CN106284415A - A kind of water intake caisson hang floating construction method - Google Patents
A kind of water intake caisson hang floating construction method Download PDFInfo
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- CN106284415A CN106284415A CN201610823599.8A CN201610823599A CN106284415A CN 106284415 A CN106284415 A CN 106284415A CN 201610823599 A CN201610823599 A CN 201610823599A CN 106284415 A CN106284415 A CN 106284415A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/063—Tunnels submerged into, or built in, open water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/04—Methods or installations for obtaining or collecting drinking water or tap water from surface water
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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
- E02D2250/0061—Production methods for working underwater
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Abstract
What the present invention disclosed a kind of water intake caisson hangs floating construction method, belongs to the realm of building construction, including step: 1) water intake prefabricated: tire of the prefabricated end, formed reinforcing steel bars, plank sheathing makes, and built-in fitting makes, and scaffold makes and water intake encapsulation process；2) water intake goes out fortune: water intake goes out fortune form and determines, water intake goes out to transport the determination in navigation channel, and water intake goes out fortune, installs.The present invention utilizes project under construction successfully to carry out water intake Precast Caisson, go out fortune, installation, on the premise of ensureing that water intake caisson goes out fortune safety and is effectively improved construction quality, organized by reasonable construction, effectively utilize project under construction foundation trench as prefabricated place, existing ship machine equipment is utilized to carry out fortune, installment work, reduce input to greatest extent to the greatest extent, complete as scheduled for the overall duration and won the quality time, create bigger benefit.
Description
Technical field
The present invention relates to a kind of water intake caisson hangs floating construction method, belongs to the realm of building construction.
Background technology
In construction, when do not have in place the prefabricated place of large-scale component and relevant supporting go out transport facility time, such as design
Water intaking box culvert land and water switching phase is positioned at land, if the side depth of water that borders on the sea is shallower, rock stratum is thicker, it is impossible to meets shipping draft and wants
Asking, installing box culvert needs to excavate navigation channel, and reef explosion amount is big, costly.
Summary of the invention
The problem existed for above-mentioned prior art, what the present invention provided a kind of water intake caisson hangs floating construction method,
Adaptability is good, and construction cost is low, and construction safety coefficient is high.
To achieve these goals, the present invention use a kind of water intake caisson hang floating construction method, including following
Step:
1) water intake is prefabricated: tire of the prefabricated end, formed reinforcing steel bars, and plank sheathing makes, and built-in fitting makes, and scaffold makes and water intake
Encapsulation process；
2) water intake goes out fortune: water intake goes out fortune form and determines, water intake goes out to transport the determination in navigation channel, and water intake goes out fortune, installs.
As improvement, before described step 1), also include that the construction of Temporary Cofferdam, the construction of described Temporary Cofferdam include pushing away
Fill out mountain rock ballast, push away and fill out yellow clay barricade, the dismounting of termination, existing cofferdam, geomembrane processing and lay, backfill in sand and cofferdam
Draw water.
As improvement, the formed reinforcing steel bars in described step 1) specifically includes: end tire processes and reinforcing bar binding.
As improvement, described plank sheathing makes and specifically includes: wall form, beam forms, column template operation.
As improvement, described built-in fitting makes and specifically includes:
1. water hole
Water hole is embedded among end wall eight word, uses φ 150mm pvc pipe to process, pre-buried 4 of single water intake, and totally 12
Individual, the long 500mm of pvc pipe, it is positioned at cross wall, pipe lower limb distance water intake base plate 30cm；
2. water intake bottom windows pre-buried Φ 20mm bulkhead nut
Shank of bolt total length 330mm, the long 7cm of bulkhead nut, screw rod enters nut 35mm, bulkhead nut distance edge of window 200mm,
Away from 500mm mono-, A type single window pre-buried 32 altogether, Type B single window totally 24,80 altogether, after form removal, major part
Bolt eye domestic demand coating butter；
3. water intake inlet opening
Inlet opening uses φ 140mm steel pipe to process, band seal plate and iron plate, seal plate and steel pipe full weld；
4. water inlet pipe valve controls bar built-in fitting
50 angle steel and 12mm round steel is used to process, the long 300mm of angle steel, the long 350mm of round steel；
5. lifting pin uses φ 160mm steel column to process, and middle part band seal plate exposes 150mm；
Full weld between seal plate and pin, waterproof, each water intake buries 4 underground, totally 12；
6. chlorination pipe preformed hole
Chlorination pipe preformed hole is processed by internal diameter 300mmpvc pipe, pipe range 440mm.First chlorination pipe of each water intaking is reserved
Hole, arranges 3 altogether；
7. chlorination pipe carrier
Bracket built-in fitting is processed by 500 × 100 × 10mm steel plate, and bottom is welded with the claw that 16mm round steel processes, often
Individual water intake has 16 bracket built-in fittings, totally 48；
8. water intake top window pre-buried Φ 20mm bulkhead nut
A type water intake single window with 32, totally 256, A type；Type B water intake single window with 30, Type B totally 240；
9. pre-buried stake of leading a cow at water intake end face corner, Φ 25 reinforcing bar suspension ring.
