CN216586689U

CN216586689U - Waterproof structure of concave pile head

Info

Publication number: CN216586689U
Application number: CN202123300754.3U
Authority: CN
Inventors: 胡颖欣; 宋桃; 沈志强
Original assignee: Shenzhen Keshun Waterproof Engineering Co ltd
Current assignee: Shenzhen Keshun Waterproof Engineering Co ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-05-24
Anticipated expiration: 2031-12-24

Abstract

The utility model relates to a basement waterproof field specifically discloses a waterproof construction of recessed pile head. The waterproof structure comprises a pile head, a cushion layer and a waterproof coiled material on the upper surface of the cushion layer; the pile head penetrates through the cushion layer, and a lower concave part is arranged at the position of the cushion layer surrounding the pile head. The waterproof layer is arranged on the first waterproof layer; the first waterproof layer completely covers the surface of the pile head and the surface of the lower concave part; the waterproof coiled material is paved to the upper edge of the lower concave part of the cushion layer; the first sealing wrapping edge completely covers the junction of the waterproof roll and the first waterproof layer. The waterproof roll is used for solving the problem that the waterproof roll around the concave pile head is easy to break, eliminating potential permeation hidden danger and further improving the waterproof treatment effect of the concave pile head.

Description

Waterproof structure of concave pile head

Technical Field

The utility model relates to a basement waterproof field, more specifically relates to a waterproof construction of recessed pile head.

Background

New buildings in large and medium cities in China are developed to high floors and underground, and underground buildings comprise underground rails, underground shopping malls, underground garages, underground pedestrian passageways, underground transformer substations, underground pipelines and the like. These underground works have high requirements for water resistance to ensure their function and life. Especially, the underground engineering in coastal area city has poor engineering geological and hydrogeological conditions, and the underground engineering structure is in underground water all the year round. Therefore, the waterproof design and construction of underground engineering are made, the quality of the underground engineering is ensured, and the underground engineering is very important to be impermeable. The waterproof treatment of the pile head is a difficult point of underground waterproof construction and is a key factor influencing the quality of underground waterproof project. If the waterproof treatment is not well done, once leakage occurs, reworking and maintenance are needed, and the construction period is delayed.

At present, polymer pre-paved waterproof coiled materials are applied to more and more waterproof constructions of underground bottom plates. When the polymer pre-paved waterproof coiled material is constructed on the underground bottom plate, the polymer pre-paved waterproof coiled material is paved with the cushion layer in an empty way and is fully adhered with the bottom plate structure, so that the waterproof coiled material is prevented from being pulled and cracked due to low strength of the cushion layer, and a water channeling channel is also prevented from being formed between the waterproof layer and the bottom plate. One common underground pile head at present is a recessed pile head. The cushion layer around the concave pile head is downwards provided with a groove with a certain width. If direct waterproof construction according to current pile head, adopt the polymer waterproofing membrane of spreading in advance promptly and extend to pile head edge, because waterproofing membrane is harder, stress concentration appears in the turn position of bed course recess easily, and then leads to waterproofing membrane fracture, causes the seepage hidden danger in pile head position.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming at least one of the not enough of above-mentioned prior art, provide a waterproof construction of recessed pile head for solve the peripheral waterproofing membrane of recessed pile head cracked problem appears easily, eliminate latent infiltration hidden danger, and then promote the water-proof treatment effect of recessed pile head.

The utility model adopts the technical proposal that the waterproof structure of the concave pile head comprises a pile head, a cushion layer and a waterproof coiled material on the upper surface of the cushion layer; the pile head penetrates through the cushion layer, and a lower concave part is arranged at the position of the cushion layer surrounding the pile head. The waterproof layer is arranged on the first waterproof layer; the first waterproof layer completely covers the surface of the pile head and the surface of the lower concave part; the waterproof coiled material is paved to the upper edge of the lower concave part of the cushion layer; the first sealing wrapping edge completely covers the junction of the waterproof roll and the first waterproof layer.

