CN102493810B - Grouting construction process of pipeline inclined shaft engineering - Google Patents
Grouting construction process of pipeline inclined shaft engineering Download PDFInfo
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- CN102493810B CN102493810B CN2011103901186A CN201110390118A CN102493810B CN 102493810 B CN102493810 B CN 102493810B CN 2011103901186 A CN2011103901186 A CN 2011103901186A CN 201110390118 A CN201110390118 A CN 201110390118A CN 102493810 B CN102493810 B CN 102493810B
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Abstract
The invention discloses a grouting construction process of pipeline inclined shaft engineering. The process comprises the steps of pipeline location survey, on-site chemical loess grout ratio testing, temporary rain prevention and dewatering on the periphery of a well, excavation of an upper well opening and a lower well opening of an inclined shaft, detection and leakage supplementing of an outer anti-corrosive layer of a pipeline, drifting of chemical loess grout, excavation and supporting of a vertical shaft or the inclined shaft, plugging and punning and filling of the lower well opening of the inclined shaft, chemical loess grout mixing, segmental pouring of the chemical loess grout, punning and filling and water prevention of the vertical shaft or the inclined shaft and the upper well opening of the inclined shaft, and landform recovery. The construction process is suitable for engineering treatment of diseases of a pipeline inclined shaft in service, can perform location survey and rectification to the upper well opening and the lower well opening of the pipeline inclined shaft in service, overcomes drifting difficulties, and guarantees construction effects of filling of the lower well opening, segmental grouting amount, intermittence time, punning and filling and water prevention of the upper well opening, landform recovery and the like. The grouting construction process of pipeline inclined shaft engineering guarantees pipeline stability and engineering quality of the pipeline inclined shaft engineering, the construction effects are good, and the engineering diseases are removed. The process is also suitable for inclined shaft construction of a newly-built pipeline.
Description
Technical field
The present invention relates to a kind of pipeline construction technique, particularly a kind of grouting construction process of pipeline inclined shaft engineering.
Background technology
In loess tableland, beam, morphologic region, gully, hypsography is large.If at the steep Kan Chu of Pipeline Crossing Program, take heavy excavation to carry out in-duct installation, volume of earthwork is large, and construction speed is slow, security risk is large, and the erosion and torrent control works difficulty is large, and economic investment is large.Carry out pipeline laying at Canal in Loess Area in recent years and often take the engineerings such as inclined shaft, minor diameter tunnel and adit, above engineering often inner space is narrow and small, after pipeline laying is completed without the constructing operation face.At present, there is no ripe packing material and technique both at home and abroad to the hole between inclined shaft, tunnel, adit and pipeline, cratering and subside to fill with and fill out, thereby cause that pipeline is exposed in the body of hole, thereby swing causes fatigue damage; Underground water flows along hole body inside aperture, at the bottom of hole and sidewall cause and wash away, corrode, subside, may cause the hidden danger such as slope instability at the unsettled and inclined shaft place of pipeline, have very large potential safety hazard.
Summary of the invention
Not enough in order to overcome existing pipeline construction technique, the invention provides a kind of grouting construction process of pipeline inclined shaft engineering.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of grouting construction process of pipeline inclined shaft engineering, is characterized in that, this construction technology comprises following steps:
1). pipeline location survey: first adopt pipe locator to carry out the pipeline location survey before construction, measure inclined shaft up and down well head particular location and pipeline actual
Buried depth;
2). on-the-spot chemical loess grout coordinate ratio test: carry out chemical loess grout coordinate ratio test at the inclined shaft scene, test should be in conjunction with local rock
The chemical loess slurry of the multiple proportioning of the preparation such as soil nature shape, construction seasons, weather, interpolation chemical agent character, inclined shaft length, the gradient
Liquid, mobility, the freezing period by measuring various chemical loess slurries, solidify rear intensity parameter, selects to determine chemical loess slurry
The liquid match ratio, be used for inclined shaft grouting;
3). interim rainproof and draining of well week: interim rainproof measure and all temporary drains of well are set before the upper and lower well head excavation of inclined shaft, face
The time draining ditch depth 50cm, wide 50cm, cut charge for remittance around row's well, is laid in the well head excavation line peripheral;
