CN108442372A - A kind of antidetonation soil nailing and its construction method for pattern foundation pit supporting structure - Google Patents
A kind of antidetonation soil nailing and its construction method for pattern foundation pit supporting structure Download PDFInfo
- Publication number
- CN108442372A CN108442372A CN201810413593.2A CN201810413593A CN108442372A CN 108442372 A CN108442372 A CN 108442372A CN 201810413593 A CN201810413593 A CN 201810413593A CN 108442372 A CN108442372 A CN 108442372A
- Authority
- CN
- China
- Prior art keywords
- soil nailing
- steel plate
- foundation pit
- billet
- arch steel
- 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.)
- Pending
Links
- 239000002689 soil Substances 0.000 title claims abstract description 55
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 69
- 239000010959 steel Substances 0.000 claims abstract description 69
- 239000004567 concrete Substances 0.000 claims abstract description 23
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 19
- 238000013016 damping Methods 0.000 claims abstract description 14
- 239000011378 shotcrete Substances 0.000 claims abstract description 14
- 230000002787 reinforcement Effects 0.000 claims abstract description 9
- 238000005553 drilling Methods 0.000 claims description 8
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract description 2
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000002789 length control Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000007582 slurry-cast process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 230000032258 transport Effects 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
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- 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
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
- E02D5/765—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor removable
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Foundations (AREA)
Abstract
The present invention provides a kind of antidetonation soil nailing and its construction method for pattern foundation pit supporting structure.A kind of antidetonation soil nailing for pattern foundation pit supporting structure includes soil nailing reinforcing bar, damping device, bar-mat reinforcement and gunite concrete face layer.The damping device includes arch steel plate or damping spring, billet and and anchor head.During usual pattern foundation pit supporting structure process and Underground Construction near heavily loaded Construction traffic disengaging margin of foundation pit, such as concrete mixer truck, the automobile of material is transported.In on foundation pit supporting construction the effects that the vibrations of ground pump in vehicular load and work progress.It causes soil nailing to be broken, causes foundation pit collapse, cause personnel and property loss.The present invention is to soil nailing end, damping device is installed in branch armour layer position, plays shock insulation, cushioning effect, avoids supporting construction under vehicle and the effect of other vibrations loads, soil nailing fracture occurs and leads to the destructions such as foundation pit collapse, can be widely applied to the plate brad supporting under dynamic loading.
Description
Technical field
The invention belongs to geotechnical engineering fields, and in particular to a kind of antidetonation soil nailing and its construction party for pattern foundation pit supporting structure
Method.
Background technology
During usual pattern foundation pit supporting structure process and Underground Construction, near heavily loaded Construction traffic disengaging margin of foundation pit, such as
Concrete mixer truck transports the automobile of material.In pattern foundation pit supporting structure knot the effects that the vibrations of ground pump in vehicular load and work progress
On structure.It causes soil nailing to be broken, causes foundation pit collapse, cause personnel and property loss.
Invention content
The present invention provides a kind of antidetonation soil nailing and its construction method for pattern foundation pit supporting structure, to solve soil nail wall in vehicle lotus
It carries or other vibrations loads acts on lower the technical issues of foundation pit destruction occurs.
A kind of antidetonation soil nailing for pattern foundation pit supporting structure, including soil nailing reinforcing bar, damping device and gunite concrete face layer, it is described
Damping device includes arch steel plate, billet and anchor head；Billet is fixed on the layer of gunite concrete face, and billet, which is equipped with, to be used
In the lateral steel rib of support arch steel plate, arch steel plate is placed on the lateral steel rib of billet, and arch steel plate center is equipped with bow
Shape steel plate centre bore, billet center are equipped with billet centre bore, and soil nailing reinforcing bar one end is located in drilling, and the other end sequentially passes through
Concrete topping, billet centre bore, arch steel plate centre bore, soil nailing reinforcing bar are anchored at by anchor head on arch steel plate.
The thickness of arch steel plate is 20-30mm.The identical arch steel plate of multiple curvature can also be used and be combined with each other use.
The thickness of billet is 20-30mm, billet centre bore, arch steel plate centre bore diameter and soil nailing reinforcing bar it is straight
Diameter is identical.
Further, the distance of arch steel plate centre bore to lateral steel rib is the half of the vertical width of arch steel plate, laterally
Steel rib positions arch steel plate to lift.
Arch steel plate in this way acts on billet, and billet acts on the layer of gunite concrete face.
The present invention also provides a kind of construction methods of the antidetonation soil nailing for pattern foundation pit supporting structure, include the following steps：
1) slope surface is cleared up, and is drilled in precalculated position；
2) Grouting Pipe and soil nailing main reinforcement are bundled, is put into drilling, stop grouting plug is installed at hell；
3) mortar is injected into drilling；
4) in branch armour layer linked network, gunite concrete forms gunite concrete face layer；
5) after the concrete strength of interior mortar hole to be drilled and gunite concrete face layer reaches 70%, billet and bow are installed
Arch steel plate is placed on the lateral steel rib of billet by shape steel plate, so that lateral steel rib is lifted positioning arch steel plate, then make soil nailing
Reinforcing bar pass through billet centre bore, arch steel plate centre bore, with anchor head by soil nailing Bar Anchorage on arch steel plate；
6) after the completion of waiting for first layer nail Construction, next layer of nail Construction is carried out.
