Inverted arch structure for tunnel waste slag backfilling

Abstract

The utility model belongs to the technical field of tunnel inverted arch backfilling, and particularly relates to an inverted arch structure for tunnel waste slag backfilling, waste slag is filled at an inverted arch of a tunnel, the waste slag is solidified into a whole through grouting, a plurality of groups of frameworks which are distributed along the trend of the tunnel at intervals are arranged in the waste slag, and a bottom plate is laid above the frameworks; the end plates are distributed at intervals in the direction of the tunnel, and the end plates and the bottom plate are connected to form a plurality of filling spaces corresponding to waste slag. The tunnel waste slag is used for inverted arch backfilling, the waste slag treatment cost and the inverted arch backfilling material cost are remarkably reduced, the outward transportation amount of the waste slag is reduced, and the influence on the environment is reduced. The inverted arch structure is supported through the framework and the supporting plate, normal construction of other working procedures is not affected while inverted arch grouting is conducted, and therefore the construction efficiency can be greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of tunnel inverted arch backfill, specifically relates to a kind of inverted arch structure of tunnel spoil backfill. BACKGROUND

[0002] In the tunnel construction process, a large amount of spoil will be generated, and the traditional spoil treatment method is mostly external transport, which not only increases the construction cost, but also may cause certain impact on the environment. At the same time, a large amount of concrete needs to be filled for the construction at the tunnel inverted arch, which is high in cost, and in the traditional construction process, the next process construction can be carried out only after the concrete at the tunnel inverted arch reaches the set strength, which cannot meet the rapid construction demand.

[0003] Therefore, it is necessary to provide an improved technical solution for the above-mentioned deficiencies of the prior art. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the deficiencies in the prior art, and provides an inverted arch structure for tunnel spoil backfill.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0006] An inverted arch structure for tunnel spoil backfill, the inverted arch of the tunnel is filled with spoil, the spoil is integrated by grouting, and a plurality of skeletons are arranged inside the spoil and spaced apart along the tunnel direction.

[0007] A plurality of end plates are spaced apart along the tunnel direction, and the end plates and the bottom plate are connected to each other to form a plurality of filling spaces corresponding to the spoil.

[0008] Preferably, the shape of the skeleton is adapted to the tunnel inverted arch, and any two adjacent skeletons are fixed by a plurality of support rods extending along the tunnel direction.

[0009] Preferably, the skeleton includes a main rod and a leg, the main rod extends horizontally along the direction perpendicular to the tunnel direction, and the end of the main rod is provided with a first arc-shaped support plate corresponding to the inverted arch.

[0010] A plurality of legs are uniformly distributed along the length direction of the main rod, and a second arc-shaped support plate corresponding to the inverted arch is arranged at the lower end of the leg.

[0011] The first arc-shaped support plate and the second arc-shaped support plate are anchored to the lining of the inverted arch by bolts.

[0012] Preferably, a plurality of grouting holes are uniformly distributed on the bottom plate, and the inner wall of the grouting hole is provided with an internal thread to connect a grouting pipe or a baffle plate through the internal thread.

[0013] Preferably, a tie bar is connected between any two adjacent legs.

[0014] Preferably, a sealing strip is arranged between any two spliced bottom plates, between the bottom plate and the tunnel inner wall, and between the bottom plate and the end plate.

[0015] Preferably, the end plate is fixed on the corresponding framework by bolts.

[0016] Beneficial effects: The tunnel spoil is used for backfilling of the inverted arch, which significantly reduces the spoil treatment cost and the inverted arch backfilling material cost, reduces the external transportation amount of the spoil, and reduces the influence on the environment. The inverted arch structure is supported by the framework and the support plate, the grouting of the inverted arch does not affect the normal construction of the remaining procedures, so that the construction efficiency can be greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, serve to explain the present application, and do not constitute any improper limitation to the present application. Among them:

[0018] Figure 1 The figure is a cross-sectional view of the inverted arch structure in the specific embodiment provided by the present application.

[0019] In the figure: 1, bottom plate; 2, main rod; 3, support rod; 4, leg; 5, spoil; 6, tie bar; 7, grouting hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0021] In the description of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application, and do not require the present application to be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present application. The terms "connected", "connected" used in the present application should be understood broadly, for example, it can be fixed connection, or detachable connection; it can be directly connected, or indirectly connected through an intermediate part. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] The utility model will be explained in detail below with reference to the drawings and in combination with the embodiments. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0023] As Figure 1 shown, a kind of tunnel discarded backfilling inverted arch structure, in the process of tunnel construction, the discarded 5 generated is collected and preliminarily handled, according to design requirement, the discarded 5 of tunnel is filled to inverted arch, in filling process, according to preset position installation framework, support is formed by installation framework, the inside of discarded 5 is equipped with multiple groups of framework spaced apart along the direction of tunnel, bottom plate 1 is laid above framework, so that other process construction of tunnel can be carried out above bottom plate 1, so that the inverted arch construction of tunnel and other secondary lining do not influence each other, and then multiple process construction is carried out simultaneously, improve construction efficiency.

[0024] Discarded 5 is integrated by grouting, to ensure the grouting effect of slurry, multiple end plates are spaced apart along the direction of tunnel, end plate and bottom plate 1 are connected to form multiple filling spaces corresponding to discarded 5, the length of each filling space is set according to actual demand, which can meet the requirement of multiple process synchronous construction, and excessive requirement is not made here.

[0025] In an alternative embodiment, the shape of the framework is adapted to the tunnel inverted arch, and the framework is made of I-beam or square steel, which can provide sufficient support capacity for the bottom plate 1. The framework and the tunnel discarded 5 are integrated by using slurry, which improves the stability of the inverted arch. Any two adjacent frameworks are fixed by a plurality of support rods 3 extending along the direction of the tunnel. The support rods 3 are uniformly distributed in the transverse direction of the tunnel. The support rods 3 can be square steel, which are connected to the framework by bolts or welded to be fixed. Thus, the framework can be assembled and installed according to the construction progress. After the framework is installed, the discarded 5 is filled. After the discarded 5 is filled, the bottom plate 1 is installed as a channel for transporting the discarded 5. The framework includes a main rod 2 and a leg 4. The length of the main rod 2 is adapted to the width of the upper edge of the tunnel inverted arch. The main rod 2 extends horizontally along the direction perpendicular to the direction of the tunnel. The end of the main rod 2 is provided with a first arc-shaped support plate corresponding to the inverted arch. The first arc-shaped support plate is stably supported on both sides of the inverted arch, thereby ensuring the stability of the support. Further, a plurality of legs 4 are uniformly distributed along the length direction of the main rod 2. The length of the leg 4 is adjusted according to the change of the arc of the inverted arch, thereby forming a stable support. A second arc-shaped support plate corresponding to the inverted arch is provided at the lower end of the leg 4. The first arc-shaped support plate and the second arc-shaped support plate are anchored to the primary lining of the inverted arch by bolts, so that the framework is stably supported at the inverted arch. Thus, the requirement of supporting other construction equipment can be met before the discarded 5 is grouted and solidified.

[0026] A plurality of grouting holes 7 are evenly distributed on the bottom plate 1, the grouting holes 7 are distributed in a quincunx shape, the inner wall of the grouting hole 7 is provided with an internal thread, so as to connect the grouting pipe or the blocking plate through the internal thread. After the grouting is completed, the blocking plate is used for blocking, the end plate is a steel formwork, which can be fixed on the corresponding framework through bolts, the bottom plate 1 can be a concrete prefabricated plate or a steel plate, the framework and the end plate are installed first, and the waste slag 5 is backfilled after the installation of the framework and the end plate is completed, and the laying is carried out along with the filling of the waste slag 5. In order to ensure that the pull bars 6 are connected between any two adjacent legs 4, so as to connect a plurality of frameworks into one, and form a steel framework corresponding to the inverted arch filling part.

[0027] In an optional embodiment, a sealing strip is arranged between any two spliced bottom plates 1, between the bottom plate 1 and the inner wall of the tunnel, and between the bottom plate 1 and the end plate, so as to ensure the sealing of the filling space to a certain extent, and avoid the leakage of the slurry. In actual construction, the strength requirement of the filling layer of the tunnel secondary lining inverted arch part is not high, so a too high pressure is not required in the process of grouting, and only the filling of the waste slag 5 without blank can be met.

[0028] Further, a flange corresponding to the grouting hole 7 is arranged on the upper part of the grouting pipe, the flange is matched with the grouting hole 7, and an external thread corresponding to the grouting hole 7 is arranged, a conical bottom is arranged at the bottom of the grouting pipe, so as to facilitate the insertion of the grouting pipe into the waste slag 5, and a grouting outlet is arranged below the flange of the grouting pipe, so as to realize rapid grouting.

[0029] Further, a part of the grouting holes 7 are connected with the grouting pump, and the remaining grouting holes 7 can be inserted with the vibration rod, so as to ensure the grouting effect.

[0030] In an optional embodiment, the tunnel waste slag 5 is crushed, so that the particle size of the tunnel waste slag 5 is not greater than 10 cm, and is preferably 3-5 cm, so as to ensure the compactness of the filled waste slag 5.

[0031] In addition, a plurality of insertion nails are arranged on the lower surface of the bottom plate 1, the insertion nails are inserted into the waste slag 5, so as to ensure the relative stability of the bottom plate 1 and the waste slag 5 after solidification.

[0032] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application is within the protection scope of the pending claims of the present application.

Claims

1. An inverted arch structure for tunnel spoil backfilling, characterized in that, The tunnel's invert is filled with waste material, which is then solidified into a single unit through grouting. Inside the waste material, multiple sets of skeletons are spaced apart along the tunnel's direction, and a base plate is laid on top of the skeletons. Multiple end plates are spaced apart along the tunnel direction, and the end plates are connected to the bottom plate to form multiple corresponding waste filling spaces.

2. The invert arch structure for tunnel spoil backfilling according to claim 1, characterized in that, The shape of the skeleton is adapted to the tunnel invert arch, and any two adjacent skeletons are fixed together by a plurality of support rods extending along the tunnel direction.

3. The invert arch structure for tunnel spoil backfilling according to claim 2, characterized in that, The frame includes a main rod and supporting legs. The main rod extends horizontally along the direction perpendicular to the tunnel, and the end of the main rod is provided with a first arc-shaped support plate corresponding to the inverted arch. The multiple outriggers are evenly distributed along the length of the main rod, and a second arc-shaped support plate corresponding to the inverted arch is provided at the lower end of the outriggers; Both the first arc-shaped support plate and the second arc-shaped support plate are anchored to the lining of the invert arch by bolts.

4. The invert arch structure for tunnel spoil backfilling according to claim 1, characterized in that, The base plate has a plurality of grouting holes evenly distributed thereon, and the inner wall of the grouting holes is provided with internal threads so as to connect grouting pipes or plugs through the internal threads.

5. The invert arch structure for tunnel spoil backfilling according to claim 3, characterized in that, A brace connects any two adjacent legs.

6. The invert arch structure for tunnel spoil backfilling according to claim 1, characterized in that, Sealing strips are provided between any two bottom plates that are spliced ​​together, between the bottom plate and the tunnel wall, and between the bottom plate and the end plate.

7. The invert arch structure for tunnel spoil backfilling according to claim 1, characterized in that, The end plate is fixed to the corresponding frame with bolts.

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