CN114718579A - Combined sealing device for drilling construction of freezing pipe of freezing method connecting channel - Google Patents
Combined sealing device for drilling construction of freezing pipe of freezing method connecting channel Download PDFInfo
- Publication number
- CN114718579A CN114718579A CN202210284786.9A CN202210284786A CN114718579A CN 114718579 A CN114718579 A CN 114718579A CN 202210284786 A CN202210284786 A CN 202210284786A CN 114718579 A CN114718579 A CN 114718579A
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- gasket
- sealing
- freezing
- orifice
- orifice device
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
本发明公开了一种用于冻结法连接通道冻结管钻孔施工的组合式密封装置，包括主隧道管片(1)、孔口管(2)、孔口装置(3)、冻结管(4)、第一密封垫(5)、第二密封垫(6)、第二旁通球阀(7)和端部压板(8)；第一密封垫设在孔口装置一端与冻结管间，第一密封垫密封贴合在冻结管表面；第二密封垫设在孔口装置另一端与端部压板间，第二密封垫密封贴合在冻结管的表面上；第一密封垫、第二密封垫、孔口装置和冻结管之间形成密封空腔，第二旁通球阀连接在孔口装置上，密封空腔内通过第二旁通球阀注入密封油脂(10)。本发明能在冻结管与孔口装置之间组合形成多道密封空腔单元，有效提高的密封止水效果，避免外界水土进入隧道内。
The invention discloses a combined sealing device for drilling construction of a freezing pipe connected to a channel by a freezing method, comprising a main tunnel segment (1), an orifice pipe (2), an orifice device (3), and a freezing pipe (4). ), the first gasket (5), the second gasket (6), the second bypass ball valve (7) and the end pressure plate (8); the first gasket is arranged between one end of the orifice device and the freezing pipe, the second A sealing gasket is sealingly attached to the surface of the freezing tube; the second sealing gasket is arranged between the other end of the orifice device and the end pressing plate, and the second sealing gasket is sealingly attached to the surface of the freezing tube; the first sealing gasket, the second sealing gasket A sealing cavity is formed between the gasket, the orifice device and the freezing pipe, the second bypass ball valve is connected to the orifice device, and the sealing grease (10) is injected into the sealing cavity through the second bypass ball valve. The invention can form a multi-channel sealed cavity unit between the freezing pipe and the orifice device, effectively improves the sealing and water-stopping effect, and prevents the outside water and soil from entering the tunnel.
Description
Technical Field
The invention relates to tunnel construction auxiliary equipment, in particular to a combined sealing device for drilling construction of freezing pipes of freezing channels by a freezing method.
Background
During the construction of underground tunnel engineering, underground spaces need to be communicated through connecting channels, and at present, the connecting channels are mostly constructed by adopting the process of 'horizontal freezing method soil body reinforcement and mine underground excavation method construction'. The freezing pipe of the freezing method connecting channel in the prior art is a seamless steel pipe, the clearance in the underground tunnel is limited, the length of the freezing pipe drilled by drilling equipment for one time is limited, the freezing pipe is formed by welding in sections, and the drilling construction sealing device of the freezing pipe is composed of an orifice pipe, a gate valve, an orifice device, a packing, a compressing device and a sealing gasket.
The freezing pipe drilling construction process in the prior art comprises the following steps: firstly, drilling holes (without drilling the segments) in the freezing hole positions of the main tunnel segments according to a design angle, mounting a hole opening pipe after the holes are drilled, fixing the hole opening pipe, then sequentially connecting a sealing gasket, a gate valve, a sealing gasket and a hole opening device, inserting the freezing pipe into the hole opening pipe, placing packing in the hole opening device, and compressing the packing by a compressing device to perform freezing pipe drilling construction.
