CN207063982U - Mechanical assistance sealing Station structure in a kind of pilot tunnel - Google Patents

Mechanical assistance sealing Station structure in a kind of pilot tunnel Download PDF

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Publication number
CN207063982U
CN207063982U CN201720939665.8U CN201720939665U CN207063982U CN 207063982 U CN207063982 U CN 207063982U CN 201720939665 U CN201720939665 U CN 201720939665U CN 207063982 U CN207063982 U CN 207063982U
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China
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cavern
lining
center pillar
arch
plate
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CN201720939665.8U
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高辛财
吕亮
惠丽萍
易建伟
鲍凯
乔峰
邱婧
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Beijing General Municipal Engineering Design and Research Institute Co Ltd
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Beijing General Municipal Engineering Design and Research Institute Co Ltd
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Abstract

The utility model discloses mechanical assistance sealing Station structure in a kind of pilot tunnel, two side pilot tunnels of top cavern and the top of middle drift are first branch button arch and side arch, the lining structure composite bed of hogging two, the bottom of top cavern is middle plate, and bottom cavern is between middle plate and bottom plate;Top, the both walls of bottom cavern are outside skirt piles, stake top Guan Liang and waterproof between piles curtain, top, the centre of bottom cavern are center pillar pile foundation, center pillar and top beam, and first branch button arch and side two lining structure composite bed one end of arch are supported in the Guan Liang of both sides skirt piles top, the other end is supported in top beam;First branch button arch and the lining structure composite bed both ends of hogging two are supported in top beam;Both sides skirt piles, center pillar pile foundation are extended to below bottom plate.The utility model can solve the problems, such as Station sealing construction, cancel the lower pilot drive in traditional cavern-pile method, avoid requirement of the lower pilot drive to dewatering construction, and center pillar, as construction and permanent structure stress basis, eliminates bottom girder under post using pile foundation.

