阅读说明：本技术 一种用于裙房框架梁施工的有粘结预应力施工工艺 (Bonded prestress construction process for skirt house frame beam construction ) 是由 袁内蒙 邬博亮 郭毅 朱光强 李航 杨晓霞 冯杉 文舒 于 2021-07-27 设计创作，主要内容包括：本发明公开了用于裙房框架梁施工的有粘结预应力施工工艺,包括：A有粘结预应力筋固定端的第一锚垫板和对应的第一锚具组装,波纹管、钢丝绳运输至铺放部,每根钢丝绳对应设有第一锚垫板,每个第一锚垫板对应设有第一锚具,第一锚具用于将钢丝绳端部锚固于对应的第一锚垫板上,所有第一锚垫板沿球面设置,支裙房框架梁梁底模,绑扎梁普通钢筋；B铺放波纹管,穿入钢丝绳,固定波纹管,安装排气孔、有粘结预应力筋张拉端节点；C绑扎张拉端钢筋,支梁侧模及板底,铺设楼板钢筋；D浇筑混凝土,搭设张拉设备,混凝土达到张拉强度后张拉预应力筋,张拉无误后波纹管中灌浆；E预应力筋端部混凝土封锚。该施工工艺步骤简单,操作方便,效果良好。(The invention discloses a construction process with bonding prestress for skirt house frame beam construction, which comprises the following steps: a, assembling a first anchor backing plate with a fixed end of a bonding prestressed tendon and a corresponding first anchor, conveying corrugated pipes and steel wire ropes to a laying part, wherein each steel wire rope is correspondingly provided with a first anchor backing plate, each first anchor backing plate is correspondingly provided with a first anchor, the first anchors are used for anchoring the end parts of the steel wire ropes to the corresponding first anchor backing plates, all the first anchor backing plates are arranged along a spherical surface, and supporting a bottom die of a frame beam of a skirt house and binding common steel bars of the beam; b, laying a corrugated pipe, penetrating a steel wire rope, fixing the corrugated pipe, installing an exhaust hole and tensioning end nodes with bonding prestressed tendons; c, binding reinforcing steel bars at the tensioning end, supporting beam side molds and plate bottoms, and laying floor reinforcing steel bars; d, pouring concrete, erecting tensioning equipment, tensioning the prestressed tendons after the concrete reaches the tensioning strength, and grouting in the corrugated pipe after tensioning is correct; e, sealing the anchor by concrete at the end part of the prestressed tendon. The construction process has the advantages of simple steps, convenient operation and good effect.)

1. A bonded prestress construction process for skirt house frame beam construction is characterized by comprising the following steps:

A. the steel wire rope fixing device comprises a plurality of steel wire ropes (1) with bonding prestressed tendons, a first anchor backing plate (3) with a fixed end of the bonding prestressed tendons and a corresponding first anchor (4) which are assembled, a corrugated pipe (2) with the bonding prestressed tendons and the steel wire ropes (1) are transported to a laying part, each steel wire rope (1) is correspondingly provided with one first anchor backing plate (3), each first anchor backing plate (3) is correspondingly provided with one first anchor (4), each first anchor (4) is used for anchoring the end part of each steel wire rope (1) to the corresponding first anchor backing plate (3), all the first anchor backing plates (3) are arranged along a spherical surface, a bottom die of a beam of a skirt house frame beam is supported, and common steel bars of the beam are bound;

B. laying the corrugated pipe (2), penetrating the steel wire rope (1), fixing the corrugated pipe (2), installing an exhaust hole and tensioning end nodes with bonded prestressed tendons;

C. binding a tensioning end reinforcing steel bar, a supporting beam side mold and a slab bottom, and laying a floor slab reinforcing steel bar;

D. pouring concrete, erecting tensioning equipment, tensioning the prestressed tendons after the concrete reaches the tensioning strength, and grouting in the corrugated pipe (2) after tensioning is correct;

E. and (5) sealing the anchor by concrete at the end part of the prestressed tendon.

2. The bonded prestress construction process for skirt house frame beam construction according to claim 1, wherein the first anchor backing plate (3) comprises a backing plate body (31), a through hole (32) and a groove body (33), the through hole (32) is formed in the centroid of the backing plate body (31), the through hole (32) is used for the steel wire rope (1) to penetrate through the backing plate body (31), the groove body (33) is connected to one side of the backing plate body (31), the groove bottom of the groove body (33) is communicated with the through hole (32), the steel wire rope (1) can penetrate through the through hole (32) to enter the groove body (33), and the groove body (33) is used for setting the first anchor (4).

