CN201924356U - Detachable anchor rod - Google Patents

Detachable anchor rod Download PDF

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Publication number
CN201924356U
CN201924356U CN2010206943637U CN201020694363U CN201924356U CN 201924356 U CN201924356 U CN 201924356U CN 2010206943637 U CN2010206943637 U CN 2010206943637U CN 201020694363 U CN201020694363 U CN 201020694363U CN 201924356 U CN201924356 U CN 201924356U
Authority
CN
China
Prior art keywords
detachable
anchor
adapter sleeve
bar
permanent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2010206943637U
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Chinese (zh)
Inventor
项小珍
王勇
吕志平
吴航通
沈立恭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HANGZHOU DODRIVE ENGINEERING MATERIALS Ltd
Original Assignee
HANGZHOU DODRIVE ENGINEERING MATERIALS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HANGZHOU DODRIVE ENGINEERING MATERIALS Ltd filed Critical HANGZHOU DODRIVE ENGINEERING MATERIALS Ltd
Priority to CN2010206943637U priority Critical patent/CN201924356U/en
Application granted granted Critical
Publication of CN201924356U publication Critical patent/CN201924356U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a detachable anchor rod which comprises an anchor rod body, a base plate and nuts, the anchor rod body comprises a detachable section and a permanent inner anchoring section which are directly connected or connected by a connecting sleeve, and the detachable section is detachably connected with the permanent inner anchoring section or the connecting sleeve; the base plate and the nuts are sleeved on the detachable section in a penetrating way, an isolated protecting sleeve pipe for completely coating the part of the detachable section is sleeved on the anchor rod body in a penetrating way, wherein the part of the detachable section is positioned at one side of the base plate deviating from the nuts, one end of the isolated protecting sleeve pipe is matched with the base plate, and the other end of the isolated protecting sleeve pipe is connected with the connecting sleeve or the permanent inner anchoring section in a sealing way. The detachable section of the anchor rod body sleeved with the base plate is isolated from a grouting body by the isolated protecting sleeve pipe (the anchor rod body is also provided with a syrup stopping plug in a hollow state), after the anchor rod is anchored, all parts outside the anchor rod body can be removed, the permanent inner anchoring section is reserved and fully bonded with peripheral surrounding rock, pressing stress is delivered to a peripheral bottom layer, therefore, the stratum of the detachable section can be excavated.

