CN109403997A - Earth pressure balanced shield, EPBS warehouse entry construction method - Google Patents
Earth pressure balanced shield, EPBS warehouse entry construction method Download PDFInfo
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- CN109403997A CN109403997A CN201811454632.XA CN201811454632A CN109403997A CN 109403997 A CN109403997 A CN 109403997A CN 201811454632 A CN201811454632 A CN 201811454632A CN 109403997 A CN109403997 A CN 109403997A
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- 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
- E21D9/087—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 with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
- E21D9/0873—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 with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines the shield being provided with devices for lining the tunnel, e.g. shuttering
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- 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
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- 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
-
- 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- 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
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/124—Helical conveying means therefor
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention provides a kind of earth pressure balanced shield, EPBS warehouse entry construction method, includes the following steps: the first injection slurry for preparing grouting and the second injection slurry；The viscosity of first injection slurry is less than the viscosity of second injection slurry；Pressure injection sealing is starched to form seal ring on the outside of shield duct piece, and pressure injection sealing slurry forms sealant at shield tail on the outside of shield machine body；The dregs in native storehouse is replaced with the first injection slurry, native storehouse internal pressure is monitored, and native storehouse internal pressure is improved into 0.1bar from initial value；The first injection slurry in the native storehouse is replaced with the second injection slurry, native storehouse internal pressure is monitored, and native storehouse internal pressure is improved into 0.2bar from initial value；After pressure stabilizing, rotating cutter-head makes the gap between the second injection slurry filling cutter head of shield machine and face form stable mud film.The present invention not only ensure that the stabilization of face, and be able to satisfy the security needs for the operation that opens a position with the Water And Earth Pressures at the method balance face rear held one's breath.
Description
Technical field
The invention belongs to Tunnel Engineering technical field more particularly to a kind of earth pressure balanced shield, EPBS warehouse entry construction methods.
Background technique
In rich water compound stratum tunneling construction, tool wear is inevitable balancing earth-pressure shielding machine, the knife of hobboing cutter
Circle eccentric wear, cutter ring fall off, crackle, loosening, displacement and phenomena such as mud lining, and being required to open a position is checked and replaced cutter.
It is with pressure in meeting stratum to open a position because there are the risks of pressure unstability for stratum cranny development, it may cause face unstability, ground
It collapses, jeopardize the serious consequences such as human life's safety.
Summary of the invention
In view of this, it is necessary to provide a kind of earth pressure balanced shield, EPBS warehouse entry construction methods to solve the above problem.
A kind of earth pressure balanced shield, EPBS warehouse entry construction method includes the following steps: the first injection slurry for preparing grouting and
Two injection slurries, the viscosity of first injection slurry are less than the viscosity of second injection slurry；After shield machine stops driving, in shield
Pressure injection sealing is starched to form seal ring on the outside of section of jurisdiction；Pressure injection sealing slurry forms sealing at shield tail on the outside of the shield machine body
Layer；The dregs in native storehouse is replaced with first injection slurry, and in replacement process, the native storehouse internal pressure is monitored, and
The native storehouse internal pressure is improved into 0.1bar from initial value；Described first in the native storehouse is replaced with second injection slurry
Injection slurry in replacement process, is monitored the native storehouse internal pressure, and native storehouse internal pressure is improved from initial value
0.2bar；After pressure stabilizing, rotating cutter-head forms the gap between the second injection slurry filling cutter head of shield machine and face surely
Fixed mud film.
The viscosity of first injection slurry is 65 ± 5Pas in one of the embodiments, second injection slurry
Viscosity is 95 ± 5Pas.
The sealing slurry includes the first component and the second component that volume ratio is 1:1 in one of the embodiments, described
First component is mixed by cement and water according to the mass ratio of 1:1, and second component is by waterglass and water according to the body of 1:2
Product ratio mixes.
The sealing slurry is mixed by HS-2 type pulping agent, sodium bentonite and water in one of the embodiments, institute
The mass ratio for stating HS-2 type pulping agent, sodium bentonite and water is 1:6:20.
After shield machine stops driving in one of the embodiments, grouting system send sealing slurry to the shield
The outside of section of jurisdiction, and the sealing slurry is injected in section of jurisdiction injected hole, form seal ring；Shield duct piece position described in pressure injection is shield tail
4-6 ring afterwards, pressure injection sequence are the symmetrical waist-top in bottom-of the shield duct piece.
