CN201459678U - Special orifice device for circulating grouting in shallow bored hole - Google Patents
Special orifice device for circulating grouting in shallow bored hole Download PDFInfo
- Publication number
- CN201459678U CN201459678U CN2009200938878U CN200920093887U CN201459678U CN 201459678 U CN201459678 U CN 201459678U CN 2009200938878 U CN2009200938878 U CN 2009200938878U CN 200920093887 U CN200920093887 U CN 200920093887U CN 201459678 U CN201459678 U CN 201459678U
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- grouting
- sleeved
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Abstract
The utility model discloses a special orifice device for circulating grouting in shallow bored holes, which belongs to the technical field of the water conservancy and hydropower equipment. The special orifice device is characterized in that an internal sleeved transfusion pipe is communicated with a transfusion pipe through a slurry admission valve, the outside of the internal sleeved transfusion pipe is jacketed with an external sleeved return valve, the outer wall of the external sleeved return valve is in clearance fit with grouting holes, the outer ends of the external sleeved return valve and the internal sleeved transfusion pipe are enclosed and fixed, and air outlet pipes are communicated outside the grouting holes of the external sleeved return valve through the return valve. The utility model has the following advantages that: firstly, no operational failure caused by the unsmooth return slurry or accidents influencing the construction quality can occur in construction; secondly, the utility model realizes the domestic highest standards for the grouting screen propeller, the grouting can be realized within in 30 minutes under the condition with the maximum design pressure and with the injection rate no more than 0.1 L/min; thirdly, the utility model satisfies the needs of general grouting construction under the conventional pressure; fourthly, the utility model has a reliable sealing quality with no water leakage or dripping.
Description
Technical field
The utility model belongs to water conservancy, hydroelectric project equipment technical field.
Background technology
In water conservancy project dam, the tunnel country rock shallow bore hole grouting construction process, often run into the grouting of shallow bore hole (hole depth is in 6-8m), these grouting are according to the requirement of existing construction technique normalizing and design specifications, and the aperture is generally all below Φ 60mm, even below the Φ 50mm of aperture; Usually require the full hole of blocked hole internal-circulation type, aperture once grouting.Traditional mechanical type plug and hydraulic pressure, pressure dam can't solve the technical requirements of hole internal-circulation type grouting.Because under the condition of flow and limited aperture, the narrow gaps of grouting inner and outer pipes, overfall does not freely very easily silt the overfall passage up, has influence on the quality of grouting construction operation and grouting construction, increases drilling accident.Circulation is that grouting is necessary in the hole, because in this shallow bore hole grouting, inserted grouting can't form air in the hole to be got rid of, and greatly reduces grouting construction effect and quality.
In addition, internal-circulation type grouting in this shallow bore hole hole is removed the aperture plug at once after grouting finishes, because the inclination angle of grout hole is different, even the aperture down, and slurries can't be retained in the hole, cause the sealing of hole difficulty; Under the effect of water osmotic pressure, sealing quality is difficult to guarantee outside having.For fear of the generation of this shallow bore hole grouting construction mass defect with leave over, after grouting finished, the grout compartment band pressed screen slurry and underflow band to press off the slurry end, is the insurmountable and novel packer technical issues that need to address of this conventional grout plug.
Summary of the invention
The purpose of this utility model is: a kind of shallow bore hole hole internal-circulation type grouting dedicated ports device is provided, and it has realized the internal-circulation type grouting of disposable shallow bore hole hole.
The technical solution of the utility model is: interior cover feed pipe for mortar is communicated with feed pipe for mortar by slurry-inlet valve, be provided with the overcoat return pipe in interior cover feed pipe for mortar outside, overcoat return pipe outer wall and grout hole matched in clearance, overcoat return pipe and interior cover feed pipe for mortar are fixing in the outer end sealing, and the grout hole outside of overlapping return pipe outside is communicated with escape pipe by slurry traversing valve.
The beneficial effects of the utility model are:
(1) manages the stock pump discharge capacity greater than 70L/min, under the prerequisite of Φ 50mm aperture specification, realized underflow water: overfall operation failure that does not freely cause and the accident that influences construction quality, do not take place and take place in ash=(weight ratio) hole internal-circulation type grouting in 0.6: 1 in the construction.
(2) application of this shallow bore hole hole internal-circulation type grouting dedicated ports device, make the highest domestic grouting screen slurry standard: " grout compartment is under maximum design pressure, and injection rate is not more than 0.1L/min, continues perfusion 30min and finishes " is achieved.Only bring up to this ending standard, plentiful dam overflow monolith reduces desired standard (the permeability rate q after irritating≤0.1Lu) just may realize of seepage pressure engineering.
