Rock stratum non-bonded pressure-bearing self-locking cone-type prestressed anti-floating anchor rod and construction method thereof

Abstract

The present invention proposes a rock stratum non-bonded pressure-bearing self-locking cone-type prestressed anti-floating anchor rod and a construction method thereof. First, construction layout is carried out on Yancheng according to the construction drawings, and then holes are drilled at selected positions. After drilling, the inside of the holes is cleaned, and then the anchor rods, pads, and supporting steel bars can be installed, and then grouting can be carried out. Finally, guardrails are installed to prevent outsiders from entering the construction area, thereby ensuring that the rod head of the self-locking cone-type anti-floating anchor rod is not touched, thereby improving the construction quality. The present invention can effectively deal with some weak interlayers and the like by optimizing the construction method and preventing the anchor rod from detaching from the concrete, thereby improving the structural strength of the construction structure and ensuring the stability and safety of the overall anchor rod structure.

Description

Technical Field

[0001] The invention relates to the technical field of anti-floating anchor rod construction, in particular to a rock stratum non-bonded pressure-bearing self-locking cone type prestressed anti-floating anchor rod and a construction method thereof. Background Art

[0002] Anti-floating anchor rods are a type of anti-floating measure for underground structures in construction projects. Anti-floating anchor rods are different from general foundation piles. Anti-floating piles are pull-out resistant pile bodies that bear tensile force. The force on ordinary anti-floating piles is also transmitted from the top of the pile to the bottom of the pile. The magnitude of the force on the pile body changes with the change of the groundwater level. However, the current anti-floating anchor rods only rely on the adhesion between the anchor rod and the concrete to withstand the tensile force to achieve the anti-floating effect. When the anti-floating anchor rod is subjected to a large buoyancy, it is easy to cause the anchor rod to separate from the concrete, resulting in the failure of the anti-floating anchor rod.

[0003] In order to solve the above technical problems, we improved and optimized the traditional anti-floating anchor construction method and invented the rock-unbonded pressure-bearing self-locking cone prestressed anti-floating anchor construction method. Summary of the invention

[0004] The purpose of the present invention is to provide a rock-unbonded, pressure-bearing, self-locking conical prestressed anti-floating anchor rod and a construction method thereof, which can effectively deal with some weak interlayers and the like by optimizing the construction method and preventing the anchor rod from separating from the concrete, thereby improving the structural strength of the construction structure and ensuring the stability and safety of the overall anchor rod structure.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] The rock formation non-bonded pressure-bearing self-locking conical prestressed anti-floating anchor rod is characterized in that it includes a cylinder, a rectangular groove is opened on the side of the cylinder, a locking head is installed in the rectangular groove and rotates up and down relative to the rectangular groove, a cylinder cover is installed on the top of the cylinder, a support assembly and a connecting column are installed in the cylinder, a through hole is opened in the middle of the cylinder cover, and the connecting column is installed in the cylinder through the through hole, and the support assembly includes a movable disk, a support rod and a support spring, and the movable disk and the support spring are both sleeved on the connecting column, one end of the support spring is fixed on the lower end surface of the cylinder cover, and the other end is fixed on the upper end surface of the movable disk. The two ends of the support rod are respectively rotatably connected to the side wall of the movable disk and the inner wall of the lock head. A base is connected under the cylinder, and a locking assembly is installed in the base. The locking assembly includes a rotating seat, a locking block, a connecting spring, a limit frame and a limit block. The limit block is fixed to the outer wall of the connecting column, the limit block is fixed to the outer wall of the connecting column, the rotating seat is fixed to the inner wall of the base, and the locking block is rotatably installed in the rotating seat. One end of the connecting spring is connected to the upper end surface of the locking block, and the other end is connected to the inner wall of the base. One end of the limit frame is connected to the locking block, and the other end is against the inner wall of the base.

[0007] In the above structure: the self-locking conical anti-floating anchor rod comprises a cylinder, a rectangular groove is provided on the side of the cylinder, a locking head is installed in the rectangular groove and rotates up and down relative to the rectangular groove, a supporting assembly and a connecting column are installed in the cylinder, the supporting assembly comprises a moving disk, a supporting rod and a supporting spring, a base is connected under the cylinder, a locking assembly is installed in the base, and the locking assembly comprises a limit block and a self-locking part. When used on site, firstly, drilling is performed on the construction site, then the anti-floating anchor rod is implanted in the hole, and the verticality of the rod body is ensured, and then an axial force is applied to the threaded steel bar to move the connecting column downward, thereby driving the moving disk to move downward, and the four hinges are connected. Under the action of the support rod, the four locking heads are driven to rotate to the outside of the rectangular groove with the rotating shaft as the axis, and the locking heads are expanded to form a conical enlarged head at the bottom of the hole. In the process of the connecting column moving downward, the four locking blocks are driven to rotate downward under the action of the limit block. When the limit block rotates to the bottom of the locking block, the locking block is reset under the elastic action of the connecting spring, and is offset against the corresponding limit frame to limit its upward rotation. The position of the connecting column is limited by the cooperation of the limit block and the locking block and the elastic action of the support spring, so as to complete the self-locking of the four locking heads. Finally, mortar is poured into the hole to connect the anchored body and the substrate as a whole.

[0008] As a preferred technical solution of the present invention: it also includes a water stop pad and a fixing nut, the fixing nut is fixed above the threaded steel bar, two fixing nuts are provided, and the water stop pad is installed between the two fixing nuts.

[0009] In the above structure: the fixing nut is used to limit the moving stroke of the water-stop pad, and the water-stop pad can be provided to prevent groundwater from seeping out.

[0010] As a preferred technical solution of the present invention: it also includes a limiting plate, which is fixedly installed at the connection between the connecting column and the threaded steel bar, and the diameter of the limiting plate is larger than the diameter of the through hole.

[0011] In the above structure: the limit plate is fixedly installed at the connection between the connecting column and the threaded steel bar, and is used to limit the moving stroke of the connecting column to prevent the connecting column from moving too deep downward.

[0012] As a preferred technical solution of the present invention: the support assembly also includes a first hinge seat and a second hinge seat, the first hinge seat is fixed on the outer wall of the movable disk, the second hinge seat is fixed on the inner wall of the lock head, one end of the support rod is rotatably mounted on the first hinge seat, and the other end is rotatably mounted on the second hinge seat.

[0013] In the above structure: the support assembly also includes a first hinge seat and a second hinge seat, and the support rod is rotatably installed by setting the first hinge seat and the second hinge seat, so that the lock head can be quickly opened when the connecting column moves downward.

[0014] As a preferred technical solution of the present invention: The limiting frame includes a cross bar and a vertical bar. The cross bar is perpendicularly connected to the vertical bar. The other end of the vertical bar is perpendicularly connected to the locking block. The other end of the cross bar abuts against the inner wall of the base.

[0015] In the above structure: The limiting frame includes a cross bar and a vertical bar. The cross bar and the vertical bar are perpendicularly connected. One end of the vertical bar is fixed to the locking block. The cross bar abuts against the inner wall of the base, which can ensure that the locking blocks are parallel and facilitate the contact between the limiting blocks and them.

[0016] As a preferred technical solution of the present invention: Rotating shafts are respectively installed on opposite side walls of the rectangular groove. The rotating shafts are located at one-sixth of the side wall of the rectangular groove. The lock head is rotatably installed on the inner wall of the rectangular groove through the rotating shafts.

[0017] In the above structure: Rotating shafts are respectively installed on opposite side walls of the rectangular groove for installing the lock head. The rotating shafts are located at the upper positions of the two side walls of the rectangular groove, which facilitates the up-and-down opening and closing rotation of the lock head.

[0018] As a preferred technical solution of the present invention: Four rectangular grooves are provided. Lock heads are rotatably connected to all four rectangular grooves through rotating shafts. Four groups of support components are provided. The four groups of support components are respectively and correspondingly installed with the lock heads in the rectangular grooves.

[0019] In the above structure: Four rectangular grooves are provided. Lock heads are rotatably connected to all four rectangular grooves through rotating shafts. The four groups of support components are respectively and correspondingly installed with the lock heads in the rectangular grooves, so that when the lock heads are expanded, a conical enlarged head can be formed at the bottom of the hole.

[0020] The construction method of the non-bonded bearing pressure self-locking conical prestressed anti-floating anchor rod in rock strata is characterized by comprising the following steps:

[0021] Step 1: Construction layout:

[0022] The foundation pit is excavated to the preset elevation. The anti-floating self-locking anchor rod drilling is layout-positioned according to the construction drawings, so that the empty position error is not greater than 100 mm, and the control point of the hole depth is that the rock entry is greater than 1 meter;

[0023] Step 2: Drilling:

[0024] Prepare an engineering drill. Position the engineering drill according to the drilled hole position where the line has been laid. The drilling diameter is 110 mm. After the drill hole penetrates into the rock stratum by more than 1 meter, stop drilling, withdraw the drill pipe, and use a φ76 reaming bit to carry out reaming construction at the bottom of the hole. The maximum reaming diameter is φ120. During the drilling construction, keep the rod body vertical, and the deviation rate is not greater than 2%;

[0025] Step 3: Hole cleaning:

[0026] Clean the expanded hole and remove the rock and soil residue at the bottom of the hole;

[0027] Step 4: Implant the anchor rod:

[0028] A self-locking cone-type anti-floating anchor rod is implanted in the installation hole, and the verticality of the rod body is ensured. Then, the enlarged locking head of the self-locking cone-type anti-floating anchor rod is pressurized to expand the enlarged locking head to form a positive cone-shaped enlarged head at the bottom of the hole;

[0029] Step 5: Install the backing plate:

[0030] Install eight supporting steel bars on the surface of the water stop pad, pass the supporting steel bars through the through holes of the water stop pad, and then install the water stop pad on the top of the self-locking cone anti-floating anchor rod;

[0031] Step 6: Implant support reinforcement:

[0032] The supporting steel bar is implanted into the mounting hole so that the first mounting plate on the supporting steel bar and the second mounting plate on the self-locking cone anti-floating anchor are at the same horizontal plane, and then the steel bar is welded and fixed between the corresponding first mounting plate and the second mounting plate to define the position of the supporting steel bar;

[0033] Step 7: Grouting:

[0034] Check the installation quality of the self-locking cone anti-floating anchor rod, and check the installation depth and verticality. After the inspection is qualified, carry out grouting work and adjust the position of the water stop pad so that the water stop pad is installed to the top of the installation hole, and limit the position of the water stop pad by tightening the limit seat;

[0035] Step 8: Install the guardrail:

[0036] After the grouting operation is completed, keep the rod head of the self-locking cone anti-floating anchor rod intact, install a guardrail on the top of the rock formation, rotate the rotating ring on the guardrail to make the positions of adjacent connecting plates correspond, and install fixing bolts between the corresponding two connecting plates.

[0037] In the above structure: The present invention proposes a construction method for a non-bonded, pressure-bearing, self-locking cone-type prestressed anti-floating anchor rod in rock strata. By optimizing the construction method and preventing the anchor rod from separating from the concrete, it can effectively deal with some weak interlayers and the like, and improve the structural strength of the construction structure, thereby ensuring the stability and safety of the overall anchor rod structure.

[0038] First, lay out the construction according to the drawings and select the drilling location.

