CN108316297A - A kind of tubular type soil nailing and its construction method - Google Patents
A kind of tubular type soil nailing and its construction method Download PDFInfo
- Publication number
- CN108316297A CN108316297A CN201810174260.9A CN201810174260A CN108316297A CN 108316297 A CN108316297 A CN 108316297A CN 201810174260 A CN201810174260 A CN 201810174260A CN 108316297 A CN108316297 A CN 108316297A
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- Prior art keywords
- steel pipe
- slip casting
- flower
- open end
- casing
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- 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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- 239000002689 soil Substances 0.000 title claims abstract description 71
- 238000010276 construction Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 120
- 239000010959 steel Substances 0.000 claims abstract description 120
- 238000007569 slipcasting Methods 0.000 claims abstract description 47
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 239000004567 concrete Substances 0.000 claims description 15
- 239000011378 shotcrete Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 230000015271 coagulation Effects 0.000 claims description 4
- 238000005345 coagulation Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 abstract description 4
- 238000007596 consolidation process Methods 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 239000004927 clay Substances 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention relates to a kind of tubular type soil nailing and its construction methods.Tubular type soil nailing includes flower steel pipe and anchor structure, and described colored steel pipe one end is taper bit, and the other end is open end, open end is equipped with screw thread, flower steel pipe tube surfaces are equipped with slurry outlet, and flower steel pipe tube wall is welded with spiral steel rib, and the spiral steel rib is close to taper bit；When slip casing by pressure, slip casting casing one end is connect with flower steel pipe open end, and the other end is flexible coupling with slip casting；After the completion of slip casing by pressure, slip casting casing is removed, anchor structure is installed in flower steel pipe open end.Steel pipe of the present invention directly pierces the soil body, avoids bored grouting when soft soft clay area is constructed, the problems such as collapse hole, burying and necking down occurs.The soil body is entered using mechanical rotary drilling, reduces steel pipe and buries the loss of difficulty and steel pipe during burying, accelerate construction progress；The flower steel pipe periphery soil body that spiral steel rib makes becomes loose, and in slip casing by pressure, slurry and the soil body composite consolidation body of formation are relatively large in diameter, and improves pulling capacity of soil nail power.
Description
Technical field
The invention belongs to geotechnical engineering fields, and in particular to a kind of tubular type soil nailing and its construction method.
Background technology
In the geotechnical anchor engineerings such as foundation pit, side slope, being widely used for soil nailing is general.Traditional soil nailing generally uses reinforcing bar soil nailing
With steel pipe type soil nailing, the work progress of reinforcing bar soil nailing needs advance machine drilling, should be use up after pore-forming to prevent collapse hole phenomenon
It is fast to be inserted into the reinforcing bar body of rod, while reinforcing bar needs that certain measure is taken to be located at hole center, and reinforcing bar is made to play a role completely,
After soil nailing is inserted into, injection mortar makes soil nailing and soil body build-in.This plate brad supporting form, in the softer area of some soil properties, example
Such as, backfill, soft muck soil, liquefiable sandy soil etc., this plate brad supporting form, are generally difficult to form stable brill
Easily there is the problems such as collapse hole, burying and necking down during machine drilling in hole.Existing steel pipe type soil nailing (206646502 U of CN)
And novel driving into type soil nailing (204849758 U of CN) is all made of and mechanically squeezes into mode, and steel is easily caused in the process squeezing into ram
Pipe squeezes into position damage, while the steel pipe periphery soil body is compressed during squeezing into, and causes mortar to soil body penetration difficulty, it is difficult to protect
Card forms uniform puddled soil complex, and the slurry and soil body composite consolidation body diameter that are formed are smaller, and soil nailing quality can not ensure,
Cause pulling capacity of soil nail power relatively low.
