CN114109435B - Tunnel with noise reduction function and construction method thereof - Google Patents

Abstract

The application discloses tunnel with noise reduction function and construction method thereof, wherein the tunnel comprises: a tunnel wall located inside the tunnel; the first structural layer is positioned on the inner side of the tunnel wall and connected with the inner side of the tunnel wall; the second structural layer is positioned on the inner side of the first structural layer and is connected with the first structural layer; the sound absorption layer is positioned on the inner side of the second structural layer; the cavity is provided with an air inlet and an air outlet so as to form air flow in the cavity, particles are filled in the cavity, and the particles are configured to flow in the cavity along with the air flow. This application transmits the vibration of noise for the second structural layer through the sound absorbing layer, and the granule in the cavity can be regarded as the fluid under the drive of air current, and the vibration is at gap transmission, decay between the granule to the purpose of making an uproar falls in the realization.

Description

Tunnel with noise reduction function and construction method thereof

Technical Field

The application relates to the technical field of tunnel construction, in particular to a tunnel with a noise reduction function and a construction method thereof.

Background

Tunnels, particularly subway tunnels, are usually excavated by shield tunneling machines, and the excavated tunnels need to be supported and protected by tunnel walls. The noise reduction structure is required to be arranged in the tunnel before the tunnel is used, noise generated by a vehicle in the tunnel is reduced, and the noise reduction structure is used for reducing the influence of the noise on the outside.

However, the construction difficulty of the existing tunnel wall is high, the construction period is long, and the maintenance is inconvenient; and the noise reduction effect of the existing noise reduction structure is poor, so that the requirement of people on a low-noise living environment is difficult to meet.

Disclosure of Invention

The embodiment of the application provides a tunnel with a noise reduction function and a building method thereof, which can reduce the propagation of noise in the tunnel to the outside and reduce the influence of the noise on the outside, and the construction period is shortened by adopting a tunnel wall with a prefabricated structure.

In a first aspect, an embodiment of the present application provides a tunnel with a noise reduction function, including: a tunnel wall located inside the tunnel; the first structural layer is positioned on the inner side of the tunnel wall and connected with the inner side of the tunnel wall; the second structural layer is positioned on the inner side of the first structural layer and is connected with the first structural layer; the sound absorption layer is positioned on the inner side of the second structural layer; the cavity is provided with an air inlet and an air outlet so as to form air flow in the cavity, particles are filled in the cavity, and the particles are configured to flow in the cavity along with the air flow.

According to an embodiment of the application, the particles comprise waste concrete particles, the particles having a particle size of 10-1000 microns.

According to the embodiment of the application, a plurality of air inlets are uniformly distributed at the bottom of the cavity; the gas outlet is provided with a plurality of evenly distributed parts at the top of the cavity.

According to this application embodiment, air inlet and gas outlet all are equipped with the block.

According to the embodiment of the application, the second structural layer is an elastic layer, and the sound absorption layer is a flexible layer.

According to the embodiment of the application, the sound absorption layer comprises a first blind groove, a second blind groove and a third blind groove; the first blind grooves are arranged in parallel along the extending direction of the tunnel, are positioned on the inner side of the sound absorption layer, and are positioned on a plane vertical to the extending direction of the tunnel; the second blind grooves are arranged in parallel along the extending direction of the tunnel, are positioned on the inner side of the sound absorption layer, and form an included angle of 60 degrees with the plane where the first blind grooves are positioned; the third blind grooves are arranged in parallel along the extending direction of the tunnel, the third blind grooves are positioned on the inner side of the sound absorbing layer, the included angle between the plane where the third blind grooves are positioned and the plane where the first blind grooves are positioned is 60 degrees, and the included angle between the plane where the third blind grooves are positioned and the plane where the second blind grooves are positioned is 60 degrees.

According to the embodiment of the application, the first blind groove, the second blind groove and the third blind groove have a common point, and the first blind groove, the second blind groove and the third blind groove are communicated at the common point.

According to an embodiment of the application, the cavity further comprises a plurality of elastic tie bars, and the first structural layer and the second structural layer are connected through the elastic tie bars.

According to this application embodiment, still include air inlet pipeline, go out gas pipeline and air pump, air inlet pipeline and air inlet intercommunication, go out gas pipeline and gas outlet intercommunication, the air pump is located air inlet pipeline.

According to the embodiment of the application, the sound absorption structure further comprises a resonance rod, wherein the resonance rod is connected with the second structural layer, and penetrates through the sound absorption layer.