As improvement, the water intake encapsulation process in described step 1) specifically includes: envelope window, the closure of water inlet, sealing
Rubber fixes, seal luffer boards installs, water inlet window batten down plate Leakage Test, batten down plate water seepage treatment and water intake top blind flange close
Envelope；
Described watertight rubber is fixed and is included following operation:
Step one, paste watertight rubber plate in batten down plate periphery and water intake concrete contact site, batten down plate only draws
Water rubber slab position, with angle grinding machine by clean for the polishings such as the dirt above this position, rust, with angle grinding machine by rubber slab and batten down
The sticking veneer polishing of plate is coarse；
Step 2, on batten down plate and rubber slab brushing first pass neoprene, the most dry after brushing second time neoprene, by rubber
Plate is attached on batten down plate, with rubber hammer hammering rubber slab gently, makes rubber slab and batten down plate paste firm；
Groove is done in step 3, transverse rubber plate and vertical rubber slab intersection, makes two parts be embedded in together；
Pasting twice rubber bar on step 4, rubber slab, the joint of twice rubber bar staggers more than 3m, and rubber bar joint is
45 ° of inclined-planes, joint is the most water-tight.
As improvement, described step 2) in water intake go out fortune, install include crane ship hook, water intake draw water floating,
Water intake goes out fortune operation and water intake is installed；
Described water intake goes out to transport operation and includes:
Step one, crane ship strand anchor hangs emersion fortune；
Step 2, go out fortune during water intake temporary storage point；
Step 3, measurement and positioning；
Step 4, the guarantee of lift heavy.
The present invention utilizes project under construction successfully to carry out water intake Precast Caisson, go out fortune, installation, is ensureing that water intake caisson goes out
On the premise of transporting safety and being effectively improved construction quality, organized by reasonable construction, effectively utilize project under construction foundation trench as in advance
Place processed, utilizes existing ship machine equipment to carry out fortune, installment work, reduces input to greatest extent to the greatest extent, the completeest for the overall duration
Work has won the quality time, creates bigger benefit.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention of greater clarity, below by embodiment, the present invention is entered
Row further describes.However, it should be understood that specific embodiment described herein is only in order to explain the present invention, and need not
In limiting the scope of the present invention.
Unless otherwise defined, all of technical term used herein and scientific terminology are led with the technology belonging to the present invention
The implication that the technical staff in territory is generally understood that is identical, and the term used the most in the description of the invention is intended merely to retouch
State the purpose of specific embodiment, it is not intended that in limiting the present invention.
