Tunnel pile sinking reducing structure

Abstract

The utility model relates to the field of tunnel engineering, in particular to a tunnel pile sinking reducing structure which comprises a plurality of pile bodies and a pile cap, the pile cap is of a flat plate structure, a casing pipe is arranged at the bottom of the pile cap, the casing pipe is matched with the pile bodies, installation holes are formed in the casing pipe in a surrounding mode, fixing bolts penetrate through the installation holes, and the fixing bolts are fixedly connected with the pile bodies. The fixing bolt is matched with the pile body; the cushion layer is laid above the pile cap, a groove is further formed in the side of the pile cap, powerful support is provided for a tunnel through the multiple pile bodies penetrating into the stratum and the tunnel pile sinking reducing device, settlement of a foundation in the tunnel construction and operation process is effectively prevented, the stability of the tunnel foundation is remarkably improved, and the construction period is shortened. The casing pipe designed at the bottom of the pile cap is tightly matched with the pile body and is firmly connected with the pile body through the fixing bolt, and the connecting mode ensures the connecting strength between the pile cap and the pile body, so that the pile cap can more effectively transmit the upper load to the pile body.

Description

Technical Field

[0001] The utility model relates to the field of tunnel engineering, in particular to a tunnel settlement reducing pile structure. Background Art

[0002] Foundation settlement not only seriously threatens the overall stability and safety of the tunnel, but may also cause significant negative impacts on the natural environment and existing buildings around the tunnel, including but not limited to foundation cracking, building tilting and even collapse.

[0003] Faced with this challenge, tunnel engineers have been seeking more efficient, economical and reliable methods of foundation reinforcement. Although traditional grouting reinforcement and anchor reinforcement can alleviate the foundation settlement problem to a certain extent, their limitations are gradually becoming apparent. Although grouting reinforcement can fill the gaps in the stratum, its reinforcement effect is often affected by multiple factors such as stratum conditions and grouting materials, and the construction process is complicated and costly. Anchor reinforcement mainly provides additional support by driving anchors around the tunnel, but its reinforcement effect is also limited by factors such as stratum stability, anchor length and diameter, and its reinforcement effect on deep foundations is limited. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the utility model provides a tunnel settlement reducing pile structure.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: A tunnel settlement reduction pile structure of the utility model comprises the following components:

[0007] A number of piles, used to penetrate deep into the ground to provide support;

[0008] The pile cap is a flat plate structure. A sleeve is provided at the bottom of the pile cap. The sleeve is adapted to the pile body. A mounting hole is provided around the sleeve. A fixing bolt is passed through the mounting hole. The fixing bolt is adapted to the pile body.

[0009] The cushion layer is laid on top of the pile cap to adjust the load sharing between the pile body and the soil between the piles;

[0010] Among them, the side of the pile cap is also provided with a groove, and the grooves on the symmetrical sides of the pile cap are designed so that the groove on one side is located at the top of the pile cap, and the groove on the other side is located at the bottom of the pile cap, and adjacent pile caps are spliced ​​through the upper and lower symmetrical grooves; the groove is penetrated by a fixing hole, and the fixing hole is penetrated by a connecting bolt, and the connecting bolt passes through the fixing hole through a threaded structure.

[0011] Preferably, a plurality of slots are provided on the top of the pile cap, and reinforcing steel bars are arranged in the slots.

[0012] Further preferably, the reinforcing steel bars in the slots connecting adjacent pile caps are designed to be the same.

[0013] Again preferably, the slots are in groups of at least three and are arranged circumferentially on the pile cap.

[0014] Preferably, four groups of the slots are arranged around the pile cap.

[0015] Further preferably, the pile body is made of either steel or concrete.

[0016] Again preferably, the cushion layer is any one of crushed stone and sand material.

[0017] Compared with the prior art, the utility model provides a tunnel settlement reduction pile structure, which has the following beneficial effects:

[0018] Significantly improve tunnel foundation stability:

[0019] Through a number of piles that penetrate deep into the ground, the tunnel settlement reducing pile device provides strong support for the tunnel, effectively preventing the foundation from settling during tunnel construction and operation, and significantly improving the stability of the tunnel foundation.

[0020] Enhance the connection strength between pile cap and pile body:

[0021] The casing designed at the bottom of the pile cap fits tightly with the pile body and is firmly connected by fixing bolts. This connection method ensures the connection strength between the pile cap and the pile body, allowing the pile cap to more effectively transfer the upper load to the pile body.

[0022] Improve the bearing capacity of pile cap:

[0023] Reinforced steel bars are arranged in the grooves at the top of the pile cap. These reinforced steel bars significantly enhance the strength and rigidity of the pile cap, enabling it to better resist external loads and ground pressure, and improving the bearing capacity of the pile cap.

