CN104695970A - Mud concentration type shield tunneling construction method for shield tunneling machine - Google Patents
Mud concentration type shield tunneling construction method for shield tunneling machine Download PDFInfo
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- CN104695970A CN104695970A CN201410380759.7A CN201410380759A CN104695970A CN 104695970 A CN104695970 A CN 104695970A CN 201410380759 A CN201410380759 A CN 201410380759A CN 104695970 A CN104695970 A CN 104695970A
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- mud
- agent
- dense
- shield machine
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Classifications
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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
-
- 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
Abstract
The invention relates to a mud concentration type shield tunneling construction method for a shield tunneling machine. According to the method, an excavating surface and an over-excavation part are pressurized and filled with thick mud to form a mud film layer, so that the accidents of surface subsidence, upheaval and the like can be completely eliminated, construction accuracy is well improved, and the cost is reduced; a plasticizer is added, and a lubricating layer is maintained, so that long-distance tunneling, sharp curve tunneling and rock stratum tunneling are facilitated; working shafts are reduced, working efficiency is improved, and the cost of a construction period is reduced; a vacuum mud discharging manner is adopted, so that low workload and high safety are achieved, forced ventilation in a tunnel can be driven, and harmful gas hazards such as gas in the tunnel can be completely eliminated.
Description
Technical field
The present invention relates to a kind of method for tunnel construction, especially a kind of dense formula extrusion of mud of shield machine.
Background technology
At present, China's major part urban tunnel construction adopts earth pressure balanced shield, EPBS construction, this method is comparatively suitable for based on fine grained, water permeability is less and be easy to the stratum forming Plastic Flow state after disturbance, and cost also can cheap about 30% compared with Slurry Shield.But when when the interval most of paragraph of shield structure is fine grained soil layer there is the larger coarse sand of permeability and sand and gravel stratum in local, the paragraph of the large water permeability of earth pressure balanced shield, EPBS well can not keep the stable of excavation face, is easy to cause excavation face unstability to cave in and the accident such as surface subsidence.If because local segment drops out now large water permeability stratum and adopt Slurry Shield between the whole district, then construction costs can be caused significantly to rise.
Summary of the invention
The technical problem to be solved in the present invention is: the dense formula extrusion of mud proposing a kind of low cost, shield machine that construction quality is stable.
The technical solution adopted in the present invention is: a kind of dense formula extrusion of mud of shield machine, comprises the following steps:
1) occur at mud and add powder clay and tackifier to modulate dense mud in treatment system, after described powder clay and tackifier are uniformly mixed, making the dense mud that slump is 18 ~ 22;
2) add to mould agent A agent and add and mould agent B agent adding to mould in agent generation and treatment system to make, and make 100L N solvent by adding the water moulding agent A agent 23 ~ 27kg and 82 ~ 85kg; Another kind of 100L M solvent is made by adding the water moulding agent B agent 8 ~ 12kg and 90 ~ 94kg; The two kinds of 100L solvents made separately stir placement;
3) from mud conveying pipeline by step 1) in the dense mud that modulates deliver to the end face of cutter head of shield machine and the spray mud mouth ejection of periphery;
4) shield machine starts the work of pushing ahead, the native sand produced in digging process is full of cutterhead Tu Cang and excavation surface after mixing with the dense mud stirring of ejection, and is spilled over to the permeable formation lubrication mud film forming 300 ~ 400mm around the tube coupling laid around shield machine body and in tunnel by cutterhead Tu Cang;
5) by step 2) in Manufactured N solvent and M solvent deliver to adding around shield machine body outer wall and tube coupling according to the ratio of volume ratio 1:1 by conveyance conduit and mould after agent ejiction opening mixes and form gel-thickened compound, continuous lubrication body and tube coupling;
6) the mixed dregs in cutterhead front end enters after Tu Cang and excavation face soil pressure balance, and is attracted and intermittently drain into mudstone to be separated storage mud groove by spoil disposal vacuum valve by mud discharging mouth;
7) cutterhead aperture opening ratio is large, and lithosphere is swept along by mud and entered mud discharging mouth by spoil disposal vacuum valve attraction discharge after rubble;
8) the large native sand that can transport produces negative pressure by vacuum pump and transports outside hole by spoil disposal pipeline; Large gravel not by vacuum attraction is transported by dolly in hole; Transport to the native sand outside hole, directly transport process by vacuum tube car.
