High polymer gravel pile test block forming device

Abstract

The utility model discloses a high polymer gravel pile test block forming device which comprises a base, a cylinder body, a sealing cover, a ventilation unit and a monitoring unit, and the base is connected with the sealing cover through a first screw rod; the ventilation unit comprises a ventilation pump and at least two ventilation openings formed in the barrel, and at least one ventilation opening is connected with the ventilation pump through a pipeline; the monitoring unit comprises a controller, a temperature sensor and a pressure monitoring unit, the pressure monitoring unit comprises a soil pressure box, a protection piece and a flange blind plate, the flange blind plate is fixedly connected with the sealing cover through a second screw rod, and the grouting pipe sequentially penetrates through the sealing cover, the protection piece and a flange from top to bottom. The temperature sensor is used for monitoring the temperature in the forming process of the test block, the soil pressure box is used for monitoring the pressure, heat in the cylinder is pumped out by combining the temperature and pressure change conditions and by means of the ventilation pump, forming of the high polymer test block is accelerated, and the forming quality of the test block is ensured; and the influence of different grouting amounts on the forming temperature and expansive force of the test block can be determined.

Description

Technical Field

[0001] The utility model relates to the field of manufacturing pile foundation test blocks, in particular to a polymer crushed stone pile test block molding device. Background Art

[0002] Gravel piles are a common method for dealing with soft foundations in highway projects. Traditional gravel piles are mainly made of crushed stone and / or pebbles as the main raw materials. In actual projects, they have the following defects: complex construction, large amounts of sewage and sludge, poor soil restraint on gravel piles, which restricts the vertical bearing capacity of the piles, and the pile body is composed only of graded gravel, which has no bonding strength and requires the hoop effect of the soil between the piles to provide lateral restraint.

[0003] In order to overcome the defects of traditional gravel piles, some studies have pointed out that high polymers can be used as binders to bind graded gravel particles together, fill the pores in the gravel particles, and achieve drainage, exhaust and compaction of the soil, thereby forming high polymer gravel piles with stable structure and high compressive strength. For high polymer gravel piles, performance tests are often required before construction to obtain relevant test data. However, the existing molding devices often cannot discharge heat in time during use, which not only affects the reliability of the mechanical test results of the specimens, but also increases the molding time of the test blocks; the existing molding devices cannot assist in determining the expansion force during the molding process, nor can they determine the relationship between the grouting volume and the temperature change of the test blocks. Summary of the invention

[0004] In view of this, the utility model proposes a polymer gravel pile test block forming device, which can not only discharge heat in time, but also obtain the temperature and expansion force during the forming process, which is helpful to determine the influence of grouting amount on temperature and the relationship between grouting amount and expansion force.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The polymer gravel pile test block forming device described in the utility model comprises a base, a cylinder body clamped in the base, a sealing cover arranged on the top of the cylinder body, a ventilation unit and a monitoring unit. The cylinder body is a split structure, which is formed by connecting at least two arc-shaped plates. The upper part of the sealing cover has an upper limit groove matched with the cylinder body, and the upper part of the cylinder body is clamped in the upper limit groove; the upper surface of the base has a lower limit groove matched with the cylinder body, and the lower part of the cylinder body is clamped in the lower limit groove. The base and the sealing cover are connected by a first screw.

[0007] The ventilation unit comprises a ventilation pump and at least two ventilation ports arranged on the cylinder, wherein at least one of the ventilation ports is connected to the ventilation pump through a pipeline;

[0008] The monitoring unit includes a controller, a temperature sensor arranged on the cylinder and a pressure monitoring unit arranged below the sealing cover. The pressure monitoring unit includes an earth pressure box, a protective member and a flange blind plate arranged below the sealing cover from top to bottom. The flange blind plate is fixedly connected to the sealing cover by a second screw. The grouting pipe passes through the sealing cover, the protective member and the flange from top to bottom. The signal output end of the earth pressure box and the signal output end of the temperature sensor are both connected to the signal input end of the controller.

[0009] The beneficial effects are as follows: the utility model utilizes a temperature sensor to monitor the temperature during the test block formation process, utilizes an earth pressure box to monitor the pressure in the cylinder, and when the pressure and temperature in the cylinder remain unchanged, the vents are opened and one of the vents is connected to an air pump, and the air pump is utilized to quickly extract the heat in the cylinder, thereby accelerating the molding of the high polymer test block and ensuring the molding quality; in addition, the utility model can also change the grouting amount to determine the influence of different grouting amounts on the molding temperature, and the influence of different grouting amounts on the expansion force.

[0010] The utility model is provided with a protective member under the earth pressure box, the protective member is made of high temperature resistant material and can protect the earth pressure box; during the forming process, the utility model can use the earth pressure box for real-time monitoring, and can determine the relationship between different grouting amounts and the expansion force during the test block forming process by changing the grouting amount.

