CN108643933A - Shield receives portal reinforcement means - Google Patents

Shield receives portal reinforcement means Download PDF

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Publication number
CN108643933A
CN108643933A CN201810394516.7A CN201810394516A CN108643933A CN 108643933 A CN108643933 A CN 108643933A CN 201810394516 A CN201810394516 A CN 201810394516A CN 108643933 A CN108643933 A CN 108643933A
Authority
CN
China
Prior art keywords
portal
geological condition
grouting pipe
injection slurry
shield
Prior art date
Application number
CN201810394516.7A
Other languages
Chinese (zh)
Inventor
潘彦斌
余浩
赵香萍
屈海磊
李晓
支卫东
白云飞
郭俊林
Original Assignee
中铁十二局集团有限公司
中铁十二局集团第二工程有限公司
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 中铁十二局集团有限公司, 中铁十二局集团第二工程有限公司 filed Critical 中铁十二局集团有限公司
Priority to CN201810394516.7A priority Critical patent/CN108643933A/en
Publication of CN108643933A publication Critical patent/CN108643933A/en

Links

Classifications

    • 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
    • E21D9/14Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
    • 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
    • E21D11/38Waterproofing; Heat insulating; Soundproofing; Electric insulating
    • 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

Abstract

The embodiment of the present invention provides a kind of shield reception portal reinforcement means, including:Construction of High Pressure Jet Grouting Pile is carried out above the portal;Injected hole is set at the portal position;Grouting Pipe is installed in the injected hole;According to the geological condition of the portal, injection slurry corresponding with the geological condition is configured;Slip casting is carried out to the portal by the Grouting Pipe using injection slurry corresponding with the geological condition, to reinforce the portal.The method provided through the invention can ensure that shield starting receives safely, reduce the construction risk for percolating water of appearing, while can reduce the construction problem of later stage portal percolating water, water burst, reduce later stage grouting for water plugging and spend, save construction cost.

Description

Shield receives portal reinforcement means

Technical field

The present invention relates to Municipal Engineering Construction fields, and in particular, to a kind of shield in constructing tunnel receives portal and adds Solid method.

Background technology

It is major with the fast development of urban rail transit in China construction and stepping up for underground space utilization rate City adds subway work ranks one after another, shield method tunnel construction technology with its exclusive intelligence, safely, quickly, it is high The features such as effect and advantage are more and more widely promoted and are applied.

It before receiving shield machine, needs to take soil stabilization measure, it is ensured that the soil body at portal has good uniform Property, independence and sealing, when the soil body at portal position reaches construction regulation, shield machine can just appear.

In the prior art, before receiving shield machine, by setting rotary churning pile above portal and at portal position Method reinforces portal, but rotary churning pile pile-forming effect in layer of sand is not obvious, and non-pile, portal below portal add Gu effect is simultaneously bad, and construction cost is high.

Invention content

It is poor for shield in the prior art reception portal reinforcement means portal consolidation effect, and the technology that construction cost is high Problem, the present invention provides a kind of shields to receive portal reinforcement means, can ensure that shield starting receives safely using this method, The construction risk for percolating water of appearing is reduced, while the construction problem of later stage portal percolating water, water burst can be reduced, reduces later stage note It starches leak stopping to spend, saves construction cost.

To achieve the above object, shield provided by the invention receives portal reinforcement means and includes the following steps:In the hole Door top carries out Construction of High Pressure Jet Grouting Pile;Injected hole is set at the portal position;Grouting Pipe is installed in the injected hole; According to the geological condition of the portal, injection slurry corresponding with the geological condition is configured;Using corresponding with the geological condition Injection slurry by the Grouting Pipe to the portal carry out slip casting, to reinforce the portal.

Preferably, the injected hole set is distributed in blossom type.

Preferably, the Grouting Pipe is made of high-molecular organic material.

Preferably, multiple slurry outlets are laid in the Grouting Pipe.

Preferably, the method further includes:It installs and uses at nozzle of the Grouting Pipe towards the portal open at one end In the valve for observing the portal geological condition.

Preferably, the geological condition according to the portal configures injection slurry corresponding with the geological condition, packet It includes:When the geology of the portal be clay and with infiltration when, configuration water, cement, waterglass mixture as with described The corresponding injection slurry of matter situation;When the geology of the portal is drift sand and when with infiltration, configuration water, phosphoric acid, waterglass it is mixed Object is closed as injection slurry corresponding with the geological condition.