Embodiment one
A kind of water intake caisson hang floating construction method, specifically include following steps:
1) construction of Temporary Cofferdam:
A) push away and fill out mountain rock ballast
The water stop cofferdam rock ballast that cuts into a mountain backfills from thing both sides, existing cofferdam simultaneously, finally closes in centre position, termination, cofferdam, stone
The slag side throwing that borders on the sea after having backfilled fills out armor stone, manages slope with backhoe inside cofferdam；
B) push away and fill out yellow clay barricade
Junction, the old and new cofferdam, is breakthrough after old cofferdam demolition, therefore before termination, original cofferdam is removed, needs therein
Pushing away and fill out yellow clay earth embankment, barricade top mark height+0.5m, top width 6m, side slope 1:1, yellow clay answers construction in layer, and spreading is closely knit, uses
Temporary leaking water wall when removing in termination, old cofferdam；
C) termination, existing cofferdam is removed
In cofferdam yellow clay barricade formed after, remove end, original cofferdam, during construction first with backhoe by the sand inside cofferdam
Native and packed yellow clay is excavated (backfill inside new cofferdam) and is exposed after geomembrane, sand and packed yellow clay excavate, and enters
Cutting into a mountain outside row the removing of rock ballast, the removing point two-layer of the rock ballast that cuts into a mountain is carried out, and+1.5m～+0.2m is ground floor, and ground floor is excavated
Behind the long region of 10m, backhoe enters+0.2m operation platform and carries out remaining the removing of rock ballast；
D) geomembrane processing and laying
Geomembrane is from domestic machine-shaping: the long 50m of monovolume geomembrane, wide 6m, and monovolume geomembrane is averagely cut into three by scene,
Monolithic geomembrane a size of 16.7m × 6m, geomembrane is connected by joint form, and film is not less than 50cm with the film lap of splice,
Seam crossing bag pressing dress yellow clay；
Geomembrane is laid and is closed up to centre from two ends along direction, cofferdam, should control geomembrane top and seaming position well and use during laying
Packed yellow clay fixes, and prevents from gliding, and geomembrane to be paved, it is to avoid fold occurs；
E) backfill sand
After geomembrane has been laid, in the range of geomembrane, push away back-up sand in time native ,+1.5m the absolute altitude that is backfilled to waterborne, wide 6m, under water
Part backfill thickness is not less than 2.5m；
F) draw water in cofferdam
After water stop cofferdam is formed, use two 236m3The water pump of/h draws water；
2) water intake is prefabricated
A) tire of the prefabricated end
Water intake is positioned at water intake engineering cofferdam, the long 37m of end tire, wide 13m, and totally 481, pile No. is 0-46m～0-83m；End tire
Base elevation is-8.93m, end tire thickness 200mm, and the end a height of-8.73m of tire top mark, strength grade of concrete is C25, outside end tire
Enclose and a wide 0.3m deep 0.2m collecting gutter is set at 1.0m, be inside paved with rubble；End tire diagonal position arranges 2 deep 1.0m and catchments
Hole；
B) formed reinforcing steel bars
1. end tire processes
Before section reinforcing bar at the bottom of colligation, first remove all foreign material on tire of the prefabricated end, it is ensured that platform surface is smooth, water intake base plate model
Enclose interior first one layer of 10mm thickness three-ply board of laying, three-ply board re-lays after coating butter thick layer plastic foil, prevents hair of fetching water
Raw sticky end and suction end phenomenon；
2. reinforcing bar binding
According to tire unwrapping wire position, the end, first colligation bottom layer of the reinforcing steel, a dead lift base plate transverse and longitudinal reinforcing bar is in place, base plate levels master
Shelving stool muscle and skeleton reinforcing steel bar between muscle, every cabin lattice shelve two Pin skeletons, shelve the circle meeting the claimed layer thickness of design
Type mortar pad, it is ensured that water intake base plate thickness and cover to reinforcement；
Wall steel bar colligation uses " Flos Mume " button, ties up silk and to tighten, must not lack button, it is ensured that framework of steel reinforcement is firm；Framework of steel reinforcement is pressed
Code requirement arranges protective layer cushion block, and before second and third layer of reinforcing bar binding, first labor cleaning's water intake connects a batch concrete surface, by curved
Bent gets rid of a batch reinforcing bar sleeve straightening, washes being stained with the mortar in rebar surface, connects batch lap of splice by affecting reinforcing bar
Locally concrete surface cuts；
C) plank sheathing makes
1. wall form
Formwork reinforcement uses double scaffold to add and singly draw or split bolt, singly draw bolt be pulled in formed on same elongated reinforcing bar right
Drawing reinforcing, wall reinforcement uses Screw arbor with nut at both-ends to add φ 12mm split bolt, and split bolt vertical and horizontal spacing is 500mm,
Body of wall upper former vertically uses split bolt pre-buried in bottom concrete as supporting, laterally requires to use U-shaped torr and foot
Hand cradle is connected；
Beam forms
Water intake is horizontal, longeron sectional dimension is 700 × 500mm, as a example by the beam template of bottom, water intake inside.Side form and the end
Mould all uses bright finish bamboo slab rubber.The side form three double scaffolds in road behind are made horizontal stupefied, split bolt+chevron fastener (spacing 500mm)
Reinforcing, bed die is laid on elongated scaffold (scaffold is erected in two side legs hand cradle), scaffold spacing 30cm.Formwork support arrangement
Shi Xianzhi founds support system.Support system is all made up of scaffold.Support whole crossbeam by scaffold, control crossbeam simultaneously
Absolute altitude.
