CN105484165B - Integrated prestress tensioning frame structure and manufacturing and using methods thereof - Google Patents

Abstract

The invention provides an integrated prestress tensioning frame structure which is used for tension construction of beam slabs by a post-tensioning method. The integrated prestress tensioning frame structure is a square frame, and moving wheels are installed at the bottom of the square frame; a clapboard is arranged in the middle of the square frame so as to divide the square frame into a left part and a right part, wherein the left part is a tensioning room, and the right part is an operating room; in the tensioning room, a lifting beam is welded at the bottom of a longitudinal beam at the top, a chain block is installed on the lifting beam, the chain block is connected with a jack, and a guard plate is arranged in the rear of the tensioning room; in the operating room, a bottom plate is arranged at the bottom of the frame, a top plate is arranged at the top, and a folding operating desk is installed on the clapboard; and a special fixing frame for fixedly placing an intelligent tensioning instrument is also arranged on the bottom plate, thereby ensuring that the intelligent tensioning instrument does not generate displacement in a moving process. The integrated prestress tensioning frame structure is simple, convenient to manufacture and low in cost; the operating room and the tensioning room form the integrated frame, so that the frame structure is convenient to move and simple in operation; and the guard plate and the clapboard are arranged, so that the safety in the construction process is effectively guaranteed on the premise that the line of sight of an operator in the operating room is not blocked.

Description

Integrated prestressed tension frame structure and method of making and using the same

technical field

The invention relates to the technical field of tension construction, in particular to an integrated prestressed tension frame structure and a method for making and using the same.

Background technique

At present, prestressed concrete structures have been widely used in the field of civil engineering because of their small cross-section, high rigidity, good crack resistance and durability. Among them, most of the prefabricated beams and slabs of bridge engineering adopt the post-tensioning prefabrication process, that is, after the concrete strength of the beams and slabs reaches a certain strength, the prestressed tendons are penetrated into the tunnel, and the prestressed tendons are stretched with concrete components as supports, and then used Special anchors anchor the prestressed tendons to form permanent prestressing. As we all know, the jack, one of the tensioning tools for applying prestress, is heavy (about 200kg), and it is necessary to use a prefabricated field gantry or a hand chain hoist with the help of an auxiliary herringbone bracket for displacement when changing the cable tension. At the same time, in order to avoid possible injuries caused by broken cables and slipping wires during the tensioning process, the operating regulations stipulate that no one is allowed to stand on the front of the beam at both ends of the tensioning process, and the operator should stand on the side of the prestressed steel strand. , a baffle shall be provided at the end of the beam.

In conventional construction, prefabricated gantry frames are often used for jack replacement and displacement, resulting in a low turnover rate of gantry frames or the beam-slab tensioning process is affected by the use of gantry frames. The beam end baffle generally adopts a simple triangular bracket baffle, which has low bearing capacity.

At the same time, intelligent tensioning, the most advanced technology in the field of prestressed tensioning in China, has been widely used. Intelligent tensioning refers to the use of computer intelligent control technology and automatic operation of instruments to complete the tensioning construction of steel strands without relying on manual control by workers. Because of its high precision and stability, it can completely eliminate the interference of human factors and effectively ensure the quality of prestressed tensioning construction. However, limited by site conditions, the instruments used for intelligent tensioning, especially computers, can only be temporarily placed in a place, exposed to wind and sun, and the working environment is harsh.

Contents of the invention

The purpose of the present invention is to provide an integrated prestressed tension frame structure and its production and use methods, to solve the problem of jack changing cables, shifting and lifting when intelligent tensioning of post-tensioned beams and slabs, and the placement of supporting equipment such as intelligent tensioners and computers problems, as well as protection and safety issues during the stretching process.

