CN111663575A - Construction method for post-forming waterproof construction of pile head - Google Patents
Construction method for post-forming waterproof construction of pile head Download PDFInfo
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- CN111663575A CN111663575A CN202010578290.3A CN202010578290A CN111663575A CN 111663575 A CN111663575 A CN 111663575A CN 202010578290 A CN202010578290 A CN 202010578290A CN 111663575 A CN111663575 A CN 111663575A
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/72—Pile shoes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
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- E02D2200/1607—Shapes round, e.g. circle
- E02D2200/1621—Shapes round, e.g. circle made from multiple elements
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0006—Plastics
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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Abstract
The invention discloses a construction method for post-forming waterproof construction of a pile head, and relates to the technical field of waterproof construction of a concrete cast-in-place pile head; the construction method comprises the following steps: pile head breaking, pile head secondary forming tool type mould assembling, mould mounting, pile head secondary forming and cushion concrete pouring, mould dismounting, mounting expansion water stop strip, waterproof mortar sealing, bottom plate waterproof construction, pile head coating cement base infiltration crystallization, mounting pile head exposed reinforced plastic sleeve factice crack pouring tool type mould and the like, therefore, a set of pile head secondary forming tool type mould and a plastic ointment crack pouring tool type mould are designed in a targeted way, and by implementing the technical scheme, the technical problem that leakage risks exist at the waterproof cross position of the pile head and the bottom plate can be effectively solved, leakage risks and hidden dangers existing in waterproof construction of the pile head are prevented, secondary repair cost caused by leakage of waterproof construction of the pile head is reduced, resources are saved, and construction efficiency of secondary forming of the pile head and waterproof construction quality of the pile head are improved.
Description
Technical Field
The invention relates to the technical field of waterproof construction of a pile head of a concrete cast-in-place pile, in particular to a construction method for secondary forming waterproof construction of the pile head.
Background
Along with the development of science and technology and the progress of society, the construction technology tends to the mature level, the country has great control over the building market quality, the requirements of consumers on the construction engineering quality are higher and higher, the understanding is stronger and stronger, and the construction unit has strict control over the construction quality.
The cast-in-place concrete pile is a common and economic foundation bearing form in the technical field of existing waterproof construction, the existing standard GB50108-2008 'underground waterproof engineering technical standard' and related 10J301 'underground building waterproof structure' only refer to a waterproof treatment method for the pile head, in the reference method, the treatment of the cross position of pile head waterproofing and bottom plate waterproofing is always a weak link, and leakage hidden danger still exists.
Disclosure of Invention
In order to solve the technical problem that leakage risks exist at the waterproof cross position of the pile head and the bottom plate in the existing construction, the invention aims to provide a construction method for secondary forming waterproof construction of the pile head, which aims to apply a secondary forming tool type mould of the pile head to construct at the waterproof cross position of the pile head and the bottom plate, can effectively prevent the leakage risks and hidden dangers existing in the waterproof construction of the pile head, reduce the secondary repair cost of the waterproof construction of the pile head due to leakage, save resources and improve the working efficiency of the secondary forming construction of the pile head and the waterproof construction quality of the pile head.
The technical scheme adopted by the invention is as follows:
a construction method for post-forming waterproof construction of a pile head is characterized in that a post-forming tool type mould is applied to construction at the crossing position of waterproof of the pile head and waterproof of a bottom plate, and the construction method comprises the following steps:
s1, pile head breaking: after the pile head is broken, the designed elevation is reached, and loose concrete and pile body soil on the surface of the pile head are cleaned;
s2, assembling the pile head secondary forming tool type mould: splicing the two semicircular inner ring-shaped components into an inner ring of the die, splicing the two semicircular outer ring-shaped components into an outer ring of the die, and finally splicing the inner ring of the die and the outer ring of the die into a whole die with a reserved groove;
s3, die mounting: the assembled mould is directly sleeved on the pile body of the pile head from the pile head, and the inner ring of the mould is directly fixed on the foundation soil of the foundation through a needle-point bolt arranged at the bottom of the inner ring;
s4, pile head secondary forming and cushion concrete pouring: synchronously pouring the pile head enlarged part and the bottom plate cushion layer concrete;
s5, removing the die: after the secondary forming construction of the pile head is completed, firstly removing the outer ring of the mould and then removing the inner ring of the mould, and after the mould is removed, forming a bottom groove and a reserved groove positioned on the side wall of the pile body around the root of the pile head;
s6, installing an expansion water stop strip: a water stopping strip which swells when meeting water is arranged in a groove reserved on the side wall of the formed pile body and is firmly fixed;
s7, sealing bottom groove waterproof mortar: and filling the bottom groove with micro-expansion waterproof mortar and plastering and compacting the bottom groove at the position where the bottom groove is formed around the root of the pile head.
