CN101294496A - Slip casting control shield attitude and deviation correcting construction method - Google Patents
Slip casting control shield attitude and deviation correcting construction method Download PDFInfo
- Publication number
- CN101294496A CN101294496A CNA200810039492XA CN200810039492A CN101294496A CN 101294496 A CN101294496 A CN 101294496A CN A200810039492X A CNA200810039492X A CN A200810039492XA CN 200810039492 A CN200810039492 A CN 200810039492A CN 101294496 A CN101294496 A CN 101294496A
- Authority
- CN
- China
- Prior art keywords
- shield
- slip casting
- grouting
- attitude
- shield machine
- 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.)
- Pending
Links
Images
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a construction method for controlling the posture of a shield by grouting, and for deviation rectification. The method comprises the following steps: first, grouting holes are additionally arranged on a shield shell body; second, grouting material is prepared; third, grout used for grouting is stored and transported; fourth, grouting is performed to the shield shell body. The method adopts shearing resistant high gravity single slurry mainly including sand as the grouting material, grouting is performed through the grouting holes of the shield shell body, and the purposes of shield posture adjustment and deviation rectification can be achieved. The method has the advantages that the method is simple and feasible, the effect is obvious, and meanwhile, the influence of the shield construction to the periphery environment can be reduced. Therefore, the method is especially suitable for the tunnel construction of the large-scale shield, and can particularly be used for shield posture adjustment and deviation rectification during the construction of the shield with ultra large diameter larger than 11 m.
Description
Technical field:
The present invention relates to the shield construction method in tunnel, particularly a kind of job practices that adopts grouting mode to control shield attitude and correction belongs to construction engineering technical field.
Background technology:
The axial line control of shield machine is a crucial link in the shield tunnel construction process, can keep good shield attitude in progradation be that pipe sheet assembling carries out and the key that improves into ring tunnel quality smoothly, in addition, become the endless tube sheet to rely on as the back seat that shield machine advances, its assembly unit quality advances the shield structure and plays vital guide effect.With regard to present shield-tunneling construction, the correction of shield attitude realizes the difference of each subregion pressure mostly by the marshalling to jack, thereby reaches the purpose of adjusting shield attitude.Concerning small-sized shield structure, this job practices can be stabilized in shield attitude within the design standard more easily, but for ultra-large type shield structure, because its deadweight is big and center of gravity is forward, the phenomenon so in progradation, kowtow easily, thus cause shield attitude to be difficult to reach design and construction requirement.
Find through literature search prior art, application number is that 200510029898.6 Chinese patent application " the ballast method for correcting error of side rolling in the double-O-tube shield tunnel construction " discloses and a kind ofly utilizes the lead deadweight that double-O-tube shield is carried out local ballast to solve the attitude method for correcting error of shield structure side rolling in the double-O-tube shield tunnel construction, but this method only is applicable to double-O-tube shield, and is not suitable for single targe structure.Also find in the retrieval, application number is that 200510111124.8 Chinese patent application " real-time automatic correction method of shield attitude and its device " discloses the program of a kind of utilization based on the space vector theory, automatically calculate and obtain the shield attitude parameter, then by pressure subregion control model or jack marshalling control model, adopt special shield attitude automatic deviation correction software to control the method for correcting error of shield attitude, yet this shield structure method for correcting error still is to organize into groups control model based on pressure subregion control model or jack, still has the shortcoming that is difficult to adapt to large-scale shield structure.
Summary of the invention:
Technical problem to be solved by this invention is to overcome problems of the prior art, provide a kind of and can be applicable to the slip casting control shield attitude of large-scale shield structure and the job practices of correction, require reasonably to select slip casting point on the shield structure housing according to correction, adopt the anti-shearing single liquid pulp material of high specific gravity shield structure housing to be carried out slip casting by injected hole, in the slip casting process, control simultaneously grouting pressure and grouting amount well, thereby reach the purpose of adjusting shield attitude and correction, it has simple possible, obvious results advantage.
