Slurry conveying pipe used for lowering rib body first and then conducting high-pressure grouting
By designing a slurry pipe for anti-floating anchor construction, the problem of the tendon being easily extruded during high-pressure grouting is solved, and the uniform distribution and effect of the grouting body is achieved, ensuring that the verticality of the steel bar body is not damaged.
Patent Information
- Application Number
- CN202421443250.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-06-24
AI Technical Summary
In the construction of anti-floating anchors, the reinforcement body is easily squeezed into the hole wall by high-pressure spraying cement slurry, resulting in poor grouting body effect.
A slurry pipe for lowering the rib body first and then high-pressure grouting is designed, including a slurry inner pipe, a slurry outer pipe and a slurry nozzle. The slurry inner pipe is fixed inside the slurry outer pipe through a fixing group to provide a slurry placement channel to avoid extrusion of the high-pressure grouting body.
It effectively prevents the steel bar rod body from tilting due to the extrusion of the high-pressure grout during the grouting process, maintains the vertical position of the reinforcement body, ensures the uniform distribution and effect of the grouting body, and does not affect the high-pressure rotary spray grouting operation.
Smart Images
Figure CN222990730U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of anti - floating anchor construction, in particular to a slurry conveying pipe for first placing the reinforcement body and then performing high - pressure grouting. Background Technique
[0002] The anti - floating anchor is a common anti - floating measure for basements. Its traditional construction method is as follows: anchor rod positioning → drill positioning → pipe - following hole formation → hole cleaning while manufacturing the rod body and grouting pipe → installing the rod body (grouting pipe) → filling with pea gravel → pulling out the pipe - following pipe → hole - mouth sealing → grouting (secondary grouting) → curing → anti - pull detection. After grouting, the diameter D of the anchor solid is generally the same as the diameter of the pilot hole, 150 - 200mm. The strength of the cement slurry is M30, the water - cement ratio of the slurry is 0.45 - 0.5, and the grouting pressure is 0.5 - 1.0MPa. The grouting sleeve uses a PE pipe with a diameter of 20mm. After the slurry overflows from the hole mouth, the grouting pipe is slowly lifted, and then the slurry is repeatedly replenished.
[0003] During the grouting process, the inner pipe and the outer pipe of the traditional slurry conveying pipe and the nozzle are respectively the slurry conveying and air conveying channels. The reinforcement body is first placed into the hole, and the nozzle rotates and lifts upward from the bottom of the hole. Since multi - layer pure basements are becoming more and more widespread now, the water head pressure becomes higher, and the anti - floating requirements are getting higher. The reinforcement body (anchor rod) is easily squeezed against the hole wall by the high - pressure sprayed cement slurry, and the high - pressure rotary jet grouting in the area blocked by the reinforcement body is difficult to spread over, resulting in a poor effect of the grouting body. Content of the Utility Model
[0004] Aiming at the deficiencies in the prior art, the utility model provides a slurry conveying pipe for first placing the reinforcement body and then performing high - pressure grouting, which solves the problem that in the prior art, the reinforcement body (anchor rod) is easily squeezed against the hole wall by the high - pressure sprayed cement slurry, and the high - pressure rotary jet grouting in the area blocked by the reinforcement body is difficult to spread over.
[0005] According to an embodiment of the utility model, a slurry conveying pipe for first placing the reinforcement body and then performing high - pressure grouting includes: a slurry conveying inner pipe, a slurry conveying outer pipe, and a slurry conveying nozzle. The slurry conveying inner pipe is fixed inside the slurry conveying outer pipe through a fixing group, and the slurry conveying outer pipe and the slurry conveying inner pipe are coaxially arranged. The inside of the slurry conveying inner pipe is a placement channel for the reinforcement body, the inside of the slurry conveying outer pipe is a slurry conveying channel, and the slurry conveying nozzle is detachably connected to the end of the slurry conveying outer pipe.
