CN106320367B - The prestressed rock anchor rod foundation of replaceable anchor pole - Google Patents

Abstract

The invention discloses a kind of prestressed rock anchor rod foundations of replaceable anchor pole, it include the concrete bearing platform formed by concrete, the bottom surface of the concrete bearing platform is equipped with several high-strength grouting columns being circumferentially distributed, it is coaxially provided with prestressed rock anchor pole in the high-strength grouting column, the upper end of the prestressed rock anchor pole is connect by top nut with roll bolt fixed plate, and the concrete bearing platform center is equipped with anchor cage ring component；The rigid casing one for grouting material to be isolated is arranged on the prestressed rock anchor pole, the lower end of the prestressed rock anchor pole passes through bottom anchor pole fixed plate and screw thread to be connected with the isolating cap one in being wholely set and for concrete to be isolated, and open end and the bottom anchor pole fixed plate of isolating cap one are tightly connected.Present invention employs the isolating cap of integrated setting, the structure type for improving seal assembly makes it have and reduces cost, replaces convenient advantage.

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, more particularly to the prestressed rock of replaceable anchor pole Anchor rod foundation and replacement construction method.

Background technology

At present for large-scale or large equipment rack, pylon, including wind-driven generator, wind turbine, power transmission line The buildings such as street lighting and signal device, bridge pad, business signboard, highway signboard, Ski Lift are all made of scene and take The concrete foundation support built.

Especially in recent years, with the raising of China's rapid development of economy and social environment consciousness, wind-power electricity generation scale Increasingly increase, wind generator tower is increasingly becoming mainstream.For the geological conditions for adapting to different, different coagulation soil matrixs is also had Plinth, in Mountain Conditions, such as：It is suitable for selecting prestressed rock under conditions of solid rock, decomposed rock, sandstone, argillaceous sandstone Anchor rod foundation.

Traditional prestressed rock anchor rod foundation includes the concrete bearing platform formed by concrete, the bottom of concrete bearing platform Face is equipped with several high-strength grouting columns being circumferentially distributed, and prestressed rock anchor pole is coaxially provided in high-strength grouting column, described The upper end of prestressed rock anchor pole connect with roll bolt fixed plate by top nut, concrete bearing platform center is located at anchor cage Ring assemblies；Anchor cage ring component includes upper and lower anchor slab and anchor bolt, and the bottom end of anchor bolt is fixed by nut, entire anchor bolt and nut It is all exposed in concrete, to by anchor bolt removal, it is necessary to so that anchor bolt is detached with nut, but anchor bolt and nut are fixed In concrete, it is very big to turn torsion, it is not easy to rotate anchor bolt and nut, also result in the feelings that anchor bolt can not be detached with nut Condition.

Chinese patent application is published as CN105155571A and discloses a kind of replaceable prestressed anchor pin device and its peace Dress method and replacing options, include mainly upper anchor slab, lower anchor slab, and the anchor bolt of anchor slab and lower anchor slab in connection is sleeved on anchor bolt Outer plastic bushing, the upper/lower terminal of plastic bushing are equipped on the thermal shrinkable sleeve of plastic bushing upper end by thermal shrinkable sleeve collapsed seal Nonmetallic leveling nut, anchor bolt top are equipped with top nut, and the bottom of anchor bolt is affixed by lower nut and lower anchor slab, and in lower spiral shell Female outside is arranged a nut box so that concrete is isolated with anchor bolt and nut.

It authorizes open (bulletin) number:The utility model patent of CN201747544U discloses a kind of installation of wind-driven generator The installation pedestal of pedestal and the wind-driven generator wind-driven generator, including：Concrete body and at least two lower margin spiral shell Bolt, at least two foundation bolt are embedded in the concrete body；At least two lower margin spiral shell One end of bolt be provided with connection wind-driven generator tower backing plate flange, at least two foundation bolt it is another End is provided with anchoring flange, and the backing plate flange and anchoring flange are installed on the concrete body；The foundation bolt On be arranged with foundation bolt with sleeve both ends that foundation bolt is isolated with concrete body and be equipped with bellows with casing connection.

Authorization Notice No. is that the utility model patent of 202023199 U of CN discloses a kind of basic prestressing force anchor slab anchor bolt Sub-assembly, 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 upper and lower plane of anchor slab Leveling nut is separately installed on bolt, lower anchor slab is equipped with the leveling bolt being evenly distributed, close to interior on upper anchor slab baseplane Ring and outer shroud edge are equipped with the welding rivet being evenly distributed, and are separately installed in the long anchor bolt at the lower upper and lower plane of anchor slab Thin nut and nut are set with heat shrinking sleeve, anchor bolt casing in long anchor bolt.

