CN206337474U - The slip casting structure of covered karst embankment - Google Patents
The slip casting structure of covered karst embankment Download PDFInfo
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- CN206337474U CN206337474U CN201621270147.3U CN201621270147U CN206337474U CN 206337474 U CN206337474 U CN 206337474U CN 201621270147 U CN201621270147 U CN 201621270147U CN 206337474 U CN206337474 U CN 206337474U
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- slip casting
- karst
- embankment
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- roadbed
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Abstract
The utility model discloses a kind of slip casting structure of covered karst embankment, including embankment roadbed, it is arranged in the pilot hole of embankment roadbed two bottom sides side slope toe, it is arranged in the injected hole of embankment roadbed top both sides curb, wherein, the embankment roadbed is by clay layer, layer of sand, the ternary structural that limestone is constituted from top to bottom, the molten chamber of karst that the substrate of the embankment roadbed has area larger, the pilot hole is arranged on around the molten chamber of karst, the injected hole directly gos deep into the molten chamber of karst, steel sleeve is installed in the injected hole, the steel sleeve is joined directly together by mounting flange with Grouting Pipe, the Grouting Pipe other end is connected with slip casting machine.The utility model is positioned over type karsts developing area location for existing railway line roadbed and provides a kind of slip casting structure of covered karst embankment, trigger settlement of subgrade, unstability to solve karst corrosion, the geological hazards such as collapse, safe environment is provided for the normal operation of existing railway line.
Description
Technical field
The utility model is related to grouting process technical field, more particularly to a kind of slip casting knot of covered karst embankment
Structure.
Background technology
Covered karst can lava by the 4th be rickle covering, coating is thin, and thickness is generally less than 30m, roadbed
Bearing capacity is low.In existing railway line is open to traffic, effect of the covered karst roadbed in train load and additional load
Under can cause karst collapse, very big threat is brought to railway security.
The diadactic structure that covered karst coating is made up of silty clay and sand, solution cavity is without charges, limestone crack
Development, the fluctuating of erosion basis so that underground water flow in crack, pair can lava corrosion strengthen, Karst roof
Unstable, upper strata top board, which is easily dissoluted, to be pierced.Surface water and groundwater along the hole of basement rock, crack and aspect from high water head to
Low water head seepage flow, continuous corrosion carbonatite formation solution cavity fluid bowl, forms corrosion fissure passage, at the same time, also to the sand on upper strata
Layer and clay layer carry out latent erosion, cause overburden layer to be handled upside down, empty, so as to be formed under upper subbase substrate in soil layer empty
Hole, soil cave, and then aggravate karst and soil cave development at the native rock interface of the geological model.Can be by the upper strata of latent erosion in solution cavity
The loose material such as layer of sand and clay layer is filled, and intensity is very low, and railway bed can be caused to sink, collapse in the presence of Train induced load
Fall into.Therefore this parakarst must be handled, to reach the requirement for bearing capacity of roadbed design.
Traditional embankment Karst grouting typically uses floral tube slip casting to form separation layer to prevent karst from continuing corrosion development, by
Uncontrollable slurries are in the dispersal direction of underground during slip casting, and slurries are difficult to control to, and cause running pulp grout serious, to existing
Railway line influence is larger；If either underground has the molten chamber of karst, slurries cannot be introduced into the molten chamber of karst, and slip casting effect is bad,
Even due on this line segment roadbed covered karst overburden layer by a large amount of corrosions and emptied, cavity, soil cave and crack it is more, by
This triggers road bed sedimentation, collapsed.
Utility model content
The utility model is positioned over type karsts developing area location for existing railway line roadbed and provides a kind of covered karst
The slip casting structure of embankment, triggers settlement of subgrade, unstability to solve karst corrosion, the geological hazards such as collapses, be
The normal operation of existing railway line provides the environment of safety.
