Waterproof construction structure at pile head of deep foundation pit

Abstract

The utility model discloses a waterproof construction structure at a pile head of a deep foundation pit. The waterproof construction structure comprises a plain soil layer backfilled and tamped on the surface of the deep foundation pit; the concrete cushion layer is formed on the plain soil layer through concrete pouring, and the concrete cushion layer is provided with a vertical wall part; pile heads protrude out of the plain soil layer and the concrete cushion layer; a waterproof layer is laid on the concrete cushion layer. The waterproof layer covers the concrete cushion layer, the vertical wall part and the periphery of the pile head, and a shrinkage layer is arranged on the inner side of the waterproof layer located on the straight edge of the top of the vertical wall part and wraps the straight edge of the top of the vertical wall part. The shrinkage layer is tightly pressed and attached to the vertical wall part through the pre-embedded nails and the thermal shrinkage gaskets, the straight edge of the top of the vertical wall part is wrapped by the shrinkage layer, the waterproof layer is prevented from being scratched when making contact with the straight edge of the top of the vertical wall part, and the problem that the waterproof performance is affected due to the fact that the waterproof coiled material is easily scratched by the right-angle edge of the vertical wall is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of waterproof construction structure at deep foundation pit pile head, belong to foundation pit construction technical field. BACKGROUND

[0002] After pile body is formed in foundation pit construction, the foundation pit surface is backfilled with plain soil, and then a concrete cushion is poured on the plain soil layer. The cushion and the pile head are formed separately, and there are gaps between them, which can easily cause the basement to seep back into the plain soil layer. To prevent backwater in the cushion later, a waterproof layer needs to be laid on the cushion.

[0003] The current technology of laying a waterproof layer on the cushion, as disclosed in Chinese Patent No. CN212129254U, although the waterproof roll can play a waterproof role when directly laid on the concrete cushion, the waterproof roll is easily torn by the right-angle edge of the vertical wall in a right-angle vertical wall environment, affecting the waterproof performance. SUMMARY

[0004] To solve the above technical problems, the utility model provides a waterproof construction structure at the pile head of a deep foundation pit.

[0005] The utility model is achieved by the following technical solutions.

[0006] The utility model provides a waterproof construction structure at the pile head of a deep foundation pit, comprising:

[0007] a plain soil layer on the deep foundation pit surface;

[0008] a concrete cushion formed by pouring concrete on the plain soil layer, the concrete cushion having a vertical wall portion;

[0009] It also includes a pile head that protrudes from the plain soil layer and the concrete cushion; a waterproof layer is laid on the concrete cushion.

[0010] The pile head has a steel reinforcement cage.

[0011] The waterproof layer is a high-molecular self-adhesive film waterproof roll.

[0012] The waterproof layer covers the concrete cushion, the vertical wall portion, and the outer periphery of the pile head. The inside of the waterproof layer at the top straight edge of the vertical wall portion has a shrinkage layer that wraps around the top straight edge of the vertical wall portion.

[0013] The waterproof layer at the outer periphery of the pile head is held tightly by a hoop.

[0014] The shrinkage layer is made of a heat-shrinkable film.

[0015] It also includes a pre-buried nail embedded in the vertical wall portion, with a heat-shrinkable gasket installed on the pre-buried nail. The shrinkage layer is pressed against the vertical wall portion via the heat-shrinkable gasket.

[0016] The utility model discloses beneficial effect lies in: the shrinkage layer is tightly pressed on the vertical wall part through pre -buried nail, heat shrinkage gasket, and the vertical wall part top straight edge place has the shrinkage layer package, avoided waterproof layer and vertical wall part top straight edge contact and be scratched, solved waterproofing membrane and be easily scratched by vertical wall straight angle edge, influence waterproof performance's problem. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the sectional view distribution schematic diagram of the utility model;

[0018] In the drawing: 1 - soil layer;2 - concrete cushion layer;21 - vertical wall part;3 - pile head;31 - reinforcement cage;4 - waterproof layer;5 - shrinkage layer;6 - pre -buried nail;61 - heat shrinkage gasket;7 - hoop. DETAILED DESCRIPTION

[0019] The technical scheme of the utility model is further described below, but the scope of protection is not limited to the description.

