CN103412498A - Cable joint environmental control method in tunnel - Google Patents
Cable joint environmental control method in tunnel Download PDFInfo
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- CN103412498A CN103412498A CN2013103649832A CN201310364983A CN103412498A CN 103412498 A CN103412498 A CN 103412498A CN 2013103649832 A CN2013103649832 A CN 2013103649832A CN 201310364983 A CN201310364983 A CN 201310364983A CN 103412498 A CN103412498 A CN 103412498A
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- tunnel
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- environment control
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Abstract
The invention relates to a cable joint environmental control method in a tunnel. The cable joint environmental control method in the tunnel is characterized by comprising the following steps that (1) a joint shed is built; (2) a cable joint environmental processing device carries out processing on the air in the joint shed; (3) dust prevention treatment is carried out on joint personnel who get in and get out of the joint shed. Compared with the prior art, the cable joint environmental control method in the tunnel has the advantages of prolonging the service life of a cable joint and improving the reliability of the cable joint.
Description
Technical field
The present invention relates to a kind of cable splice environment control method, especially relate to a kind of tunnel inner cable joint environment control method.
Background technology
The electric power tunnel degree of depth is between 10～30 meters, and in tunnel, environment has following characteristics:
Temperature variation is little
Because the tunnel degree of depth is darker, apart from cool in summer and warm in winter in Jiao Yuan， tunnel, ground, temperature maintains 20 degrees centigrade of left and right substantially, and difference variation is less.
High humidity
Because the Shanghai underground water source is abundant, soil moisture content is higher, and temperature and surface temperature are poor larger in adding tunnel, when in ground air and tunnel, air exchanges by active well, easily in tunnel, form condensate water.Therefore in tunnel, humidity is larger, generally all is in more than 90%.
Dust is serious
The dust stayed in constructing tunnel, the mud particles of bringing into while bringing the dust in tunnel and personnel's access tunnel during cable laying into etc. usually can be deposited in tunnel ground, and when opening tunneling well inner blower and carry out tunnel ventilation, dust just can dispel in air.The result of on-the-spot test airblrne particulates concentration is (particle concentration of particle diameter 1.0 μ m of take be with reference to): particle diameter 1.O μ m >=35000PC/ liter.
Because the underground substation environment is more severe, easily cable splice is destroyed.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of tunnel inner cable joint environment control method for the defect that overcomes above-mentioned prior art existence.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of tunnel inner cable joint environment control method, is characterized in that, comprises the following steps:
1) build the joint canopy;
2) cable splice environmental treatment equipment interconnection head canopy Air is processed;
3) to the joint personnel of the turnover joint canopy processing of preventing dust.
The described joint canopy of building is specially:
Using aerated film to build the joint canopy in joint area is closed space fully.
Described aerated film adopts fire proofing, and on surface, scribbles water barrier and sealant, and the width of aerated film is 1.2m, identical with the spacing of tunnel arc support.
The shape of described aerated film is according to tunnel structure and different, and aerated film is made into ∩ shape when the pushing method tunnel cross-section, when the shield tunnel section, adopts aerated film to be made into ワ shape.
Described cable splice environmental treatment equipment comprises controller and the purifying dust-removing device be connected with controller respectively, well heater, blower fan, dehumidifier and regeneration wind interchanger, described purifying dust-removing device, well heater, blower fan, dehumidifier, regeneration wind interchanger connect successively, described purifying dust-removing device is connected with the gas outlet of joint canopy, and described regeneration wind interchanger is connected with the air intake opening of joint canopy.
Described joint personnel to turnover joint canopy prevent dust to process and are specially;
On walkway in the joint canopy, lay plastic floor and antistatic film, the joint personnel change shoes and garment for clean room special-purpose in the joint canopy before entering the joint canopy outside the joint canopy.
Compared with prior art, the present invention has serviceable life and the reliability that has improved cable splice, air in the cable splice canopy is inhaled into environmental treatment equipment, air is in passing through the process of each mini-plant, equipment carries out respectively the processing such as dedusting, temperature adjustment, wet down by the air of suction, the air that to handle well again is blown in the joint canopy again, air in the continuous butt junction canopy of environmental treatment equipment carries out circular treatment, make the air in the joint canopy constantly be purified, finally reach standard-required.
Embodiment
The present invention is described in detail below in conjunction with specific embodiment.
