CN205296194U - Rich irrigated land layer undercut tunnel interlock pipe curtain - Google Patents
Rich irrigated land layer undercut tunnel interlock pipe curtain Download PDFInfo
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- CN205296194U CN205296194U CN201620051670.0U CN201620051670U CN205296194U CN 205296194 U CN205296194 U CN 205296194U CN 201620051670 U CN201620051670 U CN 201620051670U CN 205296194 U CN205296194 U CN 205296194U
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Abstract
The utility model discloses a rich irrigated land layer undercut tunnel interlock pipe curtain, include and set up interlock pipe curtain along tunnel excavation outline line level, the hole setting was jumped to interlock pipe curtain including the interval clay cement secant pile and interlock set up the steel pipe concrete secant pile between the stake of adjacent clay cement. The utility model discloses need not only to starch wall together through the interlock pipe curtain that sets up outside the tunnel excavation outline line with the horizontal tunnel side walls that is under construction to construction ground precipitation processing, form the stagnant water curtain body of a box to realize the technological effect of tunnel excavation section stagnant water. In addition, interlock pipe curtain and tunnel main part are strutted the steelframe and are formed powerful together and strut the system, and it is stronger struts the technological effect that the deformation of effective control stratum can be realized to the bearing capacity.
Description
Technical field
This utility model relates to technical field of tunnel construction, is specifically related to a kind of water rich strata bored tunnel occlusion pipe curtain.
Background technology
Current shallow buried covered excavation engineering method (PBA method, partial excavation method etc.) in technique all using anhydrous condition as implement premise. When subway construction etc. does not have the site operation of precipitation condition, it is generally adopted a large amount of grouting and reinforcing caverns periphery soil body and has formed the mode of water barrier, realized the excavation operation of underground structure. There is shortcoming and be in this ejection for water plugging technique: water proof need a relatively stringent closing every barrier, to prevent subsoil water from seeing the characteristic that namely hole enters, but the uncertainty of grouting in soil mass makes it accurately to control, and just can only amplify in scale in operation, increase grouting and reinforcing scope, cause bigger waste; The slip casting of substantial amounts of stratum, often brings unexpected injury to periphery underground structure; Substantial amounts of slip casting (includes additive) and brings certain formation characteristics to go bad and certain underground water pollution; Grouting process operation, independent of excavation operation, needs independent equipment and extra process links, bores injected hole particularly in pebble layer extremely inefficient, causes that construction speed is extremely slow; Grouting for water blocking effect is difficult to ensure that, particularly at high artesian stratum and sand-pebble layer, grouting for water blocking is often difficult to produce a desired effect.
" CAM ", " NTR " (the new pipe-roof method) of the national developments such as Italy etc. is a kind of method constructing the underground space after Italy's use first, Korea S's improvement. This engineering method main thought: set the steel pipe that solid matter is arranged at underground space vault and abutment wall structure position, using steel pipe as construction space, by to operations such as the support of tube wall, cutting, welding, form one and can provide, to crown structure, the box hat space tying up muscle, concreting, after crown and side wall complete, then carry out the excavation of the inner space soil body. This engineering method major advantage is: constructing surrounding environment influence is only small, surface subsidence is only small, when carrying out grouting for water blocking outside section of jurisdiction, is effectively reduced the subsoil water impact on main body earth excavation; Major defect is: cost is higher, and another the method carries out substantial amounts of cutting, welding, closing, formwork in the pipe curtain of diameter 2m, tighten, the operation such as build, and field operation condition and working environment are poor, and construction speed is slow.
Additionally, along with the development in city, the buried depth of underground engineering is increasing, the part underground engineering degree of depth has reached 36m, have even into underground bearing water region. Owing to Urban Underground water conservation requires increasingly stricter, when constructing underground building, dewatering mode will be not allowed to, and at water rich strata and when not allowing precipitation, the subsurface excavation method premised on precipitation will be no longer applicable.
As previously mentioned, actual demand and the external Experience in Development in city show, it is inevitable trend that underground engineering develops to buried direction, and buried depth adds senior general and traditional design and construction method are proposed new challenge, and wherein effectively controlling subsoil water is the matter of utmost importance that deep buried metro engineering solves. Therefore, it is necessary to provide a kind of occlusion pipe curtain of water rich strata tunneling large cross-section tunnel reliably and construction method so that boring construction is without surface precipitation, it is possible to ensure to carry out boring construction in without hydrospace.
Utility model content
For above-mentioned prior art Problems existing, this utility model provides a kind of water rich strata bored tunnel occlusion pipe curtain, this utility model is capable of when tunnel excavation is constructed, just the anhydrous condition of construction can be ensured without surface precipitation, this utility model can also realize the advance support effect of constructing tunnel simultaneously, effectively controls stratum deformation.
The purpose of this utility model is achieved through the following technical solutions:
A kind of water rich strata bored tunnel occlusion pipe curtain, including along tunnel excavation contour line be horizontally disposed with occlusion pipe curtain, described occlusion pipe curtain include jumping hole, interval arrange clay cement interlocking pile and occlusion be arranged at the concrete filled steel tube interlocking pile between adjacent clay concrete stake.