The technical scheme that the utility model is used for：
A kind of slip casting structure of covered karst embankment, including embankment roadbed, it is arranged in embankment roadbed two bottom sides side slope
The pilot hole of toe, the injected hole for being arranged in embankment roadbed top both sides curb, the substrate of the embankment roadbed have the molten chamber of karst,
The pilot hole is arranged on around the molten chamber of karst, and the injected hole directly gos deep into the molten chamber of karst.
Preferably, the road bed of embankment 1 is two-wire or yard-and-station roadbed, the embankment roadbed is wrapped successively from top to bottom
Include the ternary structural that clay layer 9, layer of sand 10, limestone 15 are constituted.
Preferably, the spacing 6m between the pilot hole, pierces limestone depth for 5~8m.
Preferably, the pilot hole injected hole in limestone table plane into plum blossom hole interlaced arrangement, spacing is 5~6m.
Preferably, being provided with steel sleeve in the injected hole, the steel sleeve is straight with Grouting Pipe by mounting flange
Connect connected, the Grouting Pipe other end is connected with slip casting machine 16.
Preferably, the injected hole includes slip casting straight hole and slip casting inclined hole, slip casting straight hole and the interspersed arrangement of slip casting inclined hole.
Preferably, the curb interplanar spacing between the slip casting straight hole and slip casting inclined hole is 3m, slip casting straight hole and slip casting
Inclined hole pierces limestone depth for 5~8m.
Preferably, the slip casting inclined hole is arranged on below grey scar to first layer solution cavity position.
Preferably, the steel sleeve and the closely connected tight of injected hole, steel sleeve bottom enter the molten chamber of karst, top is exposed
10~12cm of earth's surface.
Compared with prior art, the utility model has the advantages that：
1st, the utility model is the inverse process for simulating karsts developing area, and energy economical and efficient prevents karst from further developing, filled
The established weak link of karsts developing area, it is ensured that the ground safety of existing railway.
2nd, the utility model is setting pilot hole and as drilling verification hole (by way of i.e. using " visit to fill and combine "), entering
Row more accurately analyzes the Regional karst situation, so that it is determined that the grouting program of optimal injected hole.
3rd, the utility model by slip casting straight hole, the slip casting of slip casting inclined hole and is fed directly to karst with reference to steel sleeve by slurries
Region, slip casting is more targeted, it is possible to reduce slurry flow and pressure loss, and slip casting effect significantly, is filled by slip casing by pressure
The molten chamber of karst is filled out, the upper overburden layer soil cave of slurry filling and crack, the previously hole being effectively filled with molten chamber and quilt are returned by pressure
Latent erosion and cavity, soil cave and the crack washed away, have blocked the passage that karst is further developed.
4th, the scheme that the utility model use has pressure grouting and pressure to return slurry filling reduces the compressibility of subgrade soils, effectively
Stratum anti-permeability performance is improved, underground water submarine erosion action is enclosed, roadbed is eliminated and produces differential settlement and the geology collapsed
Condition.
Brief description of the drawings
Fig. 1 is the utility model covered karst subgrade strengthening schematic cross-sectional view；
Fig. 2 is road bed pilot hole and injected hole horizontal layout schematic diagram in the utility model embodiment；
Fig. 3 is limestone table plane pilot hole and injected hole arrangement schematic diagram in the utility model embodiment；
Shown in figure：1st, embankment roadbed；2nd, side slope toe；3rd, pilot hole；4th, curb；5th, slip casting straight hole；6th, slip casting inclined hole；
7th, the molten chamber of karst；8th, crack passage；9th, clay layer；10th, layer of sand；11st, central lines of track；12nd, steel sleeve；13rd, soil cave；14th, it is native
One rock interface；15th, limestone；16th, slip casting machine；17th, mounting flange；18th, Grouting Pipe.
Embodiment
In order that the purpose, technical scheme and advantage of the utility model embodiment are clearer, below in conjunction with this practicality
Technical scheme in new embodiment carries out clear, complete description, it is clear that described embodiment is portion of the present utility model
Divide embodiment, rather than whole embodiments.Based on embodiment of the present utility model, those of ordinary skill in the art are not paying
The every other embodiment obtained on the premise of creative work, belongs to protection domain of the present utility model.
