CN104912065B - Dowel pile construction method under water - Google Patents

Dowel pile construction method under water Download PDF

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Publication number
CN104912065B
CN104912065B CN201510311005.0A CN201510311005A CN104912065B CN 104912065 B CN104912065 B CN 104912065B CN 201510311005 A CN201510311005 A CN 201510311005A CN 104912065 B CN104912065 B CN 104912065B
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dowel
anchor
hole
pipe
water
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CN104912065A (en
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张剑宁
田贵洪
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ROAD AND WATERWAY CONSTRUCTION ENGINEERING Co Ltd
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ROAD AND WATERWAY CONSTRUCTION ENGINEERING Co Ltd
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Abstract

The invention discloses a kind of dowel pile construction method under water;The reinforcing of this method structure suitable for the water for having resistance to plucking, antiskid or raising whole structural stability demand, is also applied for the Overwater-floating floating bodies such as positioning ship, floating platform.Characterized in that, running as follows:Putting up platform, solidifying Anchor Agent, dowel and Grouting Pipe make and installation, hole path pressure grouting, withdrawing sleeve pipe, anchor pile health soon for pore-creating under water, perfusion.This method has the advantages that consumption man-hour is few, it is high, cost-effective to save material, easy for installation, efficiency of construction.With traditional cast-in-place Underwater Concrete strengthening of foundation structures project plan comparison, this method has the features such as saving artificial, few material consumption, low engineering cost, quick, easy for installation construction, safety and environmental protection.

Description

Dowel pile construction method under water
Technical field
It is specifically dowel pile construction method under water the present invention relates to a kind of anchoring underwater construction method.
Background technology
Anchor pile is a kind of structure that active reinforcing is carried out to building.It is used as the tensional element for going deep into stratum, anchor pile One end is connected with building, and the other end gos deep into stratum, by the bonding rubbing action between stake and ground, strengthens fabric structure Antiskid and stability against overturning.
Anchor pile be usually used in anchor land building, under water anchor pile be by anchor pile be applied under water with anchoring structures A kind of technological innovation, dowel is inserted after pore-forming by being drilled under water with pipe with special equipment during construction(It can use as needed Steel wire rope, reinforcing bar, presstressed reinforcing steel etc. are used as dowel)And Grouting Pipe.Utilize the difference in specific gravity of cement mortar and water(Cement in unit volume Gravity produced by slurry is close to twice of water weight)Carry out underwater drainage perfusion.During to bottom hole grouting under pressure, water is by cement in hole After slurry extruding gradually outside tap, so as to form anchoring underwater pile body.The other end connection anchoring of dowel needs fixed construct Thing(Or the over-water floats that need to be positioned, such as ship, floating platform), reach the purpose of rock-steady structure.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, a kind of dowel pile construction method under water is provided herein;This The reinforcing of method structure suitable for the water for having resistance to plucking, antiskid or raising whole structural stability demand, is also applied for positioning The Overwater-floating floating bodies such as ship, floating platform.