4). the upper and lower well head of inclined shaft excavation: the upper and lower well head of inclined shaft is excavated, with 0.5m * 0.5m stepped form excavation that faces down from ground, the suitable long 4m of duct orientation, the long 3m of vertical pipe direction, cutting depth lower than pipeline at the bottom of 0.5m;
5). the pipeline external anti-corrosion layer detects and mending-leakage: after the upper and lower well head excavation of inclined shaft, first need to adopt specialty to detect to the pipeline external anti-corrosion layer
Equipment detects, as detects the pipeline external anti-corrosion layer and have wound to leak phenomenon, should in time carry out mending-leakage and process;
6). the drifting of chemical loess slurries: after the upper and lower well head of inclined shaft excavation as find in inclined shaft to exist the disease phenomenon of stopping up and collapse etc.,
In the time of can't unimpeded perfusion loess mud, adopt not higher than 33% low concentration chemistry loess slurries and fill with in inclined shaft from well head on inclined shaft
Annotate, carry out the slurries drifting; As unsuccessful in the slurries drifting, by design excavating shaft or inclined shaft, manually remove after the loess of obstruction again
Carry out the slurries drifting;
7). service shaft or inclined shaft excavation and supporting: service shaft or inclined shaft are arranged on disease inclined shaft middle part, transversely depart from disease
Evil inclined shaft 2m, adopt and be communicated with the tunnel connection, and the service shaft diameter is 1.5m, adopts manually digging hole, the steel reinforced concrete dado supporting;
Inclined shaft adopts the arched door pattern, wide 1.5m, and high 1.75m, its middle and upper part is the semicircle of radius 0.75m, adopts the steel pipe frame supporting;
8). under inclined shaft, well head shutoff and rammer are filled out: under inclined shaft, well head adopts earth bag to pile up shutoff by the side at inclined shaft hole, apart from inclined shaft, goes into the well
The following employing of mouth ground 1m sixteen dirt compaction in layers backfills, its higher slice rams fills out the thick loess of 0.5m, earth's surface 0.5m adopts former ploughing to plant earthen backfill, under inclined shaft, well head adopts earth bag to pile up shutoff by the side at inclined shaft hole, be used for reducing the follow-up loess mud perfusion bottom pressure that retreads, mortar leakage prevention or rush end phenomenon;
9). loess mud is mixed system: according to the selected chemical loess slurries match ratio of the on-the-spot chemical loess grout coordinate ratio test of each inclined shaft, carry out
Slurries are mixed system;
10). subsectin bottler chemistry loess slurries: down pour into from well head on inclined shaft during grouting,, as excavation service shaft or inclined shaft, adopt
With first by the grouting of service shaft or inclined shaft, then again from the packer grouting mode of well head grouting on inclined shaft, between filling process adopts
Have a rest and repeatedly be in the milk;
11). on service shaft or inclined shaft and inclined shaft, well head rams and to fill out: service shaft or inclined shaft are waited to pour into to the chemical loess at the bottom of vertical shaft or inclined shaft
Can ram and fill out after the slurries initial set, ram while filling out and fill out apart from adopting plain loess layering to ram below wellhead ground 4m, on it, 3m adopts two
Eight dirt layerings are rammed and are filled out, then its higher slice rammer is filled out the thick loess of 0.5m, the former cultivated earthen backfill of planting of earth's surface 0.5m employing; Lay one deck waterproof geotextiles apart from wellhead ground 1m in addition;
12). land restoration: after the upper and lower well head of inclined shaft and service shaft well head were ploughed and planted earthen backfill, table section adopted the 5% two-way slope of putting.
Step 10 wherein) to inclined shaft subsectin bottler chemistry loess slurries, once grouting length is no more than 10m, and during greater than 25 °, once grouting length is no more than 5m when the inclined shaft gradient.
Step 10) subsectin bottler chemistry loess slurries are in the milk more than grouting intermittent time 36h more next time.
The invention has the beneficial effects as follows, effectively to pipeline inclined shaft engineering inner void, cratering, subside and fill with the construction of filling out, this construction technology is applicable to the engineering control to in-service pipeline inclined shaft disease, at first this technique carried out accurate location survey to the upper and lower well head of pipeline inclined shaft, overcome the drifting difficulty, guaranteed that time well head packing, packer grouting amount, intermittent time, upper well head ram the quality control of filling out with crucial construction links such as waterproof, land restorations, guarantee the firm and workmanship of the pipeline of pipeline inclined shaft engineering, construction effect is good, has effected a radical cure engineering disease; This technique also is applicable to the slope construction of newly-built pipeline.
