1. The tunnel foamed aluminum plate and secondary lining concrete integral casting construction method is characterized by comprising the step of using a specially-made connecting piece for matching construction, wherein the connecting piece comprises a first member and a second member, the first member is of a columnar structure, a threaded hole is formed in the first member, convex grains are arranged on the outer surface of the first member, the second member is of a panel structure and is vertically connected with the end part of the first member, a first through hole and a second through hole corresponding to the threaded hole are formed in the second member, and the construction method comprises the following steps:

step S1: one surface of the foamed aluminum plate is attached to one surface, far away from the first member, of the second member, and the foamed aluminum plate is fixedly connected with the connecting piece through the matching of the screws and the first through holes;

step S2: attaching the other surface of the foamed aluminum plate to the trolley panel, and fixedly connecting the trolley panel, the foamed aluminum plate and the connecting piece through the matching of the bolt and the threaded hole in the first member;

step S3: positioning the trolley and constructing a second lining;

step S4: and (4) removing the bolts and performing surface treatment.

2. The tunnel foamed aluminum plate and secondary lining concrete integral casting construction method according to claim 1, wherein the outer surface of the first member is provided with external threads.

3. The tunnel foamed aluminum plate and secondary lining concrete block pouring construction method according to claim 2, further comprising a process of checking the flatness of the joint between the foamed aluminum plate and the trolley panel between the step S2 and the step S3.

4. The cast-in-place construction method for tunnel foamed aluminum plate and secondary lining concrete according to claim 3, wherein the surface treatment in the step S4 comprises filling holes after the bolts are removed.

5. The tunnel foamed aluminum plate and secondary lining concrete integral casting construction method according to claim 4, wherein the foamed aluminum plate is provided with a prefabricated hole corresponding to the first through hole, and the length of the thread part on the screw does not exceed the total length of the first through hole plus the prefabricated hole.

6. The tunnel foamed aluminum plate and secondary lining concrete integral casting construction method according to any one of claims 1 to 5, wherein the connecting pieces, the screws and the bolts are all made of a fire-resistant aluminum alloy material.

7. The tunnel foamed aluminum plate and secondary lining concrete integral casting construction method according to any one of claims 1 to 5, wherein the bolts and the bolts are matched with gaskets for use.

8. The tunnel foamed aluminum plate and secondary lining concrete integral casting construction method according to any one of claims 1 to 5, wherein the foamed aluminum plate is a plane plate or a curved plate designed according to the shape of a trolley panel and the contour of a tunnel.

9. The tunnel foamed aluminum plate and secondary lining concrete block pouring construction method according to any one of claims 1 to 5, wherein the number of the first through holes is two or more, and the first through holes are uniformly or symmetrically arranged at intervals on the second member.

10. The tunnel foamed aluminum plate and secondary lining concrete block casting construction method according to any one of claims 1 to 5, wherein the foamed aluminum plate is provided with abdicating holes corresponding to the lining trolley working window.

Background

Once a fire disaster occurs in the tunnel, besides great damage to vehicles and personnel, the high temperature can also cause concrete burst and mechanical property deterioration, damage to the lining structure is generated to different degrees, and the bearing capacity and safety of the tunnel are greatly reduced. Therefore, a certain protection measure is required to keep the integrity and stability of the reinforced concrete structure in case of fire, so as to achieve the purpose of fire prevention of the tunnel structure. At present, the fireproof protection of the tunnel mainly adopts simple methods of spraying non-expansive fireproof paint on the tunnel lining, laying fireproof plates and the like, and the fireproof effect is poor.

Foamed aluminum is a novel material, and has the functions of fire prevention, heat insulation, sound absorption and noise reduction. Researches show that the closed-cell foamed aluminum has extremely low heat conductivity coefficient which is only 1/51-1/500 percent of pure aluminum, the equivalent heat conductivity coefficient of the foamed aluminum alloy with 80.2-99 percent of porosity at 25 ℃ is 3.19-1.63W/(m.K), the equivalent heat conductivity coefficient of the solid aluminum alloy at 25 ℃ is 98.4W/(m.K), and the performances of the closed-cell foamed aluminum alloy and the solid aluminum alloy on heat insulation effect are greatly different. Therefore, aluminum foam is an excellent fire-retardant material.

However, most of the current foamed aluminum materials are applied to electronic devices as electromagnetic shielding materials, or applied to road engineering as sound insulation materials, or applied to the aerospace field as heat exchange materials, and have not been applied to the field of tunnel fire protection, and therefore, further research on related construction methods is also lacking in the industry.

Disclosure of Invention

The application aims to provide a tunnel foamed aluminum plate and secondary lining concrete integral casting construction method, which gives an exact fine construction scheme while applying a foamed aluminum material to tunnel fireproof protection. The technical scheme of the application is as follows:

the utility model provides a tunnel foamed aluminum plate and two lining concrete monolithic construction methods of watering, which is characterized in that, including using purpose-made connecting piece cooperation construction, the connecting piece includes first component and second component, first component is the columnar structure, set up the screw hole and the surface sets up bellied line in the inside of first component, the second component is panel structure and is connected with the tip of first component is perpendicular, be equipped with first through-hole and the second through-hole that corresponds with the screw hole on the second component, construction methods includes following step:

step S1: one surface of the foamed aluminum plate is attached to one surface, far away from the first member, of the second member, and the foamed aluminum plate is fixedly connected with the connecting piece through the matching of the screws and the first through holes;

step S2: attaching the other surface of the foamed aluminum plate to the trolley panel, and fixedly connecting the trolley panel, the foamed aluminum plate and the connecting piece through the matching of the bolt and the threaded hole in the first member;

step S3: positioning the trolley and constructing a second lining;

step S4: and (4) removing the bolts and performing surface treatment.

In some specific embodiments, the outer surface of the first member is provided with external threads.

In some specific embodiments, between the step S2 and the step S3, a process of checking the flatness of the fit between the foamed aluminum plate and the trolley panel is further included.

In some specific embodiments, the surface treatment in step S4 includes filling the hole after the bolt is removed.

In some specific embodiments, the aluminum foam plate is provided with a preformed hole corresponding to the first through hole, and the length of the threaded portion on the screw does not exceed the total length of the first through hole plus the preformed hole.

In some specific embodiments, the connecting piece, the screw and the bolt are all made of a fire-resistant aluminum alloy material.

In some embodiments, the screw and bolt are used in conjunction with a washer.

In some embodiments, the foamed aluminum sheet is a flat sheet or a curved sheet designed according to the shape of a trolley panel and the contour of a tunnel.

In some embodiments, the number of the first through holes is two or more, and the first through holes are uniformly or symmetrically arranged on the second component at intervals.

In some specific embodiments, the foamed aluminum plate is provided with a abdicating hole corresponding to a working window of the lining trolley.

The technical scheme provided by the application has at least the following beneficial effects:

1. the foamed aluminum plate with the functions of sound absorption, noise reduction and fire resistance is applied to tunnel engineering, sound insulation and heat insulation protection of a tunnel are realized, structural change of a concrete supporting structure in the tunnel due to high temperature is avoided when a fire disaster occurs, the problems that cracking, mechanical property deterioration and the like are caused are avoided, accidents that a lining of a tunnel building drops and collapses in the fire disaster process are avoided, and the tunnel building can be continuously used after the fire disaster.

2. The concrete and feasible installation process of the foamed aluminum plate in the tunnel is provided, the construction operation is simple, the foamed aluminum plate is ensured to have enough installation strength by adopting a method of integrally pouring the foamed aluminum plate with the secondary lining concrete, the subsequent process of independently installing the foamed aluminum plate is saved, and the operation efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that other drawings may be derived from those drawings without inventive effort for a person skilled in the art.

FIG. 1 is a construction effect diagram of a tunnel foamed aluminum plate and secondary lining concrete integral casting construction method provided by an embodiment of the present application;

FIG. 2 is a schematic view of the connector of FIG. 1 disposed on an aluminum foam sheet;

FIG. 3 is a cross-sectional view of the connector of FIG. 1;

in the figure: 1 two linings, 2 foamed aluminum plate, 3 platform truck panels, 4 first components, 5 second components, 6 screw holes, 7 external screw threads, 8 first through holes, 9 second through holes, 10 hole of stepping down, 11 screws, 12 bolts.

Detailed Description

In order to facilitate understanding of the present application, the technical solutions in the present application will be described more fully and in detail with reference to the drawings and the preferred embodiments, but the scope of protection of the present application is not limited to the following specific embodiments, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

It will be understood that when an element is referred to as being "coupled" or "connected" to another element, it can be directly coupled, connected or communicated with the other element or indirectly coupled, connected or communicated with the other element via other intervening elements.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present application.

Examples

Referring to fig. 1-3, a tunnel foamed aluminum plate and secondary lining concrete integral casting construction method relates to the matching use of a special connecting piece.

The connecting piece comprises a first component 4 and a second component 5, wherein the first component 4 is a cylinder, a threaded hole 6 is formed in the first component 4, raised grains are formed in the outer surface of the first component 4, the second component 5 is of a panel structure, the first component 4 is vertically arranged on the second component 5, and a first through hole 8 and a second through hole 9 corresponding to the threaded hole 6 are formed in the second component 5.

The construction method comprises the following steps:

step S1: attaching one surface of the foamed aluminum plate 2 to one surface of the second member 4 far away from the first member 5, and realizing the fixed connection of the foamed aluminum plate 2 and the connecting piece through the matching of the screw 11 and the first through hole 8;

step S2: attaching the other surface of the foamed aluminum plate 2 to the trolley panel 3, fixedly connecting the trolley panel 3, the foamed aluminum plate 2 and the connecting piece through the matching of a bolt 12 and a threaded hole 6 in the first member 4, wherein the bolt 12 penetrates out of the trolley, sequentially passes through the trolley panel 3, the foamed aluminum plate 2 and the connecting piece and then is connected with the threaded hole 6, and the installation direction of the bolt 12 is opposite to that of the bolt 11;

step S3: inspecting the joint flatness of the foamed aluminum plate 2 and the trolley panel 3, and when the gap between the foamed aluminum plate 2 and the trolley panel 3 is not more than 1mm, determining that the foamed aluminum plate and the trolley panel are tightly jointed;

step S4: the trolley is in place, the second lining is constructed, and after the concrete is solidified, the foamed aluminum plate 2 is fixedly connected to the second lining 1 through a connecting piece;

step S5: and (3) dismantling the bolts 12, removing the trolley, and performing surface treatment, wherein the surface treatment comprises filling holes left after the bolts 5 are dismantled, so that the surface is smooth and attractive.

In this embodiment, the foamed aluminum sheet 2 is provided with preformed holes corresponding to the first through hole 8 and the second through hole 9, so as to facilitate the subsequent installation of the screw 11 and the bolt 12, wherein the length of the threaded portion on the screw 11 does not exceed the total length of the first through hole 8 plus the preformed holes.

In this embodiment, a gasket is attached to a contact portion between the screw 11 and the connecting member, and a gasket is attached to a contact portion between the bolt 12 and the carriage panel 3, so that the connection strength and the sealing property can be ensured.

In this embodiment, the foamed aluminum plate 2 is a flat plate or a curved plate designed according to the shape and size of the trolley panel 3 and the contour of the tunnel.

In this embodiment, the connecting member, the screw 11 and the bolt 12 are made of a fire-resistant aluminum alloy material, which is directly available from the market, and the specific brand and model are not limited. Meanwhile, the strength of the aluminum alloy material is required to be capable of resisting the pouring pressure during the construction of the two-lining concrete. By using the aluminum alloy material, on one hand, the related connecting structure is ensured to have enough strength, on the other hand, the fireproof performance of the connecting structure is also enhanced, and the fireproof effect is further optimized.

In the present embodiment, the thread provided on the outer surface of the first member 4 is an external thread 7, and in other specific embodiments, the thread may take other structural forms. This application is through setting up the special connecting piece of structure, and the internal thread is connected with bolt 12 on the one hand, has ensured foamed aluminum plate 2 and platform truck panel 3 and has had sufficient intensity in the concrete is poured, and can realize platform truck panel 3 and foamed aluminum plate 2 quickly separating through unscrewing bolt 12 when form removal, and on the other hand external screw thread 7 can effectively compensate that the adhesion force between foamed aluminum plate 2 and two linings 1 is not enough, further improves the installation strength.

In this embodiment, the number of the first through holes 8 is two and the first through holes 8 are symmetrically disposed on two sides of the second through hole 9, and in other specific embodiments, the number of the first through holes 8 may be more and disposed around the second through hole 9.

In this embodiment be equipped with square hole 10 of stepping down on foamed aluminum plate 2, the size and the position of the hole 10 of stepping down need not can compensate the not enough of foamed aluminum plate 2 and the laminating of platform truck panel 3 through setting up hole 10 of stepping down according to the work window design of lining cutting platform truck.

By applying the construction method, the new application of the foamed aluminum plate in the tunnel fireproof and noise reduction effects is provided, the installation efficiency of the foamed aluminum plate is further improved, and the installation quality of the foamed aluminum plate is guaranteed.

The above description is only a few examples of the present application and does not limit the scope of the claims of the present application, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present application. Any improvement or equivalent replacement directly or indirectly applicable to other related technical fields within the spirit and principle of the present application by using the contents of the specification and the drawings of the present application shall be included in the protection scope of the present application.