The present invention is achieved in that a kind of dowel pile construction method under water of construction, it is characterised in that as follows Implement:
(1)Putting up platform, using floating platform method or fixed platform method;
1)Floating platform method:Possess the appropriate to the occasion use ship of navigation condition and set up floating platform, can use and be difficult when not satisfying the requirements The floating platform of the materials such as damaged and sealing good oil drum assembling;Design, the making of floating platform should meet safe handling demand, put down Platform bearing capacity is not lower than 2 times of construction total load head;
2)Fixed platform method:Preferably directly from water outlet structures as fixed platform, platform bearer ability is not applied preferably less than 1.5 times of work total load head;
During fixed platform method oblique drilling hole, it should use and add with enough rigidity and straight steel pipe or other suitable shaped steel Work leading truck, should be difficult displacement, top should be connected with structures after the landing of leading truck bottom;
(2)Pore-creating under water:Preferably select geological drilling rig to press and carry out underwater drilling operation with pipe bore extracting core process;
1)Rig is installed on platform, with total station survey, positioning rig;
2)Using geology drill sleeve with pipe boring and coring, stop during sleeve pipe cutting shoe insertion basement rock 50cm depth with pipe, rig Continue to creep into not less than design anchorage length;
3)Drill bit, the drilling rod rigged down, retain casing pipe hole forming;
(3)Anchor Agent is coagulated in perfusion soon:When needing to use secondary grouting scheme, implement to fill first by the following method with step Slurry:
Solidifying Anchor Agent ampoule is few soon, and material requested preferably weighs and uses packaging plastic bags in advance, uses preceding live mixing; Anchor Agent discharge tube is not preferably less than 50cm to anchor pile bottom hole discharging, perfusion depth;
Discharge tube irrigates the fast method and steps for coagulating Anchor Agent:
1)Discharge tube is put into hole after charging, slowly transferred with lifting rope, free-falling must not be allowed to;
2)When transferring discharge tube access hole bottom, the movable steel pole below cylinder first contacts to earth, and stack shell continues to sink down into hole by deadweight Bottom, while movable steel pole jacking and drives hinge bottom plate to depart from cylinder bottom to form discharge port in cylinder, Anchor Agent sinks to bottom hole;
3)Slowly lift discharge tube, Anchor Agent is all poured into bottom hole;
4)Discharge tube is proposed outside hole, completion is in the milk first;
(4)Dowel, Grouting Pipe are made with installing:
1)Dowel is arranged along anchor hole axis, is arranged in juxtaposition during two dowels using yi word pattern section, and triangle is pressed during 3 dowels Shape section is arranged, is arranged during 4 dowels by cross-shaped cross-section;
2)The dowel preparation method of anchoring section is, stringing ring(The plain bars of φ 6 are bent)Positioning, makes dowel(Or dowel beam) Center coincide substantially with anchor hole axis, with the staggeredly locking or firm with adhering with epoxy resin of rope card between adjacent dowel;
3)Grouting Pipe can be made with materials such as pvc pipe, conduit peschel, sebific ducts, after dowel completes, in the range of anchoring section Grouting Pipe and dowel thin wire colligation bunchy;
4)When dowel has quick resistance to plucking requirement, complete after being in the milk first dowel should be installed immediately, the outlet of Grouting Pipe is located at Highly locate away from Anchor Agent top surface 25cm;When being required without quick resistance to plucking, dowel is can be inserted into until bottom hole, note after anchor pile pore-forming The grout outlet of slurry pipe is located at away from the 25cm of dowel end;
(5)Hole path pressure grouting:
1)Dowel installs the sizing device that overflows after installing in cannula tip;
2)With the expansion cement slurry that mortar mixer mixing is enough, grouting pump is injected;
3)Grouting pump slip casting into anchor hole, the basically identical rear stopping of cement mortar and the concentration of magma that the slurry mouth that extremely overflows overflows is noted Slurry;
(6)Withdrawing sleeve pipe:The sizing device that overflows is removed, pulling out should take measures to avoid taking out of during steel sleeve, tube drawing section by section Dowel or fag end fall into the water;
(7)Anchor pile health:Forbid pulling at the muscle that weighs anchor in anchor pile natural Health preservation in water, maintenance processes, during slip casting It is synchronous to make health in cement mortar test specimen, water.
According to dowel pile construction method under water of the present invention, it is characterised in that:
The discharge tube is a kind of pressure lever type discharge tube, discharge tube by upper shell, lower shell, movable steel pole, stop nut, Steel pole foot pad, steel pole leading truck, hinge bottom plate, hinge steel shaft, silica gel grout cover, steel collet assemble, wherein upper shell and Lower shell is connected with hickey, and the stop nut on movable steel pole is detachable, is easy to clean discharge tube;
Its working method is:
(1)With hole is put under lifting rope after discharge tube charging, when sinking to bottom hole, touched using self gravitation and living in jack-up cylinder Dynamic steel pole, and rise hinge bottom plate is driven by movable steel pole, bottom plate turns over to form discharge port along under axle, and grouting material flows to bottom hole.