Invention content
The present invention provides a kind of the tubular type soil nailing and its construction method of the formation of steel pipe high-pressure slip-casting.Using Novel spiral steel rib
Flower steel pipe reduces steel pipe and buries the damage of difficulty and steel pipe during burying convenient for using mechanical system that steel pipe is screwed in the soil body
Consumption, steel tube head damages when avoiding squeezing into steel pipe using traditional approach；Spiral steel rib can make steel pipe during piercing simultaneously
The periphery soil body is loose, during slip casing by pressure, is formed by colored steel pipe periphery slurry and is relatively large in diameter with soil body composite consolidation body, carried
High pulling capacity of soil nail power.
Technical scheme is as follows：
A kind of tubular type soil nailing, including flower steel pipe, anchor structure and slip casting casing, the anchor structure include hold-doun nut and
Billet；Described colored steel pipe one end is cone-shaped end, and the other end is open end, and open end is equipped with screw thread, flower steel pipe tube surfaces
Equipped with slurry outlet, it is welded with spiral steel rib on the outer wall of flower steel pipe tube body, the spiral steel rib is close to taper bit；Hua Gang
Slurry is first filled by slip casting hose in pipe；After taking out slip casting hose, slip casting sleeve one end is connect with flower steel pipe open end, separately
One end connects slip casting hose, carries out slip casing by pressure；After the completion of slip casing by pressure, slip casting casing is removed, the installation of flower steel pipe open end
The screw thread of billet and hold-doun nut, the hold-doun nut and flower steel pipe open end matches.
It is preferred that the slurry outlet takes quincunx or spiral arrangement.Avoid spend the same section of steel pipe at intensity losses compared with
Greatly.
It is preferred that slurry outlet a diameter of 5-10mm, spacing 0.2-0.5m.
Slip casting casing one end is fixed with flower steel pipe open end by screwed connection, and the other end (small-caliber end) and slip casting are soft
It is connected and fixed by steel wire.
Flower steel pipe is anchored in gunite concrete face layer, and the billet is used as Force transmission parts under anchor, size for 0.3 ×
0.3m, thick 10-15mm, there are the circular holes with steel pipe same diameter at center.
It is preferred that the spiral steel rib height is 30-50mm, rib width 3-5mm, spacing 100mm, arrangement length is about
0.5-1.0m, the open end screw thread arrangement length are 50-100mm.
The colored steel pipe uses quincunx arranged on concrete concrete topping, and level interval and vertical spacing are
0.8-1.5m。
The present invention also provides a kind of construction methods of tubular type soil nailing, include the following steps：
1) gunite concrete face layer：Determine and reserve colored steel pipe hole position in foundation pit walls, nation wire-ties net, sprays coagulation
Soil forms gunite concrete face layer；
2) construction of flower steel pipe：It waits for that concrete topping intensity reaches prescribed strength, flower steel pipe mechanical is rotatably pierced into soil
Body；
3) sealing of hole：The sealing of hole around flower steel pipe open end, during avoiding slip casing by pressure, mortar sprays around open end
Go out；
4) slip casing by pressure：The slip casting hose of minor diameter is first used deeply to spend steel pipe bottom, it from inside to outside gradually will flower steel pipe
Slurry is inside filled, slip casting hose is taken out；Slip casting sleeve one end is connect with flower steel pipe open end, the other end connects slip casting hose,
Carry out slip casing by pressure, grouting pressure 1-2MPa, voltage stabilizing 5 minutes；
5) anchor structure is installed：After the completion of slip casting, slip casting sleeve is removed, billet is installed in flower steel pipe open end, is used
Hold-doun nut is tightened onto the screw thread of colored steel pipe open end by mechanical equipment, provides small pre-stress, by flower steel pipe and concrete topping
It is connected as entirety, coagulation face stressor layer is made to pass to steel tube for soil-nail, common stress.