Present invention advantageous effect outstanding is：
(1) present invention is by supporting construction face layer addition arch steel plate, playing shock insulation, cushioning effect avoids branch
Protection structure causes soil nailing to be broken, causes foundation pit collapse, cause personnel and property under heavy-duty vehicle and the effect of other vibrations loads
Loss.
(2) arch steel plate can carry out group according to actual loading situation using the identical arch steel plate of one or more curvature
Dress, to adapt to different load intensities.Arch steel plate elasticity modulus is big, is adapted to large-tonnage pattern foundation pit supporting structure.Damping dress of the present invention
It is set to detachable apparatus, can recycle, reduce cost.
(3) pass through optimization design, the action effect that vehicular traffic and other vibrations loads generate is acted on to foundation depth 1/
2 or more are affected, therefore damping device is typically located at the top half of foundation depth.Project cost can be reduced.
Description of the drawings
Fig. 1 is antidetonation soil nailing organigram (vertical view) of the present invention；
Fig. 2 is each component relative position schematic diagram of damping device of the present invention；
Fig. 3 is the overall structure diagram after the completion of a kind of antidetonation plate brad supporting of the present invention；
Label and symbol description
1- billets；2- transverse direction steel ribs；3- anchor heads；4- arch steel plates；5- soil nailing reinforcing bars；6- bodies；7- bar-mat reinforcements；
8- gunite concretes face layer；9 ground surfaces；10- bottom of foundation ditch.
Specific implementation mode
Embodiment 1
As shown in Figs. 1-3, a kind of antidetonation soil nailing for pattern foundation pit supporting structure, including soil nailing reinforcing bar 5, damping device and injection are mixed
Solidifying soil face layer 8, the damping device includes arch steel plate 4, billet 1 and anchor head 3；Billet 1 is fixed on gunite concrete face
On layer 8, billet 1 is equipped with the lateral steel rib 2 for being used to support arch steel plate 4, and 4 center of arch steel plate is equipped in arch steel plate 4
Heart hole, 1 center of billet are equipped with 1 centre bore of billet, and 5 one end of soil nailing reinforcing bar is located in drilling, and the other end sequentially passes through coagulation
Native face layer 8,1 centre bore of billet, 4 centre bore of arch steel plate, arch steel plate 4 is anchored at by 5 end anchor head 3 of soil nailing reinforcing bar
On.4 thickness of arch steel plate is 20-30mm.The thickness of billet 1 is 20-30mm, 1 centre bore of billet, 4 center of arch steel plate
The diameter in hole is identical as the diameter of soil nailing reinforcing bar 5.The distance of arch steel plate centre bore to lateral steel rib is that arch steel plate is vertically wide
The half of degree, to lift positioning arch steel plate.
A kind of concrete construction method of antidetonation soil nailing for pattern foundation pit supporting structure, includes the following steps：
A：Nail Construction
(1) slope excavating.It is excavated according to the stage excavation depth and the gradient of design, stage excavation.
(2) line setting is released the position of each soil nailing by survey crew by design drawing, makes label.
(3) pore-forming.Using artificial Luoyang Spade or auger bore, hole depth, can be appropriate when such as barrier not less than design
Adjust soil nailing angles and positions.
(4) soil nailing main reinforcement makes and places.Main reinforcement presses design length blanking, and outer end sets the crotch of " L " type, interval 2m welderings pair
Middle holder prevents soil nailing main reinforcement 5 from deviateing soil nailing center；When placing soil nailing main reinforcement 5, Grouting Pipe and soil nailing main reinforcement 5 are bundled in one
It rises, Grouting Pipe is from bottom hole about 0.5m.
(5) slurry and slip casting are stirred.Slip casting uses grouting pump, when noting mortar, Grouting Pipe is slowly uniformly extracted, but grout outlet is answered
Always it is in drilling under slurry surface, ensures that gas can all be discharged in hole, stop grouting plug is set at hell position, according to
It needs to mend and starch, ensure that soil nailing anchors weight.
(6) linked network.UsingSingle two-way, spacing 200mm reinforced mesh, the reinforced mesh reinforcing bar being inserted into soil
Fixed, with 3~5cm of slope surface gap, the adjacent net pieces lap of splice is not less than 300mm, and reinforced mesh is connected by reinforcing rib and soil nailing
It is connected into an entirety.
(7) gunite concrete.When spraying operation, air compressor machine 0.2~0.5MPa of air pressure, nozzle hydraulic is no less than
0.15MPa, in 0.6~1.0m, jet thickness is 80~100mm for jet length control.