The utility model patent of 203947487 U of Authorization Notice No. CN discloses a kind of wind turbine tower basis and answers in advance Power anchor bolt, including two anchor bolt threaded upper ends sections, anchor bolt lower thread section, upper screw thread and polished rod changeover portion, lower screw thread and polished rod mistake Section, anchor bolt light bar segment, thin heat shrinking sleeve, thick heat shrinking sleeve are crossed, the thin heat shrinking sleeve is set in anchor bolt light bar segment, described Thick heat shrinking sleeve is sleeved on the lower part of anchor bolt light bar segment, and thin heat shrinking sleeve is plugged between thick heat shrinking sleeve and anchor bolt light bar segment, Anchor bolt threaded upper ends section is located at the upper end of anchor bolt light bar segment, and anchor bolt lower thread section is located at the lower end of anchor bolt light bar segment, described Upper screw thread is located at the changeover portion of anchor bolt threaded upper ends section and anchor bolt light bar segment, lower screw thread and polished rod transition section with polished rod changeover portion In the changeover portion of anchor bolt lower thread section and anchor bolt light bar segment.

To sum up, referring to Figure 12 to Figure 14, all of above mode is in order to realize that being isolated between anchor bolt 4 and concrete is adopted Mode is that a plastic bushing 42 is arranged outside anchor bolt 4, and 42 both ends of plastic bushing are sealed by thermal shrinkable sleeve 41.It is first First, nut box and nut split settings, in order to realize that the circumferentially fixed of nut is needed by nut-welding on lower anchor slab, but Weldering nut or the Stress non-homogeneity for causing entire bottom flange, can also increase by one of welding sequence, to increase cost；Secondly, it is Meet execution conditions, plastic bushing 42 needs certain gap with anchor bolt 4, and is all filled substantially in 4 device of entire anchor bolt In concrete, concrete will certainly generate the power squeezed to plastic bushing 42 and force plastic bushing 42 during pouring It is deformed so that not coaxial between anchor bolt 4 and plastic bushing 42, it is difficult to so that the anchor bolt 4 of fracture is screwed out and be replaced；Again, plastics The both ends of casing 42 carry out collapsed seal by thermal shrinkable sleeve 41, will thus make the bore at 42 insert port of plastic bushing Become smaller, it is shown in Figure 14, then new anchor bolt 4 is difficult to be inserted into plastic bushing 42, to cause to replace the not side of anchor bolt 4 Just.

Invention content

The purpose of the present invention one is to provide the prestressed rock anchor rod foundation of replaceable anchor pole, make it have reduce cost, Replace convenient advantage.

The present invention above-mentioned technical purpose one technical scheme is that：A kind of replaceable anchor pole it is pre- Stress Rock Bolt Foundation, includes the concrete bearing platform formed by concrete, on the bottom surface of the concrete bearing platform and bottom surface It is equipped with several high-strength grouting columns being circumferentially distributed in rock mass below, Prestressed Rock is coaxially provided in the high-strength grouting column The upper end of killagh bar, the prestressed rock anchor pole is connect by top nut with roll bolt fixed plate, the coagulation Native cushion cap center is equipped with anchor cage ring component；The rigid casing for grouting material to be isolated is arranged on the prestressed rock anchor pole One, it is in be wholely set and be used to be isolated mixed that the lower end of the prestressed rock anchor pole, which passes through bottom anchor pole fixed plate and screw thread to be connected with, The isolating cap one of soil is coagulated, open end and the bottom anchor pole fixed plate of isolating cap one are tightly connected.

By using above-mentioned technical proposal, on the one hand the setting that rigid casing is arranged outside prestressed rock anchor pole can have Effect barrier concrete pours together with prestressed rock anchor pole, on the other hand since it has rigidity pouring in entire concrete Being unlikely to deform during building can make rigid casing one keep preferable concentricity with prestressed rock anchor pole, in dismounting and peace It fills more convenient when prestressed rock anchor pole；In addition, the both ends of rigid casing one with roll bolt fixed plate and bottom Portion's anchor pole fixed plate sealed connection can effectively prevent the liquid in casting process to contact and corrode pre- with prestressed rock anchor pole Stress rock-bolt；The isolating cap one for crossing integrated setting has been abandoned in the prior art to be welded on nut or nut box and has been casted anchor Step on plate, but make isolating cap circumferentially fixed by the effect that pours of concrete, defect caused by welding is avoided, On the one hand the performance of anchor bolt is improved, on the other hand so that installation is more simple and convenient, cost is lower.

