CN109723384A - With pipe at well dewatering construction engineering method - Google Patents
With pipe at well dewatering construction engineering method Download PDFInfo
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- CN109723384A CN109723384A CN201910083167.1A CN201910083167A CN109723384A CN 109723384 A CN109723384 A CN 109723384A CN 201910083167 A CN201910083167 A CN 201910083167A CN 109723384 A CN109723384 A CN 109723384A
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Abstract
The present invention provides with pipe, at well dewatering construction engineering method, easy to operate, quickly, dewatering effect is good, securely and reliably, greatly accelerates the construction speed of bored tunnel, reduces the construction cost of bored tunnel for construction；The present invention provides a kind of construction by the way that slot is as water seepage hole in well casing tube wall (chimney filter section), and at water seepage hole wide 2mm, long 20cm, circumferentially disposed 3, longitudinal pitch 60cm, whole well casings arrange that water seepage hole carries out slot processing；Shoe is welded in head section well casing bottom, and head section well casing bottom is covered on expansion bit by shoe；Well casing declines with drill bit drilling when construction, stops drilling when head section well casing drops to certain altitude, installs second well casing, it is welded to connect between well casing by pipe sleeve, second well casing continues to creep into after installing, so circulation pipe-following drilling, until designed elevation, forms well；Well casing is wrapped up using the coarse granule of wellhole periphery remnants as filtrate；Operation of the present invention is easy, and construction is quick.
Description
Technical field
The present invention relates to underground construction technology fields, especially with pipe at well dewatering construction engineering method.
Background technique
With expanding rapidly for China's city size, the city for building subway engineering is more and more, and Subway Tunnel is common to be applied
Work method has cut and cover method, subsurface excavation method and shield method, and subsurface excavation method is still being widely used as the main method that section is constructed.But tunneling
Underground water is frequently encountered when construction, is especially encountered that granular media shape is severely-weathered and the unfavorable geological conditions such as completely weathered granite, is met water
Phenomena such as easily softening, disintegration, intensity drastically reduce, and easy unstability occurs chip off-falling, collapses, the presence of underground water considerably increases tunneling
Difficulty of construction and security risk when operation, if underground water dropped to before tunneling starts operation tunnel bottom or less 0.5-1m with
Under, guarantee anhydrous excavation operation, then can greatly speed up engineering construction progress, greatly reduction security risk, while work can be improved again
Civilized construction degree in journey construction quality and hole；If level of ground water control not can guarantee below tunnel bottom safe and normal
Construction, control it is improper will cause tunnel vault collapse, face gush the serious consequences such as mud.Dewatering has to meet building work
Journey foundation pit technical specification related code requirement with subterranean railway engineering.
Existing some dewatering construction engineering methods are complex, and constructional difficulties can tie down construction period.
Summary of the invention
For above situation, for the defect for overcoming the prior art, the present invention provides, at well dewatering construction engineering method, grasp with pipe
Make simplicity, quickly, dewatering effect is good, securely and reliably, greatly accelerates the construction speed of bored tunnel, reduces tunneling tunnel for construction
The construction cost in road.
The present invention provides a kind of construction and includes the following steps；1, according to geotechnical investigation geological conditions, dewatering well is determined
Quantity, depth, spacing and horizontal layout.
2, the location of well；According to the position for the well location map that dewatering design scheme provides, field lofting determines well location and well spacing.
Well location deviation≤50mm under normal circumstances, if well location need to be adjusted by meeting special circumstances (such as underground obstacle, ground or aerial barrage)
When, it, should appropriate adjustment according to field condition in the case where guaranteeing dewatering effect.
3, drilling machine is in place: being bored using crawler type, adjusts the flatness of drilling machine after drilling machine is in place by four hydraulic legs
With the verticality of boring tower, hydraulic locking precisely is carried out after contraposition, to guarantee that drilling machine installation is steady.
