CN203962011U - A kind of rock bolt of segmentation anchoring - Google Patents

A kind of rock bolt of segmentation anchoring Download PDF

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Publication number
CN203962011U
CN203962011U CN201420379684.6U CN201420379684U CN203962011U CN 203962011 U CN203962011 U CN 203962011U CN 201420379684 U CN201420379684 U CN 201420379684U CN 203962011 U CN203962011 U CN 203962011U
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China
Prior art keywords
rock
rod
bolt
anchor
anchoring
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Active
Application number
CN201420379684.6U
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Chinese (zh)
Inventor
涂鹏
胡育林
张国祥
冯树荣
吴文平
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Powerchina Zhongnan Engineering Corp Ltd
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Powerchina Zhongnan Engineering Corp Ltd
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Priority to CN201420379684.6U priority Critical patent/CN203962011U/en
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Abstract

The utility model discloses a kind of rock bolt of segmentation anchoring.In the rock mass of high-ground stress and developmental joint fissure, due to the moderate finite deformation of rock burst effect or rock, make anchor pole global failure, rock mass loses the effect of supporting and produces cave in accident, and the rock bolt of described segmentation anchoring comprises the body of rod; The described body of rod is provided with multistage external screw thread; At body of rod afterbody, be bolted with at least one bottom nut, on all the other external thread sections of the body of rod, be bolted with a plurality of for being placed in the anchor bolt in different jointed rock mass.Anchor pole of the present utility model, under the effect of country rock load, can produce certain deflection, is unlikely to again to cause the destruction of anchor pole.

Description

A kind of rock bolt of segmentation anchoring
Technical field
The utility model relates to a kind of rock bolt of segmentation anchoring, be specially a kind of in the underground constructions such as tunnel and underground cavern in order to top and side wall supports to be provided and to prevent the rock bolt of rock landslide.
Background technology
In the geotechnical engineering that relates to deep rock mass excavation, for example, in underground construction, mining engineering, for preventing that stratum deformation from caving in or unstability jeopardizes safety, a kind of main support technology that stratum is reinforced is bolt anchorage.The high-strength tensile ability having by the anchor pole being arranged in stratum, and by modes such as closely knit combinations between the injecting cement paste around anchor pole and anchor pole and stratum, stratum consolidation is got up.
Along with the continuous intensification of mining depth, geostatic stress increases, geological conditions deterioration causes supporting difficulty to strengthen, so anchor-holding force of anchor bolt requires increasing.In order to prevent anchor pole damage inactivation, mainly at following three aspects:, take measures: the one, increase the adhesion stress between the body of rod and Anchor Agent, the 2nd, increase the adhesion stress between Anchor Agent and rock mass, the 3rd, increase anchor pole self intensity, as the body of rod, nut and pallet intensity, and strengthen correlative protection measure.
Above measure can be received certain effect for the rock mass of processing certain depth, but still can cause anchor pole damage inactivation for the huge deep rock mass of rock mass stress.The main cause that anchor pole lost efficacy is, High strength bolt by injecting paste material and rock mass in conjunction with as a whole acting in conjunction.Under huge rock mass stress effect, anchor pole cannot bear excessive load, thereby causes that deflection is excessive is pulled off inefficacy.In addition, traditional anchor pole is all the form that adopts 2 anchorings, and the longitudinal deformation amount of anchor pole is very little, cannot tackle larger rock deformation.In order to solve the rock anchorage problem of high-ground stress and developmental joint fissure, must improve the performance of anchor pole.Improve on the one hand anchor-holding force of anchor bolt, existing method mainly comprises that the body of rod adopts screw-thread steel, the termination point of anchor rod design of improvement etc.; On the other hand, adopt the form of multi-point-anchoring, between anchor point, allow anchor bar body to produce certain deflection, thereby prevent anchor pole global failure.
Utility model content
In the rock mass of high-ground stress and developmental joint fissure, moderate finite deformation due to rock burst effect or rock, make anchor pole global failure, rock mass loses the effect of supporting and produces cave in accident, the utility model aims to provide a kind of rock bolt that bears the segmentation anchoring of moderate finite deformation, this anchor pole, under the effect of country rock load, can produce certain deflection, is unlikely to again to cause the destruction of anchor pole.
To achieve these goals, the technical scheme that the utility model adopts is:
A rock bolt for segmentation anchoring, comprises the body of rod; Its design feature is that the described body of rod is provided with multistage external screw thread; At body of rod afterbody, be bolted with at least one bottom nut, on all the other external thread sections of the body of rod, be bolted with a plurality of for being placed in the anchor bolt in different jointed rock mass.
Be below the technical scheme of further improvement of the utility model:
Spacing between adjacent two anchor bolts equates.
Described anchor bolt integral body is tapered.
Be close to described bottom nut and be provided with at least a slice backing plate or the packing ring being sleeved on the body of rod.
Anchor pole section external surface between adjacent two anchor bolts is provided with adherent layer.
The periphery of described anchor bolt has a plurality of projections.
Adjacent two anchor bolts are placed in respectively in adjacent two jointed rock mass.
By said structure, on the surface of the body of rod afterbody certain length scope of anchor pole, be provided with external screw thread.Threaded portion setting has a nut at least and has a backing plate or packing ring at least.On the body of rod, every certain length, be provided with external screw thread and anchoring cone solid.Anchoring body combines by the external screw thread on internal thread and anchor pole.The anchoring body of anchor pole and male thread portion intensity are very high, are not easy to produce deformation and failure.The external diameter of anchoring body is greater than the diameter of the body of rod, is anchored in different jointed rock mass.Anchoring body is divided into the some sections of sections that can be out of shape by anchor rod body.Shank portion intensity between anchoring body is lower than anchoring body part, can local elongation under load action, thus the local distortion of restriction rock.
Compared with prior art, the beneficial effects of the utility model are: anchor pole of the present utility model can produce moderate finite deformation to improve anchored force under high stress, under the effect of country rock load, can produce certain deflection, be unlikely to again to cause the destruction of anchor pole.
Below in conjunction with drawings and Examples, the utility model is further elaborated.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of an embodiment of the utility model;
Fig. 2 is A-A sectional view of Fig. 1;
Fig. 3 is B-B sectional view of Fig. 1;
Fig. 4 is C-C sectional view of Fig. 3.
In the drawings
1-anchor rod body; 2-external screw thread; 3-bottom nut; 4-backing plate or packing ring; 5-anchor bolt; 6-internal thread.
The specific embodiment
A rock bolt for segmentation anchoring, in conjunction with Fig. 1 to Fig. 3, comprises anchor rod body 1, external screw thread 2, bottom nut 3, backing plate 4, and several anchor bolts 5 that arrange in bolt body.Above-mentioned bolt body is solid plain steel-bar.Above-mentioned anchor bolt is arranged in bolt body, and its quantity and spacing be free setting as required.The transformable segments surface of anchor pole scribbles immersion coating or grease, prevents that the body of rod and injecting paste material are sticked together.While applying at the scene, bolt body adopts the form of segmentation anchoring, is full of injecting paste material in boring.Owing to having increased anchor bolt, anchor pole can produce moderate finite deformation to improve anchored force under high stress, and can not destroy.
The content that above-described embodiment is illustrated should be understood to these embodiment only for being illustrated more clearly in the utility model, and be not used in restriction scope of the present utility model, after having read the utility model, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present utility model.