In another aspect, an embodiment of the present application further provides a method for building a tunnel with a noise reduction function, including the following steps:

the method comprises the following steps: digging to form a tunnel digging section with a circular cross section;

step two: building an environment-friendly concrete prefabricated wall on the excavation section of the tunnel;

step three: and constructing a first structural layer, a second structural layer and a sound absorption layer on the inner side surface of the environment-friendly concrete prefabricated wall in sequence to finish the construction of the tunnel with the noise reduction function.

Compared with the prior art, the application has at least one of the following beneficial effects:

A) the tunnel with function of making an uproar falls that this application embodiment provided transmits the vibration of noise for the second structural layer through the sound absorbing layer, and the granule in the cavity can be regarded as the fluid under the drive of air current, and the vibration is at gap transmission, decay between the granule to the purpose of making an uproar falls in the realization.

B) The tunnel with the function of making an uproar falls that this application embodiment provided, the sound absorbing layer itself that adopts also possesses the function of making an uproar, can further improve the effect of making an uproar.

C) According to the method for building the tunnel with the noise reduction function, the prefabricated tunnel wall is used in the building process, the building process of the tunnel wall is simplified, and the construction period is greatly shortened.

D) According to the method for building the tunnel with the noise reduction function, waste concrete is used in the building process of the prefabricated wall and the noise reduction structure layer, waste resources are recycled, and the method is green and environment-friendly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a tunnel with a noise reduction function according to a first embodiment of the present application.

Fig. 2 is an expanded schematic view of a sound absorbing layer of a tunnel having a noise reduction function according to a first embodiment of the present application.

Fig. 3 is a schematic structural view of an eco-concrete prefabricated wall according to a second embodiment of the present application.

Fig. 4 is a schematic cross-sectional view of an eco-concrete prefabricated wall according to a second embodiment of the present application.

Fig. 5 is a flowchart of a third embodiment of the present application.

Reference numerals:

1. a first wall; 11. a first connection portion;

2. a second wall; 21. a second connecting portion; 22. a third connecting portion; 23. a first fixing member;

3. a third wall; 31. a fourth connecting portion; 32. a fifth connecting part; 33. a second fixing member;

4. a fourth wall; 41. a sixth connecting portion;

5. a bearing table;

6. a first structural layer; 61. a cavity; 62. an air inlet; 63. an air outlet;

7. a second structural layer; 71. a resonant rod;

8. a sound absorbing layer; 81. a first blind slot; 82. a second blind slot; 83. and a third blind groove.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The embodiments will be described in detail below with reference to the accompanying drawings.

Relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.

In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that in the embodiment of the present application, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

First embodiment of the present application

Fig. 1 is a schematic cross-sectional view of a tunnel with a noise reduction function according to a first embodiment of the present application.

Referring to fig. 1, an embodiment of the present application provides a tunnel with a noise reduction function, including: a tunnel wall located inside the tunnel; the first structural layer 6 is positioned on the inner side of the tunnel wall and is connected with the inner side of the tunnel wall; a second structural layer 7 located inside the first structural layer 6 and connected to the first structural layer 6; the sound absorption layer 8 is positioned on the inner side of the second structural layer 7; wherein, a cavity 61 is arranged between the first structural layer 6 and the second structural layer 7, the cavity 61 is provided with an air inlet 62 and an air outlet 63, so that an air flow is formed in the cavity 61, the cavity 61 is filled with particles, and the particles are configured to flow in the cavity 61 along with the air flow.

It should be noted that, in the embodiment of the present application, the tunnel wall is a prefabricated wall, and during construction, after excavation of the tunnel is completed, the tunnel wall is first built on the tunnel excavation section by using the prefabricated wall, and then the noise reduction structure layer is arranged on the prefabricated wall, that is, the first structure layer 6, the second structure layer 7 and the sound absorption layer 8 are sequentially arranged, so that the tunnel is built into a tunnel with a noise reduction function. The prefabricated wall can shorten the construction period, improve the construction efficiency, is convenient to maintain and reduces the cost.

First structural layer 6 uses as the installation carrier of second structural layer 7 and sound absorbing layer 8, and first structural layer 6 can be dismantled with the tunnel wall and be connected, makes things convenient for the maintenance to the tunnel wall. The second structural layer 7 is connected to the first structural layer 6, and the first structural layer 6 and the second structural layer 7 form a hollow cavity 61. If the cross-sectional shape of the tunnel is circular or approximately circular, the cross-sectional shape of the cavity 61 is a sector ring or approximately sector ring. The cavity 61 is filled with particles, air flow is formed in the cavity 61 through the air inlet 62 and the air outlet 63, the particles flow along with the air flow, and the friction among the particles is reduced by the air flow, so that the particles in the cavity 61 can be used as fluid similar to quicksand. Complex and varied gaps can be formed between the particles.

