Building base anti-floating monitoring and preventing device

Abstract

The invention provides a building base anti-floating monitoring and preventing device, and relates to the technical field of building construction, the building base anti-floating monitoring and preventing device comprises a support and a foundation, a foundation pit is excavated on the ground, the support is erected on the periphery of the inner wall of the foundation pit, and the foundation is erected on the support; a water injection and drainage system is arranged at the bottom in the foundation pit and used for balancing the water pressure difference between the two sides of the bottom of the foundation. A monitoring assembly is arranged on the support or the foundation and comprises a plurality of horizontal displacement sensors, vertical displacement sensors and tilt angle sensors, and the horizontal displacement sensors, the vertical displacement sensors and the tilt angle sensors are all installed on the support or the foundation. The method has the beneficial effects that the problems that in the construction process, the highest anti-floating design water level is difficult to determine, the cost is high, but the foundation bottom plate is prone to floating and damage due to insufficient anti-floating measures, and economy and safety are difficult to coordinate are effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a building base anti-floating monitoring and prevention device. Background Art

[0002] With the development of cities, building designs continue to extend downwards, and with the optimization of structural design, the weight of the overall structure becomes lighter, which puts higher requirements on anti-floating measures for groundwater. For buildings near water areas, it is difficult for geological survey personnel to monitor the groundwater level after the excavation of the foundation pit, and the anti-floating water level design is difficult. Designers mainly consider the anti-floating design under normal use of the building. The anti-floating during the construction process requires the construction unit to consider additional anti-floating measures. When entering the plum rain season, the groundwater level rises rapidly due to the influx of surface water. The highest anti-floating design water level during the construction process is difficult to determine and the cost is high. However, insufficient anti-floating measures can easily lead to floating damage to the foundation slab, making it difficult to coordinate economy and safety. In order to optimize such problems, a building base anti-floating monitoring and prevention device is now invented to solve the above problems. Summary of the invention

[0003] In view of the above-mentioned technical problems existing in the prior art, a building base anti-floating monitoring and prevention device is provided, which effectively solves the problem that the highest anti-floating design water level is difficult to determine and the cost is high during the construction process, but insufficient anti-floating measures can easily lead to floating and damage of the foundation slab, making it difficult to coordinate economy and safety.

[0004] The purpose and effect of the present invention are achieved by the following specific technical means:

[0005] A building base anti-floating monitoring and prevention device comprises a support and a foundation, a foundation pit is excavated on the ground, the support is set up around the inner wall of the foundation pit, and the foundation is built on the support;

[0006] The bottom of the foundation pit is provided with an injection and drainage system, which is used to balance the water pressure difference on both sides of the foundation bottom;

[0007] A monitoring component is provided on the support or foundation, and the monitoring component includes a plurality of horizontal displacement sensors, vertical displacement sensors and inclination sensors, and the horizontal displacement sensors, vertical displacement sensors and inclination sensors are all installed on the support or foundation;

[0008] An edge computing gateway and a controller are provided outside the foundation. The edge computing gateway is used for data processing of water level sensors, horizontal displacement sensors, vertical displacement sensors and inclination sensors. The edge computing gateway is electrically connected to the controller.

[0009] A further preferred solution: the injection and drainage system includes a pressure relief well excavated at the bottom of the foundation pit, a circulating water pool excavated next to the foundation, and a two-way suction assembly installed on the foundation. The top of the pressure relief well is sealed with a manhole cover. One end of the two-way suction assembly penetrates the foundation and the manhole cover and extends into the pressure relief well, and the other end extends into the circulating water pool. A water level sensor is installed in the end of the two-way suction assembly extending into the pressure relief well.

[0010] A further preferred solution: the two-way suction assembly includes a water pipe and a two-way water pump. The water pipe is fixed on the foundation, and one end of the water pipe penetrates the foundation and the manhole cover and extends into the pressure relief well, and the other end extends into the circulating water pool. The two-way water pump is installed on the water pipe.

[0011] A further preferred solution is that the manhole cover is made of galvanized steel plate, the water pipe is made of steel pipe, the manhole cover and the water pipe are seamlessly welded, one end of the water pipe extends to 500 mm from the bottom of the foundation pit, and the top end extends to 200 mm above the foundation.

[0012] A further preferred solution is that the lower part of the pressure relief well is filled with crushed stone aggregate, and the thickness of the crushed stone aggregate is 8 mm to 20 mm.

