CN108691556A - A kind of shield synchronization slip casting and secondary grouting technique - Google Patents
A kind of shield synchronization slip casting and secondary grouting technique Download PDFInfo
- Publication number
- CN108691556A CN108691556A CN201710216241.3A CN201710216241A CN108691556A CN 108691556 A CN108691556 A CN 108691556A CN 201710216241 A CN201710216241 A CN 201710216241A CN 108691556 A CN108691556 A CN 108691556A
- Authority
- CN
- China
- Prior art keywords
- grouting
- shield
- stratum
- slurries
- slip casting
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- 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
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
Abstract
A kind of shield synchronization slip casting of present invention offer and secondary grouting technique, include the following steps:(1) slurries are configured according to stratum monitoring data automatic blending system, (2) slurries configured are delivered to the slurry storage tank of shield machine, (3) slurries in the slurry storage tank are delivered to grouting at the tail of the shield machine pipe, (4) shield tail structure void synchronous grouting is carried out according to dynamic stratum monitoring data, (5) secondary grouting is carried out according to dynamic stratum monitoring data, surface grout injection measure can be taken when necessary, shield duct piece arrangement of reinforcement is suitably reinforced, and add reserved injected hole, to supplement slip casting according to dynamic monitoring situation in the construction process, the beneficial effects of the invention are as follows this section tunnel soil body whole process to be reinforced using tracking two fluid grouting, synchronous grouting is combined with secondary grouting according to dynamic stratum monitoring data, the needs of Different Strata situation can not only be met, and ground deformation amount and section of jurisdiction offset are small, it is safe.
Description
Technical field
The present invention relates to a kind of shield synchronization slip casting and secondary grouting techniques, belong to constructing tunnel field.
Background technology
The type of grouting at the tail of the shield machine is divided into subsequent slip casting, synchronous grouting, timely slip casting and secondary grouting.Wherein, synchronous grouting
It is to work as shield driving, after shield tail is detached from section of jurisdiction, the gap backbreak occurs in the section of jurisdiction back side, to avoid making in Shield Construction Method Used
At stratum deformation, destruction is caused to influence neighbouring structure, and after shield tail disengaging, fill concreteness slurries at the section of jurisdiction back side
A kind of form of construction work.When the control of surface subsidence and tunnel upward floating are required it is relatively stringent in the case of generally noted using synchronous
Slurry, and coordinate secondary grouting as supplement measure.
Synchronous grouting comes with some shortcomings in construction at present:Early strength is low, is easy to isolate, ground deformation amount and section of jurisdiction
Offset is big, grouting quality stability difference etc..
Invention content
The object of the present invention is to provide a kind of shield synchronization slip casting and secondary grouting techniques, and intensity is high, is not easy to isolate, ground
Facial disfigurement amount and section of jurisdiction offset are small, and grouting quality is good, safe.
In order to achieve the above object, the control method that the present invention uses includes the following steps:(1) automatic according to stratum monitoring data
Stirring system configures slurries, and the slurries configured are delivered to the slurry storage tank of shield machine by (2), in (3) described slurry storage tank
Slurries are delivered to grouting at the tail of the shield machine pipe, and (4) carry out shield tail structure void synchronous grouting, (5) basis according to dynamic stratum monitoring data
Dynamic stratum monitoring data carry out secondary grouting.
Preferably, in the step (1), feedback data is monitored according to stratum, the grout coordinate ratio is adjusted, with
The slurries for adapting to stratum condition are obtained, the wherein material of slurries used by synchronous grouting mainly has flyash, sand and water etc..Root
According to stratum monitoring data, the proportioning of the slurry material is adjusted in due course, using optimal slurries are matched, increases the cohesive strength on stratum
And internal friction angle, to improve stratum adhesion strength and compactness, to have the function that reinforcing.
Preferably, in the step (3), it is both provided with pressure sensor on the grouting at the tail of the shield machine pipe, convenient for prison in real time
Grouting pressure is surveyed, slip casting process is preferably controlled in conjunction with grouting pressure and stratum monitoring data, can be made if grouting pressure is excessive
It is damaged at the running pulp even shield duct piece, if grouting pressure deficiency it will cause grouting amounts few, structure void insufficient fill, from
And ground deformation and the shield duct piece is caused to deviate.
Preferably, grouting amount is the 130%~180% of theoretical structure void, and extra large Rake earth pressure balanced shield, EPBS is per ring slip casting
Amount is about 5.46~7.56m3, and Kawasaki earth pressure balanced shield, EPBS is about 5.59~7.74m3 per ring grouting amount, and grouting pressure is balance
1.5 times of soil pressure, specific mud jacking amount and mud jacking point optimize, slurries depending on pressure value and stratum deformation monitoring data when mud jacking
Consistency is generally 9~12.