[0039] Then, prepare the engineering drilling rig and position the engineering drilling rig according to the drilling position where the line is laid. After the hole is drilled into the rock layer for more than 1 meter, stop drilling, withdraw the drill rod, and use the φ76 reaming drill bit to expand the hole at the bottom of the hole.

[0040] Then, the hole is cleaned at the expanded part, and rocks and soil residues at the bottom of the hole are removed. After cleaning, a self-locking conical anti-floating anchor rod is implanted in the installation hole. When the anchor rod is implanted, the verticality of the rod body is ensured. Then, axial force is applied to the threaded steel bar to make the connecting column move downward, thereby driving the moving plate to move downward, and under the action of the four hinged support rods, the four locking heads are driven to rotate to the outside of the rectangular groove with the rotating shaft as the axis, and the locking head is expanded to form a conical enlarged head at the bottom of the hole. In the process of the connecting column moving downward, the four locking blocks are driven to rotate downward under the action of the limit block. When the limit block rotates to the bottom of the locking block, the locking block is reset under the elastic action of the connecting spring, and is offset against the corresponding limit frame to limit its upward rotation. The position of the connecting column is limited by the cooperation of the limit block and the locking block and the elastic action of the supporting spring, and the self-locking of the four locking heads is completed.

[0041] Then, check the installation quality of the self-locking cone anti-floating anchor rod, and carry out the installation depth, verticality and other inspections. After the inspection is qualified, carry out the grouting operation. The supporting steel bars and the positioning steel bars on their surface can effectively deal with some weak interlayers and other situations, and improve the structural strength of the construction structure, thereby ensuring the stability and safety of the overall anchor rod structure.

[0042] Finally, a guardrail is installed on the top of the rock formation, and the rotating ring on the guardrail is rotated to make the positions of adjacent connecting plates correspond to each other, and fixing bolts are installed between the two corresponding connecting plates to achieve the blockade of the construction site. This can prevent disturbance near the working area, ensure that the rod head of the self-locking cone anti-floating anchor is not moved, and improve the construction quality.

[0043] As a preferred technical solution of the present invention: an installation hole is opened at the center of the waterstop pad, and steel bar holes are opened at equal intervals along the circumferential direction of the waterstop pad. The waterstop pad is installed on the self-locking cone anti-floating anchor rod through the installation hole, and the supporting steel bars are installed in the steel bar holes.

[0044] In the above structure: installation holes and steel bar holes are opened on the water stop pad, the water stop pad is installed on the self-locking cone anti-floating anchor rod through the installation hole, and the supporting steel bar is installed in the steel bar hole to realize its installation and fixation.

[0045] As a preferred technical solution of the present invention: the limit seat is installed on the upper fixing nut. When the limit seat is tightened, the limit seat drives the upper fixing nut to limit the position of the water stop pad.

[0046] In the above structure: two fixing nuts are installed on the self-locking conical anti-floating anchor rod, and the waterstop pad is located between the fixing nuts to realize the limitation and fixation of the waterstop pad. The limit seat is installed on the upper fixing nut. When the limit seat is tightened, the limit seat drives the upper fixing nut to limit the position of the waterstop pad and adjust its position.

[0047] As a preferred technical solution of the present invention: the first mounting plate is sleeved on the supporting steel bar, the second mounting plate is sleeved on the self-locking cone anti-floating anchor rod, and the first mounting plate and the second mounting plate are connected by fixing the steel bar.

[0048] In the above structure: the first mounting plate is sleeved on the supporting steel bar, the second mounting plate is sleeved on the self-locking cone anti-floating anchor rod, and the first mounting plate and the second mounting plate are connected by fixing the steel bar to realize the installation and fixation of the supporting steel bar on the self-locking cone anti-floating anchor rod.

[0049] As a preferred technical solution of the present invention: positioning steel bars are installed on the outer wall of the supporting steel bars, and the positioning steel bars are installed and fixed in sequence along the length direction of the supporting steel bars.

[0050] As a preferred technical solution of the present invention: the upper end of the supporting steel bar is bent at ninety degrees.

[0051] In the above structure: positioning steel bars are installed on the outer wall of the supporting steel bars, and the positioning steel bars realize the positioning of the supporting steel bars so that they will not deviate in the drill hole. The upper end of the supporting steel bars is bent at 90 degrees to prevent them from injuring construction workers.

[0052] As a preferred technical solution of the present invention: the guardrail includes a fixed rod and a guardrail, the inner wall of the bearing is fixedly sleeved on the fixed rod, the rotating ring is fixedly sleeved on the outer wall of the bearing, the connecting plate is fixedly connected to the outer wall of the rotating ring, and adjacent connecting plates are connected and fixed by fixing bolts.

[0053] In the above structure: the guardrail includes a fixed rod and a guardrail, which prevents outsiders from entering the working area, ensures that the rod head of the self-locking cone anti-floating anchor rod is not touched, and improves the construction quality. The inner wall of the bearing is fixedly sleeved on the fixed rod, and the rotating ring is fixedly sleeved on the outer wall of the bearing. The connecting plate is fixedly connected to the outer wall of the rotating ring, and adjacent connecting plates are connected and fixed by fixing bolts, thereby realizing protection between adjacent fixed rods and further preventing outsiders from entering.