It is equipped with stepped hole one, stepped hole as preferred the roll bolt fixed plate and bottom anchor pole fixed plate Two, one upper end of rigid casing extends in stepped hole one and is abutted with the step of stepped hole one, and lower end extends to ladder It is abutted in hole two and with two step of stepped hole.By using above-mentioned technical proposal, rigid casing one is extended directly into top anchor The sealing that rigid casing may be implemented in the stepped hole one of bar fixed plate and bottom anchor pole fixed plate, stepped hole two, due to rank The diameter of aperture is matched with the diameter of anchor bolt in terraced hole one and stepped hole two, therefore roll bolt can be effectively prevent to fix Plate moves radially, and similarly anchor pole fixed plate in bottom will not move radially, while which overcomes and passes through heat in the prior art Contracting set realizes defect caused by sealing, then replaces the insertion of more convenient new anchor bolt when anchor bolt.

Preferably, the prestressed rock anchor pole includes the first prestressed rock anchor pole and the second Prestressed Rock Killagh bar, the first prestressed rock anchor pole is threadedly coupled with the second prestressed rock anchor pole by connector sleeve, described Rigid casing one is sheathed on the first prestressed rock anchor pole, and the both ends of rigid casing one are sealedly connected on roll bolt and consolidate respectively On fixed board and connector sleeve.

By using above-mentioned technical proposal, since prestressed rock rock-bolt length is longer, and the position of anchor pole fracture is general Concentrate on middle part.Therefore two parts are divided into, are then threadedly coupled by connector sleeve, thus ensure prestressed rock The bonding strength of anchor pole, connector sleeve are the equal of the effect of isolating cap, can be incited somebody to action by the effect of rigid casing one and connector sleeve First prestressed rock anchor pole is isolated with concrete, when the first prestressed rock anchor pole is broken, by rotating the first prestressing force The end of rock-bolt can be drawn off.

Preferably, one upper end of rigid casing extends to the stepped hole that upper end extends to roll bolt fixed plate In one, lower end extends in the stepped hole three of connector sleeve.

It, can be by the first prestressed rock by the effect of rigid casing one and connector sleeve by using above-mentioned technical proposal Anchor pole is isolated with concrete, when the first prestressed rock anchor pole is broken, by the end for rotating the first prestressed rock anchor pole It can be drawn off.

Preferably, the anchor cage ring component includes upper anchor slab, lower anchor slab and the upper anchor slab of connection and lower anchor slab Anchor bolt, is arranged with rigid casing two in the anchor bolt, two both ends of rigid casing be sealedly connected on anchor slab and under On anchor slab, the upper end of the anchor bolt is connect by top nut with upper anchor slab, and the lower end of the anchor bolt passes through lower anchor slab and screw thread It is connected with the isolating cap two in being wholely set and for concrete to be isolated, the open end of isolating cap two is tightly connected with lower anchor slab.

By using above-mentioned technical proposal, be arranged outside anchor bolt rigid casing two setting on the one hand can effectively obstruct it is mixed Solidifying soil pours together with anchor bolt, on the other hand since it has rigid be unlikely to deform in the casting process of entire concrete can So that rigid casing two keeps preferable concentricity with anchor bolt, it is more convenient when removing and installing anchor bolt；In addition, just Property casing two both ends with upper anchor slab and lower anchor slab sealed connection can effectively prevent liquid and anchor bolt in casting process It contacts and corrodes anchor bolt；It can be on the one hand so that handling be more convenient, cost is lower, separately by the isolating cap two of integrated setting One side isolating cap two with concrete by pouring the circumferentially fixed of effect, it is ensured that isolating cap two is circumferential to be rotated easily.

Preferably, the top that the anchor bolt stretches out upper anchor slab is cylindric or flat or prism-shaped.

By using above-mentioned technical proposal, the top that anchor bolt is pierced by upper anchor slab is arranged to flat easy to use to pull Hand, which rotates the top half for being broken anchor pole, to be taken out.

