CN208885315U - High tensile steel tube concrete pillar for coal mining - Google Patents
High tensile steel tube concrete pillar for coal mining Download PDFInfo
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- CN208885315U CN208885315U CN201821183690.9U CN201821183690U CN208885315U CN 208885315 U CN208885315 U CN 208885315U CN 201821183690 U CN201821183690 U CN 201821183690U CN 208885315 U CN208885315 U CN 208885315U
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Abstract
The utility model discloses the high tensile steel tube concrete pillars for coal mining, including top steel pipe column and lower part steel pipe column, the lower part steel pipe column is connected and is connected to top steel pipe column, injected hole is offered on the lower part steel pipe column side wall, and unidirectional grouting stop-valve is installed at injected hole, it is connected between the unidirectional grouting stop-valve and lower part steel pipe column by injected hole, the concrete injects lower part steel pipe column inner cavity through injected hole by unidirectional grouting stop-valve, constantly concrete is injected from unidirectional grouting stop-valve, concrete rises from lower part steel pipe column until concrete is full of top steel pipe column inner cavity.The utility model utilizes constraint of the steel pipe column to concrete, the stress condition for improving concrete improves the intensity of concrete, and then solves conventional monomer hydraulic prop low bearing capacity in the prior art, flexible the problem of fractureing after by larger pressure, is, it can be achieved that the high requirement for supporting pressure.
Description
Technical field
The utility model relates to coal mining fields, and in particular to the high strength steel pipe concrete branch for coal mining
Column.
Background technique
In recent years, with China's coal-mine adopt it is deep continue to increase, deep-well tunnel mine pressure manifestation gradually highlights, and cuts simultaneously
The new technologies such as top release gob side entry retaining also improve the requirement for bearing capacity of roadway support body, the currently used hydraulic branch of conventional monomer
Column is flexible after by larger pressure to fracture due to low bearing capacity, has been difficult to meet the requirement of high support pressure.
Utility model content
In order to solve the problems in the existing technology, the utility model provides the high tensile steel tube for coal mining
Concrete pillar, by injecting concrete into steel pipe column, constraint using steel pipe column to concrete, improve concrete by
Power condition, improves the intensity of concrete, and then solves the problems, such as conventional monomer hydraulic prop low bearing capacity in the prior art, can
Realize the requirement of high support pressure.
In order to achieve the above objectives, the technical solution adopted in the utility model is that the high tensile steel tube for coal mining is mixed
Solidifying soil pillar, including top steel pipe column, lower part steel pipe column and unidirectional grouting stop-valve, top steel pipe column protrude into the steel pipe column of lower part, institute
It states and offers injected hole on the steel pipe column side wall of lower part, be connected between the unidirectional grouting stop-valve and lower part steel pipe column by injected hole.
The top steel pipe column is the 1/6~1/2 of top steel pipe column total length for the length of nested parts.
The lower end of the lower part steel pipe column is fixed with column shoes, and the upper end of the top steel pipe column is fixed with bolumn cap, under described
The cross section of portion's steel pipe column and top steel pipe column is circle.
The side wall of the top steel pipe column offers gas vent close to the position of bolumn cap.
The unidirectional grouting stop-valve includes nipple, one-way valve tube and quick casting head, described nipple one end and lower part steel
It is connected between tubing string by injected hole, the nipple other end is connected to one-way valve tube one end, the one-way valve tube other end and quickly note
First end connection is starched, the quick casting head other end is the grouting port for being pumped into concrete slurry.
It is the cavity for fill concrete in the lower part steel pipe column and top steel pipe column.
The top steel pipe column and lower part steel pipe column are all made of the seamless steel pipe with a thickness of 6~10mm, top steel pipe column
Outer diameter is 4~7mm smaller than the internal diameter of lower part steel pipe column.
The concrete is normal concrete addition swelling agent or is aluminate self-stressing cement and normal sands or stone
Aggregate configures, and internal stress is 0.5~8MPa under the confining pressure effect that steel pipe provides, and strength grade is C25~C60.
