Waterproof treatment process for uplift pile

Abstract

The invention relates to an uplift pile waterproof treatment process applied to the field of underground structures, according to the scheme, a pile body of an uplift pile is sleeved with a self-tightening type water stop strip ring for waterproofing, a metal heating embedded ring is heated through a flame gun, so that an internal low-temperature heat shrinkage film is heated to shrink, and a waterproof effect is achieved. The extrusion force generated when the low-temperature thermal shrinkage film is subjected to thermal shrinkage enables the sealing film to be tightly attached to the pile body, the sealing film can effectively eliminate gaps generated due to the fact that the surface of the pile body is irregular, and therefore the waterproof performance is effectively improved, and a waterproof sealing line is constructed in the waterproof performance. Meanwhile, the sealing strip is tightly attached to the pile body through the pushing effect, so that two additional waterproof sealing properties are constructed, the waterproof performance is further effectively improved, the sealing film and the sealing strip are matched with each other, water seepage above the uplift pile can be effectively prevented, and underground water seepage below the uplift pile can be effectively prevented from overflowing.

Description

Technical Field

[0001] The invention relates to a waterproof treatment process for an anti-pullout pile, in particular to a waterproof treatment process for an anti-pullout pile applied to the field of underground structures. Background Art

[0002] Waterproofing is crucial for pull-out piles, because water flowing into the gaps of the pull-out piles will cause the surrounding soil to loosen and damage, affecting the stability and compressive strength of the pull-out piles. In addition, water and moisture entering the interior of the pull-out piles will affect the use and life of the building. The waterproofing treatment of pull-out piles is to apply waterproof paint around the pile body, but there is still a gap between the pile body and the waterproof membrane, and the waterproofing effect is not good.

[0003] In order to solve the problem of poor waterproofing around the pile body, a certain pull-out pile waterproofing treatment process in the market adopts the design of laying polyurethane sealant, which has a certain market share.

[0004] The Chinese patent CN108517898B specification discloses a construction method for a waterproof structure at the joint between an anti-pulling pile and a base plate, and the invention includes the following steps: breaking the head of the anti-pulling pile, straightening the exposed steel bars at the head of the anti-pulling pile; setting multiple grouting pipes at the head of the anti-pulling pile, the bottom ends of the multiple grouting pipes are located at the joint between the head of the anti-pulling pile and the base plate, and the top ends of the multiple grouting pipes are all higher than the top surface of the base plate; first applying a layer of cement-based crystalline waterproof coating and epoxy mortar on the top of the head of the anti-pulling pile; laying a circle of water-expandable water-stopping glue at the contact between the steel bars of the head of the anti-pulling pile and the concrete of the anti-pulling pile; laying waterproofing coiled material; laying a circle of polyurethane sealant at the junction of the waterproofing coiled material and the anti-pulling pile along the four sides of the anti-pulling pile body; pouring a fine stone concrete protective layer; after the base plate is poured, grouting is injected into the multiple grouting pipes. The present invention ensures the waterproof effect by filling the gap between the base plate and the anti-pulling pile in the multiple grouting pipes.

[0005] The specification of Chinese patent CN213014379U discloses a waterproof structure for the head of an anti-pulling pile, which includes a pile head and a pile peripheral cushion layer arranged outside the pile head, and an annular groove composed of an inner iron ring and an outer iron ring is arranged on the top of the pile head, and the annular groove is filled with a sealing paste. The top and side of the pile head are coated with a waterproof coating layer. The outside of the waterproof coating layer is brushed with a waterproof mortar layer. A composite cushion waterproof layer is also arranged on the top of the waterproof coating layer on the outer cushion layer of the pile head, and an additional waterproof layer is arranged between the cushion waterproof layer and the inner corner where the outer cushion layer of the pile contacts the pile head, and the gap where the cushion waterproof layer and the side of the pile head meet is filled with a sealing paste. In the above scheme, the pile head adopts cement-based penetrating crystallization coating and cement mortar with an annular groove to effectively isolate groundwater from spreading upward, and at the same time avoid the disturbance of the steel bars on the top of the pile to cause gap cracks and water immersion. The additional waterproof layer is added at the inner corner to prevent the gap defects caused by the deformation and slipping of the waterproof roll material.