It is sealed in one of the embodiments, using the grouting system to described in pressure injection on the outside of the shield machine body
Slurry, to seal the gap between shield machine body and stratum and between body and the shield duct piece；Pressure injection sequence is described
Symmetrical waist-the top in the bottom-of shield machine body.
First the part dregs in the native storehouse is discharged using screw conveyor in one of the embodiments, is then adopted
With grouting pipeline by the first injection slurry injection native storehouse, recycle according to this, until the dregs in the native storehouse is complete
Portion is replaced by first injection slurry, and in entire replacement process, soil storehouse internal pressure is not less than the initial value.
The dregs displacement in the native storehouse is completed in one of the embodiments, and the native storehouse internal pressure is stablized
After a period of time, cutterhead turns an angle, part first injection slurry in the soil storehouse by pressure injection to face, when
When the soil storehouse internal pressure decline, first injection slurry is injected into the native storehouse using the grouting system, until institute
It states until native storehouse internal pressure stabilizes to the initial value+0.1bar.
First injection slurry in the native storehouse is discharged using the screw conveyor in one of the embodiments,
Second injection slurry, the discharge of first injection slurry and described second are injected into the native storehouse using the grouting pipeline
The injection of injection slurry is synchronous to be carried out, and is replaced into second slip casting until first injection slurry in the native storehouse is all
Liquid, in entire replacement process, soil storehouse internal pressure is not less than the initial value.
Second note is replaced into when first injection slurry in the native storehouse is all in one of the embodiments,
After slurries, the cutterhead is slowly rotated at interval of certain time, and part first injection slurry in the soil storehouse is arrived by pressure injection
On face, one layer of stable mud film is ultimately formed；When the native storehouse internal pressure decline, using the grouting system to institute
It states and injects second injection slurry in native storehouse, until the native storehouse internal pressure stabilizes to the initial value+0.2bar.
Earth pressure balanced shield, EPBS warehouse entry construction method of the invention first passes through the injection sealing on the outside of shield duct piece and starches to be formed only
Water ring prevents underground water from penetrating into shield machine along shield duct piece external series gap；Then pressure injection sealing is starched in shield on the outside of shield machine body
Sealant is formed at tail, prevents the gas in native storehouse from passing through the gap between shield machine body and shield duct piece to shield tail and tunnel
Interior loss.Then it to by replacing the first injection slurry, the second injection slurry, and rotating cutter-head in native storehouse, is formed on face
One layer of stable mud film.The present invention not only ensure that face with the Water And Earth Pressures at the method balance face rear held one's breath
Stablize, and is able to satisfy the security needs for the operation that opens a position；The displacement of the first injection slurry and the displacement of the second injection slurry are carried out later,
Native storehouse air pressure balance is established, the required standard that opens a position is reached.
Detailed description of the invention
Fig. 1 is a kind of flow chart of earth pressure balanced shield, EPBS warehouse entry construction method provided by the invention.
State reference map when Fig. 2 is face mud film provided by the invention formation.
Main element symbol description
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
Below in conjunction with the attached drawing in embodiment of the present invention, the technical solution in embodiment of the present invention is carried out clear
Chu is fully described by, it is clear that described embodiment is only some embodiments of the invention, rather than whole realities
Apply mode.Based on the embodiment in the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.When an element is considered as " being set to " another element, it
It can be and be set up directly on another element or may be simultaneously present centering elements.Term as used herein is " vertical
", " horizontal ", "left", "right" and similar statement for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
The present invention provides a kind of earth pressure balanced shield, EPBS warehouse entry construction methods, especially apply and exist in balancing earth-pressure shielding machine
During rich water composite bottom layer tunneling construction, cutter ring eccentric wear, the cutter ring of hobboing cutter fall off, crackle, loosening, displacement and mud lining
Deng the situation of need to open a position inspection inspection and replacement cutter.