This utility model, without construction surface precipitation is processed, by being arranged on occlusion pipe curtain outside tunnel excavation contour line together with construction transverse passage-way sidewall wall for grouting, forms the water-stop curtain body of a box, thus realizing the technique effect of tunnel excavation section sealing. Additionally, occlusion pipe curtain collectively forms strong support system with tunnel main body supporting steelframe, its stronger supporting bearing capacity is capable of effectively controlling the technique effect of stratum deformation.
Further, above-mentioned water rich strata bored tunnel occlusion pipe curtain also includes horizontal advanced tubule, and the occlusion of described horizontal advanced tubule is arranged at occlusion position outside adjacent clay cement interlocking pile and concrete filled steel tube interlocking pile. After clay cement interlocking pile and concrete filled steel tube interlocking pile have been constructed, when especially occlusion curtain only has monocycle, utilize advanced tubule to supplement slip casting, to process the cold seam that occlusion place is likely to occur, ensure the stagnant water effect of occlusion pipe curtain from face.
Further, one or more layers clay cement interlocking pile is set along the occlusion of described occlusion pipe curtain outer contour, according to constructing tunnel stratum practical situation, occlusion pipe curtain number of rings is rationally set, to ensure the anhydrous condition that bored tunnel is constructed.
The beneficial effects of the utility model:
This utility model, without construction surface precipitation is processed, by being arranged on occlusion pipe curtain outside tunnel excavation contour line together with construction transverse passage-way sidewall wall for grouting, forms the water-stop curtain body of a box, thus realizing the technique effect of tunnel excavation section sealing. Additionally, occlusion pipe curtain collectively forms strong support system with tunnel main body supporting steelframe, its stronger supporting bearing capacity is capable of effectively controlling the technique effect of stratum deformation.
Accompanying drawing explanation
Accompanying drawing 1 is monocycle occlusion pipe curtain schematic cross section in this utility model one embodiment;
Accompanying drawing 2 is monocycle occlusion pipe curtain vertical section schematic diagram in this utility model one embodiment
Accompanying drawing 3 is two ring occlusion pipe curtain schematic cross section in this utility model one embodiment;
Accompanying drawing 4 is two ring occlusion pipe curtain schematic cross section in this utility model one embodiment;
Accompanying drawing 5 is two ring occlusion pipe curtain vertical section schematic diagram in this utility model one embodiment;
In figure: 1-is engaged pipe curtain, 2-clay cement interlocking pile, 3-armored concrete interlocking pile, 4-advanced tubule, 5-tunnel main body supporting steelframe, 6-constructs transverse passage-way.
Detailed description of the invention
Below in conjunction with embodiment, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment 1:
As shown in Figure 1 and Figure 2, a kind of water rich strata bored tunnel occlusion pipe curtain, including the concrete filled steel tube interlocking pile 3 being horizontally disposed with clay cement interlocking pile 2 along tunnel excavation contour line in jumping hole, interval mode, occlusion is arranged between adjacent clay concrete stake 2, also including level occlusion and be arranged at the advanced tubule 4 being engaged position outside adjacent clay cement interlocking pile 2 and concrete filled steel tube interlocking pile 3, three collectively forms occlusion pipe curtain 1.
The construction procedure of above-mentioned water rich strata bored tunnel occlusion pipe curtain includes:
Step 1: outside tunnel excavation contour line, all casing drill is adopted to hole with pipe in jumping hole, interval mode, hole inner sleeve retaining wall, Horizontal Directional Drilling if desired, realize bit location by navigator and drilling track is measured, in hard rock or gravel layer, construction can adopt downhole motor or rigidity drilling rod to drive drill bit rotary drilling pore-forming, it is achieved at water-bearing layer middle and long distance pore-forming, it is ensured that pile precision. Guide pipe, wall for grouting and aperture water blockoff measure need to be set during rig horizontal drilling;
Step 2: utilize conduit to irrigate clay cement grout in hole, extracts sleeve pipe while grouting, form clay cement interlocking pile 2;
Step 3: adopt the mode identical with step 1 to hole between the clay cement interlocking pile 2 of initial set;
Step 4: utilize conduit to irrigate armored concrete in the hole that step 3 completes, sleeve pipe is extracted while grouting, forming the armored concrete interlocking pile 3 being mutually twisted with clay concrete stake 2, the diameter of interlocking pile, occlusion thickness and length calculate according to factors such as surrounding rock stability, groundwater condition, edpth of tunnel and construction condition;
Step 5: be engaged position at clay cement interlocking pile 2 and concrete filled steel tube interlocking pile 3 and squeeze into advanced tubule 4, utilize advanced tubule 4 that clay cement interlocking pile 2 and concrete filled steel tube interlocking pile 3 are engaged position and mend slurry, to process the cold seam that occlusion place is likely to occur, it is ensured that stagnant water effect.
Step 5: drainage underground water in tunnel, partial excavation tunnel cross-section, erect tunnel main body supporting steelframe 5, gunite concrete, follow up secondary lining.
