CN103244132A - Construction method for crossing houses by aid of shield tunneling machine in sandy soil and slurry injecting system - Google Patents
Construction method for crossing houses by aid of shield tunneling machine in sandy soil and slurry injecting system Download PDFInfo
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- CN103244132A CN103244132A CN2013101562374A CN201310156237A CN103244132A CN 103244132 A CN103244132 A CN 103244132A CN 2013101562374 A CN2013101562374 A CN 2013101562374A CN 201310156237 A CN201310156237 A CN 201310156237A CN 103244132 A CN103244132 A CN 103244132A
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Abstract
The invention provides a construction method for crossing houses by the aid of a shield tunneling machine in sandy soil. The construction method is characterized in that synchronous slurry is continuously and synchronously injected into channel walls by a slurry injecting system when the shield tunneling machine tunnels, slurry is secondarily replenished to parts of the channel walls after parts of segments are constructed and laid by the shield tunneling machine, and the parts of the channel walls are positioned on outer sides of the constructed parts of the segments. The construction method has the advantages that the special synchronous slurry is injected on the tunneled parts of the channel walls during tunneling, settlement in a propelling procedure and later construction stages can be effectively controlled after the slurry is solidified, the problem of settlement after construction is further prevented owing to secondary slurry replenished during construction, and effective protection is provided for a formed tunnel; and technical problems in the aspect of effectively controlling settlement in the sandy soil are solved.
Description
Technical field
The present invention relates to the realm of building construction, relate in particular to a kind of in sandy soil shield machine pass through job practices and the filling system in house.
Background technology
Quickening along with China's urban construction paces, particularly the development of track traffic has reached unprecedented scale, in city undergrounds such as Shanghai, Guangzhou, Shenzhen, Nanjing, Beijing, Suzhou are constructed on a large scale, and subway is all built in plan or preparation in other a plurality of cities, the whole nation.Because the subway work security risk is bigger, the geological condition of each individual works, surrounding enviroment, scale require to have nothing in common with each other, and the reasonability of design scheme and constructure scheme has been proposed higher requirement.
Shield-tunneling construction is underground concealed engineering, exist certain risk, when it is constructed, exist many not intellectuals, especially in some bad grounds, such as in sandy soil layer, there is good water permeability, moving unfavorable geology phenomenons such as easily producing quicksand under the water condition.For advancing at such highstrung soil layer, the settlement request that how to guarantee to pass through house in the zone is very high.Though at present the shield structure advances many engineerings were arranged in sandy soil, not very desirable for the control of sedimentation.Therefore running into similar condition of construction can't obtain fine solution.
Summary of the invention
The technical problem to be solved in the present invention is how effectively to control sedimentation phenomenon in sandy soil.
In order to solve this technical problem, the invention provides a kind of job practices that shield machine passes through the house in sandy soil, in the process of described shield machine driving, constantly inject synchronous slurries by a filling system synchronously toward conduit wall, and the conduit wall of the outside, part section of jurisdiction of finishing constructing the back being laid in the construction of part section of jurisdiction at described shield machine carries out mending the second time slurry.
Described synchronous slurries comprise pulverized limestone, coal ash sand, swell soil, water and water reducing agent, and nominal mix proportion is 60:400:800:70:530:2 or 70:300:930:67:540:3.
After five endless tube sheets of shield tail are deviate from the section of jurisdiction of described shield machine, begin to carry out to mend slurry the second time, before the 7th endless tube sheet is deviate from the shield tail, finish and mend slurry for the second time.
When mending slurry for the second time, mending the slurry number of times is 3 to 5 times, and each volume of mending slurry is 0.7～1.05 square metre.
In the tunneling construction process of sharp radius curve, the otch soil pressure is 1.2 times to 1.3 times of theoretical pressure, and the speed of driving is 3 centimetres of per minutes.
In the tunneling construction process of sharp radius curve, be provided with the ring of turning between described section of jurisdiction.
Described shield machine is the radial type balancing earth-pressure shielding machine.
Described filling system comprises that one is mixed slurry system, slurry can, slurry car, chassis slurry case, grouting pump and grouting pipeline automatically, raw material form described synchronous slurries by described stirring of mixing the slurry system automatically, then described synchronous slurries are transferred to described slurry can, described slurry can is delivered to described slurry car with described synchronous slurries, described slurry car transfers to chassis slurry case with described synchronous slurries, and final described grouting pump is annotated described synchronous slurries on the conduit wall by being communicated to the outer grouting pipeline of shield machine.
Shown in the pumping cylinder quantity of grouting pump be 2, and stroke is per minute 2 * 8.73 times during maximum output.
