CN106948340A - A kind of construction method of the Manual excavated pile structure of high polymer grouting protection - Google Patents

A kind of construction method of the Manual excavated pile structure of high polymer grouting protection Download PDF

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Publication number
CN106948340A
CN106948340A CN201710213738.XA CN201710213738A CN106948340A CN 106948340 A CN106948340 A CN 106948340A CN 201710213738 A CN201710213738 A CN 201710213738A CN 106948340 A CN106948340 A CN 106948340A
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China
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grouting
polymer
waterproof
construction
reinforcement
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CN106948340B (en
Inventor
刘凯
陆添阳
卢林
程明
朱升晖
陈蕾
李�浩
尹立伟
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Huangshan Development Investment Group Co.,Ltd.
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Hefei University of Technology
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Priority to CN201510818261.9A priority Critical patent/CN105464074B/en
Priority to CN201710213738.XA priority patent/CN106948340B/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/38Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E02D15/04Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00Production methods
    • E02D2250/003Injection of material

Abstract

The present invention relates to a kind of construction method of the Manual excavated pile structure of high polymer grouting protection, it is characterized in that it is the waterproof support circle formed by high polymer grouting to set stake holes hole wall;Slip casing by pressure ring is configured at the top of waterproof support circle, the reinforcement post formed by high polymer grouting is distributed with the periphery of waterproof support circle;In section of being backbreak in the bottom of stake holes, with lime place mat formation Lime Stabilization layer, pave graded broken stone formation breakstone water-proof layer on Lime Stabilization layer, slip casing by pressure plate is fixedly mounted in the top surface of breakstone water-proof layer, high polymer grouting liquid is injected by the bottom injected hole opened up on slip casing by pressure plate and permeated in the space of graded broken stone, expansion curing formation waterproof base plate.The present invention takes into account bottom and side wall waterproof, peripheral supporting reinforcement by the way that the waterproof in construction and retaining wall work are shifted to an earlier date, and technique is simple, low engineering cost;Caisson underground work condition is improved, it is ensured that later stage pile body construction quality and progress, with significant economic benefit and promotional value.

Description

A kind of construction method of the Manual excavated pile structure of high polymer grouting protection
The application is Application No.:2015108182619, the applying date is:20151122, it is entitled:It is a kind of artificial Caisson high polymer grouting safeguard structure and its construction method, application are artificial:Point of the application for a patent for invention of HeFei University of Technology Case application.
Technical field
The invention belongs to civil construction technical field, more particularly to artificial digging pile high polymer grouting safeguard structure and its apply Work method.
Background technology
Artificial digging pile refers to that stake holes is to carry out pore-forming using the method for hand digging, and steel reinforcement cage is laid in stake holes, then Pour into a mould concrete pile.The advantage of artificial digging pile:
One is that operating space requires small, easy construction, and speed of application is very fast, and technique is simple, it is not necessary to heavy mechanical equipment;
Two be stronger than the shock resistance of timber and concrete driven pile, than impact cone punching, convolution drill hole of drilling machine And the cost such as well foundation is lower, and noiseless etc.;
Three be that artificial digging pile does not produce mud, is conducive to civilized environmental protection construction and reduces the ambient influnence of surrounding.Building Build in construction, when because of site condition and geological conditions limitation, artificial digging pile is become as main form of construction work.
Caisson underground work condition is poor, bad environments, labor intensity are big, and some detailed problems are all in practice of construction management Construction speed can be caused to be delayed, construction quality and safety cannot be guaranteed.Following three points are should be noted in manual digging pile construction: One is when digging deep about one meter, it is necessary to pour into a mould plan analysis.In addition to intercepting ditch is dug in earth's surface pier position surrounding, device to hole is also answered The appropriate drainage of water outside interior tap is away from stake holes;Two be that, in poured pile base concrete, such as several stake holes are only oozed on a small quantity Water, should take measures to irrigate simultaneously, in order to avoid concentrate a hole more difficult in water.Such as porous amount is big, influences pouring quality, It should then concentrate and draw water in a hole, reduce other each hole water levels, suction eye finally uses Placement of Underwater Concrete for Casting;Three be borehole Reach after designed elevation, bottom hole processing should be carried out, it is necessary to accomplish it is smooth, without soft formations such as loose slag, sludge and precipitations.