[0054] Compared with the prior art, the present invention has the following beneficial effects:

[0055] The present invention adopts a self-locking cone anti-floating anchor rod, so that the anchored body and the base material are connected as a whole, which can give full play to the advantage of large anchoring force, reduce the length of the anchoring section, and anchor reliably; the support steel bars and the positioning steel bars on the surface of the support steel bars can effectively deal with some weak interlayers and the like, improve the structural strength of the construction structure, and thus ensure the stability and safety of the overall anchor rod structure; the guardrails can prevent disturbances near the working area, ensure that the rod head of the self-locking cone anti-floating anchor rod is not touched, and improve the construction quality;

[0056] The self-locking conical anti-floating anchor applies axial force to the threaded steel bar to move the movable disk downward. Under the action of the hinged support rod, the four locking heads rotate to the outside of the rectangular groove with the rotating shaft as the axis, and the locking heads are expanded to form a conical enlarged head at the bottom of the hole, so that the anchored body and the base material are connected as a whole, which can give full play to the advantage of large anchoring force, reduce the length of the anchoring section, and anchor reliably. The locking assembly can be set to self-lock the connecting column to prevent the locking head from shrinking due to the reset of the connecting column, which affects the anchoring effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a schematic diagram of the method flow of the present invention;

[0058] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0059] Figure 3 It is a schematic diagram of the installation structure of the self-locking conical anti-floating anchor rod of the present invention;

[0060] Figure 4 For the present invention Figure 3 Schematic diagram of the bottom structure;

[0061] Figure 5 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0062] Figure 6 It is an overall schematic diagram of the self-locking cone anti-floating anchor;

[0063] Figure 7 It is a schematic diagram of the cross-sectional structure of the middle cylinder of the self-locking cone anti-floating anchor;

[0064] Figure 8 It is a schematic diagram of the structure of the self-locking cone-shaped anti-floating anchor in the expanded state;

[0065] Fig. 9 It is an enlarged structural schematic diagram of the support assembly in the self-locking cone anti-floating anchor;

[0066] Fig.10 It is a schematic diagram of the enlarged structure of the locking component in the self-locking cone-type anti-floating anchor.

[0067] List of reference numerals:

[0068] 1. rock layer; 2. mounting hole; 3. self-locking cone anti-floating anchor rod; 31. cylinder; 32. rectangular groove; 33. rotating shaft; 34. locking head; 35. cylinder cover; 3501. through hole; 36. connecting column; 37. limit plate; 38. support assembly; 3801. moving plate; 3802. first hinge seat; 3803. support rod; 3804. second hinge seat; 3805. support spring; 39. locking assembly; 3901. rotating shaft Moving seat; 3902, locking block; 3903, connecting spring; 3904, limiting frame; 3905, limiting block; 310, base; 311, threaded steel; 4, supporting steel bars; 401, positioning steel bars; 5, first mounting plate; 6, fixing steel bars; 7, second mounting plate; 8, water stop pad; 9, limiting seat; 10, guardrail; 11, bearing; 12, rotating ring; 13, connecting plate; 14, fixing bolt; 15, fixing nut. DETAILED DESCRIPTION

[0069] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0070] like Figure 6-10As shown: The present invention proposes a rock formation non-bonded pressure-bearing self-locking cone prestressed anti-floating anchor rod, including a cylinder 31, a rectangular groove 32 is opened on the side of the cylinder 31, a lock head 34 that rotates up and down relative to the rectangular groove 32 is installed in the rectangular groove 32, a cylinder cover 35 is installed above the cylinder 31, a support assembly 38 and a connecting column 36 are installed in the cylinder 31, a through hole 3501 is opened in the middle of the cylinder cover 35, the connecting column 36 is installed in the cylinder 31 through the through hole 3501, the support assembly 38 includes a moving disk 3801, a support rod 3803 and a support spring 3805, the moving disk 3801 and the support spring 3805 are both sleeved on the connecting column 36, one end of the support spring 3805 is fixed on the lower end surface of the cylinder cover 35, and the other end is fixed on the upper end surface of the moving disk 3801, and both ends of the support rod 3803 They are respectively rotatably connected to the side wall of the movable disk 3801 and the inner wall of the lock head 34. A base 310 is connected below the cylinder 31. A locking assembly 39 is installed in the base 310. The locking assembly 39 includes a rotating seat 3901, a locking block 3902, a connecting spring 3903, a limiting frame 3904 and a limiting block 3905. The limiting block 3905 is fixed on the outer wall of the connecting column 36. The limiting block 3905 is fixed on the outer wall of the connecting column 36. The rotating seat 3901 is fixed on the inner wall of the base 310. The locking block 3902 is rotatably installed in the rotating seat 3901. One end of the connecting spring 3903 is connected to the upper end surface of the locking block 3902, and the other end is connected to the inner wall of the base 310. One end of the limiting frame 3904 is connected to the locking block 3902, and the other end is against the inner wall of the base 310.

[0071] The self-locking conical anti-floating anchor includes a cylinder 31, a rectangular groove 32 is provided on the side of the cylinder 31, a locking head 34 is installed in the rectangular groove 32 and rotates up and down relative to the rectangular groove 32, a support assembly 38 and a connecting column 36 are installed in the cylinder 31, the support assembly 38 includes a movable disk 3801, a support rod 3803 and a support spring 3805, a base 310 is connected below the cylinder 31, a locking assembly 39 is installed in the base 310, the locking assembly 39 includes a limit block 3905 and a self-locking part, when it is used on site, firstly, drilling is carried out on the construction site, then the anti-floating anchor is implanted in the hole, and the verticality of the rod body is ensured, then axial force is applied to the threaded steel 311 to move the connecting column 36 downward, thereby driving the movable disk 3801 to move downward, and the four hinged support rods are locked. Under the action of 3803, the four locking heads 34 are driven to rotate to the outside of the rectangular groove 32 with the rotating shaft 33 as the axis, and the locking heads 34 are expanded to form a conical enlarged head at the bottom of the hole. In the process of the connecting column 36 moving downward, the four locking blocks 3902 are driven to rotate downward under the action of the limit block 3905. When the limit block 3905 rotates to the bottom of the locking block 3902, the locking block 3902 is reset under the elastic action of the connecting spring 3903, and is offset against the corresponding limit frame 3904 to limit its upward rotation. The position of the connecting column 36 is limited by the cooperation between the limit block 3905 and the locking block 3902 and the elastic action of the supporting spring 3805, so as to complete the self-locking of the four locking heads 34. Finally, mortar is poured into the hole to connect the anchored body and the substrate as a whole.

