CN205315014U

CN205315014U - Stride that active fault tunnel is anti to glue secondary lining that slide moved

Info

Publication number: CN205315014U
Application number: CN201620022380.3U
Authority: CN
Inventors: 张志强; 张彪; 盛越; 张洋
Original assignee: Southwest Jiaotong University
Current assignee: Urumqi Urban Rail Group Co Ltd; Southwest Jiaotong University; China Railway First Survey and Design Institute Group Ltd
Priority date: 2016-01-11
Filing date: 2016-01-11
Publication date: 2016-06-15
Anticipated expiration: 2026-01-11

Abstract

The utility model discloses a stride that active fault tunnel is anti to glue secondary lining that slide moved, its primary structure is: support grudging post (7) position in addition in the reinforced concrete layer and be trompil layer (1), and the position that supports within grudging post (7) is inlayer (3), the thickness of inlayer (3) and trompil layer (1) is than being 1~1.8: 1, trompil layer (1) in alternate and to have fore -and -aft hollow tube (2), the diameter of hollow tube (2) and the thickness of trompil layer (1) are than being 0.5~0.7: 1, and hollow tube (2) along equidistant the arranging of trompil layer (1) hoop, pre -buried between the inner wall of inlayer (3) and hollow tube (2) have radial slip casting pipe (4). This secondary lining can resist the fault and glue the slide and move, reduces the fault movement to the destruction in tunnel, the shock resistance that effectively improves the tunnel with resist the fault and glue the ability that the slide moved destruction, and secondary lining can restore after destruction fast, and the restoration in tunnel is fast, and repair costs is low.

Description

A kind of secondary lining dynamic across the anti-stick slide in active fault tunnel

Technical field

This utility model relates to a kind of secondary lining dynamic across the anti-stick slide in active fault tunnel

Background technology

Along with a large amount of constructions of the acceleration of urbanization process, Tunnel Engineering, will inevitably run into the problem that tunnel construction crosses over active fault. Active fault refers to that those are newborn or have acknowledgement of consignment of adopting dynamic and displacement within modern age or period of history, and is likely to regeneration in the near future or continues the tomography of motion and displacement. The generation of earthquake and active fault have direct relation.

The active fault stick-slip changing of the relative positions is the provincialism geological disaster of a kind of Structural Characteristics of Cenozioc Faulted Structure, and it is the principal element that earthquake causes Cross-fault leveling tunnel structure heavy damage. The active fault stick-slip changing of the relative positions of sudden large deformation can make tomography produce three dimensions permanent deformation, has both the character of tension and compression, shearing, torsion and bending, and bigger fault movement amount is very big on Tunnel Engineering impact.

At present, fault viscosity-sliding changing of the relative positions underground pipelines Failure type and design measure is more, and the technology that the tunnel error resilience for passing through tomography is moved is less.

The stick-slip changing of the relative positions of active fault has the feature such as randomness, strong destructiveness, and the lower mechanical characteristic in tunnel of its effect, damage-form alter a great deal. Wherein the changing of the relative positions of active fault stick-slip is great on the impact in tunnel, under certain alternate displacement, reinforced concrete lining layer structure is often subject to flexural deformation, stretching, extruding and shear action, and structure can ftracture, particularly in comparatively heavy damage can occur near fault plane.

In recent years, under the active fault changing of the relative positions, the dynamic measure of the error resilience of tunnel structure mainly adopts flexible structure. Chinese patent application if application number is 200910058875.6 discloses one " shock resisting and reducing structure spanning movable fault tunnel ", it is to be provided with the vibration absorber extended along longitudinally-moving tomography both sides, tunnel at rock mass active fault position, and this vibration absorber is made up of the bubble concrete layer being filled between liner, outer lining. It utilizes flexible material (bubble concrete layer) to absorb the changing of the relative positions energy of earthquake, resists fault movement load.But, this deposits deficiency both ways: one is owing to arranging foam concrete, needs secondary at twice building, and efficiency of construction substantially reduces, and construction period increases; Two be lining cutting internal structure because of fault movement impaired after, it is necessary to damaged part is detected, then bored grouting, its damage after maintenance and reinforcement difficulty big.