The sound absorption layer 8 can absorb a part of noise and transmit the vibration of the noise to the second structural layer 7, the second structural layer 7 transmits the vibration to the cavity 61, and the vibration is gradually attenuated under the influence of the particles due to the complex and changeable gaps among the particles, so that the purpose of reducing the noise is achieved. In addition, the sound absorbing layer 8 is made of sound absorbing material, so that the noise can be further reduced.

The particles may be in the form of sand or the like, preferably the particles comprise waste concrete particles, and the waste concrete can be recycled. The particles have a size of 10-1000 microns in order that the particles can exhibit near-fluid behavior under the influence of the gas stream.

Further, referring to fig. 1, the plurality of air inlets 62 are uniformly distributed at the bottom of the cavity 61; the air outlet 63 is provided with a plurality of air outlets uniformly distributed on the top of the cavity 61. The plurality of air inlets 62 and the plurality of air outlets 63 enable a stable bottom-to-top airflow to be formed in the cavity 61, so that when the particles in the cavity 61 are characterized as fluid, the uniformity of the properties of the particles is higher, and the overall noise reduction capability is further improved.

Further, referring to fig. 1, the air inlet 62 and the air outlet 63 are provided with blocking nets for preventing particles from entering the air outlet 63 and the air inlet 62, so as to avoid blocking the air inlet 62 and the air outlet 63.

Further, referring to fig. 1, the second structural layer 7 is an elastic layer, and the sound absorption layer 8 is a flexible layer. The sound absorbing layer 8 is made of a flexible material, and a fiber board or a felt board may be used as an example. When sound is transmitted to the sound absorption layer 8, the flexible material deforms, and can absorb vibration of a part of noise, so that the noise is weakened; furthermore, the pores of the sound absorption layer 8 allow the noise to propagate back therein and to be attenuated, so that the noise is further reduced. Vibrations caused by noise penetrating the sound-absorbing layer 8 are transmitted into the cavity 61 through the second structural layer 7, and are further attenuated by the particles in the fluid state. The elastic second structural layer 7 can transmit the vibration of noise to the cavity 61 on the premise of ensuring the structural shape of the cavity 61, and then the vibration is weakened through particles in the cavity 61, so that the noise reduction effect is enhanced.

Fig. 2 is an expanded schematic view of a sound absorbing layer of a tunnel having a noise reduction function according to a second embodiment of the present application.

Further, referring to fig. 2, the sound absorbing layer 8 includes a first blind groove 81, a second blind groove 82, and a third blind groove 83; a plurality of first blind grooves 81 are arranged in parallel along the extending direction of the tunnel, the first blind grooves 81 are positioned on the inner side of the sound absorbing layer 8, and the plane of the first blind grooves 81 is vertical to the extending direction of the tunnel; a plurality of second blind grooves 82 are arranged in parallel along the extending direction of the tunnel, the second blind grooves 82 are positioned on the inner side of the sound absorbing layer 8, and the included angle between the plane where the second blind grooves 82 are positioned and the plane where the first blind grooves 81 are positioned is 60 degrees; the third blind grooves 83 are arranged in parallel along the extending direction of the tunnel, the third blind grooves 83 are located on the inner side of the sound absorbing layer 8, the included angle between the plane where the third blind grooves 83 are located and the plane where the first blind grooves 81 are located is 60 degrees, and the included angle between the plane where the third blind grooves 83 are located and the plane where the second blind grooves 82 are located is 60 degrees. The noise attenuation is further enhanced by providing the sound absorbing layer 8 with the first blind grooves 81, the second blind grooves 82, and the third blind grooves 83 to increase the travel of noise in the sound absorbing layer 8. The inner surface of the sound absorbing layer 8 is latticed by a plurality of first, second and third blind grooves 81, 82 and 83. Since the sound absorbing layer 8 has a fan-ring-shaped cross-sectional shape, and the inner surface thereof is a part of the side surface of the cylinder, the sound absorbing layer 8 has a rectangular stroke when the sound absorbing layer 8 is expanded into a flat surface. The plurality of first, second, and third blind grooves 81, 82, and 83 divide the rectangular sound absorbing layer 8. Due to the arrangement of the 60-degree angle, the noise is difficult to reflect out easily after entering the blind groove, so that the sound absorption effect is achieved, the reflection of the noise can be reduced, and the intensity of the noise inside the tunnel is reduced.

