Subway foundation pit reinforcing device

Abstract

The utility model discloses a subway foundation pit reinforcing device which comprises a supporting base, fixing plates for supporting a foundation pit are fixedly connected to the two sides of the supporting base, a reinforcing support is fixedly connected between the two fixing plates, a self-drilling type anchor rod is connected to the supporting base in a screwed mode, a grouting cavity is formed in the self-drilling type anchor rod, and a grouting hole is formed in the grouting cavity. The lower portion of the grouting cavity is communicated with a discharging port penetrating through the outer wall of the self-drilling type anchor rod, the self-drilling type anchor rod grouting device further comprises a sliding rail fixedly connected to the fixing plate, an auxiliary equipment mounting frame is arranged on the sliding rail in a sliding mode, and a motor used for driving the anchor rod penetrates through the auxiliary equipment mounting frame. The utility model belongs to the technical field of foundation pit construction, and effectively solves the problems that the supporting effect of a subway foundation pit reinforcing device is easily influenced due to deformation of a foundation pit under complex geological conditions, the structure is inconvenient to mount and dismount, and the dismounting and mounting efficiency is influenced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the pit construction technical field, specifically point to a subway pit reinforcing device. BACKGROUND

[0002] The subway will encounter various geological conditions during construction, especially when encountering soft geological conditions, excavation of the foundation pit is needed for reinforcement treatment to facilitate smooth construction. In the process of subway foundation pit construction, the surrounding soil is supported.

[0003] The common subway pit reinforcing device in the prior art has poor stability under complex geological conditions, such as soft soil, which can easily lead to deformation or collapse of the foundation pit.

[0004] And the construction efficiency is low: lack of auxiliary device in the installation process, and the disassembly process is complicated, which affects the construction efficiency. INVENTION CONTENTS

[0005] The technical problem to be solved by the utility model is that the subway pit reinforcing device is prone to deformation under complex geological conditions, which affects the supporting effect, and the installation and disassembly of the structure are relatively inconvenient, affecting the disassembly efficiency.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] The utility model discloses a subway pit reinforcing device, which comprises a supporting base, the supporting base is fixedly connected with a fixed plate supporting the foundation pit on both sides, two groups of fixed plates are fixedly connected with reinforcing supports between them, a self-drilling anchor rod is screwed on the supporting base, a grouting cavity is formed in the self-drilling anchor rod, a discharge port is communicated with the lower part of the grouting cavity and is arranged through the outer wall of the self-drilling anchor rod, and the utility model also comprises a slide rail fixedly connected with the fixed plate, an auxiliary equipment mounting rack is slidably arranged on the slide rail, and a motor for driving the anchor rod is arranged through the auxiliary equipment mounting rack.

[0008] Further, an assembly base is fixedly connected to the output end of the motor, a U-shaped clamping frame is fixedly connected to the upper part of the self-drilling anchor rod, and a slot is formed in the assembly base and matched with the U-shaped clamping frame.

[0009] Further, a limiting hole is formed in the upper part of the slot, connecting plates are fixedly connected to the two sides of the assembly base, and a limiting rod matched with the limiting hole is movably inserted into the connecting plate.

[0010] Further, a ring-shaped limiting member is fixedly connected to the limiting rod, a reset spring is sleeved on the limiting rod, and the reset spring is located between the ring-shaped limiting member and the connecting plate.

[0011] Further, a drill bit is fixedly connected to the lower end of the self-drilling anchor rod, and the outer diameter of the drill bit is greater than the length of the discharge port.

[0012] Further, the drill bit lower part is provided with a bottom discharge head communicated with the grouting cavity, and the self-drilling anchor rod upper part is provided with an injection hole communicated with the grouting cavity.

[0013] The self-drilling anchor rod supporting method has the advantages that:

[0014] 1. The self-drilling anchor rod supporting method combines drilling and grouting, reinforces the foundation pit soil body, and enhances stability.

[0015] 2. The detachable installation auxiliary structure facilitates installation, simplifies the installation and disassembly process, and shortens the construction time. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the embodiment of the utility model;

[0017] Figure 2 It is a whole structure schematic view of another view of the embodiment of the utility model;

[0018] Figure 3 It is a structure installation schematic view of the auxiliary equipment mounting rack;

[0019] Figure 4 It is a use state reference view of the assembled base frame and U-shaped clamping frame;

[0020] Figure 5 It is a structure schematic view of the self-drilling anchor rod;

[0021] Figure 6 It is a sectional view of the self-drilling anchor rod.

[0022] Wherein, 1, support base; 11, fixed plate; 12, reinforcing support; 2, self-drilling anchor rod; 21, grouting cavity; 22, discharge port; 3, slide rail; 31, auxiliary equipment mounting rack; 32, motor; 4, assembled base frame; 41, U-shaped clamping frame; 42, slot; 5, limiting hole; 51, connecting plate; 52, limiting rod; 6, annular limiting component; 61, reset spring; 7, drill bit; 71, bottom discharge head; 72, injection hole. DETAILED DESCRIPTION

[0023] Embodiment one:

[0024] As Figure 1 , Figure 2 , Figure 3 and Figure 6The utility model provides a subway foundation pit reinforcing device, including support base 1, the fixed plate 11 of support base 1 both sides is fixed with the support foundation pit, two groups fixed plate 11 between fixed anchor bracket 12 of reinforcing, the self drilling type anchor rod 2 of screwing has on support base 1, the grouting cavity 21 of being provided with in self drilling type anchor rod 2, grouting cavity 21 lower part is connected with the outlet 22 of being set through the outer wall of self drilling type anchor rod 2, in use, by the rotation of self drilling type anchor rod 2 on support base 1, self drilling type anchor rod 2 lower end drills into the deep place of soil layer, and grouting cavity 21 injects slurry and discharges from outlet 22, and after solidification, the stability of self drilling type anchor rod 2 and soil layer is improved, still including the slide rail 3 of being fixed on fixed plate 11, the auxiliary equipment mounting bracket 31 of being provided with on slide rail 3, the motor 32 of being used for anchor rod drive is passed through on auxiliary equipment mounting bracket 31, in the process of driving self drilling type anchor rod 2 to move down, auxiliary equipment mounting bracket 31 slide under slide rail 3, and it is convenient to install and use and disassembly.

[0025] As Figure 3 , 4 As shown, the output end of motor 32 is fixed with assembly base 4, the upper portion of self drilling type anchor rod 2 is fixed with U-shaped clamping frame 41, and the insertion slot 42 matched with U-shaped clamping frame 41 is formed in assembly base 4; the limiting hole 5 is formed in the upper portion of insertion slot 42, the connecting plate 51 is fixed on the both sides of assembly base 4, and the limiting rod 52 matched with limiting hole 5 is movably inserted into the connecting plate 51.

[0026] After U-shaped clamping frame 41 is inserted into insertion slot 42, the limiting rod 52 is penetrated through limiting hole 5 to realize limiting and fixing, so that the stability of motor 32 driving self drilling type anchor rod 2 is improved.

[0027] Embodiment two:

[0028] As Figure 4 As shown, the limiting rod 52 is fixed with annular limiting member 6, the reset spring 61 is sleeved on the limiting rod 52, and the reset spring 61 is located between annular limiting member 6 and connecting plate 51; the elastic potential energy of reset spring 61 can be used to inwardly push annular limiting member 6, pull limiting rod 52 to realize adjustment and fixing of the insertion position of limiting hole 5, so that adjustment operation is facilitated; when assembly base 4 is removed, the elastic potential energy of reset spring 61 needs to be overcome, and limiting rod 52 is pulled outwardly, so that the fixing of U-shaped clamping frame 41 in the vertical direction is released, and rapid separation and disassembly are facilitated.

[0029] As Figure 5 , 6As shown, the lower end of the self-drilling anchor rod 2 is fixed with a drill bit 7, the outer diameter of the drill bit 7 is greater than the length of the discharge port 22, so that the drill hole diameter can move the discharge port 22 downward, reduce the effect of resistance, and secondly, reserve the space for grouting in the soil layer, improve the stability after solidification; the lower part of the drill bit 7 is provided with a bottom discharge head 71 communicated with the grouting cavity 21, the point of grouting discharge is increased at the lower part, and the upper part of the self-drilling anchor rod 2 is provided with a filling hole 72 communicated with the grouting cavity 21, grouting is carried out from the filling hole 72 after the auxiliary equipment mounting frame 31 is disassembled.

[0030] The above is the use process of the whole subway foundation pit reinforcing device.

[0031] The above describes the utility model and its implementation, which is not restrictive, and the embodiment shown in the drawings is only one of the embodiments of the utility model, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired, without departing from the creative purpose of the utility model, without creative design, similar structure and embodiments of the technical solution, which should belong to the protection scope of the utility model.

Claims

1. A subway foundation pit reinforcing device, comprising a support base (1), both sides of the support base (1) are fixedly connected with fixed plates (11) supporting the foundation pit, and a reinforcing support (12) is fixedly connected between the two groups of fixed plates (11), characterized in that: The support base (1) is screwed with a self-drilling anchor rod (2), the self-drilling anchor rod (2) is provided with a grouting cavity (21), the lower part of the grouting cavity (21) is communicated with a discharge port (22) penetrating through the outer wall of the self-drilling anchor rod (2), further comprising a slide rail (3) fixed on the fixed plate (11), the slide rail (3) is provided with an auxiliary equipment mounting rack (31) slidingly, the auxiliary equipment mounting rack (31) is penetrated with a motor (32) for anchor rod driving.

2. The subway foundation pit reinforcing device according to claim 1, characterized in that: The output end of the motor (32) is fixed with an assembly base frame (4), the upper part of the self-drilling anchor rod (2) is fixed with a U-shaped clamping frame (41), the assembly base frame (4) is provided with a slot (42) matched with the U-shaped clamping frame (41).

3. The underground excavation reinforcement apparatus according to claim 2, characterized by: The upper part of the slot (42) is provided with a limiting hole (5), the both sides of the assembly base frame (4) are fixed with a connecting plate (51), the connecting plate (51) is movably inserted with a limiting rod (52) matched with the limiting hole (5).

4. The underground excavation reinforcement apparatus according to claim 3, characterized by: The limiting rod (52) is fixed with an annular limiting member (6), the limiting rod (52) is sleeved with a reset spring (61), and the reset spring (61) is located between the annular limiting member (6) and the connecting plate (51).

5. The underground excavation reinforcement apparatus according to claim 1, characterized by: The lower end of the self-drilling anchor rod (2) is fixed with a drill bit (7), and the outer diameter of the drill bit (7) is greater than the length of the discharge port (22).

6. The underground excavation reinforcement apparatus according to claim 5, characterized by: The lower part of the drill bit (7) is provided with a bottom discharge head (71) communicated with the grouting cavity (21), and the upper part of the self-drilling anchor rod (2) is provided with an injection hole (72) communicated with the grouting cavity (21).

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