(3) application of this shallow bore hole hole internal-circulation type grouting dedicated ports device, withstand voltage 2MPa (the about 4kN of the aperture upper lifting force) standard that can reach satisfies the needs that general conventional pressure grouting is constructed.
(4) this shallow bore hole hole internal-circulation type grouting is after grouting finishes, needn't remove the aperture plug at once. operating personnel are as long as advance slurry according to grout pump slurry valve last time and this device aperture, the overfall valve is rationally closed down sequence construction, with regard to energy safety, realize that successfully underflow waits to press off the slurry operational sequence. press screen slurry and underflow to wait to press off the operation link of slurry owing to realized band, solved because the inclination angle of grout hole is different, even the aperture down, slurries can't be retained in the hole, cause the problem of sealing of hole difficulty. after construction finishes, under the effect of water osmotic pressure outside having (upstream hydrostatic head pressure 0.6MPa), sealing quality is reliable, there is not the seepage dripping phenomenon. after having solved the grouting of employing conventional grout plug, need again sealing of hole behind the cleaning bottom of hole, even adopt the problem of special hole sealing device and equipment and difficult quality guarantee.
(5) traditional cost of manufacture that can reusable mechanical type plug is very high; And this disposable shallow bore hole hole internal-circulation type grouting dedicated ports device, cost of manufacture is very low, though be the not reproducible utilization of disposable input, but because in the input of the manpower of grout hole sealing of hole, material, equipment, be far smaller than traditional mechanical type packer method essential input amount of sealing of hole operation after grouting, overall construction cost is still saved relatively.Most importantly, obtained reliable sealing quality.
Description of drawings
Fig. 1 is the utility model structure sectional view.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further:
As shown in the figure, the 1st, escape pipe, the 2nd, slurry traversing valve, the 3rd, interior cover feed pipe for mortar, the 4th, slurry-inlet valve, the 5th, overcoat return pipe, the 6th, feed pipe for mortar.
Cover feed pipe for mortar 3 length slightly are shorter than hole depth in of the present utility model, interior cover feed pipe for mortar 3 is longer than overcoat return pipe 5, and interior cover feed pipe for mortar 3 external diameters are less than overcoat return pipe 5 internal diameters, make its intersection form a hollow cavity, when the water conservancy project dam, after tunnel country rock shallow bore hole is accomplished fluently, interior cover feed pipe for mortar 3 is inserted in the grout hole, insert in the grout hole until overcoat return pipe 5 also part, because of overcoat return pipe 5 and grout hole form matched in clearance, make in the grout hole and seal the partition state with extraneous formation, open slurry-inlet valve 4, slurries will be input in the grout hole continuously from inside to outside, and the air in the grout hole is by overcoat return pipe 5, slurry traversing valve 2 is discharged from escape pipe 1, after the air emptying till having slurries to flow out, close slurry traversing valve 2, grouting finishes.
Claims (1)
1. shallow bore hole hole internal-circulation type grouting dedicated ports device, it is characterized in that: interior cover feed pipe for mortar is communicated with feed pipe for mortar by slurry-inlet valve, be provided with the overcoat return pipe in interior cover feed pipe for mortar outside, overcoat return pipe outer wall and grout hole matched in clearance, overcoat return pipe and interior cover feed pipe for mortar are fixing in the outer end sealing, and the grout hole outside of overlapping return pipe outside is communicated with escape pipe by slurry traversing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200938878U CN201459678U (en) | 2009-06-26 | 2009-06-26 | Special orifice device for circulating grouting in shallow bored hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200938878U CN201459678U (en) | 2009-06-26 | 2009-06-26 | Special orifice device for circulating grouting in shallow bored hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201459678U true CN201459678U (en) | 2010-05-12 |
Family
ID=42387031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200938878U Expired - Lifetime CN201459678U (en) | 2009-06-26 | 2009-06-26 | Special orifice device for circulating grouting in shallow bored hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201459678U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112647507A (en) * | 2020-12-18 | 2021-04-13 | 长江勘测规划设计研究有限责任公司 | Bidirectional slurry supply hole internal circulation type contact grouting system and use method thereof |
-
2009
- 2009-06-26 CN CN2009200938878U patent/CN201459678U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112647507A (en) * | 2020-12-18 | 2021-04-13 | 长江勘测规划设计研究有限责任公司 | Bidirectional slurry supply hole internal circulation type contact grouting system and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100512 |