Subway tunnel reinforcing and connecting structure for underground construction of high-rise building

Abstract

The utility model provides a subway tunnel reinforcing and connecting structure for underground construction of a high-rise building. The subway tunnel reinforcing and connecting structure comprises a jet grouting pile, a radial grouting structure and a connecting device. The jet grouting pile is arranged between a building and a tunnel lining, and the radial grouting structure close to the jet grouting pile is connected with the jet grouting pile through a connecting device. And the concrete dispersion area is connected with the radial grouting structure through a connecting device. Through the jet grouting piles, a subway tunnel construction area and a high-rise building foundation are separated, and mutual disturbance of the two areas is avoided; the jet grouting piles, the radial grouting structures and the jet grouting piles are connected through the connecting devices, and the tunnel lining structure is further stabilized; the concrete dispersion area well reinforces a soil layer near the foundation of the high-rise building, and the concrete dispersion area, the jet grouting piles and the radial grouting structure are called a whole, so that underground disturbance of tunnel construction to the high-rise building is isolated.

Description

Technical Field

[0001] This utility model relates to the field of subway tunnel construction, and in particular to a subway tunnel reinforcement and connection structure for underground construction of high-rise buildings. Background Technology

[0002] With urban development, subways are being built more and more frequently. Cities are filled with high-rise buildings and complex environments, meaning subways often inevitably end up near these structures.

[0003] However, subway construction inevitably disturbs the underground foundations and soil layers near the foundations of high-rise buildings, posing a potential safety hazard to these buildings. Utility Model Content

[0004] This utility model provides a reinforcement connection structure for subway tunnels used in underground construction of high-rise buildings to overcome the above-mentioned problems.

[0005] A reinforcement connection structure for subway tunnels used in underground construction of high-rise buildings includes: jet grouting piles, radial grouting structure, and connection device;

[0006] The jet grouting pile is located between the building and the tunnel lining, and the lower part of the jet grouting pile is inclined towards the building;

[0007] The radial grouting structure is a structure formed by the solidification of concrete grout, and extends radially outward along the tunnel lining to the surrounding soil and rock layers. The radial grouting structure near the jet grouting pile is connected to the jet grouting pile through the connecting device.

[0008] A concrete dispersion zone is provided on the side of the jet grouting pile away from the tunnel, and the concrete dispersion zone is connected to the radial grouting structure through the connecting device.

[0009] Furthermore, the connecting device includes a cylindrical body with an upper cover and a lower bottom, longitudinal ribs passing through the upper cover and the lower bottom, and elastic claws fixed to the outside of the cylindrical body, and a protective sleeve is sleeved on the outside of the cylindrical body and the elastic claws.

[0010] The cylinder has an inlet pipe and an outlet pipe, the inlet pipe facing the grouting hole of the radial grouting structure, and the outlet pipe facing the concrete dispersion zone.

[0011] Furthermore, one end of the elastic claw is fixed to the outside of the cylinder, and the other end is provided with a locking tooth that opens outward to lock onto the side wall of the jet grouting pile hole.

[0012] Furthermore, the cylinder is positioned inside the protective sleeve via the elastic claw. When the connecting device moves downward along the jet grouting pile hole to the designated position, the protective sleeve can disengage from the connecting device, causing the connecting device to lock inside the jet grouting pile hole.

[0013] Furthermore, the inner sides of the upper cover and the lower bottom are provided with rubber rings, and the longitudinal ribs pass through the rubber rings.

[0014] This utility model discloses a subway tunnel reinforcement connection structure for underground construction of high-rise buildings. It uses jet grouting piles to isolate the subway tunnel construction area from the high-rise building foundation, preventing mutual disturbance between the two areas. A connecting device connects the jet grouting piles and the radial grouting structure to the jet grouting piles, further stabilizing the tunnel lining structure. Furthermore, a concrete dispersion zone is provided on the side of the jet grouting piles closest to the high-rise building. This concrete dispersion zone effectively reinforces the soil layer near the high-rise building foundation and forms an integral whole with the jet grouting piles and radial grouting structure, isolating the underground disturbance of the high-rise building caused by tunnel construction. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a subway tunnel reinforcement connection structure for underground construction of high-rise buildings disclosed in an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the connection between the jet grouting pile hole and the injection hole in an embodiment of this utility model;

[0018] Figure 3 This is a schematic diagram of the connecting device structure in an embodiment of the present utility model;

[0019] Figure 4 This is a top view of the connecting device in an embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of the connecting device in the jet grouting pile hole in an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram showing the connection between the connecting device and the grouting pipe in an embodiment of this utility model;

[0022] Figure 7 This is a cross-sectional schematic diagram of the connection structure between the connecting device and the grouting pipe in an embodiment of this utility model;

[0023] Figure 8 This is a schematic diagram of the bottom structure in an embodiment of this utility model.

[0024] In the picture:

[0025] 1. Jet grouting pile; 2. Radial grouting structure; 3. Connecting device; 31. Top cover; 32. Bottom; 33. Cylinder; 34. Elastic claw; 35. Protective sleeve; 36. Inlet pipe; 37. Outlet pipe; 38. Longitudinal reinforcement; 4. High-rise building; 5. Concrete dispersion zone; 6. Tunnel; 7. Jet grouting pile hole; 8. Grouting hole; 9. Grouting pipe; 10. Rubber ring. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] like Figures 1-7 As shown, this embodiment discloses a subway tunnel reinforcement connection structure for underground construction of high-rise buildings, including: jet grouting piles, radial grouting structure and connection device;

[0028] Jet grouting piles are installed between the building and the tunnel lining, and the lower part of the jet grouting piles is inclined towards the building;

[0029] The radial grouting structure is a structure formed by the solidification of concrete grout, and extends radially outward along the tunnel lining to the surrounding soil and rock layers. The radial grouting structure near the jet grouting pile is connected to the jet grouting pile through a connecting device.

[0030] A concrete dispersion zone is set on the side of the jet grouting pile away from the tunnel, and the concrete dispersion zone is connected to the radial grouting structure through a connecting device.

[0031] This utility model discloses a subway tunnel reinforcement connection structure for underground construction of high-rise buildings. It uses jet grouting piles to isolate the subway tunnel construction area from the high-rise building foundation, preventing mutual disturbance between the two areas. A connecting device connects the radial grouting structure to the jet grouting piles, further stabilizing the tunnel lining structure. Furthermore, a concrete dispersion zone is provided on the side of the jet grouting piles closest to the high-rise building. This concrete dispersion zone effectively reinforces the soil layer near the high-rise building foundation and forms an integral whole with the jet grouting piles and radial grouting structure, effectively isolating the underground disturbance of the high-rise building caused by tunnel construction.

[0032] In this embodiment, the jet grouting piles are inclined, which can better separate the tunnel and the foundation of the high-rise building. At the same time, the radial grouting structure and the concrete dispersion zone increase the overall stability and disturbance resistance of the structure.

[0033] like Figure 3As shown, in this embodiment, the connecting device includes a cylinder with an upper cover and a lower bottom, longitudinal ribs passing through the upper cover and the lower bottom, and elastic claws fixed to the outside of the cylinder. A protective sleeve is fitted on the outside of the cylinder and the elastic claws.

[0034] The cylinder has an inlet pipe and an outlet pipe. The inlet pipe faces the grouting hole of the radial grouting structure, and the outlet pipe faces the concrete dispersion zone.

[0035] The connecting device is a cylindrical body closed at both ends, with holes on the top cover and bottom. The longitudinal reinforcement passes through the holes. Stirrups are provided on the longitudinal reinforcement extending from both ends of the connecting device, which allows the steel reinforcement to bond better with the concrete and improves the performance of the pile.

[0036] The flexible claws are made of flexible metal and are fixed to the outside of the cylinder by welding.

[0037] The inner diameter of the protective sleeve is slightly larger than that of the connecting device. The elastic claws are compressed inside the protective sleeve, and the connecting device is fixed inside the protective sleeve by the elastic claws.

[0038] The upper end of the protective sleeve is equipped with a lifting lug for easy hoisting to the designated position in the pile hole.

[0039] In this embodiment, one end of the elastic claw is fixed to the outside of the cylinder, and the other end is provided with a locking tooth that opens outward to lock onto the side wall of the jet grouting pile hole.

[0040] like Figure 3 As shown in this embodiment, the cylinder is placed inside the protective sleeve by elastic claws. When the connecting device moves downward along the jet grouting pile hole to the designated position, the protective sleeve can disengage from the connecting device, so that the connecting device is locked inside the jet grouting pile hole.

[0041] like Figure 4 As shown, the elastic claw is located on the side of the cylinder body away from the outlet pipe. When the connecting device gradually separates from the protective sleeve, the elastic claw pops out and locks onto the inner wall of the jet grouting pile hole. At the same time, the elastic force of the elastic claw causes the connecting device to move towards the jet grouting pile hole, and the outlet pipe enters the grouting hole, providing a structural foundation for subsequent high-pressure grouting.

[0042] like Figure 8 As shown in this embodiment, rubber rings are provided on the inner sides of the upper cover and the lower bottom. The longitudinal ribs pass through the rubber rings. The rubber rings can seal the longitudinal ribs with the upper cover or the lower bottom, preventing cement slurry from passing through the upper cover or the lower bottom.

[0043] The construction process in this embodiment is as follows:

[0044] A hollow cylinder with an upper cover and a lower bottom is made by welding. The longitudinal ribs run through the upper cover and the lower bottom. The longitudinal ribs exposed outside the cylinder are tied with stirrups. Elastic claws are welded to the outside of the cylinder to form a connecting device. A protective sleeve is then installed on the connecting device.

[0045] After the pile location is measured and marked out, the drilling rig is positioned and the angle is adjusted before drilling begins to the designed depth to form the jet grouting pile hole. Grouting holes are then made from the tunnel outwards. After the grouting holes are connected to the jet grouting pile holes, drilling continues until the jet grouting pile is passed through and the hole is penetrated into the soil layer to a certain depth.

[0046] Cement grout is injected into the jet grouting pile hole under high pressure through the drill rod, while the drill rod is rotated at a constant speed to raise it, so that the grout is fully mixed with the soil. When the grout reaches the height of the injection hole, the injection is paused.

[0047] The protective sleeve and connecting device are lowered into the jet grouting pile hole to the pre-measured position of the grouting pipe. A long steel pipe is used to hold the top cover of the connecting device in place, while the protective sleeve is simultaneously lifted upwards, detaching the connecting device from the protective sleeve. The protective sleeve is then lowered back to the ground. Figure 5 As shown, the elastic claw of the connecting device releases outward and locks into the jet grouting pile hole. Under the elastic force of the elastic claw, the outlet pipe enters the grouting hole on the other side.

[0048] Continue to inject cement grout into the jet grouting pile. The cement grout seeps into the space between the connecting device and the pile hole and gradually fills it upwards until a complete pile body is formed. At the same time, a grouting pipe is inserted into the connecting device from inside the tunnel.

[0049] The longitudinal reinforcement and stirrups at the top and bottom of the connecting device are combined with the jet grouting pile body to increase the overall strength.

[0050] In this embodiment, a measuring instrument is used to mark the precise location of the connection point with the radial grouting pipe, including the angle and depth, to ensure that the grouting port and the grouting pipe are firmly connected and there is no leakage before radial grouting is performed.

[0051] like Figure 6 , Figure 7 As shown, the grouting pipe has a clamp at the end and an annular groove on the inner wall of the inlet pipe, which allows the grouting pipe to be easily inserted into the inlet pipe, enabling high-pressure grouting and preventing it from falling off.

[0052] The cement grout is injected into the connecting device through the grouting pipe. After filling the connecting device, it flows out from the outlet pipe and enters the grouting hole on the side of the jet grouting pile away from the tunnel. The grouting pipe continues to inject under high pressure, and the cement grout diffuses into the soil layer to form a concrete dispersion zone.

[0053] The grouting pipe has small holes, allowing cement grout to seep out in appropriate amounts under high pressure and enter the grouting hole near the tunnel. The grouting hole on the tunnel lining side is sealed with the grouting pipe, so that the cement grout and the grouting pipe form a radial grouting structure.

[0054] After the cement solidifies, the radial grouting structure, jet grouting piles, and concrete dispersion zone form an integrated reinforced connection structure. The outside of the connection structure is encased in concrete from the jet grouting piles. At the same time, the upper and lower longitudinal bars and stirrups strengthen the connection strength between the two pile sections. The jet grouting piles, through the connection structure, form an integral whole with the radial grouting structure and concrete dispersion zone, which greatly improves the resistance to soil disturbance and the stability of the underground foundation of high-rise buildings.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A reinforcement and connection structure for subway tunnels used in underground construction of high-rise buildings, characterized in that, include: Jet grouting piles, radial grouting structures, and connecting devices; The jet grouting pile is located between the building and the tunnel lining, and the lower part of the jet grouting pile is inclined towards the building; The radial grouting structure is a structure formed by the solidification of concrete grout, and extends radially outward along the tunnel lining to the surrounding soil and rock layers. The radial grouting structure near the jet grouting pile is connected to the jet grouting pile through the connecting device. A concrete dispersion zone is provided on the side of the jet grouting pile away from the tunnel, and the concrete dispersion zone is connected to the radial grouting structure through the connecting device.

2. The reinforcement and connection structure for subway tunnels used in underground construction of high-rise buildings according to claim 1, characterized in that, The connecting device includes a cylindrical body with an upper cover and a lower bottom, longitudinal ribs passing through the upper cover and the lower bottom, and elastic claws fixed to the outside of the cylindrical body. A protective sleeve is fitted on the outside of the cylindrical body and the elastic claws. The cylinder has an inlet pipe and an outlet pipe, the inlet pipe facing the grouting hole of the radial grouting structure, and the outlet pipe facing the concrete dispersion zone.

3. The reinforcement and connection structure for subway tunnels used in underground construction of high-rise buildings according to claim 2, characterized in that, One end of the elastic claw is fixed to the outside of the cylinder, and the other end is provided with a locking tooth that opens outward to lock onto the side wall of the jet grouting pile hole.

4. A subway tunnel reinforcement and connection structure for underground construction of high-rise buildings according to claim 2, characterized in that, The cylinder is positioned inside the protective sleeve via the elastic claw. When the connecting device moves downward along the jet grouting pile hole to the designated position, the protective sleeve can disengage from the connecting device, causing the connecting device to lock inside the jet grouting pile hole.

5. A subway tunnel reinforcement and connection structure for underground construction of high-rise buildings according to claim 2, characterized in that, The upper cover and the inner side of the lower bottom are provided with rubber rings, and the longitudinal ribs pass through the rubber rings.

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