An active control system for water pressure distribution around underground buildings

Abstract

The present invention is an active control system for water pressure distribution around underground buildings, including active pumping ports on the top plate of the basement, pumping and backwash ports on the bottom plate, overflow pipe network, overflow well trench, etc. The top plate of the underground building is provided with an active pumping port on the top plate of the basement, the pumping and backwash ports on the bottom plate are arranged on the outside of the underground building, the pumping and backwash ports on the bottom plate are in contact with underground and surrounding water bodies, the active pumping port on the top plate of the basement is connected and communicated with the pumping and backwash ports on the bottom plate through pipes buried in the underground building, the top plate of the underground building is provided with a pumping device, the water inlet of the pumping device is connected with the active pumping port on the top plate of the basement, and the pumping device extracts and transfers the water below the bottom plate of the basement to the rainwater collection system or spare pool above the top plate of the basement, and the municipal rainwater pipe network. The present invention reduces the loss and risk of long-term water erosion of underground buildings, reduces management, operation and maintenance costs, prolongs the service life of underground buildings, and improves the anti-floating strain capacity of sudden heavy rains.

Description

Technical Field

[0001] The invention relates to the field of underground buildings, and in particular to an active control system for water pressure distribution around underground buildings. Background Art

[0002] my country has a large population and a small land area, and is a country with small per capita resources. Therefore, we should cherish our land resources even more. Underground space has been regarded as a valuable natural resource owned by mankind that has not been developed on a large scale so far. Developing and utilizing underground space is a more realistic way to open up new living space. This is of great significance to human survival and development in the context of the world's growing population and the decreasing land suitable for survival on land.

[0003] Due to the rapid development in the past 30 years, my country has become a leader in the field of infrastructure worldwide. Brilliant achievements have been made in both research and development and construction technology. The cost and social acceptance of underground space are the main challenges faced in building underground cities, but the impact is limited, and some technical limitations can be solved through scientific research. One of the most troubling engineering problems in the construction and use of underground building space is the problem of groundwater treatment. Underground buildings in the south are in a humid environment all year round or directly immersed in groundwater due to the hilly terrain and rainy climate in the south.

[0004] For basements located in non-arid areas, the basement floor and side walls that are basically in contact with the soil are completely immersed in groundwater during the rainy season that lasts for several months each year. Buildings immersed in water for a long time face two major problems: infiltration and long-term buoyancy.

[0005] The traditional solution to the penetration problem is to set up two checkpoints: self-waterproofing of concrete structures and building coil coatings. Generally speaking, the coiled waterproofing of buildings will deteriorate and fail after 5 years of use, leaving the concrete self-waterproofing. As long as there are cracks and voids during the concrete pouring process, strip and point leakage, which is common in underground buildings, will occur immediately. When this happens, the most effective way in reality is to carry out high-pressure grouting along the cracks. Because there is usually water on the leakage surface at that time, the adhesion of the grouting is greatly reduced. Since the grouting body is a mixed active petrochemical raw material, it will also age with age. There is a certain water pressure in the groundwater, and it is generally treated on the inner surface. Therefore, it is very difficult to implement the project to block the water. Often a lot of measures are taken, but with little effect.

[0006] Traditional technology has three main solutions to the long-term anti-floating problem of underground buildings:

[0007] 1. Increasing the weight of the basement is a direct and effective way to solve the anti-floating problem of the basement, but this method should also be combined with the bearing capacity of the foundation soil. Increase the foundation weight. This method generally has the following three situations: increase the thickness of the foundation slab, increase the thickness of the foundation top surface cover, and use a large and low-cost filler on the foundation top surface. In urban construction, a large amount of filler needs to be backfilled, and the cost is relatively high in terms of environmental protection and transportation.

[0008] 2. Set up anti-floating piles. Anti-floating piles have a certain safety reserve and actually play the role of "anti-compression piles" for a long time. This "reaction" will hinder the reasonable settlement of the basement with anti-floating requirements; if the groundwater level is at a higher level for a long time, setting up anti-floating piles is also an effective way.

[0009] 3. Raise the design elevation of the bottom of the foundation pit as much as possible, and indirectly reduce the anti-floating water level. The foundation depth of the beam raft foundation is greater than that of the flat raft foundation, which relatively increases the anti-floating water level. Therefore, the flat raft foundation is more conducive to reducing the anti-floating water level. The floor slab is recommended to use wide flat beams or beamless floor slabs. Generally, the cross-sectional height of the wide flat beam is 1 / 22 to 1 / 16 of the span. The use of wide flat beams will effectively reduce the floor height of the underground structure, thereby relatively reducing the anti-floating water level.

[0010] Relying on engineering anti-pulling anchor rods and anti-pulling piles for physical resistance also has embarrassing points in actual use. Engineering piles and anchor rods are under long-term tension. Since the pouring of concrete during construction is carried out without applying additional tension to the steel bars, the solidified concrete is pulled at the same time as the steel bars, and fine cracks will be generated under long-term load. Under the condition of groundwater immersion, the steel bars inside are eroded by capillary action. Under the long-term erosion and tension, the steel bars themselves will be reduced, and eventually the deformation will be too large and accelerate failure. Of course, the 50-year guarantee rate has been considered in the design, that is, it will not fail in 50 years under normal circumstances. But in general, from the user's perspective, of course, the longer the service life, the better. In another extreme case, in heavy rain or insufficient design considerations, the basement anchor rods and piles are pulled off, causing partial or overall floating, which will cause irreparable damage to the lives and property of the people. This kind of buoyancy damage involves a wide range of areas, and often the foundation, columns, and top plates of the building are permanently damaged, and it is extremely difficult to completely repair them.

[0011] In general, the traditional solution to the water problem of underground buildings always relies on "resistance". The power of nature is permanent and powerful, and it is not necessarily the best way to resist it for a long time during the entire use process. Human engineering seems so insignificant under the deterrence of natural forces.

[0012] Therefore, it is necessary to design an active control system for water pressure distribution around underground buildings to solve such problems through dynamic coordination and balance. Summary of the invention

[0013] The purpose of the present invention is to provide an active control system for water pressure distribution around underground buildings. The present invention can control the pressure of surrounding water bodies, reduce unnecessary long-term water pressure of the building itself, and has good economic benefits. The present invention is easy to implement and can extend the service life and usage experience of the building without increasing the total operating cost and construction cost. It is suitable for any project with groundwater and in rainy areas.

[0014] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an active control system for water pressure distribution in the periphery of an underground building, comprising an active water pumping port on the top plate of a basement, a water pumping and backwashing port on the bottom plate, observation holes for buried pipes in columns, observation holes for buried pipes in side walls, an overflow pipe network, and an overflow well trench, wherein the top plate of the underground building is provided with an active water pumping port on the top plate of the basement, the water pumping and backwashing port on the bottom plate is provided on the outside of the underground building, the water pumping and backwashing port on the bottom plate is in contact with underground and surrounding water bodies, the active water pumping port on the top plate of the basement is connected to the water pumping and backwashing port on the bottom plate through a pipeline buried in the underground building, the top plate of the underground building is provided with a pumping device, the water inlet of the pumping device is connected to the active water pumping port on the top plate of the basement, and the pumping device extracts water below the bottom plate of the basement and transfers it to a rainwater collection system or a standby pool or a municipal rainwater pipe network above the top plate of the basement.

[0015] Compared with the prior art, the beneficial effects of the present invention are: it can actively control the water level of groundwater around underground buildings, realize long-term or temporary water pressure control, effectively extend the service life of buildings, and greatly improve the anti-floating ability of underground buildings in sudden rainstorms. The present invention has strong versatility and is implemented using existing engineering technologies. It does not require additional secondary development. The system is simple to manufacture, and the on-site construction is convenient and clean, with obvious economic and social benefits. The present invention reduces the loss and risk of long-term water erosion of underground buildings, reduces management, operation and maintenance costs, extends the service life of the entire underground building, greatly improves the anti-floating strain capacity of sudden rainstorms, and proposes a new set of underground building use and maintenance solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a partial stereogram of the system of the present invention;

[0017] Figure 2 It is a three-dimensional diagram of the buried column of the present invention;

[0018] Figure 3 It is a cross-sectional view of the side wall embedment of the present invention;

[0019] Figure 4It is a schematic diagram of the connection between the overflow pipe network and the water collection well of the present invention;

[0020] Figure 5 It is a cross-sectional view of two directions of embedding in the column of the present invention;

[0021] Figure 6 It is the general buried diagram of the overflow pipe network of the present invention;

[0022] Figure 7 It is an overall stereogram of the present invention.

[0023] In the attached drawings: 1. Active water pumping port on the basement roof; 2. Water pumping and backwash port on the bottom plate; 3. Observation hole for buried pipes in columns; 4. Observation hole for buried pipes in side walls; 5. Overflow pipe network; 6. Overflow well trench. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-5 The present invention provides an active control system for water pressure distribution in the periphery of an underground building, comprising an active water pumping port 1 on the top plate of a basement, a water pumping and backwashing port 2 on the bottom plate, an observation hole 3 for buried pipes in a column, an observation hole 4 for buried pipes in a side wall, an overflow pipe network 5, and an overflow well ditch 6, wherein the top plate of the underground building is provided with an active water pumping port 1 on the top plate of the basement, the water pumping and backwashing port 2 on the bottom plate is provided on the outside of the underground building, the water pumping and backwashing port 2 on the bottom plate is in contact with underground and surrounding water bodies, the active water pumping port 1 on the top plate of the basement is connected to the water pumping and backwashing port 2 on the bottom plate through a pipeline buried in the underground building, the top plate of the underground building is provided with a pumping device, the water inlet of the pumping device is connected to the active water pumping port 1 on the top plate of the basement, and the pumping device extracts water below the bottom plate of the basement and transfers it to a rainwater collection system or a standby pool or a municipal rainwater pipe network above the top plate of the basement.

[0026] In this embodiment, the above-mentioned pipeline buried in the underground building is arranged on the building components of the underground building.

[0027] In this embodiment, the building components of the underground building are columns, or floor slabs, rear side walls, or foundation components.

[0028] In this embodiment, the above-mentioned pumping equipment is a vacuum pumping equipment.

[0029] In this embodiment, the side wall of the underground building is provided with a column buried pipe observation hole 3 and a side wall buried pipe observation hole 4. The column buried pipe observation hole 3 is connected to the supporting column pipe network of the basement top plate active pumping port 1 and the bottom plate pumping and backwashing port 2; the side wall buried pipe observation hole 4 and the water body outside the side wall can be directly connected. The column buried pipe observation hole 3 is connected to the basement top plate active pumping port 1 through a vertical straight pipe in the column. The column buried pipe observation hole 3 is connected to the bottom plate pumping and backwashing port 2 through a vertical straight pipe in the column; the horizontal branch section of the vertical straight pipe buried in each column of the column buried pipe observation hole 3 is connected to the supporting column pipe network of the basement top plate active pumping port 1 and the bottom plate pumping and backwashing port 2; the side wall buried pipe observation hole 4 is directly connected to the water body outside the side wall through the side wall buried pipe.

[0030] In this embodiment, the above-mentioned buried pipe observation hole 3 in the column and the buried pipe observation hole 4 in the side wall are equipped with a water level detection device, and the signal output end of the water level detection device is connected to the controller. The controller measures and evaluates the water level in real time and gives control instructions to the pumping equipment at each column measurement point.

[0031] In this embodiment, the above-mentioned column buried pipe observation hole 3 and side wall buried pipe observation hole 4 are also equipped with a one-way pressure regulating valve. The one-way pressure regulating valve realizes semi-automatic pressure relief in real time according to the set pressure, and the discharged water is collected through the drainage ditch and the water collection well.

[0032] In this embodiment, the overflow pipe network 5 is pre-buried in the column concrete and the bottom slab concrete of the basement before pouring concrete.

[0033] In this embodiment, the overflow pipe network 5 is equipped with a one-way pressure regulating valve. The overflow pipe network 5 is provided with a one-way pressure regulating valve in the horizontal branch section connecting the vertical straight pipe buried in each column. Water exceeding the height of the overflow pipe can be automatically overflowed to the overflow well 6 to reduce the annual water pressure of the underground building, reduce the immersion time, and achieve the purpose of extending the trial life. The overflow well 6 is set in the basement floor.

[0034] In this embodiment, the one-way pressure regulating valve installed on the overflow pipe network 5 can automatically overflow the water exceeding the overflow pipe height into the overflow well ditch 6, so as to reduce the annual water pressure of the underground building, reduce the immersion time, and achieve the purpose of extending the trial life.

[0035] The working principle of the present invention is: through the basement top plate active pumping port 1 arranged at the basement column head position and above the top plate, equipped with a pumping system, it can be connected to the rainwater collection system or standby pool above the basement top plate, and the municipal rainwater pipe network. The basement top plate active pumping port 1 is connected to the bottom plate pumping and backwash port 2 through the pipeline buried in the column, so as to pump the groundwater below the basement bottom plate foundation to above the top plate.

[0036] The pipes buried in the column are connected to the observation hole 3 buried in the column. The real-time water level can be observed visually through the observation hole 3 buried in the column. At the same time, the observation hole 3 buried in the column is connected to the Internet of Things host through the buried potentiometer to send water level statistics to the main control computer. The working position and principle of the observation hole 4 buried in the side wall are exactly the same as those of the observation hole 3 buried in the column.

[0037] The overflow pipe network 5 is a pressure-adjusted passive overflow pipe network system with a one-way check valve. The pipe network terminal is connected to the overflow well ditch 6, and the purpose is to passively release the water pressure in the column pipeline. When the water pressure exceeds the set pressure of the one-way valve, the overflow pipe network 5 automatically releases water into the overflow well ditch 6 through the one-way valve, achieving the purpose of lowering the water level all year round.

[0038] The present invention can actively or passively regulate and lower the surrounding water level of underground buildings, reduce the loss and risk of long-term water erosion of underground buildings, reduce management, operation and maintenance costs, extend the service life of the entire underground building, greatly improve the anti-floating resilience of sudden rainstorms, and propose a new set of underground building use and maintenance solutions.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An active control system for water pressure distribution around underground buildings, characterized in that It includes active water pumping ports on the top plate of the basement, water pumping and backwash ports on the bottom plate, observation holes for buried pipes in columns, observation holes for buried pipes in side walls, overflow pipe networks, and overflow well trenches. The top plate of the underground building is provided with active water pumping ports on the top plate of the basement. The water pumping and backwash ports on the bottom plate are provided on the outside of the underground building. The water pumping and backwash ports on the bottom plate are in contact with underground and surrounding water bodies. The active water pumping ports on the top plate of the basement are connected and communicated with the water pumping and backwash ports on the bottom plate through pipes buried in the underground building. The top plate of the underground building is provided with pumping equipment. The water inlet of the pumping equipment is connected with the active water pumping ports on the top plate of the basement. The pumping equipment extracts water below the bottom plate of the basement and transfers it to the rainwater collection system or standby pool above the top plate of the basement, or the municipal rainwater pipe network. The side walls of the above-mentioned underground buildings are provided with observation holes for buried pipes in columns and in side walls. The observation holes for buried pipes in columns are connected to the supporting column pipe networks of the active water pumping port on the top plate of the basement, the water pumping port on the bottom plate and the backwash port; the observation holes for buried pipes in the side walls are directly connected to the water body outside the side walls; The above-mentioned buried pipe observation holes in the columns and the buried pipe observation holes in the side walls are equipped with water level detection devices, and the signal output end of the water level detection device is connected to the controller.

2. The active control system for water pressure distribution around underground buildings according to claim 1 is characterized in that The above-mentioned pipeline buried in the underground building is arranged on the building components of the underground building.

3. The active control system for water pressure distribution around underground buildings according to claim 1 is characterized in that The building components of the above-mentioned underground building are columns, or floor slabs, rear side walls, or foundation components.

4. The active control system for water pressure distribution around underground buildings according to claim 1, characterized in that The above-mentioned pumping equipment is a vacuum pumping equipment.

5. The active control system for water pressure distribution around underground buildings according to claim 1, characterized in that The above-mentioned buried pipe observation holes in the columns and the buried pipe observation holes in the side walls are also equipped with one-way pressure regulating valves.

6. The active control system for water pressure distribution around underground buildings according to any one of claims 1 to 5, characterized in that The above overflow pipe network is embedded in the column concrete and the bottom slab concrete of the basement before pouring concrete.

7. The active control system for water pressure distribution around underground buildings according to claim 6, characterized in that A one-way pressure regulating valve is installed on the overflow pipe network.

8. The active control system for water pressure distribution around underground buildings according to claim 7, characterized in that A one-way pressure regulating valve is provided on the above overflow pipe network at the transverse branch section connected to the vertical straight pipe buried in each column.

Images