Deep foundation pit grouting construction device
By using the anchor plate to cooperate with the elastic support and arc guide plate of the slider in the deep foundation pit grouting construction device, the problem of unstable anchor insertion is solved, the insertion smoothness and connection strength are improved, and the drilling side is achieved Effective reinforcement of the wall.
Patent Information
- Application Number
- CN202411580683.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2024-12-20
AI Technical Summary
The external anchor rods of existing deep foundation pit grouting anchors are not easy to penetrate when inserted into the drilling hole, which affects the insertion smoothness and bearing capacity, resulting in unstable construction.
A deep foundation pit grouting construction device is designed, including grouting pipe and anchoring mechanism, elastic support between the anchoring plate and the slide cylinder, and the cooperation of the arcuate guide plate and piston cylinder to ensure that the anchoring plate is inserted inside the grouting pipe. The horizontal insertion and slurry discharge of the anchor plate are not hindered and pushed by the slurry.
The smoothness and connection strength of grouting tube insertion are improved, the operation process is simplified, and the effective reinforcement of the drilling side wall is achieved.
Smart Images
Figure CN119163021A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of foundation pit construction, and in particular relates to a deep foundation pit grouting construction device. Background Art
[0002] In the process of deep foundation pit construction, as the excavation depth gradually increases, the waterproof roof becomes thinner and thinner. The stability of the roof becomes worse and worse under the action of the pressure head. Once the bottom of the foundation pit is broken, it will affect the normal construction and even lead to the deterioration of the surrounding environment. In order to ensure the safety of deep foundation pit construction, it is necessary to survey different soil layers and design a pre-grouting reinforcement scheme based on the physical mechanics and related parameters of the pressure water. Grouting anchor rods are a commonly used construction device in the grouting reinforcement scheme.
[0003] In the prior art, a Chinese invention patent document with authorization announcement number CN106193030B discloses a prestressed grouting anchor with a barbed head, which is provided with an anchor claw that can be opened after the anchor rod is inserted into the borehole. The anchor claw can improve the bearing capacity of the anchor rod, making the safety of the foundation pit more guaranteed; wherein the anchor rod in the anchor claw rotates outward and then penetrates into the inner wall of the borehole, and the contact area is large. When the hardness inside the borehole is large, the anchor rod is not easy to penetrate into the inner wall of the borehole; and the anchor claw is arranged on the outside of the anchor rod, which affects the smoothness of the outside of the anchor rod, and will produce a certain resistance to the anchor rod during the process of inserting the anchor rod into the borehole, and even affects the insertion of the anchor rod.
[0004] Therefore, it is necessary to design a deep foundation pit grouting construction device that has little effect on the smoothness of the outer side of the anchor rod, is easy to penetrate into the inner wall of the borehole and grout to form a firm grouting fixed structure to solve the current technical problems. Summary of the invention
[0005] In view of the deficiencies in the prior art, the present invention provides a deep foundation pit grouting construction device which has little effect on the smoothness of the outer side of the anchor rod and is easy to penetrate into the inner wall of the borehole to form a firm grouting fixing structure.
[0006] The technical solution of the present invention is as follows: a deep foundation pit grouting construction device comprises a grouting pipe, wherein a piston cylinder is provided inside the grouting pipe for sliding along its axial direction, the bottom end of the grouting pipe is closed, and a grouting hole group and an anchoring mechanism group are alternately provided on the outer side of the lower section of the grouting pipe, wherein the grouting hole group has grouting holes arranged in a circular array on the side wall of the grouting pipe, and the anchoring mechanism group has an anchoring mechanism arranged in a circular array on the inner side of the grouting pipe; the anchoring mechanism has a cone cylinder, the outer side of the cone cylinder is evenly provided with slurry outlet holes, and the bottom end of the cone cylinder is provided with a A blocking mechanism for closing or opening the slurry outlet hole, wherein the slurry outlet hole is opened when the blocking mechanism abuts against the inner bottom of the grouting pipe; the anchoring mechanism comprises a sliding cylinder fixedly arranged inside the grouting pipe along the radial direction of the grouting pipe, an anchoring plate is slidably arranged inside the sliding cylinder, an end of the anchoring plate facing away from the sliding cylinder is elastically supported by an end of the sliding cylinder close to the anchoring plate, an arc-shaped guide plate matching with the end of the anchoring plate close to the piston cylinder is arranged, and the inner diameter of the arc-shaped guide plate is the same as the outer diameter of the piston cylinder.
