Shallow-buried large-section tunnel integrated construction device

Abstract

The utility model provides a shallow-buried large-section tunnel integrated construction device which comprises a water pump and a water tank, a water inlet of the water pump is connected with the water tank, a float-type water level gauge is arranged in the water tank, a water outlet of the water tank is further connected with a mixer, the mixer is connected with the inlet end of a stirrer, and the bottom outlet end of the stirrer is connected with a pressure detection device. The outlet end of the pressure detection device is connected to an inlet of the grouting pipe, and a water injection pipe is installed at a water outlet of the water pump. According to the integrated tunnel construction method, the seepage velocity of underground water can be effectively reduced through the operations of early-stage treatment, grouting and water injection when the shallow-buried large-section tunnel encounters the condition of high-strength seepage underground water during construction, and favorable conditions are created for other subsequent construction operations such as freezing. According to the utility model, the construction efficiency is greatly improved, the operation is easy, the construction cost is reduced, and the underground water head is controlled.

Description

Technical Field

[0001] The utility model belongs to the field of tunnel construction, in particular to an integrated construction device for a shallow-buried large-section tunnel. Background Art

[0002] Groundwater is a common problem in tunnel construction. The outflow or accumulation of groundwater may lead to dangerous situations such as tunnel collapse and diving, and in serious cases, it may endanger the safety of construction workers and the stability of the project. Especially when the freezing method is applied in tunnel construction, high-intensity seepage will also have an adverse effect on the freezing results, thereby affecting the subsequent construction process.

[0003] When encountering unfavorable geological conditions such as loose soil caused by groundwater during tunnel construction, reinforcement methods such as grouting reinforcement, freezing reinforcement, and jet grouting reinforcement are generally adopted. When the groundwater seepage intensity is too high, certain measures must be taken to reduce the seepage speed to provide a good construction environment for the follow-up. The more complicated the preliminary treatment is, the lower the efficiency will be, which will affect the construction process. How to improve construction efficiency and improve the unfavorable conditions of high-intensity seepage is an important issue facing construction units. Building an integrated construction system and striving to solve the problem at one time is one of the effective solutions at present. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an integrated construction device for a shallow buried large-section tunnel, so as to solve the problem in the prior art that the more complicated the pre-processing is, the lower the efficiency is, which affects the construction progress.

[0005] A shallow buried large-section tunnel integrated construction device, characterized in that it includes a water pump and a water tank, the water inlet of the water pump is connected to the water tank, a float-type water level gauge is placed in the water tank, the water outlet of the water tank is also connected to a mixer, the mixer is connected to the inlet end of the agitator, the bottom outlet end of the agitator is connected to a pressure detection device, the outlet end of the pressure detection device is connected to the inlet of a grouting pipe, the water outlet of the water pump is installed with a water injection pipe, and the grouting pipe and the head of the water injection pipe are installed with a detachable drill bit.

[0006] Preferably, the water pump, water tank, drill bit, water head detection device, water injection pipe, base, mixer, agitator, pressure detection device, grouting pipe form a drilling system, a water injection system and a grouting system.

[0007] Preferably, the water injection system comprises a water pump, a water tank and a water head detection device, and the water head detection device is composed of a pressure gauge and a cable.

[0008] Preferably, the water tank body is provided with a water inlet and a drain and is connected to a water pump and a mixer through an inlet pipe and an outlet pipe respectively. A float-type water level gauge is placed inside the water tank body for detecting the water level of the water tank, and a filter is provided at the water inlet of the water tank.

[0009] Preferably, the mixer comprises: a mixing barrel, an interlayer sleeve, a mixer disc, a weighing device, and a stirring device. The mixing barrel is made of stainless steel, the interlayer sleeve surrounds the surface of the mixing barrel, the mixer disc and the stirring device are installed in the center of the mixing barrel, and a weighing device is provided on the outside of the mixing barrel.

[0010] Preferably, the agitator includes a motor, a reducer, a main shaft, a disc rotor, vanes, and a bracket.

[0011] Preferably, the pressure detection device includes a measuring element, an indicator, and a pressure controller.