Further, step 1 of the present invention) in the component of tackifier comprise: disodium metasilicate, carboxymethyl calcium cellulose, crosslinked acrylic polymer and sodium salt, wherein: the mass percent of disodium metasilicate is 5% ~ 8%, the cellulosic mass percent of carboxymethyl calcium is 3% ~ 5%, the mass percent of crosslinked acrylic polymer is 2% ~ 2.5%, the mass percent of sodium salt is 2.4 ~ 2.5%; Obtained dense mud proportion be 1.3 ~ 1.5.
Further say, step 2 of the present invention) in, described plasticizer A agent comprises acrylic acid and salt tolerance silica; Wherein: acrylic acid mass percent is 1% ~ 2%, the mass percent of salt tolerance silica is 5% ~ 8%;
Described plasticizer B agent comprises polyacrylamide and Sodium Polyacrylate, and wherein the mass percentage content of polyacrylamide is 5% ~ 7%, and the mass percentage content of Sodium Polyacrylate is 8% ~ 10%.
Step 6 of the present invention) sludge discharge way be vacuum transport mode.Only when through step 1) in stir after slump about 20 mud smoothly by follow-up vacuum mud valve discharge, long distance delivery can be realized.
Step 7 of the present invention) sludge discharge way make middle rock enter in pipe after fragmentation, by Cemented filling rubble, reduce workload, raise the efficiency, increase safety.
Shield machine is provided with high moment of torsion cutterhead, can excavate rock-soil layer; Simultaneously can in machine tool changing head, can advance the long distance of rock-soil layer; And due to the propelling of long distance, the quantity of vertical shaft effectively can be reduced.
The present invention, under atmospheric pressure effect, transports outside hole to the large native sand that can transport by vacuum pressure, and in addition, the large gravel not by vacuum attraction is transported by waggon in hole; And the native sand transported to outside hole, be stored in mud groove and directly transport process by vacuum tube car.
The present invention can apply in daily tunnel construction, comprises shield-tunneling construction, shield structure and propelling construction or propelling construction.
The invention has the beneficial effects as follows: 1, by dense mud, excavation surface and the portion's of backbreaking pressurization are full of, form mud rete, can stop the accident such as surface subsidence, protuberance occurs, well improve construction precision, cost reduction; 2, pass through to add plasticizer, keep lubricating layer, be conducive to doing long distance propelling, anxious curve advances and lithosphere advances; Reduce working shaft, increase work efficiency, save duration every cost; 3, not only workload is little for vacuum sludge discharge way, and safety is high, can drive forced ventilation in tunnel, stops the generation of the pernicious gas harm such as gas in tunnel.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is constructing structure schematic diagram of the present invention;
In figure: 1, mud occurs and treatment system; 2, tackifier; 3, add and mould agent generation and treatment system; 4, add and mould agent; 5, mud conveying pipeline; 6, cutterhead; 7, mud mouth is sprayed; 8, cutterhead Tu Cang; 9, conveyance conduit; 10, add and mould agent ejiction opening; 11, mud discharging mouth; 12, spoil disposal vacuum valve; 13, mud groove is stored up; 14, vacuum pump; 15, spoil disposal pipeline; 16, dolly; 17, mud tank is stored up.
Detailed description of the invention
The present invention is further detailed explanation with preferred embodiment by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
Structure as shown in Figure 1,
Embodiment 1
The dense formula extrusion of mud of shield machine, comprises the following steps:
1) occur at mud and add powder clay and tackifier 2 to modulate dense mud in treatment system 1, after described powder clay and tackifier are uniformly mixed, making the dense mud that slump is 18;
The component of tackifier comprises: disodium metasilicate (CAS 15457-97-3), carboxymethyl calcium cellulose (CAS 9050-04-8), crosslinked acrylic polymer and sodium salt, wherein: the mass percent of disodium metasilicate is 5%, the cellulosic mass percent of carboxymethyl calcium is 3%, the mass percent of crosslinked acrylic polymer is 2%, the mass percent of sodium salt is 2.5%; All the other are water, obtained dense mud proportion be 1.3 ~ 1.5.