As shown in figure 1, the utility model embodiment provides a kind of slip casting structure of covered karst embankment, including embankment road
Base 1, the pilot hole 3 for being arranged in the two bottom sides side slope toe 2 of embankment roadbed 1, it is arranged in the top both sides curb 4 of embankment roadbed 1
Injected hole, wherein, the embankment roadbed is the ternary structural being made up of from top to bottom clay layer 9, layer of sand 10, limestone 15, described
The molten chamber 7 of karst that the substrate of embankment roadbed 1 has area larger, the pilot hole 3 is arranged on around the molten chamber 7 of karst, the note
Slurry hole is directly goed deep into being provided with steel sleeve 12 in the molten chamber 7 of karst, the injected hole, and the steel sleeve 12 passes through mounting flange 17
It is joined directly together with Grouting Pipe 18, the other end of Grouting Pipe 18 is connected with slip casting machine 16.
Work progress of the present utility model is as follows：
Step 1,
Karst regional extent, depth and Karst Features are determined by engineering geophysics, the arrangement model for determining pilot hole 3 is used as
Enclose, the basis of spacing and depth.
Step 2,
According to determined by engineering geophysics karst regional extent, depth and Karst Features come determine pilot hole 3 arrangement scope,
Spacing and depth.Carried out by the way of " visit to fill and combine ", pilot hole 3 is set and drilling verification hole is used as.
As shown in Fig. 2 to 3, a row is respectively set in the both sides side slope toe 2 of existing double railway lines karst regional extent embankment roadbed 1
Pilot hole 3, spacing 6m.Completion of Drilling Hole technique is implemented by prospecting standard to each pilot hole 3, basement rock (limestone) 15 is pierced deep
Spend for 5~8m.Require to extract core sample by engineering drilling and prospecting and work out block diagram, there is provided rock by laboratory test
Native physico-mechanical properties, detects karsts developing area situation, is that subgrade stability evaluation and the molten risk analysis of chamber 7 of karst provide ginseng
Number.
Step 3,
The form of geology and geomorphology and karst is determined according to the core morphological data of collection, injected hole bore process and note is determined
Slurry scheme, mainly including range of grouting, parameter and technique.
As the preferred of the present embodiment, slip casting is implemented in the drilling to pilot hole 3, formed after the completion of slip casting in roadbed both sides every
From structure, on the one hand the structure plays reinforcing road bed effect, on the other hand can play prevention in follow-up injected hole grouting process
The effect that slurries are escaped.
Step 4,
Injected hole arrangement and drilling are carried out according to the Karst Features of detection：As shown in Fig. 1 to 2, on karst reinforcing area road
Injected hole arrangement and Completion of Drilling Hole are carried out on dike both sides curb 4.
As the preferred of the present embodiment, determined according to Karst Features in the range of the surface plane of limestone 15 between the arrangement of injected hole
Away from, be 5~6m, as shown in figure 3, injected hole, pilot hole in the table plane of limestone 15 into plum blossom hole interlaced arrangement.
As the preferred of the present embodiment, the injected hole includes slip casting straight hole 5 and slip casting inclined hole 6, as shown in figure 3, slip casting
Straight hole 5 is with the interspersed arrangement of slip casting inclined hole 6, and the curb Earth surface plane spacing between slip casting straight hole 5 and slip casting inclined hole 6 is 3m, slip casting
Hole (including slip casting straight hole 5 and slip casting inclined hole 6) pierces the depth of limestone 15 for 5~8m, such as karst, then hole depth should under to solution cavity bottom
Plate.Described slip casting inclined hole 6 is that, in the rat holing of both sides curb 4 to roadbed substrate karst―fractured zone, existing roadbed slip casting is oblique
The slip casting of hole 6 has more specific aim, and inclined hole design considerations should include tendency, inclination angle, hole depth, can be according to the molten chamber region of karst, road
Dike width, depth of fill, overburden cover determine the tendency of inclined hole, inclination angle, hole depth.Hole depth should be met below the face of limestone 15 extremely
First layer solution cavity position, pierces the face vertical depth of limestone 15 not less than 5m.