Preferably, the shield duct piece arrangement of reinforcement is suitably reinforced, and adds reserved injected hole, so as to root in the construction process
Slip casting is supplemented according to dynamic monitoring situation, pressure injection dual slurry forms hoop around tunnel every 5~8 rings when necessary, keeps tunnel vertical
To the intermittent sealing isolation strip of formation.
Preferably, in the step (4), due to the static lateral pressure coefficient and tunnel top buried depth of grouting pressure and stratum
Linear correlation, grouting amount is also related to the infiltration coefficient on stratum, so, during shield crossing construction of railways, it is necessary in conjunction with dynamic
State stratum monitoring data data carry out control slip casting, and injection phase of the fltting speed of shield machine, slurries etc. can also influence
Grouting quality will be accomplished timely, uniform, enough, it is ensured that its structure void is able to timely and enough in entire work progress
Ground deformation and section of jurisdiction offset control are arrived minimum by filling.
The beneficial effects of the invention are as follows:It is reinforced using tracking two fluid grouting, intensity is high, is not easy to isolate, according to dynamic stratum
Synchronous grouting is combined by monitoring data with secondary grouting, can not only meet the needs of Different Strata situation, but also ground becomes
Shape amount and section of jurisdiction offset are small, and grouting quality is good, safe.
Description of the drawings
Fig. 1 is the implementation steps figure of the present invention.
Specific implementation mode
Below against attached drawing, by the description of the embodiment, to the specific implementation mode of the present invention, such as involved each structure
The works such as mutual alignment and connection relation, the effect of each section and operation principle between the shape of part, construction, each section are further
Detailed description.
Referring to Fig. 1, a kind of shield synchronization slip casting of present invention offer and secondary grouting technique comprising following steps:(1) root
Slurries are configured according to stratum monitoring data automatic blending system, the slurries configured are delivered to the slurry storage tank of shield machine by (2), (3)
Slurries in slurry storage tank are delivered to grouting at the tail of the shield machine pipe, (4) carry out shield tail structure void synchronization according to dynamic stratum monitoring data
Slip casting, (5) carry out secondary grouting according to dynamic stratum monitoring data.
Preferably, in step (1), feedback data is monitored according to stratum, adopts an effective measure controlled in time, to slurries
Proportioning is adjusted, and to obtain the optimal slurries for adapting to stratum condition, the material for the slurries that synchronous grouting uses mainly has fine coal
Ash, sand and water etc..Each ground local product manages mechanical index such as the following table 1, the slurry material proportioning such as the following table 2 of synchronous grouting along the line
(1m3)。
Each ground local product manages mechanical index along table 1
2 slurry material of table matches
| Material | Sand | Flyash | Bentonite | Cement | Additive | Water |
| Weight | 800kg | 380kg | 80kg | 80kg | 3.0kg | 380kg |
According to stratum monitoring data, the proportioning of slurry material is adjusted in due course, using optimal slurries are matched, increases stratum
Cohesive strength and internal friction angle, to improve stratum adhesion strength and compactness, to have the function that reinforcing.
In step (3), it is both provided with pressure sensor on grouting at the tail of the shield machine pipe, convenient for monitoring grouting pressure in real time, in conjunction with
Grouting pressure and stratum monitoring data preferably control slip casting process, if grouting pressure is excessive, it will cause running pulp even shield pipes
Piece is damaged, if grouting pressure deficiency it will cause grouting amounts few, structure void insufficient fill, so as to cause ground deformation and shield
Section of jurisdiction deviates.
Grouting amount is the 130%~180% of theoretical structure void, and extra large Rake earth pressure balanced shield, EPBS is about per ring grouting amount
5.46~7.56m3, Kawasaki earth pressure balanced shield, EPBS are about 5.59~7.74m3 per ring grouting amount, and grouting pressure is balancing earth pressure power
1.5 times, specific mud jacking amount and mud jacking point optimize, slurry consistency one depending on pressure value and stratum deformation monitoring data when mud jacking
As be 9~12.
Shield duct piece arrangement of reinforcement is suitably reinforced, and adds reserved injected hole, so as in the construction process according to dynamic monitoring
Situation supplements slip casting, and every 5~8 rings, pressure injection dual slurry forms hoop around tunnel when necessary, and tunnel is made to be longitudinally formed interruption
Sealing isolation strip.
This section tunnel soil body whole process is reinforced using tracking two fluid grouting.