Slurries during second pulp feeding are the biliquid slurry, and described biliquid slurry comprises water glass solution and cement paste, and water glass is 1:3 with the ratio of water in the described water glass solution, and water/binder ratio is 1:1 in the described cement paste, and the volume ratio of described water glass solution and described cement paste is 1:1.
The present invention also provides a kind of filling system, be used for injecting synchronous slurries in the process of described shield machine driving synchronously toward conduit wall, comprise that is mixed a slurry system automatically, slurry can, the slurry car, chassis slurry case, grouting pump and grouting pipeline, the described slurry system of mixing automatically is used for raw material are stirred the described synchronous slurries of formation, described slurry can is used for storing the described slurry system of mixing automatically and stirs the synchronous slurries that form, described slurry car is used for the synchronous slurries of described slurry can are transferred to described chassis slurry case, and described grouting pump is used for described synchronous slurries are annotated conduit wall by being communicated to the outer grouting pipeline of shield machine.
The present invention is by injecting special synchronous slurries toward the conduit wall that has excavated when tunneling; after slurries solidify; can effectively control in the progradation and the ground settlement in construction later stage; in addition; second pulp feeding during by construction; prevented the settlement issues after the construction further, the tunnel that forms for driving provides excellent protection.Solved technical problem in sandy soil, how effectively to control sedimentation phenomenon.
Description of drawings
Fig. 1 is the structural representation of the filling system that provides of one embodiment of the invention;
Among the figure, 100-automatically mix the slurry system; 101-slurry can; 102-slurry car; 103-chassis slurry case; 104-grouting pump; 201-shield machine; 202-conduit wall.
The specific embodiment
Below with reference to Fig. 1 the job practices that shield machine passes through the house in sandy soil provided by the invention is described in detail, it is the present invention's one optional embodiment, can think that those skilled in the art can make amendment to it in the scope of not revising spirit of the present invention and content and polishes according to known general knowledge.
Present embodiment provides a kind of job practices that shield machine passes through the house in sandy soil, in the process of described shield machine driving, constantly inject synchronous slurries by a filling system synchronously toward conduit wall, and the conduit wall of the outside, part section of jurisdiction of finishing constructing the back being laid in the construction of part section of jurisdiction at described shield machine carries out mending the second time slurry.
The present invention is by injecting special synchronous slurries toward the conduit wall that has excavated when tunneling; after slurries solidify; can effectively control in the progradation and the ground settlement in construction later stage; in addition; second pulp feeding during by construction; prevented the settlement issues after the construction further, the tunnel that forms for driving provides excellent protection.Solved technical problem in sandy soil, how effectively to control sedimentation phenomenon.
Described synchronous slurries comprise pulverized limestone, coal ash sand, swell soil, water and water reducing agent, and nominal mix proportion is 60:400:800:70:530:2 or 70:300:930:67:540:3.The novel synchronization slurries are compared it and are had good long term stability and flowability, water retention, suitable initial setting time, good filling property energy, not easily dilutable, fixed volume contraction is little, bleeding rate is little advantage with traditional inert slurry, hardening capacity slurries.Can realize the matched well between filling, flowability, the consolidation strength three.Simultaneously, the performance of synchronous slurries is also had special requirement, its concrete data can be with reference to following table:
In the present embodiment, after five endless tube sheets of shield tail are deviate from the section of jurisdiction of described shield machine, begin to carry out to mend slurry the second time, before the 7th endless tube sheet is deviate from the shield tail, finish and mend slurry for the second time.When mending slurry for the second time, mending the slurry number of times is 3 to 5 times, and each volume of mending slurry is 0.7～1.05 square metre.Specifically, after shield machine is finished the section of jurisdiction by assembling machine and whirler splicing, shield machine continues driving forward, the section of jurisdiction can be deviate from by the shield tail along with the driving of shield machine, when deviating from the section of jurisdiction of five rings, duct wall to the outside, the section of jurisdiction of deviating from carries out second pulp feeding, in order to make the slurries mended to be solidified and then played the purpose that prevents sedimentation by it, need finish before the 7th endless tube sheet is deviate from the shield tail and mend slurry.
In the present embodiment, slurries during second pulp feeding are the biliquid slurry, and described biliquid slurry comprises water glass solution and cement paste, and water glass is 1:3 with the ratio of water in the described water glass solution, water/binder ratio is 1:1 in the described cement paste, and the volume ratio of described water glass solution and described cement paste is 1:1.In addition, the scope of the modulus of water glass is 2.6 to 2.8, and the scope of Baume degrees is 39 to 48.
In the present embodiment, the control of the grouting pressure of second pulp feeding is at 0.4 kPa.
