Static pressure detection device for bearing capacity of underground building bearing column

Abstract

The invention discloses an underground building bearing column bearing capacity static pressure detection device, and relates to the technical field of pressure detection devices. According to the static pressure detection device for the bearing capacity of the underground building bearing column, the protective cover is arranged, so that debris bursting caused by damage of a core sample due to excessive pressure in the detection process can be prevented, and the safety of detection personnel is protected; the pressing unit is arranged and provided with a lead screw, a hydraulic machine and a pressing plate, the bottom of the pressing plate is connected with a pressure sensor, the position of the pressing unit can be adjusted through the lead screw, and the device can be conveniently suitable for core samples of different sizes; the lead screw and the hydraulic machine cooperate with each other, the hydraulic machine serves as main pressure output, the lead screw can accurately adjust the output pressure, and the static pressure detection accuracy of the device is improved. The deformation detection unit is arranged, a dial indicator is used for carrying out deformation detection on the core sample in the detection process, and the precision of a core sample detection result is improved by combining deformation detection with static pressure detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pressure detection devices, in particular to a static pressure detection device for bearing capacity of a bearing column of an underground building. BACKGROUND

[0002] In underground construction engineering, bearing columns bear the key load support function, and accurate assessment of their bearing capacity is crucial to ensure the safety of building structures.

[0003] The conventional static pressure detection device for bearing capacity of a bearing column of an underground building requires the erection of a field reference beam and the arrangement of anchor piles, reference piles and test piles. The device has a large size and poor overall structure, requires high installation accuracy, and has complex installation and arrangement operations, which are prone to deviation and affect the measurement results. The conventional static pressure detection device has complex installation and arrangement operations, requires high quality of detection personnel, increases the time for on-site device layout, affects detection efficiency, and increases detection costs. The detection device has high requirements for the use site, and the detection results are unreliable in new fill soil and waterlogged soil environments. The limited space of underground buildings makes it inconvenient to use large-size detection devices.

[0004] The conventional static pressure detection device has a large size, and it is difficult to accurately control the size, direction and pressure application speed of the load force during the loading process, resulting in large deviations in the detection results. The conventional static pressure detection device has complex installation and arrangement operations, requires high quality of detection personnel, increases the difficulty of using the device, and increases the detection cost. The overall stability and portability of the device are poor, and its use is limited in complex underground environments. SUMMARY

[0005] To overcome the deficiencies of the prior art, the present application provides a static pressure detection device for bearing capacity of a bearing column of an underground building, which solves the problems of the conventional static pressure detection device, such as large size, difficulty in accurately controlling the size, direction and pressure application speed of the load force during the loading process, resulting in large deviations in the detection results; complex installation and arrangement operations, high quality requirements for detection personnel, increased difficulty of using the device, increased detection cost; poor overall stability and portability of the device, and limited use in complex underground environments.

[0006] To achieve the above purpose, the present application is implemented by the following technical scheme: a static pressure detection device for bearing capacity of a bearing column of an underground building, comprising a protective cover, a pressure platform, a pressure application unit, a deformation measurement unit and a core sample, the protective cover being sleeved on the outside of the pressure platform, the pressure application unit, the deformation measurement unit and the core sample being located on the inside of the pressure platform, characterized in that the pressure application unit comprises:

[0007] a lead screw, the lead screw having a sleeve at the bottom;

[0008] a hydraulic machine, the hydraulic machine being inserted into the inside of the sleeve;

[0009] A pressing plate is connected with a positioning ring at the top, the positioning ring is sleeved outside the output end of the hydraulic machine, and a pressure sensor is connected with the pressing plate at the bottom;

[0010] The pressing table, the pressing unit and the deformation measuring unit are all connected with a processor, the pressing unit is used for pressing the core sample and collecting the pressure value borne by the core sample, the deformation measuring unit is used for measuring the deformation degree of the core sample in the detection process and collecting the deformation value of the core sample, the processor controls the position and the pressure applied by the pressing unit according to the pressure value, and the processor judges whether the quality of the core sample is qualified according to the pressure value and the deformation value.

