CN107012891A - A kind of waterproof method of prefabricated rectangle well room - Google Patents
A kind of waterproof method of prefabricated rectangle well room Download PDFInfo
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- CN107012891A CN107012891A CN201710434065.0A CN201710434065A CN107012891A CN 107012891 A CN107012891 A CN 107012891A CN 201710434065 A CN201710434065 A CN 201710434065A CN 107012891 A CN107012891 A CN 107012891A
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- well room
- waterproof
- pipeline
- well
- prefabricated
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Classifications
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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
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
-
- 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
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/121—Manhole shafts; Other inspection or access chambers; Accessories therefor characterised by the connection between shaft elements, e.g. of rings forming said shaft
-
- 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
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/125—Manhole shafts; Other inspection or access chambers; Accessories therefor characterised by the lining of the shaft
Abstract
The present invention relates to a kind of waterproof method of prefabricated rectangle well room, comprise the following steps：Step 1: making " cross " mark at hole bottom with lime line, the accurate location of installation is determined；Vertical and horizontal center line and its outer contour are released in shaft bottom；Step 2: lower section well room is installed in place according to line position, is installed between the steel plate on tongue and groove concave surface and put expansion sealing strip；Using polyurethane blending 1 during lower section lifting:2 cement mortar carry out seat slurry thickness 15mm, make above and below two section formed an entirety；Step 3: prefabricated rectangle well room and pipe joint contact surface dabbing, and wound, extrusion pipe makes waterproof mortar be connected closely knit with pipeline, be defined so that mortar is excessive with spunyarn；Step 4: pipeline both sides and top are filled up with waterproof mortar respectively, waterproof mortar is plugged and pounded until completely full.The waterproof method effect of the present invention substantially, is worthy of popularization.
Description
Technical field
The invention belongs to prefabricated rectangle well field, and in particular to a kind of waterproof method of prefabricated rectangle well room.
Background technology
Current Building Trade in China main structure construction is in addition to steel construction and masonry structure, and most of is all concrete knot
Structure.In terms of the situation that Our Country Primary Cities are fed back, the share that precast concrete commercially occupies is considerably less, at present only
Precast curb, prefabricated pavement bricks are used in municipal field.Under new environment in addition to the novel prefabricated components such as shield duct piece, its
He has received much concern in the research and development of pre-manufactured product.
China's urban infrastructure industrialization receives unprecedented concern, and the implementation of industrialization depends on city's political and ideological work
The raising of the raising of industry level, especially precast concrete manufacturing capacity and level.The inspection shaft of China uses clay
Brick is made, low intensity, leakage height, poor durability, and common diameter D1000mm circular inspection well construction periods are generally 2-3 days,
The bigger inspection shaft cycle is longer, is that urban transportation brings adverse effect, the condition of construction for receiving well is same.
Although there is the prefabricated components of some new high-quality in recent years, most of component factories are still produced with traditional standardized
Based on product.The production technology relative maturity of these products, is easily imitated, and causes advanced enterprise not have rational profit, lacks
The power of weary innovation.Under this trend, how we go the more pre-manufactured products of developmental research, to meet urban development process
With the realization of infrastructure provision.
The content of the invention
In order to solve the seepy question of prefabricated assembled rectangular well room, the invention provides a kind of the anti-of prefabricated rectangle well room
Water method.The technical problem to be solved in the present invention is achieved through the following technical solutions：
A kind of waterproof method of prefabricated rectangle well room, comprises the following steps：
Step 1: repetition measurement working pit bottom foundation elevation, transverse and longitudinal line position, and make " cross " mark at hole bottom with lime line
Note, determines the accurate location of installation；Vertical and horizontal center line and its outer contour are released in shaft bottom, for suspender in lifting
When alignd with the center line of well room；
Step 2: lower section well room is installed in place according to line position, is installed between the steel plate on tongue and groove concave surface and put expansion sealing strip,
The expansion sealing strip is used to stitching portion between two section well rooms is played a part of blocking water；Using polyurethane blending 1 during lower section lifting:
2 cement mortar carry out seat slurry thickness 15mm, make above and below two section formed an entirety；
Step 3: prefabricated rectangle well room and pipe joint contact surface dabbing, before pipeline puts in well room, in preformed hole bottom
120 ° of scope inner seats 1:2 waterproof mortars, thick 10-15mm, and wound with spunyarn, extrusion pipe makes waterproof mortar be connected close with pipeline
It is real, it is defined so that mortar is excessive；
Step 4: pipeline both sides and top are filled up with waterproof mortar respectively, waterproof mortar is plugged and pounded until completely full, most
Afterwards triangular shape waterproof mortar, width 5cm are smeared out in pipeline and well room junction.