Present invention advantageous effect outstanding is：
(1) present invention is highly reliable, and using steel pipe type soil nailing, steel pipe rotary pierces the soil body, avoids in soft weak soil
When the construction of area, easily there are the construction problems such as collapse hole, burying and necking down；
(2) steel pipe end position of burying is constructed using spiral steel rib, reduces that steel pipe buries difficulty and steel pipe was burying
Loss in journey can accelerate construction progress；End anchorage power is improved in soil-nailed structure after shaping simultaneously, prevents body
There is break-off with steel pipe；
(3) pulling capacity of soil nail power is high.For flower steel pipe in drilling process, the flower steel pipe periphery soil body that spiral steel rib makes becomes thin
Pine, in slip casing by pressure, slurry and the soil body composite consolidation body of formation are relatively large in diameter, and improve pulling capacity of soil nail power；
(4) Supporting Structure deformation is small.Matching for port of steel pipe screw thread and hold-doun nut and billet, can be soil nailing
Small pre-stress is provided, to reduce Supporting Structure deformation；
(5) the cement mortar column calculus that slip casing by pressure is formed around soil nailing, improves the shearing strength of soil nailing, can prevent soil
The downslide of body, and then improve the stability of foundation pit.
(6) highly practical, backfill is can be widely applied to, soft muck soil, the soil properties such as liquefiable sandy soil are softly
Area.
Description of the drawings
Fig. 1 is the schematic diagram of present invention flower steel pipe and slip casting sleeve；
Fig. 2 is the overall structure floor map after the completion of tubular type plate brad supporting of the present invention；
Label and symbol description
1- spends steel pipe；2- slip casting sleeves；3- gunite concretes face layer；4- hold-doun nuts；5- billets；The spiral steel of 6-
Rib；7- cone-shaped ends；8- slurry outlets.
Specific implementation mode
The present invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment 1
As shown in Figure 1 and Figure 2, a kind of tubular type soil nailing, including flower steel pipe 1, anchor structure and slip casting casing 2, the anchoring knot
Structure includes hold-doun nut 4 and billet 5；Described 1 one end of colored steel pipe is cone-shaped end 7, and the other end is open end, and open end is equipped with
Screw thread, 1 tube surfaces of flower steel pipe are equipped with slurry outlet 8, are permeated to soil layer for high pressure down pipe entoplasm body, flower 1 tube wall of steel pipe
On be welded with spiral steel rib 6, the spiral steel rib 6 is close to cone-shaped end 7；It is first filled by slip casting hose in flower steel pipe 1
Slurry；2 one end of slip casting sleeve is connect with 1 open end of flower steel pipe after slip casting hose, the other end connects slip casting hose, is pressed
Power slip casting (slurry penetrates into the soil body from the hole on tube body)；After the completion of slip casing by pressure, slip casting casing 2 is removed, 1 open end of flower steel pipe
Billet 5 and hold-doun nut 4 are installed, the screw thread of 1 open end of the hold-doun nut 4 and flower steel pipe matches.The slurry outlet 8 is adopted
Take quincunx or spiral arrangement.Slurry outlet 8 a diameter of 5-10mm, spacing 0.2-0.5m.Flower steel pipe 1 is anchored in injection coagulation
Native face layer 3, the billet 5 is as Force transmission parts under anchor, and size is 0.3 × 0.3m, thick 10-15mm, center there are and steel pipe
The circular hole of same diameter.Spiral 6 height of steel rib is 30-50mm, rib width 3-5mm, spacing 100mm, arrangement length
About 0.5-1.0m；The screw thread arrangement length of the open end is 50-100mm.
Flower steel pipe 1 can be usedThe smooth bar pipe processing and fabricating of thick 3mm, flower steel pipe 1
It is made by factory process with mating hold-doun nut 4 and the unification of billet 5.
It is 0.8- that the colored steel pipe 1 uses quincunx arranged, level interval and vertical spacing on branch armour layer
1.5m.The tolerance of pitch-row is not more than 50mm.
The construction method of tubular type soil nailing, includes the following steps：
1. gunite concrete face layer：1 hole of colored steel pipe position is determined and reserved in foundation pit walls, and nation wire-ties net, and injection is mixed
Solidifying soil forms gunite concrete face layer 3；
2. spending the construction of steel pipe 1：It waits for that 3 intensity of concrete topping reaches prescribed strength, flower 1 machinery rotating type of steel pipe is pierced
The soil body；After flower steel pipe 1 pierces the soil body, a small amount of clear water is first pumped, Grouting Pipe injection hole bottom, dilution holes bottom residue, by body refuse are passed through
It holds out, to ensure grouting quality；The length of hole flushing should be consistent with the length of steel pipe；Hole flushing sewage should drain in time, prevent side slope
Because being caved in by the immersion of sewage.
