Device for detecting internal gap of backfill soil in suspended area below plate

Abstract

The utility model provides an under-plate suspended area backfill soil internal gap detection device, which comprises a structural plate and a soil body under the structural plate, backfill soil is arranged between the structural plate and the soil body, a backfill gap is arranged between the structural plate and the backfill soil, resistance cloth is pasted under the structural plate, and a terminal display is arranged on the structural plate. The resistance cloth is in communication connection with the terminal display through the integrated circuit; a plurality of air bags are vertically and horizontally arranged on the lower surface of the resistance cloth, fixed-value resistors, springs, resistor grooves and lines are arranged in the air bags, the fixed-value resistors are arranged on the inner surface layers of the air bags, the resistor grooves are formed in the resistance cloth cover layers in the air bags, and the fixed-value resistors and the resistor grooves are complementary in shape and connected through the springs. The resistor grooves in the adjacent air bags are in communication connection through lines, and the lines are clustered to form an integrated line. The utility model has the advantages of simplicity, feasibility, convenience in operation, low manufacturing cost, short construction period, scientificity, effectiveness, safety and environmental protection.

Description

Technical Field

[0001] The utility model relates to the technical field of building void filling, in particular to a device for detecting voids inside backfill soil in a suspended area under a slab. Background Art

[0002] Backfilling is a common construction process that ensures that structural loads are transferred to the ground. However, due to limitations in existing backfill technology and construction techniques, the density of the backfill soil may not meet expectations, especially for the backfill at the slab bottom. The presence of voids at the slab bottom makes it difficult to evenly transfer the load of the superstructure to the foundation, leading to uneven settlement and even structural deformation and collapse.

[0003] If the density of the backfill is tested during backfilling, the location of the gaps can be determined, and backfill can be carried out at a fixed point, ensuring the density of the backfill. Currently, there is no device for testing the density of the backfill under the slab, and how to scientifically, effectively, safely and environmentally friendly measure the density of the backfill under the structural slab is an urgent problem that needs to be solved. Utility Model Content

[0004] The purpose of the utility model is to provide a device for detecting internal voids in backfill soil in a suspended area under a slab, which is simple, easy to operate, low in cost, short in construction period, scientific and effective, safe and environmentally friendly.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions:

[0006] A device for detecting internal voids in backfill soil in a suspended area under a slab comprises a structural slab and soil thereunder, backfill soil being provided between the structural slab and the soil, a backfill void being formed between the structural slab and the backfill soil, a resistor cloth being attached under the structural slab, a terminal display being provided on the structural slab, and the resistor cloth being communicatively connected to the terminal display via an integrated circuit;

[0007] Several airbags are arranged vertically and horizontally on the lower surface of the resistor cloth. Fixed-value resistors, springs, resistor grooves and circuits are provided in the airbags. The fixed-value resistors are arranged on the inner surface of the airbags, and the resistor grooves are arranged on the inner cloth surface of the airbags. The shapes of the fixed-value resistors and the resistor grooves are complementary and they are connected by springs. The resistor grooves in adjacent airbags are connected by line communication, and the lines are bundled to form an integrated circuit; the terminal display is used to process data and display unfilled positions on the resistor cloth.

[0008] Furthermore, the airbags are numbered in sequence and equidistantly, and the resistance of the fixed resistor in the airbag is consistent with its airbag number, that is, the resistance of the fixed resistor in the airbag numbered 10 is 10Ω; the circuits in the airbag are arranged vertically and horizontally, that is, the fixed resistors are connected by circuits in the vertical and horizontal directions.

[0009] Furthermore, the surface of the resistor cloth is provided with isolation paper to prevent adhesion.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] This utility model is a device for detecting voids in backfill soil in suspended areas under slabs. It is simple, easy to operate, low-cost, short-term, scientifically effective, safe, and environmentally friendly. Specifically, the backfill soil squeezes and deforms the airbag, causing a fixed-value resistor to be connected to the circuit to determine whether the filling is dense, thereby detecting the density of the suspended area under the slab. The resistance changes in the circuit connected to the vertical and horizontal lines of the resistor cloth are used to determine the location of loose filling areas, that is, pores, providing a reference for subsequent secondary backfill or grouting. The resistor cloth can be attached to the bottom of the structural slab using an adhesive, and the terminal display shows the pore location and whether the filling is complete in real time, thereby reducing the impact of manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structural distribution of the present utility model.

[0013] Figure 2 This is a schematic diagram of the structural connection between the resistor cloth and the terminal display of the present invention.

[0014] Figure 3 It is a schematic diagram of the cross-sectional structure of the airbag of the present utility model.

