CN217813519U - Novel tunnel composite lining composite structure - Google Patents

Abstract

The utility model discloses a novel tunnel composite lining composite construction belongs to tunnel construction technical field, including just propping up waterproof construction, waterproof construction and two lining fixed knot construct, just prop up waterproof construction and set up in the bottom of tunnel inner wall, waterproof construction sets up in the bottom of just propping up waterproof construction, and two lining fixed knot construct and set up in waterproof construction's bottom. The corrugated steel structure is stable, excellent in durability, corrosion-resistant (galvanized), high in structural strength, light in dead weight, capable of being prefabricated and produced in large scale, convenient to construct and operate, short in construction period, economic, safe and environment-friendly; only when the second high polymer waterproof layer fails, the drainage system is utilized to drain the leakage water, so that the first time of maintenance of the tunnel by the leakage water in the operation period is effectively prolonged, the maintenance frequency is reduced, the influence on traffic is also reduced, and the damage degree of the tunnel caused by the vibration action of earthquakes and the like can be reduced again.

Description

Novel tunnel composite lining composite structure

Technical Field

The utility model relates to a tunnel construction technical field especially relates to a novel tunnel composite lining integrated configuration.

Background

The existing tunnel main tunnel lining is designed and constructed by adopting a composite lining according to the new Austrian's law principle, a steel arch frame, an anchor rod, a reinforcing mesh and sprayed concrete are used as primary supports, and cast concrete or reinforced concrete is used as secondary supports, so that a permanent bearing structure is formed.

Primary support: for the V-grade and IV-grade surrounding rocks, the steel arch truss is composed of an I-shaped steel arch frame, anchor rods, a reinforcing mesh and sprayed concrete; for the third-level surrounding rock, the radial anchor rods, the reinforcing mesh and the sprayed concrete are generally used, and for part of the third-level surrounding rock sections, a grid arch frame support is arranged for primary support; the steel arch frames are connected by longitudinal steel bars and welded with the steel bar meshes into a whole to be closely attached to surrounding rocks to form a bearing structure, and an anchor backing plate must be arranged at the tail of the anchor rod of the system and fixed on the steel bar meshes. For V-level shallow buried and fault fracture zone sections, the connection parts of the circumferential I-shaped steels are longitudinally connected by 2I-14I-shaped steels, so that the overall rigidity and stability of the arch frame are enhanced; the middle rock clamping in the V-level surrounding rock section of the small-clear-distance tunnel is reinforced and supported by a low-prestress D25 hollow grouting anchor rod, and the middle rock clamping is reinforced by grouting through a phi 50X 4mm small guide pipe. Secondary lining: because the tunnel is a three-lane tunnel, the excavation span is large, and the V-level surrounding rock and the IV-level surrounding rock are both of reinforced concrete structures, so that the safety of the tunnel supporting structure is ensured. The reasonable construction time of the secondary lining is finally determined (checked) according to the construction monitoring and measuring data, and the bearing capacity of the primary support is exerted as much as possible but cannot be exceeded.

In the tunnel with small clear distance and large soft rock deformation, the traditional construction structure is used in a high-intensity earthquake area to often cause leakage, and the primary support is damaged and broken due to vibration, so that the difficulty of secondary lining is increased, the construction period is greatly prolonged, and a composite lining combined structure needs to be designed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel tunnel composite lining integrated configuration solves the tunnel of current country rock grade III level and above and the seepage appears easily, the longer technical problem of time limit for a project.

The utility model provides a novel tunnel composite lining integrated configuration, includes just props up waterproof construction, prevents drainage structures and two lining fixed knot construct, just props up waterproof construction and sets up in the bottom of tunnel inner wall, prevents that drainage structures sets up in the bottom of just propping up waterproof construction, and two lining fixed knot construct and set up in the bottom of preventing drainage structures.

Furthermore, the scheme further comprises a plurality of stress anchor cables, wherein the stress anchor cables are arranged inside the inner wall of the tunnel and are arranged at the front end of the primary waterproof structure.

Further, the primary waterproof structure comprises a first waterproof layer, a primary corrugated steel plate, a primary mixed soil layer and a second waterproof layer, the first waterproof layer is arranged at the bottom of the stress anchor cables, the primary corrugated steel plate is arranged at the bottom of the first waterproof layer, the primary mixed soil layer is arranged at the bottom of the first waterproof layer and is buried in the primary corrugated steel plate, and the second waterproof layer is arranged at the bottom of the primary mixed soil layer.

Further, the primary corrugated steel plate is arranged as a wave structure plate, primary corrugated steel plate anchor bars are arranged on the inner side of the concave structure of the wave structure plate, and the primary corrugated steel plate anchor bars are perpendicular to the concave structure.

Furthermore, the waterproof and drainage structure is formed by combining a waterproof material and a drainage pipe, wherein the drainage material is made of green materials such as waterproof coiled materials.