3. The construction process with adhesive prestress for the construction of the skirt house frame beam according to claim 2, wherein the pad body (31) and the groove body (33) are integrally formed members.

4. The construction process with bonding prestress for the skirt house frame beam construction according to claim 2, wherein a chamfer (34) is arranged between the pad body (31) and the groove body (33).

5. The construction process with cohesive prestress for the construction of skirt house frame beams according to claim 1, characterized in that the end of the corrugated tube (2) is a sealed end (21).

6. The construction process with adhesive prestress for the frame beam of the skirt house according to the claim 5, characterized in that the end of the corrugated pipe (2) is provided with filler to form the sealing end (21).

7. The bonded prestressed construction process for skirt house frame beam construction according to claim 1, characterized in that said first anchorage device (4) is a clip type anchorage device.

8. The bonded prestressed construction process for skirt house frame beam construction according to any one of claims 1-7, wherein the tension end nodes comprise a second anchor pad plate (5), a second anchor (6), a plurality of steel bar net sheets (7) and reserved beard bars (8), the second anchor pad plate (5) is connected with the corrugated pipe (2) through a horn tube, all the steel wire ropes (1) are anchored to the second anchor pad plate (5) through the second anchor (6), the second anchor pad plate (5) is arranged in a steel bar cage formed by the steel bar net sheets (7) and the reserved beard bars (8), and after the tension bars are tensioned, post-cast concrete (9) is poured into the tension end nodes.

9. The construction process with cohesive prestress for the construction of the skirt house frame beam according to claim 8, characterized in that the post-cast concrete (9) is micro-expanded fine-stone concrete.

10. The bonded prestressed construction process for skirt house frame beam construction according to claim 8, characterized in that said second anchorage device (6) is a group anchorage device.

Technical Field

The invention relates to the field of building construction, in particular to a construction process with bonding prestress for skirt house frame beam construction.

Background

Because the skirt house frame beam has large span and large load, in order to improve the bearing capacity and control deflection and cracks, the skirt house frame beam can be provided with bonding prestressed tendons as required; in the existing fixed end node structure with bonding prestressed tendons, a plurality of steel wire ropes are sleeved in a corrugated pipe, the end part of the corrugated pipe is connected with an anchor backing plate, and all the steel wire ropes are anchored on the anchor backing plate through a group anchor anchorage device; the existing fixed end node structure with the bonded prestressed tendons is anchored intensively, when the prestressed tendons are subsequently released, the prestressed tendons can cause large concentrated stress to the structure around the anchor backing plate, and the structure around the anchor backing plate is cracked and damaged seriously, so that the skirt house frame beam does not reach the standard, and therefore a new bonded prestressed construction process for skirt house frame beam construction is needed.

Disclosure of Invention

The invention aims to: aiming at the problems that the existing fixed end node structure with the bonded prestressed tendon in the prior art is anchored intensively, and the prestressed tendon can cause larger concentrated stress to the structure around the anchor backing plate when the prestressed tendon is subsequently released, and the structure around the anchor backing plate is cracked and damaged seriously, so that the skirt house frame beam cannot reach the standard, the bonded prestressed construction process for skirt house frame beam construction is provided.

In order to achieve the purpose, the invention adopts the technical scheme that:

a bonded prestress construction process for skirt house frame beam construction comprises the following steps:

A. the steel wire rope fixed length material comprises a plurality of steel wire rope fixed length materials with bonding prestressed tendons, a first anchor backing plate with a bonding prestressed tendon fixed end and a corresponding first anchor device are assembled, a corrugated pipe with the bonding prestressed tendons and the steel wire ropes are conveyed to a laying part, each steel wire rope is correspondingly provided with one first anchor backing plate, each first anchor backing plate is correspondingly provided with one first anchor device, each first anchor device is used for anchoring the end part of each steel wire rope to the corresponding first anchor backing plate, all the first anchor backing plates are arranged along a spherical surface, a supporting skirt house frame beam bottom die is arranged, and beam common steel bars are bound;

