CN208267406U - Wall displacement support device under the high load action of reinforced concrete shear wall structure - Google Patents

Abstract

The utility model discloses a wall replacement supporting device under high load of a reinforced concrete shear wall structure, which belongs to the field of building structure reinforcement, and the structure includes a horizontal supporting system, a universal level, a vertical supporting system, a load applying and monitoring device , the horizontal support system includes the upper beam and the lower beam, the vertical support system includes the left vertical rod and the right vertical rod, the left vertical rod and the right vertical rod are symmetrically arranged between the upper beam and the lower beam, and the load application and monitoring device includes two groups , two sets of load application and monitoring devices are respectively arranged on the upper part of the left vertical pole and the right vertical pole. Each set of load application and monitoring devices includes a screw jack, a stress sensor and a stress display respectively. The stress sensor and the stress display are electrically connected, and the upper part of the upper beam A universal level is provided. The utility model has the characteristics of temporarily supporting the wall body, then chiseling away the old concrete, supporting the formwork to pour new concrete, thereby achieving the effect of concrete replacement and the like.

Description

Wall Replacement Support Device for Reinforced Concrete Shear Wall Structure under High Load

technical field

The utility model relates to the field of building structure reinforcement, in particular to a wall replacement support device under the high load of a reinforced concrete shear wall structure.

Background technique

At present, in the field of high-rise industrial and civil buildings, concrete structure is still one of the most widely used building structure types. This type has the characteristics of good mechanical performance, fast construction speed, high durability and relatively low construction cost. However, in the process of building construction, due to various reasons such as lax construction control and inadequate technical measures, there are inevitably situations where the structural construction quality does not meet the requirements of the design and related specifications, and its bearing capacity, comfort and stability will be greatly reduced. reduced, thus creating the field of reinforcement of concrete structures. According to my country's current "Concrete Structure Reinforcement Design Code" GB50367-2006, concrete structure reinforcement methods mainly include enlarging section method, replacing concrete method, external prestressing method, externally bonded steel and fiber composite material method and so on.

In the field of replacement concrete reinforcement, the concrete member to be replaced is generally supported with a support device before reinforcement. Existing support devices are generally composed of steel pipes, corbels and other components based on construction experience or simple calculations. The structure of this type of supporting device is relatively simple and rough. There is no accurate load monitoring system during the loading process. The installation and disassembly of the construction device are cumbersome and cannot be operated efficiently. Replacement of lesser components.

However, when the concrete of the high-rise reinforced concrete shear wall is replaced and reinforced, due to the high building height of the shear wall structure, the wall bears huge loads, complex forces, and narrow construction operation surfaces. The application of the above-mentioned conventional support devices has the disadvantages of rough loading, the inability to effectively calculate and monitor the load applied by the support devices, and huge loading errors. Because the support devices are large in size, it is often necessary to destroy the wall reinforcement in order to pass through the support. Considering the above characteristics, it will lead to an increase in the construction risk factor, a sharp increase in construction difficulty and risk. In addition, the replacement device often has no rated support load, poor construction cycleability, and poor economic benefits.

Utility model content

The technical task of this utility model is to provide a wall replacement support device under the high load of the reinforced concrete shear wall structure in view of the above-mentioned deficiencies in the prior art, and the wall replacement support device of the reinforced concrete shear wall structure under the high load Through the horizontal support system installed on the upper floor of the shear wall to be replaced and the corresponding position on the ground of the floor, and the vertical support system symmetrically installed between the horizontal support systems, the load application and monitoring device acting on the upper part of the vertical support system Apply load to the horizontal support system, temporarily support the wall, and then chisel out the old concrete, formwork and pour new concrete, so as to achieve the effect of concrete replacement.