B：Damping device is installed
(1) after the concrete strength of interior mortar hole to be drilled and gunite concrete face layer 8 reaches 70%, billet 1 is installed
And arch steel plate 4, arch steel plate 4 is placed on the lateral steel rib 2 of billet 1, lateral steel rib 2 is made to lift positioning arch steel plate
4,5 other end of soil nailing reinforcing bar passes through 1 centre bore of billet, 4 centre bore of arch steel plate that arch steel plate 4 is passed through lateral steel rib 2
Be placed on billet 1, with anchor head by soil nailing Bar Anchorage on arch steel plate；
(2) after the completion of waiting for first layer nail Construction, next layer of nail Construction is carried out.
Claims (5)
1. a kind of antidetonation soil nailing for pattern foundation pit supporting structure, which is characterized in that mixed including soil nailing reinforcing bar (5), damping device and injection
Solidifying soil face layer (8), the damping device includes arch steel plate (4), billet (1) and anchor head (3)；Billet (1) is fixed on spray
It penetrates on concrete topping (8), billet (1) is equipped with the lateral steel rib (2) for being used to support arch steel plate (4), arch steel plate (4)
Center is equipped with arch steel plate (4) centre bore, and billet (1) center is equipped with billet (1) centre bore, soil nailing reinforcing bar (5) one end position
In in drilling, the other end sequentially passes through concrete topping (8), billet (1) centre bore, arch steel plate (4) centre bore, anchor head
(3) soil nailing reinforcing bar (5) is anchored on arch steel plate (4).
2. a kind of antidetonation soil nailing for pattern foundation pit supporting structure as described in claim 1, which is characterized in that arch steel plate (4) thickness
For 20-30mm.
3. a kind of antidetonation soil nailing for pattern foundation pit supporting structure as described in claim 1, which is characterized in that the thickness of billet (1)
For 20-30mm, billet (1) centre bore, the diameter of arch steel plate (4) centre bore are identical as the diameter of soil nailing reinforcing bar (5).
4. a kind of antidetonation soil nailing for pattern foundation pit supporting structure as described in claim 1, which is characterized in that arch steel plate (4) center
The distance of hole to lateral steel rib (2) is the half of the vertical width of arch steel plate (4).
5. the construction method for the antidetonation soil nailing of pattern foundation pit supporting structure as described in claim 1, which is characterized in that including walking as follows
Suddenly：
1) slope surface is cleared up, and is drilled in precalculated position；
2) Grouting Pipe and soil nailing main reinforcement (5) are bundled, is put into drilling, stop grouting plug is installed at hell；
3) mortar is injected into drilling；
4) in branch armour layer linked network, gunite concrete forms gunite concrete face layer (8)；
5) after the concrete strength of mortar and gunite concrete face layer (8) in hole to be drilled reaches 70%, installation billet (1) and
Arch steel plate (4) makes soil nailing reinforcing bar (5) that billet (1) centre bore, arch steel plate (4) centre bore be passed through finally to use anchor head (3)
It is anchored on arch steel plate (4)；
6) after the completion of waiting for first layer nail Construction, next layer of nail Construction is carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413593.2A CN108442372A (en) | 2018-05-03 | 2018-05-03 | A kind of antidetonation soil nailing and its construction method for pattern foundation pit supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413593.2A CN108442372A (en) | 2018-05-03 | 2018-05-03 | A kind of antidetonation soil nailing and its construction method for pattern foundation pit supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108442372A true CN108442372A (en) | 2018-08-24 |
Family
ID=63202708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810413593.2A Pending CN108442372A (en) | 2018-05-03 | 2018-05-03 | A kind of antidetonation soil nailing and its construction method for pattern foundation pit supporting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108442372A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122132A (en) * | 2007-09-03 | 2008-02-13 | 中铁建设集团有限公司 | Demountable composite material face plate brad supporting system |
| CN202325584U (en) * | 2011-11-29 | 2012-07-11 | 中国科学院武汉岩土力学研究所 | Buffering energy-consumption anchor rod tray |
| CN107604927A (en) * | 2017-09-30 | 2018-01-19 | 青岛理工大学 | Composite pile anchor supporting device |
| CN207093110U (en) * | 2017-06-13 | 2018-03-13 | 王行思 | Anchor pole tail defense lid |
| CN208415245U (en) * | 2018-05-03 | 2019-01-22 | 大连理工大学 | A kind of antidetonation soil nailing for pattern foundation pit supporting structure |
-
2018
- 2018-05-03 CN CN201810413593.2A patent/CN108442372A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122132A (en) * | 2007-09-03 | 2008-02-13 | 中铁建设集团有限公司 | Demountable composite material face plate brad supporting system |
| CN202325584U (en) * | 2011-11-29 | 2012-07-11 | 中国科学院武汉岩土力学研究所 | Buffering energy-consumption anchor rod tray |
| CN207093110U (en) * | 2017-06-13 | 2018-03-13 | 王行思 | Anchor pole tail defense lid |
| CN107604927A (en) * | 2017-09-30 | 2018-01-19 | 青岛理工大学 | Composite pile anchor supporting device |
| CN208415245U (en) * | 2018-05-03 | 2019-01-22 | 大连理工大学 | A kind of antidetonation soil nailing for pattern foundation pit supporting structure |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
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Application publication date: 20180824 |