CN109184743A - Existing tunnel construction method is worn under circle boulder clay rock compound stratum slurry shield short distance - Google Patents

Existing tunnel construction method is worn under circle boulder clay rock compound stratum slurry shield short distance Download PDF

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Publication number
CN109184743A
CN109184743A CN201811119784.4A CN201811119784A CN109184743A CN 109184743 A CN109184743 A CN 109184743A CN 201811119784 A CN201811119784 A CN 201811119784A CN 109184743 A CN109184743 A CN 109184743A
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CN
China
Prior art keywords
construction
shield
existing tunnel
range
grouting
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
Application number
CN201811119784.4A
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Chinese (zh)
Inventor
李晓
刘东双
刘新荣
孟庆军
赵香萍
高志峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing University
China Railway 12th Bureau Group Co Ltd
2nd Engineering Co Ltd of China Railway 12 Bureau Group
Original Assignee
Chongqing University
China Railway 12th Bureau Group Co Ltd
2nd Engineering Co Ltd of China Railway 12 Bureau Group
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chongqing University, China Railway 12th Bureau Group Co Ltd, 2nd Engineering Co Ltd of China Railway 12 Bureau Group filed Critical Chongqing University
Priority to CN201811119784.4A priority Critical patent/CN109184743A/en
Publication of CN109184743A publication Critical patent/CN109184743A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining 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
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/08Lining with building materials with preformed concrete slabs
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/0607Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/08Making 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
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/093Control of the driving shield, e.g. of the hydraulic advancing cylinders

Abstract

The invention discloses existing tunnel construction method is worn under a kind of round boulder clay rock compound stratum slurry shield short distance, the construction method includes: to obtain the impacted range of existing tunnel;Grouting and reinforcing is carried out in the impacted range of the existing tunnel;Construction monitoring parameter is obtained, construction is worn in the case where the impacted range carries out, and monitored the impacted range to obtain monitoring data in real time based on the construction monitoring parameter;After wearing construction under completion is described, secondary grouting reinforcing is carried out to the impacted range based on the monitoring data.Operation is reinforced by first applying in the impacted range of existing tunnel, and it is worn in work progress under and key parameter is monitored in real time, and attended operation all is carried out to shield before construction and in work progress, to reduce the abrasion to shield, working security is improved, construction efficiency is improved.

Description

Existing tunnel construction method is worn under circle boulder clay rock compound stratum slurry shield short distance
Technical field
The invention belongs to technical field of building construction, and in particular to a kind of round boulder clay rock compound stratum slurry shield short distance Under wear existing tunnel construction method.
Background technique
With the continuous development of city size, city incity underground traffic network is increasingly intensive, therefore Urban Underground is constructed Project also becomes to become increasingly complex, and inevitably, the construction operating condition that existing tunnel is worn under newly built tunnels occurs.
Since newly built tunnels uninterruptedly excavate the persistent disturbances generated to existing tunnel, so that in existing tunnel a certain range The stability of interior country rock and the mechanical characteristic of supporting construction persistently weaken, and the accidents such as roof fall, collapsing can even occur when serious. And with the continuous development of driving technology, shield construction is because having Land-Subsidence Control is good, construction land tenure is few, the duration is controllable etc. Advantage, therefore gradually become one of the main direction of development of set of tunneling construction.
Further, it since the geological environment of high mountain and steep gorge area is special, is influenced strongly by tectonic activity of more phases time, profound tunnel Road and deep-well tunnel complex geologic conditions, geologic structure is changeable, and soft or hard stratum interaction occurs, therefore constitutes to Shield Construction Method Used Challenge.On the one hand, the engineering geology of compound stratum, hydrogeologic condition difference are big, therefore cutterhead to shield and cutter Abrasion has larger impact;On the other hand, the construction mechanics of compound stratum entirety are poor, and shield-tunneling construction is to existing tunnel and creates There are more uncertain factors for the control in tunnel, therefore safety is poor, cause biggish security risk to site operation personnel, Difficulty of construction is big simultaneously, and construction efficiency is low.
