CN107190744A - A kind of ground anchorage suitable for saturated sand place - Google Patents
A kind of ground anchorage suitable for saturated sand place Download PDFInfo
- Publication number
- CN107190744A CN107190744A CN201710418720.3A CN201710418720A CN107190744A CN 107190744 A CN107190744 A CN 107190744A CN 201710418720 A CN201710418720 A CN 201710418720A CN 107190744 A CN107190744 A CN 107190744A
- Authority
- CN
- China
- Prior art keywords
- drilling rod
- ground anchorage
- saturated sand
- sand place
- drill bit
- 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.)
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Classifications
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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
- E02D5/80—Ground anchors
- E02D5/801—Ground anchors driven by screwing
-
- 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
- E02D5/80—Ground anchors
- E02D5/803—Ground anchors with pivotable anchoring members
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0038—Production methods using an auger, i.e. continuous flight type
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention discloses a kind of ground anchorage suitable for saturated sand place, including drilling rod and drill bit, and the drill bit is arranged on the drilling rod bottom, the drilling rod wall and is evenly arranged multiple permeable holes.The problem of a wide range of liquefaction occurs for earth anchor periphery sand is caused it is an object of the invention to reduce or overcome traditional ground anchorage to produce excessive disturbance during being pierced in saturated sand place as far as possible, permeable hole is provided with the outside of drilling rod, drilling rod disturbs caused excess pore water during burying can penetrate into drilling rod by permeable hole, accelerate its dissipation, so as to reduce the possibility that liquefaction occurs, it is ensured that the extraction-resistant behavior of earth anchor drilling rod.
Description
Technical field
The present invention relates to building traffic engineering apparatus field, and in particular to a kind of earth anchor suitable for saturated sand place is filled
Put.
Background technology
When loose saturated sand soil site is explored or carries out experiment, often it is related to being drilled with for earth anchor counterforce structure.
In traditional soft soil layer, spirally anchor structure is used widely because its is simple in construction.Common hand power screw earth anchor is (such as
Mechanical static penetrometer is equipped with) brill disk footpath generally in more than 25cm, and set for monolithic helical disk, using solid more than drilling rod
Steel anchor rod, weight is larger.
Loose saturated sand soil site carry out cone penetration test and boring extracting soil experiment when find, using it is above-mentioned spirally
The native later stage is anchored into, the soil body substantially weakens to the resistance of drilling rod.The reason for this phenomenon occur is that saturated sand is being bored around drilling rod
Bar buries and liquefied under perturbation action, and soil shear strength almost disappears, and earth anchor pulling capacity in this environment will be by
To obvious weakening.In view of influenceing the principal element of earth anchor pulling capacity to have in saturated sand stratum：By disturbed soil around drilling rod
Body scope, liquefaction possibility occurrence and drilling rod surrounding soil pressure-bearing surface, intend on traditional ground anchor structure device basic, to corresponding structure
Part is improved, so as to obtain the preferable ground anchorage suitable for saturated sand place layer.
Before the present invention, in soft soil layer, previous scholars propose all kinds of ground anchorages, such as two-way expansion
Anchor, screw anchor, umbrella pressure-bearing earth anchor etc..In addition, Chinese patent CN201320034336.0 discloses a kind of with flight
Ground anchor peg, pass through flight improve earth anchor withdrawal resistance.Chinese patent CN201310129938.9 discloses a kind of two-way expansion
Earth anchor, sliding block struts the longitudinal direction of seamless steel pipe and two ends dilatation joint realizes that earth anchor expands.Chinese patent CN201410210998.8
Umbrella pressure-bearing earth anchor recyclable in a kind of soft soil layer is disclosed, anchor is constituted by umbrella frame and by the umbrella cover that fiber cloth is sewed
Bolt, and it is linked to be entirety with stake top reinforced concrete lid fine strain of millet, strengthen the withdrawal resistance performance of earth anchor.However, these are usually used in soft soil layer
Ground anchor structure, it is impossible to solve the problem of disturbance of earth anchor drilling rod produces liquefaction of soil mass in saturated sand stratum.Therefore, need to be to existing
Technology is improved, so as to the various problems that the ground anchorage in comprehensively solve saturated sand place is faced, such as saturated sand
Native liquefaction, extraction-resistant behavior deficiency etc..
