CN100404788C - Flexible injection anchor rod - Google Patents
Flexible injection anchor rod Download PDFInfo
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- CN100404788C CN100404788C CNB2003101055253A CN200310105525A CN100404788C CN 100404788 C CN100404788 C CN 100404788C CN B2003101055253 A CNB2003101055253 A CN B2003101055253A CN 200310105525 A CN200310105525 A CN 200310105525A CN 100404788 C CN100404788 C CN 100404788C
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- injection
- anchor rod
- way valve
- anchor
- elasticity
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Abstract
The present invention relates to the technical field of a support facility in rock and soil and mine engineering, particularly to a flexible injection anchor rod. In the present invention, macromolecular materials with high elasticity are used as the materials of a main body of the anchor rod, and an anchor rod body is manufactured into a hollow structure. The hollow part is used as a liquid (gas) filling chamber, wherein one end of the liquid (gas) filling chamber is closed, and the other end is tightly provided with an injection one-way valve. The anchor rod body is formed by the strengthening compound of steel wires or fibrous materials and the macromolecular materials with high elasticity, and the injection one-way valve is made of rigid materials or elastic materials. When the flexible injection anchor rod is used for construction, the anchor rod liquid (gas) filling chamber is filled with high-pressure liquid or gas with set pressure, and the anchor rod body generates radial expansion force to force the anchor rod to be anchored firmly with an anchor hole. With convenient construction and installation, the flexible injection anchor rod can automatically compensate the change of the anchor hole due to the displacement of rock formation, and the anchoring is reliable. The pressure change in the anchor rod body can be monitored on-line, and the pressure can be replenished in time. The anchor rod body is easy for recycle.
Description
Technical field
The present invention relates to ground and mine engineering supporting facility technical field, especially a kind of flexible pressurized grouting bolt.
Background technology
In mining processes such as ground, tunnel and coal, bolt support is the Surrounding Rock Control Technology that has support concurrently and reinforce two kinds of effects, compares with frame set to have remarkable economic efficiency, has obtained in countries in the world widely and has used.China's bolt support technology has obtained very big progress through 40 years of researches exploration and practices.
The action principle of anchor pole, form of structure and material therefor are various, can be divided into end anchorage anchor pole and full length fastening anchor pole on action principle.
To the full length fastening anchor pole, be divided into resin anchor, cement grouted bolt and cement-sodium silicate anchor pole etc. according to the difference of anchoring bonding agent.The difference that adds mode according to the anchoring bonding agent is divided into common grouted anchor bar and hollow grouting anchor again.The work progress of full length fastening bolt support roughly is divided into boring-cleaning anchor hole-injection bonding agent-lay anchor pole-anchoring; Or boring-cleaning anchor hole-lay hollow bolt-injection bonding agent-anchoring.If above-mentioned steps is lumped together, promptly anchor pole also is a drilling rod simultaneously, then is called self-feeding anchor pile or self-advancing type hollow grouting anchor (also claiming to step the formula anchor pole).Be divided into slit-tube anchor pole, left hand thread steel anchor rod and bidirectional screw anchor pole etc. by anchor pole self structure characteristics.At present, the anchor pole material therefor has steel, glass fiber reinforced plastic and plastics etc.In recent years, also occur anchor pole is applied prestressed high-performance pretension anchor pole.Existing full length fastening anchor pole material therefor all is rigid materials, and the rock stratum of it and institute's anchoring is filled by all kinds of cementing agents and bonded together.Mainly there is following shortcoming in this class anchor pole: 1, construction and installation complexity, long construction period; 2, the kinetic anchor hole that can't compensate the rock stratum changes, supporting problem that especially can not the more soft more weak country rock of fine solution; 3, anchor pole is difficult for reclaiming.
For termination anchor pole (or anchor cable) is to expand by the end of anchor pole or anchor cable, and anchor pole is fastened on the rock stratum, deep, and the anchoring rock stratum mainly is suspended on the hard rock stratum by supporting plate.There is following shortcoming in the end anchorage anchor pole: 1, the anchorage effect power of anchor pole is single, in case tension force inadequately just can slippage, very easily causes anchor rod anchored inefficacy; 2, anchor pole can't reclaim.