2) add to mould agent A agent and add and mould agent B agent adding to mould in agent generation and treatment system 3 to make, and make 100L N solvent by adding the water moulding agent A agent 23kg and 82kg; Another kind of 100L M solvent is made by adding the water moulding agent B agent 8kg and 90kg; The two kinds of 100L solvents made separately stir placement;
Wherein, plasticizer A agent comprises acrylic acid and salt tolerance silica; Wherein: acrylic acid mass percent is 1%, the mass percent of salt tolerance silica is 5%; All the other are water;
Plasticizer B agent comprises polyacrylamide (CAS 9003-05-8) and Sodium Polyacrylate (CAS 9033-79-8), and wherein the mass percentage content of polyacrylamide is 5%, and the mass percentage content of Sodium Polyacrylate is 8%; All the other are water.
3) from mud conveying pipeline 5 by step 1) in the spray mud mouth 7 of the dense mud that the modulates end face and periphery of delivering to cutter head of shield machine 6 spray;
4) shield machine starts the work of pushing ahead, the native sand produced in digging process is full of cutterhead soil storehouse 8 and excavation surface after mixing with the dense mud stirring of ejection, and is spilled over to the permeable formation forming 300 ~ 400mm around the tube coupling laid around shield machine body and in tunnel by cutterhead Tu Cang and lubricates mud film;
5) by step 2) in Manufactured N solvent and M solvent deliver to adding around shield machine body outer wall and tube coupling according to the ratio of volume ratio 1:1 by conveyance conduit 9 and mould after agent ejiction opening 10 mixes and form gel-thickened compound, continuous lubrication body and tube coupling;
6) the mixed dregs in cutterhead front end enters after native storehouse 8 balance with excavation face soil pressure, to be attracted and intermittently drain into mudstone to be separated and to store up mud groove 13 by mud discharging mouth 11 by spoil disposal vacuum valve 12;
7) cutterhead aperture opening ratio is large, and lithosphere is swept along by mud and entered mud discharging mouth and attract to discharge by spoil disposal vacuum valve 12 after rubble;
8) the large native sand that can transport produces negative pressure by vacuum pump 14 and transports outside hole by spoil disposal pipeline 15; Large gravel not by vacuum attraction is transported by dolly 16 in hole; Transport to the native sand outside hole, directly transport process by vacuum tube car.
Embodiment 2
The dense formula extrusion of mud of shield machine, comprises the following steps:
1) occur at mud and add powder clay and tackifier 2 to modulate dense mud in treatment system 1, after described powder clay and tackifier are uniformly mixed, making the dense mud that slump is 22;
The component of tackifier comprises: disodium metasilicate (CAS 15457-97-3), carboxymethyl calcium cellulose (CAS 9050-04-8), crosslinked acrylic polymer and sodium salt, wherein: the mass percent of disodium metasilicate is 8%, the cellulosic mass percent of carboxymethyl calcium is 5%, the mass percent of crosslinked acrylic polymer is 2.5%, the mass percent of sodium salt is 2.5%; All the other are water, obtained dense mud proportion be 1.3 ~ 1.5.
2) add to mould agent A agent and add and mould agent B agent adding to mould in agent generation and treatment system 3 to make, and make 100L N solvent by adding the water moulding agent A agent 27kg and 85kg; Another kind of 100L M solvent is made by adding the water moulding agent B agent 12kg and 94kg; The two kinds of 100L solvents made separately stir placement;
Wherein, plasticizer A agent comprises acrylic acid and salt tolerance silica; Wherein: acrylic acid mass percent is 2%, the mass percent of salt tolerance silica is 8%; All the other are water;
Plasticizer B agent comprises polyacrylamide (CAS 9003-05-8) and Sodium Polyacrylate (CAS 9033-79-8), and wherein the mass percentage content of polyacrylamide is 7%, and the mass percentage content of Sodium Polyacrylate is 10%; All the other are water.
