Boot sleeve type anchor rod and anchor cable sleeve bottom sealing and grouting system below underground water level line

Abstract

The utility model relates to a shoe sleeve type anchor rod and anchor cable casing pipe bottom sealing grouting system below an underground water level line, which comprises a drilling machine, a grouting machine, a pressure maintaining grouting device, an outer casing pipe and a shoe sleeve, and is characterized in that the drilling machine and the outer casing pipe are used for drilling holes at hole positions on an enclosure structure to form anchor holes; the pressure-maintaining grouting device and the grouting machine are used for conducting grouting on the bottom of the anchor hole to form a bottom reinforcing area, one end of the pressure-maintaining grouting device is connected with the outer sleeve, one end of the inner drill rod is connected with a power head of the drilling machine, the other end of the inner drill rod penetrates through the pressure-maintaining grouting device, and the other end of the inner drill rod is connected with the outer sleeve. The grouting machine is used for grouting the bottom area, located in the anchor hole, of the outer sleeve through the inner drill rod so as to form a grouting consolidation body; the shoe sleeve is installed in the grouting consolidation body and used for pulling an anchor rod and / or an anchor cable.

Description

Technical Field

[0001] The utility model relates to the fields of foundation pits, deep foundation pits and other underground projects, and in particular to an anchor rod and anchor cable construction system in foundation pits, deep foundation pits and other underground projects, and more specifically to a boot-type anchor rod and anchor cable casing bottom sealing grouting system below the groundwater level line. Background Art

[0002] With the development of the economy and the expansion of urban construction, high-rise buildings, large buildings and various underground facilities are increasing, and the scale of foundation pits and other underground projects is also getting larger and larger. In the construction process of underground projects, the support form of "enclosing structure + anchor rod (anchor cable)" is often used.

[0003] In the past, support work required for underground facilities was relatively shallow, perhaps only about 10 meters, while the groundwater level was around 30 meters. Therefore, traditional retaining structures combined with anchor rods or cables could easily achieve support. However, with increasing awareness of environmental protection and the maturation of groundwater protection measures, the groundwater level is rising year by year.

[0004] However, as the groundwater level rises, the depth of underground engineering construction is required to be deeper and deeper, sometimes even reaching a depth of 20 to 30 meters underground, which intersects with the groundwater level. At this time, when the traditional "enclosure structure + anchor rod (anchor cable)" support form is adopted, if the groundwater level is high during the construction of anchor rods or anchor cables, a large amount of groundwater will gush out during the drilling process, which is accompanied by a large amount of medium loss in the stratum, causing the enclosure structure to sink and deform significantly, thereby affecting the safety of surrounding structures and posing a serious safety hazard.

[0005] In addition, during the construction process of water-rich sand layers, when drilling is carried out using casing follow-up construction, due to the poor cohesion of the sand layer, under the action of water pressure, after drilling to the designed depth, water and sand will gush out from the end of the casing, causing the casing to be blocked by sand and the anchor rods or anchor cables to be unable to be installed smoothly.

[0006] Therefore, providing a boot-type anchor bolt and anchor cable casing bottom sealing grouting system suitable for below the groundwater level line and capable of smoothly completing the installation of anchor bolts and anchor cables has become an issue that urgently needs to be solved in the industry. Utility Model Content

[0007] In response to the above problems, one of the purposes of the present invention is to provide a boot-type anchor rod and cable casing bottom sealing grouting system below the groundwater level line, which controls the sand gushing from the hole mouth through the hole mouth anti-burst device, uses the pressure-maintaining grouting device to carry out hole bottom grouting to reinforce the stratum, and installs the boot sleeve, thereby achieving the smooth construction of anchor rods and cables below the groundwater level line, and providing a new option for the construction of anchor rods and cables below the water level line in the industry.