3. sealing of hole：The sealing of hole around 1 open end of flower steel pipe, during avoiding slip casing by pressure, mortar sprays around open end
Go out；
4. slip casing by pressure：First slip casting hose is used deeply to spend steel pipe bottom, gradually will fill slurry in flower steel pipe from inside to outside
Body takes out slip casting hose；Slip casting sleeve (10) one end is connect with flower steel pipe (6) open end, the other end connects slip casting hose, into
Row slip casing by pressure, grouting pressure 1-2MPa, voltage stabilizing 5 minutes；
5. installing anchor structure：After the completion of slip casting, slip casting sleeve 2 is removed, in flower steel pipe open end in installation billet
5, hold-doun nut 4 is tightened onto to the screw thread of colored steel pipe open end.
6. after the soil nailing constructed reaches 70% design strength, i.e., nail Construction can cut the earth under after complete 6~7 days
One of soil nailing absolute altitude depth, carries out down the construction of one of soil nailing.
Claims (7)
1. a kind of tubular type soil nailing, it is characterised in that：Including flower steel pipe (1), anchor structure and slip casting casing (2), the anchoring knot
Structure includes hold-doun nut (4) and billet (5)；Described colored steel pipe (1) one end is cone-shaped end (7), and the other end is open end, is opened
Mouth end is equipped with screw thread, and flower steel pipe (1) tube surfaces are equipped with slurry outlet (8), and the outer wall of flower steel pipe (1) tube body is welded with spiral steel
Rib (6), for the spiral steel rib (6) close to cone-shaped end (7), flower steel pipe (1) is interior first to fill slurry by slip casting hose；Again will
Slip casting sleeve (2) one end is connect with flower steel pipe (1) open end, and the other end connects slip casting hose, carries out slip casing by pressure；Slip casing by pressure
After the completion, slip casting casing (2) is removed, flower steel pipe (1) open end installation billet (5) and hold-doun nut (4), the fixed spiral shell
Cap (4) and the screw thread of flower steel pipe (1) open end match.
2. a kind of tubular type soil nailing as described in claim 1, which is characterized in that the slurry outlet (8) takes quincunx or spiral
Arrangement.
3. a kind of tubular type soil nailing as claimed in claim 2, which is characterized in that slurry outlet (8) a diameter of 5-10mm, spacing 0.2-
0.5m。
4. a kind of tubular type soil nailing as described in claim 1, which is characterized in that slip casting casing (2) one end and flower steel pipe (1) open end
It is fixed by screwed connection, the other end is connected and fixed with slip casting hose by steel wire.
5. a kind of tubular type soil nailing as described in claim 1, which is characterized in that the colored steel pipe (1) is anchored in gunite concrete
Face layer (3), the billet (5) be used as anchor under Force transmission parts, size be 0.3 × 0.3m, thick 10-15mm, center there are and steel
The circular hole of pipe same diameter.