[0011] Preferably, the protective cover is provided with a fixed cover, a movable door and a hinge, the hinge is connected outside the fixed cover and the movable door, and the movable door can be opened and closed around the hinge.

[0012] Preferably, the pressing table is provided with a base, the base is located below the protective cover, a limiting clamping seat is inserted at the top of the base, the limiting clamping seat is sleeved outside the core sample, a lower limiting strip is connected at the top of the base, and the lower limiting strip is located outside the limiting clamping seat and clamped inside the fixed cover.

[0013] Preferably, the pressing table is provided with a sliding guide rod, the sliding guide rod is connected at the top of the base, a fixed plate is connected at the top of the sliding guide rod, the fixed plate is located at the top of the protective cover, and an adjusting motor is arranged at the bottom of the fixed plate.

[0014] Preferably, a fixed block is connected outside the adjusting motor, a connecting bolt is inserted in the fixed block, the connecting bolt is threadedly connected with the fixed plate through the fixed block, a transmission gear is sleeved on the output end of the adjusting motor and passes through the fixed plate, the transmission gear is located above the fixed plate, an upper limiting strip is connected at the bottom of the fixed plate, and the upper limiting strip is located outside the adjusting motor and clamped inside the protective cover.

[0015] Preferably, a positioning sleeve is sleeved outside the lead screw, the positioning sleeve is inserted inside the fixed plate, and a linkage gear is sleeved outside the positioning sleeve and engaged with the transmission gear.

[0016] Preferably, the deformation measuring unit is provided with a positioning rod, a rotating rod and a dial indicator, the positioning rod is inserted inside the pressing plate and connected with the base and the fixed plate, an adjusting clamping head is sleeved outside the positioning rod, and a first insertion block is connected outside the adjusting clamping head.

[0017] Preferably, the rotating rod is sleeved with a sleeve card outside, two groups of the sleeve card are arranged, the sleeve card is sleeved with a fixing screw inside, the sleeve card is provided with a sleeve hole, the sleeve hole of one group of the sleeve card is sleeved outside the first plug-in block, and the fixing screw penetrates the sleeve card and abuts against the first plug-in block.

[0018] Preferably, the dial gauge is connected with a second plug-in block outside, the second plug-in block is plugged into the sleeve hole of the other group of the sleeve card, and abuts against the fixing screw plugged into the sleeve card.

[0019] Preferably, the processor controls the static pressure detection device to work, after the core sample is plugged into the limiting clamp seat, the device is started, the processor controls the pressure applying unit to descend, when the pressure sensor feeds back pressure, the pressure applying unit stops descending and starts the hydraulic machine, when the pressure sensor feeds back that the pressure reaches the set threshold value of the core sample, the hydraulic machine remains stationary while the lead screw starts to work, the pressure applied to the core sample by the pressure applying unit is accurately adjusted, and the core sample is damaged.

[0020] The underground building load-bearing column bearing capacity static pressure detection device has the following beneficial effects:

[0021] The protective cover is arranged, debris caused by damage of the core sample in the detection process due to excessive pressure can be prevented from splashing, and the safety of the detection personnel is protected; the pressure applying unit is arranged, the pressure applying unit is provided with a lead screw, a hydraulic machine and a pressure applying plate, the pressure applying plate is connected with a pressure sensor at the bottom, the position of the pressure applying unit can be adjusted by the lead screw, so that the device is suitable for core samples of different sizes; the lead screw and the hydraulic machine cooperate with each other, the hydraulic machine serves as a main pressure output, the output pressure can be accurately adjusted by the lead screw, and the accuracy of static pressure detection of the device is improved; the deformation detection unit is arranged, the core sample in the detection process is detected by the dial gauge, and the deformation detection combined with the static pressure detection improves the accuracy of the detection result of the core sample. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0024] Figure 2 It is a schematic diagram of the structure of the protective cover of the present application;