The scheme belongs to a part of a waterproof structure of an underground building bottom plate. The construction process of the building bottom plate comprises the steps of constructing a cushion layer on the ground, laying a waterproof coiled material on the cushion layer, and pouring the bottom plate. When the bedding course is constructed, grooves with certain width, namely, concave parts, are downwards formed on the bedding course around the pile head to form the so-called concave pile head. In the waterproof treatment of the pile head, the concave part of the cushion layer is provided with a turning surface, so that harder waterproof coiled materials are not suitable, and softer waterproof coating materials are adopted. The waterproof coiled material is only paved to the upper edge of the lower concave part of the cushion layer so as to avoid the surface of the lower concave part; the waterproof roll is completely laid between the cushion layer and the bottom plate without any bending; the surface of the lower concave part and the surface of the pile head exposed out of the cushion layer are changed into waterproof paint serving as a first waterproof layer, and the waterproof paint can easily, completely and continuously cover the surface of the lower concave part and the surface of the pile head exposed out of the cushion layer. Of course the first waterproof layer may also be a waterproof preform or a waterproof film covering the surface of the undercut and the surface of the pile head. According to the scheme, the waterproof work of the waterproof roll material at the pile head position is shared by the first waterproof layer, so that the problem that the waterproof roll material is easy to break at the lower concave part due to bending is solved; on the other hand, by means of the excellent bending resistance and the excellent compression resistance of the first waterproof layer, the problem that the waterproof structure of the pile head is easy to crack due to displacement and settlement is solved; thereby comprehensively eliminating potential infiltration hidden danger of the concave pile head and improving the waterproof treatment effect of the concave pile head. In addition, the first sealing edge is arranged at the junction of the waterproof roll and the first waterproof layer, namely the upper edge of the lower concave part of the cushion layer, so that the connecting gap is eliminated, and a continuous and complete waterproof barrier between the cushion layer and the bottom plate is formed.

Preferably, the first waterproof layer extends continuously from a side surface of the depressed part of the mat layer to an upper surface of the mat layer. The first waterproof layer extends to the upper surface of the cushion layer from the lower concave part and then is overlapped with the waterproof roll material by a certain width. Waterproofing membrane stack is in the top of first waterproof layer to improve the waterproof processing reliability of the junction of first waterproof layer and waterproofing membrane.

Further, the waterproof roll and the first waterproof layer have an overlapping range of 200mm to 300mm in width.

And the waterproof structure further comprises a second waterproof layer, and the second waterproof layer completely covers the surface of the first waterproof layer. The second waterproof layer has the same coverage area as the first waterproof layer. The second waterproof layer and the first waterproof layer are complementary in material characteristics, and the waterproof treatment effect of the covered surface is further improved.

Preferably, the waterproof roll is adhered to the upper edge of the lower concave part of the cushion layer through double-sided adhesive tape. The waterproof roll is generally made of HDPE (high-density polyethylene) sheets or TPO (thermoplastic polyolefin) sheets, the thickness of each sheet is not less than 0.7mm, the sheets are all plastic materials, and the hardness is high. And the waterproof coiled material is laid in a vacant way with a lower cushion layer without bonding in the laying process in order to form tight bonding with a bottom plate poured later. The edge position of the waterproof roll, namely the waterproof roll at the upper edge of the lower concave part, is easy to be warped due to the construction mode, so that the waterproof roll is fixed below the edge position by the double-sided adhesive tape. When the double-sided tape is adhered, one side of the double-sided tape is aligned with the upper edge of the lower recess.

Further, the width of the double-sided adhesive tape is larger than 70 mm.

Preferably, the first sealing edge is sealing paste and/or waterproof mortar. When the first sealing edge is coated, the first sealing edge is compact, continuous, full and firm in bonding. When the first sealing edge is subjected to dual treatment of sealing paste and waterproof mortar, the waterproof mortar is firstly coated, the edge position of the waterproof coiled material is compacted, and then the sealing paste is coated.

Preferably, a second sealing edge is arranged at the intersection of the pile head and the lower concave part of the cushion layer. The second sealing edge surrounds the pile head for a circle. The second sealing edge can block the gap between the pile head and the cushion layer, which is generated by relative displacement, and the leakage of the waterproof structure is avoided. The second sealing edge may be the same as the first sealing edge, using a sealant and/or a waterproof mortar.

