CN105256848A - Coordinating and controllable soil digging and slant rectifying method in roadway - Google Patents
Coordinating and controllable soil digging and slant rectifying method in roadway Download PDFInfo
- Publication number
- CN105256848A CN105256848A CN201510582430.3A CN201510582430A CN105256848A CN 105256848 A CN105256848 A CN 105256848A CN 201510582430 A CN201510582430 A CN 201510582430A CN 105256848 A CN105256848 A CN 105256848A
- Authority
- CN
- China
- Prior art keywords
- anchor cable
- soil digging
- building
- digging
- soil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002689 soil Substances 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004062 sedimentation Methods 0.000 claims abstract description 19
- 238000010276 construction Methods 0.000 claims abstract description 5
- 238000012937 correction Methods 0.000 claims description 16
- 238000013461 design Methods 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000011083 cement mortar Substances 0.000 claims description 3
- 230000009191 jumping Effects 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 claims description 2
- 239000010865 sewage Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a coordinating and controllable soil digging and slant rectifying method in a roadway. The method comprises the following steps that (1) vertical shafts are dug in the sides where sedimentation amount is low in a bypassed mode; (2) anchor cable fixation construction is conducted; (3) a stress applying system and a stress measuring system are installed on an anchor cable; (4) the multiple vertical shafts are selected for digging a horizontal roadway; (5) horizontal soil digging operation is conducted in the vertical shafts where the horizontal roadway is not dug yet, and soil digging holes are distributed in a radial model; (6) horizontal soil digging is conducted in the horizontal roadway, and soil digging holes are distributed horizontally; (7) the anchor cable is subjected to graded loading and tensioning through a hydraulic jack, and in this way, slant rectifying is conducted on a building or a structure; (8) before slant rectifying reaches the standard, stress continues to be applied to the anchor cable, or soil digging operation continues to be conducted in the horizontal roadway; and (9) after slant rectifying is finished, the soil digging holes in the vertical shafts, the soil digging holes in the horizontal roadway and the vertical shafts are backfilled. According to the coordinating and controllable soil digging and slant rectifying method in the roadway, the soil digging amount is high, the success rate is high, the soil digging holes are short, an elevator shaft or a sewage disposal pit can not be encountered, and differential settlement is avoided.
Description
Technical field
The present invention relates to building rectification technical field, particularly a kind ofly coordinate soil digging inclination correction method in controlled tunnel.
Background technology
Due to prospecting error, design the reasons such as improper, construction quality is inferior, working service and natural calamity and often make building uneven subsidence, the defect phenomenon such as run-off the straight, warpage, cracking, sinking.In addition, underground space development, deep pit digging also often make to close on ground building uneven subsidence, cause the disease of the phenomenons such as ground building cracking, inclination, these diseases the lighter affects the normal use of building, it is made to lose using function time serious, even collapse, causes heavy economic losses and casualties.
The building rectification righting of China is started late with the anti-reinforcing technique that inclines again, but development is very fast during the last ten years recently, emerges the new technology of many rectification and reinforcement of buildings, new method and new technology.Large quantities of dangerous building are saved, for country avoids serious economic loss.
At present, building inclination correction method has more than 30 and plants, and Shallow Digging method is wherein a kind of, is under the inner side, basis or outside substrate of inclination building, adopts artificial or mechanical horizontal digging, substrate support area is reduced.Under the effect of upper load gravity pressure, produce new differential settlement, to reach rectification object.But this inclination correction method still has a lot of limitation.On the one hand, the planar dimension of vertical shaft is limited, be only the working space that substrate soil digging is provided, so the quantity of machine drilling is also limited in vertical shaft, cause soil digging amount limited, present building are all that main building and annex connect together mostly, soil digging amount does not reach the effect of rectification less, carrying out " point well, in batches, every hole, jack " after soil digging, if there is not slight dip amount in basis, the position that rig soil digging has not been holed, whole rectification process just have failed, waste a large amount of manpowers, material resources and time, finally also to spend manpower again, material resources backfill boring and vertical shaft, collapse to prevent building and cause a serious accident.On the other hand, use the method rectification, new sedimentation is produced in order to make building, reach new balance, boring just needs certain length to reach the requirement of soil digging amount, hole and be longly easy to encounter elevator shaft or sewerage treatment hole, and the long drill bit that also can make of holing hole certain sag of chain in the soil body, is difficult to all horizontal digging holes of guarantee in a horizontal plane.Horizontal digging hole is not in a plane, and basis just can not evenly sink, and new uneven subsidence appears in easily generation " prominent heavy " phenomenon or basis, and the differential settlement produced can cause the crack that building are new.