Furthermore, the two-lining fixed structure comprises two lining concrete layers and two lining corrugated steel plates, wherein the two lining corrugated steel plates are provided with two lining corrugated steel plate anchor bars, and the two lining concrete layers are embedded with the two lining corrugated steel plates and the two lining corrugated steel plate anchor bars.

The utility model adopts the above technical scheme, the utility model discloses following technological effect has:

the utility model has the advantages of stable corrugated steel structure, excellent durability, corrosion resistance (galvanization), high structural strength, light dead weight, mass prefabricated production, convenient construction operation, short construction period, economy, safety and environmental protection; only when the second high polymer waterproof layer became invalid, just utilize the drainage system of preventing to discharge the percolating water, effectively prolonged the time of the first percolating water maintenance of operation period tunnel, reduced maintenance frequency, also reduced the influence to the traffic, and can reduce once more the destruction degree that vibrations such as earthquake etc. brought for the tunnel, two linings utilize high strength corrugated steel plate to make tunnel two lining structures, and concreting, the construction is convenient fast, effectively shorten the time limit, also can utilize prefabricated section of jurisdiction to assemble fast.

Drawings

Fig. 1 is a sectional structure view of the present invention.

Reference numbers in the figures: 1-a first waterproof layer; 2-primary support corrugated steel plate; 3-primary branch mixed clay layer; 4-primary support corrugated steel plate anchor bars; 5-a second waterproof layer; 6-a drainage layer; 7-two lining concrete layers; 8-two lined corrugated steel sheets; 9-two lining corrugated steel plate anchor bars.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more clear, preferred embodiments are described in detail. However, it should be noted that the numerous details set forth in the description are merely intended to provide a thorough understanding of one or more aspects of the invention, even though such aspects of the invention may be practiced without these specific details.

The utility model provides a novel tunnel composite lining integrated configuration, as shown in figure 1, including just propping up waterproof construction, waterproof drainage structure and two lining fixed knot construct, just prop up waterproof construction and set up in the bottom of tunnel inner wall, waterproof drainage structure sets up in the bottom of just propping up waterproof construction, and two lining fixed knot construct and set up in waterproof drainage structure's bottom. Still include a plurality of stress anchor rope, a plurality of stress anchor rope sets up in the inside of tunnel inner wall to set up at the front end of just propping up waterproof construction. A waterproof construction is supported and is mainly used initial support and waterproof effect just, prevents that drainage structures is used for when a waterproof construction inefficacy just, can directly discharge water, prevents that water from causing the influence to the tunnel driving. The two-lining fixing structure mainly plays a role in reinforcing and fixing and also has a permanent supporting function in a design period.

The embodiment of the utility model provides an in, just prop up waterproof construction includes first waterproof layer 1, just prop up corrugated steel plate 2, just prop up muddy soil layer 3 and second waterproof layer 5, and first waterproof layer 1 sets up the bottom at a plurality of stress anchor rope, just prop up corrugated steel plate 2 and set up in the bottom of first waterproof layer 1, just prop up muddy soil layer 3 and set up in the bottom of first waterproof layer 1 to bury just prop up corrugated steel plate 2, second waterproof layer 5 sets up in the bottom of just propping up muddy soil layer 3. For a high-intensity earthquake area, the first waterproof layer 1 and the second waterproof layer 5 belong to non-aqueous reaction high polymers, belong to flexible structures, and can be used as a first waterproof structure and have a shock insulation effect.

The embodiment of the utility model provides an in, just prop up corrugated steel plate 2 and set up to wave structure board, wave structure board's concave type structure inboard is provided with just a corrugated steel plate anchor bar 4, just props up corrugated steel plate anchor bar 4 and sets up with concave type structure is perpendicular. The primary support corrugated steel plate 2 is of a wave structure, has a better fixing effect, and has an elastic fixing effect in the horizontal direction.

The embodiment of the utility model provides an in, prevent that drainage structures sets up to drainage blanket 6, and drainage blanket 6 is formed by combined waterproof material and drain pipe, prevents that drainage structures comprises drainage material and drain pipe, and drainage material has green materials such as waterproofing membrane. Only when the second high polymer waterproof layer fails, the drainage system is utilized to drain the leakage water, so that the first time of maintenance of the tunnel by the leakage water in the operation period is effectively prolonged, the maintenance frequency is reduced, the influence on traffic is also reduced, and the damage degree of the tunnel caused by the vibration action of earthquakes and the like can be reduced again.

The embodiment of the utility model provides an in, two lining fixed knot construct including two lining concrete layer 7 and two lining corrugated steel plate 8, are provided with two lining corrugated steel plate anchor bars 9 on two lining corrugated steel plate 8, and two lining concrete layer 7 bury two lining corrugated steel plate 8 and two lining corrugated steel plate anchor bars 9.