[0025] Figure 3 It is a schematic diagram of the structure of the pressure applying table of the present application;

[0026] Figure 4 Structure diagram of the adjusting motor of the present application;

[0027] Figure 5 Structure diagram of the pressure applying unit of the present application;

[0028] Figure 6 Structure diagram of the bottom of the pressure applying unit of the present application;

[0029] Figure 7 Structure diagram of the deformation measuring unit of the present application;

[0030] Figure 8 Flow chart of the operation of the present application.

[0031] In the figure: 1, protective cover; 11, fixed cover; 12, movable door; 13, hinge; 2, pressure applying platform; 21, base; 211, limiting seat; 212, lower limiting strip; 22, sliding guide rod; 23, fixed plate; 231, adjusting motor; 2311, fixed block; 2312, connecting bolt; 2313, transmission gear; 232, upper limiting strip; 3, pressure applying unit; 31, lead screw; 311, positioning sleeve; 312, linkage gear; 313, clamping sleeve; 32, hydraulic machine; 33, pressure applying plate; 331, positioning ring; 332, pressure sensor; 4, deformation measuring unit; 41, positioning rod; 411, adjusting chuck; 412, first plug-in block; 42, rotating rod; 421, sleeve clamp; 422, fixing screw; 423, sleeve hole; 43, dial gauge; 431, second plug-in block; 5, core sample. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are 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.

[0033] The underground building load-bearing column bearing capacity static pressure detection device provided by the embodiments of the present application solves the problems that the traditional static pressure detection device is difficult to accurately control the size, direction and pressure applying speed of the loading force in the loading process due to its huge size, resulting in a large deviation of the detection result; the traditional static pressure detection device has complex installation and arrangement operation, and has high requirements for the quality of the detection personnel, thereby increasing the use difficulty of the device and the detection cost; the stability and portability of the device as a whole are poor, and the use of the device is limited in the complex underground environment; the embodiments of the present application improve the accuracy of the detection result, reduce the operation difficulty and detection cost, and improve the stability and portability of the detection device for convenient use.

[0034] The underground building bearing column bearing capacity static pressure detection device is disclosed.

[0035] Embodiment one

[0036] According to the drawings Figures 1-8 As shown, including protective cover 1, pressurized platform 2, pressure unit 3, deformation measurement unit 4 and core sample 5, protective cover 1 is sleeved outside pressurized platform 2, pressure unit 3, deformation measurement unit 4 and core sample 5 are located inside pressurized platform 2, pressure unit 3 includes:

[0037] Lead screw 31, the bottom of lead screw 31 is sleeved with a sleeve 313;

[0038] Hydraulic machine 32, hydraulic machine 32 is inserted inside the sleeve 313;

[0039] Pressure plate 33, the top of pressure plate 33 is connected with positioning ring 331, positioning ring 331 is sleeved outside the output end of hydraulic machine 32, the bottom of pressure plate 33 is connected with pressure sensor 332;

[0040] Pressurized platform 2, pressure unit 3 and deformation measurement unit 4 are all connected with processor, pressure unit 3 is used for pressing core sample 5 and collecting the pressure value borne by core sample 5, deformation measurement unit 4 is used for measuring the deformation degree of core sample 5 in the detection process and collecting the deformation value of core sample 5, the processor controls the position and the size of the pressure applied by pressure unit 3 according to the pressure value, and the processor judges whether the quality of core sample 5 is qualified according to the pressure value and the deformation value.

