CN109707072B - Prestressed rammed earth building wall and construction method thereof - Google Patents
Prestressed rammed earth building wall and construction method thereof Download PDFInfo
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Abstract
A prestressed rammed earth building wall and a construction method thereof belong to the technical field of building engineering and comprise more than one set of prestressed components, a ground beam, rammed earth and a ring beam, wherein the ground beam is positioned at the bottom of the wall, the rammed earth is positioned at the upper part of the ground beam, the ring beam is positioned at the upper part of the rammed earth, and the more than one set of prestressed components are all arranged inside the ground beam, the rammed earth and the ring beam; the prestress assembly comprises an outer sleeve, a spring, a lower end plate, an upper end plate, an inner sleeve and prestress steel bars. The invention adopts the spring made of the large-diameter round steel as a part of the prestressed reinforcement, solves the problem of prestress loss caused by overlarge deformation due to too low elastic modulus of the rammed earth material, establishes lasting vertical prestress in the wall body of the rammed earth building, and has no great prestress loss even if large deformation is generated under the condition of low elastic modulus, thereby effectively ensuring the anti-seismic performance and the durability of the rammed earth wall body and providing effective technical quality guarantee for the application of the rammed earth building.
Description
Technical Field
The invention belongs to the technical field of building engineering, and relates to construction of a raw soil building wall, in particular to a prestressed rammed soil building wall and a construction method thereof.
Background
Currently, there is still a population in the world that exceeds 1/3 residing in houses constructed from raw soil. Rammed earth is generally adopted in ancient buildings as a common application mode of a raw earth building, for example, a rammed earth mode is widely applied to the construction of a Qin great wall. The steel, cement, sintered tiles and the like which are commonly adopted in modern buildings seriously damage the ecological environment in the production process, and cement products, sintered tiles and the like are slowly degraded in the natural environment and seriously pollute the environment. However, in both ancient times when the production mode is behind and the current times, rammed earth buildings have obvious ecological advantages: the materials are used locally, deep processing is not needed, so that the energy consumption of production and transportation is saved, and the environmental pollution is reduced; the soil wall has good heat insulation performance and can adjust the air humidity; the raw soil can be recycled or directly returned to the land, thereby reducing the influence on the ecological environment to the maximum extent.
The rammed earth building has the defects that the rammed earth building is difficult to overcome in both ancient times and modern times, and one important item is that the rammed earth wall is low in elastic modulus, is only 1/50-1/100 of concrete, and is large in later-stage deformation; and the anti-seismic performance of the cable is poor due to the low shear strength of the cable.
The utility model discloses a patent CN201943217U, a built-in rope net rammed earth wall body belongs to civil engineering earth building component technical field, concretely relates to built-in rope net rammed earth wall body. The wall body comprises a rammed earth wall and is characterized in that at least one rope net is arranged inside the rammed earth wall body, the area of the rope net is larger than that of the earth wall body, and the side of the rope net is connected with other components to enhance the integrity of the structure. The structure wall is simple in construction and low in manufacturing cost, and the anti-seismic performance of the rope net on the rammed earth wall is improved remarkably. Obviously, the method is a passive mode for improving the earthquake resistance of the rammed earth building, and the rope net is easy to bend and fold during the ramming process, so that the effect of the rope net is obviously reduced.
The invention discloses a refuted invention patent application file CN201510380826.X, a prestressed rammed earth wall and a construction process thereof, and relates to a prestressed rammed earth wall and a construction process thereof. The invention relates to a rammed earth wall, which is characterized in that a plurality of groups of prestressed steel bars are arranged in the rammed earth wall body along the height direction of the rammed earth wall, the prestressed steel bars are arranged along the length direction of the rammed earth wall, and are fixed with two side surfaces of the rammed earth wall through steel plates to provide inward extrusion force for the rammed earth wall, so that the rammed earth wall is in a multidirectional compression state, the compression resistance and shear resistance bearing capacity of the rammed earth wall is effectively improved, the formation of vertical through seams can be effectively avoided, the height-thickness ratio of the wall body is effectively reduced, and the building height of the wall body is improved on the premise of not increasing the thickness of the wall body. The invention patent application has at least two problems: firstly, the prestress in the horizontal direction is established for the rammed earth wall, but not for the sleeve, which is not in accordance with the original intention; secondly, since the elastic modulus of the rammed earth is very low, even if a horizontal prestress is built in the rammed earth wall, the horizontal prestress is lost quickly due to the compression deformation of the rammed earth, so that the effect of the rammed earth is lost.
