CN115341586B - Waterproof construction operation method for anti-pulling pile head of CFG pile - Google Patents
Waterproof construction operation method for anti-pulling pile head of CFG pile Download PDFInfo
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- CN115341586B CN115341586B CN202210943122.9A CN202210943122A CN115341586B CN 115341586 B CN115341586 B CN 115341586B CN 202210943122 A CN202210943122 A CN 202210943122A CN 115341586 B CN115341586 B CN 115341586B
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- 238000010276 construction Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000010410 layer Substances 0.000 claims abstract description 123
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 84
- 239000011414 polymer cement Substances 0.000 claims abstract description 79
- 239000000463 material Substances 0.000 claims abstract description 35
- 239000012790 adhesive layer Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 15
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 10
- 239000004567 concrete Substances 0.000 claims abstract description 7
- 230000001680 brushing effect Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 19
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 6
- 238000004090 dissolution Methods 0.000 claims description 4
- 238000004078 waterproofing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 10
- 230000008961 swelling Effects 0.000 description 8
- 238000012856 packing Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000002313 adhesive film Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229920005570 flexible polymer Polymers 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a waterproof construction operation method of a CFG pile head, which comprises the following concrete construction steps: s1, paving a bottom cushion layer of a basic bearing platform around a pile head; s2, brushing a waterproof adhesive layer on the pile head part of the CFG pile and the bottom cushion layer of the foundation pile cap; s3, covering the waterproof coiled material on the waterproof adhesive layer and the bottom cushion layer of the basic bearing platform; s4, installing a water-swelling water stop ring on the periphery of the bottom of the CFG pile, extending out of the reinforcing steel bars, wherein the periphery of the water-swelling water stop ring is coated with a water-soluble film layer; s5, fixing a closed container on the periphery of the protruded steel bars of the CFG pile and the periphery of the protruded steel bars of the CFG pile; s6, adding the polymer cement waterproof mortar to the waterproof adhesive layer and the upper side of the waterproof coiled material; s7, keeping the closed container in a positive pressure state, then releasing pressure of the closed container, and removing the closed container; and S8, pouring reinforced concrete outside the polymer cement waterproof mortar layer and the bottom cushion layer of the foundation pile cap. The invention can effectively and greatly reduce the water seepage probability of the CFG pile head.
Description
Technical Field
The invention relates to a waterproof construction operation method of a pulling-resistant pile head of a CFG pile, and belongs to the technical field of waterproof construction of pile heads of CFG piles.
Background
The traditional waterproof construction operation of the anti-floating pile head of the CFG pile is mostly to directly carry out waterproof layer arrangement between the bottom cushion layer of the foundation bearing platform and the pile head of the CFG pile, the waterproof layer adopts APF-C pre-paved high polymer self-adhesive film waterproof coiled materials (non-asphalt), then polymer cement waterproof mortar layer paving is carried out, and finally a layer of reinforced concrete layer is poured on the periphery of the polymer cement waterproof mortar layer and the periphery of the waterproof coiled materials.
Because the distance between the uplift piles is relatively dense and is generally 1500-1700mm, and each uplift pile is provided with a plurality of uplift steel bars which extend upwards, great difficulty is brought to the laying of the waterproof coiled materials and the waterproof treatment of the pile heads, so that gaps exist between the waterproof coiled materials and the heads of the uplift piles, and the hidden danger of water seepage exists. In addition, cracks are easy to generate between the anti-pulling steel bars and the polymer cement waterproof mortar layer, so that the hidden danger of water seepage is further increased. In order to solve the problem of cracking between the anti-pulling steel bar and the polymer cement waterproof mortar layer, the current method is as follows: the water-swelling water-stop ring device is arranged on the periphery of the anti-pulling steel bar, the water-swelling water-stop ring swells when meeting water in the casting process of the subsequent polymer cement waterproof mortar layer, and huge contact pressure is effectively generated through swelling deformation of the water-swelling water-stop ring, so that a sufficient sealing effect is effectively formed on the surface of the anti-pulling steel bar. However, during the expansion deformation process of the water-swelling waterproof ring, the polymer cement waterproof mortar is still in a plastic deformation process, so that the polymer cement waterproof mortar deforms along with the expansion of the water-swelling waterproof ring, and the contact between the water-swelling waterproof ring and the polymer cement waterproof mortar layer is not improved although the water-swelling waterproof ring and the anti-pulling steel bar have a sufficient closing effect, so that a seepage point exists between the water-swelling waterproof ring and the polymer cement waterproof mortar layer, and the position of the seepage point is only transferred from the position between the anti-pulling steel bar and the polymer cement waterproof mortar layer to the position between the water-swelling waterproof ring and the polymer cement waterproof mortar layer.
