Active control corner post jacking and underpinning structure capable of avoiding damage to existing structural beam

Abstract

The utility model provides an active control corner post jacking and underpinning structure capable of preventing an existing structural beam from being damaged. The active control corner post jacking and underpinning structure capable of preventing the existing structural beam from being damaged comprises a set of PLC synchronous jacking jack systems, a set of PLC synchronous jacking jack systems and a set of PLC synchronous jacking jack systems, wherein the PLC synchronous jacking jack systems are arranged below a frame beam of a jacking corner post; and the counter-force supporting devices are used for bearing the jacking force effect in the jacking process, and the pressure effect is borne by the existing reinforced concrete structural beam. According to the active control corner column jacking and underpinning structure capable of avoiding the damage to the existing structural beam, the bending moment and the shearing force effect which are borne by the existing frame beam and generated due to the jacking load effect can be reduced, the damage possibly caused in the corner column jacking and underpinning process of the existing beam structure is actively prevented in advance, and the economic and safety requirements of construction are met; under the condition that existing structural members are not reinforced, the purposes of safety and economical efficiency of construction can be achieved through the method.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building structure reinforcement reconstruction, especially relates to a kind of active control angle column jacking underpin structure for avoiding existing structure beam damage. BACKGROUND

[0002] The current existing building is large in quantity and wide in range, among them, about 30%~50% of the existing buildings have obvious safety reduction or functional recession phenomenon due to the reasons such as approaching or exceeding design service life, original design standard being low, construction defects and poor maintenance management, and the demand for reinforcement and reconstruction of existing structure increases; the jacking underpin construction method is a commonly used method in the construction of seismic reinforcement and reconstruction or seismic pad replacement of existing structure.

[0003] Jacking underpin is a commonly used civil engineering construction method, which is widely used in various scenes, such as adjusting foundation stiffness to reduce settlement, building and removing temporary support system of building, adjusting position of structural member, adding seismic device at position of existing building structure foundation, etc. However, the existing jacking device has some problems in use, such as safety risk: the jacking force in the jacking underpin process can reach 5000kN or more, and if the balance relationship between forces is not handled well in the operation process, the workpiece will be inclined and deviated, and even the existing structure will be damaged beyond its bearing capacity limit, thereby causing safety accident; contact surface limitation: the jacking underpin working surface of angle column is narrow, and the replacement of jacking structure measures is limited, the position of seismic support is limited, and the jack cannot be arranged symmetrically; economic problem: if the existing structural member is to be reinforced to meet the temporary member for bearing jacking force, at this time, the reinforcement is difficult, the cost is high, and the reliability is poor. In order to improve the operation and safety performance of the existing jacking device, it is an urgent need of the industry to develop a new type of more efficient and safe underpin construction method and corresponding jacking underpin device.

[0004] Therefore, it is necessary to provide an active control angle column jacking underpin structure for avoiding damage of existing structure beam to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] In order to solve the technical problems of safety risk, contact surface limitation and high cost of the existing jacking device in use, the utility model provides an active control angle column jacking underpin structure for avoiding damage of existing structure beam.

[0006] The active control angle column jacking underpin structure for avoiding damage of existing structure beam provided by the utility model comprises: a group of PLC synchronous jacking jack systems, which are arranged below the frame beam of jacking angle column; a group of counterforce supporting devices, which are used to bear the jacking force in the jacking process, and the pressure is borne by the existing reinforced concrete structure beam.

[0007] Preferably, the counterforce supporting device comprises a box-shaped steel beam, two T-shaped section steel pull rods, a column steel, and a reinforced concrete structure beam serving as a compression rod of the counterforce supporting system; the end cover plate of the box-shaped steel beam is welded to the T-shaped section steel pull rod, and the T-shaped section steel pull rod is welded to the column steel at the other end; the column steel is fixed to the existing structure column by pouring A-grade structure glue.