Specifically, Fig. 1 and Fig. 2 are please referred to.Shield machine in the present embodiment include cutterhead 12, native storehouse 13, shield duct piece 14,
Screw conveyor 15, bentonite tank 16 and grouting pipeline 18.Shield machine is located at the tunneling in stratum 400.Cutterhead 12 is located at
11 before the shield of shield machine, it to be used for tunneling.The working face that cutterhead 12 is in contact with stratum 400 is face 410, also cries cutting
Face.Native storehouse 13 is located in shield machine and is located at 11 before shield, and native storehouse 13 is used to accommodate the dregs of the excavation of cutterhead 12.Shield duct piece 14
For sheet, multiple shield duct pieces 14 constitute tubular structure and are supported in the tunnel excavated.Screw conveyor 15 is located at shield
It is connected in structure machine and with native storehouse 13, screw conveyor 15 is used for the dregs being discharged in native storehouse 13.Bentonite tank 16 is a container,
In tunnel and for accommodating bentonite or other slurries.Grouting pipeline 18 is for conveying water or slurries, grouting pipeline 18 1
End is connected with bentonite tank, and the other end is connected with Tu Cang, and in the present embodiment, grouting pipeline 18 is connect with grouting pump.
Referring to Fig. 1, earth pressure balance shield construction method of the invention includes the following steps.
Step S101 prepares the first injection slurry and the second injection slurry of grouting.
Specifically, the first injection slurry and the second injection slurry are prepared on the ground, and the viscosity of the first injection slurry is less than the second note
The viscosity of slurries.
In 60-70Pas, the first injection slurry has certain mobility for the viscosity control of first injection slurry, can be effective
It penetrates into stratum, and is suitble to long-distance pumping, meet the requirement of shield-tunneling construction.
The viscosity of second injection slurry is controlled in 90-100Pas, and the viscosity of the second injection slurry is larger, can fill earth bore
Gap, and can solidify before the deadline, before curing not by the dilution of underground water；And it is formed before face 410 high-quality
The mud film of amount.
In the present embodiment, by weight, the first injection slurry each component and content are 1000 parts of water, 100 parts of swellings
Soil, 40 parts of HS-1 type pulping agents, 10 parts of HS-2 type pulping agents, 100 parts of HS-3 type pulping agents, 2 parts of sodium carbonate, 1 part of thickener.The
The viscosity of one injection slurry is 70Pas, can effectively be penetrated into stratum 400, and 400 hole of stratum is filled.
In the present embodiment, by weight, the second injection slurry each component and content are 1000 parts of water, 150 parts of swellings
Soil, 130 parts of HS-1 type pulping agents, 85 parts of HS-2 type pulping agents, 150 parts of HS-3 type pulping agents, 3 parts of sodium carbonate, 2 parts of thickeners.
The viscosity of second injection slurry is 93Pas, can effectively be penetrated into stratum 400, and 400 hole of stratum is filled, for a long time
Substantially without isolation after static, and mud film 500 is formed before face 410.
HS-1 type pulping agent, HS-2 type pulping agent, HS-3 type pulping agent are commercially available shield Special pulping agent.The shield is special
It is produced by clay mineral and organic high molecular polymer through complicated technology with pulping agent, it can be according to different construction geology shapes
Condition effectively generates flotation effect with the beneficial particle in the soil under cutting；It is established in rotary jet strengthening or stirring stabilization zone good
Good Slurry.Make muddy water that there is good rheological characteristic and dispersing uniformity；Prevent because of the excessive generation roof fall accident of pressure and
Surface subsidence；Conveying energy consumption can be reduced, prevents from causing plugging, anti-salt, calcium corrode；Reduce the abrasion of cutter and muddy water pipeline.
And there is good lubrication protection effect.
Step S102 starches to form seal ring 200 after shield machine stops driving in 14 outside pressure injection sealing of shield duct piece.
Specifically, first ground mixing sealing starch, the sealing slurry include cement grout and waterglass slurries, cement grout by
Cement and water are mixed according to the mass ratio of 1:1, waterglass slurries by waterglass and water according to the volume ratio mixing of 1:2 and
At；Cement grout and waterglass slurries are mixed according to the volume ratio of 1:1.Before use, scene carries out cement slurry-waterglass
Sampling test, to ensure presetting period control in 35-45s.
Then shield machine being selected to shut down in setting position, grouting system send sealing slurry to the outside of shield duct piece 14,
And in section of jurisdiction injected hole injection sealing slurry, seal ring 200 is formed, to prevent underground water from penetrating into shield along shield duct piece external series gap；
14 position of pressure injection shield duct piece is 4-6 ring after shield tail 17, and pressure injection sequence is the symmetrical waist-top in bottom-of shield duct piece 14.Note
Pressure control is starched in 0.5-1.0MPa.Pressure stabilizing stopped slip casting after 1 minute.
