CN108643212A - A kind of prefabricated reinforced concrete open caisson construction method - Google Patents
A kind of prefabricated reinforced concrete open caisson construction method Download PDFInfo
- Publication number
- CN108643212A CN108643212A CN201810465938.9A CN201810465938A CN108643212A CN 108643212 A CN108643212 A CN 108643212A CN 201810465938 A CN201810465938 A CN 201810465938A CN 108643212 A CN108643212 A CN 108643212A
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- Prior art keywords
- open caisson
- plate
- reinforced concrete
- longitudinal
- construction method
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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
- E02D23/00—Caissons; Construction or placing of caissons
- E02D23/08—Lowering or sinking caissons
Abstract
The present invention relates to a kind of prefabricated reinforced concrete open caisson construction method, step includes：Prefabricated open caisson plate, the lifting of open caisson plate and splicing, well sinking and bottom sealing.The present invention have easy for construction, the sinking construction period is short, safe, prefabricated open caisson sinking uniform and stable, open caisson manufacture are convenient and efficient, open caisson manufacture when foundation stabilization is simple, controllability is good, heavy elevation is accurate eventually and high efficient construction, it is small using the open caisson monolithic weight of prefabricated spelling, it can be lifted by general tower crane in place.
Description
Technical field
The present invention relates to a kind of prefabricated reinforced concrete open caisson construction methods, belong to sinking well engineering technical field.
Background technology
For general skyscraper, elevator pit is generally below base plate of foundation pit 1.5m~3.0m or so, in this way, elevator pit
The earthwork need to dig less than large-scale excavation bottom plate.Currently, sinking well engineering is constructed, including basement process, installation support pad wood, open caisson system
Work, well sinking and bottom sealing technical process, wherein open caisson manufacture, well sinking and bottom sealing are three critical processes.
Well sinking needs to carry out priority control wherein in sinking well engineering.Open caisson construction especially is carried out under the conditions of flowing plastic state weak soil,
There are the construction problems of many reality, and other than construction safety, operational stability, the site operation period is long, can not also solve
The control problem of the final elevation of open caisson, the practical final elevation of open caisson differ greatly with design requirement, and finally high process control is accurate
Property cause a series of contingency question, or even influence the normal use of open caisson.
Invention content
It is an object of the invention to：The defect for overcoming the above-mentioned prior art proposes that a kind of prefabricated reinforced concrete open caisson is applied
Work method takes the mode of similar open caisson construction to solve using precast rc slab by the opposite connection between prefabricated board
Above-mentioned construction difficult problem.This construction method is constructed better than drop shaft sinking, drop shaft sinking long construction period, and integral prefabricated open caisson weight is big,
More difficult transport is in place, and the method for prefabricated piecemeal spelling solves the difficulty of lifting, convenient and quick construction, and economical and practical.
In order to achieve the above object, a kind of prefabricated reinforced concrete open caisson construction method proposed by the present invention, including following
Step：
Step 1：Prefabrication transverse open caisson plate and longitudinal open caisson plate, the transverse direction open caisson plate left and right ends are provided with the set of opening outwardly
It takes over, the madial wall at the longitudinal direction open caisson plate both ends is provided with the connecting tube for being adapted for insertion into the socket pipe；
Step 2：The wooden a tree, used in making timber for boats of interim support pad is placed in foundation pit soil layer;
Step 3：In place by two pieces of lateral open caisson plate liftings, the transverse direction open caisson plate is oppositely arranged in parallel；
Step 4：Two blocks of longitudinal open caisson plates are lifted respectively to the top of lateral open caisson plate end, after connecting tube is aligned with socket pipe
Longitudinal open caisson plate is fallen, the connecting tube of longitudinal open caisson plate is made to be inserted into socket pipe, so far open caisson plate splicing finishes；
Step 5：The wooden a tree, used in making timber for boats of extraction, carries out the earth excavation inside open caisson, makes well sinking；
Step 6：Well sinking in place after, carry out bottom sealing.