In view of drawbacks described above, creator of the present invention obtains of the invention a kind of suitable finally by prolonged research and practice
Ground anchorage for saturated sand place.
The content of the invention
To solve above-mentioned technological deficiency, the technical solution adopted by the present invention is to be applied to saturated sand there is provided one kind
The ground anchorage on ground, including drilling rod and drill bit, the drill bit are arranged on the drilling rod bottom, the wall of the drilling rod and are evenly arranged
There are multiple permeable holes.
Preferably, the permeable hole assumes diamond in shape or quincuncial arrangement, pitch of holes 2-6cm, aperture 0.1-0.2cm.
Preferably, the outer wall of the drilling rod is provided with multistage screw thread disc.
Preferably, the disk footpath of the screw thread disc increases step by step upwards along the drilling rod bottom.
Preferably, the disk footpath of the screw thread disc is 6-10cm.
Preferably, the drill bit includes base and plural pieces flap valve, the flap valve is connected with the base by rotating shaft, institute
State and torsion spring is installed in rotating shaft.
Preferably, the base of the drill bit is latched provided with rotating shaft, the open angle for controlling the flap valve.
Preferably, being provided with water filling film bag in the cavity constituted between the flap valve, the water filling film bag is elliposoidal, its
Foot is not less than the depth after the flap valve opening maximum angle completely after expansion.
Preferably, being provided with the water injection pipe of insertion in the drilling rod, described water injection pipe one end is connected with water filling film bag,
The other end stretches out the drilling rod and is connected with external connecting pipe, and the connecting tube is connected with high-pressure hydraulic pump.
Preferably, being provided with relief valve in the connecting tube.
Preferably, the drilling-rod external wall is provided with Multi-stage rotary neck, the ground anchorage includes being used to rotate the drilling rod
Swingle, the swingle include jaws and multiple swing handles, the jaws shape with it is described rotate neck it is corresponding.
Preferably, the drilling rod top is provided with connecting bolt.
Compared with the prior art the beneficial effects of the present invention are：
1, drilling rod outside of the present invention is provided with permeable hole, and excess pore water caused by disturbance can during drilling rod pierces saturated sand
To penetrate into drilling rod by permeable hole, accelerate its dissipation, so as to reduce the possibility that liquefaction occurs, it is ensured that the resistance to plucking of earth anchor drilling rod
Energy.
2, the monolithic large-diameter thread disc that multistage minor diameter screw thread disc replaces traditional earth anchor is distributed with drilling rod outside,
Drilling rod can at utmost reduce the scope around drilling rod by disturbed soil during burying, drilling rod side cornice has multistage minor diameter spiral shell
Line disc, and disk footpath increases step by step upwards along drilling rod, and the withdrawal resistance loss caused by disc diameter reduces can be reduced as far as possible.
3, drill bit is provided with flap valve and water filling film bag, and flap valve is outwardly opened in water filling film bag expansion process, is formed and is expanded anchor
Head simultaneously promotes flap valve formation support flank, will greatly improve earth anchor extraction-resistant behavior, relief valve, water filling film water-in-bag are opened during unloading
Body is discharged, and flap valve no longer provides support force to upper earthing, facilitates drilling rod rotation extraction.
4, earth anchor and drilling equipment or miscellaneous equipment can be connected by drilling rod top bolt, drilling-rod external wall is provided with multiple rotations
Turn neck, can be manually drilled with according to piercing depth and adjusting swingle position in good time.
5, drilling rod, drill bit, water injection pipe, water filling film bag, connecting tube, high-pressure hydraulic pump, swingle in ground anchorage of the present invention
It is individual member, convenient disassembly is easy to replace, can used cooperatively as needed.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in various embodiments of the present invention, required in being described below to embodiment
The accompanying drawing used is briefly described.
Fig. 1 is the schematic diagram of drill pipe body structure of the present invention；
Fig. 2 is the working state schematic representation of drill bit of the present invention；
Fig. 3 is the structure chart of swingle of the present invention；
Fig. 4 is the overall structure figure of ground anchorage of the present invention.
Numeral is represented in figure：
1. the flap valve of 2. drill bit of the connecting bolt 14. of 11. permeable hole of drilling rod, 12. screw thread disc 13. rotation neck 21.
22. the swingle of 3. 7. high-pressure hydraulic pump of water filling film bag 4. water injection pipe, 5. connecting tube, 6. relief valve of the rotating shaft of base 23. lock 8.