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] The utility model provides a boot-type anchor bolt and anchor cable casing bottom sealing grouting system below the groundwater level, comprising: a drilling rig, a grouting machine, a pressure-maintaining grouting device, an outer sleeve and a boot, wherein:

[0010] The drilling rig and the outer casing are used to drill holes at the hole positions on the enclosure structure to form anchor holes;

[0011] The pressure-maintaining grouting device and the grouting machine are used to grout the bottom of the anchor hole to form a bottom reinforcement area, one end of the pressure-maintaining grouting device is connected to the outer casing, one end of the inner drill rod is connected to the power head of the drilling rig, and the other end of the inner drill rod passes through the pressure-maintaining grouting device. The grouting machine grouts the bottom area of the outer casing located in the anchor hole through the inner drill rod to form a grouting consolidation body;

[0012] The boot is installed in the grouting consolidation body and is used to pull the anchor rod and / or anchor cable.

[0013] In some embodiments, the outer diameter of the outer casing is set to 60 mm to 200 mm, and the outer diameter of the inner drill rod is set to 50 mm to 114 mm.

[0014] In some embodiments, the boot cover includes a boot cover columnar body and a cone connected to the bottom of the columnar body. The outer diameter of the boot cover is set to 60 mm to 200 mm, and the length is set to 50 cm to 200 cm.

[0015] In some embodiments, a barbed steel bar or steel pipe with a length of 50 to 100 cm is provided at the bottom of the cone of the boot cover. The diameter of the steel bar is set to 18 to 25 mm, and the diameter of the steel pipe is set to 20 to 50 mm.

[0016] In some embodiments, the pressure-maintaining grouting device includes: a hollow cavity, a casing port provided at one end of the hollow cavity, a first grouting end plate provided at the other end of the hollow cavity, a second grouting end plate bolted to the first grouting end plate, and a sealing chamber body clamped between the first grouting end plate and the second grouting end plate, wherein the inner wall of the casing port is provided with an internal thread for threaded connection with the outer casing, the first grouting end plate, the second grouting end plate and the sealing chamber body are provided with coaxial through holes, a sealing member is provided in the sealing chamber body, and the inner diameter of the sealing member matches the outer diameter of the inner drill rod.

[0017] In some embodiments, the outer diameter of the inner drill rod is 1 to 2 cm smaller than the diameter of the through hole of the sealed chamber.

[0018] In some embodiments, the diameter of the through hole of the first grouting end plate is 1 to 2 cm larger than the outer diameter of the inner drill rod.

[0019] In some embodiments, the seal is a V-type composite seal.

[0020] In some embodiments, the hollow cavity is integrally connected to the first end plate.

[0021] In some embodiments, an orifice anti-blowout device installed at the orifice of the enclosure structure is also included, and the orifice anti-blowout device includes: a fixing plate group, a sealing plate and a positioning plate group, wherein the fixing plate group includes a first end plate fixed to the enclosure structure, a first connecting plate connected to the top end of the first end plate and extending outward, a second connecting plate connected to the bottom end of the first end plate and extending outward, and a second end plate connected between the first connecting plate and the second connecting plate, the length of the first connecting plate is less than the length of the second connecting plate, the sealing plate is arranged on the outer surface of the second end plate, the positioning plate group is pressed at the outer edge of the sealing plate and fixed to the second end plate, a first through hole is opened in the center of the first end plate, a second through hole is opened in the center of the second end plate, and a central through hole is opened in the center of the sealing plate, so that the outer sleeve passes through the central through hole, the second through hole and the first through hole in sequence to enter the underground, and the angle between the first end plate and the second end plate is set to 15 to 25 degrees.

[0022] In some embodiments, a sealing gasket is sandwiched between the first end plate and the enclosure structure.

[0023] In some embodiments, the positioning plate assembly includes a plurality of pressure plate pieces, each of which is disposed around the outer edge of the sealing plate.

[0024] In some embodiments, the first end plate is connected to the enclosure structure by expansion bolts.