Summary of the invention
The present invention proposes and a kind ofly coordinate horizontal digging inclination correction method in controlled shallow-layer tunnel, the rectification mode soil digging amount solving prior art is limited, success rate is uncontrollable, holes longly easily to encounter the underground parts such as elevator shaft, and easy uneven sedimentation and prominent heavy defect.
Technical scheme of the present invention is achieved in that
Coordinate a soil digging inclination correction method in controlled tunnel, it is characterized in that, comprise the following steps:
(1), at the other excavating shaft of inclined building or the few side of structure sedimentation, shaft depths is lower 1.7m ~ 2.0m to basis, and being formed can for the working space of substrate soil digging;
(2), according to the heeling moment of building or structure, basis and foundation soil strength, the quantity and the single anchor cable that calculate laying anchor cable are stressed, according to design aperture and the length of anchor cable, the basis of the few side of building or structure sedimentation carries out anchor cable construction, and anchor cable must go deep in ground good ground through basis;
(3), after in anchor cable hole, cement mortar reaches design strength, anchor cable outer anchor head place erection stress sensor, hydraulic jack and locking device on building or structure base, form afterburner system by anchor cable, hydraulic jack and coupled electric oil pump, form dynamometric system by the oil pressure gauge that strain gauge and electric oil pump are arranged;
(4), according to the building of inclination or the feature of the unidirectional inclination of structure or inclined in two-way, select some shaft excavation entrys targetedly, being formed can for the space of horizontal digging operation;
(5), in the vertical shaft not excavating entry, horizontal digging operation is carried out, in vertical shaft, horizontal digging answers " every well, in batches, jumping hole " to carry out, and strengthen settlement observation and the declivity observation of building or the structure tilted, soil digging hole is radial arrangement, and the length in soil digging hole is to ensure that drill bit larger sag of chain does not occur and is advisable;
(6), after in vertical shaft, horizontal digging operation all completes, start to carry out horizontal digging outward by inner in entry, and strengthen settlement observation and the declivity observation of building or the structure tilted, when there is slight dip amount on basis, soil digging operation should be stopped immediately, enter anchor cable applying step;
(7), according to the feedback of horizontal digging amount and dynamometric system metrical information in entry, by hydraulic jack, loaded and tensioned stage by stage is carried out to anchor cable, record the reading of oil pressure gauge and strain gauge simultaneously, check and correction applies pressure size, the inclination of real-time monitoring building or structure and sedimentation situation, timely feedback information;
(8), according to feedack, when building or structure return incline reach predetermined rectification target time, should anchor cable be stopped immediately pressurizeing; When building or structure return the amount of inclining do not reach predetermined rectification target time, and anchor cable now also do not reach design apply pressure time, can have two kinds of modes, one is continue to apply pressure to anchor cable, monitors inclination and the sedimentation situation of inclined building or structure in real time; Two is again carry out horizontal digging in entry, if there is sedimentation to have obvious change, anchor cable force must lose, and can continue to carry out ftercompction to anchor cable;
(9), after the predeterminated target that reaches rectification, to anchor cable locking, anti-object of inclining again is reached, and to the soil digging hole in vertical shaft, the soil digging hole in entry and vertical shaft with backfilling.
Further, the diameter of described entry is 1.2m ~ 1.6m, is convenient to personnel and enters boring soil digging.
Further, the aperture in the soil digging hole in described vertical shaft and the soil digging hole in entry is 0.09m ~ 0.3m.
Further, the inwall of described vertical shaft is provided with concrete guard wall, in described vertical shaft, is also provided with upper and lower staircase and lighting device.