[0007] The bottom end of the cone cylinder is provided with an end plate; the blocking mechanism has a closing plug matching the cone cylinder, a gasket corresponding to the slurry outlet hole is sleeved on the outer side of the closing plug, a guide rod is fixedly provided along the axial direction of the bottom end of the closing plug, the guide rod is slidably connected to the end plate, a baffle is fixedly provided at the bottom end of the guide rod, and a support spring is sleeved on the outer side of the guide rod between the baffle and the end plate.
[0008] Slide grooves are provided on both sides of the anchor plate, and retaining springs for elastic support between the anchor plate and the slide cylinder are arranged inside the slide grooves.
[0009] A sliding rod is arranged inside the slide groove, one end of the sliding rod is fixedly connected to one end of the slide groove, a sliding support matching the slide groove is fixedly arranged on the inner side of one end of the slide cylinder close to the anchor plate, the sliding rod is slidably connected to the sliding support, and the retaining spring is sleeved on the outer side of the sliding rod between one end of the slide groove and the sliding support.
[0010] A limiting block having a diameter larger than that of the sliding rod is fixedly arranged on one end of the sliding rod close to the sliding cylinder.
[0011] The end of the limit block away from the slide rod is provided with a cone head.
[0012] A wedge-shaped head is fixedly provided on one end of the anchor plate away from the arc-shaped guide plate.
[0013] Connecting blocks are fixedly arranged on both sides of the slide cylinder. The connecting blocks have arc-shaped surfaces matching the inner sides of the grouting cylinder. The connecting blocks are fixedly connected to the grouting cylinder.
[0014] A sliding ring which is slidably connected to the inner side of the grouting pipe is fixedly arranged on the outer side of the top end of the piston cylinder, and a sliding sealing ring is sleeved on the outer side of the sliding ring.
[0015] A pipe joint is arranged at the top end of the grouting pipe, and a check valve is arranged between the pipe joint and the grouting pipe.
[0016] Beneficial effects of the present invention:
[0017] (1) In the present invention, the anchor plate and the slide tube are elastically supported, so that the anchor plate is kept inside the slide tube and the grouting pipe, which has little effect on the smoothness of the outer side of the grouting pipe and will not cause any obstruction when the grouting pipe is inserted into the borehole;
[0018] (2) When the grouting pipe is inserted into the borehole, slurry with a certain pressure is injected into the grouting pipe, and the slurry pushes the piston cylinder downward. During the downward movement of the grouting pipe, the conical cylinder at the bottom pushes the arc guide plate to move along the radial direction of the grouting pipe, and the anchor plate slides outward along the slide cylinder and is inserted into the side wall of the borehole. The anchor plate is inserted horizontally along the radial direction into the side wall of the borehole, which is conducive to the insertion of the anchor plate, and the anchor plate can be inserted into the side wall of the borehole without additional operation, thereby simplifying the operation process;
[0019] (3) After the bottom end of the piston cylinder abuts against the inner bottom end of the grouting pipe, the arc-shaped guide plate is supported, so that the anchor plate can remain inserted and the connection strength between the grouting pipe and the drilled hole can be improved;
[0020] (4) The blocking mechanism at the bottom end of the piston cylinder abuts against the inner bottom of the grouting pipe, opening the slurry outlet hole on the cone cylinder so that the slurry can be discharged from the grouting hole to achieve grouting reinforcement of the rock mass near the borehole. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is one of the structural schematic diagrams of the deep foundation pit grouting construction device in the present invention.
[0022] Figure 2 This is the second structural schematic diagram of the deep foundation pit grouting construction device in the present invention.
[0023] Figure 3 for Figure 2 Cross-section view at AA in the middle.
[0024] Figure 4 for Figure 3 A partial enlarged view of point B in the middle.
[0025] Figure 5 It is a schematic diagram of the structure of the piston cylinder in the present invention.