In the present embodiment, the sealing slurry solidification plugging in grouting system in order to prevent, can be added 2m in sealing is starched3
Common bentonite slurry, the density of the bentonite slurry are 300kg/m3。
Step S103, pressure injection sealing slurry forms sealant 300 at shield tail 17 on the outside of shield machine body.
Specifically, the gas in order to prevent in native storehouse 13 passes through the gap between shield machine body and shield duct piece 14 to shield
Loss in tail 17 and tunnel needs the pressure injection note sealing slurry on the outside of shield machine body, and the viscosity of note sealing slurry is larger, can quickly exist
Sealant 300 is formed at shield tail 17, come seal gap between shield tail 17 and stratum 400 and shield tail 17 and shield duct piece 14 it
Between gap.
Specifically, the sealing slurry by HS-2 type pulping agent: sodium bentonite: water according to 1:6:20 mass ratio mixing and
At.Its specific gravity is 1.15-1.25.
It is appreciated that in other embodiments, pressure injection sealing can also be starched on the outside of entire shield machine body, to reach
Better seal effect.
In the present embodiment, sealing is starched on the outside of shield machine body by pressure injection using grouting system, pressure injection sequence is shield
Symmetrical waist-the top in the bottom-of machine body, so that sealing slurry forms sealant 300 at shield tail 17, it is close in sealant 300
Slurry seal starches the seal ring 200 to be formed with sealing and connects, and underground water can be effectively prevented between shield tail 17 and shield duct piece 14
Shield is penetrated into gap.
Further, the specific gravity control of note sealing slurry is P+0.1-P+0.2bar in 1.15-1.25, grouting pressure control
(P: when shield machine 100 normally tunnels, the internal pressure in native storehouse 13).
P value balances each other with stratum soil pressure and hydrostatic pressure, if the sum of 12 center stratum hydrostatic pressure of cutterhead, soil pressure are
P0, P0=γ h, wherein γ is the average severe of the soil body, and h is 12 center of cutterhead to the vertical range of earth's surface, then P=KP0,
The lateral coefficient of static earth pressure of K-soil.
Step S104 replaces the dregs in native storehouse 13 with the first injection slurry, in replacement process, to native 13 internal pressure of storehouse into
Row monitoring, and native 13 internal pressure of storehouse is improved into 0.1bar from initial value.
Specifically, the first injection slurry of mixing on the ground is pumped into bentonite tank 16 by grouting system, then led to
The dregs in 15 casting storehouse 13 of screw conveyor is crossed, so that dregs is down to Ban Cang by buying securities with all one's capital, and make inside native storehouse 13
Pressure value remains P；Then the first injection slurry in bentonite tank 16 is injected in native storehouse 13 by grouting pipeline 18, to Tu Cang
When liquid level in 13 rises to 90% or so, then with the mixing of the first injection slurry and dregs in 15 casting storehouse 13 of screw conveyor
Native 13 liquid level of storehouse is reduced by 40%~50%, continues to inject the first injection slurry into native storehouse 13 by object.It is recycled with this, when from Tu Cang
When the viscosity of the flowed out mud in 13 middle parts is identical as the viscosity of the first injection slurry, the dregs in native storehouse 13 is just all replaced into first
Injection slurry；At this point, continuing to inject the first injection slurry into native storehouse 13, the internal pressure in native storehouse 13 is made to be promoted to P+0.1bar.
Further, the internal pressure in native storehouse 13 is P+0.1bar and after pressure stabilizing 1 hour, and first time rotating cutter-head 12 makes it
10 ° or so of rotation；The first injection slurry of part in native storehouse 13 is penetrated into stratum 400 by pressure injection to face 410, fills
400 gap of stratum；And since the viscosity of the first injection slurry is lower, membrane structure will not be formed on face 410.Work as cutterhead
When 12 rotations cause native 13 internal pressure of storehouse to begin to decline, the first injection slurry is injected into native storehouse 13 using grouting pipeline 18, is made
The internal pressure in native storehouse 13 stabilizes to P+0.1bar.
, can also be after 13 internal pressure of native storehouse to stablize 2 hours it is appreciated that in other embodiments, cutterhead 12 rotates
9 ° or 11 °, herein, voltage stabling control and 12 rotational angle of cutterhead are not made specifically to limit.