Beneficial effect of the present invention:
Soil digging method in the employing entry of the invention, the level changed in the past bores the method for soil digging, excavate entry, entry can allow people enter boring soil digging, inwall along entry can bore a large amount of horizontal digging holes, considerably increase the quantity in soil digging hole, soil digging amount is large, thus can ensure the success of building or inclined building correcting; Because the quantity in soil digging hole is many, soil digging amount is secure, so the length in soil digging hole can be shortened, prevent soil digging hole long easily encounter elevator shaft or sewerage treatment hole, the long drill bit that also can make in soil digging hole is sagging in boring procedure in addition, make soil digging hole not in a plane, soil digging hole is not in a plane, basis just can not evenly sink, there is new uneven subsidence in easy generation " prominent heavy " phenomenon or basis, the differential settlement produced can cause the crack that building are new.In addition in conjunction with anchor cable force method, according to the feedback of horizontal digging amount and dynamometric system metrical information in entry, by hydraulic jack, loaded and tensioned stage by stage is carried out to anchor cable, record the reading of oil pressure gauge and strain gauge simultaneously, check and correction applies pressure size, the inclination of real-time monitoring building or structure and sedimentation situation, thus reach accurate, controlled rectification effect.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of principle schematic coordinating soil digging inclination correction method in controlled tunnel of the present invention;
Fig. 2 is the sectional view of A-A line in Fig. 1.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
With reference to Fig. 1-2, a kind ofly coordinate soil digging inclination correction method in controlled tunnel, it is characterized in that, comprise the following steps:
(1), at the other excavating shaft 2 of inclined building or the few side 11 of structure 1 sedimentation, vertical shaft 2 degree of depth is to the 3 times 1.7m ~ 2.0m in basis, and being formed can for the working space of substrate soil digging;
(2), according to the heeling moment of building or structure 1, basis 3 and foundation soil strength, the quantity and the single anchor cable 4 that calculate laying anchor cable 4 are stressed, according to design aperture and the length of anchor cable 4, anchor cable 4 is carried out on the basis of the few side 11 of building or structure 1 sedimentation construct, anchor cable 4 must go deep in ground good ground through basis 3;
(3), after in anchor cable hole, cement mortar reaches design strength, anchor cable 4 outer anchor head place erection stress sensor 5, hydraulic jack 6 and locking device on building or structure 1 basis 3, form afterburner system by anchor cable 4, hydraulic jack 6 and coupled electric oil pump, form dynamometric system by the oil pressure gauge that strain gauge 5 and electric oil pump are arranged;
(4), according to the building of inclination or the feature of the unidirectional inclination of structure 1 or inclined in two-way, select some vertical shafts 1 to excavate entry 7 targetedly, being formed can for the space of horizontal digging operation;
(5), in the vertical shaft 2 not excavating entry 7, horizontal digging operation is carried out, in vertical shaft 2, horizontal digging answers " every well, in batches, jumping hole " to carry out, and strengthen settlement observation and the declivity observation of building or the structure 1 tilted, in vertical shaft, soil digging hole 21 is radial arrangement, and the length in soil digging hole 21 is to ensure that drill bit larger sag of chain does not occur and is advisable;
(6), after in vertical shaft 2, horizontal digging operation all completes, start to carry out horizontal digging outward by inner in entry 7, and strengthen settlement observation and the declivity observation of building or the structure 1 tilted, when there is slight dip amount on basis 3, soil digging operation should be stopped immediately, enter anchor cable 4 applying step;
(7), according to the feedback of horizontal digging amount and dynamometric system metrical information in entry 7, loaded and tensioned stage by stage is carried out by hydraulic jack 6 pairs of anchor cables 4, record the reading of oil pressure gauge and strain gauge 5 simultaneously, check and correction applies pressure size, the inclination of real-time monitoring building or structure 1 and sedimentation situation, timely feedback information;
(8), according to feedack, when building or structure incline for 1 time reach predetermined rectification target time, anchor cable 4 should be stopped immediately pressurizeing; When building or structure 1 time amount of inclining do not reach predetermined rectification target, and anchor cable 4 now also do not reach design apply pressure time, can have two kinds of modes, one is continue to apply pressure to anchor cable 4, monitors inclination and the sedimentation situation of inclined building or structure 1 in real time; Two is again carry out horizontal digging in entry 7, if there is sedimentation to have obvious change, anchor cable 4 Suo Libi loses, and can continue to carry out ftercompction to anchor cable 4;
(9), after the predeterminated target that reaches rectification, anchor cable 4 is locked, reaches anti-object of inclining again, and to soil digging hole 71 and vertical shaft 2 in the soil digging hole 21 in vertical shaft, entry with backfilling.
Preferably, the diameter of described entry 7 is 1.2m ~ 1.6m, is convenient to personnel and enters boring soil digging.
Preferably, the aperture in the soil digging hole 21 in described vertical shaft 2 and the soil digging hole 71 in entry 7 is 0.09m ~ 0.3m.