The concrete construction process is as follows: tunnel advance support, the excavation, the anchor spouts the net (to the soft rock tunnel of big deformation, can adopt prestressed anchorage cable), first waterproof shock insulation layer (non-aqueous reaction high polymer, flexible construction), first prop up: corrugated steel (welded with anchor bars) + concrete structure, a second waterproof shock insulation layer (non-aqueous reaction polymer, flexible structure) + waterproof and drainage system (common in tunnel), secondary lining: corrugated steel (welded with anchor bars) and concrete (or prefabricated pipe pieces).

The construction sequence is as follows: (1) Pre-reinforcing the tunnel face in advance, and excavating according to the construction process; (2) For the soft rock large deformation tunnel, a prestressed anchor cable is arranged; (3) making a first waterproof shock insulation layer; (4) The method comprises the following steps of (1) installing a corrugated steel plate by using an intelligent assembling trolley, welding anchor bars on the corrugated steel plate to enhance the effect of combined action with concrete, pouring concrete in a gap between the corrugated steel plate and a first waterproof layer, and performing bolt staggered joint splicing on the corrugated steel plate in the transverse direction and the longitudinal direction; (5) making a second waterproof shock insulation layer and a waterproof and drainage system; (6) The intelligent assembling trolley is utilized to install the corrugated steel plate or the prefabricated duct piece, the anchor bars are welded on the corrugated steel plate, the effect of the combined action of the anchor bars and concrete is enhanced, the concrete is poured in the gap between the corrugated steel plate and the second waterproof layer, and the corrugated steel plate is transversely and longitudinally spliced in a staggered mode through bolts.

Operability: (1) Constructing advance support, excavation, anchor spraying net and the like according to the conventional method; (2) For a soft rock large-deformation tunnel, a pre-stressed anchor cable can replace a vault anchor rod; (3) According to design requirements, corrugated steel is prefabricated, an intelligent assembling trolley is utilized for facilitating installation and grouting behind walls, and trolley templates are utilized for pouring concrete; (4) using grouting equipment as a waterproof shock insulation layer; (5) water-proof and drainage system: constructing according to the design; (6) The corrugated steel plate is installed and the wall is grouted by the intelligent assembling trolley, concrete is poured by trolley templates, or the duct piece is assembled and the wall is grouted by the two-lining intelligent assembling trolley.

Energy-absorbing stock + shock insulation layer reduce the influence that tunnel blasting and adjacent tunnel blasting produced the lining structure, utilize corrugated steel quick concatenation, slip casting simultaneously, in time seal the excavation section, guarantee construction safety. This tunnel has outstanding antiseep function, utilizes two-layer waterproof shock insulation layer and a waterproof system, can solve the tunnel operation period seepage problem.

Claims (6)

1. The utility model provides a novel tunnel composite lining integrated configuration which characterized in that: including just propping up waterproof construction, waterproof drainage structure and two lining fixed knot construct, just prop up waterproof construction and set up in the bottom of tunnel inner wall, waterproof drainage structure sets up in the bottom of just propping up waterproof construction, and two lining fixed knot construct settings in waterproof drainage structure's bottom.

2. The novel tunnel composite lining composite structure of claim 1, wherein: still include a plurality of stress anchor rope, a plurality of stress anchor rope sets up in the inside of tunnel inner wall to the setting is at the front end of just propping up waterproof construction.

3. The novel tunnel composite lining composite structure of claim 2, wherein: the primary waterproof structure comprises a first waterproof layer (1), a primary corrugated steel plate (2), a primary mixed soil layer (3) and a second waterproof layer (5), wherein the first waterproof layer (1) is arranged at the bottom of a plurality of stress anchor cables, the primary corrugated steel plate (2) is arranged at the bottom of the first waterproof layer (1), the primary mixed soil layer (3) is arranged at the bottom of the first waterproof layer (1) and is embedded in the primary corrugated steel plate (2), and the second waterproof layer (5) is arranged at the bottom of the primary mixed soil layer (3).

4. The novel tunnel composite lining composite structure of claim 3, wherein: the primary corrugated steel plate (2) is arranged to be a wave structure plate, the primary corrugated steel plate anchor bars (4) are arranged on the inner side of the concave structure of the wave structure plate, and the primary corrugated steel plate anchor bars (4) are perpendicular to the concave structure.

5. The novel tunnel composite lining composite structure of claim 4, wherein: the waterproof and drainage structure is provided with a drainage layer (6), and the drainage layer (6) is formed by combining a concrete waterproof material and a drainage pipe.

6. The novel tunnel composite lining composite structure of claim 5, wherein: the two-lining fixing structure comprises two lining concrete layers (7) and two lining corrugated steel plates (8), wherein two lining corrugated steel plate anchor bars (9) are arranged on the two lining corrugated steel plates (8), and the two lining corrugated steel plates (8) and the two lining corrugated steel plate anchor bars (9) are embedded in the two lining concrete layers (7).

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