In the present embodiment, the sensor for detecting native 13 internal pressure of storehouse is equipped in native storehouse 13.
Step S105 replaces the first injection slurry in native storehouse 13 with the second injection slurry, in replacement process, inside native storehouse 13
Pressure is monitored, and native 13 internal pressure of storehouse is improved 0.2bar from initial value；
Specifically, after native 13 inside pressure stabilizing of storehouse 3 hours, the first injection slurry, grouting pipeline are replaced using the second injection slurry
18 and screw conveyor 15 work at the same time, the first injection slurry of the second injection slurry and discharge is injected separately into, until the in native storehouse 13
One injection slurry is all replaced into the second injection slurry.When the viscosity of viscosity and the second injection slurry from the flowed out mud in native 13 middle part of storehouse
When identical, the first injection slurry in native storehouse 13 is just all replaced into the second injection slurry.In entire replacement process, inside native storehouse 13
Pressure is not less than initial value P.
Step S106, after pressure stabilizing, rotating cutter-head 12, make the second injection slurry filling cutter head of shield machine 12 and face 410 it
Between gap form stable mud film 500.
Specifically, after the completion of to be replaced and after 13 internal pressure pressure stabilizing of storehouse 5 hours native, second of rotating cutter-head 12 makes its rotation
Turn 10 ° or so, and the second injection slurry is injected into native storehouse 13 using grouting pipeline 18, the internal pressure in native storehouse 13 is made to stabilize to P+
0.2bar。
Internal pressure pressure stabilizing 5 hours after rotating cutter-head 12 to native storehouse 13, third time rotating cutter-head 12 made it rotate 45 ° of left sides
The pressure changing inside native storehouse 13 is observed on the right side, when cutterhead 12, which rotates native 13 internal pressure of storehouse, to be declined, using Grouting Pipe to
The second injection slurry is injected in native storehouse 13, the internal pressure in native storehouse 13 is made to stabilize to P+0.2bar.
After third time rotating cutter-head 12 and after the internal pressure pressure stabilizing in native storehouse 13 12 hours, if native 13 pressure of storehouse is stablized,
Third time rotating cutter-head 12 makes it be rotated by 360 ° left and right, observes the pressure changing inside native storehouse 13；
If cutterhead 12 rotates the decline of native 13 internal pressure of storehouse, the second injection slurry is injected into native storehouse 13 using Grouting Pipe,
The internal pressure in native storehouse 13 is set to stabilize to P+0.2bar；If cutterhead 12 rotate native 13 internal pressure of storehouse it is constant when, at this point, face
One layer of stable mud film is formd on 410, that is, has reached the condition of opening a position.
, can also be after 13 internal pressure of native storehouse stablize 4 or 6 hours it is appreciated that in other embodiments, 12 turns of cutterhead
9 ° or 11 ° dynamic, herein, voltage stabling control and 12 rotational angle of cutterhead are not made specifically to limit, in protection model of the invention
Within enclosing.
Earth pressure balanced shield, EPBS warehouse entry construction method of the invention first passes through the injection sealing on the outside of shield duct piece 14 and starches to be formed
Seal ring 200 prevents underground water from penetrating into shield machine 100 along 14 external series gap of shield duct piece；Then the pressure injection on the outside of shield machine body
Sealing slurry, forms sealant 300 at shield tail 17, prevent gas in native storehouse 13 by shield machine body and shield duct piece 14 it
Between gap loss into shield tail 17 and tunnel.Then to by replacing the first injection slurry, the second injection slurry in native storehouse 13, and
Rotating cutter-head 12 forms one layer of stable mud film 500 on face 410.
The present invention not only ensure that the steady of face 410 with the Water And Earth Pressures at method balance 410 rear of face held one's breath
It is fixed, and it is able to satisfy the security needs for the operation that opens a position；The displacement of the first injection slurry and the displacement of the second injection slurry are carried out later, and
The internal pressure for correspondingling increase native storehouse 13, reaches the required standard that opens a position, and finally carries out the operation that opens a position.
It is understood that for those of ordinary skill in the art, can do in accordance with the technical idea of the present invention
Various other changes and modifications out, and all these changes and deformation all should belong to the protection model of the claims in the present invention
It encloses.
