A measuring device for deep bidirectional displacement

Abstract

The present invention discloses a measurement device for deep bidirectional displacement, which comprises a monitoring pipe assembly. An outer sleeve pipe assembly is arranged outside the monitoring pipe assembly. An installation pipe assembly is movably arranged between the monitoring pipe assembly and the outer sleeve pipe assembly. The front end of the installation pipe assembly is a displacement magnetic ring assembly. The monitoring pipe assembly comprises a monitoring pipe body, and an end plug is arranged at the front end of the monitoring pipe body. The outer sleeve pipe assembly comprises an outer sleeve pipe body, a slag blocking ring is arranged at the front end of the outer sleeve pipe body, and a spring rotating window is arranged on the pipe wall at the connection of the outer sleeve pipe body and the slag blocking ring. The installation pipe assembly comprises an installation pipe body, and a magnetic ring holder is arranged at the front end of the installation pipe body. The displacement magnetic ring assembly comprises a displacement magnetic ring body, and spring rotating blades corresponding to the spring rotating windows one by one are arranged on the circumference of the displacement magnetic ring body. The present invention is applicable to both longitudinal displacement monitoring and horizontal displacement monitoring, and has the characteristics of no blind area, convenient installation and accurate installation site.

Description

Technical Field

[0001] The present invention relates to a displacement measuring device, in particular to a measuring device for deep bidirectional displacement. Background Art

[0002] The deep displacement change of the fill project has always been one of the necessary monitoring items during the construction period and even the operation period.

[0003] For the longitudinal deep displacement monitoring, the traditional layered settlement magnetic ring has the following deficiencies in the engineering application process:

[0004] 1. It can only perform one-way displacement monitoring, that is, settlement monitoring. However, upward displacement changes exist in working conditions such as expansive soil foundations, bottoms of deep and large foundation pits, and red clay foundations. Therefore, the traditional layered settlement magnetic ring has "blind spots" in these areas.

[0005] 2. The traditional settlement magnetic ring uses a flexible elastic sheet to conduct the displacement of the measured point to the magnetic ring. The measured displacement value is smaller than the actual displacement and there is a time lag.

[0006] 3. During the installation process of the traditional settlement magnetic ring, collapse of the borehole often occurs, resulting in the magnetic ring being unable to be placed in the predetermined position, causing the direct loss of the measured point data and unable to achieve the expected monitoring purpose.

[0007] For the deep foundation pit deep horizontal displacement change, the traditional method is to drive a borehole on the ground around the deep foundation pit to bury an inclinometer tube for deep horizontal displacement monitoring. The traditional method has the following deficiencies:

[0008] 1. It is necessary to drive a borehole on the ground around the deep foundation pit. However, most of the areas around the municipal foundation pit are roads or buildings in operation, and it is impossible to drive a borehole on the ground to bury the deep inclinometer tube, resulting in the inability to effectively obtain the monitoring data of the key measured points.

[0009] 2. One inclinometer tube must be set for one plane monitoring measured point, increasing the borehole workload around the foundation pit and causing unnecessary work waste.

[0010] 3. During the installation process of the traditional monitoring device, collapse of the borehole often occurs, resulting in the monitoring element being placed in the predetermined position, causing the direct loss of the measured point data and unable to achieve the expected monitoring purpose.

[0011] 4. Due to the difficulty of effectively coupling the bending stiffness of the traditional inclinometer tube with the surrounding rock and soil mass, the measured monitoring value is smaller than the actual displacement value. Summary of the Invention

[0012] The purpose of the present invention is to provide a measuring device for deep bidirectional displacement. The present invention is applicable to both longitudinal displacement monitoring and horizontal displacement monitoring, and has the characteristics of no blind spots, convenient installation, and accurate installation site.