Therefore, the invention develops a waterproof construction operation method for the CFG pile head capable of effectively and simultaneously treating the space between the bottom surface cushion layer of the foundation bearing platform and the head of the uplift pile and the space between the uplift steel bar, the water-swelling water stop ring and the polymer cement waterproof mortar layer, so that the water seepage probability is greatly reduced.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a waterproof construction operation method for a pulling-resistant pile head of a CFG pile, which can effectively solve the technical problems in the prior art.
The technical scheme of the invention is as follows:
a waterproof construction operation method of a CFG pile anti-pulling pile head comprises the following concrete construction steps:
s1, paving a bottom surface cushion layer of a foundation pile cap around a pile head of a CFG pile, wherein the upper part of the bottom surface cushion layer of the foundation pile cap is arranged flush with the top of the pile head of the CFG pile;
S2, brushing a waterproof adhesive layer on the pile head part of the CFG pile and the bottom surface cushion layer of the foundation pile cap at the periphery of the CFG pile, wherein the waterproof adhesive layer is polymer cement waterproof adhesive;
s3, covering the waterproof coiled material provided with the openings on the waterproof adhesive layer and the cushion layer on the bottom surface of the basic bearing platform, wherein the openings of the waterproof coiled material are positioned on the inner side of the edge of the waterproof adhesive layer;
s4, installing a water-swelling water stop ring at the periphery of the bottom of the extending steel bar of the CFG pile, wherein before the installation of the water-swelling water stop ring, all the side faces of the extending steel bar, which are not contacted with the CFG pile, of the water-swelling water stop ring are coated with a water-soluble film layer,
S5, fixing a closed container on the periphery of the protruded reinforcing steel bars of the CFG pile, wherein the bottom of the closed container is closed on a base bearing platform bottom cushion layer outside the waterproof coiled material, a feeding hole with a valve is arranged at the upper part of the closed container, and the top of the closed container is externally connected with a corresponding booster pump through a corresponding pressurizing pipe;
S6, defining the complete dissolution time of the water-soluble film layer as t 1, adding polymer cement waterproof mortar to the waterproof adhesive layer and the upper side of the waterproof coiled material through a feed port with a valve in the time t 1 to form a polymer cement waterproof mortar layer on the waterproof adhesive layer and the upper side of the waterproof coiled material, embedding a water-swelling water stop ring in the polymer cement waterproof mortar layer, closing the valve with the feed port with the valve, and opening a booster pump to enable the inside of the closed container to be in a positive pressure state;
S7, defining the initial setting time of the polymer cement waterproof mortar layer as t 2, wherein the time t 1＝(0.01～0.1)t2 is within the time t 2, keeping the positive pressure state of the closed container, releasing the pressure of the closed container, and removing the closed container;
And S8, pouring reinforced concrete outside the polymer cement waterproof mortar layer and the bottom cushion layer of the foundation pile cap, wherein the reinforced concrete is coated on the periphery of the polymer cement waterproof mortar layer and the protruded reinforcing steel bars of the CFG pile.
The coating range of the waterproof glue layer is as follows: and the pile head part of the CFG pile is outwards expanded by at least 250mm by taking the CFG pile as the center, so that the waterproof adhesive layer effectively extends to the bottom surface cushion layer of the foundation bearing platform at the periphery of the CFG pile.
The waterproof glue layer is painted for three times, and the thickness of the waterproof glue layer is not more than 2mm.
The strength grade of the polymer cement waterproof mortar layer is M10, and the initial setting time of the polymer cement waterproof mortar layer is t 2 =3-4 h.
The sealed container is carried by a corresponding movable vehicle body, the movable vehicle body is fixedly connected with a corresponding suspension arm outwards, the suspension arm is fixedly connected with a corresponding lifting hydraulic cylinder downwards, the top of the sealed container is fixedly connected to a piston column of the lifting hydraulic cylinder, a circle of corresponding sealing gasket is fixedly connected to the bottom of the sealed container, and the booster pump is fixedly arranged on the movable vehicle body.