4, creep into and follow up well casing；
4.1, first to well casing, (well casing uses 168 steel pipe of φ, wall thickness 3mm, length 6m, slot on tube wall (chimney filter section) before construction
As water seepage hole, at water seepage hole wide 2mm, long 20cm, circumferentially disposed 3, longitudinal pitch 60cm, whole well casings arrange water seepage hole)
Slot processing is carried out, is processed connecting pipe box (prefabricated spare)；
4.2, shoe is welded in head section well casing bottom, and head section well casing bottom is covered on expansion bit by shoe, top is logical
Connector is crossed to be fixed on drilling rod；Well casing declines with drill bit drilling when construction, when head section well casing drops to certain altitude
Stopping drilling, second well casing is installed, is welded to connect between well casing by pipe sleeve, second well casing continues to creep into after installing,
So circulation pipe-following drilling, until designed elevation, forms well；
4.3, well casing is wrapped up using the coarse granule of wellhole periphery remnants as filtrate；Should follow up quantity in drilling process according to well casing
Record well depth, final well depth are measured with lining rope in time, and well depth should be not less than projected depth.
5, water pump and water pipe are installed；Lift is selected to be not less than 6m not less than 60m, displacement3The water pump of/h, water pipe select not
PVC water supplying pipe less than 50mm, inspection comprehensively before installing, can even running after guarantee installation；Water pump bottom distance is not less than 3m, uses
Steel wire hang is fixed.
6, start precipitation；Examination pumping is first carried out after being installed, mud pump drainage in well is clean, and knot is taken out in examination when water outlet change is clear
Beam starts to carry out formal precipitation；Dewatering well answers continuous pumpage after coming into operation, and should not be interrupted halfway, and need repairing more water-change pump
When, it should carry out one by one, while increasing the monitoring frequency of SEA LEVEL VARIATION.It draws water after beginning, should check whether drainage pipeline is smooth one by one
It is logical, whether there is or not leakage phenomenon, as joint or drainpipe leakage should do over again or repair.
Operation of the present invention is easy, and quickly, dewatering effect is good, securely and reliably, greatly accelerates the construction of bored tunnel for construction
Progress reduces the construction cost of bored tunnel, and whole economic efficiency and social benefit are significant, and construction technology has reached industry
Advanced level.
Detailed description of the invention
Fig. 1 is drilling well of the present invention with pipe schematic diagram.
Fig. 2 is construction process flow diagram of the present invention.
Fig. 3 is water pump scheme of installation of the present invention.
Fig. 4 is well casing side wall expanded view of the present invention.
Specific embodiment
Below in conjunction with attached drawing 1-4, specific embodiments of the present invention will be described in further detail.
This engineering method is suitable for suitable for grittiness clay layer, strong (complete) weathered rock formation of granular media shape, strong (complete) decomposed rock of cataclastic shape
Precipitation in layer.
This engineering method uses following steps:
1, according to geotechnical investigation geological conditions, quantity, depth, spacing and the horizontal layout of dewatering well are determined.
2, the location of well；According to the position for the well location map that dewatering design scheme provides, field lofting determines well location and well spacing.
Well location deviation≤50mm under normal circumstances, if well location need to be adjusted by meeting special circumstances (such as underground obstacle, ground or aerial barrage)
When, it, should appropriate adjustment according to field condition in the case where guaranteeing dewatering effect.
3, drilling machine is in place: being bored using crawler type, adjusts the flatness of drilling machine after drilling machine is in place by four hydraulic legs
With the verticality of boring tower, hydraulic locking precisely is carried out after contraposition, to guarantee that drilling machine installation is steady.
4, creep into and follow up well casing 2；
4.1,168 steel pipe of φ first is used to well casing 2(well casing 2 before construction, wall thickness 3mm, length 6m are cut on tube wall (chimney filter section)
It stitches and is used as water seepage hole 4, at water seepage hole 4 width 2mm, long 20cm, circumferentially disposed 3, longitudinal pitch 60cm, whole well casings 2 arrange infiltration
Water hole 4) slot processing is carried out, it processes connecting pipe box (prefabricated spare)；
4.2, shoe 3 is welded in head section 2 bottom of well casing, and head is saved into 2 bottom of well casing by 3 sets of shoe on expansion bit 1, top
Portion is fixed on drilling rod by connector；Well casing 2 declines with the drilling of drill bit 1 when construction, when head section well casing 2 drops to centainly
Stop drilling when height, second well casing 2 is installed, is welded to connect between well casing 2 by pipe sleeve, after second well casing 2 installs
Continue to creep into, so circulation pipe-following drilling, until designed elevation, forms well；
4.3, well casing 2 is wrapped up using the coarse granule of wellhole periphery remnants as filtrate；Should follow up number in drilling process according to well casing 2
Record well depth, final well depth are measured amount with lining rope in time, and well depth should be not less than projected depth.