[0012] A shallow buried large cross-section tunnel integrated construction device, the construction method comprising the following steps:

[0013] Step 1: Mark the locations of water injection holes and grouting holes around the low head section;

[0014] Step 2: Drill the grouting holes to the designed depth;

[0015] Step 3: After the hole cleaning operation is completed, direct grouting is performed using the drill pipe;

[0016] Step 4: Wait for a certain period of time to ensure that the grouting material is fully solidified and stable according to the stability of the formation and geological conditions;

[0017] Step 5: Drill the water injection holes to the designed depth;

[0018] Step 6: After the hole cleaning operation is completed, use a water pump to inject water to make the formation water level reach the designed height.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model can effectively reduce the seepage velocity of groundwater by grouting and water injection operations in the early stage of shallow buried large-section tunnel construction through the above-mentioned integrated tunnel construction device, and create favorable conditions for subsequent freezing and other construction operations. The utility model greatly improves the construction efficiency, is easy to operate, reduces the construction cost, and realizes the control of groundwater head. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the integrated system structure of the utility model;

[0022] Figure 2This is a schematic diagram of drilling holes for tunnel construction of the utility model;

[0023] Figure 3 This is the integrated construction flow chart of the utility model.

[0024] In the figure:

[0025] 1. Water pump; 2. Water tank; 3. Float-type water level gauge; 4. Mixer; 5. Weighing device; 6. Agitator; 7. Pressure detection device; 8. Grouting pipe; 9. Water injection pipe; 10. Base; 11. Drill bit. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0027] Embodiment 1: Figure 1-Figure 2 As shown, the utility model provides an integrated construction device for a shallow buried large-section tunnel, comprising a water pump 1 and a water tank 2, the water inlet of the water pump 1 is connected to the water tank 2, a float-type water level gauge 3 is placed in the water tank 2, the water outlet of the water tank 2 is also connected to a mixer 4, the mixer 4 is connected to the inlet end of an agitator 6, the bottom outlet end of the agitator 6 is connected to a pressure detection device 7, the outlet end of the pressure detection device 7 is connected to the inlet of a grouting pipe 8, the water outlet of the water pump 1 is installed with a water injection pipe 9, and a detachable drill bit 11 is installed at the head of the grouting pipe 8 and the water injection pipe 9.

[0028] The water pump 1, the water tank 2, the drill bit 11, the water head detection device, the water injection pipe 9, the base 10, the mixer 4, the agitator 6, the pressure detection device 7, and the grouting pipe 8 form a drilling system, a water injection system and a grouting system.

[0029] The water injection system includes a water pump 1, a water tank 2 and a water head detection device. The water head detection device is composed of a pressure gauge and a cable. The water head detection device is used to monitor the groundwater head in the tunnel section in real time.

[0030] A water inlet and a water outlet are provided on the water tank 2 and are connected to the water pump 1 and the mixer 4 through the water inlet pipe and the water outlet pipe respectively to provide water for injection and grouting. A float-type water level gauge 3 is placed inside the water tank 2 to detect the water level of the water tank 2. A filter is provided at the water inlet of the water tank 2. The filter is used to filter impurities and abnormal particles in the water to ensure clean water quality and normal operation of the grouting equipment, thereby ensuring the grouting effect.

[0031] The mixer 4 includes: a mixing barrel, an interlayer sleeve, a mixer disc, a weighing device 5, and a stirring device. The mixing barrel is made of stainless steel, the interlayer sleeve surrounds the surface of the mixing barrel, and a cooling liquid is injected into the interior to control the temperature of the mixture and prevent the mixed liquid from overheating; the mixer disc and the stirring device are installed in the center of the mixing barrel, and are made of stainless steel to assist in stirring; a weighing device 5 is arranged on the outside of the mixing barrel, and the weighing system adds different materials into the mixing barrel according to the ratio, and the stirring device is used to stir the mixture to ensure that the mixture is uniform enough.

[0032] The agitator 6 includes a motor, a reducer, a main shaft, a disc rotor, wings, and a bracket. The motor mainly provides a power source for the agitator 6 component; the reducer mainly converts the high-speed rotation of the motor into the low-speed rotation required by the agitator 6, reducing the load on the motor and extending the service life of the motor; the main shaft is used to connect the motor and the agitator 6; the disc rotor is fixed to the main shaft of the agitator 6, and when rotating, the solid and liquid are mixed evenly to form a mixture with a constant density. The wings are fixed to the disc rotor to increase the stirring speed and mixing intensity of the mixture to ensure that the mixture is uniform; the bracket is used to carry the motor and the agitator 6 component.

[0033] The pressure detection device 7 includes a measuring element, an indicator, and a pressure controller; the pressure controller is used to adjust and control the grouting system to achieve more accurate, stable, and automated pressure control. The pressure controller used in the utility model is a safety valve that can automatically open when the pressure is too high to release excess pressure in the pipeline and container.

[0034] Embodiment 2: Figure 3 As shown, a shallow buried large-section tunnel integrated construction device is implemented by the following construction method:

[0035] Step 1: As attached Figure 2 As shown in the figure, the positions of the grouting holes and water injection holes are determined around the low head section and marked;

[0036] Step 2: Connect the drill bit 11 to the grouting pipe 8 and drill the grouting hole to the designed depth according to the pre-marked position;

[0037] Step 3: Perform hole cleaning operation, prepare slurry according to the proportion, and turn on the mixer 4 and the stirrer 6. Remove the drill bit 11 connected to the lower end of the grouting pipe 8, use the grouting pipe 8 to directly grout, and turn off the mixer 4 and the stirrer 6 after the grouting is completed;

[0038] Step 4: Wait for a certain period of time to ensure that the grouting material is fully solidified and stable according to the stability of the formation and geological conditions;

[0039] Step 5: Connect the drill bit 11 to the water injection pipe 9 and drill the water injection hole to the designed depth according to the pre-marked position;

[0040] Step 6: After the hole cleaning operation is completed, remove the drill bit 11 connected to the water injection pipe 9, start the water pump 1 to perform water injection operations, pay attention to observe the water head value of the water head detection device, make the formation water level reach the designed height, and control the groundwater seepage rate within the designed smaller value.

[0041] The implementation modes of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A shallow buried large cross-section tunnel integrated construction device, characterized in that: The invention comprises a water pump (1) and a water tank (2), wherein the water inlet of the water pump (1) is connected to the water tank (2), a float-type water level gauge (3) is placed in the water tank (2), the water outlet of the water tank (2) is also connected to a mixer (4), the mixer (4) is connected to the inlet end of an agitator (6), the bottom outlet end of the agitator (6) is connected to a pressure detection device (7), the outlet end of the pressure detection device (7) is connected to the inlet of a grouting pipe (8), the water outlet of the water pump (1) is installed with a water injection pipe (9), and the heads of the grouting pipe (8) and the water injection pipe (9) are installed with a detachable drill bit (11).

2. The shallow buried large cross-section tunnel integrated construction device as claimed in claim 1, characterized in that: The water pump (1), water tank (2), drill bit (11), water head detection device, water injection pipe (9), base (10), mixer (4), agitator (6), pressure detection device (7), and grouting pipe (8) form a drilling system, a water injection system, and a grouting system.

3. The integrated shallow buried large-section tunnel construction device as claimed in claim 2, characterized in that: The water injection system comprises a water pump (1), a water tank (2) and a water head detection device, wherein the water head detection device is composed of a pressure gauge and a cable.

4. The integrated shallow-buried large-section tunnel construction device according to claim 1, characterized in that: The water tank (2) is provided with a water inlet and a water outlet and is connected to the water pump (1) and the mixer (4) via a water inlet pipe and a water outlet pipe, respectively. A float-type water level gauge (3) is placed inside the water tank (2) for detecting the water level of the water tank (2). A filter is provided at the water inlet of the water tank (2).

5. The integrated shallow buried large-section tunnel construction device according to claim 1, characterized in that: The mixer (4) comprises: a mixing barrel, an interlayer sleeve, a mixer disc, a weighing device (5), and a stirring device. The mixing barrel is made of stainless steel, the interlayer sleeve surrounds the surface of the mixing barrel, the mixer disc and the stirring device are installed in the center of the mixing barrel, and the weighing device (5) is arranged on the outside of the mixing barrel.

6. The integrated shallow buried large-section tunnel construction device according to claim 1, characterized in that: The stirrer (6) comprises a motor, a reducer, a main shaft, a disc rotor, wings and a bracket.

7. The integrated shallow-buried large-section tunnel construction device according to claim 1, characterized in that: The pressure detection device (7) comprises a measuring element, an indicator and a pressure controller.

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