(2)Lift after discharge tube, movable steel pole and hinge bottom plate tenesmus, grouting material continues towards bottom hole to completion in cylinder Grouting.
According to dowel pile construction method under water of the present invention, it is characterised in that:
The Anchor Agent solidifying soon is mixed with forming by fixing agent for anchor poles and accelerator by field test, can make dowel short Certain withdrawal resistance can be born in time, prevents dowel to be carried in withdrawing sleeve pipe;
Solidifying Anchor Agent fixing agent for anchor poles, accelerator and water modulation are formed soon, trial according to the following steps with require to carry out:
(1)The volume scope of accelerator is designed, just intends 1.0~3.0% values that volume presses Anchor Agent;
(2)By Anchor Agent, accelerator(Volume 2.0%)Water mixing is mixed uniform, and records suitable services denseness(With formed pasty state, Fluidised form compound and dowel install smooth be defined)When water consumption;
(3)Make a sample at interval of 0.5% volume by accelerator, observation is kept for the duration of suitable services denseness, and Make a record;
(4)Take and meet engineering time requirement(Coagulate Anchor Agent soon from mixing and prolong to the dowel completion required engineering time is installed Long 30min)Match ratio be used as fast solidifying Anchor Agent design mixture proportion.
According to dowel pile construction method under water of the present invention, it is characterised in that:
The excessive sizing device is made up of PVC reducing tees, straight tube, elbow and O-shaped silica gel slurry check ring;Its function is can Sleeve pipe slurries suitable for reading are returned out during centralized collection slip casting, it is to avoid cement mortar is lost in and polluted river water.
Technological principle:Anchor pile stake position is arranged by structural stress analysis and field geology construction features, stable structure is calculated Build thing(Or the Overwater-floating floating body such as ship)Required maximum anchor force and dowel pile length.Geological drilling rig enters with pipe coring boring method Dowel is inserted after pore-creating under water-filling, pore-forming(This engineering method uses steel wire rope, as needed also can using regular reinforcement, presstressed reinforcing steel, Rod iron etc.)And Grouting Pipe.Utilize the difference in specific gravity of cement mortar and water(Gravity in unit volume produced by cement mortar is close to water weight Twice)Carry out underwater drainage perfusion.During to bottom hole grouting under pressure, after water is extruded by cement mortar in hole gradually outside tap, from And form anchoring underwater pile body.
The advantage of the invention is that:This method has few consumption man-hour, saving material, easy for installation, efficiency of construction is high, save About cost the advantages of.With traditional cast-in-place Underwater Concrete strengthening of foundation structures project plan comparison, this method, which has, saves artificial, material Consume less, low engineering cost, construct quick, easy for installation, safety and environmental protection the features such as.
Social benefit is analyzed:Anchor pile is usually used in land, and anchor pile is the application technology that anchor pile is constructed under water under water Innovation, it is in grappling Overwater-floating floating body, and particularly stablizing the engineering construction field such as building structure in water has good application prospect. Dowel pile driving construction is quick under water, and work, material expend few, reduce engineering cost, economizes on resources, construction safety, ring small to water pollution Protect, with good social benefit.
The scope of application:This engineering method structure suitable for the water for having resistance to plucking, antiskid or raising whole structural stability demand, It is also applied for the Overwater-floating floating bodies such as positioning ship, floating platform.