Column template
Water intake inside and outside column sectional dimension is divided into two kinds.Internal upright sectional dimension is 500 × 500mm, outside four corner posts
Sectional dimension is 450 × 450mm.Template uses bright finish bamboo slab rubber, presss from both sides wrap type structure.Bag sheet spacing 500mm twice, to drawing, are wrapped
Sheet carries out consolidation process by timber wedge.Outer column form technology is identical with inner column.
D) built-in fitting makes
1. water hole (ground floor)
Water hole is embedded among end wall eight word, uses φ 150mmPVC pipe to process, and single water intake needs pre-buried 4, altogether
12.The long 500mm of pvc pipe, is positioned at cross wall, pipe lower limb distance water intake base plate 30cm.
2. water intake bottom windows pre-buried Φ 20mm bulkhead nut (first and second layer)
Shank of bolt total length 330mm, the long 7cm of bulkhead nut, it is desirable to screw rod enters nut 35mm.Bulkhead nut distance edge of window
200mm, spacing 500mm mono-, A type single window pre-buried 32 altogether, Type B single window totally 24,80 altogether, form removal
After, stud bolt ophthalmic needs coating butter, in order to avoid screw rods from rusting can not use.
3. water intake inlet opening (ground floor)
Inlet opening uses φ 140mm steel pipe (wall thickness 10mm) to process, band seal plate and iron plate, seal plate and steel pipe full weld,
Prevent permeable.
4. water inlet pipe valve controls bar built-in fitting (second and third, four layers)
50 angle steel and 12mm round steel is used to process, the long 300mm of angle steel, the long 350mm of round steel.
5. lifting pin (third layer) uses φ 160mm steel column to process, and middle part band seal plate exposes 150mm.
Full weld between seal plate and pin is waterproof.Each water intake buries 4 underground, totally 12.
6. chlorination pipe preformed hole (second layer)
Chlorination pipe preformed hole is processed by internal diameter 300mmpvc pipe, pipe range 440mm.First chlorination pipe of each water intaking is reserved
Hole, arranges 3 altogether.
7. chlorination pipe carrier (second layer)
Bracket built-in fitting is processed by 500 × 100 × 10mm steel plate, and bottom is welded with the claw that 16mm round steel processes.Often
Individual water intake has 16 bracket built-in fittings, totally 48.
8. water intake top window pre-buried Φ 20mm bulkhead nut (the 4th layer)
Concrete form is with bottom windows bulkhead nut, A type water intake single window totally 32, totally 256, A type；Type B water intake list
Individual window totally 30, Type B totally 240.
9. pre-buried stake of leading a cow at water intake end face corner, Φ 25 reinforcing bar suspension ring.
E) scaffold makes
Scaffold is divided into inside and outside scaffold two parts；
Wherein, outside scaffolding version is double totally enclosed type, and scaffold design size is:
Vertical rod: transfer 1.3m, advance 1.5m, adjacent vertical rod joint location should be staggeredly arranged asynchronous away from interior, with close big horizontal stroke
The distance of bar is not preferably greater than 1/3rd of step pitch, and vertical rod and leger must buckle with right-angle coupler, must not every step setting or
Omit；When using double vertical rod, it is necessary to all use fastener to buckle with same leger, only must not buckle one.
Leger: step pitch is 1.5m, the spreading position of upper sheer pole should be staggeredly arranged in different vertical rod advances, with phase
The distance of nearly vertical rod is not more than 1/3rd of advance, and the horizontal departure of same row's leger is not more than this sheet scaffold total length
1/250, and no more than 50mm.
Little cross bar: press close to vertical rod and arrange, take on leger, and buckle with right-angle coupler.Under any circumstance, the most not
The little cross bar as basic boom structural member must be removed.
Bridging: be arranged on the two ends of scaffold.Bridging should contact 3～4 vertical rods, and brace and ground angle are 45 °
～60 °.The brace of bridging, in addition to two ends rotary buckle and the vertical rod of scaffold or leger buckle, should increase therebetween
2 ~ 4 buckle a little.
Wall-connecting piece: require vertical interval 3m, level interval 4.5m is arranged together.