The technical solution adopted by the utility model to solve its technical problems is: it includes a horizontal support system, a universal level, a vertical support system, load application and monitoring devices, the horizontal support system includes an upper beam and a lower beam, and the The upper beam and the lower beam are arranged correspondingly up and down, and the upper beam and the lower beam are respectively installed on the wall corresponding to the upper floor of the wall to be replaced and the wall near the bottom of the floor to be replaced. The vertical support system includes a left vertical pole and the right vertical rod, the left vertical rod and the right vertical rod are arranged symmetrically between the upper beam and the lower beam, and the load application and monitoring devices include two groups, and the two groups of load application and monitoring devices are respectively arranged on the left The upper part of the pole and the right vertical pole, each group of load application and monitoring devices respectively includes a screw jack, a stress sensor and a stress display. The screw jack is arranged on the upper part of the vertical support system, and the upper part of the screw jack is provided with a stress sensor. The upper beam, the stress sensor is electrically connected with the stress display, and the upper part of the upper beam is provided with a universal level.

The upper beam and the lower beam are respectively box-shaped steel beams with a cross-section of 155mm×155mm and a plate thickness of 20mm.

The left vertical rod and the right vertical rod are respectively round steel pipes, both ends of which are welded and sealed. The outer diameter of the round steel pipes is 159mm and the wall thickness is 20mm.

The screw jack is a mechanical rocker screw jack.

Compared with the prior art, the wall replacement support device of the reinforced concrete shear wall structure under the high load of the utility model has the following outstanding beneficial effects: optimize the design of each component of the device, and do not damage the wall and floor during installation Steel bars; each set of support devices has a rated support load; it has a load monitoring device, the load of the support device is applied accurately, and the added load can be monitored and increased or decreased in real time; it has simple and clear structure, clear force, safety and stability, and fast assembly speed, etc. Features, multiple sets of devices can be used at the same time, meet the modular construction requirements of high-rise shear wall reinforcement and replacement, suitable for high-efficiency cycle operations, greatly improve construction efficiency, and save construction costs.

Description of drawings

Accompanying drawing 1 is the main view structure schematic diagram of the wall replacement support device under the high load of reinforced concrete shear wall structure;

Accompanying drawing 2 is the axonometric view of the wall replacement support device under the high load of reinforced concrete shear wall structure;

Accompanying drawing 3 is the left side view of the wall replacement supporting device under the high load of reinforced concrete shear wall structure;

Accompanying drawing 4 is the top view of the wall replacement supporting device under the high load of reinforced concrete shear wall structure;

Accompanying drawing 5 is the schematic diagram of construction and installation of the wall replacement support device under the high load of reinforced concrete shear wall structure;

Explanation of reference signs: 1, horizontal support system; 11, upper beam; 12, lower beam; 2, vertical support system; 21, left vertical pole; 22, right vertical pole; 3, load application and monitoring device; 31, Screw jack; 32, stress sensor; 33, stress display; 4, universal level.

Detailed ways

With reference to accompanying drawings 1 to 5 of the description, the wall displacement support device of the utility model under the high load of the reinforced concrete shear wall structure is described in detail below.

The utility model relates to a reinforced concrete shear wall structure replacement support device for walls under high loads. Its structure includes a horizontal support system 1, a universal level 4, a vertical support system 2, and a load application and monitoring device 3. The horizontal The support system 1 includes an upper beam 11 and a lower beam 12. The upper beam 11 and the lower beam 12 are set up and down correspondingly. The upper beam 11 and the lower beam 12 are respectively installed on the wall corresponding to the upper floor of the wall to be replaced and the wall to be replaced. Near the bottom wall position of the floor, the vertical support system 2 includes a left vertical rod 21 and a right vertical rod 22, and the left vertical rod 21 and the right vertical rod 22 are arranged symmetrically between the upper beam 11 and the lower beam 12 , the load application and monitoring device 3 includes two groups, and two groups of load application and monitoring devices 3 are respectively arranged on the left vertical rod 21 and the right vertical rod 22 tops, and each group of load application and monitoring devices 3 includes screw jacks 31, Stress sensor 32 and stress display 33, screw jack 31 is arranged on the top of vertical support system 2, and the top of screw jack 31 is provided with stress sensor 32, and the top of stress sensor 32 is upper beam 11, and described stress sensor 32 and stress The display 33 is electrically connected, and the upper part of the upper beam 11 is provided with a universal level 4 . During installation, the upper beam 11 and the lower beam 12 in the horizontal support system 1 are adjusted to the level by the universal level 4, and the left pole 21, the right pole 22, the screw jack 31, and the stress sensor 32 are symmetrically arranged and kept vertical. After installation and forming, the components from bottom to top are: lower beam 12 , vertical support system 2 , screw jack 31 , stress sensor 32 , and upper beam 11 . The stress sensor 32 can monitor the change of the load all the time, and load or unload in real time through the screw jack 31 .