[0025] In some embodiments, the diameter of the central through hole is smaller than the diameter of the outer sleeve, and the diameters of the first through hole and the second through hole are larger than the diameter of the outer sleeve.

[0026] In some embodiments, the first end plate and the second end plate are both steel plates.

[0027] In some embodiments, the first end plate and the second end plate are provided with bolt holes.

[0028] In some embodiments, the sealing plate is a rubber plate.

[0029] In some embodiments, the sealing gasket plate is a rubber plate or a polyurethane plate.

[0030] By adopting the above technical solutions, the present invention has at least achieved the following technical effects: (1) It is suitable for the bottom grouting construction of anchor rods and anchor cables in the ground below the groundwater level line, which is prone to sudden surges. When drilling, the hole mouth anti-surge device is used to limit the water and sand gushing out of the casing; (2) Grouting is carried out by the pressure-maintaining grouting device to prevent the slurry from returning to the hole mouth, thereby ensuring the grouting effect; (3) After the ground in the bottom area of the hole is reinforced by grouting, the sand gushing is limited by the boot sleeve, thereby enhancing the grouting effect, thereby preventing the anchor rods and anchor cables from being installed in place, and providing conditions for the smooth installation of subsequent anchor rods and anchor cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figures 1 to 6 A schematic diagram showing the construction process of the boot-type anchor bolt, anchor cable, casing bottom sealing grouting system below the groundwater level of the present invention is shown;

[0032] Figure 7 Shows a schematic structural diagram of the boot cover of the present invention;

[0033] Figure 8 A side sectional view of the orifice anti-burst device of the present invention is shown;

[0034] Figure 9 Shows a front view of the orifice anti-burst device of the present utility model;

[0035] Figure 10 Shows a schematic structural diagram of the pressure-maintaining grouting device of the present invention;

[0036] Figure 11 A schematic diagram of the use state of the pressure-maintaining grouting device of the present invention is shown;

[0037] Description of reference numerals:

[0038] 0-embedded hole, 1-enclosure structure, 2-drilling rig, 3-power head, 4-outer casing, 5-inner drill rod, 6-grouting consolidation body, 7-mixing barrel, 8-grouting machine, 9-grouting pipe, 10-shoe sleeve, 101-shoe sleeve columnar body, 102-cone, 103-rebar, 12-high-speed pulping machine, K-hole mouth anti-burst device, K1-fixed plate group, K2-sealing plate, K3-positioning plate group, K1-fixed plate group, K11-first end plate, K110-first through hole , K12-second end plate, K120-second through hole, KL1-first connecting plate, KL2-second connecting plate, K2-sealing plate, K20-center through hole, K3-positioning plate group, K30-pressure plate, K4-sealing pad, J-pressure maintaining grouting device, J1-hollow cavity, J2-casing port, J21-internal thread, J3-first end plate, J4-second end plate, J5-sealing chamber, J6-seal, Q-bolt, P-expansion bolt, S-underground. DETAILED DESCRIPTION

[0039] To make the purpose, technical solution, and advantages of the present invention more clearly apparent, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0040] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the systems or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the use of terms such as "first" and "second" to define components is solely for the purpose of distinguishing between such components. Unless otherwise stated, these terms have no special meanings and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0042] Next, the construction process of the boot-type anchor rod and anchor cable casing bottom sealing grouting system below the groundwater level line of the present invention will be described in detail with reference to the accompanying drawings.

[0043] As a non-limiting embodiment, the construction process of the boot-type anchor bolt anchor cable casing bottom grouting system provided by the present invention is as follows: Figures 1 to 6 As shown, first, cement slurry is stirred in the mixing barrel 7, and water glass and bentonite slurry are prepared in advance.

[0044] Afterwards, if Figure 1 As shown, the periphery of the embedded hole 0 of the anchor rod body or anchor cable body on the surface of the enclosure structure 1 is first roughened, and then the hole mouth anti-burst device K is installed, wherein the hole mouth anti-burst device K is firmly connected to the enclosure structure 1 using expansion bolts P.

[0045] Then, if Figure 2 As shown, the drilling rig 2 uses an outer casing 4 and an inner drill rod 5 to synchronously drill a hole to the designed depth to form an anchor hole, connects the grouting machine 8 and the drilling rig power head 3 through the grouting pipe 9, and then uses the grouting machine 8 to inject the bentonite slurry stirred in the high-speed pulping machine 12 into the outer casing 4.

[0046] Then, if Figure 3 As shown, after the outer sleeve 4 is filled with bentonite slurry, the power head 3 of the drilling rig 2 is separated from the outer sleeve 4 and the inner drill rod 5, and then the pressure-maintaining grouting device J is installed at the tail end of the outer sleeve 4, the inner drill rod 5 is inserted into the pressure-maintaining grouting device J, and connected to the power head 3.

[0047] Then, if Figure 4 As shown, a drilling rig 2 is used to deepen the inner drill rod 5 by 1 to 5 meters, and then cement slurry is stirred in a mixing barrel 7. Then, a grouting machine 8 is used to inject cement slurry and water glass into the formation through a grouting pipe 9 connected to the power head 3 and the inner drill rod 5 to form a grouting consolidation body 6.

[0048] Finally, if Figure 5 and Figure 6 As shown, the pressure-maintaining grouting device J and the inner drill rod 5 are removed by using the drilling rig 2, the power head 3 of the drilling rig 2 is connected to the inner drill rod 5, and the pre-made boot sleeve 10 is pushed into the outer sleeve 4 until the conical part of the boot sleeve 10 is inserted into the grouting consolidation body 6.

[0049] like Figure 7 As shown, the boot cover 10 of the present invention includes a boot cover columnar body 101 and a cone 102 connected to the bottom of the columnar body 101 , and a barbed steel bar 103 with a length of 80 cm is provided at the bottom of the cone 102 .

[0050] As another non-limiting embodiment, Figure 8As shown, the orifice anti-burst device K includes: a fixing plate group K1, a sealing plate K2 and a positioning plate group K3.

[0051] Specifically, the fixing plate group K1 includes: a first end plate K11, a second end plate K12, a first connecting plate KL1, and a second connecting plate KL2. The first end plate K11 is firmly connected to the enclosure structure 1 by expansion bolts P. The first connecting plate KL1 is welded to the top of the first end plate K11 and extends outward. The second connecting plate KL2 is welded to the bottom of the first end plate K11 and extends outward. The second end plate K12 is welded between the first connecting plate KL1 and the second connecting plate KL2. Figure 11 As shown, the length of the first connecting plate KL1 is shorter than that of the second connecting plate KL2, thereby forming a certain angle between the first end plate K11 and the second end plate K12, thereby achieving the effect of oblique insertion into the outer casing and oblique tensioning of the anchor rod and cable. In this non-limiting embodiment, the first connecting plate KL1 and the second connecting plate KL2 can be steel pipes or steel plates.

[0052] like Figure 8 and Figure 9 As shown, a sealing plate K2 made of a rubber plate is arranged on the outer surface of the second end plate K12, a positioning plate group K3 is pressed on the outer edge of the sealing plate K2, and is fixed to the second end plate K12 by a bolt Q, a first through hole K110 is opened in the center of the first end plate K11, a second through hole K120 is opened in the center of the second end plate K12, and a central through hole K20 is opened in the center of the sealing plate K2, so that the outer sleeve 4 can pass through the central through hole K20, the second through hole 110 and the first through hole 120 in sequence to enter the underground S.

[0053] In this non-limiting embodiment, in order to prevent water and sand from gushing between the first end plate K11 and the enclosure structure 1 , a sealing pad K4 made of a rubber plate or a polyurethane plate is sandwiched between the first end plate K11 and the enclosure structure 1 .

[0054] In order to prevent underground mud and sand from gushing out from the outer wall of the outer casing, the diameter of the central through hole K20 of the utility model is smaller than the diameter of the outer casing 4, thereby utilizing the elasticity of the sealing plate itself so that the central through hole K20 can tightly clamp the outer wall of the outer casing 4.

[0055] As another non-limiting embodiment, Figure 9 The positioning plate group K3 includes several pressure plates K30, each of which is arranged around the outer edge of the sealing plate K3 and then fixed to the second end plate K12 by bolts, thereby achieving the fixing effect of the sealing plate K3.

[0056] Therefore, when using the hole mouth anti-bumping device K, first, the first end plate K11 is firmly connected to the enclosure structure 1 by the expansion bolt P, and the first end plate K11 and the enclosure structure 1 are sealed with a sealing gasket K4 made of a rubber plate or a polyurethane plate. The second end plate K12 is inclined at an angle of 20 degrees to the first end plate through the first connecting plate KL1 and the second connecting plate KL2, and the central through hole K20 of the sealing plate K2 is aligned with the second through hole K120 of the second end plate K12, and then the outer sleeve 4 is passed through the central through hole K20, the second through hole K120 and the first through hole K110 in sequence to the underground S, and then each pressure plate K30 is pressed on the sealing plate K2 and fixed to the second end plate K12 by bolts Q, thereby completing the entire installation process.

[0057] In this non-limiting embodiment, the pressure-maintaining grouting device J is as follows: Figure 10 As shown, the invention comprises a hollow cavity J1, a first end plate J3, a second end plate J4, and a sealing chamber J5. Specifically, a casing port J2 is provided at one end of the hollow cavity J1, and a first end plate J3 is integrally connected to the other end of the hollow cavity J1. The second end plate J4 is connected to the first end plate J3 via bolts Q. The sealing chamber J5 is sandwiched between the first and second end plates J3 and J4. The first and second end plates J3 and J4 are provided with coaxial through-holes, and a sealing member J6 is provided within the sealing chamber J5. The diameter of the casing port J2 matches that of the outer sleeve 4. The inner wall of the casing port J2 is provided with an internal thread J21, thereby enabling threaded connection with the outer sleeve 4. The inner diameter of the sealing member J6 matches the outer diameter of the inner drill rod 5, thereby achieving a sealing effect on the inner drill rod 5 using the sealing member J6.

[0058] During use, before grouting the bottom, if Figure 11 As shown, the pressure-maintaining grouting device J is connected to the outer casing 4 through the casing port J2. Since the interior of the pressure-maintaining grouting device J is a hollow structure, the inner drill rod 5 passes through the second end plate J4, the sealing chamber J5, the first end plate J3 in sequence, and passes through the interior of the hollow cavity J1. A V-shaped combined seal J6 is installed in the sealing chamber J5. The tightness of the V-shaped combined seal J6 is controlled by the bolts Q on the second end plate J4 and the first end plate J3 to seal the inner drill rod 5 tightly. Then, grouting is carried out to achieve the effect of maintaining pressure in the outer casing and preventing the slurry from flowing back into the outer casing.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A boot-type anchor bolt and cable casing bottom sealing grouting system below the groundwater level, characterized in that: include: Drilling rig, grouting machine, pressure-maintaining grouting device, outer casing and boot cover, among which, The drilling rig and the outer casing are used to drill holes at the hole positions on the enclosure structure to form anchor holes, wherein the drilling rig uses the outer casing and the inner drill rod to synchronously drill the holes to the designed depth to form the anchor holes; The pressure-maintaining grouting device and the grouting machine are used to grout the bottom of the anchor hole to form a bottom reinforcement area, one end of the pressure-maintaining grouting device is connected to the outer casing, one end of the inner drill rod is connected to the power head of the drilling rig, and the other end of the inner drill rod passes through the pressure-maintaining grouting device. The grouting machine grouts the bottom area of the outer casing located in the anchor hole through the inner drill rod to form a grouting consolidation body; The boot is installed in the grouting consolidation body and is used to pull the anchor rod and / or anchor cable.