Preferably, the isolating cap one, isolating cap two are closure nut, the rigid casing one, rigidity Casing two is stainless steel tube or steel pipe or plastic conduit.

It is lower directly as isolating cap cost using closure nut by using above-mentioned technical proposal, it is more convenient, using not Rust steel pipe or steel pipe or plastic conduit can improve antiseptic property.

The purpose of the present invention two is to provide a kind of replacement construction method of the prestressed rock anchor rod foundation of replaceable anchor pole, Making it have reduces cost, replaces convenient advantage.

The present invention above-mentioned technical purpose two technical scheme is that：A kind of replaceable anchor pole it is pre- The replacement construction method of stress Rock Bolt Foundation, includes the following steps；

A, the top for being broken prestressed rock anchor pole is taken out；

B, the prestressed rock anchor pole in rigid casing one by fracture is stretched into using beche to take out；

C, new prestressed rock anchor pole is inserted into from the stepped hole one of roll bolt fixed plate, in rotary-top prestressing force Rock-bolt makes its end be screwed into isolating cap one, then installs new pad successively at the place of the top of roll bolt fixed plate Piece and top nut.

The purpose of the present invention three is to provide a kind of replacement construction method of the prestressed rock anchor rod foundation of replaceable anchor pole, Making it have reduces cost, replaces convenient advantage.

The present invention above-mentioned technical purpose three technical scheme is that：A kind of replaceable anchor pole it is pre- The replacement construction method of stress Rock Bolt Foundation, includes the following steps；

A, prestressed rock anchor pole crack conditions are detected, if being found to be prestressed rock anchor pole material or other systems defect Cause to be broken, then prepares to replace all unbroken rock-bolt；

B, it is taken out from top by prestressed rock anchor pole；

C, new prestressed rock anchor pole is inserted into from the stepped hole one of roll bolt fixed plate, in rotary-top prestressing force Rock-bolt makes its end be screwed into isolating cap one, then installs new pad successively at the place of the top of roll bolt fixed plate Piece and top nut.

In conclusion the invention has the advantages that：In prestressed rock anchor rod foundation, when needing prestressing force Rock-bolt is disassembled from basis, and stainless steel tube is set on prestressed rock anchor pole by entire prestressed rock anchor pole and is mixed Solidifying soil is kept apart, and together with concreting, limitation isolating cap one rotates isolating cap one with prestressed rock anchor pole, makes pre- answer Relative rotation is generated between power rock-bolt and isolating cap one, to make prestressed rock anchor pole be detached with isolating cap one, in addition It also improves the sealing structure between anchor pole and casing and has abandoned lacking that anchor pole can be caused after sealing in the prior art to be difficult to be inserted into It falls into, realizes replaceable, the recyclable purpose of anchor pole on prestressed rock anchor rod foundation, and replace easy construction, save A large amount of maintenance cost improves the economic value on the basis.

Description of the drawings

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

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

Fig. 3 is the portions A enlarged drawing in Fig. 2；

Fig. 4 is the portions B enlarged drawing in Fig. 2；

Fig. 5 is the structural schematic diagram of isolating cap one；

Fig. 6 is the structure for embodying connection relation between rigid casing two, anchor bolt and upper and lower anchor slab in embodiment one Schematic diagram；

Fig. 7 is the portions C enlarged drawing in Fig. 6；

Fig. 8 is the portions D enlarged drawing in Fig. 6；

Fig. 9 is the structural schematic diagram that embodiment three is used to embody prestressed rock anchor pole；

Figure 10 is the portions E enlarged drawing in Fig. 9；

Figure 11 is the structural schematic diagram of example IV；

Figure 12 is the structural schematic diagram of the connection relation between anchor pole, casing and thermal shrinkable sleeve in the prior art；

Figure 13 is to be used to embody state diagram when replacing anchor pole in the prior art;

Figure 14 is the portions F enlarged drawing in Figure 13；

Figure 15 is the structural schematic diagram for embodying beche.

In figure：1, concrete bearing platform；11, casting concrete screed-coat；12, concrete cushion；2, anchor cage ring component；2a、 Upper anchor slab；21a, stepped hole four；2b, roll bolt fixed plate；21b, stepped hole one；3a, lower anchor slab；31a, stepped hole five；3b、 Bottom anchor pole fixed plate；31b, stepped hole two；4a, prestressed rock anchor pole；41a, the first prestressed rock anchor pole；42a, second Prestressed rock anchor pole；4b, anchor bolt；41, thermal shrinkable sleeve；42, plastic bushing；43, connector sleeve；431, stepped 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；Polyethylene benzene plate；11, sheath；111, drill bit.