Description

A kind of detachable anchor pole
Technical field
The utility model relates to geotechnical engineering anchoring support technical field, is a kind of detachable anchor pole.
Background technology
In underground construction, mining engineering, foundation ditch and the slope project process that geotechnical engineering relates to, for preventing that stratum deformation from caving in or unstability jeopardizes safety, a kind of main support technology that the stratum is reinforced is to adopt anchor pole.By be arranged on anchor pole had in the stratum high strength resistance to tension and by closely knit mode such as combine between anchor pole and injecting cement paste around the anchor pole and the stratum with stratum consolidation, with the globality on raising stratum.With the control stratum deformation, make it to reach the stability and safety state.The development of this technology is existing century-old history, and proposes multiple bolt support type and technology to adapt to the different stratum and the needs of different condition.
With regard to the anchor pole type, can be divided into substantially:
Rigidity by anchor bar body can be divided into: make the bar reinforcement anchor pole (Bar anchor) of the body of rod and make Anchor cable-rod (strand anchor) the two big classes of the body of rod with flexible high-strength steel hank knotting with reinforcing bar or steel pipe.The multi beam type anchor pole (mult-strand anchor) that Anchor cable-rod is generally formed with many steel hank knottings based on prestressing force, because construction is complicated, requires high to plant equipment.Be applicable to that generally anchored force has greater than 500KN, the stratum that length 10m is above.And the bar reinforcement anchor-holding force of anchor bolt generally uses less than 500KN, and the machinery that is adopted is simple, easy construction, so be to use maximum anchor poles at present, be widely used in middle-size and small-size anchoring need the stratum supporting in.As traffic tunnel, water conservancy and hydropower tunnel, mining tunnel, general foundation ditch and slope retaining.
Can be divided into grouted anchor bar and non-grouted anchor bar by the anchoring type; Can be divided into non-prestressed anchor pole and prestressed anchor by the prestressing force mode; Can be divided into mechanical. points anchor formula and full bond-anchorage type by the prestress anchoraging segmented mode; Free section by prestressed anchor can be divided non-binding type prestressed anchor and binding type prestressed anchor; Can be divided into solid anchor pole and hollow (hollow) anchor pole by body of rod shape; Can be divided into automatic anchor pole and non-automatic anchor pole by the mode of creeping into.
Above-mentioned anchor pole generally all is used in the total length supporting or the reinforcing aspect of stratum or works, promptly an anchor pole total length is all brought into play the effect of supporting power, and the disengaging section parts just can not be realized mass action as excision exterior portion anchor bar body or weaken its effect or cause anchor pole not reuse and cause waste.
In actual engineering, some engineering will stage by stage or be implemented step by step just and can finish.In the underground ground foundation pit construction of for example newly-built building, periphery have near the old building thing exist can not be influenced, need the layering step excavation in melt pit side slope near old building, need squeeze into 8 meters long anchor pole integral reinforcings as analyzing after deliberation, progressively 3 meters webbing slopes of explosion excision influence old building thing ground to reduce again, anchor pole also needs 3 meters of same excisions like this, keeps 5 meters long anchor poles and bring into play long term in side slope.For example the rock tunnel section is too little again, needs enlarging, need be extended to 12 meters as 7 meters wide caverns.Abutment wall need excavate 2.5 meters, and analyze needing to reinforce earlier rock mass after deliberation, squeeze into 7 meters of radial system anchor poles in the cavern long, and row progressively is excavated to design section again, and 2.5 meters long of the also corresponding excisions of anchor pole keep 4.5 meters long anchor poles and bring into play long term in cavern's rock mass.Do not exist behind the disengaging section in the prior art and reusable anchor pole.
Summary of the invention
The utility model discloses a kind of detachable anchor pole, this anchor pole can need the geotechnical engineering of Integratively supporting again to needing step excavation, before step excavation, carry out disposable support reinforcement stratum, and with the process of step excavation, the part anchor bar body of dismounting respective length, the part that keeps long-term supporting works on, the part of dismounting is reusable, easy construction, cost is low, and is safe and reliable.
A kind of detachable anchor pole, comprise anchor bar body, backing plate and nut, described anchor bar body comprises direct connection or detachable section and permanent interior anchor section connecting by adapter sleeve, detachable section with forever between anchoring section or the adapter sleeve for removably connecting, described backing plate and nut are set on detachable section, described anchor bar body upper sleeve through has and is positioned at the insulated jacket pipe that part that backing plate deviates from nut one side is wrapped quilt fully with detachable section, insulated jacket Guan Yiduan cooperates with backing plate, and the other end and adapter sleeve or permanent interior anchor section are tightly connected.
