CN208136912U - A kind of small pre-stress pipe muscle formula soil nailing - Google Patents
A kind of small pre-stress pipe muscle formula soil nailing Download PDFInfo
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- CN208136912U CN208136912U CN201820293085.0U CN201820293085U CN208136912U CN 208136912 U CN208136912 U CN 208136912U CN 201820293085 U CN201820293085 U CN 201820293085U CN 208136912 U CN208136912 U CN 208136912U
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- steel pipe
- reinforcing bar
- flower
- variable cross
- pipe
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Abstract
The utility model relates to a kind of small pre-stress pipe muscle formula soil nailings.A kind of small pre-stress pipe muscle formula soil nailing, including flower steel pipe, variable cross-section reinforcement, several connection reinforcing bars and anchor structure；Flower steel pipe one end is cone-shaped end, the other end is open end, the axle center of flower steel pipe is equipped with variable cross-section reinforcement, the open end of flower steel pipe and variable cross-section reinforcement are welded as entirety by connection reinforcing bar, flower steel pipe tube surfaces are equipped with slurry outlet, and the flower external side of steel pipe is welded with spiral steel rib, and the spiral steel rib is close to cone-shaped end, variable cross-section reinforcement one end outside flower steel pipe is equipped with billet and hold-doun nut, and pipe muscle formula soil nailing is applied with small pre-stress.Tubular type soil nailing bearing capacity can be improved in variable cross-section reinforcement, while applying small pre-stress to variable cross-section reinforcement by nut, reduces the deformation of supporting construction.Steel pipe enters the soil body using mechanical rotary drilling, reduces steel pipe and buries the loss of difficulty and steel pipe during burying, accelerates construction progress, increase mortar reinforcing body diameter, improve withdrawal resistance.
Description
Technical field
The utility model belongs to geotechnical engineering field, and in particular to a kind of small pre-stress pipe muscle formula soil nailing.
Background technique
In the geotechnical anchor engineerings such as foundation pit, side slope, soil nailing is very widely used.Traditional soil nailing generally uses reinforcing bar soil nailing
With steel pipe type soil nailing, the work progress of reinforcing bar soil nailing needs preparatory machine drilling, should use up after pore-forming to prevent collapse hole phenomenon
The fast insertion 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 insertion, 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 steel tube for soil-nail (204849758 U of CN) is all made of and mechanically squeezes into mode, easily makes during squeezing into and ramming
Position damage is squeezed at steel pipe, while the steel pipe periphery soil body is compressed during squeezing into, causes mortar to soil body penetration difficulty, it is difficult
To guarantee to be formed 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
Guarantee, causes pulling capacity of soil nail power lower.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of small pre-stress pipe muscle formula soil nailing, formula pipe muscle formula is pierced
Soil nailing, soil nailing self-strength is big, is hardly damaged；Formation soil nailing periphery puddled soil composite consolidation body diameter is big, and withdrawal resistance is higher；Simultaneously
Small pre-stress can be provided by reinforcing bar nut, to reduce Supporting Structure deformation.
The utility model is a kind of small pre-stress pipe muscle formula soil nailing, including flower steel pipe, variable cross-section reinforcement, several connection steel
Muscle and anchor structure；The anchor structure includes hold-doun nut and billet；Described colored steel pipe one end is cone-shaped end, the other end
Axle center for open end, flower steel pipe is equipped with variable cross-section reinforcement, and the variable cross-section reinforcement is by the big section reinforcing bar of small bore reinforcement welding
It forming, described big section reinforcing bar one end is located at outside flower steel pipe, and is equipped with screw thread, and the big section reinforcing bar other end is located in flower steel pipe,
The big section reinforcement welding outside reinforcing bar one end and flower steel pipe is connected, the open end of the other end and flower steel pipe is welded, small bore reinforcing bar
One end and the vertex of cone-shaped end connect, several reinforcing bar positioning rings, reinforcing bar positioning are equipped between flower steel pipe and variable cross-section reinforcement
Ring constitutes (hollow structure) by outer ring, inner ring and connection rib set on outer ring and interior interannular, is located on the interior of colored steel pipe tube body outside
Wall, inner ring pass through variable cross-section reinforcement, connect with variable cross-section reinforcement spot welding, variable cross-section reinforcement is banded with slip casting PVC floral tube (slip casting
PVC floral tube is located on the outside of inner ring), flower steel pipe tube surfaces are equipped with slurry outlet (permeating for high pressure down pipe entoplasm body to soil layer),
The tube wall of flower steel pipe is welded with spiral steel rib, and the spiral steel rib is big outside flower steel pipe close to cone-shaped end
Section reinforcing bar one end is equipped with billet and hold-doun nut, and the screw thread that the hold-doun nut and big section reinforcing bar are equipped with matches,
Pipe muscle formula soil nailing is applied with small pre-stress, and the big section reinforcing bar is the reinforcing bar that diameter is 20-28mm, length is 0.5-0.8m,
Small bore reinforcing bar is the reinforcing bar that diameter is 10-16mm.