Specific implementation mode

Below in conjunction with attached drawing, invention is further described in detail.

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

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

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

The lower section of bottom anchor pole fixed plate 3b is located at the position installation isolating cap 1 of threaded hole, prestressed rock anchor pole 4a Across bottom, anchor pole fixed plate 3b extends to one 71 inside of isolating cap and is threadedly coupled with isolating cap 1, and isolating cap 1 is mixed Solidifying soil is cast in prestressed rock bolthole, and it is by pouring effect with concrete that this mode, which makes isolating cap 7 circumferentially, Fixed, isolating cap 1 is circumferential to be rotated easily.

Referring to Fig. 3, the sealed connection of the upper ends rigid casing 1 and prestressed rock anchor pole 4a is made the following instructions, top One 21b of stepped hole is set on anchor pole fixed plate 2b, and the upper end of rigid casing 1 extends in one 21b of stepped hole, rigid casing One 51 top is abutted with the step of one 21b of stepped hole, and the diameter of the macropore in one 21b of stepped hole is equal to rigid casing 1 The diameter of diameter, aperture is matched with the diameter of prestressed rock anchor pole 4a, and the depth of aperture is equal to the depth of macropore, and such one The insertion of new prestressed rock anchor pole 4a can also be facilitated under the premise of realizing sealing effect.

Referring to Fig. 4, the sealed connection of the lower ends rigid casing 1 and prestressed rock anchor pole 4a is made the following instructions, bottom Two 31b of stepped hole is set on anchor pole fixed plate 3b, rigid casing 1 extends in two 31b of stepped hole, the macropore of stepped hole with The outer diameter of rigid casing 1 is equal, and the aperture of two 31b of stepped hole is matched with the diameter of prestressed rock anchor pole 4a, aperture Depth is equal to the half of bottom anchor pole fixed plate 3b thickness.On the one hand it has abandoned and by thermal shrinkable sleeve has been sealed plastic bushing On the other hand mode has also been abandoned in the prior art because nut needs to be welded on defect caused by the anchor pole fixed plate 3b of bottom.

Following explanation is done to anchor cage ring component 2 for below the embodiment：

Shown in Figure 6, anchor cage ring component 2 includes upper anchor slab 2a, lower anchor slab 3a and anchor bolt 4b, anchor bolt 4b are double. The lower section of lower anchor slab 3a is located at the position installation isolating cap 2 72 of threaded hole, and anchor bolt 4b extends to isolating cap two across lower anchor slab 3a 72 inside are simultaneously threadedly coupled with isolating cap 2 72, and isolating cap 2 72 is cast in concrete, this mode makes isolating cap 2 72 weeks To fixation be that logical concrete pours effect so that can make the circumferential direction of isolating cap 2 72 will not be light in the case where that need not weld Easily rotation.

Referring to Fig. 7, the sealed connection of the upper ends rigid casing 2 52 and anchor bolt 4b is made the following instructions, is arranged on upper anchor slab 2a The upper end of four 21a of stepped hole, rigid casing 2 52 extend in four 21a of stepped hole, the top of rigid casing 2 52 and stepped hole The step of four 21a abuts.

Referring to Fig. 7, the sealed connection of the lower ends rigid casing 2 52 and anchor bolt 4b is made the following instructions, is arranged on lower anchor slab 3a Five 31a of stepped hole, rigid casing 2 52 extend in five 31a of stepped hole, macropore and the rigid casing 2 52 of five 31a of stepped hole Outer diameter is equal, and the aperture of five 31a of stepped hole is matched with the diameter of anchor bolt 4b, and the depth of aperture is equal to the one of lower anchor slab 3a thickness Half.On the one hand it has abandoned in such a way that plastic bushing is sealed by thermal shrinkable sleeve, has on the other hand also abandoned in the prior art Because nut needs to be welded on defect caused by lower anchor slab 3a.

