Dam curtain grouting lifting observation device and installation method thereof

Abstract

The present invention provides a dam curtain grouting lifting observation device and an installation method thereof, comprising an observation hole and a concrete pier arranged beside the observation hole, a protective sleeve inserted in the observation hole, a measuring tube inserted in the protective sleeve, the bottom end of the measuring tube extending to the bottom of the observation hole, the top end exceeding the top end of the protective sleeve, an anchoring piece arranged at the bottom end of the measuring tube, a sealing assembly sleeved on the outside of the measuring tube arranged at the bottom end of the protective sleeve, a filling slurry and an anchoring slurry respectively located at the upper and lower sides of the sealing assembly arranged in the observation hole, and a micrometer arranged on the top of the concrete pier is installed at the top end of the measuring tube through a meter stand. The protective sleeve drives the sealing assembly to be pressed down, and the elastic rubber ring in the sealing assembly is squeezed to make it fit with the inner wall surface of the observation hole to achieve a sealing effect, and when the elastic rubber ring is squeezed, the sealant in the extruded glue structure flows out to form a sealing layer, thereby further improving the sealing effect.

Description

Technical Field

[0001] The invention relates to the field of curtain grouting, and in particular to a dam body curtain grouting lifting observation device and an installation method thereof. Background Art

[0002] Curtain grouting is a grouting project that injects slurry into the cracks and pores of rock or soil to form a continuous water-blocking curtain to reduce seepage and lower penetration pressure. Curtain grouting is a project that uses grouting to build an anti-seepage curtain in the rock or gravel foundation of the dam. The top of the curtain is connected to the concrete sluice floor or dam body, and the bottom is penetrated to a certain depth into the relatively impermeable rock layer to prevent or reduce the penetration of groundwater in the foundation; working together with the drainage system located downstream, it can also reduce the uplift pressure of the seepage water flow on the dam. Since the 20th century, curtain grouting has been the main means of anti-seepage treatment of the foundation of hydraulic structures, and plays an important role in ensuring the safe operation of hydraulic structures.

[0003] When performing foundation reinforcement and anti-seepage grouting, it is usually necessary to inject slurry into the pores or cracks in the stratum. However, with the increase of injection volume and grouting pressure, the problem of grouting lift deformation damage may occur. In order to solve this problem, a common practice is to use clay, kelp, butter, gypsum or a single rubber pad to seal and isolate between the protective casing and the measuring tube of the grouting lift deformation observation device. However, this practice is prone to high-pressure slurry consolidation, thereby affecting the accuracy of the observation device, and may cause the observation device to fail, posing a danger to the safety of the upper building. Therefore, a dam curtain grouting lift observation device and an installation method thereof are proposed to ensure the safety of the grouting process and the accuracy of the observation device. Summary of the invention

[0004] The main purpose of the present invention is to provide a dam curtain grouting lifting observation device and its installation method, so as to solve the problem that high-pressure slurry consolidation occurs between the protective casing and the measuring tube, thereby affecting the accuracy of the observation device and possibly causing the observation device to fail, posing a danger to the safety of the upper building.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a dam body curtain grouting lifting observation device, including an observation hole and a concrete pier arranged beside the observation hole, a protective sleeve is inserted in the observation hole, a measuring tube is inserted in the protective sleeve, the bottom end of the measuring tube extends to the bottom of the observation hole, and the top end exceeds the top end of the protective sleeve, an anchor is arranged at the bottom end of the measuring tube, a sealing assembly sleeved on the outside of the measuring tube is arranged at the bottom end of the protective sleeve, filling slurry and anchoring slurry respectively located on the upper and lower sides of the sealing assembly are arranged in the observation hole, and a micrometer arranged on the top of the concrete pier is installed on the top of the measuring tube through a meter stand.

[0006] In the preferred embodiment, the sealing assembly includes a connecting pipe threadedly connected to the bottom end of the protective sleeve and an elastic rubber ring fixed to the bottom end of the connecting pipe. When the protective sleeve drives the connecting pipe downward, the elastic rubber ring expands due to the squeezing with the anchoring slurry, thereby sealing the upper and lower parts of the elastic rubber ring in the observation hole.

[0007] In a preferred embodiment, a plurality of extrusion structures are arranged in an array on the inner wall surface and the outer wall surface of the elastic rubber ring, and the extrusion structure includes a conical hole arranged on the side of the elastic rubber ring, the large diameter hole of the conical hole is open outward, a PE film is arranged on the inner wall surface of the conical hole, a sealant is arranged in the conical hole, and an aluminum film is arranged at the opening of the conical hole. When the elastic rubber ring is extruded, the sealant therein breaks through the aluminum film and flows out together with the extruded conical hole to form a sealing layer.