The technical scheme aims at the technical problem that leakage risks and hidden dangers exist at the waterproof cross position of a pile head and a bottom plate in the existing construction, a set of pile head secondary forming tool type mould is designed, a bottom groove and a reserved groove located on the side wall of the bottom groove can be formed around the root of the pile head after construction forming, therefore, a delayed coagulation type water-swelling water stop bar can be installed in the formed reserved groove, the bottom groove is sealed by waterproof mortar, the waterproof construction is sealed by sealing paste until the pile head is positioned, the leakage-proof safety coefficient of a pile body and the bottom plate connecting position is increased, the leakage risks and hidden dangers existing in the waterproof construction of the pile head are effectively prevented, the secondary repair cost of the pile head due to the leakage is reduced, resources are saved, the construction quality of the secondary forming construction of the pile head and the waterproof construction quality of the pile head are improved, and the popularization and usability.
As a preferable scheme, in the process of assembling the mold in step S2, the bottom opening of the mold outer ring needs to be aligned with the bottom opening of the mold inner ring, and the mold inner ring and the mold outer ring are assembled into a whole through the needle-point-shaped bolts and the nuts, so that the mold inner ring is convenient to detach and quick and convenient to install, the mold inner ring and the mold outer ring can be integrally fixed and stable, the needle-point-shaped bolts can be directly inserted into the foundation soil to integrally and stably fix the mold on the foundation soil, and the fixation and stability of the mold and the foundation soil are realized.
As a preferred scheme, the inner ring-shaped member and the outer ring-shaped member are both made of steel plates with the thickness of 2-3 mm, and the height of the inner ring-shaped member is designed to be 240-260 mm, so that the bottom groove forming effect of filling waterproof mortar in the later period is guaranteed.
Preferably, after the mold is removed in step S6, the cross-sectional dimension of the preformed groove along the axial direction of the mold is 50mm × 30mm, so as to ensure the installation effect of the expansion water stop strip.
Preferably, the construction method further includes step S8, performing waterproof construction of the floor: a gap of 1-2 cm is reserved between the waterproof construction position of the bottom plate and the pile body.
Preferably, the construction method further comprises a step S9 of performing pile head cement-based infiltration crystallization construction: and cleaning dust on the top and four sides of the pile head, watering and wetting, coating cement-based infiltration crystals, wherein the top and four sides of the pile head are fully coated, and the cement-based infiltration crystals extend to the positions of 1-2 cm reserved for water prevention of bottom plates on the four sides.
Preferably, in step S9, the method further includes installing a plastic cement joint-filling tool type mold, and installing a plastic cement joint-filling tool type mold at the lower end of the steel bar of the pile body exposed out of each pile head, so as to fill the waterproof cement with the plastic cement joint-filling tool type mold.
Preferably, the plastic ointment seam filling tool type die is of a round table structure, an oil filling hole is formed in the middle of the die, and an ointment sinking groove sunken towards the inner side wall is formed in the middle of the oil filling hole and used for filling waterproof ointment; the bottom of the plastic factice joint-pouring tool type mould oil pouring hole is fixed with a flexible broken plastic petal, so that the pile body steel bar can penetrate through the broken gap of the plastic petal to be fixed on the pile head.
Preferably, the construction method further comprises a step S10 of filling a gap with paste between the bottom plate and the pile body: and after the mud base is subjected to osmotic crystallization and dried completely, sealing factice at the position of the waterproof intersection of the bottom plate and the pile head, which is 1-2 cm away from the waterproof intersection.
Preferably, the construction method further comprises step S11, performing concrete construction of the pile head concrete protective layer and the bottom plate waterproof protective layer: and pouring a bottom plate waterproof protective layer and a pile head cement-based permeable crystallization protective layer.
Preferably, the construction method further comprises the step of S12, performing steel bar and factice caulking on the exposed pile body: and after the construction of the bottom plate waterproof protective layer concrete is finished, performing factice caulking on the pile body reinforcing steel bar exposed out of the pile head by using the plastic factice caulking tool type mould.
As described above, the present invention has at least the following advantages over the prior art:
1. the invention is used for the pile head secondary forming tool type mould, can be manufactured by utilizing materials such as steel plates, bolts and the like which are convenient to obtain in a construction site, has simple mould manufacturing principle, convenient material obtaining and low cost, saves construction efficiency and cost, can effectively solve the technical problems of leakage risk and hidden danger existing in the waterproof cross position of the pile head and the bottom plate in the existing construction, and greatly improves the waterproof construction quality of the waterproof cross position of the pile head and the bottom plate.
2. The tool type mould for post-forming of the pile head is formed by splicing the inner mould ring and the outer mould ring, is fixed by bolts and can be repeatedly used after being disassembled, and the mould is simple in principle design, ingenious and reasonable, so that the inner mould ring and the outer mould ring are convenient to disassemble and quick and convenient to install; the pile head secondary forming adopts a stereotyped assembling die, the forming effect is excellent, and the waterproof construction quality of the pile head is ensured.
3. The invention adopts the plastic factice caulking tool type mould to carry out factice caulking on the exposed pile body reinforcing steel bar of the pile head, and can effectively achieve the purpose of leakage prevention.
4. The mould is used for waterproof construction of the pile head, the retarding water-swelling water stop strip can be arranged in the formed reserved groove, the bottom groove is sealed by waterproof mortar, the waterproof construction is carried out until the position of the pile head is sealed by sealing paste, and the sealing paste is used for sealing by painting cement base after infiltration crystallization, so that the anti-leakage safety coefficient of the joint position of the pile body and the bottom plate is increased, the leakage risk and hidden danger of the waterproof construction of the pile head are effectively prevented, the secondary repair cost of the waterproof construction of the pile head due to leakage is reduced, the resources are saved, the secondary forming construction work efficiency and the waterproof construction quality of the pile head are improved, the mould has good popularization and usability, and has wide popularization and application values in similar construction processes.
Drawings
The invention will be described by way of specific embodiments and with reference to the accompanying drawings, in which
FIG. 1 is a schematic diagram of a waterproof construction of a pile head using a tool-type mold for post-forming the pile head according to an embodiment of the present invention;
FIG. 2 is a schematic assembly diagram of a tool-type mold for post-forming pile head according to an embodiment of the present invention;
FIG. 3 is a schematic view of the inner annular member of FIG. 2 in accordance with an embodiment of the present invention;
FIG. 4 is a schematic view of the outer ring member of FIG. 2 according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of the tool-type plastic ointment joint-pouring mold of FIG. 2 according to the embodiment of the present invention;
fig. 6 is a top view of the plastic cement pouring tool mold of fig. 2 in accordance with an embodiment of the present invention.
Description of reference numerals: 1-inner ring of mould; 11-an inner annular member; 12-reserving a groove; 13-inner ring steel plate; 14-inner ring steel plate strip; 2-outer ring of mould; 21-an outer ring-shaped member; 22-outer ring steel plate; 23-outer ring steel plate strip; 3-a positioning element; 4-pile head; 5-a bottom plate; 6-bottom groove; 7-waterproof coiled material; 8-water stop bar; 9-pile body steel bars; 10-plastic ointment crack-filling tool type mould; 101-oil filling holes; 102-ointment sink tank; 103-plastic petals; 104-water stop ring.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The embodiment is substantially as shown in fig. 1 to 4: the embodiment provides a construction method for post-forming waterproof construction of a pile head, which applies a post-forming tool type mould shown in figure 2 to carry out construction at the position where the waterproof part of the pile head 4 and the waterproof part of a bottom plate 5 are crossed, and comprises the following steps:
s1, pile head breaking: after the pile head is broken, the designed elevation is reached, and loose concrete and pile body soil on the surface of the pile head are cleaned;
s2, assembling the pile head secondary forming tool type mould: splicing the two semicircular inner ring-shaped members 11 into an inner mold ring 1, splicing the two semicircular outer ring-shaped members 21 into an outer mold ring 2, and finally splicing the inner mold ring 1 and the outer mold ring 2 into an integral mold with a reserved groove 12; in the process of assembling the mold in the step S2, the bottom opening of the mold outer ring 2 needs to be aligned with the bottom opening of the mold inner ring 1, and the mold inner ring 1 and the mold outer ring 2 are assembled into a whole through the needle-point bolt and the nut, so that the mold inner ring 1 is convenient to disassemble and is fast and convenient to install, the mold inner ring 1 and the mold outer ring 2 can be integrally and stably fixed, and the needle-point bolt can be directly inserted into the foundation soil to integrally and stably fix the mold on the foundation soil, so that the mold and the foundation soil can be stably fixed;