Surface grout injection measure is taken when necessary in this section tunnel.
In step (4), since grouting pressure and the static lateral pressure coefficient and tunnel top buried depth on stratum are linearly related, note
Slurry amount is also related to the infiltration coefficient on stratum, so, during shield crossing construction of railways, it is necessary to monitor number in conjunction with dynamic stratum
According to data, control slip casting is carried out, and injection phase of the fltting speed of shield machine, slurries etc. can also influence grouting quality,
To accomplish in entire work progress timely, uniform, enough, it is ensured that its structure void is able to timely and enough filling, by ground
Minimum is arrived in deformation and section of jurisdiction offset control.
The present invention implementation process be:First according to stratum monitoring data, automatic blending system configures optimal slurries, so
The slurries configured are delivered to by slurry feeding pump the slurry storage tank of shield machine afterwards, are further delivered to grouting at the tail of the shield machine pipe,
The pressure value of detection is transmitted to control system, system combination dynamic stratum monitoring data by the pressure sensor in Grouting Pipe in real time
Shield tail structure void synchronous grouting is carried out, feedback data is monitored according to earth's surface, adopts an effective measure controlled in time, to slurries
Proportioning is adjusted, and assigns special messenger to be responsible in construction, detailed record, and base area are carried out to pushed position, intrusion, pressure value
Layer deformation monitor information adjusts in time, it is ensured that the construction quality of mud jacking process, synchronous grouting are monitored further according to dynamic stratum later
Data carry out secondary grouting, when secondary grouting, are made detailed records to pushed position, intrusion, pressure value, and become according to stratum
Shape monitoring information adjusts in time, it is ensured that the construction quality of mud jacking process.According to the deformation monitoring situation in construction, adjustment at any time is noted
Slurry amount and grouting parameter, secondary grouting adjust at any time according to ground monitoring situation, to make stratum deformation amount minimize, until
Until ground deformation is stablized, to ensure the safety of railroad track.
The beneficial effects of the invention are as follows:It is reinforced using tracking two fluid grouting, intensity is high, is not easy to isolate, according to dynamic stratum
Synchronous grouting is combined by monitoring data with secondary grouting, can not only meet the needs of Different Strata situation, but also ground becomes
Shape amount and section of jurisdiction offset are small, and grouting quality is good, safe.
The embodiments of the present invention have been described in detail above, but content is only presently preferred embodiments of the present invention, cannot
It is believed to be used to limit the scope of the invention.Any changes and modifications in accordance with the scope of the present application, should all
Still fall within the scope of the patent of the present invention.
Claims (5)
1. a kind of shield synchronization slip casting and secondary grouting technique, include the following steps:
(1) slurries are configured according to stratum monitoring data automatic blending system;
(2) slurries configured are delivered to the slurry storage tank of shield machine;
(3) slurries in the slurry storage tank are delivered to grouting at the tail of the shield machine pipe;
(4) shield tail structure void synchronous grouting is carried out according to dynamic stratum monitoring data;And
(5) secondary grouting is carried out according to dynamic stratum monitoring data.
2. shield synchronization slip casting according to claim 1 and secondary grouting technique, it is characterised in that:In the step (1)
In, feedback data is monitored according to stratum, the grout coordinate ratio is adjusted, to obtain the slurries for adapting to stratum condition, wherein
The material of slurries used by synchronous grouting includes flyash, Sha Heshui.
3. shield synchronization slip casting according to claim 1 and secondary grouting technique, it is characterised in that:In the step (3)
In, it is provided with pressure sensor on the grouting at the tail of the shield machine pipe.
4. shield synchronization slip casting according to claim 1 and secondary grouting technique, it is characterised in that:Grouting amount is built for theory
The 130%~180% of gap is built, the every ring grouting amount of extra large Rake earth pressure balanced shield, EPBS is about 5.46~7.56m3, and Kawasaki soil pressure is flat
Weighing apparatus shield is about 5.59~7.74m3 per ring grouting amount, and grouting pressure is 1.5 times of balancing earth pressure power, specific mud jacking amount and mud jacking
Point optimizes depending on pressure value and stratum deformation monitoring data when mud jacking, and slurry consistency is 9~12.