Further, the first, second and third blind grooves 81, 82 and 83 have a common point at which the first, second and third blind grooves 81, 82 and 83 communicate. The first blind groove 81, the second blind groove 82 and the third blind groove 83 are made to have a common point, so that after the sound absorbing layer 8 is divided, each small unit is an equilateral triangle, thereby further increasing the travel of noise propagating in the sound absorbing layer 8, and further enhancing the noise attenuation effect.

Further, the cavity 61 further includes a plurality of elastic tie bars, and the first structural layer 6 and the second structural layer 7 are connected by the elastic tie bars. It is considered that noise may be directly transmitted to the outside of the tunnel through the junction of the first structural layer 6 and the second structural layer 7. The first structural layer 6 and the second structural layer 7 are connected by the elastic connecting rod, so that noise propagated through the elastic connecting rod can be attenuated, and the influence of the noise on the outside of the tunnel can be further reduced.

Further, the tunnel with a noise reduction function in the embodiment of the present application further includes a resonance rod 71, the resonance rod 71 is connected to the second structural layer 7, and the resonance rod 71 penetrates through the sound absorption layer 8. The resonant rod 71 is used to transmit noise vibrations directly to the particles in the cavity 61 to reduce the reflection of noise in the tunnel and reduce the effect of noise on the tunnel.

It should be noted that the tunnel with the noise reduction function in the embodiment of the present application further includes an air inlet pipeline, an air outlet pipeline, and an air pump, where the air inlet pipeline is communicated with the air inlet 62, the air outlet pipeline is communicated with the air outlet 63, and the air pump is located in the air inlet pipeline. The air flow is pumped into the cavity 61 through the air inlet pipe by the air pump, so that a stable air flow can be formed in the cavity 61, and the particles in the cavity 61 are in the fluid property.

Compared with the prior art, the tunnel with the noise reduction function provided by the embodiment of the application transmits the vibration of noise to the second structural layer through the sound absorption layer, particles in the cavity can be regarded as fluid under the driving of airflow, and the vibration is transmitted and attenuated in gaps among the particles, so that the purpose of noise reduction is realized. In addition, the sound absorption layer also has the noise reduction function, and the noise reduction effect can be further improved.

Second embodiment of the present application

The application further discloses a prefabricated wall in the first embodiment of the application, and particularly discloses an environment-friendly concrete prefabricated wall.

Fig. 3 is a schematic structural view of an eco-concrete prefabricated wall according to a second embodiment of the present application. Fig. 4 is a schematic cross-sectional view of an eco-concrete prefabricated wall according to a second embodiment of the present application.

Referring to fig. 3 and 4, the eco-concrete prefabricated wall includes:

the cross section of the first wall 1 is in a sector ring shape, the first wall 1 comprises first connecting parts 11, and the first connecting parts 11 are positioned at two ends of the first wall;

the cross section of the second wall 2 is in a sector ring shape, at least two second walls 2 are connected with two ends of the first wall 1, the second wall 2 comprises a second connecting part 21 and a third connecting part 22, the first connecting part 11 is matched with the second connecting part 21, and at least part of the second connecting part 21 is positioned on the inner side of the first connecting part 11;

the cross section of the third wall 3 is in a fan-ring shape, at least two third walls 3 are respectively connected with one ends, far away from the first wall 1, of the at least two second walls 2, each third wall 3 comprises a fourth connecting portion 31 and a fifth connecting portion 32, the fourth connecting portions 31 and the fifth connecting portions 32 are respectively located at two ends of each third wall 3, the fourth connecting portions 31 are matched with the third connecting portions 22, and at least part of the third connecting portions 22 are located on the outer sides of the four connecting portions;

the cross section of the fourth wall 4 is in a fan-ring shape, and two ends of the fourth wall 4 are respectively connected with one ends of the at least two third walls 3 far away from the second wall 2; the fourth wall 4 comprises sixth connecting portions 41, the sixth connecting portions 41 are respectively positioned at two ends of the fourth wall 4, the sixth connecting portions 41 are matched with the fifth connecting portions 32, and at least part of the sixth connecting portions 41 are positioned at the inner sides of the fifth connecting portions 32;

the bearing table 5 is arched in cross section, the bearing table 5 is connected with the third wall 3 and the fourth wall 4, and the bearing table 5 covers the connection part of the fifth connecting part 32 and the sixth connecting part 41.

