CN107642083A - Post-tensioned prestressed underground continuous wall structure with pull rod and construction method - Google Patents
Post-tensioned prestressed underground continuous wall structure with pull rod and construction method Download PDFInfo
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- CN107642083A CN107642083A CN201711067297.3A CN201711067297A CN107642083A CN 107642083 A CN107642083 A CN 107642083A CN 201711067297 A CN201711067297 A CN 201711067297A CN 107642083 A CN107642083 A CN 107642083A
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- pull bar
- concrete
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- 238000010276 construction Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- 239000004567 concrete Substances 0.000 claims abstract description 31
- 230000002787 reinforcement Effects 0.000 claims abstract description 15
- 238000009412 basement excavation Methods 0.000 claims abstract description 9
- 210000005056 cell body Anatomy 0.000 claims description 11
- 238000009933 burial Methods 0.000 claims description 3
- 239000011083 cement mortar Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 210000003205 muscle Anatomy 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 239000011148 porous material Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a post-tensioned prestressed underground continuous wall structure with a pull rod and a construction method. The prestressed underground continuous wall structure with the pull rod is characterized in that the lower end of a prestressed reinforcement is welded with a rectangular long steel pipe through a circular ring, and the circular ring is positioned inside the rectangular long steel pipe and welded with the rectangular long steel pipe; the lower ends of the prestressed reinforcements are arranged along the length direction of the rectangular long steel pipe and are welded on the rectangular long steel pipe; a base plate is arranged below the rectangular strip steel pipe; after the concrete wall body of the underground continuous wall is poured, fixing the prestressed steel bars at the upper ends of the tensioned prestressed steel bars by adopting a tensioning end anchorage device; one end of the pull rod is connected with a pore channel arranged on the ground, and the other end of the pull rod is arranged and connected with a pull rod fixing anchorage device on the wall body of the underground continuous wall. The invention can reduce the horizontal displacement of the wall body in the engineering of foundation pit excavation, increase the stability of the underground continuous wall, and simultaneously give consideration to the construction cost and the safety of the supporting structure.
Description
Technical field
The present invention relates to a kind of post-tensioned prestressing continuous underground wall structure and construction method with pull bar.
Background technology
Underground continuous wall construction technique is originating from Europe, and the 1950s, this technology was in western developed country, preceding Soviet Union
Connection and Japan are promoted.China in 1958 has built dam cut-pff wall with this technology, and the mid-1970s technique is promoted
It is applied to the industries such as building, colliery and municipal administration.Diaphram wall has to foundation ditch surrounding soil and works shadow because its rigidity is big
The advantages of small is rung, the outer wall of basement that can work as retaining wall or agent structure uses.
With the rapid advances of science and technology and the high speed development of social economy, Large Foundation Pit is to diaphram wall intensity, rigidity
Higher requirement is proposed with durability, in order to meet diaphram wall bearing capacity, deformation and the requirement of Crack Control, underground connects
Sectional dimension, depth and the reinforcing bar amount of continuous wall are constantly increasing.The problem of in general reinforced concrete wall is brought is the water of wall
Prosposition moves past big or even " bulge " quality problems occurs, and amount of reinforcement increases, while continuous wall trench underground construction is difficult
Spending the diaphram wall cost brought therewith can also increase with problem.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of post-tensioned prestressing continuous underground wall structure with pull bar.
The invention solves another technical problem be to provide a kind of post-tensioned prestressing diaphram wall with pull bar
The construction method of structure.
For the post-tensioned prestressing continuous underground wall structure with pull bar, the technical solution adopted by the present invention is, with pull bar
Prestressed underground continuous wall structure, including deformed bar, rectangular slat steel pipe, annulus, backing plate, stretching end anchorage, pull bar are solid
Determine anchorage, pull bar；
The lower end of deformed bar is by annulus and rectangular slat steel-pipe welding, and annulus is located at the interior of rectangular slat steel pipe
Portion and rectangular slat steel-pipe welding；Length direction arrangement of the lower end of more deformed bars along a rectangular slat steel pipe is simultaneously
It is welded on above rectangular slat steel pipe；
Backing plate is provided with below rectangular slat steel pipe；
After the completion of diaphram wall concrete wall pours, the upper end of the deformed bar by tensioning uses stretching end
Anchorage fixes deformed bar；
Duct set by one end and ground of pull bar is connected, and the other end of pull bar is located at and the pull bar on diaphram wall wall
Fixed anchorage connection.