However, in the prior art, the gate valve needs to be closed after the freezing pipe is pulled out to prevent external water and soil from entering the tunnel, and if the freezing pipe is inserted into the sealing device and is constructed to a certain depth, the freezing pipe cannot be pulled out, so that the gate valve cannot be closed, and the effect of preventing external water and soil from entering the tunnel cannot be achieved. In addition, the water stopping effect of the packing for compressing and stopping water is poor, only the gushing phenomenon and the serious water and soil loss phenomenon can be avoided, complete and effective water stopping cannot be realized, water and soil loss is easily caused in the freezing and drilling stage, the water and soil loss amount is difficult to measure, and the grouting amount is difficult to control when the stratum is lost through grouting compensation in the later stage.
Disclosure of Invention
The invention aims to provide a combined sealing device for drilling construction of a freezing pipe of a freezing method connecting channel, which can be combined between the freezing pipe and an orifice device to form a plurality of sealed cavity units, effectively improve the sealing and water-stopping effect and prevent external water and soil from entering a tunnel.
The invention is realized by the following steps:
a combined sealing device for drilling construction of freezing pipes of a freezing method connecting channel comprises a main tunnel segment, an orifice pipe, an orifice device and a freezing pipe; one end of the orifice pipe is inserted into the main tunnel pipe sheet, and the other end of the orifice pipe extends into the tunnel and is coaxially connected with one end of the orifice device of the annular structure; the freezing pipe coaxially penetrates through the orifice pipe and the orifice device;
the combined sealing device for drilling construction of the freezing pipe of the freezing method connecting channel further comprises a first sealing gasket, a second bypass ball valve and an end pressing plate; the first sealing gasket is fixedly arranged between one end of the orifice device and the freezing pipe and can be attached to the surface of the freezing pipe in a sealing mode; the end pressure plate is arranged at the other end of the orifice device, the second sealing gasket is fixedly arranged between the other end of the orifice device and the end pressure plate, and the second sealing gasket can be attached to the surface of the freezing pipe in a sealing mode; a sealing cavity is formed among the first sealing gasket, the second sealing gasket, the orifice device and the freezing pipe, the second bypass ball valve is connected to the orifice device, and sealing grease is injected into the sealing cavity through the second bypass ball valve.
The first sealing gasket and the second sealing gasket are both in circular ring structures, the edges of the outer rings of the first sealing gasket and the second sealing gasket are flush with the edge of the outer ring of the orifice device, and the edges of the inner rings of the first sealing gasket and the second sealing gasket are bent, deformed and tightly pressed on the surface of the freezing pipe.
The orifice device comprises one or a plurality of orifice device units, the orifice device units are in circular ring structures, the orifice device units are sequentially and coaxially connected, and each orifice device unit is connected with at least one second bypass ball valve.
Every adjacent two orifice device unit between all be equipped with the third and seal up, the sealed pad of third can seal up the laminating on freezing the surface of pipe, the sealed pad of third is located between first sealed pad and the sealed pad of second to separate into a plurality of mutually independent sealed cavity unit with sealed cavity, all pour into through second bypass ball valve in every sealed cavity unit and have sealed grease.
The third sealing gasket is of a circular ring structure, the edge of the outer ring of the third sealing gasket is flush with the edge of the outer ring of the orifice device unit, the edge of the inner ring of the third sealing gasket is bent, deformed and tightly attached to the surface of the freezing pipe, and the bending deformation directions of the first sealing gasket, the second sealing gasket and the third sealing gasket are consistent.
The end pressing plate is of a circular ring structure, the width of a circular ring of the end pressing plate is larger than that of a circular ring of the orifice device, so that the edge of an outer ring of the end pressing plate is flush with that of the outer ring of the orifice device, and the diameter of an inner ring of the end pressing plate is smaller than that of the inner ring of the orifice device and larger than the outer diameter of the freezing pipe.
Compared with the prior art, the invention has the following beneficial effects:
1. because the freezing pipe is provided with the first sealing gasket and the second sealing gasket, a sealing cavity is formed between the freezing pipe and the orifice device, and sealing grease is injected, so that the sealing and water stopping effects between the freezing pipe and the orifice device are improved; simultaneously, further improve the sealed effect that compresses tightly between the sealed pad of first sealed pad and second and the freezing pipe through the bending deformation of the sealed inner circle of first sealed pad and second to effectual sealed stagnant water effect has been guaranteed.
