light bar segment, Crab-bolt threaded upper ends section is positioned at the upper end of crab-bolt light bar segment, and crab-bolt lower end thread segment is positioned at the lower end of crab-bolt light bar segment, described Upper screw thread and polished rod changeover portion are positioned at the changeover portion of crab-bolt threaded upper ends section and crab-bolt light bar segment, lower screw thread and polished rod transition section Changeover portion in crab-bolt lower end thread segment Yu crab-bolt light bar segment.

To sum up, seeing Figure 12 to Figure 14, all above mode is being adopted to realize the isolation between crab-bolt 4 and concrete Mode be at the outer sheathed plastic bushing 42 of crab-bolt 4, plastic bushing 42 two ends are sealed by thermal shrinkable sleeve 41.First First, nut box is arranged with nut split, needs by nut-welding on lower anchor slab to realize the circumferentially fixed of nut, but Weld nut or cause the Stress non-homogeneity of flange of the whole end, also can increase by one welding sequence, thus increase cost；Next, for Meeting execution conditions, plastic bushing 42 and crab-bolt 4 need certain gap, and the most all fill at whole crab-bolt 4 device In the middle of concrete, during pouring, concrete will certainly produce, to plastic bushing 42, the power extruded and force plastic bushing 42 It is deformed so that between crab-bolt 4 with plastic bushing 42 the most coaxial, it is difficult to make the crab-bolt 4 of fracture screw out and be replaced；Again, plastics The two ends of sleeve pipe 42 carry out collapsed seal by thermal shrinkable sleeve 41, will make bore at plastic bushing 42 insert port thus Diminish, shown in Figure 14, then new crab-bolt 4 is difficult to be inserted in plastic bushing 42, thus cause replacing crab-bolt 4 not side Just.

Summary of the invention

The purpose of the present invention one is to provide the prestressed rock anchor rod foundation of replaceable anchor pole so that it is have reduction cost, Change convenient advantage.

The above-mentioned technical purpose one of the present invention has the technical scheme that the pre-of a kind of replaceable anchor pole Stress Rock Bolt Foundation, including the concrete bearing platform formed by concrete, on the bottom surface of described concrete bearing platform and bottom surface Following rock mass is provided with several high-strength grouting posts being circumferentially distributed, in described high-strength grouting post, is coaxially provided with Prestressed Rock Killagh bar, the upper end of described prestressed rock anchor pole is connected with roll bolt fixed plate by top nut, described coagulation Soil cushion cap center is provided with anchor cage ring assemblies；The rigid casing for isolating grouting material it is arranged with on described prestressed rock anchor pole One, the lower end of described prestressed rock anchor pole is connected with in being wholely set and mixed for isolating through bottom anchor pole fixed plate screw thread The isolating cap one of solidifying soil, the opening of isolating cap one is tightly connected with bottom anchor pole fixed plate.

By using technique scheme, on the one hand can have arranging of the outer sheathed rigid casing of prestressed rock anchor pole Together with effect obstruct concrete is cast in prestressed rock anchor pole, on the other hand due to it, there is rigidity watering at whole concrete It is unlikely to deform so that rigid casing one keeps preferable axiality with prestressed rock anchor pole during building, in dismounting and peace Fill the when of prestressed rock anchor pole convenient；It addition, the two ends of rigid casing one all with roll bolt fixed plate and the end Portion's anchor pole fixed plate is tightly connected and can effectively prevent liquid in casting process from contacting with prestressed rock anchor pole and corrode pre- Stress rock-bolt；Cross the isolating cap one of integrated setting to have abandoned nut or nut box are welded on by prior art and cast anchor Step on plate, but make isolating cap circumferentially fixed by the effect that pours of concrete, it is to avoid the produced defect of welding, On the one hand improve the performance of crab-bolt, on the other hand make that installation is the most simple and convenient, cost is lower.

It is provided with shoulder hole one, shoulder hole as the most described roll bolt fixed plate and bottom anchor pole fixed plate Two, in described rigid casing one upper end extends to shoulder hole one and abut with the step of shoulder hole one, lower end extends to ladder In hole two and abut with shoulder hole two step.By using technique scheme, rigid casing one is extended directly to top anchor Bar fixed plate and the shoulder hole one of bottom anchor pole fixed plate, the interior sealing that can realize rigid casing of shoulder hole two, due to rank In ladder hole one and shoulder hole two, the diameter of aperture closes with the diameter compatible of crab-bolt, therefore can effectively prevent roll bolt from fixing Plate moves radially, and in like manner bottom anchor pole fixed plate also will not move radially, by heat simultaneously during which overcomes prior art Contracting set realizes sealing the defect brought, then changes the insertion of convenient new crab-bolt when of crab-bolt.

