CN110331982A - It is a kind of pass through karst region overlying sand shield tunnel protection construction and method - Google Patents
It is a kind of pass through karst region overlying sand shield tunnel protection construction and method Download PDFInfo
- Publication number
- CN110331982A CN110331982A CN201910611102.XA CN201910611102A CN110331982A CN 110331982 A CN110331982 A CN 110331982A CN 201910611102 A CN201910611102 A CN 201910611102A CN 110331982 A CN110331982 A CN 110331982A
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- shield tunnel
- slip casting
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- 238000010276 construction Methods 0.000 title claims abstract description 71
- 239000004576 sand Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims description 16
- 238000007569 slipcasting Methods 0.000 claims abstract description 44
- 239000011435 rock Substances 0.000 claims abstract description 12
- 230000007480 spreading Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000005755 formation reaction Methods 0.000 abstract description 3
- 230000002085 persistent effect Effects 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 abstract description 2
- 238000005192 partition Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 24
- 239000004744 fabric Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000035800 maturation Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
- E21F15/04—Stowing mats; Goaf wire netting; Partition walls
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of shield tunnel protection constructions for passing through karst region overlying sand; it is characterized by: its application environment be on cover for the Karst Collapse Area of layer of sand (1), the shield tunnel protection construction for passing through karst region overlying sand includes: completely to spread slip casting band (6) between divider wall (4), wall bottom grouting curtain (5), wall；By the way that divider wall is arranged to shield tunnel two sides, and slip casting is carried out to partition wall wall lower part and is formed every seeping curtain, in addition the soluble rock between tunnel divider wall carries out full paving formula slip casting, fills to the solution cavity of tunnel lower part.The safeguard measure; solution cavity is filled; improve the intensity of solution cavity inner stuffing; meet the bearing capacity of persistent tunnel structure; tunnel is isolated with surrounding formations, has obstructed inside and outside hydraulic connection, avoids the occurrence of the risk collapsed; it ensure that the shield tunnel construction phase and run the safety of phase, influencing each other between engineering on the outside of tunnel and isolation pile or wall has been isolated.
Description
Technical field
The invention belongs to shield tunnel fields, and in particular to a kind of shield tunnel protection structure for passing through karst region overlying sand
It makes and method.
Background technique
Country's subway sectional tunnel is passed through in karst region at present, and most of situation is that soluble rock top is sticky soil
Layer, non-arenaceous stratum is not in the problem that collapses of karst region, and general karst treatment scheme is only a certain range of to tunnel molten
Hole carries out fill-type processing, can meet shield-tunneling construction and operation phase tunnel structure security needs.
It is used for subsidence area according to the karst treatment scheme of non-Karst Collapse Area, only a certain range of solution cavity in tunnel is carried out
Filling treatment remains to the displacement for causing tunnel big and damage in the Karst Collapse Area of untreated areas, cannot ensure tunnel structure
Safety, consequence will be catastrophic.
Summary of the invention
Shield tunnel crossing construction in soluble rock overlying sand can cause penetrating ground in tunneling process very big
Disturbance, layer of sand can flow into soluble karst cave, cause ground subsidence, while shield machine being caused to kowtow or left and right deviation middle line
Accident, the difficulty rectified a deviation again is big, and may cause tunnel axis transfinites, be unable to satisfy design driving operation limit requirement.
So the quality of karst treatment directly determines shield-tunneling construction and the safety of tunnel operation stage.
For at least one of prior art the above defects or improvement requirements, for the Karst Collapse Area above covered for layer of sand
Shield tunnel situation, the invention proposes a kind of safely and effectively karst treatment protection construction and methods, i.e., shield-tunneling construction it
It is preceding that divider wall (stake+waterproof between piles curtain or diaphragm wall) is arranged to shield tunnel two sides, and slip casting shape is carried out to divider wall lower part
At every seeping curtain, full paving formula slip casting in addition is carried out to the soluble rock between the divider wall of tunnel two sides, to the solution cavity of tunnel lower part
It is filled.
The protecting tunnel measure of this kind of Karst Collapse Area, fills solution cavity, improves the strong of solution cavity inner stuffing
Degree, meets the bearing capacity of persistent tunnel structure, is isolated to tunnel with surrounding formations, has obstructed inside and outside hydraulic connection,
The risk collapsed is avoided the occurrence of, ensure that the shield tunnel construction phase and runs the safety of phase, has been isolated on the outside of tunnel and divider wall
Influencing each other between engineering.