2. The invention can divide the sealing cavity into a plurality of mutually independent sealing cavity units because of the arrangement of the plurality of orifice device units and the third sealing gasket, can dynamically adjust the combination number of the orifice device units according to the water and soil pressure of the stratum outside the tunnel, and form a multi-cavity sealing water stop effect by combination, thereby enlarging the sealing water stop area, having good adaptability, and further improving the sealing effect of the combined sealing device through the bending deformation of the inner ring of the third sealing gasket.
3. The end part pressing plate is arranged, and the diameter of the inner ring of the end part pressing plate is smaller than that of the inner ring of the orifice device, so that the bending direction of the second sealing gasket can be limited through the inner ring of the end part pressing plate, the sealing performance of the sealing cavity is prevented from being influenced by the overturning of the second sealing gasket, and the sealing and water stopping effect is effectively ensured.
4. The invention solves the problems that the gate valve of the sealing device can not stop water in the whole process and the packing tightly presses the water stop effect in the existing freezing pipe drilling construction process, effectively avoids the external water and soil from entering the tunnel and the loss of the external water and soil, does not need the later grouting compensation, ensures the efficiency and the quality of the freezing pipe drilling construction of the freezing method connecting channel, and reduces the construction cost.
Drawings
FIG. 1 is a perspective view of the combined sealing device for drilling a freezing pipe of a freezing passage according to the present invention;
FIG. 2 is an installation sectional view (one orifice fitting unit) of the combined sealing apparatus for freezing pipe drilling construction of freezing connection passage according to the present invention;
FIG. 3 is an enlarged schematic view at A in FIG. 2;
fig. 4 is an installation sectional view (a plurality of orifice device units) of the combined sealing device for freezing pipe drilling construction of a freezing connection passage according to the present invention.
In the figure, 1 main tunnel segment, 2 orifice tubes, 21 first bypass ball valves, 3 orifice devices, 4 freezing tubes, 5 first sealing gaskets, 6 second sealing gaskets, 7 second bypass ball valves, 8 end pressing plates, 9 fixing parts, 10 sealing grease and 11 third sealing gaskets.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1 to 3, a combined sealing device for freezing pipe drilling construction of a freezing method connecting channel comprises a main tunnel segment 1, an orifice pipe 2, an orifice device 3 and a freezing pipe 4; one end of the orifice pipe 2 is inserted into the main tunnel segment 1, and the other end of the orifice pipe 2 extends into the tunnel and is coaxially connected with one end of an orifice device 3 with a circular structure; the freezing pipe 4 coaxially penetrates through the orifice pipe 2 and the orifice device 3, and the freezing pipe 4 penetrates through the main tunnel segment 1 to the outside of the tunnel; the orifice pipe 2 is provided with a first bypass ball valve 21.
The combined sealing device for drilling construction of the freezing pipe of the freezing method connecting channel further comprises a first sealing gasket 5, a second sealing gasket 6, a second bypass ball valve 7 and an end pressing plate 8; the first sealing gasket 5 is fixedly arranged between one end of the orifice device 3 and the freezing pipe 4 through a fixing piece 9, and the first sealing gasket 5 can be in sealing fit with the surface of the freezing pipe 4; the end pressing plate 8 is arranged at the other end of the orifice device 3, the second sealing gasket 6 is fixedly arranged between the other end of the orifice device 3 and the end pressing plate 8 through a fixing piece 9, and the second sealing gasket 6 can be attached to the surface of the freezing pipe 4 in a sealing mode; a sealed cavity is formed among the first sealing gasket 5, the second sealing gasket 6, the orifice device 3 and the freezing pipe 4, the second bypass ball valve 7 is connected to the orifice device 3, and sealing grease 10 is injected into the sealed cavity through the second bypass ball valve 7. Utilize first sealed pad 5 and the sealed 6 double-deck stagnant water effect of formation of filling up of second, inject sealed grease 10 into through second bypass ball valve 7 simultaneously and form common stagnant water in sealed cavity, effectively improve combined sealing device's multiple stagnant water effect, prevent that external water and soil from getting into the tunnel, also avoided soil erosion and water loss.