5, water pump and water pipe are installed；Lift is selected to be not less than 6m not less than 60m, displacement3The water pump of/h, water pipe select not
PVC water supplying pipe less than 50mm, inspection comprehensively before installing, can even running after guarantee installation；Water pump bottom is not less than apart from shaft bottom
3m is fixed with steel wire hang.
6, start precipitation；Examination pumping is first carried out after being installed, mud pump drainage in well is clean, and knot is taken out in examination when water outlet change is clear
Beam starts to carry out formal precipitation；Dewatering well answers continuous pumpage after coming into operation, and should not be interrupted halfway, and need repairing more water-change pump
When, it should carry out one by one, while increasing the monitoring frequency of SEA LEVEL VARIATION.It draws water after beginning, should check whether drainage pipeline is smooth one by one
It is logical, whether there is or not leakage phenomenon, as joint or drainpipe leakage should do over again or repair.
This engineering method in specific application, 1, according to geotechnical investigation geological conditions, determine the quantity, depth, spacing of dewatering well
And horizontal layout；Scene need to carry out the preparation of personnel, mechanical equipment and material in advance；It will be in advance by every mouthful before wellbore construction
Well casing 2 completes the process.
Material selection φ 168mm steel pipe, wall thickness 3mm, joint length 6m, quantity are stocked up according to design well total depth, and
It is appropriate more than needed；Steel sleeve is processed, length 20cm using the 168mm steel pipe scene φ, and quantity is processed according to scene；Pipe
Boots 3, be finished product accessory, matched with steel pipe, internal diameter be φ 140mm, outer diameter top is 1mm smaller than pipe diameter, lower part with
Outer diameter of steel pipes is consistent, and quantity is equipped with according to live dewatering well design quantity, and each dewatering well is equipped with 1 shoe 3.
2, the location of well；According to the position for the well location map that dewatering design scheme provides, field lofting determines well location and well spacing；
Well location deviation≤50mm under normal circumstances, if well location need to be adjusted by meeting special circumstances (such as underground obstacle, ground or aerial barrage)
When, it, should appropriate adjustment according to field condition in the case where guaranteeing dewatering effect.
3, drilling machine is in place: being bored using crawler type, adjusts the flatness of drilling machine after drilling machine is in place by four hydraulic legs
With the verticality of boring tower, hydraulic locking precisely is carried out after contraposition, to guarantee that drilling machine installation is steady.
4, creep into and follow up well casing；
In drilling process, three-way pipeline is installed in drilling rod upper end, high-pressure blast and work are realized by the three-way pipeline on drilling rod top
The synchronous supply of journey water, supplying water carries out that suitably wet (water supply is not generate dust in drilling process but not to the soil body
Formed subject to mud), air compressor machine is sent high-pressure blast to foot of hole by air supply tube, by fine graineds such as powder clays in hole along well
Gap blowout between pipe 2 and the borehole wall, and coarse granule (quartz sand etc.) package 2 periphery of well casing is left, automatically form dewatering well
Filter layer.
The powder clay on 2 periphery of well casing, fine grained must all be blown out when drilling, cannot blindly accelerate rate of penetration；Sternly
Lattice control hole diameter, well depth and well spacing by design requirement；A well is often broken into, Yao Jinhang quality examination is checked and accepted, Aperture deviation≤
10cm, perpendicularity deviation≤5%, well depth deviation≤20cm.
5, water pump and water pipe are installed；Lift is selected to be not less than 6m not less than 60m, displacement3The water pump of/h, water pipe select not
PVC water supplying pipe less than 50mm, inspection comprehensively before installing, can even running after guarantee installation；Water pump bottom is not less than apart from shaft bottom
3m is fixed with steel wire hang.