The spacing of reinforcing bar positioning ring is 0.5m.
Flower steel pipe needs to bear in the soil body Bracing Process shearing action, therefore to avoid the presence of slurry outlet from causing steel pipe
Section reduced performance, slurry outlet take quincunx or spiral arrangement, and pulp bore dia is 5-10mm, spacing 0.2-0.5m.
The spiral steel rib height is 30-50mm, rib width 3-5mm, spacing 100mm, arrangement length about 0.5-1.0m；
The billet is as Force transmission parts under anchor, size about 0.3 × 0.3m thickness 10-15mm, center there are with straighten through
Circular hole of the biggish section reinforcing bar with diameter.
Billet is fixed on concrete topping by the hold-doun nut and billet, is applied by nut to flower steel pipe micro-
Prestressing force combines anchorage effect.
The utility model also provides a kind of construction method of small pre-stress pipe muscle formula soil nailing, which is characterized in that including following
Step：
1) it determines and excavates position, carry out slope by design, cut the earth to first of soil nailing absolute altitude depth, clear up slope surface；Positioning
Steel tube for soil-nail position, and make marks；
2) mechanical equipment is installed, good position and angle are adjusted, flower steel pipe is pierced into the soil body；
3) the frustum type soil body is excavated around flower steel pipe open end, with mortar or Concrete Filled；
4) reinforcing bar positioning ring is through on variable cross-section reinforcement and is welded, by the binding of slip casting PVC floral tube on variable cross-section reinforcement,
Variable cross-section reinforcement is put into colored steel pipe；
5) progress slip casing by pressure, grouting pressure 1-2MPa, pressure stabilizing 5 minutes；
6) after the completion of slip casting, the open end of flower steel pipe and variable cross-section reinforcement are welded as by entirety by connection reinforcing bar；
7) assembling reinforcement net and gunite concrete surface layer；
8) after soil nailing and concrete topping reach 70% design strength, billet is installed, and by hold-doun nut to pipe
Muscle formula soil nailing applies small pre-stress.
The colored steel pipe uses quincunx arrangement cloth on concrete topping, and horizontal space and vertical spacing are 0.8-
1.5m。
The annular diameters of the reinforcing bar positioning ring are equal with bar diameter, and outer annular diameter is equal with flower pipe diameter.
The utility model beneficial effect outstanding is：
(1) the utility model is highly reliable, and using steel pipe muscle formula soil nailing, steel pipe directly squeezes into the soil body, avoids drilling note
Easily there are the construction problems such as collapse hole, burying and necking down when some soft soft clay areas are constructed in slurry technology；
(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；Mortar reinforcing body is relatively large in diameter in soil-nailed structure after shaping simultaneously, improves soil
Follow closely withdrawal resistance；
(3) reinforcing bar is inserted into steel pipe center, and the bearing capacity of steel tube for soil-nail can be improved；
(4) variable cross-section reinforcement is entirety with steel-pipe welding, can apply small pre-stress to steel pipe by nut, to reduce branch
The deformation of protection structure.
(5) practical, it can be widely applied to backfill, soft muck soil, the soil properties such as liquefiable sandy soil are softly
Area.
Detailed description of the invention
Fig. 1 is the sectional view of the utility model flower steel pipe and variable cross-section reinforcement；
Fig. 2 is reinforcing bar positioning ring section and slip casting PVC floral tube surface of position schematic diagram；
Fig. 3 is the overall structure diagram after the completion of the utility model small pre-stress pipe muscle formula plate brad supporting；
Label and symbol description
1- spends steel pipe；2- variable cross-section reinforcement；3- connection reinforcing bar；4- billet；5- hold-doun nut；The spiral steel rib of 6-；7-
Cone-shaped end；8- slurry outlet；9- gunite concrete surface layer, 10 reinforcing bar positioning rings；11- slip casting PVC floral tube；12- sealing of hole mortar or
Concrete.
