Vacuum preloading pressurizing pipe
By using a combined structure of fine pores and deflectors in the vacuum prepressurization tube, the problems of low drainage efficiency and overflow in the vacuum prepressurization method are solved, and a better foundation reinforcement effect is achieved.
Patent Information
- Application Number
- CN202420848168.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The existing vacuum pre-pressure method has low drainage efficiency in soil, resulting in poor foundation reinforcement effect, especially due to overflow problems caused by blockage of drainage plates.
A vacuum prepressurized booster tube was designed to achieve uniform gas injection through fine pores on the gas injection section, and a flow guide was set at the top of the gas injection section to prevent gas overflow and guide gas into the soil. The combined structure of the hose and hard pipe section avoids sudden change in the pressure between the gas input pipeline and the gas injection section.
A uniform gas injection is achieved, overflow problems are avoided, the foundation reinforcement effect is improved, the soil consolidation and drainage capacity is enhanced, and the foundation consolidation effect is improved.
Smart Images
Figure CN222275448U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas injection and pressurization in vacuum pre-pressurization, in particular to a vacuum pre-pressurization and pressurization pipe. Background Art
[0002] In engineering practice, for large areas of soft soil layers such as lake silt, pond sludge, and channel dredged soil, their bearing capacity is very poor. If you need to build a building on this soil layer, you need to reinforce this soil layer first. The most common method is to use air preloading soft soil foundation treatment technology for reinforcement. Vacuum preloading soft soil foundation treatment technology was introduced to my country in the 1980s. In recent years, with the in-depth research in my country, this technology has been fully applied and developed, and various improved methods have emerged. Commonly used methods include direct discharge vacuum preloading, vacuum preloading combined with electroosmosis, membraneless vacuum preloading, deep gas pressure splitting vacuum preloading, and gas injection boosting technology.
[0003] The essence of vacuum preloading treatment of soft soil foundation is the consolidation and drainage process of soil. The mechanism that promotes the consolidation of soft soil foundation is divided into two parts: one is the vertical pressure difference between vacuum load and soil; the other is the horizontal pressure difference between vertical drainage board and surrounding soil due to vacuum pressure. The preloading effect of vacuum load is mainly due to the removal of gas inside the sealing membrane during the vacuuming process, thereby forming an atmospheric pressure difference between the inner and outer surfaces of the sealing membrane, that is, vacuum load, which is equal to the difference between the inner and outer air pressures of the sealing membrane. Due to the rapid attenuation of vacuum degree in the soil, the vacuum degree of the soil is lower than the vacuum degree of the drainage board, and a horizontal pressure difference is formed between the soil around the vertical drainage board. This pressure difference provides an osmotic pressure for the pore water in the soil, prompting the pore water in the soil to seep to the drainage board, achieving the purpose of horizontal drainage. However, in practical applications, the vacuum degree is often blocked in the soil, resulting in low efficiency in the transmission of vacuum degree in the soil, making it difficult to achieve the purpose of drainage.
[0004] In order to solve the problems existing in the prior art, technicians in this field have made many efforts. For example, Chinese patent application CN 107642079A proposes a vacuum pre-pressurized gas injection booster pipe, which is supported by springs and wire mesh filter membranes to ensure that it does not swing, thereby increasing the uniformity of its gas injection; however, overflow is prone to occur, resulting in poor foundation reinforcement effect. Utility Model Content
[0005] In order to solve the above problems, the utility model provides a vacuum pre-compression booster pipe, which realizes uniform gas injection through the fine pores on the gas injection section, and cooperates with the guide plate to guide the overflow gas around the gas injection section into the surrounding soil, thereby achieving uniform gas injection and avoiding overflow, thereby improving the foundation reinforcement effect.
[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is a vacuum pre-pressure booster pipe, comprising a hose section, a hard pipe section and a gas injection section; the hose section is connected to the hard pipe section via a pneumatic joint; the hard pipe section is connected to the gas injection section via a sealing joint; the gas injection section is covered with fine pores; a guide plate is also provided at the connection between the hard pipe section and the gas injection section to prevent the injected gas from going up along the pipeline.