[0024] Optimize the connection and integrity between pile caps:

[0025] The upper and lower symmetrical grooves on the side of the pile cap and the connecting bolts running through the fixing holes enable adjacent pile caps to be tightly spliced ​​together to form an integral structure. This design not only enhances the connection strength between the pile caps, but also improves the integrity and stability of the entire pile system.

[0026] Enhance structural adaptability and flexibility:

[0027] The reinforcing steel bars are designed to be the same in the slots of adjacent pile caps. This design makes the structure more flexible and can adapt to changes in different working conditions and load conditions. At the same time, the slots are set around the pile caps and can be set in four groups as needed, further enhancing the adaptability and flexibility of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the installation of a pile cap and reinforcement structure for the pile body of the utility model;

[0029] Figure 2 It is a schematic diagram of the splicing structure of multiple pile bodies and pile caps of the utility model;

[0030] Figure 3 This is a schematic diagram of the overall pile-sinking structure of the utility model;

[0031] In the figure: 1. Pile body; 2. Pile cap; 3. Casing; 4. Fixing bolt; 5. Groove; 6. Fixing hole; 7. Slot; 8. Reinforcement steel bar; 9. Cushion layer. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] See also Figure 1-3 The utility model provides a tunnel settlement reduction pile structure, comprising the following components:

[0034] A plurality of piles 1, used to penetrate into the ground to provide support;

[0035] The pile cap 2 is a flat plate structure. A sleeve 3 is provided at the bottom of the pile cap 2. The sleeve 3 is adapted to the pile body 1. A mounting hole is provided around the sleeve 3. A fixing bolt 4 is passed through the mounting hole. The fixing bolt 4 is adapted to the pile body 1.

[0036] A cushion layer 9 is laid on top of the pile cap 2 and is used to adjust the load sharing between the pile body 1 and the soil between the piles;

[0037] Among them, the side of the pile cap 2 is also provided with a groove 5, and the grooves 5 on the symmetrical sides of the pile cap 2 are designed so that the groove 5 on one side is located at the top of the pile cap 2, and the groove 5 on the other side is located at the bottom of the pile cap 2, and the adjacent pile caps 2 are spliced ​​through the grooves 5 that are symmetrical up and down; the groove 5 is penetrated by a fixing hole 6, and the fixing hole 6 is penetrated by a connecting bolt, and the connecting bolt penetrates the fixing hole 6 through a threaded structure.

[0038] Connection mechanism between pile body 1 and pile cap 2:

[0039] The pile body 1 is the main supporting structure deep into the ground and provides a stable foundation for the tunnel through its high bearing capacity.

[0040] The pile cap 2 is designed as a flat plate structure with a sleeve 3 at the bottom, which can be tightly fitted on the pile body 1. The mounting holes on the sleeve 3 are penetrated by bolts, which are matched with the pile body 1 to achieve a firm connection between the pile cap 2 and the pile body 1. This connection method ensures that the pile cap 2 can effectively transfer the load of the superstructure to the pile body 1, preventing the pile body 1 from displacement or settlement.

[0041] Strengthening effect of reinforcing steel bar 8:

[0042] A plurality of slots 7 are provided on the top of the pile cap 2, and reinforcing steel bars 8 are arranged in the slots 7. The addition of the reinforcing steel bars 8 significantly improves the strength and rigidity of the pile cap 2, enabling it to better resist the load from the upper structure and the pressure of the stratum.

[0043] The reinforcing steel bars 8 in the interconnected slots 7 between adjacent pile caps 2 are designed to be the same. This design enhances the continuity and integrity of the entire pile cap 2 structure, and improves the stability and bearing capacity of the structure.

[0044] Optimization of slot 7 design:

[0045] The slots 7 are arranged in groups of at least three and are arranged around the pile cap 2 . This arrangement is conducive to dispersing and resisting loads in multiple directions, thereby improving the bending and shearing resistance of the pile cap 2 .

[0046] Four groups of slots 7 are arranged around the pile cap 2 to ensure that the pile cap 2 can adapt to different working conditions.

[0047] Material selection for pile body 1 and cushion layer 9:

[0048] The pile body 1 is made of either steel or concrete, both of which have high strength and durability and can meet the requirements of tunnel engineering on foundation bearing capacity.

[0049] The cushion layer 9 is made of either crushed stone or sand. The function of the cushion layer 9 is to adjust the load sharing between the pile and the soil between the piles, reduce the amount of penetration of the pile top into the cushion layer 9, and at the same time improve the bearing capacity and stability of the foundation. The top layer can also be made of a mixture of crushed stone and sand.

[0050] The tunnel settlement reduction pile device is mainly composed of several pile bodies 1, pile caps 2, and cushion layers 9. The various components work together to effectively control the settlement of the tunnel foundation. The following is a detailed summary of the working principle of the device:

[0051] Supporting function of pile 1:

[0052] Several piles 1 are driven deep into the ground to provide stable support for the tunnel with their high strength and high bearing capacity. As the main load-bearing structure, the piles 1 can effectively disperse and transfer the load from the tunnel superstructure to prevent the foundation from settling.

[0053] Connection and reinforcement of pile cap 2:

[0054] The pile cap 2 is designed as a flat plate structure, and a sleeve 3 adapted to the pile body 1 is provided at the bottom thereof. The sleeve 3 is surrounded by mounting holes, and the pile cap 2 and the pile body 1 are tightly connected together by fixing bolts 4. This connection method ensures the firmness between the pile cap 2 and the pile body 1, so that the pile cap 2 can effectively transfer the upper load to the pile body 1.

[0055] A groove 5 is also provided on the side of the pile cap 2, and the groove 5 is designed to be symmetrical up and down, that is, the groove 5 on one side is located at the top of the pile cap 2, and the groove 5 on the other side is located at the bottom of the pile cap 2. This design allows adjacent pile caps 2 to be spliced ​​through the symmetrical grooves 5 and fastened by connecting bolts passing through the fixing holes 6. This splicing method not only enhances the connection strength between the pile caps 2, but also improves the integrity and stability of the entire pile body 1 system.

[0056] Load adjustment of cushion layer 9:

[0057] The cushion layer 9 is laid on top of the pile cap 2, and its main function is to adjust the load sharing between the pile body 1 and the soil between the piles. The cushion layer 9 has a certain thickness and compressibility, and can effectively absorb and disperse the load during tunnel operation, reduce the amount of penetration of the pile top into the cushion layer 9, and thus protect the pile body 1 and the soil between the piles from damage.

[0058] The cushion layer 9 can also improve the bearing capacity of the foundation, and improve the stability and safety of the foundation. Through a reasonable design of the cushion layer 9, the settlement of the tunnel foundation can be effectively controlled, and the long-term operation safety of the tunnel can be guaranteed.

[0059] In summary, the tunnel settlement reducing pile device achieves effective control of tunnel foundation settlement through the coordinated work of the supporting function of the pile body 1, the connection and reinforcement of the pile cap 2, and the load adjustment of the cushion layer 9. The device has the advantages of simple structure, convenient construction, and significant effect, and has broad application prospects in tunnel engineering.

[0060] 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 tunnel settlement reducing pile structure, characterized in that: Includes the following components: A plurality of piles (1) are used to penetrate into the ground to provide support; The pile cap (2) is a flat plate structure. A sleeve (3) is provided at the bottom of the pile cap (2). The sleeve (3) is adapted to the pile body (1). A mounting hole is provided around the sleeve (3). A fixing bolt (4) passes through the mounting hole. The fixing bolt (4) is adapted to the pile body (1). A cushion layer (9) is laid on top of the pile cap (2) and is used to adjust the load sharing between the pile body (1) and the soil between the piles; The side of the pile cap (2) is further provided with a groove (5), and the grooves (5) on the symmetrical sides of the pile cap (2) are designed so that the groove (5) on one side is located at the top of the pile cap (2), and the groove (5) on the other side is located at the bottom of the pile cap (2), and adjacent pile caps (2) are spliced ​​through the grooves (5) that are symmetrical up and down; the grooves (5) are penetrated by fixing holes (6), and the fixing holes (6) are penetrated by connecting bolts, and the connecting bolts penetrate the fixing holes (6) through a threaded structure.

2. A tunnel settlement reducing pile structure according to claim 1, characterized in that: A plurality of slots (7) are provided on the top of the pile cap (2), and reinforcing steel bars (8) are arranged in the slots (7).

3. A tunnel settlement reducing pile structure according to claim 2, characterized in that: The reinforcing steel bars (8) in the mutually connected slots (7) of adjacent pile caps (2) are designed to be the same.

4. A tunnel settlement reducing pile structure according to claim 3, characterized in that: The slots (7) are arranged in groups of at least three and are arranged circumferentially on the pile cap (2).

5. A tunnel settlement reducing pile structure according to claim 4, characterized in that: Four groups of the slots (7) are arranged around the pile cap (2).

6. A tunnel settlement reducing pile structure according to claim 5, characterized in that: The pile body (1) is made of either steel or concrete.

7. A tunnel settlement reducing pile structure according to claim 6, characterized in that: The cushion layer (9) is any one of crushed stone and sandy soil materials.

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