A water stop effect testing device for a deep foundation pit water stop curtain

Abstract

The application discloses a kind of water-stop effect test devices of deep foundation pit water-stop curtain, including test box, two symmetrically arranged mounting blocks are fixedly connected on the test box, the cross section of each mounting block is arranged as concave letter, water-stop piece is arranged between two mounting blocks, a plurality of water inlet pipes are fixedly connected on the side of test box, and pump water machine is installed on the side of water inlet pipe;Two sliding blocks are slidably connected on each mounting block, a plurality of limiting grooves with right-angled trapezoidal cross section are formed in each sliding block, and a plurality of limiting components are arranged on the mounting block.The application does not need to set a large number of pumping holes and observation holes, and does not need to consume a large amount of manpower and material resources, with lower cost, the water-stop effect of water-stop curtain can be evaluated in design stage in advance, and the detection effect of water-stop effect of water-stop curtain is better.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water stop curtain, in particular to a water stop effect test device for deep foundation pit water stop curtain. BACKGROUND

[0002] In deep foundation pit engineering, if the underground water level of the surrounding stratum is higher than the bottom of the foundation pit, water will flow into the foundation pit, and even the pit wall will collapse. For deep foundation pit engineering with underground water level higher than the bottom of the pit, water stop curtain is needed to block the seepage of underground water into the foundation pit, reduce the seepage speed, and reduce the influence of underground water seepage on the surrounding environment.

[0003] The water stop effect of water stop curtain has a great influence on the safety of foundation pit, the deformation of surrounding environment and the construction period, so it is necessary to detect the water stop effect of water stop curtain. At present, group well pumping test method is used for detection. This method needs to set a large number of pumping holes and observation holes, consumes a large amount of manpower and material resources, has high cost, and cannot evaluate the water stop effect of water stop curtain in the design stage in advance. The detection effect of water stop effect of water stop curtain is poor. SUMMARY

[0004] The purpose of the present application is to solve the following shortcomings in the prior art: the group well pumping test method is used for detection, which needs to set a large number of pumping holes and observation holes, consumes a large amount of manpower and material resources, has high cost, and cannot evaluate the water stop effect of water stop curtain in the design stage in advance. The detection effect of water stop effect of water stop curtain is poor. A water stop effect test device for deep foundation pit water stop curtain is proposed.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] A water stop effect test device for deep foundation pit water stop curtain, comprising a test box, two symmetrically arranged mounting blocks are fixedly connected to the test box, the cross section of each mounting block is arranged in a concave shape, a water stop piece is arranged between the two mounting blocks, a plurality of water inlet pipes are fixedly connected to one side of the test box, and a water pump is arranged on one side of the water inlet pipe.

[0007] Two sliding blocks are slidably connected to each mounting block, a plurality of limiting grooves with straight trapezoidal cross section are formed in each sliding block, a plurality of limiting assemblies are arranged on the mounting block, each limiting assembly comprises a limiting rod slidably connected to the mounting block, a first spring is fixedly connected to the limiting rod, the first spring is fixedly connected to the mounting block, and the limiting rod is clamped with the water stop piece.

[0008] The test box is fixedly connected with a plurality of water outlets on one side, a plurality of filter screens are installed on the test box and are equidistantly arranged, an installation rod is fixedly connected to each filter screen, a plurality of fixing assemblies are arranged on the test box, each fixing assembly comprises a horizontal plate fixedly connected to the test box, and the horizontal plate is connected with the corresponding installation rod through a plug shaft.

[0009] Preferably, a plurality of fixing plates are fixedly connected to the test box and are symmetrically arranged, a sliding rod is slidingly connected to each fixing plate, the sliding rod is connected with the fixing plate through a second spring, a moving block is fixedly connected to each sliding block, a clamping groove is formed in the moving block, and the sliding rod and the moving block are clamped.

[0010] Preferably, a rotating sleeve is threadedly connected to each sliding rod, and the rotating sleeve is used for limiting the movement of the sliding rod.

[0011] Preferably, a rectangular plate is fixedly connected to one side of the test box, a lead screw is rotatably connected to the rectangular plate, a fixing block is threadedly connected to the lead screw, and the fixing block has a T-shaped cross section.

[0012] Preferably, a sliding groove is formed in the test box, and the fixing block and the sliding groove are slidingly connected.

[0013] Preferably, a third spring is fixedly connected to each plug shaft, and the third spring is fixedly connected with the corresponding horizontal plate.