A kind of waterproof method of above-mentioned prefabricated rectangle well room, the step 4 also includes：After well room is assembled, pipeline is checked
With the gap between rectangular well room, meet gap of the pipeline with well room more than 4cm and blocked using C35 fine-stone concretes.
A kind of waterproof method of above-mentioned prefabricated rectangle well room, a kind of process of suspender selection of the step is：
1) according to used in rectangular well room concrete label and quantity, calculate rectangular well room institute with reference to the Unit Weight of concrete
With the weight of concrete, number of steel bars, species according to used in rectangular well room calculate the weight of reinforcing bar used in rectangular well room；
Wherein：
G is total=G concrete+G steel,
Two save each heavy=G always/2 up and down；
2) according to step 1) result that calculates, with reference to crane performance parameter table, select the model of crane；And according to N=K1*
G/n*1/Sinα≤P/K2Calculate in lineoutofservice signal pull, formula：
The rope rigs of N-every by pulling force；G-beam slab quality half；N-hoist cable radical；α-sling cable with
Plate-girder horizontal sextant angle；The rupture pull force of P-sling cable；Dynamic load factor during K1-lifting, takes 1.2；K2-sling cable
Safety coefficient, take 6；
3) maximum load capacity of pulling force and snap ring when lifting quality maximum support is compared, if lifting quality maximum branch
The maximum load capacity of pulling force ＜ snap rings during support, then the suspender is suitable, wherein：
Square of the permission load x Snap ring diameters of maximum load capacity=snap ring of snap ring.
Beneficial effects of the present invention：
The well room overall performance of the present invention is good, well room ne-leakage phenomenon, therefore, and the present invention is when prefabricated rectangle well is installed pair
Draw at bolt, at tongue and groove, the processing of pipeline and inspection shaft seam crossing in place, closed-water test is qualified, therefore, waterproof side of the invention
Method effect substantially, is worthy of popularization.
The present invention is described in further details below with reference to drawings and Examples.
Brief description of the drawings
Fig. 1 is that the present invention makes place leveling schematic diagram.
Fig. 2 is site layout project figure in processing district of the present invention.
Fig. 3 is template-setup unwrapping wire schematic diagram one.
Fig. 4 is template-setup unwrapping wire schematic diagram two.
Fig. 5 is lower section template-setup schematic diagram.
Fig. 6 is the cat ladder preformed hole schematic diagram in template.
Fig. 7 is the structural representation of preformed hole.
Fig. 8 is formwork support structure schematic diagram.
Fig. 9 is hole for hoist schematic diagram one.
Figure 10 is hole for hoist schematic diagram two.
Figure 11 is hole for hoist detail drawing.
Figure 12 is tongue and groove organigram.
Stress sketch when Figure 13 is truck crane work.
In figure：110th, lower section well room built-in fitting；120th, lower section end template；210th, semicircle reinforced concrete pipe；220th, flexible backplate；
10、Split bolt@450x450；20th, 60x90 flitches@300；30th, steel pipe scaffolding (double)@450；40th, plank sheathing.
Embodiment
Reach technological means and effect that predetermined purpose is taken for the present invention is expanded on further, below in conjunction with accompanying drawing and reality
Embodiment, architectural feature and its effect of example to the present invention are applied, is described in detail as follows.
When a Wu Sanqijin factories main engineering enters duration key point, normal construction order can not substantially meet positive normal open
Water condition, my company proposes the thinking of prefabricated well room, i.e., carried out simultaneously with mechanical jacking, is had based on Prefabricated Concrete inspection shaft overall
Performance is good, the characteristics of being easy to lifting, high effect, and the later stage, other inspection shaft one-levels or two grades of well rooms were using prefabricated in addition to W43,46
Assembled inspection shaft.
Caliber D ＞ 1200mm precast inspection well atlas is not directed in investigation 06MS201-5, investigation 05S531 atlas is to existing
Structure design maximum magnitude is poured in view of caliber D=2000mm, i.e., no matter cast-in-place structural or precast construction, for this engineering pipe
D2600mm corresponding inspection shaft atlas in footpath is blank.The present embodiment to the inspection shaft form corresponding to this D2600mm caliber,
Processing is prefabricated and installation is researched and developed.