[0072] In this embodiment, it also includes a water stop pad 8 and a fixing nut 15, the fixing nut 15 is fixed on the threaded steel 311, two fixing nuts 15 are provided, and the water stop pad 8 is installed between the two fixing nuts 15. The fixing nut 15 is used to limit the moving stroke of the water stop pad 8, and the water stop pad 8 can prevent groundwater from seeping out.

[0073] In this embodiment, a limit plate 37 is also included, and the limit plate 37 is fixedly installed at the connection between the connecting column 36 and the threaded steel 311, and the diameter of the limit plate 37 is larger than the diameter of the through hole 3501. The limit plate 37 is fixedly installed at the connection between the connecting column 36 and the threaded steel 311, and is used to limit the movement stroke of the connecting column 36 to prevent the connecting column 36 from moving too deep downward.

[0074] In this embodiment: the support assembly 38 further includes a first hinge seat 3802 and a second hinge seat 3804, the first hinge seat 3802 is fixed on the outer wall of the moving plate 3801, the second hinge seat 3804 is fixed on the inner wall of the lock head 34, one end of the support rod 3803 is rotatably mounted on the first hinge seat 3802, and the other end is rotatably mounted on the second hinge seat 3804. The support assembly 38 further includes a first hinge seat 3802 and a second hinge seat 3804, and the support rod 3803 is rotatably mounted by setting the first hinge seat 3802 and the second hinge seat 3804, so that when the connecting column 36 moves downward, the lock head 34 can be quickly propped open.

[0075] In this embodiment: the limit frame 3904 includes a horizontal bar and a vertical bar, the horizontal bar is vertically connected to the vertical bar, the other end of the vertical bar is vertically connected to the locking block 3902, and the other end of the horizontal bar is against the inner wall of the base 310. The limit frame 3904 includes a horizontal bar and a vertical bar, the horizontal bar and the vertical bar are vertically connected, one end of the vertical bar is fixed on the locking block 3902, and the horizontal bar is against the inner wall of the base 310, which can ensure that the locking block 3902 is parallel, so that the limit block 3905 can contact it.

[0076] In this embodiment: the two opposite side walls in the rectangular groove 32 are respectively installed with a rotating shaft 33, the rotating shaft 33 is located at one sixth of the side wall of the rectangular groove 32, and the lock head 34 is rotatably installed on the inner wall of the rectangular groove 32 through the rotating shaft 33. The two opposite side walls in the rectangular groove 32 are respectively installed with a rotating shaft 33 for realizing the installation of the lock head 34, and the rotating shaft 33 is located at the upper position of the two side walls of the rectangular groove 32, so as to facilitate the up and down opening and closing rotation of the lock head 34.

[0077] In this embodiment: there are four rectangular grooves 32, each of which is rotatably connected to a lock head 34 via a rotating shaft 33, and there are four groups of support assemblies 38, which are respectively installed corresponding to the lock heads 34 in the rectangular grooves 32. There are four rectangular grooves 32, each of which is rotatably connected to a lock head 34 via a rotating shaft 33, and there are four groups of support assemblies 38, which are respectively installed corresponding to the lock heads 34 in the rectangular grooves 32, so that when the lock heads 34 are expanded, a conical enlarged head can be formed at the bottom of the hole.

[0078] like Figure 1-5 As shown: The construction method of the rock layer unbonded pressure-bearing self-locking cone prestressed anti-floating anchor rod includes the following steps:

[0079] Step 1: Construction layout:

[0080] The foundation pit is excavated to the preset elevation, and the anti-floating self-locking anchor holes are laid out and positioned according to the construction drawings, so that the position error is no more than 100 mm, and the hole depth control point is more than 1 meter into the rock;

[0081] Step 2: Drilling:

[0082] Prepare the engineering drilling rig and position it according to the drilling position where the line is laid. The diameter of the drilling hole is 110 mm. After the hole is drilled into the rock layer for more than 1 meter, stop drilling, withdraw the drill rod, and use a φ76 reaming drill bit to expand the hole at the bottom of the hole. The maximum hole diameter is φ120. During the drilling construction, keep the rod vertical and the deflection rate is not more than 2%;

[0083] Step 3: Cleaning the hole:

[0084] Clean the expanded hole and remove the rock and soil residue at the bottom of the hole;

[0085] Step 4: Implant the anchor rod:

[0086] A self-locking cone-type anti-floating anchor rod is implanted in the installation hole 2, and the verticality of the rod body is ensured. Then, the enlarged locking head 34 of the self-locking cone-type anti-floating anchor rod is pressurized to expand the enlarged locking head 34 to form a positive cone-shaped enlarged head at the bottom of the hole;

[0087] Step 5: Install the backing plate:

[0088] Install eight supporting steel bars 4 on the surface of the water stop pad 8, pass the supporting steel bars 4 through the through holes 3501 of the water stop pad 8, and then install the water stop pad 8 on the top of the self-locking cone anti-floating anchor rod;

[0089] Step 6: Implant support reinforcement 4:

[0090] The support steel bar 4 is implanted into the mounting hole 2, so that the first mounting plate 5 on the support steel bar 4 and the second mounting plate 7 on the self-locking cone anti-floating anchor are at the same horizontal plane, and then the steel bar 6 is welded and fixed between the corresponding first mounting plate 5 and the second mounting plate 7 to limit the position of the support steel bar 4;

[0091] Step 7: Grouting:

[0092] Check the installation quality of the self-locking cone anti-floating anchor rod, and check the installation depth and verticality. After the inspection is qualified, perform grouting and adjust the position of the water stop pad 8 so that the water stop pad 8 is installed to the top of the installation hole 2, and limit the position of the water stop pad 8 by tightening the limit seat 9;

[0093] Step 8: Install guardrail 10:

[0094] After the grouting operation is completed, the rod head of the self-locking cone anti-floating anchor is kept intact, and the guardrail 10 is installed on the top of the rock layer 1, and the rotating ring 12 on the guardrail 10 is rotated to make the positions of adjacent connecting plates 13 correspond, and the fixing bolts 14 are installed between the corresponding two connecting plates 13.

