CN105442597B - A kind of autonomous supercharging anchor cable and its construction method - Google Patents
A kind of autonomous supercharging anchor cable and its construction method Download PDFInfo
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- CN105442597B CN105442597B CN201510997718.7A CN201510997718A CN105442597B CN 105442597 B CN105442597 B CN 105442597B CN 201510997718 A CN201510997718 A CN 201510997718A CN 105442597 B CN105442597 B CN 105442597B
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- anchor cable
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- air bag
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Piles And Underground Anchors (AREA)
Abstract
The present invention relates to a kind of autonomous supercharging anchor cable and its construction method, including anchoring section and free segment, some bands are anchored in anchoring section and country rock, freely stretched in free segment, bands is fixed on aperture by anchorage；Grouting Pipe is arranged in parallel with the bands, and the bands and Grouting Pipe pass through some limiting cards in anchoring section, and air bag is provided between the anchorage and aperture.The present invention solves such engineering anchoring section and does not reach the problem of design load etc. causes support system unstable failure with prestressing force during slopes sliding prestressed failure, or anchorage cable stretching by installing limiting card；By a piece polyethylene pipe by gauze wrapped whole body blossom type perforations adding of insertion laying in the middle part of anchor cable, realize hydrostatic in slopes and press to dynamic hydraulic pressure conversion；It can realize that prestressd anchor cable dynamic and intelligentization applies by installing air bag between anchorage and slopes, while air bag also alleviates the flash disruption of impact load and earthquake load to supporting construction.
Description
Technical field
Increase the autonomous supercharging dynamic drainage anchor cable of resistance and its construction method with multistage the present invention relates to a kind of side slope protection, especially
It is related to a kind of suitable strong-weathered rock matter or soil property high gradient slope, the autonomous increasing of one kind of area marine stratum Extra-Deep Foundation Pit
Anchor cable and its construction method are pressed, belongs to engineering support field.
Background technology
Prestressed anchor reinforcement technology as a kind of bearing capacity for effectively improving Rock And Soil and stability reinforcement measure
Confirmed by many engineering practices.Prestress anchorage cable adjusts and improved ground because can fully play the self-supporting potentiality of ground
Self-strength and self-stable ability, mitigate the deadweight of supporting construction, save engineering material, and can guarantee that the safety and stablization of construction,
With significant economic and social profit, it is widely used in Geotechnical Engineering.It is either to increase to west in recent years
The dynamics of portion's exploitation, or alleviate urban traffic pressure and the city underground just like a raging fire built, such as many Underground Transportation Engineerings
Slope retaining problem will be faced；But prestress anchorage cable coordinates concrete frame beam, steel I-beam etc. as such work of reinforcing
The common technology means of journey.
Western China is many mountainous terrains, builds the high gradient slope that high-speed railway, highway be frequently necessary to along and enters
Row is reinforced；China coast city underground and building for skyscraper are frequently necessary to excavate the foundation ditch as deep as tens of meters simultaneously, together
Sample faces going along with sb. to guard him for crater wall, is facing this severely-weathered or soil property high gradient slope, area marine stratum Deep Foundation Pit Supporting Engineering
When, original anchor cable and injecting cement paste frictional force are smaller or construction disturbance often faces anchoring section cable body and led with injecting cement paste sliding
Not situations such as prestressing force does not reach design load during cause prestressed failure, or anchorage cable stretching so that engineering safety can not be obtained
It is effective to ensure.
At present, traditional anchor cable has the disadvantages that：
1st, disposable prestressed stretch-draw can only be realized, when prestressing force does not reach the situation of design load, or prestressing force damage is run into
During mistake, it is impossible to carry out two times tensioning to supplement application prestressing force；
2nd, it can not accomplish effectively to dredge for reinforcing the hydrostatic in country rock body, hydrostatic pressure gradually increases and caused in reinforcing body
The unstable failure of country rock body；
3rd, the frictional force between injecting cement paste and anchor cable is limited, the restrictive factor as anchorage cable anchoring power, so as to cause anchor
The anchor force of rope does not reach design load.
The content of the invention
The purpose of the present invention is a kind of with being applied to strong-weathered rock matter or soil property high gradient slope, area marine layer depth of design
The autonomous supercharging anchor cable of one kind and its construction method of foundation pit enclosure, the anchor cable have the function being independently pressurized；It is simultaneously specific to be situated between
Continued the concrete construction method of this kind of anchor cable, solves such engineering anchoring section cable body and slides prestressed failure with reinforcing body, or
Prestressing force does not reach the problem of design load etc. causes support system unstable failure during anchorage cable stretching.