B. laying the corrugated pipe, penetrating the steel wire rope, fixing the corrugated pipe, installing an exhaust hole and tensioning end nodes with bonded prestressed tendons;

C. binding a tensioning end reinforcing steel bar, a supporting beam side mold and a slab bottom, and laying a floor slab reinforcing steel bar;

D. pouring concrete, erecting tensioning equipment, tensioning the prestressed tendons after the concrete reaches the tensioning strength, and grouting in the corrugated pipe after tensioning is correct;

E. and (5) sealing the anchor by concrete at the end part of the prestressed tendon.

By adopting the construction process with bonding prestress for the skirt house frame beam construction, all the steel wire ropes in the prestressed tendons are dispersedly anchored through the first anchor backing plate and the corresponding first anchorage device, so that the problem of stress concentration on the skirt house frame beam structure around the first anchor backing plate after tension releasing is avoided; all the first anchor backing plates are arranged along a spherical surface, namely the bearing surfaces of all the first anchor backing plates are propped by an imaginary sphere, so that the bearing is more uniform, and the stability of an anchoring structure is facilitated; the construction process with the bonding prestress for the skirt house frame beam construction is simple in steps, convenient to operate and good in effect.

Preferably, first anchor backing plate includes backing plate body, through-hole and cell body, the through-hole is located backing plate body centroid department, the through-hole is used for wire rope passes the backing plate body, the cell body connect in backing plate body one side, just the tank bottom intercommunication of cell body the through-hole, wire rope can pass the through-hole gets into the cell body, the cell body is used for setting first ground tackle.

Further preferably, the pad body and the groove body are integrally formed members.

Further preferably, a chamfer is arranged between the base plate body and the groove body, the structural performance is enhanced, and the deformation of the base plate body is reduced.

Preferably, the end part of the corrugated pipe is a sealing end, so that cement paste is prevented from being poured into the corrugated pipe when concrete is poured.

Further preferably, the end of the bellows is provided with a filler to form the sealed end.

Preferably, the first anchor is a clip anchor.

Preferably, the stretch-draw end node includes second anchor backing plate, second ground tackle, a plurality of reinforcing bar net piece and reserves the beard muscle, the second anchor backing plate passes through the horn tube and connects the bellows, all wire rope passes through the second ground tackle anchor in the second anchor backing plate, the second anchor backing plate is located the reinforcing bar net piece with in the steel reinforcement cage that the reservation beard muscle formed, after the prestressing tendons stretch-draw, pour the post-cast concrete among the stretch-draw end node.

Further preferably, the post-cast concrete is micro-expanded fine aggregate concrete.

Further preferably, the second anchor is a group anchor.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

according to the construction process with the bonding prestress for the skirt house frame beam construction, all the steel wire ropes in the prestressed tendons are dispersedly anchored through the first anchor backing plate and the corresponding first anchorage device, so that the problem of stress concentration on the skirt house frame beam structure around the first anchor backing plate after tension releasing is avoided; all the first anchor backing plates are arranged along a spherical surface, namely the bearing surfaces of all the first anchor backing plates are propped by an imaginary sphere, so that the bearing is more uniform, and the stability of an anchoring structure is facilitated; the construction process with the bonding prestress for the skirt house frame beam construction is simple in steps, convenient to operate and good in effect.

Drawings

FIG. 1 is a schematic flow chart of the construction process with bonding prestress for the construction of the skirt house frame beam according to the invention;

FIG. 2 is a schematic view of the structure of the fixed end of the skirt frame beam with the bonded prestressed tendons;

FIG. 3 is a schematic view of the construction of the first anchor pad;

fig. 4 is a schematic diagram of the structure of the skirt frame beam with the bonded prestressed tendon tensioning end.