[0006] Although there are devices for sealing around the pile body in the existing waterproof treatment process, the pile body of the pull-out pile is not a regular circle, and the water stop strips, iron rings, waterproof layers, etc. are all industrial products with relatively regular specifications. Therefore, it is difficult to fit tightly with the pile body of the pull-out pile, resulting in a gap between the two, which reduces the anti-seepage effect, and the treatment process is also relatively complicated. Summary of the invention

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to improve the waterproof performance around the pile body.

[0008] In order to solve the above problems, the present invention provides a waterproof treatment process for anti-pullout piles, comprising the following treatment steps: S1. First, grind the pile head and surrounding area of ​​the anti-pullout pile to increase the surface roughness so that the waterproof coating can be better adsorbed on it; S2. Then apply cement-based penetrating crystalline waterproof coating on the top of the pile and within 200-260mm around it, and repeat the coating 2-4 times to ensure that all areas are coated with coating without blank areas; S3. After the cement-based penetrating crystalline waterproof coating is slightly dry, apply 2-4cm thick epoxy resin waterproof mortar on the top and body of the pile. When applying, try to keep the mortar thickness uniform; S4. After the mortar is dry, apply non-curing waterproof material within 300-350mm around the pile, and then lay SBS asphalt waterproof membrane on the non-curing waterproof material and the surrounding foundation. When laying, first lay 3mm thick and then 4mm thick; S5. After the SBS asphalt waterproofing membrane is laid, the non-curing waterproofing material is applied again within 300-350mm around the pile, and finally the self-tightening water stop ring is put on the pile head. At this point, the waterproofing treatment of the pull-out pile is completed, and then the subsequent construction process can be continued; Among them, the self-tightening waterstop ring includes a metal heating ring fixedly embedded in the side wall, the inner wall of the self-tightening waterstop ring is provided with an annular groove, and the metal heating ring is fixedly connected to a heat-conducting ring that penetrates into the inside of the annular groove, and the inner wall of the annular groove is fixedly connected to a low-temperature heat shrink film.

[0009] In the above-mentioned anti-pullout pile waterproofing treatment process, the sealing performance is effectively improved by installing a self-tightening waterstop ring on the pile body of the anti-pullout pile. The self-tightening waterstop ring fits tightly with the pile body by heat shrinkage, thereby effectively solving the problem of gaps caused by irregular surface of the pile body, and the sealing and waterproofing effect is further improved by setting multiple sealing strips.

[0010] The installation method of the self-tightening water stop ring includes the following steps: N1. First, put the self-tightening water stop ring on the pull-out pile, and then press the self-tightening water stop ring with your hands to make it fit tightly with the non-curing waterproof material to avoid leaving a gap at the bottom; N2. Then use a flamethrower to spray the metal heating ring. The flame cannot stay in the same position for a long time during spraying to avoid damaging the original shape of the self-tightening water stop ring. Move the tip of the flamethrower slowly and evenly around the metal heating ring. Spray back and forth around the metal heating ring to ensure that the low-temperature heat shrink film shrinks evenly.

[0011] As a further improvement of the present application, a sealing film is fixedly connected to the opening of the annular groove near the pull-out pile, and the sealing film is in contact with the pile body of the pull-out pile. The space between the low-temperature heat shrinkable film and the sealing film is filled with a pushing liquid. When the metal heating ring is sprayed with a flamethrower, the metal heating ring absorbs heat and transfers the heat to the inside of the annular groove through the heat conductive ring, thereby heating the low-temperature heat shrinkable film. The low-temperature heat shrinkable film begins to shrink after being heated. The shrinking effect of the low-temperature heat shrinkable film causes the pushing liquid to squeeze the sealing film. The sealing film is in close contact with the pile body, which can effectively solve the irregular defects on the surface of the pile body and construct a waterproof sealing line, thereby effectively improving the waterproof performance around the pile body.

[0012] As a further improvement of the present application, the pushing liquid adopts antifreeze and the sealing film adopts a flexible elastic material. In order to prevent the pushing liquid from freezing and expanding in a low-temperature environment and destroying the self-tightening waterstop ring from the inside, the pushing liquid adopts low-temperature resistant antifreeze, and the sealing film can rely on its own elastic force to fit tightly to the pile body and further stick to the pile body under the extrusion of the pushing liquid.