6, start precipitation；Examination pumping is first carried out after being installed, mud pump drainage in well is clean, and knot is taken out in examination when water outlet change is clear
Beam starts to carry out formal precipitation；Dewatering well answers continuous pumpage after coming into operation, and should not be interrupted halfway, and need repairing more water-change pump
When, it should carry out one by one, while increasing the monitoring frequency of SEA LEVEL VARIATION.It draws water after beginning, should check whether drainage pipeline is smooth one by one
It is logical, whether there is or not leakage phenomenon, as joint or drainpipe leakage should do over again or repair.
Running check drinking-water pipe and water pump is answered to have fault-free during drawing water, one it is found that should repair or replace in time, and answer
Running check is drawn water situation, prevent it is anhydrous burn out water pump, influence dewatering effect.
There must be special messenger to be responsible in all well-diggings and pump process, carry out into well record and the record that draws water is to guarantee into well
It quality and draws water normal.
Well pumping test must be carried out before large-area precipitation, whether verifying precipitation scheme is reasonable, and whether dewatering effect is obvious,
Otherwise precipitation scheme should be adjusted in time.
Surface subsidence caused by prevent from taking out of stratum thin particulate matter because of pumping underground water, will carry out sand content to the water of extraction
Detection: coarse sand content < 1/50000, middle sand content < 1/20000, fine content < 1/10000.It (draws water for the first time normal rear) for the first time
After sand content detection is qualified, sand content detection is periodically carried out by no more than 3 moon interval time during drawing water, is answered under abnormal conditions
According to circumstances encryption detection number.It draws water after beginning, should check water yield of well, water outlet sand content one by one.When sand content is excessive,
Water pump can above be mentioned, if sand content is still larger, Ying Chongxin well-flushing is discarded when still undesirable after well-flushing, digs a well again.
This engineering method construction equipment is simple, easy to operate, and construction technology is simple, and construction efficiency is high, and well casing 2 does not have to wrap up close mesh
Net, does not have to special setting rubble loaded filter, and construction efficiency is high.Common setting sand, rubble loaded filter dewatering well general 3 days or so at
A well, the engineering method at 1 ~ 2 mouthful of well, are not easy plugging, dewatering effect is good, and construction area is few, and environmental pollution is small, environment protecting daily
It is good.
This engineering method pore-forming is dry drill method, does not need pulping in work progress, does not need to carry out mud circulation and outward transport processing；
High-pressure blast is supplied by three-way pipeline in drilling process and uses water on a small quantity, and water mainly plays the wet drilling soil body, prevents
Dust polluting environment is generated in drilling process and influences the health of operating worker.Therefore this engineering method construction area is few, environment
Pollute small, operating condition is good, and whole environment protecting is good.
Operation of the present invention is easy, and quickly, dewatering effect is good, securely and reliably, greatly accelerates the construction of bored tunnel for construction
Progress reduces the construction cost of bored tunnel, and whole economic efficiency and social benefit are significant, and construction technology has reached industry
Advanced level.