Specific embodiment
Embodiment 1
As shown in Figure 1,3, a kind of small pre-stress pipe muscle formula soil nailing, including flower steel pipe 1, variable cross-section reinforcement 2, several connections
Reinforcing bar 3 and anchor structure；The anchor structure includes hold-doun nut 5 and billet 4；Described 1 one end of colored steel pipe is cone-shaped end
7, the other end is open end, and the axle center of flower steel pipe 1 is equipped with variable cross-section reinforcement 2, and the variable cross-section reinforcement 2 is by small bore reinforcement welding
Big section reinforcing bar forms, and described big section reinforcing bar one end is located at outside flower steel pipe 1, and is equipped with screw thread, big section reinforcing bar other end position
In big section reinforcing bar (the cutting greatly between screw thread and flower steel pipe open end in flower steel pipe 1, outside connection 3 one end of reinforcing bar and flower steel pipe 1
Face reinforcing bar) it welds, the open end of the other end and flower steel pipe 1 is welded, and small bore reinforcing bar one end is connect with the vertex of cone-shaped end 7,
Flower steel pipe 1 and variable cross-section reinforcement 2 between be equipped with several reinforcing bar positioning rings 10, be hollow structure, reinforcing bar positioning ring 10 by outer ring,
It inner ring and is constituted set on the connection rib of outer ring and interior interannular, is located on the inner wall of colored 1 tube body of steel pipe outside, inner ring passes through Variable Section Steel
Muscle 2 is connect with 2 spot welding of variable cross-section reinforcement, and variable cross-section reinforcement 2 is banded with slip casting PVC floral tube 11, and (slip casting PVC floral tube is located at inner ring
Outside, as shown in Figure 2), flower 1 tube surfaces of steel pipe are equipped with slurry outlet 8, and the tube wall of flower steel pipe 1 is welded with spiral steel rib
6, close to cone-shaped end 7, big section reinforcing bar one end outside colored steel pipe 1 is equipped with billet 4 and consolidates the spiral steel rib 6
Determine nut 5, the screw thread that the hold-doun nut 5 and big section reinforcing bar are equipped with matches, and pipe muscle formula soil nailing is applied with small pre-stress, institute
Stating big section reinforcing bar is the reinforcing bar that diameter is 20-28mm, length is 0.5-0.8m, and small bore reinforcing bar is that diameter is 10-16mm's
Reinforcing bar.Slurry outlet 8 takes quincunx or spiral arrangement, and 8 diameter of slurry outlet is 5-10mm, spacing 0.2-0.5m.The spiral shell
Rotating 6 height of steel rib is 30-50mm, rib width 3-5mm, spacing 100mm, arrangement length about 0.5-1.0m；The billet 4 is made
For Force transmission parts under anchor, size about 0.3 × 0.3m thickness 10-15mm, center is straightened there are same through the biggish same diameter of section reinforcing bar
Circular hole.The colored steel pipe 1 uses quincunx arrangement cloth on concrete topping 9, and horizontal space and vertical spacing are 0.8-
1.5m。
Flower steel pipe can be usedThe smooth bar pipe of thick 3mm makes.
A kind of construction method of small pre-stress pipe muscle formula soil nailing, which is characterized in that include the following steps：
Position is excavated 1. determining, carries out slope by design, cuts the earth to first of soil nailing absolute altitude depth, clears up slope surface；Positioning
Steel tube for soil-nail position, and make marks；
2. installing mechanical equipment, good position and angle are adjusted, flower steel pipe 1 is pierced into the soil body；
3. excavating the frustum type soil body around flower 1 open end of steel pipe, filled with sealing of hole mortar or concrete 12；
4. reinforcing bar positioning ring 10 to be through on variable cross-section reinforcement 2 and weld, slip casting PVC floral tube 11 is bound in Variable Section Steel
On muscle 2, variable cross-section reinforcement 2 is put into colored steel pipe 1, as shown in Figure 2；
5. slip casing by pressure is carried out, grouting pressure 1-2MPa, pressure stabilizing 5 minutes；
6. after the completion of slip casting, the open end of flower steel pipe 1 and variable cross-section reinforcement 2 are welded as entirety by connection reinforcing bar 3；
7. assembling reinforcement net and gunite concrete surface layer 9；
8. installing billet 4, and right by hold-doun nut 5 after soil nailing and concrete topping reach 70% design strength
Pipe muscle formula soil nailing applies small pre-stress.