Guardrail and foot guard plate: on the operation layer of paving scaffold board, must be provided with 2 road guardrail and foot guard plates.
2. internal scaffolding: be set to the double frame of multilamellar, the requirement with reference to external scaffolding is set up.
F) water intake encapsulation process
1. window is sealed
Water intake needs submerged caisson under water, and after installation, sea level exceeds water intake end face about 2m.Need water inlet before going out fortune
Mouth, box culvert pipeline docking port, manhole, all open positions such as expose at pipe valve and seal.Water intake to go out the fortune time longer,
To install pipeline with box culvert when water intake is installed under water dock, installation accuracy requires high, and the set-up time is the longest, and have can not be pre-
See factor.So inner inlet amount need to be controlled in time when water intake goes out fortune and installs, constantly pass through setting-out, draw water and adjust
The end absolute altitude of whole water intake, and when hanging floating, steel wire rope can be linked up with inside water intake；In addition batten down plate position is in water intaking
The hydraulic pressure that head is born after installing is very big, and absolute altitude at the bottom of box culvert pipeline docking port batten down plate reaches-12.4m.So close to batten down
Envelope property requires the highest.
Eight, water intake top water inlet in the present embodiment, one, bottom outlet, whole windows carry out encapsulation process.Take
Head edge and cover plate integral cast-in-situ, it is ensured that cover plate tightness.In order to go out fortune install time at any time water intake is carried out setting-out,
Drawing water, when hanging floating, steel wire rope can enter inside water intake and link up with, reserved 1.25 × 1.3m side on the prefabricated cover plate of water intake
Shape hole, around cover plate position of opening, reserved bulkhead nut, is fabricated separately chimney type structure, surfaces when installing water intake, anti-
Only sea water enters.Again by plugging holes after installing.
2. the closure of water inlet
The first, envelope luffer boards quantity: A type water intake needs to seal luffer boards 9 pieces, each Type B water intake needs to seal luffer boards 9 pieces.
The second, the version of envelope storehouse plate:
Envelope plate plate face, storehouse is 10mm steel plate, and cross rib, longitudinal rib use 40# I-steel behind, and longitudinal rib is through without disconnecting, and cross rib disconnects
With longitudinal rib welding.Require that all welding uses full weld.Bottom A type water intake as a example by outlet closure.
3. watertight rubber is fixed
Step one, paste watertight rubber plate in batten down plate periphery and water intake concrete contact site, batten down plate only draws
Water rubber slab position, with angle grinding machine by clean for the polishings such as the dirt above this position, rust.With angle grinding machine by rubber slab and batten down
The sticking veneer polishing of plate is coarse.
Step 2, on batten down plate and rubber slab brushing first pass neoprene, the most dry after brushing second time neoprene, when
Neoprene glue surface is dry, touch when will not touch with one's hand with hands, is attached to by rubber slab on batten down plate.With rubber hammer hammering rubber slab gently, make
It is firm that rubber slab and batten down plate are pasted.
Groove is done in step 3, transverse rubber plate and vertical rubber slab intersection, makes two parts be embedded in together.
Pasting twice rubber bar on step 4, rubber slab, the joint of twice rubber bar staggers more than 3m, rubber bar joint
Being 45 ° of inclined-planes, joint is the most water-tight.
4. envelope luffer boards are installed
Before step one, water inlet window batten down plate are installed, the concrete surface contacted with batten down plate grinding process, concrete surface are carried out
Smooth, without grinding one's teeth, projection etc..
When step 2, prefabricated water intake, by window border 20cm location interval 50cm pre-buried φ 20mm bulkhead nut.Use
The thick rubber slab of wide 200mm of 8mm and the rubber bar of diameter 25 do encapsulant, and sealing plate to ensure that each nut is stubborn when installing
Tightly, it is ensured that the rubber bar of everywhere is all compressed.
5. water inlet window batten down plate Leakage Test
With high pressure water jets water inlet window batten down plate base opening and both sides in water intake, outside water intake, check whether infiltration, batten down
Each end water spraying time of plate is no less than 5 minutes.In water intake external high pressure water jets batten down plate top opening, inside water intake
Check whether infiltration.Lead docking port batten down plate Leakage Test method is ibid.