To achieve the above object, the design uses following scheme：A kind of autonomous supercharging anchor cable, including anchoring section and freedom
Section, some bands are anchored in anchoring section and country rock, are freely stretched in free segment, bands is fixed on aperture by anchorage；Grouting Pipe
It is arranged in parallel with the bands, the bands and Grouting Pipe pass through some limiting cards in anchoring section, in the anchorage and aperture
Between be provided with air bag.
Anchor cable is provided with air bag between drilling orifice and anchorage, by can be realized at any time to airbag aeration, air bag expansion
The autonomous supercharging of prestressd anchor cable.
The air bag is provided with the charging connector to inflate, and the hole passed through to anchor cable, the air bag are provided with center
Reach that design pressure is demarcated；Geotextiles are provided between the air bag and the drilling orifice.
It is separated by setting spacing between limiting card described in adjacent two；If the periphery of the limiting card is provided with the outside of country rock
Dry barb.
By laying barb on the limiting card of anchoring section, realize that the multistage of anchor cable increases resistance function, add bands and note
Frictional force between slurry, overcomes the drawbacks of reinforcing country rock with anchor cable friction using injecting cement paste merely.
The anchor cable also includes the drainpipe laid along the anchor cable length direction, if the hole wall of the drainpipe is provided with
Dry inlet opening, the limiting card is provided with the hole passed through to the drainpipe.
The whole body of the inlet opening along the drainpipe is in quincuncial arrangement；Wrap up to prevent on the whole body of the drainpipe
The injecting cement paste blocks the permeability flexible material of the inlet opening.
Drainpipe is set inside anchor cable, the hydrostatic in Rock And Soil can be drawn along drainpipe, even if the installation of cable body
Obliquely, the as elevation angle can also realize the discharge of the water under high pressure to being gathered in reinforcing body, reach the work of dynamic drainage pressure release at inclination angle
With.
The anchor cable also includes the blast pipe laid along the anchor cable length direction, the length of the blast pipe and the anchor cable
Degree is equal.
Lay blast pipe, when being easy to slip casting in hole gas exclusion, in order to avoid gas can not be excluded during because of slip casting, cause slip casting
Leakiness.
The limiting card is provided with to supply each bands, the Grouting Pipe, the drainpipe and the exhaust respectively
Pipe through fixing hole.
Each bands is fixed in the fixing hole by fixture through the limiting card；The cross sectional shape of the fixture
For annular, the periphery of the fixture is stuck in the fixing hole, and inner circumferential clamps the bands.
The fixture includes some wedge-shaped sections of jurisdiction radially spliced, and the wedge-shaped section of jurisdiction is provided with groove, the groove
On be cased with rubber ring to fixed some wedge-shaped sections of jurisdiction.
Multistage increases the construction method of the autonomous supercharging dynamic drainage anchor cable of resistance, comprises the following steps：
Step 1：Assembled anchor cable, assembled some bands and limiting card, fixed Grouting Pipe, blast pipe and drainpipe；
Step 2：The assembled good anchor cable is placed in anchor cable hole, first slip casting is carried out；
Step 3：When first injecting cement paste intensity reaches the first setting value in hole, secondary grouting is carried out；
Step 4：When injecting cement paste reaches the second setting value, air bag, anchorage and anchor cable fixture are installed in drilling orifice successively；
Step 5：Pressurizeed by charging connector to airbag aeration, apply prestressing force to anchor cable until design load.
The beneficial effects of the invention are as follows：
1) by installing limiting card, the drawbacks of reinforcing slopes with anchor cable hole wall friction using injecting cement paste merely, solution are overcome
Prestressing force does not reach design load etc. during such engineering anchoring section and the slopes of having determined sliding prestressed failure, or anchorage cable stretching
The problem of causing support system unstable failure；
2) by a piece polyethylene pipe by gauze wrapped whole body blossom type perforations adding of insertion laying in the middle part of anchor cable, realizing
Hydrostatic presses to dynamic hydraulic pressure conversion in slopes；
3) it can realize that prestressd anchor cable dynamic and intelligentization applies by installing air bag between anchorage and slopes, while gas
Capsule also alleviates the flash disruption of impact load and earthquake load to supporting construction.
Brief description of the drawings
Fig. 1 is the overall structure diagram -1 of apparatus of the present invention embodiment one；
Fig. 2 is the limiting clamp structure schematic diagram -2 of apparatus of the present invention embodiment one；
Fig. 3 is the fixture detail drawing of the corresponding diagram 2 of apparatus of the present invention；
Fig. 4 is the drainpipe schematic diagram of the corresponding diagram 1 of apparatus of the present invention；
Fig. 5 is the air bag schematic diagram of the corresponding diagram 1 of apparatus of the present invention.