Claims (10)
1. a kind of earth pressure balanced shield, EPBS warehouse entry construction method, which comprises the steps of:
The first injection slurry and the second injection slurry of grouting are prepared, the viscosity of first injection slurry is less than second injection slurry
Viscosity；
After shield machine stops driving, pressure injection sealing is starched to form seal ring on the outside of shield duct piece；
Pressure injection sealing slurry forms sealant at shield tail on the outside of the shield machine body；
The dregs in native storehouse is replaced with first injection slurry, and in replacement process, the native storehouse internal pressure is monitored, and
The native storehouse internal pressure is improved into 0.1bar from initial value；
First injection slurry in the native storehouse is replaced with second injection slurry, in replacement process, inside the native storehouse
Pressure is monitored, and native storehouse internal pressure is improved 0.2bar from initial value；
After pressure stabilizing, rotating cutter-head makes the gap between the second injection slurry filling cutter head of shield machine and face form stabilization
Mud film.
2. earth pressure balanced shield, EPBS warehouse entry construction method as described in claim 1, which is characterized in that first injection slurry glues
Degree is 65 ± 5Pas, and the viscosity of second injection slurry is 95 ± 5Pas.
3. earth pressure balanced shield, EPBS warehouse entry construction method as described in claim 1, which is characterized in that the sealing slurry includes volume
Than the first component and the second component for 1:1, first component is mixed by cement and water according to the mass ratio of 1:1, institute
It states the second component and is mixed by waterglass and water according to the volume ratio of 1:2.
4. earth pressure balanced shield, EPBS warehouse entry construction method as described in claim 1, which is characterized in that the sealing slurry is by HS-2 type
Pulping agent, sodium bentonite and water mix, and the mass ratio of the HS-2 type pulping agent, sodium bentonite and water is 1:6:
20。
5. earth pressure balanced shield, EPBS warehouse entry construction method as described in claim 1, which is characterized in that after shield machine stops driving,
Grouting system send sealing slurry to the outside of the shield duct piece, and injects the sealing slurry in section of jurisdiction injected hole, is formed
Seal ring；Shield duct piece position described in pressure injection is 4-6 ring after shield tail, and pressure injection sequence is the symmetrical waist in bottom-of the shield duct piece
Portion-top.
6. earth pressure balanced shield, EPBS warehouse entry construction method as claimed in claim 5, which is characterized in that using the grouting system to
Slurry is sealed on the outside of the shield machine body described in pressure injection, to seal between shield machine body and stratum and body and the shield
Gap between section of jurisdiction；Pressure injection sequence is the symmetrical waist-top in bottom-of the shield machine body.
7. earth pressure balanced shield, EPBS warehouse entry construction method as claimed in claim 6, which is characterized in that first use screw conveyor will
Part dregs discharge in the soil storehouse is then injected first injection slurry in the native storehouse using grouting pipeline, according to this
Circulation, until the dregs in the native storehouse is all replaced by first injection slurry, in entire replacement process, the soil
Storehouse internal pressure is not less than the initial value.
8. earth pressure balanced shield, EPBS warehouse entry construction method as claimed in claim 7, which is characterized in that the slag in the soil storehouse
Soil replaces completion and the native storehouse internal pressure after a period of stabilisation, and cutterhead turns an angle, the part in the soil storehouse
First injection slurry is by pressure injection to face, when the native storehouse internal pressure decline, using the grouting system to institute
It states and injects first injection slurry in native storehouse, until the native storehouse internal pressure stabilizes to the initial value+0.1bar.
9. earth pressure balanced shield, EPBS warehouse entry construction method as claimed in claim 8, which is characterized in that use the screw conveyor
First injection slurry in the native storehouse is discharged, second slip casting is injected into the native storehouse using the grouting pipeline
Liquid, the discharge of first injection slurry progress synchronous with injection of second injection slurry, described the in the soil storehouse
One injection slurry is all to be replaced into second injection slurry, and in entire replacement process, soil storehouse internal pressure is not less than
The initial value.