Preferably, the inwall of described vertical shaft 2 is provided with concrete guard wall, in described vertical shaft 2, is also provided with upper and lower staircase and lighting device.The arranging of upper and lower staircase facilitates that constructor's is upper and lower, lighting device convenient construction is set.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. coordinate a soil digging inclination correction method in controlled tunnel, it is characterized in that, comprise the following steps:
(1), at the other excavating shaft of inclined building or the few side of structure sedimentation, shaft depths is lower 1.7m ~ 2.0m to basis, and being formed can for the working space of substrate soil digging;
(2), according to the heeling moment of building or structure, basis and foundation soil strength, the quantity and the single anchor cable that calculate laying anchor cable are stressed, according to design aperture and the length of anchor cable, the basis of the few side of building or structure sedimentation carries out anchor cable construction, and anchor cable must go deep in ground good ground through basis;
(3), after in anchor cable hole, cement mortar reaches design strength, anchor cable outer anchor head place erection stress sensor, hydraulic jack and locking device on building or structure base, form afterburner system by anchor cable, hydraulic jack and coupled electric oil pump, form dynamometric system by the oil pressure gauge that strain gauge and electric oil pump are arranged;
(4), according to the building of inclination or the feature of the unidirectional inclination of structure or inclined in two-way, select some shaft excavation entrys targetedly, being formed can for the space of horizontal digging operation;
(5), in the vertical shaft not excavating entry, horizontal digging operation is carried out, in vertical shaft, horizontal digging answers " every well, in batches, jumping hole " to carry out, and strengthen settlement observation and the declivity observation of building or the structure tilted, soil digging hole is radial arrangement, and the length in soil digging hole is to ensure that drill bit larger sag of chain does not occur and is advisable;
(6), after in vertical shaft, horizontal digging operation all completes, start to carry out horizontal digging outward by inner in entry, and strengthen settlement observation and the declivity observation of building or the structure tilted, when there is slight dip amount on basis, soil digging operation should be stopped immediately, enter anchor cable applying step;
(7), according to the feedback of horizontal digging amount and dynamometric system metrical information in entry, by hydraulic jack, loaded and tensioned stage by stage is carried out to anchor cable, record the reading of oil pressure gauge and strain gauge simultaneously, check and correction applies pressure size, the inclination of real-time monitoring building or structure and sedimentation situation, timely feedback information;
(8), according to feedack, when building or structure return incline reach predetermined rectification target time, should anchor cable be stopped immediately pressurizeing; When building or structure return the amount of inclining do not reach predetermined rectification target time, and anchor cable now also do not reach design apply pressure time, can have two kinds of modes, one is continue to apply pressure to anchor cable, monitors inclination and the sedimentation situation of inclined building or structure in real time; Two is again carry out horizontal digging in entry, if there is sedimentation to have obvious change, anchor cable force must lose, and can continue to carry out ftercompction to anchor cable;
(9), after the predeterminated target that reaches rectification, to anchor cable locking, reach anti-object of inclining again, and the soil digging hole in vertical shaft, the soil digging hole in entry and vertical shaft are backfilled.
2. soil digging inclination correction method in the tunnel that coordination as claimed in claim 1 is controlled, is characterized in that: the diameter of described entry is 1.2m ~ 1.6m, is convenient to personnel and enters boring soil digging.
3. soil digging inclination correction method in the tunnel that coordination as claimed in claim 1 is controlled, is characterized in that: the aperture in the soil digging hole in described vertical shaft and the soil digging hole in entry is 0.09m ~ 0.3m.