According to the formula and the principle of the calculation of the shear resistance of the wall body, if the shear resistance of the wall body is to be improved, firstly, the shear strength index of the material is improved, secondly, the vertical compressive stress of the wall body is moderately increased, and under the condition that the shear strength index of the rammed earth wall body is fixed, the shear strength of the rammed earth wall body is improved only by increasing the vertical compressive stress of the wall body, so that the seismic performance of the rammed earth wall body is improved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method comprises the steps of establishing lasting vertical pre-stress in the wall body of the rammed earth building, and taking a spring made of large-diameter round steel as a part of prestressed reinforcement in order to solve the problem of prestress loss caused by overlarge deformation due to too low elastic modulus of rammed earth materials, so that even if the rammed earth building wall body generates larger deformation under the condition of low elastic modulus, the prestress loss is not too much, and the anti-seismic performance of the rammed earth wall body is effectively ensured.
The utility model provides a prestressing force rammed earth building wall body which characterized by: the wall body is characterized by comprising more than one set of prestressed components, a ground beam, rammed earth and a ring beam, wherein the ground beam is positioned at the bottom of the wall body, the rammed earth is positioned at the upper part of the ground beam, the ring beam is positioned at the upper part of the rammed earth, and the more than one set of prestressed components are all arranged inside the ground beam, the rammed earth and the ring beam;
each set of prestressed components comprises an outer sleeve, a spring, a lower end plate, an upper end plate, an inner sleeve and prestressed steel bars, wherein the outer sleeve is a steel pipe; the inner sleeve is arranged in the outer sleeve and extends into the outer sleeve by 50-500 mm, the outer diameter of the inner sleeve is smaller than the inner diameter of the outer sleeve by 0.5-5 mm, a steel clapboard is arranged at the position of the upper part of the inner sleeve, which is 50-100 mm away from the top end of the tube, the outer contour size of the steel clapboard is 50-100 mm larger than the outer diameter of the inner sleeve, and a hole with the diameter of 12-40 mm is arranged in the center of the steel clapboard; the lower end plate is a steel plate and is welded at the bottom of the outer sleeve, and the outer contour size of the lower end plate is 50-100 mm larger than the outer diameter of the outer sleeve; the spring is arranged in the inner sleeve, the bottom of the spring is fixedly arranged on the lower end plate, and the outer diameter of the spring is 0.5-5 mm smaller than the inner diameter of the inner sleeve; the upper end plate is a steel plate and is arranged at the top of the spring, and the outer contour dimension of the upper end plate is the same as the outer diameter of the spring; the prestressed reinforcement is arranged on the upper portion of the upper end plate, and the top of the prestressed reinforcement penetrates through the hole in the steel partition plate.
A construction method of a prestressed rammed earth building wall body is characterized in that: the construction of the prestressed rammed earth building wall comprises the following steps which are sequentially carried out,
step one, preparing a prestressed component
Preparing more than one set of prestressed components, wherein the outer sleeve is prepared by adopting a steel pipe; the inner sleeve is made of a steel pipe, the outer diameter of the inner sleeve is smaller than the inner diameter of the outer sleeve by 0.5-5 mm, a steel clapboard which is welded and connected with the inner sleeve into a whole is arranged at the position 50-100 mm away from the top end of the inner sleeve, the outer contour size of the steel clapboard is larger than the outer diameter of the inner sleeve by 50-100 mm, and a hole with the diameter of 12-40 mm is arranged in the center of the steel clapboard; the lower end plate is made of a steel plate, and the external contour dimension of the lower end plate is 50 mm-100 mm larger than the external diameter of the outer sleeve; the upper end plate is made of a steel plate, and the outer diameter of the upper end plate is 0.5 mm-5 mm smaller than the inner diameter of the inner sleeve; the spring is made of round steel with the diameter of 12-25 mm, the outer diameter of the round steel is 0.5-5 mm smaller than the inner diameter of the inner sleeve, the bottom of the spring is connected with the lower end plate in a welding mode, and the top of the spring is connected with the upper end plate in a welding mode; the prestressed steel bars adopt steel bars with yield strength of more than 300MPa or finish-rolled deformed steel bars;
assembling a prestress assembly, inserting prestress steel bars into a hole in the center of a steel partition plate at the upper part of an inner sleeve, exposing the prestress steel bars from the bottom, sleeving an outer sleeve on the outer side of the inner sleeve from the bottom, welding or bolt-connecting an upper end plate and a spring which are welded and connected into a whole, a lower end plate and an upper end plate integrated piece with the prestress steel bars, inserting the upper end plate and a part of the spring into the inner sleeve, moving the outer sleeve, and welding and connecting the bottom of the outer sleeve and the lower end plate, thus completing the preparation of the prestress assembly;
step two, preparing the rammed earth building wall body containing the prestressed component
After the construction of the building foundation is finished, supporting a ground beam template and binding ground beam reinforcing steel bars, arranging more than one set of prestressed components according to design requirements, placing the bottoms of the prestressed components into the ground beam, enabling the top elevation of the outer sleeves to be flush with the top elevation of the ground beam, pouring ground beam concrete and maintaining until the strength reaches more than C20;
preparing a rammed earth wall body by manually or mechanically ramming after plain soil or plain soil is mixed with aggregates, leveling the top surface of the wall body after the top of the rammed earth wall body reaches a designed elevation, erecting a ring beam template and binding ring beam reinforcing steel bars, wherein the top elevation of the ring beam is flush with that of an inner sleeve, and then pouring ring beam concrete and maintaining until the strength reaches above C20;
step three, applying prestress to the rammed earth building wall
A jack is seated on the top surface of the ring beam to apply pretension stress to the prestressed steel bars, the spring in a compressed state is pulled to open a gap, the prestressed steel bars are locked by an anchorage device, the jack is removed, and redundant prestressed steel bar sections are removed;
after all the prestressed reinforcements are tensioned and locked, sustainable vertical pre-compressive stress is applied to the rammed earth building wall, and the construction of the prestressed rammed earth building wall is completed.
Through the design scheme, the invention can bring the following beneficial effects: a prestressed rammed earth building wall and a construction method thereof adopt a spring made of large-diameter round steel as a part of prestressed reinforcement, solve the problem of prestress loss caused by overlarge deformation due to too low elastic modulus of rammed earth materials, and establish lasting vertical prestress in the wall of the rammed earth building.
Drawings
The invention is further described with reference to the following figures and detailed description:
fig. 1 is a schematic cross-sectional view of an inner casing according to the present invention.
Fig. 2 is a schematic elevation view of the assembly of the spring, lower end plate, upper end plate and prestressed reinforcement of the present invention.
FIG. 3 is a cross-sectional view of the outer sleeve of the present invention.
Fig. 4 is a cross-sectional view of the pre-stressing assembly of the present invention.
Fig. 5 is a schematic cross-sectional view of the ground beam after the ground beam is manufactured.
FIG. 6 is a schematic cross-sectional view of a rammed earth wall of the present invention after its fabrication.
Fig. 7 is a schematic cross-sectional view of the ring beam of the present invention after the ring beam is manufactured.
FIG. 8 is a schematic cross-sectional view of a prestressed rammed earth building wall of the present invention after completion of construction.
In the figure, 1-foundation, 2-outer sleeve, 3-spring, 301-lower end plate, 302-upper end plate, 4-ground beam, 5-inner sleeve, 6-prestressed reinforcement, 7-rammed earth, 8-ring beam and 9-prestressed anchorage device.
Detailed Description
A prestressed rammed earth building wall body is shown in figure 8 and comprises more than one set of prestressed components, a ground beam 4, rammed earth 7 and a ring beam 8;
each set of pre-stressing assembly, as shown in fig. 4, includes an outer sleeve 2, a spring 3, a lower end plate 301, an upper end plate 302, an inner sleeve 5 and a pre-stressing reinforcement 6;
the outer sleeve 2 is prepared by a steel pipe as shown in fig. 3 to 8, the inner diameter of the outer sleeve is 0.5mm to 5mm larger than the outer diameter of the inner sleeve 5, and the bottom of the outer sleeve is connected with the lower end plate 301;
the inner sleeve 5 is prepared by a steel pipe and extends into the outer sleeve by 50-500 mm as shown in figure 1, the outer diameter of the inner sleeve is 0.5-5 mm smaller than the inner diameter of the outer sleeve 2, the inner diameter of the inner sleeve is 0.5-5 mm larger than the outer diameter of the upper end plate 302, a steel clapboard which is in an integrated structure with the inner sleeve 5 is arranged at the position 50-100 mm away from the top end of the inner sleeve, the outer contour size of the steel clapboard is 50-100 mm larger than the outer diameter of the inner sleeve 5, and a hole with the diameter of 12-40 mm is arranged in the center of the steel clapboard;
the lower end plate 301 is made of a steel plate as shown in fig. 2, and the outer contour dimension of the lower end plate is 50mm to 100mm larger than the outer diameter of the outer sleeve 2;
the upper end plate 302 is made of a steel plate as shown in fig. 2, the outer diameter of the upper end plate is 0.5 mm-5 mm smaller than the inner diameter of the inner sleeve 5, and the top of the upper end plate is connected with the prestressed reinforcement 6;
the spring 3 is made of round steel with the diameter of 12 mm-25 mm as shown in figure 2, the outer diameter of the round steel is 0.5 mm-5 mm smaller than the inner diameter of the inner sleeve 5, the bottom of the round steel is connected with the lower end plate 301, and the top of the round steel is connected with the upper end plate 302;
the prestressed reinforcement 6 is a reinforcement with a yield strength of more than 300MPa or finish rolled deformed steel bar as shown in fig. 2 and 8, and a prestressed anchor 9 is arranged at the top of the prestressed reinforcement 6;
the ground beam 4 is made of reinforced concrete and arranged at the bottom of the wall body as shown in figures 5 to 8; the rammed soil 7 is prepared by manually or mechanically ramming after being mixed with aggregate by using plain soil or plain soil as shown in figures 6 to 8; the ring beam 8, as shown in fig. 7 and 8, is made of reinforced concrete and is arranged on the top of the wall.
A construction method of a prestressed rammed earth building wall body, as shown in figures 1-8, comprises the following steps which are carried out in sequence,
step one, preparing a prestressed component
Preparing more than one set of pre-stressing assemblies, as shown in fig. 4, each set of pre-stressing assembly comprises an outer sleeve 2, a lower end plate 301, an upper end plate 302, a spring 3, an inner sleeve 5 and pre-stressing steel bars 6; the outer sleeve 2 is made of a steel pipe, and the inner diameter of the outer sleeve is 0.5 mm-5 mm larger than the outer diameter of the inner sleeve 5; the lower end plate 301 is made of a steel plate, and the external contour size of the lower end plate is 50 mm-100 mm larger than the external diameter of the outer sleeve 2; the upper end plate 302 is made of steel plate, and the outer diameter of the upper end plate is 0.5 mm-5 mm smaller than the inner diameter of the inner sleeve 5; the spring 3 is made of round steel with the diameter of 12 mm-25 mm, the outer diameter of the round steel is smaller than the inner diameter of the inner sleeve 5 by 0.5 mm-5 mm, the bottom of the spring 3 is connected with the lower end plate 301 in a welding mode, and the top of the spring is connected with the upper end plate 302 in a welding mode; the inner sleeve 5 is made of a steel pipe, the outer diameter of the inner sleeve is 0.5-5 mm smaller than the inner diameter of the outer sleeve 2, the inner diameter of the inner sleeve is 0.5-5 mm larger than the outer diameter of the upper end plate 302, a steel clapboard which is welded and connected with the inner sleeve 5 into a whole is arranged at the position 50-100 mm away from the top end of the top of the inner sleeve, the outer contour size of the steel clapboard is 50-100 mm larger than the outer diameter of the inner sleeve 5, and a hole with the diameter of 12-40 mm is arranged in the center of the steel clapboard; the prestressed reinforcement 6 adopts a reinforcement with the yield strength of more than 300MPa or finish-rolled deformed steel bar;
assembling the prestressed assembly, as shown in fig. 4, inserting the prestressed reinforcement 6 into a hole in the center of the steel partition plate at the upper end of the inner sleeve 5 and exposing the prestressed reinforcement from the bottom, then sleeving the outer sleeve 2 on the outer side of the inner sleeve 5 from the bottom, welding or bolting the upper end plate 302 of the spring 3, the lower end plate 301 and the upper end plate 302 which are welded and connected into a whole with the prestressed reinforcement 6, then inserting a part of the upper end plate 302 and the spring 3 into the inner sleeve 5, moving the outer sleeve 2, and welding and connecting the bottom of the outer sleeve 2 and the lower end plate 301, thus completing the preparation of the prestressed assembly;
step two, preparing the rammed earth building wall body containing the prestressed component
As shown in fig. 5, after the construction of the building foundation 1 is completed, supporting a template of the ground beam 4 and binding a steel bar of the ground beam 4, arranging more than one prestressed assembly according to the design requirement, placing the bottom of the prestressed assembly into the ground beam 4, enabling the top elevation of the outer sleeve 2 to be flush with the top elevation of the ground beam 4, then pouring concrete of the ground beam 4 and curing until the strength reaches above C20;
as shown in fig. 6 and 7, a rammed earth 7 wall body is prepared by adopting plain soil or plain soil mixed with aggregates and then being manually or mechanically rammed, after the top of the rammed earth 7 wall body reaches a designed elevation, the top surface of the wall body is leveled, a ring beam 8 template is supported and a ring beam 8 reinforcing steel bar is bound, the top elevation of the ring beam 8 is leveled with the top elevation of the inner sleeve 5, and then the ring beam 8 concrete is poured and cured until the strength reaches above C20;
step three, applying prestress to the rammed earth building wall
As shown in fig. 8, a jack is seated on the top surface of the ring beam 8 to apply pretension to the prestressed reinforcement 6, the tight spring 3 is pulled open, the prestressed reinforcement 6 is locked by an anchorage device 9, the jack is removed and the redundant prestressed reinforcement segment is removed;
after all the prestressed reinforcements 6 are tensioned and locked, the rammed earth building wall body applies sustainable vertical pre-compressive stress, and the construction of the prestressed rammed earth building wall body is completed.
Claims (1)
1. The construction method of the prestressed rammed earth building wall comprises more than one set of prestressed components, a ground beam (4), rammed earth (7) and a ring beam (8), wherein the ground beam (4) is positioned at the bottom of the wall, the rammed earth (7) is positioned at the upper part of the ground beam (4), the ring beam (8) is positioned at the upper part of the rammed earth (7), and the prestressed components are arranged in the ground beam (4), the rammed earth (7) and the ring beam (8);
each set of the prestress assembly comprises an outer sleeve (2), a spring (3), a lower end plate (301), an upper end plate (302), an inner sleeve (5) and prestress steel bars (6), wherein the outer sleeve (2) is a steel pipe; the inner sleeve (5) is arranged in the outer sleeve (2) and extends into the outer sleeve (2) by 50-500 mm, the outer diameter of the inner sleeve (5) is smaller than the inner diameter of the outer sleeve (2) by 0.5-5 mm, a steel clapboard is arranged at the position of the upper part of the inner sleeve (5) 50-100 mm away from the top end of the pipe, the outer contour size of the steel clapboard is larger than the outer diameter of the inner sleeve (5) by 50-100 mm, and a hole with the diameter of 12-40 mm is arranged at the center of the steel clapboard; the lower end plate (301) is a steel plate and is welded at the bottom of the outer sleeve (2), and the outer contour size of the lower end plate (301) is 50-100 mm larger than the outer diameter of the outer sleeve (2); the spring (3) is arranged in the inner sleeve (5), the bottom of the spring is fixedly arranged on the lower end plate (301), and the outer diameter of the spring (3) is 0.5-5 mm smaller than the inner diameter of the inner sleeve (5); the upper end plate (302) is a steel plate and is arranged at the top of the spring (3), and the outer contour size of the upper end plate is the same as the outer diameter of the spring (3); the prestressed reinforcement (6) is arranged at the upper part of the upper end plate (302), and the top of the prestressed reinforcement penetrates through a hole in the steel clapboard;
the method is characterized in that: comprises the following steps which are sequentially carried out,
step one, preparing a prestressed component
