CN213205695U

CN213205695U - Tunnel secondary lining section plug structure

Info

Publication number: CN213205695U
Application number: CN202021456304.6U
Authority: CN
Inventors: 李光见
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2021-05-14
Anticipated expiration: 2030-07-22

Abstract

The utility model discloses a tunnel secondary lining section plug structure, the secondary lining trolley end mould and the inner side middle position of the primary lining are provided with a middle-buried water stop, the inner sides of the middle-buried water stop and the primary lining are filled with a foam sponge module, the foam sponge module is laid in a flat shape or in a Z shape, the foam sponge module is composed of protective cloth and an elastic strip, and the protective cloth is wrapped on the outer surface of the elastic strip; the plug installation adopts the foam sponge module, has pliability and elastic deformation, the characteristic of easy bending, folding, shrink, has more flexibility and maneuverability, and continuous reuse rate is high, levels the continuous overlapping type zigzag and overlaps the mixed installation in succession, effectively solves prior art and uses flitch or plank to the tunnel two lining section plug installation, meets the defect that the reinforcing bar position need disappear, and the material loss is big, leaks the concrete and needs geotechnological cloth caulking.

Description

Tunnel secondary lining section plug structure

Technical Field

The utility model belongs to the technical field of two lining construction design in the tunnel, concretely relates to two lining section end cap structures in tunnel.

Background

The water diversion engineering comprises a water diversion tunnel, a tunnel secondary lining construction needs a two-lining trolley, the two-lining trolley is a steel-mould-free plug, the other is a semi-steel-mould plug, the plug installation construction is carried out by using battens or boards, the two-lining trolley is rarely adopted for a van-type subway tunnel and an underground station, generally, steel pipe frame formwork construction is carried out, a bottom plate, a continuous shear wall secondary lining and a cast-in-place plate section plug are installed by using battens or formworks, the tunnel constructed in China before is mainly constructed by using plain concrete, namely, concrete without using steel bars is adopted for the secondary lining construction, currently, the reinforced concrete is generally adopted along with the improvement of the tunnel construction quality requirement, and the tunnel secondary lining is adopted by using plain concrete.

The phenomenon of overleap can appear in two lining excavations and the first lining, and will ligature two-layer reinforcing bar, section end cap distribution reinforcing bar has extra long continuous reinforcement, mounting material adopts flitch or plank, every flitch or plank all need the wedge to fix and install on two lining platform truck end closure boards, section end cap flitch or plank installation will be through two-layer ligature reinforcing bar, the flitch or plank installation will disappear when meetting the reinforcing bar, otherwise there is the gap to leak the concrete, need geotechnological cloth caulking, it is very big to the timber loss, continuous reuse rate is less than 80%. The construction method has the defects that after the concrete is poured by the two linings, the buried water stop in the construction joint of the section plug can be contained in the concrete, a crowbar is required to pry out, the buried water stop is uneven and not centered, the buried water stop is not normalized on the same arc line, the waterproof and water stop functions of the buried water stop are lost, the plug is installed or removed, the construction progress is slow, and the efficiency is low;

the semi-steel mold plug is designed in such a way that the steel mold plug is fixed on the end head of a trolley, reinforcing steel bars do not exceed the plug position, distributed reinforcing steel bars do not have extra-long continuous reinforcing steel bars, a buried water stop belt is installed in a standard manner, but the buried water stop belt is taken to a position between primary linings, the inner layer of a section plug is also installed by using battens or boards, because the tunnel excavation and the primary linings can generate an over-shortage phenomenon, the next group of installed battens or boards are short if not long, concrete leakage is easy to occur due to poor stability, the repeated utilization rate of the battens or boards is extremely low, the battens or boards are mostly used in a disposable mode, and the construction progress;

the construction of a box-type subway tunnel and a second lining of an underground station is generally to be carried out by erecting a steel pipe frame formwork, a bottom plate, a second lining continuous shear wall and a cast-in-place plate are provided with continuous steel bars, a section plug construction joint is to be installed with a buried water stop belt or a water stop steel plate, the section plug is installed by adopting a batten or a template in the existing construction method, when the batten or the template meets the continuous steel bars, concrete is leaked, a wire mesh or a fish scale mesh is required for plugging, some plugs are formed by foam rubber, the concrete thickness of each section plug is different, the loss of construction materials for installing the batten or the template is very large, the repeated utilization rate is very low, the installation and the dismantling are very slow, the construction efficiency is low, the wire mesh or the fish scale mesh is difficult to.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two lining section end cap structures in tunnel to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the tunnel secondary lining section plug structure comprises a primary lining, wherein a secondary lining trolley end die is arranged inside the primary lining, a buried water stop belt is arranged at the middle position of the inner side of the secondary lining trolley end die and the primary lining, a foam sponge module is filled in the buried water stop belt and the inner side of the primary lining, and the foam sponge module is laid in a flat shape or in a Z shape.