The bottom integrated molding of airtight container is provided with the round corresponding slot downwards, sealing washer's top be provided with the grafting protruding edge of slot looks adaptation, sealing washer's grafting protruding edge is fixed to through the gluey mode in the slot, just sealing washer's bottom cross section is narrow down wide trapezoidal form setting.
The thickness of the polymer cement waterproof mortar layer is not less than 20mm.
In the step S5, the booster pump is started to enable the pressure in the closed container to be not less than 1.6MPa.
And the bottom cushion layer of the foundation bearing platform is a C20 concrete cushion layer.
At least one corresponding filler groove is inwards arranged on the side surface, which is not contacted with the CFG pile and extends out of the reinforcing steel bar, of the water-swelling water stop ring, and the cross section of the filler groove is in a necking shape with wide inner part and narrow outer part.
The invention has the advantages that:
1) According to the invention, a waterproof adhesive layer is coated in advance between the laying of the waterproof coiled materials, effectively covers the pile head part of the whole CFG pile and extends to the bottom surface cushion layer of the foundation bearing platform at the periphery of the CFG pile; on the basis, the waterproof coiled material is effectively paved until the opening of the waterproof coiled material is positioned at the inner side of the waterproof adhesive layer. Through the cooperation of waterproof glue film and waterproofing membrane, can effectively solve the problem that there is the space between waterproofing membrane and the head of uplift pile to effectively promote the waterproof performance between foundation pile cap bottom surface bed course and the head of uplift pile by a wide margin.
2) Before the water-swelling water-stop ring is installed, a layer of water-soluble film layer is coated on the periphery of the water-swelling water-stop ring in advance, the complete dissolution time of the water-soluble film layer is t 1, the polymer cement waterproof mortar is added into the airtight container through a feed port with a valve in the time t 1, and is covered on the waterproof adhesive layer and the upper side of the waterproof coiled material, so that a polymer cement waterproof mortar layer is formed on the waterproof adhesive layer and the upper side of the waterproof coiled material, the water-swelling water-stop ring is embedded in the polymer cement waterproof mortar layer, then the valve with the feed port of the valve is closed, and a booster pump is started, so that the inside of the airtight container is in a positive pressure state, and sufficient pressure is formed on the polymer cement waterproof mortar.
The initial setting time of the polymer cement waterproof mortar layer is t 2,t1＝(0.01～0.1)t2, so that the water-soluble film layer is completely dissolved after the initial setting of the polymer cement waterproof mortar layer is started, and the water-swelling water-stop ring starts to produce water absorption swelling. The inner ring of the water-swelling water stop ring in the swelling process effectively generates larger contact pressure on the extending steel bars of the CFG pile and fills all irregular surfaces, holes and gaps of the joints, thereby thoroughly preventing leakage; the other parts except the inner ring of the waterproof mortar form larger contact pressure with the pressed polymer cement waterproof mortar, and form interaction force with the pressed polymer cement waterproof mortar, after the polymer cement waterproof mortar layer is initially set, the strength of the polymer cement waterproof mortar layer reaches 60-75% of the final strength, so that the contact pressure of the water-swelling waterproof ring can be effectively treated, the contact effect of the polymer cement waterproof mortar and the water-swelling waterproof ring can be greatly improved, the swelling capacity of the water-swelling waterproof ring can be pressed to a certain extent, the water-swelling waterproof ring can be in a pressed state, the swelling trend is kept, and the combination effect between the water-swelling waterproof ring and the polymer cement waterproof mortar layer is effectively improved, so that the waterproof performance among the anti-pulling reinforcing steel bars, the water-swelling waterproof ring and the polymer cement waterproof mortar layer is greatly improved.
3) After the polymer cement waterproof mortar completes initial setting, the closed container is decompressed, the closed container is removed, and reinforced concrete pouring is performed outside the polymer cement waterproof mortar layer and the bottom surface cushion layer of the foundation bearing platform, so that the reinforced concrete is coated on the periphery of the polymer cement waterproof mortar layer and the protruded reinforcing steel bars of the CFG pile. At this time, the polymer cement waterproof mortar has a longer time from the final setting state, so that the combination of the reinforced concrete and the polymer cement waterproof mortar layer is not influenced, and the practical effect of the invention is effectively ensured.