preferably, the inner annular member 11 and the outer annular member 21 are both made of steel plates with a thickness of 2-3 mm, and the height of the inner annular member 11 is designed to be 240-260 mm, so as to ensure the forming effect of the bottom groove 6 filled with waterproof mortar at the later stage;
s3, die mounting: the assembled mould is directly sleeved on the pile body of the pile head from the pile head, and the inner ring 1 of the mould is directly fixed on the foundation soil of the foundation through a needle-point bolt arranged at the bottom of the inner ring;
s4, pile head secondary forming and cushion concrete pouring: synchronously pouring the pile head enlarged part and the bottom plate cushion layer concrete;
s5, removing the die: after the secondary forming construction of the pile head is completed, firstly removing the outer ring 2 of the mould and then removing the inner ring 1 of the mould, and after the mould is removed, forming a bottom groove 6 and a reserved groove 12 positioned on the side wall of the pile body around the root of the pile head; the sectional dimension of the preformed groove 12 provided by the embodiment along the axial direction of the mold is 50mm × 30mm, so that the installation effect of the expansion water stop strip 8 can be ensured;
s6, installing an expansion water stop strip 8: a water stop strip 8 with water expansibility is arranged in a groove 12 reserved on the side wall of the formed pile body and is firmly fixed;
s7, sealing the bottom groove 6 with waterproof mortar: filling the bottom groove 6 with micro-expansion waterproof mortar at the position where the bottom groove 6 is formed around the root of the pile head, and plastering and compacting;
the construction method further comprises the following step S8 of waterproof construction of the bottom plate: a gap is reserved between the waterproof construction position of the bottom plate and the pile body, and preferably, a gap of 1-2 cm is reserved between the waterproof construction position of the bottom plate and the pile body;
the construction method further comprises the step S9 of carrying out the penetration crystallization construction of the pile head cement base: cleaning dust on the top and four sides of the pile head, watering and wetting, coating cement-based infiltration crystals, wherein the top and four sides of the pile head are fully coated, and the cement-based infiltration crystals extend to the positions of 1-2 cm reserved for waterproof bottom plates on the four sides; as a preferable scheme of the step S9, the step further includes mounting a plastic cement pouring tool type mold 10, mounting the plastic cement pouring tool type mold 10 at the lower end of the pile body steel bar 9 exposed out of each pile head, and filling the waterproof cement with the plastic cement pouring tool type mold 10; specifically, as shown in fig. 5 and fig. 6, the plastic ointment crack pouring tool type mold 10 provided in this embodiment is a circular truncated cone structure, and an oil pouring hole 101 is formed in the middle of the mold, and an ointment sinking groove 102 recessed toward the inner side wall is formed in the middle of the oil pouring hole 101 and is used for filling waterproof ointment; flexible broken plastic petals 103 are fixed at the bottom of the oil filling hole 101 of the plastic factice joint filling tool type mould 10, so that the pile body reinforcing steel bars 9 can penetrate through the broken gaps of the plastic petals 103 and are fixed on the pile head; a water stop ring 104 with the width of at least 10mm and the thickness of 1mm is also arranged on the outer side wall of the plastic ointment crack pouring tool type mould 10;
the construction method further comprises a step S10, adopting factice for caulking the seam between the bottom plate and the pile body: after the mud base is subjected to osmotic crystallization and dried completely, sealing factice from the waterproof position of the bottom plate to the position of 1-2 cm of the waterproof intersection of the pile head;
the construction method also comprises the step S11 of constructing the pile head concrete protective layer and the bottom plate waterproof protective layer: sealing and firmly bonding the waterproof coiled material 7 and the pile head joint part by using sealant around the root part of the pile head to form a bottom plate waterproof layer, and pouring a bottom plate waterproof protective layer and a pile head cement-based permeable crystallization protective layer; the waterproof roll material 7 and the pile head base surface form an integrated structure while better bonding is guaranteed, so that leakage points at the root of the pile head are prevented, and the engineering construction quality is guaranteed.
The construction method further comprises a step S12 of caulking the exposed pile body by steel bars and paste: after the construction of the bottom plate waterproof protective layer concrete is completed, the plastic ointment caulking tool type mould 10 is utilized to carry out ointment caulking on the pile head exposed pile body reinforcing steel bars 9, and finally the steps are completed, so that the construction of the bearing platform, the bottom plate and the raft plate reinforcing steel bars can be carried out.
On the other hand, in this embodiment, fig. 2 is an assembly schematic diagram of a tool-type mold for secondary forming of a pile head according to an embodiment of the present invention, and according to the present invention, the embodiment further provides a tool-type mold for secondary forming of a pile head, which is applied to waterproof construction at a position where a waterproof part of a pile head and a waterproof part of a bottom plate intersect, the mold comprises an inner mold ring 1 and an outer mold ring 2, the inner mold ring 1 is assembled by two identical semicircular inner ring-shaped members 11 along axial side walls thereof, the assembled inner mold ring 1 provided in this embodiment is 100mm larger than the pile head, the assembled inner mold ring 1 is sleeved on a pile body of the pile head during construction, fig. 3 shows a schematic diagram of a single inner ring-shaped member 11, the inner ring-shaped member 11 is made of a 3mm steel plate, in consideration of waterproof treatment of a surface after pile breaking, the embodiment designs a height of the inner and outer ring-shaped members to be 250mm, a 50mm ×, the reserved groove 12 is sunken by the outside lateral side of interior annular structure near its central axis line, and the reserved groove 12 is used for installing sealing rod 8 behind pile head post forming, and its dimensional design is used for guaranteeing that 8 installation processes of later stage sealing rod are convenient for implement.
The mold outer ring 2 provided in this embodiment is formed by assembling two semicircular outer ring-shaped members 21 along the axial side walls thereof, so that the bottom opening of the outer ring 2 is aligned with the bottom opening of the inner ring 1, including both bottom openings being horizontally aligned and both openings having the same axial line, figure 4 shows a schematic view of a single outer ring member 21, an outer ring steel plate 22 extending to one side of the inner ring member 11 is welded to the bottom of each of the two outer ring members 21, the bottom parts of the two inner ring-shaped components 11 are welded with an inner ring steel plate 13 extending to one side of the outer ring-shaped component 21, so that the inner ring steel plate 13 and the outer ring steel plate 22 are overlapped with each other and fixed on the foundation soil of the foundation through the positioning piece 3 to realize the assembly between the inner ring 1 and the outer ring 2 of the mold, so that a bottom groove 6 is formed around the root of the pile head after the pile head is formed for filling waterproof mortar.
From top to bottom, this embodiment has the technical problem of seepage risk and hidden danger to pile head and the waterproof cross location of bottom plate in current construction, one set of pile head post forming instrument formula mould has been designed, it can form bottom recess 6 and be located the reserve groove 12 of bottom recess 6 lateral wall around the pile head root after the construction shaping, can install the water swelling sealing rod 8 of delayed coagulation type in fashioned reserve groove 12 from this, and adopt waterproof mortar to seal bottom recess 6, waterproof construction adopts the sealing paste to seal to the pile head position, and adopt to apply paint cement base infiltration crystallization with a brush and utilize the oleamen to seal after, pile body and bottom plate handing-over position antiseep factor of safety has been increased, prevent seepage risk and hidden danger that pile head waterproof construction exists effectively.
In order to realize the assembly, fixation and stability of the two inner ring-shaped members 11, in the embodiment, the inner ring steel slabs 14 with the width of 50mm are correspondingly welded at the end parts of the assembly parts of the two inner ring-shaped members 11, so that the two inner ring-shaped members 11 are fixedly connected through the arranged inner ring steel slabs 14, specifically, 3 circular holes with the diameter of 12mm are correspondingly arranged on the inner ring steel slabs 14 of the two inner ring-shaped members 11, and respectively penetrate through the circular holes through bolts so that the two inner ring-shaped members are connected and assembled into a whole, the structural principle of the inner ring 1 of the die is simple, ingenious and reasonable in design, so that the inner ring 1 of the die is convenient to disassemble and fast and convenient to install, and the inner ring 1 of the die is; meanwhile, the inner ring steel plate strips 14 are arranged to avoid the reserved grooves 12, so that the reserved grooves 12 in the middle parts of the two inner ring-shaped members 11 are communicated with each other; by adopting the structure, the mutual communication of the reserved grooves 12 for installing the water stop bars 8 can be realized, the inner annular component 11 is convenient to assemble and fix, and the disassembly and the installation are convenient.