[0013] Technical solution of the present invention: A measurement device for deep double-direction displacement, comprising a monitoring tube assembly. An outer sleeve tube assembly is provided outside the monitoring tube assembly. An installation tube assembly is movably arranged between the monitoring tube assembly and the outer sleeve tube assembly. The front end of the installation tube assembly is a displacement magnetic ring assembly;

[0014] The monitoring tube assembly includes a monitoring tube body, and an end plug is provided at the front end of the monitoring tube body;

[0015] The outer sleeve tube assembly includes an outer sleeve tube body. A slag blocking ring is provided at the front end of the outer sleeve tube body. A spring spiral window is provided on the tube wall at the connection of the outer sleeve tube body and the slag blocking ring;

[0016] The installation tube assembly includes an installation tube body, and a magnetic ring holder is provided at the front end of the installation tube body;

[0017] The displacement magnetic ring assembly includes a displacement magnetic ring body, and spring spiral blades corresponding to the spring spiral windows one by one are provided on the circumference of the displacement magnetic ring body.

[0018] The outer sleeve tube body is consistent with the diameter of the monitoring drilling hole. The outer diameter of the slag blocking ring is slightly smaller than the drilling diameter. The outer sleeve tube body can be installed and removed at any time, and the operation is convenient. It can effectively prevent the adverse effects of hole collapse on the installation of the magnetic ring body, making the installation position of the magnetic ring more accurate; at the same time, technically, it ensures that the direction of the monitoring device always remains vertical, horizontal or oblique.

[0019] For the aforementioned measurement device for deep double-direction displacement, the monitoring tube body, the outer sleeve tube body and the installation tube body are all sectional splicing structures.

[0020] The sectional splicing method can ensure that the monitoring device can make corresponding adjustments according to the change of the monitoring depth, and the practicability is stronger.

[0021] For the aforementioned measurement device for deep double-direction displacement, a chute is provided along the axial direction on the inner wall of the outer sleeve tube body, and the chute corresponds to the spring spiral window one by one. The chute ensures that the magnetic ring body moves in a fixed direction during installation, avoiding displacement and affecting normal installation.

[0022] For the aforementioned measurement device for deep double-direction displacement, the slag blocking ring is connected to the outer sleeve tube body through a first rotary interface.

[0023] For the aforementioned measurement device for deep double-direction displacement, a slag blocking hinge is provided at the front end of the slag blocking ring. The number of sheets of the slag blocking hinge is the same as the number of sheets of the spring spiral blade. A slag blocking hinge positioning pressure strip is provided inside the slag blocking ring. The slag blocking hinge is made of a flexible material, which on the one hand plays a role in blocking slag, and on the other hand does not affect the slag blocking ring to break away from the drilling hole after passing over the magnetic ring body.

[0024] For the aforementioned measurement device for deep double-direction displacement, the magnetic ring holder is connected to the installation tube body through a second rotary interface.

[0025] The aforementioned measuring device for deep bidirectional displacement. At the front end of the magnetic ring holder, there are clamping windows with the same number as the spring blades. At the front end of the clamping windows, there are clamping ejector springs for the holder. The clamping ejector springs for the holder are fixed by fixing screws. The clamping ejector springs for the holder correspond to the spring blades respectively. When in the natural state, the clamping ejector springs for the holder can fix the magnetic ring body. When subjected to a tensile force, they can deform and disengage from the spring blades.

[0026] The aforementioned measuring device for deep bidirectional displacement. There are sliding beads on the outer side of the spring blades to prevent the magnetic ring body from jamming during movement.

[0027] The aforementioned measuring device for deep bidirectional displacement. The spring blades and the displacement magnetic ring body are connected by a spring shaft, and there is a hinge-type spring at the spring shaft.

[0028] The aforementioned measuring device for deep bidirectional displacement. The spring blades are spring-toothed cutters.

[0029] Advantages of the present invention

[0030] Through the above technical solutions, the measuring device of the present invention is applicable to both horizontal displacement monitoring and can also meet the requirements of longitudinal displacement monitoring, and has the advantages of no blind area, convenient installation and accurate installation site. Description of the drawings

[0031] Figure 1 Is the overall front view of the present invention;

[0032] Figure 2 Is the front view of the monitoring pipe assembly;

[0033] Figure 3 Is the front view of the installation pipe assembly;

[0034] Figure 4 Is the front view of the magnetic ring holder;

[0035] Figure 5 Is the front view of the outer sleeve pipe assembly;

[0036] Figure 6 Is Figure 5 The A-A top view in

[0037] Figure 7 Is Figure 5 The B-B top view in

[0038] Figure 8 Is the front view and top view of the slag plugging ring;

[0039] Figure 9 Is the front view and top view of the displacement magnetic ring in the closed state;

[0040] Figure 10 Front view and top view of the displacement magnetic ring in the open state;

[0041] Figure 11 Top view of the spiral blade;

[0042] Figure 12 View of the present invention when installed horizontally.

[0043] Description of reference numerals: 1 is the monitoring tube assembly, 101 is the monitoring tube body, 102 is the end plug, 2 is the installation tube assembly, 201 is the installation tube body, 202 is the magnetic ring holder, 202-1 is the holder release spring piece, 202-2 is the fixing screw, 202-3 is the clamping window, 202-4 is the second screw interface, 3 is the outer sleeve tube assembly, 301 is the outer sleeve tube body, 301-1 is the sliding groove, 301-2 is the spiral blade window, 302 is the slag blocking ring, 302-1 is the first screw interface, 302-2 is the slag blocking hinge, 302-3 is the slag blocking hinge positioning pressure strip, 4 is the displacement magnetic ring assembly, 401 is the displacement magnetic ring body, 402 is the spiral blade, 402-1 is the sliding bead, 402-2 is the spiral tooth cutter, 402-3 is the spiral shaft, 402-4 is the hinge type spring. Detailed implementation manners

[0044] The present invention will be further described below in conjunction with embodiments, but it shall not be used as a basis for limiting the present invention.

[0045] Embodiments of the present invention

[0046] A measurement device for deep double-direction displacement, as shown in the attached Figures 1-12 figure, includes a monitoring tube assembly 1. An outer sleeve tube assembly 3 is provided outside the monitoring tube assembly 1. An installation tube assembly 2 is movably arranged between the monitoring tube assembly 1 and the outer sleeve tube assembly 3. The front end of the installation tube assembly 2 is a displacement magnetic ring assembly 4;

[0047] The monitoring tube assembly 1 includes a monitoring tube body 101, and an end plug 102 is provided at the front end of the monitoring tube body 101;

[0048] The outer sleeve tube assembly 3 includes an outer sleeve tube body 301, a slag blocking ring 302 is provided at the front end of the outer sleeve tube body 301, and a spiral blade window 301-2 is provided on the tube wall at the connection between the outer sleeve tube body 301 and the slag blocking ring 302;

[0049] The installation tube assembly 2 includes an installation tube body 201, and a magnetic ring holder 202 is provided at the front end of the installation tube body 201;

[0050] The displacement magnetic ring assembly 4 includes a displacement magnetic ring body 401, and spiral blades 402 corresponding one by one to the spiral blade windows 301-2 are provided on the circumference of the displacement magnetic ring body 401.

[0051] Preferably, the monitoring pipe body 101, the outer sleeve pipe body 301 and the installation pipe body 201 are all segmented splicing structures.

[0052] Preferably, a chute 301-1 is arranged along the axial direction on the inner wall of the outer sleeve pipe body 301, and the chute 301-1 corresponds to the spring-rotating window 301-2 one by one.

[0053] Preferably, the slag-blocking ring 302 is connected to the outer sleeve pipe body 301 through a first rotary interface 302-1.

[0054] Preferably, a slag-blocking hinge 302-2 is arranged at the front end of the slag-blocking ring 302. The number of sheets of the slag-blocking hinge 302-2 is the same as the number of sheets of the spring-rotating blades 402. A slag-blocking hinge positioning pressure bar 302-3 is arranged inside the slag-blocking ring 302.

[0055] Preferably, the magnetic ring holder 202 is connected to the installation pipe body 201 through a second rotary interface 202-4.

[0056] Preferably, a clamping window 202-3 with the same number as the spring-rotating blades 402 is arranged at the front end of the magnetic ring holder 202. A clamping device release spring piece 202-1 is arranged at the front end of the clamping window 202-3, and the clamping device release spring piece 202-1 is fixed by a fixing screw 202-2.

[0057] Preferably, sliding beads 402-1 are arranged on the outer side of the spring-rotating blades 402.

[0058] Preferably, the spring-rotating blades 402 are connected to the displacement magnetic ring body 401 through a spring-rotating shaft 402-3, and a hinge-type spring 402-4 is arranged at the spring-rotating shaft 402-3.

[0059] Preferably, the spring-rotating blades 402 are spring-rotating toothed cutters 402-2.

[0060] Specific installation method:

[0061] Ⅰ. Drilling in place, cleaning the slag at the bottom, connecting the outer sleeve pipe and the monitoring pipe and then lowering them

[0062] Drilling and hole formation and cleaning the slag at the bottom can be completed by using a conventional geological drill. After reaching the stable rock and soil layer at the bottom, the hole is cleaned by blowing slag or replacing with clean water. Before the hole cleaning is completed, the outer sleeve pipe assembly 3 and the monitoring pipe assembly 1 are spliced according to the buried depth of the lowermost displacement magnetic ring assembly 4 designed, and they are lowered together to the specified depth. When lowering, the end plug 102 of the monitoring pipe is tightened and placed below the reserved hole at the bottom of the slag-blocking ring 302 at the bottom of the outer sleeve pipe assembly 3;

[0063] Ⅱ. Preparing the displacement magnetic ring and connecting it to the installation pipe

[0064] Insert the four spring blades 402 of the displacement magnetic ring assembly 4 into the spring blade clamping window 202-3. Use a screwdriver to fix the ejector spring piece 202-1 of the clamp to the magnetic ring holder 202 (only required for the first magnetic ring, and it is only necessary to confirm that it is in a tightened state later). Connect the magnetic ring holder 202 to the bottom end of the installation pipe body 201 through the second rotary interface 202-4;

[0065] Ⅲ. Displacement Magnetic Ring Pushing and Installation

[0066] Put the displacement magnetic ring assembly 4 in a closed state. Place the four sliding beads 402-1 in the four corresponding sliding grooves 302-1 inside the outer sleeve pipe body 301. Slowly push the displacement magnetic ring assembly 4 to the designated position (i.e., at the spring blade window 301-2 on the outer sleeve pipe body 301) using the installation pipe body 201. Under the action of the four hinge-type springs 402-4 on the displacement magnetic ring assembly 4, the spring blades 402 will initially open and embed into the rock and soil mass. By rotating the installation pipe body 201, due to the unique design of the outer tip of the spring tooth cutter 402-2, the magnetic ring holder 202 will drive the four spring blades 402 to further rotate into the rock and soil mass to reach the final open state;

[0067] Ⅵ. Withdrawal of the Installation Pipe

[0068] After the magnetic ring has been firmly placed in the rock and soil mass, gently reverse-rotate the installation pipe body 201 and then lift it forcefully. The ejector spring piece 202-1 of the clamp will open at the position of the spring blade 402 and then naturally bounce back and close, realizing the safe disconnection of the installation pipe assembly 2 from the already installed displacement magnetic ring assembly 4;

[0069] Ⅴ. Lifting of the Outer Sleeve Pipe

[0070] The outer sleeve pipe assembly 3 should be lifted to the next installation position. During the lifting process, when the slag-blocking ring 302 at the bottom of the outer sleeve pipe reaches the position of the already installed displacement magnetic ring assembly 4, the four slag-blocking hinges 302-2 will open at the position of the spring blade 402 and then naturally bounce back and close, realizing the safe disconnection of the outer sleeve pipe 3 from the already installed displacement magnetic ring assembly 4. When the part of the outer sleeve pipe assembly 3 lifted above the orifice exceeds 1 section, reverse-rotate and remove it, reducing it section by section.

[0071] Repeat steps I-V to complete the installation of the displacement magnetic ring at the next depth. After completing the installation of the magnetic rings for the entire hole, backfill the annular space outside the monitoring pipe with soil or fine mortar for sealing.

[0072] The subsequent monitoring process is the same as the traditional magnetic ring monitoring method and will not be restated.

[0073] Calculation of Monitoring Results:

[0074] The calculation methods for the vertical, horizontal, and oblique monitoring results of the installation direction are the same, and there are two actual situations: (1) The end magnetic ring is located in stable rock and soil mass, which can be used as a reference point for the displacement of all magnetic rings; (2) The end does not reach the stable rock and soil mass, so the displacement calculation reference point for the magnetic ring displacement is the hole mouth point.