[0011] Preferably, the protective member comprises an insulating plate and a silicone plate arranged at the bottom of the insulating plate, wherein the diameters of the insulating plate and the silicone plate are both larger than the diameter of the earth pressure box, and the diameters of the insulating plate and the silicone plate are smaller than the inner diameter of the cylinder. In actual installation, the insulating plate is preferably a high-temperature resistant insulating plate, and the silicone plate is preferably a high-temperature resistant silicone plate, so as to protect the earth pressure box from the influence of the molding temperature.

[0012] Preferably, the cylinder comprises two arc-shaped plates, the arc-shaped plates are in a semicircular structure, and the two arc-shaped plates are buckled together. The connecting edges of the two arc-shaped plates are preferably connected by mortise and tenon joints to effectively ensure the integrity of the cylinder.

[0013] Compared with the prior art, the utility model uses a temperature sensor to monitor the temperature during the test block formation process, and uses an earth pressure box to monitor the pressure in the cylinder. When the pressure and temperature in the cylinder remain unchanged, the vents are opened and one of the vents is connected to a vacuum pump. The vacuum pump is used to quickly extract the heat in the cylinder, thereby accelerating the molding of the high polymer test block and ensuring the molding quality. In addition, the utility model can also change the grouting amount to determine the influence of different grouting amounts on the molding temperature and the influence of different grouting amounts on the expansion force.

[0014] The utility model is provided with a protective member under the earth pressure box, the protective member is made of high temperature resistant material and can protect the earth pressure box; during the forming process, the utility model can use the earth pressure box for real-time monitoring, and can determine the relationship between different grouting amounts and the expansion force during the test block forming process by changing the grouting amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a cross-sectional schematic diagram of the cylinder in the utility model.

[0017] Figure 3 It is a connection diagram of the sealing cover and the pressure monitoring unit of the utility model.

[0018] Figure 4 yes Figure 3 Top view of the .

[0019] Figure 5 It is a schematic diagram of the molding state of the polymer gravel column specimen. DETAILED DESCRIPTION

[0020] The following is a detailed description of an embodiment of the utility model in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the utility model, and a detailed implementation method and a specific operation process are given, but the protection scope of the utility model is not limited to the following embodiment.

[0021] It should be noted that, in the description of the present utility model, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0022] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connection" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] like Figure 1As shown, the polymer gravel pile test block forming device described in the utility model includes a base 1, a cylinder 2, a sealing cover 3, a ventilation unit and a monitoring unit. The cylinder 2 is a split structure, which includes two arc-shaped plates with the same structure and a semicircular structure, and the two arc-shaped plates are buckled together; the upper part of the sealing cover 3 has an upper limit groove A that matches the cylinder 2, and the upper part of the cylinder 2 is clamped in the upper limit groove A; the upper surface of the base 1 has a lower limit groove B that matches the cylinder 2, and the lower part of the cylinder 2 is clamped in the lower limit groove B, and the base 1 and the sealing cover 3 are connected by a first screw L1. The cylinder 2, base 1 and sealing cover 3 of the utility model are detachably connected, and the cylinder 2 is a split structure, which is convenient for taking out. In actual processing, an inner step is processed on each connecting edge of one of the arc plates, and an outer step that matches the inner step is processed on each connecting edge of the other arc plate, so that the two arc plates are clamped together by a mortise and tenon structure, see details. Figure 2 .

[0024] Combination Figure 1 It can be seen that the ventilation unit includes a ventilation pump 11 and two ventilation ports 4 (of course, there can also be three or more ventilation ports) arranged on the cylinder 2. During the grouting process, the two ventilation ports will be blocked with sealing plugs. When the temperature and pressure in the cylinder 2 no longer change, the two ventilation ports 4 will be opened at the same time, and one of the ventilation ports 4 will be connected to the ventilation pump 11 through a pipeline. The ventilation pump 11 is used to extract the heat in the cylinder 2, and fresh air is added through the other ventilation port 4 to achieve timely heat dissipation and accelerate molding. It is particularly suitable for polymer adhesive materials with good air permeability, such as polyurethane.

[0025] Combination Figure 1 , 3 -4, it can be seen that the monitoring unit includes a controller, a temperature sensor 5 arranged on the cylinder 2 and a pressure monitoring unit arranged below the sealing cover 3. The pressure monitoring unit includes an earth pressure box 6, a protective member and a flange blind plate 7 arranged below the sealing cover 3 from top to bottom. The protective member includes an insulating plate 8 and a silicone plate 9 arranged at the bottom of the insulating plate 8. The diameters of the insulating plate 8 and the silicone plate 9 are both larger than the diameter of the earth pressure box 6, and the diameters of the insulating plate 8 and the silicone plate 9 are smaller than the inner diameter of the cylinder 2. The insulating plate 8 and the silicone plate 9 are provided with through holes corresponding to the mounting holes on the flange blind plate 7 one by one, so that the insulating plate 8, the silicone plate 9, the flange blind plate 7 and the sealing cover 3 are connected by the second screw L2;