[0041] The protective cover 1 is provided, which can prevent the debris from shooting due to the damage of the core sample 5 caused by excessive pressure in the detection process, and protect the safety of the detection personnel; the pressure unit 3 is provided, the pressure unit 3 is provided with the lead screw 31, the hydraulic machine 32 and the pressure plate 33, the bottom of the pressure plate 33 is connected with the pressure sensor 332, the position of the pressure plate 33 can be adjusted by the lead screw 31, which facilitates the device to be applicable to core samples 5 of different sizes; the lead screw 31 and the hydraulic machine 32 cooperate with each other, the hydraulic machine 32 serves as the main pressure output, the lead screw 31 can accurately adjust the output pressure, thereby improving the accuracy of the static pressure detection of the device; the deformation measurement unit 4 is provided, the deformation of the core sample 5 in the detection process is detected by the dial gauge 43, and the deformation detection combined with the static pressure detection improves the accuracy of the detection result of the core sample 5.

[0042] Further, the protective cover 1 is provided with a fixed cover 11, a movable door 12 and a hinge 13, the hinge 13 is connected outside the fixed cover 11 and the movable door 12, the movable door 12 can be opened and closed around the hinge 13, the protective cover 1 can provide a closed space for the core sample 5 detection, prevent the core sample 5 from being damaged by pressure to generate debris shooting, protect the personal safety of the detection personnel, and the protective cover 1 is designed of transparent and impact-resistant material, thereby improving the safety of the device.

[0043] Further, the pressing table 2 is provided with a base 21 located below the protective cover 1, the top of the base 21 is inserted into a limiting card seat 211, the limiting card seat 211 is sleeved outside the core sample 5, and the top of the base 21 is connected with a lower limiting strip 212 located outside the limiting card seat 211 and clamped inside the fixed cover 11.

[0044] Further, the pressing table 2 is provided with a sliding guide rod 22 inserted into the inside of the pressing plate 33, the sliding guide rod 22 is connected to the top of the base 21, the top of the sliding guide rod 22 is connected with a fixed plate 23 located at the top of the protective cover 1, and the bottom of the fixed plate 23 is provided with an adjusting motor 231. The sliding guide rod 22 can provide a directional sliding track for the pressing plate 33, prevent the pressing plate 33 from rotating when the lead screw 31 rotates, avoid affecting the detection, and ensure the accuracy of the detection result.

[0045] In particular, the adjusting motor 231 is connected with a fixed block 2311 outside, the fixed block 2311 is inserted with a connecting bolt 2312 inside, the connecting bolt 2312 is threaded connected with the fixed plate 23 penetrating through the fixed block 2311, the output end of the adjusting motor 231 penetrates through the fixed plate 23 and is sleeved with a transmission gear 2313, the transmission gear 2313 is located above the fixed plate 23, and the bottom of the fixed plate 23 is connected with an upper limiting strip 232 located outside the adjusting motor 231 and clamped inside the protective cover 1.

[0046] In particular, the lead screw 31 is sleeved with a positioning sleeve 311 outside, the positioning sleeve 311 is inserted into the inside of the fixed plate 23, and the positioning sleeve 311 is sleeved with a linkage gear 312 outside, the linkage gear 312 is meshed and connected with the transmission gear 2313, and the positioning sleeve 311 and the fixed plate 23 are connected by bearings.

[0047] In particular, the deformation measurement unit 4 is provided with a positioning rod 41, a rotating rod 42 and a dial gauge 43, the positioning rod 41 is inserted into the inside of the pressing plate 33 and connected with the base 21 and the fixed plate 23, the positioning rod 41 is sleeved with an adjusting chuck 411 outside, the adjusting chuck 411 is connected with a first insertion block 412 outside, and the adjusting chuck 411 can be adjusted up and down on the positioning rod 41, which is convenient for adjusting the height of the dial gauge 43.

[0048] It needs to be particularly emphasized that the rotating rod 42 is sleeved with a sleeve card 421, the sleeve card 421 is provided with two groups, the sleeve card 421 is sleeved with a fixing screw 422 on the inner side, the sleeve card 421 is provided with a sleeve hole 423, the sleeve hole 423 of one group of the sleeve card 421 is sleeved on the outer side of the first plug-in block 412, the fixing screw 422 penetrates the sleeve card 421 and abuts with the first plug-in block 412, the rotating rod 42 can rotate and adjust around the first plug-in block 412, which is convenient for adjusting the horizontal position of the dial gauge 43.