As preferably, described prestressed rock anchor pole includes the first prestressed rock anchor pole and the second Prestressed Rock Killagh bar, the first described prestressed rock anchor pole and the second prestressed rock anchor pole are threaded by adapter sleeve, described Rigid casing one is sheathed on the first prestressed rock anchor pole, and it is solid that the two ends of rigid casing one are sealedly connected on roll bolt respectively Determine on plate and adapter sleeve.

By using technique scheme, owing to prestressed rock rock-bolt length is longer, and the position of anchor pole fracture is general Concentrate on middle part.Therefore two parts it are divided into, then threaded by adapter sleeve, ensure prestressed rock thus The bonding strength of anchor pole, adapter sleeve is the equal of the effect of isolating cap, can be by by the effect of rigid casing one and adapter sleeve First prestressed rock anchor pole is isolated with concrete, when the first prestressed rock anchor pole fracture, by rotating the first prestressing force The end of rock-bolt just can be drawn off.

As preferably, described rigid casing one upper end extends to upper end and extends to the shoulder hole of roll bolt fixed plate In one, lower end extends in the shoulder hole three of adapter sleeve.

By using technique scheme, can be by the first prestressed rock by the effect of rigid casing one and adapter sleeve Anchor pole is isolated with concrete, when the first prestressed rock anchor pole fracture, by rotating the end of the first prestressed rock anchor pole Just can be drawn off.

As preferably, described anchor cage ring assemblies includes anchor slab, lower anchor slab and connects upper anchor slab and lower anchor slab Crab-bolt, described crab-bolt is arranged with rigid casing two, described rigid casing two two ends be sealedly connected on anchor slab and under On anchor slab, the upper end of described crab-bolt is connected with upper anchor slab by top nut, and the lower end of described crab-bolt passes lower anchor slab screw thread Being connected with in being wholely set and for the isolating cap two isolating concrete, the opening of isolating cap two is tightly connected with lower anchor slab.

By using technique scheme, the outer sheathed rigid casing two of crab-bolt arrange on the one hand can effectively intercept mixed Together with solidifying soil is cast in crab-bolt, on the other hand due to it has that rigidity is unlikely to deform in the casting process of whole concrete can So that rigid casing two and crab-bolt keep preferable axiality, convenient removing and installing crab-bolt when；It addition, just The two ends of property sleeve pipe two are all tightly connected with upper anchor slab and lower anchor slab and can effectively prevent liquid and crab-bolt in casting process Contact and corrode crab-bolt；By the isolating cap two of integrated setting can on the one hand make to load and unload convenient, cost is lower, separately On the one hand circumferentially fixed by with the effect that pours of concrete of isolating cap two, it is ensured that isolating cap two circumference will not rotate easily.

As preferably, it is cylindric or flat or prism-shaped that described crab-bolt stretches out the top of anchor slab.

By using technique scheme, crab-bolt is passed the top of upper anchor slab and is arranged to flat use can be facilitated to pull The top half of fracture anchor pole is rotated and takes out by hands.

As preferably, described isolating cap one, isolating cap two are closure nut, described rigid casing one, rigidity Sleeve pipe two is stainless steel tube or steel pipe or plastic conduit.

By using technique scheme, use closure nut lower directly as isolating cap cost, more convenient, use not Rust steel pipe or steel pipe or plastic conduit can improve antiseptic property.

The purpose of the present invention two is to provide the replacing construction method of the prestressed rock anchor rod foundation of a kind of replaceable anchor pole, Make it have reduction cost, change convenient advantage.

The above-mentioned technical purpose two of the present invention has the technical scheme that the pre-of a kind of replaceable anchor pole The replacing construction method of stress Rock Bolt Foundation, comprises the following steps；

A, by fracture prestressed rock anchor pole top take out；

The prestressed rock anchor pole that b, employing beche will rupture in stretching into rigid casing one takes out；

C, the prestressed rock anchor pole that insertion is new at the shoulder hole one of roll bolt fixed plate, at rotary-top prestressed rock Anchor pole so that it is end is screwed in isolating cap one, then the place above roll bolt fixed plate install successively new pad and Top nut.

The purpose of the present invention three is to provide the replacing construction method of the prestressed rock anchor rod foundation of a kind of replaceable anchor pole, Make it have reduction cost, change convenient advantage.

The above-mentioned technical purpose three of the present invention has the technical scheme that the pre-of a kind of replaceable anchor pole The replacing construction method of stress Rock Bolt Foundation, comprises the following steps；

A, detection prestressed rock anchor pole crack conditions, if being found to be prestressed rock anchor pole material or other system defect causes Fracture, then prepare to change the most unbroken rock-bolt；

B, from top by prestressed rock anchor pole take out；

C, the prestressed rock anchor pole that insertion is new at the shoulder hole one of roll bolt fixed plate, at rotary-top prestressed rock Anchor pole so that it is end is screwed in isolating cap one, then the place above roll bolt fixed plate install successively new pad and Top nut.

In sum, the method have the advantages that in prestressed rock anchor rod foundation, when needs are by prestressing force Rock-bolt disassembles from basis, prestressed rock anchor pole is set with stainless steel tube by whole prestressed rock anchor pole with mixed Solidifying soil is kept apart, and isolating cap one, together with concreting, limits isolating cap one and rotates with prestressed rock anchor pole, makes pre-answering Produce between power rock-bolt and isolating cap one and rotate against, so that prestressed rock anchor pole separates with isolating cap one, in addition Also improve the sealing structure between anchor pole and sleeve pipe abandoned prior art seals after can cause what anchor pole was difficult to insert to lack Fall into, it is achieved that the purpose replaceable, callable of the anchor pole on prestressed rock anchor rod foundation, and change easy construction, save Substantial amounts of maintenance cost, improves the economic worth on this basis.

Accompanying drawing explanation

Fig. 1 is the structural representation of the prestressed rock anchor rod foundation of replaceable anchor pole；

Fig. 2 is for embodying prestressed rock anchor pole and top, between bottom anchor pole fixed plate and rigid casing one in embodiment The schematic diagram of attachment structure；

Fig. 3 is A portion enlarged drawing in Fig. 2；

Fig. 4 is B portion enlarged drawing in Fig. 2；

Fig. 5 is the structural representation of isolating cap one；

Fig. 6 is for embodying the structural representation of annexation between rigid casing two, crab-bolt and upper and lower anchor slab in embodiment one Figure；

Fig. 7 is C portion enlarged drawing in Fig. 6；

Fig. 8 is D portion enlarged drawing in Fig. 6；

Fig. 9 is that embodiment three is for embodying the structural representation of prestressed rock anchor pole；

Figure 10 is E portion enlarged drawing in Fig. 9；

Figure 11 is the structural representation of embodiment four；

Figure 12 is the structural representation of the annexation in prior art between anchor pole, sleeve pipe and thermal shrinkable sleeve；

Figure 13 is for embodying state diagram when changing anchor pole in prior art;

Figure 14 is F portion enlarged drawing in Figure 13；

Figure 15 is the structural representation embodying beche.

In figure: 1, concrete bearing platform；11, casting concrete screed-coat；12, concrete cushion；2, anchor cage ring assemblies；2a、 Upper anchor slab；21a, shoulder hole four；2b, roll bolt fixed plate；21b, shoulder hole one；3a, lower anchor slab；31a, shoulder hole five；3b、 Bottom anchor pole fixed plate；31b, shoulder hole two；4a, prestressed rock anchor pole；41a, the first prestressed rock anchor pole；42a, second Prestressed rock anchor pole；4b, crab-bolt；41, thermal shrinkable sleeve；42, plastic bushing；43, adapter sleeve；431, shoulder hole three；51, rigid enclosure Guan Yi；52, rigid casing two；61a, top nut；61b, top nut；71, isolating cap one；72；Isolating cap two；9, bottom column Cylinder；10, rock mass；101；Polystyrene plate；11, sheath；111, drill bit.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is described in further detail.

Embodiment 1, see Fig. 1 to shown in 2, the prestressed rock anchor rod foundation of a kind of replaceable anchor pole, it is included in rock mass The concrete bearing platform 1 of the casting concrete screed-coat 11, concrete cushion 12 and the cylinder that pour on 10 and be embedded in mixed Anchor cage ring assemblies 2 in the middle part of solidifying soil cushion cap 1, concrete bearing platform 1 circle distribution has prestressed rock anchor pole 4a, Prestressed Rock killagh Bar 4a wears roll bolt fixed plate 2b, concrete bearing platform 1, concrete cushion 12, polystyrene plate 101 and concrete successively and looks for In the prestressed rock bolthole of flat bed 11 to rock mass 10.

