Positive and negative pressure alternating vacuum preloading foundation treatment device and treatment system

Abstract

The utility model discloses a positive and negative pressure alternating vacuum preloading foundation treatment device and treatment system. The treatment device comprises a group of movable pump trucks which are connected in sequence; the movable pump truck comprises a frame and wheels arranged at the bottom of the frame; positive pressure pumps and negative pressure pumps are installed on the frame, and the negative pressure pumps and the positive pressure pumps are arranged in a staggered mode in the length direction of a construction area. The positive pressure pump and the negative pressure pump are electrically connected with a socket box on the frame respectively; a plug is further correspondingly arranged on the frame, a power line of the plug is led out from the socket box, and two adjacent movable pump trucks are connected in parallel through matching of the plug and the socket box. When in use, the positive pressure pump and the negative pressure pump are respectively connected with corresponding reserved interfaces in a construction area through vacuum pipelines. According to the foundation treatment device, the working positions of the positive pressure pump and the negative pressure pump can be flexibly adjusted according to the foundation treatment progress and actual requirements, the adaptability to different construction stages and site conditions is high, and the maintenance and operation cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of soft soil foundation treatment, in particular to a vacuum preloading foundation treatment device and a treatment system with alternating positive and negative pressures. Background Art

[0002] In modern civil engineering, efficient foundation treatment technology is the key to ensuring the stability of engineering structures. Among them, vacuum preloading technology is widely used in soft soil foundation treatment; it promotes rapid drainage of water and accelerates soil consolidation by creating negative pressure in the soil, thereby improving the engineering properties of the soil. The traditional vacuum preloading treatment method arranges a drainage system (such as drainage boards and drainage pipes) in the area to be treated, and lays a horizontal sand cushion layer on the soft soil foundation, and then uses a vacuum pump to extract water and air from the soil pores to achieve preloading consolidation.

[0003] The vacuum preloading foundation treatment system in the prior art has the following defects and deficiencies: ① The problem of pipe and filter blockage: During the vacuum preloading process, the pipes and filters in the drainage system are easily blocked by fine particles in the soil (such as silt and clay); once blocked, it will seriously affect the drainage efficiency of the system, resulting in a decrease in the vacuum degree, thereby affecting the effect of the entire foundation treatment. ② Limitation of the position of the vacuum pump: In the existing treatment system, the position of the positive pressure pump and the negative pressure pump is usually fixed during the entire construction process, which limits the system's adaptability to different construction stages and site conditions, and cannot be effectively adjusted according to actual ground settlement or water discharge. Utility Model Content

[0004] The present application provides a vacuum preloading foundation treatment device with alternating positive and negative pressures to overcome the above-mentioned problems existing in the prior art. The vacuum preloading foundation treatment device with alternating positive and negative pressures of the present application sets the positive and negative pressure pumps on a mobile pump truck so that they can be moved within the construction area, so that the working positions of the positive and negative pressure pumps can be flexibly adjusted according to the progress of the foundation treatment and actual needs, and has high adaptability to different construction stages and site conditions, and can also adjust the treatment strategy in time to deal with possible drainage system blockage problems, reducing maintenance and operating costs; in addition, the foundation treatment device of the present application includes a group of mobile pump trucks connected in sequence, each mobile pump truck is respectively provided with a positive pressure pump and a negative pressure pump, which can evenly apply positive and negative pressures during use, and the foundation treatment effect is good, and the two adjacent mobile pump trucks are electrically connected through a plug and socket structure, with good integrity and high convenience of use. Correspondingly, the present application also provides a vacuum preloading foundation treatment system with alternating positive and negative pressures equipped with the above-mentioned foundation treatment device.

[0005] For the processing device, the technical solution of this application is:

[0006] A vacuum preloading foundation treatment device with alternating positive and negative pressures comprises a group of mobile pump trucks connected in sequence; the mobile pump truck comprises a frame and wheels arranged at the bottom of the frame; a positive pressure pump and a negative pressure pump are installed on the frame, and the negative pressure pump and the positive pressure pump are arranged alternately along the length direction of the construction area; the positive pressure pump and the negative pressure pump are electrically connected to the socket box on the frame respectively; a plug is also provided on the frame, and a power cord of the plug is led out from the socket box, and two adjacent mobile pump trucks are connected in parallel through the cooperation of the plug and the socket box; when in use, the positive pressure pump and the negative pressure pump are connected to the corresponding reserved interfaces in the construction area respectively through vacuum pipes.

[0007] Compared with the prior art, the vacuum preloading foundation treatment device with alternating positive and negative pressures of the present application installs positive and negative pressure pumps on mobile pump trucks, so that they can be flexibly moved in the construction area, so as to respond immediately to the actually observed ground subsidence and moisture discharge, that is, the working positions of the positive and negative pressure pumps can be flexibly adjusted according to the progress of foundation treatment and actual needs, and it has high adaptability to different construction stages and site conditions; and it can also adjust the treatment strategy in time to deal with possible drainage system blockage problems and reduce maintenance and operating costs; in addition, the foundation treatment device of the present application includes a group of mobile pump trucks connected in sequence, each mobile pump truck is respectively provided with a positive pressure pump and a negative pressure pump, which can evenly apply positive and negative pressures during use, and the foundation treatment effect is good, and the two adjacent mobile pump trucks are electrically connected through a plug and socket structure, with good integrity and high convenience of use.

[0008] As an optimization, in the aforementioned positive and negative pressure alternating vacuum preloading foundation treatment device, a socket matching with a plug is provided on the frame. Thus, when in use, the plug on the last mobile pump truck can be inserted into the socket, thereby improving the safety of use; or, when not in use, the plug on the mobile pump truck can be inserted into the socket for storage.

[0009] As an optimization, in the aforementioned positive and negative pressure alternating vacuum preloading foundation treatment device, a cable trough is provided on the frame for installing the power cord of the plug. The cable trough serves to store the power cord of the plug, making the frame neat and beautiful, and can also prevent the power cord from getting tangled, reducing the wear of the power cord.

[0010] As an optimization, in the aforementioned positive and negative pressure alternating vacuum preloading foundation treatment device, a connection hole is respectively opened at both ends of the frame; two adjacent mobile pump trucks are connected by the cooperation of the connection rope and the connection hole. The connection of the two adjacent mobile pump trucks is achieved by the cooperation of the connection rope and the connection hole, which is convenient for disassembly and assembly, easy to implement, and has good integrity and high firmness.

[0011] As an optimization, in the aforementioned positive and negative pressure alternating vacuum preloading foundation treatment device, two receiving grooves are provided on the frame at intervals; a support is provided in the receiving groove; and the positive pressure pump and the negative pressure pump are fixed in the support. At this time, the positive and negative pressure pumps are fixed on the frame through the above structure, which is simple to operate and easy to implement.

[0012] Furthermore, the support is formed in one piece with stainless steel and is in the shape of a hollow cylinder with two ends open. In this case, the structure is simple and the manufacturing is convenient. Furthermore, the two sides of the support are respectively fixed to the two sides of the inner wall of the receiving groove by threaded connection.

[0013] Furthermore, a reserved hole for the vacuum pipe to pass through is provided on the bottom of the receiving groove, and the reserved hole serves as a limit for the vacuum pipe to prevent the vacuum pipe from shaking during the vacuuming process, thereby affecting the vacuuming work.

[0014] As an optimization, in the aforementioned positive and negative pressure alternating vacuum preloading foundation treatment device, a dust cover can be provided on the socket box, thereby preventing external dust from entering the socket box from the socket hole on the socket box and affecting its service life.

[0015] For the processing system, the technical solution of this application is:

[0016] A vacuum preloading foundation treatment system with alternating positive and negative pressures comprises a drainage system arranged in a construction area; the drainage system comprises a drainage board, a drainage pipe, a sand cushion layer laid on a soft soil foundation, and a vacuum membrane laid on the surface of the sand cushion layer; a pump truck track is installed above the vacuum membrane; a group of foundation treatment devices evenly spaced are arranged on the pump truck track; the foundation treatment device is the aforementioned vacuum preloading foundation treatment device with alternating positive and negative pressures of the present application.

[0017] Compared with the prior art, the vacuum preloading foundation treatment system with alternating positive and negative pressures of the present application establishes a pump truck track in the construction area and sets a group of foundation treatment devices evenly spaced on the pump truck track. The foundation treatment device includes a group of mobile pump trucks connected in sequence, and each mobile pump truck is respectively provided with a positive pressure pump and a negative pressure pump. The construction flexibility and adaptability are high, and positive and negative pressures can be evenly applied during use to ensure uniform soil consolidation in the entire construction area, avoid uneven foundation settlement problems caused by insufficient local treatment, and have good foundation treatment effects. In addition, by changing the drainage path in the construction area, the drainage system can be effectively managed and prevented from being blocked, reducing the maintenance requirements of the entire treatment system, and reducing energy consumption increased due to inefficient operation of the treatment system, thereby reducing maintenance and operating costs.

[0018] As an optimization, in the aforementioned positive and negative pressure alternating vacuum preloading foundation treatment system, the wheels of the mobile pump truck in the foundation treatment device include two wheel bodies arranged in parallel, and the wheel bodies are fixed to the frame through a T-shaped connecting rod; the pump truck track is composed of a plurality of stainless steel pipes, and the outer diameter of the stainless steel pipe is the same as the gap between the two wheel bodies. In this way, the moving stability of the mobile pump truck can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the vacuum preloading foundation treatment device with alternating positive and negative pressures of the present application;

[0020] Figure 2 yes Figure 1 The structural diagram of the mobile pump truck when the positive and negative pressure pumps are removed;

[0021] Figure 3 It is a structural schematic diagram of the mobile pump truck in this application;

[0022] Figure 4 It is a schematic diagram of assembling the foundation treatment device of the present application on the track of a pump truck.

[0023] The markings in the attached drawings are: 1-mobile pump truck, 11-frame, 111-socket, 112-wire trough, 113-connecting hole, 114-accommodating groove, 115-reserved hole, 12-wheel, 121-wheel body, 122-T-type connecting rod; 2-positive pressure pump; 3-negative pressure pump; 4-socket box; 5-plug; 6-connecting rope; 7-support. DETAILED DESCRIPTION

[0024] The present application is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present application.

[0025] Example (see Figure 1 to Figure 3 ):

[0026] The vacuum preloading foundation treatment device with alternating positive and negative pressures in this embodiment comprises a group of mobile pump trucks 1 connected in sequence; the mobile pump truck 1 comprises a frame 11 and wheels 12 arranged at the bottom of the frame 11; a positive pressure pump 2 and a negative pressure pump 3 are installed on the frame 11; the positive pressure pump 2 and the negative pressure pump 3 are electrically connected to the socket box 4 on the frame 11 respectively; a plug 5 is also correspondingly provided on the frame 11, and the power cord of the plug 5 is led out from the socket box 4, and two adjacent mobile pump trucks 1 are connected in parallel through the cooperation of the plug 5 and the socket box 4; when in use, the positive pressure pump 2 and the negative pressure pump 3 are respectively connected to the corresponding reserved interfaces in the construction area through vacuum pipes; along the length direction of the construction area, the negative pressure pump 3 and the positive pressure pump 2 are staggered.

[0027] In this embodiment, the socket box 4 is provided with an A socket for inserting the power plugs of the positive-pressure pump 2 and the negative-pressure pump 3 , and a B socket for inserting the plug 5 .

[0028] In this embodiment, the frame 11 is provided with a socket 111 that matches the plug 5. Therefore, when in use, the plug 5 on the last mobile pump truck 1 is conveniently inserted into the socket 111, thereby improving the safety of use (when in use, the foundation treatment device needs to be connected to an external power source, at which time the plug 5 is energized, and the plug 5 on the last mobile pump truck 1 is not connected to the outside, which is dangerous); or, when not in use, the plug 5 on the mobile pump truck 1 can be inserted into the socket 111 for storage.

[0029] In this embodiment, the frame 11 is provided with a cable trough 112 for installing the power cord of the plug 5. The cable trough 112 stores the power cord of the plug 5, making the frame 11 neat and beautiful, and preventing the power cord from getting tangled and reducing the wear of the power cord.

[0030] In this embodiment, a connection hole 113 is respectively provided at both ends of the vehicle frame 11; two adjacent mobile pump trucks 1 are connected by the cooperation of the connection rope 6 and the connection hole 113. The connection of the two adjacent mobile pump trucks 1 is achieved by the cooperation of the connection rope 6 and the connection hole 113, which is convenient for assembly and disassembly, easy to implement, and has good integrity and high firmness.

[0031] In this embodiment, two receiving grooves 114 are provided on the frame 11 at intervals; a support 7 is provided in the receiving groove 114; and the positive pressure pump 2 and the negative pressure pump 3 are fixed in the support 7. At this time, the positive and negative pressure pumps are fixed to the frame through the above structure, which is simple to operate and easy to implement. Furthermore, the support 7 is integrally formed of stainless steel and is in the shape of a hollow cylinder with openings at both ends. The two sides of the support 7 are respectively fixed to the two sides of the inner wall of the receiving groove 114 by threaded connection.

[0032] In this embodiment, a reserved hole 115 for the vacuum pipe to pass through is provided on the bottom of the receiving groove 114. The reserved hole 115 serves to limit the vacuum pipe, thereby preventing the vacuum pipe from shaking during the vacuuming process and affecting the vacuuming work.

[0033] In this embodiment, a dust cover is provided on the socket box 4, so as to prevent external dust from entering the socket box 4 through the socket hole on the socket box 4 and affecting its service life.

[0034] As a specific application of the positive and negative pressure alternating vacuum preloading foundation treatment device of this embodiment:

[0035] A vacuum preloading foundation treatment system with alternating positive and negative pressures comprises a drainage system arranged in a construction area; the drainage system comprises a drainage board, a drainage pipe, a sand cushion layer laid on a soft soil foundation, and a vacuum membrane laid on the surface of the sand cushion layer; a pump truck track is installed above the vacuum membrane; a group of foundation treatment devices evenly spaced are arranged on the pump truck track; the foundation treatment device is the aforementioned vacuum preloading foundation treatment device with alternating positive and negative pressures in the present application.

[0036] Furthermore, in the foundation treatment device, the wheel 12 of the mobile pump truck 1 includes two wheel bodies 121 arranged in parallel, and the wheel body 121 is fixed to the frame 11 through a T-shaped connecting rod 122; the pump truck track is composed of a plurality of stainless steel pipes 8, and the outer diameter of the stainless steel pipe 8 is the same as the gap between the two wheel bodies 121, which is 2 cm. At this time, the mobile pump truck has a high moving stability.

[0037] After the vacuum membrane is laid in the construction area, the pump truck track is installed; according to the horizontal and vertical spacing distribution of the designed positive pressure pump 2 and negative pressure pump 3, heavy objects are used to press and fix the two ends of the pump truck track, and wood can be placed under it to level it according to the horizontal situation of the pump truck track. The width of the pump truck track is equal to the spacing between the two wheels 12 in the width direction of the mobile pump truck 1; the length of the pump truck track is slightly longer than the length of the construction area, and a vehicle section of 1.5 lengths of the mobile pump truck 1 is reserved at both ends to facilitate the disassembly and assembly of the mobile pump trucks 1 at the head and tail during the movement of the foundation treatment device.

[0038] The specific steps of the construction method are as follows:

[0039] (1) Arrange the drainage system according to the design plan in the designated construction area, including drainage boards and drainage pipes, and ensure that each part of the drainage system is properly connected without leakage points; at the same time, reserve interfaces for positive and negative pressure pumps at fixed intervals in the direction parallel to the drainage pipes.

[0040] (2) After the pump truck track is installed in the construction area, multiple vacuum preloading foundation treatment devices with alternating positive and negative pressures of the present application are placed on the pump truck track, and it is ensured that the mobile pump trucks 1 in the construction area are arranged neatly in the horizontal and vertical directions (the positive pressure pump 2 is located at the front end, and the negative pressure pump 3 is located at the rear end), that is, the mobile pump trucks 1 between two adjacent columns and two adjacent rows are aligned one by one (see Figure 4 ).

[0041] (3) When all the mobile pump trucks 1 in the construction area are installed in place, use vacuum pipes to connect the positive pressure pump 2 and the negative pressure pump 3 to the corresponding reserved interfaces in the construction area (the vacuum pipe and the reserved interface can be connected by threads; or the vacuum pipe can be directly put on the reserved interface and then sealed with hydraulic tape), so as to realize the connection between the positive and negative pressure pumps and the site drainage pipe; at the same time, insert the power plugs of the positive pressure pump 2 and the negative pressure pump 3 into the A socket on the socket box 4, and insert the plug 5 on the previous mobile pump truck 1 into the B socket on the socket box 4 of the next mobile pump truck 1.

[0042] (4) Connect the socket box 4 on the first mobile pump truck 1 to an external power source (make the external power source into a plug and insert it into the B socket on the socket box 4), so that the positive pressure pumps 2 and negative pressure pumps 3 on all mobile pump trucks 1 are started at the same time, and the timing begins. At this time, the air pumps in the same column are in the same pressure state.

[0043] (5) According to the timing reminder, disconnect the external power supply after the corresponding time interval, turn off all positive pressure pumps 2 and negative pressure pumps 3, and disconnect the vacuum pipeline from the reserved interface in the construction area; then push all mobile pump trucks 1 forward a distance of half the vehicle length and reconnect the vacuum pipeline to the corresponding reserved interface.

[0044] (6) Repeat steps (4) and (5), and each time the mobile pump truck 1 moves a distance of one vehicle length, disconnect the first mobile pump truck 1 from the following vehicle in the foundation treatment device, and move the mobile pump truck 1 until it is connected to the last mobile pump truck 1.

[0045] (7) When the total moving distance of the foundation treatment device reaches the length of the construction area, the settlement and drainage volume in the area are monitored to determine whether preloading is required; if the expected treatment effect has been achieved, the construction is stopped; if the expected treatment effect has not been achieved, steps (4) to (7) are repeated to continue the construction.

[0046] The above general description of the utility model involved in this application and the description of its specific implementation method should not be understood as limiting the technical solution of the utility model. Based on the disclosure of this application, those skilled in the art can add, reduce or combine the disclosed technical features in the above general description or / and the specific implementation method (including examples) without violating the constituent elements of the utility model involved, to form other technical solutions within the scope of protection of this application.

Claims

1. A vacuum preloading foundation treatment device with alternating positive and negative pressures, characterized in that: The invention comprises a group of mobile pump trucks (1) connected in sequence; the mobile pump truck (1) comprises a frame (11) and wheels (12) arranged at the bottom of the frame (11); a positive pressure pump (2) and a negative pressure pump (3) are installed on the frame (11), and the negative pressure pump (3) and the positive pressure pump (2) are arranged alternately along the length direction of the construction area; the positive pressure pump (2) and the negative pressure pump (3) are respectively electrically connected to a socket box (4) on the frame (11); a plug (5) is also correspondingly provided on the frame (11), and a power cord of the plug (5) is led out from the socket box (4), and two adjacent mobile pump trucks (1) are connected in parallel through the cooperation of the plug (5) and the socket box (4); when in use, the positive pressure pump (2) and the negative pressure pump (3) are respectively connected to corresponding reserved interfaces in the construction area through vacuum pipes.

2. The positive and negative pressure alternating vacuum preloading foundation treatment device according to claim 1 is characterized in that: The frame (11) is provided with a socket (111) which matches the plug (5).

3. The positive and negative pressure alternating vacuum preloading foundation treatment device according to claim 1 is characterized in that: The frame (11) is provided with a cable tie groove (112) for installing the power cord of the plug (5).

4. The positive and negative pressure alternating vacuum preloading foundation treatment device according to claim 1 is characterized in that: A connection hole (113) is respectively provided at both ends of the vehicle frame (11); two adjacent mobile pump vehicles (1) are connected through the cooperation of a connection rope (6) and the connection hole (113).

5. The positive and negative pressure alternating vacuum preloading foundation treatment device according to claim 1 is characterized in that: Two accommodating grooves (114) are arranged at intervals on the frame (11); a support (7) is arranged in the accommodating groove (114); and the positive-pressure pump (2) and the negative-pressure pump (3) are fixed in the support (7).

6. The positive and negative pressure alternating vacuum preloading foundation treatment device according to claim 5 is characterized in that: A reserved hole (115) for the vacuum pipe to pass through is provided on the bottom of the containing groove (114).

7. The positive and negative pressure alternating vacuum preloading foundation treatment device according to claim 5 is characterized in that: The support (7) is integrally formed of stainless steel and is in the shape of a hollow cylinder with openings at both ends.

8. The positive and negative pressure alternating vacuum preloading foundation treatment device according to claim 1 is characterized in that: The socket box (4) is provided with a dust cover.

9. A vacuum preloading foundation treatment system with alternating positive and negative pressures, comprising a drainage system arranged in a construction area; the drainage system comprises a drainage board, a drainage pipe, a sand cushion layer laid on a soft soil foundation, and a vacuum membrane laid on the surface of the sand cushion layer; characterized in that: A pump truck track is installed above the vacuum membrane; a group of foundation treatment devices evenly spaced apart are arranged on the pump truck track; the foundation treatment device is the vacuum preloading foundation treatment device with alternating positive and negative pressures as described in claim 1.

10. The positive and negative pressure alternating vacuum preloading foundation treatment system according to claim 9, characterized in that: The wheels (12) of the mobile pump truck (1) in the foundation treatment device include two wheel bodies (121) arranged in parallel, and the wheel bodies (121) are fixed to the frame (11) via a T-shaped connecting rod; the pump truck track is composed of a plurality of stainless steel pipes, and the outer diameter of the stainless steel pipe is the same as the gap between the two wheel bodies (121).

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