6. batten down plate water seepage treatment
Analyze seepage part Reason Of Leakange, according to concrete reason determine processing scheme, Reason Of Leakange be usually bolt fastening less than
Position or rubber bar are shifted over two kinds.The former can be processed by further fastening bolt, and the latter is by unloading storehouse, Kaifeng plate again
The methods such as viscous rubber bar or plug cotton blanket process.
7. water intake top blind flange seals
When water intake goes out fortune, installation, reserved 1.25 × 1.3m square opening on the prefabricated cover plate of water intake is reserved big around position of opening
Head nut, is fabricated separately chimney type structure and seals water intake, and when installing water intake, chimney surfaces, and prevents sea water
Enter.
Cover plate top uses chimney type structure to process, and chimney plate face uses 8mm steel plate, uses 10# channel-section steel to do behind
Rib of slab, is all welded as full weld.Fixed with water intake by stud bolt bottom chimney, use between bottom steel plate and water intake
Rubber slab and rubber bar do patching.
3) water intake goes out fortune
A) water intake goes out fortune form and determines
Tradition Large Precast Members go out fortune form be crane ship handling, half latent refute out fortune, slideway rolling goes out fortune or air bag goes out fortune etc.,
But for some without goliath tool and without the prefabricated place of large-scale component, do not possess above-mentioned go out arc manipulation part place, can adopt
Hang floating form with crane ship, utilize power of hanging and the water intake natural buoyancy of crane ship, make water intake drinking water meet and arc manipulation part.
B) water intake goes out to transport navigation channel
When calculating water intake goes out to transport, A type water intake drinking water 5.6m, Type B water intake drinking water 5.8m.Owing to water intake engineering is waterborne
Construction section has carried out box culvert installation, and has installed the box culvert section depth of water and can not meet water intake and go out fortune, so utilizing box culvert avris to take
Water base groove carries out water intake and goes out fortune.It is as follows that water intake goes out to transport navigation channel plane arrangement structure: 0-80m～0-170m is water intaking foundation trench,
End absolute altitude is-6.5m；0-170m～0-198m is slanted channel, and end absolute altitude is-6.5m, has installed box culvert at 0-198m；0-
198m～0-640m for install box culvert sideline to west side 16m scope, absolute altitude-7.0m at the bottom of this region；0-640～0-966m is for pacify
Above vanning is contained, absolute altitude of the highest end, this region is-7.0m.
C) water intake goes out fortune, installs
1. crane ship hook
The outside hook of water intake: outside needs to carry out linking up with operation by Divers, and diver wears heavily to dive and equips into water, passes through
Refuting upper personnel with side to link up and carry out commander side and refute loop wheel machine and transferred to pin by steel wire rope, steel wire rope is pushed suspension centre and keeps off by diver
Intralaminar part, loop wheel machine boom hoist cable is refuted by commander side；
Drawing water inside water intake to exposing pin, loop wheel machine is refuted by internal for water intake 4 pieces points of ropes down to pin by lifting staffing side
Place, steel wire rope down at pin, is pushed at suspension centre by lifting personnel by cat ladder within water intake；
After steel wire hang completes, top, together with chimney colligation, is stayed after position completes until crane ship, by steel wire rope and crane ship
Main rope is connected by 55t snap ring.
2. water intake draws water floating
When water intake draws water to internal depth of water 2.5m, crane ship slowly hooks up, and is sling by water intake, now hangs power A about 82t, and B is about
91t；If exist water intake prefabricated time have sticky end phenomenon, water intake cannot be sling by crane ship, then continue to draw water, when in water intake
When portion's water often reduces 15cm, crane ship lifts by crane once；After water intake is sling, continuing to draw water, crane ship is followed to draw water and is slowly carried
Hanging power, must not make steel wire rope release and come off, until having drawn water.
Crane ship is afterburning, and controlling the drinking water of A water intake is 5.6m, hangs power 176t；The B water intake drinking water 5.8m power of hanging is 176t.
3. water intake goes out fortune operation
Step one, crane ship strand anchor hangs emersion fortune.
Go stone to draw water after floating completes, be 16m owing to water intake goes out to transport channel span, it is necessary to assure water intake travels across
Journey is advanced in navigation channel always, so the mode using self anchor hawser of crane ship twist to move carries out water intake goes out fortune.
The long 300m of hawser before crane ship, the long 300m of front anchor line, the long 500m of rear anchor line, and water intake displacement is about 900m, need to go out
During fortune, re-start receipts anchor, put anchor.