The rigid casing 1 of the outer concrete being arranged with for isolation of prestressed rock anchor pole 4a, rigid casing 1 Two ends be tightly connected.

The upper end of prestressed rock anchor pole 4a is connected with roll bolt fixed plate 2b by top nut 61b, Prestressed Rock The lower end of killagh bar 4a is connected with bottom anchor pole fixed plate 2b.

The lower section of bottom anchor pole fixed plate 3b is positioned at the position of screwed hole and installs isolating cap 1, prestressed rock anchor pole 4a Extending to isolating cap 1 inside through bottom anchor pole fixed plate 3b and threaded with isolating cap 1, isolating cap 1 is mixed Solidifying soil is cast in prestressed rock bolthole, this mode make isolating cap 7 circumference be by with concrete pour effect Fixing, isolating cap 1 circumference will not rotate easily.

See Fig. 3, rigid casing 1 is tightly connected with prestressed rock anchor pole 4a upper end and makes the following instructions, top Arranging shoulder hole one 21b in anchor pole fixed plate 2b, the upper end of rigid casing 1 extends in shoulder hole one 21b, rigid casing The top of 1 abuts with the step of shoulder hole one 21b, and the diameter of the macropore in shoulder hole one 21b is equal to rigid casing 1 Diameter, the diameter compatible of the diameter of aperture and prestressed rock anchor pole 4a closes, the degree of depth of aperture equal to the degree of depth of macropore, such one The insertion of new prestressed rock anchor pole 4a can be also facilitated on the premise of realizing sealing effectiveness.

See Fig. 4, rigid casing 1 is tightly connected with prestressed rock anchor pole 4a lower end and makes the following instructions, bottom Arranging shoulder hole two 31b in anchor pole fixed plate 3b, rigid casing 1 extends in shoulder hole two 31b, the macropore of shoulder hole with The external diameter of rigid casing 1 is equal, and the aperture of shoulder hole two 31b closes with the diameter compatible of prestressed rock anchor pole 4a, aperture The degree of depth is equal to the half of bottom anchor pole fixed plate 3b thickness.On the one hand abandoned and carried out plastic bushing sealing by thermal shrinkable sleeve Mode, has on the other hand also abandoned in prior art because nut needs to be welded on the defect that bottom anchor pole fixed plate 3b is brought.

For below this embodiment, anchor cage ring assemblies 2 being done following description:

Shown in Figure 6, anchor cage ring assemblies 2 includes anchor slab 2a, lower anchor slab 3a and crab-bolt 4b, and crab-bolt 4b is double.Cast anchor The lower section of plate 3a is positioned at the position of screwed hole and installs isolating cap 2 72, and crab-bolt 4b extends in isolating cap 2 72 through lower anchor slab 3a Also threadeding with isolating cap 2 72 in portion, isolating cap 2 72 is cast in concrete, and this mode makes isolating cap 2 72 circumference Fixing be logical concrete pour effect so that isolating cap 2 72 circumference can be made to turn easily in the case of need not welding Dynamic.

See Fig. 7, rigid casing 2 52 is tightly connected with crab-bolt 4b upper end and makes the following instructions, upper anchor slab 2a is arranged Shoulder hole four 21a, the upper end of rigid casing 2 52 extends in shoulder hole four 21a, the top of rigid casing 2 52 and shoulder hole The step of four 21a abuts.

See Fig. 7, rigid casing 2 52 is tightly connected with crab-bolt 4b lower end and makes the following instructions, lower anchor slab 3a is arranged Shoulder hole five 31a, rigid casing 2 52 extends in shoulder hole five 31a, the macropore of shoulder hole five 31a and rigid casing 2 52 External diameter is equal, and the aperture of shoulder hole five 31a closes with the diameter compatible of crab-bolt 4b, and the degree of depth of aperture is equal to the one of lower anchor slab 3a thickness Half.On the one hand abandoned by the way of plastic bushing is sealed by thermal shrinkable sleeve, on the other hand also abandoned in prior art Because nut needs to be welded on the defect that lower anchor slab 3a is brought.

