CN219218944U - Soft foundation reinforcing structure for open cut tunnel - Google Patents

Abstract

The utility model belongs to the technical field of tunnel soft foundation treatment, and discloses a soft foundation reinforcing structure for an open cut tunnel, which comprises a tunnel body, wherein a first reinforcing skirt edge and a second reinforcing skirt edge are symmetrically arranged on two sides of the inside of the tunnel body, reinforcing strips are equidistantly arranged at the bottom of the inside of the tunnel body, biting blocks are integrally formed at two ends of each reinforcing strip, and biting grooves matched with the biting blocks are formed on one side, opposite to the first reinforcing skirt edge and the second reinforcing skirt edge, of each reinforcing strip; the bottom reinforcement is arranged on the reinforcement drawing strip in a penetrating manner, the reinforcement skirt edge and the reinforcement drawing strip are arranged in the open cut tunnel, so that the bearing capacity of a foundation can be effectively improved, the stability of a structure is improved, further powerful guarantee is provided for the opening operation of a highway tunnel, in addition, the biting blocks are embedded in the biting grooves of the reinforcement skirt edge through the arrangement of the biting blocks and the biting grooves, the overall stability of the reinforcement skirt edge and the reinforcement drawing strip can be improved, and displacement is not easy to occur.

Description

Soft foundation reinforcing structure for open cut tunnel

Technical Field

The utility model belongs to the technical field of tunnel soft foundation treatment, and particularly relates to a soft foundation reinforcing structure for an open cut tunnel.

Background

Along with the acceleration of modern construction process, the construction scale is increasingly enlarged, the difficulty is continuously increased, higher requirements are put on open cut highway tunnel foundations, and natural foundations which cannot meet the requirements of buildings on the foundations are often called soft foundations or poor foundations, wherein the soft foundations are foundations formed by silt, mucky soil, partial filled soil, mixed filled soil and other high-compressibility soil layers.

The silt powdery clay is disclosed in the construction of the deep foundation pit of the open cut highway tunnel, is normally consolidated, has the characteristics of high compressibility, high water content, high sensitivity, easy thixotropic property, low strength, low bearing capacity of a substrate and great influence on the stability of a main structure, and is required to be reinforced in order to enable a soft foundation to meet the building requirement, so the soft foundation reinforcing structure for the open cut highway tunnel is provided.

Disclosure of Invention

The utility model aims to provide a soft foundation reinforcing structure for an open-cut tunnel, which aims to solve the problems that the soft foundation substrate in the construction of the deep foundation pit of the open-cut tunnel provided by the background art has low bearing capacity, has great influence on the stability of a main structure and cannot meet the building requirement.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a be used for open cut tunnel soft foundation reinforced structure, includes the tunnel body, the inside bilateral symmetry of tunnel body is equipped with first reinforcement shirt rim and second reinforcement shirt rim, the inside bottom equidistance of tunnel body is installed and is consolidated the strip, consolidate the both ends of strip and all integrated into one piece have the piece that stings, first reinforcement shirt rim and second consolidate opposite one side of shirt rim all offer with stings the piece looks adaptation stings the groove;

the reinforcing drawing strip is provided with a bottom reinforcement in a penetrating way.

Preferably, the bottom reinforcement is a pile insert vertically penetrating through the reinforcing strip, and inverted teeth are fixed at the bottom end of the outer wall of the pile insert.

Preferably, the bottom end of the pile is integrally formed with a tip.

Preferably, the reinforcing strips are internally provided with stiffeners.

Preferably, the reinforcement comprises a first reinforcement rib and a second reinforcement rib, the first reinforcement rib and the second reinforcement rib are vertically arranged, and the adjacent first reinforcement rib and the adjacent second reinforcement rib are bound through steel wires.

Preferably, the side of the first reinforcing skirt edge and the side of the second reinforcing skirt edge, which are away from the reinforcing drawing bar, are both fixed with steel plates.

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

(1) According to the utility model, the reinforcement skirt edge and the reinforcement drawing strip are arranged in the open cut tunnel, so that the bearing capacity of the foundation can be effectively improved, the stability of a structure is improved, further, powerful guarantee is provided for the opening operation of the highway tunnel, in addition, the biting block and the biting groove are arranged, so that the biting block is embedded in the biting groove of the reinforcement skirt edge, the overall stability of the reinforcement skirt edge and the reinforcement drawing strip can be increased, and the displacement is not easy to occur.

(2) According to the utility model, the inserted pile and the inverted tooth are additionally arranged, so that the inserted pile can be inserted into the soil layer below the reinforced drawing bar when the reinforced drawing bar is used, the difficulty in pulling out the inserted pile can be increased by utilizing the inverted tooth, the stability of the poured reinforced drawing bar is further increased, and in addition, the integrally formed tip end part is convenient for the inserted pile to be inserted into the soil layer downwards, so that the reinforced drawing bar is labor-saving.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a pile according to the present utility model;

fig. 3 is an enlarged view of a portion a in fig. 1;

in the figure: 1. a tunnel body; 2. a first reinforcing skirt; 3. a second reinforcing skirt; 4. inserting piles; 5. reinforcing the drawing strip; 6. a first reinforcing rib; 7. a second reinforcing rib; 8. biting blocks; 9. a tip portion; 10. chamfering; 11. a biting groove; 12. and (3) a steel plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 and 3, the present utility model provides the following technical solutions: a soft foundation reinforcement structure for an open cut tunnel, comprising:

the tunnel body 1, the inside bilateral symmetry of the tunnel body 1 is equipped with first reinforcement shirt rim 2 and second reinforcement shirt rim 3, the inside bottom equidistance of the tunnel body 1 is installed and is consolidated the strip 5, consolidates the both ends homogeneous body shaping of strip 5 and has stings piece 8, first reinforcement shirt rim 2 and second reinforcement shirt rim 3 opposite one side all offered with stings piece 8 looks adaptation stings groove 11;

through the technical scheme:

the first reinforcement skirt edge 2, the second reinforcement skirt edge 3 and the reinforcement drawing strip 5 can effectively improve the bearing capacity of the foundation, improve the stability of the structure, further provide powerful guarantee for the opening operation of the highway tunnel, and in addition, when in construction, the biting block 8 can be embedded in the biting groove 11 of the reinforcement skirt edge, so that the overall stability of the reinforcement skirt edge and the reinforcement drawing strip 5 can be improved, and the displacement is not easy to occur.

Further, a reinforcing piece is arranged in the reinforcing drawing bar 5, the reinforcing piece comprises a first reinforcing rib 6 and a second reinforcing rib 7, the first reinforcing rib 6 and the second reinforcing rib 7 are vertically arranged, and the adjacent first reinforcing rib 6 and second reinforcing rib 7 are bound through steel wires;

specifically, the arrangement of the first reinforcing ribs 6 and the second reinforcing ribs 7 can increase the strength of the reinforcing drawing bars 5 formed by the high-pressure jet grouting piles, and increase the stability of reinforcement.

Further, a steel plate 12 is fixed on one side of the first reinforcing skirt 2 and one side of the second reinforcing skirt 3, which are away from the reinforcing drawing bars 5;

specifically, the added steel plates 12 can block the soil layer of the tunnel, and reduce the occurrence of collapse of the soil layer at the side edges.

In addition, the first reinforcing skirt edge 2, the second reinforcing skirt edge 3 and the reinforcing drawing bars 5 are formed in a structural foundation range by adopting a triple pipe high-pressure jet grouting pile treatment mode, wherein the concrete implementation flow of the reinforcing structure in the tunnel is as follows:

(1) And (3) leveling the field, and measuring and releasing a construction axis according to a designed construction drawing.

(2) Constructing a pollution discharge and mortar mixing system, generating 10-20% of slurry returning amount in the construction process of the jet grouting pile, introducing waste slurry into a sedimentation tank, and timely clearing and transporting settled soil after the sedimentation.

(3) And (3) arranging the rotary jet drilling machine on the designed pile position, and enabling the axis of the drill rod to be vertically aligned with the center of the pile position.

(4) And (5) testing piles before construction, and determining setting parameters of the high-pressure jet grouting piles.

(5) The pile forming sequence is constructed in a hole separating and sequencing mode, and the construction interval time is too long after the cement soil of the adjacent pile bodies is finally solidified, so that cold joints are easily generated at the pile body lap joint positions.

(6) And after the grouting pile forming is finished, the high-pressure injection drill rod is pulled out, and the next pile is constructed by shifting.

Referring to fig. 1-2, a bottom reinforcement is arranged on the reinforcing strip 5 in a penetrating manner, the bottom reinforcement is a pile insert 4 vertically penetrating through the reinforcing strip 5, and inverted teeth 10 are fixed at the bottom end of the outer wall of the pile insert 4.

Through the technical scheme:

when the pile inserting device is used, the pile inserting device 4 can be inserted into the soil layer below the reinforced strip 5, the difficulty in pulling out the pile inserting device 4 can be increased by the aid of the inverted tooth 10, and then the stability of the poured reinforced strip 5 is improved.

Further, the bottom end of the pile 4 is integrally formed with a tip 9;

in particular, the integrally formed tip portion 9 facilitates insertion of the stake 4 downwardly into the earth.

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

Claims (6)

1. A soft foundation reinforcement structure for an open cut tunnel, comprising:

the tunnel body (1), the inside bilateral symmetry of tunnel body (1) is equipped with first reinforcement shirt rim (2) and second reinforcement shirt rim (3), consolidate and take out strip (5) are installed to the inside bottom equidistance of tunnel body (1), consolidate both ends of taking out strip (5) and all integrated into one piece have stings piece (8), first reinforcement shirt rim (2) and second reinforcement shirt rim (3) opposite one side all offer with stings piece (8) looks adaptation stings groove (11);

the reinforcing drawing strip (5) is provided with a bottom reinforcement in a penetrating way.

2. A soft foundation reinforcement structure for an open cut tunnel according to claim 1, wherein: the bottom reinforcement is a pile inserting (4) vertically penetrating through the reinforcement drawing strip (5), and inverted teeth (10) are fixed at the bottom end of the outer wall of the pile inserting (4).

3. A soft foundation reinforcement structure for an open cut tunnel according to claim 2, wherein: the bottom end of the pile (4) is integrally formed with a tip end part (9).

4. A soft foundation reinforcement structure for an open cut tunnel according to claim 3, wherein: the reinforcing drawing strip (5) is internally provided with a reinforcing piece.

5. The soft foundation reinforcement structure for an open cut tunnel according to claim 4, wherein: the reinforcement comprises a first reinforcement rib (6) and a second reinforcement rib (7), wherein the first reinforcement rib (6) and the second reinforcement rib (7) are vertically arranged, and the adjacent first reinforcement rib (6) and the adjacent second reinforcement rib (7) are bound by steel wires.

6. The soft foundation reinforcement structure for an open cut tunnel according to claim 5, wherein: and steel plates (12) are fixed on one sides of the first reinforcing skirt edge (2) and the second reinforcing skirt edge (3) which deviate from the reinforcing drawing strip (5).

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