CN106437729A - Additive for decreasing shrinkage rate of synchronous grouting materials - Google Patents
Additive for decreasing shrinkage rate of synchronous grouting materials Download PDFInfo
- Publication number
- CN106437729A CN106437729A CN201610637346.1A CN201610637346A CN106437729A CN 106437729 A CN106437729 A CN 106437729A CN 201610637346 A CN201610637346 A CN 201610637346A CN 106437729 A CN106437729 A CN 106437729A
- Authority
- CN
- China
- Prior art keywords
- additive
- synchronous grouting
- shrinkage factor
- synchronous
- grouting material
- 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
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
Abstract
The invention discloses an additive for decreasing the shrinkage rate of synchronous grouting materials. The additive for decreasing the shrinkage rate of the synchronous grouting materials comprises industrial potash alum and industrial gypsum. The mixing amount of the additive for decreasing the shrinkage rate of the synchronous grouting materials is 5 kg/m<3>, and by adding the additive for decreasing the shrinkage rate of the synchronous grouting materials into shield synchronous grout, shrinkage of the existing synchronous grout materials in a waterless stratum can be remarkably relieved.
Description
Technical field
The present invention relates to shield tail synchronous grouting technical field, more particularly to a kind of minimizing synchronous grouting material shrinkage factor
Additive.
Background technology
During shield-tunneling construction, grouting at the tail of the shield machine is to fill the space backbreak in section of jurisdiction rear portion, preventing ground deformation, in pipe
A kind of form of construction work of concreteness serosity is filled at the piece back side.Shield tail synchronous grouting is synchronously to shield tail during shield driving
Carry out slip casting, so that surrounding rock body obtains timely supporting, thus the sedimentation to upper overburden layer has been played in the space being formed
The control of effect.And in some Soft Soil Layers, when being constructed using balancing earth-pressure shielding machine, the meaning of synchronous grouting is even more important.
Shield method can complete the building it is also possible to build subaqueous tunnel or municipal pipeline of subway in city, and shield
Method synchronous grouting technology is some key technologies in shield construction.Shield synchronization slip casting can be between the construction of shield afterbody
The for example single liquid cement mortar of the material having mixed or dual slurry is filled so that being full of between shield tail after grout cures in gap
Gap, forms support and is allowed to not occur to settle or reduces sedimentation to stratum.
But existing synchronous grouting material can produce obvious shrinkage phenomenon in anhydrous stratum, shrinkage factor about exists
10% about, when there is larger shrinkage phenomenon after the implantation in synchronous grouting material, the control to stratum settlement for the injecting paste material
Ability can weaken, and the ground settlement during shield-tunneling construction can become apparent from.Pass through to synchronous grouting therefore in anhydrous stratum
Adding suitable additive in material to reduce the drying shrinkage phenomenon of serosity is widely studied problem in current engineering.
It is desirable to there being a kind of additive reducing synchronous grouting material shrinkage factor can improve existing synchronous grouting material
Contraction problem in anhydrous stratum for the material.
Content of the invention
It is an object of the invention to provide a kind of additive reducing synchronous grouting material shrinkage factor is overcoming prior art
Present in the problems referred to above.
For achieving the above object, the present invention provides a kind of additive reducing synchronous grouting material shrinkage factor to include：Industry
Alumen and industrial gypsum, the incorporation of the additive of described minimizing synchronous grouting material shrinkage factor is 5kg/m3.
Preferably, after described synchronous grouting material injects in sandy soil stratum, the shrinkage factor of 12h is 4.9%, 24h after injection
Shrinkage factor be 4.9%, after injection the shrinkage factor of 48h be 6.5%.
Preferably, the setting time of described synchronous grouting material is about 10h.
Preferably, after described synchronous grouting material mix finishes, by described additive add mix finish same
In step injecting paste material, and it is sufficiently stirred for about 30min again.
The invention provides a kind of additive reducing synchronous grouting material shrinkage factor, by adding in shield synchronization slip casting
Plus disclosed by the invention reduce synchronous grouting material shrinkage factor additive, just can significantly improve existing synchronous grouting material
Contraction problem in anhydrous stratum.