Wherein, 1- barbs, 2- bands, 3- Grouting Pipes, 4- blast pipes, 5- drainpipes, 6- limiting cards, 7- connecting shafts, 8- rows
Water hole, 9- air bags, 10- charging connectors, 11- geotextiles, 12- rubber rings, 13- wedge shapes section of jurisdiction, 14- anchorages, 15- fixtures.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
Apparatus of the present invention mainly include barb 1, bands 2, Grouting Pipe 3, blast pipe 4, drainpipe 5, limiting card 6, connecting shaft
7, osculum 8, air bag 9, charging connector 10, geotextiles 11, rubber ring 12, wedge-shaped section of jurisdiction 13, anchorage 14, fixture 15；It is wherein described
Bands 2, Grouting Pipe 3, blast pipe 4, drainpipe 5 both pass through the fixing hole of limiting card 6, wherein being fixed per beam bands by fixture 15
In limiting card 6；4 barbs 1 are uniformly fixed on limiting card 6 by the ring of connecting shaft 7, and barb 1 can be rotated within the specific limits；
Geotextiles 10 are laid between slopes and air bag 9, in case air bag 9 is destroyed by rubble etc..
Anchor cable is divided into free segment and anchoring section；The ring of limiting card 6 is evenly arranged four barbs 1, and barb 1 passes through connecting shaft 7
It is connected, can rotates within the specific limits with limiting card 6；Barb is wedge-shaped barb, and its root is designed for inclined plane, passes through connecting shaft
7 with the spacing of limiting card and the pitch angle control of barb root inclined plane, realize that barb freely opens in the range of 0o-30o.Anchor
In the borehole, barb can produce friction to rope with borehole wall, and then barb is kept what is opened in the state of injecting cement paste consolidation
State.
Free segment bands outsourcing bellows, the extension to realize free end bands 2 completes prestressed apply；In the middle part of anchor cable
Piece Grouting Pipe 3 of insertion, a blast pipe 4 and a drainpipe 5, the drainpipe whole body are drilled with quincunx osculum 8, and the pipe whole body is used
Crocus cloth is wrapped up, and osculum 8 is blocked to prevent slurry；One autonomous pressurised airbag 9 is installed between anchor cable and anchorage 14, passes through air bag
9 pressurizations can carry out prestressed application and supplement with dynamic realtime to anchor cable, prevent reinforcing body surface irregularity or sharp
Rubble etc. causes breakage to air bag, and flexible material geotextiles 11 are laid between air bag and broken body.
Level increases the autonomous supercharging dynamic drainage New Anchor Cable of resistance and its installation method, further to its operating method with reference to accompanying drawing
Illustrate：
1 determines free section of anchor cable and anchoring depth, on-site consolidation bands 2 and limiting card 6 according to design, and fixed
Grouting Pipe 3, blast pipe 4 and drainpipe 5；Anchor cable termination can be wrapped up with high tenacity polyethylene cloth, conveniently be put into anchor cable hole；
2) side slope field working conditions or excavation of foundation pit order are combined, assembled good anchor cable is put into the anchor cable constructed in advance
In hole, first low-pressure grouting (0.3~0.5MPa of pressure) is carried out；
3) when slurry intensity reaches 70% in hole, secondary high-pressure slip-casting (1.5~2MPa of pressure) is carried out；
4) when slurry intensity reaches 100% in hole, slope surface lays one layer of geotextiles 10, and air bag is then installed successively
9, anchorage 14, anchor cable fixture, four sphenoid sections of jurisdiction that fixture is fixed by rubber ring are constituted.Its stream line fixture and fixture 15
Structure is identical；
5) according to design requirement, give the airbag aeration for having completed pressure calibration to be classified by charging connector 10 and pressurize, to anchor
Rope applies Prestressing until design load.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
A variety of modifications to embodiment will be apparent for those skilled in the art, as defined herein general
Principle can be realized in other embodiments without departing from the spirit or scope of the present invention, is not described in detail
Part, be prior art, herein without repeating.Therefore, the present invention is not intended to be limited to these implementations shown in this article
Example, and it is to fit to the most wide scope consistent with feature with principles disclosed herein.