[0049] It needs to be particularly emphasized that the dial gauge 43 is connected with a second plug-in block 431 on the outer side, the second plug-in block 431 is inserted into the sleeve hole 423 of the other group of the sleeve card 421, and abuts with the fixing screw 422 inserted on the sleeve card 421, the dial gauge 43 can rotate in the sleeve hole 423, which is convenient for the vertical contact of the dial gauge 43 with the surface of the core sample 5 after position adjustment.

[0050] It needs to be particularly emphasized that the connection processor controls the static pressure detection device to work, after the core sample 5 is inserted into the limiting card seat 211, the device is started, the processor controls the pressure applying unit 3 to descend, when the pressure sensor 332 feedbacks pressure, the pressure applying unit 3 stops descending and starts the hydraulic machine 32, when the pressure sensor 332 feedbacks that the pressure reaches the set threshold value of the core sample 5, the hydraulic machine 32 remains stationary while the lead screw 31 starts to work, accurately adjusts the pressure applied by the pressure applying unit 3 to the core sample 5, until the core sample 5 is damaged.

[0051] Example two

[0052] According to the drawings Figures 1-8 It is shown that it includes a protective cover 1, a pressurizing table 2, a pressure applying unit 3, a deformation measuring unit 4 and a core sample 5, the protective cover 1 is sleeved on the outer side of the pressurizing table 2, the pressure applying unit 3, the deformation measuring unit 4 and the core sample 5 are located on the inner side of the pressurizing table 2, the pressure applying unit 3 includes:

[0053] The lead screw 31 is sleeved with a sleeve 313 on the bottom;

[0054] The hydraulic machine 32 is inserted into the inner side of the sleeve 313;

[0055] The pressure applying plate 33 is connected with a positioning ring 331 on the top, the positioning ring 331 is sleeved on the outer side of the output end of the hydraulic machine 32, the pressure applying plate 33 is connected with a pressure sensor 332 on the bottom;

[0056] The pressurizing table 2, the pressure applying unit 3 and the deformation measuring unit 4 are connected with a processor, the pressure applying unit 3 is used for applying pressure to the core sample 5 and collecting the pressure value borne by the core sample 5, the deformation measuring unit 4 is used for measuring the deformation degree of the core sample 5 in the detection process and collecting the deformation value of the core sample 5, the processor controls the position and the pressure applying size of the pressure applying unit 3 according to the pressure value, and the processor judges whether the core sample 5 is qualified according to the pressure value and the deformation value.

[0057] It should be particularly emphasized that the present application also provides a control method of the underground building load-bearing column bearing capacity static pressure detection device, comprising:

[0058] Step one: start the device, the processor controls the adjusting motor 231 to drive the linkage gear 312 through the transmission gear 2313, so as to drive the lead screw 31, and the lead screw 31 drives the hydraulic machine 32 and the pressure plate 33 to move downward.

[0059] Step two: when the pressure sensor 332 at the bottom of the pressure plate 33 does not contact the core sample 5, the pressure sensor 332 feeds back to the processor, and the lead screw 31 continues to move downward; when the pressure sensor 332 contacts the core sample 5, the pressure sensor 332 feeds back to the processor, and the lead screw 31 stops moving downward.

[0060] Step three: the processor controls the hydraulic machine 32 to start working and push the pressure plate 33 to move downward, when the pressure sensor 332 does not reach the preset pressure threshold value and the core sample 5 is damaged, the processor determines that the core sample 5 is unqualified; when the pressure sensor 332 reaches the preset pressure threshold value and the core sample 5 is not damaged, the processor controls the hydraulic machine 32 to stop working.