Be easy to generate in the curved section progradation and have more native phenomenon, big to the settlement influence in ground and house.In the tunneling construction process of sharp radius curve, the otch soil pressure is 1.2 times to 1.3 times of theoretical pressure, and the speed of driving is 3 centimetres of per minutes, does that like this equilibrium of shield structure is at the uniform velocity constructed, and reduces shield-tunneling construction to the influence on ground; In the tunneling construction process of sharp radius curve, be provided with the ring of turning between described section of jurisdiction; Described shield machine is the radial type balancing earth-pressure shielding machine, because this shield machine has increased hinge portion, makes shield structure otch to support ring, and support ring has increased the sensitivity of shield machine to shield urogenesis live body.
In addition, must synchronous grouting in the tunneling construction process of sharp radius curve must strengthen the mud jacking amount in the curved section outside, to fill up the construction space, reinforce the outside soil body, the shield structure is advanced along the design axis smoothly.When every ring advances, should adjust grouting amount and parameter at any time according to the deformation monitoring situation in the construction, and note guaranteeing the slurries quality.Guaranteeing under the situation that the shield tail does not leak the synchronous slurries of heavy dose of injection.Simultaneously, when curve is constructed, can backbreak according to advancing the axis situation to carry out part, the amount of backbreaking is more big, and the curve construction is more easy.But then, backbreaking to make simultaneous grouting slurry loosening around going into the excavation face because of the soil body, and the factor that counter-force descends when adding upper curve and advancing can produce the problem that tunnel deformation increases.Therefore, in work progress, do the shield structure amount of being unearthed and control the unearthed amount that every ring can be effectively controlled in test.
Please refer to Fig. 1, described filling system comprises that is mixed a slurry system 100 automatically, slurry can 101, slurry car 102, chassis slurry case 103, grouting pump 104 and grouting pipeline, raw material form described synchronous slurries by described stirring of mixing slurry system 100 automatically, then described synchronous slurries are transferred to described slurry can 101, described slurry can 101 is delivered to described slurry car 102 with described synchronous slurries, described slurry car 102 transfers to chassis slurry case 103 with described synchronous slurries, and final described grouting pump 104 is annotated described synchronous slurries on the conduit wall 202 by being communicated to shield machine 201 outer grouting pipelines.
Filling system in the present embodiment has adopted brand-new PLC program to control, to satisfy the operational requirements of new synchronous grouting system.
Wherein, mix slurry system 100 automatically and contain sieve sand feed proportioning system, aggregate Hoisting System, stirring system, water system.General power is 85KW, and a slurries synchronously of the system of whenever mixing need 5 to 8 minutes, and 0.5 cubic metre every part, production capacity is per hour 10 square metres.Equipment contains the automatic gauge function, can effectively reduce human error.Slurry can 101 capacity are 4 cubic metres, are used for depositing the synchronous slurries of mixing 100 transmission of slurry system automatically and coming.Described slurry can 101 carries stirring system, can avoid synchronous slurries segregation.Then by slurry car 102 synchronous slurries are transferred to chassis slurry case 103, slurry car 102 is 5 joint marshallings in the present embodiment.Synchronous slurries are drawn in the chassis slurry case 103 this process need 10 to 12 minutes by a slurry case pump (not shown) then.Final extract synchronous slurries in the chassis slurry casees 103 by grouting pump 104, with it by on the wall of grouting pipeline (not shown) injection channel, namely inject in the slit of shield machine 201 external surfaces and the passage inboard that excavates.Each slip casting is no less than 4 cubic metres, needs 45 minutes times spent.If once can't finish grouting amount, should take the grouting program of pressurize time-delay.
Shown in the pumping cylinder quantity of grouting pump 104 be 2, and stroke is per minute 2 * 8.73 times during maximum output.Grouting pump 104 used in the present invention please refer to following form with the difference of grouting pump 104 of the prior art:
Please refer to Fig. 1, present embodiment also provides a kind of filling system, be used for injecting synchronous slurries in the process of described shield machine 201 drivings synchronously toward conduit wall 202, comprise that is mixed a slurry system 100 automatically, slurry can 101, slurry car 102, chassis slurry case 103, grouting pump 104 and grouting pipeline, the described slurry system 100 of mixing automatically is used for raw material are stirred the described synchronous slurries of formation, described slurry can 101 is used for storing the described slurry system 100 of mixing automatically and stirs the synchronous slurries that form, described slurry car 102 is used for the synchronous slurries of described slurry can 101 are transferred to described chassis slurry case 103, and described grouting pump 104 is used for described synchronous slurries are annotated conduit wall 202 by being communicated to shield machine 201 outer grouting pipelines.
In sum; the present invention is by injecting special synchronous slurries toward the conduit wall that has excavated when tunneling; after slurries solidify; can effectively control in the progradation and the ground settlement in construction later stage; in addition; second pulp feeding during by construction has prevented the settlement issues after the construction further, and the tunnel that forms for driving provides excellent protection.Solved technical problem in sandy soil, how effectively to control sedimentation phenomenon.