Claims (7)

1. a rock bolt for segmentation anchoring, comprises the body of rod (1); It is characterized in that, the described body of rod (1) is provided with multistage external screw thread (2); At the body of rod (1) afterbody, be bolted with at least one bottom nut (3), on all the other external thread sections of the body of rod (1), be bolted with a plurality of for being placed in the anchor bolt (5) in different jointed rock mass.
2. the rock bolt of segmentation anchoring according to claim 1, is characterized in that, the spacing between adjacent two anchor bolts (5) equates.
3. the rock bolt of segmentation anchoring according to claim 1, is characterized in that, described anchor bolt (5) is whole tapered.
4. the rock bolt of segmentation anchoring according to claim 1, is characterized in that, is close to described bottom nut (3) and is provided with at least a slice backing plate or the packing ring (4) being sleeved on the body of rod (1).
5. the rock bolt of segmentation anchoring according to claim 1 and 2, is characterized in that, the anchor pole section external surface between adjacent two anchor bolts (5) is provided with adherent layer.
6. according to the rock bolt of the segmentation anchoring one of claim 1 ~ 3 Suo Shu, it is characterized in that, the periphery of described anchor bolt (5) has a plurality of projections.
7. the rock bolt of segmentation anchoring according to claim 1 and 2, is characterized in that, adjacent two anchor bolts (5) are placed in respectively in adjacent two jointed rock mass.
CN201420379684.6U 2014-07-10 2014-07-10 A kind of rock bolt of segmentation anchoring Active CN203962011U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420379684.6U CN203962011U (en) 2014-07-10 2014-07-10 A kind of rock bolt of segmentation anchoring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420379684.6U CN203962011U (en) 2014-07-10 2014-07-10 A kind of rock bolt of segmentation anchoring

Publications (1)

Publication Number Publication Date
CN203962011U true CN203962011U (en) 2014-11-26

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104061010A (en) * 2014-07-10 2014-09-24 中国电建集团中南勘测设计研究院有限公司 Rock anchor rod capable of conducting segmented anchoring
CN105422153A (en) * 2015-12-29 2016-03-23 湖南大学 Segmented anchoring anchor rod used for reinforcing regionally-disintegrated surrounding rocks of roadways
CN107725088A (en) * 2017-11-01 2018-02-23 中国科学院武汉岩土力学研究所 A kind of anti-rock burst and large deformation wing formula splitting type energy-absorption anchor rod and structure
CN110469354A (en) * 2019-08-30 2019-11-19 东北大学 A kind of anti-pulling anchor pole for country rock micro seismic monitoring

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104061010A (en) * 2014-07-10 2014-09-24 中国电建集团中南勘测设计研究院有限公司 Rock anchor rod capable of conducting segmented anchoring
CN105422153A (en) * 2015-12-29 2016-03-23 湖南大学 Segmented anchoring anchor rod used for reinforcing regionally-disintegrated surrounding rocks of roadways
CN105422153B (en) * 2015-12-29 2017-12-19 湖南大学 A kind of segmentation anchoring bolt reinforced for zonal fracturing roadway surrounding rock
CN107725088A (en) * 2017-11-01 2018-02-23 中国科学院武汉岩土力学研究所 A kind of anti-rock burst and large deformation wing formula splitting type energy-absorption anchor rod and structure
CN110469354A (en) * 2019-08-30 2019-11-19 东北大学 A kind of anti-pulling anchor pole for country rock micro seismic monitoring

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