The labels in the figure are: 1-steel wire rope, 2-corrugated pipe, 21-sealed end, 3-first anchor backing plate, 31-backing plate body, 32-through hole, 33-groove body, 34-chamfer, 4-first anchor, 5-second anchor backing plate, 6-second anchor, 7-reinforcing steel bar net piece, 8-reserved beard rib, and 9-post-cast concrete.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Examples

As shown in fig. 1 to 4, the bonded prestressed construction process for the skirt-house frame beam construction according to the present invention includes the following steps:

A. the steel wire rope fixing device comprises a plurality of steel wire rope 1 fixed length materials with bonding prestressed tendons, and an extrusion anchor assembly with a bonding prestressed tendon fixing end, wherein the extrusion anchor comprises a first anchor backing plate 3 and a corresponding first anchor 4, a corrugated pipe 2 with the bonding prestressed tendons and the steel wire rope 1 are transported to a laying part, each steel wire rope 1 is correspondingly provided with one first anchor backing plate 3, each first anchor backing plate 3 is correspondingly provided with one first anchor 4, each first anchor 4 is used for anchoring the end part of the steel wire rope 1 to the corresponding first anchor backing plate 3, all the first anchor backing plates 3 are arranged along a spherical surface, a skirt house frame beam bottom die is supported, and common steel bars of a binding beam are bound;

wherein, first anchor backing plate 3 includes backing plate body 31, through-hole 32 and cell body 33, through-hole 32 is located backing plate body 31 centroid department, through-hole 32 is used for wire rope 1 passes backing plate body 31, cell body 33 connect in backing plate body 31 one side, just the tank bottom intercommunication of cell body 33 through-hole 32, wire rope 1 can pass through-hole 32 gets into cell body 33, cell body 33 is used for setting up first ground tackle 4, backing plate body 31 with be equipped with chamfer 34 between cell body 33, strengthen the structural performance, reduce backing plate body 31 warp, prefers in this embodiment backing plate body 31 with cell body 33 is the integrated into one piece component, first ground tackle 4 is the splint formula anchor.

B. Binding control point high erection bars, laying the corrugated pipe 2, penetrating the steel wire rope 1, fixing the corrugated pipe 2, installing exhaust holes and tensioning end nodes with bonding prestressed bars; the method specifically comprises the following steps:

b1 preparation work before laying

Laying non-prestressed tendons: firstly, laying a non-prestressed reinforcement framework, and adopting a quick-release system for a floor slab template and a support to save the using amount of the template;

preparing an end die: according to the practical situation and the design requirement of the project, the embedded horn tube is fixed on the end die before die assembly, so the end die is prepared in advance, and the size of the end die is accurate;

preparing a frame stud: setting a frame rib at an interval of about 1.0m according to a design drawing, wherein the frame rib adopts a twisted steel bar with the diameter of 12 mm;

blanking of the corrugated pipe 2: during blanking, the length of a joint between pipes is not less than 30cm, two ends of the joint are respectively and completely screwed into the joint, the joint is sealed by using an adhesive tape, the pipe diameter of the connecting joint is required to be one size larger than the diameter of the pipeline, an exhaust hole is reserved in the corrugated pipe 2, the hole can also be used as a grouting hole during multi-span, and the pipe joint and the air outlet pipe are sealed by using a sealing adhesive tape to prevent slurry leakage;

blanking the prestressed tendons and assembling the fixed end extrusion anchor;

b2 laying the corrugated pipe 2

Erecting ribs by using a mounting rack: welding or binding the frame vertical bar and the stirrup firmly, wherein the position of the top surface of the frame vertical bar is determined by subtracting the radius of the corrugated pipe 2 from the rise from the plate bottom according to the center line of the prestressed bar shown in a drawing, and in order to ensure the rise accuracy and smooth curve of the prestressed bar, when the prestressed beam is constructed, the positioning bar is welded or bound firmly according to the requirement of the rise of the prestressed bar in a construction drawing and the position of the marked positioning bar;

installing a horn tube: installing the horn tube on an end die or a non-prestressed reinforcement framework according to the position shown by a design drawing;

penetrating the corrugated pipe 2: the corrugated pipe 2 is penetrated according to the drawing position, 4-5 persons are used for arranging along the two sides of the girder, the corrugated pipe 2 is penetrated from one end, after the pipes are completely penetrated, the two ends of the pipe are inserted into the positioned horn pipes, and the joint of the corrugated pipe 2 and the horn pipes is wound and sealed by using adhesive tapes, so that slurry leakage is avoided;

