CN109026040A - A kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS - Google Patents
A kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS Download PDFInfo
- Publication number
- CN109026040A CN109026040A CN201810880413.1A CN201810880413A CN109026040A CN 109026040 A CN109026040 A CN 109026040A CN 201810880413 A CN201810880413 A CN 201810880413A CN 109026040 A CN109026040 A CN 109026040A
- Authority
- CN
- China
- Prior art keywords
- foam
- sediment improvement
- valve
- pipeline
- epbs
- 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
- 230000006872 improvement Effects 0.000 title claims abstract description 55
- 239000013049 sediment Substances 0.000 title claims abstract description 54
- 239000000463 material Substances 0.000 title claims abstract description 25
- 239000006260 foam Substances 0.000 claims abstract description 64
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000002347 injection Methods 0.000 claims abstract description 9
- 239000007924 injection Substances 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000010276 construction Methods 0.000 description 6
- 229910000278 bentonite Inorganic materials 0.000 description 5
- 239000000440 bentonite Substances 0.000 description 5
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
- E21D9/0664—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end with means for applying a coating layer to the front face, e.g. by spraying
-
- 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
-
- 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
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
- E21D9/0678—Adding additives, e.g. chemical compositions, to the slurry or the cuttings
- E21D9/0685—Foaming agents
-
- 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
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
Abstract
A kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS utmostly reduces tool wear, mud lining, the probability gushed to effectively improve sediment improvement speed.Liquid reserve tank including foam dope holding vessel and for storing the second sediment improvement agent.The foam dope holding vessel connects mixing tank by foam dope transfer pipeline, and mixing tank is connected with a plurality of foam pipeline road, and each foam pipeline road accesses corresponding foam and pipeline occurs after being connected with corresponding means for high-pressure gas pipeline.Liquid reserve tank is connected with a plurality of second sediment improvement agent transfer pipeline, each second sediment improvement agent transfer pipeline is connected with the end that pipeline occurs for corresponding foam, foam is mixed with the second sediment improvement agent, it is connected to the spout in front of cutterhead through injection line, Direct Uniform is ejected into front of cutterhead on face.
Description
Technical field
The present invention relates to earth pressure balanced shield, EPBS construction, in particular to a kind of synchronization bi-material layers slag for earth pressure balanced shield, EPBS
The good system of land reform.
Background technique
Shield method is widely used in major city underground by its advantage such as safe and reliable, quick, economic, environmentally friendly.Soil pressure
Balance shield is increasingly being applied to urban subway tunnel construction.Earth pressure balanced shield, EPBS sediment improvement occupies in shield-tunneling construction
Highly important status.Present sediment improvement material mainly has foam, bentonite slurry, aqueous solutions of polymers and water.Soil now
Flatten weighing apparatus shield-tunneling construction in, only be unable to reach shield with a kind of sediment improvement material needed for stream plasticity, low internal friction angle and
The dregs state of low permeability generally uses two kinds of sediment improvement materials.If cobble stratum is using foam and bentonite mud
Slurry carries out sediment improvement, and mudstone stratum carries out sediment improvement using foam and water, and the big stratum of water uses foam and polymer water
Solution carries out sediment improvement etc..
When being improved using two kinds of sediment improvement materials, way generally used now is that two kinds of material systems generally separate cloth
It sets, is used alone.A kind of way is in front of cutterhead using foam, in soil cabin plus water or bentonite slurry；Another way is knife
A part of pipeline injected foam, another part pipeline add water or bentonite slurry etc. in front of disk.Two kinds of materials are to sediment improvement
Advantage cannot work in front of the cutterhead in cutting process simultaneously, cause the dregs in front of cutterhead that can not reach required dregs as early as possible
State, and then there is phenomena such as tool wear aggravation, dregs stirring is uneven, is easy mud lining, gushs.Shield-tunneling construction person is always
Injection phase, the quantity of different sediment improvement agent are studied, but problem can not be avoided the occurrence of completely.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of synchronization bi-material layers dregs for earth pressure balanced shield, EPBS to change
Good system utmostly reduces tool wear, mud lining, the probability gushed to effectively improve sediment improvement speed.