[0026] The signal output end of the soil pressure box 6 and the signal output end of the temperature sensor 5 are connected to the signal input end of the controller (with a display screen). The controller is used to convert the pressure signal and the temperature signal into temperature values ​​and pressure values, and display them on the display screen, so as to facilitate viewing and recording the temperature and pressure during the molding process;

[0027] The pressure monitoring unit is located inside the cylinder 2. The flange blind plate 7 and the cylinder 2 form a molding chamber. A grouting pipe 10 is inserted on the sealing cover 3. The lower part of the grouting pipe 10 passes through the insulating plate 8, the silicone plate 9, the flange blind plate 7 in sequence and enters the molding chamber, so that the high polymer binder can smoothly enter the molding chamber.

[0028] The specific process of making a test block of a high polymer gravel pile using the utility model is as follows: the arc-shaped plates are assembled together to obtain a cylinder 2, and the lower part of the cylinder 2 is clamped in the lower limit groove B of the base 1, and the graded gravel (the graded gravel is made of basalt or limestone, etc., with a particle size range of 16-31.5mm) is placed in the cylinder 2, ensuring that the height of the graded gravel is located below the flange blind plate 7;

[0029] The pressure monitoring unit is fixed on the sealing cover 3 by the second screw L2, and the sealing cover 3 is placed on the top of the cylinder 2 so that the pressure monitoring unit is located in the upper space inside the cylinder 2. The sealing cover 3 and the base 1 are then fixed together by the first screw L1 to fix the cylinder 2. The temperature sensor 5 is inserted into the cylinder and the initial temperature of the cylinder is recorded.

[0030] The grouting pipe 10 is inserted into the cylinder 2 from top to bottom, and a high polymer cementing material is injected into the cylinder 2 using a grouting gun. The cementing material infiltrates into the gravel from top to bottom. The specific process is shown in FIG. Figure 5 The high polymer cementing material (polyurethane with good air permeability is selected to ensure air permeability) fully reacts in the cylinder 2 to avoid material waste caused by reaction volume expansion;

[0031] During the grouting process, the temperature sensor 5 monitors the temperature inside the cylinder 2 in real time, and the soil pressure box 6 monitors the pressure (i.e., expansion force) during the molding process. When the temperature and pressure no longer change, the two vents are opened, and the heat in the cylinder 2 is extracted by the ventilation pump, and fresh air is added through the other vent 4 to achieve timely heat dissipation and accelerate molding.

[0032] In actual engineering, the influence of grouting amount on the test block forming temperature and the relationship between grouting amount and expansion force during the test block formation process can be calculated by obtaining the temperature and expansion force corresponding to different grouting amounts.

[0033] It should be pointed out that the controller in the present invention can be a general-purpose processor, a special-purpose processor, a conventional processor, a digital signal processor (DSP), multiple microprocessors, one or more microprocessors associated with a DSP core, a controller, a microcontroller, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) circuit, any other type of integrated circuit (IC) and a state machine, etc.; it can also be a single-chip microcomputer (PLC) or an industrial computer with computer properties and characteristics.

[0034] Finally, it should be emphasized that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Therefore, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A polymer gravel pile test block forming device, characterized in that: It comprises a base, a cylinder body clamped in the base, a sealing cover arranged on the top of the cylinder body, a ventilation unit and a monitoring unit. The cylinder body is a split structure, which is connected by at least two arc-shaped plates. The upper part of the sealing cover has an upper limit groove matched with the cylinder body, and the upper part of the cylinder body is clamped in the upper limit groove; the upper surface of the base has a lower limit groove matched with the cylinder body, and the lower part of the cylinder body is clamped in the lower limit groove. The base and the sealing cover are connected by a first screw. The ventilation unit comprises a ventilation pump and at least two ventilation ports arranged on the cylinder, wherein at least one of the ventilation ports is connected to the ventilation pump through a pipeline; The monitoring unit includes a controller, a temperature sensor arranged on the cylinder and a pressure monitoring unit arranged below the sealing cover. The pressure monitoring unit includes an earth pressure box, a protective member and a flange blind plate arranged below the sealing cover from top to bottom. The flange blind plate is fixedly connected to the sealing cover by a second screw. The grouting pipe passes through the sealing cover, the protective member and the flange from top to bottom. The signal output end of the earth pressure box and the signal output end of the temperature sensor are both connected to the signal input end of the controller.

2. The polymer gravel pile test block forming device according to claim 1 is characterized by: The protective member comprises an insulating plate and a silicone plate arranged at the bottom of the insulating plate, wherein the diameters of the insulating plate and the silicone plate are both larger than the diameter of the earth pressure box, and the diameters of the insulating plate and the silicone plate are smaller than the inner diameter of the cylinder.

3. The polymer gravel pile test block forming device according to claim 1 is characterized by: The cylinder comprises two arc-shaped plates, which are in a semicircular structure and are buckled together.

Images