6. a kind of tubular type soil nailing as described in claim 1, which is characterized in that the spiral steel rib (6) is highly 30-
50mm, rib width 3-5mm, spacing 100mm, arrangement length about 0.5-1.0m；The screw thread arrangement length of the open end is 50-
100mm。
7. the construction method of tubular type soil nailing as described in claim 1, which is characterized in that include the following steps：
1) gunite concrete face layer：Colored steel pipe (1) hole position is determined and reserved in foundation pit walls, and nation wire-ties net, sprays coagulation
Soil forms gunite concrete face layer (3)；
2) construction of flower steel pipe (1)：It waits for that concrete topping (3) intensity reaches prescribed strength, flower steel pipe (1) machinery rotating type is bored
Enter the soil body；
3) sealing of hole：The sealing of hole around flower steel pipe (1) open end, during avoiding slip casing by pressure, mortar sprays around open end；
4) slip casing by pressure：First slip casting hose is used deeply to spend steel pipe bottom, gradually will fill slurry in flower steel pipe from inside to outside, take
Go out slip casting hose；Slip casting sleeve (10) one end is connect with flower steel pipe (6) open end, the other end connects slip casting hose, is pressed
Power slip casting, grouting pressure 1-2MPa, voltage stabilizing 5 minutes；
5) anchor structure is installed：After the completion of slip casting, slip casting sleeve (2) is removed, in flower steel pipe open end installation billet (5), is adopted
Hold-doun nut (4) is tightened onto to the screw thread of colored steel pipe open end with mechanical equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810174260.9A CN108316297A (en) | 2018-03-02 | 2018-03-02 | A kind of tubular type soil nailing and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810174260.9A CN108316297A (en) | 2018-03-02 | 2018-03-02 | A kind of tubular type soil nailing and its construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108316297A true CN108316297A (en) | 2018-07-24 |
Family
ID=62901862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810174260.9A Pending CN108316297A (en) | 2018-03-02 | 2018-03-02 | A kind of tubular type soil nailing and its construction method |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109056719A (en) * | 2018-08-09 | 2018-12-21 | 上海二十冶建设有限公司 | It is a kind of to pierce formula steel tube for soil-nail with drill bit conversion attachment device |
| CN109252529A (en) * | 2018-11-12 | 2019-01-22 | 同济大学浙江学院 | A kind of end extension slip casting steel tube for soil-nail |
| CN111173548A (en) * | 2020-01-20 | 2020-05-19 | 黑龙江工业学院 | Elastic spiral anchoring type roadway supporting method |
| CN116905465A (en) * | 2023-07-25 | 2023-10-20 | 西南石油大学 | Bionical pipe is used in soil body solidification based on microorganism mineralization technique |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1380472A (en) * | 2002-05-23 | 2002-11-20 | 谭跃虎 | Composite soil nail support construction method and soil nail for support construction |
| US20100166506A1 (en) * | 2003-12-18 | 2010-07-01 | R&B Leasing, Llc | Composite self-drilling soil nail and method |
| CN203891018U (en) * | 2014-06-16 | 2014-10-22 | 谢时雳 | Self-drilling type drainage anchoring soil nail |
| CN204418172U (en) * | 2015-01-06 | 2015-06-24 | 济南轨道交通集团有限公司 | The hollow soil nailing of precast prestressed concrete |
-
2018
- 2018-03-02 CN CN201810174260.9A patent/CN108316297A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1380472A (en) * | 2002-05-23 | 2002-11-20 | 谭跃虎 | Composite soil nail support construction method and soil nail for support construction |
| US20100166506A1 (en) * | 2003-12-18 | 2010-07-01 | R&B Leasing, Llc | Composite self-drilling soil nail and method |
| CN203891018U (en) * | 2014-06-16 | 2014-10-22 | 谢时雳 | Self-drilling type drainage anchoring soil nail |
| CN204418172U (en) * | 2015-01-06 | 2015-06-24 | 济南轨道交通集团有限公司 | The hollow soil nailing of precast prestressed concrete |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109056719A (en) * | 2018-08-09 | 2018-12-21 | 上海二十冶建设有限公司 | It is a kind of to pierce formula steel tube for soil-nail with drill bit conversion attachment device |
| CN109252529A (en) * | 2018-11-12 | 2019-01-22 | 同济大学浙江学院 | A kind of end extension slip casting steel tube for soil-nail |
| CN109252529B (en) * | 2018-11-12 | 2023-11-28 | 同济大学浙江学院 | End extension grouting steel pipe soil nail |
| CN111173548A (en) * | 2020-01-20 | 2020-05-19 | 黑龙江工业学院 | Elastic spiral anchoring type roadway supporting method |
| CN116905465A (en) * | 2023-07-25 | 2023-10-20 | 西南石油大学 | Bionical pipe is used in soil body solidification based on microorganism mineralization technique |
| CN116905465B (en) * | 2023-07-25 | 2024-02-09 | 西南石油大学 | Bionical pipe is used in soil body solidification based on microorganism mineralization technique |
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Application publication date: 20180724 |