Anchoring and spraying device for serious water seepage area of pile foundation surface of rock confined water stratum

Abstract

The utility model belongs to underground engineering field, especially relate to a kind of anchor spray device for rock confined water stratum pile foundation surface water seepage serious area, including plastic cloth, plastic cloth covers and is fixed on the outer base surface of bored pile, vertical U-shaped water guide groove is fixed on the plastic cloth between bored pile, water guide groove is located on the surface of plastic cloth away from the outer base surface of bored pile, water guide groove bottom end is communicated with bottom water receiving box, and water receiving box is located at the bottom of plastic cloth.The present application adopts plastic cloth to isolate, and effectively dredges water flow by water guide groove, creates dry base surface, to facilitate anchor spray construction, water receiving box is additionally arranged at the bottom of plastic cloth, and water flow is collected and discharged conveniently, to avoid water accumulation in pit bottom.

Description

Technical Field

[0001] This utility model belongs to the field of underground engineering, and specifically relates to an anchor spraying device for areas with severe seepage on the foundation surface of pile foundations in rock confined water strata. Background Technology

[0002] Confined aquifer rock formations refer to water-rich formations within underground rocks. These formations typically require support using cast-in-place piles and high-pressure jet grouting for water cutoff. However, high-pressure jet grouting has poor pile formation efficiency in rock formations, leading to severe seepage at the cast-in-place pile base during excavation. This makes it difficult to implement wire mesh spraying and anchoring, resulting in significant waste of anchoring and spraying materials. Furthermore, severe water seepage can cause the anchoring and spraying layer to collapse, posing a safety risk. Summary of the Invention

[0003] The problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an anchor spraying device for areas with severe seepage on the foundation surface of pile foundations in rock confined water strata.

[0004] This invention is achieved through the following technical solution: An anchor spraying device for areas with severe seepage on the foundation surface of pile foundations in rock confined water formations includes a plastic sheet covering and fixed to the outer foundation surface of the cast-in-place piles. A vertical U-shaped water guide channel is fixed on the plastic sheet between the cast-in-place piles. The water guide channel is located on the surface of the plastic sheet away from the outer foundation surface of the cast-in-place piles. The bottom end of the water guide channel is connected to a horizontal water receiving box, which is fixed to the bottom of the plastic sheet.

[0005] Preferably, the water guide channel is divided into an upper guide channel and a lower guide channel that are slidably connected together. The upper guide channel is fixed on a plastic sheet. Corresponding strip-shaped through holes are provided on the left and right sides of the upper and lower guide channels. Several bolts pass through the strip-shaped through holes. The lower guide channel and the upper guide channel are fixed together by tightening the nuts on the bolts.

[0006] Preferably, the plastic sheet is fixed to the outer base surface of the cast-in-place pile using waterproof cement nails.

[0007] Preferably, the upper guide groove is glued to the plastic sheet.

[0008] Preferably, the width of the water guide channel is equal to the distance between adjacent cast-in-place piles.

[0009] Preferably, the plastic sheet is a polyethylene plastic film with a thickness of 0.05-0.08 mm.

[0010] Preferably, the water receiving box is a U-shaped water receiving box.

[0011] Preferably, the width of the water receiving box is 4-5cm.

[0012] Preferably, the water receiving box is glued to the bottom of the plastic sheet.

[0013] Beneficial effects of this invention: 1. Due to severe water leakage on the pile foundation surface, plastic sheeting was used for isolation, and water flow was effectively diverted through a water guide channel to create a dry foundation surface, which is conducive to anchor spraying construction.

[0014] 2. A water collection box is added to the bottom of the plastic sheet to facilitate water collection and drainage, thus preventing water accumulation at the bottom of the foundation pit.

[0015] 3. The device of this invention avoids the problem of anchor spraying surface becoming damp and collapsing due to water leakage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the construction state structure in this embodiment; Figure 2 This is a schematic diagram of the side structure during construction in this embodiment; Figure 3 This is a schematic diagram of the external base surface structure during construction in this embodiment; Figure 4 This is a schematic diagram of the overall structure of this embodiment.

[0017] In the diagram, 1 is plastic sheeting, 2 is cast-in-place pile, 3 is water guide channel, 4 is water receiving box, 5 is upper guide channel, 6 is lower guide channel, 7 is strip through hole, 8 is bolt, 9 is nut, and 10 is waterproof cement nail. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0019] This embodiment includes a plastic sheet 1, which is covered and fixed to the outer base surface of the cast-in-place pile 2. The outer base surface refers to the side where mesh and shotcrete will be applied. The plastic sheet 1 is used to isolate water flow and create a dry shotcrete surface. Mesh and shotcrete application is then performed on the outer surface of the plastic sheet 1. In this embodiment, the plastic sheet 1 is a polyethylene plastic film with a thickness between 0.05-0.08 mm. The plastic sheet 1 is fixed to the outer base surface of the cast-in-place pile 2 using waterproof cement nails 10.