[0013] As a further improvement of the present application, the self-tightening water stop ring is located on the upper and lower sides of the annular groove and is provided with multiple L-shaped through holes connected to the annular groove, and the openings of the multiple L-shaped through holes are fixedly connected with sealing strips that fit the pile body of the pull-out pile, and the upper and lower sealing strips are also fitted with the pile body, so that two waterproof sealing lines can be constructed on the upper and lower sides of the sealing film, thereby further effectively improving the waterproof performance around the pile body, and when the low-temperature heat shrinkable film heat shrinks and pushes the sealing film, the pushing liquid is also squeezed into the L-shaped through holes, and then the pushing liquid also pushes the sealing strip outward to further fit the pile body.

[0014] As a further improvement and supplement to the present application, the sealing strip includes a semicircular water-blocking ring, and the interior of the semicircular water-blocking ring is connected to the L-shaped through hole. The pushing liquid enters the interior of the semicircular water-blocking ring from the inside of the L-shaped through hole, and can further push the sealing strip outward to fit the pile body when the low-temperature heat shrink film shrinks.

[0015] As a further improvement and supplement to the present application, the semicircular water-blocking ring is made of water-absorbing and swelling rubber material, and the interior of the semicircular water-blocking ring is filled with an elastic net. The semicircular water-blocking ring can automatically expand after absorbing water, thereby achieving a waterproof effect, and the elastic net enables the sealing strip to fit tightly with the pile body by elastic force, thereby effectively eliminating gaps caused by the irregular surface of the pile body.

[0016] As another improvement of the present application, the height range of the self-tightening waterstop ring is 6-12 cm, and the width range of the self-tightening waterstop ring is 5-10 cm. The bottom side wall of the self-tightening waterstop ring is also fixedly connected with a protective flap, and the protective flap is made of transparent waterproof material. After the pull-out piles are waterproofed, workers will step on them if they are not careful, and they will also pile materials on the waterproof coating. Therefore, protective flaps are added on the basis of the self-tightening waterstop ring to cover the non-curing waterproof material to protect the waterproof coating.

[0017] As another improvement of the present application, the side edge of the self-tightening waterstop ring is a conical surface, and the self-tightening waterstop ring is made of water-absorbing and expanding rubber material. Concrete will be poured in the subsequent construction. The downward pressure of the concrete may cause the inner side of the self-tightening waterstop ring to warp, affecting the waterproof effect of the self-tightening waterstop ring. Therefore, the outer side surface of the self-tightening waterstop ring is set to a conical surface. In this way, when subjected to the downward pressure of the concrete, the horizontal decomposition force of the force on the conical surface will make the self-tightening waterstop ring close to the pile body without warping.

[0018] In summary, waterproofing is achieved by installing a self-tightening waterstop ring on the pile body of the pull-out pile, and heating the metal heating ring with a flamethrower to allow the internal low-temperature heat shrink film to shrink due to the heat. The extrusion force of the low-temperature heat shrink film during heat shrinkage makes the sealing film fit tightly against the pile body, and the sealing film can effectively eliminate the gaps caused by the irregular surface of the pile body, thereby effectively improving the waterproofing performance and constructing a waterproof sealing line. In addition, by adding two upper and lower sealing strips, the sealing strips are also tightly fitted to the pile body by using the pushing effect, thereby constructing two additional waterproof seals, thereby further effectively improving the waterproofing performance. The sealing film and the sealing strip cooperate with each other, which can not only effectively prevent the water above the pull-out pile from seeping in, but also effectively prevent the underground seepage below the pull-out pile from overflowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a processing flow chart of the first embodiment of the present application; Figure 2 This is a layout diagram of waterproof treatment of pull-out piles in the first embodiment of the present application; Figure 3 A three-dimensional diagram of a self-tightening water stop ring according to a first embodiment of the present application; Figure 4 This is a three-dimensional cutting diagram of the self-tightening water stop ring of the first embodiment of the present application; Figure 5 This is a state diagram of the low-temperature heat shrinkable film before heat shrinkage according to the second embodiment of the present application; Figure 6 for Figure 5 A partial enlarged view of the middle A; Figure 7 This is a state diagram of the low-temperature heat shrinkable film after heat shrinkage according to the second embodiment of the present application; Figure 8 for Figure 7 A partial enlarged view of point B in the middle; Fig. 9 This is a force analysis diagram of the self-tightening water stop ring of the second embodiment of the present application after pouring concrete; Fig.10 This is a front cross-sectional view of a sealing strip according to a second embodiment of the present application.

