CN206111182U - Wear supporting construction at existing station under rectangle tunnel section zero distance - Google Patents
Wear supporting construction at existing station under rectangle tunnel section zero distance Download PDFInfo
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- CN206111182U CN206111182U CN201620832563.1U CN201620832563U CN206111182U CN 206111182 U CN206111182 U CN 206111182U CN 201620832563 U CN201620832563 U CN 201620832563U CN 206111182 U CN206111182 U CN 206111182U
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Abstract
The utility model relates to a wear supporting construction at existing station under rectangle tunnel section zero distance. It warp greatly to wear subsiding of existing station under the newly -built circuit. The utility model discloses before tunnel excavation, execute in tunnel face department and be deep - hole grouting and add the solid, adopt the annular excavation to reserve the upper and lower pilot tunnel in the on -line outside about core indigenous method symmetry excavation, in time execute and do the preliminary bracing, vertically set up the jack in existing station below, set up the vertical shaped steel steelframe of side wall. The utility model discloses by steelframe + synergism such as H steel + hydraulic jack + stiffening rib plate + grouting material, take hydraulic pressure synchro control jacking technique and combine other assistance measures, form the crowd top through the preinstallation at newly -built structural a plurality of large -tonnage jack just and support and provide the counter -force compensation to existing ground iron construction, form rigidity, adjustable combined supporting system, to the support of the existing station in upper portion structural formation, reach the existing station structural distortion's of effective control purpose.
Description
Technical field
This utility model is related to Tunnel Engineering technical field, and in particular to wear existing under a kind of Rectangular Tunnel section zero distance
The supporting construction at station.
Background technology
With the Large scale construction of urban rail transit in China, Urban Underground sky asks that utilization rate is being stepped up, newly-built line
Existing line is worn on road situation under needing is more and more.The mode of passing through have on wear, under wear and wear three kinds with side, wherein under wear existing subway
Existing subway station engineering technology difficulty is worn under line project, particularly bored tunnel maximum, risk highest.Wear in subway tunnel
More in building up station work progress, the country rock soil body can be produced and disturb and cause stratum deformation, when deformation reaches to a certain degree
The operation security of existing subway station will be had influence on.Meanwhile, constructing metro tunnel advance reinforcement controlling measurement not at that time, Ke Nengyin
Sedimentation or the protuberance of existing subway station are played, or even produces damaging influence, when serious, will also have influence on the life of related personnel
Property safety, especially in city business district, if there is such issues that, will produce very severe social influence.
It is between new tunnel and existing structure to retain 2m that the traditional method for designing of building up station is worn under general newly-built circuit
The interlayer soil of～3m, by slip casting（Steel tube shed, ductule or deep hole grouting）Or the method such as freeze and reinforce interlayer soil in advance, to subtract
The sedimentation and deformation of building up station base plate when Pollen sterility is excavated.Practice finds that the deformation that above-mentioned engineering method is produced is still very big, and upper strata
Even if structure also is difficult to recover after grouting and reinforcing again Yi Dan generation sedimentation and deformation, subway engineering development cannot be met
Need.
The content of the invention
The purpose of this utility model is to provide under a kind of Rectangular Tunnel section zero distance the supporting construction for wearing building up station,
Top building up station structure is formed and is supported, reach the purpose of effective control building up station malformation.
The technical scheme adopted by this utility model for：
The supporting construction of building up station is worn under a kind of Rectangular Tunnel section zero distance, it is characterised in that：
It is Rectangular Tunnel below building up station, in Rectangular Tunnel, is provided with preliminary bracing, preliminary bracing is included along tunnel side
To the steelframe of equally distributed rectangle ring；
It is close to the building up station bottom cushion of building up station at the top of preliminary bracing；
Preliminary bracing arranges a Pin H steel every three Pin steelframes, and H steel anyhow arranged in a crossed manner, top H are arranged inside H steel
Jack is provided between at the top of other H steel below steel and top H steel.
Top steel plate is provided with and H steel between at the top of jack, bottom steel plate between very heavy top/bottom part and H steel, is provided with, it is very heavy
Top/bottom part is outer to be provided with the vertical foot steel plate for being fixed on bottom steel plate collarette week.
H steel is provided with floor of putting more energy into, positioned at the position of correspondence jack.
This utility model has advantages below：
1st, this utility model follows the principle of newly built tunnels and existing structure rigid contact, and construction is using partial excavation, portion
Portion's cyclization measure, support top is using active roof-propping, hierarchical loading, dynamic regulating measures.
2nd, supporting structure system of the present utility model is by steelframe+H steel+hydraulic jack+floor of putting more energy into+grouting and reinforcing body etc.