To achieve the above object, according to one aspect of the present invention, a kind of shield for passing through karst region overlying sand is provided
Structure protecting tunnel construction, application environment be on cover Karst Collapse Area for layer of sand, the shield for passing through karst region overlying sand
Structure protecting tunnel construction includes: completely to spread slip casting band between divider wall, wall bottom grouting curtain, wall；Wherein,
The divider wall is located in the layer of sand of shield tunnel two sides, for obstructing inside and outside layer of sand and inside and outside hydraulic connection；
Wall bottom grouting curtain is located at the divider wall bottom, in basement rock, is used as and is formed every seeping curtain；
Slip casting band is completely spread between multiple walls on the inside of divider wall described in twice, is located at the layer of sand and the basement rock
In, to fill the solution cavity of the tunnel bottom.
Preferably, the wall overhead height of the divider wall, which is higher than, collapses influence line.
Preferably, the divider wall is made of stake and waterproof between piles curtain.
Preferably, the divider wall is diaphragm wall.
Preferably, the divider wall and wall bottom grouting curtain are integrally formed after having constructed.
To achieve the above object, it is another aspect of this invention to provide that additionally providing a kind of karst region overlying sand of passing through
The construction method of shield tunnel protection construction, includes the following steps:
Step 1, the construction of wall bottom grouting curtain:
It arranges that several row's injected holes, slip casting hole depth pass through Karst Area according to karsts developing area situation, blocks inside and outside water
Power connection, fills wall bottom solution cavity, it is ensured that solution cavity filling is closely knit；
Step 2, the construction of divider wall:
First determine construction location and wall top height, then in the top of wall bottom grouting curtain, the two sides of shield tunnel to be onstructed
In layer of sand, construction forms divider wall, is integrally formed with wall bottom grouting curtain；
Step 3 completely spreads slip casting band and filling construction between wall:
Slip casting band is completely spread between constructing wall to karst region from layer of sand between twice divider wall, full paving slip casting is carried out, with filling
Solution cavity existing for tunnel bottom.
Preferably, in said step 1, injected hole pitch-row is determined according to geology prospecting results, and use quincunx cloth
Hole.
Preferably, in the step 2, it is determined according to the design altitude of shield tunnel, trend and periphery construction environment
Construction location collapses the wall top height that angle calculates determining divider wall in conjunction with layer of sand.
Preferably, in the step 3, the slip casting hole density that slip casting band is completely spread between wall is determined according to karsts developing area situation,
Slip casting hole depth need to reach exploration discovery solution cavity bottom.
Preferably, the depth of wall bottom grouting curtain is greater than the depth for completely spreading slip casting band between the wall.
Above-mentioned preferred feature can be combined with each other as long as they do not conflict with each other.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, have below beneficial to effect
Fruit:
1, the shield tunnel protection construction for passing through karst region overlying sand of the invention and method, by shield tunnel two
Divider wall is arranged in side, and carries out slip casting to partition wall wall lower part and formed every seeping curtain, in addition the solubility between tunnel divider wall
Rock carries out full paving formula slip casting, fills to the solution cavity of tunnel lower part.The protecting tunnel measure of this kind of Karst Collapse Area, to solution cavity
It is filled, improves the intensity of solution cavity inner stuffing, meet the bearing capacity of persistent tunnel structure, to tunnel and surrounding formations
It is isolated, has obstructed inside and outside hydraulic connection, avoid the occurrence of the risk collapsed, ensure that shield tunnel construction phase and operation
Influencing each other between engineering on the outside of tunnel and isolation pile or wall has been isolated in the safety of phase.
2, the of the invention shield tunnel protection construction for passing through karst region overlying sand and method, very good solution shield
Construction time and operation phase are likely to occur layer of sand and collapse the catastrophic risk of leakage, and guard method reliable in quality, it is convenient to construct, and safety passes through
Ji.
3, the of the invention shield tunnel protection construction for passing through karst region overlying sand and method, the program is simple and easy to do,
Economical rationality, technology maturation, have a extensive future, benefit it is good.
Detailed description of the invention
Fig. 1 is the schematic diagram of the shield tunnel protection construction for passing through karst region overlying sand of the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.The present invention is described in more detail With reference to embodiment.