The upper beam 11 and the lower beam 12 are respectively box-shaped steel beams with a cross-section of 155mm×155mm and a plate thickness of 20mm. It is convenient to pass through the main reinforcement of the wall without damaging the main reinforcement.

The left vertical pole 21 and the right vertical pole 22 are round steel pipes respectively, both ends are welded and sealed, and the round steel pipes are fully welded, and the edges and corners are planed to facilitate passing through floors and walls; the outer diameter of the round steel pipes is 159 mm, and the wall 20mm thick. The left pole 21, the right pole 22, the upper crossbeam 11 and the lower crossbeam 12 are all designed through optimization, and the wall and floor steel bars will not be damaged during installation.

The screw jack 31 is a mechanical rocker screw jack.

Under the high load of the reinforced concrete shear wall structure, the wall replacement support device forms a simple support acceptance system, and the components are installed symmetrically, and the vertical components keep the axes aligned. Specifically: the upper beam 11 and the lower beam 12 are left-right symmetrical along the shear wall body; the left vertical pole 21 and the right vertical pole 22 are left-right symmetrical along the shear wall body; the screw jack 31 and the stress sensor 32 maintain axis alignment.

A set of reinforced concrete shear wall structure wall replacement support device under high load, its effective support load can reach 50 tons.

Each set of support devices has a rated support load and can be used in multiple sets at the same time.

Before the replacement and reinforcement of the high-rise reinforced concrete shear wall structure, the following preparatory work needs to be done:

Determine the vertical unloading force F of the wall to be replaced; determine the bearing capacity F ^* of a single support device in the laboratory; calculate the number of sets of support devices required n = F/F ^* .

The length of the wall to be replaced is determined according to the length L of the wall and the number of sets of support installations n to determine the length L*=L/n of the supporting wall corresponding to the single replacement device.

Determine the crossing position of the holes of each component of the supporting device. There are three types of opening positions for a single set of devices, namely: the horizontal opening of the upper wall of the wall to be replaced, which passes through the upper beam 11; the horizontal opening of the wall near the bottom of the floor to be replaced , the hole passes through the lower beam 12; the vertical hole at the floor slab of the wall is to be replaced, and the hole passes through the left vertical rod 21 and the right vertical rod 22.

After the leveling of the horizontal hole, pass through the upper beam 11 and the lower beam 12 respectively, and use the universal level 4 to level the upper beam 11 and the lower beam 12 and fix them in the center. With reference to shown in Fig. 5, left vertical rod 21 and right vertical rod 22 and screw jack 31 are respectively installed symmetrically at two ends. Shake the screw jacks 31 on both sides to about 100mm from the bottom of the upper beam 11, install the stress sensor 32 on the screw jack 31 (the stress-strain loading relationship of the sensor has been measured by the laboratory), and connect the stress monitor 33. Slowly shake the screw jack 31 until the stress sensor 32 is in contact with the bottom surface of the upper beam 11, and start loading. The loading process is strictly used according to the sensor laboratory standard. After the loading force stably reaches the design unloading value, the corresponding wall section is removed, and new concrete is poured with formwork.