According to D2600mm pipeline flows, it is long 2.1m × wide 4.2m × high 4.6m, interior chi that design drawing, which gives inspection shaft size,
Very little is 3.6m × 1.5m, wherein wall thickness 30cm.Block design is carried out to D1000-D1200 caliber prefabricated well room, with pipe
Split for boundary, band tongue and groove form, the total high 4.6m in well room, this is also to take block design, be divided to above and below two save, with Guan Zhongwei circle.
First segment is 2.06 meters high below in pipe, and second section is 2.54 meters high for the above and top plate in pipe；Consider the entirety of precast inspection well
Property, lower section well room band bottom plate.
The prefabricated flow in well room：Prefabricated place election → stencil design → steel bar meter, installation → cat ladder installation → hole for hoist
Setting → model sheetinstallat, reinforcing → concreting → form removal, health.After the completion of lower half-section construction, in this, as basis, then
Half-section is constructed in progress.
Place is more flexible, can choose precast plant's production, vacant lot rational position can also produce at the construction field (site).This
One dirty three phases project is to produce prefabricated at the scene, levelling of the land, compacting, and draining is unobstructed, and individually isolates.
1st, the determination in prefabricated place
This prefabricated place election on project management department southern side 50m × 20m asphalt concrete pavement, using hard enclosing carry out every
From and builder's road being set, in manufacturing process and later stage lifting is used.
2nd, the plot that a block length is wider than each 2m of prefabricated well outdoor size is first selected before implementing, its elevation is answered
Survey, and flatness (error is measured with 3m rulers<5mm), with ensure the smooth of prefabricated well room ground contacting portion and installation be followed by
Seam is close, is used on the plot behind the levelling ground of fine sand with plastic sheeting paving (concrete can be avoided to pollute original road surface).
Stencil design
1st, in existing assembling type precast manhole atlas, it is related to caliber D≤1200mm, preferably using steel template, this is also
The inspection shaft size being applicable with pipe with small pipe diameter is fixed；It may be reused after once purchasing, what the characteristics of utilization rate is high was mutually applicable.But
Suitable for Large Diameter Pipeline inspection shaft from design in recent years it can be found that nonstandard well is in the great majority, add cast-in-place structural atlas most
A wide range of only to arrive D2000mm pipelines, this is also that the feature and complexity having in itself with municipal works are determined.It is possible thereby to comprehensive
Close and consider to be directed to the corresponding nonstandard well of Large Diameter Pipeline, prefabricated well room template can contemplate wooden template, while quality assurance, cost
Save.This dirty three phases prefabricated well room is because nonstandard well, and prefabricated to select wooden template, this thinking also can be pre- from now on
The production of factory processed is used.
2nd, template size：The template of lower section well room contains bottom plate, and template processing dimension is according to long 2.1m × wide 4.2m × height
2.6m (contains bottom plate 0.3m), and upper section well room template is free of top plate, and template processing dimension is according to long 2.1m × wide 4.2m × high 2.6m
(containing top plate 0.3m) is made.
3rd, Template Location：Before installation form, unwrapping wire first should be carried out in making region, determine model sheetinstallat position and draw
Line, then underground about 5cm depths are inserted with long 60cm reinforcing bar, the external dimensions of every interval 40cm positioning wells room bottom plate prevents from running
Mould.
4th, the setting of template reserved opening：D2600mm reinforced concrete pipe is cut into wide 30cm two semicircles in advance, made
For the hole internal model of prefabricated well room.
After the completion of bottom plate, by the semicircle of the ready wide 30cm of D2600mm concretes pipe in advance, branch is located at two along duct orientation
End, is used as the semicircle internal model of half-section under prefabricated well room.To ensure the processing of pipeline and well room interface seam, installing in semicircle
During mould, thickness 1cm after the bamboo slab rubber thickness 1cm (having certain flexibility flexible) wide with 30cm plus cystosepiment are compacted on the outside of semicircle
Wrap up one layer along the direction of outer semicircle, make external diameter 3.12m of the semicircle of moulding by casting than D2600mm mono- week it is major go out 2cm, just
Phase Processing Interface after an action of the bowels.