81. the swing handle of jaws 82.
Embodiment
Below in conjunction with accompanying drawing, the forgoing and additional technical features and advantages are described in more detail.
Embodiment one：
As shown in figure 1, a kind of ground anchorage suitable for saturated sand place, including drilling rod 1 and drill bit 2.The main body of drilling rod 1
For hollow cylindrical tube, bottom is provided with drill bit 2.
Multiple permeable holes 11 it have been evenly arranged on the outer wall of drilling rod 1, drilling rod 1, which pierces during saturated sand to disturb, to be caused
Excess pore water can by permeable hole 11 penetrate into drilling rod 1, accelerate drilling rod 1 bury during vibrate caused by excess pore water pressure
Dissipate, reduce the possibility that liquefaction occurs, so as to ensure the extraction-resistant behavior of earth anchor drilling rod.
Three-level screw thread disc 12 is additionally provided with the outer wall of drilling rod 1, the disk footpath of screw thread disc 12 increases step by step upwards along drilling rod 1,
This design can reduce the withdrawal resistance loss caused by disc diameter reduces as far as possible.
The top of drilling rod 1 is provided with connecting bolt 13, for connecting drilling equipment or miscellaneous equipment, facilitates engineering to use.Drilling rod 1
Outer wall rotates neck 14 provided with two-stage, respectively close to the top of drilling rod 1 and middle part, can rotate stress position according to depth adjustment is pierced
Put and be drilled with.
Embodiment two：
The present embodiment is on the basis of above-described embodiment, drilling rod 1 the length 150cm, external diameter 3.4cm.The permeable hole
11 assume diamond in shape or quincuncial arrangement, pitch of holes 2-6cm, aperture 0.1-0.2cm.The permeable set location of aperture 11 and aperture are computed
Obtain, it is ensured that excess pore water enters drilling rod 1, reduce the possibility that liquefaction occurs.
The disk footpath of the screw thread disc 12 is 6-10cm, and the monolithic of traditional earth anchor is replaced by multistage minor diameter screw thread disc 12
Large-diameter thread disc, can at utmost reduce the scope around drilling rod 1 by disturbed soil during drilling rod 1 buries.
The outer wall of drilling rod 1 is provided with Multi-stage rotary neck 14, and every grade of rotation spacing of neck 14 is identical, can be according to piercing depth
Degree adjustment rotates forced position and is drilled with.
Embodiment three：
The present embodiment is on the basis of above-described embodiment, as shown in Fig. 2 the drill bit 2 includes base 22 and plural pieces are lived
Valve 21.The flap valve 21 is connected with base 22 by rotating shaft, and torsion spring is provided with the rotating shaft, and flap valve 21 can be opened with stress,
After external force is removed, flap valve 21 is closed under spring force.The base 22 of drill bit 2 is provided with rotating shaft lock 23, for controlling
The open angle of flap valve 21 is stated, flap valve 21 is opened to spacing by the progress of rotating shaft lock 23 during maximum angle.Between each flap valve 21
Water filling film bag 3 is installed, water filling film bag 3 is connected with the water injection pipe 4 run through in drilling rod 1, and water filling film bag 3 is ellipse in the cavity of composition
Spherical, its lateral length is much larger than vertical extension, is expanded in water filling.
A, b, c are structural representation of the drill bit 2 under different conditions in figure, and a is the closure state of flap valve 21, water filling film in figure
3 non-water fillings of bag, in folded state；B shows that water filling film bag 3 starts dilation by water injection in figure, promotes flap valve 21 to outwardly open；In figure
C flap valves 21 are opened to maximum angle, and water filling film 3 foots of bag are not less than flap valve 21 and are opened to the depth after maximum angle, formed
Flank is supported, earth anchor extraction-resistant behavior is improved.Water body in water filling film bag 3 is discharged during unloading, flap valve 21 is no longer provided upper earthing
Support force, facilitates the rotation extraction of drilling rod 1.
Example IV：
The present embodiment is on the basis of above-described embodiment, and the ground anchorage includes the rotation for being used to rotate the drilling rod 1
Bar 8.As shown in figure 3, the swingle 8 includes jaws 81 and three swing handles 82, the shape of jaws 81 and the outer wall of drilling rod 1
Rotate the correspondence of neck 14.