5. shield synchronization slip casting according to claim 1 and secondary grouting technique, it is characterised in that:By shield duct piece arrangement of reinforcement
Reinforce, and add reserved injected hole, to supplement slip casting according to dynamic monitoring situation in the construction process, and exists every 5~8 rings
Pressure injection dual slurry forms hoop around tunnel, and tunnel is made to be longitudinally formed intermittent sealing isolation strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710216241.3A CN108691556B (en) | 2017-04-05 | 2017-04-05 | Shield synchronous grouting and secondary grouting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710216241.3A CN108691556B (en) | 2017-04-05 | 2017-04-05 | Shield synchronous grouting and secondary grouting process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108691556A true CN108691556A (en) | 2018-10-23 |
| CN108691556B CN108691556B (en) | 2020-11-03 |
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ID=63842553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710216241.3A Active CN108691556B (en) | 2017-04-05 | 2017-04-05 | Shield synchronous grouting and secondary grouting process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159307A (en) * | 2019-05-16 | 2019-08-23 | 北京市政建设集团有限责任公司 | A kind of tunnel multilayer grouting process |
| CN110454194A (en) * | 2019-08-06 | 2019-11-15 | 中广核工程有限公司 | Shield-tunneling construction secondary grouting method |
| CN111779494A (en) * | 2020-07-29 | 2020-10-16 | 中建八局轨道交通建设有限公司 | Grouting method for controlling upward floating of duct piece in shield construction |
| CN112901178A (en) * | 2021-01-18 | 2021-06-04 | 中铁上海工程局集团第五工程有限公司 | Thixotropic slurry anti-drag grouting system and grouting method for medium-long distance oversized-diameter jacking pipe |
| CN114961790A (en) * | 2022-05-27 | 2022-08-30 | 中南大学 | Shield synchronous grouting construction method and construction effect evaluation method thereof |
| CN115030733A (en) * | 2022-06-17 | 2022-09-09 | 中建三局第三建设工程有限责任公司 | Grouting method for preventing stratum soil loss or ground surface settlement |
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| CN103174439A (en) * | 2013-04-11 | 2013-06-26 | 上海隧道工程股份有限公司 | Construction method for shield tunnel slow condensing type synchronous grouting |
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| CN104847364A (en) * | 2015-05-18 | 2015-08-19 | 中建交通建设集团有限公司 | Construction method of shield and continuous cutting pile foundation for penetrating through residential building group |
| CN105257276A (en) * | 2015-11-18 | 2016-01-20 | 中国华冶科工集团有限公司 | Grouting monitoring system and monitoring method thereof |
| CN106121662A (en) * | 2016-05-06 | 2016-11-16 | 同济大学 | Backbreak region synchronous grouting dynamic compensation of shield digging local fills control method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103174439A (en) * | 2013-04-11 | 2013-06-26 | 上海隧道工程股份有限公司 | Construction method for shield tunnel slow condensing type synchronous grouting |
| CN203960850U (en) * | 2013-11-18 | 2014-11-26 | 北京建工土木工程有限公司 | A kind of rich pigment fine sand stratum mobilism filling system |
| CN104847364A (en) * | 2015-05-18 | 2015-08-19 | 中建交通建设集团有限公司 | Construction method of shield and continuous cutting pile foundation for penetrating through residential building group |
| CN105257276A (en) * | 2015-11-18 | 2016-01-20 | 中国华冶科工集团有限公司 | Grouting monitoring system and monitoring method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159307A (en) * | 2019-05-16 | 2019-08-23 | 北京市政建设集团有限责任公司 | A kind of tunnel multilayer grouting process |
| CN110454194A (en) * | 2019-08-06 | 2019-11-15 | 中广核工程有限公司 | Shield-tunneling construction secondary grouting method |
| CN111779494A (en) * | 2020-07-29 | 2020-10-16 | 中建八局轨道交通建设有限公司 | Grouting method for controlling upward floating of duct piece in shield construction |
| CN111779494B (en) * | 2020-07-29 | 2022-07-12 | 中建八局轨道交通建设有限公司 | Grouting method for controlling upward floating of duct piece in shield construction |
| CN112901178A (en) * | 2021-01-18 | 2021-06-04 | 中铁上海工程局集团第五工程有限公司 | Thixotropic slurry anti-drag grouting system and grouting method for medium-long distance oversized-diameter jacking pipe |
| CN112901178B (en) * | 2021-01-18 | 2023-03-24 | 中铁上海工程局集团第五工程有限公司 | Thixotropic slurry anti-drag grouting system and grouting method for medium-long distance oversized-diameter jacking pipe |
| CN114961790A (en) * | 2022-05-27 | 2022-08-30 | 中南大学 | Shield synchronous grouting construction method and construction effect evaluation method thereof |
| CN115030733A (en) * | 2022-06-17 | 2022-09-09 | 中建三局第三建设工程有限责任公司 | Grouting method for preventing stratum soil loss or ground surface settlement |
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| CN108691556B (en) | 2020-11-03 |
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