The two outer ring members 21 provided in this embodiment have their annular side walls inclined so that the inner diameter of the mold outer ring 2 gradually increases from the bottom to the top thereof, preferably, the annular side walls of the outer ring members 21 are inclined at 45 ° to 60 ° along the central axial line thereof, and in this embodiment, the annular side walls of the outer ring members 21 are inclined at 45 ° along the axial line thereof, for example, the bottom groove 6 formed around the root of the pile head by the mold has its outer side wall surface inclined from the bottom to the top thereof, so that the waterproof construction quality of the pile head can be further improved after filling the waterproof mortar, so as to ensure the excellent forming effect of the bottom groove 6,
for realizing that two outer loop type members 21 assemble fixedly stable, this embodiment corresponds the outer loop steel sheet strip 23 that has the welding of 50mm width at two outer loop type member 21's the department of assembling tip, so that two outer loop type members 21 are through the outer loop steel sheet strip 23 fixed connection who sets up, concretely, it is 12mm round holes to correspond to be provided with 3 diameters on two outer loop type member 21's outer loop steel sheet strip 23, and pass the round hole so that two outer loop type members connect the concatenation to become whole through the bolt respectively, 2 structural principle designs simply but ingenious rationality outside this mould on the same principle, so that 2 convenient to detach outside mould ring, the installation is swift convenient, adopt the bolt fastening, repeatedly usable after the dismantlement.
In order to realize the assembly and fixation stability of the inner ring 1 and the outer ring 2 of the mold, the positioning element 3 provided by the embodiment comprises a needle-point-shaped bolt and a nut, the widths of the inner ring steel plate 13 and the outer ring steel plate 22 are more than or equal to 50mm, the materials of the inner ring steel plate 11 and the outer ring steel plate 21 are both steel plates, and the thicknesses of the steel plates are 2-3 mm, as the optimization of the embodiment, the outer ring steel plate 22 provided by the embodiment is made of steel plates with the widths of 50mm and the thicknesses of 3mm, the inner ring steel plate 13 is made of steel plates with the widths of 50mm and the thicknesses of 3mm, the width size design of the inner ring steel plate 13 and the outer ring steel plate 22 considers the integral fixation stability of the inner ring 1 and the outer ring 2 of the mold on one hand, and; further, round holes matched with the needle-point-shaped bolts are correspondingly formed in the inner ring steel plate 13 and the outer ring steel plate 22, so that the needle-point-shaped bolts penetrate through the round holes and the nuts are used for fixing the inner ring steel plate 13 and the outer ring steel plate 22 on the foundation soil of the foundation; by adopting the structure, the die inner ring 1 and the die outer ring 2 can be integrally fixed and stable, and the die can be integrally and stably fixed on the foundation soil by directly inserting the needle-point-shaped bolt into the foundation soil, so that the die and the foundation soil are stably fixed.
In conclusion, the waterproof construction method for the pile head is used for the secondary forming tool type mould of the pile head to carry out waterproof construction of the pile head, and can effectively solve the technical problems that leakage risks and hidden dangers exist at the waterproof cross position of the pile head and the bottom plate in the existing construction, so that the waterproof construction quality of the waterproof cross position of the pile head and the bottom plate is greatly improved, the delayed coagulation type water-swelling water stop bar 8 can be arranged in the formed reserved groove 12, the bottom groove 6 is sealed by waterproof mortar, the waterproof construction is sealed by sealing paste until the pile head position is reached, and the leakage safety coefficient of the pile body and the bottom plate at the joint position is increased; and the pile head adopts the plastic factice caulking tool type mould to carry out factice caulking on the pile body reinforcing steel bar exposed out of the pile head after the cement base is coated for infiltration crystallization, so that the aim of preventing leakage can be effectively fulfilled.