Preferably, before diaphram wall concrete wall pours, bellows is also cased with outside deformed bar, and
The periphery of bellows is covered with the steel reinforcement cage for pouring diaphram wall concrete wall.
Preferably, after the completion of diaphram wall concrete wall pours, with grout filling after bellows is taken out
The gap left around deformed bar, and will provided with stretching end anchorage on the top of diaphram wall concrete wall
The upper end of deformed bar is fixed.
For the construction method of the post-tensioned prestressing diaphram wall with pull bar, the technical solution adopted by the present invention is to wrap
Include following steps：
(1) grooving construction is carried out by the design size of diaphram wall, dug to pull bar design attitude reserving hole channel；
(2) continue to be excavated to suitable depth downwards according to design size position in the cell body bottom of excavation, form one section
Small cell body, place backing plate；
(3) annulus in deformed bar and rectangular slat steel pipe is welded to form entirety, the surface cover outside deformed bar
Laying is fixed in steel reinforcement cage after upper bellows；
(4) it is placed on after secondary pile hole cleaning by design attitude lifting steel reinforcement cage in the cell body excavated, and by rectangular slat
Steel pipe, which is placed in, to be had been placed on above the backing plate in sulculus body；
(5) concreting is first used again after forming intensity to casting concrete in the following sulculus body in diaphram wall bottom
The wall of diaphram wall；The grade for pouring the concrete of small cell body is higher than the concrete grade for pouring diaphram wall cell body；
(6) after diaphram wall completion wall pours, jack tension deformed bar is set up on wall top, treats pre- answer
After the completion of power reinforced bar stretching, bellows of the extraction cover outside deformed bar, and in deformed bar after bellows is taken out
The gap that surrounding leaves pours into cement mortar, then is fixed with the stretching end anchorage for being located in the ground continuous wall concrete wall top
Deformed bar, and sealed with concrete；
(7) excavation of foundation pit places pull bar, and by the other end of pull bar and be fixed on underground company to pull bar duct burial place
Pull bar on continuous wall concrete wall fixes anchorage connection.
The beneficial effects of the invention are as follows：
The present invention has given full play to deformed bar and two kinds of material characteristicses of concrete, and it is big to form a kind of rigidity, cracking resistance energy
The outstanding Novel underground diaphragm wall of power, can in the engineering of excavation of foundation pit due to the effect of diaphragm wall deformed bar and pull bar
To reduce the horizontal displacement of wall, increase the stability of diaphram wall so as to reduce amount of reinforcement and reduce diaphram wall
Thickness, the security of construction cost and supporting construction is taken into account.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is the front view of the embodiment of the present invention.
Fig. 2 is the right view of the embodiment of the present invention.
Fig. 3 is the steel reinforcement cage binding structure figure of the embodiment of the present invention.
Marked in figure：1- diaphram walls, 2- bellowss, 3- deformed bars, 4- rectangular slat steel pipes, 5- annulus, 6-
Backing plate, 7- stretching end anchorages, 8- pull bar anchorages, 9- pull bars, 10- steel reinforcement cages.
Embodiment
Fig. 1 is a kind of prestressed underground continuous wall structure with pull bar, by deformed bar 3, rectangular slat steel pipe 4, circle
Ring 5, backing plate 6, prestressing force pull end anchorage 7, pull bar fix anchorage 8, pull bar 9 is formed.
Using post-tensioning hair tension reinforcing steel bar, fixing end (lower end) and the rectangular slat steel pipe 4 of deformed bar 3 weld prestressing force
Together, steel duct has annulus 6 to weld together with deformed bar, bellows 3 on deformed bar overcoat.