The present invention, which further improves, to be：
1, the madial wall at longitudinal open caisson plate both ends is additionally provided with inner side baffle, and the inner side baffle and connecting tube are from inside to outside
It is set to the homonymy at longitudinal open caisson plate both ends, the inner side baffle is suitable for blocking the madial wall of lateral open caisson plate end, prevent
Lateral open caisson plate tilts during well sinking.
2, well sinking in place after, it is close to carry out filleting to the stitching portion of lateral open caisson plate and longitudinal open caisson plate on the inside of the open caisson
Envelope, the stitching portion refer at the gap between inner side baffle and lateral open caisson plate medial surface.
The present invention is with easy for construction, the sinking construction period is short, safe, prefabricated open caisson sinking uniform and stable, open caisson
Foundation stabilization is simple, controllability is good when quick, open caisson manufacture easy to make, heavy elevation is accurate eventually and high efficient construction.
Description of the drawings
The present invention will be further described below with reference to the drawings.
Fig. 1 is prefabricated reinforced concrete open caisson vertical view.
Fig. 2 is lateral open caisson plate endpoint node.
Fig. 3 is and longitudinal open caisson plate endpoint node.
Fig. 4 is that prefabricated open caisson installs schematic diagram in place.
Fig. 5 is the A-A sectional views of Fig. 4.
Under figure label schematic diagram：
The longitudinal directions 1- open caisson plate；2- transverse direction open caisson plates；3- connecting tubes；The second angle steel of 41-；The first angle steel of 42-；5- socket pipes；51- is led
Entrance；61- horizontal reinforcements；62- vertical reinforcements；7- support scaffoldings；8- wood a tree, used in making timber for boats.
Specific implementation mode
The present invention will be further described in the following with reference to the drawings and specific embodiments.
The present embodiment prefabricated reinforced concrete open caisson construction method, prefabricated reinforced concrete open caisson construction method, including with
Lower step：
Step 1：Prepare prefabricated moulding bed reinforcing bar, prefabricated moulding bed prefab-form.
According to basic soil layer situation and soil condition, the foundation pit of prefabricated hoistway wall is calculated according to the size of basic elevator
Earthwork lateral pressure, by the prefabricated moulding bed arrangement of reinforcement of pit earthwork lateral pressure；Basic tire mold design thickness can consider by 200mm,
It is deeper for elevator pit, it is prefabricated moulding bed that pretensioned prestressing steel wire or steel hinge line conduct can be used when soil layer is stream modeling soil
Arrangement of reinforcement, it is not only economical in this way but also safe and reliable.
Prepare prefabricated moulding bed processing site, prefabricated place, which may be used to be laid with above old template after ground is tamped, spreads plastics
The mode of film directly can also be laid with plastic film on ground loose tool, re-lay precast reinforced, fixed prefab-form, progress
Concreting.
As shown in Figure 1, being prefabricated open caisson schematic top plan view, wherein prefab-form includes：Lateral open caisson plate 2 and longitudinal direction
Open caisson plate 1.Lateral 2 left and right ends of open caisson plate are provided with the socket pipe 5 of opening outwardly, the madial wall at longitudinal 1 both ends of open caisson plate
It is provided with the connecting tube 3 for being adapted for insertion into socket pipe 5 and is suitable for blocking the interior side block of the madial wall of lateral 2 end of open caisson plate
Plate.In figure, 42 be the first angle steel, and 41 be the second angle steel, and the first angle steel 42 is used for installing connecting tube 3, and the second angle steel 41 is as horizontal
To the inner side baffle of open caisson plate 2.
As shown in Fig. 2, for the endpoint node schematic diagram of lateral open caisson plate 2, the step of prefabrication transverse open caisson plate, is as follows：
The horizontal reinforcement 61 and vertical reinforcement 62 of a1, laying for pouring lateral open caisson plate, horizontal reinforcement and vertical reinforcement are in net
Shape is arranged and is bound with reinforcing bar.