Step 2, go out fortune during water intake temporary storage point
Going out to transport 0-250m position, navigation channel and 0-500m position is done jackstone and processed before going out fortune, interim during going out fortune as water intake
Park a little.Crane ship goes out after fortune moves to this position, and crane ship needs again to cast anchor, and is now put down by water intake, light touch
Then four mouthfuls of anchor hawsers are packed up, are thrown down by bedding successively, and complete crane ship stays position again, proceeds fortune.
Step 3, measurement and positioning
During water intake goes out fortune, survey crew needs whole process to position on water intake, commands lifting by transmitter receiver
The direct of travel of ship, it is ensured that crane ship is advanced in navigation channel, to avoid water intake and removes out wan access, and stranded feelings occur
Condition.
Step 4, the guarantee of lift heavy
Because the maximum lift heavy of crane ship is 230t, before going out to transport water intake, to calculate water intake normally advance time in
Portion's water level is marked, and during going out fortune, the moment is observed water intake water level inside and utilizes water pump setting-out, adjustment water intaking of drawing water
Water level in head, allows within the draft: range that water intake requiring always, and disclosure satisfy that the lift heavy scope of crane ship.
4. water intake is installed
Step one, water intake are transferred
Water intake moves to installation site, slowly transfers crane ship suspension hook, until the crane ship power of hanging is about about 30t, stops
Transferring suspension hook, then utilize water pump water filling in water intake, water intake continues to decline, until the crane ship power of hanging is about a 170t left side
The right side, repeats to transfer suspension hook, water filling.
Step 2, water intake are installed
In time transferring distance rubble-mound foundation 50cm to water intake, stop water filling, now by setting-out, draw water, it is ensured that crane ship hangs
Power about 100t, survey crew is accurately positioned, and strand anchor moves the ship position with adjustment water intake, by adjustment caisson end face two
Root intersects cable of leading a cow to adjust torsional angle, and position and misalignment of axe are transferred to bedding after meeting the requirements.
Step 3, measurement repetition measurement
After water intake installation, again measuring the off normal at mounted four angles of water intake, pile No. with GPS, qualified rear pressure is full
Water, if defective needs draw water, repeats water intake installation process, till qualified.
The inventive method is applicable to locality does not has the prefabricated place of large-scale component and without large-scale crane ship machine, utilizes project under construction
Successfully carry out water intake Precast Caisson, go out fortune, installation.Ensureing that water intake caisson goes out fortune safety and is effectively improved construction quality
Under premise, organized by reasonable construction, effectively utilize project under construction foundation trench as prefabricated place, utilize existing ship machine equipment to carry out
Go out fortune, installment work, reduce input to greatest extent to the greatest extent, complete as scheduled for the overall duration and won the quality time, create bigger
Benefit.
Original design water intaking box culvert land and water switching phase is positioned at land, and the side depth of water that borders on the sea is shallower, and rock stratum is thicker, it is impossible to meet boats and ships
Draft requirement, installing box culvert needs to excavate navigation channel, and reef explosion amount is big, costly, therefore use at distance coastline 100m and
Setting up first phase Temporary Cofferdam between coastline, cofferdam is drawn water complete after possessing dry operating condition, and in cofferdam, construction section waterborne is pre-
Box culvert processed becomes land cast-in-place construction.After engineering construction, respond well, considerably increase economic benefit, save the duration.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent or the improvement etc. made within god and principle, should be included in protection scope of the present invention.
Claims (8)
1. a water intake caisson hang floating construction method, it is characterised in that comprise the following steps:
1) water intake is prefabricated: tire of the prefabricated end, formed reinforcing steel bars, and plank sheathing makes, and built-in fitting makes, and scaffold makes and water intake
Encapsulation process；
2) water intake goes out fortune: water intake goes out fortune form and determines, water intake goes out to transport the determination in navigation channel, and water intake goes out fortune, installs.
A kind of water intake caisson the most according to claim 1 hang floating construction method, it is characterised in that described step 1)
The most also include that the construction of Temporary Cofferdam, the construction of described Temporary Cofferdam include pushing away to fill out mountain rock ballast, push away and fill out yellow clay barricade, existing
Have termination, cofferdam to remove, geomembrane processes and draws water in laying, backfill sand and cofferdam.