[0013] A further preferred solution is that the crushed stone aggregate is wrapped with a filter cloth, and the water permeability of the filter cloth is ≥ 0.25 liters / (square meter·second).

[0014] A further preferred solution is that the monitoring point of the monitoring component is set at a position where the internal force and deformation characteristics of the support are significant or on the foundation slab.

[0015] A further preferred solution is as follows: a plurality of interconnected installation grooves are provided at the junction of the support and the foundation, and elastic support members are installed in each of the installation grooves.

[0016] A further preferred solution: the elastic support member includes an annular steel pipe, a spring shaft and a steel chain, the annular steel pipe is provided with two and respectively fixed in the two interconnected installation grooves, the spring shaft is fixed in the two interconnected installation grooves and surrounded by the two annular steel pipes, the steel chain is provided with a plurality of and evenly fixed between the two annular steel pipes, and two obliquely distributed springs are fixed on both sides of the steel chain, and the ends of the springs are fixed on the adjacent annular steel pipes.

[0017] A further preferred solution: the controller is remotely connected to a terminal device.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This kind of building base anti-floating monitoring and prevention device has an adaptive adjustment mechanism that can inject and drain water from the bottom of the foundation according to actual conditions to balance the water pressure difference on both sides of the bottom of the foundation, thereby reducing the impact of buoyancy on the building;

[0020] Horizontal displacement sensors, vertical displacement sensors and inclination sensors monitor the horizontal displacement, vertical displacement and inclination of the support or foundation in real time. By analyzing the data through the edge computing gateway, potential buoyancy problems can be predicted and corresponding measures can be taken in time to effectively prevent buoyancy from causing adverse effects on the support and foundation. The real-time data obtained by the controller will be transmitted to the terminal device through electrical signals so that the staff can understand the building base situation in a timely manner.

[0021] Therefore, it can effectively solve the problem that the highest anti-floating design water level is difficult to determine and the cost is high during the construction process, but insufficient anti-floating measures can easily lead to floating and damage of the foundation slab, making it difficult to coordinate economy and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall front cross-sectional structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 Schematic diagram of the structure in which the monitoring components are installed on the foundation;

[0024] Figure 3 For the present invention Figure 1 Schematic diagram of the local structure at A;

[0025] Figure 4 For the present invention Figure 1 Schematic diagram of the local structure at B;

[0026] Figure 5 It is a schematic diagram of the front view structure of the elastic support member of the present invention;

[0027] Figure 6 It is a schematic diagram of the front structural view of the elastic support member (excluding the spring shaft) of the present invention.

[0028] Markings in the figure: support 1, foundation 2, pressure relief well 3, crushed stone aggregate 4, water pipe 5, water level sensor 6, bidirectional water pump 7, circulating water pool 8, edge computing gateway 9, controller 10, terminal equipment 11, horizontal displacement sensor 12, vertical displacement sensor 13, inclination sensor 14, installation groove 15, elastic support 16, annular steel pipe 161, spring shaft 162, steel chain 163, spring 164, foundation pit 17, manhole cover 18. DETAILED DESCRIPTION

[0029] See also Figure 1-6 , further illustrate the embodiments of the present invention;

[0030] A building base anti-floating monitoring and prevention device comprises a support 1 and a foundation 2. A foundation pit 17 is excavated on the ground, the support 1 is set up around the inner wall of the foundation pit 17, and the foundation 2 is built on the support 1;

[0031] An injection and drainage system is provided at the bottom of the foundation pit 17, and the injection and drainage system is used to balance the water pressure difference on both sides of the bottom of the foundation 2 to reduce the impact of buoyancy on the building; the injection and drainage system specifically includes a pressure relief well 3 excavated at the bottom of the foundation pit, a circulating water pool 8 excavated next to the foundation 2, and a two-way suction assembly installed on the foundation 2. The top of the pressure relief well 3 is sealed with a well cover 18, and the bottom of the pressure relief well 3 is filled with crushed stone aggregate 4, and the thickness of the crushed stone aggregate 4 is 8mm to 20mm. The outside of the crushed stone aggregate 4 is wrapped with a filter cloth, and the water permeability of the filter cloth is ≥0.25 liters / square meter·second. The crushed stone aggregate 4 serves as a filter material in the pressure relief well 3, which can effectively allow water to pass through and block soil particles. This can not only maintain the fluidity of water in the pressure relief well 3, but also prevent the surrounding soil from being washed into the pressure relief well 3. In addition, the crushed stone aggregate 4 also has good bearing capacity and stability, and can be used as a supporting material for the well wall to help maintain the structural integrity of the pressure relief well 3. When the well wall is subjected to external pressure, the crushed stone aggregate 4 can disperse the pressure and reduce the concentration of pressure on a single area, thereby avoiding the collapse or deformation of the well wall. The main reason for wrapping the crushed stone aggregate 4 with filter cloth is to prevent soil particles from entering the two-way suction assembly, thereby maintaining smooth drainage and preventing blockage; one end of the two-way suction assembly penetrates the foundation 2 and the well cover 18 and extends into the pressure relief well 3, and the other end extends into the circulating water pool 8. A water level sensor 6 is installed in the end of the two-way suction assembly extending into the pressure relief well 3. The water level sensor 6 is used to test the water level in the pressure relief well 3. When the buoyancy at the bottom of the foundation 2 exceeds When the foundation 2 is under its own weight, the water level in the pressure relief well 3 will rise, and the water in the pressure relief well 3 will be pumped into the circulating water pool 8 by a two-way suction assembly, thereby reducing the buoyancy on the bottom of the foundation 2; if the buoyancy on the bottom of the foundation 2 exceeds its own weight, the water level in the pressure relief well 3 will drop, and the water in the circulating water pool 8 will be pumped back into the pressure relief well 3 by a two-way suction assembly to increase groundwater and avoid excessive settlement of the foundation 2 due to lack of water, effectively solving the problem that the highest anti-floating design water level is difficult to determine and the cost is high during the construction process, but insufficient anti-floating measures are likely to cause the foundation bottom plate to float and break, and it is difficult to coordinate economy and safety;

[0032] The two-way suction assembly specifically includes a water pipe 5 and a two-way water pump 7. The water pipe 5 is fixed on the foundation 2, and one end of the water pipe 5 penetrates the foundation 2 and the manhole cover 18 and then extends into the pressure relief well 3, and the other end extends into the circulating water pool 8. The two-way water pump 7 is installed on the water pipe 5. The two-way water pump 7 can realize two-way transportation of water, so as to inject or drain water into the pressure relief well 3 through the two-way suction assembly. In order to make the manhole cover 18 and the water pipe 5 more durable, the manhole cover 18 is preferably a galvanized steel plate, and the water pipe 5 is preferably a steel pipe. The manhole cover 18 and the water pipe 5 are seamlessly welded to prevent unfiltered groundwater above the manhole cover 18 from entering the water pipe 5. One end of the water pipe 5 extends to 500 mm from the bottom of the foundation pit 17, and the top extends to 200 mm above the foundation 2.

[0033] A monitoring component is provided on the support 1 or the foundation 2, and the monitoring component includes a plurality of horizontal displacement sensors 12, vertical displacement sensors 13 and inclination sensors 14. The horizontal displacement sensors 12, vertical displacement sensors 13 and inclination sensors 14 are all installed on the support 1 or the foundation 2, and are respectively used to test the horizontal displacement, vertical displacement and inclination angle of multiple sites on the support 1, so as to reflect the stress conditions of multiple sites on the support 1 or the foundation 2 in real time. The monitoring points of the monitoring component are set at positions where the internal force and deformation characteristics of the support 1 are significant or at the bottom plate of the foundation 2. For example, monitoring points should be set on the support 1 for rods that support large internal forces or play a controlling role, so as to grasp the stress state of the support 1 in real time; in sections with complex geological conditions, the number of monitoring points should be increased to fully reflect the stability of the support 1 and the foundation pit 17; the horizontal and vertical displacement monitoring points at the top of the slope of the foundation pit 17 should be arranged along the periphery of the foundation pit, especially in the middle of the periphery, at the positive corners and other key positions, so as to conduct a comprehensive monitoring of the anti-floating of the building base, such as Figure 1 As shown, the monitoring component is installed on the support 1, which is suitable for temporary monitoring during the foundation pit excavation process and can help construction personnel to understand the safety status of the support structure in a timely manner; Figure 2 As shown, when the monitoring component is installed on the bottom plate of the foundation 2, it is suitable for buildings that require high stability at the bottom of the foundation 2, such as high-rise buildings or underground structures.

[0034] A plurality of interconnected mounting grooves 15 are provided at the junction of the support 1 and the foundation 2, and elastic support members 16 are installed in each of the mounting grooves 15. The elastic support members 16 include an annular steel pipe 161, a spring shaft 162 and a steel chain 163. Two annular steel pipes 161 are provided and are respectively fixed in two interconnected mounting grooves 15. The spring shaft 162 is fixed in two interconnected mounting grooves 15 and is surrounded by two annular steel pipes 161. A plurality of steel chains 163 are provided and are evenly fixed between the two annular steel pipes 161, and two obliquely distributed springs 164 are fixed on both sides of the steel chain 163. The ends of the springs 164 are fixed on adjacent annular steel pipes 161. The setting of the elastic support members 16 can provide additional support force when the bottom of the foundation 2 is subjected to buoyancy, thereby ensuring the safety and stability of the building.

[0035] An edge computing gateway 9 and a controller 10 are provided outside the foundation 2. The edge computing gateway 9 is used for data processing of the water level sensor 6, the horizontal displacement sensor 12, the vertical displacement sensor 13 and the inclination sensor 14. The edge computing gateway 9 is electrically connected to the controller 10. The controller 10 is remotely connected to a terminal device 11, which is a computer or a mobile phone.

[0036] Working principle: The water level range of the water level sensor 6 is preset through the controller 10, as well as the horizontal displacement range of the horizontal displacement sensor 12, the vertical displacement range of the vertical displacement sensor 13 and the inclination range of the inclination sensor 14. The groundwater will penetrate into the support 1, the foundation 2 and the pressure relief well 3. Several horizontal displacement sensors 12, vertical displacement sensors 13 and inclination sensors 14 on the support 1 will respectively test the horizontal displacement, vertical displacement and inclination angle of multiple locations on the support 1 or the foundation 2. At the same time, the water level sensor 6 in the water pipe 5 will test the water level in the pressure relief well 3. The edge computing gateway 9 will pre-process, screen and analyze the data measured by the water level sensor 6, the horizontal displacement sensor 12, the vertical displacement sensor 13 and the inclination sensor 14 to reduce the data transmission volume and response time, and improve the data processing efficiency. Finally, these data will be transmitted to the controller 10;

[0037] If the water level value measured by the water level sensor 6 is within the preset range, it means that the groundwater has little effect on the support 1 and the foundation 2, and the buoyancy of the foundation 2 is within the normal range;

[0038] If the water level value measured by the water level sensor 6 is greater than the preset maximum water level, the controller 10 will start the two-way water pump 7 to pump the groundwater in the pressure relief well 3 to the circulating water pool 8 through the water pipe 5 until the data measured by the water level sensor 6 is within the preset range, that is, the buoyancy of the foundation 2 is within the normal range, and then the two-way water pump 7 is turned off;

[0039] If the water level value measured by the water level sensor 6 is lower than the preset minimum water level, the controller 10 will start the two-way water pump 7, pump the water in the circulating water pool 8 to the pressure relief well 3 through the water pipe 5, and inject water into the pressure relief well 3 until the data measured by the water level sensor 6 is within the preset range, that is, the buoyancy of the foundation 2 is within the normal range, and then turn off the two-way water pump 7. Therefore, the adaptive adjustment mechanism of the device can inject and drain water from the bottom of the foundation 2 according to the actual situation to balance the water pressure difference on both sides of the bottom of the foundation 2, thereby reducing the impact of buoyancy on the building;

[0040] In the above process, the horizontal displacement sensor 12, the vertical displacement sensor 13 and the inclination sensor 14 will monitor the horizontal displacement, vertical displacement and inclination of the support 1 or the foundation 2 in real time. Through the edge computing gateway 9, the data analysis can predict potential buoyancy problems and take corresponding measures in time, which can effectively prevent the buoyancy from causing adverse effects on the support 1 and the foundation 2. The real-time data obtained by the controller 10 will be transmitted to the terminal device 11 through electrical signals, so that the staff can understand the building base situation in time;

[0041] When the support 1 and the foundation 2 are affected by buoyancy, they will be offset. At this time, the foundation 2 will drive the annular steel pipe 161 to move, and the steel chain 163 will be stretched or in a relaxed state. The spring 164 on the steel chain 163 will also undergo elastic deformation following the change of the steel chain 163 to counteract the influence of buoyancy on the support 1 and the foundation 2. In this process, the spring shaft 162 will also be stretched or compressed. Therefore, when the elastic support member 16 is used, it can provide additional support force when the bottom of the foundation 2 is affected by buoyancy, thereby achieving dynamic stability of the foundation 2 and improving the safety of the building.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A building base anti-floating monitoring and prevention device, comprising a support (1) and a foundation (2), wherein a foundation pit (17) is excavated on the ground, the support (1) is set up around the inner wall of the foundation pit (17), and the foundation (2) is built on the support (1), characterized in that: The bottom of the foundation pit (17) is provided with an injection and drainage system, and the injection and drainage system is used to balance the water pressure difference on both sides of the bottom of the foundation (2); A monitoring component is provided on the support (1) or the foundation (2), and the monitoring component includes a plurality of horizontal displacement sensors (12), vertical displacement sensors (13) and inclination sensors (14), and the horizontal displacement sensors (12), vertical displacement sensors (13) and inclination sensors (14) are all installed on the support (1) or the foundation (2); An edge computing gateway (9) and a controller (10) are provided outside the foundation (2); the edge computing gateway (9) is used for data processing of a water level sensor (6), a horizontal displacement sensor (12), a vertical displacement sensor (13) and an inclination sensor (14); and the edge computing gateway (9) is electrically connected to the controller (10).

2. A building base anti-floating monitoring and prevention device according to claim 1, characterized in that: The injection and drainage system comprises a pressure relief well (3) excavated at the bottom of a foundation pit, a circulating water pool (8) excavated beside a foundation (2), and a two-way suction component installed on the foundation (2); the top of the pressure relief well (3) is sealed with a well cover (18); one end of the two-way suction component penetrates the foundation (2) and the well cover (18) and then extends into the pressure relief well (3); the other end extends into the circulating water pool (8); a water level sensor (6) is installed in the end of the two-way suction component extending into the pressure relief well (3).

3. A building base anti-floating monitoring and prevention device according to claim 2, characterized in that: The bidirectional suction assembly comprises a water pipe (5) and a bidirectional water pump (7). The water pipe (5) is fixed on the foundation (2), and one end of the water pipe (5) penetrates the foundation (2) and the well cover (18) and then extends into the pressure relief well (3), while the other end extends into the circulating water pool (8). The bidirectional water pump (7) is installed on the water pipe (5).

4. The building base anti-floating monitoring and prevention device according to claim 3 is characterized in that: The manhole cover (18) is a galvanized steel plate, the water pipe (5) is a steel pipe, the manhole cover (18) and the water pipe (5) are seamlessly welded, one end of the water pipe (5) extends to 500 mm from the bottom of the foundation pit (17), and the top end extends to 200 mm above the foundation (2).

5. The building base anti-floating monitoring and prevention device according to claim 2 is characterized in that: The lower part of the pressure relief well (3) is filled with crushed stone aggregate (4), and the thickness of the crushed stone aggregate (4) is 8 mm to 20 mm.

6. The building base anti-floating monitoring and prevention device according to claim 4 is characterized in that: The crushed stone aggregate (4) is wrapped with a filter cloth, and the water permeability of the filter cloth is ≥ 0.25 liters / (square meter·second).

7. The building base anti-floating monitoring and prevention device according to claim 1 is characterized in that: The monitoring point of the monitoring component is arranged at a position where the internal force and deformation characteristics of the support (1) are significant or on the bottom plate of the foundation (2).

8. The building base anti-floating monitoring and prevention device according to claim 1 is characterized in that: A plurality of interconnected installation grooves (15) are provided at the junction of the support (1) and the foundation (2), and elastic support members (16) are installed in each of the installation grooves (15).

9. The building base anti-floating monitoring and prevention device according to claim 8, characterized in that: The elastic support member (16) comprises an annular steel pipe (161), a spring shaft (162) and a steel chain (163); the annular steel pipe (161) is provided with two and respectively fixed in two interconnected mounting grooves (15); the spring shaft (162) is fixed in two interconnected mounting grooves (15) and surrounded by the two annular steel pipes (161); the steel chain (163) is provided with a plurality of and evenly fixed between the two annular steel pipes (161); and two obliquely distributed springs (164) are fixed on both sides of the steel chain (163); the ends of the springs (164) are fixed on adjacent annular steel pipes (161).

10. The building base anti-floating monitoring and prevention device according to claim 1, characterized in that: The controller (10) is remotely connected to a terminal device (11).

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