[0006] Compared with the prior art, the utility model has the following beneficial effects: This slurry conveying pipeline is divided into a slurry conveying inner pipe, a slurry conveying outer pipe, and a slurry conveying nozzle. The slurry conveying inner pipe and the slurry conveying outer pipe are respectively used for placing the steel bar rod body and the slurry conveying channel. The steel bar rod body is protected by the slurry conveying inner pipe, preventing it from being squeezed by the high - pressure slurry during the grouting process, resulting in the steel bar rod body being inclined. The steel bar rod body can always remain centered in the placement channel for the reinforcement body, and it does not affect the high - pressure rotary jet grouting operation. The effect of the grouting body is good, and the steel bar rod body is vertical and not damaged.
[0007] Further, the fixing component includes: a plurality of first centering fasteners respectively arranged on the side walls at both ends of the inner slurry conveying pipe, and a first fixing stopper fixed on the inner wall of the slurry conveying channel. Each first centering fastener is in close contact with the inner wall of the slurry conveying channel, and one of the first centering fasteners is detachably connected to the first fixing stopper.
[0008] Further, the nozzle includes: a connecting pipe and an installation pipe arranged coaxially. A second centering fastener is arranged on the side wall of the connecting pipe, and the second centering fastener is in close contact with the inner wall of the connecting pipe. A second fixing block is arranged on the inner wall of the connecting pipe, and one of the second centering fasteners is detachably connected to the second fixing block; wherein, the connecting pipe is detachably connected to the outer slurry conveying pipe, a plugging step for inserting the inner slurry conveying pipe is formed at the top of the installation pipe, and a plurality of nozzles are arranged on the side wall of the connecting pipe.
[0009] Further, an external thread is arranged at the bottom end of the outer slurry conveying pipe, and an internal thread is arranged at the top of the connecting pipe. The outer slurry conveying pipe is threadedly connected to the connecting pipe. Description of the Drawings
[0010] Figure 1 is a schematic structural diagram of the grouting pipeline of the present utility model.
[0011] Figure 2 For the present utility model Figure 1 is a sectional view taken along line A-A in the present utility model.
[0012] Figure 3 For the present utility model Figure 1 is a sectional view taken along line B-B in the present utility model.
[0013] Figure 4 is a schematic structural diagram of the nozzle.
[0014] In the above-mentioned drawings: 1. Outer slurry conveying pipe; 2. Inner slurry conveying pipe; 3. Reinforcement body placement channel; 4. Slurry conveying channel; 5. First centering fastener; 6. First fixing stopper; 7. Connecting pipe; 8. Installation pipe; 9. Second fixing block; 10. Second centering fastener; 11. Plugging step; 12. Nozzle. Detailed Embodiments
[0015] The technical solutions in the present utility model will be further described below with reference to the drawings and embodiments.
[0016] As Figure 1 shown, an embodiment of the present utility model provides a slurry conveying pipe for first placing the reinforcement body and then performing high-pressure grouting, including: an inner slurry conveying pipe 2, an outer slurry conveying pipe 1, and a slurry conveying nozzle. The inner slurry conveying pipe 2 is fixed inside the outer slurry conveying pipe 1 through a fixing group, and the outer slurry conveying pipe 1 and the inner slurry conveying pipe 2 are coaxially arranged. The inside of the inner slurry conveying pipe 2 is a reinforcement body placement channel 3, the inside of the outer slurry conveying pipe 1 is a slurry conveying channel 4, and the slurry conveying nozzle is detachably connected to the end of the outer slurry conveying pipe 1.
[0017] This grout delivery pipeline is divided into an inner grout delivery pipe 2, an outer grout delivery pipe 1, and a grout delivery nozzle. The inner grout delivery pipe 2 and the outer grout delivery pipe 1 are respectively used for placing the steel bar rod body and the grout delivery channel 4. The steel bar rod body is protected by the inner grout delivery pipe 2 to prevent it from tilting due to the extrusion of high-pressure grout during the grouting process, so that the steel bar rod body can always remain centered in the rib body placement channel 3 without affecting the high-pressure jet grouting operation. The grouting body has a good effect, and the steel bar rod body is vertical and not damaged.