Embodiment 2, seeing Fig. 9 and Figure 10, the prestressed rock anchor rod foundation of a kind of replaceable anchor pole, with embodiment 2 phase It is than difference: it is the first prestressed rock anchor pole 41a, the second prestressed rock that prestressed rock anchor pole 4a is divided into two parts Anchor pole 42a, adapter sleeve 43, the first prestressed rock anchor pole 41a and the second prestressed rock anchor pole 42a are at the end face of adapter sleeve 43 Arranging installing hole 431, rigid casing 1 is set on the first prestressed rock anchor pole 41a, and the lower end of rigid casing 1 is prolonged Extending in installing hole 431, the diameter of installing hole 431 is equal to the equal diameters of rigid casing 1.

In this embodiment, the tip portion of the first prestressed rock anchor pole 41a is arranged to flat, is arranged such and can lead to Cross spanner to be drawn off.

Embodiment 4, shown in Figure 11, the prestressed rock anchor rod foundation of a kind of replaceable anchor pole, with the district of embodiment 1 Not being in anchor cage ring assemblies 2, crab-bolt 4b is double single structures.

Embodiment 5, the replacing construction method of prestressed rock anchor rod foundation of a kind of replaceable anchor pole, including following step Suddenly；

A, by fracture prestressed rock anchor pole 4a top take out；

The prestressed rock anchor pole 4a that b, employing beche will rupture in stretching into rigid casing 1 takes out；

C, the prestressed rock anchor pole 4a that insertion is new at shoulder hole one 21a of roll bolt fixed plate 3a, pre-at rotary-top Stress rock-bolt 4a so that it is end is screwed in isolating cap 1, then the place above roll bolt fixed plate 3a is successively New pad and top nut 61b are installed.

Shown in Figure 15, in the present embodiment, the concrete structure of beche includes sheath 11 and is arranged in sheath 11 Drill bit 111, sheath 11 is steel bushing, the diameter of the sheath lower end diameter slightly larger than prestressed rock anchor pole 4a.Sheath 11 is stretched into Rigid casing 1 is interior and is enclosed within the outside of fracture prestressed rock anchor pole 4a by sheath 11 and prestressed rock anchor pole 4a Interference fits realize fixing, the fracture end face that drill bit 111 stretches in sheath 11 with fracture prestressed rock anchor pole 4a is conflicted, and bores 111 coordinate electric drills used along, and drill bit 111 drives the latter half of fracture prestressed rock anchor pole 4a reverse while piercing Rotate, make fracture prestressed rock anchor pole 4a exit from isolating cap 1.Owing to prestressed rock anchor pole 4a fracture end face is uneven Whole, when drill bit 111 just starts and pierces when, therefore there will be play, rigid casing one can be effectively protected in the effect of sheath 11 51.The shell of this oversheath 11 and electric drill is fixed, to prevent sheath 11 from dropping in rigid casing 1.

Embodiment 6, the replacing construction method of prestressed rock anchor rod foundation of a kind of replaceable anchor pole, including following step Suddenly；

A, detection prestressed rock anchor pole 4a crack conditions, if being found to be prestressed rock anchor pole 4a material or other system defect Cause fracture, then prepare to change the most unbroken rock-bolt 4a；

B, from top by prestressed rock anchor pole 4a take out；

C, the prestressed rock anchor pole 4a that insertion is new at shoulder hole one 21a of roll bolt fixed plate 3a, pre-at rotary-top Stress rock-bolt 4a so that it is end is screwed in isolating cap 1, then the place above roll bolt fixed plate 3a is successively New pad and top nut 61b are installed.

Owing to the structure of anchor cage ring assemblies 2 is similar with the structure of prestressed rock anchor pole 4a, therefore changing crab-bolt 4b not Again repeating.

This specific embodiment is only explanation of the invention, and it is not limitation of the present invention, people in the art The present embodiment can be made after reading this specification by member as required does not has the amendment of creative contribution, but as long as at this All protected by Patent Law in the right of invention.

Claims (9)

1. a prestressed rock anchor rod foundation for replaceable anchor pole, including the concrete bearing platform (1) formed by concrete, described Rock mass on the bottom surface of concrete bearing platform (1) and below bottom surface is provided with several high-strength grouting posts being circumferentially distributed (13), prestressed rock anchor pole (4a), described prestressed rock anchor pole (4a) it are coaxially provided with in described high-strength grouting post (13) Upper end be connected with roll bolt fixed plate (2b) by top nut (61b), described concrete bearing platform (1) center is provided with anchor Cage ring assemblies (2)；It is characterized in that: on described prestressed rock anchor pole (4a), be arranged with the rigid enclosure for isolating grouting material Pipe one (51), the lower end of described prestressed rock anchor pole (4a) is connected with in integrally setting through bottom anchor pole fixed plate (3b) screw thread Putting and for isolating the isolating cap one (71) of concrete, the opening of isolating cap one (71) seals with bottom anchor pole fixed plate (3b) Connect.