Summary of the invention
The objective of the invention is in order to solve the various shortcomings that existing bolt support facility exists, invent a kind of construction install convenience, can compensate anchor hole that strata displacement causes automatically and change and can not cause anchor pole loosening, the reliable and flexible pressurized grouting bolt that is easy to reclaim of anchored force.
Basic design of the present invention is: adopt the high resiliency macromolecular material as the anchor pole material of main part, anchor bar body is made hollow structure, hollow parts is fluid injection or gas injection chamber, its end one end sealing, end close installation injection one way valve; Anchor bar body is strengthened with steel wire or fibrous material and high resiliency macromolecular material and is composited.The injection one way valve is made with rigid material or elastomeric material.
Effect:
1, flexible pressurized grouting bolt structure is anchor bar body is expanded and to be combined in securely in the anchor hole by injecting highly pressurised liquid or gas, has saved the injecting glue bonding process, has simplified construction technology;
2, under highly pressurised liquid or gas effect, the anchor pole of expanded radially produces sufficient pressure to anchor hole, consequent frictional force can be with anchor pole and anchor hole anchoring securely, simultaneously, the anchor bar body expanded radially has also produced pressure to the rock stratum, compress softer rock stratum, can adapt to the Anchor Care requirement in tunnel, tunnel, played initiatively anchorage effect;
3, because the anchor pole main body is to be made by the high-strength elastic material, and filled highly pressurised liquid or gas when anchor hole during with rock displacement generation varying aperture, can be easy to carry out self-compensating, and it is loosening and lost efficacy that anchor pole can not take place, and can realize safe and reliable Anchor Care effect;
4, anchor pole time spent not can discharge highly pressurised liquid in the cavity or gas, and anchor bar body dwindles, and is convenient to recycle;
5, the injection one way valve on the anchor pole can connect measuring instrument, and the pressure in the on-line monitoring anchor bar body changes, and in time supplementary pressure guarantees that anchor pole is anchored at anchor hole all the time securely.
Description of drawings
Fig. 1 is for installing the flexible pressurized grouting bolt structural representation of rigidity injection one way valve;
Fig. 2 is the structural representation of rigidity injection one way valve;
Fig. 3 is for installing the flexible pressurized grouting bolt structural representation of elasticity injection one way valve;
Fig. 4 is the structural representation of elasticity injection one way valve;
Fig. 5 is for installing the anchor pole agent structure schematic diagram of rigidity injection one way valve band plug;
Fig. 6 is for installing the anchor pole agent structure schematic diagram of elasticity injection one way valve band plug.
Be described in detail by reference to the accompanying drawings structure of the present invention, such as Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, shown in Figure 6:
1 is the anchor pole main body of making of the high resiliency macromolecular material, and 1-1 is steel wire or single shaped material, and 2 are fluid injection or gas injection chamber, Anchor pole main body 1 one ends open wide and are used for installing injection check valve 3a or 3b, other end sealing, and the method for sealing is for adopting high resiliency Macromolecular material body and plug are made of one, or close installation plug 5 consists of on body, plug 5 be metal material, The high-strength engineering plastics of macromolecular material or hard are made. The injection check valve is to make of metal material or the high-strength engineering plastics of hard Rigidity injection check valve 3a, the elasticity injection check valve 3b that perhaps makes of the high resiliency macromolecular material.
As shown in Figure 2, rigidity injection check valve 3a is by valve seat 3a-1, spool 3a-2, spring 3a-3, " O " shape sealing ring 3a-4 Form with back-up ring 3a-5; Filling gun connecting thread 3a-1-1 and interface 3a-1-2 are arranged on the valve seat 3a-1; Spool 3a-2 is installed in valve In the seat 3a-1 hole, " O " shape sealing ring 3a-4 is installed between the two; Spool 3a-2 back mounting spring 3a-3, back-up ring 3a-5 is pressed in On the spring 3a-3, and be installed in the cannelure of valve seat 3a-1.