The technical solution adopted by the present invention to solve the technical problems is as follows:
A kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS of the invention, including foam dope storage
Tank and liquid reserve tank for storing the second sediment improvement agent, it is characterized in that: the foam dope holding vessel is defeated by foam dope
Piping connection mixing tank is sent, mixing tank is connected with a plurality of foam pipeline road, each foam pipeline road and corresponding high pressure gas
Body transfer pipeline accesses corresponding foam and pipeline occurs after being connected；The liquid reserve tank and a plurality of second sediment improvement agent delivery pipe
Road is connected, and each second sediment improvement agent transfer pipeline is connected with the end that pipeline occurs for corresponding foam, foam and second
Sediment improvement agent mixing is connected to the spout in front of cutterhead through injection line, and Direct Uniform is ejected into front of cutterhead on face.
The beneficial effects of the invention are as follows bi-material layers sediment improvement agent is constituted by foam, the second sediment improvement agent mixing, directly
It is uniformly ejected into front of cutterhead on face, synchronization is contacted and improved with the dregs cut, can effectively improve dregs
The speed of improvement utmostly reduces tool wear, mud lining or the probability gushed；Shield-tunneling construction progress can be effectively improved, is dropped
Low project cost.
Detailed description of the invention
This specification includes such as next width attached drawing:
Fig. 1 is a kind of schematic diagram of the synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS of the present invention.
Component and corresponding label: foam dope holding vessel 1, the first shut-off valve 2, liquid level sensor 3, first are shown in figure
Frequency conversion screw pumps the 4, first safety overflow valve 5, the first check valve 6, first flow sensor 7, the first motor switch 8, mixing tank
9, the second shut-off valve 10, the second frequency conversion screw pump the 11, second safety overflow valve 12, second one-way valve 13, third shut-off valve 14, the
Two flow sensors 15, first pressure gauge 16, foam maker 17, foam check window 18, pressure sensor 19, third check valve
20, the 4th shut-off valve 21, the 5th shut-off valve 22, the first air gauge 23, condenser 24, pressure reducer 25, the second air gauge 26, third
Flow sensor 27, the second motor switch 28, third air gauge 29, the 4th check valve 30, the 6th shut-off valve 31, liquid reserve tank 32,
7th shut-off valve 33, third frequency conversion screw pump the 34, the 4th flow sensor 35, second pressure gauge 36, the 5th check valve the 37, the 8th
Shut-off valve 38.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Referring to Fig.1, a kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS of the invention includes foam
Stoste holding vessel 1 and liquid reserve tank 32 for storing the second sediment improvement agent.The foam dope holding vessel 1 passes through foam dope
Transfer pipeline connects mixing tank 9, and mixing tank 9 is connected with a plurality of foam pipeline road, each foam pipeline road and corresponding height
Pressure gas transfer pipeline accesses corresponding foam after being connected and pipeline occurs.The liquid reserve tank 32 and a plurality of second sediment improvement agent
Transfer pipeline is connected, and each second sediment improvement agent transfer pipeline is connected with the end that pipeline occurs for corresponding foam, foam
It is mixed with the second sediment improvement agent, is connected to the spout in front of cutterhead through injection line, Direct Uniform is ejected into the palm in front of cutterhead
On sub- face.Synchronization is contacted and is improved with the dregs cut, can be effectively improved the speed of sediment improvement, utmostly be dropped
Low tool wear, mud lining or the probability gushed.
Referring to Fig.1, the first shut-off valve 2, the first safety overflow valve 5 and are sequentially set on the foam dope transfer pipeline
One check valve 6, in 5 both ends parallel connection liquid level sensor 3 of the first safety overflow valve and the first frequency conversion screw pump 4, the first frequency conversion screw
4 connection first flow sensor 7 of pump and the first motor switch 8.Foam pipeline road sequence second frequency conversion screw of setting
Pump 11, second one-way valve 13, third shut-off valve 14, second flow sensor 15 and first pressure gauge 16, the second frequency conversion screw pump
11 is in parallel with the second safety overflow valve 12.