Step 5,
Steel sleeve 12 is installed in injected hole：Implement the follow-up of steel sleeve complete opening in injected hole boring procedure to install, the steel
Sleeve pipe and the closely connected tight in stratum, aperture, which has in disturbance depth bounds, pours water cement mortar so that closely knit between steel sleeve 12 and stratum
It is seamless.The bottom of steel sleeve 12 enters the molten chamber of karst, and 10~12cm of earth's surface is exposed on top.For the ease of steel sleeve 12 recovery and
Utilize, be brushed with oil-based liquid in the outside of steel sleeve 12 in advance.
As the preferred of the present embodiment, on the one hand the steel sleeve 12 causes drilling, on the other hand in slip casting process
In the molten region of chamber 7 of karst is transferred directly to by steel sleeve 12 in order to slurry pressure, reduce slurry pressure and slurry flow
Loss, is efficiently solved and is directly difficult to control to using Grouting Pipe grouting serous fluid, the larger problem of grouting amount, it is to avoid ground fractures
Grout and protuberance phenomenon, while slurries can be preferably controlled during slip casting in the dispersal direction of underground, to existing railway line shadow
Sound is smaller.
Step 6,
Injected hole has pressure grouting：The one end of Grouting Pipe 18 is connected into slip casting machine 16, the other end passes through connection method with steel sleeve 12
Blue disk 17 is closely connected, and carries out slip casting, has mud jacking liquid to be fed directly to the molten region of chamber 7 of karst, filling and glue by steel sleeve 12
Tie the latent erosion soil cave 13 near the molten chamber 7 of karst, corrosion fissure passage 8 and the native rock interface 14 in stratum and space.There is pressure
Slurries filled the molten chamber of karst, cavity after by pressure return slurry along the weak links such as corrosion fissure passage 8 to soil cave 13, space,
Crack is filled, have mud jacking liquid will constantly from the bottom up permeate filling upper strata clay layer 9 and layer of sand 10 in previously by it is latent erosion and
The soil cave 13 washed away and crack, all until filling up cavities, soil cave 13 and crack, so that block that karst further develops is logical
Road, eliminates roadbed and produces differential settlement and the geological conditions collapsed.
If slip casting process meets empty Karst corridor, compared with cavern and crack at, first irrigated depending on concrete condition flyash or in
Coarse sand is filled to corrosion cavity, until using cement grout or two fluid grouting after solution-cavity filling again, full-filling solution cavity is general
Using single fluid grouting.Grouting pressure typically uses near 0.3MPa, rock soil interface and is progressively enlarged to 0.3~0.8MPa, general note
Starch pressure and be no more than 1MPa.Grouting pressure is directed to during slip casting depending on grouting method, slip casting section depth and level of ground water
The situation of appearance adjusts pressure at any time.
Step 7,
, i.e.,, can when slurries are difficult to inject when pressure is more than 1~1.5Mpa when grouting pressure reaches termination grouting pressure
It is considered as slip casting completion, exits Grouting Pipe 18, slip casting uses cement mortar sealing of hole to aperture in time after terminates.
The utility model slip casting structure by pilot hole 3 and injected hole (including slip casting straight hole 5 and slip casting inclined hole 6) slip casting and
Pressure returns slurry and is filled with the molten chamber 7 of karst and upper overburden layer corrosion soil cave and crack, improves the permeability of subgrade soils, effectively improves
Stratum anti-permeability performance, encloses the submarine erosion action of underground water, eliminates roadbed and produces differential settlement and the geology bar collapsed
Part, guarantee is provided for railway normal safe operation.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modifications, equivalent substitutions and improvements made etc. should be included in the utility model
Protection domain within.