As shown in Figure 4, fastening being installed in the elasticity anchor bar body 1 of rigidity injection check valve 3a, outside cuff 4, the cuff 4 of installing Upper mooring anchor fixed network supporting plate 4-1. Anchored net supporting plate 4-1 according to the construction needs, can do greatly also can do little.
Elasticity injection check valve 3b is chewed 3b-3 and is consisted of by interface 3b-1, pin hole 3b-2, sealing; Elasticity injection check valve 3b with Elasticity anchor bar body 1 is by swelling, fastening or be installed together with adhering method with cuff 4, or is made of one.
The specific embodiment
Be described in detail implementation process of the present invention in conjunction with the accompanying drawings, as Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, shown in Figure 6:
(1) the flexible pressurized grouting bolt implementation process that rigidity is injected one way valve is installed
The anchor pole main body 1 of the flexible pressurized grouting bolt of rigidity injection one way valve is installed, and is to select highly-elastic urethane employing moulding by casting or extruding-out process or select the elastomeric material mould pressing process, processes with the steel wire or the compound reinforcement of fibrous material of surface through specially treated.During with the polyurethane material castable, at first process casting mold before the cast by shape shown in Figure 1, mold cavity block adopts openable pair of subdivision structure, and the former two ends are provided with reinforcement composite steel wire locating hole or fibrous material is strained the hole, are convenient to the location of compound reinforcement steel wire or fiber; The cast back that finishes is extracted core (formpiston) out and is opened former and can be shaped.When adopting the polyurethane material extrusion molding, the extrusion die die orifice is provided with compound reinforcement steel wire or fibrous material location leadout hole, when extruding polyurethane material, steel wire or fiber be compound extruding synchronously, form the steel wire or the compound reinforcement anchor pole of the fibrous material main body of tubulose, length as required is cut into pieces the tubular bolt main body of extruding then.
As shown in Figure 2, anchor pole main body one end that shapes is installed rigidity injection one way valve 3a, and the other end is for the end of the anchor pole main body 1 pourable one-tenth sealing of castable; For the tubular body of extrusion molding, make the anchor pole main body as Fig. 5 or the plug 5 of on tubular body, installing shown in Figure 6.Rigidity injection one way valve 3a removes " O " RunddichtringO 3a-4 for the high resiliency macromolecular material makes, and other is the high-strength engineering plastics making of metal or hard.Hoop cover 4 and sealing plug 5 adopt metal sheet roof covering drawing or cast moldings, and hoop cover 4 is made of one with welding or punching press with anchoring net planker 4-1, its size by construction need to do big, can do little, can be zero.
(2) the flexible pressurized grouting bolt implementation process that elasticity is injected one way valve is installed
As shown in Figure 4, elasticity injection one way valve 3b adopts polyurethane material cast or mold pressing, or adopts the rubber mold pressing to form.Elasticity injection one way valve [3b] combines with elasticity anchor bar body [1], by swelling, to overlap [4] fastening or be installed together with the bonding agent adhering method with binding round, or is made of one.
Flexible pressurized grouting bolt application implementation process:
1,, and clears up with the drilling rod system of on the position, rock stratum of required arrangement anchor pole, the boring anchor hole slightly thicker than anchor pole.
When 2, using the flexible pressurized grouting bolt that rigidity injection one way valve is housed, the interface 3-1-2 that the joint and the anchor pole of rigidity fast injection rifle are injected on the one way valve is connected, and the connecting thread 3a-1-1 that connects on screw and the anchor pole injection one way valve screws; When the flexible pressurized grouting bolt of elasticity injection one way valve was equipped with in application, then the joint with elasticity fast injection rifle injected its interface 3b-1, and entry needle inserts pin hole 3b-2 and gets final product.Filling gun links to each other with high pressure liquid pump or air compressor system by high-voltage tube.Need protect rock layer surface by the holder of anchoring holder net, then anchoring holder net be propped up and aligned, be close to rock layer surface; The anchor pole that anchor pole, filling gun and pressure system are connected as a single entity passes anchoring holder net and settles and put into anchor hole; To not needing anchoring holder net holder to protect rock layer surface, then the anchor pole that directly anchor pole, filling gun and pressure system is connected as a single entity is settled and is put into anchor hole.