Preferably, the root of the steel bar extending out of the pile head is provided with a water stop strip or water stop glue. The water stop strip is a water stop strip capable of expanding when meeting water and has slow expansion performance. The water stop strip is closely attached to the root of the steel bar and the seam base surface of the pile head, and the phenomena of hollowing, separation and the like cannot occur in the middle. The water stop bar is firmly installed in the seam base surface or the reserved groove of the pile head. When the water stopping strips are in lap joint, the lap joint width is not less than 30 mm.

Preferably, the first waterproof layer is a cement-based capillary crystalline waterproof coating, and the second waterproof layer is a back hydraulic waterproof coating.

Compared with the prior art, the beneficial effects of the utility model are that:

according to the scheme, the waterproof work of the waterproof roll material at the pile head position is shared by the first waterproof layer, so that the problem that the waterproof roll material is easy to break at the lower concave part due to bending is solved; on the other hand, by means of the excellent bending resistance and the excellent compression resistance of the first waterproof layer, the problem that the waterproof structure of the pile head is easy to crack due to displacement and settlement is solved; thereby comprehensively eliminating potential infiltration hidden danger of the concave pile head and improving the waterproof treatment effect of the concave pile head.

Drawings

Fig. 1 is a structural diagram of embodiment 1 of the present invention.

Description of reference numerals: the waterproof structure comprises a pile head 1, a cushion layer 2, a waterproof coiled material 3, a bottom plate 4, a concave part 5, a first waterproof layer 11, a second waterproof layer 12, a first sealing edge 13, a second sealing edge 14, a double-sided adhesive tape 15 and a water stop strip 16.

Detailed Description

The drawings of the present invention are for illustration purposes only and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

As shown in fig. 1, the embodiment is a waterproof structure of a recessed pile head, and includes a pile head 1, a cushion layer 2, and a waterproof roll 3 on the upper surface of the cushion layer 2; the pile head 1 penetrates through the cushion layer 2, and a lower concave part 5 is arranged at the position of the cushion layer 2 surrounding the pile head 1. The waterproof sealing material also comprises a first waterproof layer 11 and a first sealing edge-covering 13; the first waterproof layer 11 completely covers the surface of the pile head 1 and the surface of the lower concave part 5; the waterproof coiled material 3 is paved to the upper edge of the lower concave part 5 of the cushion layer 2; the first sealing edge 13 completely covers the junction between the waterproof roll 3 and the first waterproof layer 11.

The scheme belongs to a part of a waterproof structure of an underground building bottom plate. The construction process of the building bottom plate comprises the steps of constructing the cushion layer 2 on the ground, laying the waterproof coiled material 3 on the cushion layer, and pouring the bottom plate 4. When the cushion layer 2 is constructed, the cushion layer 2 around the pile head 1 is downwards provided with a groove with a certain width, namely a lower concave part 5, so that a so-called concave pile head is formed. In the waterproof treatment of the pile head 1, the lower concave part 5 of the cushion layer 2 is provided with a turning surface, so that a harder waterproof coiled material 3 is not suitable, and a softer waterproof coating is adopted. The waterproof roll 3 is only laid to the upper edge of the lower concave part 5 of the cushion layer 2 to avoid the surface of the lower concave part 5; the waterproof roll 3 is completely laid between the cushion layer 2 and the bottom plate 4 without any bending; the surface of the concave part 5 and the surface of the pile head 1 exposed out of the cushion layer are changed into waterproof paint as a first waterproof layer 11, and the waterproof paint can easily, completely and continuously cover the surfaces of the concave part and the pile head. Of course the first waterproof layer 11 may also be a waterproof preform or a waterproof film covering the surface of the undercut 5 and the surface of the pile head 1. According to the scheme, the waterproof work of the waterproof coiled material 3 at the position of the pile head 1 is shared by the first waterproof layer 11, so that the problem that the waterproof coiled material 3 is easy to break at the lower concave part 5 due to bending is solved; on the other hand, by means of the excellent bending resistance and the excellent compression resistance of the first waterproof layer 11, the problem that the waterproof structure of the pile head is easy to crack due to displacement and settlement is solved; thereby comprehensively eliminating potential infiltration hidden danger of the concave pile head and improving the waterproof treatment effect of the concave pile head. In addition, a first sealing edge 13 is arranged at the junction of the waterproof roll 3 and the first waterproof layer 11 to eliminate a connecting gap, so that a continuous and complete waterproof barrier between the cushion layer 2 and the bottom plate 4 is formed. In this embodiment, bed course 2 is the concrete bed course, and waterproofing membrane 3 is that the polymer spreads waterproofing membrane in advance, and bottom plate 4 is waterproof reinforced concrete bottom plate.