The present invention is achieved through the following technical solutions:
The job practices of a kind of slip casting control shield attitude and correction, its concrete steps are as follows:
(1) the shield machine housing is set up injected hole
The injected hole of being set up evenly distributes along the circumference of shield machine housing, and its quantity is determined according to shield structure diameter;
(2) preparation injecting paste material
Described injecting paste material is for starching based on the anti-shearing single liquid of the high specific gravity of sand, by the strictness of design proportioning the each component material is carried out weighing during preparation, mixing the back forces to stir in slurry mixing tank, the slurries that are mixed with must reach following index request: slump is 10～14cm, yield strength 〉=600pa;
(3) deposit and transportation grouting slurries
The grouting slurries that are mixed with are stored in the slurry tube on the shield machine vehicle frame in order to using, and are provided with mixing plant in this slurry tube, so that in transportation and storage process slurries are carried out continuous stirring, the slump of assurance slurries remains in 8～12cm scope;
(4) the shield machine housing is carried out slip casting
A, selection slip casting point
According to the relative position in current attitude of shield machine and trend, shield structure and moulding tunnel and the correction amplitude of expectation,, reasonably select some injected holes as the slip casting point in conjunction with the operation requirement of the propelling of shield structure, pipe sheet assembling;
B, outside the shield machine housing, carry out slip casting by the injected hole on the slip casting point
Carry out in the process of slip casting at the application injecting paste material, the control grouting pressure remains on setting value P, and the control grouting amount is 0.5m
3～1m
3, monitor the variation of grouting pressure simultaneously, and grouting amount adjusted according to construction effect.
The job practices of slip casting control shield attitude of the present invention and correction, the described injected hole mutual spacing of its step (1) is 2～3 meters; The time that the described pressure of its step (2) is stirred is 1.5 minutes; The described grouting pressure setting value of its step (4) B P determines by following relational expression:
P＝P1+P2+P3
Wherein, P1 is this slip casting point earth pressue at rest value,
P2 is a Grouting Pipe loss pressure, according to the actual value of shield machine,
P3 is that grouting pressure is poor, gets 1.5Bar.
Unlike the prior art be, the job practices of slip casting control shield attitude of the present invention and correction adopts based on the anti-shearing single liquid slurry of the high specific gravity of sand as injecting paste material, injected hole by the shield machine housing carries out slip casting, to reach the purpose of adjusting shield attitude and correction.So means simple possible of the present invention, have very strong operability and economy, and the effect that attitude of shield machine is adjusted is obvious, improved the pipe sheet assembling quality effectively, simultaneously can also reduce the influence of shield-tunneling construction to surrounding enviroment, so be specially adapted to the constructing tunnel of large-scale shield structure, especially be adapted at diameter greater than being used to adjust shield attitude and correction in 11 meters the super-large diameter shield-tunneling construction.
Description of drawings:
Fig. 1 is construction process figure of the present invention.
Fig. 2 is that the shield structure of embodiment the 1st～31 ring (adopting before the inventive method) advances the height measurement datagram.
Fig. 3 is that the shield structure of embodiment the 13rd～65 ring advances the height measurement datagram.
The specific embodiment:
Below in conjunction with specific embodiment the present invention is described in further detail.Present embodiment has adopted technical scheme of the present invention to construct, and it has provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
With certain shield tunnel construction engineering is example, and this project adopts the construction of diameter phi 14.87m gasbag-type slurry balance shield, belongs to ultra-large type shield structure.Shield structure main frame always weighs 1900 tons, and length is 12.65 meters, and its center of gravity is at 4.3 meters of distance cutterhead otch, and center of gravity is preceding partially and weight is bigger than normal brings sizable difficulty for the adjustment of shield attitude.Long 1270 meters of tunnel, single shell lining is adopted in lining cutting, is general ring wedge shape section of jurisdiction, external diameter 14.5m, 13.3 meters of internal diameters, 2 meters of ring widthes.Plane, tunnel axis slightly is instead " S " type, and minimum profile curvature radius is 1000m; Vertical axis is " V " type, maximum gradient 4.5%.8.6 meters of the most shallow earthing in tunnel.According to Shanghai City specifications of engineering construction " shield tunnel engineering construction and standards of acceptance " (DGJ08-233-1999), the constructing tunnel quality specifications is as follows: axis plane deviation≤100mm, axis elevation deviation≤100mm.
This project has adopted the job practices of slip casting control shield attitude of the present invention and correction shield attitude is adjusted and to be rectified a deviation, and its process is as follows:
(1) the shield machine housing is set up injected hole
Between the shield machine installation period, determine that according to shield structure diameter φ 14.87m set up 19 injected holes on the shield machine housing, this injected hole evenly distributes along the circumference of shield machine housing, its mutual spacing is 2.6m.Simultaneously injected hole is carried out the test of injection test slurry, guarantee that slip casting is smooth and easy.
(2) preparation injecting paste material
Injecting paste material is for starching based on the anti-shearing single liquid of the high specific gravity of sand, and its design proportioning is sand 60%, lime 5%, flyash 15%, swell soil 4%, water 15%.Strictness is carried out weighing in proportion to the each component material during preparation, mixes the back and forces to stir in slurry mixing tank, and mixing time is 1.5 minutes.The slurries that are mixed with must reach following index request: slump 10～14cm, and yield strength 〉=600pa, in the present embodiment, the slurries that are mixed with reach slump 10～14cm, yield strength 800pa.Joining the used Weighing system of slurry regularly examines and determine by national regulation.
(3) deposit and transportation grouting slurries
The grouting slurries that are mixed with are stored in the slurry tube on the shield machine vehicle frame in order to using, be provided with mixing plant in this slurry tube, this mixing plant constantly carries out continuous stirring to slurries in transportation and storage process, the slump that guarantees slurries remains in 8～12cm scope, in the present embodiment, slurries slump in transportation and storage process remains at 8～12cm.
(4) the shield machine housing is carried out slip casting
In the present embodiment, do not adopt slip casting at the initial stage that the shield structure advances, so shield structure elevation is difficult to control, shield machine keeps the downward attitude of head to advance always, and shield tail elevation reaches-219mm when being advanced into 31 rings, seriously exceeds design standard (seeing Fig. 1 for details).In the whole progradation, no matter adopt and adjust the deviation that shield structure center line and design axis are still adjusted in the jack marshalling, all uncontrollable firmly shield machine trend down.
Present embodiment is used the job practices of slip casting control shield attitude of the present invention and correction since the 32nd ring, and its process is as follows:
A, selection slip casting point
According to the relative position in current attitude of shield machine and trend, shield structure and moulding tunnel and the correction amplitude of expectation,, reasonably select some injected holes as the slip casting point in conjunction with the operation requirement of the propelling of shield structure, pipe sheet assembling.In the present embodiment, because shield machine keeps the head downtrend always, so the injected hole of selection shield structure lower housing portion is as the slip casting point.
B, outside the shield machine housing, carry out slip casting by the injected hole on the slip casting point
Carry out in the process of slip casting at the application injecting paste material, must control grouting pressure and grouting amount at any time, grouting amount is controlled at 0.5m
3～1m
3Scope in, grouting pressure remains on setting value P, this grouting pressure setting value P determines by following relational expression:
P＝P1+P2+P3
Wherein, P1 is this slip casting point earth pressue at rest value,
P2 is a Grouting Pipe loss pressure, according to the actual value of shield machine,
P3 is that grouting pressure is poor, gets 1.5Bar.
Above-mentioned grouting pressure setting value P is by researchs such as a large amount of test in situ, physical simulation experiment and numerical simulation analysis, and determine by continuous application and optimization in engineering.Must monitor the variation of grouting pressure in the process of slip casting at any time, and grouting amount and grouting pressure be adjusted according to construction effect.
In the present embodiment, the slip casting of shield machine housing divides two stages to carry out:
Phase I: during the pipe sheet assembling.
During pipe sheet assembling, there is sinkage in shield machine, and deflection reaches 1～2cm, after the propelling of shield structure is finished, before the pipe sheet assembling, is that the control shield machine sinks therefore, in time selects injected hole to carry out slip casting as the slip casting point in shield structure lower housing portion.In the slip casting process, grouting amount is 0.5～2m
3, grouting pressure remains on setting value P=6～8Bar.The control of grouting pressure and grouting amount must in time be adjusted according to the monitoring result feedback.It seems that from the construction practice sinkage substantially no longer takes place shield machine after the slip casting, thereby the attitude control that follow-up shield machine advances is brought good start, illustrate that housing slip casting control shield machine sinking effect is obvious.
Second stage: during the shield structure advances
During the shield structure advances, by the injected hole on the shield structure housing slip casting is carried out in the shield machine bottom, grouting amount is 0.5～2m
3, grouting pressure remains on setting value P=6～8Bar.In slip casting, observe the variation of attitude of shield machine situation of change and monitoring grouting pressure at any time, slip casting point, grouting pressure and grouting amount are in time made adjustment according to the feedback data that changes.When advancing, should avoid once the amount of correction excessive, and should progressively shield attitude slowly be adjusted to the design axis the correction of shield attitude.
In the present embodiment, the job practices of described slip casting control shield attitude and correction is applied in the progradation of totally 17 rings (the 32nd～48 ring), the attitude adjusted of shield structure is to the scope of design till the 48th ring, and the shield structure that concrete data see Fig. 3 embodiment the 13rd～65 ring for details advances the height measurement datagram.After this in whole tunnel advanced, shield attitude was in controllable state always, remained in the critical field of design axis.
Claims (4)
1, the job practices of a kind of slip casting control shield attitude and correction, it is characterized in that: concrete steps are as follows:
(1) the shield machine housing is set up injected hole
The injected hole of being set up evenly distributes along the circumference of shield machine housing, and its quantity is determined according to shield structure diameter;
(2) preparation injecting paste material
Described injecting paste material is for starching based on the anti-shearing single liquid of the high specific gravity of sand, by the strictness of design proportioning the each component material is carried out weighing during preparation, mixing the back forces to stir in slurry mixing tank, the slurries that are mixed with must reach following index request: slump is 10～14cm, yield strength 〉=600pa;
(3) deposit and transportation grouting slurries
The grouting slurries that are mixed with are stored in the slurry tube on the shield machine vehicle frame in order to using, and are provided with mixing plant in this slurry tube, so that in transportation and storage process slurries are carried out continuous stirring, the slump of assurance slurries remains in 8～12cm scope;
(4) the shield machine housing is carried out slip casting
A, selection slip casting point
According to the relative position in current attitude of shield machine and trend, shield structure and moulding tunnel and the correction amplitude of expectation,, reasonably select some injected holes as the slip casting point in conjunction with the operation requirement of the propelling of shield structure, pipe sheet assembling;
B, outside the shield machine housing, carry out slip casting by the injected hole on the slip casting point
Carry out in the process of slip casting at the application injecting paste material, the control grouting pressure remains on setting value P, and the control grouting amount is 0.5m
3～1m
3, monitor the variation of grouting pressure simultaneously, and grouting amount adjusted according to construction effect.
2, the job practices of slip casting control shield attitude according to claim 1 and correction is characterized in that: the described injected hole mutual spacing of step (1) is 2～3 meters.
3, the job practices of slip casting control shield attitude according to claim 1 and correction is characterized in that: the time that the described pressure of step (2) is stirred is 1.5 minutes.
4, the job practices of slip casting control shield attitude according to claim 1 and correction is characterized in that: the described grouting pressure setting value of step (4) B P determines by following relational expression:
P＝P1+P2+P3
Wherein, P1 is this slip casting point earth pressue at rest value,
P2 is a Grouting Pipe loss pressure, according to the actual value of shield machine,