[0020] As Figure 1 Indicated.

[0021] The application discloses a kind of waterproof construction structures at pile head of deep foundation pit, comprising:

[0022] Soil layer 1, soil layer 1 is through backfill ram implementation on the surface of deep foundation pit, and there is concrete cushion layer 2 on soil layer 1 by concrete pouring molding, and concrete cushion layer 2 has vertical wall part 21 that stands.

[0023] Still include the pile head 3 with reinforcement cage 31 in inside, and pile head 3 is formed in deep foundation pit and protrudes soil layer 1, concrete cushion layer 2.The concrete cushion layer 2 is laid with waterproof layer 4, and the waterproof layer 4 is high molecular self-adhesive film waterproofing material.

[0024] The waterproof layer 4 covers concrete cushion layer 2, vertical wall part 21 and the outer periphery of pile head 3, and the waterproof layer 4 at the outer periphery of pile head 3 is tightly held by hoop 7, so that the waterproof layer 4 is tightly attached to the outer periphery of pile head 3.

[0025] The inside of the waterproof layer 4 at the top straight edge of vertical wall part 21 has shrinkage layer 5, and the shrinkage layer 5 is composed of heat shrinkage film, the shrinkage layer 5 wraps the top straight edge of vertical wall part 21, and the shrinkage layer 5 also accumulates at the top right angle of vertical wall part 21.

[0026] Still include pre -buried nail 6 pre -buried in vertical wall part 21, and the pre -buried nail 6 is round head nail, and the pre -buried nail 6 is installed with heat shrinkage gasket 61 composed of heat shrinkage plastic, and the shrinkage layer 5 is pressed on vertical wall part 21 through heat shrinkage gasket 61.The shrinkage layer 5 and heat shrinkage gasket 61 are shrunk by hot air gun.

[0027] The shrink layer 5 is tightly attached to the vertical wall part 21 through the pre-embedded nails 6 and the heat-shrunk gaskets 61, and the top straight edge of the vertical wall part 21 is wrapped by the shrink layer 5, so that the waterproof layer 4 is prevented from being scratched by the top straight edge of the vertical wall part 21, and the problem that the waterproof roll is easily scratched by the straight angle edge of the vertical wall and the waterproof performance is affected is solved.

Claims

1. A waterproofing construction structure at a pile head of a deep foundation pit, characterized by, The utility model relates to a deep foundation pit backfilling structure, comprising: a plain soil layer (1) on the surface of a deep foundation pit; a concrete cushion (2) formed by pouring concrete on the plain soil layer (1), the concrete cushion (2) having a vertical wall part (21); a pile head (3) protruding from the plain soil layer (1) and the concrete cushion (2); and 2. The waterproof construction structure at the pile head of a deep foundation pit according to claim 1, characterized in that: a waterproof layer (4) laid on the concrete cushion (2).

3. The waterproof construction structure at the pile head of a deep foundation pit according to claim 1, characterized in that: The pile head (3) has a reinforcing cage (31) therein.

4. The waterproof construction structure at the pile head of a deep foundation pit according to claim 1, characterized in that: The waterproof layer (4) is a polymer self-adhesive waterproof membrane.

5. The waterproof construction structure at the pile head of a deep foundation pit according to claim 4, characterized in that: The waterproof layer (4) covers the concrete cushion (2), the vertical wall part (21) and the outer periphery of the pile head (3), and the inner side of the waterproof layer (4) at the top straight edge of the vertical wall part (21) has a shrinkage layer (5) wrapped around the top straight edge of the vertical wall part (21).

6. The waterproof construction structure at the pile head of a deep foundation pit according to claim 4, characterized in that: The waterproof layer (4) at the outer periphery of the pile head (3) is held by a hoop (7).

7. The waterproof construction structure at the pile head of a deep foundation pit according to claim 4, characterized in that: The shrinkage layer (5) is made of a heat-shrinkable film. The utility model further comprises a pre-buried nail (6) pre-buried in the vertical wall part (21), the pre-buried nail (6) having a heat-shrinkable gasket (61) mounted thereon, and the shrinkage layer (5) being pressed against the vertical wall part (21) via the heat-shrinkable gasket (61).

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