CN208586602U - The cast-in-place hollow continuous underground wall structure of post-tensioned prestressed concrete - Google Patents
The cast-in-place hollow continuous underground wall structure of post-tensioned prestressed concrete Download PDFInfo
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- CN208586602U CN208586602U CN201820993368.6U CN201820993368U CN208586602U CN 208586602 U CN208586602 U CN 208586602U CN 201820993368 U CN201820993368 U CN 201820993368U CN 208586602 U CN208586602 U CN 208586602U
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Abstract
The hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete provided by the utility model, is related to construction engineering technical field.The structure includes cast-in-place manufactured concrete wall, post-tensioned prestressing system is vertically arranged in the concrete walls body, post-tensioned prestressing system includes presstressed reinforcing steel, stretching end and fixing end, stretching end is located at the top of concrete wall, fixing end is located at concrete wall bottom, concrete wall is hollow section structure, and inside has several wall cavities.Its intensity that can not only improve diaphram wall, rigidity and cracking resistance reduce amount of reinforcement, and expand since steel reinforcement cage lightens with bar spacing, be conducive to lifting construction operation and improve concrete pouring quality；And hollow section structure type significantly reduces concrete amount, greatly reduces the cost of underground engineering.In addition, the lateral frictional resistance of wall will be increased after the slurry curing for the admixture clay hardening agent being perfused in wall cavity, the vertical bearing capacity of diaphram wall is significantly improved.
Description
Technical field
The utility model belongs to construction engineering technical field, and in particular to cast-in-place post-tensioned prestressed concrete hollowly connects down
Continuous wall construction.
Background technique
Diaphram wall is as one of deep foundation pit support retaining wall common type, in undergrounds such as skyscraper, municipal works
It is widely applied in foundation pit enclosure structure.But as excavation of foundation pit is deeper and deeper, Water And Earth Pressures that building enclosure is subject to
It is increasing, in order to reach enough strength and stiffness, the thickness of diaphram wall need to be increased and reduce the spacing of support, this is not
The expense for increasing only building enclosure, also improves difficulty of construction.Prestressed underground continuous wall is to be applied to prestressing technique
In the design and construction of continuous underground wall structure, by prestress system pre-buried in steel reinforcement cage, then concrete placed under water
Wall successively tensioned prestressing bar and locks after concrete strength reaches design value, make continuous underground wall structure intensity and
Rigidity meets design requirement.Prestressing technique be applied to continuous underground wall structure, can not only improve diaphram wall intensity,
Rigidity and cracking resistance reduce amount of reinforcement, and reduce since steel reinforcement cage lightens with amount of reinforcement, are also beneficial to lifting construction
Operation and the pouring quality for improving underwater concrete.
But current prestressed underground continuous wall patent is mostly prefabricated, and is solid section.Certainly due to armored concrete
It is up to 2.7t/m again3, the bottleneck of design of lifting points and Lifting Capacity as prefabricated prestressed underground continuous wall development, especially for
Deep-foundation pit engineering not yet sees that coercion underground continuous wall is applied to the example of Practical Project at present.Although cast-in-place prestressed coagulation
Native diaphram wall length can be unrestricted, but deep basal pit prestressed underground continuous wall is embedding very deep, and walls concrete dosage is huge
Greatly, and wall side friction power is smaller, and vertical bearing capacity is not high.
Utility model content
The purpose of this utility model is to provide a kind of cast-in-place hollow continuous underground wall structures of post-tensioned prestressed concrete, no
It only can be improved the intensity, rigidity and cracking resistance of continuous underground wall structure, reduce amount of reinforcement, and since steel reinforcement cage lightens
Expand with bar spacing, be conducive to lifting construction operation and improve concrete pouring quality；And hollow section structure type will be shown
The concrete amount for reducing continuous underground wall structure is write, the cost of underground engineering is greatly reduced.In addition, being perfused in wall cavity
Admixture clay hardening agent slurry curing after, the lateral frictional resistance of wall will be increased, significantly improve diaphram wall vertically hold
Carry power.
In order to solve the above technical problems, the utility model provides the following technical solutions:
A kind of hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete, including cast-in-place manufactured concrete wall,
Post-tensioned prestressing system is vertically arranged in the concrete walls body, the post-tensioned prestressing system includes presstressed reinforcing steel and difference
It is set to the stretching end and fixing end at the presstressed reinforcing steel both ends, the stretching end is located at the top of concrete wall, the fixation
End is located at concrete wall bottom, and the concrete wall is hollow section structure, and inside has several wall cavities.