Referring to Fig.1, be sequentially arranged in the high pressure gas delivery pipe third flow sensor 27, the second motor switch 28,
Third air gauge 29, the 4th check valve 30 and the 6th shut-off valve 31, the front end parallel connection of each high pressure gas delivery pipe are accessed by the 5th section
The only preceding pipeline that valve 22, the first air gauge 23, condenser 24, pressure reducer 25 and the second air gauge 26 are constituted.
Referring to Fig.1, the foam generator tube road sequence setting foam maker 17, foam check window 18, pressure sensing
Device 19, third check valve 20 and the 4th shut-off valve 21.7th cut-off is sequentially set on the second sediment improvement agent transfer pipeline
Valve 33, third frequency conversion screw pump the 34, the 4th flow sensor 35, second pressure gauge 36, the 5th check valve 37 and the 8th shut-off valve
38.The injection line is connected to the spout in front of cutterhead by rotary joint.
A kind of course of work of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS of the invention is as follows:
1. foam dope holding vessel 1 stores foaming agent before sediment improvement starting, liquid reserve tank 32 stores another second of dregs and changes
Good dose (bentonite slurry, aqueous solutions of polymers or water etc.).
2. when the cutterhead rotary cutting soil body, starting foaming system, according to each parameter of the foaming system inputted, foam and water
Mixed liquor through mixing tank 9, the second shut-off valve 10, the second frequency conversion screw pump 11, second one-way valve 13, third shut-off valve 14, the
Two flow sensors 15, first pressure gauge 16 enter foam maker 17.High pressure gas is through the 5th shut-off valve 22, the first air gauge
23, condenser 24, pressure reducer 25, the second air gauge 26, third flow sensor 27, the second motor switch 28, third air gauge
29, the 4th check valve 30, the 6th shut-off valve 31 enter foam maker 17.Foam and water mixed liquid, high pressure gas are sent out in foam
The raw interaction of device 17 forms foam, checks window 18, pressure sensor 19, third check valve 20 and the second sediment improvement through foam
Agent mixing.When second frequency conversion screw pumps 11 pressure more than limiting design value, the second safety overflow valve 12 is opened, flows back.System work
In the process, it is compared according to the flow of second flow sensor 15 and design discharge, the second frequency conversion screw of program adjust automatically pump 11
Rate of pumping, reach almost the same with design discharge.It is compared according to the flow of third flow sensor 27 and design discharge, journey
The open degree of the second motor switch of sequence adjust automatically 28, reaches consistent with design discharge.
When mixing tank 9 is without mixed liquor, the first motor switch 8 is opened, and high pressure water is through the 7, first electricity of first flow sensor
Dynamic switch 8 is mixed with foam dope.The first frequency conversion screw pump 4 is started according to 7 flow of first flow sensor simultaneously, foaming agent is former
Liquid pumps the 4, first check valve 6 and high pressure through foam dope holding vessel 1, the first shut-off valve 2, liquid level sensor 3, the first frequency conversion screw
Water phase is mixed into mixing tank 9.When the first frequency conversion screw, which pumps 4 pressure, is more than limiting design value, the first safety overflow valve 5 opening,
Reflux.
3. when the cutterhead rotary cutting soil body, starting third frequency conversion screw pump 34, the second sediment improvement agent is through liquid reserve tank 32, the
Seven shut-off valves 33, third frequency conversion screw pump the 34, the 4th flow sensor 35, the second atmospheric pressure table 26, the 5th check valve the 37, the 8th
Shut-off valve 38 is mixed with foam.It, can be with appropriate adjustment third frequency conversion screw according to the flow that the 4th flow sensor 35 is fed back
The rate of pumping of pump 34, reaches required injection rate.
4) foam is mixed with the second sediment improvement agent, and through spout on rotary joint, pipeline, cutterhead, a point multichannel is directly sprayed
It is mapped to and excavates on face, carry out comprehensive sediment improvement.According to different geological conditions, second of sediment improvement agent is selected.
5) according to different geological conditions, required different injection rate, in synchronous bi-material layers sediment improvement injected system
Ability, the size of equipment, pipeline etc. are accordingly designed, are configured.