3) from mud conveying pipeline 5 by step 1) in the spray mud mouth 7 of the dense mud that the modulates end face and periphery of delivering to cutter head of shield machine 6 spray;
4) shield machine starts the work of pushing ahead, the native sand produced in digging process is full of cutterhead soil storehouse 8 and excavation surface after mixing with the dense mud stirring of ejection, and is spilled over to the permeable formation forming 300 ~ 400mm around the tube coupling laid around shield machine body and in tunnel by cutterhead Tu Cang and lubricates mud film;
5) by step 2) in Manufactured N solvent and M solvent deliver to adding around shield machine body outer wall and tube coupling according to the ratio of volume ratio 1:1 by conveyance conduit 9 and mould after agent ejiction opening 10 mixes and form gel-thickened compound, continuous lubrication body and tube coupling;
6) the mixed dregs in cutterhead front end enters after native storehouse 8 balance with excavation face soil pressure, to be attracted and intermittently drain into mudstone to be separated and to store up mud groove 13 by mud discharging mouth 11 by spoil disposal vacuum valve 12;
7) cutterhead aperture opening ratio is large, and lithosphere is swept along by mud and entered mud discharging mouth and attract to discharge by spoil disposal vacuum valve 12 after rubble;
8) the large native sand that can transport produces negative pressure by vacuum pump 14 and transports outside hole by spoil disposal pipeline 15; Large gravel not by vacuum attraction is transported by dolly 16 in hole; Transport to the native sand outside hole, directly transport process by vacuum tube car.
Embodiment 3
The dense formula extrusion of mud of shield machine, comprises the following steps:
1) occur at mud and add powder clay and tackifier 2 to modulate dense mud in treatment system 1, after described powder clay and tackifier are uniformly mixed, making the dense mud that slump is 20;
The component of tackifier comprises: disodium metasilicate (CAS 15457-97-3), carboxymethyl calcium cellulose (CAS 9050-04-8), crosslinked acrylic polymer and sodium salt, wherein: the mass percent of disodium metasilicate is 6%, the cellulosic mass percent of carboxymethyl calcium is 4%, the mass percent of crosslinked acrylic polymer is 2.2%, the mass percent of sodium salt is 2.5%; All the other are water, obtained dense mud proportion be 1.3 ~ 1.5.
2) add to mould agent A agent and add and mould agent B agent adding to mould in agent generation and treatment system 3 to make, and make 100L N solvent by adding the water moulding agent A agent 25kg and 83kg; Another kind of 100L M solvent is made by adding the water moulding agent B agent 10kg and 92kg; The two kinds of 100L solvents made separately stir placement;
Wherein, plasticizer A agent comprises acrylic acid and salt tolerance silica; Wherein: acrylic acid mass percent is 1.5%, the mass percent of salt tolerance silica is 6%; All the other are water;
Plasticizer B agent comprises polyacrylamide (CAS 9003-05-8) and Sodium Polyacrylate (CAS 9033-79-8), and wherein the mass percentage content of polyacrylamide is 6%, and the mass percentage content of Sodium Polyacrylate is 9%; All the other are water.
3) from mud conveying pipeline 5 by step 1) in the spray mud mouth 7 of the dense mud that the modulates end face and periphery of delivering to cutter head of shield machine 6 spray;
4) shield machine starts the work of pushing ahead, the native sand produced in digging process is full of cutterhead soil storehouse 8 and excavation surface after mixing with the dense mud stirring of ejection, and is spilled over to the permeable formation forming 300 ~ 400mm around the tube coupling laid around shield machine body and in tunnel by cutterhead Tu Cang and lubricates mud film;
5) by step 2) in Manufactured N solvent and M solvent deliver to adding around shield machine body outer wall and tube coupling according to the ratio of volume ratio 1:1 by conveyance conduit 9 and mould after agent ejiction opening 10 mixes and form gel-thickened compound, continuous lubrication body and tube coupling;
6) the mixed dregs in cutterhead front end enters after native storehouse 8 balance with excavation face soil pressure, to be attracted and intermittently drain into mudstone to be separated and to store up mud groove 13 by mud discharging mouth 11 by spoil disposal vacuum valve 12;
7) cutterhead aperture opening ratio is large, and lithosphere is swept along by mud and entered mud discharging mouth and attract to discharge by spoil disposal vacuum valve 12 after rubble;
8) the large native sand that can transport produces negative pressure by vacuum pump 14 and transports outside hole by spoil disposal pipeline 15; Large gravel not by vacuum attraction is transported by dolly 16 in hole; Transport to the native sand outside hole, directly transport process by vacuum tube car.
The just the specific embodiment of the present invention described in above manual, various illustrating is not construed as limiting flesh and blood of the present invention, person of an ordinary skill in the technical field after having read manual can to before described detailed description of the invention make an amendment or be out of shape, and do not deviate from the spirit and scope of the invention.