Compared with prior art, the utility model at least has the advantages that
The utility model injects concrete from the grouting port of unidirectional grouting stop-valve, and concrete passes through unidirectional grouting stop-valve from injected hole
Injection lower part steel pipe column stops when the gas vent of top steel pipe column has concrete slurry spilling by continuously injecting
Only slip casting indicates that concrete has filled lower part steel pipe column and top steel pipe column at this time.The utility model uses slightly expanded concrete
The assembled casing for pouring top and the bottom steel pipe composition, using the pump injection pressure power of concrete, so that top steel pipe column comes into contact with tunnel
Top plate enables to concrete filled steel tube pillar to well adapt to the variation of head-room, can be timely when back deformation
Carrying.Using slightly expanded concrete, the prestressing force that steel pipe applies core concrete is improved after final set, improves steel tube concrete
Native prop holistic resistant behavior.Compared with conventional monomer hydraulic prop in the prior art, the utility model is steel tube concrete
Native solid strut, the utility model utilize constraint of the steel pipe column to concrete, improve the stress condition of concrete, improve mixed
The intensity of soil is coagulated, and then solves conventional monomer hydraulic prop low bearing capacity in the prior art, it is flexible after by larger pressure to fracture
The problem of, it can be achieved that high support pressure requirement；Moreover, the utility model middle and upper part pipe column lower end is nested into lower part steel pipe column
In, and can be up and down, it can use the pump injection pressure power of concrete, so that top steel pipe column slowly contacts back, it can
To realize the adaptive adjustment of strut height, to adapt to different head-rooms.
Further, the inner nesting portion length of the utility model top steel pipe column and the total length ratio of top steel pipe column are
1/6~1/2, the bearing capacity of concrete pillar is improved, can be prevented because pillar is broken caused by Tunnel Pressure is excessive
Or the appearance of avalanche situation, while also improving the safety of construction.
Further, the utility model top steel pipe column side wall offers gas vent, the meeting when concrete fills steel pipe column
There is concrete slurry to overflow from gas vent, can be used as the mark whether monitoring concrete fills full steel pipe column inner cavity, convenient for construction
Operation.
Further, the utility model uses the bearing capacity that steel pipe column can be improved with a thickness of the seamless steel pipe of 6~10mm,
Meet intensity requirement when concrete pillar load-bearing.
Further, the utility model can prevent the refluence of concrete, infuse from grouting port by the way that unidirectional grouting stop-valve is arranged
The concrete entered enters steel pipe column inner cavity by the unidirectional grouting stop-valve sealed, forms concrete pillar.
Further, the utility model selects slightly expanded concrete or aluminate salt concrete, improves concrete final set
The prestressing force that steel pipe applies core concrete afterwards improves concrete filled steel tube prop holistic resistant behavior.
Further, on the one hand the column shoes of the utility model lower part steel pipe column bottom end seal, in addition it can divide
It dissipates concrete pillar to be distributed the pressure on ground, prevents the work for losing carrying because of the pillar that pillar falls into ground and may cause
With.
Detailed description of the invention
Fig. 1 is concrete filled steel tube schematic diagram；
Fig. 2 is unidirectional grouting stop-valve structural schematic diagram；
Wherein, 1, lower part steel pipe column；2, top steel pipe column；3, concrete；4, column shoes；5, unidirectional grouting stop-valve；6, bolumn cap；7,
Gas vent；8, nipple；9, one-way valve tube；10, quick filling adaptor；11, grouting port；12, injected hole.