[0008] In a preferred embodiment, the aluminum film is provided with an easy-tear fold line;

[0009] A sealing ring is arranged at the connection between the connecting pipe and the protective sleeve, a docking ring is arranged at the bottom end of the connecting pipe, a docking groove matched with the docking ring is arranged at the top end of the elastic rubber ring, and the cross-sections of the docking groove and the docking ring are both T-shaped.

[0010] In a preferred embodiment, the anchoring member is composed of a plurality of recyclable anchoring components arranged at the bottom end of the measuring tube, and the recyclable anchoring components include a recovery groove provided on the outer wall of the measuring tube, an anchoring portion hingedly arranged at the bottom of the recovery groove, and a telescopic support rod hingedly arranged between the anchoring portion and the recovery groove. Both the anchoring portion and the recovery groove are T-shaped. When the anchoring portion is subjected to resistance from below, it will rotate upward to avoid the resistance.

[0011] A plurality of grouting holes located above the recyclable anchoring components are arranged on the outer wall surface of the measuring tube.

[0012] In the preferred embodiment, the telescopic support rod includes an outer rod, two limit grooves arranged on the inner wall surfaces opposite to each other of the outer rod, a telescopic rod movably inserted in the outer rod, two limit blocks symmetrically arranged on the outer wall surface of the telescopic rod and respectively slidably connected to the two limit grooves, a tension spring arranged in the outer rod and in contact with the bottom end of the telescopic rod, and two hinge joints respectively arranged at the ends where the outer rod and the telescopic rod are separated.

[0013] In a preferred embodiment, a supporting component located on the observation hole is provided on the outside of the protective sleeve, and the supporting component includes a connecting ring fixed to the outside of the protective sleeve by bolts, and four annular supporting members equidistantly arranged on the outside of the connecting ring, and the length of the supporting member is greater than the radius of the observation hole.

[0014] In a preferred embodiment, a centering positioning mechanism is provided at the top of the protective sleeve, and the centering positioning mechanism includes a mounting ring embedded in the top of the protective sleeve, and four centering abutment components equidistantly arranged in an annular manner on the top of the mounting ring;

[0015] The centering interference component includes a first U-shaped frame arranged on the top of the mounting ring, sliding grooves are arranged on the opposite side walls of the U-shaped frame, a second U-shaped frame is slidably arranged on the first U-shaped frame, a interference pulley is arranged at the front end of the second U-shaped frame, and sliding rods are arranged on both sides that are slidably connected to the two sliding grooves respectively, a telescopic screw is threadedly penetrated on the first U-shaped frame, a rotating handle is arranged at the end of the telescopic screw, and the front end is connected to the second U-shaped frame through a connecting bearing.

[0016] In the preferred embodiment, the inner diameter of the connecting pipe is smaller than the inner diameter of the protective sleeve and slightly larger than the outer diameter of the measuring pipe, forming a step shape, and an annular guide component is arranged on the step, the annular guide component is horn-shaped, and the annular guide component is formed by a plurality of arc-shaped guide components distributed in an annular manner;

[0017] The arc-shaped guide component includes a support seat arranged on the step, a limiting slide groove opened on the inner wall surface relative to the support seat, a support spring built into the support seat, a support block arranged on the top of the support spring and extending to the outside of the support seat, a limiting slider arranged on the outer wall surface relative to the support block and slidably connected to the limiting slide groove, and an arc-shaped polytetrafluoroethylene plate fixed on the top of the support block, and the top of the support block is inclined from the outside to the inside.

[0018] The method includes:

[0019] S1. Arrange observation holes within the curtain grouting area and fix the holes according to the bottom conditions and design requirements. The depth of the observation holes is 25m below the top boundary of the grouting.