[0014] Preferably, an extrusion block having a right-angled triangular cross section is fixedly connected to the upper end of each plug shaft, and a plurality of extrusion rods used in cooperation with the extrusion block are fixedly connected to the fixing block.

[0015] Preferably, a handle is fixedly connected to the upper end of the lead screw, a fixing rod is connected with the handle through a return spring, a plurality of circular grooves are formed in the rectangular plate, the fixing rod and the circular grooves are clamped, a limiting block having an L-shaped cross section is rotatably connected to the upper end of the fixing rod, and the limiting block and the handle are clamped.

[0016] Preferably, a sealing gasket is fixedly connected to each filter screen, and the sealing gasket has a circular annular cross section.

[0017] Compared with the prior art, the test box has the following beneficial effects:

[0018] 1. Continuously add water to the test chamber through the water inlet pipe until water comes out of the outlet pipe, so as to complete the simulation of the groundwater seepage process into the foundation pit when the test water-stop curtain is used. By recording the time from water injection to water discharge, i.e., the seepage time, the water-stopping effect of the test water-stop curtain used in the test foundation pit can be tested and evaluated. The longer the seepage time, the better the water-stopping effect. If the seepage time is greater than the specified value, it can be shown that the test water-stop curtain can meet the test conditions for the test foundation pit. There is no need to set up a large number of pumping holes and observation holes, nor does it consume a lot of manpower and material resources. The cost is low. The water-stopping effect of the water-stop curtain can be evaluated in advance in the design stage, and the test effect of the water-stopping effect of the water-stop curtain is good.

[0019] 2. Keep the handle still and pull the fixed rod upward. The fixed rod and the handle will slide relative to each other. After the limit block moves, it will be located above the handle as a whole. Turn the limit block. After the limit block and the fixed rod rotate relative to each other, one end of the L-shaped limit block will be located on the outside of the handle. Remove the external force applied to the fixed rod. Under the elastic force of the reset spring, the fixed rod and the corresponding circular groove on the rectangular plate will be engaged, so that the filter can be stably installed on the test box, which can prevent the loss of soil near the outlet pipe and avoid the loss of soil caused by large-diameter holes that do not exist in actual projects, which is conducive to ensuring the accuracy and reliability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front structural schematic diagram of a water-stopping effect test device for a deep foundation pit water-stopping curtain proposed by the present invention;

[0021] Figure 2 This is a side structural diagram of a water-stopping effect test device for a deep foundation pit water-stopping curtain proposed by the present invention;

[0022] Figure 3 This is a schematic diagram of the top view of a water-stopping effect test device for a deep foundation pit water-stopping curtain proposed by the present invention;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of a water-stopping effect test device for a deep foundation pit water-stopping curtain proposed by the present invention;

[0024] Figure 5 This is a partial cross-sectional structural diagram of a water-stopping effect test device for a deep foundation pit water-stopping curtain proposed by the present invention;

[0025] Figure 6 A schematic diagram of the partial cross-sectional structure of the water stop plate and the sliding block.

[0026] In the figure: 1 test box, 2 water outlet pipe, 3 fixed block, 4 rectangular plate, 5 fixed plate, 6 water stop, 7 movable block, 8 second spring, 9 mounting block, 10 sliding rod, 11 rotating sleeve, 12 water inlet pipe, 13 water pump, 14 extrusion block, 15 plug-in shaft, 16 fixed rod, 17 slide groove, 18 screw rod, 19 mounting rod, 20 horizontal plate, 21 handle, 22 limit block, 23 sealing gasket, 24 filter screen, 25 sliding block, 26 first spring, 27 limit groove, 28 limit rod. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] Reference Figure 1-6 A water-stopping effect test device for a deep foundation pit water-stop curtain comprises a test box 1, on which two symmetrically arranged mounting blocks 9 are fixedly connected, the cross section of each mounting block 9 being arranged in a concave shape, a water-stop plate 6 being arranged between the two mounting blocks 9, a plurality of water inlet pipes 12 being fixedly connected to one side of the test box 1, a water pump 13 being installed on one side of the water inlet pipe 12, two sliding blocks 25 being slidably connected to each mounting block 9, each sliding block 25 being provided with a plurality of limiting grooves 27 having a right-angled trapezoidal cross section, a plurality of limiting components being arranged on the mounting block 9, each limiting component comprising a limiting rod 28 slidably connected to the mounting block 9, a first spring 26 being fixedly connected to the limiting rod 28, the first spring 26 being fixedly connected to the mounting block 9, and the limiting rod 28 being clamped with the water-stop plate 6.