The environment-friendly concrete prefabricated wall is used as the inner wall of a tunnel with a circular or approximately circular cross section. The first wall 1, the second wall 2, the third wall 3 and the fourth wall 4 can be spliced to form a wall with a circular or approximately circular cross-sectional shape. The cross-sectional shapes of the first wall 1, the second wall 2, the third wall 3 and the fourth wall 4 are all fan-shaped rings, and the central angles corresponding to the fan-shaped rings are not limited, for example, in the embodiment of the present application, the central angles corresponding to the cross-sectional shapes of the first wall 1, the second wall 2, the third wall 3 and the fourth wall 4 are all 60 °, so that the second wall 2 and the third wall 3 have the same shape, and batch prefabrication is facilitated.

The first wall 1 is used as the roof of the tunnel wall, installed first. The number of the second walls 2 is at least two, wherein the two second walls 2 are respectively connected with two ends of the first wall 1 to form the upper half part of the tunnel wall. When the second wall 2 is mounted, the first connecting portion 11 of the first wall 1 is engaged with the second connecting portion 21 of the second wall 2, and at least a portion of the second connecting portion 21 is located inside the first connecting portion 11, thereby facilitating the mounting of the second wall 2. Further, when the first wall 1 applies pressure to the two second walls 2 by gravity after the installation of the entire tunnel wall is completed, the second connection portions 21 of the two second walls 2 press the first wall 1 in the horizontal direction, and since the first wall 1 can serve as a rigid structure, the first wall 1 and the second wall 2 can support each other to maintain the stability of the upper half of the tunnel wall.

For the same reason, the third wall 3 is installed after the second wall 2 is installed, the fourth connection portion 31 of the third wall 3 is fitted with the third connection portion 22 of the second wall 2, and at least a part of the fourth connection portion 31 is located inside the third connection portion 22.

The fourth wall 4 acts as the bottom of the tunnel wall and is finally installed. Therefore, the sixth connection part 41 of the fourth wall 4 is fitted with the fifth connection part 32 of the third wall 3, and at least a part of the sixth connection part 41 is located inside the fifth connection part 32. In addition, since the third walls 3 are pressed in the vertical direction by the second walls 2, the two third walls 3 press the fourth wall 4 in the horizontal direction, the fourth wall 4 supports the two third walls 3, the two third walls 3 support the two second walls 2, and the two second walls 2 support the first wall 1, thereby ensuring stable support of the entire wall.

The bearing platform 5 forms a tunnel for bearing the bottom surface of other objects, and if the tunnel is used as a subway or train tunnel, a track can be constructed on the bearing platform 5, and if the tunnel is used as a highway tunnel, a road surface can be constructed on the bearing platform 5. Considering that the fourth wall 4 may be lifted and separated if the overall pressure of the wall is too high, the carrier 5 covers the connection portion of the fifth connection portion 32 and the sixth connection portion 41, and the carrier 5 is fixedly connected to the third wall 3 and the fourth wall 4, so that the fourth wall 4 can be prevented from being lifted and separated, thereby ensuring the structural stability of the tunnel wall.

Before the tunnel wall is built, the first wall 1, the second wall 2, the third wall 3 and the fourth wall 4 can be prefabricated, then the prefabricated first wall 1, the second wall 2, the third wall 3 and the fourth wall 4 are transported into the tunnel, and the tunnel wall is built while tunneling, so that the structural stability of the tunnel is ensured. Because the first wall 1, the second wall 2, the third wall 3 and the fourth wall 4 can be prefabricated, the construction period can be greatly shortened, and the construction process is simplified.

Alternatively, referring to fig. 3 and 4, the first wall 1, the second wall 2, the third wall 3 and the fourth wall 4 are each a concrete slab, a concrete material includes cement, sand and aggregate, and the ratio of each component may be the ratio of concrete in the related art. Preferably, the aggregate comprises waste concrete, and the waste concrete accounts for 10-15% of the weight of the aggregate, so that the waste concrete is recycled, and the environment protection is facilitated. When the ratio is too high, the structural strength of the concrete may be affected, and when the ratio is too low, the utilization rate of the waste concrete is too low.

Further, the first wall 1 is located at the top of the tunnel, and further includes a vertical support mounting hole, which is located at the middle of the inner side of the first wall 1. When the first wall 1 is installed, the first wall 1 is supported by arranging the vertical support member because the first wall 1 is installed firstly and in a suspended state, and the first wall 1 is connected with the vertical support member through the vertical support member installation hole. It should be noted that the other end of the vertical support is connected to the bottom of the tunnel.

Further, the third walls 3 are provided with horizontal support mounting holes, the horizontal support mounting holes of at least two third walls 3 being located on the same horizontal plane. After installing the third wall 3, before installing the fourth wall 4, because vertical support has taken up the bottom in tunnel, need remove vertical support, in order to keep the distance between two third walls 3 constant when removing vertical support, so that the fourth wall 4 can install smoothly, support two third walls 3 through horizontal support, thereby the distance between two third walls 3 is fixed, make the fourth wall 4 can install smoothly. The third wall 3 is connected with a horizontal support by means of a horizontal support mounting hole.

Further, referring to fig. 3 and 4, the first connecting portion 11 is provided with a convex structure along the outer side of the arc extending direction of the first wall 1, so that the first connecting portion 11 forms a step structure along the arc extending direction of the first wall; the third connecting part 22 is provided with a convex structure along the outer side of the extension direction of the arc of the second wall 2, so that the third connecting part 22 forms a step structure along the extension direction of the arc of the second wall 2; the fifth connecting portion 32 is provided with a convex structure along the outer side of the extension direction of the arc of the third wall 3, so that the fifth connecting portion 32 forms a step structure along the extension direction of the arc of the third wall 3.

The fitting between the first connecting portion 11 and the second connecting portion 21, the fitting between the third connecting portion 22 and the fourth connecting portion 31, and the fitting between the fifth connecting portion 32 and the sixth connecting portion 41 each take the form of a stepped structure. Wherein the middle surface of the step structure coincides with the middle surfaces of the fan-ring shaped first wall 1, second wall 2, third wall 3 and fourth wall 4. In addition, the step structure can transmit acting force along the circumferential direction of the circular arc and can transmit acting force along the radial direction of the circular arc.

Further, referring to fig. 4, the precast concrete wall in an environment-friendly embodiment of the present application further includes first fixing pieces 23 arranged in pairs, the first fixing pieces 23 are located at a connection position of the first wall 1 and the second wall 2, the pair of first fixing pieces 23 are respectively located at an inner side and an outer side of the first wall 1, and both the first wall 1 and the second wall 2 are fixedly connected to the first fixing pieces 23. It is contemplated that relative rotation of the first wall 1 and the second wall 2 may occur at the junction of the first connection 11 and the second connection 21. By fixing the inner and outer first fixing pieces 23, the possibility of relative rotation of the first wall 1 and the second wall 2 can be reduced. Illustratively, the first fixing member 23 is provided with two first fixing through holes, the first connecting portion 11 is provided with a first through hole, and the second connecting portion 21 is provided with a second through hole. One of the first fixing through holes of the first fixing piece 23 is aligned with the first through hole, and the first fixing piece 23 on the inner side, the first connecting part 11 and the first fixing piece 23 on the outer side are sequentially connected through bolts; the other first fixing through hole of the first fixing member 23 is aligned with the second through hole and is connected in sequence by a bolt, the first fixing member 23 on the inner side, the second connecting portion 21 and the first fixing member 23 on the outer side.

Further, referring to fig. 4, the precast concrete wall in an environment-friendly embodiment of the present application further includes second fixing members 33 disposed in pairs, the second fixing members 33 are located at a connection position of the third wall 3 and the second wall 2, the pair of second fixing members 33 are respectively located at an inner side and an outer side of the second wall 2, and the third wall 3 and the second wall 2 are fixedly connected to the second fixing members 33. It is contemplated that relative rotation of the third wall 3 and the second wall 2 may occur at the connection of the third connection 22 and the fourth connection 31. By fixing the inner and outer second fixing pieces 33, the possibility of relative rotation of the third wall 3 and the second wall 2 can be reduced. Illustratively, the second fixing member 33 is provided with two second fixing through holes, the third connecting portion 22 is provided with a third through hole, and the fourth connecting portion 31 is provided with a fourth through hole. One of the second fixing through holes of the second fixing piece 33 is aligned with the third through hole, and the second fixing piece 33 on the inner side, the third connecting part 22 and the second fixing piece 33 on the outer side are sequentially connected through bolts; the other second fixing through hole of the second fixing member 33 is aligned with the fourth through hole, and is connected in sequence by a bolt, the second fixing member 33 on the inner side, the fourth connecting portion 31, and the second fixing member 33 on the outer side.

Further, the arc-shaped corresponding side surface of the bearing table 5 is attached to the inner sides of the fourth wall 4 and at least part of the third wall 3, and the bearing table 5 is fixedly connected with the fourth wall 4 and the third wall 3; the central axial plane of the carrier table 5 and the central axial plane of the fourth wall 4 are coplanar. The arc-shaped corresponding side of the carrier 5 abuts the inner side of the fourth wall 4 and at least part of the third wall 3, so that the carrier 5 can be in full contact with the inner side of the fourth wall 4. When the carrier table 5 is fixed with the fourth wall 4, the carrier table 5 can apply even pressure to the fourth wall 4, so that the fourth wall 4 can be held between the two third walls 3, thereby reducing the possibility of the fourth wall 4 from tilting out. In addition, the carrier 5 is also fixedly connected with the third wall 3, so that the connection between the third wall 3 and the fourth wall 4 can be more stable and reliable. In addition, the middle axial plane of the bearing table 5 and the middle axial plane of the fourth wall 4 are coplanar, so that the corresponding side surfaces of the arched chords of the bearing table 5 are kept horizontal, and a stable mounting carrier is provided for a road surface or a track.

Compared with the prior art, the environment-friendly concrete prefabricated wall provided by the embodiment of the application is provided with the tunnel wall through the first wall, the second wall, the third wall and the fourth wall, the first connecting portion is matched with the second connecting portion, the fourth connecting portion is matched with the third connecting portion, and the sixth connecting portion is matched with the fifth connecting portion, so that the construction process of the wall is simplified, the construction period is shortened, and the wall is convenient to maintain. And moreover, waste concrete is used in the process of constructing the prefabricated wall, so that waste resources are recycled, and the prefabricated wall is green and environment-friendly.

Third embodiment of the present application

Fig. 5 is a flow chart of a third embodiment of the present application.

Referring to fig. 5, the present embodiment provides a method for constructing a tunnel with a noise reduction function, which is used to construct a tunnel with a noise reduction function according to a first embodiment of the present invention, and an eco-concrete prefabricated wall according to a second embodiment of the present invention is used in the construction process.

A method for building a tunnel with a noise reduction function comprises the following steps:

the method comprises the following steps: excavating to form a tunnel excavation section with a circular cross section;

step two: building an environment-friendly concrete prefabricated wall on the excavation section of the tunnel;

step three: and constructing a first structural layer 6, a second structural layer 7 and a sound absorption layer 8 on the inner side surface of the environment-friendly concrete prefabricated wall in sequence to complete the construction of the tunnel with the noise reduction function.

In the first step, the tunnel is excavated according to the design of the tunnel, a shield machine and other machines can be adopted for excavating, and the cross section of the tunnel formed by excavating is circular or approximately circular.

In the second step, the concrete steps of building the environment-friendly concrete prefabricated wall on the tunnel excavation section are as follows:

s1, installing the first wall 1 on top of the tunnel, supporting the first wall 1 by vertical supports.

Since the first wall 1 is installed first, the first wall 1 is supported by a vertical support member, the other end of which is supported at the bottom of the tunnel, so that the first wall 1 is prevented from falling off the top of the tunnel.

S2, the second wall 2 is mounted on both ends of the first wall 1, and the second connection part 21 is engaged with the first connection part 11.

The first fixing member 23 is provided on the outer side of the first wall 1, the second wall 2 is connected to the first wall 1, the first fixing member 23 is provided on the inner side of the joint between the first wall 1 and the second wall 2, and the first connection portion 11 and the second connection portion 21 are fixed by the two first fixing members 23.

S3, the third walls 3 are attached to both ends of the two second walls 2, respectively, and the third connection portions 22 are engaged with the fourth connection portions 31.

The second fixing members 33 are provided on the outer sides of the two second walls 2, the second walls 2 are connected to the third wall 3, the second fixing members 33 are provided on the inner sides of the connection portions between the third wall 3 and the second walls 2, and the third connecting portions 22 and the second connecting portions 21 are fixed by the two second fixing members 33.

S4, mounting a horizontal support between the two third walls 3, and dismounting the vertical support.

After the third wall 3 is installed, the vertical support takes up installation space of the fourth wall 4, thus requiring disassembly of the vertical support. In order to prevent the displacement of the installed third and second walls 3, 2 and thus the installation of the fourth wall 4, a horizontal support is installed before the vertical support is removed.

S5, the fourth wall 4 is installed between the two third walls 3, and the fifth connection part 32 is fitted with the sixth connection part 41.

Mounting the fourth wall 4 directly between two third walls 3, the support of the third walls 3 by the fourth wall 4 can be converted into a support of the second walls 2 by the third walls 3 and thus into a support of the first walls 1 by the second walls 2.

S6, mounting the carrier 5, and connecting the third wall 3 and the fourth wall 4 with the carrier 5.

The carrier 5 is fixed to the third wall 3 and the fourth wall 4, and the fourth wall 4 can be prevented from being lifted and removed from between the two third walls 3.

And S7, disassembling the horizontal support member to finish the construction of the environment-friendly concrete prefabricated wall.

Furthermore, after the step two, the method further comprises the steps of: rails are installed or roads are laid on the bearing table 5 as required. The step can be before the third step, or after the fourth step, and the construction can be carried out simultaneously.

Compared with the prior art, the method for building the tunnel with the noise reduction function, provided by the embodiment of the application, has the advantages that the prefabricated tunnel wall is adopted, the building process of the tunnel wall is simplified, the construction period is greatly shortened, and in addition, waste concrete is used in the building process of the prefabricated wall and the noise reduction structure layer, so that the waste resource recycling is realized, and the green environmental protection is realized.

While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (7)

1. A tunnel with a noise reduction function, comprising:

a tunnel wall located at an inner side of the tunnel;

the first structural layer is positioned on the inner side of the tunnel wall and connected with the inner side of the tunnel wall;

the second structural layer is positioned on the inner side of the first structural layer and is connected with the first structural layer;

the sound absorption layer is positioned on the inner side of the second structural layer;

the resonance rod is connected with the second structural layer and penetrates through the sound absorption layer; a cavity is arranged between the first structural layer and the second structural layer, the cavity is provided with an air inlet and an air outlet so as to form air flow in the cavity, the cavity is filled with particles, and the particles are configured to flow in the cavity along with the air flow; the cavity further comprises a plurality of elastic connecting rods, and the first structural layer and the second structural layer are connected through the elastic connecting rods;

the sound absorption layer comprises a first blind groove, a second blind groove and a third blind groove; the first blind grooves are arranged in parallel along the extending direction of the tunnel, the first blind grooves are positioned on the inner side of the sound absorption layer, and the plane where the first blind grooves are positioned is vertical to the extending direction of the tunnel; the second blind grooves are arranged in parallel along the extending direction of the tunnel, the second blind grooves are positioned on the inner side of the sound absorption layer, and the included angle between the plane where the second blind grooves are positioned and the plane where the first blind grooves are positioned is 60 degrees; the plurality of third blind grooves are arranged in parallel along the extending direction of the tunnel, the third blind grooves are positioned on the inner side of the sound absorbing layer, the included angle between the plane where the third blind grooves are positioned and the plane where the first blind grooves are positioned is 60 degrees, and the included angle between the plane where the third blind grooves are positioned and the plane where the second blind grooves are positioned is 60 degrees;

the first blind groove, the second blind groove and the third blind groove have a common point, and the first blind groove, the second blind groove and the third blind groove are communicated at the common point.

2. The tunnel with noise reduction function of claim 1, wherein the particles comprise waste concrete particles, and the particle size of the particles is 10-1000 microns.

3. The tunnel with the noise reduction function according to claim 1, wherein a plurality of air inlets are provided and uniformly distributed at the bottom of the cavity; the gas outlet is provided with a plurality of evenly distributed parts at the top of the cavity.

4. The tunnel with the noise reduction function according to claim 2, wherein the air inlet and the air outlet are provided with blocking nets.

5. The tunnel of claim 1, wherein the second structural layer is an elastic layer, and the sound absorbing layer is a flexible layer.

6. The tunnel with the noise reduction function according to claim 1, further comprising an air inlet pipeline, an air outlet pipeline and an air pump, wherein the air inlet pipeline is communicated with the air inlet, the air outlet pipeline is communicated with the air outlet, and the air pump is located on the air inlet pipeline.

7. A method of constructing a tunnel with a noise reduction function according to any one of claims 1 to 6, comprising the steps of:

the method comprises the following steps: digging to form a tunnel digging section with a circular cross section;

step two: building an environment-friendly concrete prefabricated wall on the excavated section of the tunnel;

step three: and constructing a first structural layer, a second structural layer and a sound absorption layer on the inner side surface of the environment-friendly concrete prefabricated wall in sequence to finish the construction of the tunnel with the noise reduction function.

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