[0020] S2. Install the sealing assembly to the bottom end of the protective sleeve, then hoist the protective sleeve into the observation hole along the center point thereof, and fix it to the opening of the observation hole by means of a supporting component installed on the outside of the protective sleeve;

[0021] S3. Install the centering positioning mechanism to the top of the protective sleeve, adjust the spacing of the four centering interference components, and then hoist the measuring tube into the protective sleeve. When the recyclable anchoring component encounters interference from below, it rotates upward and retracts. During the lowering process, the measuring tube passes through the center hole of the sealing component through the annular guide component in the sealing component. The sealing component and the centering positioning mechanism ensure that the measuring tube is lowered in the center position until the measuring tube is lowered to the bottom of the observation hole, and the recyclable anchoring component loses interference and automatically opens;

[0022] S4, grouting is performed to the bottom of the observation hole through the grouting channel in the middle of the measuring tube, and the anchor grout flows out from the grouting hole to perform anchor grouting on the anchor piece;

[0023] S5. After the anchoring slurry solidifies, the supporting components and the centering positioning mechanism are removed, and the protective sleeve is pressed down, so that the elastic rubber ring is squeezed and expanded, and contacts the inner wall of the observation hole. At the same time, the tapered hole in the elastic rubber ring is squeezed, and the sealant therein breaks through the aluminum film and flows out, forming a sealing layer in the inner and outer gaps of the elastic rubber ring;

[0024] S6. After the sealant solidifies, pour filling slurry into the gap between the protective casing and the observation hole, and form a concrete pier at the hole mouth, and pour concrete piers beside the observation hole at the same time;

[0025] S7. After the filling slurry and concrete pier solidify, install a micrometer in contact with the concrete pier at the top of the measuring tube through the meter stand.

[0026] The present invention provides a dam curtain grouting lifting observation device and an installation method thereof, which have the following beneficial effects:

[0027] 1. By arranging a sealing component at the bottom end of the protective sleeve, it is convenient to drive the sealing component downward through the protective sleeve to squeeze the elastic rubber ring in the sealing component so that it fits with the inner wall surface of the observation hole to achieve a sealing effect;

[0028] 2. By arranging a glue extrusion structure on the elastic rubber ring, when the elastic rubber ring is squeezed, the sealant in the glue extrusion structure flows out to form a sealing layer, thereby further improving the sealing effect;

[0029] 3. By setting the anchoring pieces as multiple recyclable anchoring parts, it is convenient to change the original installation sequence of first installing the measuring tube and then installing the protective sleeve, and the protective sleeve is used in conjunction with the centering positioning mechanism and the sealing assembly to realize the precise positioning and installation of the measuring tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 is a structural diagram of the sealing assembly of the present invention;

[0033] Figure 3 It is a structural diagram of the elastic rubber ring of the present invention;

[0034] Figure 4 is a cross-sectional view of the sealing assembly structure of the present invention;

[0035] Figure 5 The present invention Figure 4 A magnified view of the structure in the middle;

[0036] Figure 6 This is a structural diagram of the connection between the aluminum film and the easy-tear fold line of the present invention;

[0037] Figure 7 It is an expanded view of the connection structure between the measuring tube and the recyclable anchoring component of the present invention;

[0038] Figure 8 It is a recovery diagram of the connection structure between the measuring tube and the recoverable anchoring component of the present invention;

[0039] Fig. 9 is a cross-sectional view of the telescopic support rod structure of the present invention;

[0040] Fig.10 It is a cross-sectional view of the connection structure between the protective sleeve and the centering positioning mechanism of the present invention;

[0041] Fig.11 This is a structural diagram of the connection between the protective sleeve and the supporting component of the present invention;

[0042] Fig.12 This is a top view of the centering positioning mechanism structure of the present invention;

[0043] Fig.13 This is a cross-sectional view of the top structure of the centering and abutting component of the present invention;

[0044] Fig.14 is a top view of the annular guide assembly structure of the present invention;

[0045] Fig.15 The present invention Figure 4 Middle B is an enlarged view of the structure;

[0046] In the figure: observation hole 1; protection sleeve 2; measuring pipe 3; grouting hole 301; sealing assembly 4; connecting pipe 401; sealing ring 402; docking ring 403; arc-shaped guide component 404; support seat 4041; limiting slide groove 4042; support spring 4043; limiting slider 4044; support block 4045; arc-shaped polytetrafluoroethylene plate 4046; elastic rubber ring 405; docking groove 406; extrusion glue structure 407; tapered hole 4071; PE film 4072; aluminum film 4073; sealant 4074; easy-tear fold line 4075; recyclable anchor component 5; recovery groove 501; anchor part 50 2; telescopic support rod 503; outer sleeve rod 5031; limit groove 5032; telescopic rod 5033; limit block 5034; tension spring 5035; hinge joint 5036; anchor slurry 6; concrete pier 7; meter stand 8; micrometer 9; support component 10; connecting ring 101; support member 102; centering positioning mechanism 11; mounting ring 111; centering resistance component 112; first U-shaped frame 1121; sliding groove 1122; second U-shaped frame 1123; resistance pulley 1124; sliding rod 1125; telescopic screw 1126; rotating handle 1127; connecting bearing 1128; filling slurry 12. DETAILED DESCRIPTION