[0029] A plurality of water outlet pipes 2 are fixedly connected to one side of the test box 1, and a plurality of equidistantly arranged filter screens 24 are installed on the test box 1. A mounting rod 19 is fixedly connected to each filter screen 24. A plurality of fixed components are provided on the test box 1, and each fixed component includes a horizontal plate 20 fixedly connected to the test box 1. The horizontal plate 20 is connected to the corresponding mounting rod 19 through an insertion shaft 15. A sealing gasket 23 is fixedly connected to each filter screen 24. The cross section of the sealing gasket 23 is arranged in a circular ring shape. The circular ring-shaped sealing gasket 23 can improve the sealing performance when the filter screen 24 and the inner wall of the test box 1 are fitted together.

[0030] The test box 1 is fixedly connected with a plurality of fixed plates 5 arranged symmetrically, each fixed plate 5 is slidably connected with a sliding rod 10, the sliding rod 10 is connected with the fixed plate 5 through a second spring 8, each sliding block 25 is fixedly connected with a moving block 7, the moving block 7 is provided with a clamping groove, the sliding rod 10 and the moving block 7 are clamped, each sliding rod 10 is threadedly connected with a rotating sleeve 11, the rotating sleeve 11 is used for limiting the movement of the sliding rod 10, so that the rotating sleeve 11 and the sliding rod 10 relatively rotate, the rotating sleeve 11 is threadedly connected with the sliding rod 10 in the process of rotating, the rotating sleeve 11 moves away from the fixed plate 5, since one end of the second spring 8 is fixedly connected with the sliding rod 10 and the other end is fixedly connected with the fixed plate 5, without the limiting effect of the rotating sleeve 11, under the elastic force of the second spring 8, the sliding rod 10 relatively slides with the fixed plate 5 until one end of the sliding rod 10 is clamped with the clamping groove on the moving block 7.

[0031] The test box 1 is fixedly connected with a rectangular plate 4, the rectangular plate 4 is rotatably connected with a lead screw 18, the lead screw 18 is threadedly connected with a fixed block 3, the cross section of the fixed block 3 is arranged in a T shape, the test box 1 is provided with a sliding groove 17, the fixed block 3 is slidably connected with the sliding groove 17, the lead screw 18 is rotated, since the fixed block 3 is threadedly connected with the lead screw 18 and the fixed block 3 is slidably connected with the sliding groove 17, the sliding groove 17 can limit the movement track of the fixed block 3, the fixed block 3 will stably vertically move downwards along with the rotation of the lead screw 18, each insertion shaft 15 is fixedly connected with a third spring, the third spring is fixedly connected with the corresponding horizontal plate 20, in the process of vertically moving downwards, each extrusion rod will continue to move downwards together with the extrusion block 14, in the process of vertically moving downwards together with the insertion shaft 15 and the extrusion block 14, the insertion shaft 15 will relatively slide with the horizontal plate 20, and the third spring will be deformed at the same time.

[0032] The upper end of each insertion shaft 15 is fixedly connected with an extrusion block 14 arranged in a right triangle shape, the fixed block 3 is fixedly connected with a plurality of extrusion rods used in cooperation with the extrusion block 14, the upper end of the lead screw 18 is fixedly connected with a handle 21, the handle 21 is connected with a fixed rod 16 through a reset spring, the rectangular plate 4 is provided with a plurality of circular grooves, the fixed rod 16 is clamped with the circular grooves, the upper end of the fixed rod 16 is rotatably connected with a limiting block 22 arranged in an L shape, the limiting block 22 is clamped with the handle 21, the fixed rod 16 is pulled upwards, the fixed rod 16 relatively slides with the handle 21, the reset spring is deformed, after the limiting block 22 moves, the limiting block 22 is located above the handle 21 as a whole, the limiting block 22 is rotated, after the limiting block 22 relatively rotates with the fixed rod 16, one end of the limiting block 22 arranged in an L shape is located outside the handle 21, the external force applied to the fixed rod 16 is removed, under the elastic force of the reset spring, one end of the fixed rod 16 is clamped with the corresponding circular groove on the rectangular plate 4.

[0033] In the application, when in use, the test box 1 is filled with soil samples simulating the foundation soil around the foundation pit to be tested, and then the waterproof piece 6 is buried in the test box 1, the waterproof piece 6 is similar to the material, height, thickness and shape of the waterproof curtain, when the waterproof piece 6 is buried in the test box 1, it is located between the two mounting blocks 9 and has a certain distance from the lower inner wall of the test box 1, and keeps its position unchanged, then each moving block 7 is pulled upwards, each sliding block 25 simultaneously slides relative to the mounting block 9, each limiting groove 27 simultaneously slides relative to the corresponding limiting rod 28, because the cross section of the limiting groove 27 is arranged in a right trapezoidal shape, one end of the limiting rod 28 is slidably connected with the inclined surface of the limiting groove 27, with the upward movement of the limiting groove 27, the limiting rod 28 simultaneously slides relative to the mounting block 9, and the first spring 26 deforms, after the one end of the limiting rod 28 moves, it will be clamped with the waterproof piece 6.

[0034] In the initial state, the rotating sleeve 11 is connected with the sliding rod 10 and adheres to the surface of the corresponding fixed plate 5, then the rotating sleeve 11 and the sliding rod 10 are relatively rotated, in the process of rotating, the rotating sleeve 11 is threadedly connected with the sliding rod 10, and the rotating sleeve 11 simultaneously moves away from the fixed plate 5 until it is separated from the sliding rod 10, because one end of the second spring 8 is fixedly connected with the sliding rod 10 and the other end is fixedly connected with the fixed plate 5, without the limiting action of the rotating sleeve 11, under the elastic force of the second spring 8, the sliding rod 10 slides relative to the fixed plate 5 until the one end of the sliding rod 10 is clamped with the clamping groove on the moving block 7, thereby preventing the moving block 7 and the sliding block 25 from moving randomly, and the waterproof piece 6 is stably buried in the test box 1.

[0035] The pressure value of the water pump 13 is adjusted to the same value as the water pressure value of the foundation soil around the foundation pit to be tested and kept at this value, water is continuously added to the test box 1 through the water inlet pipe 12 until water is discharged from the water outlet pipe 2, the simulation of the groundwater seepage process of the foundation pit to be tested using the waterproof curtain to be tested can be completed, the time from water injection to water discharge, that is, the seepage time, is recorded, and the detection and evaluation of the waterproof effect of the waterproof curtain to be tested used in the foundation pit to be tested can be completed, the longer the seepage time, the better the waterproof effect, and if the seepage time is greater than the specified value, it can be explained that the waterproof curtain to be tested used in the foundation pit to be tested can meet the requirements of the foundation pit to be tested, a large number of water pumping holes and observation holes do not need to be set, and a large amount of manpower and material resources do not need to be consumed, the cost is low, the waterproof effect of the waterproof curtain can be evaluated in the design stage in advance, and the detection effect of the waterproof effect of the waterproof curtain is good.

[0036] By connecting each filter screen 24 with the test box 1, each filter screen 24 respectively shields the corresponding water outlet pipe 2 pipe orifice, at this time one end of the mounting rod 19 penetrates the test box 1, the connection between the mounting rod 19 and the test box 1 is good in sealing, then the lead screw 18 is rotated, since the fixed block 3 and the lead screw 18 are threadedly connected, and the fixed block 3 and the sliding groove 17 are slidingly connected, the sliding groove 17 can limit the movement track of the fixed block 3, the fixed block 3 will stably vertically move downward along with the rotation of the lead screw 18, in the process of vertically moving downward of each extrusion rod, the extrusion rod will contact the corresponding extrusion block 14 and continue to move downward together against the extrusion block 14.

[0037] In the process of vertically moving downward of the extrusion block 14 and the insert shaft 15 together, the insert shaft 15 will relatively slide with the horizontal plate 20, and the third spring will simultaneously deform, after the insert shaft 15 vertically moves downward, the lower end of the insert shaft 15 will be clamped with the corresponding mounting rod 19, then the handle 21 is kept stationary, the fixed rod 16 is pulled upward, the fixed rod 16 and the handle 21 relatively slide, since one end of the return spring is fixedly connected with the handle 21 and the other end is fixedly connected with the fixed rod 16, the return spring deforms, after the limiting block 22 moves, the limiting block 22 as a whole is located above the handle 21 and is not connected with the handle 21, then the position of the fixed rod 16 is kept unchanged, the limiting block 22 is rotated, after the limiting block 22 and the fixed rod 16 relatively rotate, one end of the L-shaped limiting block 22 is located outside the handle 21, the external force applied on the fixed rod 16 is removed, under the elastic force of the return spring, the limiting block 22 and the fixed rod 16 simultaneously vertically move downward, one end of the fixed rod 16 is clamped with the corresponding circular groove on the rectangular plate 4, so that the filter screen 24 can be stably installed on the test box 1, the soil loss near the water outlet pipe 2 can be prevented, the soil loss caused by the large-diameter hole which does not exist in actual engineering can be avoided, and the accuracy and reliability of the test can be ensured.