As a kind of better embodiment of the invention, as shown in Figure 1, the present invention, which provides one kind and passes through, covers sand on karst region
The shield tunnel of layer protects construction, including moving towards to be set to the divider wall 4 of its two sides along shield tunnel 3, being located at 4 bottom of divider wall
Wall bottom grouting curtain 5, completely spread slip casting band 6 between multiple walls between twice divider wall 4.
Wherein, divider wall 4 is located in 3 two sides layer of sand 1 of shield tunnel, according to 3 design altitude of shield tunnel, trend and periphery
Construction environment determines construction location, collapses the wall top height that angle calculates determining divider wall 4 in conjunction with layer of sand, wall overhead height is slightly higher
In collapsing influence line, guarantee to impact tunnel when collapsing outside wall.Wall bottom grouting curtain 5 is located at 4 bottom of divider wall
Portion constructs prior to divider wall 4, arranges that 2~3 row's injected holes, slip casting hole depth pass through Karst Area according to karsts developing area situation
(determining injected hole pitch-row, quincunx cloth hole according to geology prospecting results) blocks inside and outside hydraulic connection, fills wall bottom solution cavity, really
It is closely knit to protect solution cavity filling, improves bearing capacity, divider wall 4 and wall bottom grouting curtain 5 are integrally formed after the completion of construction.Curtain-grouting is
A kind of slurry injection technique is that the slurries that will be solidified with hydraulic or air pressure pass through ad hoc inlet well, force feed by the concentration of design
Into defined rock-soil layer, the crack in Rock And Soil or hole are filled up, it is intended to improve the physico-mechanical properties of slip casting object, with full
The needs of all kinds of engineerings of foot.
Full paving slip casting is carried out to the basement rock 2 between twice divider wall 4 and improves base to fill solution cavity existing for tunnel bottom
Rock bearing capacity, slip casting hole density determine that slip casting hole depth need to reach exploration discovery solution cavity bottom according to karsts developing area situation.It is complete
After whole slip castings and passed examination, shield tunnel construction can be started.
The present invention is handled by the shield-tunneling construction ground to karst area, including to 3 two sides sand of shield tunnel
Layer is obstructed, and carries out slip casting to the solution cavity in tunnel coverage, improves foundation bearing capacity, while obstructing inside and outside waterpower connection
System carries out full paving injecting treatment to karst below tunnel, it is ensured that constructing tunnel, operational process safety.
The construction method of the shield tunnel protection construction for passing through karst region overlying sand of the invention, includes the following steps:
Step 1, the construction of wall bottom grouting curtain 5:
Arrange that several row's injected holes, slip casting hole depth pass through Karst Area according to geologic prospect according to karsts developing area situation
As a result determine that injected hole pitch-row, quincunx cloth hole block inside and outside hydraulic connection, fill wall bottom solution cavity, it is ensured that solution cavity filling is closely knit；
Step 2, the construction of divider wall 4:
First determine construction location and wall top height, then the top of wall bottom grouting curtain 5, shield tunnel to be onstructed 3 two
In side layer of sand 1, construction forms divider wall 4, is integrally formed with wall bottom grouting curtain 5；
Step 3 completely spreads slip casting band 6 and filling construction between wall:
Slip casting band 6 is completely spread between construction wall from layer of sand 1 to karst region between twice divider wall 4, full paving slip casting is carried out, to fill out
Fill solution cavity existing for tunnel bottom.After completing whole slip castings and passed examination, shield tunnel construction can be started.
Preferably, in said step 1, injected hole pitch-row is determined according to geology prospecting results, and use quincunx cloth
Hole.
Preferably, in the step 2, according to the design altitude of shield tunnel 3, trend and periphery construction environment come really
Determine construction location, collapses the wall top height that angle calculates determining divider wall 4 in conjunction with layer of sand.
Preferably, in the step 3, the slip casting hole density that slip casting band 6 is completely spread between wall is true according to karsts developing area situation
Fixed, slip casting hole depth need to reach exploration discovery solution cavity bottom.
Preferably, the depth of wall bottom grouting curtain 5 is greater than the depth for completely spreading slip casting band 6 between the wall.
The of the invention shield tunnel protection construction for passing through karst region overlying sand and method, very good solution shield are applied
Duration and operation phase are likely to occur layer of sand and collapse the catastrophic risk of leakage, guard method reliable in quality, convenient, safety economy of constructing.