In order to realize the above-mentioned technical purpose, the present invention adopts following technical scheme:

An integrated prestressed tension frame structure, which is used in post-tensioned beam-slab intelligent tension construction. The whole is a square frame, which is welded by columns and horizontal beams connected between the columns. The horizontal beams include beams and beams. The longitudinal beam is characterized in that: moving wheels are installed on the corresponding positions of the bottom columns of the quadrangular frame; a partition is arranged between the two columns in the middle of the quadrangular frame, and the partition divides the quadrangular frame into There are two parts on the left and right, the left side is the tension room, and the right side is the operation room; in the tension room, a horizontal lifting beam is welded at the bottom of the two longitudinal beams on the top, and a chain hoist is installed on the lifting beam. The chain hoist is connected to the tensioning jack through a hook, and the prefabricated beam plate to be stretched enters from the front of the tensioning room horizontally, and a protective baffle is arranged at the back of the tensioning room; in the operation room, on the horizontal beam at the bottom of the frame A bottom plate is laid, a top plate is set on the top of the frame, and a folding operating table is installed on the partition; a special fixed frame for fixing the intelligent tensioner is also set on the bottom plate to ensure that it does not shift during the movement.

As a preferred technical solution, the separator is a perforated steel mesh plate with a thickness in the range of 10-20 mm and a mesh diameter in the range of 10-40 mm.

Preferably, the lifting beam and the chain block are connected through a hanging ring; the hanging ring is set on the lifting beam, and the chain block is hung on the bottom of the hanging ring.

Preferably, the foldable operating platform includes an operating platform and a foldable outrigger installed on the bottom surface of the operating platform, and the other end of the foldable outrigger is fixed on the wall of the partition.

Preferably, the operating table is a steel plate or a wooden board with a reinforced frame.

Preferably, both the top plate and the bottom plate are steel plates, the range of which is 5-20 mm, and the thickness of the protective steel plate is 10-20 mm.

Preferably, the height of the quadrangular frame is at least 500 mm higher than the maximum height of the prefabricated beam slab, the longitudinal length of the tension room is the width of the prefabricated beam slab plus 200 mm, and the longitudinal length of the operating room is 1000 mm; the transverse width of the quadrangular frame is The range is 1000mm.

Preferably, the beams, longitudinal beams and columns are all made of 14# channel steel; the lifting beam is made of 14# I-beam.

The present invention also provides the preparation method of the above-mentioned integrated prestressed tension frame structure, comprising the following steps:

Step 1. Material preparation: cutting channel steel to prepare longitudinal beams, beams and columns, cutting steel plates to form protective baffles, cutting punched plates to form partitions, and their dimensions are determined according to the cross-sectional dimensions of the prefabricated beams to be stretched;

Step 2. Weld the square frame: Weld and assemble the square frame, install 6 moving wheels on the corresponding positions of the bottom columns, and then set a partition between the two middle columns to divide the square frame into left and right parts. The tension room is on the left, and the operation room is on the right;

Step 3. Install the tensioning device in the tensioning room: Weld a horizontal lifting beam at the bottom of the two longitudinal beams on the top of the tensioning room, set a hanging ring on it to connect the chain hoist, and connect the lower part to the jack through the hook;

Step 4. Arrange supporting equipment in the operation room: lay the bottom plate on the bottom of the installation room, lay the top plate on the top, and install the folding operation table on the partition;

Step 5. A special fixed frame for fixing the smart tensioner is installed on the bottom plate of the operation room to ensure that it does not shift during the movement. At this point, the integrated prestressed tension frame structure is prepared.

