Anchoring rod grouting supporting device for soft soil slope and construction method

Abstract

The application provides a kind of anchor rod grouting support device and construction method for soft soil slope in the technical field of slope protection construction, including outer sleeve, one end of outer sleeve is fixed with cone head, center hole is opened in the center of outer sleeve, inner sleeve is inserted in the center hole, the cross-sectional diameter of center hole is greater than the cross-sectional diameter of inner sleeve, the center of inner sleeve is provided with core hole, the end of inner sleeve towards inside is abutted on cone head;A plurality of grouting branch pipe holes are provided on outer sleeve, which are inclined to extend towards inner sleeve and away from the direction of cone head, grouting branch pipe is provided in grouting branch pipe hole, the end of grouting branch pipe towards inside is provided with supporting ball, grouting hole is opened in supporting ball, which is communicated with grouting branch pipe, arc-shaped groove matched with supporting ball is provided on the outer wall of inner sleeve along the length direction of inner sleeve, grouting hole is also opened in inner sleeve, which is communicated with core hole, grouting hole is communicated with core hole through grouting hole;The slurry diffusion of the application is good, the soil layer reinforcement effect is good, and the safety is high.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of slope protection construction, and particularly relates to an anchor rod grouting support device for soft soil slope. BACKGROUND

[0002] As an important form of geotechnical reinforcement, anchor rod support has been increasingly recognized for its safety, high efficiency and low cost, and has been increasingly applied in the international geotechnical engineering field. However, anchor rod support also has its limitations, mainly in that it is greatly affected by the properties of the soil body, and cannot provide effective uplift resistance when the soil layer is weak. Therefore, the application of this technology is largely limited in high groundwater level and poor soil such as silt soil.

[0003] In the process of anchor rod support, in order to increase the support strength of the anchor rod and reduce the construction cost of the anchor rod, a grouting anchor rod construction process for supporting the slope is often used to replace the support process of the solid anchor rod. This grouting anchor rod construction process for supporting the slope generally consists of a rod body, a tray and a locking nut. When the anchor rod is inserted into the anchor hole, appropriate cement slurry is injected into the gap between the anchor rod and the anchor hole. When the cement slurry solidifies, the anchor rod body and the surrounding rock wall are combined into one, thereby enhancing the support strength of the anchor rod.

[0004] However, in the process of grouting flower pipe anchor rod support of soft soil foundation pit wall such as miscellaneous fill, silt soil, soft clay and sandy soil, the grouting flower pipe anchor rod is prone to deflection or settlement due to the poor properties of the soft soil layer after being inserted into the anchor hole, and the structure of the grouting flower pipe anchor rod in the prior art is usually a pipe body with a grouting hole directly opened thereon, which has the problem of poor diffusion of slurry in the soil layer during grouting, thereby affecting the anchoring effect of the slope. SUMMARY

[0005] In view of the defects in the prior art, the present application aims to solve the problems of poor diffusion of slurry in the soil layer during grouting, poor anchoring effect, and easy deflection or settlement of the anchoring member due to the poor properties of the soft soil layer, which may cause safety accidents. The present application provides an anchor rod grouting support device for soft soil slope, which has good slurry diffusion, good soil reinforcement effect and high safety.

[0006] The object of the present invention is achieved in this way: an anchor grouting support device for soft soil slope, comprising an outer sleeve, one end of the outer sleeve is fixed with a cone head, the center of the outer sleeve is opened with a center hole, the inner sleeve is inserted in the center hole, the cross-sectional diameter of the center hole is larger than the cross-sectional diameter of the inner sleeve, the center of the inner sleeve is provided with a core hole, the inner end of the inner sleeve is abutted against the cone head; the outer sleeve is provided with a plurality of grouting branch pipe holes extending obliquely toward the inner sleeve and away from the direction of the cone head; a grouting branch pipe is provided in the grouting branch pipe hole, the grouting branch pipe is provided in the inner end of the grouting branch pipe is provided with a supporting ball, a grouting hole connected to the grouting branch pipe is opened on the supporting ball, the outer wall of the inner sleeve is provided with an arc groove matching the supporting ball along the length direction of the inner sleeve, and the inner sleeve is also provided with a grouting hole connected to the core hole. When the inner sleeve is rotated, the grouting holes can correspond to the grouting holes one by one, and the grouting holes are connected to the core hole through the grouting holes.