[0095] The present invention proposes a construction method for a non-bonded, pressure-bearing, self-locking cone-type prestressed anti-floating anchor rod in rock strata. By optimizing the construction method and preventing the anchor rod from separating from the concrete, it can effectively deal with some weak interlayers and the like, improve the structural strength of the construction structure, and thus ensure the stability and safety of the overall anchor rod structure.

[0096] First, lay out the construction according to the drawings and select the drilling location.

[0097] Then, prepare the engineering drilling rig and position the engineering drilling rig according to the drilling position where the line is laid. After the hole is drilled into the rock layer for more than 1 meter, stop drilling, withdraw the drill rod, and use a φ76 reaming drill bit to expand the hole at the bottom of the hole.

[0098] Then, the hole is cleaned at the expanded part to remove rocks and soil residues at the bottom of the hole. After cleaning, a self-locking cone-type anti-floating anchor rod is implanted in the installation hole 2. When implanting the anchor rod, the verticality of the rod body is ensured. Then, an axial force is applied to the threaded steel bar 311 to move the connecting column 36 downward, thereby driving the moving plate 3801 to move downward. Under the action of the four hinged support rods 3803, the four locking heads 34 are driven to rotate to the outside of the rectangular groove 32 with the rotating shaft 33 as the axis, and the locking heads 34 are expanded to form a conical enlarged head at the bottom of the hole, and When the connecting column 36 moves downward, the four locking blocks 3902 are driven to rotate downward under the action of the limit block 3905. When the limit block 3905 rotates to the bottom of the locking block 3902, the locking block 3902 is reset under the elastic action of the connecting spring 3903, and the corresponding limit frame 3904 is abutted to limit its upward rotation. The position of the connecting column 36 is limited by the cooperation of the limit block 3905 and the locking block 3902 and the elastic action of the supporting spring 3805, so that the self-locking of the four lock heads 34 is completed.

[0099] Then, check the installation quality of the self-locking cone anti-floating anchor rod, and check the installation depth, verticality, etc. After the inspection is qualified, carry out grouting operation. The supporting steel bar 4 and the positioning steel bar 401 on its surface can effectively deal with some weak interlayers and other situations, improve the structural strength of the construction structure, thereby ensuring the stability and safety of the overall anchor rod structure.

[0100] Finally, a guardrail 10 is installed on the top of the rock layer 1, and the rotating ring 12 on the guardrail 10 is rotated to make the positions of adjacent connecting plates 13 correspond to each other, and fixing bolts 14 are installed between the two corresponding connecting plates 13 to achieve the blockade of the construction site. This can prevent disturbance near the working area, ensure that the rod head of the self-locking cone anti-floating anchor rod is not moved, and improve the construction quality.

[0101] In this embodiment: the water stop pad 8 is provided with a mounting hole 2 at the center thereof, and steel bar holes are provided at equal intervals along the circumferential direction of the water stop pad 8. The water stop pad 8 is installed on the self-locking cone anti-floating anchor rod through the mounting hole 2, and the support steel bar 4 is installed in the steel bar hole. The water stop pad 8 is provided with a mounting hole 2 and a steel bar hole. The water stop pad 8 is installed on the self-locking cone anti-floating anchor rod through the mounting hole 2, and the support steel bar 4 is installed in the steel bar hole to achieve its installation and fixation.

[0102] In this embodiment: the limit seat 9 is installed on the upper fixing nut 15. When the limit seat 9 is tightened, the limit seat 9 drives the upper fixing nut 15 to limit the position of the water stop pad 8. Two fixing nuts 15 are installed on the self-locking cone anti-floating anchor rod. The water stop pad 8 is located between the fixing nuts 15 to limit and fix the water stop pad 8. The limit seat 9 is installed on the upper fixing nut 15. When the limit seat 9 is tightened, the limit seat 9 drives the upper fixing nut 15 to limit the position of the water stop pad 8 and adjust its position.

[0103] In this embodiment: the first mounting plate 5 is sleeved on the supporting steel bar 4, the second mounting plate 7 is sleeved on the self-locking cone anti-floating anchor rod, and the first mounting plate 5 and the second mounting plate 7 are connected by the fixing steel bar 6. The first mounting plate 5 is sleeved on the supporting steel bar 4, the second mounting plate 7 is sleeved on the self-locking cone anti-floating anchor rod, and the first mounting plate 5 and the second mounting plate 7 are connected by the fixing steel bar 6, so as to realize the installation and fixation of the supporting steel bar 4 on the self-locking cone anti-floating anchor rod.

[0104] In this embodiment: a positioning steel bar 401 is installed on the outer wall of the support steel bar 4, and the positioning steel bars 401 are installed and fixed in sequence along the length direction of the support steel bar 4. The upper end of the support steel bar 4 is bent at 90 degrees.

[0105] A positioning steel bar 401 is installed on the outer wall of the supporting steel bar 4. The positioning steel bar 401 realizes the positioning of the supporting steel bar 4 so that it will not deviate in the drill hole. The upper end of the supporting steel bar 4 is bent at 90 degrees to prevent it from hurting construction workers.