In addition, the present invention also provides a method for using the above-mentioned integrated prestressed tension frame structure, which is characterized in that:

Step 1. Putting the frame structure in place: Push the integrated tension frame structure that has been processed and assembled, and use the moving wheels installed at the bottom to drag it to the front end of the prefabricated beam slab to be stretched, so that the tension room is facing the beam slab. The operating room is located on the right side of the beam end;

Step 2. Arrangement of the operating room: place the intelligent tensioner on the special fixed frame on the bottom plate of the operating room, open the folding operating table installed on the partition, place a computer on it, and carry out the work between the computer, the intelligent tensioner and the jack. data letter connection;

Step 3, Jack in place: Use the chain hoist hook installed on the lifting beam to connect the jack, and use the chain hoist to move the jack to the front of the prestressed bundle of the prefabricated beam slab to be stretched and fix it;

Step 4. Tensioning process: the operator is located in the operation room, performs intelligent instrument operation and computer control, and performs real-time recording and data line transmission;

Step 5. Shifting and changing beams: After the tensioning of one beam is completed, use the chain hoist to move the jack up, down, left, and right to change cables until all the prestressed beams of the beam and slab are completed;

Step 6. Place the jack on the bottom plate of the tensioning room, push the entire tensioning frame structure to move to the next prefabricated beam slab to be stretched, repeat the above steps 1 to 5, until all the beam slab tensioning work is completed.

The top of the tensioning room of the present invention is provided with a chain hoist for the cable replacement and displacement of the jack, the backboard is inlaid with the backboard and also serves as a protective steel plate, and the right frame on the side of the beam is set as an intelligent operation room for placing an intelligent tensioner and a computer , compared with the prior art, the technical advantage of the present invention is:

1. It is a mobile bracket with simple structure, easy processing and convenient movement;

2. There is an operation room where the intelligent tensioner and computer can be placed, which optimizes the construction environment. It is an integrated structure. When the construction point is transferred, you only need to push the operation frame to transfer. The transfer is convenient and no need for any instruments when using When the equipment is moved, the construction can be carried out directly, saving time and effort;

3. The protection effect is good. On the one hand, the back plate of the tension room is inlaid with the back plate and also serves as a protective steel plate. It is strong and reliable, and meets the requirements of relevant specifications. On the other hand, punching steel plates are set between the operation room and the tension room, which can effectively guarantee the safety of the operators during the construction process without blocking the sight of the operators in the operation room, and the security is good;

4. Existing materials in the project can be used for other materials, especially the small-sized components of the beam, except for the moving wheels, and the remaining channel steel materials can be fully utilized, and can be fully recycled after completion, with low input costs.

Description of drawings

Fig. 1 is the schematic diagram of the three-dimensional structure of the integrated prestressed tension frame structure involved in the present invention;

Fig. 2 is a top view structural schematic diagram of the integrated prestressed tension frame structure involved in the present invention;

Fig. 3 is a schematic diagram of the elevation structure of the integrated prestressed tension frame structure involved in the present invention.

Reference signs: 2-beam, 1-longitudinal beam, 3-lifting beam, 4-column, 5-moving wheel, 6-bottom plate, 7-protective baffle, 8-chain hoist, 9-prefabricated beam plate, 10 -Separator, 11-support frame, 12-prestressed beam, 13-top plate, 14-intelligent tensioner, 15-folding operation table, 15.1-operation table, 15.2-foldable outrigger, 16-hanging ring .