[0007] When the inner sleeve is in use, the position of the inner sleeve is fixed by the outer sleeve, and the inner sleeve is inserted into the center hole. During the insertion process, the arc groove and the supporting ball are aligned to ensure the normal insertion of the inner sleeve. When the inner sleeve is inserted into the cone head of the outer sleeve, the inner sleeve is rotated so that the supporting ball in the arc groove on the inner sleeve is displaced toward the outside of the outer sleeve along the arc wall of the arc groove, forcing the grouting branch pipe to extend out of the grouting branch pipe hole, thereby facilitating the subsequent grouting liquid diffusion and enhancing the gripping force of the outer sleeve and the inner sleeve, avoiding displacement or settlement of the outer sleeve and the inner sleeve before and during the grouting process. When the supporting ball moves out of the arc groove, the inner sleeve is continued to be rotated so that the position of the supporting ball is embedded in the grouting hole, and the grouting hole is connected to the grouting hole. Grouting liquid is injected into the core hole by an external grouting pump. The grouting liquid flows into the grouting branch pipe from the core hole, the grouting hole, and the grouting hole in turn to carry out the grouting operation. When the set time comes, the inner sleeve is rotated in the opposite direction, and the supporting ball returns to the arc-shaped groove, so that the core hole is connected with the center hole through the grouting hole, and grouting is continued. Then the inner sleeve is slowly pulled out several times, and the inner sleeve is slightly rotated to fully fill the gap between the outer sleeve and the inner sleeve, and the grouting construction is completed. Compared with the prior art, the beneficial effect of the present invention is that: the device of the present invention inserts the grouting branch pipe preset in the outer sleeve into the inner sleeve, and rotates the inner sleeve to force the grouting branch pipe to be slightly pushed out from the grouting branch pipe hole, which can not only effectively increase the grip of the outer sleeve on the soil layer and avoid displacement of the inner sleeve and the outer sleeve during the grouting process, but also the grouting liquid diffuses along the grouting branch pipe, and can also diffuse the grouting liquid into the soil layer outside the pushed-out grouting branch pipe, effectively optimizing the diffusion of the grouting liquid, and further enhancing the reinforcement effect on the soil layer, and can be applied to slope protection construction work.

[0008] As a further improvement of the present application, the inner sleeve is further provided with a positioning disc, which can be arranged on the end of the outer sleeve, and the inner sleeve is provided with an extension pipe penetrating the positioning disc upwards, which is communicated with the core hole.

[0009] As a further improvement of the present application, the outer sleeve is provided with a positioning protrusion at the end close to the positioning disc, and the inner wall of the positioning protrusion is just matched with the outer wall of the inner sleeve.

[0010] As a further improvement of the present application, the positioning disc is provided with a limiting protrusion on the side facing the outer sleeve, which can abut against the positioning protrusion.

[0011] As a further improvement of the present application, the grouting branch pipe hole is fixed with a grouting branch pipe through the inclined cable.

[0012] As a further improvement of the present application, the cross-sectional diameter of the positioning protrusion is larger than that of the inner sleeve.

[0013] As a further improvement of the present application, the upper surface of the positioning disc is further provided with an angle line.

[0014] As a further improvement of the present application, the grouting hole is provided with an elastic sealing gasket. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 The device cross-section structure schematic view.

[0016] Fig. 2 For Fig. 2 The local enlarged view of A in the middle.

[0017] Fig. 3 The inner sleeve external structure schematic view.

[0018] Fig. 4 The grouting branch pipe structure schematic view.