Preparing more than one set of prestressed components, wherein the outer sleeve (2) is prepared by adopting a steel pipe; the inner sleeve (5) is made of a steel pipe, the outer diameter of the inner sleeve is 0.5-5 mm smaller than the inner diameter of the outer sleeve (2), a steel clapboard which is welded and connected with the inner sleeve (5) into a whole is arranged at the position 50-100 mm away from the top end of the upper part, the outer contour size of the steel clapboard is 50-100 mm larger than the outer diameter of the inner sleeve (5), and a hole with the diameter of 12-40 mm is arranged in the center of the steel clapboard; the lower end plate (301) is made of a steel plate, and the external contour size of the lower end plate is 50 mm-100 mm larger than the external diameter of the outer sleeve (2); the upper end plate (302) is made of a steel plate, and the outer diameter of the upper end plate is 0.5 mm-5 mm smaller than the inner diameter of the inner sleeve (5); the spring (3) is made of round steel with the diameter of 12 mm-25 mm, the outer diameter of the round steel is smaller than the inner diameter of the inner sleeve (5) by 0.5 mm-5 mm, the bottom of the spring (3) is connected with the lower end plate (301) in a welding mode, and the top of the spring is connected with the upper end plate (302) in a welding mode; the prestressed reinforcement (6) adopts a reinforcement with the yield strength of more than 300MPa or finish rolling deformed steel bar;
assembling a prestress assembly, inserting a prestress steel bar (6) into a hole in the center of a steel partition plate at the upper part of an inner sleeve (5) and exposing the prestress steel bar from the bottom, sleeving an outer sleeve (2) on the outer side of the inner sleeve (5) from the bottom, welding or bolt-connecting a spring (3), a lower end plate (301) and an upper end plate (302) of an integral piece of an upper end plate (302) which are welded and connected into a whole with the prestress steel bar (6), inserting the upper end plate (302) and one part of the spring (3) into the inner sleeve (5), moving the outer sleeve (2), welding and connecting the bottom of the outer sleeve (2) with the lower end plate (301), and completing the preparation of the prestress assembly;
step two, preparing the rammed earth building wall body containing the prestressed component
After the construction of the building foundation (1) is completed, supporting a template of the ground beam (4) and binding steel bars of the ground beam (4), arranging more than one set of prestressed components according to design requirements, placing the bottoms of the prestressed components into the ground beam (4), enabling the top elevation of the outer sleeve (2) to be flush with the top elevation of the ground beam (4), pouring concrete of the ground beam (4) and maintaining until the strength reaches more than C20;
preparing a rammed earth (7) wall body by manually or mechanically tamping after plain soil or plain soil is mixed with aggregates, leveling the top surface of the wall body after the top of the rammed earth (7) wall body reaches a designed elevation, supporting a ring beam (8) template and binding a ring beam (8) reinforcing steel bar, wherein the elevation of the top of the ring beam (8) is flush with the height of the top of the inner sleeve (5), and then pouring the ring beam (8) concrete and maintaining until the strength reaches above C20;
step three, applying prestress to the rammed earth building wall
A jack is seated on the top surface of the ring beam (8) to apply pre-tensioning stress to the prestressed reinforcement (6), the spring (3) in a compressed state is pulled to open a gap, an anchorage device (9) is adopted to lock the prestressed reinforcement (6), the jack is removed, and the redundant prestressed reinforcement section is removed;
after all the prestressed reinforcements (6) are tensioned and locked, the rammed earth building wall body applies sustainable vertical pre-compressive stress, and the construction of the prestressed rammed earth building wall body is completed.
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| CN110593453A (en) * | 2019-08-22 | 2019-12-20 | 北京建筑大学 | Rammed earth wall construction method and rammed earth wall |
| CN112482881B (en) * | 2020-12-03 | 2022-01-28 | 中国建筑股份有限公司 | Enclosure system of landscape building and construction method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102704704A (en) * | 2012-06-19 | 2012-10-03 | 北京市建筑工程研究院有限责任公司 | Vertical un-bonded prestressed anti-seismic strengthening structure of masonry building |
| KR101625428B1 (en) * | 2016-01-26 | 2016-05-30 | (주)이지이앤티 | Permanent anchor having elastic supporter for differential load dispersion |
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| DE19755080B4 (en) * | 1997-12-11 | 2004-12-02 | Stabilus Gmbh | Gas spring with stop function and temperature compensation |
| CN201722825U (en) * | 2010-08-04 | 2011-01-26 | 中建三局装饰有限公司 | Large-deformation pulling cable connecting mechanism |
| CN207211435U (en) * | 2017-07-21 | 2018-04-10 | 天津城建大学 | A kind of vertical prestressing loam wall |
| CN107882267A (en) * | 2017-12-19 | 2018-04-06 | 东北林业大学 | A kind of automatic prestressing force regulation device and application method for eliminating draw |
| CN209620328U (en) * | 2019-01-31 | 2019-11-12 | 吉林建筑大学 | A kind of prestressing force cob wall |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102704704A (en) * | 2012-06-19 | 2012-10-03 | 北京市建筑工程研究院有限责任公司 | Vertical un-bonded prestressed anti-seismic strengthening structure of masonry building |
| KR101625428B1 (en) * | 2016-01-26 | 2016-05-30 | (주)이지이앤티 | Permanent anchor having elastic supporter for differential load dispersion |
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