[0015] Figure numerals: 1. terminal display; 2. resistor cloth; 3. integrated circuit; 4. structural plate; 5. soil; 6. suspended area under the plate; 7. backfill gap; 8. backfill soil; 9. airbag number; 10. airbag; 11. fixed resistor; 12. circuit; 13. spring; 14. resistor groove; 15. isolation paper. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

[0017] like Figure 1 、 2As shown in Figure 3, a device for detecting the internal gap of the backfill soil in the suspended area under the plate includes a structural plate 4 and a soil body 5 thereunder. Backfill soil 8 is provided between the structural plate 4 and the soil body 5. There is a backfill gap 7 between the structural plate 4 and the backfill soil 8. A resistor cloth 2 is attached under the structural plate 4. A terminal display 1 is provided on the structural plate 4. The resistor cloth 2 is connected to the terminal display 1 through an integrated circuit 3. A plurality of air bags 10 are arranged vertically and horizontally on the lower surface of the resistor cloth 2. A fixed resistor 11, a spring 13, a resistor groove 14 and a circuit 12 are provided in the air bag 10. The fixed resistor 11 is provided on the inner surface of the air bag 10. The resistor groove 14 is provided in the inner cloth layer of the airbag 10, the fixed resistor 11 and the resistor groove 14 are complementary in shape and are connected by a spring 13, the resistor grooves 14 in adjacent airbags 10 are communicated and connected via a line 12, and the lines 12 are bundled to form an integrated circuit 3; the terminal display 1 is used to process data and display the unfilled positions on the resistor cloth 2; the airbags 10 are numbered in sequence and equidistantly, the resistance value of the fixed resistor 11 in the airbag 10 is consistent with its airbag number 9, and the lines in the airbag 10 are arranged vertically and horizontally, that is, the fixed resistor 11 is connected by lines 12 in the vertical and horizontal directions.

[0018] Furthermore, the surface of the resistor cloth 2 is provided with a release paper 15 to prevent adhesion. Example

[0019] The waterproofing slabs in Building 5 and other areas of a certain plot of land experienced landslides at the corners of the slabs due to poor soil quality, high plasticity, prolonged exposure, and elevation differences. The maximum depth was approximately 2 meters, and the overhanging area was a 0.6m x 2m rectangular area. The basement pit floor cushion was at a -6.5m elevation, with an excavation depth of approximately 4.5m, including a partial excavation depth of approximately 5.6m. The pit circumference was approximately 884m.

[0020] The implementation scheme of the present utility model is as follows:

[0021] S1) Resistor fabric production

[0022] According to the planar shape and size of the suspended area 6 under the board, a resistor cloth 2 with a shape and size that matches the shape and size is selected, and the resistor cloth 2 is numbered, designed, and manufactured.

[0023] S2) Laying out the resistor fabric

[0024] After cleaning the bottom of the structural plate 4, tear off the isolation paper 15 and stick the resistor cloth 2 under the structural plate 4.

[0025] S3) Device connection

[0026] The resistor cloth 2 is connected to the terminal display 1 via the integrated circuit 3 and debugged to ensure that the position distribution of the resistor cloth 2 is consistent with the distribution displayed on the terminal display 1.

[0027] S4) Earthwork Backfill

[0028] Start the terminal display 1, conduct real-time detection during the backfilling process, and backfill in layers and areas in sequence.

[0029] S5) Gap Detection

[0030] Before the earth is backfilled, the terminal display 1 shows the position of each airbag 10 in red. The backfilling of earth will squeeze the airbag 10, so that the fixed resistor 11 and the resistor groove 14 are embedded into one, thereby connecting to the existing circuit; since the resistance value of the fixed resistor 11 is fixed, the filling completion position can be determined in combination with the longitudinal and transverse resistance values, and displayed in green.

[0031] For example, when the soil backfill at airbag number 9 at position 5 is completed and there is no gap, the longitudinal and transverse resistances increase by 5Ω each, thereby determining the filling position.

[0032] S6) Backfill gap filling

[0033] According to the unfilled area displayed on the terminal display 1 , the corresponding position can be found, and then the backfill gap 7 can be further filled by fixed-point grouting until there is no backfill gap 7 under the structural plate 4 .

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the concept of the present invention. These improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for detecting internal voids in backfill soil in the suspended area under a slab, comprising a structural slab and the soil beneath it, with backfill soil provided between the structural slab and the soil, and a backfill void between the structural slab and the backfill soil, characterized in that: The resistor cloth is attached under the structural plate, a terminal display is provided on the structural plate, and the resistor cloth is communicatively connected to the terminal display via an integrated circuit; Several airbags are arranged vertically and horizontally on the lower surface of the resistor cloth. Fixed-value resistors, springs, resistor grooves and circuits are arranged inside the airbags. The fixed-value resistors are arranged on the inner surface of the airbags, and the resistor grooves are arranged on the inner cloth surface layer of the airbags. The fixed-value resistors and the resistor grooves are connected by springs, and the resistor grooves in adjacent airbags are connected by circuit communication, and the circuits are bundled to form an integrated circuit.

2. The device for detecting internal voids in backfill soil in the suspended area under a slab according to claim 1, characterized in that: The airbags are numbered in sequence, the resistance of the fixed resistors in the airbags is consistent with the airbag numbers, and the circuits in the airbags are arranged vertically and horizontally.

3. The device for detecting internal voids in backfill soil in the suspended area under a slab according to claim 1, characterized in that: The surface of the resistor cloth is provided with isolation paper.

Images