Preferably, the foam sponge module is composed of protective cloth and an elastic strip, the protective cloth is wrapped on the outer surface of the elastic strip, and the elastic strip is in a long strip shape.

Preferably, the protective cloth is made into a hollow cylindrical shape by sewing, and two ends of the protective cloth are closed by sewing; and an observation hole is formed between the primary lining and the top of the two-lining trolley end head die.

Preferably, steel mould plugs are arranged on the inner sides of the two-lining trolley end head mould and the embedded water stop belt.

Preferably, the protective cloth is one of tarpaulin and canvas, and can also be a water pumping hose; the elastic strip is one of a rubber-plastic sponge plate and a foam sponge plate.

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

the installation of the plug adopts the foam sponge module, which has the characteristics of flexibility, elastic deformation, easy bending, folding and shrinking, has more flexibility and operability, high continuous repeated utilization rate and smooth overlapped Z-shaped continuous overlapping mixed installation, effectively solves the defects that the prior art uses battens or wood boards to install the plug of the secondary lining section of the tunnel, the position of a steel bar needs to be eliminated, the material loss is large, the concrete leakage needs to be blocked by geotextile, overcomes the defects of irregular installation and low construction efficiency of a buried water stop, fills the rubber-plastic sponge module in a pipe strap, fills the foam sponge module in the pipe strap, the method can be used for mounting and constructing the section plugs of the secondary lining of the tunnel, and can also be used for mounting and constructing the section plugs of the bottom plate, the continuous shear wall and the cast-in-place plate of a box type subway tunnel or an underground station, and the construction method is similar and has the advantages that the design of the prior art is difficult to reach.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a front view of the foam sponge module of the present invention;

fig. 3 is a cross-sectional view of the foam sponge module of the present invention;

in the figure: 1. primary lining; 2. burying a water stop in the water tank; 3. a second liner trolley end die; 4. a steel mould plug; 5. a foam sponge module; 51. protective cloth; 52. an elastic strip; 6. and (6) observing holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution: a tunnel secondary lining section plug structure comprises a primary lining 1, a secondary lining trolley end die 3 is arranged inside the primary lining 1, a middle embedded water stop belt 2 is arranged at the middle position of the inner sides of the secondary lining trolley end die 3 and the primary lining 1, a foam sponge module 5 is filled inside the middle embedded water stop belt 2 and the primary lining 1, the foam sponge module 5 is laid in a flat shape or in a Z shape, the plug is installed by adopting the foam sponge module 5, has the characteristics of flexibility, elastic deformation, easy bending, folding and shrinking, has higher flexibility and operability, has high continuous repeated utilization rate, is installed in a flat overlapped Z shape and is continuously overlapped and mixed, effectively solves the problems that the tunnel secondary lining section plug is installed by using a wood or a wood board in the prior art, the defects that the position of a steel bar needs to be eliminated, the material loss is large, concrete leakage needs to be plugged by geotechnical cloth, and the foam sponge module 5 consists of protective cloth 51 and an elastic strip 52, the protective cloth 51 is wrapped on the outer surface of the elastic strip 52, and the elastic strip 52 is in a long strip shape.

In this embodiment, preferably, the protective cloth 51 is made into a hollow cylindrical shape by sewing, and both ends of the protective cloth 51 are closed by sewing; an observation hole 6 is formed between the primary lining 1 and the top of the secondary lining trolley end head die 3.

In this embodiment, preferably, the steel mold plugs 4 are installed on the inner sides of the two-lining trolley end mold 3 and the buried water stop 2.

In this embodiment, preferably, the protective cloth 51 is one of tarpaulin and canvas, and a water pumping hose may also be used; the elastic strip 52 is one of a rubber-plastic sponge plate and a foam sponge plate.