[0038] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A device for testing the water stopping effect of a water stopping curtain of a deep foundation pit, comprising a test box (1), characterized in that, The test box (1) is fixedly connected with two symmetrically arranged mounting blocks (9), the cross section of each mounting block (9) is arranged as a concave letter, a water stop piece (6) is arranged between the two mounting blocks (9), a plurality of water inlet pipes (12) are fixedly connected to one side of the test box (1), and a water pump (13) is mounted on one side of the water inlet pipe (12). Each mounting block (9) is slidably connected with two sliding blocks (25), a plurality of limiting grooves (27) with a straight trapezoidal cross section are formed in each sliding block (25), a plurality of limiting assemblies are arranged on the mounting block (9), each limiting assembly comprises a limiting rod (28) slidably connected with the mounting block (9), a first spring (26) is fixedly connected to the limiting rod (28), the first spring (26) is fixedly connected with the mounting block (9), and the limiting rod (28) is clamped with the water stop piece (6). A plurality of water outlet pipes (2) are fixedly connected to one side of the test box (1), a plurality of filter screens (24) are mounted on the test box (1) and arranged at equal intervals, an installation rod (19) is fixedly connected to each filter screen (24), a plurality of fixing assemblies are arranged on the test box (1), each fixing assembly comprises a horizontal plate (20) fixedly connected with the test box (1), and the horizontal plate (20) is connected with the corresponding installation rod (19) through a plug shaft (15).

2. The device for testing the water stopping effect of a water stopping curtain of a deep foundation pit according to claim 1, characterized in that A plurality of symmetrically arranged fixing plates (5) are fixedly connected to the test box (1), a sliding rod (10) is slidably connected to each fixing plate (5), the sliding rod (10) is connected with the fixing plate (5) through a second spring (8), a moving block (7) is fixedly connected to each sliding block (25), a clamping groove is formed in the moving block (7), and the sliding rod (10) is clamped with the moving block (7).

3. The device for testing the water stopping effect of a water stopping curtain of a deep foundation pit according to claim 2, characterized in that, A rotating sleeve (11) is threadedly connected to each sliding rod (10), and the rotating sleeve (11) is used to limit the movement of the sliding rod (10).

4. The device for testing the water stopping effect of a water stopping curtain of a deep foundation pit according to claim 1, characterized in that, A rectangular plate (4) is fixedly connected to one side of the test box (1), a lead screw (18) is rotatably connected to the rectangular plate (4), a fixed block (3) is threadedly connected to the lead screw (18), and the cross section of the fixed block (3) is arranged in a T shape.

5. The device for testing the water stopping effect of a water stopping curtain of a deep foundation pit according to claim 4, characterized in that, A sliding groove (17) is formed in the test box (1), and the fixed block (3) is slidably connected with the sliding groove (17).

6. The device for testing the water stopping effect of a water stopping curtain of a deep foundation pit according to claim 1, characterized in that, A third spring is fixedly connected to each plug shaft (15), and the third spring is fixedly connected with the corresponding horizontal plate (20).

7. The device for testing the water stopping effect of a water stopping curtain of a deep foundation pit according to claim 4, characterized in that, A cross section of the third spring is arranged in a right triangle, and a plurality of extrusion rods are fixedly connected to the fixed block (3) and used in cooperation with the extrusion blocks (14).

8. The device for testing the water stopping effect of a water stopping curtain of a deep foundation pit according to claim 4, characterized in that, The upper end of the screw rod (18) is fixedly connected with a handle (21), a fixed rod (16) is connected with the handle (21) through a reset spring, a plurality of circular grooves are formed in the rectangular plate (4), the fixed rod (16) is clamped with the circular grooves, and the upper end of the fixed rod (16) is rotatably connected with a limiting block (22) which is arranged in an L-shaped cross section, and the limiting block (22) is clamped with the handle (21).

9. The device for testing the water stopping effect of a water stopping curtain of a deep foundation pit according to claim 1, characterized in that, Each of the filter screens (24) is fixedly connected with a sealing gasket (23) which is arranged in a circular ring cross section.

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