Brief description of the drawings
Fig. 1-1 floats platform drilling construction method schematic diagram
The vertical drilling construction method schematic diagram of Fig. 1-2 fixed platforms
Fig. 1-3 fixed platform oblique drilling hole construction method schematic diagrames
Fig. 1-4 is A drawings in Fig. 1-1~1-3
Fig. 2 discharge tube structure design elevation
Fig. 2-1 is full-page proof at A in Fig. 2(Pipe fitting joint)
Fig. 2-2 is B full-page proofs in Fig. 2-1(Hickey)
Fig. 2-3 is movable steel pole schematic diagram in Fig. 2
Fig. 2-4 is II-II sectional schematic diagram in Fig. 2-1
Fig. 2-5 is I-I diagrammatic cross-section in Fig. 2
Fig. 2-6 is silicagel pad plan
Fig. 2-7 is hinge base plate plane figure
Fig. 2-8 is hinge bottom plate elevation
The excessive sizing device structural representations of Fig. 3
Fig. 4 pressure lever type discharge tube grouting construction process charts
Fig. 5 dowel section layout drawings
Fig. 6 anchor pile grouting process figures
Fig. 7 dowel pile constructing process flow charts under water
Wherein:Upper shell 2.1, lower shell 2.2, movable steel pole 2.3, stop nut 2.4, steel pole foot pad 2.5, steel pole is oriented to Frame 2.6, hinge bottom plate 2.7, hinge steel shaft 2.8, silica gel grout cover 2.9, steel collet 2.10, cord hole 2.11, hickey 2.12, Reducing tee 3.1, straight tube 3.2, elbow 3.3, O-shaped silica gel slurry check ring 3.4.
Embodiment
Below in conjunction with accompanying drawing 1-7, the present invention is described in detail, and the technical scheme in the embodiment of the present invention is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole implementation Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made Every other embodiment, belongs to the scope of protection of the invention.
The present invention provides a kind of dowel pile construction method, the scope of application under water by innovating:This engineering method be applied to have resistance to plucking, The reinforcing of structure in the water of antiskid or raising whole structural stability demand, is also applied for positioning ship, floating platform etc. waterborne Floating body.
The present invention is run as follows:
(1)Putting up platform, using floating platform method or fixed platform method;
1)Floating platform method:Possess the appropriate to the occasion use ship of navigation condition and set up floating platform, can use and be difficult when not satisfying the requirements The floating platform of the materials such as damaged and sealing good oil drum assembling;Design, the making of floating platform should meet safe handling demand, put down Platform bearing capacity is not lower than 2 times of construction total load head;
2)Fixed platform method:Preferably directly from water outlet structures as fixed platform, platform bearer ability is not applied preferably less than 1.5 times of work total load head;
During fixed platform method oblique drilling hole, it should use and add with enough rigidity and straight steel pipe or other suitable shaped steel Work leading truck, should be difficult displacement, top should be connected with structures after the landing of leading truck bottom;
(2)Pore-creating under water:Preferably select geological drilling rig to press and carry out underwater drilling operation with pipe bore extracting core process;
1)Rig is installed on platform, with total station survey, positioning rig;
2)Using geology drill sleeve with pipe boring and coring, stop during sleeve pipe cutting shoe insertion basement rock 50cm depth with pipe, rig Continue to creep into not less than design anchorage length;
3)Drill bit, the drilling rod rigged down, retain casing pipe hole forming;
(3)Anchor Agent is coagulated in perfusion soon:When needing to use secondary grouting scheme, implement to fill first by the following method with step Slurry:
Solidifying Anchor Agent ampoule is few soon, and material requested preferably weighs and uses packaging plastic bags in advance, uses preceding live mixing; Anchor Agent discharge tube is not preferably less than 50cm to anchor pile bottom hole discharging, perfusion depth;
Such as Fig. 4, the method and steps of the fast solidifying Anchor Agent of discharge tube perfusion is:
1)Discharge tube is put into hole after charging, slowly transferred with lifting rope, free-falling must not be allowed to;
2)When transferring discharge tube access hole bottom, the movable steel pole below cylinder first contacts to earth, and stack shell continues to sink down into hole by deadweight Bottom, while movable steel pole jacking and drives hinge bottom plate to depart from cylinder bottom to form discharge port in cylinder, Anchor Agent sinks to bottom hole;
3)Slowly lift discharge tube, Anchor Agent is all poured into bottom hole;
4)Discharge tube is proposed outside hole, completion is in the milk first;
(4)Dowel, Grouting Pipe are made with installing:
1)Such as Fig. 5, dowel is arranged along anchor hole axis, is arranged in juxtaposition during two dowels using yi word pattern section, during 3 dowels Arrange, arranged during 4 dowels by cross-shaped cross-section by triangular section;
2)The dowel preparation method of anchoring section is, stringing ring(The plain bars of φ 6 are bent)Positioning, makes dowel(Or dowel beam) Center coincide substantially with anchor hole axis, with the staggeredly locking or firm with adhering with epoxy resin of rope card between adjacent dowel;
3)Grouting Pipe can be made with materials such as pvc pipe, conduit peschel, sebific ducts, after dowel completes, in the range of anchoring section Grouting Pipe and dowel thin wire colligation bunchy;
4)When dowel has quick resistance to plucking requirement, complete after being in the milk first dowel should be installed immediately, the outlet of Grouting Pipe is located at Highly locate away from Anchor Agent top surface 25cm;When being required without quick resistance to plucking, dowel is can be inserted into until bottom hole, note after anchor pile pore-forming The grout outlet of slurry pipe is located at away from the 25cm of dowel end;
(5)Hole path pressure grouting:
1)Such as Fig. 6, dowel installs the sizing device that overflows after installing in cannula tip;
2)With the expansion cement slurry that mortar mixer mixing is enough, grouting pump is injected;
3)Grouting pump slip casting into anchor hole, the basically identical rear stopping of cement mortar and the concentration of magma that the slurry mouth that extremely overflows overflows is noted Slurry;
(6)Withdrawing sleeve pipe:The sizing device that overflows is removed, pulling out should take measures to avoid taking out of during steel sleeve, tube drawing section by section Dowel or fag end fall into the water;
(7)Anchor pile health:Forbid pulling at the muscle that weighs anchor in anchor pile natural Health preservation in water, maintenance processes, during slip casting It is synchronous to make health in cement mortar test specimen, water.
The pile construction technology scheme of dowel under water of the present invention
1. the conceptual design of anchor pile drilling under water:Such as Fig. 1-1 to 1-4, anchor pile can be according to different engineering need under water The floating platform method of summation execution conditions selection or fixed work platform method are constructed.Vertical drilling should be used during floating platform method construction Scheme(See Fig. 1-1);During fixed work platform method construction, then vertical drilling can be selected as needed(See Fig. 1-2)Or leading truck Oblique drilling hole(See Fig. 1-3)Etc. scheme.
(1)Rig is selected:Because this technology needs to carry out underwater drilling, it is contemplated that underwater air decline of pressure and deslagging When can cause water pollution, the rig such as down-the-hole drill that boring mud is discharged by compressed air should not be used, preferably use geology brill Machine is pressed carries out underwater drilling operation with pipe bore extracting core process.
(2)It is deep-controlled with pipe:During with pipe operation, sleeve pipe should not be with entering bottom hole, top embedding rock shape of the pin in anchoring section Cheng Guan(Hole)The duct of wall opposing seal, to avoid disturbance during tube drawing from completing the cement mortar irrigated, damage or destruction Anchoring body.
2. anchor hole grouting program is designed:Considering should withdrawing sleeve pipe as early as possible after slip casting(Prevent because of cement mortar consolidation, block set Pipe), may be dragged during withdrawing sleeve pipe when pulling out or moving dowel, this technology is avoided using secondary grouting scheme Such the occurrence of.Wherein slip casting first is that Anchor Agent is coagulated in perfusion soon in the range of bottom hole certain depth, and its role is to make Dowel can prevent dowel from being dragged to pull out or mobile enough withdrawal resistances in formation after slip casting is fully completed, before withdrawing sleeve pipe.Wherein Secondary grouting is to fill expanding cement into dowel stake holes(Sand)Slurry.
Back-grouting scheme after anchor pile pore-forming, pull out and implement before sleeve pipe, technological process is:Be in the milk first → anchor is installed Muscle → secondary grouting.
(1)Discharge tube is designed:Grouting employs the pressure lever type discharge tube of designed, designed first(See Fig. 2)Enter as Anchor Agent The means of delivery in hole.Discharge tube is by upper shell, lower shell, movable steel pole and stop nut, steel pole leading truck, hinge bottom plate and silicon The parts such as glue grout cover assemble.Advantage using discharge tube feeding is, Anchor Agent can smoothly be sent into bottom hole, and in water Under sink during be difficult to be washed away loss by water.