detailed description

The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

As shown in Figures 1 to 3, the present invention relates to an integrated prestressed tension frame structure, which is used in the intelligent tension construction of post-tensioned beams and slabs. The whole is a square frame, which is welded by columns 4 and horizontal beams connected between the columns. Formed, the horizontal beam includes a crossbeam 1 and a longitudinal beam 2, and it is characterized in that: a moving wheel 5 is installed on the corresponding position of the bottom column of the square frame, a total of six columns 4, corresponding to 6 moving wheels, the square A partition 10 is provided between the two columns in the middle of the body frame. The partition 10 is a punched steel mesh plate with a thickness ranging from 10 to 20 mm and a mesh diameter ranging from 10 to 40 mm, which divides the square frame. It is divided into left and right parts, the left side is the tension room, and the right side is the operation room; in the tension room, a horizontal lifting beam 3 is welded at the bottom of the top two longitudinal beams 2, and the lifting beam 3 is equipped with a hand The chain hoist 8 is connected between the lifting beam 3 and the chain block 8 through a hanging ring 16; the hanging ring 16 is set on the lifting beam 3, and the chain block 8 is hung on the bottom of the hanging ring 16. The chain block 8 is connected to the tensioning jack through a hook, and the prefabricated beam slab 9 to be stretched enters laterally from the front of the tensioning room, and a protective baffle 7 is arranged at the back of the tensioning room; A base plate 6 is laid on the horizontal beam at the bottom, and a top plate 13 is provided on the top of the frame to prevent sun and rain. A folding console 15 is installed on the partition 10, and the folding console 15 includes a console 15.1 and a foldable support leg 15.2 installed on the bottom surface of the console, the other end of the foldable leg 15.2 is fixed On the wall of the partition 10, the operating table 15.1 is a wood or steel plate with a reinforced frame. The bottom plate 6 is also provided with a special fixed frame for fixing the smart tensioner 14 to ensure that it does not shift during the moving process.

Among the materials used in the frame structure, the beam 1, longitudinal beam 2 and column 4 that make up the bracket are all made of 14# channel steel, the lifting beam 3 used to install the chain hoist on the top is made of 14# I-beam, the protective baffle 7 and the partition Plate 10 adopts 1cm thick steel plate as baffle plate, and the section steel and steel plate are all connected by welding. The height of the square frame is at least 500mm higher than the maximum height of the prefabricated beam slab 9, the longitudinal length of the tension room is the width of the prefabricated beam slab 9 plus 200mm, and the longitudinal length of the operation room is 1000mm; is 1000mm.

The present invention also provides the preparation method of the above-mentioned integrated prestressed tension frame structure, comprising the following steps:

Step 1. Material preparation: cut channel steel to prepare longitudinal beam 2, cross beam 1 and column 4, cut steel plate to form protective baffle 7, cut punched plate to form partition 10, and its size is based on the prefabricated beam to be stretched 9 The section size is determined;

Step 2. Weld the square frame: Carry out welding and assembly of the square frame, install six moving wheels 5 on the corresponding positions of the bottom columns, and then set a partition 10 between the middle two columns to divide the square frame into two left and right sides. part, the left side is the tension room, and the right side is the operation room;

Step 3. Install the tensioning device in the tensioning room: Weld a horizontal lifting beam 3 at the bottom of the two longitudinal beams 2 on the top of the tensioning room, set a hanging ring 16 on it to connect and install the chain hoist 8, and the lower part passes through the hook Connect the jack;

Step 4. Arrange supporting equipment in the operation room: lay the bottom plate 6 on the bottom of the installation room, lay the top plate 13 on the top, and install the folding operating table 15 on the partition 10;

Step 5: A special fixed frame for fixing the smart tensioner 14 is set on the bottom plate 6 of the operating room to ensure that it does not shift during the moving process. So far, the integrated prestressed tension frame structure is prepared.

In addition, the present invention also provides a method for using the above-mentioned integrated prestressed tension frame structure, which is characterized in that:

Step 1. Putting the frame structure in place: promote the integrated tension frame structure that has been processed and assembled, and drag it to the front end of the prefabricated beam plate 9 to be stretched by using the moving wheel 5 installed at the bottom, so that the tension room is facing the beam plate , the operating room is located on the right side of the beam end;

Step 2. Arrangement of the operation room: place the intelligent tensioner 14 on the special fixed frame on the bottom plate 6 of the operation room, open the folding operation table 15 installed on the partition 10, place a computer on it, and perform computer and intelligent tensioning. The data signal connection between instrument 14 and the jack;

Step 3, the jack is in place: use the chain hoist 8 hook installed on the lifting beam 3 to connect the jack, and use the chain hoist to move the jack to the front of the prestressed beam 12 to be stretched in the prefabricated beam slab and fix it;