Description of drawings
Fig. 1 is embodiment of the present invention Yi De road inclined shaft engineering grouting construction schematic diagram.
The 1-inclined shaft; The upper well head of 2-; Well head under 3-; The 4-service shaft.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
Embodiment one
As shown in Figure 1, this engineering inclined shaft 1 plagioclase 74.5m, 27 °, inclination angle, top layer 3m is that Malan loess, bottom are from orpiment soil, inclined shaft 1 well head height 1.1m, width 1.0m, lay an oil pipeline and an optical cable in inclined shaft 1, oil pipeline is φ 660 steel pipes, and optical cable adopts φ 114 steel pipe outer sleeve protections, and oil pipeline and optical cable are exposed in well; Item collapses in inclined shaft 1 bank bottom, rank, middle part.
Training works carries out according to process sequence of the present invention:
1). pipeline location survey: first adopt pipe locator to carry out the pipeline location survey before construction, measure upper well head 2, lower well head 3 particular locations and the actual buried depth of pipeline of inclined shaft 1;
2). on-the-spot chemical loess grout coordinate ratio test: carry out chemical loess grout coordinate ratio test at inclined shaft 1 scene, test should be in conjunction with the chemical loess slurries of the multiple proportionings of preparation such as local ground proterties, construction seasons, weather, interpolation chemical agent character, inclined shaft 1 length, the gradient, mobility, freezing period by measuring various chemical loess slurries, solidify rear intensity parameter, select to determine chemical loess slurries match ratio, be used for inclined shaft 1 grouting;
3). the rainproof and draining temporarily of well week: interim rainproof measure and all temporary drains of well are set before upper well head 2, lower well head 3 excavations, temporary drainage ditch depth 50cm, wide 50cm, cut row's well charge for remittance on every side, is laid in the well head excavation line peripheral;
4). the upper well head 2 of inclined shaft 1, lower well head 3 excavations: upper well head 2, lower well head 3 are excavated, with 0.5m * 0.5m stepped form excavation that faces down from ground, the suitable long 4m of duct orientation, the long 3m of vertical pipe direction, cutting depth lower than pipeline at the bottom of 0.5m;
5). the pipeline external anti-corrosion layer detects and mending-leakage: after the well head excavation, first need to adopt professional checkout equipment detect to the pipeline external anti-corrosion layer, as detect the pipeline external anti-corrosion layer and have wound to leak phenomenon, should in time carry out mending-leakage and process;
6). chemical loess slurries drifting: find the interior existence of the inclined shaft 1 disease phenomenon of stopping up and collapse etc. after upper well head 2, lower well head 3 excavations, in the time of can't unimpeded perfusion loess mud, adopt not higher than 33% low concentration chemistry loess slurries from upper well head 2 to the interior perfusion of inclined shaft 1, carry out the slurries drifting; Drifting is unsuccessful, carries out the slurries drifting after the loess by design excavation service shaft 4 or artificial removing obstruction again;
7). service shaft 4 or service incline excavation and supporting: service shaft 4 is arranged on disease inclined shaft middle part, transversely departs from disease inclined shaft 2m, adopts and is communicated with the tunnel connection, and service shaft 4 diameters are 1.5m, adopt manually digging hole, the steel reinforced concrete dado supporting; If service incline adopts the arched door pattern, wide 1.5m, high 1.75m, its middle and upper part is the semicircle of radius 0.75m, adopts the steel pipe frame supporting;
8). 3 shutoff of lower well head and the rammer of inclined shaft 1 are filled out: lower well head 3 adopts earth bag to pile up shutoff by the side at inclined shaft 1 hole, apart from the following employing of lower well head 3 ground 1m sixteen dirt compaction in layers backfills, its higher slice rams fills out the thick loess of 0.5m, earth's surface 0.5m adopts former ploughing to plant earthen backfill, lower well head 3 adopts earth bag to pile up shutoff by the side at inclined shaft 1 hole, be used for reducing the follow-up loess mud perfusion bottom pressure that retreads, mortar leakage prevention or rush end phenomenon;
9). loess mud is mixed system: carry out slurries according to the selected chemical loess slurries match ratio of the on-the-spot chemical loess grout coordinate ratio test of each inclined shaft and mix system;
10). subsectin bottler chemistry loess slurries: down pour into from upper well head 2 during grouting, because of excavation service shaft 4, adopt first by service shaft 4 grouting, then again from the packer grouting mode of well head 2 grouting on inclined shaft 1, filling process adopts intermittently grouting repeatedly;
11). on service shaft 4 and inclined shaft 1, well head 2 rams and fills out: service shaft 4 or inclined shaft 1 are filled out wait pouring into to ramming after the chemical loess slurries initial set in shaft bottom, when filling out, fills out apart from adopting plain loess layering to ram below wellhead ground 4m by rammer, on it, 3m adopts sixteen dirt layerings rammers to fill out, its higher slice rams and fills out the thick loess of 0.5m again, and earth's surface 0.5m adopts former ploughing to plant earthen backfill; Lay one deck waterproof geotextiles apart from wellhead ground 1m in addition;
12). land restoration: after upper well head 2, lower well head 3 and service shaft 4 well heads employings were ploughed and planted earthen backfill, table section adopted the 5% two-way slope of putting.