Preferably, the method further includes:On the inside of the portal steel loop of the portal from inside to outside respectively install wire brush, Rubber gasket sheet, support turnover panel.

Preferably, the wire brush, the rubber gasket sheet, the internal diameter for supporting turnover panel are respectively less than the interior of shield machine Diameter.

Preferably, the method further includes:Seal grease is smeared on the wire brush.

Preferably, the method further includes:The pre-buried outside Grouting Pipe on the outside of the portal.

The technical solution provided through the invention, the present invention at least have the following technical effect that:

The shield of the present invention is received portal reinforcement means and is reinforced using rotary churning pile more than portal, and water is used within the scope of portal Flat grouting and reinforcing, and the measure of shield tail sealing brush is installed in portal, it can ensure that shield starting receives safely, reduce when appearing The construction risk of percolating water, while the construction problem of later stage portal percolating water, water burst is reduced, it reduces later stage grouting for water plugging and spends, Save construction cost.

Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.

Description of the drawings

Fig. 1 is the flow chart that shield provided by the invention receives portal reinforcement means.

Specific implementation mode

The specific implementation mode of the embodiment of the present invention is described in detail below in conjunction with attached drawing.It should be understood that this The described specific implementation mode in place is merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.

It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase Mutually combination.

In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, top, bottom " is typically needle For direction shown in the drawings either for it is vertical, on vertical or gravity direction for each component mutual alignment relation Word is described.

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

Referring to FIG. 1, wearing river construction method under a kind of shallow tunnel of offer of the embodiment of the present invention, this method includes following Step:S101:Construction of High Pressure Jet Grouting Pile is carried out above the portal;S102:Injected hole is set at the portal position; S103:Grouting Pipe is installed in the injected hole;S104:According to the geological condition of the portal, configuration and the geological condition Corresponding injection slurry;S105:The portal is carried out by the Grouting Pipe using injection slurry corresponding with the geological condition Slip casting, to reinforce the portal.

In the embodiment of the present invention, using rotary churning pile is set above portal, the side of horizontal grouting is carried out at portal position Method reinforces portal:When shield machine is excavated near portal, with perpendicular to the direction of portal above portal Rotary churning pile is set in the soil body, and drilling is then positioned at portal position, sets injected hole, and Grouting Pipe is installed in injected hole. Field geology situation is analyzed again, configures injection slurry corresponding with geological condition, slip casting is carried out to portal.

The method provided through the embodiment of the present invention can ensure that shield starting receives safely, reduce percolating water of appearing Construction risk, while the construction problem of later stage portal percolating water, water burst can be reduced, it reduces later stage grouting for water plugging and spends, save Construction cost.

Preferably, the injected hole set is distributed in blossom type.

In the embodiment of the present invention, cloth hole at portal position is distributed in using blossom type, pitch of holes is 0.5 meter, blowing angle It is inclined outwardly 12 degree along center line.The bit diameter for wherein setting injected hole is 35 millimeters, and drilling depth is 4-5 meters.

Method through the embodiment of the present invention, the uniform cloth hole at portal position can ensure that injection slurry is uniform when slip casting It is distributed at portal, ensures the consolidation effect of portal.

Preferably, the Grouting Pipe is made of high-molecular organic material.

In the embodiment of the present invention, shield machine is worked as in high-molecular organic material light weight and abrasion resistance height, convenience in transport and installation When appearing, Grouting Pipe need not be removed, shield machine directly abolishes Grouting Pipe.

Method through the embodiment of the present invention need not remove Grouting Pipe again when shield machine is appeared, and can reduce Working procedure and construction time improve construction efficiency.

Preferably, multiple slurry outlets are laid in the Grouting Pipe.

In the embodiment of the present invention, multiple slurry outlets are uniformly laid in Grouting Pipe, injection slurry can be expanded by slurry outlet It is scattered in the portal soil body, to improve the intensity and sealing performance of the soil body, to have the function that waterproof, anti-mud, it is ensured that shield machine Smooth export & import.

Preferably, the method further includes:It installs and uses at nozzle of the Grouting Pipe towards the portal open at one end In the valve for observing the portal geological condition.

When carrying out slip casting to portal, need to detect the geological condition at portal, and injection slurry is configured according to geological condition, Method through the embodiment of the present invention opens valve, checks the sediment condition flowed out in Grouting Pipe before configuring injection slurry, It can be learnt that the geological condition at portal, injection slurry is configured further according to geological condition.

Method through the embodiment of the present invention can facilitate the geological condition confirmed at portal position, and observation is simple, and saves It saves time, effectively increases construction efficiency.

Preferably, the geological condition according to the portal configures injection slurry corresponding with the geological condition, packet It includes:When the geology of the portal be clay and with infiltration when, configuration water, cement, waterglass mixture as with described The corresponding injection slurry of matter situation;When the geology of the portal is drift sand and when with infiltration, configuration water, phosphoric acid, waterglass it is mixed Object is closed as injection slurry corresponding with the geological condition.

In the embodiment of the present invention, tri- kinds of slurries of A, B, C are configured with, A liquid is the portland cement of water and model 42.5 Mixture, the wherein mass ratio of the portland cement of water and model 42.5 is (1.5-2):1;B liquid is water and model The volume ratio of the mixture of the waterglass of 40Be, wherein water and the waterglass of model 40Be is 1:2;C liquid is water and a concentration of The volume ratio of the mixture of 85% phosphoric acid, wherein water and a concentration of 85% phosphoric acid is 6:1.When detecting that the geology of portal is Clay and with infiltration when, by A liquid and B liquid according to 1:1 volume ratio mixing, by Grouting Pipe to portal slip casting.When detecting The geology of portal be drift sand and with infiltration when, by B liquid and C liquid according to 1:1 volume ratio mixing is noted by Grouting Pipe to portal Slurry.

Method through the embodiment of the present invention can configure corresponding injection slurry according to geological condition, and slip casting has more needle To property, portal consolidation effect can be effectively improved, ensure that shield is smoothly appeared, and reduce appear after leakage problem.

Preferably, portal is carried out in slip casting jumping hole slip casting, while observes grouting pressure table and portal soil body surface, when When gage pressure gradually increases when reaching 1MPa or running pulp occurs in portal soil body surface, stop slip casting.

After the completion of slip casting, entire portal is divided into, neutralizes lower three parts, is not noted in the center line both sides of every part It starches and uniformly sets inspection hole at the position in hole.Preferably, upper and lower two parts respectively set four inspection holes, and middle section sets six A inspection hole, the slip casting for observing the soil body in each inspection hole are saturated closely knit situation.When flowing out clay in inspection hole with oozing When water, by A liquid and B liquid according to 1:1 volume ratio mixing, to inspection hole after-teeming injection slurry;When in inspection hole flow out drift sand with When infiltration, by B liquid and C liquid according to 1:1 volume ratio mixing, to inspection hole after-teeming injection slurry.If the soil body that inspection hole drills out is complete It is whole, illustrate that injection slurry forms solid body, then inspection hole is blocked, completes slip casting.

Method through the embodiment of the present invention can further improve slip casting effect, ensure that shield machine is smoothly appeared.

Preferably, the method further includes:On the inside of the portal steel loop of the portal from inside to outside respectively install wire brush, Rubber gasket sheet, support turnover panel.

In the embodiment of the present invention, wire brush, rubber gasket sheet, support turnover panel, Neng Goubao are installed on the inside of the steel loop of portal It demonstrate,proves shield machine to be wrapped by wire brush, rubber gasket sheet, support turnover panel when appearing, reduces percolating water when shield machine is appeared.

Preferably, the wire brush, the rubber gasket sheet, the internal diameter for supporting turnover panel are respectively less than the interior of shield machine Diameter.

In the embodiment of the present invention, wire brush, supports the internal diameter of turnover panel 20 lis smaller than the internal diameter of shield machine at rubber gasket sheet Meter or more, it can ensure that shield machine when appearing, can tightly wrap the shield body of shield machine, effectively prevent shield in this way Occurs percolating water when appearing.

Preferably, the method further includes:Seal grease is smeared on the wire brush.

In the embodiment of the present invention, it is also necessary to smear hand grease on wire brush, hand grease is rubbed into strip shape, is filled in In wire brush, layer 2-3 is smeared in overlapping from inside to outside.

Method through the embodiment of the present invention can protect wire brush, and the service life and shield for improving wire brush go out The sealing effect in hole,

Preferably, the method further includes:The pre-buried outside Grouting Pipe on the outside of the portal.

In the embodiment of the present invention, outside Grouting Pipe is also embedded with outside portal, it is uniformly distributed in the Grouting Pipe of outside to have outside Slurry outlet.It, can the ejection for water plugging to outside portal by outside Grouting Pipe if there is percolating water after shield machine is appeared.

Method through the embodiment of the present invention, the percolating water situation that can be further reduced after shield starting, avoids shield The security risk that percolating water is brought after structure is appeared, economic loss.

The preferred embodiment of the present invention is described in detail above in association with attached drawing, still, the present invention is not limited to above-mentioned realities The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical scheme of the present invention Monotropic type, these simple variants all belong to the scope of protection 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 of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can The combination of energy no longer separately illustrates.

In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally The thought of invention, it should also be regarded as the disclosure of the present invention.

Claims (10)

1. a kind of shield receives portal reinforcement means, which is characterized in that the method includes:
Construction of High Pressure Jet Grouting Pile is carried out above the portal;
Injected hole is set at the portal position;
Grouting Pipe is installed in the injected hole;
According to the geological condition of the portal, injection slurry corresponding with the geological condition is configured;
Slip casting is carried out to the portal by the Grouting Pipe using injection slurry corresponding with the geological condition, described in reinforcing Portal.
2. according to the method described in claim 1, it is characterized in that, the injected hole set is distributed in blossom type.
3. according to the method described in claim 1, it is characterized in that, the Grouting Pipe is made of high-molecular organic material.
4. according to the method described in claim 1, it is characterized in that, being laid with multiple slurry outlets in the Grouting Pipe.
5. according to the method described in claim 1, it is characterized in that, the method further includes:
Valve of the installation for observing the portal geological condition at nozzle of the Grouting Pipe towards the portal open at one end Door.
6. according to the method described in claim 1, it is characterized in that, the geological condition according to the portal, configuration and institute The corresponding injection slurry of geological condition is stated, including:
When the geology of the portal be clay and with infiltration when, configuration water, cement, waterglass mixture as with described The corresponding injection slurry of matter situation;
When the geology of the portal be drift sand and with infiltration when, configuration water, phosphoric acid, waterglass mixture as with described The corresponding injection slurry of matter situation.
7. according to the method described in claim 6, it is characterized in that, the method further includes:
Wire brush, rubber gasket sheet, support turnover panel are installed respectively from inside to outside on the inside of the portal steel loop of the portal.
8. the method according to the description of claim 7 is characterized in that the wire brush, the rubber gasket sheet, it is described support turn over The internal diameter of plate is respectively less than the internal diameter of shield machine.
9. according to the method described in claim 8, it is characterized in that, the method further includes:
Seal grease is smeared on the wire brush.
10. according to the method described in claim 1, it is characterized in that, the method further includes:
The pre-buried outside Grouting Pipe on the outside of the portal.
CN201810394516.7A 2018-04-27 2018-04-27 Shield receives portal reinforcement means CN108643933A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109707394A (en) * 2018-12-17 2019-05-03 同济大学 A kind of construction method for subway tunnel shield receiving end portal
CN109826635A (en) * 2019-03-08 2019-05-31 中铁十二局集团有限公司 Reinforce the construction method for the shield reception space periphery soil body that subsurface excavation method applies

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CN107676097A (en) * 2017-08-27 2018-02-09 中铁十二局集团有限公司 A kind of high hydraulic pressure soft soil layer HFE composite shield originating methods
CN207063998U (en) * 2017-08-27 2018-03-02 中铁十二局集团第二工程有限公司 A kind of external mounted shield launching portal hermetic seal device
CN107762522A (en) * 2017-11-03 2018-03-06 中国水利水电第十四工程局有限公司 A kind of pipe ring butt joint auxiliary device and the method for changing shield tail brush

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CN107676097A (en) * 2017-08-27 2018-02-09 中铁十二局集团有限公司 A kind of high hydraulic pressure soft soil layer HFE composite shield originating methods
CN207063998U (en) * 2017-08-27 2018-03-02 中铁十二局集团第二工程有限公司 A kind of external mounted shield launching portal hermetic seal device
CN107762522A (en) * 2017-11-03 2018-03-06 中国水利水电第十四工程局有限公司 A kind of pipe ring butt joint auxiliary device and the method for changing shield tail brush

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109707394A (en) * 2018-12-17 2019-05-03 同济大学 A kind of construction method for subway tunnel shield receiving end portal
CN109826635A (en) * 2019-03-08 2019-05-31 中铁十二局集团有限公司 Reinforce the construction method for the shield reception space periphery soil body that subsurface excavation method applies
CN109826635B (en) * 2019-03-08 2020-09-15 中铁十二局集团有限公司 Construction method for reinforcing shield receiving space peripheral soil body constructed by subsurface excavation method

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