Claims (9)
1. a kind of slip casting structure of covered karst embankment, it is characterised in that：Including embankment roadbed, it is arranged in embankment roadbed bottom
The pilot hole of both sides side slope toe, the injected hole for being arranged in embankment roadbed top both sides curb, the substrate of the embankment roadbed have
The molten chamber of karst, the pilot hole is arranged on around the molten chamber of karst, and the injected hole directly gos deep into the molten chamber of karst.
2. the slip casting structure of covered karst embankment according to claim 1, it is characterised in that：The embankment（1）Roadbed
Surface is two-wire or yard-and-station roadbed, and the embankment roadbed includes clay layer successively from top to bottom（9）, layer of sand（10）, limestone（15）
The ternary structural of composition.
3. the slip casting structure of covered karst embankment according to claim 1, it is characterised in that：Between the pilot hole
Spacing 6m, pierces limestone depth for 5~8m.
4. the slip casting structure of the covered karst embankment according to claim 1 or 3, it is characterised in that：The pilot hole note
Hole is starched in limestone table plane into plum blossom hole interlaced arrangement, spacing is 5~6m.
5. the slip casting structure of covered karst embankment according to claim 1, it is characterised in that：Installed in the injected hole
There is steel sleeve, the steel sleeve is joined directly together by mounting flange with Grouting Pipe, the Grouting Pipe other end and slip casting machine
（16）It is connected.
6. the slip casting structure of covered karst embankment according to claim 1, it is characterised in that：The injected hole includes note
Starch straight hole and slip casting inclined hole, slip casting straight hole and the interspersed arrangement of slip casting inclined hole.
7. the slip casting structure of covered karst embankment according to claim 6, it is characterised in that：The slip casting straight hole and note
It is 3m to starch the curb interplanar spacing between inclined hole, and slip casting straight hole pierces limestone depth for 5~8m with slip casting inclined hole.
8. the slip casting structure of covered karst embankment according to claim 6, it is characterised in that：The slip casting inclined hole is set
To first layer solution cavity position below grey scar.
9. the slip casting structure of covered karst embankment according to claim 5, it is characterised in that：The steel sleeve and slip casting
The closely connected tight in hole, steel sleeve bottom enters the molten chamber of karst, and 10~12cm of earth's surface is exposed on top.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621270147.3U CN206337474U (en) | 2016-11-24 | 2016-11-24 | The slip casting structure of covered karst embankment |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740399A (en) * | 2017-11-16 | 2018-02-27 | 中铁第四勘察设计院集团有限公司 | A kind of structure and its construction method for handling both wired karst slope type water damages |
| CN108301839A (en) * | 2018-01-25 | 2018-07-20 | 四川叙大铁路有限责任公司 | A kind of pumping decompression orientation grouting equipment and method |
| CN108914937A (en) * | 2018-08-07 | 2018-11-30 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of roadbed grouting device |
| CN109958014A (en) * | 2017-12-23 | 2019-07-02 | 侯林杰 | A kind of Reinforcement of Highway structure |
| CN110144896A (en) * | 2019-05-21 | 2019-08-20 | 湖南宏禹工程集团有限公司 | Concrete defect leak quick blocking restorative procedure in a kind of underground space engineering |
| CN110258192A (en) * | 2019-06-04 | 2019-09-20 | 中铁二十五局集团第六工程有限公司 | The construction method of high-speed rail route roadbed karst collapse |
| CN110331982A (en) * | 2019-07-08 | 2019-10-15 | 中铁第四勘察设计院集团有限公司 | It is a kind of pass through karst region overlying sand shield tunnel protection construction and method |