[0047] Example 1

[0048] like Figure 1-6 As shown, the dam body curtain grouting lifting observation device comprises an observation hole 1 and a concrete pier 7 arranged beside the observation hole 1. The observation hole 1 is used to bury a protective casing 2 and a measuring tube 3. The depth of the observation hole 1 is 25m below the top boundary of the grouting into the rock, so as to accurately measure the deformation lifting value and prevent the influence of grouting leakage on the observation device. The observation hole 1 is plugged with a protective casing 2, and the protective casing 2 is plugged with a measuring tube 3. The bottom end of the measuring tube 3 extends to the bottom of the observation hole 1, and the top exceeds the top of the protective casing 2. An anchor is arranged at the bottom end of the measuring tube 3, and a sealing component 4 sleeved on the outside of the measuring tube 3 is arranged at the bottom end of the protective casing 2. Filling slurry 12 and anchoring slurry 6 respectively located on the upper and lower sides of the sealing component 4 are arranged in the observation hole 1. A micrometer 9 arranged on the top of the concrete pier 7 is installed on the top of the measuring tube 3 through a meter stand 8. The value of the micrometer 9 is observed to judge whether the rock mass or the dam body has lifting deformation damage, wherein the allowable value △ is less than 0.2mm.

[0049] In this embodiment, the diameter of the protection sleeve 2 is 32 mm, and the diameter of the measuring tube 3 is 15 mm.

[0050] In the preferred embodiment, the sealing assembly 4 includes a connecting tube 401 threadedly connected to the bottom end of the protective sleeve 2 and an elastic rubber ring 405 fixed to the bottom end of the connecting tube 401. Matching threads are provided on the outer wall surface of the bottom end of the protective sleeve 2 and the inner wall surface of the top of the connecting tube 401. The outer diameter of the connecting tube 401 is larger than the inner diameter of the protective sleeve 2. When the protective sleeve 2 drives the connecting tube 401 to be pressed downward, the elastic rubber ring 405 expands due to the squeezing of the anchoring slurry 6. The elastic rubber ring 405 fits the inner wall surface of the observation hole 1 and the outer wall surface of the measuring tube 3, thereby closing the upper and lower parts of the elastic rubber ring 405 in the observation hole 1, thereby achieving a sealing effect.

[0051] In the preferred embodiment, a plurality of extrusion structures 407 are arranged in an array on the inner wall and the outer wall of the elastic rubber ring 405, and the extrusion structure 407 includes a conical hole 4071 arranged on the side of the elastic rubber ring 405, the large diameter hole of the conical hole 4071 is open outward, a PE film 4072 is arranged on the inner wall of the conical hole 4071, a sealant 4074 is arranged in the conical hole 4071, and an aluminum film 4073 is arranged at the opening of the conical hole 4071. When the elastic rubber ring 405 is squeezed, the sealant 4074 therein breaks through the aluminum film 4073 and flows out together with the extrusion of the conical hole 4071 to form a sealing layer, thereby completing the sealing of the gap between the elastic rubber ring 405 and the inner wall of the observation hole 1 and the outer wall of the measuring tube 3, further improving the sealing effect, and the design of the conical hole 4071 facilitates the sealant 4074 to break through the aluminum film 4073.

[0052] In a preferred embodiment, the aluminum film 4073 is provided with an easy-tear fold line 4075, so that the sealant 4074 can more easily break through the aluminum film 4073;

[0053] A sealing ring 402 is provided at the connection between the connecting tube 401 and the protective sleeve 2. An interference step is provided at the connection between the connecting tube 401 and the protective sleeve 2. The sealing ring 402 is embedded in the interference step. When the bottom end of the protective sleeve 2 conflicts with the interference step, the sealing ring 402 is squeezed to seal the connection.

[0054] A docking ring 403 is fixedly provided at the bottom end of the connecting tube 401, and a docking groove 406 matched with the docking ring 403 is provided at the top end of the elastic rubber ring 405. The cross-sections of the docking groove 406 and the docking ring 403 are both T-shaped. When the connecting tube 401 and the elastic rubber ring 405 are bonded, the docking ring 403 is embedded in the docking groove 406 to ensure the stability of the connection between the connecting tube 401 and the elastic rubber ring 405.