P3 is that grouting pressure is poor, gets 1.5Bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810039492XA CN101294496A (en) | 2008-06-25 | 2008-06-25 | Slip casting control shield attitude and deviation correcting construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810039492XA CN101294496A (en) | 2008-06-25 | 2008-06-25 | Slip casting control shield attitude and deviation correcting construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101294496A true CN101294496A (en) | 2008-10-29 |
Family
ID=40065000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810039492XA Pending CN101294496A (en) | 2008-06-25 | 2008-06-25 | Slip casting control shield attitude and deviation correcting construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101294496A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031982A (en) * | 2010-06-12 | 2011-04-27 | 中铁十六局集团有限公司 | Tunneling construction Ttechnology for constructing mined tunnelof by adopting composite tooth support through mining method |
| CN102102522A (en) * | 2010-12-30 | 2011-06-22 | 浙江大学 | Track and posture composite control method in shield tunneling process |
| CN102996135A (en) * | 2012-12-11 | 2013-03-27 | 上海市基础工程有限公司 | Construction method for crossing for complex formation of shield under ultra-deep earth |
| CN103032076A (en) * | 2012-12-08 | 2013-04-10 | 中铁十二局集团第二工程有限公司 | Method for correcting unconformable surface stratum shield tunneling construction |
| CN103603670A (en) * | 2013-11-21 | 2014-02-26 | 上海市基础工程集团有限公司 | Construction method of ultra-deep-earthed shield crossing complex formations |
| CN104481548A (en) * | 2014-11-01 | 2015-04-01 | 中铁一局集团有限公司 | Tunnel face cavity processing method for shield tunnel construction |
| CN105909270A (en) * | 2016-04-19 | 2016-08-31 | 上海建科工程咨询有限公司 | Shield machine axis control system |
| CN107165642A (en) * | 2017-06-06 | 2017-09-15 | 中铁十九局集团轨道交通工程有限公司 | Accurately control the shield construction method of ground settlement |
| CN108316935A (en) * | 2018-02-02 | 2018-07-24 | 中铁隧道局集团有限公司 | A kind of shield machine attitude adjusting method of complex controll |
| CN108868808A (en) * | 2018-08-08 | 2018-11-23 | 淮南中泰矿山装备制造有限公司 | The anti-bias mechanism of pipe jacking tunnelling machine |
| CN109340454A (en) * | 2018-09-27 | 2019-02-15 | 上海公路桥梁（集团）有限公司 | RC pipejacking method for correcting error |
| CN109538221A (en) * | 2018-11-06 | 2019-03-29 | 山东大学 | A kind of fill method for filling shield tunnel gap and the shield machine for realizing this method |
| CN110552714A (en) * | 2019-09-16 | 2019-12-10 | 中铁十二局集团有限公司 | Method for treating over-limit of local axis of shield tunnel |
| CN111764916A (en) * | 2020-07-02 | 2020-10-13 | 中铁十四局集团有限公司 | Sealing method of sealing system of shield tail of shield machine |
| CN112065416A (en) * | 2020-10-24 | 2020-12-11 | 中铁一局集团有限公司 | Construction method for vertical deviation correction in shield tunneling |
| CN112922609A (en) * | 2021-02-05 | 2021-06-08 | 中国铁建重工集团股份有限公司 | Intelligent tunneling method of shield tunneling machine |
| CN114109408A (en) * | 2021-11-23 | 2022-03-01 | 中铁隧道局集团有限公司 | Front-mounted shield tunneling attitude control system |
-
2008
- 2008-06-25 CN CNA200810039492XA patent/CN101294496A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031982A (en) * | 2010-06-12 | 2011-04-27 | 中铁十六局集团有限公司 | Tunneling construction Ttechnology for constructing mined tunnelof by adopting composite tooth support through mining method |
| CN102031982B (en) * | 2010-06-12 | 2014-02-12 | 中铁十六局集团有限公司 | Tunneling construction technology by adopting composite tooth support through mining method |
| CN102102522A (en) * | 2010-12-30 | 2011-06-22 | 浙江大学 | Track and posture composite control method in shield tunneling process |
| CN103032076A (en) * | 2012-12-08 | 2013-04-10 | 中铁十二局集团第二工程有限公司 | Method for correcting unconformable surface stratum shield tunneling construction |
| CN103032076B (en) * | 2012-12-08 | 2015-03-18 | 中铁十二局集团第二工程有限公司 | Method for correcting unconformable surface stratum shield tunneling construction |
| CN102996135A (en) * | 2012-12-11 | 2013-03-27 | 上海市基础工程有限公司 | Construction method for crossing for complex formation of shield under ultra-deep earth |
| CN102996135B (en) * | 2012-12-11 | 2015-06-24 | 上海市基础工程集团有限公司 | Construction method for crossing for complex formation of shield under ultra-deep earth |
| CN103603670A (en) * | 2013-11-21 | 2014-02-26 | 上海市基础工程集团有限公司 | Construction method of ultra-deep-earthed shield crossing complex formations |