The utility model discloses a theory of operation and use flow: when the utility model is used, after the two-lining trolley is in place, the middle-buried water stop belt 2 is arranged at the middle position of the end head die 3 of the primary lining 1 and the two-lining trolley, the inside and the outside are centered as much as possible, and on the same arc line of the plug, then the foam sponge module 5 is used, wherein the foam sponge module 5 can also be used as a water pumping pipe belt, the flat overlapped installation or the zigzag continuous overlapping is carried out on the end head die 3 of the two-lining trolley, the middle-buried water stop belt 3 is arranged from bottom to top on the left side die and the right side die, the end head die 3 of the two-lining trolley is used as an installation platform to the outer steel bar position, the inside is arranged from the middle position between the middle-buried water stop belt 2 and the primary lining 1, the arch crown center position is left 500-1000 mm wide without installation, so as an observation hole 6 when concrete is poured; the foam sponge module 5 is squeezed and compressed by hands as much as possible during installation, and the foam sponge module 5 has the characteristics of flexibility and elastic deformation, can be bent, folded and shrunk at will, and has low extrusion extensibility, and the technical characteristics of no need of cutting during installation, stability and reliability, capability of eliminating gaps at a steel bar position, no need of using geotextile for seam plugging, and effective solving the troubles of tunnel section plug excavation and primary lining 1 over-shortage phenomenon; the reinforcing needs to be performed by alternately pressing a back side and a foam sponge module 5 outside, and the embedded water stop 2 is installed inside and outside the boundary, because the foam sponge module 5 has flexibility and elastic deformation, is easy to bend, has no mechanical property of bending resistance of a batten or a plank, is difficult to bear the pushing load during pouring of secondary lining concrete, and in order to achieve the mechanical index, the maximum interval vacancy of the reinforcing is alternately installed between the back side and the foam sponge module and cannot exceed 80mm, and the reinforcing is performed by pressing the outside of the back side by using a steel bar or a steel pipe, which is similar to the existing reinforcing mode; the two-lining trolley adopts a semi-steel mould plug 4, a middle embedded water stop 2 is installed and fixed on the semi-steel mould plug 2 along the upper surface of an arc line, no extra length is reserved on section distribution steel bars, 500-1000 mm extra length can be reserved on the section plug inner layer distribution steel bars at the time of construction and binding of the two-lining layer distribution steel bars, the integral structure of two-lining concrete is improved, the construction and the reinforcement of the section plug are more convenient, a foam sponge module 5 is installed between the middle embedded water stop 2 and a waterproof plate of a primary lining 1, the foam sponge module 5 is installed and reinforced at the same time so as to prevent the foam sponge module 5 from shifting, loosening and instability, a hole 6 is reserved at the central position of a top arch, the outside is crossed and reinforced with a back side, the gap between the back side and the back side is not more than 80mm, then the reinforcing is pressed by using steel bars or steel pipes, the reinforcing bars can be welded on the distribution steel bars in a circumferential direction, the use amount of the wood wedge is greatly saved, the construction efficiency is extremely high, and the wood wedge is easy to master by the prior art; the foam sponge module 5 can also be installed on a box-type subway tunnel, an underground station bottom plate, a two-lining continuous shear wall and a cast-in-place plate section plug, the construction mode is similar, the phenomenon of concrete leakage in gaps can not occur when continuous steel bars are met, no wire netting or fish scale net sheets are needed, the foam sponge blocks the gaps, the installation and the removal construction are quick, and the practicability and the operability are high; after the secondary lining concrete of the tunnel is poured, reversely reversing the sequence to remove the plugs, removing reinforcing steel bars or steel pipes, removing the back, pulling out the foam sponge module 5, and constructing the next group of secondary lining section plugs for reuse; the buried water stop belts of the two-lining section concrete construction joints after being dismantled are centered and flat and are on the same arc line, so that the cost of construction materials is reduced, and the construction efficiency and quality are improved.

It is worth noting that: the two-lining trolley end die 3 and the inner side of the buried water stop 2 can be installed in a Z shape by using a foam sponge block, the same effect can be achieved, the design length of the foam sponge module 5 is preferably two to three meters, the width is preferably 100 to 120mm, the overlapping thickness is preferably 30 to 40mm, and the length, the width and the thickness of the foam sponge module can be changed based on the technical design requirement.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Two lining section end cap structures in tunnel, including just lining (1), the inside of just lining (1) is provided with two lining platform truck end mould (3), two lining platform truck end mould (3) with bury waterstop (2) in the inboard intermediate position department of just lining (1) installs, its characterized in that: the inner sides of the middle-buried water stop (2) and the primary lining (1) are filled with foam sponge modules (5), and the foam sponge modules (5) are laid in a flat shape or in a Z shape.

2. The tunnel secondary lining section plug structure of claim 1, wherein: the foam sponge module (5) is composed of protective cloth (51) and elastic strips (52), the protective cloth (51) is wrapped on the outer surfaces of the elastic strips (52), and the elastic strips (52) are long-strip-shaped.

3. The tunnel secondary lining section plug structure of claim 2, wherein: the protective cloth (51) is made into a hollow cylindrical shape by sewing, and two ends of the protective cloth (51) are closed by sewing; an observation hole (6) is formed between the primary lining (1) and the top of the secondary lining trolley end head die (3).

4. The tunnel secondary lining section plug structure of claim 1, wherein: and a steel mould plug (4) is arranged on the inner sides of the two-lining trolley end head mould (3) and the embedded water stop belt (2).

5. The tunnel secondary lining section plug structure of claim 2, wherein: the protective cloth (51) is tarpaulin or canvas or a water pumping water belt; the elastic strip (52) is a rubber-plastic sponge plate or a foam sponge plate.