[0055] Example 2

[0056] Further illustrate with reference to Example 1, Figure 1 , 7 -15 shows a structure, in order to ensure the accurate installation of the measuring tube 3, the anchoring piece is composed of a plurality of recyclable anchoring parts 5 arranged at the bottom end of the measuring tube 3, the recyclable anchoring parts 5 include a recovery groove 501 opened on the outer wall surface of the measuring tube 3, an anchoring part 502 hingedly arranged at the bottom of the recovery groove 501 at the bottom end, and a telescopic support rod 503 hingedly arranged between the anchoring part 502 and the recovery groove 501, the two ends of the telescopic support rod 503 are respectively hinged to the anchoring part 502 and the recovery groove 501, the anchoring part 502 and the recovery groove 501 are both T-shaped, and the T-shaped design facilitates the expansion of the anchoring area, when the anchoring part 502 is subjected to resistance from below, it will rotate upward to avoid the resistance, thereby facilitating the installation of the protective sleeve 2 first, and then installing the measuring tube 3 under the protection of the protective sleeve 2, which has the effect of preliminary positioning.

[0057] In addition, a plurality of grouting holes 301 located above the recoverable anchoring component 5 are arranged on the outer wall surface of the measuring tube 3. The measuring tube 3 is a hollow tube body with an open upper end and a closed bottom end, so as to prevent the recoverable anchoring component 5 from being squeezed and recovered by the slurry below during grouting.

[0058] In the preferred embodiment, the telescopic support rod 503 includes an outer rod 5031 with an open top and a hollow interior, two limit grooves 5032 arranged on the inner wall surfaces opposite to each other of the outer rod 5031, a telescopic rod 5033 movably inserted in the outer rod 5031, two limit blocks 5034 symmetrically fixed on the outer wall surface of the telescopic rod 5033 and respectively slidably connected to the two limit grooves 5032, a tension spring 5035 arranged in the outer rod 5031 and in contact with the bottom end of the telescopic rod 5033, and two hinge joints 5036 respectively fixed at the ends of the outer rod 5031 and the telescopic rod 5033 that are separated from each other. Under the action of the tension of the tension spring 5035, when the contact force disappears, the telescopic rod 5033 can quickly open and reset the recyclable anchor component 5.

[0059] In the preferred embodiment, the outside of the protective sleeve 2 is provided with a support component 10 located on the observation hole 1, and the support component 10 includes a connecting ring 101 fixed to the outside of the protective sleeve 2 by bolts, and four annular support members 102 welded equidistantly on the outside of the connecting ring 101. The length of the support member 102 is greater than the radius of the observation hole 1. The connection between the connecting ring 101 and the protective sleeve 2 is provided with holes for the bolts to pass through. The protective sleeve 2 can be hoisted in the observation hole 1 through the support component 10, thereby facilitating the insertion of the measuring tube 3.

[0060] In the preferred embodiment, a centering positioning mechanism 11 is provided at the top of the protective sleeve 2, and the centering positioning mechanism 11 includes a mounting ring 111 embedded in the top of the protective sleeve 2, and four annular centering abutment components 112 fixedly arranged at the top of the mounting ring 111 at equal intervals. The cross section of the mounting ring 111 is concave, and its groove is adapted to the wall thickness of the top of the protective sleeve 2. The four centering abutment components 112 can ensure that the measuring tube 3 is inserted into the observation hole 1 along the center point, so as to avoid the measurement tube 3 from being skewed during installation, which affects the observation results.

[0061] The centering resistance component 112 includes a first U-shaped frame 1121 fixed on the top of the mounting ring 111, and sliding grooves 1122 are arranged on the opposite side walls of the U-shaped frame 1121. A second U-shaped frame 1123 is slidably arranged in the first U-shaped frame 1121, and a resistance pulley 1124 is arranged at the front end of the second U-shaped frame 1123 through shaft rotation, and sliding rods 1125 are fixed on both sides and are respectively slidably connected to the two sliding grooves 1122, a telescopic screw 1126 is threadedly penetrated on the first U-shaped frame 1121, and a rotating handle 1127 is arranged at the end of the telescopic screw 1126, and the front end is connected to the second U-shaped frame 1123 through a connecting bearing 1128, and the connecting bearing 1128 is fixed on the second U-shaped frame 1123.

[0062] When in use, the extension and retraction of the interference pulley 1124 can be adjusted by controlling the rotation of the rotating handle 1127, thereby adjusting the distance between the four interference pulleys 1124. Through the contact between the interference pulley 1124 and the outer wall of the measuring tube 3, the effect of centered positioning and insertion can be achieved.