Specific embodiment
The utility model is described further with reference to the accompanying drawings and detailed description:
As shown in Figure 1, the utility model includes lower part steel pipe column 1, top steel pipe column 2, column shoes 4, bolumn cap 6 and unidirectional only slurry
Valve 5, lower part steel pipe column 1 and top steel pipe column 2 are all made of the seamless steel pipe with a thickness of 6~10mm, and the lower end of top steel pipe column 2 is embedding
It is inserted in 1 middle and upper part steel pipe column 2 of lower part steel pipe column and is nested in the length of 1 the inside of lower part steel pipe column and the total length of top steel pipe column 2
Than being 1/6~1/2, and can be up and down；It is on the one hand risen in this way together with 4 sealing welding of column shoes the lower end of lower part steel pipe column 1
Sealing function is distributed in addition it can disperse concrete pillar to the pressure on ground, and preventing may because pillar falls into ground
Caused pillar loses the effect of carrying, and steel pipe column 2 upper end in top welds together with bolumn cap 6, and the upper end of top steel pipe column 2 is leaned on
The position of nearly bolumn cap 6 offers gas vent 7, and concrete slurry is had when concrete 3 fills steel pipe column and is overflowed from gas vent 7,
Can be used as the mark whether monitoring concrete 3 fills full steel pipe column inner cavity, the side wall of lower part steel pipe column 1 offers injected hole 12,
For docking with the output end of unidirectional grouting stop-valve 5, and then inject concrete 3.
As shown in Fig. 2, unidirectional grouting stop-valve 5 includes nipple 8, one-way valve tube 9 and quick casting head 10, nipple 8 and list
It is connected to valve pipe 9 and is bolted together, one-way valve tube 9 is connected and is bolted with quick casting head 10
Together, quick 10 right end of casting head offers grouting port 11；It is cut with scissors on the one side that one-way valve tube 9 is contacted with quick casting head 10
The baffle of grouting port 11 can be blocked by being connected to one, and when the slip casting into one-way valve tube 9 of grouting port 11, baffle is rushed to open, and works as slip casting
When mouth 11 stops slip casting, the reflux of slurry will drive baffle and block grouting port 11；The right end of the nipple 8 of unidirectional grouting stop-valve 5
Face injected hole 12 welds together with lower part steel pipe column 1, and entire slip casting process thus may be implemented: by concrete 3 from list
It is injected to the grouting port 11 of grouting stop-valve 5, concrete 3 successively passes through one-way valve tube 9 and nipple 8, under injecting via injected hole 12
Portion's steel pipe column 1 constantly injects concrete 3 from grouting port 11, until the gas vent 7 of top steel pipe column 2 has concrete slurry spilling
When, it indicates that concrete 3 has filled the inner cavity of lower part steel pipe column 1 and top steel pipe column 2, stops injecting coagulation toward grouting port 11 at this time
Soil 3, and under the action of unidirectional grouting stop-valve 5, it can guarantee that slurry is stablized, until concrete slurry solidifies.
In a certain embodiment of the utility model, 1 overall diameter of lower part steel pipe column is 219mm, wall thickness 10mm, length
Degree is 4m；The positive square column shoes 4 of bottom end incision welding are with a thickness of 20mm, side length 400mm；In lower part, 1 side of steel pipe column is cut
The circular hole that a diameter is 100mm is cut, welds a unidirectional grouting stop-valve 5, unidirectional grouting stop-valve 5 is by nipple 8,9 and of one-way valve tube
Quick filling adaptor 10 forms, as shown in Figure 2.8 caliber of nipple is 130mm, wall thickness 10mm, the permission slurries of one-way valve tube 9
It is injected by grouting port 11, and prevents the reflux of concrete slurry.Quick filling adaptor 10 can realize unidirectional grouting stop-valve and slip casting
The quick connection and disassembly of pump, unidirectional 5 distance of the minimum weld away from column shoes 4 of grouting stop-valve are 300mm.
Steel pipe column 2 overall diameter in top is 194mm, wall thickness 10mm, length 3m；The square column of top incision welding
Cap 6 is with a thickness of 20mm, side length 400mm；4 gas vents 7 are being opened away from top, are circumferentially being evenly arranged, aperture 5mm, Kong Zhong
Distance of the heart apart from bolumn cap 6 is 15mm, and the concrete 3 filled in top steel pipe column 2 and lower part steel pipe column 1 is normal silicate water
Mud mixes appropriate swelling agent, configures by a certain percentage with normal sands, stone, strength grade of concrete C30.