After the completion of half-section is prefabricated under well room, the reserved opening of upper half-section is to splice another semicircle in lower half circle, shape
Into after a complete circle, the reinforcing bar formwork supporting plate of half-section in colligation, the male and fomale(M＆F) by the use of lower half-section tongue and groove is looked forward to as upper half-section
The mould of mouth, last pour concrete.
5th, cat ladder position is reserved：According to design drawing, this engineering is full chute, therefore is removed outside whole duct height, cat ladder
Position only considers residual altitude, and this engineering is about 4.6-3.1=1.5 meters.According to cat ladder installation site, reserved in inner template
Mounting hole, it is convenient to install.
6th, template is fixed：Side wall inner and outer template up and down spacing 50cm place reserveCircular hole, long 27cm,Pvc pipe penetrate in the preformed hole on side wall, it is rear to install to drawing water-proof bolt, using to drawing water-proof bolt both to reach
Water-stagnating effect, also acts as the effect of reinforcing template and adjustment template straight cis degree.Form bracing system this only consider the side pressure of concrete
Power is smaller, and shuttering supporting steel pipe and purlin wood are combined, and interior external mold matches somebody with somebody diagonal brace, it is ensured that well cell structure does not run mould.
Built-in fitting processing
1st, the installation of cat ladder：Cat ladder, according to design cat ladder position, is weldingly fixed on steel by this after the completion of reinforcing bar colligation
In muscle mesh sheet.Internal model leakage cat ladder is fixed with iron wire and purlin wood again, it is ensured that cat ladder is unaffected by concrete construction impact, it is ensured that position
Accurately.
2nd, the setting of hole for hoist：Half-section well room and lower half-section well room are respectively away from top plate end and bottom plate end on one-level well room
The pre-buried Φ in bottom in 80cm positions, hole for hoist (15cm × 10cm), in advance pre-buried square steel tube (10cm × 10cm × 8mm), lifting hole(eyelet)
150 steel plates thickness 4mm.Pre-buried lifting hole(eyelet) both sides weld 4 every layer with the stiffeners of Φ 10 and steel bar stress, and 20cm totally 8 long is carried out
Reinforce.Each 4 are saved up and down, are symmetrically installed in hole spacing 90cm in device to hole.
3rd, tongue and groove is set：Stitching portion is set to tongue-and-groove type between two section parts above and below well room, on the reinforcing bar of tongue and groove concave surface
Pre-buried two pieces of 25*15mm steel plate, can guarantee that overlap joint is handled when half-section component is installed.Prefabricated one-level well room concrete construction
Because member height is more than 2 meters, using the method for graded casting, particular order is：First carry out one-level well room
Lower half-section bottom plate cast, after concrete reaches initial set, then carries out side wall cast；The prefabricated of upper half-section directly utilizes enterprise on lower half-section
The male and fomale(M＆F) of mouth is used as the mould of upper half-section tongue and groove, carries out concrete cast.Striking time is true according to same condition and live rebound strength
It is fixed, reach the form removal of design load 80%.After form removal, water-proof bolt is exposed and cut outside wall wall, and dug to the borehole wall into 1cm,
Beat real with the filling of cement asbestos, surface uses 1:The closure of 2 waterproof mortars is wiped one's face.
Prefabricated one-level well room assembling is installed：
One-level well room is lifted
1st, from truck crane lifting construction.It is limited by the field because W49 and W51 working pits size suitable for reading is 6m × 8m,
Crane can only prop up the side for being located at 6 meters of short sides.It is about 4 meters to cheat distance in back gauge well, so the crane radius of clean-up takes 6m, synthesis is examined
Consider the work range of crane, with reference to crane performance parameter table, met and applied from a heavy-duty car crane QY50K truck crane
Work requirement.
50T crane performance parameter tables
2nd, the selection of the instrument such as rigging, snap ring
(1) well room weight is calculated
Concrete quantity is used in well room：C30 concrete 15.7m3, are calculated, G concretes=15.7* by concrete Unit Weight 2.4t/m3
2.4*10=376.8kN.