A2, vertical socket pipe 5 is welded in the end of horizontal reinforcement 61, socket pipe 5 has elongated notch outwardly, notch
Width is 25-30mm；Introducing port 51 is welded on the top of socket pipe 5, and introducing port 51 is in back taper, lower mouth and 5 top of socket pipe
Docking.
Formwork erection and casting concrete are carried out after a3, acceptance(check), are taken out after waiting concrete to reach design strength prefabricated
Plate is for use.
As shown in figure 3, for the endpoint node schematic diagram of longitudinal open caisson plate 1.The step of prefabricated longitudinal direction open caisson plate, is as follows：
The horizontal reinforcement 61 and vertical reinforcement 62 of b1, laying for pouring longitudinal open caisson plate 1, horizontal reinforcement and vertical reinforcement are in net
Shape is arranged and is bound with reinforcing bar.
B2, it is welded with the first angle steel 42 and the second angle steel 41 from outside to inside in the side of the end of horizontal reinforcement 61, and
Connecting tube on first angle steel 42 on welding connecting tube 3 or the first angle steel is welded in advance, the inside that the second angle steel 41 is used as
Baffle；The effect of inner side baffle ensures the verticality of lateral open caisson plate 2 and avoids 42 lateral bending of the first angle steel.
Formwork erection and casting concrete are carried out after b3, acceptance(check), are taken out after waiting concrete to reach design strength prefabricated
Plate is for use.
Prefabricated open caisson need to be before engineering carries out dewatering construction, and Construction in Preparatory Stage progress is prefabricated, to ensure in base pit dewatering
Earth excavation is carried out when in place to substrate, prepares there can be enough intensity when elevator, sump earth excavation, it is ensured that open caisson
It can be effectively in place；The height of prefabricated open caisson determines according to elevator, catch pit digging depth and the position soil property situation, generally
It is preferably bigger 600~800mm than foundation pit digging depth, to prevent well bottom sludge matter soil antiarch.
Step 2：The wooden a tree, used in making timber for boats 8 of interim support pad is placed in foundation pit soil layer, and sets up temporary support scaffold 7.
After longitudinal open caisson plate 1, lateral 2 intensity of open caisson plate meet design requirement, the sinking construction of prefabricated open caisson can be carried out.
Before sinking, first according to line setting position, the open caisson position line is released on foundation pit soil layer, is calculated according to soil layer, in advance heavy
The wooden a tree, used in making timber for boats 8 of interim support pad is placed under well prefabricated board, the length and spacing of the wooden a tree, used in making timber for boats 8 are according to calculating and setting；Then it is taken at open caisson position
If the temporary support scaffold 7 of prefabricated board locating and submerging, for construction personnel's standing at work and adjustment pre-cast sink well Board position
And verticality.
Step 3：Lifting transverse direction open caisson plate 2.
Two blocks of lateral open caisson plates 2 are lifted in place by vertical transportation machinery.It is in place according to position line, and pass through support leg
Horizontal location steel pipe is set temporarily in hand cradle 7, lateral open caisson plate 2 is accurately positioned.
Step 4：Lifting longitudinal direction open caisson plate 1.
When the top of the longitudinal 1 close transverse direction open caisson plate 2 of open caisson plate of lifting, by manually pushing and pulling longitudinal open caisson plate 1 one first
The connecting tube 3 at end enters in the introducing port 51 of 5 top of socket pipe, and then slight lower longitudinal open caisson plate 1, makes the connection steel of the other side
Pipe 3 also enters in socket pipe introducing port 51, is further continued for transferring longitudinal open caisson plate 1, same method carries out other side longitudinal direction open caisson plate 1
Lifting it is in place.After all prefabricated open caisson plate liftings are in place, the review of position line is carried out, so far open caisson plate splicing finishes.