Description

Mechanical assistance sealing Station structure in a kind of pilot tunnel
Technical field
Station structure technology in city track traffic engineering is the utility model is related to improve.
Background technology
At present mainly there is the construction method of Station in city track traffic engineering:Middle hole method, side hole method, post hole method, Cavern-pile method, once detain arch method.Wherein middle hole method, side hole method, post hole method use partial excavation, perform just branch structure, open in the ban After digging the advanced certain distance in part, then the excavation at next position is carried out, two lining structures need to equally take segmentation, branch's piecemeal to apply Work;Cavern-pile method and once button arch method are to utilize " pilot tunnel " then to enter as after construction working face formation structure vertical applied force system Just branch button encircles row, then from top to bottom inverse to build construction agent structure.
Cavern-pile method:Stress system at initial stage is collectively formed by skirt piles, center pillar, top beam, bottom girder, crown, bears to construct The load of journey;Its main thought is that lid digging and substep subsurface excavation method combine, and respective advantage is played, in the guarantor of top cover Shield is lower can successively to excavate the soil body downwards, apply secondary lining, can use along making and against two methods construction is made, ultimately form by The permanent carrying system that preliminary bracing+secondary lining combines.
Once button arch law technology core is:The end bay crown and base arrangement of three arcading frameworks are chosen, is fitted respectively simultaneously Form upper and lower pilot tunnel;Bottom plate and bottom girder directly, are disposably formed prior to other components in lower pilot tunnel;In upper and lower pilot tunnel Between formed vertical supporting component;It is that crown just props up that upper pilot tunnel, which just props up, and crown and top beam secondary lining can be straight in upper pilot tunnel Connect, disposably complete.
In summary, cavern-pile method and once button arch method be primarily present upper and lower two layers of pilot tunnel, multiple electrodes are relatively obvious, apply Man-hour has a great influence to surrounding enviroment.It is built and building similar Station Project with reference to Beijing area, because station structure section is big, be Engineering risk is avoided, station construction is using dewatering construction as premise, i.e., before station structure excavates, it is pre- need to excavate periphery along station Dewatering well is first set, first level of ground water is down to below structural excavation bottom surface after 1m, and carries out continuing precipitation work in work progress Industry, then excavate station structure.Therefore, not by influence on groundwater when skirt piles and center pillar are constructed, mainly it is able to by manually digging hole Realize.
At present, it is built and use dewatering construction building Station, dewatering construction mode be broadly divided into surface precipitation and Precipitation in hole, specifically refers to Fig. 9, Figure 10.Dewatering construction, is unfavorable for the protection of China's groundwater resources, and is easily caused underground water The pollution and waste of resource, non-permanent plan.As Mined accumulates and develops, the utility model structural shape and apply Work method can realize Station sealing construction, be advantageous to the protection of groundwater resources.
According to the related Station sealing patent retrieved:A kind of cavern-pile method bored tunnel water-stop curtain and its construction Method (CN201610035449.0), its structural shape are made up of upper and lower 2 pilot tunnels, and pilot tunnel construction is by tunneling boring or week Wall ejection for water plugging is obtained in realization, then horizontal and vertical levels slip casting/rotary-spraying construction is carried out by upper and lower pilot tunnel, so as to realize Station tunneling boring sealing, specifically refers to Figure 11.Influenceed by lower floor's pilot tunnel, this patent engineering sealing cost is big.
The content of the invention
The purpose of this utility model is to provide mechanical assistance sealing Station structure in a kind of pilot tunnel, to solve tunneling car Stand the technical problem of not dewatering construction.
In order to realize foregoing invention purpose, technical scheme is as follows used by the utility model:
Mechanical assistance sealing Station structure in a kind of pilot tunnel, two side pilot tunnels of top cavern and the top of middle drift For first branch button arch and side arch, the lining structure composite bed of hogging two, the bottom of top cavern is middle plate, and bottom cavern is located at middle plate and bottom Between plate, bottom plate, side wall, side arch and hogging are externally provided with waterproof layer.Top, the both walls of bottom cavern are outside skirt piles, stake top is preced with Beam and waterproof between piles curtain, top, the centre of bottom cavern are center pillar pile foundation, center pillar and top beam, and first branch button arch and side encircle two Lining structure composite bed one end is supported at the top of the skirt piles of both sides in Guan Liang, the other end is supported in top beam, by between both sides skirt piles, stake Water-stop curtain, stake top Guan Liang and the lining of side arch two form station building enclosure and end bay vertical supporting system;First branch button arch and hogging Two lining structure composite bed both ends are supported in top beam, by as the center pillar pile foundation of permanent primary structure member, center pillar, top beam and in Encircle two lining structures and form station mid-span vertical supporting system;The both sides skirt piles, center pillar pile foundation are extended to below bottom plate.
The advantages of the utility model and good effect are as follows:
1st, the lower pilot drive in traditional cavern-pile method, once button arch method can be cancelled, only apply individual layer pilot tunnel, terminated tunneling The risk of manually digging hole pile and manually installed steel pipe column in the pilot tunnel of station, avoid lower pilot drive and dewatering construction is wanted Ask, weaken multiple electrodes, reduce construction risk and the influence to surrounding enviroment, while substantially increase Station mechanization and apply Engineering degree and operating efficiency;
2nd, mechanization applies skirt piles, waterproof between piles curtain, center pillar pile foundation, improves mechanized construction level, reduces tunneling Labor operation intensity and engineering risk;
3rd, mechanical assistance integrated construction center pillar and pile foundation, avoid and be positioned manually, center pillar is installed and cuts pile crown, improve Efficiency of construction and improve construction operation environment;
4th, when level of ground water is located at below pilot tunnel, vertical water-stop curtain is applied downwards using pilot tunnel:Between cast-in-situ bored pile+stake Churning, casing bitten pile etc., dewatering construction can be avoided, save groundwater resources, reduce adverse effect of the precipitation to surrounding enviroment, Reduce the risk in Station work progress caused by underground water seepage;
5th, center pillar pile foundation is constructed as center pillar and permanent holding force basis, the post bottom eliminated in traditional structure pattern are vertical Beam, reduce construction costs.
The construction tunneling underground station under same environmental conditions is equal with " cavern-pile method " and " once detaining arch method " for the utility model Station architecture functional requirement can be met, its economic technology Comprehensive Comparison situation is as shown in table 1.
Brief description of the drawings
Fig. 1 is of the present utility model to apply vertical shaft, transverse passage-way and upper strata pilot tunnel structural representation.