4) The side surface of the water-swelling water stop ring, which is not contacted with the steel bars extending out of the CFG pile, is internally provided with at least one corresponding filler groove, and the cross section of the filler groove is in a necking shape with wide inside and narrow outside. After the polymer cement waterproof mortar is pressed, acting force can be formed on the water-swelling waterproof ring effectively, the polymer cement waterproof mortar can be fully fed into the packing groove, and the water-swelling waterproof ring is continuously in a swelling trend, so that the polymer cement waterproof mortar can clamp materials fed into the packing groove, a seal is added between the polymer cement waterproof mortar layer and the materials fed into the packing groove, and the waterproof performance between the water-swelling waterproof ring and the polymer cement waterproof mortar layer is effectively and further improved greatly.
5) The water-soluble film is dissolved into CO 2 and H 2 O, a small amount of H 2 O does not obviously affect the polymer cement waterproof mortar layer, and a small amount of CO 2 is extruded and discharged in the compression process of the polymer cement waterproof mortar layer, so that adverse effects caused by the application of the water-soluble film are effectively eliminated.
Drawings
Fig. 1 is a construction flow chart of the present invention.
Fig. 2 is a schematic structural view of the uplift pile head after waterproof construction.
FIG. 3 is a schematic view of a structure with water-swellable water stop rings mounted on extended rebar.
FIG. 4 is a schematic view of the structure of a water-swellable water-stop ring after the water-soluble film layer is dissolved.
Fig. 5 is a schematic view of the structure of a vehicle body in which a closed casing and a booster pump are mounted.
FIG. 6 is a schematic view of a sealing gasket fixedly connected to the bottom of a closed container.
Detailed Description
For the convenience of understanding by those skilled in the art, the structure of the present invention will now be described in further detail with reference to the accompanying drawings:
Referring to fig. 1-6, a waterproof construction method for a uplift pile head of a CFG pile comprises the following specific construction steps:
s1, paving a foundation pile cap bottom surface cushion layer 2 around a pile head of a CFG pile 1, wherein the upper height of the foundation pile cap bottom surface cushion layer 2 is flush with the top of the pile head of the CFG pile 1, and the foundation pile cap bottom surface cushion layer 2 is a C20 concrete cushion layer;
s2, brushing a waterproof adhesive layer 3 on the pile head part of the CFG pile 1 and the bottom cushion layer 2 of the foundation bearing platform at the periphery of the CFG pile 1, wherein the waterproof adhesive layer 3 adopts polymer cement waterproof adhesive;
The coating range of the waterproof adhesive layer 3 is as follows: the pile head part of the CFG pile 1 is outwards expanded by 280mm by taking the CFG pile 1 as the center, so that the waterproof adhesive layer 3 effectively extends to the bottom surface cushion layer 2 of the foundation bearing platform at the periphery of the CFG pile 1;
the polymer cement waterproof adhesive adopted in the embodiment is specifically "Ke shun product line-good wall coating pre-flexible polymer cement waterproof adhesive KS 901B", wherein the waterproof adhesive layer is coated in three times, and the thickness of the waterproof adhesive layer is 1.2mm;
S3, covering the waterproof coiled material 4 provided with the holes on the waterproof adhesive layer 3 and the bottom cushion layer 2 of the foundation bearing platform, wherein the holes of the waterproof coiled material 4 are positioned on the inner side of the edge of the waterproof adhesive layer 3;
The waterproof coiled material 4 is available commercially, and is not described herein, the thickness of the waterproof coiled material 4 in the embodiment is 1.5mm, in the construction process, the middle of the waterproof coiled material 4 is cut in advance, the bottom surface of the waterproof coiled material 4 at the periphery of the cut is ground into an inclined surface shape, and the inclined surface is attached and fixed on the inner side of the edge of the waterproof adhesive layer 3;
S4, installing a water-swelling water stop ring 7 on the periphery of the bottom of the extending steel bar 6 of the CFG pile 1, wherein before installing the water-swelling water stop ring 7, the water-swelling water stop ring 7 is customized and purchased by corresponding factories, at least one corresponding packing groove 8 is inwards arranged on the side surface of the extending steel bar 6 of the CFG pile 1, which is not contacted with the water-swelling water stop ring 7, and the cross section of the packing groove 8 is in a necking shape with wide inner part and narrow outer part, and most importantly: by means of heat shrinkage covering, a layer of water-soluble film layer 9 is coated on all sides, which are not contacted with the extended steel bars 6 of the CFG pile 1, of the water-swellable water-stop ring 7, and the complete dissolution time t 1 = 13min of the water-soluble film layer 9 covered on the periphery of the water-swellable water-stop ring 7 adopted in the embodiment;