Step 10 wherein) to inclined shaft 1 subsectin bottler chemistry loess slurries, once grouting length is no more than 10m, and during greater than 25 °, once grouting length is no more than 5m when inclined shaft 1 gradient.
Step 10) subsectin bottler chemistry loess slurries are in the milk more than grouting intermittent time 36h more next time.
After during wherein pulping material is prepared, loess sieves, then carry out slurry configurations and stir.
Whole engineering is lasted 22 days, and engineering has been completed 1 year, and the engineering construction material is mainly taken from scene, after construction finishes, landforms have obtained recovery, environment is not contaminated, and the soil of upper well head 2, lower well head 3 can be cultivated normally and irrigate, and the safety of inclined shaft 1 engineering is not constituted a threat to.Engineering has been completed 1 year, hidden dangers in project do not occur.
Embodiment two
This engineering inclined shaft plagioclase 36m; 31 °, inclination angle; top layer 3m is that Malan loess, bottom are for native from orpiment; inclined shaft height 1.3m; width 1.1m, lay an oil pipeline and an optical cable in well, oil pipeline is φ 660 steel pipes; optical cable adopts φ 114 steel pipe outer sleeve protections, and oil pipeline and optical cable are exposed in well.
Training works carries out according to process sequence of the present invention: the interim rainproof and draining → upper well head of the chemical loess grout coordinate ratio test → inclined shaft periphery of pipeline location survey → on-the-spot, lower well head excavation → pipeline external anti-corrosion layer detects and mending-leakage → chemical loess slurries drifting → lower well head backfill and compacting → chemical loess slurries of chemical loess slurries preparation stirrings → inclined shaft subsectin bottler → upward backfill and compacting and the waterproof → land restoration of well head; Wherein shorter because of this inclined shaft length, drifting is smooth, does not excavate service incline.
Whole engineering is measured while starting to finish to share to land restoration 12 days from pipeline, the engineering construction material is mainly taken from scene, and after construction finishes, landforms have obtained recovery, and environment is not contaminated, the soil of the upper and lower well head of inclined shaft can be cultivated normally and irrigate, and the safety of inclined shaft engineering is not constituted a threat to.Engineering has been completed 1 year, hidden dangers in project do not occur.
Embodiment three
This engineering inclined shaft plagioclase 126m; 22 °, inclination angle; top layer 4m is that Malan loess, bottom are for native from orpiment; inclined shaft height 1.2m; width 1.0m, lay an oil pipeline and an optical cable in well, oil pipeline is φ 660 steel pipes; optical cable adopts φ 114 steel pipe outer sleeve protections, and oil pipeline and optical cable are exposed in well.
Training works carries out according to process sequence of the present invention: pipeline location survey → on-the-spot chemical loess grout coordinate ratio test → inclined shaft periphery is interim rainproof and draining → upward well head, lower well head, the detection of service incline excavation → pipeline external anti-corrosion layer and mending-leakage → chemical loess slurries drifting → service incline excavate → lower well head backfill and compacting → chemical loess slurries preparation stirring → inclined shaft subsectin bottler chemistry loess slurries → service incline and upper well head backfill and compacting and waterproof → land restoration.This engineering has been excavated service incline and has been carried out drifting and grouting at middle part.