[0026] Figure 6 This is one of the structural schematic diagrams of the anchoring mechanism in the present invention.
[0027] Figure 7 This is the second structural schematic diagram of the anchoring mechanism in the present invention.
[0028] Figure 8 for Figure 7 Cross-sectional view at CC. DETAILED DESCRIPTION
[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is not intended to be any limitation on the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values set forth in these embodiments should be interpreted as being merely exemplary and not as limitations.
[0030] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0031] like Figures 1 to 8As shown, a deep foundation pit grouting construction device comprises a grouting pipe 1, wherein a piston cylinder 4 is provided inside the grouting pipe 1 for sliding along its axial direction, the bottom end of the grouting pipe 1 is closed, and a grouting hole group and an anchoring mechanism group are alternately provided on the outer side of the lower section of the grouting pipe 1, wherein the grouting hole group comprises grouting holes 11 arranged on the side wall of the grouting pipe 1 in a circumferential array, and the anchoring mechanism group comprises an anchoring mechanism 2 arranged on the inner side of the grouting pipe 1 in a circumferential array; the anchoring mechanism 2 comprises a cone cylinder 43, wherein grouting holes 49 are evenly provided on the outer side of the cone cylinder 43, and a grouting hole 49 for closing or opening the grouting holes 49 is provided at the bottom end of the cone cylinder 43. 9, when the blocking mechanism abuts against the inner bottom of the grouting pipe 1, the slurry outlet 49 is opened; the anchoring mechanism 2 has a slide cylinder 21 fixedly arranged inside the grouting pipe 1 along the radial direction of the grouting pipe 1, and an anchoring plate 23 is slidably arranged inside the slide cylinder 21, and the end of the anchoring plate 23 away from the slide cylinder 21 is elastically supported by the end of the slide cylinder 21 close to the anchoring plate 23, and the end of the anchoring plate 23 close to the piston cylinder 4 is provided with an arc guide plate 27 matched therewith, and the inner diameter of the arc guide plate 27 is the same as the outer diameter of the piston cylinder 4; in this embodiment, the anchoring plate 23 The elastic support between the slide cylinder 21 keeps the anchor plate 23 inside the slide cylinder 21 and the grouting pipe 1, which has little effect on the smoothness of the outer side of the grouting pipe 1 and does not cause any obstruction when the grouting pipe 1 is inserted into the borehole. When the grouting pipe 1 is inserted into the borehole, slurry with a certain pressure is injected into the grouting pipe 1, and the slurry pushes the piston cylinder 4 downward. During the downward movement of the grouting pipe 1, the cone cylinder 43 at its bottom pushes the arc guide plate 27 to move along the radial direction of the grouting pipe 1, and the anchor plate 23 slides outward along the slide cylinder 21 and is inserted into the side wall of the borehole. 23 is inserted horizontally along the radial direction to the side wall of the borehole, which is conducive to the insertion of the anchor plate 23, and the anchor plate 23 can be inserted into the side wall of the borehole without additional operation, simplifying the operation process; and after insertion, the piston cylinder 4 maintains support for the arc guide plate 27, so that the anchor plate 23 can remain inserted, thereby improving the connection strength between the grouting pipe 1 and the borehole; the blocking mechanism at the bottom end of the piston cylinder 4 is against the inner bottom of the grouting pipe 1, and the slurry outlet hole 49 on the cone cylinder 43 is opened, so that the slurry can be discharged from the grouting hole 11 to the outside, thereby realizing grouting reinforcement of the rock mass near the borehole.