Fig. 2 is of the present utility model to apply skirt piles, waterproof between piles curtain, center pillar pile foundation, formed by integrally casting concrete and center pillar Installation, pours stake top Guan Liang, top beam and the lining structure schematic diagram of hogging two.
Fig. 3 is that of the present utility model apply in just branch button arch and completion pilot tunnel backfills structural representation.
Fig. 4 is that the side of the present utility model that applies encircles two lining structures (containing vault and side wall waterproof layer) and completes two lining button arch knots Structure schematic diagram.
Fig. 5 is that earth excavation downwards of the present utility model to middle plate, pours middle plate and the lining structure schematic diagram of the above two.
Fig. 6 be it is of the present utility model be excavated to bottom plate downwards, apply bottom cushion and waterproof layer, pour bottom plate and the above two Lining structure schematic diagram.
Fig. 7 is mechanical assistance sealing Station supporting construction sectional drawing in pilot tunnel of the present utility model.
Fig. 8 is mechanical assistance sealing Station Main Structural Section figure in pilot tunnel of the present utility model.
Fig. 9 is prior art Station surface precipitation structure section figure.
Figure 10 is Precipitation Structure sectional drawing in prior art Station pilot tunnel.
Figure 11 is the cavern-pile method bored tunnel water-stop curtain and its construction method structure section figure of existing sealing patented technology.
Figure 12 is the section structure diagram of existing cavern-pile method construction.
Figure 13 is the existing section structure diagram for once detaining the construction of arch method.
Numbered in figure:1st, ground, 2, construction shaft, 3, construction transverse passage-way, 4, one of side pilot tunnel, 5, middle drift, 6, side leads The two of hole, 7, level of ground water, 8, top beam and hogging two serve as a contrast, and 9, one of waterproof between piles curtain, 10, center pillar, 11, waterproof between piles curtain The two of curtain, 12, water barrier (natural/artificial), 13, one of side column, 14, center pillar pile foundation, 15, the two of skirt piles, 16, stake top Guan Liang, 17th, pilot tunnel backfill, 18, first branch button arch, 19, side encircle two lining structures, 20, middle plate and the lining structure of the above two, 21, bottom plate and the above two Lining structure, 22, bottom cushion and waterproof layer.
Embodiment
Mechanical assistance sealing Station structure in a kind of pilot tunnel, two side pilot tunnels of top cavern and the top of middle drift For first branch button arch and side arch, the lining structure composite bed of hogging two, the bottom of top cavern is middle plate, and bottom cavern is located at middle plate and bottom Between plate, bottom plate, side wall, side arch and hogging are externally provided with waterproof layer.Top, the both walls of bottom cavern are outside skirt piles, stake top is preced with Beam and waterproof between piles curtain, top, the centre of bottom cavern are center pillar pile foundation, center pillar and top beam, and first branch button arch and side encircle two Lining structure composite bed one end is supported at the top of the skirt piles of both sides in Guan Liang, the other end is supported in top beam, by between both sides skirt piles, stake Water-stop curtain, stake top Guan Liang and the lining of side arch two form station building enclosure and end bay vertical supporting system;First branch button arch and hogging Two lining structure composite bed both ends are supported in top beam, by as the center pillar pile foundation of permanent primary structure member, center pillar, top beam and in Encircle two lining structures and form station mid-span vertical supporting system;The both sides skirt piles, center pillar pile foundation are extended to below bottom plate.
Mechanical assistance sealing Station construction method in pilot tunnel of the present utility model:Construction shaft is excavated to transverse passage-way bottom Afterwards, back cover is carried out to construction shaft, then excavation construction transverse passage-way, excavating station main hole using transverse passage-way of constructing (contains side Pilot tunnel and middle drift).Operation side mechanical execution skirt piles, waterproof between piles curtain are used as by side pilot tunnel, pour stake top Guan Liang, Form station building enclosure and end bay vertically carries system;By middle drift be used as operation side mechanical execution center pillar pile foundation, Formed by integrally casting concrete and center pillar installation, pour capital top beam and the lining structure of hogging two, form the vertical supporting body of station mid-span System.Recycle construction transverse passage-way to apply station just branch button arch, so as to formed approximate closing (bottom is by strengthening skirt piles build-in depth Degree isolation influences each other with surrounding enviroment), independent working space, it is from top to bottom inverse to build station two lining structure, complete station Main structure construction.Structural representation of the present utility model is referring to Fig. 7.
Specific steps:
1st, vertical shaft, transverse passage-way and pilot tunnel (pilot tunnel containing side and middle drift) are applied, it is shown in Figure 1.
Upside-down well wall approach construction shaft is used by ground, after being excavated to transverse passage-way bottom, back cover is carried out to construction shaft;Then Shaft wall, excavation construction transverse passage-way are abolished, after transverse passage-way end-blocking, recycles construction transverse passage-way to excavate station main hole (pilot tunnel containing side and middle drift).
2nd, machinery applies skirt piles, waterproof between piles curtain and center pillar pile foundation, mechanical assistance formed by integrally casting concrete and center pillar peace Dress, pours stake top Guan Liang, top beam and the lining structure of hogging two (waterproof layer containing vault), shown in Figure 2.
By the use of side pilot tunnel as operation side mechanical execution skirt piles, waterproof between piles curtain, stake top Guan Liang is poured, forms car Building enclosure of standing and end bay vertically carry system;
Operation side mechanical execution center pillar pile foundation, mechanical assistance formed by integrally casting concrete and center pillar are used as by the use of middle drift Installation, hogging vault waterproof layer is laid, pour capital top beam and the lining structure of hogging two, form the vertical supporting body of station mid-span System.
3rd, apply just branch button arch and complete to backfill in pilot tunnel, it is shown in Figure 3.
Construction transverse passage-way is recycled to apply station just branch button arch, working space so as to form approximate closing, independent;Should Working space bottom is influenced each other by strengthening the isolation of skirt piles building-in depths with surrounding enviroment.
4th, apply side and encircle two lining structures (containing vault and side wall waterproof layer), complete two lining button arches, it is shown in Figure 4.
5th, downward earth excavation pours middle plate and the lining structure of the above two (waterproof layer containing side wall), referring to Fig. 5 institutes to middle plate Show.
6th, bottom plate is excavated to downwards, applies bottom cushion and waterproof layer, bottom plate and the lining structure of the above two is poured, referring to Fig. 6 It is shown.
Mechanical assistance sealing Station supporting construction sectional drawing is referring to Fig. 7 institutes in the utility model pilot tunnel after construction Show, mechanical assistance sealing Station Main Structural Section is shown in Figure 8 in pilot tunnel.
Mechanical assistance sealing Station construction method construction speed is mainly controlled by mechanical piling level in hole in pilot tunnel, By constantly updating pile-forming equipment, efficiency of construction can be effectively improved;When level of ground water is below the pilot tunnel of upper strata, can evade completely The problem of dewatering construction.
Table 1:

Claims (1)

1. mechanical assistance sealing Station structure in a kind of pilot tunnel, it is characterised in that two side pilot tunnels of top cavern are with The top of pilot tunnel is first branch button arch and side arch, the lining structure composite bed of hogging two, and the bottom of top cavern is middle plate, bottom cavern position Between middle plate and bottom plate, bottom plate, side wall, side arch and hogging are externally provided with waterproof layer;Top, the both walls of bottom cavern are outside side Stake, stake top Guan Liang and waterproof between piles curtain, top, the centre of bottom cavern are center pillar pile foundation, center pillar and top beam, and first branch button encircles Encircle that two lining structure composite bed one end are supported at the top of both sides skirt piles in Guan Liang, the other end is supported in top beam with side, by both sides Skirt piles, waterproof between piles curtain, stake top Guan Liang and the lining of side arch two form station building enclosure and end bay vertical supporting system;First branch button Arch and the lining structure composite bed both ends of hogging two are supported in top beam, by as the center pillar pile foundation of permanent primary structure member, center pillar, top Longeron and the lining structure of hogging two form station mid-span vertical supporting system;The both sides skirt piles, center pillar pile foundation extend to bottom plate with Under.
CN201720939665.8U 2017-07-31 2017-07-31 Mechanical assistance sealing Station structure in a kind of pilot tunnel Active CN207063982U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110043290A (en) * 2019-06-03 2019-07-23 徐公文 A kind of large section tri-arch tunnel construction method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110043290A (en) * 2019-06-03 2019-07-23 徐公文 A kind of large section tri-arch tunnel construction method

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