Whole engineering is lasted 28 days, is completed and has experienced a rainy season, hidden dangers in project do not occur.
Claims (3)
1. a grouting construction process of pipeline inclined shaft engineering, is characterized in that, this construction technology comprises following steps:
1). pipeline location survey: first adopt pipe locator to carry out the pipeline location survey before construction, measure inclined shaft up and down well head particular location and the actual buried depth of pipeline;
2). on-the-spot chemical loess grout coordinate ratio test: carry out chemical loess grout coordinate ratio test at the inclined shaft scene, test should be in conjunction with the chemical loess slurries of local ground proterties, construction seasons, weather, interpolation chemical agent character, inclined shaft length, the multiple proportioning of gradient preparation, mobility, freezing period by measuring various chemical loess slurries, solidify rear intensity parameter, select to determine chemical loess slurries match ratio, be used for inclined shaft grouting;
3). the interim rainproof and draining of well week: interim rainproof measure and all temporary drains of well are set before the upper and lower well head excavation of inclined shaft, temporary drainage ditch depth 50cm, wide 50cm, charge for remittance around section row's well, be laid in the well head excavation line peripheral;
4). the upper and lower well head of inclined shaft excavation: the upper and lower well head of inclined shaft is excavated, with 0.5m * 0.5m stepped form excavation that faces down from ground, the suitable long 4m of duct orientation, the long 3m of vertical pipe direction, cutting depth lower than pipeline at the bottom of 0.5m;
5). the pipeline external anti-corrosion layer detects and mending-leakage: after the upper and lower well head excavation of inclined shaft, first need to adopt professional checkout equipment detect to the pipeline external anti-corrosion layer, as detect the pipeline external anti-corrosion layer and have wound to leak phenomenon, should in time carry out mending-leakage and process;
6). the drifting of chemical loess slurries: after the upper and lower well head excavation of inclined shaft, as interior in the discovery inclined shaft existence stopped up and the disease phenomenon that collapses, in the time of can't unimpeded perfusion loess mud, adopt not higher than 33% low concentration chemistry loess slurries and pour in inclined shaft from well head on inclined shaft, carry out the slurries drifting; As unsuccessful in the slurries drifting, carry out again the slurries drifting after by design excavating shaft or inclined shaft, manually removing the loess of obstruction;
7). service shaft or inclined shaft excavation and supporting: service shaft or inclined shaft are arranged on disease inclined shaft middle part, transversely depart from disease inclined shaft 2m, adopt and are communicated with the tunnel connection, and the service shaft diameter is 1.5m, adopts manually digging hole, the steel reinforced concrete dado supporting; Inclined shaft adopts the arched door pattern, wide 1.5m, and high 1.75m, its middle and upper part is the semicircle of radius 0.75m, adopts the steel pipe frame supporting;
8). under inclined shaft, well head shutoff and rammer are filled out: under inclined shaft, well head adopts earth bag to pile up shutoff by the side at inclined shaft hole, adopt sixteen dirt compaction in layers backfills below wellhead ground 1m under inclined shaft, its higher slice rams fills out the thick loess of 0.5m, earth's surface 0.5m adopts former ploughing to plant earthen backfill, under inclined shaft, well head adopts earth bag to pile up shutoff by the side at inclined shaft hole, be used for reducing the follow-up loess mud perfusion bottom pressure that retreads, mortar leakage prevention or rush end phenomenon;
9). loess mud is mixed system: carry out slurries according to the selected chemical loess slurries match ratio of the on-the-spot chemical loess grout coordinate ratio test of each inclined shaft and mix system;
10). subsectin bottler chemistry loess slurries: down pour into from well head on inclined shaft during grouting, as excavate service shaft or inclined shaft, adopt first by service shaft or inclined shaft grouting, then again from the packer grouting mode of well head grouting on inclined shaft, filling process adopts intermittently grouting repeatedly;
11). on service shaft or inclined shaft and inclined shaft, well head rams and to fill out: service shaft or inclined shaft are filled out wait pouring into to ramming after the chemical loess slurries initial set at the bottom of vertical shaft or inclined shaft, when filling out, fills out apart from adopting plain loess layering to ram below wellhead ground 4m by rammer, on it, 3m adopts sixteen dirt layerings rammers to fill out, its higher slice rams and fills out the thick loess of 0.5m again, and earth's surface 0.5m adopts former ploughing to plant earthen backfill; Lay one deck waterproof geotextiles apart from wellhead ground 1m in addition;
12). land restoration: after the upper and lower well head of inclined shaft and service shaft well head were ploughed and planted earthen backfill, table section adopted the 5% two-way slope of putting.