Step 4. Tensioning process: the operator is located in the operation room, performs intelligent instrument operation and computer control, and performs real-time recording and data line transmission;

Step 5. Shifting and changing bundles: After the tensioning of one bundle is completed, use the chain block 8 to move the jack up and down, left and right, and change cables until all the prestressed bundles of the beam and slab are completed;

Step 6. Place the jack on the bottom plate of the tensioning room, push the entire tensioning frame structure to move to the next prefabricated beam slab to be stretched, repeat the above steps 1 to 5, until all the beam slab tensioning work is completed.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (9)

1. a kind of preparation method of integrated prestressed stretch-draw frame structure, the integrated prestressed stretch-draw frame structure, use In the construction of post stretching beam slab intelligent tensioning, generally tetragonal body framework, by column（4）And the horizontal beam being connected between column It is welded, the horizontal beam includes crossbeam（1）And longeron（2）, it is characterised in that：The bottom column pair of the tetragonal body framework Answer（5）；Dividing plate is provided between the middle two root posts of the tetragonal body framework（10）, the dividing plate （10）Tetragonal body framework is divided into into left and right two parts, the left side is that the right is operation room between tensioning；In between the tensioning, on top Two, portion longeron（2）Piece horizontal lifting beam of bottom welding（3）, the lifting beam（3）On chain block is installed（8）, The chain block（8）By linking up with the jack of connection tensioning, precast beam to be tensioned（9）It is horizontal from before between tensioning To entrance, between tensioning behind set up defences guard（7）；In the operation room, base plate is equipped with base of frame horizontal beam （6）, frame roof is provided with top board（13）, the dividing plate（10）On folding operation platform is installed（15）；The base plate（6）On also set Have for fixed in position intelligent tensioning instrument（14）Special fixed frame, it is ensured which is not shifted in moving process；

Characterized in that, comprising the steps：

Step one, material prepare：Cutting groove steel is for longeron（2）, crossbeam（1）And column（4）, cut steel plate and form protective baffle plate （7）, cut punched-plate and form dividing plate（10）, its size is all according to precast beam to be tensioned（9）Sectional dimension determine；

Step 2, welding tetragonal body framework：Carry out tetragonal body frame welding assembled, 6 are installed on bottom column correspondence position Movable pulley（5）, then dividing plate is set between middle two root posts（10）, tetragonal body framework is divided into into left and right two parts, the left side For, between tensioning, the right is operation room；

Step 3, tensioning equipment is installed between tensioning：Two longerons in top between tensioning（2）Bottom welding one it is horizontal rise Hanging beam（3）, hanging ring is set thereon（16）Chain block is installed in connection（8）, chain block bottom is by linking up with connection jack；

Step 4, operation room arrange corollary equipment：Lay base plate in operation room bottom（6）, top laying top board（13）, in dividing plate （10）Upper installation folding operation platform（15）；

Step 5, in operation room base plate（6）On set for fixed in position intelligent tensioning instrument（14）Special fixed frame, it is ensured that its It is not shifted in moving process, so far, integrated prestressed stretch-draw frame structure is prepared and completed.

2. the preparation method of integrated prestressed stretch-draw frame structure according to claim 1, it is characterised in that：It is described every Plate（10）For punching steel net plate, its thickness range is 10～20mm, and mesh diameter scope is 10～40mm.

3. the preparation method of integrated prestressed stretch-draw frame structure according to claim 1, it is characterised in that：Described Hanging beam（3）With chain block（8）Between pass through hanging ring（16）Connection；The hanging ring（16）It is sleeved on lifting beam（3）On, hang Link（16）Bottom be hung with chain block（8）.

4. the preparation method of integrated prestressed stretch-draw frame structure according to claim 1, it is characterised in that：The folding Folded operating board（15）Including operation platen（15.1）With the collapsible supporting leg on operation platen bottom surface（15.2）, it is described can Folding landing leg（15.2）The other end be fixed on dividing plate（10）Wall on.