[0032] In some embodiments, the bottom end of the cone 43 has an end plate 47; the blocking mechanism has a closing plug 44 that matches the cone 43, and a gasket 48 corresponding to the pulp outlet hole 49 is sleeved on the outside of the closing plug 44. A guide rod 45 is fixedly provided along the axial direction of the bottom end of the closing plug 44, and the guide rod 45 is slidably connected to the end plate 47. A baffle 46 is fixedly provided at the bottom end of the guide rod 45, and a support spring 46 is sleeved on the outside of the guide rod 45 between the baffle 46 and the end plate 47. The support spring 45 is in the baffle. The disk 46 and the end plate 47 are elastically supported to keep the closing plug 44 in close contact with the inner wall of the cone cylinder 43, and the slurry outlet hole 49 is closed; when the baffle 46 abuts against the inner bottom of the grouting pipe 1, the cone cylinder 43 continues to move downward, and the end plate 47 slides along the guide rod 45 to compress the support spring 46, so that a gap is generated between the closing plug 44 and the inner wall of the cone cylinder 43, through which the slurry can pass, and the slurry inside the piston cylinder 4 can reach the slurry outlet hole 49 and be discharged outward from the slurry outlet hole 49
[0033] In some embodiments, Figure 6 As shown, slide grooves 26 are provided on both sides of the anchor plate 23, and retaining springs 25 for elastic support between the anchor plate 23 and the slide cylinder 21 are provided inside the slide grooves 26. Through the elastic support of the retaining springs 25, when the arc guide plate 27 is not pushed by the piston cylinder 4, the anchor plate 23 can remain retracted into the grouting pipe 1, thereby ensuring the smoothness of the outer side of the grouting pipe 1.
[0034] In some embodiments, Figures 6 to 8 As shown, a slide rod 24 is arranged inside the slide groove 26, and one end of the slide rod 24 is fixedly connected to one end of the slide groove 26, and a sliding support 28 matching the slide groove 26 is fixedly arranged on the inner side of one end of the slide cylinder 21 close to the anchor plate 23, and the slide rod 24 is slidably connected to the sliding support 29, and a retaining spring 25 is sleeved on the outer side of the slide rod 24 between one end of the slide groove 26 and the sliding support 28. Through the elastic support of the retaining spring 25, when the arc guide plate 27 is not pushed by the piston cylinder 4, the anchor plate 23 can remain retracted into the grouting pipe 1 to ensure the smoothness of the outer side of the grouting pipe 1; at the same time, the slide rod 24 is arranged inside the slide groove 26 to cooperate with the sliding support 29 for sliding connection, thereby ensuring the stability of the movement of the anchor plate 23; in addition, when the anchor plate 23 is inserted into the side wall of the borehole, the end of the slide rod 24 is also inserted into the side wall of the borehole to strengthen the strength of the connection with the side wall of the borehole.
[0035] In some embodiments, a limit block 28 having a diameter larger than that of the slide rod 24 is fixedly provided on one end of the slide rod 24 close to the slide cylinder 21. The limit block 28 is fixedly welded to one end of the slide rod 24. The limit block 28 serves to limit the slide rod 24 to prevent the slide rod 24 from slipping off the sliding support 29.
[0036] In some embodiments, the end of the limit block 28 facing away from the slide rod 24 has a cone head 281, and the cone head 281 and the limit block 28 are an integral structure. The cone head 281 can reduce the contact area between the limit block 28 and the inner wall of the borehole to facilitate the insertion of the limit block 28 into the inner wall of the borehole.
[0037] In some embodiments, a wedge head 231 is fixedly provided on the end of the anchor plate 23 facing away from the arc guide plate 27, and the tip of the wedge head 231 can reduce the contact area between the anchor plate 23 and the inner wall of the borehole to facilitate the insertion of the anchor plate 23 into the inner wall of the borehole.
[0038] In some embodiments, connecting blocks 22 are fixedly provided on both sides of the slide cylinder 21. The connecting blocks 22 have an arc-shaped surface matching the inner side of the grouting cylinder 1. The connecting blocks 22 are fixedly connected to the grouting cylinder 1. The connecting blocks 22 are used to reinforce the slide cylinder 21 and improve the connection strength between the slide cylinder 21 and the inner wall of the grouting cylinder 1.
[0039] In some embodiments, a slip ring 41 is fixedly provided on the outer side of the top end of the piston cylinder 4 and is slidably connected to the inner side of the grouting pipe 1 . A sliding sealing ring 42 is sleeved on the outer side of the slip ring 41 . The sliding sealing ring 42 can improve the sealing performance between the slip ring 41 and the grouting pipe 1 .