[0020] Description of the numbers in the figure: 1. Pull-out piles, 101. cement-based penetrating crystalline waterproof coating, 102. epoxy resin waterproof mortar, 103. non-curing waterproof material, 104. SBS asphalt waterproof membrane, 2. self-tightening water stop ring, 201. annular groove, 202. L-shaped through hole, 3. metal heating insert, 4. heat conductive ring, 5. low-temperature heat shrinkable film, 6. sealing film, 7. sealing strip, 701. semicircular water blocking ring, 702. elastic net, 8. protective flap. DETAILED DESCRIPTION

[0021] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0022] The first implementation method: Figure 1 , 2 As shown, the following processing steps are included: S1. First, the pile head and the surrounding area of ​​the pull-out pile 1 are polished to increase the surface roughness so that the waterproof coating can be better adsorbed thereon; S2. Then apply cement-based penetrating crystalline waterproof coating 101 on the top of the pile and within 200-260 mm of the surrounding area, and repeat the application 2-4 times to ensure that all areas are coated with the coating without any blank areas; S3. After the cement-based penetrating crystalline waterproof coating 101 is slightly dry, apply 2-4 cm thick epoxy resin waterproof mortar 102 on the pile top and pile body. When applying, try to keep the mortar thickness uniform; S4. After the mortar is dry, apply the non-curing waterproof material 103 within 300-350mm around the pile, and then lay the SBS asphalt waterproof membrane 104 on the non-curing waterproof material 103 and the surrounding foundation. When laying, first lay 3mm thick and then 4mm thick; S5, after the SBS asphalt waterproofing membrane 104 is laid, the non-curing waterproofing material 103 is applied again within the range of 300-350mm around the pile, and finally the self-tightening water stop ring 2 is put on the pile head. At this point, the waterproofing treatment of the pull-out pile 1 is completed, and then the subsequent construction process can be continued; Figure 3 , 4As shown, the self-tightening water stop strip ring 2 includes a metal heating ring 3 (preferably made of stainless steel, and other materials can also be selected according to actual needs) fixedly embedded in the side wall, the inner wall of the self-tightening water stop strip ring 2 is provided with an annular groove 201, and the metal heating ring 3 is fixedly connected with a heat conductive ring 4 that penetrates into the annular groove 201, the inner wall of the annular groove 201 is fixedly connected with a low-temperature heat shrinkable film 5 (preferably made of heat shrinkable PVC, and other materials can also be selected according to actual needs), the annular groove 201 is fixedly connected with a sealing film 6 at the opening of the pull-out pile 1, and the sealing film 6 is in contact with the pile body of the pull-out pile 1, and the space between the low-temperature heat shrinkable film 5 and the sealing film 6 is filled with pushing liquid, when the metal heating ring 3 is sprayed with a flamethrower, the metal heating ring 3 absorbs heat and transfers the heat The heat is transferred to the inside of the annular groove 201 through the heat-conducting ring 4, so as to heat the low-temperature heat shrinkable film 5. The low-temperature heat shrinkable film 5 begins to shrink after being heated. The shrinking effect of the low-temperature heat shrinkable film 5 causes the pushing liquid to squeeze the sealing film 6. The sealing film 6 fits tightly with the pile body, which can effectively solve the irregular defects on the surface of the pile body and construct a waterproof sealing line, thereby effectively improving the waterproof performance around the pile body. The pushing liquid adopts antifreeze liquid, and the sealing film 6 adopts a flexible elastic material (rubber material is preferably selected, and other materials can also be selected according to actual needs). In order to prevent the pushing liquid from freezing and expanding in a low-temperature environment and destroying the self-tightening water stop strip ring 2 from the inside, the pushing liquid adopts a low-temperature resistant antifreeze liquid, and the sealing film 6 can rely on its own elasticity to fit tightly with the pile body and further adhere to the pile body under the extrusion of the pushing liquid; Figure 5 , 6 , 7 and Figure 8 As shown, the installation method of the self-tightening water stop strip ring 2 includes the following steps: N1. First, put the self-tightening water stop ring 2 on the pull-out pile 1, and then press the self-tightening water stop ring 2 by hand to make it fit tightly with the non-curing waterproof material 103 to avoid leaving a gap at the bottom; N2. Then use a flamethrower to spray the metal heating ring 3. The flame cannot stay in the same position for a long time during spraying to avoid damaging the original shape of the self-tightening water stop ring 2. Move the tip of the flamethrower slowly and evenly around the metal heating ring 3. Spray back and forth around the metal heating ring 3 to ensure that the low-temperature heat shrink film 5 shrinks evenly.