Claims (6)
1. one kind is with pipe at well dewatering construction engineering method, comprising the following steps:
Step 1: determining quantity, depth, spacing and the horizontal layout of dewatering well according to geotechnical investigation geological conditions；
Step 2: the location of well；According to the position for the well location map that dewatering design scheme provides, field lofting is determined between well location and well
Away from,
Well location deviation≤50mm under normal circumstances, if meeting special circumstances (such as underground obstacle, ground or aerial barrage) needs to adjust
It, should appropriate adjustment according to field condition in the case where guaranteeing dewatering effect when well location；
Step 3: drilling machine is in place: being bored using crawler type, adjust the flatness of drilling machine after drilling machine is in place by four hydraulic legs
With the verticality of boring tower, hydraulic locking precisely is carried out after contraposition, to guarantee that drilling machine installation is steady；
Step 4: drilling and follow-up well casing (2)；
Slot processing first is carried out to well casing (2) before construction, is processed connecting pipe box (prefabricated spare)；
It is covered by shoe (3) in expansion bit in head section well casing (2) bottom welding shoe (3), and by section well casing (2) bottom head
(1) on, top is fixed on drilling rod by connector；Well casing (2) declines with drill bit (1) drilling when construction, when head saves well
Pipe (2) stops drilling when dropping to certain altitude, installs second well casing (2), is welded to connect between well casing (2) by pipe sleeve,
Second well casing (2) continues to creep into after installing, so circulation pipe-following drilling, until designed elevation, forms well；
Well casing (2) are wrapped up using the coarse granule of wellhole periphery remnants as filtrate；Should follow up number in drilling process according to well casing (2)
Record well depth, final well depth are measured amount with lining rope in time, and well depth should be not less than projected depth；
Step 5: installation water pump and water pipe；
Step 6: starting precipitation；Examination pumping is first carried out after being installed, mud pump drainage in well is clean, and examination is taken out when water outlet change is clear
Terminate, starts to carry out formal precipitation；Dewatering well answers continuous pumpage after coming into operation, and should not be interrupted halfway, need repairing and replace water
When pump, it should carry out one by one, while increasing the monitoring frequency of SEA LEVEL VARIATION；It draws water after beginning, whether should check drainage pipeline one by one
It is unimpeded, whether there is or not leakage phenomenon, as joint or drainpipe leakage should do over again or repair.
2. one kind according to claim 1 is with pipe at well dewatering construction engineering method, which is characterized in that the well casing (2) is adopted
With 168 steel pipe of φ, wall thickness 3mm, length 6m, slot is as water seepage hole (4) on tube wall (chimney filter section), water seepage hole (4) width 2mm,
Long 20cm, at circumferentially disposed 3, longitudinal pitch 60cm, whole well casings (2) arrange water seepage hole (4).
3. one kind according to claim 1 is with pipe at well dewatering construction engineering method, which is characterized in that the pump suction sump is raised
Journey is not less than 6m not less than 60m, displacement3The water pump of/h, water pipe selection are not less than the PVC water supplying pipe of 50mm, before installing comprehensively
It checks, guarantees energy even running after installation；Water pump bottom is not less than 3m apart from shaft bottom, is fixed with steel wire hang.
4. one kind according to claim 1 is with pipe at well dewatering construction engineering method, which is characterized in that the steel sleeve, benefit
It is processed with the 168mm steel pipe scene φ, length 20cm, quantity is processed according to scene.
5. one kind according to claim 1 is with pipe at well dewatering construction engineering method, which is characterized in that the shoe (3) is
Finished product accessory is matched with well casing (2), and internal diameter is φ 140mm, and outer diameter top is 1mm smaller than pipe diameter, lower part and steel pipe
Outer diameter is consistent, and quantity is equipped with according to live dewatering well design quantity, and each dewatering well is equipped with 1 shoe (3).
6. one kind according to claim 1 is with pipe at well dewatering construction engineering method, which is characterized in that necessary when the described drilling