Carry out artificial be drilled with pseudo-first-order revotating card groove 14 is fixed in the jaws 81 of swingle 8, rotary motion handle
82, drive drilling rod 1 to be drilled with, drilling rod 1 enters underground layer, can adjust the position of swingle 8 in good time according to depth is pierced.
Embodiment five：
The present embodiment is on the basis of above-described embodiment, as shown in figure 4, a kind of earth anchor suitable for saturated sand place is filled
Put, including drilling rod 1, the swingle 8 of drill bit 2 and high pressure water injection system, the high pressure water injection system includes the note being arranged in drill bit 2
Moisture film bag 3, the water injection pipe 4 in drilling rod, independent high-pressure hydraulic pump 7 and for connecting the water injection pipe 4 and high-pressure hydraulic pump
7 connecting tube 5.Relief valve 6 is installed in the connecting tube 5, pressure release is carried out for releasing the water in high pressure water injection system.It is described
The one end of water injection pipe 4 is connected with water filling film bag 3, and the other end stretches out drilling rod 2 and is connected with external connecting pipe 5.Earth anchor dress of the present invention
Drilling rod 1, drill bit 2, water injection pipe 4, water filling film bag 3, connecting tube 5, high-pressure hydraulic pump 7, swingle 8 in putting are individual member, are torn open
Dress is convenient, is easy to replace, can use cooperatively as needed.
It is an object of the invention to reduce or overcome traditional ground anchorage to be produced during being pierced in saturated sand place as far as possible
Give birth to excessive disturbance and cause the problem of a wide range of liquefaction occurs for earth anchor periphery sand.Its specifically used step is：
(1) determine to be drilled with position, after drill bit 2 is positioned, the rotation neck 14 of drilling rod 2 is buckled in using the jaws 81 of swingle 8
Place, operation swing handle 82 is manually drilled with, and neck 14 is rotated according to piercing depth and adjusting the position of swingle 8 in good time to subordinate
Place；
(2) it is drilled to after designated depth, using the water filling into water filling film bag 3 of high-pressure hydraulic pump 7, water filling film bag 3 is expanded against
Flap valve 21 is opened, and is formed and is expanded anchor head, and water filling film 3 volumes of bag and the opening angle of flap valve 21 are controlled according to the water yield of high-pressure hydraulic pump 7
Degree.Drill bit 2, in fan-shaped extension, forms soil-baffling structure in film 8 expansion processes of bag；
(3) drilling rod 1 and miscellaneous equipment are fixed by the top connecting bolt 13 of drilling rod 2, completes ground anchorage and fix；
(4) when unloading, open relief valve 6 and sluiced, the 3 sluicing after-contraction of bag of water filling film, flap valve 21 is under torsion spring effect
Set back, support force is no longer provided upper earthing, drilling rod 1 is extracted in rotation.
Presently preferred embodiments of the present invention is the foregoing is only, is merely illustrative for the purpose of the present invention, and it is non-limiting
's.Those skilled in the art understands, many changes can be carried out to it in the spirit and scope that the claims in the present invention are limited,
Modification, in addition it is equivalent, but fall within protection scope of the present invention.
Claims (10)
1. a kind of ground anchorage suitable for saturated sand place, it is characterised in that including drilling rod and drill bit, the drill bit is installed
Multiple permeable holes have been evenly arranged on the drilling rod bottom, the wall of the drilling rod.
2. it is applied to the ground anchorage in saturated sand place as claimed in claim 1, it is characterised in that the permeable hole is in water chestnut
Shape or quincuncial arrangement, pitch of holes 2-6cm, aperture 0.1-0.2cm.
3. it is applied to the ground anchorage in saturated sand place as claimed in claim 1, it is characterised in that the outer wall of the drilling rod
Provided with multistage screw thread disc, the disk footpath of the screw thread disc is 6-10cm.
4. it is applied to the ground anchorage in saturated sand place as claimed in claim 3, it is characterised in that the screw thread disc
Disk footpath increases step by step upwards along the drilling rod bottom.
5. it is applied to the ground anchorage in saturated sand place as claimed in claim 1, it is characterised in that the drill bit includes bottom
Seat and plural pieces flap valve, the flap valve are connected with the base by rotating shaft, and torsion spring is provided with the rotating shaft.