Supporting measure coordinates collective effect, forms rigidity, adjustable Composite Supporting System, top building up station structure is formed and is supported,
The deformation of energy effective control building up station structure, it is ensured that its operation security.
3rd, Rectangular Tunnel structure roof and building up station base plate rigidity closing contact, it is to avoid clamp between new, old structure
Soil layer need to be taken pipe curtain and extend out the measures such as slip casting in advance, reduce input, with economic, efficient advantage.
Description of the drawings
Fig. 1 is vertical section schematic diagram of the present utility model.
Fig. 2 is schematic cross section of the present utility model.
Fig. 3 is C nodes drawing of the present utility model（Jack）.
Fig. 4 is A-A profiles of the present utility model.
Fig. 5 is B-B profiles of the present utility model.
In figure, 1- building up station, 2-H steel, 3- steelframes, 4- jack, 5- Core Soils, 6- grouting and reinforcing bodies, the 7- initial stages
Shield, 8- are put more energy into floor, 9- tops steel plate, 10- foot steel plates, 11- bottoms steel plate, 12- building up station bottom cushions.
Specific embodiment
This utility model is described in detail with reference to specific embodiment.
This utility model is related under Rectangular Tunnel section zero distance the supporting construction for wearing building up station, opens in Tunneling by mining method
Before digging, deep hole grouting reinforcing body 6 is performed at tunnel tunnel face, left and right line is symmetrically excavated using Ring Cutting provided core soil method
The upper and lower pilot tunnel in interior outside, performs preliminary bracing 7 in time, and below building up station 1, longitudinal direction arranges 1 Pin thousand every 3 Pin grid steel frames
Jin top 4+ profile steel frames 3, left and right line each mileage section respectively set 3 100 t hydraulic self-lockings jack 4.First frame during excavation
If the vertical profile steel frame 3 of side wall, is welded to connect muscle；Top profile steel frame 3 is installed again, jack 4 should be installed in profile steel frame 3
Reserved fixed position, the installation method at its position that is connected with profile steel frame 3 is as shown in Fig. 4.By steelframe 3+H steel 2+ hydraulic pressure
Jack 4+ puts more energy into 6 grade synergism of floor 8+ grouting and reinforcings body, forms rigidity, adjustable Composite Supporting System, to top both
There is station structure to be formed to support.Wherein, grouting and reinforcing body 6 is ordinary cement-waterglass dual slurry, and periphery soil stabilization area adopts
Sulphate aluminium cement.
Concrete structure is：
It is Rectangular Tunnel below building up station 1, in Rectangular Tunnel, is provided with preliminary bracing 7.Preliminary bracing 7 is included along tunnel
The steelframe 3 of the equally distributed rectangle ring in direction；It is close to the building up station bottom cushion 12 of building up station 1 at the top of preliminary bracing 7；
Preliminary bracing 7 arranges a Pin H steel 2 every three Pin steelframes 3, arranges H steel 2 anyhow arranged in a crossed manner inside H steel 2, top H steel 2
With at the top of other H steel 2 below top H steel 2 between be provided with jack 4.Left and right line each mileage section respectively sets 3 100
T hydraulic self-lockings jack 4.
Top steel plate 9 is provided with and H steel 2 between at the top of jack 4, between 4 bottom of jack and H steel 2, bottom steel plate is provided with
11,4 bottom periphery ring week of jack is provided with the vertical foot steel plate 10 for being fixed on bottom steel plate 11.H steel 2 is provided with ribbed stiffener
Plate, positioned at the position of correspondence jack 4.