when the corrugated pipe 2 is laid, the corrugated pipe is strictly positioned according to the design drawing and the requirements of the construction scheme, and the size and the linear shape are ensured; the positioning of the horn tube needs to be accurate; the bellows 2 must be transversely arranged along a central line or be symmetrical to the central line, and S bending is not required; sealing all connecting parts such as the positions of the horn pipe and the corrugated pipe 2, the positions of reserved mounting group anchors at the tensioning end and the end heads of the exhaust holes, and sealing various joints by using adhesive tapes without slurry leakage; after laying and in the concrete pouring process, strictly preventing the corrugated pipe from being flattened and damaged, and strictly preventing the corrugated pipe 2 from being welded by gas;

b3, the steel wire rope 1 adopts a method of splitting for multiple penetration, the steel wire rope 1 needs to be blanked in a fixed length, the steel wire rope 1 is cut by using a grinding wheel saw and cannot be cut by electric welding, the prestressed reinforcing steel bars penetrate from a fixed end to a stretching end to avoid distortion, if the fixed end on site does not have a reinforcing steel bar penetrating position, the corrugated pipe 2 and the prestressed reinforcing steel bars are assembled well and are synchronously conducted with the non-prestressed reinforcing steel bars, and after the steel wire rope 1 penetrates into a hole channel, the electric welding cannot be used, so that the strength of the prestressed reinforcing steel bars is prevented from being reduced.

C. Binding a tensioning end reinforcing steel bar, a supporting beam side mold and a slab bottom, and laying a floor slab reinforcing steel bar; the method specifically comprises the following steps:

the length (reserved tensioning length) of the prestressed tendon extending out of the horn tube is required to meet the tensioning requirement; the interface between the horn tube and the corrugated tube 2 and the interface between the exhaust hole and the corrugated tube 2 are sealed firmly by applying an adhesive tape, so that slurry leakage is avoided; the end parts of the corrugated pipes at the stretching end and the fixed end are firmly plugged by using fillers, so that cement paste is prevented from being poured into the corrugated pipes when concrete is poured; the prestressed tendons must be vertical to the outer surface of the horn tube, and a straight line section which is not less than 30cm is needed behind the bearing plate; binding steel bar net sheets 7 as required after tensioning the tensioning ends of the prestressed tendons, and binding the steel bar net sheets 7 on each fixed end;

the end part of the corrugated pipe 2 is a sealing end 21, so that cement paste is prevented from being poured into the corrugated pipe 2 when concrete is poured, and the end part of the corrugated pipe 2 is provided with filler to form the sealing end 21.

D. Pouring concrete, erecting tensioning equipment, tensioning the prestressed tendons after the concrete reaches the tensioning strength, and grouting in the corrugated pipe 2 after tensioning is correct;

stretch-draw end node includes second anchor backing plate 5, second ground tackle 6, a plurality of reinforcing bar net piece 7 and reserves beard muscle 8, second anchor backing plate 5 is through the horn tube connection bellows 2, all wire rope 1 passes through 6 anchors of second ground tackle in second anchor backing plate 5, second anchor backing plate 5 is located reinforcing bar net piece 7 with in the reinforcing bar cage that reserves 8 formation of beard muscle, 6 anchor tackle of second ground tackle are group's anchor tackle.

E. Sealing the anchor by concrete at the end part of the prestressed tendon; after the prestressed tendons are tensioned, post-cast concrete 9 is poured in the tensioned end nodes, and in this embodiment, the post-cast concrete 9 is preferably C40 micro-expanded fine aggregate concrete.

By applying the construction process with bonding prestress for the skirt house frame beam construction, all the steel wire ropes 1 in the prestressed tendon are dispersedly anchored through the first anchor backing plate 3 and the corresponding first anchorage devices 4, so that the problem of stress concentration on the skirt house frame beam structure around the first anchor backing plate 3 after tension releasing is avoided; all the first anchor backing plates 3 are arranged along a spherical surface, namely the bearing surfaces of all the first anchor backing plates 3 are propped by an imaginary sphere, so that the bearing is more uniform, and the stability of an anchoring structure is facilitated; the construction process with the bonding prestress for the skirt house frame beam construction is simple in steps, convenient to operate and good in effect.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.