S5, fixing a closed container 10 on the periphery of the CFG pile 1, extending out of the reinforcing steel bars 6, wherein the bottom of the closed container 10 is closed on the base bearing platform bottom surface cushion layer 2 outside the waterproof coiled material 4, a feeding port 11 with a valve is arranged at the upper part of the closed container 10, and a corresponding booster pump 13 is connected to the top of the closed container 10 outwards through a corresponding pressurizing pipe 12;
s6, adding polymer cement waterproof mortar to the waterproof adhesive layer 3 and the upper side of the waterproof coiled material 4 through a feeding hole 11 with a valve in the time period t 1 (13 min) so as to form a polymer cement waterproof mortar layer 5 on the waterproof adhesive layer 3 and the upper side of the waterproof coiled material 4, embedding a water-swelling water stop ring 7 in the polymer cement waterproof mortar layer 5, closing the valve with the feeding hole 11, and opening a booster pump 13 so as to enable the inside of the closed container 10 to be in a positive pressure state;
the strength grade of the polymer cement waterproof mortar layer 5 in the embodiment is M10, the initial setting time of the polymer cement waterproof mortar layer 5 is t 2 =3.5 h (210 min), and the thickness of the polymer cement waterproof mortar layer 5 is controlled to be 20mm;
S7, keeping the pressure in the closed container 10 at 6MPa in the positive pressure state within the time period t 2 (210 min), releasing the pressure in the closed container 10, and withdrawing the closed container 10;
s8, pouring reinforced concrete outside the polymer cement waterproof mortar layer 5 and the bottom cushion layer 2 of the foundation bearing platform, wherein the reinforced concrete is coated on the periphery of the polymer cement waterproof mortar layer 5 and the extension steel bars 6 of the CFG pile 1, the reinforced concrete is C25 concrete, and the thickness is controlled to be more than 250 mm.
According to the invention, through the matching of the waterproof adhesive layer 3 and the waterproof coiled material 4, the problem that a gap exists between the waterproof coiled material 4 and the head of the uplift pile can be effectively solved, so that the waterproof performance between the bottom surface cushion layer 2 of the foundation bearing platform and the head of the uplift pile is greatly and effectively improved.
In the invention, after the initial setting of the polymer cement waterproof mortar layer 5 is started, the water-soluble film layer 9 is completely dissolved, so that the water-swelling water stop ring 7 starts to produce water absorption swelling. The inner ring of the water-swelling water stop ring 7 in the swelling process effectively generates larger contact pressure to the extension steel bars 6 of the CFG pile 1 and fills all irregular surfaces, holes and gaps of the joints, thereby thoroughly preventing leakage; the other parts except the inner ring of the waterproof mortar form larger contact pressure with the pressed waterproof mortar, and form interaction force with the pressed waterproof mortar, the strength grade of the waterproof mortar layer 5 in the embodiment is M10, after the waterproof mortar layer 5 completes initial setting, the strength of the waterproof mortar layer 5 reaches 60-75% of the final strength (6-7.5 Kg pressure), the contact pressure of the waterproof ring 7 can be effectively acted, thus, the contact effect of the waterproof mortar and the waterproof ring 7 can be greatly increased, the expansion amount of the waterproof ring 7 can be pressed to a certain extent, the waterproof ring can be in an extruded state, the expansion trend is kept, and the bonding effect between the waterproof ring 7 and the waterproof mortar layer 5 is effectively improved, so that the waterproof performance between the reinforcing steel bar 6 and the waterproof ring 7 and the waterproof mortar layer 5 is greatly improved.
After the polymer cement waterproof mortar completes initial setting, the closed container 10 is depressurized, the closed container 10 is removed, and reinforced concrete pouring is performed outside the polymer cement waterproof mortar layer 5 and the bottom cushion layer 2 of the foundation pile platform, so that the reinforced concrete is coated on the periphery of the polymer cement waterproof mortar layer 5 and the periphery of the extension steel bars 6 of the CFG pile 1. At this time, the polymer cement waterproof mortar has a longer time from the final setting state, so that the combination of the reinforced concrete and the polymer cement waterproof mortar layer 5 is not affected, and the practical effect of the invention is effectively ensured.