In fig. 2, length direction of the lower end of more deformed bars along a rectangular slat steel pipe is arranged and welded
Above rectangular slat steel pipe.
A backing plate 6 is provided with below rectangular slat steel pipe.The placement direction of rectangular slat steel pipe and backing plate i.e. and ground
The wall length direction of lower diaphragm wall is consistent.
In figure 3, before the concrete wall of diaphram wall 1 pours, temporarily it is cased with the outside of every deformed bar 3
A piece bellows 2, and it is covered with the periphery of bellows the steel reinforcement cage 10 for pouring diaphram wall concrete wall.
After the completion of continuous wall concrete wall pours when underground, i.e., tensioning is carried out using jack pair deformed bar 3,
Bellows is taken out after the completion of drawing and with grout filling around deformed bar, and in diaphram wall concrete walls
The upper end of deformed bar 3 is fixed using stretching end anchorage 7 in the top of body.
Duct set by one end and ground of pull bar 9 is connected, and the other end of pull bar is located at and the drawing on diaphram wall wall
Bar is fixed anchorage 8 and connected.
The above-mentioned prestressed underground continuous wall structure with pull bar, in Specific construction it is noted that following item：
1st, certain depth is excavated downwards according to design size position, continuation after digging to bottom land in trenching construction.In groove
Dig out the small cell body of one section of long cube in beneath end.Fixing end backing plate 6 can be first placed after grooving, by deformed bar 3, annulus 4 with
Rectangular slat steel pipe 5 is welded as a whole after structure again together with steel reinforcement cage 10 in banding fixed and standing groove.
2nd, dug in the trenching construction of diaphram wall to the design attitude of pull bar and carry out pull bar duct excavation, it is laggard
Row concreting pours, it is desirable to which the concrete grade that small cell body pours is higher than the concrete grade of underground continuous wall groove body.
3rd, after the concreting for completing diaphram wall 1, jack tension deformed bar is set up on wall top, is treated
After the completion of deformed bar tensioning, the upper end that bellows is poured into cement mortar and deformed bar is fixed with stretching end anchorage 7 is extracted,
Sealed again with concrete.
4th, excavation of foundation pit to pull bar duct burial place places pull bar 9.
In the present embodiment, can be with the engineering of excavation of foundation pit due to the effect of diaphragm wall deformed bar and pull bar
Reduce the horizontal displacement of wall, increase the stability of diaphram wall so as to the thickness for reducing amount of reinforcement with reducing diaphram wall
Degree, has taken into account the security of construction cost and supporting construction.
The embodiments of the present invention described above are not intended to limit the scope of the present invention.It is any in the present invention
Spirit and principle within the modifications, equivalent substitutions and improvements made etc., should be included in the claim protection model of the present invention
Within enclosing.
Claims (4)
1. the prestressed underground continuous wall structure with pull bar, it is characterised in that：Including deformed bar (3), rectangular slat steel pipe
(4), annulus (5), backing plate (6), stretching end anchorage (7), pull bar fix anchorage (8), pull bar (9)；
The lower end of the deformed bar (3) is welded by annulus (5) and rectangular slat steel pipe (4), and annulus is located at rectangle length
The inside of bar steel pipe and rectangular slat steel-pipe welding；Length of the lower end of more deformed bars along a rectangular slat steel pipe
Direction arranges and is welded on above rectangular slat steel pipe；
Backing plate (6) is provided with below the rectangular slat steel pipe；
After the completion of diaphram wall concrete wall pours, the upper end of the deformed bar by tensioning uses stretching end anchorage
(7) deformed bar is fixed；
Duct set by one end and ground of the pull bar (9) connects, the other end of pull bar be located at on diaphram wall wall
Pull bar fixes anchorage (8) connection.
2. prestressed underground continuous wall structure according to claim 1, it is characterised in that：In diaphram wall concrete walls
Before body pours, bellows (2) is also cased with outside the deformed bar (3), and is covered with the periphery of bellows for pouring
The steel reinforcement cage (10) of diaphram wall concrete wall.