Claims (6)
1. a kind of autonomous supercharging anchor cable, including anchoring section and free segment, some bands are anchored in anchoring section and country rock, in free segment
Freely stretch, bands is fixed on aperture by anchorage；It is characterized in that：Grouting Pipe is arranged in parallel with the bands, the bands
Some limiting cards are passed through in anchoring section with Grouting Pipe, air bag is provided between the anchorage and aperture；
The air bag is provided with the charging connector to inflate, and the hole passed through to anchor cable is provided with center, and the air bag reaches
Design pressure is demarcated；Geotextiles are provided between the air bag and the aperture；It is separated by between limiting card described in adjacent two between setting
Away from；The periphery of the limiting card is provided with some barbs on the outside of country rock；Barb is connected by connecting shaft with limiting card, can be
Rotated in certain limit；Barb is wedge-shaped barb, and its root is designed for inclined plane, by the spacing of connecting shaft and limiting card and
The pitch angle control of barb root inclined plane, realizes that barb freely opens in the range of 0 ° -30 °；
The anchor cable also includes the drainpipe laid along the anchor cable length direction, the hole wall of the drainpipe provided with it is some enter
Water hole, the limiting card is provided with the hole passed through to the drainpipe；The whole body of the inlet opening along the drainpipe is in
Quincuncial arrangement；The whole body parcel of the drainpipe is to prevent the injecting cement paste from blocking the permeability flexible material of the inlet opening
Material.
2. a kind of autonomous supercharging anchor cable according to claim 1, it is characterised in that：The anchor cable is also included along the anchor cable
The blast pipe that length direction is laid, the equal length of the blast pipe and the anchor cable.
3. the autonomous supercharging anchor cable of one kind according to claim 1-2, it is characterised in that：The limiting card is provided with to divide
Gong not the fixing hole that passes through of each line member.
4. a kind of autonomous supercharging anchor cable according to claim 3, it is characterised in that：Each bands passes through institute by fixture
Limiting card is stated to be fixed in the fixing hole；The cross sectional shape of the fixture is annular, and the periphery of the fixture is stuck in described solid
Determine in hole, inner circumferential clamps the bands.
5. a kind of autonomous supercharging anchor cable according to claim 4, it is characterised in that：The fixture includes what is radially spliced
Some wedge-shaped sections of jurisdiction, the wedge-shaped section of jurisdiction is provided with the rubber being cased with groove, the groove to fixed some wedge-shaped sections of jurisdiction
Circle.
6. a kind of construction method according to any described autonomous supercharging anchor cables of claim 1-5, comprises the following steps：
Step 1：Assembled anchor cable, assembled some bands and limiting card, fixed Grouting Pipe, blast pipe and drainpipe；
Step 2：The assembled good anchor cable is placed in anchor cable hole, first slip casting is carried out；
Step 3：When first injecting cement paste intensity reaches the first setting value in hole, secondary grouting is carried out；
Step 4：When injecting cement paste reaches the second setting value, air bag, anchorage and anchor cable fixture are installed in drilling orifice successively；
Step 5：Pressurizeed by charging connector to airbag aeration, apply prestressing force to anchor cable until design load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510997718.7A CN105442597B (en) | 2015-12-25 | 2015-12-25 | A kind of autonomous supercharging anchor cable and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510997718.7A CN105442597B (en) | 2015-12-25 | 2015-12-25 | A kind of autonomous supercharging anchor cable and its construction method |
Publications (2)
| Publication Number | Publication Date |
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| CN105442597A CN105442597A (en) | 2016-03-30 |
| CN105442597B true CN105442597B (en) | 2017-10-13 |
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| CN201510997718.7A Active CN105442597B (en) | 2015-12-25 | 2015-12-25 | A kind of autonomous supercharging anchor cable and its construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107975039B (en) * | 2017-10-31 | 2019-03-26 | 中国水利水电科学研究院 | A kind of adjustable anchoring body anchor force dead load device of stretching force |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0841872A (en) * | 1994-08-03 | 1996-02-13 | Nittoc Constr Co Ltd | Anchorage device for anchoring front end of anchor |
| CN201206094Y (en) * | 2008-01-31 | 2009-03-11 | 陈祐寰 | Pneumatic jack structure |
| CN201296899Y (en) * | 2008-06-16 | 2009-08-26 | 江阴法尔胜住电新材料有限公司 | Anti-corrosive structure of anchor device |
| WO2012012392A2 (en) * | 2010-07-19 | 2012-01-26 | Illinois Tool Works Inc. | Anchoring device |
| CN104963339B (en) * | 2015-07-07 | 2017-08-11 | 长江勘测规划设计研究有限责任公司 | A kind of anchor cable centering holder device |
| CN205314100U (en) * | 2015-12-25 | 2016-06-15 | 中铁十四局集团第二工程有限公司 | Autonomic pressure boost anchor rope |
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| CN105442597A (en) | 2016-03-30 |
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