[0040] In some embodiments, a pipe joint 12 is provided at the top of the grouting pipe 1, and a check valve 3 is provided between the pipe joint 12 and the grouting pipe 1. The check valve 3 is unidirectionally connected from the pipe joint 12 to the grouting pipe 1, which can prevent the slurry from flowing back during grouting and play a role in maintaining pressure.
[0041] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.
[0042] The above-mentioned embodiments only express some implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.
Claims
1. A deep foundation pit grouting construction device, characterized in that: It comprises a grouting pipe, wherein a piston cylinder is slidably arranged inside the grouting pipe along its axial direction, the bottom end of the grouting pipe is closed, and a grouting hole group and an anchoring mechanism group are alternately arranged on the outer side of the lower section of the grouting pipe, the grouting hole group has grouting holes arranged in a circumferential array on the side wall of the grouting pipe, and the anchoring mechanism group has anchoring mechanisms arranged in a circumferential array on the inner side of the grouting pipe; The anchoring mechanism has a cone, and grouting holes are evenly arranged on the outside of the cone. A blocking mechanism for closing or opening the grouting holes is arranged at the bottom of the cone, and the grouting holes are opened when the blocking mechanism abuts against the inner bottom of the grouting pipe. The anchoring mechanism comprises a sliding cylinder fixedly arranged inside the grouting pipe along the radial direction of the grouting pipe, an anchoring plate is slidably arranged inside the sliding cylinder, an end of the anchoring plate facing away from the sliding cylinder is elastically supported by an end of the sliding cylinder close to the anchoring plate, an arc-shaped guide plate matching with the end of the anchoring plate close to the piston cylinder is arranged, and the inner diameter of the arc-shaped guide plate is the same as the outer diameter of the piston cylinder.
2. The deep foundation pit grouting construction device according to claim 1 is characterized in that: The bottom end of the cone cylinder is provided with an end plate; the blocking mechanism has a closing plug matching the cone cylinder, a gasket corresponding to the slurry outlet hole is sleeved on the outer side of the closing plug, a guide rod is fixedly provided along the axial direction of the bottom end of the closing plug, the guide rod is slidably connected to the end plate, a baffle is fixedly provided at the bottom end of the guide rod, and a support spring is sleeved on the outer side of the guide rod between the baffle and the end plate.
3. The deep foundation pit grouting construction device according to claim 1 is characterized in that: Slide grooves are provided on both sides of the anchor plate, and retaining springs for elastic support between the anchor plate and the slide cylinder are arranged inside the slide grooves.
4. The deep foundation pit grouting construction device according to claim 3 is characterized in that: A sliding rod is arranged inside the slide groove, one end of the sliding rod is fixedly connected to one end of the slide groove, a sliding support matching the slide groove is fixedly arranged on the inner side of one end of the slide cylinder close to the anchor plate, the sliding rod is slidably connected to the sliding support, and the retaining spring is sleeved on the outer side of the sliding rod between one end of the slide groove and the sliding support.
5. The deep foundation pit grouting construction device according to claim 3 is characterized in that: A limiting block having a diameter larger than that of the sliding rod is fixedly arranged on one end of the sliding rod close to the sliding cylinder.
6. The deep foundation pit grouting construction device according to claim 5 is characterized in that: The end of the limit block away from the slide rod is provided with a cone head.
7. The deep foundation pit grouting construction device according to claim 1 is characterized in that: A wedge-shaped head is fixedly provided on one end of the anchor plate away from the arc-shaped guide plate.
8. The deep foundation pit grouting construction device according to claim 1 is characterized in that: Connecting blocks are fixedly arranged on both sides of the slide cylinder. The connecting blocks have arc-shaped surfaces matching the inner sides of the grouting cylinder. The connecting blocks are fixedly connected to the grouting cylinder.
9. The deep foundation pit grouting construction device according to claim 1, characterized in that: A sliding ring which is slidably connected to the inner side of the grouting pipe is fixedly arranged on the outer side of the top end of the piston cylinder, and a sliding sealing ring is sleeved on the outer side of the sliding ring.
10. The deep foundation pit grouting construction device according to claim 1, characterized in that: A pipe joint is arranged at the top end of the grouting pipe, and a check valve is arranged between the pipe joint and the grouting pipe.