(2)The sizing device that overflows is designed:Such as Fig. 3, the sizing device that overflows is by PVC reducing tees, straight tube, elbow and O-shaped silica gel slurry check ring Constitute, its function is to return out sleeve pipe slurries suitable for reading when collecting slip casting, it is to avoid cement mortar is lost in and polluted river water.
(3)Solidifying Anchor Agent selection and mix-design requirement soon:Through building site trial, fixing agent for anchor poles and accelerator are arranged in pairs or groups Solidifying Anchor Agent soon can be formed when using, dowel is born certain withdrawal resistance in a short time, prevents dowel in withdrawing It is carried over during sleeve pipe.
Solidifying Anchor Agent fixing agent for anchor poles, accelerator and water modulation are formed soon, trial according to the following steps with require to carry out:
1)The volume scope of accelerator is designed, just intends 1.0~3.0% values that volume presses Anchor Agent;
2)By Anchor Agent, accelerator(Volume 2.0%)Water mixing is mixed uniform, and records suitable services denseness(With formed pasty state, Fluidised form compound and dowel install smooth be defined)When water consumption;
3)Make a sample at interval of 0.5% volume by accelerator, observation is kept for the duration of suitable services denseness, and Make a record;
4)Take and meet engineering time requirement(Anchor Agent is coagulated soon from mixing to the engineering time extension installed needed for dowel is completed 30min)Match ratio be used as fast solidifying Anchor Agent design mixture proportion.
Engineering test example:The refined of construction is undertaken the construction of by Road and Waterway Construction Engineering Co., Ltd.(Peace)Health(It is fixed)At a high speed Highway C7 contract section Jiang Jia dams Tian Quan rivers bridge is located in Ya'an Tian Quanleying townshiies, and bridge is that many work(Interflowing area connecting lines are complete across day River is designed, and its 3#~5# bridge pier in water is using building steel trestle, the construction of steel platform scheme.
During the piling of trestle and platform, part steel-pipe pile because Riverbed is thin and basement rock is hard can not be effectively embedding Gu, trestle stability difference to trestle, it is necessary to reinforce.Conventional reinforcement means is the cast-in-place Underwater Concrete parcel at the riverbed of stake position Steel-pipe pile, i.e., form concrete Extended chemotherapy to stablize trestle work structure at stake bottom, this reinforcement means process is more, progress is slow, consumable quantity is big, It is costly.Through comparing, innovation take under water anchor pile technology to steel trestle embedding stake depth deficiency at reinforce.Dowel under water Pile section about material, accelerates project progress, reduces engineering cost, after scheme is implemented, enhance trestle, platform structure it is steady It is qualitative, it is ensured that structure uses the smooth construction for bridge pier of being paddled with bridge safely.
Economic and Efficiency Analysis:Co-occurrence is poured Underwater Concrete strengthening of foundation scheme and compared, under water anchor pile Scheme of Strengthening input it is artificial, Equipment, material are few, cost-effective(It is shown in Table 1).Table 1:Different Scheme of Strengthening Cost comparisons tables
As seen from the above table, anchor pile Scheme of Strengthening cost is 59280 yuan under water, than with cast-in-place Underwater Concrete strengthening of foundation scheme Cost-effective 107727 yuan, cost savings rate is 64.5%, remarkable in economical benefits.
Social benefit is analyzed:Anchor pile is usually used in land, and anchor pile is the application technology that anchor pile is constructed under water under water Innovation, it is in grappling Overwater-floating floating body, and particularly stablizing the engineering construction field such as building structure in water has good application prospect. Dowel pile driving construction is quick under water, and work, material expend few, reduce engineering cost, economizes on resources, construction safety, ring small to water pollution Protect, with good social benefit.