[0020] A vertical U-shaped water guide channel 3 is fixed on the plastic sheet 1 between adjacent cast-in-place piles 2. The water guide channel 3 is located on the inner surface of the plastic sheet 1, that is, on the surface away from the outer base surface of the cast-in-place pile 2. The water guide channel 3 is used to guide the water coming down from the cast-in-place pile 2. Preferably, the width of the water guide channel 3 is equal to the distance between adjacent cast-in-place piles 2. The bottom end of the water guide channel 3 is connected to a horizontal water receiving box 4. The water receiving box 4 is fixed to the bottom of the plastic sheet 1 with glue. The water receiving box 4 is located between the outer base surface of the cast-in-place pile 2 and the inner surface of the plastic sheet 1. The water flowing down from the water guide channel 3 flows into the water receiving box 4, is collected by the water receiving box 4, and is discharged uniformly to avoid water accumulation at the bottom of the foundation pit. Preferably, the water receiving box 4 is a U-shaped water receiving box with a width between 4-5 cm.

[0021] To accommodate different heights of the cast-in-place pile 2 with mesh and anchor spraying, it is preferable that the length of the water guide channel 3 is adjustable. Specifically, in this embodiment, the water guide channel 3 is divided into an upper guide channel 5 and a lower guide channel 6 that are slidably connected together. The lower guide channel 6 can slide up and down in the upper guide channel 5. The upper guide channel 5 can be glued to the plastic sheet 1. Corresponding strip-shaped through holes 7 are provided on the left and right sides of the upper guide channel 5 and the lower guide channel 6. Several bolts 8 pass through the strip-shaped through holes 7. Nuts 9 are provided on the bolts 8. By tightening the nuts 9 on the bolts 8, the lower guide channel 6 and the upper guide channel 5 can be fixed together, thereby fixing the length of the water guide channel 3.

[0022] During construction, an excavator was used to clean the base surface of the cast-in-place pile 2 during the excavation of the foundation pit. Due to severe water seepage on the pile base surface, direct mesh installation and shotcreting could not be achieved. First, the lower guide channel 6 was stretched downwards to adjust the total length of the water guide channel 3, and the nut 9 was tightened to fix the lower guide channel 6. A water collection box 4 was fixed at the bottom of the water guide channel 3 and glued to the bottom of the plastic sheet 1. This allows the water guide channel 3 to divert water into the water collection box 4 for unified drainage. Then, waterproof cement nails 10 were used to fix the plastic sheet 1 to the cast-in-place pile 2. Finally, steel mesh was fixed on the outer surface of the plastic sheet 1, and shotcreting was carried out. Because the water collection box 4 at the bottom is located between the outer base surface of the cast-in-place pile 2 and the inner surface of the plastic sheet 1, the plastic sheet 1 will have a small angle with the cast-in-place pile 2 when laid, and there will be a small bulge at the bottom of the plastic sheet 1. However, this bulge is easily leveled during the later shotcreting and will not affect the normal construction process. 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; those skilled in the art should understand that modifications can still be made to the technical solutions described in the above embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A shotcrete device for use in areas with severe seepage at the foundation surface of pile foundations in confined rock formations, characterized in that: Includes a plastic sheet (1), which is fixed to the outer base surface of the cast-in-place pile (2). A vertical U-shaped water guide channel (3) is fixed on the plastic sheet (1) between the cast-in-place piles (2). The water guide channel (3) is located on the surface of the plastic sheet (1) away from the outer base surface of the cast-in-place pile (2). The bottom end of the water guide channel (3) is connected to a horizontal water receiving box (4). The water receiving box (4) is fixed to the bottom of the plastic sheet (1).

2. The anchor-spraying device for severely seepage areas of pile foundation surfaces in confined rock aquifers according to claim 1, characterized in that: The water guide channel (3) is divided into an upper guide channel (5) and a lower guide channel (6) that are slidably connected together. The upper guide channel (5) is fixed on the plastic cloth (1). The upper guide channel (5) and the lower guide channel (6) are provided with corresponding strip-shaped through holes (7) on their left and right sides. Several bolts (8) pass through the strip-shaped through holes (7). The lower guide channel (6) and the upper guide channel (5) are fixed together by tightening the nuts (9) on the bolts (8).

3. The anchor-spraying device for severely seepage areas of pile foundation surfaces in confined rock aquifers as described in claim 1 or 2, characterized in that: The plastic sheet (1) is fixed to the outer base surface of the cast-in-place pile (2) by waterproof cement nails (10).

4. The anchor-spraying device for severely seepage areas of pile foundation surfaces in confined rock aquifers according to claim 2, characterized in that: The upper guide groove (5) is glued to the plastic sheet (1).

5. The anchor-spraying device for severely seepage areas of pile foundation surfaces in confined rock aquifers according to claim 1, characterized in that: The width of the water guide channel (3) is equal to the distance between adjacent cast-in-place piles (2).

6. The anchor-spraying device for severely seepage areas of pile foundation surfaces in confined rock aquifers according to claim 1 or 2, characterized in that: The plastic sheet (1) is a polyethylene plastic film with a thickness of 0.05-0.08 mm.

7. The anchor-spraying device for severely seepage areas of pile foundation surfaces in confined rock aquifers according to claim 1 or 2, characterized in that: The water receiving box (4) is a U-shaped water receiving box.

8. The anchor-spraying device for severely seepage areas of pile foundation surfaces in confined rock aquifers according to claim 1 or 2, characterized in that: The width of the water receiving box (4) is 4-5cm.

9. The anchor-spraying device for severely seepage areas of pile foundation surfaces in confined rock aquifers according to claim 1 or 2, characterized in that: The water receiving box (4) is glued to the bottom of the plastic sheet (1).

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