Step 5：The wooden a tree, used in making timber for boats of extraction, carries out the earth excavation inside open caisson, makes well sinking.
It is gradually spaced extraction to the wooden a tree, used in making timber for boats 8 below prefabricated open caisson plate, after the wooden a tree, used in making timber for boats 8 is completely drawn out, removes medial support foot
Hand cradle 7 divides into load in pre-cast sink well plate upper end, makes four pieces of plate isostatic settlings of open caisson, is coped on the inside of open caisson in sinking watching
Earthwork equilibrium excavate, carry out the earth excavation inside open caisson, first intermediate when earth excavation, the layering of back open caisson plate side is gradually dug
Pick, the earthwork use hand digging, connect earth material bucket by the way of mechanical handling.Often excavate the earthwork on the inside of one section of depth open caisson,
The detection that verticality and the positions Xia Kou are carried out on the inside of open caisson wall need to should just be carried out as found deviation occur according to bias direction
Load and the reinforcing of prefabricated board side make position and vertically accurate of open caisson plate.
Prefabricated open caisson plate can take vertical direction difference position to sink, i.e., first carry out parallel surface both side plate and sink simultaneously, sink deep
Degree is no more than the half height of vertical direction plate, and vertical direction of then sinking can alternately sink.
Internal earth excavation is temporarily ceased when well sinking is to designed elevation about 500mm, static observation continues afterwards for 24 hours,
It so that the position of open caisson and verticality are stablized, can be corrected in time if there is deviation, continue to sink to after amendment predetermined
Elevation location.
Step 6：Well sinking in place after, carry out bottom sealing.
After well sinking to absolute altitude, that is, the back cover of open caisson is carried out, then progress substrate is levelling, carries out the waterproof inside open caisson
Construction, due between prefabricated open caisson plate for socket, may have seam areas infiltration, therefore, well sinking in place after, can adopt
Filleting is carried out to 41 end of the second angle steel of 1 inside of longitudinal open caisson plate and the junction of lateral open caisson plate 2 with leak stopping spirit.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (8)
1. prefabricated reinforced concrete open caisson construction method, comprises the steps of：
Step 1：Prefabrication transverse open caisson plate and longitudinal open caisson plate, the transverse direction open caisson plate left and right ends are provided with the set of opening outwardly
It takes over, the madial wall at the longitudinal direction open caisson plate both ends is provided with the connecting tube for being adapted for insertion into the socket pipe；
Step 2：The wooden a tree, used in making timber for boats of interim support pad is placed in foundation pit soil layer;
Step 3：In place by two pieces of lateral open caisson plate liftings, the transverse direction open caisson plate is oppositely arranged in parallel；
Step 4：Two blocks of longitudinal open caisson plates are lifted respectively to the top of lateral open caisson plate end, after connecting tube is aligned with socket pipe
Longitudinal open caisson plate is fallen, the connecting tube of longitudinal open caisson plate is made to be inserted into socket pipe, so far open caisson plate splicing finishes；
Step 5：The wooden a tree, used in making timber for boats of extraction, carries out the earth excavation inside open caisson, makes well sinking；
Step 6：Well sinking in place after, carry out bottom sealing.
2. prefabricated reinforced concrete open caisson construction method according to claim 1, it is characterised in that：The longitudinal direction open caisson plate
The madial wall at both ends is additionally provided with inner side baffle, and the inner side baffle and connecting tube are set to longitudinal open caisson plate both ends from inside to outside
Homonymy, the inner side baffle is suitable for blocking the madial wall of lateral open caisson plate end, and it is laterally heavy during well sinking to prevent
Well plate tilts.
3. prefabricated reinforced concrete open caisson construction method according to claim 2, it is characterised in that：Prefabrication transverse open caisson plate
The step of it is as follows：
The horizontal reinforcement and vertical reinforcement of a1, laying for pouring lateral open caisson plate, the horizontal reinforcement and vertical reinforcement are in net
Shape is arranged；
A2, vertical socket pipe is welded in the end of horizontal reinforcement, socket pipe has opening outwardly；
Then a3, supporting module carry out concreting.
4. prefabricated reinforced concrete open caisson construction method according to claim 2, it is characterised in that：Prefabricated longitudinal direction open caisson plate
The step of it is as follows：
The horizontal reinforcement and vertical reinforcement of b1, laying for pouring longitudinal open caisson plate, the horizontal reinforcement and vertical reinforcement are in net
Shape is arranged；
B2, it is welded with the first angle steel and the second angle steel from outside to inside in the side of the end of horizontal reinforcement, and on the first angle steel
Connecting tube on welding connecting tube or the first angle steel is welded in advance, and second angle steel is as the inner side baffle；
Then b3, supporting module carry out concreting.
5. prefabricated reinforced concrete open caisson construction method according to claim 2, it is characterised in that：Well sinking is in place
Afterwards, caulking sealing is carried out to the stitching portion of lateral open caisson plate and longitudinal open caisson plate on the inside of open caisson.
6. prefabricated reinforced concrete open caisson construction method according to claim 5, it is characterised in that：The transverse direction open caisson plate
And the stitching portion of longitudinal open caisson plate refers at gap between inner side baffle and lateral open caisson plate medial surface.
7. prefabricated reinforced concrete open caisson construction method according to claim 1, it is characterised in that：The socket pipe and company
It takes over as pipe or rectangular tube.
8. prefabricated reinforced concrete open caisson construction method according to claim 1, it is characterised in that：The top of the socket pipe
End is provided with the introducing port for being directed into connecting tube in socket pipe, and the introducing port is in back taper, lower mouth and socket
It docks at tube top end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810465938.9A CN108643212A (en) | 2018-05-16 | 2018-05-16 | A kind of prefabricated reinforced concrete open caisson construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810465938.9A CN108643212A (en) | 2018-05-16 | 2018-05-16 | A kind of prefabricated reinforced concrete open caisson construction method |
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| CN201810465938.9A Pending CN108643212A (en) | 2018-05-16 | 2018-05-16 | A kind of prefabricated reinforced concrete open caisson construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163143A (en) * | 2018-10-18 | 2019-01-08 | 中国冶集团有限公司 | A kind of assembled push pipe work open caisson and the construction method using it |
| CN109267749A (en) * | 2018-11-02 | 2019-01-25 | 广东省水利水电第三工程局有限公司 | A kind of concrete prefabricated template construction technique applied to thick mud layer |
| CN110344423A (en) * | 2019-07-12 | 2019-10-18 | 江苏南通二建集团有限公司 | A kind of drop shaft sinking forms the construction method of water level for local deep foundation pit under high water level |
| CN117385915A (en) * | 2023-12-04 | 2024-01-12 | 中交一公局第二工程有限公司 | Modularized open caisson reinforcement cage and open caisson construction method |
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| KR20100096492A (en) * | 2009-02-24 | 2010-09-02 | 방규열 | Structure for civil engineering and construction and structuring method using the same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163143A (en) * | 2018-10-18 | 2019-01-08 | 中国冶集团有限公司 | A kind of assembled push pipe work open caisson and the construction method using it |
| CN109267749A (en) * | 2018-11-02 | 2019-01-25 | 广东省水利水电第三工程局有限公司 | A kind of concrete prefabricated template construction technique applied to thick mud layer |
| CN110344423A (en) * | 2019-07-12 | 2019-10-18 | 江苏南通二建集团有限公司 | A kind of drop shaft sinking forms the construction method of water level for local deep foundation pit under high water level |
| CN117385915A (en) * | 2023-12-04 | 2024-01-12 | 中交一公局第二工程有限公司 | Modularized open caisson reinforcement cage and open caisson construction method |
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Application publication date: 20181012 |