[0019] Fig. 5 The structure schematic view of the supporting ball cooperating with the arc-shaped groove in the present application.

[0020] Fig. 6 The structure schematic view of the supporting ball moving out of the arc-shaped groove in the present application.

[0021] In the figure: 1 outer sleeve, 11 grouting branch pipe hole, 12 inclined cable, 13 grouting branch pipe, 14 supporting ball, 15 grouting hole, 16 positioning protrusion, 2 inner sleeve, 21 arc-shaped groove, 22 grouting hole, 23 positioning disc, 24 core hole, 25 limiting protrusion. EMBODIMENT

[0022] The present application will be further described below with reference to the drawings.

[0023] As Figs. 1-6 The utility model provides a kind of anchor rod grouting support device for soft soil slope, including outer sleeve tube 1, one end of outer sleeve tube 1 is fixed with cone head, the center of outer sleeve tube 1 is opened with center hole, inner sleeve tube 2 is inserted in center hole, the cross section diameter of center hole is greater than the cross section diameter of inner sleeve tube 2, ensure that inner sleeve tube 2 has enough rotating distance, the center of inner sleeve tube 2 is equipped with core hole 24, the end of inner sleeve tube 2 towards inside is in contact on cone head;Outer sleeve tube 1 is equipped with several grouting branch pipe holes 11 towards inner sleeve tube 2 and incline extension direction away from the direction where cone head is, grouting branch pipe hole 11 is equipped with grouting branch pipe 13 in, the end of grouting branch pipe 13 towards inside is equipped with jacking ball 14, jacking ball 14 is opened with grouting hole 15 being connected with grouting branch pipe 13, the outer wall of inner sleeve tube 2 is along the length direction of inner sleeve tube 2 and is equipped with the arc groove 21 being matched with jacking ball 14, inner sleeve tube 2 is also opened with grouting hole 22 being connected with core hole 24, grouting hole 22 is equipped with elastic sealing pad (elastic sealing pad is prior art, not drawn in drawing), effectively seal between grouting hole 15 and grouting hole 22 by elastic sealing pad, avoid grouting liquid from the gap between grouting hole 15 and grouting hole 22 overflow, when rotating inner sleeve tube 2, grouting hole 15 can be one-to-one corresponding with grouting hole 22, grouting hole 15 is connected with core hole 24 through grouting hole 22;Inner sleeve tube 2 is also equipped with positioning disc 23, positioning disc 23 can be covered with outer sleeve end, inner sleeve is equipped with extension pipe being upwards and penetrating positioning disc 23, extension pipe is connected with core hole 24;The end of outer sleeve near positioning disc 23 is equipped with positioning protrusion 16, the inner wall of positioning protrusion 16 just and the outer wall of inner sleeve tube 2 are pasted, the effect of positioning protrusion 16 is in limiting the position of inner sleeve tube 2 with positioning disc 23, so that inner sleeve tube 2 is always located on the axis of outer sleeve tube 1, avoid early compression jacking ball 14 to make grouting branch pipe 13 advance and stretch out outer sleeve tube 1 to cause grouting branch pipe 13 damage;The side of positioning disc 23 towards outer sleeve is equipped with limiting protrusion, limiting protrusion can be in close contact with positioning protrusion 16;Grouting branch pipe 13 is fixed with grouting branch pipe hole 11 through diagonal cable 12;The cross section diameter of positioning protrusion 16 is greater than the cross section diameter of inner sleeve tube 2;The upper surface of positioning disc 23 is also equipped with angle line (angle line is prior art, not drawn in drawing), can more accurately determine the rotating angle of inner sleeve tube 2, to realize the accurate cooperation between jacking ball 14, grouting hole 15 and grouting hole 22.