Brief description
Fig. 1 is the structural representation for synchronous grouting for grouting at the tail of the shield machine.
Specific embodiment
In the present invention one broad embodiment：The present invention provides a kind of additive reducing synchronous grouting material shrinkage factor,
The described additive reducing synchronous grouting material shrinkage factor includes：Industrial Alumen and industrial gypsum, described minimizing synchronous grouting material
The incorporation of the additive of material shrinkage factor is 5kg/m3.
As shown in figure 1, synchronous grouting is grouting at the tail of the shield machine, that is, while shield driving, at the shield tail after a few ring of face,
There is larger gap of the shield tail it is therefore desirable to injection serosity ensures stablizing of stratum in the place that shield tail will be disengaged from section of jurisdiction.
In practice of construction, if simultaneous grouting slurry occurs larger contraction, may result in some risk source areas
Surface subsidence exceedes requirement it is therefore desirable to reduce the contraction of serosity.
In order to ensure the construction effect of serosity and reduce the effect shunk, the parameter of serosity is as follows：
(1) after serosity injects in sandy soil stratum, the shrinkage factor of 12h is 4.9%, and after injection, the shrinkage factor of 24h is 4.9%,
After injection, the shrinkage factor of 48h is 6.5%.
(2) setting time of serosity is about 10.
Mixing serosity：After serosity mix finishes, by the additive addition simultaneous grouting slurry that mix has finished and again
Secondary it is sufficiently stirred for about 30min.
Slip casting：Slip casting is carried out by the tunneling synchronous mud injecting pump of shield system.
The determination of grouting parameter：Grouting pressure and grouting amount are determined according to strata condition and propulsion situation.
Last it is to be noted that：Above example only in order to technical scheme to be described, is not intended to limit.To the greatest extent
Pipe has been described in detail to the present invention with reference to the foregoing embodiments, it will be understood by those within the art that：It is still
Technical scheme described in foregoing embodiments can be modified, or wherein some technical characteristics are carried out with equivalent replacing
Change；And these modifications or replacement, do not make the essence of appropriate technical solution depart from the essence of various embodiments of the present invention technical scheme
God and scope.
Claims (4)
1. a kind of additive reducing synchronous grouting material shrinkage factor is it is characterised in that include：Industrial Alumen and industrial gypsum,
The incorporation of the described additive reducing synchronous grouting material shrinkage factor is 5kg/m3.
2. as claimed in claim 1 reduce synchronous grouting material shrinkage factor additive it is characterised in that：Described synchronous grouting
Material inject in sandy soil stratum after 12h shrinkage factor be 4.9%, after injection the shrinkage factor of 24h be 4.9%, 48h after injection
Shrinkage factor is 6.5%.
3. as claimed in claim 1 reduce synchronous grouting material shrinkage factor additive it is characterised in that：Described synchronous grouting
The setting time of material is about 10h.