Claims (3)
1. the dense formula extrusion of the mud of shield machine, is characterized in that comprising the following steps:
1) occur at mud and add powder clay and tackifier to modulate dense mud in treatment system, after described powder clay and tackifier are uniformly mixed, making the dense mud that slump is 18 ~ 22;
2) add to mould agent A agent and add and mould agent B agent adding to mould in agent generation and treatment system to make, and make 100L N solvent by adding the water moulding agent A agent 23 ~ 27kg and 82 ~ 85kg; Another kind of 100L M solvent is made by adding the water moulding agent B agent 8 ~ 12kg and 90 ~ 94kg; The two kinds of 100L solvents made separately stir placement;
3) from mud conveying pipeline by step 1) in the dense mud that modulates deliver to the end face of cutter head of shield machine and the spray mud mouth ejection of periphery;
4) shield machine starts the work of pushing ahead, the native sand produced in digging process is full of cutterhead Tu Cang and excavation surface after mixing with the dense mud stirring of ejection, and is spilled over to the permeable formation lubrication mud film forming 300 ~ 400mm around the tube coupling laid around shield machine body and in tunnel by cutterhead Tu Cang;
5) by step 2) in Manufactured N solvent and M solvent deliver to adding around shield machine body outer wall and tube coupling according to the ratio of volume ratio 1:1 by conveyance conduit and mould after agent ejiction opening mixes and form gel-thickened compound, continuous lubrication body and tube coupling;
6) the mixed dregs in cutterhead front end enters after Tu Cang and excavation face soil pressure balance, and is attracted and intermittently drain into mudstone to be separated storage mud groove by spoil disposal vacuum valve by mud discharging mouth;
7) cutterhead aperture opening ratio is large, and lithosphere is swept along by mud and entered mud discharging mouth by spoil disposal vacuum valve attraction discharge after rubble;
8) the large native sand that can transport produces negative pressure by vacuum pump and transports outside hole by spoil disposal pipeline; Large gravel not by vacuum attraction is transported by dolly in hole; Transport to the native sand outside hole, directly transport process by vacuum tube car.
2. the dense formula extrusion of the mud of a kind of shield machine as claimed in claim 1, it is characterized in that: described step 1) in the component of tackifier comprise: disodium metasilicate, carboxymethyl calcium cellulose, crosslinked acrylic polymer and sodium salt, wherein: the mass percent of disodium metasilicate is 5% ~ 8%, the cellulosic mass percent of carboxymethyl calcium is 3% ~ 5%, the mass percent of crosslinked acrylic polymer is 2% ~ 2.5%, the mass percent of sodium salt is 2.4 ~ 2.5%; Obtained dense mud proportion be 1.3 ~ 1.5.
3. the dense formula extrusion of the mud of a kind of shield machine as claimed in claim 1, is characterized in that: described step 2) in, described plasticizer A agent comprises acrylic acid and salt tolerance silica; Wherein: acrylic acid mass percent is 1% ~ 2%, the mass percent of salt tolerance silica is 5% ~ 8%;
Described plasticizer B agent comprises polyacrylamide and Sodium Polyacrylate, and wherein the mass percentage content of polyacrylamide is 5% ~ 7%, and the mass percentage content of Sodium Polyacrylate is 8% ~ 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410380759.7A CN104695970A (en) | 2014-08-04 | 2014-08-04 | Mud concentration type shield tunneling construction method for shield tunneling machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410380759.7A CN104695970A (en) | 2014-08-04 | 2014-08-04 | Mud concentration type shield tunneling construction method for shield tunneling machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134228A (en) * | 2015-08-31 | 2015-12-09 | 江苏锐成机械有限公司 | Improved thick mud type tunneling construction method for shield tunneling machine |
| 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 |
| CN113651550A (en) * | 2021-08-16 | 2021-11-16 | 中铁十局集团有限公司 | Mudstone and clay geological shield muck improvement dispersant, and preparation and application thereof |
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| CN113651550A (en) * | 2021-08-16 | 2021-11-16 | 中铁十局集团有限公司 | Mudstone and clay geological shield muck improvement dispersant, and preparation and application thereof |
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Application publication date: 20150610 |