3. prestressed underground continuous wall structure according to claim 1, it is characterised in that：In diaphram wall concrete walls
After the completion of body pours, the gap taken out and left after bellows around deformed bar is filled in mud, and in underground
The upper end of deformed bar is fixed provided with stretching end anchorage (7) in the top of continuous wall concrete wall.
4. the construction method of the prestressed underground continuous wall structure with pull bar as claimed in claim 1, comprises the following steps：
(1) grooving construction is carried out by the design size of diaphram wall, dug to pull bar design attitude reserving hole channel；
(2) continue to be excavated to suitable depth downwards according to design size position in the cell body bottom of excavation, form one section of sulculus
Body, place backing plate；
(3) annulus in deformed bar and rectangular slat steel pipe is welded to form entirety, upper ripple is covered outside deformed bar
Laying is fixed in steel reinforcement cage after line pipe；
(4) it is placed on after secondary pile hole cleaning by design attitude lifting steel reinforcement cage in the cell body excavated, and by rectangular slat steel pipe
It is placed in and has been placed on above the backing plate in sulculus body；
(5) concreting underground is first used again after forming intensity to casting concrete in the following sulculus body in diaphram wall bottom
The wall of diaphragm wall；The grade for pouring the concrete of small cell body is higher than the concrete grade for pouring diaphram wall cell body；
(6) after diaphram wall completion wall pours, jack tension deformed bar is set up on wall top, treats prestress steel
After the completion of muscle tensioning, bellows of the extraction cover outside deformed bar, and after bellows is taken out around deformed bar
The gap left pours into cement mortar, then pre- answer is fixed with the stretching end anchorage for being located in the ground continuous wall concrete wall top
Power reinforcing bar, and sealed with concrete；
(7) excavation of foundation pit places pull bar, and by the other end of pull bar and be fixed on diaphram wall to pull bar duct burial place
Pull bar on concrete wall fixes anchorage connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711067297.3A CN107642083A (en) | 2017-11-02 | 2017-11-02 | Post-tensioned prestressed underground continuous wall structure with pull rod and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711067297.3A CN107642083A (en) | 2017-11-02 | 2017-11-02 | Post-tensioned prestressed underground continuous wall structure with pull rod and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN107642083A true CN107642083A (en) | 2018-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711067297.3A Pending CN107642083A (en) | 2017-11-02 | 2017-11-02 | Post-tensioned prestressed underground continuous wall structure with pull rod and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374409A (en) * | 2018-05-07 | 2018-08-07 | 河南城建学院 | A kind of prefabricated prestressed underground continuous wall |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726495A (en) * | 2014-01-10 | 2014-04-16 | 上海建工五建集团有限公司 | Offshore deep foundation pit supporting structure and construction method thereof |
| CN103835311A (en) * | 2014-02-25 | 2014-06-04 | 中交第一航务工程勘察设计院有限公司 | Post-tensioned prestressing underground diaphragm wall and construction method |
| CN207633325U (en) * | 2017-11-02 | 2018-07-20 | 安徽建筑大学 | Post-tensioned prestressing underground continuous wall structure with pull rod |
-
2017
- 2017-11-02 CN CN201711067297.3A patent/CN107642083A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726495A (en) * | 2014-01-10 | 2014-04-16 | 上海建工五建集团有限公司 | Offshore deep foundation pit supporting structure and construction method thereof |
| CN103835311A (en) * | 2014-02-25 | 2014-06-04 | 中交第一航务工程勘察设计院有限公司 | Post-tensioned prestressing underground diaphragm wall and construction method |
| CN207633325U (en) * | 2017-11-02 | 2018-07-20 | 安徽建筑大学 | Post-tensioned prestressing underground continuous wall structure with pull rod |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374409A (en) * | 2018-05-07 | 2018-08-07 | 河南城建学院 | A kind of prefabricated prestressed underground continuous wall |
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Application publication date: 20180130 |