Movable secondary grouting rack in tunnel

Abstract

The utility model discloses a movable secondary grouting rack in a tunnel. The movable secondary grouting rack comprises a stirring tank, a control electric box, a grouting machine and a grouting pipeline which are arranged on a rack main body structure, the main body structure of the rack is a steel truss structure provided with two layers of construction platforms, and comprises four supporting legs, cross connection oblique beams connected between the supporting legs in a welded mode, two platform bottom faces, horizontally-arranged longitudinal and transverse beams connected with the supporting legs in a welded mode and movable idler wheels arranged at the bottoms of the four supporting legs, and the two platforms are respectively an upper steel frame platform and a lower steel frame platform which are horizontally arranged. Each layer of platform is provided with a crawling ladder, and the lower layer of platform is provided with a stirring tank, a control electric box, a grouting machine and a grouting pipeline. The rack is compact in structure, the grouting equipment and the stirring tank can be arranged in order through the upper-layer platform and the lower-layer platform, and the working efficiency is high; the four supporting legs and the rollers enable the rack to move flexibly, stably and reliably; the device is suitable for continuous shield tunneling in a narrow tunnel space, and secondary grouting behind the trolley is carried out under the condition that tunneling is not affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction equipment design, and relates to a construction equipment for secondary grouting in shield construction. Background Technique

[0002] In tunnel engineering, the secondary grouting technology, as a common reinforcement and waterproofing measure, is of great significance for ensuring the stability and service life of the tunnel structure. However, the traditional secondary grouting technology has problems such as inconvenient operation and low efficiency in practical applications, especially in the narrow tunnel space, these problems are more prominent. Therefore, developing a movable secondary grouting device in the tunnel is of great significance for improving tunnel construction efficiency and reducing safety risks. Summary of the Invention

[0003] The purpose of the utility model is to provide a device suitable for secondary grouting behind the trolley during continuous shield tunneling in a narrow tunnel space without affecting the normal tunneling of the tunnel.

[0004] The utility model is realized through the following technical solutions:

[0005] A movable secondary grouting scaffold in the tunnel, characterized in that it includes a mixing tank, a control electric box, a grouting machine and a grouting pipeline arranged on the main structure of the scaffold;

[0006] The main structure of the scaffold is a steel truss structure with two layers of construction platforms, including: four legs, cross-connected inclined beams welded between the legs, horizontal and vertical beams welded and connected to the bottom surfaces of the two platforms and horizontally arranged on the legs, movable rollers are provided at the bottoms of the four legs, the two platforms are steel frame platforms horizontally arranged in the upper and lower layers, ladders are provided on each layer of the platform, and a mixing tank, a control electric box, a grouting machine and a grouting pipeline are installed on the lower platform.

[0007] Further, the four legs are arranged perpendicular to the horizontal plane and parallel to each other; or the four legs are inclined, and each leg forms the same angle with the vertical axis of the center of the grouting scaffold.

[0008] Further, the two layers of construction platforms are both laid with walkway boards; guardrails are provided around, with a height not less than 1 meter; the ladder is arranged on one side of the platform.

[0009] Further, the mixing tank is connected to the control electric box through a cable to realize remote start, stop and mixing speed adjustment; the grouting machine is connected to the control electric box through a cable to realize grouting start, stop and pressure adjustment; one end of the grouting pipeline is connected to the discharge port of the mixing tank, and the other end is connected to the feed port of the grouting machine.

[0010] The movable secondary grouting scaffold in the tunnel of the utility model can ensure the stability and safety of the tunnel structure during shield construction. Especially during continuous tunneling, secondary grouting can be carried out without affecting the normal tunneling of the tunnel, making up for possible deficiencies in the synchronous grouting process or meeting the requirements under specific geological conditions.

[0011] The grouting scaffold of the utility model has the ability of real-time grouting: during the continuous tunneling of the shield machine, the secondary grouting device needs to have the ability of real-time grouting, that is, it can grout and fill the gap between the tunnel segment and the formation in time without affecting the normal operation of the shield machine.

[0012] The grouting scaffold of the utility model has the control of grouting pressure and grouting volume: in order to ensure the grouting effect, it is necessary to accurately control the grouting pressure and grouting volume. Insufficient grouting pressure may cause the grouting material not to fully penetrate into the gap to be filled, while too high grouting pressure may damage the tunnel segment. The control of grouting volume is also crucial. Too much or too little grouting volume may affect the stability and safety of the tunnel structure.

[0013] The grouting scaffold of the utility model has the adaptability to grouting materials: due to the complexity and variability of geological conditions, the secondary grouting device needs to be able to adapt to different types and properties of grouting materials.

[0014] The grouting scaffold of the utility model has the reliability of grouting pipelines and grouting equipment: during secondary grouting construction, the grouting pipelines and grouting equipment need to withstand high pressure and high flow working conditions, so their reliability must be ensured. Once a pipeline or equipment fails, it may cause the grouting operation to be interrupted, affecting the progress and quality of tunnel tunneling.

[0015] The scaffold of the utility model has the following advantages: the main structure of the scaffold of the utility model adopts the design of two-layer construction platforms, four legs and rollers, making the whole equipment structure compact and convenient for moving and operating in the narrow tunnel space. The two-layer construction platforms provide operation space for the staff and ensure the stability of the equipment at the same time. The design of the upper and lower platforms enables the orderly layout of grouting equipment, mixing tanks, etc., improving work efficiency. The four legs and roller legs ensure the stability of the scaffold, and the rollers enable the scaffold to move flexibly in the tunnel, facilitating rapid transfer between multiple working points. The scaffold structure of the utility model can flexibly set the length of the legs, the inclination angle and the size of the construction platform according to the specific size of the tunnel to adapt to the working environment of tunnels with different sizes. The scaffold of the utility model has stronger adaptability and flexibility. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the scaffold of the utility model.

[0017] In the figure, 1 is the main structure, 2 is the mixing tank, 3 is the control electric box, 4 is the grouting machine, 5 is the grouting pipeline, 6 is the walkway board, 7 is the guardrail, 8 is the ladder, and 9 is the roller. Specific embodiments

[0018] The following further describes the present utility model in combination with specific embodiments. The specific embodiments are further explanations of the principle of the present utility model and do not limit the present utility model in any way. The same or similar technologies to the present utility model do not exceed the protection scope of the present utility model.

[0019] Combined with the attached drawings.

[0020] The movable secondary grouting bench in the tunnel includes: main structure, mixing tank, control electric box, grouting machine, grouting pipeline, walkway board, guardrail, ladder, and roller.

[0021] The main structure is integrally welded by 16A I-beams and 50 round steel. Before welding the main structure, it is necessary to perform a stress analysis and calculation on the stability of the entire structure to ensure that the calculation requirements are met. Bending strength, shear strength, local bearing pressure, overall stability, and deflection of the top platform; bending strength, shear strength, local bearing pressure, overall stability, and deflection of the bottom cross beam; strength, overall stability, and local stability calculation of the bottom columns.

[0022] After the main structure is welded, walkway boards are laid flat on both the upper and lower layers, and the surrounding is enclosed with guardrails. The walkway board is cut at one of the side legs to facilitate the access of construction workers. Universal wheels are installed at the bottoms of the four legs of the main structure to ensure the movement control of the device. The mixing tank and the grouting machine can be used after being connected to the external circuit through the control electric box using cables for power supply.

[0023] Mixing tank: The mixing tank is one of the core components of the grouting system and is used to mix the materials required for grouting. The mixing tank is made of stainless steel material and has the characteristics of corrosion resistance and easy cleaning. A stirrer is installed inside the mixing tank and rotates driven by a motor to achieve uniform mixing of the grouting materials. The mixing tank is connected to the control electric box through a cable to achieve remote start, stop, and mixing speed adjustment.

[0024] Grouting machine: The grouting machine is responsible for transporting the mixed grouting materials to the target area through the grouting pipeline. The grouting machine adopts high-pressure pumping technology to ensure stable pressure and flow of the grouting materials during transportation. The grouting machine is connected to the control electric box, and parameter settings and remote control are performed through the control electric box to achieve grouting start, stop, and pressure adjustment.

[0025] Grouting pipeline: The grouting pipeline is used to connect the mixing tank and the grouting machine, and transport the grouting material from the mixing tank to the grouting machine. The grouting pipeline is made of high-strength and corrosion-resistant materials to ensure no leakage or blockage during transportation. The layout of the grouting pipeline should be designed according to the actual construction requirements to ensure that the grouting material can be accurately transported to the target area. One end of the grouting pipeline is connected to the discharge port of the mixing tank, and the other end is connected to the feed port of the grouting machine.

[0026] Lay walkway boards on the upper and lower layers of the main structure to facilitate the movement and operation of construction workers. Install guardrails around, with a height of not less than 1 meter, to ensure construction safety. The walkway boards are made of anti-slip materials to ensure the walking safety of construction workers. The ladder is set on one side of the device to facilitate construction workers to get on and off the device.

[0027] The bottom of the bench of the utility model is provided with universal wheels, which can move flexibly in the tunnel to facilitate construction; the main structure has been accurately checked by stress analysis to ensure stability during the grouting process; the mixing tank and the grouting machine adopt efficient designs to ensure the efficient progress of the grouting process; safety facilities such as guardrails, walkway boards and ladders are provided around the platform to ensure the safety of construction workers.

[0028] In shield tunneling construction, secondary grouting is an important link to ensure the stability of the tunnel structure and construction quality. This device is applicable to the construction of most shield tunnels. It has characteristics such as real-time grouting, precise control and high adaptability. It can effectively fill the gap between the segment and the formation without disturbing the normal tunneling of the tunnel, and improve the stability of the overall tunnel structure.

[0029] In practical applications, taking a 6.9-meter shield tunnel project as an example, the formation of this project is complex, and secondary grouting reinforcement is required multiple times after synchronous grouting is completed. The shield construction period of the project is relatively tight. After using this device, it greatly guarantees the requirements for the construction period progress. For example, in the normal situation, tunneling still needs to be stopped, and secondary grouting treatment is carried out separately for the areas that need to be reinforced.

[0030] During the use process, abnormal situations such as blockage of the grouting pipeline and failure of the grouting pump may occur to the bench of the utility model. To solve these problems, it is necessary to regularly clean the grouting pipeline to prevent the residue of the grouting material; strengthen the maintenance of the grouting pump to ensure the normal operation of the equipment.

[0031] The bench of the utility model plays an important role in tunnel construction with its efficient and stable performance and excellent practical application results. It can not only reduce the construction cost, but also improve the work efficiency.

Claims

1. A movable secondary grouting stand in a tunnel, characterized in that: It includes a mixing tank, a control electric box, a grouting machine and a grouting pipeline arranged on the main structure of the platform; The main structure of the platform is a steel truss structure with two-layer construction platforms, including: four legs, cross-connected inclined beams welded between the legs, the bottom surfaces of the two platforms, and horizontally arranged longitudinal and transverse beams welded to each leg, movable rollers are arranged at the bottom of the four legs, and the two platforms are horizontally arranged upper and lower steel frame platforms respectively. Ladders are set on each platform, and the lower platform is installed with a mixing tank, control electrical box, grouting machine and grouting pipeline.

2. The movable secondary grouting stand in the tunnel according to claim 1, characterized in that: The four legs are arranged perpendicular to the horizontal plane and parallel to each other; or the four legs are arranged obliquely, and each leg forms the same angle with the central vertical axis of the grouting stand.

3. The movable secondary grouting stand in the tunnel according to claim 1, characterized in that: The two-layer construction platforms are both paved with walkway boards; guardrails are set up all around with a height of not less than 1 meter; and a ladder is set up on one side of the platform.

4. The movable secondary grouting stand in the tunnel according to claim 1, characterized in that: The mixing tank is connected to the control box via a cable to achieve remote start, stop and mixing speed adjustment; the grouting machine is connected to the control box via a cable to achieve grouting start, stop and pressure adjustment; one end of the grouting pipeline is connected to the discharge port of the mixing tank, and the other end is connected to the feed port of the grouting machine.

Images