In the prior art, the existing subject matter of the borehole construction of artificial digging pile includes:
First, when retaining wall takes power consumption;When artificial digging pile cutting depth often reaches 1.0m, it is intended to using being not less than pile body coagulation The concrete of native intensity carries out retaining wall, treats that retaining wall reaches that intensity requirement rear can proceed with borehole construction, process it is cumbersome, it is necessary to Material working tool amount is big, and workman's amount of labour is big, and transport of materials stacks inconvenient, and material consumption is larger, result in long in time limit, and increases Construction costs.
2nd, working security is poor;Work as rich groundwater, when foundation soil is infiltration coefficient larger soil layer, if can not bear Water, earth lateral pressure, dewatering measure is not taken in time, infiltration is easily occurred, is gushed mud phenomenon, causes hole wall collapse;Due in stake holes Many water, humidity, and construction surface is narrower, if breakage etc. occurs in the electric wire of the ventilation equipment used, lighting apparatus, easily gets an electric shock Accident.
3rd, bottom hole ponding;Due to the multiple pile foundations of requirement of engineering, after the completion of the borehole construction of an artificial digging pile, Tend not to carry out pile body in time to fill, need to wait for borehole construction and be fully completed to carry out pile body and filling, therefore bottom hole is easy Generation ponding, operation of drawing water, influence construction quality and construction speed will be also carried out again when pile body is filled.
High polymer grouting is the foundation rapid reinforcement technology grown up 1970s.The technology is by ground Many component high polymer materials are injected in base, rapid spatial expansion and the spy solidified after being chemically reacted using high polymer material Property, reach consolidated subsoil, fill the purpose for coming to nothing or being lifted floor.At present, the production of high polymer grouting material and application Rapid to expand and promote, high polymer grouting technology plays more and more important in the development of national economy every field Effect, is mainly used in foundation stabilization and road maintenance of the industry with civil buildings, especially minimally invasive in subgrade and pavement in recent years Maintenance in repairing with having obtained good application.At present, the domestic phase that yet there are no artificial digging pile high polymer grouting guard technology Close report.
The content of the invention
The present invention is that there is provided a kind of technique is simple, operability to avoid the weak point present in above-mentioned prior art The construction method of the Manual excavated pile structure of strong high polymer grouting protection, by fulfiling waterproof and shield in work progress ahead of schedule Wall works, and improves caisson underground work condition, reduces the labor intensity of workmen, to improve efficiency, and ensures artificial The construction quality and construction safety of caisson.
The present invention adopts the following technical scheme that to solve technical problem:
The characteristics of artificial digging pile high polymer grouting safeguard structure of the present invention is:It is by high polymer grouting to set stake holes hole wall The waterproof support circle of formation;The slip casing by pressure ring with guard ring injected hole is configured with the top of waterproof support circle, in waterproof branch The periphery of guard ring, is circumferentially intervally distributed with the reinforcement post formed by high polymer grouting;In section of being backbreak in the bottom of stake holes, with stone Grey place mat formation Lime Stabilization layer, pave graded broken stone formation breakstone water-proof layer on Lime Stabilization layer, in the breakstone water-proof Slip casing by pressure plate is fixedly mounted by expansion bolt in the top surface of layer, and bottom injected hole is offered on the slip casing by pressure plate, is led to The high polymer grouting liquid for crossing bottom injected hole injection is permeated in the space of graded broken stone, and expansion curing formation waterproof base plate.
The characteristics of artificial digging pile high polymer grouting safeguard structure of the present invention, lies also in:
The thickness of the waterproof support circle is 4~10cm;The reinforcement post be in the periphery 60 of waterproof support circle~ At 100cm position.
The thickness of the Lime Stabilization layer is 20~30cm, and the thickness of the breakstone water-proof layer is 35~50cm.
