CN108266206A - A kind of bored tunnel corrugated steel-mixed mud composite lining structure - Google Patents

Abstract

The present invention discloses a kind of bored tunnel corrugated steel mixed mud composite lining structure, including properties of arched corrugated steel harden structure and arch bar construction；The arch bar construction includes the more longitudinal reinforcements, more transverse steels and the Duo Gen single hoop muscle that are equally spaced, longitudinal reinforcement is fixedly connected with the lap-joint of transverse steel, and the lap-joint of longitudinal reinforcement and transverse steel is connect with the outside of the properties of arched corrugated steel harden structure by single hoop muscle；The outside of the properties of arched corrugated steel harden structure and arch bar construction have poured mixed mud.The present invention improves the reliability of tunnel comprehensive performance, improves operating efficiency, construction is flexible, saves manpower and materials.

Description

A corrugated steel plate-concrete composite lining structure for underground excavation tunnels

technical field

The invention relates to the technical field of needle roller assembly, in particular to a corrugated steel plate-concrete composite lining structure for an underground excavation tunnel.

Background technique

With the deepening of infrastructure construction and the development of transportation technology, the mileage of tunnels in my country has increased rapidly. Among these new tunnels, there are many extra-long tunnels and long tunnels. These tunnels often need to be equipped with widened bands. The proportion of upper and higher broadband in road tunnels is about 3%. Due to the difference between the section form of the widened tunnel and the non-widened section, the applicability of the formwork trolley is insufficient. In order to facilitate the operation and management of long tunnels, a certain length of space between the left and right tunnels is used to design cross-holes for people (vehicles). Due to the short distance between the tunnels for people (vehicles) and the special section, the applicability of formwork trolleys is insufficient.

In municipal tunnels, the section changes greatly, the turning radius is small, and it is often accompanied by the intersection and bifurcation of the tunnel. The size of the section at the tunnel fork and other sections will also vary greatly, so it is not suitable to use formwork trolleys. In the above tunnel construction, due to the limitation of construction technology, complex construction methods are often used, resulting in uneconomical and inconvenient.

At present, for the tunnel composite lining structure, at the stage when formwork trolleys cannot be used, most of the support is erected, and the formwork is made and then grouted. It is time-consuming and labor-intensive to set up the brackets of the whole hall, and the extensive use of wooden formwork is not conducive to environmental protection. At the same time, the overall formwork is poor, and it is easy to form runaway formwork, so it is difficult to guarantee the quality of the concrete structure. After the concrete pouring is completed, the formwork needs to be removed, resulting in a secondary input of manpower and material resources, and the residual steel bars are welded. Residual steel nails are likely to remain on the lining surface, which will leave hidden dangers in subsequent operations.

Contents of the invention

Aiming at the deficiencies in the existing technology, the technical problem to be solved by the present invention is to provide a corrugated steel plate-concrete composite lining structure for underground excavation tunnels, which improves the reliability of the comprehensive performance of the tunnel, improves the operating efficiency, allows flexible construction, and saves Human and material resources.

The invention provides a corrugated steel plate-concrete composite lining structure for an underground excavation tunnel, which includes an arched corrugated steel plate structure and an arched steel bar structure; the arched steel bar structure includes multiple longitudinal steel bars and multiple transverse steel bars arranged at equal intervals It is fixedly connected with a plurality of single-leg stirrups, and the lap joints of longitudinal steel bars and transverse steel bars, and the lap joints of longitudinal steel bars and transverse steel bars are connected with the outer side of the arched corrugated steel plate structure through single-leg stirrups; the arched The outer side of the corrugated steel structure and the arched steel structure are poured with concrete.

Preferably, a plurality of steel bar hooks arranged in a matrix are installed on the outer side of the arched corrugated steel plate structure, one end of the single-leg stirrup is hooked to the steel bar hook, and the other end of the single-leg stirrup is overlapped with the longitudinal steel bar and the transverse steel bar connection.

Preferably, the arched corrugated steel plate structure includes a plurality of arched corrugated steel plates, and the edges of the length direction of two adjacent arched corrugated steel plates are overlapped and fixedly connected; the arched corrugated steel plate includes a plurality of connected corrugated steel plates, The ends of two connected corrugated steel plates are overlapped and fixedly connected; and the fixed joints of the connected corrugated steel plates of two adjacent arched corrugated steel plates are arranged in a staggered manner.

Preferably, the corrugated steel plate-concrete composite lining structure of the underground excavation tunnel also includes a bottom reinforcement structure, the bottom reinforcement structure includes an upper reinforcement mesh and a lower reinforcement mesh, and the reinforcement overlap of the upper reinforcement mesh and the corresponding reinforcement overlap of the lower reinforcement mesh The two ends of the upper reinforcement mesh and the lower reinforcement mesh are respectively connected with the two ends of the arched reinforcement structure.

Preferably, the bottom reinforcement structure is poured with concrete.

Preferably, the corrugated steel plate-concrete composite lining structure of the excavated tunnel also includes a lower reinforcement mesh and a bottom corrugated steel plate structure, and the overlapping part of the lower reinforcement mesh and the corresponding lower end surface of the bottom corrugated steel plate structure are connected by single-leg stirrups.

Beneficial effects of the present invention:

In the present invention, concrete is poured on the outer side of the arched corrugated steel plate structure and the arched steel bar structure. The arched corrugated steel plate structure is not only the load-bearing structure after the tunnel is completed, but also the formwork for the lining structure poured during the tunnel construction process. The composite lining structure It is an optimization and improvement of the traditional method, which can be used in short tunnels and long-span bifurcation sections of medium and long tunnels, emergency parking sections, communication passages, special cross-section sections and other sections where the applicability of the overall formwork trolley is insufficient, improving the reliability of the comprehensive performance of the tunnel It improves the working efficiency, the construction is flexible, saves manpower and material resources, saves the cost, and is convenient for construction.

Description of drawings

Fig. 1 is the structural representation of present embodiment;

Fig. 2 is the structural representation that the present embodiment contains the bottom reinforcing bar structure;

Fig. 3 is the structural representation of the present embodiment containing the corrugated steel plate structure at the bottom;

Fig. 4 is the partial enlarged view of the arched steel bar structure of the present embodiment;

Fig. 5 is a structural schematic diagram of the arched corrugated steel plate structure of this embodiment.

Reference signs: 1-arched corrugated steel structure, 11-steel bar hook, 12-arched corrugated steel plate, 13-connecting corrugated steel plate, 2-arched steel bar structure, 21-longitudinal steel bar, 22-transverse steel bar, 23-single Leg stirrups, 3-bottom reinforcement structure, 31-upper reinforcement mesh, 32-lower reinforcement mesh, 4-bottom corrugated steel plate

Detailed ways

Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and therefore are only examples, rather than limiting the protection scope of the present invention.

As shown in Figures 1 to 5, the present invention discloses a corrugated steel plate-concrete composite lining structure for underground excavation tunnels, including an arched corrugated steel plate structure 1 and an arched steel bar structure 2; the arched steel bar structure 2 includes equidistant arrangement A plurality of longitudinal reinforcement bars 21, a plurality of transverse reinforcement bars 22, and a plurality of single-leg stirrup bars 23, the laps of the longitudinal reinforcement bars 21 and the transverse reinforcement bars 22 are fixedly connected, and the lap joints of the longitudinal reinforcement bars 21 and the transverse reinforcement bars 22 are connected with the arch corrugated The outer side of the steel plate structure 1 is connected by a single leg stirrup 23; the outer side of the arched corrugated steel plate structure 1 and the arched steel bar structure 2 are poured with concrete. The structure is an arch-wall composite lining structure. By pouring concrete on the outer side of the arched corrugated steel plate structure 1 and the arched steel bar structure 2, the arched corrugated steel plate structure 1 is not only the load-bearing structure of the tunnel after it The formwork poured in the middle lining structure. The composite lining structure is an optimization and improvement of the traditional method. It can be used for short tunnels and medium and long tunnels with long-span bifurcation sections, emergency parking sections, communication passages, and special section sections. The applicability of the overall formwork trolley is insufficient. section, which improves the reliability of the comprehensive performance of the tunnel, improves the operating efficiency, allows flexible construction, saves manpower and material resources, saves costs, and is convenient for construction; The steel mesh is formed by connection, and the steel mesh is combined with single-leg stirrups and arched corrugated steel plate structure 1 to make the entire composite lining structure stronger and improve the load-bearing strength of the tunnel.

Specifically, a plurality of steel bar hooks 11 arranged in a matrix are installed on the outside of the arched corrugated steel plate structure 1, one end of the single-leg stirrup 23 is hooked to the steel bar hook 11, and the other end of the single-leg stirrup 23 is connected to the longitudinal steel bar 21 and the horizontal The overlapping joints of steel bars 22 are connected. By setting the steel bar hook 11 on the periphery of the arched corrugated steel plate structure 1, it is convenient for the overlap of the longitudinal steel bar 21 and the transverse steel bar 22 to pass through the single leg stirrup 23 and the arched corrugated steel plate structure 1, thereby improving the work efficiency. In addition, the arched corrugated steel plate structure 1 includes a plurality of arched corrugated steel plates 12, and the edges of two adjacent arched corrugated steel plates 12 in the length direction are overlapped and fixedly connected; the arched corrugated steel plate 12 includes a plurality of connected corrugated steel plates 13, The ends of two adjacent corrugated steel plates 13 are overlapped and fixedly connected; and the fixed joints of the two adjacent arched corrugated steel plates 12 are arranged in a staggered manner. The fixed joints of the corrugated steel plates 13 between two adjacent arched corrugated steel plates 12 are staggered to avoid stress concentration at the joints of the corrugated steel plates 13, thereby improving the bearing strength of the arched corrugated steel plate structure 1 .

The present invention utilizes connecting corrugated steel plates 13 to form an arched corrugated steel plate 12, and then the arched corrugated steel plates 12 are connected to each other to form a certain rigidity and strength. At the same time, it is used as a lining structure and a pouring formwork for concrete, avoiding the slow progress and poor quality of the full support. , high cost and other disadvantages; at the same time, it can be flexibly arranged according to environmental adjustment and section requirements, adapting to any section structure, avoiding the modification of formwork trolleys, saving manpower and material resources, and greatly improving the construction progress of special section lining structures; in addition, the lining surface is corrugated Steel plates, instead of ordinary concrete, will not cause conventional concrete defects such as structural cracking and block loss in the later stage, which is conducive to operational safety.

In this embodiment, as shown in Figure 2, the corrugated steel plate-concrete composite lining structure of the underground excavation tunnel also includes a bottom reinforcement structure 3, and the bottom reinforcement structure 3 includes an upper reinforcement mesh 31 and a lower reinforcement mesh 32, and the reinforcement of the upper reinforcement mesh 31 The overlapped joints and the corresponding lower reinforced mesh 32 are connected by single-leg stirrups; the two ends of the upper reinforced mesh 31 and the lower reinforced mesh 32 are respectively connected with the two ends of the arched reinforced structure 1 . The bottom reinforcement structure 3 is poured with concrete. The structure is a composite lining structure of corrugated steel plate arch wall arrangement, surrounded by the connection of the bottom steel structure 3 and the arched steel structure 1, making the whole structure more firm.

In this embodiment, as shown in FIG. 3 , the corrugated steel plate-concrete composite lining structure of the underground excavation tunnel also includes a lower steel mesh 32 and a bottom corrugated steel plate structure 4, and the steel bar overlap of the lower steel mesh 32 and the bottom corrugated steel plate structure 4 The corresponding part of the lower end surface is connected by a single-leg stirrup. Concrete is poured between the lower part of the bottom corrugated steel plate structure 4 and the lower steel mesh 32, and the whole structure is a composite lining structure with corrugated steel plates all around, which further improves the bearing strength of the entire tunnel after it is completed.

Finally, it should be noted that: the above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from The present invention can be realized in other specific forms without compromising the spirit or essential characteristics of the present invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. A corrugated steel plate-concrete composite lining structure for underground excavation tunnels, characterized in that: it includes an arched corrugated steel plate structure and an arched steel bar structure; The arched reinforcement structure includes a plurality of longitudinal reinforcements, a plurality of transverse reinforcements and a plurality of single-leg stirrups arranged at equal intervals. The outer side of the arched corrugated steel plate structure is connected by single-leg stirrups; The outer side of the arched corrugated steel plate structure and the arched reinforcement structure are poured with concrete. 2. The corrugated steel plate-concrete composite lining structure for underground excavation tunnels according to claim 1, characterized in that: the outer side of the arched corrugated steel plate structure is equipped with a plurality of steel bar hooks arranged in a matrix, and one end of the single-leg stirrup It is hooked with the steel bar hook, and the other end of the single-leg stirrup is connected with the overlapping joint of the longitudinal steel bar and the transverse steel bar. 3. The corrugated steel plate-concrete composite lining structure for underground excavation tunnel according to claim 1, characterized in that: the arched corrugated steel plate structure comprises a plurality of arched corrugated steel plates, the length of two adjacent arched corrugated steel plates The edges of the direction are overlapped and fixedly connected; the arched corrugated steel plate includes multiple connected corrugated steel plates, and the ends of two adjacent corrugated steel plates are overlapped and fixedly connected; and the connected corrugated steel plates of the adjacent two arched corrugated steel plates are fixedly connected The layout is staggered. 4. The corrugated steel plate-concrete composite lining structure for underground excavation tunnel according to any one of claims 1 to 3, characterized in that: it also includes a bottom reinforcement structure, the bottom reinforcement structure includes an upper reinforcement mesh and a lower reinforcement mesh, and the upper reinforcement The steel bar overlap of the mesh and the corresponding lower steel mesh are connected by single-leg stirrups; the two ends of the upper steel mesh and the lower steel mesh are respectively connected with the two ends of the arched steel structure. 5. The corrugated steel plate-concrete composite lining structure for underground excavation tunnel according to claim 4, characterized in that: said bottom reinforcement structure is poured with concrete. 6. The corrugated steel plate-concrete composite lining structure for underground excavation tunnels according to any one of claims 1 to 3, characterized in that: it also includes a lower reinforcement mesh and a bottom corrugated steel plate structure, and the overlapping parts of the lower reinforcement mesh and the The corresponding part of the lower end surface of the bottom corrugated steel plate structure is connected by single-leg stirrups.