10. earth pressure balanced shield, EPBS warehouse entry construction method as claimed in claim 9, which is characterized in that the institute in the native storehouse
After stating that the first injection slurry is all and being replaced into second injection slurry, the cutterhead is slowly rotated at interval of certain time, described
Part second injection slurry in native storehouse in pressure injection to face, is ultimately formed one layer of stable mud film；As the Tu Cang
When internal pressure declines, second injection slurry is injected into the native storehouse using the grouting system, until in the native storehouse
Until portion's pressure stabilizes to the initial value+0.2bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811454632.XA CN109403997A (en) | 2018-11-30 | 2018-11-30 | Earth pressure balanced shield, EPBS warehouse entry construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811454632.XA CN109403997A (en) | 2018-11-30 | 2018-11-30 | Earth pressure balanced shield, EPBS warehouse entry construction method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110939451A (en) * | 2019-12-24 | 2020-03-31 | 中铁隧道集团三处有限公司 | Construction method for preventing shield construction from penetrating through building to prevent settlement |
| CN111042825A (en) * | 2019-12-23 | 2020-04-21 | 河海大学 | Repairing method for deterioration and ventilation of excavation face mud film during under-pressure cabin opening of earth pressure balance shield |
| CN111305860A (en) * | 2020-04-15 | 2020-06-19 | 中铁四局集团有限公司 | Shield under-pressure opening method for strong-permeability and water-permeable stratum |
| CN112408853A (en) * | 2020-11-12 | 2021-02-26 | 上海隧道工程有限公司 | Pipe jacking slurry with micro bearing capacity and preparation method thereof |
| CN112523763A (en) * | 2020-12-01 | 2021-03-19 | 中铁十二局集团有限公司 | Long-time shutdown construction method for water-rich sand layer shield |
| CN113137239A (en) * | 2021-05-15 | 2021-07-20 | 中铁十一局武汉重型装备有限公司 | Shield cutter head face reinforcing method and grouting reinforcing device used for method |
| CN113279769A (en) * | 2021-05-24 | 2021-08-20 | 广东电网有限责任公司广州供电局 | Construction method for opening freezing cutter head under shield tunneling machine air pressure balance condition |
| CN113323679A (en) * | 2021-06-24 | 2021-08-31 | 广州地铁设计研究院股份有限公司 | Shield opening operation method for water-rich stratum |
| CN113738385A (en) * | 2021-09-24 | 2021-12-03 | 湖南中天凿岩科技有限公司 | Under-pressure entry method of mud-restraining effect auxiliary shield |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111042825A (en) * | 2019-12-23 | 2020-04-21 | 河海大学 | Repairing method for deterioration and ventilation of excavation face mud film during under-pressure cabin opening of earth pressure balance shield |
| CN111042825B (en) * | 2019-12-23 | 2020-11-06 | 河海大学 | Repairing method for deterioration and ventilation of excavation face mud film during under-pressure cabin opening of earth pressure balance shield |
| CN110939451A (en) * | 2019-12-24 | 2020-03-31 | 中铁隧道集团三处有限公司 | Construction method for preventing shield construction from penetrating through building to prevent settlement |
| CN111305860A (en) * | 2020-04-15 | 2020-06-19 | 中铁四局集团有限公司 | Shield under-pressure opening method for strong-permeability and water-permeable stratum |
| CN111305860B (en) * | 2020-04-15 | 2021-06-08 | 中铁四局集团有限公司 | Shield under-pressure opening method for strong-permeability and water-permeable stratum |
| CN112408853A (en) * | 2020-11-12 | 2021-02-26 | 上海隧道工程有限公司 | Pipe jacking slurry with micro bearing capacity and preparation method thereof |
| CN112523763A (en) * | 2020-12-01 | 2021-03-19 | 中铁十二局集团有限公司 | Long-time shutdown construction method for water-rich sand layer shield |
| CN113137239A (en) * | 2021-05-15 | 2021-07-20 | 中铁十一局武汉重型装备有限公司 | Shield cutter head face reinforcing method and grouting reinforcing device used for method |
| CN113137239B (en) * | 2021-05-15 | 2023-08-22 | 中铁十一局武汉重型装备有限公司 | Method for reinforcing tunnel face of shield cutter head and grouting reinforcing device for method |
| CN113279769A (en) * | 2021-05-24 | 2021-08-20 | 广东电网有限责任公司广州供电局 | Construction method for opening freezing cutter head under shield tunneling machine air pressure balance condition |
| CN113323679A (en) * | 2021-06-24 | 2021-08-31 | 广州地铁设计研究院股份有限公司 | Shield opening operation method for water-rich stratum |
| CN113738385A (en) * | 2021-09-24 | 2021-12-03 | 湖南中天凿岩科技有限公司 | Under-pressure entry method of mud-restraining effect auxiliary shield |
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Application publication date: 20190301 |