Summary of the invention
In order to overcome, there are shields during wearing the shield-tunneling construction of existing tunnel under compound stratum carries out in the prior art The technical problem that structure abrasion is big, working security is low and construction efficiency is low, it is multiple that the embodiment of the present invention provides a kind of round boulder clay rock It closes and wears existing tunnel construction method under stratum slurry shield short distance, added by first being applied in the impacted range of existing tunnel Gu operation, and worn in work progress under and key parameter is monitored in real time, to reduce the abrasion to shield, improve Working security improves construction efficiency.
To achieve the above object, existing the present invention provides being worn under a kind of round boulder clay rock compound stratum slurry shield short distance Method for tunnel construction, the construction method include: to obtain the impacted range of existing tunnel;In the impacted of the existing tunnel Grouting and reinforcing is carried out in range;Construction monitoring parameter is obtained, construction is worn in the case where the impacted range carries out, and apply based on described Work monitoring parameter monitors to obtain monitoring data the impacted range in real time;After wearing construction under completion is described, base Secondary grouting reinforcing is carried out to the impacted range in the monitoring data.
Preferably, the impacted range for obtaining existing tunnel, comprising: obtain newly built tunnels and the existing tunnel it Between range information;Obtain the construction type of the geological information and the newly built tunnels around the existing tunnel;Based on institute State the impacted range that range information, the geological information and the construction type determine the existing tunnel.
Preferably, described to carry out grouting and reinforcing in the impacted range of the existing tunnel, comprising: described impacted It is successively determined according to preset interval to slip casting ring, and described multiple to injected hole to be arranged on slip casting ring in range;Each It is described to carry out grouting operation to which injected hole section of jurisdiction is arranged in injected hole, and to the injected hole section of jurisdiction;By detecting devices to institute It states impacted range to be checked, to complete the grouting operation;Along the extension side in the tunnel in the impacted range To multiple longitudinal tension items are arranged, longitudinal tension item is set to the inner surface in the tunnel, and successively will be the multiple Longitudinal item and injected hole section of jurisdiction welding of tensing is to complete to reinforce operation, wherein longitudinal quantity for tensing item is less than single The quantity of injected hole section of jurisdiction on slip casting ring.
Preferably, after grouting and reinforcing operation, the construction method further include: drive the shield to default Tunnel location;With pressure open a position is carried out to the shield in the default tunnel location to check with the cutter to the shield; Judge whether the abrasion of the cutter is in default wear range;It is greater than the default wear range in the abrasion of the cutter In the case where, replace the cutter;Clear up the dregs of the shield excavated in storehouse.
Preferably, the construction monitoring parameter includes shield monitoring parameter and mud monitoring parameter;The shield monitoring Parameter includes excavation storehouse pressure, driving speed, gross thrust, revolving speed, torque, grouting amount, grout absorption and the pulp of the shield Amount;The mud monitoring parameter includes concentration, viscosity, yield value, sand factor, condensate rate and the pH value of mud.
Preferably, described that secondary grouting reinforcing is carried out to the impacted range based on the monitored results, comprising: to obtain The preset second pulp feeding time;The preset second pulp feeding time is adjusted based on the monitoring data, to be adjusted The second pulp feeding time after whole;Cement and waterglass are configured according to preset configuration ratio, to obtain grouting serous fluid;It will be described Grouting serous fluid carries out secondary grouting operation to the impacted range according to the second pulp feeding time after the adjustment.
Preferably, the preset configuration ratio are as follows: the mass ratio of cement and waterglass is 3:1, the water of cement and waterglass Grey ratio is 0.8-0.9.
Preferably, the construction method further include: preceding attended operation of constructing, Yi Ji are carried out to the shield before construction Real-time servicing operation is carried out to the shield according to preset period of time in work progress.
The technical solution provided through the invention, the present invention at least have the following technical effect that
Before wearing existing tunnel construction under, reinforcing operation is carried out according to the impacted range of existing tunnel, to mention The stability of the country rock around existing tunnel is risen, and is worn in work progress under and the key parameter of existing tunnel is supervised in real time Control, and carried out down wearing constructing operation according to monitored results, to reduce the abrasion to shield, working security is improved, is mentioned High construction efficiency.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Fig. 1 is that existing tunnel construction is worn under round boulder clay rock compound stratum slurry shield short distance provided in an embodiment of the present invention The specific implementation flow chart of method;
Fig. 2 is that existing tunnel construction is worn under round boulder clay rock compound stratum slurry shield short distance provided in an embodiment of the present invention The schematic diagram of slip casting ring and injected hole section of jurisdiction is set in existing tunnel in method;
Fig. 3 is that existing tunnel construction is worn under round boulder clay rock compound stratum slurry shield short distance provided in an embodiment of the present invention Longitudinal schematic diagram for tensing item is set in existing tunnel in method.
Specific embodiment
In order to overcome, there are shields during wearing the shield-tunneling construction of existing tunnel under compound stratum carries out in the prior art The technical problem that structure abrasion is big, working security is low and construction efficiency is low, it is multiple that the embodiment of the present invention provides a kind of round boulder clay rock It closes and wears existing tunnel construction method under stratum slurry shield short distance, added by first being applied in the impacted range of existing tunnel Gu operation, and worn in work progress under and key parameter is monitored in real time, to reduce the abrasion to shield, improve Working security improves construction efficiency.
It is described in detail below in conjunction with specific embodiment of the attached drawing to the embodiment of the present invention.It should be understood that this Locate described specific embodiment and be merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
Term " system " and " network " in the embodiment of the present invention can be used interchangeably." multiple " refer to two or two with On, in consideration of it, " multiple " can also be interpreted as " at least two " in the embodiment of the present invention."and/or" describes affiliated partner Incidence relation indicates may exist three kinds of relationships, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, single Solely there are these three situations of B.In addition, character "/", unless otherwise specified, typicallying represent forward-backward correlation object is a kind of "or" Relationship.In addition, it is necessary to understand, in the description of the embodiment of the present invention, the vocabulary such as " first ", " second " are only used for distinguishing The purpose of description, is not understood to indicate or imply relative importance, can not be interpreted as indication or suggestion sequence.
As shown in Figure 1, the present invention discloses and wears existing tunnel under a kind of round boulder clay rock compound stratum slurry shield short distance and apply Work method, the construction method include:
S10 the impacted range of existing tunnel) is obtained;
S20) grouting and reinforcing is carried out in the impacted range of the existing tunnel;
S30 construction monitoring parameter) is obtained, construction is worn in the case where the impacted range carries out, and be based on the construction monitoring Parameter monitors to obtain monitoring data the impacted range in real time;
S40) after wearing construction under completion is described, secondary grouting is carried out to the impacted range based on the monitoring data It reinforces.
In a kind of possible embodiment, construction personnel applies a new underground traffic tunnels A in city Work, which passes through near existing underground traffic tunnels B at a certain section, therefore causes to tunnel B Certain to influence, in the construction process, construction personnel obtains the impacted range of tunnel B first, then to the impacted model of tunnel B It encloses and carries out grouting and reinforcing operation, and start to construct to tunnel A after completing to reinforce operation, while construction personnel obtains to tunnel The construction monitoring parameter of road B is simultaneously monitored in real time, and construction personnel can be according to monitoring data tune in the work progress of tunnel A Whole construction method wears construction under completing preferably to carry out constructing operation, after wearing construction under completion, to be further ensured that tunnel The safety of road A and tunnel B, therefore carry out also according to impacted range of the monitoring data in work progress to tunnel B into one The secondary grouting of step reinforces operation.
In embodiments of the present invention, by carrying out grouting and reinforcing to existing tunnel before construction, to enhance existing tunnel The stability in road reduces newly built tunnels in the construction process to the perturbation action of existing tunnel, then wears work progress under In existing tunnel is monitored in real time, and secondary grouting is carried out to existing tunnel according to monitoring data after the completion of wear under construction It reinforces, to further increase the stability of existing tunnel, reduces newly built tunnels in the construction process to the influence of existing tunnel, Improve safety.
In embodiments of the present invention, it is described obtain existing tunnel impacted range, comprising: obtain newly built tunnels with it is described The distance between existing tunnel information;Obtain the construction class of the geological information and the newly built tunnels around the existing tunnel Type;The impacted range of the existing tunnel is determined based on the range information, the geological information and the construction type.
Further, in embodiments of the present invention, the progress slip casting in the impacted range of the existing tunnel adds Gu, comprising: it is successively determined according to preset interval to slip casting ring, and described to be arranged on slip casting ring in the impacted range It is multiple to injected hole;It is each it is described in injected hole be arranged injected hole section of jurisdiction, and to the injected hole section of jurisdiction carry out slip casting behaviour Make;The impacted range is checked by detecting devices, to complete the grouting operation;In the impacted range The multiple longitudinal tension items of extending direction setting along the tunnel, longitudinal inside table for tensing item and being set to the tunnel Face, and successively by the multiple longitudinal item and injected hole section of jurisdiction welding of tensing to complete to reinforce operation, wherein the longitudinal direction The quantity for tensing item is less than the quantity of the injected hole section of jurisdiction on single slip casting ring.
Fig. 2 is referred to, in a kind of possible embodiment, after the impacted range of existing tunnel has been determined, construction Personnel are successively determining to slip casting ring according to preset interval (such as every 5m) in the impacted range according to design requirement, and It is each multiple to injected hole (not shown) to be arranged on slip casting ring, in embodiments of the present invention, in order to guarantee optimal reinforcing effect Fruit, therefore drilled on to injected hole to which 16 injected holes are arranged on slip casting ring, such as by drilling machine to set each Set injected hole.After being provided with injected hole, injected hole section of jurisdiction is arranged in construction personnel in each injected hole, and to injected hole Section of jurisdiction carries out grouting operation, to slurries be injected in the country rock around existing tunnel, thus to the country rock around existing tunnel And the slip casting section of jurisdiction of the domain is all reinforced.Further, in order to reinforce the stability of each slip casting section of jurisdiction, also in tunnel Items are tensed in the multiple longitudinal directions of inner surface setting in tunnel along the extending direction in tunnel, and longitudinally tension item is primary and infuses by this Hole section of jurisdiction is starched to be welded to connect, so that the injected hole section of jurisdiction on same straight line is all effectively connected in the longitudinal direction, it can Stress is shared mutually, is operated with completing the reinforcing to the impacted range of existing tunnel, refers to Fig. 3.
In embodiments of the present invention, by carrying out grouting and reinforcing operation to existing tunnel before construction, to guarantee new Influence suffered by existing tunnel is preferably minimized in the work progress of built tunnel, so that the safety of existing tunnel is not affected Or the influence being subject to is substantially reduced, improve working security, while existing tunnel can be in the work progress of newly built tunnels It continues to use, is runed without stopping, therefore the operation benefits for also avoiding enterprise are affected, and improve user experience.
In embodiments of the present invention, after grouting and reinforcing operation, the construction method further include: by the shield It drives to default tunnel location;With pressure open a position with the cutter to the shield is carried out to the shield in the default tunnel location It is checked;Judge whether the abrasion of the cutter is in default wear range;It is greater than in the abrasion of the cutter described pre- If in the case where wear range, replacing the cutter;Clear up the dregs of the shield excavated in storehouse.
In actual work progress, according to the experience of construction personnel, work progress of the shield in tunneling boring shale layer In, the knife face front of shield, the mud lining at the back side are possible more serious, and flush pipe may block, and cutter may have been ground Damage, it is therefore desirable to attended operation be carried out to shield before carrying out under-traverse tunnel construction.
In a kind of possible embodiment, shield is driven to default tunnel location first and is allowed at shield by construction personnel In holding state, then construction personnel to shield carry out it is with pressure open a position and the cutter of shield checked, implement in the present invention In example, construction personnel identifies the degree of wear of different cutters, and obtains the wear rate of each cutter, construction personnel's root Whether it is in corresponding default wear range according to the wear rate of technical data or each cutter of micro-judgment, if it exists wear rate Greater than the cutter of default wear range, then the cutter is replaced immediately, and after replacement to the associated mechanisms of shield (such as Excavate in storehouse) dregs cleaning operation is carried out, to guarantee the best workability of shield.
In embodiments of the present invention, by carrying out further Maintenance and Repair operation to shield before under-traverse tunnel construction, Guarantee that shield carries out constructing operation with optimal workability, avoids leading to shield because of the segmental defect of shield in the construction process There is safety accident caused by catastrophe failure, damage of components etc. in structure, avoids interrupting work progress and drag to the construction period Prolong, improve the safety in work progress, improve construction efficiency, improves the service life of shield.
In embodiments of the present invention, the construction monitoring parameter includes shield monitoring parameter and mud monitoring parameter;Institute State excavation storehouse pressure, driving speed, gross thrust, revolving speed, torque, grouting amount that shield monitoring parameter includes the shield, into slurry Amount and slurry-outlet quantity;The mud monitoring parameter includes concentration, viscosity, yield value, sand factor, condensate rate and the PH of mud Value.
Further, in embodiments of the present invention, described that two are carried out to the impacted range based on the monitored results Secondary grouting and reinforcing, comprising: obtain the preset second pulp feeding time;When based on the monitoring data to the preset second pulp feeding Between be adjusted, with the second pulp feeding time after being adjusted;Cement and waterglass are configured according to preset configuration ratio, with Obtain grouting serous fluid;The grouting serous fluid is secondary to the impacted range progress according to the second pulp feeding time after the adjustment Grouting operation.
In embodiments of the present invention, it is preferable that the preset configuration ratio are as follows: the mass ratio of cement and waterglass is 3:1, The ratio of mud example of cement and waterglass is 0.8-0.9.
In a kind of possible embodiment, after the constructing operation for completing under-traverse tunnel, construction personnel was further to both Cunicular impacted range carries out secondary grouting reinforcing, therefore obtains the preset second pulp feeding time first, such as preset The second pulp feeding time is the 3rd, 5,7,10,15 day after shield, and construction personnel is according to the prison got in the construction process Control data are adjusted the preset second pulp feeding time, if such as monitoring the grouting amount of shield in the construction process lower than mark Quasi- grouting amount, therefore the preset second pulp feeding time is adjusted to carry out secondary benefit within the 2nd, 4,6,10,15 day after shield Slurry, then construction personnel according to the ratio of mud that the mass ratio of cement and waterglass is 3:1 and cement and waterglass be 0.85 into Row configuration grouting serous fluid, and after configuration is complete according to the second pulp feeding time adjusted to the impacted range of existing tunnel into The operation of row second pulp feeding.
In embodiments of the present invention, adjusted according to monitoring data in the construction process by after the completion of construction The second pulp feeding time carries out benefit again to the impacted range of existing tunnel and starches operation, to carry out to existing tunnel further Reinforcing, ensure that the safety of existing tunnel to greatest extent, improve the stability of existing tunnel entirety, improve construction The safety of personnel.
In embodiments of the present invention, the construction method further include: preceding maintenance of constructing is carried out to the shield before construction Operation, and real-time servicing operation is carried out to the shield according to preset period of time in the construction process.
In embodiments of the present invention, by all carrying out attended operation to shield on time before construction and in work progress, from And the service life of shield is substantially increased, the failure rate of shield is reduced, constructs and stagnates caused by reducing because of shield failure, Therefore construction efficiency is improved, improves the Personal Safety of construction personnel in work progress.
The optional embodiment of the embodiment of the present invention is described in detail in conjunction with attached drawing above, still, the embodiment of the present invention is simultaneously The detail being not limited in above embodiment can be to of the invention real in the range of the technology design of the embodiment of the present invention The technical solution for applying example carries out a variety of simple variants, these simple variants belong to the protection scope of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the embodiment of the present invention pair No further explanation will be given for various combinations of possible ways.