The characteristics of construction method of artificial digging pile high polymer grouting safeguard structure of the present invention is to carry out as follows:
Step 1:By the prefabricated guard ring steel pipe of caisson drilling diameter, by the protection on the position coaxial with caisson Circle steel pipe merogenesis gradually vibrates or static pressure is sunk in soil, in embedded depth 80~100cm bigger than artificial digging pile projected depth, The toroidal cavity that guard ring steel pipe formation thickness is 4~10cm is removed, toroidal cavity, the pressure are blocked up using slip casing by pressure ring seal Slip casting ring counterweight is fixed on the ground, with each guard ring injected hole of 30~50cm interval setting on the slip casing by pressure ring, Connect guard ring Grouting Pipe respectively on each guard ring injected hole, the other end of each guard ring Grouting Pipe is connected with slip casting linker Logical, the top center of the slip casting linker is provided with grouting port, injects height into the toroidal cavity by the grouting port Polymers slurry;
Step 2:It is vertical using rig at the periphery of guard ring steel pipe, 60~100cm of distance protection circle steel pipe position Construction reinforcement injected hole, the spacing of the reinforcement injected hole is 40~60cm, if containing loose soil bed, drifting sand layer or high compression Property mud adverse geological condition, reinforcement slip casting hole depth be not less than caisson projected depth, otherwise then depth not less than dig The 2/3 of hole stake projected depth, is blocked, the slip casing by pressure orifice plate is matched somebody with somebody in reinforcement injected hole top surface using slip casing by pressure orifice plate Fix on the ground again, reinforced opening Grouting Pipe inserted in the central through hole of slip casing by pressure orifice plate, by reinforced opening Grouting Pipe to High polymer slurry is injected in the reinforcement injected hole;
Step 3:Grouting sequence is determined according to geology survey data, if containing loose soil bed, drifting sand layer or high-compressibility The adverse geological condition of mud, then be introduced into the mortar depositing construction that step 4 carries out reinforcement injected hole, enter back into step 5 and prevented Water support circle mortar depositing construction;Otherwise then it is introduced into step 5 and carries out waterproof support circle mortar depositing construction, enters back into step 4 and carry out reinforcement Injected hole mortar depositing construction;
Step 4:High polymer grouting is carried out by reinforcement Grouting Pipe, injection slurry expands rapidly reaction, spread to surrounding Until being fully filled with reinforcement injected hole and its surrounding soil space, and solidifying and setting formation reinforcement cylinder therewith;
Step 5:High polymer grouting is carried out by guard ring Grouting Pipe and linker, injection slurry expands rapidly reaction, To surrounding diffusion until being fully filled with toroidal cavity and its surrounding soil space, therewith solidifying and setting and couple form waterproof supporting Circle, slip casting clears up slip casting linker after terminating;
Step 6:Borehole is carried out by stake holes projected depth in waterproof support circle, and continuation is backbreak downwards in stake holes bottom, Backbreak when reaching projected depth, drain bottom hole ponding, pave and hand compaction forms Lime Stabilization layer, on Lime Stabilization layer The even graded broken stone formation breakstone water-proof layer that paves;Slip casing by pressure is fixedly mounted by expansion bolt in the top surface of breakstone water-proof layer Plate, bottom injected hole is offered on the slip casing by pressure plate, is carried out high polymer grouting by bottom injected hole, is noted high polymer Slurry infiltration is in the space of graded broken stone, expansion curing therewith, forms bottom waterproof base plate, and with side wall waterproof support circle structure It is overall into a waterproof cylinder.