2. described grouting construction process of pipeline inclined shaft engineering according to claim 1, it is characterized in that described step 10) to inclined shaft subsectin bottler chemistry loess slurries, once grouting length is no more than 10m, during greater than 25 °, once grouting length is no more than 5m when the inclined shaft gradient.
3. described grouting construction process of pipeline inclined shaft engineering according to claim 1, is characterized in that described step 10) subsectin bottler chemistry loess slurries are in the milk more than grouting intermittent time 36h more next time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011103901186A CN102493810B (en) | 2011-11-30 | 2011-11-30 | Grouting construction process of pipeline inclined shaft engineering |
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| CN2011103901186A CN102493810B (en) | 2011-11-30 | 2011-11-30 | Grouting construction process of pipeline inclined shaft engineering |
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| CN102493810B true CN102493810B (en) | 2013-11-13 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107237649A (en) * | 2017-07-26 | 2017-10-10 | 中国水电基础局有限公司 | The long steep inclined shaft transportation system of light section and construction method |
| CN109441441B (en) * | 2018-11-15 | 2022-02-22 | 华北科技学院 | Simulation test device and method for coal seam bottom plate multi-angle inclined drilling grouting process under pressure-bearing flowing water action |
| CN110420960A (en) * | 2019-05-14 | 2019-11-08 | 广州环投环境服务有限公司 | A kind of junk-heap body slope trimming method |
| CN117967364B (en) * | 2024-04-02 | 2024-05-31 | 煤炭工业太原设计研究院集团有限公司 | Sylvite high-stress mudstone section roadway support structure and method |
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| CN1063528A (en) * | 1991-01-25 | 1992-08-12 | 李鹏程 | A kind of vertical shaft or inclined shaft concrete and grouting combined construction method and equipment |
| CN1710312A (en) * | 2005-06-23 | 2005-12-21 | 西安理工大学 | A Design Method for Pressure Buried Pipes of SCS Combined Hydropower Station |
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| CN101705717A (en) * | 2009-11-05 | 2010-05-12 | 中铁一局集团有限公司 | Internal liner of drainage pipe or dirt discharge pipe for operation with water and construction method thereof for operation with water |
| CN101845953A (en) * | 2010-05-20 | 2010-09-29 | 中国水利水电第五工程局有限公司 | Inclined shaft excavation construction process for oversize water gushing earth cave |
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2011
- 2011-11-30 CN CN2011103901186A patent/CN102493810B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB890329A (en) * | 1957-03-06 | 1962-02-28 | Bergwerksverband Gmbh | Method of, and means for, mining seam-like mineral deposits |
| CN1063528A (en) * | 1991-01-25 | 1992-08-12 | 李鹏程 | A kind of vertical shaft or inclined shaft concrete and grouting combined construction method and equipment |
| CN1710312A (en) * | 2005-06-23 | 2005-12-21 | 西安理工大学 | A Design Method for Pressure Buried Pipes of SCS Combined Hydropower Station |
| CN101255698A (en) * | 2008-01-23 | 2008-09-03 | 湖南省建筑工程集团总公司 | Drifting sand layer and gravel stratum water-moving double-liquid high pressure slip-casting water-blocking construction method |
| CN101705717A (en) * | 2009-11-05 | 2010-05-12 | 中铁一局集团有限公司 | Internal liner of drainage pipe or dirt discharge pipe for operation with water and construction method thereof for operation with water |
| CN101845953A (en) * | 2010-05-20 | 2010-09-29 | 中国水利水电第五工程局有限公司 | Inclined shaft excavation construction process for oversize water gushing earth cave |
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Address after: 610072 No. 119 Xiqing Road, Chengdu City, Sichuan Province Patentee after: Sichuan Geological Engineering Exploration Institute Group Co.,Ltd. Address before: 610072 No. 119 Xiqing Road, Chengdu City, Sichuan Province Patentee before: Sichuan Institute of Geological Engineering Investigation |
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Granted publication date: 20131113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |