Anti-floating monitoring drainage pressure relief system for basement bottom plate

Abstract

The utility model relates to the technical field of constructional engineering, in particular to a basement bottom plate anti-floating monitoring drainage pressure relief system which comprises a base soil layer, a building ground, a signal control terminal and a control circuit, a concrete bottom plate is arranged on the outer wall of the bottom end of the building ground, and a concrete cushion layer is arranged on the outer wall of the bottom end of the concrete bottom plate. A water collecting pit is formed in the outer wall of one side of the concrete cushion layer, an electric control water suction pump is installed on the inner wall of the water collecting pit, a second water pipe is inserted into the output end of the electric control water suction pump, a stop valve is installed on the inner wall of the bottom of the second water pipe, and a flow monitor is installed on the outer wall of the top of the second water pipe. A liquid level upper limit sensor is mounted on the inner wall of the top of the water collecting pit; the structure is simple in construction, convenient to operate and easy in quality control, and is matched with the reserved post-cast strip for synchronous construction, so that relevant hidden dangers of early stress cracking, water seepage and the like of bottom plate concrete due to the water pressure jacking effect of underground water are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of building engineering, in particular to a basement bottom plate anti-floating monitoring and drainage pressure relief system. Background Art

[0002] Conventional basement anti-floating design resists the buoyancy of groundwater by increasing the bearing capacity of the structural floor itself, or by using anti-floating anchors or anti-floating piles to increase the bearing capacity of the structural floor. The above conventional construction methods increase the construction cost or cause the construction period to increase, and the actual water level may be higher than the design water level, resulting in insufficient anti-floating of the basement floor, leading to damage to the basement floor structure.

[0003] After searching, the existing patent publication number is CN214245859U, which is a basement floor drain pressure relief device that can replace the conventional building basement anti-floating design, improve construction efficiency, has a simple and practical structure, saves costs, and reduces risks.

[0004] However, the above patent still has certain defects. It cannot guarantee the safety of the foundation pit construction stage of the underground project, the quality is not easy to control, and it is easy to cause hidden dangers such as early stress cracking and water seepage of the bottom plate concrete due to the supporting effect of groundwater pressure. It cannot meet the anti-floating requirements of the building throughout its life cycle. Therefore, it is urgent to design a basement bottom plate anti-floating monitoring and drainage pressure relief system. Utility Model Content

[0005] In order to solve the above technical problems, the utility model proposes a basement floor anti-floating monitoring and drainage pressure relief system, which is not only simple to construct and easy to operate, but also easy to control the quality. It is constructed synchronously with the post-casting strip, and will not cause the early stress cracking, water seepage and other related hidden dangers of the floor concrete due to the supporting effect of groundwater pressure.

[0006] The technical solution to achieve the purpose of the utility model is: a basement floor anti-floating monitoring and drainage pressure relief system, including a base soil layer, a building floor, a signal control terminal and a control circuit, the bottom outer wall of the building floor is provided with a concrete base plate, the bottom outer wall of the concrete base plate is provided with a concrete cushion layer, and the outer wall of one side of the concrete cushion layer is provided with a sump, the inner wall of the sump is installed with an electric-controlled water pump, the output end of the electric-controlled water pump is plugged with water pipe 2, the bottom inner wall of the water pipe 2 is installed with a stop valve, the top outer wall of the water pipe 2 is installed with a flow monitor, the top inner wall of the sump is installed with an upper limit liquid level sensor, the bottom inner wall of the sump is installed with a lower limit liquid level sensor, the inner wall of the base soil layer is provided with a hole, the inner wall of the hole is provided with a pressure relief pipe, and the outer wall of the pressure relief pipe is provided with a pebble filter layer.

[0007] In some embodiments, a tee is provided on the outer wall of the top end of the pressure relief pipe, a water pipe 1 is inserted into the inner wall of the tee, and a digital pressure monitoring gauge is installed on the outer wall of the other side of the water pipe 1.

[0008] In some embodiments, a pressure relief valve is installed on the inner wall of the other side of the water pipe, and the control circuits are connected to the signal control terminal, the digital pressure monitoring gauge, the pressure relief valve, the flow monitor, the electric-controlled water pump, the upper limit liquid level sensor, and the lower limit liquid level sensor.

[0009] In some embodiments, a water level over-limit alarm is installed on the inner wall of the sump, and the water level over-limit alarm is connected to a control circuit.

[0010] In some embodiments, the input end of the electric-controlled water pump is connected with a water inlet pipe, the water inlet pipe is located at the bottom of the sump, and the concrete cushion layer is connected to the base soil layer.

[0011] Compared with the prior art, the present invention has the following significant advantages:

[0012] 1. This system is not only simple to construct and easy to operate, but also easy to control the quality. It can be constructed synchronously with the post-casting strip, and will not cause the early stress cracking and water seepage of the bottom slab concrete due to the supporting effect of groundwater pressure.

[0013] 2. The use of this system can not only ensure the safety of the foundation pit construction phase of underground projects, shorten the construction period, but also save project costs, with good economic effects.

[0014] 3. Compared with the traditional anti-floating anchor design, this system can achieve the same functional effect and meet the anti-floating requirements throughout the life cycle of the building.

[0015] 4. It has promotion significance for areas in southern my country with abundant groundwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further explained below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 It is a schematic diagram of the overall structure provided in one embodiment of the utility model;

[0018] Figure 2 It is an enlarged schematic diagram of a pressure relief pipe connection structure provided in one embodiment of the utility model;

[0019] Figure 3 It is an enlarged schematic diagram of the connection structure of an electric-controlled water pump provided in one embodiment of the utility model.

[0020] Description of reference numerals:

[0021] 1. Base soil layer; 2. Concrete cushion layer; 3. Concrete bottom plate; 4. Building ground; 5. Pressure relief pipe; 6. Pebble filter layer; 7. Water pipe one; 8. Tee pipe; 9. Signal control terminal; 10. Control circuit; 11. Flow monitor; 12. Water level over-limit alarm; 13. Liquid level upper limit sensor; 14. Water pipe two; 15. Stop valve; 16. Liquid level lower limit sensor; 17. Electric-controlled water pump; 18. Pressure relief valve; 19. Digital pressure monitor. DETAILED DESCRIPTION

[0022] The utility model is described in detail below, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides a basement floor anti-floating monitoring and drainage pressure relief system through improvement. The technical solution of the utility model is: Figure 1-Figure 3 As shown, it includes a base soil layer 1, a building ground 4, a signal control terminal 9 and a control circuit 10, the bottom outer wall of the building ground 4 is provided with a concrete bottom plate 3, the bottom outer wall of the concrete bottom plate 3 is provided with a concrete cushion layer 2, a sump is provided on the outer wall of one side of the concrete cushion layer 2, an electric-controlled water pump 17 is installed on the inner wall of the sump, a water pipe 14 is plugged into the output end of the electric-controlled water pump 17, a stop valve 15 is installed on the bottom inner wall of the water pipe 14, a flow monitor 11 is installed on the top outer wall of the water pipe 14, an upper limit liquid level sensor 13 is installed on the top inner wall of the sump, a lower limit liquid level sensor 16 is installed on the bottom inner wall of the sump, a hole is opened on the inner wall of the base soil layer 1, a pressure relief pipe 5 is provided on the inner wall of the hole, and a pebble filter layer 6 is provided on the outer wall of the pressure relief pipe 5.

[0024] Furthermore, a tee pipe 8 is provided on the outer wall of the top end of the pressure relief pipe 5, a water pipe 7 is inserted into the inner wall of the tee pipe 8, a digital pressure monitoring gauge 19 is installed on the outer wall of the other side of the water pipe 7, and a pressure relief valve 18 is installed on the inner wall of the other side of the water pipe 7. The control circuit 10 is connected to the signal control terminal 9, the digital pressure monitoring gauge 19, the pressure relief valve 18, the flow monitor 11, the electric-controlled water pump 17, the upper limit liquid level sensor 13, and the lower limit liquid level sensor 16.

[0025] Furthermore, a water level over-limit alarm 12 is installed on the inner wall of the sump, and the water level over-limit alarm 12 is connected to the control circuit 10. The input end of the electric-controlled water pump 17 is plugged with an inlet pipe, which is located at the bottom of the sump, and the concrete cushion layer 2 is connected to the base soil layer 1.

[0026] The specific working method is: during installation, before the concrete bottom plate 3 and the cap steel bars are tied and the concrete is rammed, holes of size 500×500×500mm are evenly arranged at a spacing of 17.0m at the bottom of the raft in a rectangular grid manner, and the pressure relief pipe 5 is welded with D80mm hot-dip galvanized water pipe 17 (L=300mm) and D25mm hot-dip galvanized water pipe 214 (L=300mm), and buried along the center of the hole into the bottom of the plate with a depth of 450mm, with D25 on top (i.e., small on the top and large on the bottom, which is convenient for sealing the drainage hole), and is firmly fixed when pre-buried. The upper hole is temporarily blocked with soft material, the lower hole is covered with geotextile, and the pebble filter layer 6 is required to be arranged. After the pressure relief and drainage pipeline is connected to the sump, a digital pressure monitoring meter 19 and an electric pressure relief valve 18 are installed to complete the setting of the basement raft anti-floating pressure relief subsystem. In the sump, according to the setting requirements, an electric-controlled pump 17, a stop valve 15, an upper limit liquid level sensor 13, a lower limit liquid level sensor 16, a water level over-limit alarm 12, and a flow monitor 11 are installed at the corresponding positions to complete the setting of the groundwater collection and drainage subsystem. The control line 10 connects and debugs the signal control terminal 9 arranged in the monitoring room with the basement raft anti-floating pressure relief subsystem and the groundwater collection and drainage subsystem, and integrates them into an intelligent monitoring and pressure relief integrated system to form a complete path. Under the action of floating water pressure, the groundwater can flow through the pebble filter layer 6 through the pressure relief pipe 5 and be discharged out of the concrete bottom plate 3, so that the concrete bottom plate 3 is always kept free from the buoyancy, realizing the automatic management of the whole set of pressure relief monitoring system. During the construction period, the water discharged through the pressure relief valve 18 (in the normally open state) can be used for concrete maintenance. When the water volume increases, the excess water can be treated by centralized external discharge using the basement collection well. During the basement construction after the excavation of the foundation pit, the buoyancy control of the groundwater should continue to adopt buoyancy elimination measures, that is, arrange a precipitation system, continuously pump water, and maintain the groundwater level below the raft floor by ≥0.5m. After the main structure of the building project is completed, the groundwater control measures will be changed from the previous buoyancy elimination type to resistance balance type measures, that is, stop pumping, backfill the foundation pit, use the building structure to automatically balance the buoyancy and activate the entire set of pressure relief monitoring system.

[0027] The technical means disclosed in the utility model are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacement of the above technical features. Matters not covered in the utility model belong to the common knowledge of those skilled in the art.

Claims

1. A basement floor anti-floating monitoring and drainage pressure relief system, comprising a base soil layer (1), a building ground (4), a signal control terminal (9) and a control circuit (10), characterized in that: The bottom outer wall of the building floor (4) is provided with a concrete bottom plate (3), the bottom outer wall of the concrete bottom plate (3) is provided with a concrete cushion layer (2), a sump is provided on one side outer wall of the concrete cushion layer (2), an electric-controlled water pump (17) is installed on the inner wall of the sump, a water pipe (14) is plugged into the output end of the electric-controlled water pump (17), a stop valve (15) is installed on the bottom inner wall of the water pipe (14), a flow monitor (11) is installed on the top outer wall of the water pipe (14), an upper limit liquid level sensor (13) is installed on the top inner wall of the sump, and a lower limit liquid level sensor (16) is installed on the bottom inner wall of the sump, a hole is opened on the inner wall of the base soil layer (1), a pressure relief pipe (5) is provided on the inner wall of the hole, and a pebble filter layer (6) is provided on the outer wall of the pressure relief pipe (5).

2. The basement floor anti-floating monitoring and drainage pressure relief system according to claim 1 is characterized by: The top outer wall of the pressure relief pipe (5) is provided with a three-way pipe (8), the inner wall of the three-way pipe (8) is plugged with a water pipe (7), and the other outer wall of the water pipe (7) is installed with a digital pressure monitoring gauge (19).

3. The basement floor anti-floating monitoring and drainage pressure relief system according to claim 2 is characterized by: A pressure relief valve (18) is installed on the inner wall of the other side of the water pipe (7), and the control circuit (10) is connected to the signal control terminal (9), the digital pressure monitoring meter (19), the pressure relief valve (18), the flow monitor (11), the electric-controlled water pump (17), the upper limit liquid level sensor (13), and the lower limit liquid level sensor (16).

4. The basement floor anti-floating monitoring and drainage pressure relief system according to claim 3 is characterized by: A water level over-limit alarm (12) is installed on the inner wall of the sump, and the water level over-limit alarm (12) is connected to the control circuit (10).

5. The basement floor anti-floating monitoring and drainage pressure relief system according to claim 1 is characterized by: The input end of the electric-controlled water pump (17) is plugged with a water inlet pipe, the water inlet pipe is located at the bottom of the sump, and the concrete cushion layer (2) is connected to the base soil layer (1).

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