The characteristics of construction method of the present invention, lies also in:Determine as follows in single reinforcement injected hole and waterproof support circle The consumption of high polymer slurry, the high polymer slurry refers to the still unreacted slurry being in a liquid state, and is with raw material A and raw material B etc. Volume mixture is formed, and the mass M of high polymer slurry is:
Wherein, V1The volume of high polymer slurry used by single reinforcement injected hole or waterproof support circle;
ρ2For the density of raw material A;ρ3For raw material B density;ρ1For the hybrid density of high polymer slurry;According to the principle of mass conservation before and after high polymer slurry reaction, have:M=a ρ4V21V1
Wherein, V2For the cavity volume of single injected hole or waterproof support circle, ρ4Density is freely sent out for high polymer slurry;
A is that waterproof irrigates coefficient, and it is 1.5~4.0 to need to take a according to different waterproofs;
Then have:
Compared with the prior art, the present invention has the beneficial effect that:
1st, waterproof support circle effect is set to prevent the infiltration of work progress middle hole wall, gush the hair of mud and phenomenon of caving in the present invention It is raw, while greatly improving caisson underground work condition, the labor intensity of workmen is reduced, the smooth of construction has been ensured Progress and the security of the lives and property of workmen;
2nd, the present invention is not before pile foundation is excavated, and periphery sets reinforcement post, is close to artificial stake periphery formation waterproof support circle, has Effect has consolidated caisson surrounding soil, reduces the possibility of soil body local buckling during excavation pile construction, improves waterproof The supporting intensity and water resistance of support circle, significantly reduce the danger of construction;
3rd, the present invention backbreak in stake holes bottom after set breakstone water-proof layer, effectively prevent borehole construction after the completion of, not and The bottom hole ponding problem that Shi Jinhang pile bodies are filled and caused, it is ensured that construction quality and construction speed that later stage pile body is filled, peace It is complete reliable, it is simple to operate.
4th, the waterproof support circle that the present invention is formed by high polymer grouting is the construction carried out earlier than artificial digging pile, in advance Complete the waterproof in work progress and retaining wall work, it is not necessary to carry out concrete guard wall again, can directly construct to caisson Designed elevation, eliminates concrete construction and maintenance processes, and technique is simple, is easy to rapid construction, significantly reduces construction costs;
5th, the present invention can according to engineering fact calculate needed for grouting amount, it is to avoid blindness slip casting causes the wasting of resources, maximum The block-water effect of the guarantee waterproof branch sheath of degree, improves the stability in caisson later stage, with significant economic benefit and pushing away Wide value;
6th, the present invention determines grouting sequence according to unfavorable geology is whether there is, any in the construction that breaks traditions to arrange difference in functionality The grouting sequence of injected hole, scientific and reasonable completion high polymer grouting construction, has preferably played the effect of each functional layer.
Brief description of the drawings
Fig. 1 is artificial digging pile safeguard structure plan of the present invention;
Fig. 2 is artificial digging pile safeguard structure stereogram of the present invention;
Fig. 3 is safeguard structure elevational schematic view of the present invention;
Fig. 4 is slip casting linker structural representation of the present invention;
Fig. 5 is the structural representation of slip casing by pressure plate of the present invention;
Label in figure:1 waterproof support circle, 2 reinforcement posts, 3 Lime Stabilizations layer, 4 breakstone water-proofs layer, 5 slip casing by pressure plates, 6 bottoms Portion's injected hole, 7 artificial digging piles, 8 ground, 9 guard ring Grouting Pipes, 10 slip casing by pressure rings, 11 guard ring injected holes, 12 slip castings connect Logical device.
Embodiment
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, artificial digging pile high polymer grouting safeguard structure is to set in the present embodiment Stake holes hole wall is the waterproof support circle 1 formed by high polymer grouting;Band guard ring slip casting is configured with the top of waterproof support circle 1 The slip casing by pressure ring 10 in hole 11, in the periphery of waterproof support circle 1, is circumferentially intervally distributed with the reinforcement formed by high polymer grouting Post 2;In section of being backbreak in the bottom of stake holes, with lime place mat formation Lime Stabilization layer 3, the level that paved on Lime Stabilization layer 3 is with broken Stone formation breakstone water-proof layer 4, by expansion bolt is fixedly mounted slip casing by pressure plate 5, in pressure note in the top surface of breakstone water-proof layer 4 Bottom injected hole 6 is offered on pulpboard 5, the high polymer grouting liquid injected by bottom injected hole 6 permeates the sky in graded broken stone In gap, and expansion curing forms waterproof base plate, and waterproof support circle 1 can effectively prevent the infiltration of work progress middle hole wall, gush mud and collapse The generation for phenomenon of collapsing, improves caisson underground work condition;Reinforcement post 2 has effectively consolidated caisson surrounding soil, reduces digging The possibility of soil body local buckling during the pile driving construction of hole, reduces the danger of construction;In specific implementation, waterproof support circle 1 Thickness be 4~10cm;Reinforcement post 2 is at 60~100cm of the periphery position of waterproof support circle 1;Lime Stabilization layer 3 Thickness is 20~30cm, and the thickness of breakstone water-proof layer 4 is 35~50cm.