[0106] In this embodiment: the guardrail 10 includes a fixed rod and a guardrail, the inner wall of the bearing 11 is fixedly sleeved on the fixed rod, the rotating ring 12 is fixedly sleeved on the outer wall of the bearing 11, the connecting plate 13 is fixedly connected to the outer wall of the rotating ring 12, and adjacent connecting plates 13 are connected and fixed by fixing bolts 14. The guardrail 10 includes a fixed rod and a guardrail, and the guardrail 10 is used to prevent outsiders from entering the working area, ensure that the rod head of the self-locking cone anti-floating anchor rod is not touched, and improve the construction quality. The inner wall of the bearing 11 is fixedly sleeved on the fixed rod, the rotating ring 12 is fixedly sleeved on the outer wall of the bearing 11, the connecting plate 13 is fixedly connected to the outer wall of the rotating ring 12, and adjacent connecting plates 13 are connected and fixed by fixing bolts 14, thereby realizing protection between adjacent fixed rods and further preventing outsiders from entering.

[0107] The present invention adopts a self-locking cone anti-floating anchor rod, so that the anchored body and the base material are connected as a whole, which can give full play to the advantage of large anchoring force, reduce the length of the anchoring section, and anchor reliably; the support steel bar 4 and the positioning steel bar 401 on the surface of the support steel bar 4 can effectively deal with some weak interlayers and the like, improve the structural strength of the construction structure, and thus ensure the stability and safety of the overall anchor rod structure; the guardrail 10 can prevent disturbances near the working area, ensure that the rod head of the self-locking cone anti-floating anchor rod is not touched, and improve the construction quality;

[0108] The self-locking conical anti-floating anchor rod applies axial force to the threaded steel bar 311 to move the movable disk 3801 downward. Under the action of the hinged support rod 3803, the four locking heads 34 are rotated to the outside of the rectangular groove 32 with the rotating shaft 33 as the axis, and the locking heads 34 are expanded to form a conical enlarged head at the bottom of the hole, so that the anchored body and the substrate are connected as a whole, which can give full play to the advantage of large anchoring force, reduce the length of the anchoring section, and anchor reliably. The locking assembly 39 is set to self-lock the connecting column 36 to prevent the connecting column 36 from being reset to cause the locking head 34 to shrink, affecting the anchoring effect.

[0109] The above description is only a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.

Claims

1. Rock layer unbonded pressure-bearing self-locking cone prestressed anti-floating anchor rod, Features: The invention comprises a cylinder (31), a rectangular groove (32) is provided on the side of the cylinder (31), a lock head (34) is installed in the rectangular groove (32) and is rotatable relative to the rectangular groove (32), a cylinder cover (35) is installed above the cylinder (31), a support assembly (38) and a connecting column (36) are installed in the cylinder (31), a through hole (3501) is provided in the middle of the cylinder cover (35), and the connecting column (36) passes through the through hole (3501) and is installed on the cylinder ( 31), the support assembly (38) includes a moving plate (3801), a support rod (3803) and a support spring (3805), the moving plate (3801) and the support spring (3805) are both sleeved on the connecting column (36), one end of the support spring (3805) is fixed to the lower end surface of the cylinder cover (35), and the other end is fixed to the upper end surface of the moving plate (3801), and the two ends of the support rod (3803) are respectively rotatably connected to the moving plate (38 01) on the side wall and the inner wall of the lock head (34), the bottom of the cylinder (31) is connected with a base (310), the base (310) is installed with a locking assembly (39), the locking assembly (39) comprises a rotating seat (3901), a locking block (3902), a connecting spring (3903), a limiting frame (3904) and a limiting block (3905), the limiting block (3905) is fixed on the outer wall of the connecting column (36), the limiting block (3905) The rotating seat (3901) is fixed on the outer wall of the connecting column (36), the locking block (3902) is rotatably installed in the rotating seat (3901), one end of the connecting spring (3903) is connected to the upper end surface of the locking block (3902), and the other end is connected to the inner wall of the base (310), and one end of the limiting frame (3904) is connected to the locking block (3902), and the other end is against the inner wall of the base (310).

2. The rock formation unbonded pressure-bearing self-locking cone-type prestressed anti-floating anchor according to claim 1, Features: It also includes a water stop pad (8) and a fixing nut (15), wherein the fixing nut (15) is fixed on the threaded steel (311), two fixing nuts (15) are provided, and the water stop pad (8) is installed between the two fixing nuts (15).

3. The rock formation unbonded pressure-bearing self-locking cone-type prestressed anti-floating anchor according to claim 1, Features: It also includes a limiting plate (37), which is fixedly installed at the connection between the connecting column (36) and the threaded steel bar (311), and the diameter of the limiting plate (37) is larger than the diameter of the through hole (3501).

4. The rock formation unbonded pressure-bearing self-locking cone-type prestressed anti-floating anchor according to claim 1, Features: The support assembly (38) also includes a first hinge seat (3802) and a second hinge seat (3804), wherein the first hinge seat (3802) is fixed on the outer wall of the movable plate (3801), and the second hinge seat (3804) is fixed on the inner wall of the lock head (34), and one end of the support rod (3803) is rotatably mounted on the first hinge seat (3802), and the other end is rotatably mounted on the second hinge seat (3804).

5. The rock formation unbonded pressure-bearing self-locking cone-type prestressed anti-floating anchor according to claim 1, Features: The limiting frame (3904) includes a horizontal bar and a vertical bar, wherein the horizontal bar is vertically connected to the vertical bar, the other end of the vertical bar is vertically connected to the locking block (3902), and the other end of the horizontal bar is against the inner wall of the base (310).