The foregoing basic embodiments of the invention and their various further alternatives can be freely combined to form multiple embodiments, all of which are contemplated and claimed herein. In the scheme of the invention, each selection example can be combined with any other basic example and selection example at will.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A construction method for post-forming waterproof construction of pile heads is characterized by comprising the following steps: the construction method is implemented at the position where the pile head is waterproof and the bottom plate is waterproof by applying the pile head secondary forming tool type mould, and comprises the following steps:
s1, pile head breaking: after the pile head is broken, the designed elevation is reached, and loose concrete and pile body soil on the surface of the pile head are cleaned;
s2, assembling the pile head secondary forming tool type mould: splicing the two semicircular inner ring-shaped components into an inner ring of the die, splicing the two semicircular outer ring-shaped components into an outer ring of the die, and finally splicing the inner ring of the die and the outer ring of the die into a whole die with a reserved groove;
s3, die mounting: the assembled mould is directly sleeved on the pile body of the pile head from the pile head, and the inner ring of the mould is directly fixed on the foundation soil of the foundation through a needle-point bolt arranged at the bottom of the inner ring;
s4, pile head secondary forming and cushion concrete pouring: synchronously pouring the pile head enlarged part and the bottom plate cushion layer concrete;
s5, removing the die: after the secondary forming construction of the pile head is completed, firstly removing the outer ring of the mould and then removing the inner ring of the mould, and after the mould is removed, forming a bottom groove and a reserved groove positioned on the side wall of the pile body around the root of the pile head;
s6, installing an expansion water stop strip: a water stopping strip which swells when meeting water is arranged in a groove reserved on the side wall of the formed pile body and is firmly fixed;
s7, sealing bottom groove waterproof mortar: and filling the bottom groove with micro-expansion waterproof mortar and plastering and compacting the bottom groove at the position where the bottom groove is formed around the root of the pile head.
2. The construction method for post-forming waterproof construction of a pile head according to claim 1, characterized in that: in the process of assembling the die in the step S2, the bottom opening of the outer ring of the die needs to be aligned with the bottom opening of the inner ring of the die, and the inner ring of the die and the outer ring of the die need to be assembled into a whole through the pinpoint-shaped bolt and the nut.
3. The construction method for post-forming waterproof construction of a pile head according to claim 1, characterized in that: the inner ring-shaped member and the outer ring-shaped member are both made of steel plates with the thickness of 2-3 mm, and the height of the inner ring-shaped member is designed to be 240-260 mm.
4. The construction method for post-forming waterproof construction of a pile head according to claim 1, characterized in that: the construction method further comprises a step S8 of performing waterproof construction of the bottom plate: a gap of 1-2 cm is reserved between the waterproof construction position of the bottom plate and the pile body.
5. The construction method for post-forming waterproof construction of a pile head according to claim 4, wherein: the construction method further comprises the step S9 of carrying out pile head cement-based infiltration crystallization construction: and cleaning dust on the top and four sides of the pile head, watering and wetting, coating cement-based infiltration crystals, wherein the top and four sides of the pile head are fully coated, and the cement-based infiltration crystals extend to the positions of 1-2 cm reserved for water prevention of bottom plates on the four sides.
6. The construction method for post-forming waterproof construction of a pile head according to claim 5, wherein: in step S9, a plastic cement joint-filling tool-type mold is further installed, and a plastic cement joint-filling tool-type mold is installed at the lower end of the exposed pile body steel bar of each pile head, so that waterproof cement is filled in the plastic cement joint-filling tool-type mold.
7. The construction method for post-forming waterproof construction of a pile head according to claim 6, wherein: the plastic ointment seam filling tool type mould is of a round platform structure, an oil filling hole is formed in the middle of the mould, and an ointment sinking groove which is sunken towards the inner side wall is formed in the middle of the oil filling hole and used for filling waterproof ointment; the bottom of the plastic factice joint-pouring tool type mould oil pouring hole is fixed with a flexible broken plastic petal, so that the pile body steel bar can penetrate through the broken gap of the plastic petal to be fixed on the pile head.
8. The construction method for post-forming waterproof construction of a pile head according to claim 6, wherein: the construction method further comprises a step S10 of filling a gap with factice between the bottom plate and the pile body: and (3) after the cement-based infiltration crystallization is dried completely, sealing factice at the position of the waterproof intersection of the bottom plate and the pile head by 1-2 cm.
9. The construction method for post-forming waterproof construction of a pile head according to claim 8, wherein: the construction method also comprises the step S11 of constructing the pile head concrete protective layer and the bottom plate waterproof protective layer: and pouring a bottom plate waterproof protective layer and a pile head cement-based permeable crystallization protective layer.
10. The construction method for post-forming waterproof construction of a pile head according to claim 9, wherein: the construction method further comprises S12, steel bar, factice and caulking are carried out on the exposed pile body: and after the construction of the bottom plate waterproof protective layer concrete is finished, performing factice caulking on the pile body reinforcing steel bar exposed out of the pile head by using the plastic factice caulking tool type mould.
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