CN111058491A

CN111058491A - Peripheral water pressure distribution active control system of underground building

Info

Publication number: CN111058491A
Application number: CN201911333063.8A
Authority: CN
Inventors: 阮商陶; 原晓辉; 瞿力
Original assignee: Guangdong Huafang Architect & Engineering Co ltd
Current assignee: Guangdong Huafang Architect & Engineering Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-04-24

Abstract

The invention relates to an active control system for peripheral water pressure distribution of an underground building, which comprises an active water pumping port of a basement top plate, a water pumping and backwashing port of a bottom plate, an overflow pipe network, an overflow well ditch and the like. The invention reduces the loss and risk of the underground building in long-term water erosion, reduces the management operation and maintenance cost, prolongs the service cycle of the underground building, and improves the anti-floating strain capacity of sudden rainstorm.

Description

Peripheral water pressure distribution active control system of underground building

Technical Field

The invention relates to the field of underground buildings, in particular to an active control system for the peripheral water pressure distribution of an underground building.

Background

China has many people and few land and is a small country with resources of all individuals, so that the land resources of China are increasingly valued. Underground space has been regarded as a valuable natural resource owned by human beings and not developed in large quantities so far, and developing and utilizing underground space is a realistic way to develop new living space. This is of great significance to human survival and development in the context of the growing world population, where land suitable for survival is becoming increasingly smaller.

China has gained a position of leading soldiers in the capital construction field all over the world due to the rapid development of the last 30 years. The method achieves brilliant results no matter in research and development, customs and construction technology. The cost and social acceptance of underground spaces are major challenges in building underground cities, but the influence 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 spaces is the problem of underground water control. Underground buildings located in the south are often in a humid environment or are directly immersed in groundwater due to the topography of southern hills and rainy weather.

Basements located in non-arid regions are substantially immersed in groundwater from the bottom and side walls of the basements that are in contact with the soil during rainy seasons that can last for months each year. Buildings immersed in water for a long time face both problems of infiltration and long-term buoyancy.

The traditional solution to the infiltration problem is through the provision of self-waterproofing of the concrete structure and building coil coating. In general engineering, after the coiled waterproof material of a building is used for 5 years, the coiled waterproof material of the building is subjected to accelerated degeneration failure, and concrete self-waterproofing is left. As long as the concrete has a crack and a cavity in the pouring process, the common strip-shaped and point-shaped leakage of the underground building can occur immediately. When this occurs, it is most effective to perform high-pressure grouting along the crack in reality. Because water exists on the leakage surface, the adhesion degree of grouting is greatly reduced. The grout also ages with age due to the mixed active petrochemical materials. The groundwater has a certain water pressure, and is generally treated on the inner surface, so that the water is blocked, which is a very difficult project, and a large number of measures are usually adopted, so the effect is very little.

The long-term underground building anti-floating problem, traditional technology mainly has 3 directions of solving:

1. increasing the weight of the basement is a direct and effective method for solving the problem of anti-floating of the basement, but the method should be determined by combining the bearing capacity of the foundation soil. And adding a foundation weight. This method has roughly the following 3 cases: the thickness of the foundation bottom plate is increased, the thickness of the earthing soil on the foundation top surface is increased, and the foundation top surface adopts the filling material with large volume capacity and low price. 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.

2. The anti-floating piles are arranged, have certain safety reserve and actually play a role of 'pressure-resistant piles' for a long time. This "reaction" will prevent the reasonable settlement of basements with anti-floating requirements; it is also an effective way to provide anti-floating piles if the ground water level is above a higher level for a long time.

3. The design elevation of the foundation pit bottom is improved as much as possible, the anti-floating defense water level is indirectly reduced, the foundation burial depth of the beam type raft foundation is larger than that of the flat type raft foundation, and therefore the anti-floating water level is relatively improved, and the flat type raft foundation is more favorable for reducing the anti-floating water level. The use of flat or broad beam floor systems is advocated. The section height of a general wide and flat beam is 1/22-1/16 of a span, and the use of the wide and flat beam can effectively reduce the layer height of an underground structure, so that the anti-floating protection water level is relatively reduced.

Physical resistance is carried out by depending on the engineering uplift anchor rods and the uplift piles, and an embarrassing point in practical use also exists. The engineering pile and the anchor rod are in a long-term tension state. Because the concrete is poured in the construction process under the condition that no extra tensile force is applied to the steel bars, the solidified concrete is simultaneously tensioned with the steel bars, and fine cracks can be generated under the long-term load. Under the condition of underground water immersion, the reinforcing steel bars inside are corroded through capillary action. Under the action of corrosion and tension in the long-term, the reinforcing steel bars can be reduced, and finally, the reinforcing steel bars are deformed too much to accelerate failure. Of course, a 50 year warranty rate has been considered in the design, that is, no failure for 50 years is normal. However, in general, it is desirable that the service life is as long as possible from the viewpoint of the user. In the other extreme case, when a heavy storm or insufficient design consideration occurs, the anchor rod and the pile of the basement are broken, so that the basement floats locally or integrally, and irreparable damage to lives and properties of people is caused. The buoyancy damage is wide in related area, and the foundation, the pillar and the top plate of the building are always damaged permanently, so that the complete repair is extremely difficult.

In general, conventional solutions to the water problem of underground structures always rely on "resistance". Natural forces are constant and powerful and are not necessarily the best way to counter balance for a long time in the whole using process. The human engineering is so trivial under the fright of natural force.

Therefore, it is necessary to design an active control system for the peripheral water pressure distribution of the underground building to dynamically coordinate the balance to solve such problems.

Disclosure of Invention

The invention aims to provide an active control system for the peripheral water pressure distribution of an underground building, which can control the pressure of the peripheral water body, reduce unnecessary long-term water pressure removal of the building and has good economic benefit. The invention is convenient to implement, can prolong the service life and use impression of the building under the condition of not increasing the total operation cost and the manufacturing cost, and is suitable for any project with underground water and in rainy areas.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a peripheral water pressure distribution initiative control system of underground building, including basement roof initiative pumping port, the bottom plate is pumped water and is backflushed mouthful, the buried pipe observation hole in the post, the buried pipe observation hole in the side wall, the overflow pipe network, the overflow well ditch, wherein underground building's roof is provided with basement roof initiative pumping port, bottom plate is pumped water and backflush mouthful setting in underground building's the outside, bottom plate is pumped water and backflush mouthful and underground and peripheral water contact, basement roof initiative pumping port and bottom plate are pumped water and backflush mouthful through the pipe connection intercommunication of burying underground in underground building, underground building's roof is provided with pumping equipment, pumping equipment's water inlet and basement roof initiative pumping port are connected, pumping equipment takes out the water below the basement floor and shifts to rainwater collection system or reserve pool, municipal rainwater pipe network above the basement roof.

Compared with the prior art, the invention has the beneficial effects that: the underground water level control system can actively control the water level of underground water at the periphery of an underground building, realize long-term or temporary water pressure control, effectively prolong the service life of the building and greatly improve the anti-floating capacity of the underground building in a sudden rainstorm scene. The invention has strong universality, is implemented by using the current existing engineering technology, does not need additional secondary development, has simple system manufacture, convenient and clean field construction and obvious economic benefit and social benefit. The invention reduces the loss and risk of the underground building in long-term water erosion, reduces the management operation and maintenance cost, prolongs the service cycle of the whole underground building, greatly improves the anti-floating strain capacity of sudden rainstorm, and provides a set of brand-new underground building use and maintenance scheme.

Drawings

FIG. 1 is a partial perspective view of the system of the present invention;

FIG. 2 is a perspective view of the invention embedded in a column;

FIG. 3 is a cross-sectional view of the side wall inside burying of the present invention;

FIG. 4 is a schematic view of the connection of the overflow pipe network and the collector well according to the present invention;

FIG. 5 is a cross-sectional view showing two directions of burying in the column according to the present invention;

FIG. 6 is a general view of the overflow pipe network burying of the present invention;

fig. 7 is an overall perspective view of the present invention.

In the reference symbols: 1. an active water pumping port is arranged on the top plate of the basement; 2. a water pumping and backflushing opening is formed in the bottom plate; 3. a column inner buried pipe observation hole; 4. pipe burying observation holes are formed in the side walls; 5. an overflow pipe network; 6. and (4) overflowing the well ditch.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the active control system for water pressure distribution at the periphery of an underground building provided by the invention comprises an active pumping port 1 of a top plate of the basement, a pumping and backwashing port 2 of a bottom plate, an observation hole 3 of a buried pipe in a column, an observation hole 4 of a buried pipe in a side wall, an overflow pipe network 5 and an overflow well ditch 6, wherein the active pumping port 1 of the top plate of the basement is arranged on the top plate of the underground building, the pumping and backwashing port 2 of the bottom plate is arranged on the outer side of the underground building, the pumping and backwashing port 2 of the bottom plate is contacted with underground and peripheral water bodies, the active pumping port 1 of the top plate of the basement and the pumping and backwashing port 2 of the bottom plate are connected and communicated through a pipeline embedded in the underground building, a pumping device is arranged on the top plate of the underground building, a water inlet of the pumping device is connected with the active pumping port 1 of the top plate of the, Municipal storm water pipe network.

In the present embodiment, the pipe buried in the underground structure is provided in a building member of the underground structure.

In this embodiment, the building member of the underground structure is a column, a floor, a rear wall, or a foundation member.

In this embodiment, the water pumping device is a vacuum water pumping device.

In the embodiment, the side wall of the underground building is provided with a column embedded pipe observation hole 3 and a side wall embedded pipe observation hole 4, and the column embedded pipe observation hole 3 is communicated with a matched column internal pipe network of the basement top plate active water pumping port 1 and the bottom plate water pumping and back flushing port 2; the side wall inner buried pipe observation hole 4 and the side wall outer water body can be directly connected. The embedded pipe observation hole 3 in the column is connected with the basement top plate driving water pumping port 1 through the vertical straight pipe in the column. The observation hole 3 for the embedded pipe in the column is connected with the water pumping and back flushing port 2 of the bottom plate through the vertical straight pipe in the column; the in-column pipe-embedded observation holes 3 are communicated with the transverse branch sections of the vertical straight pipes embedded in each column and matched in-column pipe networks of the basement top plate active water pumping port 1 and the bottom plate water pumping and back flushing port 2; the side wall internal buried pipe observation hole 4 is directly connected with the water outside the side wall through the side wall internal buried pipe.

In this embodiment, the water level detection device is installed on the embedded pipe observation hole 3 in the column and the embedded pipe observation hole 4 in the side wall, and a signal output end of the water level detection device is connected with the controller. The controller measures and evaluates the water level in real time and gives control instructions to the pumping equipment at each column measuring point.

In this embodiment, the observation hole 3 for the embedded pipe in the column and the observation hole 4 for the embedded pipe in the side wall are further provided with a one-way pressure regulating valve. The one-way pressure regulating valve realizes semi-automatic pressure relief in real time according to set pressure, and discharged water is collected through a drainage open trench and a water collecting well.

In this embodiment, the overflow pipe network 5 is pre-embedded in the column concrete and the floor concrete of the basement before the concrete is poured.

In this embodiment, the overflow pipe network 5 is provided with a one-way pressure regulating valve. And a one-way pressure regulating valve is arranged on the overflow pipe network 5 at the transverse branch section of the vertical straight pipe embedded in each column. The water exceeding the height of the overflow pipe can automatically overflow to the overflow well ditch 6, so that the perennial water pressure of the underground building is reduced, the soaking time is shortened, and the purpose of prolonging the service life on trial is achieved. The overflow shaft ditch 6 is arranged in the basement bottom plate.

In this embodiment, the unidirectional pressure regulating valve installed on the overflow pipe network 5 can automatically overflow water exceeding the height of the overflow pipe to the overflow well trench 6, so as to reduce the annual water pressure of the underground building, reduce the soaking time, and achieve the purpose of prolonging the service life on trial.

The working principle of the invention is as follows: through arranging basement roof initiative pumping port 1 above basement column cap position, roof, be equipped with pumping system, can be connected with rainwater collection system or reserve pond, municipal rainwater pipe network above the basement roof. The active water pumping port 1 of the basement top plate is connected with the water pumping and back flushing port 2 of the bottom plate through a pipeline embedded in the column, so that underground water below the basement bottom plate foundation is pumped to a position above the top plate.

The pipeline embedded in the column is communicated with the embedded pipe observing hole 3 in the column, the real-time water level can be observed visually through the embedded pipe observing hole 3 in the column, and meanwhile, the embedded pipe observing hole 3 in the column is connected with the internet of things host through the embedded potentiometer and sends water level statistical data to the master control computer. The working status and principle of the side wall embedded pipe observation hole 4 and the column embedded pipe observation hole 3 are completely the same.

The overflow pipe network 5 is a pressure-regulating passive overflow pipe network system with a one-way check valve. The terminal of the pipe network is communicated with the overflow well ditch 6, so that the water pressure of the pipeline in the column can be passively released. When the water pressure exceeds the set pressure of the one-way valve, the overflow pipe network 5 automatically releases water to the overflow well ditch 6 through the one-way valve, so that the purpose of reducing the water level all the year round is achieved.

The invention can actively or passively regulate and control the peripheral water level of the underground building, reduce the loss and risk of the underground building in long-term water erosion, reduce the management operation and maintenance cost, prolong the service cycle of the whole underground building, greatly improve the anti-floating strain capacity of sudden rainstorm and provide a set of brand-new underground building use and maintenance scheme.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An active control system for the water pressure distribution at the periphery of an underground building is characterized by comprising an active water pumping port at the top plate of a basement, a water pumping and back flushing port at a bottom plate, an observation hole for a buried pipe in a column, an observation hole for a buried pipe in a side wall, an overflow pipe network and an overflow well ditch, the top plate of the underground building is provided with a basement top plate active water pumping port, the bottom plate pumps water and is arranged on the outer side of the underground building, the bottom plate pumps water and is in contact with underground and peripheral water bodies, the basement top plate active water pumping port and the bottom plate pump water and are communicated with each other through a pipeline buried in the underground building, the top plate of the underground building is provided with a water pumping device, a water inlet of the water pumping device is connected with the basement top plate active water pumping port, and the water pumping device pumps water below the basement bottom plate and transfers the water to a rainwater collecting system or a standby pool above the basement top plate and a municipal rainwater pipe network.

2. The active control system for water pressure distribution around the periphery of underground structure as claimed in claim 1, wherein the pipes buried in the underground structure are installed on the building members of the underground structure.

3. The active control system for water pressure distribution around underground structure as claimed in claim 1, wherein the building member of underground structure is a column, or a floor, a rear wall, or a foundation member.

4. The active control system for the distribution of water pressure around underground structures of claim 1 wherein the water pumping device is a vacuum water pumping device.

5. The active control system for water pressure distribution at the periphery of an underground building as claimed in claim 1, wherein the side wall of the underground building is provided with an embedded pipe observation hole in the column and an embedded pipe observation hole in the side wall, and the embedded pipe observation hole in the column is communicated with a matched in-column pipe network of an active pumping port of a top plate of the basement, a pumping port of a bottom plate and a back flushing port of the bottom plate; the side wall inner buried pipe observation hole is directly connected with the side wall outer water body.

6. The active control system for water pressure distribution at the periphery of underground building as claimed in claim 1, wherein the observation holes of the embedded pipes in the columns and the observation holes of the embedded pipes in the side walls are provided with water level detecting devices, and the signal output ends of the water level detecting devices are connected with the controller.

7. The active control system for water pressure distribution at the periphery of underground building as claimed in claim 1, wherein the observation holes of the embedded pipes in the columns and the observation holes of the embedded pipes in the side walls are further installed with one-way pressure regulating valves.

8. The active control system for the distribution of water pressure at the periphery of an underground building as claimed in any one of claims 1 to 7, wherein the overflow pipe network is pre-embedded in the column concrete and the floor concrete of the basement before the concrete is poured.

9. The active control system for the distribution of water pressure around the periphery of underground structure as claimed in claim 8, wherein the overflow pipe network is provided with a one-way pressure regulating valve.

10. An active control system for the distribution of water pressure around the periphery of an underground building according to claim 9, wherein the overflow pipe network is provided with a one-way pressure regulating valve at a lateral branch section connecting the vertical straight pipes buried in each column.