6. The rock formation unbonded pressure-bearing self-locking cone-type prestressed anti-floating anchor according to claim 1, Features: A rotating shaft (33) is respectively installed on two opposite side walls in the rectangular groove (32). The rotating shaft (33) is located at one sixth of the side wall of the rectangular groove (32). The lock head (34) is rotatably installed on the inner wall of the rectangular groove (32) via the rotating shaft (33).

7. The rock formation unbonded pressure-bearing self-locking cone-type prestressed anti-floating anchor according to claim 6, Features: The rectangular grooves (32) are provided with four, and the four rectangular grooves (32) are all rotatably connected with a lock head (34) via a rotating shaft (33). The support components (38) are provided with four groups, and the four groups of support components (38) are respectively installed corresponding to the lock heads (34) in the rectangular grooves (32).

8. The method for constructing a rock formation non-bonded pressure-bearing self-locking cone-type prestressed anti-floating anchor rod according to any one of claims 1 to 7, Features: The steps include: Step 1: Construction layout: The foundation pit is excavated to the preset elevation, and the anti-floating self-locking anchor holes are laid out and positioned according to the construction drawings, so that the position error is no more than 100 mm, and the hole depth control point is more than 1 meter into the rock; Step 2: Drilling: Prepare the engineering drilling rig and position the engineering drilling rig according to the drilling position where the line is laid. The diameter of the drilling hole is 110 mm. After the drilling hole penetrates the rock layer (1) for more than 1 meter, stop drilling, withdraw the drill rod, and use a φ76 reaming drill bit to expand the hole at the bottom of the hole. The maximum hole diameter is φ120. During the drilling construction, keep the rod vertical and the deflection rate is not more than 2%; Step 3: Cleaning the hole: Clean the expanded hole and remove the rock and soil residue at the bottom of the hole; Step 4: Implant the anchor rod: A self-locking cone-type anti-floating anchor rod is implanted in the installation hole (2), and the verticality of the rod body is ensured. Then, the enlarged locking head of the self-locking cone-type anti-floating anchor rod is pressurized to expand the enlarged locking head to form a positive cone-shaped enlarged head at the bottom of the hole; Step 5: Install the backing plate: Install eight supporting steel bars (4) on the surface of the water-stop pad (8), pass the supporting steel bars (4) through the through holes of the water-stop pad (8), and then install the water-stop pad (8) on the top of the self-locking cone anti-floating anchor rod; Step 6: Insert the support reinforcement (4): The support steel bar (4) is implanted into the installation hole (2) so that the first installation plate (5) on the support steel bar (4) and the second installation plate (7) on the self-locking cone anti-floating anchor rod are at the same horizontal plane, and then the steel bar (6) is welded and fixed between the corresponding first installation plate (5) and the second installation plate (7) to limit the position of the support steel bar (4); Step 7: Grouting: Check the installation quality of the self-locking cone anti-floating anchor rod, check the installation depth and verticality, and after the inspection is completed and qualified, perform grouting operations, and adjust the position of the water stop pad (8) so that the water stop pad (8) is installed to the top of the installation hole (2), and limit the position of the water stop pad (8) by tightening the limit seat (9); Step 8: Install the guardrail (10): After the grouting operation is completed, the rod head of the self-locking cone anti-floating anchor rod is kept intact, and a guardrail (10) is installed on the top of the rock layer (1). The rotating ring (12) on the guardrail (10) is rotated to make the positions of adjacent connecting plates (13) correspond to each other, and fixing bolts (14) are installed between the two corresponding connecting plates (13).

9. The rock formation unbonded pressure-bearing self-locking cone-type prestressed anti-floating anchor construction method according to claim 8, Features: A mounting hole (2) is provided at the center of the water stop pad (8), and steel bar holes are provided at equal intervals along the circumference of the water stop pad (8). The water stop pad (8) is installed on the self-locking cone anti-floating anchor rod through the mounting hole (2), and the supporting steel bar (4) is installed in the steel bar hole.

10. The rock formation unbonded pressure-bearing self-locking cone-type prestressed anti-floating anchor construction method according to claim 8, Features: The limit seat (9) is mounted on the upper fixing nut (15). When the limit seat (9) is tightened, the limit seat (9) drives the upper fixing nut (15) to limit the position of the water stop pad (8).

11. The construction method of rock formation non-bonded pressure-bearing self-locking cone prestressed anti-floating anchor rod according to claim 8, Features: The first mounting plate (5) is sleeved on the supporting steel bar (4), the second mounting plate (7) is sleeved on the self-locking cone anti-floating anchor rod, and the first mounting plate (5) and the second mounting plate (7) are connected by a fixing steel bar (6).

12. The rock formation unbonded pressure-bearing self-locking cone-type prestressed anti-floating anchor construction method according to claim 11, Features: Positioning steel bars (401) are installed on the outer wall of the supporting steel bars (4), and the positioning steel bars (401) are installed and fixed in sequence along the length direction of the supporting steel bars (4).

13. The rock formation unbonded pressure-bearing self-locking cone-type prestressed anti-floating anchor construction method according to claim 12, Features: The upper end of the supporting steel bar (4) is bent at ninety degrees.

14. The construction method of rock formation non-bonded pressure-bearing self-locking cone-type prestressed anti-floating anchor rod according to claim 8, Features: The guardrail (10) comprises a fixed rod and a guardrail, the inner wall of the bearing (11) is fixedly sleeved on the fixed rod, the rotating ring (12) is fixedly sleeved on the outer wall of the bearing (11), the connecting plate (13) is fixedly connected to the outer wall of the rotating ring (12), and adjacent connecting plates (13) are connected and fixed by fixing bolts (14).

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