CN204491626U - The foundation pit enclosure structure that Larsen steel sheet pile and prestressed anchor combine - Google Patents
The foundation pit enclosure structure that Larsen steel sheet pile and prestressed anchor combine Download PDFInfo
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- CN204491626U CN204491626U CN201520083415.XU CN201520083415U CN204491626U CN 204491626 U CN204491626 U CN 204491626U CN 201520083415 U CN201520083415 U CN 201520083415U CN 204491626 U CN204491626 U CN 204491626U
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The utility model relates to the foundation pit enclosure structure that a kind of Larsen steel sheet pile and prestressed anchor combine, mainly comprise Larsen steel sheet pile and prestressed anchor, the limit, top four of foundation ditch is provided with guide-localization bracket, some Larsen steel sheet piles are provided with in groove, Larsen steel sheet pile is provided with prestressed anchor, be provided with basement bottom board and load transfering strip bottom foundation ditch, basement bottom board is fixedly connected with Larsen steel sheet pile by load transfering strip, retains certain interval between guide-localization bracket and Larsen steel sheet pile.The effect that the utility model is useful is: Larsen steel sheet pile structure of the present utility model, and high strength, light-duty, water isolating good; Overall structure durability is strong; Reusable; Environment protecting is remarkable, can greatly reduce the amount of fetching earth and concrete use amount, available protecting land resources in construction; There is the function of stronger disaster relief and rescue, especially controlling flood, cave in, subside, in the rescue and relief work of drift sand, take effect fast especially; Construction is simple, and the duration shortens, and construction cost is comparatively economized.
Description
Technical field
The utility model relates to a kind of foundation pit enclosure structure, the foundation pit enclosure structure that especially a kind of Larsen steel sheet pile and prestressed anchor combine.
Background technology
Base pit engineering has the advantages that engineering quantity is large, technical difficulty is high, unpredictable element is many, and the security reliability of pattern foundation pit supporting structure not only affects base pit engineering itself, and often affects the surrounding enviroment of foundation ditch.Just because of this, foundation pit support plan must be selected in conjunction with local environmental conditions; On the other hand, although pattern foundation pit supporting structure is temporary structure, it costly can not be ignored the impact of project total cost.Therefore, how to select can the pattern foundation pit supporting structure form of protection of the environment economical rationality again, is of great practical significance.
Foundation ditch area is large, the individual layer Underground Construction of out-of-shape, surrounding enviroment complexity, and pattern foundation pit supporting structure possibility is more.Supporting and protection structure comprises bored pile supporting, composite soil nailing, the supporting of SMW engineering method, cement mixing pile gravity retaining wall, steel sheet pile supporting etc.; Supporting form has concrete horizontal support, steel pipe diagonal brace and prestressed anchor etc.The preferred impact on safety of surrounding environment, construction technology and economic input of foundation pit support plan is all very huge.
Summary of the invention
The utility model will solve the shortcoming of above-mentioned prior art, there is provided that a kind of intensity is high, stress performance is excellent, stagnant water effect is good, easy and simple to handle and energy-conserving and environment-protective, the foundation pit enclosure structure that the Larsen steel sheet pile of various soil layer and multiple underground construction and prestressed anchor combine can be adapted to.
The utility model solves the technical scheme that its technical problem adopts: the foundation pit enclosure structure that this Larsen steel sheet pile and prestressed anchor combine, mainly comprise Larsen steel sheet pile and prestressed anchor, the limit, top four of foundation ditch is provided with guide-localization bracket, some Larsen steel sheet piles are provided with in groove, groove has been dug in the periphery at foundation ditch top, Larsen steel sheet pile is provided with prestressed anchor, basement bottom board and load transfering strip is provided with bottom foundation ditch, basement bottom board is fixedly connected with Larsen steel sheet pile by load transfering strip, certain interval is retained between described guide-localization bracket and Larsen steel sheet pile.
Described guide-localization bracket is made up of guide pile and nose girder, and guide pile is the steel pipe pile of diameter 50cm, and nose girder adopts No. 40 i iron to process.
Described prestressed anchor encloses purlin drawknot locking Larsen steel sheet pile by steel.
The effect that the utility model is useful is: Larsen steel sheet pile structure of the present utility model, one is steel pile, and two is both sides fastening joint structures, and three is form wall in the ground or in water, due to its special construction, thus there is unique advantage: high strength, light-duty, water isolating good; Overall structure durability is strong, and application life reaches 20-50; Reusable, generally can use 3-5 time; Environment protecting is remarkable, can greatly reduce the amount of fetching earth and concrete use amount, available protecting land resources in construction; There is the function of stronger disaster relief and rescue, especially controlling flood, cave in, subside, in the rescue and relief work of drift sand, take effect fast especially; Construction is simple, and the duration shortens, and construction cost is comparatively economized.
Accompanying drawing explanation
Fig. 1 is floor map 1 of the present utility model;
Fig. 2 is floor map 2 of the present utility model;
Fig. 3 is generalized section of the present utility model;
Fig. 4 is Larsen steel sheet pile arrangement form schematic diagram.
Description of reference numerals: Larsen steel sheet pile 1, groove 2, guide-localization bracket 3, prestressed anchor 4, steel encloses purlin 5, basement bottom board 6, load transfering strip 7, foundation ditch 8.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in the figure, the foundation pit enclosure structure that this Larsen steel sheet pile and prestressed anchor combine, mainly comprise Larsen steel sheet pile 1 and prestressed anchor 4, the limit, top four of foundation ditch 8 is provided with guide-localization bracket 3, guide-localization bracket 3 is made up of guide pile and nose girder, guide pile is the steel pipe pile of diameter 50cm, is 5 ~ 7m according to different soil property depth of drive, and nose girder adopts No. 40 i iron to process.Be provided with some Larsen steel sheet piles 1 in groove 2, groove 2 has been dug in the periphery at foundation ditch 8 top, and Larsen steel sheet pile 1 is provided with prestressed anchor 4, and described prestressed anchor 4 encloses purlin 5 drawknot locking Larsen steel sheet pile 1 by steel.Basement bottom board 6 and load transfering strip 7 is provided with bottom foundation ditch 8, basement bottom board 6 is fixedly connected with Larsen steel sheet pile 1 by load transfering strip 7, retain certain interval between described guide-localization bracket 3 and Larsen steel sheet pile 1, to make between guide-localization bracket 3 and Larsen steel sheet pile 1 not contact-impact.
The construction of total is primarily of the line setting of steel sheet pile position, and digging groove, installs guide-localization bracket, injection steel sheet pile, cuts the earth, the steps such as reinforced anchor bolt is constructed, and steel sheet pile is pulled out, and stake holes backfills, engineering monitoring composition.
The Larsen steel sheet pile 1 of the models such as SP-II, SP-III, SP-IV, SP-VL is selected according to stressing conditions, length is 9m ~ 12m, screen method (in a row inserted in saddle by 10-20 root steel sheet pile, make it be screen shape, and then injection) piling is adopted by hydraulic vibration pile sinking machine.It is concavo-convex that this construction method not easily makes Larsen steel sheet pile 1 that flexing, torsion, inclination and metope occur, and squeezes into precision high, is easy to realize closing close up.
Prestressed anchor adopts HRB400 level Φ 22 or Φ 25 reinforcing bar, and length is 15m ~ 22m, arranges vertical interval 2.5m, level interval 2m ~ 2.5m up and down, 15 °, inclination angle; Bolt grouting adopts M30 class g cement mortar, and slip casting pressure is 0.2 ~ 0.3MPa.
Pulling out of Larsen steel sheet pile adopts excavator vibration hammer to carry out vibration pile pulling.Vibration pile pulling utilizes vibrating hammer to apply vibration force to Larsen steel sheet pile, disturbed soil, destroys frictional resistance between itself and Larsen steel sheet pile and absorption affinity and apply to hang lift and extracted by Larsen steel sheet pile.
Excavation slope top is arranged baseline (one, every foundation ditch limit), every bar baseline is established 1 ~ 3 deformation observation point, simultaneously again as settlement observation point.Four sides enclosure wall periphery respectively arranges four settlement observation points, forms the settlement observation net of monitoring surrounding enviroment together with foundation ditch periphery shallow foundation building, important pipeline monitoring point.
Specific construction step is as follows:
(1) line setting of Larsen steel sheet pile position
Adopt transit to make injection steel sheet pile axis according to by the design outside mobile 10cm in steel sheet pile position, and mark sheet pile center line and soil excavation boundary with pulverized limestone.
(2) digging groove
First the foreign material in construction infection region and load are removed clean before piling.Dig under putting slope to design steel sheet pile top, injection C15 pea gravel concreten is carried out out for the exposed soil body putting slope, and carries out the waterproof and drain measure on foundation ditch top.
(3) guide-localization bracket is installed
In steel sheet pile construction, for ensureing the vertical of the correct of pile sinking axial location and stake, what control stake squeezes into precision, prevents the bending deformation of sheet pile and the penetration capability of raising stake, generally all needs that arrange certain rigidity, firm saddle, also known as " nose girder ".
First injection guide pile, adopting the steel pipe pile of diameter 50cm (wall thickness 10mm), is 5 ~ 7m according to different soil property depth of drive.Nose girder adopts No. 40 i iron to process.
Install nose girder time should note following some:
Adopt the position of transit and level gauge controlling and adjustment nose girder.
Lead depth of beam will be suitable for, the construction height and the raising construction efficiency that control steel sheet pile be conducive to.
Nose girder can not produce along with setting of steel sheet pile and distortion.
Should try one's best vertically in the position of nose girder, can not collide with steel sheet pile.
(4) injection Larsen steel sheet pile
Larsen steel sheet pile construction is related to construction sealing and safety, is one of operation of this engineering construction most critical, will notes following relevant requirements of constructing in construction:
1) situation of underground utilities, structure must be familiar with before injection, conscientiously release soldier pile center line accurately.
2) before piling, to Larsen steel sheet pile by root inspection, reject and connect fore shaft corrosion, be out of shape serious steel sheet pile, failure is to be trimmed just can be used afterwards.
3), before piling, grease in the fore shaft of Larsen steel sheet pile, extracts to facilitate to squeeze into.
4) gradient measuring the every block stake of monitoring in inserted to play process is at any time no more than 2%, with when pulling together method levelling, can not pull up and beat again when deflection is excessive.
5) injection of Larsen steel sheet pile adopts screen-type to squeeze into method construction.Screen-type squeezes into method not easily makes sheet pile generation flexing, torsion, inclination and metope concavo-convex, squeezes into precision high, is easy to realize closing close up.During construction, 10-20 root steel sheet pile is in a row inserted in saddle, make it be screen shape, and then injection.Usually beat one of screen panel two ends group of steel sheet pile to design elevation or certain depth, and strictly control verticality, electricity consumption solid welding fixes on encloses on purlin, then divides 1/3 or 1/2 sheet pile height to squeeze in order in centre.
6) sequence of construction that screen-type squeezes into method have forward sequence, reverse order, repetitive sequence, in point order, neutralization order and composite sequence.Flexible, sheet pile wall the concavo-convex and piling efficiency of injection order to sheet pile verticality, displacement, axis direction has a direct impact.Therefore, injection order is one of key of sheet pile construction technology.Its selection principle is: when the sheet pile set when screen panel two ends is reverse inclination, should adopt forward sequence injection; Otherwise, use reverse order injection; When screen panel two ends sheet pile keeps vertical condition, repetitive sequence injection can be adopted; When sheet pile wall length is very long, available composite sequence injection.
7) should change injection order in construction as the case may be, adopt one or more injection orders, progressively beat to design elevation by sheet pile, the degree of depth once squeezed into is generally 0.5-3.0 rice.
Larsen steel sheet pile sets tolerance standard and should control within Larsen steel sheet pile misalignment of axe soil 10cm, and within the stake top mark discrepancy in elevation ± 10cm, steel sheet pile verticality differs within 1.5%.
8) close button and bury and be not less than 2 meters after ensureing excavation, ensures that Larsen steel sheet pile closes up smoothly; Particularly four angles of active well will use corner Larsen steel sheet pile, if do not have this type of Larsen steel sheet pile, then with ancillary method sealings such as old tire or rotten cloth stuff up a cracks.
9) after squeezing into Larsen steel sheet pile, carry out the Watertightness inspection of pile body in time, repair by welding is carried out to the place of leaking, send every day special messenger to carry out inspection pile body.
(5) cut the earth
1) is carrying out Yield rainfall relation work before soil excavation, is keeping anhydrous in foundation ditch, be convenient to cut the earth, mechanical imports and exports passage and surrounding adopt change fill out and place mat steel plate with diffusion pressure, reduce lateral pressure.
2) soil excavation answers layering and zoning sequential production, and symmetrical excavation, 1 meter of below soil excavation to sheet pile top, carries out steel and encloses purlin Construction of Supporting.
3) work progress of shoveling and prestressed anchor must closely cooperate, under shoveling process will ensure safe prerequisite, rapidly for anchor bolt construction creates work plane, anchor pole must produce integral rigidity quickly or pretightning force fixes Larsen steel sheet pile, both coordinate just can utilize tau-effect in soft soil construction preferably, the distortion of control retaining design after stressed effectively.Earthwork construction requires layering uniform high-efficiency, is in normal stress to make supporting and protection structure.
(6) prestressed anchor construction
Prestressed anchor adopts HRB400 level Φ 22 or Φ 25 reinforcing bar, and length is 15m ~ 22m, arranges vertical interval 2.5m, level interval 2m ~ 2.5m up and down, 15 °, inclination angle.
1) locate: the construction line-putting, marks anchor hole position, and position, hole allowable variation is ± 15mm; Pitch-row error is no more than 150mm.
2) hole: boring is round and directly, boring direction is as far as possible vertical with primary structure face, rock stratum; Anchor pole aperture is greater than body of rod diameter 15mm.Drilling depth will meet following requirements: anchor pole hole depth allowable variation is ± 50mm; Drilling quality and anchor pole quality of materials are the bases of anchor bolt construction quality, guarantee that each root anchor pole can play the effect of supporting.
3) clear hole: with high-pressure air hose by dust in hole and foreign material blowout.
4) mortar preparation: adopt and be not less than 42.5 grades and the Portland cement with the chemical stability of opposing water erosion, unify mix anchor pole mortar by coordination in works in mixing station.
5) anchor pole prepare: by designing requirement intercept the body of rod, and straightening, except embroider and oil removing.
6) slip casting: bolt grouting adopts hole-bottom slurry-injection method, and grouting pressure is 0.2-0.3MPa.Cement injection mortar after hole depth, aperture acceptance(check), the construction requirement of conventional cement mortar anchor pole is as follows: mortar uniform mixing, with mix with, the mortar once mixed and stirred will be finished before initial set.Mortar quality guarantees the core of adhesion stress and anchored force, must give one's full attention to, and is finished before being strict controlled in initial set, and will observe following provisions:
1. when slip casting starts or suspends more than 30 minutes, with water lubrication pulp injection tank and pipeline thereof halfway.
2. injected hole mouth pressure controls between 0.2 ~ 0.3Mpa.
3. Grouting Pipe will be inserted to 5 ~ 10cm place at the bottom of distance hole, and the injection with cement mortar is slowly at the uniform velocity extracted, until fill.
7) anchor pole is inserted: rapid in anchor bar body insertion immediately after slip casting terminates, the length in anchor rod body patchhole must not be shorter than 95% of design length.If aperture is flowed out without mortar, anchor bar body must be extracted slip casting again.
8) perforations adding: closely knit for anchor pole mouth place filled with mortar.
(7) Larsen steel sheet pile is pulled out
Excavator vibration hammer is adopted to carry out vibration pile pulling.Vibration pile pulling utilizes vibrating hammer to apply vibration force to sheet pile, disturbed soil, destroys frictional resistance between itself and sheet pile and absorption affinity and apply to hang lift and stake extracted.This method efficiency is high, easy and simple to handle.
Note the load condition of a machine during pile pulling, when discovery being pulled out difficulty or pull out to come up, should pile pulling be stopped, down hammering 0.5m ~ 1.0m after first vibrating 1min ~ 2min again into shape and up extricate oneself from a predicament and brace oneself up to action again, so repeatedly stake can be pulled out.
Pile pulling order first from the end of enclosure wall, can should be pulled out at interval if desired.Pile pulling order is general contrary with piling order.
(8) stake holes backfill
To the stake holes stayed after pile pulling, process must be backfilled in time.Suspend pulling after 1m is often lifted in stake, vibration a few minutes allow native hole tamp.After stake holes extracted by steel plate, remaining space should be tamped by 1:1 cement mortar in time.
(9) pit retaining monitoring
1) pattern foundation pit supporting structure horizontal displacement observation
Excavation slope top is arranged baseline (one, every foundation ditch limit), every bar baseline is established 1 ~ 3 deformation observation point, simultaneously again as settlement observation point.
2) pattern foundation pit supporting structure settlement observation
Utilize away from the elevation system level control point, city of place or the independent bench mark Fixed Initial Point as settlement observation, and put translocation above, form pattern foundation pit supporting structure settlement observation net.
Four sides enclosure wall periphery respectively arranges four settlement observation points, forms the settlement observation net of monitoring surrounding enviroment together with foundation ditch periphery shallow foundation building, important pipeline monitoring point.
Domestic conventional Larsen steel sheet pile model mainly contains several as follows:
Domestic conventional Larsen steel sheet pile construction machinery mainly contains several as follows:
| Device name | Model | Equipment effect |
| Hydraulic vibration pile sinking machine | Z550 | Beat Larsen steel sheet pile |
| Hydraulic vibration driver | MIL-2000 | Be installed on excavator and beat Larsen steel sheet pile |
| Crawler single bucket excavator | W-1001 | Grooving, the piling of cooperation hydraulic vibration driver |
| Truck crane | Coordinate and pull out Larsen steel sheet pile | |
| Vibrations extractor | Pull out Larsen steel sheet pile |
Larsen steel sheet pile can process and solve the series of problems occurred in mining process; Use the safety that steel sheet pile can provide necessary, and (disaster relief and rescue) is ageing stronger; The requirement to space can be reduced; Not by the restriction of weather condition; In the process using steel sheet pile, the complicated process checking material or systematic function can be simplified; Ensure its compliance, interchangeability is good.Have so many unique function and advantage just, thus the purposes of Larsen steel sheet pile widely, such as architectural at permanent structure, can be used for harbour, unloading apron, levee revetment, revetment, shelves cob wall, mole, trraning pole, dock, gate etc.; On temporary structure thing, can be used for sealing a mountain pass, expand bank temporarily, gear soil, dash, sand stop wall etc. that cutout, bridge construction cofferdam, large-scale pipeline lay interim irrigation canals and ditches excavation; In flood-fighting, can be used for flood control, anti-collapse, collapse, anti-drift sand etc.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (3)
1. the foundation pit enclosure structure that combines of a Larsen steel sheet pile and prestressed anchor, it is characterized in that: mainly comprise Larsen steel sheet pile (1) and prestressed anchor (4), the limit, top four of foundation ditch (8) is provided with guide-localization bracket (3), some Larsen steel sheet piles (1) are provided with in groove (2), groove (2) has been dug in the periphery at foundation ditch (8) top, Larsen steel sheet pile (1) is provided with prestressed anchor (4), foundation ditch (8) bottom is provided with basement bottom board (6) and load transfering strip (7), basement bottom board (6) is fixedly connected with Larsen steel sheet pile (1) by load transfering strip (7), certain interval is retained between described guide-localization bracket (3) and Larsen steel sheet pile (1).
2. the foundation pit enclosure structure that combines of Larsen steel sheet pile according to claim 1 and prestressed anchor, it is characterized in that: described guide-localization bracket (3) is made up of guide pile and nose girder, guide pile is the steel pipe pile of diameter 50cm, and nose girder adopts No. 40 i iron to process.
3. the foundation pit enclosure structure that combines of Larsen steel sheet pile according to claim 1 and prestressed anchor, is characterized in that: described prestressed anchor (4) encloses purlin (5) drawknot locking Larsen steel sheet pile (1) by steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520083415.XU CN204491626U (en) | 2015-02-05 | 2015-02-05 | The foundation pit enclosure structure that Larsen steel sheet pile and prestressed anchor combine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520083415.XU CN204491626U (en) | 2015-02-05 | 2015-02-05 | The foundation pit enclosure structure that Larsen steel sheet pile and prestressed anchor combine |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107675713A (en) * | 2017-10-26 | 2018-02-09 | 中交二航局第三工程有限公司 | Pattern foundation pit supporting structure Larsen steel sheet pile system and construction method |
| CN109610476A (en) * | 2019-01-31 | 2019-04-12 | 上海宝钢工程咨询有限公司 | Steel pipe Larsen sheet pile precipitation building enclosure |
| CN109610477A (en) * | 2019-01-31 | 2019-04-12 | 上海宝钢工程咨询有限公司 | Large area mud liquid soil layer foundation pit suspension supporting integrated construction structures and methods |
| CN110158605A (en) * | 2019-07-05 | 2019-08-23 | 马鞍山十七冶工程科技有限责任公司 | A kind of foundation pit method of construction |
| CN110424405A (en) * | 2019-08-06 | 2019-11-08 | 中建一局集团建设发展有限公司 | A kind of soft clay area phreatic high foundation pit supporting construction and its construction method |
| CN111622203A (en) * | 2020-05-18 | 2020-09-04 | 宁波市园林工程有限公司 | Soft foundation structure and processing method thereof |
| CN111877264A (en) * | 2020-07-14 | 2020-11-03 | 中交三航局第三工程有限公司 | Self-anchored light bank protection system |
| CN112112166A (en) * | 2020-08-25 | 2020-12-22 | 中建八局第二建设有限公司 | Self-balancing support construction method for Larsen steel sheet pile under complex geological condition through squeezing silt |
| CN113309122A (en) * | 2021-06-02 | 2021-08-27 | 甘肃路桥第四公路工程有限责任公司 | Larsen steel sheet pile underwater tie beam construction method |
| CN117868158A (en) * | 2024-03-11 | 2024-04-12 | 中国电建集团西北勘测设计研究院有限公司 | Recovery assembly type standard part supporting structure |
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2015
- 2015-02-05 CN CN201520083415.XU patent/CN204491626U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107675713A (en) * | 2017-10-26 | 2018-02-09 | 中交二航局第三工程有限公司 | Pattern foundation pit supporting structure Larsen steel sheet pile system and construction method |
| CN109610476A (en) * | 2019-01-31 | 2019-04-12 | 上海宝钢工程咨询有限公司 | Steel pipe Larsen sheet pile precipitation building enclosure |
| CN109610477A (en) * | 2019-01-31 | 2019-04-12 | 上海宝钢工程咨询有限公司 | Large area mud liquid soil layer foundation pit suspension supporting integrated construction structures and methods |
| CN109610476B (en) * | 2019-01-31 | 2024-05-17 | 上海宝钢工程咨询有限公司 | Steel pipe Larson sheet pile precipitation building envelope |
| CN110158605A (en) * | 2019-07-05 | 2019-08-23 | 马鞍山十七冶工程科技有限责任公司 | A kind of foundation pit method of construction |
| CN110158605B (en) * | 2019-07-05 | 2020-11-27 | 马鞍山十七冶工程科技有限责任公司 | Foundation pit construction method |
| CN110424405A (en) * | 2019-08-06 | 2019-11-08 | 中建一局集团建设发展有限公司 | A kind of soft clay area phreatic high foundation pit supporting construction and its construction method |
| CN111622203B (en) * | 2020-05-18 | 2021-10-01 | 宁波市园林工程有限公司 | Soft foundation structure and processing method thereof |
| CN111622203A (en) * | 2020-05-18 | 2020-09-04 | 宁波市园林工程有限公司 | Soft foundation structure and processing method thereof |
| CN111877264A (en) * | 2020-07-14 | 2020-11-03 | 中交三航局第三工程有限公司 | Self-anchored light bank protection system |
| CN112112166A (en) * | 2020-08-25 | 2020-12-22 | 中建八局第二建设有限公司 | Self-balancing support construction method for Larsen steel sheet pile under complex geological condition through squeezing silt |
| CN113309122A (en) * | 2021-06-02 | 2021-08-27 | 甘肃路桥第四公路工程有限责任公司 | Larsen steel sheet pile underwater tie beam construction method |
| CN117868158A (en) * | 2024-03-11 | 2024-04-12 | 中国电建集团西北勘测设计研究院有限公司 | Recovery assembly type standard part supporting structure |
| CN117868158B (en) * | 2024-03-11 | 2024-06-04 | 中国电建集团西北勘测设计研究院有限公司 | Recovery assembly type standard part supporting structure |
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| C14 | Grant of patent or utility model | ||
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| 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: 20150722 Termination date: 20160205 |