The airtight container 10 adopted in step S5 of the present invention is carried by a corresponding movable vehicle body 14, the movable vehicle body 14 is fixedly connected with a corresponding suspension arm 15 outwards, the suspension arm 15 is fixedly connected with a corresponding lifting hydraulic cylinder 16 downwards, the top of the airtight container 10 is fixedly connected to a piston column of the lifting hydraulic cylinder 16, a circle of corresponding sealing gasket 17 is fixedly connected to the bottom of the airtight container 10, and the booster pump 13 is fixedly arranged on the movable vehicle body 14. The bottom of the closed container 10 is integrally formed and downwards provided with a circle of corresponding slots, the top of the sealing gasket 17 is provided with a plug-in convex edge matched with the slots, the plug-in convex edge of the sealing gasket 17 is fixed into the slots in an adhesive mode, and the cross section of the bottom of the sealing gasket 17 is in a trapezoid shape with a narrow upper part and a wide lower part.
After the polymer cement waterproof mortar layer 5 is pressed, the polymer cement waterproof mortar layer has huge pressure on the sealing gasket 17, and the acting force of materials on the sealing gasket 17 is effectively dispersed into outward and downward pushing force through the trapezoid arrangement of the upper narrow bottom and the lower wide bottom of the sealing gasket 17, so that the assembly stability of the sealing gasket 17 can be effectively ensured, the tightness between the sealing gasket and the bottom cushion layer 2 of the foundation pile cap can be effectively improved, and the practical effect of the polymer cement waterproof mortar layer is effectively improved.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. The waterproof construction operation method of the anti-pulling pile head of the CFG pile is characterized by comprising the following concrete construction steps:
s1, paving a bottom surface cushion layer of a foundation pile cap around a pile head of a CFG pile, wherein the upper part of the bottom surface cushion layer of the foundation pile cap is arranged flush with the top of the pile head of the CFG pile;
S2, brushing a waterproof adhesive layer on the pile head part of the CFG pile and the bottom surface cushion layer of the foundation pile cap at the periphery of the CFG pile, wherein the waterproof adhesive layer is polymer cement waterproof adhesive;
s3, covering the waterproof coiled material provided with the openings on the waterproof adhesive layer and the cushion layer on the bottom surface of the basic bearing platform, wherein the openings of the waterproof coiled material are positioned on the inner side of the edge of the waterproof adhesive layer;
s4, installing a water-swelling water stop ring on the periphery of the bottom of the protruded steel bar of the CFG pile, wherein before the water-swelling water stop ring is installed, all sides of the protruded steel bar, which are not contacted with the CFG pile, of the water-swelling water stop ring are coated with a water-soluble film layer;
S5, fixing a closed container on the periphery of the protruded reinforcing steel bars of the CFG pile, wherein the bottom of the closed container is closed on a base bearing platform bottom cushion layer outside the waterproof coiled material, a feeding hole with a valve is arranged at the upper part of the closed container, and the top of the closed container is externally connected with a corresponding booster pump through a corresponding pressurizing pipe;
The closed container is carried by a corresponding movable vehicle body, a corresponding suspension arm is fixedly connected to the movable vehicle body outwards, a corresponding lifting hydraulic cylinder is fixedly connected to the suspension arm downwards, the top of the closed container is fixedly connected to a piston column of the lifting hydraulic cylinder, a circle of corresponding sealing gasket is fixedly connected to the bottom of the closed container, and the booster pump is fixedly arranged on the movable vehicle body;
the bottom of the closed container is integrally formed and downwards provided with a circle of corresponding slots, the top of the sealing gasket is provided with an inserting convex edge matched with the slots, the inserting convex edge of the sealing gasket is fixed in the slots in an adhesive mode, and the cross section of the bottom of the sealing gasket is in a trapezoid shape with a narrow upper part and a wide lower part;
S6, defining the complete dissolution time of the water-soluble film layer as t 1, adding polymer cement waterproof mortar to the waterproof adhesive layer and the upper side of the waterproof coiled material through a feed port with a valve in the time t 1 to form a polymer cement waterproof mortar layer on the waterproof adhesive layer and the upper side of the waterproof coiled material, embedding a water-swelling water stop ring in the polymer cement waterproof mortar layer, closing the valve with the feed port with the valve, and opening a booster pump to enable the inside of the closed container to be in a positive pressure state;
S7, defining the initial setting time of the polymer cement waterproof mortar layer as t 2, wherein the time t 1＝(0.01～0.1)t2 is within the time t 2, keeping the positive pressure state of the closed container, releasing the pressure of the closed container, and removing the closed container;
And S8, pouring reinforced concrete outside the polymer cement waterproof mortar layer and the bottom cushion layer of the foundation pile cap, wherein the reinforced concrete is coated on the periphery of the polymer cement waterproof mortar layer and the protruded reinforcing steel bars of the CFG pile.