The construction method of the supporting construction of building up station is worn under above-mentioned Rectangular Tunnel section zero distance, is comprised the following steps：
Step one：Stratum pre-reinforcement：
Before tunnel excavation, deep hole grouting reinforcing body 6 is performed at tunnel tunnel face, form effective water-stop curtain, eliminated
Diving and adverse effect of the artesian aquifer to tunneling operation；From bottom to top, longitudinal direction is carried out at twice for slip casting, overlaps 2-3 m；Reinforce
Afterwards, excavation face soil body unconfined compressive strength reaches 0.5MPa, and periphery soil stabilization area reaches 1.0Mpa；
Step 2：The upper and lower pilot drive in outside：
The upper and lower pilot tunnel in outside in the line of left and right is symmetrically excavated using Ring Cutting provided core soil method, the initial stage is performed in time
The soil body under 7 bottom surface of preliminary bracing is drawn during excavation and is removed by shield 7, and 7 top surface of preliminary bracing is closely connected with building up station bottom cushion 12；
Preliminary bracing 7 includes the steelframe 3 along the equally distributed rectangle ring in tunnel direction, arranges a Pin H steel 2, H every three Pin steelframes 3
Anyhow H steel 2 arranged in a crossed manner is set inside steel 2, at the top of other H steel 2 below top H steel 2 and top H steel 2 between pacify
Dress jack 4, after jack 4 is in place, in time to jack pre-add top power 30t, by 5t hierarchical loadings；Sealed after pilot tunnel insertion temporarily
End, in pilot tunnel setting conduit along side wall carries out supplementing slip casting to the grouting and reinforcing area soil body；
Step 3：Pour outside side wall and part top, base plate：
Retreated and pour side wall and part top, base arrangement from interior outward, 2 constructions of ring point, the every section of 4-6m in longitudinal direction,
Interim inverted arch is removed and corresponding, every section of 6-8m is poured with side wall, tears one section open and pours one section, after two lining concrete reach intensity, removes
Template, and set up temporary steel support (400x5 steel pipe@3m)；
Step 4：The upper and lower pilot drive in inner side：
Left and right line is symmetrically carried out, and is blocked with upper and lower pilot tunnel on the inside of step 2 excavation left and right line and temporarily；According to structure of the subway
Settlement monitoring situation, the top of real-time adjustment jack 4 power；
Step 5：Pour inner side side wall and remainder top, base plate：
From it is interior outward, retreat with step 3 pour side wall and part top, base arrangement, and set up temporary steel support (
400x5 steel pipe@3m)；
Step 6：Remove temporary support, under wear the construction of existing line segment and complete.
Content of the present utility model is not limited to cited by embodiment, and those of ordinary skill in the art are new by reading this practicality
Type description and any equivalent conversion taken to technical solutions of the utility model, are claim institute of the present utility model
Cover.
Claims (3)
1. the supporting construction of building up station is worn under a kind of Rectangular Tunnel section zero distance, it is characterised in that：
Building up station（1）Lower section is Rectangular Tunnel, and preliminary bracing is provided with Rectangular Tunnel（7）, preliminary bracing（7）Including along tunnel
The steelframe of the equally distributed rectangle ring in road direction（3）；
Preliminary bracing（7）It is close to building up station in top（1）Building up station bottom cushion（12）；
Preliminary bracing（7）Every three Pin steelframes（3）The H steel steelframes of one Pin matrix patterns, H steel and the top H steel of top horizontal are set
Jack is provided between at the top of the vertical H steel of lower section（4）.
2. the supporting construction of building up station, its feature are worn under a kind of Rectangular Tunnel section zero distance according to claim 1
It is：
Jack（4）Top and H steel（2）Between be provided with top steel plate（9）, jack（4）Bottom and H steel（2）Between be provided with
Bottom steel plate（11）, jack（4）Bottom periphery ring week is provided with is fixed on bottom steel plate（11）Vertical foot steel plate（10）.
3. the supporting construction of building up station, its feature are worn under a kind of Rectangular Tunnel section zero distance according to claim 1
It is：
H steel（2）Floor of putting more energy into is provided with, positioned at correspondence jack（4）Position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620832563.1U CN206111182U (en) | 2016-08-03 | 2016-08-03 | Wear supporting construction at existing station under rectangle tunnel section zero distance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620832563.1U CN206111182U (en) | 2016-08-03 | 2016-08-03 | Wear supporting construction at existing station under rectangle tunnel section zero distance |
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| Publication Number | Publication Date |
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| CN206111182U true CN206111182U (en) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620832563.1U Active CN206111182U (en) | 2016-08-03 | 2016-08-03 | Wear supporting construction at existing station under rectangle tunnel section zero distance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050245A (en) * | 2016-08-03 | 2016-10-26 | 中铁第勘察设计院集团有限公司 | Supporting structure for zero distance underneath pass of existing station of rectangular tunnel section and construction method |
| CN112253142A (en) * | 2020-11-27 | 2021-01-22 | 鲁东大学 | Construction method for short-clear-distance upward-crossing main tunnel of connecting air duct of deep and long tunnel |
-
2016
- 2016-08-03 CN CN201620832563.1U patent/CN206111182U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050245A (en) * | 2016-08-03 | 2016-10-26 | 中铁第勘察设计院集团有限公司 | Supporting structure for zero distance underneath pass of existing station of rectangular tunnel section and construction method |
| CN112253142A (en) * | 2020-11-27 | 2021-01-22 | 鲁东大学 | Construction method for short-clear-distance upward-crossing main tunnel of connecting air duct of deep and long tunnel |
| CN112253142B (en) * | 2020-11-27 | 2022-05-24 | 鲁东大学 | Construction method for short-clear-distance upward-crossing main tunnel of connecting air duct of deep and long tunnel |
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