Technical characterstic:Man-hour is few, it is high, cost-effective etc. to save material, easy for installation, efficiency of construction with consuming for this method Advantage.With traditional cast-in-place Underwater Concrete strengthening of foundation structures project plan comparison, this method have save artificial, material consumption it is few, The features such as low engineering cost, quick, easy for installation construction, safety and environmental protection.
The scope of application:This engineering method structure suitable for the water for having resistance to plucking, antiskid or raising whole structural stability demand Reinforcing, be also applied for the Overwater-floating floating bodies such as positioning ship, floating platform.
Technological principle:Anchor pile stake position is arranged by structural stress analysis and field geology construction features, stable structure is calculated Build thing(Or the Overwater-floating floating body such as ship)Required maximum anchor force and dowel pile length.Geological drilling rig enters with pipe coring boring method Dowel is inserted after pore-creating under water-filling, pore-forming(Steel wire rope, regular reinforcement, presstressed reinforcing steel, rod iron etc. can be selected as needed)And note Slurry pipe.Utilize the difference in specific gravity of cement mortar and water(Twice close to water weight of gravity in unit volume produced by cement mortar)Carry out Underwater drainage is irrigated.During to bottom hole grouting under pressure, after water is extruded by cement mortar in hole gradually outside tap, so as to form subsea anchor Gu pile body.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention. A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one The most wide scope caused.

Claims (3)

1. a kind of dowel pile construction method under water, it is characterised in that implement as follows:
(1)Putting up platform, using floating platform method or fixed platform method;
1)Floating platform method:Floating platform is set up using ship when possessing navigation condition, not cracky is used when not satisfying the requirements and close The good floating platform of oil drum material assembling of envelope property;Design, the making of floating platform should meet safe handling demand, platform bearer ability Not lower than construct 2 times of total load head;
2)Fixed platform method:Directly from water outlet structures as fixed platform, platform bearer ability is not less than construction total load head 1.5 times;
During fixed platform method oblique drilling hole, it should use with enough rigidity and straight steel pipe or shaped steel processing leading truck, be oriented to Displacement should be difficult after the landing of frame bottom, top should be connected with structures;
(2)Pore-creating under water:Pressed from geological drilling rig and carry out underwater drilling operation with pipe bore extracting core process;
1)Rig is installed on platform, with total station survey, positioning rig;
2)Using geology drill sleeve with pipe boring and coring, stop during sleeve pipe cutting shoe insertion basement rock 50cm depth with pipe, rig continues Drilling is to not less than design anchorage length;
3)Drill bit, the drilling rod rigged down, retain casing pipe hole forming;
(3)Anchor Agent is coagulated in perfusion soon:When needing to use secondary grouting scheme, implement to be in the milk first by the following method with step:
Solidifying Anchor Agent ampoule is few soon, and material requested should in advance weigh and use packaging plastic bags, use preceding live mixing;It is fast solidifying Anchor Agent discharge tube is not less than 50cm to anchor pile bottom hole discharging, perfusion depth;
Discharge tube irrigates the fast method and steps for coagulating Anchor Agent:
1)Discharge tube is put into hole after charging, slowly transferred with lifting rope, free-falling must not be allowed to;
2)When transferring discharge tube access hole bottom, the movable steel pole below cylinder first contacts to earth, and stack shell continues to sink down into bottom hole by deadweight, together When movable steel pole jacking and drive hinge bottom plate to depart from cylinder bottom to form discharge port in cylinder, solidifying Anchor Agent sinks to bottom hole soon;
3)Slowly lift discharge tube, make to coagulate Anchor Agent soon and all pour into bottom hole;
4)Discharge tube is proposed outside hole, completion is in the milk first;
(4)Dowel, Grouting Pipe are made with installing:
1)Dowel is arranged along anchor hole axis, is arranged in juxtaposition during two dowels using yi word pattern section, disconnected by triangle during 3 dowels Face is arranged, is arranged during 4 dowels by cross-shaped cross-section;