The prestressed rock anchor rod foundation of replaceable anchor pole the most according to claim 1, it is characterised in that: described top Anchor pole fixed plate (2b) and bottom anchor pole fixed plate (3b) are provided with shoulder hole one (21b), shoulder hole two (31b), and described is firm Property sleeve pipe one (51) upper end extend in shoulder hole one (21b) and abut with the step of shoulder hole one (21b), lower end extends to rank In ladder hole two (31b) and abut with shoulder hole two (31b) step.

The prestressed rock anchor rod foundation of replaceable anchor pole the most according to claim 1, it is characterised in that: described pre-should Power rock-bolt (4a) includes the first prestressed rock anchor pole (41a) and the second prestressed rock anchor pole (42a), described One prestressed rock anchor pole (41a) is threadeded by adapter sleeve (43) with the second prestressed rock anchor pole (42a), and described is firm Property sleeve pipe one (51) is sheathed on the first prestressed rock anchor pole (41a), and the two ends of rigid casing one (51) are tightly connected respectively In roll bolt fixed plate (2b) and adapter sleeve (43).

The prestressed rock anchor rod foundation of replaceable anchor pole the most according to claim 3, it is characterised in that: described rigidity Sleeve pipe one (51) upper end extends in shoulder hole one (21b), and lower end extends in the shoulder hole three (431) of adapter sleeve (43).

The prestressed rock anchor rod foundation of replaceable anchor pole the most according to claim 1, it is characterised in that: described anchor cage Ring assemblies (2) includes anchor slab (2a), lower anchor slab (3a) and connects upper anchor slab (2a) and the crab-bolt (4b) of lower anchor slab (3a), Being arranged with rigid casing two (52) in described crab-bolt (4b), described rigid casing two (52) two ends are sealedly connected on anchor slab (2a) and on lower anchor slab (3a), the upper end of described crab-bolt (4b) is connected with upper anchor slab (2a) by top nut (61a), described The lower end of crab-bolt (4b) is connected with in being wholely set and for the isolating cap two isolating concrete through lower anchor slab (3a) screw thread (72), the opening of isolating cap two (72) is tightly connected with lower anchor slab (3a).

The prestressed rock anchor rod foundation of replaceable anchor pole the most according to claim 5, it is characterised in that: described crab-bolt (4b) top stretching out anchor slab (2a) is cylindric or flat or prism-shaped.

The prestressed rock anchor rod foundation of replaceable anchor pole the most according to claim 1, it is characterised in that: described isolation Cap one (71), isolating cap two (72) are closure nut, and described rigid casing one (51), rigid casing two (52) are rustless steel Pipe or rigid plastics or steel pipe.

8. a prestressed rock anchor rod foundation based on claim 1 to the 7 replaceable anchor pole of any one claim is more Change construction method, it is characterised in that comprise the following steps；

A, the top of the prestressed rock anchor pole (4a) that will rupture are taken out；

The prestressed rock anchor pole (4a) that b, employing beche will rupture in stretching into rigid casing one (51) takes out；

C, the prestressed rock anchor pole (4a) that insertion is new from the shoulder hole one (21a) of roll bolt fixed plate (3a), at top Rotate prestressed rock anchor pole (4a) so that it is end is screwed in isolating cap one (71), then in roll bolt fixed plate (3a) The place of top installs new pad and top nut (61b) successively.

9. one kind based on the prestressed rock anchor rod foundation of replaceable anchor pole described in claim 1 to 7 any one claim Replacing construction method, it is characterised in that comprise the following steps；

A, detection prestressed rock anchor pole (4a) crack conditions, if being found to be prestressed rock anchor pole (4a) material or other system Defect causes fracture, then prepare to change the most unbroken rock-bolt (4a)；

B, from top by prestressed rock anchor pole (4a) take out；

C, the prestressed rock anchor pole (4a) that insertion is new from the shoulder hole one (21a) of roll bolt fixed plate (3a), at top Rotate prestressed rock anchor pole (4a) so that it is end is screwed in isolating cap one (71), then in roll bolt fixed plate (3a) The place of top installs new pad and top nut (61b) successively.