3, need protect the rock stratum external surface by the holder of anchoring net for implementing, anchor pole is made should attach anchoring net supporting plate 4-1, it neglects the rigidity of anchoring net greatly and the density of anchor pole dispensing is determined, soft rare of anchoring net with anchor pole dispensing, it is more bigger that anchoring net supporting plate 4-1 should make, on the contrary can be a little bit smaller.For protect the rock stratum external surface by whitewashing holder, then anchor pole can not attach anchoring net supporting plate 4-1.
4, after anchor pole is settled and finished, open the filling gun valve, to the highly pressurised liquid or the gas of fluid injection or gas injection chamber 2 injection setting pressures.Notes are turned on the connecting screw on the joint or are extracted entry needle after pressing and finishing, and take off filling gun then.This operation is very simple and quick, the efficiency of construction height.
5, anchor bar body produces expanded radially under the effect of the highly pressurised liquid of setting pressure or gas, exerts pressure to holding in the palm the rock stratum of protecting, and combines securely with anchor hole.This pressure provides compaction to more soft loose rock stratum again simultaneously, has improved the Anchor Care effect.
6, because flexible pressurized grouting bolt has sufficiently high expansion force, can follow the tracks of the variation of compensation anchor hole, anchoring is reliable, has avoided traditional anchor pole often to lose efficacy and the situation of needs benefit anchor.
7, as required, the joint of pressure monitoring instrument or remote pressure monitoring system is linked to each other with the injection one way valve as connecting filling gun, can realize the operating pressure of flexible pressurized grouting bolt is carried out on-line monitoring, the timely supplementary pressure of the anchor pole of insufficient pressure.
8, need the flexible pressurized grouting bolt of recovery to finishing using, can back down the spool 3a-2 of rigidity injection one way valve or chew 3b-3, drain liquid or gas in fluid injection or the gas injection chamber 2 by the pressure release wrench with the sealing of pressure release pin break-through elasticity injection one way valve; The volume-diminished of anchor bar body can be extracted recycling easily out.
Above-mentioned every flexible pressurized grouting bolt performance detects by test and shows and can reach designing requirement fully.
Claims (6)
1. flexible pressurized grouting bolt is characterized by and adopts the high resiliency macromolecular material as the anchor pole material of main part, and anchor bar body is made hollow structure, and hollow parts is fluid injection or gas injection chamber, its end one end sealing, end close installation injection one way valve; Anchor bar body is strengthened with steel wire or fibrous material and high resiliency macromolecular material and is composited.
2. flexible pressurized grouting bolt according to claim 1 is characterized by the rigidity injection one way valve [3a] of described injection one way valve for making of metal material or the high-strength engineering plastics of hard, perhaps the elasticity injection one way valve of making of macromolecular material [3b].
3. flexible pressurized grouting bolt according to claim 2 is characterized by described rigidity injection one way valve [3a] and is made up of valve seat [3a-1], spool [3a-2], spring [3a-3], " O " shape sealing ring [3a-4], back-up ring [3a-5]; Filling gun connecting thread [3a-1-1] and interface [3a-1-2] are arranged on the valve seat [3a-1]; Spool [3a-2] is installed in valve seat [3a-1] hole, and " O " shape sealing ring [3a-4] is installed between the two; Spool [3a-2] back mounting spring [3a-3], back-up ring [3a-5] is pressed on the spring [3a-3], and is installed in the cannelure of valve seat [3a-1].
4. flexible pressurized grouting bolt according to claim 2, it is characterized by described elasticity injection one way valve [3b] is to chew [3b-3] by interface [3b-1], pin hole [3b-2], sealing to constitute.