2. The boot-type anchor bolt and cable casing bottom sealing grouting system below the groundwater level according to claim 1 is characterized in that: The outer diameter of the outer sleeve is set to 60 mm to 200 mm, and the outer diameter of the inner drill rod is set to 50 mm to 114 mm.

3. The boot-type anchor bolt and cable casing bottom sealing grouting system below the groundwater level according to claim 1 is characterized in that: The boot cover includes a boot cover columnar body and a cone connected to the bottom of the columnar body. The outer diameter of the boot cover is set to 60 mm to 200 mm, and the length is set to 50 cm to 200 cm.

4. The boot-type anchor bolt and cable casing bottom sealing grouting system below the groundwater level according to claim 3 is characterized in that: A barbed steel bar or steel pipe with a length of 50 to 100 centimeters is provided at the bottom of the cone of the boot cover. The diameter of the steel bar is set to 18 to 25 millimeters, and the diameter of the steel pipe is set to 20 to 50 millimeters.

5. The boot-type anchor bolt and cable casing bottom sealing grouting system below the groundwater level according to claim 1 is characterized in that: The pressure-maintaining grouting device includes: a hollow cavity, a casing port provided at one end of the hollow cavity, a first grouting end plate provided at the other end of the hollow cavity, a second grouting end plate bolted to the first grouting end plate, and a sealing chamber body clamped between the first grouting end plate and the second grouting end plate, wherein the inner wall of the casing port is provided with an internal thread for threaded connection with the outer casing, the first grouting end plate, the second grouting end plate and the sealing chamber body are provided with coaxial through holes, a sealing member is provided in the sealing chamber body, and the inner diameter of the sealing member matches the outer diameter of the inner drill rod.

6. The boot-type anchor bolt and cable casing bottom sealing grouting system below the groundwater level according to claim 5 is characterized in that: The outer diameter of the inner drill rod is 1 to 2 cm smaller than the diameter of the through hole of the sealing chamber, and the diameter of the through hole of the first grouting end plate is 1 to 2 cm larger than the outer diameter of the inner drill rod.

7. The boot-type anchor bolt and cable casing bottom sealing grouting system below the groundwater level according to claim 6 is characterized in that: The sealing element is a V-shaped combined sealing element.

8. The boot-type anchor bolt and cable casing bottom sealing grouting system below the groundwater level according to claim 5 is characterized in that: It also includes an orifice anti-burst device installed at the orifice of the enclosure structure, the orifice anti-burst device includes: a fixing plate group, a sealing plate and a positioning plate group, wherein, The fixing plate assembly includes a first end plate fixed to the enclosure structure, a first connecting plate connected to the top end of the first end plate and extending outward, a second connecting plate connected to the bottom end of the first end plate and extending outward, and a second end plate connected between the first connecting plate and the second connecting plate, the length of the first connecting plate is less than the length of the second connecting plate, and the angle between the first end plate and the second end plate is set to be 15 to 25 degrees; The sealing plate is arranged on the outer surface of the second end plate; The positioning plate assembly is pressed onto the outer edge of the sealing plate and fixed to the second end plate; A first through hole is opened at the center of the first end plate, a second through hole is opened at the center of the second end plate, and a central through hole is opened at the center of the sealing plate, so that the outer sleeve passes through the central through hole, the second through hole and the first through hole in sequence and enters the ground.

9. The boot-type anchor bolt and cable casing bottom sealing grouting system below the groundwater level according to claim 8 is characterized in that: The hollow cavity is integrally connected to the first end plate.

10. The boot-type anchor bolt and cable casing bottom sealing grouting system below the groundwater level according to claim 8, characterized in that: The positioning plate group includes a plurality of pressing plate pieces, and each pressing plate piece is arranged around the outer edge of the sealing plate.

Images