Preferably, in the above-mentioned hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete, the stretching end packet
Include stretching end anchorage, stretching end anchor plate and stretching end spiral bar, the upper end of the presstressed reinforcing steel is upwards successively described in drawing-in
It is anchored in after stretching end spiral bar, stretching end anchor plate on the stretching end anchorage, is equipped in the stretching end anchorage for pressing from both sides
Hold the intermediate plate group of presstressed reinforcing steel.
Preferably, in the above-mentioned hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete, the fixing end packet
Include fixing end anchorage, fixing end anchor plate and fixing end spiral bar, the lower end of the presstressed reinforcing steel is downwards successively described in drawing-in
It is anchored in after fixing end spiral bar, fixing end anchor plate on the fixing end anchorage, the fixing end anchorage uses squash type anchor
Tool.
Preferably, in the above-mentioned hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete, the presstressed reinforcing steel
For unbonded prestressing tendon or delayed bonding prestressed tendon.
Preferably, in the above-mentioned hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete, the wall cavity
It is formed by pore-forming pipe pre-buried in concrete wall, along the longitudinal equidistant cloth of concrete wall when the pore-forming pipe is pre-buried
It sets, and the center of the pore-forming pipe matches with the center line of concrete wall.
Preferably, in the above-mentioned hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete, the wall cavity
Interior perfusion adds the mud of clay hardening agent.
By techniques disclosed above scheme it is found that compared with prior art, the beneficial effects of the utility model are as follows:
The hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete provided by the utility model, by concrete walls
It is vertically arranged post-tensioned prestressing system in vivo, and prestressing force is applied to concrete wall, diaphram wall can not only be improved
Intensity, rigidity and cracking resistance reduce amount of reinforcement, and expand since steel reinforcement cage lightens with bar spacing, are conducive to lift
Construction operation and raising concrete pouring quality.In addition, the utility model is used for shape by pre-buried in the concrete walls body
At the pore-forming pipe of wall cavity, hollow section structure is formed, the concrete amount of diaphram wall will be substantially reduced, greatly reduced
The cost of underground engineering.The utility model economic benefit and social benefit are huge, have a extensive future.
In addition, the hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete provided by the utility model, by wall
Body sky intra-bladder instillation adds the mud of clay hardening agent, will increase the lateral frictional resistance of concrete wall after slurry curing, and show
Write the vertical bearing capacity for improving diaphram wall.
Detailed description of the invention
Fig. 1 is the facade of the hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete of an embodiment of the present invention
Schematic diagram；
Fig. 2 is the 1-1 cross-sectional view of Fig. 1；
Fig. 3 is the 2-2 cross-sectional view of Fig. 2；
Fig. 4 is the 3-3 cross-sectional view of Fig. 2；
Fig. 5 is the structural schematic diagram of stretching end in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of fixing end in an embodiment of the present invention.
In figure: 1- wall, 2- presstressed reinforcing steel, 3- stretching end anchorage, 4- stretching end anchor plate, 5- stretching end spiral bar, 6-
Fixing end anchorage, 7- fixing end anchor plate, 8- fixing end spiral bar, 9- wall cavity, 10- vertical reinforcement, 11- horizontal reinforcement,
12- mud.
Specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.Below will by it is cited it
The technology contents and feature of the utility model are described in detail in embodiment combination attached drawing.Need in addition it illustrate, attached drawing is all made of non-
Often simplified form and use non-accurate ratio, only to it is convenient, lucidly aid in illustrating the utility model embodiment
Purpose.For sake of convenience, "upper" described below, "lower" are consistent with the upper and lower direction of attached drawing, but this can't be this reality
With the limitation of new technique scheme.
Fig. 1 to Fig. 6 is please referred to, present embodiment discloses a kind of cast-in-place hollow diaphram wall knots of post-tensioned prestressed concrete
Structure, including cast-in-place manufactured concrete wall 1 are vertically arranged post-tensioned prestressing system, the post-tensioning in the concrete wall 1
Prestress system includes presstressed reinforcing steel 2 and the stretching end (i.e. tensioning end structure) for being respectively arranged at 2 both ends of presstressed reinforcing steel
And fixing end (i.e. fixed end structure), the stretching end is located at 1 top of concrete wall, and the fixing end is located at concrete wall
1 bottom, the concrete wall 1 are hollow section structure, and inside has several wall cavities 9, i.e., in the described concrete wall 1
Portion has several wall cavities 9, forms hollow section structure.The wall cavity 9 passes through pore-forming pre-buried in concrete wall 1
Pipe, and be pulled out being formed after 1 concreting completion of wall and initial set.
The hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete provided in this embodiment, by concrete wall
It is vertically arranged post-tensioned prestressing system in 1, and prestressing force is applied to the presstressed reinforcing steel of concrete wall 12, can not only improve ground
Intensity, rigidity and the cracking resistance of lower diaphragm wall reduce amount of reinforcement, and expand since steel reinforcement cage lightens with bar spacing,
Be conducive to lifting construction operation and improve concrete pouring quality.In addition, the utility model pass through it is pre- in the concrete wall 1
The pore-forming pipe for being used to form wall cavity 9 is buried, hollow section structure is formed, the concrete for substantially reducing diaphram wall is used
Amount greatly reduces the cost of underground engineering.
Preferably, in the above-mentioned hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete, the stretching end packet
Include stretching end anchorage 3, stretching end anchor plate 4 and stretching end spiral bar 5, the upper end of the presstressed reinforcing steel 2 successively drawing-in upwards
It is anchored in after the stretching end spiral bar 5, stretching end anchor plate 4 on the stretching end anchorage 3, is set in the stretching end anchorage 3
There is the intermediate plate group (not shown) for clamping presstressed reinforcing steel 2.By the way that stretching end spiral bar 5 is arranged, after stretching end anchor can be improved
The compression strength of concrete prevents concrete after anchor from local failure occurs under stretching force effect.By the way that structure as above is arranged
The tensioning of presstressed reinforcing steel 2 may be implemented in stretching end.
Preferably, in the above-mentioned hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete, the fixing end packet
Include fixing end anchorage 6, fixing end anchor plate 7 and fixing end spiral bar 8, the lower end of the presstressed reinforcing steel 2 successively drawing-in downwards
It is anchored in after the fixing end spiral bar 8, fixing end anchor plate 7 on the fixing end anchorage 6, the fixing end anchorage is using crowded
Pressure type anchorage.Extruded anchoring tool is the sleeve by being sheathed on presstressed reinforcing steel end, is squeezed by dedicated extruded equipment, so that squeezing
Sleeve is held with a firm grip presstressed reinforcing steel after generating plastic deformation, and the pulling force of presstressed reinforcing steel is reached by squeezing sleeve by fixing end anchor plate 7
Concrete wall 1.In the present embodiment, by the way that fixing end spiral bar 8 is arranged, the pressure resistance of concrete after fixing end anchor can be improved
Degree prevents concrete after anchor from local failure occurs under stretching force effect.
Preferably, in the above-mentioned hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete, the presstressed reinforcing steel 2
For unbonded prestressing tendon 2 or delayed bonding prestressed tendon 2.
In the present embodiment, wall section is also equipped with vertical reinforcement 10 and horizontal reinforcement 11, vertical reinforcement 10 and horizontal reinforcement
11 bear the external load of diaphram wall with presstressed reinforcing steel 2 jointly.
Preferably, in the above-mentioned hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete, the wall cavity 9
It is formed by pore-forming pipe pre-buried in concrete wall 1, along the longitudinal equidistant cloth of concrete wall 1 when the pore-forming pipe is pre-buried
It sets, and the center of the pore-forming pipe matches with the center line (i.e. the vertical centerline of concrete wall 1) of concrete wall 1,
So that 1 section of concrete wall is symmetrical, stress is avoided to concentrate.
Preferably, in the above-mentioned hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete, the wall cavity 9
Interior perfusion adds the mud 12 of clay hardening agent, and the volume of clay hardening agent is the 10%~20% of mud weight.Wall cavity 9
The mud 12 that interior perfusion adds clay hardening agent can increase by 1 side of concrete wall to frictional resistance after solidifying, and significantly improve ground
The vertical bearing capacity of lower diaphragm wall.
In conclusion the utility model is based on the characteristics of diaphram wall is mainly flexural member, concrete wall is proposed
It is vertically arranged presstressed reinforcing steel using hollow section structural shape and along wall, in this way on the basis of obtaining prestressing technique advantage,
The concrete amount of wall can also be greatly reduced.In addition, filling admixture clay in wall cavity after the completion of prestressing force to be applied
The mud of curing agent can also increase the lateral frictional resistance of wall after slurry curing and improve its vertical bearing capacity, economic benefit and society
It can Benefit.
Foregoing description is only the description to the utility model preferred embodiment, not to any limit of the scope of the utility model
Fixed, any change, the modification that the those of ordinary skill in the utility model field does according to the disclosure above content belong to right and want
Seek the protection scope of book.
Claims (6)
1. a kind of hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete, which is characterized in that including cast-in-place manufactured mixed
Cob wall body is coagulated, is vertically arranged post-tensioned prestressing system in the concrete walls body, the post-tensioned prestressing system includes prestressing force
Muscle and the stretching end and fixing end for being respectively arranged at the presstressed reinforcing steel both ends, the stretching end are located at concrete wall top
Portion, the fixing end are located at concrete wall bottom, and the concrete wall is hollow section structure, and inside has several walls
Cavity.
2. the cast-in-place hollow continuous underground wall structure of post-tensioned prestressed concrete as described in claim 1, which is characterized in that described
Stretching end includes stretching end anchorage, stretching end anchor plate and stretching end spiral bar, and the upper end of the presstressed reinforcing steel is upwards successively
It is anchored in after stretching end spiral bar, stretching end anchor plate described in drawing-in on the stretching end anchorage, is set in the stretching end anchorage
There is the intermediate plate group for clamping presstressed reinforcing steel.
3. the cast-in-place hollow continuous underground wall structure of post-tensioned prestressed concrete as described in claim 1, which is characterized in that described
Fixing end includes fixing end anchorage, fixing end anchor plate and fixing end spiral bar, and the lower end of the presstressed reinforcing steel is downwards successively
It is anchored in after fixing end spiral bar, fixing end anchor plate described in drawing-in on the fixing end anchorage, the fixing end anchorage uses
Extruded anchoring tool.
4. the cast-in-place hollow continuous underground wall structure of post-tensioned prestressed concrete as described in claim 1, which is characterized in that described
Presstressed reinforcing steel is unbonded prestressing tendon or delayed bonding prestressed tendon.
5. the cast-in-place hollow continuous underground wall structure of post-tensioned prestressed concrete as described in claim 1, which is characterized in that described
Wall cavity is formed by pore-forming pipe pre-buried in concrete wall, longitudinal etc. along concrete wall when the pore-forming pipe is pre-buried
Spacing arrangement, and the center of the pore-forming pipe matches with the center line of concrete wall.
6. the cast-in-place hollow continuous underground wall structure of post-tensioned prestressed concrete as described in claim 1, which is characterized in that described
Perfusion adds the mud of clay hardening agent in wall cavity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820993368.6U CN208586602U (en) | 2018-06-26 | 2018-06-26 | The cast-in-place hollow continuous underground wall structure of post-tensioned prestressed concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820993368.6U CN208586602U (en) | 2018-06-26 | 2018-06-26 | The cast-in-place hollow continuous underground wall structure of post-tensioned prestressed concrete |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951607A (en) * | 2018-06-26 | 2018-12-07 | 上海建工集团股份有限公司 | The hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete and its construction method |
| CN113279428A (en) * | 2021-06-09 | 2021-08-20 | 中铁四局集团第五工程有限公司 | Construction method of semi-suspended prestressed concrete wall roadway under cover-excavation top-down condition |
| CN113529790A (en) * | 2021-07-26 | 2021-10-22 | 中铁四局集团第五工程有限公司 | Underground driveway prestressed side wall and tensioning construction method thereof |
-
2018
- 2018-06-26 CN CN201820993368.6U patent/CN208586602U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951607A (en) * | 2018-06-26 | 2018-12-07 | 上海建工集团股份有限公司 | The hollow continuous underground wall structure of cast-in-place post-tensioned prestressed concrete and its construction method |
| CN113279428A (en) * | 2021-06-09 | 2021-08-20 | 中铁四局集团第五工程有限公司 | Construction method of semi-suspended prestressed concrete wall roadway under cover-excavation top-down condition |
| CN113529790A (en) * | 2021-07-26 | 2021-10-22 | 中铁四局集团第五工程有限公司 | Underground driveway prestressed side wall and tensioning construction method thereof |
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