4. as claimed in claim 1 reduce synchronous grouting material shrinkage factor additive it is characterised in that：In described synchronous note
After pulp material mix finishes, described additive is added in the synchronous grouting material that mix has finished, and is sufficiently stirred for again
About 30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610637346.1A CN106437729A (en) | 2016-08-08 | 2016-08-08 | Additive for decreasing shrinkage rate of synchronous grouting materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610637346.1A CN106437729A (en) | 2016-08-08 | 2016-08-08 | Additive for decreasing shrinkage rate of synchronous grouting materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106437729A true CN106437729A (en) | 2017-02-22 |
Family
ID=58184749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610637346.1A Pending CN106437729A (en) | 2016-08-08 | 2016-08-08 | Additive for decreasing shrinkage rate of synchronous grouting materials |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106437729A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255799A (en) * | 2008-04-18 | 2008-09-03 | 上海市第二市政工程有限公司 | Tunnel inner micro-destabilization slip-casting technique |
| JP2009109394A (en) * | 2007-10-31 | 2009-05-21 | Shimizu Corp | Method of installing monitoring instrument into rock bed |
| CN101603427A (en) * | 2009-07-10 | 2009-12-16 | 上海隧道工程股份有限公司 | Shield synchronization slip casting construction technology |
| CN101737064A (en) * | 2008-11-20 | 2010-06-16 | 中铁十六局集团有限公司 | Shield synchronous grouting serous fluid |
| CN102584101A (en) * | 2012-01-20 | 2012-07-18 | 南京瑞迪高新技术有限公司 | Special grouting agent for post-tensioned prestressed concrete beams of highway bridges and culverts and preparation method thereof |
| CN103553486A (en) * | 2013-10-14 | 2014-02-05 | 中国人民解放军理工大学 | Fast-hardening and high-strength micro-expansion repair mortar |
| CN105174886A (en) * | 2015-08-25 | 2015-12-23 | 山东大学 | Limestone water-containing layer grouting reconstruction material suitable for superlong-distance pumping |
-
2016
- 2016-08-08 CN CN201610637346.1A patent/CN106437729A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009109394A (en) * | 2007-10-31 | 2009-05-21 | Shimizu Corp | Method of installing monitoring instrument into rock bed |
| CN101255799A (en) * | 2008-04-18 | 2008-09-03 | 上海市第二市政工程有限公司 | Tunnel inner micro-destabilization slip-casting technique |
| CN101737064A (en) * | 2008-11-20 | 2010-06-16 | 中铁十六局集团有限公司 | Shield synchronous grouting serous fluid |
| CN101603427A (en) * | 2009-07-10 | 2009-12-16 | 上海隧道工程股份有限公司 | Shield synchronization slip casting construction technology |
| CN102584101A (en) * | 2012-01-20 | 2012-07-18 | 南京瑞迪高新技术有限公司 | Special grouting agent for post-tensioned prestressed concrete beams of highway bridges and culverts and preparation method thereof |
| CN103553486A (en) * | 2013-10-14 | 2014-02-05 | 中国人民解放军理工大学 | Fast-hardening and high-strength micro-expansion repair mortar |
| CN105174886A (en) * | 2015-08-25 | 2015-12-23 | 山东大学 | Limestone water-containing layer grouting reconstruction material suitable for superlong-distance pumping |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Jiang Hua Inventor after: Zhang Jinxun Inventor after: Jiang Yusheng Inventor after: Wu Fumei Inventor after: Ding Yanjie Inventor before: Jiang Hua Inventor before: Zhang Jinxun Inventor before: Jiang Yusheng Inventor before: Wu Fumei Inventor before: Ding Yanjie |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170317 Address after: 100083 Beijing City, Haidian District Institute of Rutosids No. 11 Applicant after: China University of Mining & Technology, Beijing Applicant after: Beijing City Building Group Co., Ltd. Applicant after: BEIJING URBAN CONSTRUCTION DESIGN & DEVELOPMENT GROUP CO., LIMITED Applicant after: Beijing Urban Rail Transit Construction Engineering Co., Ltd. Address before: 100083 Beijing City, Haidian District Institute of Rutosids No. 11 Applicant before: China University of Mining & Technology, Beijing Applicant before: Beijing City Building Group Co., Ltd. Applicant before: BEIJING URBAN CONSTRUCTION DESIGN & DEVELOPMENT GROUP CO., LIMITED |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180302 Address after: 100083 Beijing City, Haidian District Institute of Rutosids No. 11 Applicant after: China University of Mining & Technology, Beijing Applicant after: Beijing City Building Group Co., Ltd. Address before: 100083 Beijing City, Haidian District Institute of Rutosids No. 11 Applicant before: China University of Mining & Technology, Beijing Applicant before: Beijing City Building Group Co., Ltd. Applicant before: BEIJING URBAN CONSTRUCTION DESIGN & DEVELOPMENT GROUP CO., LIMITED Applicant before: Beijing Urban Rail Transit Construction Engineering Co., Ltd. |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170222 |