| CN110671075A (en) * | 2019-10-17 | 2020-01-10 | 中国煤炭地质总局勘查研究总院 | Grouting prevention and control method for separation layer grouting |
| CN112941976A (en) * | 2019-12-11 | 2021-06-11 | 北京恒祥宏业基础加固技术有限公司 | Construction method for settlement, lifting and reinforcement of high-speed railway foundation in karst area |
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2016
- 2016-11-24 CN CN201621270147.3U patent/CN206337474U/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740399A (en) * | 2017-11-16 | 2018-02-27 | 中铁第四勘察设计院集团有限公司 | A kind of structure and its construction method for handling both wired karst slope type water damages |
| CN109958014A (en) * | 2017-12-23 | 2019-07-02 | 侯林杰 | A kind of Reinforcement of Highway structure |
| CN108301839A (en) * | 2018-01-25 | 2018-07-20 | 四川叙大铁路有限责任公司 | A kind of pumping decompression orientation grouting equipment and method |
| CN108914937B (en) * | 2018-08-07 | 2024-03-01 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Roadbed grouting device |
| CN108914937A (en) * | 2018-08-07 | 2018-11-30 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of roadbed grouting device |
| CN110144896A (en) * | 2019-05-21 | 2019-08-20 | 湖南宏禹工程集团有限公司 | Concrete defect leak quick blocking restorative procedure in a kind of underground space engineering |
| CN110258192A (en) * | 2019-06-04 | 2019-09-20 | 中铁二十五局集团第六工程有限公司 | The construction method of high-speed rail route roadbed karst collapse |
| CN110331982A (en) * | 2019-07-08 | 2019-10-15 | 中铁第四勘察设计院集团有限公司 | It is a kind of pass through karst region overlying sand shield tunnel protection construction and method |
| CN110331982B (en) * | 2019-07-08 | 2023-09-26 | 中铁第四勘察设计院集团有限公司 | Shield tunnel protection device and method for penetrating through sand coating on karst region |
| CN110671075B (en) * | 2019-10-17 | 2021-07-23 | 中国煤炭地质总局勘查研究总院 | Grouting prevention and control method for separation layer grouting |
| CN110671075A (en) * | 2019-10-17 | 2020-01-10 | 中国煤炭地质总局勘查研究总院 | Grouting prevention and control method for separation layer grouting |
| CN112941976A (en) * | 2019-12-11 | 2021-06-11 | 北京恒祥宏业基础加固技术有限公司 | Construction method for settlement, lifting and reinforcement of high-speed railway foundation in karst area |
| CN112941976B (en) * | 2019-12-11 | 2023-02-28 | 北京恒祥宏业基础加固技术有限公司 | Construction method for settlement, lifting and reinforcement of high-speed railway foundation in karst area |
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| TR01 | Transfer of patent right |
Effective date of registration: 20180926 Address after: 430063 No. 745, Ping Yuan Road, Yangyuan, Wuchang, Wuhan, Hubei Co-patentee after: GUANGZHOU HOLDING COMPANY OF THE CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP Co.,Ltd. Patentee after: CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP Co.,Ltd. Address before: 432100 No. 745, Ping Yuan Road, Yangyuan, Wuchang, Wuhan, Hubei Patentee before: CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430063 No. 745 Heping Avenue, Wuchang, Hubei, Wuhan Patentee after: CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP Co.,Ltd. Patentee after: Guangdong Railway Planning, Design and Research Institute Co.,Ltd. Address before: 430063 No. 745 Heping Avenue, Wuchang, Hubei, Wuhan Patentee before: CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP Co.,Ltd. Patentee before: GUANGZHOU HOLDING COMPANY OF THE CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP Co.,Ltd. Address after: 430063 No. 745 Heping Avenue, Wuchang, Hubei, Wuhan Patentee after: CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP Co.,Ltd. Patentee after: Guangdong railway planning, design and Research Institute Co.,Ltd. Address before: 430063 No. 745 Heping Avenue, Wuchang, Hubei, Wuhan Patentee before: CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP Co.,Ltd. Patentee before: Guangdong Railway Planning, Design and Research Institute Co.,Ltd. |