5. the preparation method of integrated prestressed stretch-draw frame structure according to claim 4, it is characterised in that：The behaviour Make platen（15.1）For steel plate or with the plank for reinforcing frame.

6. the preparation method of integrated prestressed stretch-draw frame structure according to claim 1, it is characterised in that：The top Plate（13）And base plate（6）Steel plate is, thickness range is 5～20mm；The protective baffle plate（7）Thickness range be 10～ 20mm。

7. the preparation method of integrated prestressed stretch-draw frame structure according to claim 1, it is characterised in that：Described four The height of cube framework at least compares precast beam（9）The high 500mm of maximum height, the longitudinal length between tensioning be precast beam （9）Width add 200mm, the longitudinal length of operation room is 1000mm；The transverse width of tetragonal body framework is 1000mm.

8. the preparation method of integrated prestressed stretch-draw frame structure according to claim 1, it is characterised in that：The horizontal stroke Beam（1）, longeron（2）And column（4）It is 14# channel-section steels；The lifting beam（3）For 14# steel I-beams.

9. the using method of integrated prestressed stretch-draw frame structure, the integrated prestressed stretch-draw frame structure, after being used for Open in the construction of method beam slab intelligent tensioning, generally tetragonal body framework, by column（4）And the horizontal beam welding being connected between column Form, the horizontal beam includes crossbeam（1）And longeron（2）, it is characterised in that：The bottom column correspondence position of the tetragonal body framework Put and movable pulley is installed（5）；Dividing plate is provided between the middle two root posts of the tetragonal body framework（10）, the dividing plate（10） Tetragonal body framework is divided into into left and right two parts, the left side is that the right is operation room between tensioning；In between the tensioning, at top two Root longeron（2）Piece horizontal lifting beam of bottom welding（3）, the lifting beam（3）On chain block is installed（8）, it is described Chain block（8）By linking up with the jack of connection tensioning, precast beam to be tensioned（9）Laterally enter from before between tensioning Enter, between tensioning behind set up defences guard（7）；In the operation room, base plate is equipped with base of frame horizontal beam（6）, frame Top of the trellis is provided with top board（13）, the dividing plate（10）On folding operation platform is installed（15）；The base plate（6）On be additionally provided with for Fixed in position intelligent tensioning instrument（14）Special fixed frame, it is ensured which is not shifted in moving process；

Characterized in that, comprising the steps：

Step one, frame structure it is in place：The integrated prestressed stretch-draw frame structure for promoting processing assembly to complete, using bottom The movable pulley of installation（5）Drag to precast beam to be tensioned（9）Front end, make between tensioning just to precast beam, now operate Between be located at beam-ends on the right side of；

Step 2, operation room arrangement：By intelligent tensioning instrument（14）It is placed in operation room base plate（6）On special fixed frame on, beat Open dividing plate（10）The folding operation platform of upper installation（15）, computer is laid thereon, carries out computer, intelligent tensioning instrument（14）With it is very heavy Data signal connection between top；

Step 3, jack are in place：Using being installed on lifting beam（3）On chain block（8）By linking up with connection jack, profit Jack is displaced to into precast beam prestressing tendon to be tensioned with chain block（12）It is front and fixed thereto；

Step 4, stretching process：Operator are located at operation room, carry out the operation of intelligent tensioning instrument and computer control, carry out in real time Record and data transfer；

Beam is changed in step 5, displacement：After the completion of a branch of tensioning, using chain block（8）Carry out the upper and lower of jack and left and right is horizontal Beam is changed in displacement, until the whole tensioning of this film girder plate prestress beam is completed；

Step 6, jack is positioned on the base plate between tensioning, promotes whole tensioning frame structure to be moved to down a piece of treat Precast beam position is drawn, repeat the above steps one are to step 5, until completing whole beam slab tensioning work.