[0061] Step four: the processor controls the lead screw 31 to continue to move downward, and the core sample 5 is continuously detected by applying pressure, and the deformation of the core sample 5 is detected by the dial gauge 43.

[0062] Step five: when the core sample 5 is damaged and the deformation does not exceed the safety value, it is determined that the core sample 5 is qualified, and the maximum pressure value borne by the core sample 5 is output; when the deformation of the core sample 5 exceeds the safety value, it is determined that the core sample 5 is unqualified.

[0063] Working principle:

[0064] The protective cover 1 is provided, the protective cover 1 provides a closed space for the core sample 5 detection, can prevent the core sample 5 from being damaged due to excessive pressure in the detection process, and can prevent the debris from splashing, thereby protecting the safety of the detection personnel;

[0065] The pressure applying unit 3 is provided with a lead screw 31, a hydraulic machine 32 and a pressure applying plate 33, the bottom of the pressure applying plate 33 is connected with a pressure sensor 332, the position of the pressure applying plate 33 can be adjusted by the lead screw 31, so that the device is suitable for core samples 5 of different sizes; the lead screw 31 and the hydraulic machine 32 cooperate with each other, the hydraulic machine 32 is the main pressure output, and the lead screw 31 can accurately adjust the output pressure, thereby improving the accuracy of the static pressure detection of the device.

[0066] The deformation measuring unit 4 is provided, the core sample 5 in the detection process is detected by the dial indicator 43, and the deformation detection and the static pressure detection improve the accuracy of the detection result of the core sample 5.

[0067] The basic principle and main features of the application and the advantages of the application are shown and described. It should be understood by those skilled in the art that the application is not limited to the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the application, and various changes and improvements can be made without departing from the spirit and scope of the application, and these changes and improvements all fall within the scope of the application. The scope of protection of the application is defined by the appended claims and their equivalents.

Claims

1. A static pressure detection device for the bearing capacity of a load-bearing column of an underground building, comprising a protective cover (1), a pressure platform (2), a pressure unit (3), a deformation measurement unit (4) and a core sample (5), wherein the protective cover (1) is sleeved on the outside of the pressure platform (2), and the pressure unit (3), the deformation measurement unit (4) and the core sample (5) are located on the inside of the pressure platform (2), characterized in that: The pressure applying unit (3) comprises: A screw rod (31), wherein a ferrule (313) is sleeved on the bottom of the screw rod (31); A hydraulic press (32), wherein the hydraulic press (32) is inserted into the inner side of the ferrule (313); A pressure plate (33), the top of the pressure plate (33) is connected to a positioning ring (331), the positioning ring (331) is sleeved on the outside of the output end of the hydraulic press (32), and the bottom of the pressure plate (33) is connected to a pressure sensor (332); The pressurizing platform (2), the pressure-applying unit (3) and the deformation measurement unit (4) are all connected to a processor; the pressure-applying unit (3) is used to apply pressure to the core sample (5) and collect the pressure value borne by the core sample (5); the deformation measurement unit (4) is used to measure the degree of deformation of the core sample (5) during the detection process and collect the deformation value of the core sample (5); the processor controls the position of the pressure-applying unit (3) and the magnitude of the applied pressure according to the pressure value; and the processor determines whether the quality of the core sample (5) is qualified according to the pressure value and the deformation value.

2. The static pressure detection device for the bearing capacity of underground building load-bearing columns according to claim 1, characterized in that: The protective cover (1) is provided with a fixed cover (11), a movable door (12) and a hinge (13); the hinge (13) is connected to the outside of the fixed cover (11) and the movable door (12); and the movable door (12) can be opened and closed around the hinge (13).