Attention should be paid to the use of the wall replacement support device under the high load of the reinforced concrete shear wall structure: vertical poles, screw jacks 31, and stress sensors 32 should be strictly controlled to be consistent with the main axes to avoid eccentricity; during the loading process of the screw jacks 31 at both ends It should keep rising at a constant speed, and use the universal level 4 to control the upper beam 11 and the lower beam 12 to maintain the level; the loading of the screw jack 31 at all levels should be carried out in strict accordance with the laboratory stress-strain curve, and it should be used in conjunction with the stress sensor 32; , the reading of the stress sensor 32 should be strictly monitored, and the abnormal point of the value change should be judged in time to take corresponding supplementary pressure or adjustment measures.

Under the high load of the reinforced concrete shear wall structure of the utility model, the wall replacement support device has the following effects:

The jack, the stress sensor 32 and the stress display 33 can cooperate to detect the supporting load, and compare it with the designed supporting load. The addition and subtraction of the load is flexible and accurate; safe and reliable;

The upper and lower beams 12 are conveniently installed. The lower beam 12 is located at the wall to be replaced near the bottom of the floor; the upper beam 11 is located about 1m above the upper floor. The height is convenient for workers to operate without the need for scaffolding and fences. efficient;

Except for the lower beam 12 at the bottom and the left vertical rod 21 and the right vertical rod 22 at the replacement wall, this device has no relevant components to block, which is beneficial to the construction of formwork; the concrete pouring port is located on the upper floor, which is conducive to concrete pouring and compaction. The construction quality is guaranteed;

Because the left vertical pole 21, right vertical pole 22, upper beam 11, and lower beam 12 are all optimized in section under the premise of ensuring bearing capacity, the holes (walls and floors) do not need to be too large, and the wall and floor components do not need to damage the structure original steel bar;

Each group has a fixed limit load, and multiple groups can be used at the same time, which is convenient for cyclic operation.

The implementation methods listed above are only for understanding the utility model, and are not intended to limit the technical solutions described in the utility model. Those of ordinary skill in the relevant field can also make many modifications on the basis of the technical solutions described in the claims. All equivalent changes or modifications shall fall within the protection scope of the claims of the present utility model. The parts of the utility model that are not described in detail are the known techniques of those skilled in the art.

Claims (4)

1. The wall replacement support device under the high load of reinforced concrete shear wall structure is characterized in that it includes a horizontal support system, a universal level, a vertical support system, load application and monitoring devices, and the horizontal support system includes the above The crossbeam and the lower crossbeam, the upper and lower crossbeams are set up and down correspondingly, the vertical support system includes a left vertical rod and a right vertical rod, and the left vertical rod and the right vertical rod are arranged symmetrically between the upper crossbeam and the lower crossbeam. Between the crossbeams, the load applying and monitoring devices include two groups, and the two groups of load applying and monitoring devices are respectively arranged on the upper part of the left vertical pole and the right vertical pole, and each group of load applying and monitoring devices includes screw jacks, stress sensors and Stress indicator, the screw jack is arranged on the upper part of the vertical support system, the upper part of the screw jack is provided with a stress sensor, the upper part of the stress sensor is an upper beam, and the stress sensor is electrically connected with the stress indicator, and the upper part of the upper beam is arranged There is a universal level. 2. The wall replacement support device for reinforced concrete shear wall structure under high load according to claim 1, characterized in that: the upper beam and the lower beam are respectively box-shaped steel beams with a cross-section of 155mm×155mm , the plate thickness is 20mm. 3. The wall replacement support device under the high load of reinforced concrete shear wall structure according to claim 1, characterized in that: the left vertical rod and the right vertical rod are respectively round steel pipes, welded and sealed at both ends, round The outer diameter of the steel pipe is 159mm, and the wall thickness is 20mm. 4. The wall displacement support device for reinforced concrete shear wall structure under high load according to claim 1, characterized in that: said screw jack is a mechanical rocker type screw jack.