In addition, any combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not The thought of the embodiment of the present invention is violated, equally should be considered as disclosure of that of the embodiment of the present invention.

Claims (8)

1. wearing existing tunnel construction method under a kind of round boulder clay rock compound stratum slurry shield short distance, which is characterized in that described Construction method includes:
Obtain the impacted range of existing tunnel;
Grouting and reinforcing is carried out in the impacted range of the existing tunnel;
Construction monitoring parameter is obtained, construction is worn in the case where the impacted range carries out, and based on the construction monitoring parameter to institute Impacted range is stated to be monitored in real time to obtain monitoring data;
After wearing construction under completion is described, secondary grouting reinforcing is carried out to the impacted range based on the monitoring data.
2. construction method according to claim 1, which is characterized in that the impacted range for obtaining existing tunnel, packet It includes:
Obtain the distance between newly built tunnels and the existing tunnel information;
Obtain the construction type of the geological information and the newly built tunnels around the existing tunnel;
The impacted model of the existing tunnel is determined based on the range information, the geological information and the construction type It encloses.
3. construction method according to claim 1, which is characterized in that described in the impacted range of the existing tunnel Carry out grouting and reinforcing, comprising:
It is successively determined according to preset interval to slip casting ring, and described multiple to be arranged on slip casting ring in the impacted range To injected hole;
It is each it is described in injected hole be arranged injected hole section of jurisdiction, and to the injected hole section of jurisdiction carry out grouting operation;
The impacted range is checked by detecting devices, to complete the grouting operation;
The multiple longitudinal tension items of extending direction setting in the impacted range along the tunnel, longitudinal item that tenses are set It is placed in the inner surface in the tunnel, and successively welds the multiple longitudinal tension item and the injected hole section of jurisdiction to complete to add Gu operation, wherein longitudinal quantity for tensing item is less than the quantity of the injected hole section of jurisdiction on single slip casting ring.
4. construction method according to claim 1, which is characterized in that after grouting and reinforcing operation, the construction Method further include:
The shield is driven to default tunnel location;
With pressure open a position is carried out to the shield in the default tunnel location to check with the cutter to the shield;
Judge whether the abrasion of the cutter is in default wear range;
In the case where the abrasion of the cutter is greater than the default wear range, the cutter is replaced;
Clear up the dregs of the shield excavated in storehouse.
5. construction method according to claim 1, which is characterized in that the construction monitoring parameter includes shield monitoring parameter And mud monitoring parameter;The shield monitoring parameter includes the excavation storehouse pressure of the shield, driving speed, gross thrust, turns Speed, torque, grouting amount, grout absorption and slurry-outlet quantity;The mud monitoring parameter includes the concentration of mud, viscosity, yield value, contains Sand coarse aggregate ratio, condensate rate and pH value.
6. construction method according to claim 1, which is characterized in that described to be based on the monitored results to described impacted Range carries out secondary grouting reinforcing, comprising:
Obtain the preset second pulp feeding time;
The preset second pulp feeding time is adjusted based on the monitoring data, with after being adjusted when second pulp feeding Between;
Cement and waterglass are configured according to preset configuration ratio, to obtain grouting serous fluid;
The grouting serous fluid is subjected to secondary grouting operation to the impacted range according to the second pulp feeding time after the adjustment.
7. construction method according to claim 6, which is characterized in that the preset configuration ratio are as follows: cement and waterglass Mass ratio be 3:1, the ratio of mud example of cement and waterglass is 0.8-0.9.
8. construction method described in any claim in -7 according to claim 1, which is characterized in that the construction method is also wrapped It includes: preceding attended operation of constructing being carried out to the shield before construction, and in the construction process according to preset period of time to institute It states shield and carries out real-time servicing operation.
CN201811119784.4A 2018-09-25 2018-09-25 Existing tunnel construction method is worn under circle boulder clay rock compound stratum slurry shield short distance Pending CN109184743A (en)

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