The above is a kind of synchronization bi-material layers sediment improvement for earth pressure balanced shield, EPBS of the present invention that explains through diagrams
Some principles of system are not intended to for the present invention being confined in shown and described specific structure and the scope of application, therefore all
All corresponding modifications that may be utilized and equivalent, belong to the applied the scope of the patents of the present invention.
Claims (7)
1. a kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS, including foam dope holding vessel (1) and use
In the liquid reserve tank (32) for storing the second sediment improvement agent, it is characterized in that: the foam dope holding vessel (1) is defeated by foam dope
Send piping connection mixing tank (9), mixing tank (9) is connected with a plurality of foam pipeline road, each foam pipeline road with it is corresponding
Means for high-pressure gas pipeline accesses corresponding foam and pipeline occurs after being connected；The liquid reserve tank (32) changes with a plurality of second dregs
Good dose of transfer pipeline is connected, and each second sediment improvement agent transfer pipeline is connected with the end that pipeline occurs for corresponding foam,
Foam is mixed with the second sediment improvement agent, the spout in front of cutterhead is connected to through injection line, before Direct Uniform is ejected into cutterhead
On square face.
2. a kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS as described in claim 1, it is characterized in that:
First shut-off valve (2), the first safety overflow valve (5) and the first check valve (6) are sequentially set on the foam dope transfer pipeline,
In the first safety overflow valve (5) both ends parallel connection liquid level sensor (3) and the first frequency conversion screw pump (4), the first frequency conversion screw pumps (4)
Connect first flow sensor (7) and the first motor switch (8).
3. a kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS as described in claim 1, it is characterized in that:
Foam pipeline road sequence the second frequency conversion screw of setting pumps (11), second one-way valve (13), third shut-off valve (14), the
Two flow sensors (15) and first pressure gauge (16), it is in parallel with the second safety overflow valve (12) that the second frequency conversion screw pumps (11).
4. a kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS as described in claim 1, it is characterized in that:
Third flow sensor (27), the second motor switch (28), third air gauge are sequentially set in the high pressure gas delivery pipe
(29), the 4th check valve (30) and the 6th shut-off valve (31), the front end parallel connection of each high pressure gas delivery pipe are accessed by the 5th shut-off valve
(22), the preceding pipeline that the first air gauge (23), condenser (24), pressure reducer (25) and the second air gauge (26) are constituted.
5. a kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS as described in claim 1, it is characterized in that:
Foam generator tube road sequence setting foam maker (17), foam check window (18), pressure sensor (19), third list
To valve (20) and the 4th shut-off valve (21).
6. a kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS as described in claim 1, it is characterized in that:
7th shut-off valve (33), third frequency conversion screw pump (34), the 4th stream are sequentially set on the second sediment improvement agent transfer pipeline
Quantity sensor (35), second pressure gauge (36), the 5th check valve (37) and the 8th shut-off valve (38).
7. a kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS as described in claim 1, it is characterized in that:
The injection line is connected to the spout in front of cutterhead by rotary joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810880413.1A CN109026040A (en) | 2018-08-03 | 2018-08-03 | A kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810880413.1A CN109026040A (en) | 2018-08-03 | 2018-08-03 | A kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109026040A true CN109026040A (en) | 2018-12-18 |
Family
ID=64649487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810880413.1A Pending CN109026040A (en) | 2018-08-03 | 2018-08-03 | A kind of synchronization bi-material layers sediment improvement system for earth pressure balanced shield, EPBS |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109026040A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113105897A (en) * | 2021-04-02 | 2021-07-13 | 中电建铁路建设投资集团有限公司 | Universal muck modifier for earth pressure balance shield and muck modification method |
| CN114033395A (en) * | 2021-10-28 | 2022-02-11 | 中交第二航务工程局有限公司 | Mud cake preventing device and method for earth pressure balance type shield machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113105897A (en) * | 2021-04-02 | 2021-07-13 | 中电建铁路建设投资集团有限公司 | Universal muck modifier for earth pressure balance shield and muck modification method |
| CN114033395A (en) * | 2021-10-28 | 2022-02-11 | 中交第二航务工程局有限公司 | Mud cake preventing device and method for earth pressure balance type shield machine |
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