[0024] In order to further carry out the construction method of the present application includes the following steps:

[0025] Step S1, the slope surface of the slope to be supported is leveled, the drilling point is determined and drilling operation is carried out;

[0026] Step S2, the steel mesh is made according to the drilling point, and the drilling position is reserved;

[0027] Step S3, inserting the outer sleeve 1 into the borehole and temporarily blocking the outer sleeve 1 pipe orifice;

[0028] Step S4, laying the steel mesh and preliminary anchoring, and concreting the steel mesh for anchor fixing;

[0029] Step S5, after the anchor concrete is cured, the temporary blockage of the outer sleeve 1 pipe orifice is removed, the inner sleeve 2 is inserted, the arc-shaped groove 21 on the outer wall of the inner sleeve 2 is aligned with the supporting ball 14 inside the outer sleeve 1 during the insertion process, after the insertion is completed, the inner sleeve 2 is rotated, so that the supporting ball 14 moves out of the arc-shaped groove 21, until the supporting ball 14 is embedded in the grouting hole 22, so that the grouting hole 15 is connected with the grouting hole 22;

[0030] Step S6, configuring the grouting liquid, using the grouting pump to pump the grouting liquid into the core hole 24, and the grouting liquid flows into the grouting branch pipe 13 from the core hole 24, the grouting hole 22 and the grouting hole 15 in turn, and the grouting operation is carried out until the set time;

[0031] Step S7, reversely rotating the inner sleeve 2 and returning the supporting ball 14 into the arc-shaped groove 21, so that the core hole 24 is connected with the center hole through the grouting hole 22, the grouting is continued, then the inner sleeve 2 is pulled slowly for several times, the inner sleeve 2 is slightly rotated, the gap between the outer sleeve 1 and the inner sleeve 2 is fully filled, the grouting construction is completed, the inner sleeve 2 is pulled repeatedly for several times, so that the grouting liquid flows slowly in the center hole, thereby filling the possible gap in the grouting process, avoiding the air inclusion mixed into the grouting liquid, so that the grouting liquid can be filled more densely, after the grouting liquid is cured, the inner sleeve 2 and the outer sleeve 1 can be more firmly connected as a whole, the support strength is improved, and the safety hidden danger is reduced.

[0032] When the application is used, the position of the inner sleeve 2 is fixed by the outer sleeve 1, the inner sleeve 2 is inserted into the center hole, the arc-shaped groove 21 is aligned with the supporting ball 14 during the insertion process, the normal insertion of the inner sleeve 2 is ensured, when the inner sleeve 2 is inserted into the taper head of the outer sleeve 1, the supporting ball 14 in the arc-shaped groove 21 on the inner sleeve 2 is displaced along the arc-shaped wall of the arc-shaped groove 21 towards the outside of the outer sleeve 1 by rotating the inner sleeve 2, the grouting branch pipe 13 is forced to break the inclined rope 12 and extend out of the grouting branch pipe hole 11, so that the subsequent grouting liquid diffusion is facilitated and the gripping force of the outer sleeve 1 and the inner sleeve 2 is enhanced, the displacement or settlement of the outer sleeve 1 and the inner sleeve 2 before and during the grouting process is avoided, when the supporting ball 14 moves out of the arc-shaped groove 21, the inner sleeve 2 is continuously rotated, so that the position of the supporting ball 14 is embedded in the grouting hole 22, the grouting hole 15 is connected with the grouting hole 22, the grouting liquid is injected into the core hole 24 by an external grouting pump, the grouting liquid flows into the grouting branch pipe 13 from the core hole 24, the grouting hole 22 and the grouting hole 15 in turn, the grouting operation is carried out to a set time, then the inner sleeve 2 is reversely rotated, the supporting ball 14 returns to the arc-shaped groove 21, the core hole 24 is connected with the center hole through the grouting hole 22, the grouting is continuously carried out, then the inner sleeve 2 is slowly pulled several times, the inner sleeve 2 is slightly rotated, the gap between the outer sleeve 1 and the inner sleeve 2 is fully filled, the grouting construction is completed; compared with the prior art, the beneficial effects of the application are that: the grouting branch pipe 13 is pre-set in the outer sleeve 1, after the inner sleeve 2 is inserted, the inner sleeve 2 is rotated to force the grouting branch pipe 13 to slightly protrude from the grouting branch pipe hole 11, not only the gripping force of the outer sleeve 1 on the soil layer is effectively increased, but also the displacement of the inner sleeve 2 and the outer sleeve 1 during the grouting process is avoided, the grouting liquid diffuses along the grouting branch pipe 13, the grouting liquid can also diffuse into the soil layer outside the protruding grouting branch pipe 13, the diffusion of the grouting liquid is effectively optimized, the reinforcement effect on the soil layer is further strengthened, and the application can be applied to the slope protection construction work.