The powder clay on well casing (2) periphery, fine grained are all blown out, rate of penetration cannot be blindly accelerated；Strictly controlled by design requirement
Good hole diameter, well depth and well spacing；A well is often broken into, Yao Jinhang quality examination is checked and accepted, Aperture deviation≤10cm, perpendicularity deviation≤
5%, well depth deviation≤20cm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112227944A (en) * | 2020-08-31 | 2021-01-15 | 中铁十六局集团有限公司 | Dewatering well construction process applied to tunnel construction |
| CN114319403A (en) * | 2022-01-21 | 2022-04-12 | 中水华通工程有限公司 | Construction method for quick well formation of quicksand geological formations |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736732A (en) * | 2009-12-17 | 2010-06-16 | 上海隧道工程股份有限公司 | Pressure and water reduction construction method of ultra-deep foundation pit confined water |
| US20110168443A1 (en) * | 2010-01-13 | 2011-07-14 | Peter Paul Smolka | Bitless Drilling System |
| CN102912806A (en) * | 2012-09-27 | 2013-02-06 | 中交三航局第二工程有限公司 | Construction method of precipitation well |
| CN103147450A (en) * | 2013-03-19 | 2013-06-12 | 成军 | Construction method for plugging partial steel pipe dewatering well by using flange plates for excavation of deep foundation pit |
| CN107476322A (en) * | 2017-08-10 | 2017-12-15 | 魏玉建 | Well-points dewatering automatic servo compensation technique |
| CN207892652U (en) * | 2018-02-05 | 2018-09-21 | 云南工程建设总承包股份有限公司 | A kind of dewatering device of tunnel rich water section |
| CN109137888A (en) * | 2018-08-08 | 2019-01-04 | 中国二十冶集团有限公司 | The dewatering construction method of prefabricated concrete pipe pile supporting construction |
-
2019
- 2019-01-29 CN CN201910083167.1A patent/CN109723384B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736732A (en) * | 2009-12-17 | 2010-06-16 | 上海隧道工程股份有限公司 | Pressure and water reduction construction method of ultra-deep foundation pit confined water |
| US20110168443A1 (en) * | 2010-01-13 | 2011-07-14 | Peter Paul Smolka | Bitless Drilling System |
| CN102912806A (en) * | 2012-09-27 | 2013-02-06 | 中交三航局第二工程有限公司 | Construction method of precipitation well |
| CN103147450A (en) * | 2013-03-19 | 2013-06-12 | 成军 | Construction method for plugging partial steel pipe dewatering well by using flange plates for excavation of deep foundation pit |
| CN107476322A (en) * | 2017-08-10 | 2017-12-15 | 魏玉建 | Well-points dewatering automatic servo compensation technique |
| CN207892652U (en) * | 2018-02-05 | 2018-09-21 | 云南工程建设总承包股份有限公司 | A kind of dewatering device of tunnel rich water section |
| CN109137888A (en) * | 2018-08-08 | 2019-01-04 | 中国二十冶集团有限公司 | The dewatering construction method of prefabricated concrete pipe pile supporting construction |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112227944A (en) * | 2020-08-31 | 2021-01-15 | 中铁十六局集团有限公司 | Dewatering well construction process applied to tunnel construction |
| CN114319403A (en) * | 2022-01-21 | 2022-04-12 | 中水华通工程有限公司 | Construction method for quick well formation of quicksand geological formations |
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| CN109723384B (en) | 2021-03-16 |
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Address after: No.267, 15th Street, Jingkai, Zhengzhou, Henan Province, 450000 Applicant after: CHINA CONSTRUCTION SEVENTH ENGINEERING DIVISION Corp.,Ltd. Address before: 450000 No. 116 Chengdong Road, Jinshui District, Henan, Zhengzhou Applicant before: CHINA CONSTRUCTION SEVENTH ENGINEERING DIVISION Corp.,Ltd. |
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Inventor after: Hou Shunping Inventor after: Hu Lianchao Inventor after: Jin Yang Inventor after: Fan Baoxin Inventor after: Li Xuerui Inventor after: Tian Zhijie Inventor after: Chen Xiaoyang Inventor after: Huang Qi Inventor after: Wu Jingjiang Inventor after: Wang Chao Inventor after: Zhai Derui Inventor after: Laijiang and Haihai Inventor after: Xu Tao Inventor before: Chen Xiaoyang Inventor before: Li Xuerui Inventor before: Huang Qi Inventor before: Wang Chao Inventor before: Zhai Derui Inventor before: Laijiang and Haihai Inventor before: Xu Tao Inventor before: Hu Lianchao Inventor before: Jin Yang Inventor before: Fan Baoxin |
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Effective date of registration: 20210222 Address after: No.267, 15th Street, Jingkai, Zhengzhou, Henan Province, 450000 Applicant after: CHINA CONSTRUCTION SEVENTH ENGINEERING DIVISION Corp.,Ltd. Applicant after: China Construction Seventh Bureau Transportation Construction Co.,Ltd. Applicant after: China Construction Seventh Bureau Construction Development Co.,Ltd. Address before: No.267, 15th Street, Jingkai, Zhengzhou, Henan Province, 450000 Applicant before: CHINA CONSTRUCTION SEVENTH ENGINEERING DIVISION Corp.,Ltd. |
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