A kind of tunnel inner cable joint environment control method comprises the following steps:
Build the joint canopy
Using aerated film to build the joint canopy in joint area is closed space fully, like this air in the joint canopy and the air insulated in tunnel are come, the air of butt junction canopy is processed again, make the interior air of joint canopy can meet the environmental requirement of joint, air in the joint canopy can not directly exchange with the outer air of joint canopy simultaneously, has avoided the environment in the joint canopy again to be destroyed by the untreated air in outside.Aerated film adopts fire proofing and through coated especially, has that lightweight, good waterproof performance, impermeability are good, elasticity and characteristics such as elastic recovery properties is good, heat-proof combustion-resistant.The about 1.2m of the width of aerated film is identical with the spacing of tunnel arc support.
The shape of aerated film is according to tunnel structure and different.The pushing method tunnel cross-section, tunnel diameter 3.5m, walkway is in the middle of tunnel, and 500 kv cables are positioned at the both sides of passage, and the joint area space is larger.According to the every aerated film of shape in tunnel, be made into ∩ shape.After the joint canopy was put up, whole pushing method tunnel section was closed, and twice 500 kv cables all are included in the joint canopy.
The shield tunnel sectional drawing, tunnel diameter 5.5m, be divided into upper and lower 2 layers, 500 kv cables are positioned at the centre position of tunnel lower floor, between two loop 500 kv cables, separate with cement post, a walkway, joint area space less are respectively arranged in the cement post both sides.According to the every aerated film of shape in tunnel, be made into and every aerated film in shield tunnel is ワ shape.After the joint canopy is put up, only have that time 500 kv cables of wanting joint to be included in the joint canopy, another time 500 kv cables and walkway are unaffected.
Use 500 kv cable joint environment treatment facilities
By building the joint canopy, cut off the inside and outside circulation of air of joint canopy, but now the humiture of joint canopy internal and external environment and cleanliness factor still are more or less the same.What next will do is exactly that the interior air of butt junction canopy is processed, and can arrive the environmental requirement of joint.
Engineering has adopted independent research " joint environment treatment facility ", air in the joint canopy is inhaled into environmental treatment equipment, air is in passing through the process of each mini-plant, equipment carries out respectively the processing such as dedusting, temperature adjustment, wet down by the air of suction, then the air that will handle well is blown in the joint canopy again.Air in the continuous butt junction canopy of environmental treatment equipment carries out circular treatment, makes the air in the joint canopy constantly be purified, and finally reaches standard-required.
The target setting of environmental treatment equipment is: in the joint perform region, temperature is controlled at 21-28 ℃, and relative humidity is controlled below 75%, and cleanliness factor reaches 9 grades and purifies requirement, and airborne rises with interior (particle diameter 1.O μ m) at 8320PC/.
According to tunnel actual environment situation, after having used environmental treatment equipment, the contrast of the environmental parameter of joint area is as shown in the table:
According to the result of using, can find out, the temperature in the joint canopy can be controlled at 22-25 ℃, and humidity can be controlled at 50-70%, the concentration particle diameter 1.O μ m of airblrne particulates≤450OPC/ liter, and cleanliness factor has arrived more than 9 grades.Such environment is to be applicable to 500 kv cable joints fully.
Joint personnel's activity is controlled
In the situation that the joint canopy is airtight, the environment for use treatment facility can be so that the air in the joint canopy remains on the state of a higher standard.But actual conditions are, the joint canopy can not be avoided joint personnel's turnover, and what personnel entered will bring impact to the joint environment.Therefore also the corresponding Corresponding Countermeasures of having formulated reduces the impact that personnel activity's butt junction environment causes as much as possible.Mainly contain: on the walkway in the joint canopy, lay plastic floor and antistatic film, being deposited on dust on passage, raising and be sprinkling upon in air when the personnel of preventing walk about; The joint personnel change shoes and garment for clean room special-purpose in the joint canopy before entering the joint canopy outside the joint canopy, prevent from bringing the dust be attached to it into the joint canopy.Every garment for clean room all can only be used 1 time, must not recycle; In the joint process, forbid that personnel frequently pass in and out the joint canopy.While making a phase joint, joint personnel's quantity general control is 4-5 people, and the personnel of preventing talk, breathe and cause local environment humidity to increase.
500 kv cable intermediate heads or a brand-new field, the butt junction environment also has very high requirement, particularly under tunnel environment, carries out 500 kilovolts of intermediate heads, does not also have what ready-made experience to use for reference.But by practice of construction, proved, after in use, building the measures such as joint canopy and environmental treatment equipment, greatly improved the environment in tunnel own, guaranteed carrying out smoothly of 500 kilovolts of intermediate heads, also for from now on construction, accumulated experience.
Claims (6)
1. a tunnel inner cable joint environment control method, is characterized in that, comprises the following steps:
1) build the joint canopy;
2) cable splice environmental treatment equipment interconnection head canopy Air is processed;
3) to the joint personnel of the turnover joint canopy processing of preventing dust.
