Underground engineering anti-floating bottom plate heave measuring device and measuring method

Abstract

The application discloses a device and a method for measuring the uplift amount of a bottom plate of an underground structure, wherein the device part comprises a reinforced concrete frame and a water storage pool; the water storage pool is arranged at the bottom of the bottom plate of the reinforced concrete frame; water is injected into the water storage pool to simulate the upward floating and uplift of the one-way bottom plate of the underground structure; a displacement meter is arranged to record the upward floating and uplift of the one-way bottom plate of the underground structure; then, the values recorded by the displacement meters on the edges of the one-way bottom plate are fitted; and finally, a formula conforming to the upward floating and uplift amount is obtained. The reinforced concrete frame can well simulate the underground structure, can satisfy the constraint of the overall rigidity of the structure on the bottom plate, and can simplify the test manufacturing process; the water in the water storage pool at the bottom can well simulate the pressure generated by the underground water pressure on the bottom plate of the underground structure, and can generate uniform pressure on the bottom plate; and the fitted formula can well simulate the upward floating and uplift amount of the one-way plate at each position when the one-way plate is subjected to the underground water pressure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anti-floating of underground structure bottom plate, in particular to a device and method for measuring the uplift of an anti-floating bottom plate of underground engineering. BACKGROUND

[0002] Underground engineering is buried underground, and under the action of groundwater buoyancy, the underground structure will be subjected to upward pressure, resulting in upward uplift deformation of the basement bottom plate. With the popularization of prefabricated buildings, the application of one-way plates is also more and more widely used. Analyzing the uplift deformation characteristics and deformation law of the basement bottom plate, especially the one-way bottom plate, has a good guiding significance for optimizing the design of the underground one-way bottom plate structure and studying the deformation and cracking of the one-way bottom plate. How to truly carry out the uplift test and uplift deformation analysis of the underground structure bottom plate and fit the uplift formula of the anti-floating one-way bottom plate according to the measured data is of great significance to reveal the deformation development law of the one-way bottom plate under the action of groundwater buoyancy. How to design the related test and how to fit the formula, which can well reflect the real deformation characteristics of the one-way bottom plate and is convenient for test operation, is a problem to be solved. SUMMARY

[0003] The purpose of the present application is to provide a device and method for measuring the uplift of an anti-floating bottom plate of underground engineering to solve the problems existing in the prior art, which can well simulate the deformation of the underground structure, can meet the constraints of the overall stiffness of the structure on the one-way bottom plate, can simplify the test manufacturing process, and ultimately obtain the uplift formula that conforms to the actual situation.

[0004] To achieve the above purpose, the present application provides the following scheme: the present application provides a device for measuring the uplift of an anti-floating bottom plate of underground engineering, comprising

[0005] A reinforced concrete frame, a water storage tank is arranged at the bottom of the bottom plate of the reinforced concrete frame;

[0006] The water storage tank is connected to the pressure pump through the water inlet pipe, water is injected into the water storage tank through the pressure pump, and the water storage tank is also provided with a water outlet nozzle, and the water outlet nozzle is provided with a pressure relief valve;

[0007] A displacement meter, a plurality of displacement meters are arranged on the one-way bottom plate of the reinforced concrete frame, wherein not less than five are arranged on one long side and not less than five are arranged on one short side, and nine displacement meters are uniformly arranged on the measuring points of the plate.

[0008] Preferably, the reinforced concrete frame has 1 layer.

[0009] Preferably, the reinforced concrete frame adopts a 4x4 column net.

[0010] Preferably, the water inlet valve is located at the bottom of the water storage pool, and the water outlet nozzle and pressure relief valve are located at one side of the top of the water storage pool.

[0011] Preferably, the displacement meter is fixed on the reference rod by a magnetic table base.

[0012] A method for measuring the uplift amount of an anti-floating bottom plate of an underground engineering, applied to the underground engineering anti-floating bottom plate uplift amount measuring device, comprising the following steps:

[0013] S1, a reinforced concrete frame provided with a water storage pool at the bottom is made;

[0014] S2, the displacement meter is fixed on the reference rod, and the displacement meter abuts against the one-way bottom plate of the middle region of the reinforced concrete frame;

[0015] S3, the water inlet valve of the water storage pool is connected to the pressure pump by a water inlet pipe, water is injected into the water storage pool, the water outlet nozzle is closed after continuous water outlet, the pressure relief valve is adjusted to the safety pressure value of the test design, and the pressure pump is used to continue to inject water into the water storage pool to the first pressure value;

[0016] S4, the uplift deformation of the one-way bottom plate of the middle region of the reinforced concrete frame is observed, and the displacement meter reading is recorded; continue to inject water to the second pressure value, and record the displacement meter reading;

[0017] S5, after repeating the injection and recording the displacement value to the design pressure, the water outlet switch is slowly opened to discharge the injected water in the water storage pool, and the test is ended;

[0018] S6, according to the five displacement meter readings Δh b of the short side, the fitting formula f(x b )=k b ·Δh b is obtained, where k b is a function of the independent variable x b , Δh b is the uplift amount of each measuring point in the short side direction, and the independent variable x b represents the position of each fitting point on the short side;

[0019] S7, according to the five displacement meter readings Δh L of the long side, the fitting formula f(x L )=k L ·Δh L is obtained, where k L is a function of the independent variable x L , Δh L is the uplift amount of each measuring point in the long side direction, and the independent variable x L represents the position of each fitting point on the long side;

[0020] S8, the fitting formula of the amount of floating uplift of the one-way plate is obtained according to the displacement meter reading Ah of the nine measuring points on the plate, Ah=k3·[f(x b )+f(x L )], wherein k3 is a function of x L and x b , and Ah is the amount of floating uplift of each measuring point in the one-way plate.

[0021] The present application has the following beneficial technical effects relative to the prior art:

[0022] The underground engineering anti-floating bottom plate uplift amount measuring device and measuring method in the present application, wherein the test device part comprises a reinforced concrete frame, a water reservoir and a reference assembly, the water reservoir is arranged at the bottom of the bottom plate of the reinforced concrete frame, water is injected into the water reservoir to simulate the floating uplift of the underground structure bottom plate caused by the underground water, and the reference assembly is arranged, the floating uplift of the underground structure bottom plate is recorded through the numerical value of the displacement meter. The reinforced concrete frame in the present application can well simulate the underground structure, can satisfy the constraint of the overall rigidity of the structure on the bottom plate, and can simplify the test manufacturing process; the water in the water reservoir at the bottom can well simulate the pressure on the underground structure bottom plate caused by the underground water pressure, and uniform pressure is generated on the bottom plate. The fitting formula can well simulate the floating uplift of each part of the one-way plate under the action of the underground water pressure. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0024] Figure 1 It is a sectional view of the underground engineering anti-floating bottom plate uplift amount measuring device of the present application;

[0025] Figure 2 It is a sectional view of A-A in the present application; Figure 1

[0026] Figure 3 It is a uplift calculation diagram of the one-way bottom plate ABCD in the present application; Figure 2

[0027] Figure 4 It is a displacement meter arrangement diagram of the nine measuring points in the central position of the one-way bottom plate ABCD in the present application; Figure 2

[0028] Figure 5 Figure 2 ​​​​Displacement gauge arrangement of measuring points on each side of the one-way floor ABCD;

[0029] Explanation of reference numerals: 11, ground; 21, pressure pump; 22, water inlet pipe; 23, water inlet valve; 24, water storage tank; 25, pressure relief valve; 26, water outlet nozzle; 31, reinforced concrete frame; 32, reinforced concrete column; 33, floor; 34, floor slab; 41, displacement gauge. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] The purpose of the present application is to provide a device for measuring the uplift amount of the anti-floating floor of underground engineering and a calculation method, so as to solve the problems existing in the prior art, and to well simulate the deformation of the underground structure, to meet the constraint of the overall stiffness of the structure on the floor, and to simplify the test manufacturing process. The fitted formula can well simulate the uplift amount of the one-way floor at each position under the action of groundwater pressure.

[0032] In order to make the above-mentioned purposes, characteristics and advantages of the present application more apparent and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0033] As shown in Figures 1-5 The present application provides a device for measuring the uplift amount of the anti-floating floor of underground engineering, which comprises

[0034] The reinforced concrete frame 31 is provided with a water storage tank 24 capable of bearing a certain pressure at the bottom of the floor 33 of the reinforced concrete frame 31; and

[0035] The water storage tank 24 is connected to the pressure pump 21 through the water inlet pipe 22 and the water inlet valve 23, water is injected into the water storage tank 24 through the pressure pump 21, and the water storage tank 24 is also provided with a water outlet nozzle 26, and the pressure relief valve 25 is arranged at the water outlet nozzle 26;

[0036] In one embodiment, the reinforced concrete frame 31 has one layer, and the reinforced concrete frame 31 adopts a 4x4 column net, and the displacement gauges 41 are uniformly arranged in the middle of the one-way floor 33 of the middle column net and on the four sides.

[0037] In one embodiment, the water inlet valve 23 is located at the bottom of the water storage tank 24, and the water outlet nozzle 26 and the pressure relief valve 25 are located at one side of the top of the water storage tank 24.

[0038] In one of the embodiments, the displacement meter 41 is fixed on the reference rod by a magnetic base.

[0039] A method for measuring the uplift amount of an anti-floating bottom plate of underground works, applied to the underground works anti-floating bottom plate uplift amount measuring device, comprising the following steps:

[0040] S1, make a reinforced concrete frame 31 provided with a water storage tank 24 at the bottom;

[0041] S2, fix the displacement meter 41, and make the displacement meter 41 abut against the middle area bottom plate of the reinforced concrete frame 31;

[0042] S3, connect the water inlet valve 23 of the water storage tank 24 to the pressure pump 21 by the water inlet pipe 22, fill water into the water storage tank 24, close the water outlet nozzle 26 after continuous water outlet, adjust the pressure relief valve 25 to the safety pressure value designed for the test, continue to fill water into the water storage tank 24 by using the pressure pump 21 to the first pressure value;

[0043] S4, observe the uplift deformation of the one-way bottom plate of the middle area of the reinforced concrete frame 31, and record the reading of the displacement meter 41; continue to fill water to the second pressure value, and record the reading of the displacement meter 41;

[0044] S5, after repeating the water filling and recording the displacement value to the design pressure, slowly open the water outlet nozzle 26 switch to discharge the water filling in the water storage tank 24, and end the test;

[0045] S6, according to the readings Δh b of the five displacement meters on the short side, obtain the fitting formula f(x b )=k b ·Δh b of the uplift amount in the short side direction, wherein k b is a function of the variable x b , Δh b is the uplift amount of each measuring point in the short side direction, and the variable x b represents the position of each fitting point on the short side;

[0046] S7, according to the readings Δh L of the five displacement meters on the long side, obtain the fitting formula f(x L )=k L ·Δh L of the uplift amount in the long side direction, wherein k L is a function of the variable x L , Δh L is the uplift amount of each measuring point in the long side direction, and the variable x L represents the position of each fitting point on the long side;

[0047] S8, the fitting formula of the single-direction plate floating uplift amount is obtained according to the displacement meter reading Ah of the nine measuring points on the plate, Ah=k3·[f(x b )+f(x L )], wherein k3 is a function of x L and x b , and Ah is the floating uplift amount of each measuring point in the single-direction plate.

[0048] The reinforced concrete frame 31 in the application can well simulate the underground structure, the 1st floor structure is convenient for arranging the displacement meter on the single-direction bottom plate, and can simplify the test manufacturing process; the water flushing of the water storage tank 24 at the bottom can well simulate the pressure on the bottom plate of the underground structure caused by the underground water pressure, and generates uniform pressure on the bottom plate 33. The reinforced concrete frame 31 in the application adopts a 4x4 column net, which can ensure that the four edges of the middle column net are constrained by the floor 34, ensure that the deformation of the bottom plate 33 of the middle column net is more in line with the actual uplift deformation of the bottom plate of the underground structure, and eliminate the influence of the boundary on the deformation of the bottom plate 33.

[0049] It should be noted that, for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application, and any reference signs in the claims should not be regarded as limiting the claims.

[0050] The principles and implementation modes of the application are described by applying specific examples in the application, the above embodiment descriptions are only used to help understand the method of the application and its core idea; at the same time, for those skilled in the art, according to the idea of the application, there will be changes in the specific implementation mode and application range. In conclusion, the content of the specification should not be understood as a limitation of the application.

Claims

1. A method for measuring the uplift of the anti-buoyancy bottom slab in underground engineering, characterized in that, The method comprises the following steps: S1, making a reinforced concrete frame provided with a water storage tank at the bottom; S2, fixing displacement meters on the reference bars and making the displacement meters abut against the one-way bottom plates of the middle region of the reinforced concrete frame; S3, connecting the water inlet valve of the water storage tank to the pressure pump through a water inlet pipe, injecting water into the water storage tank, closing the water outlet nozzle after continuous water outlet, adjusting the pressure relief valve to the safety pressure value designed for the test, and continuing to inject water into the water storage tank to the first pressure value using the pressure pump; S4, observing the bulging deformation of the one-way bottom plates of the middle region of the reinforced concrete frame and recording the readings of the displacement meters; continuing to inject water to the second pressure value and recording the readings of the displacement meters; S5, after repeating the injection of water and recording the displacement values to the design pressure, slowly opening the water outlet switch to discharge the injected water in the water storage tank, and ending the test; S6. Five displacement meter readings Ah on one side of the short side of the one-way floor of the reinforced concrete frame b A fitting formula f(x) of the amount of floating in the short side direction is derived b ) = k b · Ah b , where k b is a function of x b , Ah b is the amount of floating of each measuring point in the short side direction, and x b represents the position of each fitting point in the short side direction; S7. Five displacement meter readings Ah on one long side of the one-way slab of the reinforced concrete frame L A fitting formula f(x) of the amount of floating in the long side direction is derived L ) = k L · Ah L , where k L is a function of x L , Ah L is the amount of floating of each measuring point in the long side direction, and x L represents the position of each fitting point in the long side direction; S8. A fitting formula of the amount of floating uplift of the one-way plate is derived from the displacement meter readings Ah of nine measuring points uniformly arranged on the measuring points of the one-way plate, Ah=k3-[f(x b )+f(x L )], wherein k3 is a function of x L and x b , Ah is the amount of floating uplift of each measuring point in the one-way plate; The underground engineering anti-floating bottom plate bulging measurement device applied in the underground engineering anti-floating bottom plate bulging measurement method, comprising a reinforced concrete frame, the bottom plate of the reinforced concrete frame is provided with a water storage tank at the bottom; and a water storage tank, the water inlet valve of the water storage tank is connected to the pressure pump through a water inlet pipe, water is injected into the water storage tank through the pressure pump, a water outlet nozzle is arranged on the water storage tank, and a pressure relief valve is arranged at the water outlet nozzle; and displacement meters, a plurality of displacement meters are arranged on the one-way bottom plate of the reinforced concrete frame, wherein not less than five displacement meters are arranged on one long side and not less than five displacement meters are arranged on one short side, and all the displacement meters are uniformly arranged on the measurement points of the one-way bottom plate.

2. The method of claim 1, wherein: The reinforced concrete frame has one layer.

3. The method of claim 1, wherein: The reinforced concrete frame adopts a 4×4 column net.

4. The method of uplift measurement of a basement according to claim 1, wherein: The transverse spacing of the column net in the reinforced concrete frame is 3 times the longitudinal spacing, and the bottom plate is divided into 9 one-way bottom plates with a length-width ratio of 3.

5. The method of uplift measurement of the underground engineering anti-uplift floor heave according to claim 1, characterized in that: The water inlet valve is located at the bottom of the water storage tank, and the water outlet nozzle and the pressure relief valve are located at one side of the top of the water storage tank.

6. The method of uplift measurement of a tunnel anti-floatation slab according to claim 4, wherein: The displacement meters are fixed on the reference bars by magnetic table seats.

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