[0033] The application is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the application, some technical features can be replaced and deformed by those skilled in the art without creative labor, and the replacement and deformation are within the protection scope of the application.

Claims

1. An anchor grouting support device for soft soil slopes, characterized by: The cam is threadably connected to the side of the plunger to allow the plunger to extend out of the reach of the user, and the cam, having a concentric circle around the plunger, has a circumferential surface, and the plunger is configured to extend out of the reach of the user.

2. The anchor grouting support device for soft soil slope according to claim 1, characterized in that: The inner sleeve is further provided with a positioning plate, which can be covered on the end of the outer sleeve. The inner sleeve is provided with an extension tube that passes through the positioning plate upwards, and the extension tube is communicated with the core hole.

3. The anchor grouting support device for soft soil slope according to claim 2, characterized in that: A positioning protrusion is provided at one end of the outer sleeve close to the positioning plate, and the inner wall of the positioning protrusion is just in contact with the outer wall of the inner sleeve.

4. The anchor grouting support device for soft soil slope according to claim 3, characterized in that: A limiting protrusion is provided on one side of the positioning plate facing the outer sleeve, and the limiting protrusion can press against the positioning protrusion.

5. The anchor grouting support device for soft soil slope according to claim 4, characterized in that: A grouting branch pipe is fixed in the grouting branch pipe hole via an oblique rope.

6. The anchor grouting support device for soft soil slope according to claim 5, characterized in that: The cross-sectional diameter of the positioning protrusion is larger than the cross-sectional diameter of the inner sleeve.

7. The anchor grouting support device for soft soil slope according to claim 6, characterized in that: Angle lines are also provided on the upper surface of the positioning plate.

8. The anchor grouting support device for soft soil slope according to claim 7, characterized in that: An elastic sealing pad is arranged in the grouting hole.

9. A construction method for an anchor grouting support device for a soft soil slope according to any one of claims 1 to 8, characterized in that: Step S1, leveling the slope to be supported, determining the drilling points and performing drilling operations; Step S2: making steel mesh according to the drilling points and reserving drilling positions; Step S3: inserting an outer sleeve into the drilled hole and temporarily sealing the outer sleeve opening; Step S4: laying the steel mesh and preliminarily anchoring it, and fixing the steel mesh with concrete spray anchors; Step S5: After the shotcrete has reached strength, the temporary seal at the outer casing opening is removed and the inner casing is inserted. During the insertion process, the arc-shaped groove on the outer wall of the inner casing must be aligned with the supporting ball inside the outer casing. After the insertion is complete, the inner casing is rotated to move the supporting ball out of the arc-shaped groove until the supporting ball is embedded in the grouting hole, thereby connecting the grouting hole with the grouting hole. Step S6: prepare grouting liquid, use a grouting pump to pump the grouting liquid into the core hole, and the grouting liquid flows into the grouting branch pipe from the core hole, grouting hole, and grouting hole in sequence, and the grouting operation is carried out until the set time; Step S7, rotate the inner sleeve in the opposite direction and return the supporting ball to the arc groove, so that the core hole is connected with the center hole through the grouting hole, continue grouting, then slowly pull the inner sleeve several times, and then slightly rotate the inner sleeve to fully fill the gap between the outer sleeve and the inner sleeve, completing the grouting construction.

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