This utility model is without processing construction surface precipitation, by the occlusion pipe curtain 1 of construction outside tunnel excavation contour line together with the wall for grouting of construction transverse passage-way 6 sidewall, form the water-stop curtain body of a box, thus realizing the technique effect of tunnel excavation section sealing. Additionally, occlusion pipe curtain 1 collectively forms strong support system with tunnel main body supporting steelframe 6, its stronger supporting bearing capacity is capable of effectively controlling the technique effect of stratum deformation. Utilize advanced tubule 4 to supplement slip casting, to process the cold seam that occlusion place is likely to occur, ensure the stagnant water effect of occlusion pipe curtain 1 from face.
Additionally, armored concrete interlocking pile 3 has higher bearing strength, sealing performance is better, but clay cement interlocking pile 2 is relatively costly relatively. And clay cement interlocking pile 2 can be drawn materials because of ground, with cement, clay and water for primary raw material, can filling a small amount of fine sand and firming agent if desired, determine optimum mix by testing, agitated machine scene mixing forms clay cement grout. Generally, clay cement grout can be not spiked with retarder, without regulating setting time, just can meeting interlocking pile construction timing requirements, and clay cement grout intensity is low, aggregate size is little, overlapping part pore-forming resistance is little, occlusal surface overlap joint performance and Forming Quality are better, have saved construction costs, have reduced difficulty of construction. Therefore when monocycle antipriming pipe curtain only need to be arranged, by clay cement interlocking pile 2 and armored concrete interlocking pile 3 with the use of, namely improve the support capacity of water-stop curtain, reduce again construction cost.
Embodiment 2:
As shown in Fig. 3, Fig. 4, Fig. 5, on the basis of embodiment 1, without mending slurry with advanced tubule 4, but be engaged on pipe curtain 1 basis at the first ring and one layer of occlusion curtain 1 being all made up of clay cement interlocking pile 2 is set again, second ring occlusion pipe curtain 1 engineering time was engaged curtain 1 presetting period according to the first ring and determined, and all the other forms of construction work and main points and embodiment 1 are identical.
This utility model combined factors such as the surrounding rock stability on stratum, groundwater condition, edpth of tunnel of can constructing according to difference considers, the number of rings of flexible design occlusion pipe curtain, while can ensureing the anhydrous execution conditions of bored tunnel, efficiency of construction can be improved again, save construction cost. Therefore, this utility model is in technical field of tunnel construction, particularly in, in water rich strata secret agent's constructing tunnel, having the stronger suitability and good economic benefit.
As it has been described above, then can well realize this utility model.
Claims (3)
1. a water rich strata bored tunnel occlusion pipe curtain, it is characterized in that: along tunnel excavation contour line be horizontally disposed with occlusion pipe curtain, described occlusion pipe curtain include jumping hole, interval arrange clay cement interlocking pile and occlusion be arranged at the concrete filled steel tube interlocking pile between adjacent clay concrete stake.
2. water rich strata bored tunnel according to claim 1 occlusion pipe curtain, it is characterised in that: also including horizontal advanced tubule, the occlusion of described horizontal advanced tubule is arranged at occlusion position outside adjacent clay cement interlocking pile and concrete filled steel tube interlocking pile.
3. water rich strata bored tunnel according to claim 1 occlusion pipe curtain, it is characterised in that: along the occlusion of described occlusion pipe curtain outer contour, one ring or multi-ring clay cement interlocking pile are set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620051670.0U CN205296194U (en) | 2016-01-20 | 2016-01-20 | Rich irrigated land layer undercut tunnel interlock pipe curtain |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620051670.0U CN205296194U (en) | 2016-01-20 | 2016-01-20 | Rich irrigated land layer undercut tunnel interlock pipe curtain |
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| CN205296194U true CN205296194U (en) | 2016-06-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525619A (en) * | 2016-01-20 | 2016-04-27 | 中铁隆工程集团有限公司 | Occlusive pipe curtain for bored tunnel in water-rich stratum and construction method of occlusive pipe curtain |
| CN109751065A (en) * | 2019-01-18 | 2019-05-14 | 东北大学 | A kind of splicing steel pipe and the pin-connected panel pipe curtain structure support system construction method using splicing steel pipe |
-
2016
- 2016-01-20 CN CN201620051670.0U patent/CN205296194U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525619A (en) * | 2016-01-20 | 2016-04-27 | 中铁隆工程集团有限公司 | Occlusive pipe curtain for bored tunnel in water-rich stratum and construction method of occlusive pipe curtain |
| CN105525619B (en) * | 2016-01-20 | 2018-10-02 | 中铁隆工程集团有限公司 | A kind of water rich strata bored tunnel occlusion pipe curtain |
| CN109751065A (en) * | 2019-01-18 | 2019-05-14 | 东北大学 | A kind of splicing steel pipe and the pin-connected panel pipe curtain structure support system construction method using splicing steel pipe |
| CN109751065B (en) * | 2019-01-18 | 2019-10-29 | 东北大学 | A kind of splicing steel pipe and the pin-connected panel pipe curtain structure support system construction method using splicing steel pipe |
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