A kind of water intake caisson the most according to claim 1 hang floating construction method, it is characterised in that described step 1)
In formed reinforcing steel bars specifically include: end tire process and reinforcing bar binding.
A kind of water intake caisson the most according to claim 3 hang floating construction method, it is characterised in that described plank sheathing
Making specifically includes: wall form, beam forms, column template operation.
A kind of water intake caisson the most according to claim 4 hang floating construction method, it is characterised in that described built-in fitting
Making specifically includes:
1. water hole
Water hole is embedded among end wall eight word, uses φ 150mm pvc pipe to process, pre-buried 4 of single water intake, and totally 12
Individual, the long 500mm of pvc pipe, it is positioned at cross wall, pipe lower limb distance water intake base plate 30cm；
2. water intake bottom windows pre-buried Φ 20mm bulkhead nut
Shank of bolt total length 330mm, the long 7cm of bulkhead nut, screw rod enters nut 35mm, bulkhead nut distance edge of window 200mm,
Away from 500mm mono-, A type single window pre-buried 32 altogether, Type B single window totally 24,80 altogether, after form removal, major part
Bolt eye domestic demand coating butter；
3. water intake inlet opening
Inlet opening uses φ 140mm steel pipe to process, band seal plate and iron plate, seal plate and steel pipe full weld；
4. water inlet pipe valve controls bar built-in fitting
50 angle steel and 12mm round steel is used to process, the long 300mm of angle steel, the long 350mm of round steel；
5. lifting pin uses φ 160mm steel column to process, and middle part band seal plate exposes 150mm；
Full weld between seal plate and pin, waterproof, each water intake buries 4 underground, totally 12；
6. chlorination pipe preformed hole
Chlorination pipe preformed hole is processed by internal diameter 300mmpvc pipe, pipe range 440mm.
First chlorination pipe preformed hole of the most each water intaking, arranges 3 altogether；
7. chlorination pipe carrier
Bracket built-in fitting is processed by 500 × 100 × 10mm steel plate, and bottom is welded with the claw that 16mm round steel processes, often
Individual water intake has 16 bracket built-in fittings, totally 48；
8. water intake top window pre-buried Φ 20mm bulkhead nut
A type water intake single window with 32, totally 256, A type；Type B water intake single window with 30, Type B totally 240；
9. pre-buried stake of leading a cow at water intake end face corner, Φ 25 reinforcing bar suspension ring.
A kind of water intake caisson the most according to claim 1 hang floating construction method, it is characterised in that described step 1)
In water intake encapsulation process specifically include: envelope window, the closure of water inlet, watertight rubber fix, seals luffer boards installs, water inlet window envelope
Deck board Leakage Test, batten down plate water seepage treatment and water intake top blind flange seal；
Described watertight rubber is fixed and is included following operation:
Step one, paste watertight rubber plate in batten down plate periphery and water intake concrete contact site, batten down plate only draws
Water rubber slab position, with angle grinding machine by clean for the polishings such as the dirt above this position, rust, with angle grinding machine by rubber slab and batten down
The sticking veneer polishing of plate is coarse；
Step 2, on batten down plate and rubber slab brushing first pass neoprene, the most dry after brushing second time neoprene, by rubber
Plate is attached on batten down plate, with rubber hammer hammering rubber slab gently, makes rubber slab and batten down plate paste firm；
Groove is done in step 3, transverse rubber plate and vertical rubber slab intersection, makes two parts be embedded in together；
Pasting twice rubber bar on step 4, rubber slab, the joint of twice rubber bar staggers more than 3m, and rubber bar joint is
45 ° of inclined-planes, joint is the most water-tight.
A kind of water intake caisson the most according to claim 1 hang floating construction method, it is characterised in that described step 2)
In water intake go out fortune, install include crane ship hook, water intake draw water floating, water intake go out fortune operation and water intake install；
Described water intake goes out to transport operation and includes:
Step one, crane ship strand anchor hangs emersion fortune；
Step 2, go out fortune during water intake temporary storage point；
Step 3, measurement and positioning；
Step 4, the guarantee of lift heavy.
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| CN106677258A (en) * | 2017-03-09 | 2017-05-17 | 中交第三航务工程局有限公司 | Installing process of offshore water taking head caisson of power plant |
| CN110185089A (en) * | 2019-06-05 | 2019-08-30 | 中交第三航务工程局有限公司南京分公司 | Large-scale water intake caisson placing and location control technique |
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