[0063] In the preferred embodiment, the inner diameter of the connecting tube 401 is smaller than the inner diameter of the protective sleeve 2 and slightly larger than the outer diameter of the measuring tube 3, forming a step shape. An annular guide component is provided on the step. The annular guide component is horn-shaped and is formed by a plurality of arc-shaped guide components 404 distributed in an annular manner. The small inner diameter connecting tube 401 is inserted through the bottom end of the measuring tube 3, and the centering positioning mechanism 11 can be used to achieve centering positioning on both sides, further improving the centering positioning effect. The annular guide component can play a guiding role, so that the bottom end of the measuring tube 3 is inserted into the connecting tube 401;

[0064] The arc-shaped guide component 404 includes a support seat 4041 fixed on the step, a limiting slide groove 4042 opened on the inner wall surface relative to the support seat 4041, a support spring 4043 built into the support seat 4041, a support block 4045 arranged on the top of the support spring 4043 and extending to the outside of the support seat 4041, a limiting slider 4044 arranged on the outer wall surface relative to the support block 4045 and slidably connected to the limiting slide groove 4042, and an arc-shaped polytetrafluoroethylene plate 4046 fixed on the top of the support block 4045. The arc-shaped polytetrafluoroethylene plate 4046 is fixed to the top of the support block 4045 by screws. The top of the support seat 4041 is open, and the interior is a hollow cavity. The top of the support block 4045 is inclined from the outside to the inside.

[0065] When in use, the independent arc-shaped guide component 404 can not only play a guiding role, but also can alleviate the impact force when the measuring tube 3 falls through the support spring 4043.

[0066] Example 3

[0067] Further illustrate with reference to Examples 1 and 2, Figure 1-15 The structure shown is a dam curtain grouting lifting observation device, and the method includes:

[0068] S1. Arrange observation hole 1 within the curtain grouting area and fix the hole according to the bottom conditions and design requirements. The depth of observation hole 1 is 25m below the top boundary of grouting.

[0069] S2, installing the sealing assembly 4 to the bottom end of the protective sleeve 2, then hoisting the protective sleeve 2 into the observation hole 1 along the center point thereof, and fixing it to the opening of the observation hole 1 through the supporting member 10 installed on the outside of the protective sleeve 2;

[0070] S3, install the centering positioning mechanism 11 to the top of the protective sleeve 2, and adjust the spacing of the four centering interference components 112, then hoist the measuring tube 3 into the protective sleeve 2, and when the recyclable anchoring component 5 is interfered by the bottom, it is rotated upward and retracted. During the lowering process, the measuring tube 3 is passed through the center hole of the sealing component 4 through the annular guide component in the sealing component 4. The sealing component 4 and the centering positioning mechanism 11 can ensure that the measuring tube 3 is lowered in the center position until the measuring tube 3 is lowered to the bottom of the observation hole 1, and the recyclable anchoring component 5 loses the interference and automatically opens;

[0071] S4, grouting is performed to the bottom of the observation hole 1 through the grouting channel in the middle of the measuring tube 3, and the anchoring slurry 6 flows out from the grouting hole 301 to perform anchor grouting on the anchor piece;

[0072] S5. After the anchoring slurry 6 solidifies, the supporting component 10 and the centering positioning mechanism 11 are removed, and the protective sleeve 2 is pressed down, so that the elastic rubber ring 405 is squeezed and expanded, and contacts the inner wall of the observation hole 1. At the same time, the tapered hole 4071 in the elastic rubber ring 405 is squeezed, and the sealant 4074 therein breaks through the aluminum film 4073 and flows out, forming a sealing layer in the inner and outer gaps of the elastic rubber ring 405;

[0073] S6, after the sealant 4074 solidifies, pour the filling slurry 12 into the gap between the protective sleeve 2 and the observation hole 1, and form a concrete pier at the hole mouth, and pour the concrete pier 7 beside the observation hole 1 at the same time;

[0074] S7, after the filling slurry 12 and the concrete pier 7 are solidified, a micrometer 9 in contact with the concrete pier 7 is installed at the top of the measuring tube 3 through the meter stand 8.