Utility model content

The purpose of this utility model is to provide a kind of secondary lining dynamic across the anti-stick slide in active fault tunnel. This secondary lining can resist the fault viscosity-sliding changing of the relative positions, reduces the fault movement destruction to tunnel, is effectively improved the shock resistance in tunnel and the ability of opposing fault viscosity-sliding changing of the relative positions destruction; And this secondary lining can quickly repair after disruption, accelerate the reparation speed in tunnel, reduce rehabilitation cost.

This utility model realizes its purpose and be employed technical scheme comprise that, a kind of secondary lining dynamic across the anti-stick slide in active fault tunnel, including bracing frame stud horseshoe-shaped in horseshoe-shaped reinforced concrete floor, reinforced concrete floor, it is characterised in that:

In described reinforced concrete floor, the position beyond bracing frame stud is perforated layer, and the position within bracing frame stud is internal layer, and the thickness of internal layer is 0.3～0.5 times of armored concrete layer thickness; Being provided with longitudinal hollow pipe in described perforated layer, the diameter of hollow pipe is 0.25-0.4 times of perforated layer thickness; And hollow pipe is equally spaced along perforated layer hoop, its spacing is 1.5-2 times of hollow pipe diameter; Described internal layer is provided with Grouting Pipe radially, and one end of Grouting Pipe is connected with hollow pipe, the other end connects with the inwall of internal layer.

Further, hollow pipe of the present utility model is BDF pipe.

Further, the diameter of Grouting Pipe of the present utility model is 30～50mm, and the genesis analysis spacing of Grouting Pipe is 1.5～3m.

Compared with prior art, the beneficial effects of the utility model are:

The internal layer of first and second lining cutting is solid reinforced concrete structure, and outside is the perforated layer of porous. When tunnel structure bears normal working load, perforated layer transmission country rock load, internal layer plays main supporting role. By it have been experienced that, perforated layer that this utility model adopts and the diameter of thickness when hollow pipe of internal layer, it is ensured that the intensity of whole lining cutting, meet structural safety under normal operating condition.

Two, secondary lining is outside is perforated layer, forms the lining structure of " soft outside but hard inside ", and perforated layer forms the rigidity weakness band of lining cutting. The section rigidity of perforated layer is much smaller than the atresia reinforced concrete floor of internal layer, when the tomography generation stick-slip changing of the relative positions, the hollow pipe stress of perforated layer concentrates cracking, absorb changing of the relative positions deformation, reduce the active fault impact on tunnel reinforced concrete layer, thus being effectively increased the overall anti-stick slide kinetic force of Tunnel Second Lining.

Three, this utility model simple in construction, construction cost is low; Pre-buried injected hole in lining cutting, in maintenance and reinforcement process after shake, injected hole had both been easy to the observation of damaged part, it is possible to the hole place directly perforated layer shattered by injected hole carries out grouting and reinforcing, improve secondary lining bearing capacity, it is achieved the reparation easily and fast to tunnel.

This utility model can be built by the following method and form:

A, support stand stud is fixed in secondary lining mould, makes 0.3～0.5 times equal to secondary lining mould thickness of the distance of bracing frame stud and secondary lining mould inwall;

B, in secondary lining mould, colligation lining cutting circumferential reinforcement and lining cutting are longitudinally to reinforcing bar, and the position beyond secondary lining mould inner support stand stud arranges longitudinal hollow pipe, then are fixed on by metal binding wire by hollow pipe and support on stand stud;

C, by between Grouting Pipe colligation inwall and hollow pipe in secondary lining mould, make one end of Grouting Pipe be connected with hollow pipe, the other end connects with secondary lining mould inwall;

D, in secondary lining mould one-piece casting concrete, to obtain final product.