2)The dowel preparation method of anchoring section is that stringing ring positioning, stringing ring is that the plain bars of φ 6 are bent, and makes dowel or dowel Beam center coincide substantially with anchor hole axis, with the staggeredly locking or firm with adhering with epoxy resin of rope card between adjacent dowel;
3)Grouting Pipe, after dowel completes, the Grouting Pipe in the range of anchoring section are made with pvc pipe, conduit peschel, hose material With dowel thin wire colligation bunchy;
4)When dowel has quick resistance to plucking requirement, complete that dowel should be installed immediately after being in the milk first, the outlet of Grouting Pipe is located at away from fast Solidifying Anchor Agent top surface 25cm highly locates;When being required without quick resistance to plucking, dowel is can be inserted into until bottom hole, note after anchor pile pore-forming The grout outlet of slurry pipe is located at away from the 25cm of dowel end;
(5)Hole path pressure grouting:
1)Dowel installs the sizing device that overflows after installing in cannula tip;
2)With the expansion cement slurry that mortar mixer mixing is enough, grouting pump is injected;
3)Grouting pump slip casting into anchor hole, the basically identical rear stopping slip casting of cement mortar and the concentration of magma that the slurry mouth that extremely overflows overflows;
(6)Withdrawing sleeve pipe:The sizing device that overflows is removed, pulling out should take measures to avoid taking dowel out of during steel sleeve, tube drawing section by section Or fag end falls into the water;
(7)Anchor pile health:Forbid pulling at the muscle that weighs anchor in anchor pile natural Health preservation in water, maintenance processes, it is synchronous during slip casting Make health in cement mortar test specimen, water;
The discharge tube is a kind of pressure lever type discharge tube, and discharge tube is by upper shell(2.1), lower shell(2.2), movable steel pole (2.3), stop nut(2.4), steel pole foot pad(2.5), steel pole leading truck(2.6), hinge bottom plate(2.7), hinge steel shaft (2.8), silica gel grout cover(2.9), steel collet(2.10)Assemble, wherein upper shell(2.1)And lower shell(2.2)Use screw thread Interface(2.12)Connection, movable steel pole(2.3)On stop nut(2.4)It can dismantle, be easy to clean discharge tube;
Its working method is:
(1)With hole is put under lifting rope after discharge tube charging, when sinking to bottom hole, touched using self gravitation and movable steel in jack-up cylinder Bar(2.3), and by movable steel pole(2.3)Drive and rise hinge bottom plate(2.7), bottom plate turns over to form discharge port along under axle, injection material Stream is to bottom hole;
(2)Lift after discharge tube, movable steel pole(2.3)With hinge bottom plate(2.7)Grouting material continues towards bottom hole in tenesmus, cylinder To completion grouting.
2. dowel pile construction method under water according to claim 1, it is characterised in that:
The Anchor Agent solidifying soon is mixed with forming by fixing agent for anchor poles and accelerator by field test, dowel in a short time can Certain withdrawal resistance is enough born, prevents dowel to be carried in withdrawing sleeve pipe;
Solidifying Anchor Agent fixing agent for anchor poles, accelerator and water modulation are formed soon, trial according to the following steps with require to carry out:
(1)The volume scope of accelerator is designed, just intends 1.0~3.0% values that volume presses fixing agent for anchor poles;
(2)By fixing agent for anchor poles, accelerator, the water mixing of volume 2.0% is mixed uniform, water consumption during record suitable services denseness, with Form pasty state, fluidised form compound and dowel and smooth be defined is installed;
(3)Make a sample at interval of 0.5% volume by accelerator, observation is kept for the duration of suitable services denseness, and is carried out Record;
(4)Take and meet the match ratio of engineering time requirement as fast solidifying Anchor Agent design mixture proportion, from mixing soon solidifying Anchor Agent to Engineering time extension 30min needed for dowel is completed is installed.
3. dowel pile construction method under water according to claim 1, it is characterised in that:
The excessive sizing device is by PVC reducing tees(3.1), straight tube(3.2), elbow(3.3)With O-shaped silica gel slurry check ring(3.4)Structure Into;Sleeve pipe slurries suitable for reading can be returned out during centralized collection slip casting, it is to avoid cement mortar is lost in and polluted river water.
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