When being two sections, described detachable section with permanent in the anchor section be preferably and be threaded or clamping, simple in structure, be easy to processing and manufacturing.
When this anchor pole is grouted anchor bar, and described anchor bar body is a hollow, detachable section is provided with stop grouting plug with permanent interior anchor section junction, when needing boring slip casting downwards, one Grouting Pipe penetrates the anchor bar body inner chamber and passes stop grouting plug from nearly aperture one end, and when needing up-hole slip casting, Grouting Pipe is only passed backing plate and reached the aperture, from upwards overflowing to the anchoring terminal position at the bottom of the hole, the hollow bolt cavity is as the exhaust passage by slurries.
When being three sections, described anchor bar body by detachable section, adapter sleeve and permanent in the anchor section be preferably and be threaded.
When this anchor pole was grouted anchor bar, described anchor bar body was a hollow, was provided with stop grouting plug in the adapter sleeve, and when needing boring slip casting downwards, a Grouting Pipe penetrates the anchor bar body inner chamber and passes stop grouting plug from nearly aperture one end.When needing up-hole slip casting, a Grouting Pipe is only passed backing plate and is reached the aperture, and the hollow bolt cavity is as the exhaust passage, and detachable section has interior pipe (former Grouting Pipe).
Preferably, described insulated jacket pipe is threaded or interference fit with adapter sleeve, and is simple in structure, is easy to processing and fabricating.
Preferably, described adapter sleeve connects insulated jacket Guan Yiduan and radially dwindles formation one linkage section, and the junction external diameter of adapter sleeve and insulated jacket pipe can not undergone mutation, and is convenient to slip casting.
Preferably, described insulated jacket pipe is the PVC pipe, and material is easy to get, and is cheap, easy to assembly.
When this anchor pole is grouted anchor bar, and anchor bar body is local or all solid, and a Grouting Pipe or stack pass backing plate and extend to anchorage head.When needing boring slip casting downwards, a Grouting Pipe is passed backing plate and is extended to the anchor bar body end, and stack only passes backing plate and reaches the aperture; When needing up-hole slip casting, a stack passes backing plate and extends to the anchor bar body end, and Grouting Pipe is only passed backing plate and reached the aperture.
The utility model anchor pole is by detachable section and the injecting cement paste isolation of insulated jacket pipe (also having stop grouting plug during anchor bar body hollow) with the anchor bar body of sheathed backing plate, after anchoring is finished, all parts in this section anchor bar body outside can be removed, keep permanent anchoring section, the omnidistance bonding of this part and peripheral rock, compressive stress is passed to peripheral bottom, therefore can excavate detachable section stratum.
Description of drawings
Fig. 1 is the structural representation of the utility model anchor pole;
Fig. 2 is the structural representation of anchor bar body in the utility model anchor pole;
Fig. 3 is the explosive view of anchor bar body shown in Figure 2;
Fig. 4 is an anchor pole installation structural representation shown in Figure 1;
Fig. 5 is the anchor pole installation structural representation with solid anchor bar body.
The specific embodiment
As shown in Figure 1, a kind of anchor pole, comprise and the anchorage head 2 of anchor bar body 1, anchor bar body front end, the backing plate 3 and the nut 4 of anchor bar body tail end, anchorage head 2 can be selected for use as Chinese patent 200310108547.5 disclosed expansion shell type anchoring heads, also can select the anchorage head of other types for use, anchorage head perhaps is not set.What present embodiment adopted is expansion shell type anchoring head.Backing plate 3 forms the block shape to deviating from anchorage head 2 one sides depression.Nut 4 and anchor bar body 1 tail end threaded engagement.
Anchor bar body 1 comprise permanent anchoring section 11, detachable section 12, connect the adapter sleeve 13 of permanent anchoring section 11 and detachable section 12 and be enclosed within backing plate 3 and adapter sleeve 13 between detachable section 12 on insulated jacket pipe 14, between insulated jacket pipe 14 and the detachable section 12 certain interval is arranged preferably, be convenient to dismounting.Adapter sleeve 13 connects insulated jacket Guan Yiduan and radially dwindles formation linkage section 131, this linkage section 131 and insulated jacket pipe 14 interference fit, can certainly be to be threaded, must guarantee sealing, so can guarantee detachable section 12 and injecting cement paste isolation, reduce the slip casting resistance simultaneously, the other end and backing plate 3 are sealed and matched.
