Tunnel foundation pit slope geology pressure applying supporting device

Abstract

The invention discloses a tunnel foundation pit slope geology pressure-applying supporting device which comprises a combined pressure-applying main beam, the combined pressure-applying main beam comprises a beam body, one side of the beam body is provided with an inserting groove, and one end of the beam body is fixedly connected with an inserting block; the invention belongs to the technical field of tunnel foundation pit construction, and aims at solving the problems that in the prior art, flexible combination cannot be conducted according to the sizes and shapes of different foundation pits, and the construction efficiency is high. In order to solve the problems that the existing supporting device cannot accurately adjust the supporting force in real time according to the actual stress condition of a side slope, the combined type pressure applying main beam has the technical effects that the combined type pressure applying main beam is arranged, splicing and assembling can be conveniently carried out by utilizing an inserting groove and an inserting block on a beam body, flexible adjustment can be carried out according to the actual size and shape of a tunnel foundation pit, and the supporting force can be accurately adjusted in real time. And the construction efficiency and the applicability of the device are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel foundation pit construction, and in particular to a tunnel foundation pit slope geological pressure support device. Background Art

[0002] Foundation pit engineering is a systematic engineering that integrates geological engineering, geotechnical engineering, structural engineering and geotechnical testing technology. Its main contents include engineering survey, support structure design and construction, earth excavation and backfilling, groundwater control, information construction and surrounding environmental protection. The simplest and most economical way to construct a foundation pit is to excavate the slope, but it is often restricted by site conditions and the surrounding environment. Therefore, it is necessary to design a support system to ensure the smooth progress of the construction and better protect the surrounding environment. In the process of tunnel foundation pit construction, the stability of the slope is very important. It is directly related to the life safety of construction personnel, the progress of the project and the safety of the surrounding environment. At present, there are many shortcomings in the existing tunnel foundation pit slope geological pressure support device.

[0003] Traditional support beams are mostly one-piece structures that cannot be flexibly combined according to the size and shape of different foundation pits. At the same time, the current support device cannot adjust the support force in real time and accurately according to the actual force of the slope. When the geological conditions of the slope change or are affected by external factors, it is impossible to respond in time, which can easily lead to insufficient or excessive support problems, affecting the stability of the slope. At the same time, the existing anchor mechanism often cannot be well combined with the surrounding soil during the anchoring process, and the anchoring force is limited, which is prone to loosening and pulling out of the anchor, thereby reducing the reliability of the entire support device. Summary of the invention

[0004] To this end, the present invention provides a tunnel foundation pit slope geological pressure support device to solve the above-mentioned problems in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: According to a first aspect of the present invention, a geological pressure support device for a tunnel foundation pit slope comprises a combined pressure main beam, the combined pressure main beam comprises a beam body, a plug-in groove is provided on one side of the beam body, and a plug-in block is fixedly connected to one end of the beam body; a pressure support mechanism, the pressure support mechanism comprises a first pressure plate, a second guide tube is fixedly connected to the surface of the first pressure plate, and a guide rod is slidably connected to the inside of the second guide tube; a pressure mechanism, the pressure mechanism comprises a mounting plate, an air bag is fixedly connected to one side of the mounting plate, a pressure sensor is fixedly connected to the other side of the mounting plate, and a side of the pressure sensor away from the mounting plate is fixedly connected to one side of the first pressure plate; an end expansion anchor mechanism, the end expansion anchor mechanism comprises an anchor tube body deeply nailed to the inside of the tunnel foundation pit slope, a force-bearing head is provided at one end of the anchor tube body, and an expansion sheet is provided on the surface of the anchor tube body.

[0006] Furthermore, the combined pressure main beam also includes a first guide tube, the inner wall of the first guide tube overlaps the surface of the anchor tube body, and one side of the beam body is fixedly connected to one side of the first pressure plate.

[0007] Furthermore, the pressure support mechanism also includes a limit block, the interior of the limit block is threadedly connected to one end of the guide rod, and the other end of the guide rod is fixedly connected to a second pressure plate.

[0008] Furthermore, the structure of the second pressure plate is the same as that of the first pressure plate, and the side of the second pressure plate away from the guide rod is in contact with the tunnel foundation pit slope.

[0009] Furthermore, the first pressure plate includes a plate body, one side of the plate body is provided with an engaging combination groove, and the other side of the plate body is provided with an engaging combination edge.

[0010] Furthermore, the pressurizing mechanism also includes an inflation tube, one end of which is connected to the inflation port of the airbag, and a one-way valve is arranged inside the inflation tube.

[0011] Furthermore, an air pump is provided at one end of the inflation tube away from the airbag, and the air pump is connected to the pressure sensor signal.

[0012] Furthermore, a pressure plate is fixedly connected to a side of the airbag away from the mounting plate, and one side of the pressure plate overlaps a side of the second pressure plate close to the guide rod.

[0013] Furthermore, the end expansion anchor mechanism further comprises an expansion block, the expansion block is arranged on the inner wall of the expansion sheet, and an ejector rod is inserted into the interior of the anchor tube body.

[0014] Furthermore, one end of the ejector rod is fixedly connected to a plug rod, one end of the ejector rod close to the expansion block is arranged as a round head, and one side of the expansion block close to the ejector rod is arranged as a slope.

[0015] The present invention has the following advantages: through the setting of the combined pressure main beam, the plug-in grooves and plug-in blocks on the beam body can be used for convenient splicing and assembly, and can be flexibly adjusted according to the actual size and shape of the tunnel foundation pit, which greatly improves the construction efficiency and the applicability of the device. The air bag and the pressure sensor in the pressurizing mechanism cooperate with each other, and the air pump can accurately control the inflation amount of the air bag according to the pressure information fed back by the pressure sensor, so as to achieve precise pressure on the slope and ensure that the supporting force always meets the requirements of slope stability. At the same time, the design of the second guide tube and the guide rod in the pressure support mechanism provides a stable guiding effect for the support process, ensures that the second pressure plate can accurately apply pressure to the slope, and improves the stability and reliability of the support. The expansion plate and the expansion block design of the end expansion anchor mechanism, when the ejection rod is inserted, the expansion block will cause the expansion plate to expand outward and tightly combine with the surrounding soil, which greatly improves the anchoring force of the anchor, enhances the stability of the entire support device, and makes it easier to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the main structure of the installation state of a tunnel foundation pit slope geological pressure support device provided by the present invention.

[0017] Figure 2 A schematic structural diagram of the installation state of a tunnel foundation pit slope geological pressure support device provided by the present invention.

[0018] Figure 3 A schematic diagram of the exploded structure of a tunnel foundation pit slope geological pressure support device provided by the present invention.

[0019] Figure 4 A schematic structural diagram of a pressure support mechanism of a tunnel foundation pit slope geological pressure support device provided by the present invention.

[0020] Figure 5 A schematic structural diagram of a pressure mechanism of a tunnel foundation pit slope geological pressure support device provided by the present invention.

[0021] Figure 6 A schematic diagram of a single-section beam structure of a tunnel foundation pit slope geological pressure support device provided by the present invention.

[0022] Figure 7 A schematic cross-sectional structure diagram of an end expansion anchor mechanism of a tunnel foundation pit slope geological pressure support device provided by the present invention.

[0023] Figure 8A tunnel foundation pit slope geological pressure support device provided by the present invention Figure 7 Enlarged structural diagram at A in the middle.

[0024] In the figure: 11, beam body; 12, plug-in slot; 13, plug-in block; 14, first guide tube; 21, plate body; 22, meshing combination slot; 23, meshing combination edge; 24, second guide tube; 25, guide rod; 26, limit block; 27, second pressure plate; 31, mounting plate; 32, pressure sensor; 33, airbag; 34, inflation tube; 35, air pump; 36, one-way valve; 37, pressure plate; 41, anchor tube body; 42, force head; 43, expansion sheet; 44, expansion block; 45, ejector rod; 46, plug rod. DETAILED DESCRIPTION

[0025] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0026] like Figures 1 to 8 As shown, a tunnel foundation pit slope geological pressure support device in an embodiment of the first aspect of the present invention comprises a combined pressure main beam, the combined pressure main beam comprises a beam body 11, a plug-in groove 12 is provided on one side of the beam body 11, and a plug-in block 13 is fixedly connected to one end of the beam body 11; a pressure support mechanism, the pressure support mechanism comprises a first pressure plate, a second guide tube 24 is fixedly connected to the surface of the first pressure plate, and a guide rod 25 is slidably connected inside the second guide tube 24; a pressure mechanism, the pressure mechanism comprises a mounting plate 31, an air bag 33 is fixedly connected to one side of the mounting plate 31, a pressure sensor 32 is fixedly connected to the other side of the mounting plate 31, and a side of the pressure sensor 32 away from the mounting plate 31 is fixedly connected to one side of the first pressure plate; an end expansion anchor mechanism, the end expansion anchor mechanism comprises an anchor tube body 41 deeply nailed to the inside of the tunnel foundation pit slope, a force head 42 is provided at one end of the anchor tube body 41, and an expansion sheet 43 is provided on the surface of the anchor tube body 41; In the above embodiment, it should be noted that the first pressure plate is composed of a plate body 21, an engaging combination groove 22, and an engaging combination edge 23. The second guide tube 24 on its surface is slidably connected to the guide rod 25. One end of the guide rod 25 is fixedly connected to the second pressure plate 27, and the other end is threadedly connected to the guide rod 25 through a limit block 26 to prevent the guide rod 25 from being excessively withdrawn. When the device starts working, the second guide tube 24 provides a stable guide for the axial movement of the guide rod 25, ensuring that the second pressure plate 27 can accurately move in a direction perpendicular to the slope and apply uniform pressure to the slope. The technical effect achieved by the above embodiment is: when the device starts working, the second guide tube 24 provides stable guidance for the axial movement of the guide rod 25, ensuring that the second pressure plate 27 can move accurately in a direction perpendicular to the slope and apply uniform pressure to the slope. Example 2

[0027] like Figures 1 to 8 As shown, a tunnel foundation pit slope geological pressure support device includes all the contents of Example 1. In addition, the combined pressure main beam also includes a first guide tube 14, the inner wall of the first guide tube 14 overlaps the surface of the anchor tube body 41, one side of the beam body 11 is fixedly connected to one side of the first pressure plate, the pressure support mechanism also includes a limit block 26, the interior of the limit block 26 is threadedly connected to one end of the guide rod 25, and the other end of the guide rod 25 is fixedly connected to a second pressure plate 27, the structure of the second pressure plate 27 is the same as that of the first pressure plate, and the side of the second pressure plate 27 away from the guide rod 25 contacts the tunnel foundation pit slope, and the first pressure plate includes a plate body 21, one side of the plate body 21 is provided with a meshing combination groove 22, and the other side of the plate body 21 is provided with a meshing combination edge 23; In the above embodiment, it should be noted that when pressurizing, the pressure sensor 32 on one side of the mounting plate 31 monitors the pressure value applied to the first pressure plate in real time, and then indirectly detects the pressure of the second pressure plate 27 on the slope. When the pressure detected by the pressure sensor 32 is lower than the preset threshold, the pressure sensor 32 sends a signal to the air pump 35, and the air pump 35 inflates the airbag 33 through the inflation tube 34. After the airbag 33 expands, it pushes the pressurizing plate 37. Since the pressurizing plate 37 overlaps with the side of the second pressure plate 27 close to the limit block 26, the expansion force of the airbag 33 is transmitted to the second pressure plate 27, so that it moves toward the slope direction and applies greater pressure. The one-way valve 36 is arranged inside the inflation tube 34 to prevent the gas in the airbag 33 from flowing back, ensuring that the pressure is maintained stably. When the pressure sensor 32 detects that the pressure reaches the set value, the air pump 35 stops working, realizing precise closed-loop control of the slope support force, making it more convenient to use. The technical effect achieved by the above embodiment is: the expansion force of the airbag 33 is transmitted to the second pressure plate 27, so that it moves toward the slope direction and applies greater pressure, preventing the gas in the airbag 33 from flowing back and ensuring that the pressure is maintained stably. When the pressure sensor 32 detects that the pressure reaches the set value, the air pump 35 stops working, realizing precise closed-loop control of the slope supporting force, making it easier to use. Example 3

[0028] like Figures 1 to 8 As shown, a tunnel foundation pit slope geological pressure support device includes all the contents of Example 2. In addition, the pressure mechanism also includes an inflation tube 34, one end of the inflation tube 34 is connected to the inflation port of the air bag 33, a one-way valve 36 is arranged inside the inflation tube 34, an air pump 35 is arranged at the end of the inflation tube 34 away from the air bag 33, the air pump 35 is connected to the signal of the pressure sensor 32, a pressure plate 37 is fixedly connected to the side of the air bag 33 away from the mounting plate 31, one side of the pressure plate 37 overlaps with the side of the second pressure plate 27 close to the guide rod 25, the end expansion anchor mechanism also includes an expansion block 44, the expansion block 44 is arranged on the inner wall of the expansion sheet 43, an ejector rod 45 is inserted into the interior of the anchor tube body 41, one end of the ejector rod 45 is fixedly connected to the insertion rod 46, the end of the ejector rod 45 close to the expansion block 44 is arranged as a round head, and the side of the expansion block 44 close to the ejector rod 45 is arranged as a slope; In the above embodiment, it should be noted that the construction personnel can insert multiple beam bodies 11 into the plug-in slots 12 of adjacent beam bodies through the plug-in blocks 13 for splicing according to the actual length and shape of the tunnel foundation pit, so as to form a combined pressure main beam of appropriate length. During splicing, the plug-in blocks 13 cooperate with the plug-in slots 12 to achieve rapid positioning and connection without the need for complex tools. At the same time, the first guide tube 14 on one side of the beam body 11 overlaps with the anchor tube body 41, which plays a role in preliminary positioning and support, ensuring that the anchor tube body 41 is driven into the slope along the preset direction, and the anchor tube body 41 is deeply nailed to the tunnel foundation. Inside the pit slope, the anchor tube 41 is made to penetrate into the soil by knocking the force-bearing head 42, and then the ejector rod 45 is manually or mechanically driven into the anchor tube 41 through the insertion rod 46. Since the end of the ejector rod 45 close to the expansion block 44 is a round head, and the side of the expansion block 44 close to the ejector rod 45 is a slope, as the ejector rod 45 is inserted, its round head pushes the expansion block 44 to move outward, and then squeezes the expansion sheet 43 to make it expand outward. After expansion, the expansion sheet 43 fits tightly with the surrounding soil, which significantly increases the friction between the anchor tube 41 and the soil, and achieves a firm anchoring effect.

[0029] The technical effect achieved by the above embodiment is: significantly increasing the friction between the anchor tube body 41 and the soil, thereby achieving a firm anchoring effect.

[0030] Working principle: Construction workers can insert multiple beams 11 into the plug-in slots 12 of adjacent beams through the plug-in blocks 13 according to the actual length and shape of the tunnel foundation pit for splicing to form a combined pressure main beam of appropriate length. During splicing, the plug-in blocks 13 cooperate with the plug-in slots 12 to achieve rapid positioning and connection without the need for complex tools. At the same time, the first guide tube 14 on one side of the beam 11 overlaps the anchor tube 41 to play a role in preliminary positioning and support, ensuring that the anchor tube 41 is driven into the slope along the preset direction, and the anchor tube 41 is deeply nailed into the inside of the tunnel foundation pit slope. The anchor tube 41 is penetrated into the soil by knocking the force head 42. Then, The ejector rod 45 is manually or mechanically driven to be inserted into the anchor tube body 41 through the insertion rod 46. Since the end of the ejector rod 45 close to the expansion block 44 is a round head, and the side of the expansion block 44 close to the ejector rod 45 is a slope, as the ejector rod 45 is inserted, its round head pushes the expansion block 44 to move outward, thereby squeezing the expansion sheet 43 to make it expand outward. After the expansion sheet 43 expands, it fits tightly with the surrounding soil, significantly increasing the friction between the anchor tube body 41 and the soil, and achieving a firm anchoring effect. The first pressure plate is composed of a plate body 21, a meshing combination groove 22, and a meshing combination edge 23. The second guide tube 24 on its surface is slidably connected to the guide rod 25 Then, one end of the guide rod 25 is fixedly connected to the second pressure plate 27, and the other end is threadedly connected to the guide rod 25 through a limit block 26 to prevent the guide rod 25 from being excessively withdrawn. When the device starts working, the second guide tube 24 provides a stable guide for the axial movement of the guide rod 25, ensuring that the second pressure plate 27 can move accurately in a direction perpendicular to the slope and apply uniform pressure to the slope. When pressurizing, the pressure sensor 32 on one side of the mounting plate 31 monitors the pressure value applied to the first pressure plate in real time, and then indirectly detects the pressure of the second pressure plate 27 on the slope. When the pressure detected by the pressure sensor 32 is lower than the preset threshold, The pressure sensor 32 sends a signal to the air pump 35, and the air pump 35 inflates the airbag 33 through the inflation tube 34. After the airbag 33 expands, it pushes the pressure plate 37. Since the pressure plate 37 overlaps with the side of the second pressure plate 27 close to the limit block 26, the expansion force of the airbag 33 is transmitted to the second pressure plate 27, causing it to move toward the slope direction and apply greater pressure. The one-way valve 36 is arranged inside the inflation tube 34 to prevent the gas in the airbag 33 from flowing back and ensure that the pressure is maintained stably. When the pressure sensor 32 detects that the pressure reaches the set value, the air pump 35 stops working, realizing precise closed-loop control of the slope supporting force, making it easier to use.

Claims

1. A tunnel foundation pit slope geological pressure support device, characterized in that: include A combined pressure main beam, the combined pressure main beam comprising a beam body (11), a plug-in slot (12) being provided on one side of the beam body (11), and a plug-in block (13) being fixedly connected to one end of the beam body (11); A pressure support mechanism, the pressure support mechanism comprising a first pressure plate, a second guide tube (24) being fixedly connected to the surface of the first pressure plate, and a guide rod (25) being slidably connected to the interior of the second guide tube (24); A pressurizing mechanism, the pressurizing mechanism comprising a mounting plate (31), one side of the mounting plate (31) being fixedly connected to an airbag (33), the other side of the mounting plate (31) being fixedly connected to a pressure sensor (32), and a side of the pressure sensor (32) away from the mounting plate (31) being fixedly connected to a side of a first pressure plate; An end expansion anchor mechanism, the end expansion anchor mechanism comprising an anchor tube body (41) deeply nailed into the interior of a tunnel foundation pit slope, one end of the anchor tube body (41) being provided with a force-bearing head (42), and the surface of the anchor tube body (41) being provided with an expansion sheet (43).

2. A tunnel foundation pit slope geological pressure support device according to claim 1, characterized in that: The combined pressure main beam further comprises a first guide tube (14), the inner wall of the first guide tube (14) overlaps the surface of the anchor tube body (41), and one side of the beam body (11) is fixedly connected to one side of the first pressure plate.

3. A tunnel foundation pit slope geological pressure support device according to claim 1, characterized in that: The pressure support mechanism further comprises a limit block (26), the interior of the limit block (26) being threadedly connected to one end of the guide rod (25), and the other end of the guide rod (25) being fixedly connected to a second pressure plate (27).

4. A tunnel foundation pit slope geological pressure support device according to claim 3, characterized in that: The structure of the second pressure plate (27) is the same as that of the first pressure plate, and the side of the second pressure plate (27) away from the guide rod (25) is in contact with the tunnel foundation pit slope.

5. The tunnel foundation pit slope geological pressure support device according to claim 1, characterized in that: The first pressure plate comprises a plate body (21), one side of the plate body (21) is provided with a meshing combination groove (22), and the other side of the plate body (21) is provided with a meshing combination edge (23).

6. A tunnel foundation pit slope geological pressure support device according to claim 1, characterized in that: The pressurizing mechanism further comprises an inflation tube (34), one end of the inflation tube (34) being connected to the inflation port of the airbag (33), and a one-way valve (36) being arranged inside the inflation tube (34).

7. A tunnel foundation pit slope geological pressure support device according to claim 6, characterized in that: An air pump (35) is provided at one end of the inflation tube (34) away from the air bag (33), and the air pump (35) is connected to the pressure sensor (32) for signal transmission.

8. The tunnel foundation pit slope geological pressure support device according to claim 7, characterized in that: A pressure plate (37) is fixedly connected to a side of the air bag (33) away from the mounting plate (31), and one side of the pressure plate (37) overlaps a side of the second pressure plate (27) close to the guide rod (25).

9. The tunnel foundation pit slope geological pressure support device according to claim 1, characterized in that: The end expansion anchor mechanism further comprises an expansion block (44), wherein the expansion block (44) is arranged on the inner wall of the expansion sheet (43), and an ejector rod (45) is inserted into the interior of the anchor tube body (41).

10. A tunnel foundation pit slope geological pressure support device according to claim 9, characterized in that: One end of the ejector rod (45) is fixedly connected to an insertion rod (46); one end of the ejector rod (45) close to the expansion block (44) is configured as a round head; and one side of the expansion block (44) close to the ejector rod (45) is configured as a slope.

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