3. The static pressure detection device for the bearing capacity of the load-bearing columns of underground buildings according to claim 2, characterized in that: The pressurizing platform (2) is provided with a base (21), the base (21) is located below the protective cover (1), a limit clamping seat (211) is inserted into the top of the base (21), the limit clamping seat (211) is sleeved on the outside of the core sample (5), and a lower limit bar (212) is connected to the top of the base (21), the lower limit bar (212) is located outside the limit clamping seat (211) and is clamped on the inside of the fixed cover (11).

4. The static pressure detection device for the bearing capacity of underground building load-bearing columns according to claim 1, characterized in that: The pressurizing platform (2) is provided with a sliding guide rod (22), the sliding guide rod (22) is inserted into the inner side of the pressure plate (33), the sliding guide rod (22) is connected to the top of the base (21), the top of the sliding guide rod (22) is connected to a fixed plate (23), the fixed plate (23) is located at the top of the protective cover (1), and an adjusting motor (231) is provided at the bottom of the fixed plate (23).

5. The static pressure detection device for the bearing capacity of underground building load-bearing columns according to claim 4, characterized in that: The outside of the regulating motor (231) is connected to a fixed block (2311), the inside of the fixed block (2311) is plugged with a connecting bolt (2312), the connecting bolt (2312) passes through the fixed block (2311) and is threadedly connected to the fixed plate (23), the output end of the regulating motor (231) passes through the fixed plate (23) and is sleeved with a transmission gear (2313), the transmission gear (2313) is located above the fixed plate (23), the bottom of the fixed plate (23) is connected to an upper limit bar (232), the upper limit bar (232) is located outside the regulating motor (231) and is clamped to the inside of the protective cover (1).

6. The static pressure detection device for bearing capacity of underground building load-bearing columns according to claim 4, characterized in that: The outer side of the screw rod (31) is sleeved with a positioning sleeve (311), the positioning sleeve (311) is inserted into the inner side of the fixing plate (23), the outer side of the positioning sleeve (311) is sleeved with a linkage gear (312), and the linkage gear (312) is meshed with the transmission gear (2313).

7. The static pressure detection device for bearing capacity of load-bearing columns of underground buildings according to claim 4, characterized in that: The deformation measuring unit (4) is provided with a positioning rod (41), a rotating rod (42) and a dial indicator (43); the positioning rod (41) is inserted into the inner side of the pressure plate (33) and connected to the base (21) and the fixed plate (23); the outer side of the positioning rod (41) is sleeved with an adjusting clamp (411); the outer side of the adjusting clamp (411) is connected to a first plug-in block (412).

8. The static pressure detection device for the bearing capacity of underground building load-bearing columns according to claim 7, characterized in that: The outer side of the rotating rod (42) is sleeved with a sleeve (421), and the sleeve (421) is provided with two groups. The inner side of the sleeve (421) is inserted with a fixing screw (422). The sleeve (421) is provided with a sleeve hole (423). One group of the sleeve holes (423) of the sleeve (421) is sleeved on the outer side of the first plug-in block (412), and the fixing screw (422) passes through the sleeve (421) and abuts against the first plug-in block (412).

9. The static pressure detection device for bearing capacity of load-bearing columns of underground buildings according to claim 7, characterized in that: The outer side of the dial indicator (43) is connected to a second plug-in block (431), which is plugged into a sleeve hole (423) opened in another set of sleeve clamps (421) and abuts against a fixing screw (422) plugged into the sleeve clamps (421).

10. The static pressure detection device for bearing capacity of load-bearing columns of underground buildings according to claim 1, characterized in that: The processor controls the static pressure detection device to operate. After the core sample (5) is inserted into the limit clamp (211), the device is started. The processor controls the pressure unit (3) to descend. When the pressure sensor (332) feedbacks pressure, the pressure unit (3) stops descending and starts the hydraulic press (32). When the pressure feedback from the pressure sensor (332) reaches a set threshold value of the core sample (5), the hydraulic press (32) remains stationary and the screw rod (31) starts working, accurately adjusting the pressure applied by the pressure unit (3) to the core sample (5) until the core sample (5) is damaged.

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