5. flexible pressurized grouting bolt according to claim 2 is characterized by fastening being installed in the elasticity anchor bar body [1] of described rigidity injection one way valve [3a], the outside hoop cover [4] of installing; Elasticity injection one way valve [3b] and elasticity anchor bar body [1] by swelling, to overlap [4] with hoop fastening or be installed together with adhering method, or be made of one.
6. flexible pressurized grouting bolt according to claim 5 is characterized by described hoop cover [4] and goes up mooring anchor fixed network supporting plate [4-1].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101055253A CN100404788C (en) | 2003-11-19 | 2003-11-19 | Flexible injection anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101055253A CN100404788C (en) | 2003-11-19 | 2003-11-19 | Flexible injection anchor rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1619106A CN1619106A (en) | 2005-05-25 |
| CN100404788C true CN100404788C (en) | 2008-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101055253A Expired - Fee Related CN100404788C (en) | 2003-11-19 | 2003-11-19 | Flexible injection anchor rod |
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| Country | Link |
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| CN (1) | CN100404788C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086159B (en) * | 2006-06-07 | 2010-08-25 | 山东大学 | Annular extension limit flexible pressurized grouting bolt |
| CN101126321B (en) * | 2006-08-18 | 2010-04-21 | 山东大学 | Expansion anchor rod |
| CN102936895A (en) * | 2012-10-30 | 2013-02-20 | 浙江工业大学 | Inflatable recyclable anchor rod |
| CN116815830B (en) * | 2023-07-12 | 2024-03-08 | 安阳市高新建筑有限责任公司 | Underground engineering foundation anti-floating method and system based on two-way force system construction |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2054078U (en) * | 1989-06-29 | 1990-03-07 | 王继良 | Rock anchoring-bolt |
| WO1991015656A1 (en) * | 1990-04-11 | 1991-10-17 | Bergwerksverband Gmbh | Injection bore anchor with conveyor screw |
| GB2262147A (en) * | 1991-12-03 | 1993-06-09 | Willich F Berg Bautechnik | A cable bolt for stabilising rock strata |
| CN2138192Y (en) * | 1992-05-08 | 1993-07-14 | 于凯 | Flexible anchor pin with expansible shell |
| DE4202926A1 (en) * | 1992-02-01 | 1993-08-12 | Willich F Berg Bautechnik | Flexible expanding tube for packing boreholes - comprises esp. flexible cross section and is covered with narrow mesh expanding wire netting |
| CN2144712Y (en) * | 1992-09-24 | 1993-10-27 | 西安矿业学院 | Tooth shape expansive plastic anchoring-bolt |
| CN2737949Y (en) * | 2003-11-19 | 2005-11-02 | 山东省岩土与结构工程技术研究中心 | Flexiable injection rockbolt |
-
2003
- 2003-11-19 CN CNB2003101055253A patent/CN100404788C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2054078U (en) * | 1989-06-29 | 1990-03-07 | 王继良 | Rock anchoring-bolt |
| WO1991015656A1 (en) * | 1990-04-11 | 1991-10-17 | Bergwerksverband Gmbh | Injection bore anchor with conveyor screw |
| GB2262147A (en) * | 1991-12-03 | 1993-06-09 | Willich F Berg Bautechnik | A cable bolt for stabilising rock strata |
| DE4202926A1 (en) * | 1992-02-01 | 1993-08-12 | Willich F Berg Bautechnik | Flexible expanding tube for packing boreholes - comprises esp. flexible cross section and is covered with narrow mesh expanding wire netting |
| CN2138192Y (en) * | 1992-05-08 | 1993-07-14 | 于凯 | Flexible anchor pin with expansible shell |
| CN2144712Y (en) * | 1992-09-24 | 1993-10-27 | 西安矿业学院 | Tooth shape expansive plastic anchoring-bolt |
| CN2737949Y (en) * | 2003-11-19 | 2005-11-02 | 山东省岩土与结构工程技术研究中心 | Flexiable injection rockbolt |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1619106A (en) | 2005-05-25 |
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