Below in conjunction with the drawings and specific embodiments, this utility model is described in further details.

Accompanying drawing explanation

Fig. 1 is the horizontal section structure schematic diagram of the secondary lining of the embodiment of the present invention.

Fig. 2 is the close-up schematic view of the part B of Fig. 1.

Fig. 3 is longitudinal section structure schematic diagram (the A-A sectional view of Fig. 1) of the secondary lining of the embodiment of the present invention.

Detailed description of the invention

Embodiment

Fig. 1-3 illustrates, a kind of detailed description of the invention of the present utility model is, a kind of secondary lining dynamic across the anti-stick slide in active fault tunnel, including bracing frame stud 8 horseshoe-shaped in horseshoe-shaped reinforced concrete floor, reinforced concrete floor, wherein:

In described reinforced concrete floor, the position beyond bracing frame stud 8 is perforated layer 1, and the position within bracing frame stud 8 is internal layer 3, and the thickness of internal layer 3 is 0.3～0.5 times of armored concrete layer thickness; Being provided with longitudinal hollow pipe 2 in described perforated layer 1, the diameter of hollow pipe 2 is 0.25-0.4 times of perforated layer 1 thickness; And hollow pipe 2 is equally spaced along perforated layer 1 hoop, its spacing is 1.5-2 times of hollow pipe 2 diameter; Described internal layer 3 is provided with Grouting Pipe 4 radially, and one end of Grouting Pipe 4 is connected with hollow pipe 2, the other end connects with the inwall of internal layer 3.

The hollow pipe 2 of this example is managed for BDF.

The diameter of the Grouting Pipe 4 of this example is 30～50mm, and the genesis analysis spacing of Grouting Pipe 4 is 1.5～3m.

This utility model can be built by the following method and form:

A, support stand stud 8 is fixed in secondary lining mould, makes 0.3～0.5 times equal to secondary lining mould thickness of the distance of bracing frame stud 8 and secondary lining mould inwall;

B, in secondary lining mould, colligation lining cutting circumferential reinforcement 5 and lining cutting are longitudinally to reinforcing bar 6, and the position beyond secondary lining mould inner support stand stud 8 arranges longitudinal hollow pipe 2, then is fixed on support stand stud 8 by hollow pipe 2 by metal binding wire 7;

C, by between Grouting Pipe 4 colligation inwall and hollow pipe 2 in secondary lining mould, make one end of Grouting Pipe 4 be connected with hollow pipe 2, the other end connects with secondary lining mould inwall;

Claims

1. across the secondary lining that the anti-stick slide in active fault tunnel is dynamic, including bracing frame stud (8) horseshoe-shaped in horseshoe-shaped reinforced concrete floor, reinforced concrete floor, it is characterised in that:

In described reinforced concrete floor, the position beyond bracing frame stud (8) is perforated layer (1), and the position within bracing frame stud (8) is internal layer (3), thickness is armored concrete layer thickness 0.3～0.5 times of internal layer (3); Being provided with longitudinal hollow pipe (2) in described perforated layer (1), the diameter of hollow pipe (2) is 0.25-0.4 times of perforated layer (1) thickness; And hollow pipe (2) is equally spaced along perforated layer (1) hoop, its spacing is 1.5-2 times of hollow pipe (2) diameter; Described internal layer (3) is provided with Grouting Pipe (4) radially, and one end of Grouting Pipe (4) is connected with hollow pipe (2), the other end connects with the inwall of internal layer (3).

2. a kind of secondary lining dynamic across the anti-stick slide in active fault tunnel according to claim 1, it is characterised in that: described hollow pipe (2) is managed for BDF.

3. a kind of secondary lining dynamic across the anti-stick slide in active fault tunnel according to claim 1, it is characterised in that: the diameter of described Grouting Pipe (4) is 30～50mm, and the genesis analysis spacing of Grouting Pipe (4) is 1.5～3m.