Claims (6)
1. a kind of small pre-stress pipe muscle formula soil nailing, which is characterized in that including flower steel pipe (1), variable cross-section reinforcement (2), several companies
Connect reinforcing bar (3) and anchor structure；The anchor structure includes hold-doun nut (5) and billet (4)；Described colored steel pipe (1) one end
For cone-shaped end (7), the other end is open end, and the axle center of flower steel pipe (1) is equipped with variable cross-section reinforcement (2), the variable cross-section reinforcement
(2) it is welded by small bore reinforcing bar and big section reinforcing bar, described big section reinforcing bar one end is located at flower steel pipe (1) outside, and is equipped with
Screw thread, the other end are located in flower steel pipe (1), the big section reinforcement welding of connection reinforcing bar (3) one end and flower steel pipe (1) outside, another
End and the open end of flower steel pipe (1) are welded, and small bore reinforcing bar one end is connect with the vertex of cone-shaped end (7), are spent steel pipe (1) and are become
Between section reinforcing bar (2) be equipped with several reinforcing bar positioning rings (10), reinforcing bar positioning ring (10) by outer ring, inner ring and be set to outer ring and
The connection rib of interior interannular is constituted, and is located on the inner wall of colored steel pipe (1) tube body outside, inner ring passes through variable cross-section reinforcement (2), with variable cross-section
Reinforcing bar (2) spot welding connection, variable cross-section reinforcement (2) are banded with slip casting PVC floral tube (11), and flower steel pipe (1) tube surfaces are equipped with pulp
The tube wall in hole (8), flower steel pipe (1) is welded with spiral steel rib (6), and the spiral steel rib (6) is close to cone-shaped end
(7), it is located at the big section reinforcing bar one end of flower steel pipe (1) outside and billet (4) and hold-doun nut (5), the hold-doun nut is installed
(5) it is matched with the screw thread that is equipped with of big section reinforcing bar, pipe muscle formula soil nailing is applied with small pre-stress, and the big section reinforcing bar is diameter
For 20-28mm, the reinforcing bar that length is 0.5-0.8m, small bore reinforcing bar is the reinforcing bar that diameter is 10-16mm.
2. a kind of small pre-stress pipe muscle formula soil nailing as described in claim 1, which is characterized in that the spacing of reinforcing bar positioning ring (10)
For 0.5m.
3. a kind of small pre-stress pipe muscle formula soil nailing as described in claim 1, which is characterized in that slurry outlet (8) takes quincunx
Or spiral arrangement, slurry outlet (8) diameter are 5-10mm, spacing 0.2-0.5m.
4. a kind of small pre-stress pipe muscle formula soil nailing as described in claim 1, which is characterized in that the spiral steel rib (6) is high
Degree is 30-50mm, rib width 3-5mm, spacing 100mm, arrangement length about 0.5-1.0m.
5. a kind of small pre-stress pipe muscle formula soil nailing as described in claim 1, which is characterized in that the billet (4) is used as anchor
Lower Force transmission parts, size about 0.3 × 0.3m thickness 10-15mm, there are same big section reinforcing bars with the circular hole of diameter at center.
6. a kind of small pre-stress pipe muscle formula soil nailing as described in claim 1, which is characterized in that the colored steel pipe (1) is in coagulation
Quincunx arrangement cloth is used on native surface layer (9), horizontal space and vertical spacing are 0.8-1.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820293085.0U CN208136912U (en) | 2018-03-02 | 2018-03-02 | A kind of small pre-stress pipe muscle formula soil nailing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820293085.0U CN208136912U (en) | 2018-03-02 | 2018-03-02 | A kind of small pre-stress pipe muscle formula soil nailing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208136912U true CN208136912U (en) | 2018-11-23 |
Family
ID=64288069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820293085.0U Withdrawn - After Issue CN208136912U (en) | 2018-03-02 | 2018-03-02 | A kind of small pre-stress pipe muscle formula soil nailing |
Country Status (1)
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| CN (1) | CN208136912U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108221978A (en) * | 2018-03-02 | 2018-06-29 | 大连理工大学 | A kind of small pre-stress pipe muscle formula soil nailing and its construction method |
| RU204485U1 (en) * | 2021-03-15 | 2021-05-26 | Виктория Анатольевна Бунина | PEG FOR INSTALLING TUBULAR FRAME |
-
2018
- 2018-03-02 CN CN201820293085.0U patent/CN208136912U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108221978A (en) * | 2018-03-02 | 2018-06-29 | 大连理工大学 | A kind of small pre-stress pipe muscle formula soil nailing and its construction method |
| CN108221978B (en) * | 2018-03-02 | 2023-05-26 | 大连理工大学 | Micro-prestressed pipe rib type soil nail and construction method thereof |
| RU204485U1 (en) * | 2021-03-15 | 2021-05-26 | Виктория Анатольевна Бунина | PEG FOR INSTALLING TUBULAR FRAME |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181123 Effective date of abandoning: 20230526 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20181123 Effective date of abandoning: 20230526 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |