CN113062367A - Underground building system with anti-floating monitoring and self-correcting functions and construction method thereof - Google Patents
Underground building system with anti-floating monitoring and self-correcting functions and construction method thereof Download PDFInfo
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- CN113062367A CN113062367A CN202110369503.6A CN202110369503A CN113062367A CN 113062367 A CN113062367 A CN 113062367A CN 202110369503 A CN202110369503 A CN 202110369503A CN 113062367 A CN113062367 A CN 113062367A
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Abstract
An underground building system with anti-floating monitoring and self-correcting functions and a construction method thereof comprise an underground structure top plate, an underground structure bottom plate, an underground structure wallboard, a ground structure, a flexible sealing waterproof layer, a composite vacuum waterproof and drainage integrated plate, a water filtering layer, a water collecting tank, a water level observation pipe and a pumping automation remote control module; a self-balancing water tank is arranged in the top plate of the underground structure; a drain pipe is arranged in the water filtering layer; the water collecting tank is arranged below the outer side of the bottom plate of the underground structure; the water collecting tank is communicated with the drain pipe through a connecting pipe; a water pumping device is arranged in the water collecting tank; a connecting pipe is connected between the water pumping device and the water collecting tank; a water level observation pipe is arranged on the inner side of the underground structure wallboard; an underground water level sensor is arranged on the side wall of the water level observation pipe; the underground structure bottom plate is provided with a grouting pipeline, and the underground structure bottom plate is embedded with a prestressed anti-floating anchor rod. The invention solves the problems that the traditional underground building is not anti-floating enough, cannot alarm in time and correct automatically, and is difficult to solve the anti-floating problem of the underground building in time and high efficiency.
Description
Technical Field
The invention belongs to the technical field of building engineering, and particularly relates to an underground building system with anti-floating monitoring and self-correcting functions and a construction method thereof.
Background
With the vigorous development of urban construction, people have higher and higher requirements on the utilization of basement spaces, the construction quantity of basements and civil air defense basements is more and more, and the area is larger and larger, so that the problem of how to solve the anti-floating problem of the basements in the structural design becomes a problem which is often faced, and the wide attention of engineers is aroused.
In recent years, engineering accidents of integral floating of a structure or local uplift and breakage of a basement bottom plate caused by water buoyancy appear in basements of a plurality of buildings, and countless property loss and civil disputes are brought. The main reasons for analysis by engineering cases are: the underground building anti-floating system is lack of overall design, is difficult to monitor, and cannot be timely processed after the anti-floating problem occurs. The existing anti-floating device, such as the arrangement of a prestressed anti-floating anchor rod, can only solve the anti-floating problem within a certain limit, and once the buoyancy exceeds the bearing range of the prestressed strain of the prestressed anti-floating anchor rod, the anti-floating problem is difficult to find and solve in time.
Disclosure of Invention
The invention aims to provide an underground building system with anti-floating monitoring and self-correcting functions and a construction method thereof, and aims to solve the problems that the traditional underground building anti-floating system is difficult to monitor, cannot give an alarm in time and perform automatic correction, and is uncontrollable in anti-floating.
In order to achieve the purpose, the invention adopts the following technical scheme.
An underground building system with anti-floating monitoring and self-correcting functions comprises an underground structure top plate, an underground structure bottom plate, an underground structure wall plate connected between the underground structure top plate and two sides of the underground structure bottom plate and a ground structure arranged on the top of the underground structure top plate; the water level monitoring device also comprises a flexible sealing waterproof layer, a composite vacuum waterproof and drainage integrated plate, a water filtering layer, a water collecting tank, a water level observation pipe and a pumping automation remote control module; a self-balancing water tank is arranged inside the top plate of the underground structure along the transverse through length; the flexible sealing waterproof layer is laid on the outer walls of the underground structure top plate, the underground structure wall plate and the underground structure bottom plate; the composite vacuum water-drainage-preventing integrated plate is laid on the outer side of the flexible sealing waterproof layer, and a waterproof geotextile layer is laid on the outer side of the composite vacuum water-drainage-preventing integrated plate; the water filtering layer is arranged on the outer side of the periphery of the underground structure wallboard and is attached to the outer surface of the waterproof geotextile layer, and a drain pipe is arranged at the lower part of the water filtering layer along the longitudinal through length; the water collecting tank is arranged below two sides of the bottom plate of the underground structure, and the top of the water collecting tank is higher than the bottom surface of the water filtering layer; the water collecting tank is communicated with the drain pipe through a connecting pipe; a water pumping device is fixed in the water collecting tank; the output end of the water pumping device is connected with a water pumping pipe, and the upper end of the water pumping pipe is communicated with the self-balancing water tank; water level observation pipes are fixed at the inner corner positions of the underground structure wall boards; the lower end of the water level observation pipe extends into soil below the bottom plate of the underground structure, and underground water level sensors are fixed on the side walls of the water level observation pipe; grouting pipelines are arranged on the underground structure bottom plate and the underground structure wall plate at intervals, and prestressed anti-floating anchor rods are pre-buried in the underground structure bottom plate; the upper end of the prestressed anti-floating anchor rod exceeds the top of the underground structure bottom plate, and the lower end of the prestressed anti-floating anchor rod is anchored in soil; stress-strain sensors are respectively arranged on two sides of the prestressed anti-floating anchor rod; the pumping automation remote control module is respectively in signal connection with the stress strain sensor and the underground water level sensor and processes the received data of the stress strain sensor and the received data of the underground water level sensor; the water pumping automation remote control module is connected with the water pumping device and controls the opening and closing of the water pumping device according to the processed data.
Preferably, a waterproof sealing layer is laid on the inner surface of the self-balancing water tank.
Preferably, an overflow pipe is fixed to the top of the self-balancing water tank, and the top of the overflow pipe extends to the upper side of the ground structure.
Preferably, the water pumping device is provided with an automatic switching device, and the automatic remote control module for water pumping controls the on-off of the water pumping device by controlling the automatic switching device.
Preferably, the water pumping device is provided with a manual switch device; the underground building system with the anti-floating monitoring and self-correcting functions further comprises an alarm device; the alarm device is in signal connection with the pumping automation remote control module and is used for giving an alarm through the alarm device after an alarm condition occurs; and after receiving the alarm, the field personnel can adopt a manual switch device to open and close the water pumping device.
A method of constructing an underground building system, comprising the steps of:
and S1, forming holes at the positions of the water level observation pipe and the prestressed anti-floating anchor rod on the bottom surface of the foundation pit according to the design requirements of the prestressed anti-floating anchor rod and the water level observation pipe.
And S2, laying waterproof geotextile at the bottom below the underground building to be constructed.
And S3, paving the composite vacuum waterproof and drainage integrated plate at the bottom of the underground building to be constructed on the waterproof geotextile below the underground building to be constructed according to the position requirements of the prestressed anti-floating anchor rods and the water level observation pipes.
And S4, installing a hole forming pipe at the hole forming position of the prestressed anti-floating anchor rod.
And S5, welding and forming the composite vacuum waterproof and drainage integrated plate, the concrete forming pipe and the water level observation pipe which are positioned at the bottom of the underground building to be constructed.
And S6, installing a grouting pipeline.
S7, pouring of the bottom plate of the underground structure, the wall plates of the underground structure and the top plate of the underground structure.
S8, after the underground structure wall plate and the underground structure top plate meet the strength requirement, installing a composite vacuum waterproof and drainage integrated plate on the outer side of the underground structure wall plate and the underground structure top plate, and paving waterproof geotextile on the lateral side on the outer side of the composite vacuum waterproof and drainage integrated plate to form the composite vacuum waterproof and drainage integrated plate and the waterproof geotextile layer which can wrap the underground building in an all-around manner.
And S9, after the underground structure bottom plate meets the strength requirement, removing the hole forming pipe, installing a prestress anti-floating anchor rod, and installing a structure strain sensor system comprising a stress strain sensor.
And S10, installing the structural anti-floating treatment system.
S1001, laying a water drainage pipe and installing a water collection tank on the periphery of a building main body according to the position requirement of the design of the water collection tank and the water drainage pipe, and connecting the water drainage pipe and the water collection tank through a connecting pipe.
S1002, a water pumping pipe is arranged inside the water collecting tank, and a water pumping device and a water pumping automatic control module are arranged at the lower end of the water pumping pipe.
S1003, constructing a self-balancing water tank, and connecting the upper end of the water pumping pipe with the self-balancing water tank.
And S11, backfilling drainage and graded sand for filtering outside the waterproof geotechnical cloth layer of the wall and the middle position of the soil to form a water filtering layer, and constructing the upper surface of the waterproof geotechnical cloth layer at the top of the underground building through a ground structure to form a ground structure at the top.
S12, respectively setting a grouting pipeline penetrating through the bottom plate of the underground structure and a grouting pipeline penetrating through the wall plate of the underground structure according to design requirements, and injecting flexible waterproof materials into the gaps between the bottom plate of the underground structure and the composite vacuum waterproof and drainage integrated plate and the gaps between the wall plate of the underground structure and the composite vacuum waterproof and drainage integrated plate in a split area at high pressure to form a flexible sealing waterproof layer.
And S13, installing an underground water level sensor at the designed water level height of the water level observation pipe.
S14, the water level sensor, the stress strain sensor and the water pumping device are in signal connection with the water pumping remote automation control module respectively, and threshold values for opening and closing the water pumping device are set for monitoring data transmitted to the water pumping remote automation control module by the stress strain sensor and the underground water level sensor.
And S15, stopping precipitation by the precipitation well, and checking and accepting the waterproof system.
And S16, carrying out system debugging of the water pumping automation remote control module with the anti-floating real-time monitoring and self-correcting functions of the underground building system.
And S17, delivering the underground building system for use after the underground building system meets the processing requirements of anti-floating real-time monitoring and self-correcting functions.
Preferably, in the step S2, if a concrete cushion is arranged at the bottom of the foundation pit, the concrete cushion is constructed first, and then the waterproof geotextile is laid on the concrete cushion.
Preferably, after the construction of the self-balancing water tank is completed, an overflow pipe is installed at the top of the self-balancing water tank, and a waterproof sealing layer is constructed on the inner surface of the self-balancing water tank.
Preferably, when the underground building system with the anti-floating monitoring and self-correcting functions is provided with an alarm device, the step S14 further includes the step of connecting the alarm device with the pumping remote automatic control module by signals, and setting a threshold value for turning on and off the alarm device for monitoring data transmitted from the stress strain sensor and the groundwater level sensor to the pumping remote automatic control module.
Preferably, the water pumping automation remote control module in the step S16 requires that:
(a) monitoring water level data of the water level observation pipe in real time, monitoring stress strain data of the prestressed anti-floating anchor rod in real time, and automatically starting an alarm device and a water pumping device when the monitored data exceed a preset threshold value;
(b) when the monitoring data is lower than a preset threshold value, the alarm device and the water pumping device are automatically closed;
(c) the pumping automation remote control module takes underground building areas as units, the buoyancy of underground water is consistent in the same underground building area, the underground water is pumped to the same self-balancing water tank, the buoyancy of the underground water is different, and the pumping automation remote control module independently controls the corresponding underground building areas.
Compared with the prior art, the invention has the following characteristics and beneficial effects.
(1) The change condition of the groundwater level is monitored through the water level sensor, the stress change condition of the prestress anti-floating anchor rod is monitored through the stress strain sensor, the anti-floating force change condition of an underground building is monitored, the groundwater level rises to trigger the water level sensor, meanwhile, the buoyancy is increased due to the rise of the groundwater level, the stress of the prestress anti-floating anchor rod also changes, and when the stress change exceeds the set value of the stress strain sensor, an alarm is started, so that the monitoring and early warning of an underground building anti-floating system are realized.
(2) The invention realizes the dynamic change of the gravity of the underground building by additionally arranging the self-balancing water tank, thereby realizing the dynamic balance of the buoyancy of the underground water and the gravity of the underground building, and solving the anti-floating problem of the underground building in time, in particular to a method for pumping the underground water to the reserved self-balancing water tank after the alarm condition appears, lowering the underground water, lightening the buoyancy, increasing the counter weight of the building, closing the pumping device after the alarm condition disappears, stopping pumping water, realizing the long-term balance stability of the buoyancy and the gravity of the building, and further solving the uncontrollable anti-floating problem.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a layout diagram of the stress strain sensor on the prestressed anti-floating anchor rod in the invention.
Fig. 3 is a control relationship diagram between the pumping automation remote control module and the groundwater level sensor, the stress strain sensor and the pumping device in the invention.
Reference numerals: the method comprises the following steps of 1-ground structure, 2-waterproof sealing layer, 3-underground structure top plate, 4-overflow pipe, 5-underground structure wall plate, 6-flexible sealing waterproof layer, 7-composite vacuum waterproof and drainage integrated plate, 8-underground structure bottom plate, 9-grouting pipeline, 10-prestress anti-floating anchor rod, 11-waterproof geotextile layer, 12-drainage pipe, 13-connecting pipe, 14-water pumping device, 15-water collecting tank, 16-water filtering layer, 17-water pumping pipe, 18-self-balancing water tank, 19-underground water level sensor, 20-water level observation pipe and 21-stress strain sensor.
Detailed Description
As shown in fig. 1 to 3, the underground building system with anti-floating monitoring and self-correcting functions comprises an underground structure top plate 3, an underground structure bottom plate 8, an underground structure wall plate 5 connected between the underground structure top plate 3 and two sides of the underground structure bottom plate 8, and a ground structure 1 arranged on the top of the underground structure top plate 3; the water level monitoring device also comprises a flexible sealing waterproof layer 6, a composite vacuum waterproof and drainage integrated plate 7, a water filtering layer 16, a water collecting tank 15, a water level observation pipe 20 and a pumping automation remote control module; a self-balancing water tank 18 is arranged inside the top plate 3 of the underground structure along the transverse through length; the flexible sealing waterproof layer 6 is laid on the outer walls of the underground structure top plate 3, the underground structure wall plate 5 and the underground structure bottom plate 8; the composite vacuum waterproof and drainage integrated plate 7 is laid on the outer side of the flexible sealing waterproof layer 6, and a waterproof geotextile layer 11 is laid on the outer side of the composite vacuum waterproof and drainage integrated plate 7; the water filtering layer 16 is arranged on the outer side of the periphery of the underground structure wall plate 5 and is attached to the outer surface of the waterproof geotextile layer 11, and the drain pipe 12 is arranged at the lower part of the water filtering layer 16 along the longitudinal length; the water collecting tank 15 is arranged below two sides of the underground structure bottom plate 8, and the top of the water collecting tank 15 is higher than the bottom surface of the water filtering layer 16; the water collecting tank 15 is communicated with the drain pipe 12 through a connecting pipe 13; a water pumping device 14 is fixed in the water collecting tank 15; the output end of the pumping device 14 is connected with a pumping pipe 17, and the upper end of the pumping pipe 17 is communicated with a self-balancing water tank 18; water level observation pipes 20 are fixed at the inner corner positions of the underground structural wall plates 5; the lower end of the water level observation pipe 20 extends into the soil below the underground structure bottom plate 8, and underground water level sensors 19 are fixed on the side walls of the water level observation pipe 20; grouting pipelines 9 are arranged on the underground structure bottom plate 8 and the underground structure wall plate 5 at intervals, and prestressed anti-floating anchor rods 10 are pre-buried in the underground structure bottom plate 8; the upper end of the prestressed anti-floating anchor rod 10 exceeds the top of the underground structure bottom plate 8, and the lower end of the prestressed anti-floating anchor rod 10 is anchored in soil; stress-strain sensors 21 are respectively arranged on two sides of the prestressed anti-floating anchor rod; the pumping automation remote control module is respectively in signal connection with the stress strain sensor 21 and the underground water level sensor 19 and processes the received data of the stress strain sensor 21 and the data of the underground water level sensor 19; the water pumping automation remote control module is connected with the water pumping device 14 and controls the on-off of the water pumping device 14 according to the processed data.
In this embodiment, the water filtering layer 16 is disposed outside the waterproof geotextile layer 11.
In this embodiment, a waterproof sealing layer 2 is laid on the inner surface of the self-balancing water tank 18.
In this embodiment, an overflow pipe 4 is fixed to the top of the self-balancing water tank 18, and the top of the overflow pipe 4 extends to the upper side of the ground structure 1.
In this embodiment, the water pumping device 14 is provided with an automatic switching device, and the automatic remote control module controls the on/off of the water pumping device 14 by controlling the automatic switching device.
In this embodiment, the water pumping device 14 is provided with a manual switch device; the underground building system with the anti-floating monitoring and self-correcting functions further comprises an alarm device; the alarm device is in signal connection with the pumping automation remote control module and is used for giving an alarm through the alarm device after an alarm condition occurs; after receiving the alarm, the field personnel can adopt a manual switch device to open and close the water pumping device 14.
In this embodiment, the underground building system with anti-floating monitoring and self-correcting functions further comprises a cloud processing platform, and the water pumping automation remote control module is in signal connection with the cloud processing platform, and is used for transmitting the monitoring data of the stress strain sensor 21 and the underground water level sensor 19 to the cloud processing platform in real time and performing water pumping remote control according to the instruction of the cloud processor platform; or the underground building system with the anti-floating monitoring and self-correcting functions further comprises a plurality of clients, and the pumping automation remote control module is in signal connection with the clients and is used for transmitting the monitoring data to the clients in real time and performing pumping remote control according to instructions of the clients.
The construction method of the underground building system with the anti-floating monitoring and self-correcting functions comprises the following steps.
And S1, forming holes at the positions of the water level observation pipe 20 and the prestressed anti-floating anchor rod 10 on the bottom surface of the foundation pit according to the design requirements of the prestressed anti-floating anchor rod 10 and the water level observation pipe 20.
And S2, laying waterproof geotextile at the bottom below the underground building to be constructed.
And S3, paving the composite vacuum waterproof and drainage integrated plate 7 at the bottom of the underground building to be constructed on the waterproof geotextile below the underground building to be constructed according to the position requirements of the prestressed anti-floating anchor rods 10 and the water level observation pipe 20.
And S4, installing a hole forming pipe at the hole forming position of the prestressed anti-floating anchor rod 10.
And S5, welding and forming the composite vacuum waterproof and drainage integrated plate 7, the concrete forming pipe and the water level observation pipe 20 which are positioned at the bottom of the underground building to be constructed.
And S6, installing a grouting pipeline 9.
And S7, pouring the underground structure bottom plate 8, the underground structure wall plate 5 and the underground structure top plate 3.
S8, after the underground structure wall plate 5 and the underground structure top plate 3 meet the strength requirement, installing the composite vacuum waterproof and drainage integrated plate 7 on the outer side of the underground structure wall plate and the underground structure top plate 3, and paving the waterproof geotextile on the lateral side on the outer side of the composite vacuum waterproof and drainage integrated plate 7 to form the composite vacuum waterproof and drainage integrated plate 7 and the waterproof geotextile layer 11 which wrap the underground building in an all-around manner.
And S9, after the underground structure bottom plate 8 meets the strength requirement, the hole forming pipe is removed, the prestress anti-floating anchor rod 10 is installed, and the structure strain sensor system including the stress strain sensor 21 is installed.
And S10, installing the structural anti-floating treatment system.
S1001, according to the design position requirements of the water collecting tank 15 and the water discharging pipe 12, the water discharging pipe 12 is laid on the periphery of the building main body, the water collecting tank 15 is installed, and the water discharging pipe 12 and the water collecting tank 15 are connected through the connecting pipe 13.
S1002, a water pumping pipe 17 is arranged inside the water collecting tank 15, and a water pumping device 14 and a water pumping automation control module are arranged at the lower end of the water pumping pipe 17.
S1003, constructing a self-balancing water tank 18, and connecting the upper end of the water pumping pipe 17 with the self-balancing water tank 18.
And S11, backfilling drainage and filtration graded sand outside the waterproof geotextile layer 11 positioned on the wall and in the middle of the soil to form a water filtration layer 16, and constructing the upper surface of the waterproof geotextile layer 11 positioned on the top of the underground building through the ground structure 1 to form a ground structure on the top.
S12, respectively setting a grouting pipeline 9 penetrating through the underground structure bottom plate 8 and a grouting pipeline 9 penetrating through the underground structure wall plate 5 according to design requirements, and injecting flexible waterproof materials into the gaps between the underground structure bottom plate 8 and the composite vacuum water-proof and drainage integrated plate 7 and the gaps between the underground structure wall plate 5 and the composite vacuum water-proof and drainage integrated plate 7 in a high-pressure split mode to form a flexible sealing waterproof layer 6.
S13, installing the ground water level sensor 19 at the designed water level height of the water level observation pipe 20.
And S14, the water level sensor, the stress-strain sensor and the water pumping device 14 are respectively in signal connection with the water pumping remote automation control module, and threshold values for opening and closing the water pumping device 14 are set for monitoring data transmitted to the water pumping automation remote control module by the stress-strain sensor 21 and the underground water level sensor 19.
And S15, stopping precipitation by the precipitation well, and checking and accepting the waterproof system.
And S16, carrying out system debugging of the water pumping automation remote control module with the anti-floating real-time monitoring and self-correcting functions of the underground building system.
And S17, delivering the underground building system for use after the underground building system meets the processing requirements of anti-floating real-time monitoring and self-correcting functions.
In this embodiment, in step S2, if the bottom of the foundation pit is provided with a concrete cushion, the concrete cushion is constructed first, and then waterproof geotextile is laid on the concrete cushion.
In this embodiment, after the construction of the self-balancing water tank 18 is completed, the overflow pipe 4 is installed on the top of the self-balancing water tank 18, and the waterproof sealing layer 2 is constructed on the inner surface of the self-balancing water tank 18.
In this embodiment, when the underground building system with the anti-floating monitoring and self-repairing functions is provided with the alarm device, the step S14 further includes signal-connecting the alarm device with the pumping remote automatic control module, and setting a threshold value for turning on and off the alarm device for monitoring data transmitted from the stress strain sensor 21 and the ground water level sensor 19 to the pumping remote automatic control module.
In this embodiment, the requirement of the water pumping automation remote control module in step S16 is as follows:
(a) monitoring water level data of the water level observation pipe 20 in real time, monitoring stress and strain data of the prestressed anti-floating anchor rod 10 in real time, and automatically starting an alarm device and a water pumping device 14 when the monitored data exceed a preset threshold value;
(b) when the monitoring data is lower than the preset threshold value, the alarm device and the water pumping device 14 are automatically closed;
(c) the pumping automation remote control module takes underground building areas as units, the buoyancy of underground water is consistent in the same underground building area, the underground water is pumped to the same self-balancing water tank 18, the buoyancy of the underground water is different in the areas, and the pumping automation remote control module independently controls the corresponding underground building areas.
In this embodiment, the top surface of the underground structure roof 3 is flush with the ground.
In this embodiment, the bottom end of the water level observation pipe 20 penetrates through the underground structural bottom plate 8, the composite vacuum waterproof and drainage integrated plate 7, and the waterproof geotextile layer 11.
In this embodiment, the prestressed anti-floating anchor 10 penetrates the composite vacuum waterproof and drainage integrated plate 7 and the waterproof geotextile layer 11.
The working process of the invention is as follows: when the self-balancing water tank is used, the change condition of the underground water level is monitored in real time through the underground water level sensor 19, meanwhile, the stress change condition of the pre-stressing anti-floating anchor rod 10 is monitored in real time through the stress strain sensor 21, when the underground water level rises, the underground water level sensor 19 is triggered or buoyancy is increased due to the rise of the underground water level, the stress of the pre-stressing anti-floating anchor rod 10 changes, when the stress change exceeds a threshold value set by the stress strain sensor 21, an alarm is started, so that timely alarm operation can be realized, the water pumping device 14 is started at the moment, water in the water collecting tank 15 is pumped into the self-balancing water tank 18, underground water is lowered, buoyancy is relieved, the building counterweight is increased, after the alarm condition disappears, the water pumping device 14 is closed, water pumping is stopped.
The above embodiments are not intended to be exhaustive or to limit the invention to other embodiments, and the above embodiments are intended to illustrate the invention and not to limit the scope of the invention, and all applications that can be modified from the invention are within the scope of the invention.
Claims (10)
1. An underground building system with anti-floating monitoring and self-correcting functions comprises an underground structure top plate (3), an underground structure bottom plate (8), an underground structure wall plate (5) connected between the underground structure top plate (3) and two sides of the underground structure bottom plate (8), and a ground structure (1) arranged at the top of the underground structure top plate (3); the method is characterized in that: the water level monitoring device also comprises a flexible sealing waterproof layer (6), a composite vacuum waterproof and drainage integrated plate (7), a water filtering layer (16), a water collecting tank (15), a water level observation pipe (20) and a water pumping automatic remote control module; a self-balancing water tank (18) is arranged inside the top plate (3) of the underground structure along the transverse through length; the flexible sealing waterproof layer (6) is laid on the outer walls of the underground structure top plate (3), the underground structure wall plate (5) and the underground structure bottom plate (8); the composite vacuum waterproof and drainage integrated plate (7) is laid on the outer side of the flexible sealing waterproof layer (6), and a waterproof geotextile layer (11) is laid on the outer side of the composite vacuum waterproof and drainage integrated plate (7); the water filtering layer (16) is arranged on the outer side of the periphery of the underground structure wallboard (5) and is attached to the outer surface of the waterproof geotextile layer (11), and a drain pipe (12) is arranged at the lower part of the water filtering layer (16) along the longitudinal length; the water collecting tank (15) is arranged below the outer side of the underground structure bottom plate (8), and the top of the water collecting tank (15) is higher than the bottom surface of the water filtering layer (16); the water collecting tank (15) is communicated with the drain pipe (12) through a connecting pipe (13); a water pumping device (14) is fixed in the water collecting tank (15); the output end of the water pumping device (14) is connected with a water pumping pipe (17), and the upper end of the water pumping pipe (17) is communicated with a self-balancing water tank (18); water level observation pipes (20) are fixed at the inner corner positions of the underground structure wall plates (5); the lower end of the water level observation pipe (20) extends into soil below the underground structure bottom plate (8), and underground water level sensors (19) are fixed on the side walls of the water level observation pipe (20); grouting pipelines (9) are arranged on the underground structure bottom plate (8) and the underground structure wall plate (5) at intervals, and prestressed anti-floating anchor rods (10) are pre-buried in the underground structure bottom plate (8); the upper end of the prestressed anti-floating anchor rod (10) exceeds the top of the underground structure bottom plate (8), and the lower end of the prestressed anti-floating anchor rod (10) is anchored in soil; stress-strain sensors (21) are respectively arranged on two sides of the prestressed anti-floating anchor rod (10); the water pumping automation remote control module is respectively in signal connection with the stress strain sensor (21) and the underground water level sensor (19), and processes the received data of the stress strain sensor (21) and the data of the underground water level sensor (19); the water pumping automation remote control module is connected with the water pumping device (14) and controls the opening and closing of the water pumping device (14) according to the processed data.
2. An underground building system with anti-floating monitoring and self-correcting functions according to claim 1, characterized in that: and a waterproof sealing layer (2) is laid on the inner surface of the self-balancing water tank (18).
3. An underground building system with anti-floating monitoring and self-correcting functions according to claim 1, characterized in that: an overflow pipe (4) is fixed at the top of the self-balancing water tank (18), and the top of the overflow pipe (4) extends to the upper part of the ground structure (1).
4. An underground building system with anti-floating monitoring and self-correcting functions according to claim 1, characterized in that: the water pumping device (14) is provided with an automatic switching device, and the automatic remote control module for water pumping controls the on-off of the water pumping device (14) by controlling the automatic switching device.
5. An underground building system with anti-floating monitoring and self-correcting functions according to claim 1, characterized in that: the water pumping device (14) is provided with a manual switch device; the underground building system with the anti-floating monitoring and self-correcting functions further comprises an alarm device; the alarm device is in signal connection with the pumping automation remote control module and is used for giving an alarm through the alarm device after an alarm condition occurs; after receiving the alarm, the field personnel can adopt a manual switch device to open and close the water pumping device (14).
6. A method of constructing an underground construction system according to any one of claims 1 to 5, comprising the steps of:
s1, forming holes at the positions of the water level observation pipe (20) and the prestressed anti-floating anchor rod (10) on the bottom surface of the foundation pit according to the design requirements of the prestressed anti-floating anchor rod (10) and the water level observation pipe (20);
s2, laying waterproof geotextile at the bottom below the underground building to be constructed;
s3, paving a composite vacuum waterproof and drainage integrated plate (7) positioned at the bottom of the underground building to be constructed on the waterproof geotextile below the underground building to be constructed according to the position requirements of the prestressed anti-floating anchor rods (10) and the water level observation pipes (20);
s4, mounting a hole forming pipe at the hole forming position of the prestressed anti-floating anchor rod (10);
s5, welding and forming the composite vacuum waterproof and drainage integrated plate (7), the concrete forming pipe and the water level observation pipe (20) which are positioned at the bottom of the underground building to be constructed;
s6, installing a grouting pipeline (9);
s7, pouring an underground structure bottom plate (8), an underground structure wall plate (5) and an underground structure top plate (3);
s8, after the underground structure wall plate (5) and the underground structure top plate (3) meet the strength requirement, installing a composite vacuum waterproof and drainage integrated plate (7) on the outer side of the underground structure wall plate and the underground structure top plate, and paving waterproof geotextile on the lateral side on the outer side of the composite vacuum waterproof and drainage integrated plate (7) to form a composite vacuum waterproof and drainage integrated plate (7) and a waterproof geotextile layer (11) which wrap the underground building in an all-around manner;
s9, after the underground structure bottom plate (8) meets the strength requirement, the hole forming pipe is dismantled, the prestress anti-floating anchor rod (10) is installed, and the structure strain sensor system including the stress strain sensor (21) is installed;
s10, mounting the structural anti-floating treatment system:
s1001, laying a drain pipe (12) and installing a water collecting tank (15) on the periphery of a building main body according to the position requirements of the design of the water collecting tank (15) and the drain pipe (12), and connecting the drain pipe (12) and the water collecting tank (15) through a connecting pipe (13);
s1002, a water pumping pipe (17) is arranged inside the water collecting tank (15), and a water pumping device (14) and a water pumping automatic control module are arranged at the lower end of the water pumping pipe (17);
s1003, constructing a self-balancing water tank (18), and connecting the upper end of the water pumping pipe (17) with the self-balancing water tank (18);
s11, backfilling drainage and filtration graded sand outside the waterproof geotechnical cloth layer (11) on the wall and in the middle of soil to form a water filtration layer (16), and constructing the upper surface of the waterproof geotechnical cloth layer (11) on the top of the underground building through the ground structure (1) to form a ground structure on the top;
s12, respectively arranging a grouting pipeline (9) penetrating through an underground structure bottom plate (8) and a grouting pipeline (9) penetrating through an underground structure wall plate (5) according to design requirements, and injecting flexible waterproof materials into a gap between the underground structure bottom plate (8) and the composite vacuum waterproof and drainage integrated plate (7) and a gap between the underground structure wall plate (5) and the composite vacuum waterproof and drainage integrated plate (7) at high pressure in a middle area to form a flexible sealing waterproof layer (6);
s13, installing an underground water level sensor (19) at the designed water level height of the water level observation pipe (20);
s14, respectively connecting the water level sensor, the stress strain sensor and the water pumping device (14) with the water pumping remote automation control module through signals, and setting a threshold value for opening and closing the water pumping device (14) for monitoring data transmitted to the water pumping remote automation control module by the stress strain sensor (21) and the underground water level sensor (19);
s15, stopping dewatering by the dewatering well, and checking and accepting the waterproof system;
s16, carrying out system debugging of the water pumping automation remote control module with anti-floating real-time monitoring and self-correcting functions of the underground building system;
and S17, delivering the underground building system for use after the underground building system meets the processing requirements of anti-floating real-time monitoring and self-correcting functions.
7. A method of constructing an underground construction system according to claim 6, wherein: in the step S2, if a concrete cushion is provided at the bottom of the foundation pit, the concrete cushion is constructed first, and then waterproof geotextile is laid on the concrete cushion.
8. A method of constructing an underground construction system according to claim 6, wherein: after the construction of the self-balancing water tank (18) is completed, an overflow pipe (4) is installed at the top of the self-balancing water tank (18), and a waterproof sealing layer (2) is constructed on the inner surface of the self-balancing water tank (18).
9. A method of constructing an underground construction system according to claim 6, wherein: when the underground building system with the anti-floating monitoring and self-correcting functions is provided with the alarm device, the step S14 further comprises the step of connecting the alarm device with the pumping remote automatic control module through signals, and setting a threshold value for starting and stopping the alarm device for monitoring data transmitted to the pumping automatic remote control module by the stress strain sensor (21) and the underground water level sensor (19).
10. A method of constructing an underground construction system according to claim 9, wherein: the requirement of the water pumping automation remote control module in the step S16 is that:
(a) monitoring water level data of the water level observation pipe (20) in real time, monitoring stress strain data of the prestressed anti-floating anchor rod (10) in real time, and automatically starting an alarm device and a water pumping device (14) when the monitored data exceed a preset threshold value;
(b) when the monitoring data is lower than a preset threshold value, the alarm device and the water pumping device (14) are automatically closed;
(c) the pumping automation remote control module takes underground building areas as units, the buoyancy of underground water is consistent in the same underground building area, the underground water is pumped to the same self-balancing water tank (18), the buoyancy of the underground water is different in the areas, and the pumping automation remote control module independently controls the corresponding underground building areas.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115233694A (en) * | 2022-08-20 | 2022-10-25 | 广州市岩土勘测设计有限公司 | Anti-floating flexible combined support for foundation pit and construction method thereof |
| CN115389182A (en) * | 2022-08-17 | 2022-11-25 | 武汉地铁集团有限公司 | Simulation test device for measuring buoyancy of bottom plate of underground station, installation method and test method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115389182A (en) * | 2022-08-17 | 2022-11-25 | 武汉地铁集团有限公司 | Simulation test device for measuring buoyancy of bottom plate of underground station, installation method and test method |
| CN115233694A (en) * | 2022-08-20 | 2022-10-25 | 广州市岩土勘测设计有限公司 | Anti-floating flexible combined support for foundation pit and construction method thereof |
| CN115233694B (en) * | 2022-08-20 | 2023-10-13 | 广州市岩土勘测设计有限公司 | Anti-floating flexible combined support for foundation pit and construction method thereof |
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