| CN104481548A (en) * | 2014-11-01 | 2015-04-01 | 中铁一局集团有限公司 | Tunnel face cavity processing method for shield tunnel construction |
| CN104481548B (en) * | 2014-11-01 | 2016-05-11 | 中铁一局集团有限公司 | A kind of shield tunnel construction face void handling method |
| CN105909270A (en) * | 2016-04-19 | 2016-08-31 | 上海建科工程咨询有限公司 | Shield machine axis control system |
| CN107165642A (en) * | 2017-06-06 | 2017-09-15 | 中铁十九局集团轨道交通工程有限公司 | Accurately control the shield construction method of ground settlement |
| CN108316935A (en) * | 2018-02-02 | 2018-07-24 | 中铁隧道局集团有限公司 | A kind of shield machine attitude adjusting method of complex controll |
| CN108868808A (en) * | 2018-08-08 | 2018-11-23 | 淮南中泰矿山装备制造有限公司 | The anti-bias mechanism of pipe jacking tunnelling machine |
| CN108868808B (en) * | 2018-08-08 | 2023-11-17 | 淮南中泰矿山装备制造有限公司 | Deviation prevention mechanism of pipe-jacking tunneling machine |
| CN109340454A (en) * | 2018-09-27 | 2019-02-15 | 上海公路桥梁（集团）有限公司 | RC pipejacking method for correcting error |
| CN109538221A (en) * | 2018-11-06 | 2019-03-29 | 山东大学 | A kind of fill method for filling shield tunnel gap and the shield machine for realizing this method |
| CN110552714A (en) * | 2019-09-16 | 2019-12-10 | 中铁十二局集团有限公司 | Method for treating over-limit of local axis of shield tunnel |
| CN111764916A (en) * | 2020-07-02 | 2020-10-13 | 中铁十四局集团有限公司 | Sealing method of sealing system of shield tail of shield machine |
| CN112065416A (en) * | 2020-10-24 | 2020-12-11 | 中铁一局集团有限公司 | Construction method for vertical deviation correction in shield tunneling |
| CN112065416B (en) * | 2020-10-24 | 2023-08-22 | 中铁一局集团有限公司 | Construction method for vertical deviation correction of shield tunneling |
| CN112922609A (en) * | 2021-02-05 | 2021-06-08 | 中国铁建重工集团股份有限公司 | Intelligent tunneling method of shield tunneling machine |
| CN114109408A (en) * | 2021-11-23 | 2022-03-01 | 中铁隧道局集团有限公司 | Front-mounted shield tunneling attitude control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101294496A (en) | Slip casting control shield attitude and deviation correcting construction method | |
| CN113153308B (en) | Construction method for collapse section of double-arch tunnel | |
| CN107587513B (en) | A kind of pile defect handling method of foundation pit supporting pile | |
| CN201025038Y (en) | Adjustable pre-stress steel arch frame | |
| CN100543272C (en) | Diameter surpasses the job practices of 11 meters single casting of shield | |
| CN114840044A (en) | Intelligent pulping and pulp supplying control device and using method thereof | |
| CN110847165A (en) | Construction method of spiral anchor core-inserting cement mixing pile | |
| CN201050062Y (en) | Sand bed soil reinforcing piece | |
| CN204212442U (en) | A kind of hi-Fix guiding device | |
| CN206299188U (en) | A kind of bracket supports component of silo sliding formwork platform | |
| CN105862902A (en) | Steel-concrete nested composite cylinder foundation structure and construction equipment and method thereof | |
| CN107587770A (en) | Disjunctor storehouse synchronization slding form operation method | |
| CN208759772U (en) | Canopy and its precast reinforced concrete frame beam are poured after one kind | |
| CN103711316A (en) | Control method of intelligent pulping and grouting system | |
| CN104314318B (en) | A kind of high accuracy positioning guider and its application method | |
| CN208328976U (en) | Wind-powered electricity generation expanded type hollow concrete cushion cap vertical prestressed anchor cables duct applies device | |
| CN214993788U (en) | Assembled cement soil composite pile | |
| CN103306688B (en) | Construction method of synchronous grouting process for ground in-out shield-driven tunnel | |
| CN208441871U (en) | A kind of interior formed of large diameter shield tunnel digs station structure | |
| CN208088326U (en) | A kind of lag pile formula bearing being used to support pile framing | |
| CN203050207U (en) | Cone hopper bin jig frame formwork | |
| CN206646545U (en) | A kind of Large Tube, case prefabricated components for plane docking | |
| CN207672737U (en) | A kind of overhanging bracket structure | |
| CN207794320U (en) | A kind of wall connecting system up and down of installation precast facade | |
| CN206299397U (en) | A kind of mine bolt forces testing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081029 |