[0075] The j-th measurement value of the i-th displacement meter is denoted as s i,j

[0076] For the first situation, the j-th monitoring calculation value of the i-th displacement meter is:

[0077] The displacement change value this time: Δs i,j =(s n,j -s i,j )-(s n,j-1 -s i,j-1 );

[0078] The cumulative displacement change value: ∑Δs i,j =(s n,j -s i,j )-(s n,1 -s i,1 ).

[0079] For the second situation, since the hole mouth displacement is a variable, the hole mouth displacement value should be monitored while monitoring the deep displacement each time. It should be noted here that the monitoring direction is the same as the deep displacement monitoring direction. If they are not the same, conversion should be carried out. Here, the j-th measurement value of the hole mouth is denoted as s 0,j , then the j-th monitoring calculation value of the i-th displacement meter is:

[0080] The displacement change value this time: Δs i,j =(s i,j -s i,j-1 )+(s 0,j -s 0,j-1 );

[0081] The cumulative displacement change value: ∑Δs i,j =(s i,j -s i,1 )+s n,1 .

[0082] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A measuring device for deep bidirectional displacement, characterized in that: it includes a monitoring pipe assembly (1), an outer sleeve pipe assembly (3) is arranged outside the monitoring pipe assembly (1), an installation pipe assembly (2) is movably arranged between the monitoring pipe assembly (1) and the outer sleeve pipe assembly (3), and the front end of the installation pipe assembly (2) is a displacement magnetic ring assembly (4); The monitoring pipe assembly (1) includes a monitoring pipe body (101), and an end plug (102) is arranged at the front end of the monitoring pipe body (101); The outer sleeve pipe assembly (3) includes an outer sleeve pipe body (301), a slag blocking ring (302) is arranged at the front end of the outer sleeve pipe body (301), and a spring spiral window (301-2) is arranged on the pipe wall at the connection of the outer sleeve pipe body (301) and the slag blocking ring (302); The installation pipe assembly (2) includes an installation pipe body (201), and a magnetic ring holder (202) is arranged at the front end of the installation pipe body (201); The displacement magnetic ring assembly (4) includes a displacement magnetic ring body (401), and spring spiral blades (402) corresponding to the spring spiral windows (301-2) one by one are arranged on the circumference of the displacement magnetic ring body (401); The monitoring pipe body (101), the outer sleeve pipe body (301) and the installation pipe body (201) are all sectional splicing structures; A chute (301-1) is arranged along the axial direction on the inner wall of the outer sleeve pipe body (301), and the chute (301-1) corresponds to the spring spiral window (301-2) one by one; A slag blocking hinge (302-2) is arranged at the front end of the slag blocking ring (302), the number of pieces of the slag blocking hinge (302-2) is the same as the number of pieces of the spring spiral blade (402), and a slag blocking hinge positioning pressure strip (302-3) is arranged inside the slag blocking ring (302); A clamping window (202-3) with the same number as the spring spiral blade (402) is arranged at the front end of the magnetic ring holder (202), a clamping device release spring piece (202-1) is arranged at the front end of the clamping window (202-3), and the clamping device release spring piece (202-1) is fixed by a fixing screw (202-2).

2. The measuring device for deep bidirectional displacement according to claim 1, characterized in that: The slag blocking ring (302) is connected to the outer sleeve pipe body (301) through a rotary interface one (302-1).

3. The measuring device for deep bidirectional displacement according to claim 1, characterized in that: The magnetic ring holder (202) is connected to the installation pipe body (201) through a rotary interface two (202-4).

4. The measuring device for deep bidirectional displacement according to claim 1, characterized in that: A sliding bead (402-1) is arranged on the outer side of the spring spiral blade (402).

5. The measuring device for deep bidirectional displacement according to claim 1, characterized in that: The spring spiral blade (402) is connected to the displacement magnetic ring body (401) through a spring spiral shaft (402-3), and a hinge type spring (402-4) is arranged at the spring spiral shaft (402-3).

6. The measuring device for deep bidirectional displacement according to claim 1, characterized in that: The spring spiral blade (402) is a spring spiral tooth cutter (402-2).

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