As shown in figure 5, slip casing by pressure plate 5 is the circular stainless-steel sheet assembled by 4~8 pieces of fanning strip splicings, fan The thickness of shape plate is to be welded to connect between 10~15mm, each fanning strip, and fixing hole and bottom injected hole are set respectively in fanning strip 6, expansion bolt is through fixing hole until Lime Stabilization less than 3 60cm depths of layer, implement the fixed installation of slip casing by pressure plate 5.
The material of Lime Stabilization layer is to form lime with sandy soil or cohesive soil mix, and both are uniform in the mix of ground 8 After deliver to bottom hole and be used to construct, the incorporation of lime is the 5%~7% of Lime Stabilization layer material by weight percentage;High polymer Grout material is non-aqueous reaction class, water non-sensitive type, double-component foaming body closed-cell materials, and its grouting pressure is 15~30MPa.
The construction method of artificial digging pile high polymer grouting safeguard structure is to carry out as follows in the present embodiment:
Step 1:By the prefabricated guard ring steel pipe of caisson drilling diameter, by guard ring steel on the position coaxial with caisson Pipe merogenesis is gradually vibrated or static pressure is sunk in soil, in embedded depth 80~100cm bigger than the projected depth of artificial digging pile 7, is moved Except the toroidal cavity that guard ring steel pipe formation thickness is 4~10cm, toroidal cavity, slip casing by pressure ring are blocked up using slip casing by pressure ring seal Counterweight is fixed on the ground, with each guard ring injected hole of 30~50cm interval setting on slip casing by pressure ring, in each guard ring Guard ring Grouting Pipe 9 is connected on injected hole respectively, the other end of each guard ring Grouting Pipe 9 is connected with slip casting linker 12, noted The top center of slurry linker 12 is provided with grouting port, and high polymer slurry is injected into toroidal cavity by grouting port.
Step 2:It is vertical using rig at the periphery of guard ring steel pipe, 60~100cm of distance protection circle steel pipe position Construction reinforcement injected hole, the spacing of reinforcement injected hole is 40~60cm, if being become silted up containing loose soil bed, drifting sand layer or high-compressibility The adverse geological condition of mud layer, reinforcement slip casting hole depth is not less than caisson projected depth, otherwise then depth is not less than caisson The 2/3 of projected depth, is blocked in reinforcement injected hole top surface using slip casing by pressure orifice plate, and slip casing by pressure orifice plate counterweight is fixed on On ground, reinforced opening Grouting Pipe is inserted in the central through hole of slip casing by pressure orifice plate, by reinforced opening Grouting Pipe to reinforcement slip casting High polymer slurry is injected in hole.
The consumption of high polymer slurry in single reinforcement injected hole and waterproof support circle, high polymer slurry are determined as follows Refer to the slurry being in a liquid state not reacted still, mixed in equal volume with raw material B with raw material A, the mass M of high polymer slurry For:
Wherein, V1The volume of high polymer slurry used by single reinforcement injected hole or waterproof support circle;
ρ2For the density of raw material A;ρ3For raw material B density;ρ1For the hybrid density of high polymer slurry;According to the principle of mass conservation before and after high polymer slurry reaction, have:M=a ρ4V21V1
Wherein, V2For the cavity volume of single injected hole or waterproof support circle, ρ4Density is freely sent out for high polymer slurry;
A is that waterproof irrigates coefficient, and it is 1.5~4.0 to need to take a according to different waterproofs;
Then have:
In construction, the grouting amount according to needed for being calculated engineering fact, it is to avoid blindness slip casting causes the wasting of resources, at utmost Ground ensure that block-water effect, improve the stability in caisson later stage.