[0023] The second implementation method: Figure 6 , 8It is shown that the self-tightening water stop strip ring 2 is provided with a plurality of L-shaped through holes 202 connected with the annular groove 201 on both upper and lower sides thereof, and the openings of the plurality of L-shaped through holes 202 are fixedly connected with sealing strips 7 which fit the pile body of the pull-out pile 1 at the same time, and the upper and lower sealing strips 7 also fit the pile body, so that two waterproof sealing lines can be constructed on the upper and lower sides of the sealing film 6, thereby further effectively improving the waterproof performance around the pile body, and when the low-temperature heat shrinkable film 5 heat shrinks and pushes the sealing film 6, the pushing liquid is also squeezed into the L-shaped through hole 202, and then the pushing liquid also pushes the sealing strip 7 outward to further fit the pile body; Fig.10 It is shown that the sealing strip 7 includes a semicircular water blocking ring 701, and the interior of the semicircular water blocking ring 701 is connected to the L-shaped through hole 202, and the pushing liquid enters the interior of the semicircular water blocking ring 701 from the interior of the L-shaped through hole 202, and can further push the sealing strip 7 outward to fit with the pile body when the low-temperature heat shrink film 5 heat shrinks, and the semicircular water blocking ring 701 is made of water-absorbing and swelling rubber material, and the interior of the semicircular water blocking ring 701 is filled with an elastic net 702, and the semicircular water blocking ring 701 can automatically expand after absorbing water, thereby achieving a waterproof effect, and the elastic net 702 enables the sealing strip 7 to fit closely with the pile body by elastic force, thereby effectively eliminating the gaps caused by the irregular surface of the pile body; Fig. 9 It is shown that the height range of the self-tightening water stop strip ring 2 is 6-12 cm, and the width range of the self-tightening water stop strip ring 2 is 5-10 cm. The bottom side wall of the self-tightening water stop strip ring 2 is also fixedly connected with a protective flap 8, and the protective flap 8 is made of transparent waterproof material (TPU material is preferred, and other materials can also be selected according to actual needs). After the pull-out pile 1 is waterproofed, workers will step on it if they are not careful, and they will also pile materials on the waterproof coating. Therefore, a protective flap 8 is added on the basis of the self-tightening water stop strip ring 2 to cover the non-solidified The waterproof material 103 plays a role in protecting the waterproof coating. The side of the self-tightening waterstop strip ring 2 is a conical surface, and the self-tightening waterstop strip ring 2 is made of water-absorbing and swelling rubber material. Concrete will be poured in the subsequent construction. The downward pressure of the concrete may cause the inner side of the self-tightening waterstop strip ring 2 to warp, affecting the waterproof effect of the self-tightening waterstop strip ring 2. Therefore, the outer side surface of the self-tightening waterstop strip ring 2 is set to a conical surface. In this way, when it is subjected to the downward pressure of the concrete, the horizontal decomposition force of the force on the conical surface will make the self-tightening waterstop strip ring 2 close to the pile body without warping.