When in use, it slots first in lower part steel pipe bottom end and welds the i.e. unidirectional grouting stop-valve 5 of an one-way valve tube, as mixed
The inlet of solidifying soil paste liquid；Then it is welded at the top nozzle of top steel pipe column 2 and at the bottom end nozzle of lower part steel pipe column 1 respectively
A steel plate sealing is connect, respectively as the column shoes 4 and bolumn cap 6 of concrete filled steel tube pillar；It then will in coal mine underground construction place
After pillar erects, concrete slurry is injected from unidirectional grouting stop-valve 5 using concrete grouting pump；Row to 2 top of top steel pipe column
Stomata stops slip casting when having concrete slurry outflow, and closes unidirectional grouting stop-valve 5, after concrete curing, steel pipe with plate
Concrete can be used as supporting body supported laneway top plate.
The above is only the preferred embodiment of the utility model, not to any restrictions of the utility model, for this
For the technical staff in field, can technical solution and design as described above, modify and wait to the utility model
Structure replacement is imitated, without departing from the objective and range of utility model technical solution, the right in the utility model should all be covered
In claimed range.
Claims (7)
1. being used for the high tensile steel tube concrete pillar of coal mining, it is characterised in that: including top steel pipe column (2), lower part steel
Tubing string (1) and unidirectional grouting stop-valve (5), top steel pipe column (2) protrude into lower part steel pipe column (1), lower part steel pipe column (1) side wall
On offer injected hole (12), be connected between the unidirectional grouting stop-valve (5) and lower part steel pipe column (1) by injected hole (12).
2. the high tensile steel tube concrete pillar according to claim 1 for coal mining, it is characterised in that: on described
Portion's steel pipe column (2) is the 1/6~1/2 of top steel pipe column (2) total length for the length of nested parts.
3. the high tensile steel tube concrete pillar according to claim 1 for coal mining, it is characterised in that: under described
The lower end of portion's steel pipe column (1) is fixed with column shoes (4), and the upper end of the top steel pipe column (2) is fixed with bolumn cap (6), the lower part
The cross section of steel pipe column (1) and top steel pipe column (2) is circle.
4. the high tensile steel tube concrete pillar according to claim 3 for coal mining, it is characterised in that: on described
The side wall of portion's steel pipe column (2) offers gas vent (7) close to the position of bolumn cap (6).
5. the high tensile steel tube concrete pillar according to claim 1 for coal mining, it is characterised in that: the list
It include nipple (8), one-way valve tube (9) and quick casting head (10) to grouting stop-valve (5), described nipple (8) one end and lower part
It is connected between steel pipe column (1) by injected hole (12), nipple (8) other end is connected to one-way valve tube (9) one end, one-way valve tube
(9) other end is connected to quick casting head (10) one end, and quick casting head (10) other end is for being pumped into concrete slurry
Grouting port (11).
6. the high tensile steel tube concrete pillar according to claim 1 for coal mining, it is characterised in that: under described
It is the cavity for fill concrete (3) in portion's steel pipe column (1) and top steel pipe column (2).
7. the high tensile steel tube concrete pillar according to claim 1 for coal mining, it is characterised in that: on described
Portion's steel pipe column (2) and lower part steel pipe column (1) are all made of the seamless steel pipe with a thickness of 6~10mm, the outer diameter ratio of top steel pipe column (2)
Small 4~the 7mm of internal diameter of lower part steel pipe column (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821183690.9U CN208885315U (en) | 2018-07-25 | 2018-07-25 | High tensile steel tube concrete pillar for coal mining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821183690.9U CN208885315U (en) | 2018-07-25 | 2018-07-25 | High tensile steel tube concrete pillar for coal mining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208885315U true CN208885315U (en) | 2019-05-21 |
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ID=66507338
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821183690.9U Active CN208885315U (en) | 2018-07-25 | 2018-07-25 | High tensile steel tube concrete pillar for coal mining |
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| Country | Link |
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| CN (1) | CN208885315U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026085A (en) * | 2018-07-25 | 2018-12-18 | 陕西煤业化工技术研究院有限责任公司 | A kind of coal mining high tensile steel tube concrete pillar and its application method |
-
2018
- 2018-07-25 CN CN201821183690.9U patent/CN208885315U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026085A (en) * | 2018-07-25 | 2018-12-18 | 陕西煤业化工技术研究院有限责任公司 | A kind of coal mining high tensile steel tube concrete pillar and its application method |
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