Step 3:Grouting sequence is determined according to geology survey data, if containing loose soil bed, drifting sand layer or high-compressibility The adverse geological condition of mud, then be introduced into the mortar depositing construction that step 4 carries out reinforcement injected hole, enter back into step 5 and prevented Water support circle mortar depositing construction;Otherwise then it is introduced into step 5 and carries out waterproof support circle mortar depositing construction, enters back into step 4 and carry out reinforcement Injected hole mortar depositing construction.
Step 4:High polymer grouting is carried out by reinforcement Grouting Pipe, injection slurry expands rapidly reaction, spread to surrounding Until being fully filled with reinforcement injected hole and its surrounding soil space, and solidifying and setting formation reinforcement cylinder therewith.
Step 5:High polymer grouting is carried out by guard ring Grouting Pipe and linker, injection slurry expands rapidly reaction, To surrounding diffusion until being fully filled with toroidal cavity and its surrounding soil space, therewith solidifying and setting and couple form waterproof supporting Circle, slip casting clears up slip casting linker after terminating.
Step 6:As shown in Fig. 2 in waterproof support circle 1 by stake holes projected depth carry out borehole, and stake holes bottom after It is continuous to backbreak downwards, backbreak when reaching projected depth, drain bottom hole ponding, pave and hand compaction to form thickness be 20~30cm's Lime Stabilization layer 3, uniform breakstone water-proof layer 4 of the graded broken stone formation thickness for 35~50cm that pave on Lime Stabilization layer 3; Slip casing by pressure plate is fixedly mounted by expansion bolt in the top surface of breakstone water-proof layer 1, and bottom slip casting is offered on slip casing by pressure plate Hole, high polymer grouting is carried out by bottom injected hole, is made the infiltration of high polymer grouting liquid in the space of graded broken stone, is expanded therewith Solidification, forms bottom waterproof base plate, and constitutes a waterproof entirety with side wall waterproof support circle, ensures that later stage pile body is filled with this Construction quality and construction speed.

Claims (4)

1. a kind of construction method of the Manual excavated pile structure of high polymer grouting protection, it is characterized in that:
The Manual excavated pile structure of high polymer grouting protection is:It is the waterproof formed by high polymer grouting to set stake holes hole wall Support circle (1);The slip casing by pressure ring (10) with guard ring injected hole (11) is configured with the top of waterproof support circle (1), anti- The periphery of water support circle (1), is circumferentially intervally distributed with the reinforcement post (2) formed by high polymer grouting;Surpass in the bottom of stake holes Dig in section, with lime place mat formation Lime Stabilization layer (3), pave graded broken stone formation breakstone water-proof on Lime Stabilization layer (3) Layer (4), the breakstone water-proof layer (4) top surface by expansion bolt be fixedly mounted slip casing by pressure plate (5), the pressure note Bottom injected hole (6) is offered on pulpboard (5), the high polymer grouting liquid infiltration injected by bottom injected hole (6) is in level with broken In the space of stone, and expansion curing formation waterproof base plate;
The construction method of the Manual excavated pile structure of the high polymer grouting protection is carried out as follows:
Step 1:By the prefabricated guard ring steel pipe of caisson drilling diameter, by the guard ring steel on the position coaxial with caisson Pipe merogenesis is gradually vibrated or static pressure is sunk in soil, in embedded depth 80~100cm bigger than artificial digging pile projected depth, is removed The toroidal cavity that guard ring steel pipe formation thickness is 4~10cm, toroidal cavity, the slip casing by pressure are blocked up using slip casing by pressure ring seal Ring counterweight is fixed on the ground, with each guard ring injected hole of 30~50cm interval setting on the slip casing by pressure ring, each Guard ring Grouting Pipe (9), the other end and the slip casting linker of each guard ring Grouting Pipe (9) are connected on guard ring injected hole respectively (12) it is connected, the top center of the slip casting linker (12) is provided with grouting port, by the grouting port to the annular High polymer slurry is injected in cavity;