Detachable section and permanent anchoring section also can be directly by being threaded or clamping, as long as satisfy the insulated jacket pipe will detachable section be positioned at part between backing plate and the anchorage head wrap fully by, thereby with it and injecting cement paste isolation.
Detachable section 12 and permanent anchoring section 11 outer walls are equipped with screw thread in the present embodiment, they also are to rely on screw thread and adapter sleeve 13 inwalls to be connected, wherein permanent anchoring section 11 also is to be connected with anchorage head 2 by screw thread, and it is partial screw threads that detachable certainly section 12 and permanent anchoring section 11 outer walls can be selected.Detachable section 12 and permanent anchoring section 11 can be diversified with the connected mode of adapter sleeve 13, as clamping etc., but need to guarantee that between detachable section 12 and the adapter sleeve 13 be dismountable.Insulated jacket pipe 14 can be made by the PVC pipe, also can be made by other material.
When anchor bar body 1 when being hollow, above-mentioned anchor pole construction method of installation is as follows:
1, with rig boring downwards and cleaning boring 100 in stratum (rock stratum);
2, hollow detachable section 12 and permanent anchoring section 11 are connected the two ends of adapter sleeve 13, and insulated jacket pipe 14 is connected by linkage section 131 with adapter sleeve 13, and forever the anchoring section head connects anchorage head 12, finishes the assembling of anchor bar body 1;
3, Grouting Pipe 5 stretches in its cavity and passes the stop grouting plug 6 of adapter sleeve 13 from anchor bar body 1 tail end, and stretches into permanent anchoring section 11 slightly, and stop grouting plug 6 cooperates with adapter sleeve 13 inner wall sealings, guarantees that slip casting can not flow in detachable section 12 the cavity.When anchor bar body is two-part, then stop grouting plug is placed on the junction of permanent anchoring section and detachable section.
4, as shown in Figure 4, the whole insertion in the boring 100 adopts the mode of impacting rotation to make the expansion shell type anchoring head spreading at the anchor bar body tail end, and backing plate 3 and nut 4 are enclosed within the tail end of anchor bar body 1.Scar is close in backing plate 3 inboards, by torque spanner locking nut 4, anchor pole is applied prestressing force.
5, anchor pole is carried out slip casting, the gap between Grouting Pipe 5, anchor bar body 1 inner chamber, anchorage head 2 grout outlets, anchor pole and the boring 100 forms the slip casting passage, and a stack passes backing plate 3, finishes slip casting by slip casting passage and stack.
6, etc. after injecting cement paste reaches the fixed length of time, remove nut 5, backing plate 4 and detachable section 12, because injecting cement paste is fixed, the omnidistance bonding of anchorage head, permanent anchoring section and adapter sleeve and peripheral rock, compressive stress is passed to peripheral bottom, therefore the stratum that can excavate outer anchor section.
7, when to rock stratum up-hole (as the tunnel), Grouting Pipe is passed backing plate in bottom slip casting, is provided with stop grouting plug equally in permanent anchoring section and the adapter sleeve, and body of rod cavity is as the exhaust passage, and all the other steps as mentioned above.
When anchor bar body is whole or local when solid, construction method of installation is as follows:
1, with rig boring downwards and cleaning boring 101 in stratum (rock stratum);
2, solid detachable section 12 and permanent anchoring section 11 are connected the two ends of adapter sleeve 13, and insulated jacket pipe 14 is connected by linkage section 131 with adapter sleeve 13, and forever the anchoring section head connects anchorage head 12, finishes the assembling of anchor bar body 1;
3, as shown in Figure 5, the whole insertion in the boring 101 adopts the mode of impacting rotation to make the expansion shell type anchoring head spreading at the anchor bar body tail end, and backing plate 3 and nut 4 are enclosed within the tail end of anchor bar body 1.Scar is close in backing plate 3 inboards, by torque spanner locking nut 4, anchor pole is applied prestressing force.
4, Grouting Pipe 30 is passed backing plate, stretch into boring 101 and extend to the bottom, and attached on the anchor pole, a stack passes backing plate, finishes slip casting by the gap between Grouting Pipe, anchor pole and the boring, stack.
5, etc. after injecting cement paste reaches the fixed length of time, remove nut 5, backing plate 4 and detachable section 12, because injecting cement paste is fixed, the omnidistance bonding of anchorage head, permanent anchoring section and adapter sleeve and peripheral rock, compressive stress is passed to peripheral bottom, therefore the stratum that can excavate outer anchor section.
6, when to rock stratum up-hole (as the tunnel), Grouting Pipe is passed backing plate in bottom slip casting, and stack passes backing plate and extends to anchorage head, and all the other steps as mentioned above.
Certainly anchor pole can carry out anchoring by early strong anchoring agent, can only install the anchoring agent in the anchorage head installation position, so just can save anchorage head, still there is prestressing force in anchor pole, can omnidistancely use the anchoring agent, this moment, anchor pole did not have prestressing force, but can omit parts such as stop grouting plug and Grouting Pipe yet.