Preferably, the first waterproof layer 11 extends continuously from the side surface of the lower recess 5 of the pad layer 2 to the upper surface of the pad layer 2. The first waterproof layer 11 extends from the lower concave portion 5 to the upper surface of the cushion layer 2, and then overlaps with the waterproof roll 3 by a certain width. The waterproofing membrane 3 is superposed over the first waterproof layer 11 to improve the waterproofing reliability at the joint of the first waterproof layer 11 and the waterproofing membrane 3.

Further, the waterproof roll 3 and the first waterproof layer 11 have an overlapping range of a width of 200mm to 300 mm.

Further, the waterproof structure further comprises a second waterproof layer 12, and the second waterproof layer 12 completely covers the surface of the first waterproof layer 11. The second waterproof layer 12 has the same covering area as the first waterproof layer 11. The second waterproof layer 12 is complementary to the first waterproof layer 11 in terms of material properties, and further improves the waterproof treatment effect of the covered surface thereof.

Preferably, a double-sided tape 15 is further included, and the waterproof roll 3 is stuck to the upper edge of the lower concave portion 5 of the cushion layer 2 by the double-sided tape 15. The waterproof roll 3 is made of HDPE sheet or TPO sheet generally, the thickness of the sheet is not less than 0.7mm, the sheet belongs to plastic materials, and the hardness is high. And the waterproof coiled material 3 is laid in a vacant way without being bonded with the lower cushion layer 2 in the laying process in order to form tight bonding with the bottom plate 4 poured later. The above-described construction easily causes the edge position of the waterproofing membrane 3, that is, the waterproofing membrane 3 at the upper edge of the depressed part 5 to be warped, and therefore, the waterproofing membrane 3 is fixed below the edge position by the double-sided tape 15. When the double-sided tape 15 is stuck, one edge thereof is aligned with the upper edge of the recessed portion 5.

Further, the width of the double-sided tape 15 is more than 70 mm.

Preferably, the first sealing edge 13 is sealing paste and waterproof mortar. When the first sealing edge 13 is coated, it should be dense, continuous, full and firmly bonded. When the first sealing edge 13 is processed, the waterproof mortar is coated to compact the edge position of the waterproof roll 3, and then the sealing paste is coated.

Preferably, a second sealing edge 14 is arranged at the intersection of the pile head 1 and the lower concave part 5 of the cushion layer 2. The second sealing edge 14 surrounds the pile head 1 for one circle. The second sealing edge 14 can block the gap between the pile head 1 and the cushion layer 2 caused by relative displacement, so as to avoid the leakage of the waterproof structure. The second sealing lip 14 uses a sealing paste.

Preferably, the root of the steel bar extending out of the pile head 1 is provided with a water stop strip 16. The water stop strip 16 is a water stop strip capable of expanding when meeting water and has slow expansion performance. The water stop strip 16 is closely attached to the root of the steel bar and the seam base surface of the pile head 1, and the phenomena of hollowing, separation and the like cannot occur in the middle. The water stop strip 16 is firmly installed in the seam basal plane or the reserved groove of the pile head 1. When the water stop strip 16 adopts lap joint connection, the lap joint width is not less than 30 mm.

Preferably, the first waterproof layer 11 is a cement-based capillary crystalline waterproof coating, and the second waterproof layer 12 is a back hydraulic waterproof coating.

The construction process of the embodiment is as follows:

pile head 1 cleaning: the soil, the laitance, the loose rubble and the like on the surface of the pile head 1 are cleaned, the cleanness of the concrete base layer is ensured, and the extended reinforcing steel bars are adjusted in place.