Preferably, the first sealing gasket 5 and the second sealing gasket 6 are made of rubber; the specifications and the number of the first bypass ball valve 21 and the second bypass ball valve 7 can be adjusted according to actual requirements, the first bypass ball valve 21 can be a 1-inch bypass ball valve, the second bypass ball valve 7 can be a 0.5-inch bypass ball valve, and the two second bypass ball valves 7 can be symmetrically arranged; the fixing member 9 may be a bolt.
The first sealing gasket 5 and the second sealing gasket 6 are both in circular ring structures, the outer ring edges of the first sealing gasket 5 and the second sealing gasket 6 are flush with the outer ring edge of the orifice device 3, and the inner ring edges of the first sealing gasket 5 and the second sealing gasket 6 are bent, deformed and tightly pressed and attached to the surface of the freezing pipe 4. The freezing pipe 4 is reliably compressed by the first sealing gasket 5 and the second sealing gasket 6 which are bent and deformed, the sealing performance of the inner rings of the first sealing gasket 5 and the second sealing gasket 6 is ensured, the sealing performance of a sealing cavity is also ensured, and therefore the water stopping effect is ensured.
Referring to fig. 4, the orifice device 3 includes one or more orifice device units, the orifice device units are in a circular ring structure, the orifice device units are coaxially connected in sequence through a fixing member 9, and each orifice device unit is connected with at least one second bypass ball valve 7. Preferably, the quantity of orifice device unit can increase and decrease according to actual demand, can set up one or more, can increase combined sealing device's sealed area when setting up a plurality of orifice device units to improve sealed stagnant water effect.
Every adjacent two the orifice means unit between all be equipped with the third and seal the pad 11, the sealed pad 11 of third can seal the laminating on freezing the surface of pipe 4, the sealed pad 11 of third is located between first sealed pad 5 and the sealed 6 of second to separate into a plurality of mutually independent sealed cavity unit with sealed cavity, all pour into through second bypass ball valve 7 in every sealed cavity unit and have sealed grease 10. A plurality of cavity device units are combined to form multi-cavity sealing water stop through the third sealing gasket 11, and the sealing cavity units are mutually independent and do not influence each other, so that the safety, effectiveness and sealing performance of sealing water stop are ensured.
The third sealing gasket 11 is of a circular ring structure, the edge of the outer ring of the third sealing gasket 11 is flush with the edge of the outer ring of the orifice device unit, the edge of the inner ring of the third sealing gasket 11 is bent, deformed and tightly attached to the surface of the freezing pipe 4, and the directions of the bending deformation of the first sealing gasket 5, the second sealing gasket 6 and the third sealing gasket 11 are consistent. The third sealing gasket 11 which is deformed by bending is used for reliably pressing the freezing pipe 4, so that the sealing performance and the independence of the sealed cavity unit are ensured, and the sealing water stopping effect of each sealed cavity unit is ensured and improved.
The end pressing plate 8 is of a circular ring structure, the width of the circular ring of the end pressing plate 8 is slightly larger than that of the circular ring of the orifice device 3, so that the edge of the outer ring of the end pressing plate 8 is flush with that of the outer ring of the orifice device 3, and the diameter of the inner ring of the end pressing plate 8 is slightly smaller than that of the inner ring of the orifice device 3 and slightly larger than the outer diameter of the freezing pipe 4. The second sealing gasket 6 is blocked and limited by the inner ring edge of the end pressing plate 8, so that the sealing failure caused by the change of the bending deformation direction of the second sealing gasket 6 is prevented.
Referring to fig. 1 to 4, the installation method of the present invention in the construction of the freezing method connecting passage is:
1. the orifice pipe 2 with the first bypass ball valve 21 is installed on the main tunnel segment 1, and the orifice pipe 2 can be installed by adopting the existing technology, and the detailed description is omitted here.
2. The end of the orifice pipe 2, which is positioned outside the main tunnel segment 1, is connected with a first orifice device unit, an annular first sealing gasket 5 is arranged between the first orifice device unit and the orifice pipe 2, and the first sealing gasket is locked and sealed by a plurality of bolts, namely fixing pieces 9.