Embodiment 2, referring to Fig. 9 and Figure 10, a kind of prestressed rock anchor rod foundation of replaceable anchor pole, with 2 phase of embodiment Than difference lies in：It is the first prestressed rock anchor pole 41a, the second prestressed rock that prestressed rock anchor pole 4a, which is divided into two parts, Anchor pole 42a, connector sleeve 43, the first prestressed rock anchor pole 41a and the second prestressed rock anchor pole 42a are in the end face of connector sleeve 43 Mounting hole 431 is set, and rigid casing 1 is set on the first prestressed rock anchor pole 41a, and the lower end of rigid casing 1 is prolonged It extends in mounting hole 431, the diameter of mounting hole 431 is equal equal to the diameter of rigid casing 1.

The tip portion of the first prestressed rock anchor pole 41a is arranged to flat in the embodiment, and such setting can lead to Spanner is crossed to be drawn off.

Embodiment 4, a kind of shown in Figure 11, prestressed rock anchor rod foundation of replaceable anchor pole, the area with embodiment 1 It is not in anchor cage ring component 2, anchor bolt 4b is double single structures.

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

A, the top for being broken prestressed rock anchor pole 4a is taken out；

B, it is stretched into rigid casing 1 using beche and takes out the prestressed rock anchor pole 4a of fracture；

C, it is inserted into new prestressed rock anchor pole 4a from one 21a of stepped hole of roll bolt fixed plate 3a, is revolved at top Turn prestressed rock anchor pole 4a, its end is made to be screwed into isolating cap 1, then at the place of the top of roll bolt fixed plate 3a New gasket and top nut 61b are installed successively.

Shown in Figure 15, the concrete structure of beche includes sheath 11 and is arranged in sheath 11 in the present embodiment Drill bit 111, sheath 11 are steel bushing, and the diameter of sheath lower end is slightly larger than the diameter of prestressed rock anchor pole 4a.Sheath 11 is stretched into In rigid casing 1 and it is sleeved on the outside of fracture prestressed rock anchor pole 4a and passes through sheath 11 and prestressed rock anchor pole 4a Transition cooperation realize and fix that the fracture end face that drill bit 111 stretches into sheath 11 with fracture prestressed rock anchor pole 4a contradicts, and bores First 111 cooperation electric drill is used together, and drives the lower half portion of fracture prestressed rock anchor pole 4a reversed while drill bit 111 pierces Rotation, makes fracture prestressed rock anchor pole 4a be exited from isolating cap 1.Since prestressed rock anchor pole 4a fractures end face is uneven It is whole, therefore will appear play when drill bit 111 just starts to pierce, the effect of sheath 11 can be with effective protection rigid casing one 51.This oversheath 11 and the shell of electric drill are fixed, to prevent sheath 11 from falling in rigid casing 1.

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

A, prestressed rock anchor pole 4a crack conditions are detected, if being found to be prestressed rock anchor pole 4a materials or other systems Defect causes to be broken, then prepares to replace all unbroken rock-bolt 4a；

B, it is taken out from top by prestressed rock anchor pole 4a；

C, it is inserted into new prestressed rock anchor pole 4a from one 21a of stepped hole of roll bolt fixed plate 3a, is revolved at top Turn prestressed rock anchor pole 4a, its end is made to be screwed into isolating cap 1, then at the place of the top of roll bolt fixed plate 3a New gasket and top nut 61b are installed successively.

Since the structure of anchor cage ring component 2 is similar with the structure of prestressed rock anchor pole 4a, anchor bolt 4b is being replaced not Again it is repeating.

This specific embodiment is only explanation of the invention, is not limitation of the present invention, people in the art Member can as needed make the present embodiment the modification of not creative contribution after reading this specification, but as long as at this It is all protected by Patent Law in the right of invention.

Claims (6)

1. a kind of prestressed rock anchor rod foundation of replaceable anchor pole includes the concrete bearing platform (1) formed by concrete, described It is equipped on the bottom surface of concrete bearing platform (1) and in the rock mass below of bottom surface several high-strength grouting columns being circumferentially distributed （13）, the high-strength grouting column（13）Inside it is coaxially provided with prestressed rock anchor pole（4a）, the prestressed rock anchor pole（4a） Upper end pass through top nut（61b）With roll bolt fixed plate（2b）Connection, the concrete bearing platform（1）Center is equipped with anchor Cage ring component（2）；It is characterized in that：The prestressed rock anchor pole（4a）On be arranged with rigid enclosure for grouting material to be isolated Guan Yi（51）, the prestressed rock anchor pole（4a）Lower end pass through bottom anchor pole fixed plate（3b）And it is in integrally to set that screw thread, which is connected with, Set and be used to be isolated the isolating cap one of concrete（71）, isolating cap one（71）Open end and bottom anchor pole fixed plate（3b）Sealing Connection；

