Vacuum preloading water-pressing well type vacuumizing equipment and using method thereof

Abstract

The invention relates to vacuum preloading water-pressing well type vacuumizing equipment and a using method thereof. A foundation is covered with a vacuum sealing film, a motor is connected with the driving end of a lever device through an input end rope, the driven end of the lever device is connected with an output end rope, a vertically-downward pit hole is excavated in the ground, and a supporting bracket is placed in the pit hole; a second one-way valve is installed on the top of the water inlet pipe, the top of the water inlet pipe is connected to the bottom of the water pumping pipe in a sealed mode, the other end of the output end rope is connected to a piston, and a first one-way valve is installed on the top of the piston. Vacuum is generated at the bottom of the soil body, so that the vacuum spreads all over all depths, and the overall reinforcing effect is enhanced; well resistance generated by accumulated water in an original drainage plate is overcome, water in the deep soil body is gradually lifted upwards through the first one-way valve and the second one-way valve and is not limited by atmospheric pressure, one low-power-consumption motor can drive multiple sets of equipment through a transmission shaft, operation power consumption is low, and engineering cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of soft soil foundation treatment, and more specifically, to a soft soil foundation treatment device and a use method thereof. Background Art

[0002] In the field of soft soil foundation reinforcement, vacuum preloading technology has been relatively mature after long-term development and is widely used in various engineering practices. Vacuum preloading is achieved by setting up a drainage system in the soft soil foundation and covering it with a sealing film. The vacuum pump is used to pump air to form a negative pressure, so that the pore water in the soil is discharged, thereby improving the strength and stability of the foundation.

[0003] However, the current vacuum preloading technology still has some problems that need to be solved. On the one hand, water accumulation on the drainage board will produce a well resistance effect. During the vacuum preloading process, the drainage board is an important drainage channel. Once water accumulates, it will hinder the smooth discharge of pore water and reduce the reinforcement effect. The well resistance effect not only affects the construction progress, but may also cause the foundation treatment to fail to meet the standards, posing a safety hazard to subsequent projects. On the other hand, the vacuum preloading method consumes a lot of power. In actual construction, the vacuum pump needs to run continuously for a long time, consuming a lot of electricity. This not only increases the cost of the project, but also does not meet the current requirements of energy conservation and environmental protection. With energy becoming increasingly tight today, how to reduce the power consumption of the vacuum preloading method has become an important research topic.

[0004] In summary, although vacuum preloading is an effective soft soil foundation reinforcement technology, the well resistance effect of water accumulation in the drainage board and the high power consumption limit its further application and development. Therefore, it is of great practical significance to develop a new technology that can effectively solve these problems. Summary of the invention

[0005] In order to solve the problems of well resistance effect and high power consumption in the prior art, the present invention provides a vacuum pre-pressure water well type vacuum pumping equipment, including an above-ground device and an underground device, wherein the above-ground device includes a vacuum sealing film covering the foundation, a motor is placed on the vacuum sealing film, the motor is connected to the active end of the lever device through an input end rope, and the passive end of the lever device is connected to the output end rope. A vertical downward pit is excavated on the ground, and the underground device is installed in the pit. The underground device includes a supporting bracket, a filter cloth is installed on the periphery of the supporting bracket, and a water inlet pipe is installed below the inner part of the mounting bracket. There are multiple through holes around the water inlet pipe so that water and gas can enter and exit the water inlet pipe. The bottom of the water inlet pipe is sealed, and a top cover with a second one-way valve is installed on the top of the water inlet pipe. The top of the water inlet pipe is sealed and connected to the bottom of the water pumping pipe. The second one-way valve conducts the water inlet pipe to the water pumping pipe, and the top of the water pumping pipe is exposed to the ground. The other end of the output end rope is connected to the piston, and the top of the piston is equipped with a first one-way valve. The first one-way valve conducts the piston from the bottom to the top. The piston is installed in the water pumping pipe and moves up and down therein.

[0006] A further technical solution of the present invention is: the top cover is a double-head structure, one end is sealed and connected to the water inlet pipe, and the other end is sealed and connected to the water extraction pipe, and a second one-way valve is installed in the middle of the top cover.

[0007] A further technical solution of the present invention is: the above-ground device also includes a water outlet device, which includes a water tank with a water outlet hole and a water inlet hole, the water inlet hole is located at a lower position and connected to the water outlet end of the water pump pipe, and the water outlet hole is located at a higher position and connected to the drain pipe.

[0008] A further technical solution of the present invention is that the water suction pipe and the water inlet pipe are hard PVC pipes.

[0009] A further technical solution of the present invention is: a counterweight is fixed under the piston.

[0010] The present invention also provides a method for using a vacuum pre-pressurized water well type vacuum pumping equipment, comprising the following steps: S1. laying a vacuum sealing film on the ground, and marking reinforcement points on the vacuum sealing film with red paint; S2. using a drilling machine to drill holes at the points marked with red paint to form vertical pits; S3. installing the filter cloth to the periphery of the support bracket, and then placing the support bracket into the pit; S4. placing the assembled water pumping pipe and water inlet pipe into the center of the support bracket, and straightening and fixing them at the mouth of the pit; S5. fixing the lever device near the pit so that the output end rope is vertical, and then connecting the input end rope to the motor, adjusting the length of the output end rope so that the piston moves down to the lowest point, and setting the forward and reverse strokes of the motor and the start time interval; S6. starting the motor power supply and starting to pump water.

[0011] The beneficial effects of the present invention are:

[0012] A vacuum can be directly generated at the bottom of the soil, and the sleeve structure used in the underground structure can be used to spread the vacuum to all depths, thereby enhancing the overall reinforcement effect. The device can overcome the well resistance caused by water accumulation inside the original drainage board. The moisture in the deep soil is gradually lifted upward through the first one-way valve and the second one-way valve, and is not restricted by atmospheric pressure. A low-power motor can drive multiple sets of equipment through the transmission shaft, with low operating power consumption, reducing engineering capital consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] When considered in conjunction with the accompanying drawings, the structure, principle, working characteristics and advantages of the present invention can be well understood with reference to the following description, but the drawings described herein are used to further explain the present invention, and the attached schematic diagrams are only for better explanation of the present invention and do not constitute an improper limitation on the present invention, wherein:

[0014] Figure 1 The present invention is a schematic structural diagram of a vacuum pre-pressure water well type vacuum pumping equipment. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with examples and drawings. It should be noted that the following embodiments are merely illustrative and are not intended to limit the present invention.

[0016] See also Figure 1 A vacuum pre-pressing water well vacuum pumping equipment of the present invention comprises an above-ground device and an underground device, wherein the above-ground device comprises a vacuum sealing film 21 covering the foundation, a motor 2 is placed on the vacuum sealing film 21, the motor 2 is connected to the active end of a lever device 5 via an input end rope 4, the passive end of the lever device 5 is connected to an output end rope 3, the input end rope and the output end rope can be the same rope or can be separated into two ropes, for the case where a higher extraction depth is required, it is preferred to use one rope, on the contrary, using two ropes is a more preferred solution, a vertical downward pit is excavated on the ground, the underground device is installed in the pit, the underground The device includes a supporting bracket 13, a filter cloth 14 is installed on the periphery of the supporting bracket 13, a water inlet pipe 12 is installed at the lower part of the interior of the supporting bracket 13, a plurality of through holes are arranged around the water inlet pipe 12 so that water and gas can enter and exit the water inlet pipe 12, the bottom of the water inlet pipe 12 is sealed, a top cover with a second one-way valve 16 is installed on the top of the water inlet pipe 12, the top of the water inlet pipe is sealed and connected to a water pumping pipe 11, the water pumping pipe is exposed to the ground, the other end of the output end rope is connected to a piston, a first one-way valve 15 is installed on the top of the piston, the first one-way valve conducts the piston from the bottom to the top, the piston is installed in the water pumping pipe and moves up and down therein.

[0017] The underground device structure adopts a sleeve structure, which has a hard pipe inside. The upper hard pipe is a pumping pipe and the lower hard pipe is a water inlet pipe, which serves as a passage for conveying water. A second one-way valve 16 is fixedly installed on the top of the water inlet pipe below the bottom of the pumping pipe. A movable first one-way valve 15 is installed in the water inlet pipe. The rope 3 can drive the first one-way valve 15 to reciprocate up and down through the power provided by the motor 2. In the rising stage, the first one-way valve 15 is closed, so that vacuum suction is generated between the first one-way valve and the second one-way valve, so that the water at the water inlet pipe is sucked into the pumping pipe between the first one-way valve and the second one-way valve through the second one-way valve 16; when the input end rope drives the output end rope to relax, the first one-way valve 15 is opened during the process of the piston descending to the bottom, and the water pressure between the first one-way valve and the second one-way valve is pushed into the pumping pipe above the piston. The reciprocating up and down movement can gradually and continuously pump water from the water inlet pipe to the top of the pumping pipe. The outflowing water can cover the vacuum sealing film to play the role of water carrier, or it can be collected and discharged according to the specific conditions of the project.

[0018] The water infiltrated by the soil and the water extracted by vacuum suction will pass through the filter cloth 14, gather at the lower part of the structure, and then flow into the pipe through the through-holes of the water inlet pipe.

[0019] The top cover is a double-head structure, one end of which is sealed and connected to the water inlet pipe, and the other end of which is sealed and connected to the water extraction pipe. A second one-way valve is installed in the middle of the top cover, and the second one-way valve conducts one-way from the water inlet pipe to the water extraction pipe. This structure is easy to assemble and forms a one-way sealed channel.

[0020] The above-ground device also includes a water outlet device 1, which includes a water tank with a water outlet hole 11 and a water inlet hole. The water inlet hole is located at a lower position and connected to the water outlet end of the water pumping pipe, and the water outlet hole is located at a higher position and connected to the drain pipe to drain the water. This is for the case of too much water. If there is less water, it can be directly discharged to the vacuum sealing membrane to play a water load pressure role and finally evaporate.

[0021] The water suction pipe and the water inlet pipe are hard pipes, preferably hard PVC pipes, which are easy to manufacture and transport and have low cost.

[0022] A counterweight is fixed under the piston, and there is friction between the piston and the water pumping pipe. The weight of the counterweight can accelerate the downward movement of the piston. When there is no counterweight, the maximum weight will gradually be reached as the water above the piston increases. If you want to accelerate the downward movement speed of the piston, you can choose to increase the counterweight appropriately.

[0023] More specifically, the present invention provides a method for using a vacuum pre-pressurized water well type vacuum pumping equipment, comprising the following steps: S1. Laying a vacuum sealing film on the ground, and marking reinforcement points on the vacuum sealing film with red paint; S2. Using a drilling machine to drill holes at the points marked with red paint to form vertical pits; S3. Installing the filter cloth to the periphery of the support bracket, and then placing the support bracket into the pit; S4. Putting the assembled water pumping pipe and water inlet pipe into the center of the support bracket, and straightening and fixing them at the mouth of the pit; S5. Fixing the lever device near the pit so that the output end rope is vertical, and then connecting the input end rope to the motor, adjusting the length of the output end rope so that the piston moves down to the lowest point, and setting the forward and reverse strokes of the motor and the start time interval; S6. Starting the power supply of the motor and starting water pumping.

[0024] Although the present invention has been described in detail in conjunction with the embodiments, those skilled in the art should understand that the present invention is not limited to specific embodiments. On the contrary, various modifications, variations and substitutions that do not exceed the spirit and substance of the present application fall within the scope of protection of the present application.

Claims

1. A vacuum pre-pressure water well type vacuum pumping equipment, characterized in that: It includes an above-ground device and an underground device. The above-ground device includes a vacuum sealing film covering the foundation. The motor is placed on the vacuum sealing film. The motor is connected to the active end of the lever device through an input end rope. The passive end of the lever device is connected to the output end rope. A vertical downward pit is excavated on the ground. The underground device is installed in the pit. The underground device includes a supporting bracket. A filter cloth is installed on the periphery of the supporting bracket. An inlet pipe is installed below the inner part of the mounting bracket. There are multiple through holes around the inlet pipe so that water and gas can enter and exit the inlet pipe. The bottom of the inlet pipe is sealed. A top cover with a second one-way valve is installed on the top of the inlet pipe. The top of the inlet pipe is sealed and connected to the bottom of the pumping pipe. The second one-way valve conducts the inlet pipe to the pumping pipe. The top of the pumping pipe is exposed to the ground. The other end of the output end rope is connected to the piston. The top of the piston is equipped with a first one-way valve. The first one-way valve conducts the piston from the bottom to the top. The piston is installed in the pumping pipe and moves up and down therein.

2. The vacuum preloading water well type vacuum pumping equipment according to claim 1, characterized in that: The top cover is a double-head structure, one end is sealed and connected to the water inlet pipe, and the other end is sealed and connected to the water extraction pipe. A second one-way valve is installed in the middle of the top cover.

3. The vacuum preloading water well type vacuum pumping equipment according to claim 1, characterized in that: The above-ground device also includes a water outlet device, which includes a water tank with a water outlet hole and a water inlet hole. The water inlet hole is located at a lower position and connected to the water outlet end of the water pumping pipe, and the water outlet hole is located at a higher position and connected to the drain pipe.

4. The vacuum preloading water well type vacuum pumping equipment according to claim 1, characterized in that: The water pumping pipe and the water inlet pipe are hard PVC pipes.

5. A vacuum pre-pressure water well type vacuum pumping equipment according to any one of claims 1 to 3, characterized in that: A counterweight is fixed below the piston.

6. A method for using a vacuum pre-pressure water well type vacuum pumping equipment, characterized in that The steps include: S1. Lay a vacuum sealing film on the ground and mark the reinforcement points on the vacuum sealing film with red paint; S2. Use a drilling machine to drill holes at the red paint marked points to form vertical holes; S3. Install the filter cloth to the periphery of the support bracket, and then place the support bracket into the pit; S4. Place the assembled water extraction pipe and water inlet pipe into the center of the support bracket and fix them at the pit mouth; S5. Fix the lever device near the pit so that the output end rope is vertical, then connect the input end rope to the motor, adjust the length of the output end rope so that the piston moves down to the lowest point, and set the motor forward and reverse stroke and start time interval; S6. Start the motor power supply and start pumping water.

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