Step 2:At the periphery of guard ring steel pipe, 60~100cm of distance protection circle steel pipe position, using rig vertical construction Reinforcement injected hole, the spacing of the reinforcement injected hole is 40~60cm, if being become silted up containing loose soil bed, drifting sand layer or high-compressibility The adverse geological condition of mud layer, reinforcement slip casting hole depth is not less than caisson projected depth, otherwise then depth is not less than caisson The 2/3 of projected depth, is blocked in reinforcement injected hole top surface using slip casing by pressure orifice plate, and the slip casing by pressure orifice plate counterweight is consolidated It is fixed that reinforced opening Grouting Pipe is inserted in the central through hole of slip casing by pressure orifice plate on the ground, by reinforced opening Grouting Pipe to described High polymer slurry is injected in reinforcement injected hole;
Step 3:Grouting sequence is determined according to geology survey data, if containing loose soil bed, drifting sand layer or high-compressibility mud The adverse geological condition of layer, then be introduced into the mortar depositing construction that step 4 carries out reinforcement injected hole, enters back into step 5 and carries out waterproof branch Guard ring mortar depositing construction;Otherwise then it is introduced into step 5 and carries out waterproof support circle mortar depositing construction, enters back into step 4 and carry out reinforcement slip casting Hole mortar depositing construction;
Step 4:High polymer grouting is carried out by reinforcement Grouting Pipe, injection slurry expands rapidly reaction, to surrounding spread until It is fully filled with reinforcement injected hole and its surrounding soil space, and solidifying and setting formation reinforcement cylinder therewith;
Step 5:High polymer grouting is carried out by guard ring Grouting Pipe and linker, injection slurry expands rapidly reaction, Xiang Si Week diffusion until being fully filled with toroidal cavity and its surrounding soil space, therewith solidifying and setting and couple form waterproof support circle, Slip casting clears up slip casting linker after terminating;
Step 6:Borehole is carried out by stake holes projected depth in waterproof support circle, and in stake holes bottom, continuation is backbreak downwards, is backbreak When reaching projected depth, bottom hole ponding is drained, paves and hand compaction forms Lime Stabilization layer, uniformly spread out on Lime Stabilization layer Spread graded broken stone formation breakstone water-proof layer;Breakstone water-proof layer top surface by expansion bolt be fixedly mounted slip casing by pressure plate, Bottom injected hole is offered on the slip casing by pressure plate, high polymer grouting is carried out by bottom injected hole, makes high polymer grouting liquid Infiltration is in the space of graded broken stone, and expansion curing, forms bottom waterproof base plate, and constitute one with side wall waterproof support circle therewith Individual waterproof cylinder is overall.
2. the construction method of the Manual excavated pile structure of high polymer grouting protection according to claim 1, it is characterized in that:Press Following manner determines the consumption of high polymer slurry in single reinforcement injected hole and waterproof support circle, and the high polymer slurry refers to still The unreacted slurry being in a liquid state, is mixed in equal volume with raw material B with raw material A, and the mass M of high polymer slurry is:
M = ρ 2 V 1 2 + ρ 3 V 1 2 = ρ 1 V 1
Wherein, V1The volume of high polymer slurry used by single reinforcement injected hole or waterproof support circle;
ρ2For the density of raw material A;ρ3For raw material B density;ρ1For the hybrid density of high polymer slurry;
According to the principle of mass conservation before and after high polymer slurry reaction, have:M=a ρ4V21V1
Wherein, V2For the cavity volume of single injected hole or waterproof support circle, ρ4Density is freely sent out for high polymer slurry;
A is that waterproof irrigates coefficient, and it is 1.5~4.0 to need to take a according to different waterproofs;
Then have:
3. the construction method of the Manual excavated pile structure of high polymer grouting protection according to claim 1, it is characterized in that:Institute The thickness for stating waterproof support circle (1) is 4~10cm;The reinforcement post (2) be in the periphery 60 of waterproof support circle (1)~ At 100cm position.
4. the construction method of the Manual excavated pile structure of high polymer grouting protection according to claim 1, it is characterized in that:Institute The thickness for stating Lime Stabilization layer (3) is 20~30cm, and the thickness of the breakstone water-proof layer (4) is 35~50cm.
CN201710213738.XA 2015-11-22 2015-11-22 A kind of construction method of the Manual excavated pile structure of high polymer grouting protection Active CN106948340B (en)

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