The width of the ring of the first gasket 5 can be determined according to the size of the orifice device 3 and the freezing pipe 4, and it is sufficient to ensure that the inner ring of the first gasket 5 is bent and deformed and pressed against the surface of the freezing pipe 4, so as to ensure the sealing performance between the first gasket 5 and the freezing pipe 4.
3. A plurality of orifice device units are sequentially connected to a first orifice device unit to form an orifice device 3, a circular third sealing gasket 11 is arranged between two adjacent orifice device units, and the two adjacent orifice device units are locked and sealed through a plurality of bolts, namely fixing pieces 9. It is also possible to install only one orifice device unit as the orifice device 3.
The width of the ring of the third gasket 11 can be determined according to the size of the orifice device 3 and the freezing pipe 4, and it is sufficient to ensure that the inner ring of the third gasket 11 is bent and deformed and pressed against the surface of the freezing pipe 4, so as to ensure the sealing performance between the third gasket 11 and the freezing pipe 4.
4. A second sealing gasket 6 in the form of a ring is mounted on the last porthole device unit by means of an end pressure plate 8 and is tightly sealed by means of a number of bolts, i.e. fixing elements 9.
The width of the ring of the second gasket 6 can be determined according to the size of the orifice device 3 and the freezing pipe 4, and it is sufficient to ensure that the inner ring of the second gasket 6 is bent and deformed and is pressed against the surface of the freezing pipe 4, so as to ensure the sealing performance between the second gasket 6 and the freezing pipe 4.
5. The freezing pipe 4 penetrates through the orifice pipe 2 and the orifice device 3, a plurality of mutually independent sealed cavity units are formed among the inner wall of the orifice device 3, the outer wall of the freezing pipe 4, the first sealing gasket 5, the second sealing gasket 6 and the third sealing gasket 11, and sealing grease 10 is respectively injected into the sealed cavity units through the second bypass ball valve 7.
6. And drilling construction of the freezing pipe 4 is carried out, and the amount of the sealing grease 10 injected into each sealing cavity unit by the second bypass ball valve 7 can be dynamically adjusted according to the water stopping effect in the drilling construction process.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210284786.9A CN114718579A (en) | 2022-03-22 | 2022-03-22 | Combined sealing device for drilling construction of freezing pipe of freezing method connecting channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210284786.9A CN114718579A (en) | 2022-03-22 | 2022-03-22 | Combined sealing device for drilling construction of freezing pipe of freezing method connecting channel |
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| Publication Number | Publication Date |
|---|---|
| CN114718579A true CN114718579A (en) | 2022-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210284786.9A Pending CN114718579A (en) | 2022-03-22 | 2022-03-22 | Combined sealing device for drilling construction of freezing pipe of freezing method connecting channel |
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| CN (1) | CN114718579A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115822503A (en) * | 2022-11-07 | 2023-03-21 | 北京中煤矿山工程有限公司 | A curvature drilling orifice sealing device |
| CN118959742A (en) * | 2024-10-17 | 2024-11-15 | 南昌轨道交通集团有限公司 | A freezing refrigeration device for shield section freezing construction |
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| CN212775813U (en) * | 2020-06-13 | 2021-03-23 | 永嘉县忠义阀门有限公司 | Gate valve with good sealing effect |
| CN112796699A (en) * | 2020-12-29 | 2021-05-14 | 中煤隧道工程有限公司 | High-pressure blowout preventer with emergency plugging cabin and installation and use methods |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115822503A (en) * | 2022-11-07 | 2023-03-21 | 北京中煤矿山工程有限公司 | A curvature drilling orifice sealing device |
| CN115822503B (en) * | 2022-11-07 | 2026-02-27 | 北京中煤矿山工程有限公司 | A curvature drill hole sealing device |
| CN118959742A (en) * | 2024-10-17 | 2024-11-15 | 南昌轨道交通集团有限公司 | A freezing refrigeration device for shield section freezing construction |
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