[0075] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A dam curtain grouting lifting observation device, comprising an observation hole (1) and a concrete pier (7) arranged beside the observation hole (1), wherein: A protective sleeve (2) is inserted into the hole (1), a measuring tube (3) is inserted into the protective sleeve (2), the bottom end of the measuring tube (3) extends to the bottom of the observation hole (1), and the top end exceeds the top end of the protective sleeve (2), an anchor is provided at the bottom end of the measuring tube (3), a sealing component (4) sleeved on the outside of the measuring tube (3) is provided at the bottom end of the protective sleeve (2), a filling slurry (12) and an anchoring slurry (6) are provided in the observation hole (1) and are respectively located on the upper and lower sides of the sealing component (4), and a micrometer (9) provided on the top of the concrete pier (7) is installed at the top of the measuring tube (3) through a meter stand (8); The anchoring member is composed of a plurality of recyclable anchoring components (5) arranged at the bottom end of the measuring tube (3); a plurality of grouting holes (301) located above the recyclable anchoring components (5) are arranged on the outer wall surface of the measuring tube (3); The sealing assembly (4) comprises a connecting pipe (401) threadedly connected to the bottom end of the protective sleeve (2) and an elastic rubber ring (405) fixedly arranged at the bottom end of the connecting pipe (401); The inner diameter of the connecting tube (401) is smaller than the inner diameter of the protective sleeve (2) and slightly larger than the outer diameter of the measuring tube (3), forming a step shape, on which an annular guide component is arranged, the annular guide component is horn-shaped, and is formed by a plurality of arc-shaped guide components (404) distributed in an annular manner; A centering positioning mechanism (11) is provided at the top end of the protective sleeve (2); The protective sleeve (2) is first installed in the observation hole (1), and the measuring tube (3) passes through the protective sleeve (2) after passing through the centering positioning mechanism (11) and the arc-shaped guide component (404).

2. The dam curtain grouting lifting observation device according to claim 1 is characterized in that: When the protective sleeve (2) drives the connecting pipe (401) to be pressed downward, the elastic rubber ring (405) expands due to being squeezed by the anchoring slurry (6), thereby sealing the upper and lower parts of the elastic rubber ring (405) in the observation hole (1).

3. The dam curtain grouting lifting observation device according to claim 2 is characterized in that: A plurality of glue extrusion structures (407) are arranged in an array on the inner wall surface and the outer wall surface of the elastic rubber ring (405), and the glue extrusion structure (407) comprises a tapered hole (4071) arranged on the side of the elastic rubber ring (405), the large diameter hole of the tapered hole (4071) is open outward, a PE film (4072) is arranged on the inner wall surface of the tapered hole (4071), a sealing glue (4074) is arranged in the tapered hole (4071), and an aluminum film (4073) is arranged at the opening of the tapered hole (4071). When the elastic rubber ring (405) is squeezed, the sealing glue (4074) therein breaks through the aluminum film (4073) and flows out together with the extruded tapered hole (4071), thereby forming a sealing layer.

4. The dam curtain grouting lifting observation device according to claim 3 is characterized by: The aluminum film (4073) is provided with an easy-tear folding line (4075); A sealing ring (402) is provided at the connection between the connecting tube (401) and the protective sleeve (2); a docking ring (403) is provided at the bottom end of the connecting tube (401); a docking groove (406) adapted to the docking ring (403) is provided at the top end of the elastic rubber ring (405); and the cross-sections of the docking groove (406) and the docking ring (403) are both T-shaped.

5. The dam curtain grouting lifting observation device according to claim 3 or 4 is characterized in that: The recyclable anchoring component (5) comprises a recovery groove (501) provided on the outer wall surface of the measuring tube (3), an anchoring portion (502) whose bottom end is hingedly arranged on the bottom of the recovery groove (501), and a telescopic support rod (503) hingedly arranged between the anchoring portion (502) and the recovery groove (501). The anchoring portion (502) and the recovery groove (501) are both T-shaped. When the anchoring portion (502) is subjected to resistance from below, it will rotate upward to avoid the resistance.

6. The dam curtain grouting lifting observation device according to claim 5 is characterized in that: The telescopic support rod (503) comprises an outer outer rod (5031), two limiting grooves (5032) arranged on the inner wall surface opposite to the outer outer rod (5031), a telescopic rod (5033) movably inserted in the outer outer rod (5031), two limiting blocks (5034) symmetrically arranged on the outer wall surface of the telescopic rod (5033) and respectively slidably connected to the two limiting grooves (5032), a tension spring (5035) arranged in the outer outer rod (5031) and in contact with the bottom end of the telescopic rod (5033), and two hinge joints (5036) respectively arranged at the ends of the outer outer rod (5031) and the telescopic rod (5033) separated from each other.