The shield tunnel protection construction for passing through karst region overlying sand of the invention and method, the program is simple and easy to do, passes through
Ji rationally, technology maturation, have a extensive future, benefit it is good.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (10)
1. it is a kind of pass through karst region overlying sand shield tunnel protection construction, it is characterised in that: its application environment be on cover for
The Karst Collapse Area of layer of sand (1), the shield tunnel protection construction for passing through karst region overlying sand includes: divider wall (4), wall
Slip casting band (6) are completely spread between bottom grouting curtain (5), wall；Wherein,
The divider wall (4) is located in shield tunnel (3) two sides layer of sand (1), for obstructing inside and outside layer of sand and inside and outside waterpower connection
System；
Wall bottom grouting curtain (5) is located at the divider wall (4) bottom, in basement rock (2), is used as and is formed every seeping curtain；
Slip casting band (6) are completely spread between multiple walls on the inside of divider wall (4) described in twice, are located at the layer of sand (1) and described
In basement rock (2), to fill the solution cavity of the tunnel (3) bottom.
2. passing through the shield tunnel protection construction of karst region overlying sand as described in claim 1, it is characterised in that:
The wall overhead height of the divider wall (4), which is higher than, collapses influence line.
3. passing through the shield tunnel protection construction of karst region overlying sand as described in claim 1, it is characterised in that:
The divider wall (4) is made of stake and waterproof between piles curtain.
4. passing through the shield tunnel protection construction of karst region overlying sand as described in claim 1, it is characterised in that:
The divider wall (4) is diaphragm wall.
5. passing through the shield tunnel protection construction of karst region overlying sand as described in claim 1, it is characterised in that:
The divider wall (4) and wall bottom grouting curtain (5) are integrally formed after having constructed.
6. a kind of construction of the shield tunnel protection construction as described in any one in claim 1-5 for passing through karst region overlying sand
Method, which comprises the steps of:
Step 1, the construction of wall bottom grouting curtain (5):
It arranges that several row's injected holes, slip casting hole depth pass through Karst Area according to karsts developing area situation, blocks inside and outside waterpower connection
Wall bottom solution cavity is filled by system, it is ensured that solution cavity filling is closely knit；
Step 2, the construction of divider wall (4):
First determine construction location and wall top height, then the top of wall bottom grouting curtain (5), shield tunnel to be onstructed (3) two
In side layer of sand (1), construction forms divider wall (4), is integrally formed with wall bottom grouting curtain (5)；
Step 3 completely spreads slip casting band (6) and filling construction between wall:
Slip casting band (6) are completely spread between construction wall from layer of sand (1) to karst region between twice divider wall (4), carry out full paving slip casting, with
Fill solution cavity existing for tunnel bottom.
7. passing through the construction method of the shield tunnel protection construction of karst region overlying sand, feature as claimed in claim 6
It is:
In said step 1, injected hole pitch-row is determined according to geology prospecting results.
8. passing through the construction method of the shield tunnel protection construction of karst region overlying sand, feature as claimed in claim 6
It is:
In the step 2, construction position is determined according to the design altitude of shield tunnel (3), trend and periphery construction environment
It sets, collapses the wall top height that angle calculates determining divider wall (4) in conjunction with layer of sand.
9. passing through the construction method of the shield tunnel protection construction of karst region overlying sand, feature as claimed in claim 6
It is:
The slip casting hole density that slip casting band (6) is completely spread in the step 3, between wall is determining according to karsts developing area situation, slip casting hole depth
Degree need to reach exploration discovery solution cavity bottom.
10. passing through the construction method of the shield tunnel protection construction of karst region overlying sand, feature as claimed in claim 9
It is:
The depth of wall bottom grouting curtain (5) is greater than the depth for completely spreading slip casting band (6) between the wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910611102.XA CN110331982B (en) | 2019-07-08 | 2019-07-08 | Shield tunnel protection device and method for penetrating through sand coating on karst region |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910611102.XA CN110331982B (en) | 2019-07-08 | 2019-07-08 | Shield tunnel protection device and method for penetrating through sand coating on karst region |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110331982A true CN110331982A (en) | 2019-10-15 |
| CN110331982B CN110331982B (en) | 2023-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910611102.XA Active CN110331982B (en) | 2019-07-08 | 2019-07-08 | Shield tunnel protection device and method for penetrating through sand coating on karst region |
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| Country | Link |
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| CN (1) | CN110331982B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111997620A (en) * | 2020-07-28 | 2020-11-27 | 中铁第四勘察设计院集团有限公司 | Grouting construction system and method for karst collapse area |
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| CN110331982B (en) | 2023-09-26 |
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