The roll bolt fixed plate（2b）And bottom anchor pole fixed plate（3b）Equipped with stepped hole one（21b）, stepped hole two （31b）, the rigid casing one（51）Upper end extends to stepped hole one（21b）It is interior and with stepped hole one（21b）Step support It connects, lower end extends to stepped hole two（31b）It is interior and with stepped hole two（31b）Step abuts；

The anchor cage ring component（2）Including upper anchor slab（2a）, lower anchor slab（3a）And the upper anchor slab of connection（2a）With lower anchor slab （3a）Anchor bolt（4b）, the anchor bolt（4b）On be arranged with rigid casing two（52）, the rigid casing two（52）Both ends It is sealedly connected on anchor slab（2a）And lower anchor slab（3a）On, the anchor bolt（4b）Upper end pass through top nut（61a）With it is upper Anchor slab（2a）Connection, the anchor bolt（4b）Lower end pass through lower anchor slab（3a）And it is in be wholely set and be used to be isolated mixed that screw thread, which is connected with, Coagulate the isolating cap two of soil（72）, isolating cap two（72）Open end and lower anchor slab（3a）It is tightly connected；

The anchor cage ring component（2）Upper anchor slab（2a）And lower anchor slab（3a）Equipped with stepped hole four（21a）, stepped hole five （31a）, the rigid casing two（52）Upper end extends to stepped hole four（21a）It is interior and with stepped hole four（21a）Step support It connects, lower end extends to stepped hole five（31a）It is interior and with stepped hole five（31a）Step abuts；

The isolating cap one（71）, isolating cap two（72）It is closure nut, the rigid casing one（51）, rigid casing Two（52）For rigid plastics or steel pipe.

2. the prestressed rock anchor rod foundation of replaceable anchor pole according to claim 1, it is characterised in that：It is described pre- to answer Power rock-bolt（4a）Including the first prestressed rock anchor pole（41a）And the second prestressed rock anchor pole（42a）, described One prestressed rock anchor pole（41a）With the second prestressed rock anchor pole（42a）Pass through connector sleeve（43）It is threadedly coupled, described is rigid Property casing one（51）It is sheathed on the first prestressed rock anchor pole（41a）On, rigid casing one（51）Both ends be tightly connected respectively In roll bolt fixed plate（2b）And on connector sleeve (43).

3. the prestressed rock anchor rod foundation of replaceable anchor pole according to claim 2, it is characterised in that：The rigidity Casing one（51）Upper end extends to stepped hole one（21b）Interior, lower end extends to connector sleeve（43）Stepped hole three（431）It is interior.

4. the prestressed rock anchor rod foundation of replaceable anchor pole according to claim 1, it is characterised in that：The anchor bolt （4b）Anchor slab in stretching（2a）Top be cylindric or flat or prism-shaped.

5. a kind of prestressed rock anchor rod foundation based on the replaceable anchor pole of Claims 1-4 any one claim is more Change construction method, which is characterized in that include the following steps；

A, prestressed rock anchor pole will be broken（4a）Top take out；

B, rigid casing one is stretched into using beche（51）The interior prestressed rock anchor pole by fracture（4a）It takes out；

C, from roll bolt fixed plate（2b）Stepped hole one（21b）Place is inserted into new prestressed rock anchor pole（4a）, at top Rotate prestressed rock anchor pole（4a）, its end is made to be screwed into isolating cap one（71）It is interior, then in roll bolt fixed plate（2b）'s The place of top is installed by new gasket and top nut successively（61b）.

6. a kind of prestressed rock anchor rod foundation based on replaceable anchor pole described in Claims 1-4 any one claim Replacement construction method, which is characterized in that include the following steps；

A, prestressed rock anchor pole is detected（4a）Crack conditions, if being found to be prestressed rock anchor pole（4a）Material or other systems Defect causes to be broken, then prepares to replace all unbroken rock-bolt（4a）；

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

C, from roll bolt fixed plate（2b）Stepped hole one（21b）Place is inserted into new prestressed rock anchor pole（4a）, at top Rotate prestressed rock anchor pole（4a）, its end is made to be screwed into isolating cap one（71）It is interior, then in roll bolt fixed plate（2b）'s The place of top is installed by new gasket and top nut successively（61b）.