CN106437729A - Additive for decreasing shrinkage rate of synchronous grouting materials - Google Patents

Additive for decreasing shrinkage rate of synchronous grouting materials Download PDF

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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
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
Application number
CN201610637346.1A
Other languages
Chinese (zh)
Inventor
江华
张晋勋
江玉生
武富美
丁彦杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China University of Mining and Technology Beijing CUMTB
Beijing Urban Construction Group Co Ltd
Original Assignee
China University of Mining and Technology Beijing CUMTB
Beijing Urban Construction Group Co Ltd
Beijing Urban Construction Design and Development Group Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China University of Mining and Technology Beijing CUMTB, Beijing Urban Construction Group Co Ltd, Beijing Urban Construction Design and Development Group Co Ltd filed Critical China University of Mining and Technology Beijing CUMTB
Priority to CN201610637346.1A priority Critical patent/CN106437729A/en
Publication of CN106437729A publication Critical patent/CN106437729A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039Premixtures of ingredients
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining

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

A kind of additive reducing synchronous grouting material shrinkage factor
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.
CN201610637346.1A 2016-08-08 2016-08-08 Additive for decreasing shrinkage rate of synchronous grouting materials Pending CN106437729A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (7)

* Cited by examiner, † Cited by third party
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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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

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Effective date of registration: 20170317

Address after: 100083 Beijing City, Haidian District Institute of Rutosids No. 11

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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

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Applicant before: China University of Mining & Technology, Beijing

Applicant before: Beijing City Building Group Co., Ltd.

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Application publication date: 20170222