2. a kind of tunnel according to claim 1 inner cable joint environment control method, is characterized in that, the described joint canopy of building is specially:
Using aerated film to build the joint canopy in joint area is closed space fully.
3. a kind of tunnel according to claim 2 inner cable joint environment control method, it is characterized in that, described aerated film adopts fire proofing, and on surface, scribbles water barrier and sealant, the width of aerated film is 1.2m, identical with the spacing of tunnel arc support.
4. a kind of tunnel according to claim 3 inner cable joint environment control method, it is characterized in that, the shape of described aerated film is according to tunnel structure and different, and aerated film is made into ∩ shape when the pushing method tunnel cross-section, when the shield tunnel section, adopts aerated film to be made into ワ shape.
5. a kind of tunnel according to claim 1 inner cable joint environment control method, it is characterized in that, described cable splice environmental treatment equipment comprises controller and the purifying dust-removing device be connected with controller respectively, well heater, blower fan, dehumidifier and regeneration wind interchanger, described purifying dust-removing device, well heater, blower fan, dehumidifier, regeneration wind interchanger connect successively, described purifying dust-removing device is connected with the gas outlet of joint canopy, and described regeneration wind interchanger is connected with the air intake opening of joint canopy.
6. a kind of tunnel according to claim 1 inner cable joint environment control method, is characterized in that, described joint personnel to turnover joint canopy prevent dust to process and are specially:
On walkway in the joint canopy, lay plastic floor and antistatic film, the joint personnel change shoes and garment for clean room special-purpose in the joint canopy before entering the joint canopy outside the joint canopy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103649832A CN103412498A (en) | 2013-08-20 | 2013-08-20 | Cable joint environmental control method in tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103649832A CN103412498A (en) | 2013-08-20 | 2013-08-20 | Cable joint environmental control method in tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103412498A true CN103412498A (en) | 2013-11-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103649832A Pending CN103412498A (en) | 2013-08-20 | 2013-08-20 | Cable joint environmental control method in tunnel |
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| Country | Link |
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| CN (1) | CN103412498A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370061A (en) * | 2015-11-26 | 2016-03-02 | 国网福建省电力有限公司 | Moveable purification treatment device for installing high-voltage cable accessories |
| CN104466799B (en) * | 2014-10-29 | 2017-10-03 | 国家电网公司 | Cable tunnel construction servicing unit |
| CN110857592A (en) * | 2018-08-23 | 2020-03-03 | 平高集团有限公司 | Inflatable dustproof operation canopy |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070159326A1 (en) * | 2005-12-22 | 2007-07-12 | Quist Gregory M | Methods, apparatuses, and systems for monitoring environmental parameters within an enclosure |
| KR20100089274A (en) * | 2009-02-03 | 2010-08-12 | 홍순학 | Management system for cable tunnels |
| CN102200766A (en) * | 2010-03-26 | 2011-09-28 | 上海市电力公司 | 500kV cable joint work environment control system |
| CN202383490U (en) * | 2011-12-06 | 2012-08-15 | 山东电力集团公司青岛供电公司 | Cable tunnel environment monitoring devcie |
| CN102841584A (en) * | 2012-08-24 | 2012-12-26 | 华北电力大学 | Cable tunnel environment parameter monitoring system |
-
2013
- 2013-08-20 CN CN2013103649832A patent/CN103412498A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070159326A1 (en) * | 2005-12-22 | 2007-07-12 | Quist Gregory M | Methods, apparatuses, and systems for monitoring environmental parameters within an enclosure |
| KR20100089274A (en) * | 2009-02-03 | 2010-08-12 | 홍순학 | Management system for cable tunnels |
| CN102200766A (en) * | 2010-03-26 | 2011-09-28 | 上海市电力公司 | 500kV cable joint work environment control system |
| CN202383490U (en) * | 2011-12-06 | 2012-08-15 | 山东电力集团公司青岛供电公司 | Cable tunnel environment monitoring devcie |
| CN102841584A (en) * | 2012-08-24 | 2012-12-26 | 华北电力大学 | Cable tunnel environment parameter monitoring system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466799B (en) * | 2014-10-29 | 2017-10-03 | 国家电网公司 | Cable tunnel construction servicing unit |
| CN105370061A (en) * | 2015-11-26 | 2016-03-02 | 国网福建省电力有限公司 | Moveable purification treatment device for installing high-voltage cable accessories |
| CN110857592A (en) * | 2018-08-23 | 2020-03-03 | 平高集团有限公司 | Inflatable dustproof operation canopy |
| CN110857592B (en) * | 2018-08-23 | 2021-08-06 | 平高集团有限公司 | Inflatable dustproof operation canopy |
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Application publication date: 20131127 |