7. The dam curtain grouting lifting observation device according to claim 6 is characterized by: The protective sleeve (2) is provided with a support component (10) located on the observation hole (1) on the outside, the support component (10) comprising a connecting ring (101) fixed to the outside of the protective sleeve (2) by bolts, and four annular support members (102) equidistantly arranged on the outside of the connecting ring (101), the length of the support member (102) being greater than the radius of the observation hole (1).

8. The dam curtain grouting lifting observation device according to claim 7 is characterized in that: The centering positioning mechanism (11) comprises a mounting ring (111) embedded in the top of the protective sleeve (2), and four centering abutment components (112) arranged in annular shapes and equidistantly on the top of the mounting ring (111); The centering abutment component (112) comprises a first U-shaped frame (1121) arranged on the top of the mounting ring (111); sliding grooves (1122) are arranged on opposite side walls of the U-shaped frame (1121); a second U-shaped frame (1123) is slidably arranged in the first U-shaped frame (1121); a abutment pulley (1124) is arranged at the front end of the second U-shaped frame (1123); sliding rods (1125) are arranged on both sides and are respectively slidably connected to the two sliding grooves (1122); a telescopic screw rod (1126) is threadedly penetrated on the first U-shaped frame (1121); a rotating handle (1127) is arranged at the end of the telescopic screw rod (1126); and the front end is connected to the second U-shaped frame (1123) via a connecting bearing (1128).

9. The dam curtain grouting lifting observation device according to claim 8 is characterized by: The arc-shaped guide component (404) comprises a support seat (4041) arranged on the step, a limiting slide groove (4042) provided on the inner wall surface opposite to the support seat (4041), a support spring (4043) built into the support seat (4041), a support block (4045) arranged on the top end of the support spring (4043) and extending to the outside of the support seat (4041), a limiting slider (4044) arranged on the outer wall surface opposite to the support block (4045) and slidably connected to the limiting slide groove (4042), and an arc-shaped polytetrafluoroethylene plate (4046) fixedly arranged on the top end of the support block (4045), and the top end of the support block (4045) is inclined from the outside to the inside.

10. The installation method of the dam curtain grouting lifting observation device according to claim 8 is characterized by: The method includes: S1. Arrange observation holes (1) within the curtain grouting area and fix the holes according to the bottom conditions and design requirements. The depth of the observation holes (1) is 25 m below the top boundary of the grouting. S2, installing the sealing assembly (4) to the bottom end of the protective sleeve (2), then hoisting the protective sleeve (2) into the observation hole (1) along the center point thereof, and fixing it to the opening of the observation hole (1) by means of a supporting component (10) installed on the outside of the protective sleeve (2); S3, installing the centering positioning mechanism (11) to the top of the protective sleeve (2), and adjusting the spacing between the four centering abutment components (112), then hoisting the measuring tube (3) into the protective sleeve (2), and when the retrievable anchor component (5) is abutted from below, it is rotated upward and retracted. During the lowering process, the measuring tube (3) is passed through the center hole of the sealing component (4) through the annular guide component in the sealing component (4), and the sealing component (4) and the centering positioning mechanism (11) can ensure that the measuring tube (3) is lowered in the center position until the measuring tube (3) is lowered to the bottom of the observation hole (1), and the retrievable anchor component (5) loses abutment and automatically opens; S4, grouting is performed toward the bottom of the observation hole (1) through the grouting channel in the middle of the measuring tube (3), and the anchoring slurry (6) flows out from the grouting hole (301), and the anchoring grouting is performed on the anchoring piece; S5. After the anchoring slurry (6) solidifies, the supporting component (10) and the centering positioning mechanism (11) are removed, and the protective sleeve (2) is pressed downward, so that the elastic rubber ring (405) is squeezed and expanded, and contacts the inner wall of the observation hole (1). At the same time, the tapered hole (4071) in the elastic rubber ring (405) is squeezed, and the sealant (4074) therein breaks through the aluminum film (4073) and flows out, forming a sealing layer in the inner and outer gaps of the elastic rubber ring (405); S6, after the sealant (4074) solidifies, pour the filling slurry (12) into the gap between the protective sleeve (2) and the observation hole (1), and form a concrete pier at the hole mouth, and pour the concrete pier (7) beside the observation hole (1) at the same time; S7. After the filling slurry (12) and the concrete pier (7) are solidified, a micrometer (9) in contact with the concrete pier (7) is installed at the top of the measuring tube (3) through a meter stand (8).

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