Claims (11)
1. job practices that shield machine passes through the house in sandy soil, it is characterized in that: in the process of described shield machine driving, constantly inject synchronous slurries by a filling system synchronously toward conduit wall, and the conduit wall of the outside, part section of jurisdiction of finishing constructing the back being laid in the construction of part section of jurisdiction at described shield machine carries out mending the second time slurry.
2. the job practices that shield machine passes through the house in sandy soil as claimed in claim 1, it is characterized in that: described synchronous slurries comprise pulverized limestone, coal ash sand, swell soil, water and water reducing agent, and nominal mix proportion is 60:400:800:70:530:2 or 70:300:930:67:540:3.
3. the job practices that shield machine passes through the house in sandy soil as claimed in claim 1, it is characterized in that: after five endless tube sheets of shield tail are deviate from the section of jurisdiction of described shield machine, begin to carry out to mend slurry the second time, before the 7th endless tube sheet is deviate from the shield tail, finish and mend slurry for the second time.
4. the job practices that shield machine passes through the house in sandy soil as claimed in claim 1 is characterized in that: when mending slurry for the second time, mending the slurry number of times is 3 to 5 times, and each volume of mending slurry is 0.7～1.05 square metre.
5. the job practices that shield machine passes through the house in sandy soil as claimed in claim 1, it is characterized in that: in the tunneling construction process of sharp radius curve, the otch soil pressure is 1.2 times to 1.3 times of theoretical pressure, and the speed of driving is 3 centimetres of per minutes.
6. the job practices that shield machine passes through the house in sandy soil as claimed in claim 1 is characterized in that: in the tunneling construction process of sharp radius curve, be provided with the ring of turning between described section of jurisdiction.
7. the job practices that shield machine passes through the house in sandy soil as claimed in claim 1, it is characterized in that: described shield machine is the radial type balancing earth-pressure shielding machine.
8. the job practices that shield machine passes through the house in sandy soil as claimed in claim 1, it is characterized in that: described filling system comprises that is mixed a slurry system automatically, slurry can, the slurry car, chassis slurry case, grouting pump and grouting pipeline, raw material form described synchronous slurries by described stirring of mixing the slurry system automatically, then described synchronous slurries are transferred to described slurry can, described slurry can is delivered to described slurry car with described synchronous slurries, described slurry car transfers to chassis slurry case with described synchronous slurries, and final described grouting pump is annotated described synchronous slurries on the conduit wall by being communicated to the outer grouting pipeline of shield machine.
9. the job practices that shield machine passes through the house in sandy soil as claimed in claim 8 is characterized in that: shown in the pumping cylinder quantity of grouting pump be 2, and stroke is per minute 2 * 8.73 times during maximum output.
10. the job practices that shield machine passes through the house in sandy soil as claimed in claim 1, it is characterized in that: the slurries during second pulp feeding are the biliquid slurry, described biliquid slurry comprises water glass solution and cement paste, water glass is 1:3 with the ratio of water in the described water glass solution, water/binder ratio is 1:1 in the described cement paste, and the volume ratio of described water glass solution and described cement paste is 1:1.
11. filling system, it is characterized in that: be used for injecting synchronous slurries in the process of described shield machine driving synchronously toward conduit wall, comprise that is mixed a slurry system automatically, slurry can, the slurry car, chassis slurry case, grouting pump and grouting pipeline, the described slurry system of mixing automatically is used for raw material are stirred the described synchronous slurries of formation, described slurry can is used for storing the described slurry system of mixing automatically and stirs the synchronous slurries that form, described slurry car is used for the synchronous slurries of described slurry can are transferred to described chassis slurry case, and described grouting pump is used for described synchronous slurries are annotated conduit wall by being communicated to the outer grouting pipeline of shield machine.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101562374A CN103244132A (en) | 2013-04-28 | 2013-04-28 | Construction method for crossing houses by aid of shield tunneling machine in sandy soil and slurry injecting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101562374A CN103244132A (en) | 2013-04-28 | 2013-04-28 | Construction method for crossing houses by aid of shield tunneling machine in sandy soil and slurry injecting system |
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Cited By (2)
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| CN105781589A (en) * | 2016-05-14 | 2016-07-20 | 中铁四局集团有限公司 | Novel grouting process suitable for pipe jacking construction in desert area |
| CN111608695A (en) * | 2020-06-05 | 2020-09-01 | 中铁二十局集团有限公司 | Shield constructs synchronous slip casting of construction and mends thick liquid system |
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| CN111608695A (en) * | 2020-06-05 | 2020-09-01 | 中铁二十局集团有限公司 | Shield constructs synchronous slip casting of construction and mends thick liquid system |
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Application publication date: 20130814 |