[0007] Furthermore, the interval between the pores in the gas injection section is 100 um.
[0008] Furthermore, the guide plate is in a circular ring shape and is sleeved on the top of the gas injection section; the difference between the inner and outer radii of the guide plate is 3 cm.
[0009] Furthermore, the lower surface of the guide plate is in an arc shape.
[0010] Furthermore, the diameter of the hard pipe is 3-5 cm; the diameter difference between the hard pipe and the soft pipe is less than 4 cm.
[0011] Furthermore, the connection between the sealing joint, the hard pipe section and the gas injection section is wrapped with waterproof sealing tape.
[0012] The technical solution described in the utility model has the following beneficial effects:
[0013] 1. The utility model realizes uniform gas injection through fine pores on the gas injection section, and makes the spacing between pores 100um, thus realizing the fineness of pores as much as possible, improving the uniformity of gas injection to the greatest extent, and better preventing the problem of soil clogging, thereby increasing the foundation reinforcement effect.
[0014] 2. The utility model uses a guide plate arranged at the top of the gas injection section, so that when the gas "squeezes away" the silt around the wall of the gas injection section to form an air flow channel interlayer along the wall of the booster pipe, it can prevent the gas from overflowing along the interlayer and along the pipeline to under the membrane, causing the problem of gas bulging. At the same time, the overflowing gas can be diverted to the surrounding soil, further increasing the foundation reinforcement effect.
[0015] 3. The utility model uses a soft pipe as the gas input port to avoid the booster pipe from damaging the sealing membrane laid on the surface. By using a hard pipe section as an intermediate transition pipe, on the one hand, it can realize gas injection and pressurization deep in the soil and can better resist the pressure of the surrounding soil. On the other hand, it avoids the problem of sudden pressure changes caused by the large diameter difference between the gas input pipe and the gas injection section, and avoids the influence of sudden pressure changes on the gas injection effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below according to specific embodiments and in combination with the accompanying drawings.
[0017] Figure 1 It is a structural schematic diagram of the vacuum pre-pressurization and boosting pipe described in the utility model.
[0018] Figure 2 It is a top view of the vacuum pre-pressurization and boosting pipe described in the utility model.
[0019] Figure 3 It is a schematic diagram of the guide vane structure.
[0020] Figure 4 It is a cross-sectional view of the guide vane.
[0021] Among them, 1-hose section; 2-hard pipe section; 3-gas guide plate; 4-gas injection section; 5-pneumatic joint; 6-sealing joint. DETAILED DESCRIPTION
[0022] The technical solution of the utility model is further explained below in conjunction with the accompanying drawings, but it is not limited to this. Any modification or equivalent replacement of the technical solution of the utility model without departing from the spirit and scope of the technical solution of the utility model should be included in the protection scope of the utility model.
[0023] like Figure 1 As shown, this embodiment provides a vacuum pre-pressurization booster pipe, including a hose section 1, a hard pipe section 2 and an injection section 4. The hose section 1 and the hard pipe section 2 are connected by a pneumatic joint 5 for realizing quick plugging and unplugging, so as to facilitate the construction of intubation and the connection of surface pipelines after intubation; the hard pipe section 2 and the injection section 4 are connected by a sealing joint 6, and the injection section 4 is covered with fine pores, the size of the pores is less than 0.05mm, and the interval between the pores is 100um; wherein, the hard pipe section 2 adopts a PVC plastic pipe, so that the hard pipe section 2 has good pressure resistance during use, and can well resist the pressure brought by the surrounding soil; the injection section 4 adopts a high-temperature powder sintered gas column, which is made of white corundum, silicon carbide, corundum, and silica sand mixed and sintered at a high temperature of 1500°C, and the gas output is fine and uniform.
[0024] At the top of the gas injection section 4, that is, the connection between the gas injection section 4 and the hard pipe section 2, a guide plate 3 is sleeved. The guide plate 3 is in a circular ring and is made of rubber material. The difference between the inner and outer radius of the guide plate 3 is 3 cm, and the lower surface of the guide plate 3 is in an arc shape, which is used to guide the overflow gas to diffuse into the surrounding soil, avoiding the gas from overflowing along the interlayer and along the pipeline to the bottom of the membrane, causing the problem of gas bulging.
[0025] Preferably, the gas inlet on the soft pipe is also connected to a gas supply device; the diameter of the hard pipe is 3-5cm, the length is 1-2m, and the diameter difference between the soft pipe section 1 and the hard pipe section 2 is less than 4cm. By using the hard pipe section 2 as a transition section, on the one hand, it is possible to achieve deep gas injection and pressurization in the soil, and can better resist the pressure of the surrounding soil. On the other hand, it avoids the problem of sudden pressure changes caused by the large diameter difference between the gas input pipeline and the gas injection section 4, thereby avoiding the influence of sudden pressure changes on the gas injection effect.
[0026] Preferably, the joints between the sealing joint 6 and the hard pipe section 2 and the gas injection section 4 are wrapped with waterproof sealing tape to ensure the sealing of the boosting pipe.
[0027] Preferably, the sealing joint 6 adopts a thread-to-thread structure, and may also adopt an equivalent alternative structure such as a flange connection.
[0028] Working principle:
[0029] When in use, the gas injection section 4 is connected to the hard pipe section 2 through the sealing joint 6 and wrapped with waterproof sealing tape, and then the guide plate 3 is put on the top of the gas injection section 4 and fixed, and then inserted into the soil; after the hard pipe section 2 and the gas injection section 4 are installed, the hose section 1 is connected to the hard pipe section 2 through the pneumatic joint 5, and then the surface pipeline is laid, the air supply device is connected to the hose section 1, and the air tightness of the entire device is checked. After confirming that it is good, the air supply device can be turned on to carry out the gas injection work.
[0030] The utility model realizes uniform gas injection through the fine pores on the gas injection section 4, and makes the spacing between the pores 100um, thereby realizing the fineness of the pores as much as possible, improving the uniformity of gas injection to the greatest extent, and better preventing the problem of soil clogging, thereby increasing the foundation reinforcement effect; and cooperates with the guide plate 3 arranged at the top of the gas injection section 4, so that when the gas "squeezes away" the silt around the pipe wall of the gas injection section 4 to form an air flow channel interlayer along the wall of the booster pipe, it can prevent the gas from overflowing along the interlayer and along the pipeline to the bottom of the membrane, causing the problem of gas bulging, and at the same time can guide the overflow gas to the surrounding soil, further increasing the foundation reinforcement effect.
[0031] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A vacuum pre-pressurization booster pipe, characterized in that: The invention comprises a hose section (1), a hard pipe section (2) and a gas injection section (4); the hose section (1) is connected to the hard pipe section (2) via a pneumatic joint (5); the hard pipe section (2) is connected to the gas injection section (4) via a sealing joint (6); the gas injection section (4) is covered with fine pores; a guide plate (3) is also provided at the connection between the hard pipe section (2) and the gas injection section (4) to prevent the injected gas from moving upward along the pipeline.
2. The vacuum pre-pressurization booster pipe according to claim 1, characterized in that: The interval between the pores on the gas injection section (4) is 100 um.
3. The vacuum pre-pressurization booster pipe according to claim 1, characterized in that: The guide plate (3) is in the shape of a circular ring and is sleeved on the top of the gas injection section (4); the difference between the inner and outer radii of the guide plate (3) is 3 cm.
4. The vacuum pre-pressurization booster pipe according to claim 3, characterized in that: The lower surface of the guide plate (3) is in an arc shape.
5. The vacuum pre-pressurization booster pipe according to claim 1, characterized in that: The diameter of the hard pipe section (2) is 3-5 cm; the diameter difference between the hard pipe section (2) and the soft pipe section (1) is less than 4 cm.
6. The vacuum pre-pressurization booster pipe according to claim 1, characterized in that: The connection between the sealing joint (6) and the hard pipe section (2) and the gas injection section (4) is wrapped with waterproof sealing tape.