[0018] As Figure 1 and Figure 2 shown, the fixing assembly includes: a plurality of first centering fasteners 5 respectively arranged on the side walls at both ends of the inner grout delivery pipe 2 and a first fixing stopper 6 fixed on the inner wall of the grout delivery channel 4. Each first centering fastener 5 is in close contact with the inner wall of the grout delivery channel 4, and one of the first centering fasteners 5 is detachably connected to the first fixing stopper 6.
[0019] As Figure 3 shown, the nozzle includes: a connecting pipe 7 and an installation pipe 8 arranged coaxially. The side wall of the connecting pipe 7 is provided with a second centering fastener 10, and the second centering fastener 10 is in close contact with the inner wall of the connecting pipe 7. The inner wall of the connecting pipe 7 is provided with a second fixing block 9, and one of the second centering fasteners 10 is detachably connected to the second fixing block 9; wherein, the connecting pipe 7 is detachably connected to the outer grout delivery pipe 1, the top of the installation pipe 8 forms a plug-in step 11 for the inner grout delivery pipe 2 to insert into, and the side wall of the connecting pipe 7 is provided with a plurality of nozzles 12. Further, the bottom end of the outer grout delivery pipe 1 is provided with an external thread, the top of the connecting pipe 7 is provided with an internal thread, and the outer grout delivery pipe 1 is threadedly connected to the connecting pipe 7.
[0020] Specifically, the first centering fastener 5 and the first fixing stopper 6, and the second centering fastener 10 and the second fixing block 9 are all connected by screws for the detachable connection of this grout delivery pipeline.
[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.
Claims
1. A grouting pipe for first placing reinforcement and then high-pressure grouting, characterized in that: include: An inner slurry delivery tube (2), an outer slurry delivery tube (1), and a slurry delivery nozzle, wherein the inner slurry delivery tube (2) is fixed inside the outer slurry delivery tube (1) via a fixing assembly, and the outer slurry delivery tube (1) and the inner slurry delivery tube (2) are coaxially arranged, the inner slurry delivery tube (2) has a tendon placement channel (3), the inner slurry delivery tube (1) has a slurry delivery channel (4), and the slurry delivery nozzle is detachably connected to the end of the outer slurry delivery tube (1).
2. A grouting pipe for first placing reinforcement and then high-pressure grouting as claimed in claim 1, characterized in that: The fixing assembly comprises: a plurality of first center fasteners (5) respectively arranged on the side walls at both ends of the slurry delivery inner tube (2) and a first fixed stopper (6) fixed on the inner wall of the slurry delivery channel (4); each first center fastener (5) is tightly attached to the inner wall of the slurry delivery channel (4), and one of the first center fasteners (5) is detachably connected to the first fixed stopper (6).
3. A grouting pipe for first placing reinforcement and then high-pressure grouting as claimed in claim 1, characterized in that: The nozzle comprises: a coaxially arranged connecting pipe (7) and a mounting pipe (8); a second central fastener (10) is arranged on the side wall of the connecting pipe (7), and the second central fastener (10) is in close contact with the inner wall of the connecting pipe (7); a second fixed stopper (9) is arranged on the inner wall of the connecting pipe (7); one of the second central fasteners (10) and the second fixed stopper (9) are detachably connected; The connecting pipe (7) is detachably connected to the slurry conveying outer pipe (1), the top of the mounting pipe (8) forms a plug-in step (11) for the slurry conveying inner pipe (2) to be inserted, and the side wall of the connecting pipe (7) is provided with a plurality of nozzles (12).
4. A grouting pipe for first placing reinforcement and then high-pressure grouting as claimed in claim 3, characterized in that: The bottom end of the slurry conveying outer pipe (1) is provided with an external thread, the top of the connecting pipe (7) is provided with an internal thread, and the slurry conveying outer pipe (1) is threadedly connected to the connecting pipe (7).