[0024] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A waterproof treatment process for anti-pulling piles, characterized by: The processing steps include: S1. First, the pile head and the surrounding area of ​​the pull-out pile (1) are polished to increase the surface roughness so that the waterproof coating can be better adsorbed thereon; S2. Then, apply cement-based penetrating crystalline waterproof coating (101) on the top of the pile and within 200-260 mm of the surrounding area, and repeat the application 2-4 times to ensure that all areas are coated with the coating without any blank areas; S3. After the cement-based penetrating crystalline waterproof coating (101) is slightly dried, a 2-4 cm thick epoxy resin waterproof mortar (102) is applied to the pile top and pile body. When applying, the mortar thickness should be kept uniform as much as possible. S4. After the mortar is dry, apply non-curing waterproof material (103) within 300-350 mm around the pile, and then lay SBS asphalt waterproof membrane (104) on the non-curing waterproof material (103) and the surrounding foundation. When laying, first lay 3 mm thick and then lay 4 mm thick; S5. After the SBS asphalt waterproofing membrane (104) is laid, the non-curing waterproofing material (103) is applied again within a range of 300-350 mm around the pile, and finally the self-tightening water stop ring (2) is put on the pile head. At this point, the waterproofing of the pull-out pile (1) is completed, and the subsequent construction process can be continued; The self-tightening water stop ring (2) comprises a metal heating insert ring (3) fixedly embedded in the side wall, an annular groove (201) is provided on the inner wall of the self-tightening water stop ring (2), a heat conducting ring (4) penetrating into the annular groove (201) is fixedly connected to the metal heating insert ring (3), and a low-temperature heat shrink film (5) is fixedly connected to the inner wall of the annular groove (201).

2. A waterproof treatment process for anti-pulling piles according to claim 1, characterized in that: The method for installing the self-tightening water stop strip ring (2) comprises the following steps: N1. First, put the self-tightening water stop ring (2) on the pull-out pile (1), and then press the self-tightening water stop ring (2) down by hand to make it fit tightly with the non-curing waterproof material (103) to avoid leaving a gap at the bottom; N2. Then, use a flame spray gun to spray the metal heating insert (3). When spraying, the flame should not stay in the same position for a long time to avoid damaging the original shape of the self-tightening water stop ring (2). The tip of the flame spray gun should be moved slowly and evenly around the metal heating insert (3). The tip of the flame spray gun sprays back and forth around the metal heating insert (3) to ensure that the low-temperature heat shrink film (5) shrinks evenly.

3. The waterproof treatment process for anti-pulling piles according to claim 1 is characterized by: A sealing film (6) is fixedly connected to the opening of the annular groove (201) close to the pull-out pile (1), and the sealing film (6) fits the pile body of the pull-out pile (1), and the space between the low-temperature heat shrink film (5) and the sealing film (6) is filled with a pushing liquid.

4. A waterproof treatment process for anti-pulling piles according to claim 3, characterized in that: The pushing fluid is antifreeze fluid, and the sealing film (6) is made of a flexible elastic material.

5. The waterproof treatment process for anti-pulling piles according to claim 1 is characterized by: The self-tightening water stop strip ring (2) is provided with a plurality of L-shaped through holes (202) in communication with the annular groove (201) on both upper and lower sides of the annular groove (201), and sealing strips (7) in contact with the pile body of the pull-out pile (1) are fixedly connected to the openings of the plurality of L-shaped through holes (202).

6. A waterproof treatment process for anti-pulling piles according to claim 5, characterized in that: The sealing strip (7) comprises a semicircular water-blocking ring (701), and the interior of the semicircular water-blocking ring (701) is in communication with the L-shaped through hole (202).

7. The waterproof treatment process for anti-pulling piles according to claim 6 is characterized by: The semicircular water-blocking ring (701) is made of a water-swelling rubber material, and the interior of the semicircular water-blocking ring (701) is filled with an elastic net (702).

8. The waterproof treatment process for anti-pulling piles according to claim 1, characterized in that: The height of the self-tightening water stop ring (2) is in the range of 6-12 cm, and the width of the self-tightening water stop ring (2) is in the range of 5-10 cm. The bottom side wall of the self-tightening water stop ring (2) is also fixedly connected with a protective flap (8), and the protective flap (8) is made of a transparent waterproof material.

9. The waterproof treatment process for anti-pulling piles according to claim 1, characterized in that: The side of the self-tightening water stop strip ring (2) is a conical surface, and the self-tightening water stop strip ring (2) is made of water-absorbing and swelling rubber material.

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