Anti-collapse karst foundation structure

Abstract

The utility model discloses an anti-collapse karst foundation structure, which belongs to the technical field of road construction and comprises a soil base layer, a foundation pit is arranged at the top of the soil base layer, a gravel filling layer is arranged at the bottom in the foundation pit, an anti-collapse layer is arranged at the top of the gravel filling layer, a backfill layer is arranged at the top of the anti-collapse layer, and a reinforcing net is arranged in the anti-collapse layer. The two sides of the reinforcing nets are located outside the two sides of the anti-collapse layer, mounting grooves are formed in the two sides of the foundation pit, and the reinforcing nets located on the two sides of the anti-collapse layer are clamped into the mounting grooves. The two sides of the reinforcing net are clamped into the mounting grooves through the reinforcing net arranged in the anti-collapse layer, and when the land base layer collapses in a small range, the reinforcing net can lift up the anti-collapse layer and slow down the collapse speed of the anti-collapse layer, so that the stability of the foundation structure is improved, and the practicability of the foundation structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of road construction, in particular to an anti-collapse karst foundation structure. Background Art

[0002] Karst landform is a geological phenomenon formed by the long-term impact and erosion of groundwater and surface water on soluble rocks. The erosion of the rocks causes the bottom of the foundation to become hollow, and eventually it cannot support the weight of the foundation and collapses.

[0003] Since karst landforms are widely distributed in my country, the construction of many roads cannot completely avoid karst landforms. The construction of traditional road foundation structures in karst landform areas will increase the speed of collapse, and it is very dangerous for vehicles to drive on such roads. Therefore, a karst foundation structure with anti-collapse is proposed. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a collapse-resistant karst foundation structure. The foundation structure has strong integrity and is interconnected with the land base, which can better cope with small-scale collapse and is conducive to improving the practicability of the foundation structure.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a collapse-proof karst foundation structure, including a land base, a foundation pit is opened on the top of the land base, a sand and gravel filling layer is arranged at the bottom of the foundation pit, an anti-collapse layer is arranged on the top of the sand and gravel filling layer, a backfill layer is arranged on the top of the anti-collapse layer, a reinforcing net is arranged in the anti-collapse layer, both sides of the reinforcing net are located outside the anti-collapse layer, an installation groove is opened in the middle of both sides of the foundation pit, and the reinforcing nets located outside the anti-collapse layer are clamped and fixed in the installation groove.

[0006] Preferably, a supporting plate is fixedly installed in the installation groove, the supporting plate abuts against the bottom of the external reinforcing net on both sides of the anti-collapse layer, and the external reinforcing net on both sides of the anti-collapse layer and the supporting plate are perpendicular to each other.

[0007] Preferably, the reinforcing net comprises a support rod and a connector, and the support rod is snap-connected in the connector.

[0008] Preferably, the anti-collapse layer is a concrete casting layer.

[0009] Preferably, the support rod is threaded steel.

[0010] Preferably, the connector is a cross-shaped connector, a plurality of integrally formed anti-sliding blocks are provided in the connector connection port, an integrally formed reinforcing plate is provided on the outer side of the connector, and the threaded groove on the support rod is engaged with the anti-sliding blocks.

[0011] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0012] 1. By setting the reinforcing net in the anti-collapse layer and setting it in the installation groove of the foundation pit, the foundation structure and the land base form a whole. When a small-scale collapse occurs, the reinforcing net can lift the anti-collapse layer, thereby slowing down the overall collapse speed of the foundation structure, which is beneficial to improving the practicality of the foundation structure.

[0013] 2. The supporting plate is arranged so as to abut against and be perpendicular to the reinforcing net and cooperate with the reinforcing net to raise the anti-collapse layer in both horizontal and vertical directions, thereby achieving better effect in coping with collapse and further improving the practicality of the foundation structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the overall structure of a karst foundation structure for preventing collapse in the embodiment;

[0015] Figure 2 A schematic diagram of a reinforcement net structure for a karst foundation structure that prevents collapse in an embodiment;

[0016] Figure 3 A cross-sectional view of a connector structure of a karst foundation structure for preventing collapse in an embodiment;

[0017] Among them: 1. Land base; 2. Foundation pit; 3. Sand and gravel filling layer; 4. Anti-collapse layer; 5. Backfill layer; 6. Reinforcement net; 61. Support rod; 62. Connector; 621. Anti-sliding block; 622. Reinforcement plate; 7. Support plate; 8. Installation groove. DETAILED DESCRIPTION

[0018] The following is attached to the instruction manual Figure 1-3 , the technical solution of the utility model is explained through specific embodiments.

[0019] Embodiment:

[0020] like Figure 1 As shown, the utility model provides an anti-collapse karst foundation structure, including a land base 1, a foundation pit 2 is opened on the top of the land base 1, a sand and gravel filling layer 3 is arranged at the bottom of the foundation pit 2, an anti-collapse layer 4 is arranged on the top of the sand and gravel filling layer 3, a backfill layer 5 is arranged on the top of the anti-collapse layer 4, a reinforcing net 6 is arranged in the anti-collapse layer 4, both sides of the reinforcing net 6 are located outside the anti-collapse layer 4, mounting grooves 8 are opened in the middle of both sides of the foundation pit 2, the reinforcing net 6 located outside the anti-collapse layer 4 is clamped and fixed in the mounting grooves 8, a supporting plate 7 is fixedly installed in the mounting grooves 8, the supporting plate 7 is abutted against the bottom of the reinforcing net 6 on the outside of the anti-collapse layer 4, and the reinforcing net 6 on the outside of the anti-collapse layer 4 on both sides and the supporting plate 7 are perpendicular to each other.

[0021] like Figure 2 As shown, the reinforcing net 6 includes a support rod 61 and a connector 62 , and the support rod 61 is snap-connected in the connector 62 .

[0022] It should be noted that, in this embodiment, the support rod 61 is a threaded steel bar, and the anti-collapse layer 4 is a concrete pouring layer.

[0023] like Figure 3 As shown, the connector 62 is a cross-shaped connector, and a plurality of integrally formed anti-sliding blocks 621 are provided in the connection port of the connector 62. An integrally formed reinforcing plate 622 is provided on the outer side of the connector 62. The threaded groove on the support rod 61 engages with the anti-sliding blocks 621.

[0024] Construction steps: First, select the land base 1 of the road foundation that needs to be repaired, excavate a foundation pit 2 on the land base 1, fill the foundation pit 2 with a sand and gravel filling layer 3 and tamp it, excavate installation grooves 8 on both sides of the foundation pit 2, fix the support plate 7 at the bottom of the installation groove 8, assemble the support rod 61 and the connector 62 according to the shape of the foundation pit 2 to form a reinforcing net 6, put the two sides of the reinforcing net 6 on the top of the support plate 7, pour concrete into the foundation pit 2 to form an anti-collapse layer 4, the reinforcing net 6 is located in the middle of the anti-collapse layer 4, after the anti-collapse layer 4 solidifies, lay a backfill layer 5 on the top of the anti-collapse layer 4, and tamp the foundation pit 2 and the backfill layer 5 to complete the construction of the anti-collapse karst foundation.

[0025] Note: When selecting the construction location, it is necessary to bypass areas with a large area of ​​underground karst. The excavation of foundation pit 2 needs to have a width in one of the horizontal and vertical directions that is greater than the width of the underground karst.

[0026] Working principle: first lay a gravel filling layer 3 in the foundation pit 2 and then pour the anti-collapse layer 4 on the gravel filling layer 3 to increase the contact area at the bottom of the anti-collapse layer 4, so as to improve the bearing capacity of the anti-collapse layer 4 and improve the drainage capacity of the foundation to prevent the anti-collapse layer 4 from being damaged and affecting the foundation strength. A reinforcing net 6 is arranged in the anti-collapse layer 4, and both sides of the reinforcing net 6 are inserted into the installation groove 8 on the foundation pit 2 to further increase the force-bearing area of ​​the anti-collapse layer 4. A supporting plate 7 is arranged in the installation groove 8, which is perpendicular to the reinforcing net 6 to support the anti-collapse layer 4 in both horizontal and vertical directions. The foundation structure has a high degree of integrity. When a small-scale collapse occurs under the land base 1, the reinforcing net 6 and the supporting plate 7 cooperate with each other to lift the anti-collapse layer 4 and reduce the impact of the collapse on the foundation structure. When a large-scale collapse occurs under the land base 1 and its size does not exceed the size of the foundation pit 2, the integrated design can also slow down the collapse speed of the foundation structure.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A karst foundation structure for preventing collapse, comprising a soil base (1), characterized in that: A foundation pit (2) is provided on the top of the soil base (1); a gravel filling layer (3) is provided at the bottom of the foundation pit (2); an anti-collapse layer (4) is provided on the top of the gravel filling layer (3); a backfill layer (5) is provided on the top of the anti-collapse layer (4); a reinforcing net (6) is provided in the anti-collapse layer (4); both sides of the reinforcing net (6) are located outside the anti-collapse layer (4); installation grooves (8) are provided in the middle of both sides of the foundation pit (2); and the reinforcing nets (6) located outside the anti-collapse layer (4) are clamped and fixed in the installation grooves (8).

2. The anti-collapse karst foundation structure according to claim 1, characterized in that: A supporting plate (7) is fixedly installed in the installation groove (8), and the supporting plate (7) abuts against the bottom of the external reinforcing net (6) on both sides of the anti-collapse layer (4), and the external reinforcing net (6) on both sides of the anti-collapse layer (4) and the supporting plate (7) are perpendicular to each other.

3. The anti-collapse karst foundation structure according to claim 1, characterized in that: The reinforcing net (6) comprises a support rod (61) and a connector (62), wherein the support rod (61) is snap-connected in the connector (62).

4. The anti-collapse karst foundation structure according to claim 1, characterized in that: The anti-collapse layer (4) is a concrete pouring layer.

5. The anti-collapse karst foundation structure according to claim 3, characterized in that: The support rod (61) is threaded steel.

6. The anti-collapse karst foundation structure according to claim 5, characterized in that: The connector (62) is a cross-shaped connector, a plurality of integrally formed anti-sliding blocks (621) are provided in the connection port of the connector (62), an integrally formed reinforcing plate (622) is provided on the outside of the connector (62), and the threaded groove on the support rod (61) is meshed with the anti-sliding blocks (621).

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