4. soil digging inclination correction method in the tunnel that coordination as claimed in claim 1 is controlled, is characterized in that: the inwall of described vertical shaft is provided with concrete guard wall, is also provided with upper and lower staircase and lighting device in described vertical shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510582430.3A CN105256848B (en) | 2015-09-11 | 2015-09-11 | Coordinating and controllable soil digging and slant rectifying method in roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510582430.3A CN105256848B (en) | 2015-09-11 | 2015-09-11 | Coordinating and controllable soil digging and slant rectifying method in roadway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105256848A true CN105256848A (en) | 2016-01-20 |
| CN105256848B CN105256848B (en) | 2017-05-10 |
Family
ID=55096752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510582430.3A Expired - Fee Related CN105256848B (en) | 2015-09-11 | 2015-09-11 | Coordinating and controllable soil digging and slant rectifying method in roadway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105256848B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108867724A (en) * | 2018-09-20 | 2018-11-23 | 中铁西北科学研究院有限公司 | A kind of inclination correction method based on well shape tunnel boring extracting soil |
| CN114809133A (en) * | 2022-04-13 | 2022-07-29 | 南京工业大学 | Device and method for repairing inclined deflection of retaining wall by using decompression principle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10235950A1 (en) * | 2002-08-06 | 2004-02-19 | Gudehus, Gerd, Prof. Dr.-Ing. | Ground movement compensation method for protection of structures, uses computer-optimized arrangement and sequence to force in ground material using screws in mainly horizontal bores starting from shafts |
| CN101787717A (en) * | 2010-03-13 | 2010-07-28 | 中铁西北科学研究院有限公司 | Controllable accurate combined inclination correction method |
| CN101864779A (en) * | 2010-06-29 | 2010-10-20 | 天津建岩岩土工程有限公司 | Building deep soil excavating rectification method |
-
2015
- 2015-09-11 CN CN201510582430.3A patent/CN105256848B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10235950A1 (en) * | 2002-08-06 | 2004-02-19 | Gudehus, Gerd, Prof. Dr.-Ing. | Ground movement compensation method for protection of structures, uses computer-optimized arrangement and sequence to force in ground material using screws in mainly horizontal bores starting from shafts |
| CN101787717A (en) * | 2010-03-13 | 2010-07-28 | 中铁西北科学研究院有限公司 | Controllable accurate combined inclination correction method |
| CN101864779A (en) * | 2010-06-29 | 2010-10-20 | 天津建岩岩土工程有限公司 | Building deep soil excavating rectification method |
Non-Patent Citations (1)
| Title |
|---|
| 李清泉等: "锚杆静压桩在纠倾加固工程中加固效果分析", 《甘肃科技》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108867724A (en) * | 2018-09-20 | 2018-11-23 | 中铁西北科学研究院有限公司 | A kind of inclination correction method based on well shape tunnel boring extracting soil |
| CN114809133A (en) * | 2022-04-13 | 2022-07-29 | 南京工业大学 | Device and method for repairing inclined deflection of retaining wall by using decompression principle |
| CN114809133B (en) * | 2022-04-13 | 2023-10-27 | 南京工业大学 | Device and method for repairing inclination deflection of retaining wall by using decompression principle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105256848B (en) | 2017-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105840207B (en) | Construction method for comprehensive tunnel entering structure of large-span tunnel penetrating shallow-buried bias-pressure loose accumulation body | |
| CN110374633B (en) | Tunnel opening section construction method for tunnel to pass through loose body | |
| CN102943466B (en) | Construction method for miniature steel pipe concrete pile to penetrate through roadbed layer for reinforcing soft foundation construction | |
| CN103758123B (en) | The construction method of manually digging hole filling pile retaining wall lining | |
| CN108086340A (en) | Open caisson construction structure and construction method thereof | |
| CN105155602B (en) | A kind of many fulcrums foundation stabilization synthesis inclination correction method | |
| CN106812150A (en) | A kind of mountain area steep slope region Road Bridge Pile Foundation construction method | |
| CN105064328A (en) | Construction device and method for pile foundation | |
| CN103321260A (en) | Rectifying method by drilling at intervals and pile cutting off | |
| CN106812153A (en) | Beam and slab type construction elevator foundation construction engineering method in a kind of backfill | |
| CN106988305A (en) | A kind of pile-column pier construction method of underground integrated molding | |
| CN106245655A (en) | Utilize the deep foundation pit supporting construction method of miniature steel pipe pile | |
| Zhou et al. | Foundation reinforcement and deviation rectification of the leaning pagoda of Dinglin Temple, China | |
| CN106638675A (en) | Reverse structural steel and bamboo splint soil retaining construction method | |
| CN105256848A (en) | Coordinating and controllable soil digging and slant rectifying method in roadway | |
| CN205576957U (en) | Stake end pilework | |
| CN103806444A (en) | Soft soil layer rotary excavating pile construction method | |
| CN117211277A (en) | Construction method of reinforced concrete bored concrete pile of soft soil foundation | |
| CN111425664A (en) | Large-diameter concrete pipeline jacking pipe construction method | |
| CN110630273A (en) | Construction method of totally weathered granite ground layer bias shallow tunnel | |
| CN115717397A (en) | Larsen steel sheet pile and prestressed anchor cable combined supporting construction method | |
| CN111379273A (en) | Construction method of corrugated steel comprehensive pipe gallery | |
| CN204875761U (en) | Pile foundation construction equipment | |
| CN111997628B (en) | Tunnel construction method | |
| CN106049516A (en) | Corrugated steel cofferdam hollow digging pile and manufacturing technique thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170510 |