2. The waterproof construction method of the anti-pulling pile head of the CFG pile according to claim 1, wherein the waterproof glue layer is coated in the following range: and the pile head part of the CFG pile is outwards expanded by at least 250mm by taking the CFG pile as the center, so that the waterproof adhesive layer effectively extends to the bottom surface cushion layer of the foundation bearing platform at the periphery of the CFG pile.
3. The construction method for the anti-pulling pile head of the CFG pile according to claim 1, wherein the waterproof glue layer is painted in three times, and the thickness of the waterproof glue layer is not more than 2mm.
4. The construction method for the anti-pulling pile head of the CFG pile according to claim 1, wherein the strength grade of the polymer cement waterproof mortar layer is M10, and the initial setting time of the polymer cement waterproof mortar layer is t 2 =3-4 h.
5. The construction method for waterproofing a pile head of a CFG pile according to claim 1, wherein the thickness of the polymer cement waterproof mortar layer is not less than 20mm.
6. The method for waterproofing a pile head for a CFG pile according to claim 1, wherein in step S5, the booster pump is turned on to make the pressure in the closed container not less than 1.6MPa.
7. The construction method for the anti-pulling pile head of the CFG pile according to claim 1, wherein the bottom cushion layer of the foundation pile cap is a C20 concrete cushion layer.
8. The waterproof construction method for the uplift pile head of the CFG pile according to claim 1, wherein the side surface of the water-swelling water stop ring, which is not contacted with the steel bars extending out of the CFG pile, is internally provided with at least one corresponding filler groove, and the cross section of the filler groove is in a necking shape with wide inner part and narrow outer part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102080390A (en) * | 2010-11-23 | 2011-06-01 | 二十二冶集团第一建设有限公司 | Composite winter construction pile head waterproof construction process |
| CN103628506A (en) * | 2013-11-14 | 2014-03-12 | 中建六局土木工程有限公司 | Construction method for waterproof positions of foundation platform and pile head |
| CN105951893A (en) * | 2016-06-27 | 2016-09-21 | 中铁第四勘察设计院集团有限公司 | Uplift pile head node waterproof structure and construction method thereof |
| CN106759308A (en) * | 2016-11-30 | 2017-05-31 | 中国冶集团有限公司 | A kind of precast hollow pile head waterproof construction method |
| CN110607809A (en) * | 2019-08-12 | 2019-12-24 | 中国建筑第二工程局有限公司 | Waterproof construction method for basement of building engineering |
| CN110644482A (en) * | 2019-08-22 | 2020-01-03 | 中国十七冶集团有限公司 | Waterproof construction method for PHC pipe pile head of super-large-area terrace |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080390A (en) * | 2010-11-23 | 2011-06-01 | 二十二冶集团第一建设有限公司 | Composite winter construction pile head waterproof construction process |
| CN103628506A (en) * | 2013-11-14 | 2014-03-12 | 中建六局土木工程有限公司 | Construction method for waterproof positions of foundation platform and pile head |
| CN105951893A (en) * | 2016-06-27 | 2016-09-21 | 中铁第四勘察设计院集团有限公司 | Uplift pile head node waterproof structure and construction method thereof |
| CN106759308A (en) * | 2016-11-30 | 2017-05-31 | 中国冶集团有限公司 | A kind of precast hollow pile head waterproof construction method |
| CN110607809A (en) * | 2019-08-12 | 2019-12-24 | 中国建筑第二工程局有限公司 | Waterproof construction method for basement of building engineering |
| CN110644482A (en) * | 2019-08-22 | 2020-01-03 | 中国十七冶集团有限公司 | Waterproof construction method for PHC pipe pile head of super-large-area terrace |
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