6. it is applied to the ground anchorage in saturated sand place as claimed in claim 5, it is characterised in that the base of the drill bit
Provided with rotating shaft lock, the open angle for controlling the flap valve.
7. it is applied to the ground anchorage in saturated sand place as claimed in claim 6, it is characterised in that structure between the flap valve
Into cavity in water filling film bag is installed, the water filling film bag is elliposoidal, its completely after expansion foot be not less than the work
Valve is opened to the depth after maximum angle.
8. it is applied to the ground anchorage in saturated sand place as claimed in claim 7, it is characterised in that installed in the drilling rod
There is the water injection pipe of insertion, described water injection pipe one end is connected with water filling film bag, and the other end stretches out the drilling rod and external connection
Pipe is connected, and the connecting tube is connected with high-pressure hydraulic pump.
9. it is applied to the ground anchorage in saturated sand place as claimed in claim 8, it is characterised in that pacify in the connecting tube
Equipped with relief valve.
10. the ground anchorage suitable for saturated sand place as described in claim 1-9 is any, it is characterised in that the brill
Bar outer wall is provided with Multi-stage rotary neck, and the ground anchorage includes the swingle for being used to rotate the drilling rod, the swingle bag
Jaws and multiple swing handles are included, the jaws shape is corresponding with the rotation neck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710418720.3A CN107190744B (en) | 2017-06-06 | 2017-06-06 | A kind of ground anchorage suitable for saturated sand place |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710418720.3A CN107190744B (en) | 2017-06-06 | 2017-06-06 | A kind of ground anchorage suitable for saturated sand place |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107190744A true CN107190744A (en) | 2017-09-22 |
| CN107190744B CN107190744B (en) | 2019-10-29 |
Family
ID=59877144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710418720.3A Active CN107190744B (en) | 2017-06-06 | 2017-06-06 | A kind of ground anchorage suitable for saturated sand place |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107190744B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111055968A (en) * | 2019-12-05 | 2020-04-24 | 天津大学前沿技术研究院有限公司 | Square anchor wing power penetration anchor capable of enhancing in-place bearing capacity |
| CN111055969A (en) * | 2019-12-05 | 2020-04-24 | 天津大学前沿技术研究院有限公司 | Power injection anchor with punching semicircular anchor wing and capable of enhancing in-place bearing capacity |
| CN111721613A (en) * | 2020-06-04 | 2020-09-29 | 河北建筑工程学院 | Wind-blown sand anchor rod drawing test device and test method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2863894Y (en) * | 2006-02-23 | 2007-01-31 | 杨安平 | Valve type pile shoe |
| CN202182830U (en) * | 2011-08-29 | 2012-04-04 | 中国地质科学院水文地质环境地质研究所 | Sandy soil rotary embedding device |
| CN103911992A (en) * | 2014-04-18 | 2014-07-09 | 中南大学 | Balloon-stringed inflating anchor rod |
| CN207512738U (en) * | 2017-06-06 | 2018-06-19 | 宁波市交通建设工程试验检测中心有限公司 | A kind of ground anchorage |
-
2017
- 2017-06-06 CN CN201710418720.3A patent/CN107190744B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2863894Y (en) * | 2006-02-23 | 2007-01-31 | 杨安平 | Valve type pile shoe |
| CN202182830U (en) * | 2011-08-29 | 2012-04-04 | 中国地质科学院水文地质环境地质研究所 | Sandy soil rotary embedding device |
| CN103911992A (en) * | 2014-04-18 | 2014-07-09 | 中南大学 | Balloon-stringed inflating anchor rod |
| CN207512738U (en) * | 2017-06-06 | 2018-06-19 | 宁波市交通建设工程试验检测中心有限公司 | A kind of ground anchorage |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111055968A (en) * | 2019-12-05 | 2020-04-24 | 天津大学前沿技术研究院有限公司 | Square anchor wing power penetration anchor capable of enhancing in-place bearing capacity |
| CN111055969A (en) * | 2019-12-05 | 2020-04-24 | 天津大学前沿技术研究院有限公司 | Power injection anchor with punching semicircular anchor wing and capable of enhancing in-place bearing capacity |
| CN111721613A (en) * | 2020-06-04 | 2020-09-29 | 河北建筑工程学院 | Wind-blown sand anchor rod drawing test device and test method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107190744B (en) | 2019-10-29 |
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