The number of steel bars used of well room：Wall wall 2846kg, bottom plate 465kg, top plate 308kg.G steel=(2846+465+
308) * 10/1000=36.19KN
G=G concretes+G steel=376.8+36.19=412.99KN
Two save each heavy=412.99/2=206.495KN up and down
(2) lineoutofservice signal pull is calculated
N=K1*G/n*1/Sin α≤P/K2
In formula：The rope rigs of N-every by pulling force；
G-beam slab quality half；
N-hoist cable radical；
α-sling cable and plate-girder horizontal sextant angle；
The rupture pull force of P-sling cable；
Dynamic load factor during K1-lifting, takes 1.2；
The safety coefficient of K2-sling cable, takes 6.
Beam slab quality G=412.99KN, α take 45 °
N=K1*G/n*1/Sin α=1.2*206.495/2/2*1/Sin45 °=87.6KN
Intend selecting 6*37, steel wire rope φ 43mm, Nominal Tensile 1700N/mm2, rupture pull force summation 1185KN.
SP=Ψ Σ Si
The rupture pull force of SP in formula --- steel wire rope, KN；
Σ Si --- the summation of the wire rupture pulling force provided in steel wire cord specification table, KN；
Ψ --- steel wire twisting inequality reduction coefficient, restricts to 6 × 37, Ψ=0.82.
SP=0.82*1185=971.7KN
∵ N=87.6KN<P/K=971.7/6=161.95KN
∴ selects 6*37, steel wire rope φ 43mm, Nominal Tensile 1700N/mm2, rupture pull force summation 1185KN, steel
Cord, which is met, to be required.
(3) selection of snap ring is calculated
Pulling force N=87.6KN, permission load [FK]=40d2 of snap ring when lifting quality maximum support, intend selecting 17.5 types
Snap ring, is looked into《Road and bridge reckoner》15-15 tables learn d=65mm
[FK]=40*652=169KN>Required 87.6KN meeting.
Therefore, using during truck crane select 17.5 type snap rings.
3rd, antidumping is checked
To ensure stabilization of the truck crane in hoisting process, antidumping checking computations need to be carried out, i.e., need to be more than stabilizing moment and incline
Cover torque.Look into《Hoist design specification》Understand：
KGMG+KQMQ+KWMW≥0
KG in formula --- deadweight weight coefficient, takes 1
KQ --- raising load weight coefficient, takes 1.15
KW --- pneumatic load weight coefficient, takes 1
MG, MQ, MW are truck crane deadweight, raising load, pneumatic load to the torque on side of toppling, Nm；
In Figure 12：G --- truck crane is conducted oneself with dignity, and takes 40.4t；
Q --- raising thing weight, takes 18t；
W --- pneumatic load, considers by the 20% of raising thing weight；
A --- truck crane center of gravity to leg is toppled the distance of fulcrum, and supporting leg stretches 6.6m entirely, therefore a takes 3.3m；
R --- the truck crane radius of clean-up, maximum takes 6m；
H --- pneumatic load Resultant force height.
∑ M=KGMG+KQMQ+KWMW
=1 × G × a-1.15 × Q × (R-a) -1 × W × h
=404000 × 3.3-1.15 × 18000 × (6-3.3) -0.2 × 18000 × (2+0.2+0.95/2)=
1267680Nm ＞ 0
Therefore stable sexual satisfaction requirement.
4th, Checking Ground Bearing Capacity
Worst situation is at 3 points and landed when truck crane works, that is, 3 supporting legs support the weight of whole crane
(including deadweight and loading), i.e.,：
In formula：G-truck crane deadweight, takes 50t cranes to check, is 40.4t
The maximum loading (specified loading) of Q-truck crane, is 36t.
Truck crane should be to the pressure of roadbed：
In formula：S-supporting leg point area
Therefore, the requirement of foundation bearing capacity is roadbed not less than 4.24MPa, and after handling when 50t truck cranes work
The requirement of base Design of Bearing Capacity is not less than 30Mpa, therefore meets lifting requirements.
5th, lifting sequence is：One, two section well rooms are adjusted into flat car --- -- half-section --- -- under one-level well room to be installed to install
Half-section on one-level well room
6th, add snap ring rigging to be inserted in the lifting hole(eyelet) of well room with steel wire rope, gunnysack, plank and rubber are padded between hoist cable and well body
Piece etc., in case wearing and tearing hoist cable or crushes well body.Slowly lifting well room to leave bed die certain distance (5-10cm), workman's pad
After the good lumps of wood on formal lifting well room to flat car.It is with guide chain that well body and flat car colligation is firm, lifting ground is directly transported to, is put down
Wooden handcart speed per hour is controlled within 5km/h.
7th, the lifting of well room is using the hanging method for setting lifting hole(eyelet) lashing pocket plate bottom.Prefabricated well room is transported to working position by flat car
Put, catch well body in hoisting point position (at bottom plate about 80cm) with steel wire rope, steel wire rope is 45 °~60 ° with the well body angle of cut, lifting
Shut down to from 5~10cm of flat car, by the colligation of safety-command personnel inspection component whether firm stable, whether hoist cable tense, hang
Whether machine operating is normal, and just continuation is lifted by crane after prefabricated well room is steady.Hoisting process wants holding member level, and raising action is flat
Surely, operational coordination.
The technology its feature compared with traditional brick, cast-in-place inspection shaft, receipts well is as follows：
(1) assembled inspection shaft, receipts well intensity height, good integrity, corrosion-resistant, acid and alkali-resistance, service life is long.Can be effective
Solve brick inspection shaft, receipts well low intensity, the mass defect of poor durability, and reduce rotten eyelet, the well thus triggered in the past
The diseases such as week sinking.
(2) separable assembled structure is used, can all-weather construction, duration shortening.Traditional method is complete in construction Pipe installing
Cheng Houzai is constructed, and manual work time or product maintenance are all sequential analysises, long in time limit；And prefabricated well can root
, just can be with processing and fabricating after design drawing is clear and definite according to geographical environment and engineering specifications, and Fast Installation can be implemented, construction can be saved
Time shortens the main duration, passes through early, slow down traffic pressure.
(3) environmental protection and energy saving.Current clay brick is phased out because of environmental pollution and power saving, and reinforced concrete product is current
Best replacement.Once road drainage is transformed, if prefabricated circular pit shaft, receipts well not up to service life, repeat
Use.
(4) if prefabricated well category batch production is prefabricated, care environments are easily controllable compared to building-site, can ensure to check very well
Well, the intensity for receiving well.In addition prefabricated field voltage etc. is relatively stable, can ensure that vibratory equipment is run very well, it is ensured that prefabricated well
Outward appearance and inherent quality.
(5) post-processing mode at assembled well bore and pipe joint, overcome well cast-in-situ steel reinforced concrete due to
Template and interface spillage problem caused by pipe joint imprecision, effectively prevent leak, with superior watertightness.
(6) ambient adaptability is strong.Stratum including geologic structure complexity, rich groundwater, the advantage than cast-in-place structural is bright
It is aobvious.Inlet for stom water install convenient, saving of work and time, except heavy rain, the four seasons can construct beyond the highest heavens, substantially increase efficiency of construction.
Install one-level well room
1st, 5--10cm is first laid below the effect that ground is uniformly carried, prefabricated assembled concrete inspection shaft room bottom plate to reach
Thick Base with Sand Gravel Cushion.
2nd, before lifting, repetition measurement working pit bottom foundation elevation, transverse and longitudinal line position, and made " cross " at hole bottom with lime line
Mark, determines the accurate location of installation.Vertical and horizontal center line and its outer contour are released in shaft bottom.It is easy in lifting
Alignd with the center line of well room, improve installation accuracy.
3rd, installation process at tongue and groove：
After lower section well room is installed in place according to line position, key point is exactly the processing of seam.Two stitching portions between section well room
Tongue and groove can play a part of above to blocking water, and installed between the steel plate on tongue and groove concave surface and put expansion sealing strip, and poly- ammonia is used during lower section lifting
Ester blending 1:2 cement mortar carry out seat slurry thickness 15mm.Two sections form an entirety above and below making.
4th, pipeline and the connection of one-level well room are handled
Precast inspection well and pipe joint contact surface are intended to dabbing, before pipeline puts in well room, 120 ° of preformed hole bottom
Scope inner seat 1:2 waterproof mortars, thick 10-15mm, and wound with spunyarn, extrusion pipe makes waterproof mortar be connected closely knit with pipeline,
It is defined so that mortar is excessive.Pipeline both sides and top are filled up with waterproof mortar respectively, plug and pound waterproof mortar until completely it is full, most
Afterwards triangular shape waterproof mortar, width 5cm are smeared out in pipeline and well room junction.After well room is assembled, such as pipeline and one-level well room
Gap more than 4cm is blocked using C35 fine-stone concretes.
1. the present embodiment be designed according to the corresponding 2.1*4.2m of D2600mm pipelines rectangle inspection well, it is prefabricated and
Expansion research and development are installed, actual two grades of well rooms are also rectangle prefabricated well room, from current implementation result, the technique final effect is met
Using function, it can promote., can be cast-in-place according to atlas for the prefabricated assembled one-level well room of D1200--D2000mm pipelines
Physical dimension carries out Prefabrication, and the size that can also be given by the nonstandard well of design drawing carries out Prefabrication.D ＞ 2000mm pipelines
Inspection shaft room can be produced in the way of the present embodiment, this has filled up the blank of the prefabricated wells of 06MS201-5.
2nd, the present embodiment solves the value volume and range of product of the various informative sex chromosome mosaicism in one-level well room, effectively reduction inspection shaft mould,
The series of products of system can be formed, are then bound to reach efficient, energy-saving effect with firm mould, so as to reach standard product.
3rd, when buried depth of pipeline is less than 6 meters, one-level well room may be related to threeway, four-way, at this moment will be according to actually examining
Consider reserved opening position.And when buried depth of pipeline is more than 6 meters, set according to pre-buried duct height at present, one-level well room is generally
Rectangle straight line well room, often considers reserved opening two grades of well rooms.
4th, the prefabricated well room of the present embodiment is applicable not only to pipe-jacking project, is also applied for bright fluting pipe trench.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (3)
1. a kind of waterproof method of prefabricated rectangle well room, comprises the following steps：
Step 1: repetition measurement working pit bottom foundation elevation, transverse and longitudinal line position, and " cross " mark is made at hole bottom with lime line,
Determine the accurate location of installation；Vertical and horizontal center line and its outer contour are released in shaft bottom, for suspender in lifting
Alignd with the center line of well room；
Step 2: lower section well room is installed in place according to line position, is installed between the steel plate on tongue and groove concave surface and put expansion sealing strip, this is swollen
Swollen sealing rod is used to stitching portion between two section well rooms is played a part of blocking water；Using polyurethane blending 1 during lower section lifting:2 water
Cement mortar carry out seat slurry thickness 15mm, make above and below two section formed an entirety；
Step 3: prefabricated rectangle well room and pipe joint contact surface dabbing, before pipeline puts in well room, 120 ° of preformed hole bottom
Scope inner seat 1:2 waterproof mortars, thick 10-15mm, and wound with spunyarn, extrusion pipe makes waterproof mortar be connected closely knit with pipeline,
It is defined so that mortar is excessive；
Step 4: pipeline both sides and top are filled up with waterproof mortar respectively, waterproof mortar is plugged and pounded up to completely full, is finally existed
Pipeline smears out triangular shape waterproof mortar, width 5cm with well room junction.
2. a kind of waterproof method of prefabricated rectangle well room as claimed in claim 1, it is characterised in that the step 4 is also wrapped
Include：After well room is assembled, the gap between pipeline and rectangular well room is checked, gap of the pipeline with well room more than 4cm is met thin using C35
Stone concrete is blocked.
3. a kind of waterproof method of prefabricated rectangle well room as claimed in claim 1 or 2, it is characterised in that the step is a kind of
Suspender selection process be：
1) according to used in rectangular well room concrete label and quantity, with reference to used in the Unit Weight of concrete calculates rectangular well room mix
The weight of soil is coagulated, number of steel bars, species according to used in rectangular well room calculate the weight of reinforcing bar used in rectangular well room；
Wherein：
G is total=G concrete+G steel,
Two save each heavy=G always/2 up and down；
2) according to step 1) result that calculates, with reference to crane performance parameter table, select the model of crane；And according to N=K1*G/n*
1/Sinα≤P/K2Calculate in lineoutofservice signal pull, formula：
The rope rigs of N-every by pulling force；G-beam slab quality half；N-hoist cable radical；α-sling cable and plate-girder
Horizontal sextant angle；The rupture pull force of P-sling cable；Dynamic load factor during K1-lifting, takes 1.2；The peace of K2-sling cable
Overall coefficient, takes 6；
3) maximum load capacity of pulling force and snap ring when lifting quality maximum support is compared, if during lifting quality maximum support
The maximum load capacity of pulling force ＜ snap rings, then the suspender is suitable, wherein：
Square of the permission load x Snap ring diameters of maximum load capacity=snap ring of snap ring.
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