Claims (10)

1. detachable anchor pole, comprise anchor bar body, backing plate and nut, it is characterized in that: described anchor bar body comprises direct connection or detachable section and permanent interior anchor section connecting by adapter sleeve, detachable section with forever between anchoring section or the adapter sleeve for removably connecting, described backing plate and nut are set on detachable section, described anchor bar body upper sleeve through has and is positioned at the insulated jacket pipe that part that backing plate deviates from nut one side is wrapped quilt fully with detachable section, insulated jacket Guan Yiduan cooperates with backing plate, and the other end and adapter sleeve or permanent interior anchor section are tightly connected.
2. detachable anchor pole according to claim 1 is characterized in that, described detachable section with permanent in anchor section clamping or be threaded.
3. detachable anchor pole according to claim 2 is characterized in that, described anchor bar body is a hollow, and detachable section is provided with stop grouting plug with permanent interior anchor section junction inner chamber, and a Grouting Pipe penetrates the anchor bar body inner chamber and passes stop grouting plug from nearly aperture one end.
4. detachable anchor pole according to claim 1 is characterized in that, described anchor bar body by detachable section, adapter sleeve and permanent in the anchor section be threaded.
5. detachable anchor pole according to claim 4 is characterized in that: described anchor bar body is a hollow, and the adapter sleeve inner chamber is provided with stop grouting plug, and a Grouting Pipe penetrates the anchor bar body inner chamber and passes stop grouting plug from nearly aperture one end.
6. according to claim 1 or 4 described detachable anchor poles, it is characterized in that: described insulated jacket pipe is threaded or interference fit with adapter sleeve.
7. the detachable anchor pole of stating according to claim 6 is characterized in that, described adapter sleeve connects insulated jacket Guan Yiduan and radially dwindles formation one linkage section.
8. according to claim 1,2 or 4 described detachable anchor poles, it is characterized in that described insulated jacket pipe is the PVC pipe.
9. according to claim 1,2 or 4 described detachable anchor poles, it is characterized in that described anchor bar body is local or all solid, a Grouting Pipe or stack pass backing plate and extend to the anchor bar body end.
10. detachable anchor pole according to claim 1 is characterized in that: described anchor bar body is provided with anchorage head away from nut one end.
CN2010206943637U 2010-12-31 2010-12-31 Detachable anchor rod Expired - Lifetime CN201924356U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010206943637U CN201924356U (en) 2010-12-31 2010-12-31 Detachable anchor rod

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Application Number Priority Date Filing Date Title
CN2010206943637U CN201924356U (en) 2010-12-31 2010-12-31 Detachable anchor rod

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102051880A (en) * 2010-12-31 2011-05-11 杭州图强工程材料有限公司 Detachable anchor
CN102587367A (en) * 2012-04-10 2012-07-18 中冶建筑研究总院有限公司 Mechanical connection type anchor rod
CN103122633A (en) * 2013-02-19 2013-05-29 中冶集团武汉勘察研究院有限公司 Electric smelting type pressure type recyclable anchor rod technology
CN103233470A (en) * 2013-04-18 2013-08-07 河海大学 Recyclable anchor rod system for reinforcing joint surfaces of rocky slopes and mounting method of recyclable anchor rod system
CN104153365A (en) * 2013-05-15 2014-11-19 青岛天力建筑加固工程有限公司 Self-locking anchor rod head
WO2019186109A1 (en) * 2018-03-28 2019-10-03 Highway Care Ltd Anchor system and method of use thereof
CN111608708A (en) * 2020-04-21 2020-09-01 中交四公局第一工程有限公司 Device for expanding, digging and pre-reinforcing lateral surrounding rock of tunnel

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102051880A (en) * 2010-12-31 2011-05-11 杭州图强工程材料有限公司 Detachable anchor
CN102051880B (en) * 2010-12-31 2012-07-18 杭州图强工程材料有限公司 Detachable anchor
CN102587367A (en) * 2012-04-10 2012-07-18 中冶建筑研究总院有限公司 Mechanical connection type anchor rod
CN103122633A (en) * 2013-02-19 2013-05-29 中冶集团武汉勘察研究院有限公司 Electric smelting type pressure type recyclable anchor rod technology
CN103122633B (en) * 2013-02-19 2015-08-19 中冶集团武汉勘察研究院有限公司 Electric-melting pressure-type recoverable anchor rod construction method
CN103233470A (en) * 2013-04-18 2013-08-07 河海大学 Recyclable anchor rod system for reinforcing joint surfaces of rocky slopes and mounting method of recyclable anchor rod system
CN104153365A (en) * 2013-05-15 2014-11-19 青岛天力建筑加固工程有限公司 Self-locking anchor rod head
WO2019186109A1 (en) * 2018-03-28 2019-10-03 Highway Care Ltd Anchor system and method of use thereof
CN111608708A (en) * 2020-04-21 2020-09-01 中交四公局第一工程有限公司 Device for expanding, digging and pre-reinforcing lateral surrounding rock of tunnel

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C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20110810

Effective date of abandoning: 20120718