Construction of the first waterproof layer 11: adopting cement-based capillary crystalline waterproof coating; the brushing part comprises the top and the side of the pile head 1, the surface of the concave part 5 of the cushion layer 2 and the periphery of the upper surface of the cushion layer 2 within 250 mm; care was taken to apply the brush in two passes. In order to ensure the thickness of the first waterproof layer 11, the material dosage is controlled to be 1.5kg per square meter, and the whole thickness is more than or equal to 1.0 mm.

Construction of the second waterproof layer 12: adopting a back water pressure waterproof coating; the painting part is consistent with the first waterproof layer 11. In order to ensure the thickness of the second waterproof layer 12, the material dosage is controlled to be 1.0kg per square meter, and the whole thickness is more than or equal to 1.0 mm.

Sticking the double-sided tape 15: a macromolecule double-sided tape 15 with the width of 80mm is adopted; the upper edge of the lower concave part 5 is aligned and adhered to the surface of the second waterproof layer 12 around the circumference.

And (3) construction of a waterproof roll material: adopting macromolecule pre-paved waterproof coiled material; the cushion layer 2 is flatly laid in the air, the edge of the cushion layer is attached to the upper edge of the lower concave part 5, and the cushion layer is bonded through a polymer double-sided adhesive tape 15.

First seal hemming 13 treatment: adopting anti-crack waterproof mortar and high-molecular joint sealant; coating anti-crack waterproof mortar in the range of 50mm at the edge of the high-molecular pre-paved waterproof roll, and coating high-molecular joint sealing paste on the surface of the anti-crack waterproof roll.

And (3) second sealing edge covering 14 treatment: adopting high molecular node sealing paste; the brushing part is the intersection of the pile head 1 and the lower concave part 5 of the cushion layer 2.

And (3) construction of a water stop strip 16: the root of the reinforcing steel bar extending out of the pile head 1 is provided with a water-swelling water stop strip which is tightly and firmly attached to the reinforcing steel bar.

And (3) constructing a bottom plate 4: and pouring concrete above the waterproof coiled material 3 and the pile head 1 to form a bottom plate.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not limitations to the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A waterproof structure of a concave pile head comprises a pile head, a cushion layer and a waterproof coiled material on the upper surface of the cushion layer; the pile head penetrates through the cushion layer, and a lower concave part is arranged at the position of the cushion layer surrounding the pile head; the waterproof door is characterized by also comprising a first waterproof layer and a first sealing edge; the first waterproof layer completely covers the surface of the pile head and the surface of the lower concave part; the waterproof coiled material is paved to the upper edge of the lower concave part of the cushion layer; the first sealing wrapping edge completely covers the junction of the waterproof roll and the first waterproof layer.

2. The waterproof structure of a recessed pile head according to claim 1, wherein the first waterproof layer extends continuously from the side surface of the recessed portion of the mat layer to the upper surface of the mat layer.

3. The waterproof structure of a recessed pile head according to claim 2, wherein the waterproof roll and the first waterproof layer have an overlapping range of a width of 200mm to 300 mm.

4. The waterproof structure of a recessed pile head according to claim 2, further comprising a second waterproof layer completely covering the surface of the first waterproof layer.

5. The waterproof structure of a recessed pile head according to claim 1, further comprising a double-sided tape, wherein the waterproof roll is attached to the upper edge of the recessed portion of the mat layer by the double-sided tape.

6. The waterproof structure of a recessed pile head of claim 5, wherein the width of the double-sided tape is greater than 70 mm.

7. The waterproof structure of a recessed pile head according to claim 1, wherein the first sealing edge is a sealant and/or a waterproof mortar.

8. The waterproof structure of a recessed pile head of claim 1, wherein a second sealing edge is provided at the intersection of the pile head and the recessed portion of the mat layer.

9. The waterproof structure of a recessed pile head according to claim 4, wherein said first waterproof layer is a cement-based permeable crystalline waterproof coating, and said second waterproof layer is a back hydraulic waterproof coating.

10. A water-proofing structure of a recessed pile head according to any one of claims 1 to 9, wherein a water-stopping strip or a water-stopping glue is provided at the root of the reinforcing bar extending from the pile head.