[0008] Preferably, the PLC synchronous jacking system comprises a support device lateral limiting plate, a steel cushion block, upper and lower PLC synchronous jacking systems, a bottom steel cushion plate, a box-shaped steel column, a box-shaped steel column bottom plate, and a top steel cushion plate; the support device lateral limiting plate clamps the two sides of the existing reinforced concrete structure beam of the building, and is fixed between the box-shaped steel beam by welding; the box-shaped steel column is located between the existing reinforced concrete structure beam and the upper PLC synchronous jacking system, and is provided with the bottom steel cushion plate at the upper end and the box-shaped steel column bottom plate at the lower end; the existing reinforced concrete structure beam is provided with the top steel cushion plate, the lower PLC synchronous jacking system, the steel cushion block, and the bottom steel cushion plate arranged between the bottom of the jacking system and the top of the support structure.

[0009] Preferably, the two jacking systems on the same jacking force line, i.e., the upper and lower PLC synchronous jacking systems, are connected in series by high-pressure oil pipes or are controlled separately, and are used to actively control the output of the two jacking systems, so as to control the bending moment and shear force borne by the existing reinforced concrete structure beam in construction, and to avoid damage to the existing reinforced concrete structure beam.

[0010] Preferably, the steel cushion block is composed of multiple steel plates, and the specifications and thicknesses of the steel plates are selected according to the actual situation on site.

[0011] Preferably, the support device lateral limiting plate is welded with a stiffener plate on one side, and the thickness of the stiffener plate is 10 mm.

[0012] Preferably, the angles between the two T-shaped section steel pull rods and the vertical direction are 30° and 75° respectively, and the above angles can take different values for specific projects.

[0013] Compared with the related art, the active control angle column jacking and underpinning structure for avoiding damage to the existing structure beam has the following beneficial effects:

[0014] The active control angle column jacking and underpinning structure for avoiding damage to the existing structure beam comprises a support device, a jacking system, and a steel cushion block.

[0015] 1. The PLC synchronous jacking jack system for actively controlling and avoiding damage to the existing reinforced concrete structure beam, which is simple to install, actively controls the oil pressure of two jacks on the same jacking force line to provide the same or different jacking force and jacking reaction force, avoids or reduces the bending moment and shear force generated by the jacking force on the existing frame beam structure, and actively protects the existing reinforced concrete structure beam.

[0016] 2. In the jacking and underpinning construction process, the forces of each component are reasonable, the load of the jack is transmitted to the reaction support device, the T-shaped cross-section steel pull rod bears the axial tension, and the existing reinforced concrete structure beam also bears the pressure as a compression rod, so that the components bear reasonable and efficient forces, the construction is safe, reliable, economical and controllable in cost.

[0017] 3. In addition, in the jacking and underpinning construction process, the need for large-scale additional reinforcement or reconstruction of the existing structure due to the jacking force can be avoided or reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, a brief introduction to the drawings needed in the embodiment or prior art description will be given below, and obviously, other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 The structure diagram of the connection relationship between the upper and lower PLC synchronous jacking jacks and the existing reinforced concrete structure beam 13 in the present application is shown in the figure.

[0020] Figure 2 The top view of the corner column jacking system in the present application is shown in the figure.

[0021] Figure 3 The front view of the position relationship between the jacking corner column and the steel pull rod of the reaction device in the present application is shown in the figure.

[0022] Figure 4 The structure diagram of the connection between the end cover plate of the box-shaped steel beam and the end head of the T-shaped cross-section steel pull rod in the present application is shown in the figure.

[0023] Figure 5 The enlarged view of part A shown in the figure. Figure 3

[0024] The enlarged view of part B shown in the figure. Figure 6 Figure 3

[0025] Figure 7 The angle diagram of the two T-shaped cross-section steel pull rods in the present application is shown in the figure.

[0026] ​​The figure mark: 1, support device lateral limit plate; 2, box type steel beam; 3, steel cushion block; 4-1, upper PLC synchronous jacking jack; 4-2, lower PLC synchronous jacking jack; 5, bottom steel cushion plate; 6, box type steel column; 7, box type steel column bottom plate; 8, top steel cushion plate; 9, T-shaped section steel pull rod; 10, column steel; 11, lower support component; 12, shock isolation pad; 13, existing reinforced concrete structure beam; 14, jacking angle column; 15, jack bottom support structure. DETAILED DESCRIPTION

[0027] The utility model will be further described below in combination with the drawings and embodiments, obviously, the described embodiment is only a part of the utility model embodiment, not all embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of the utility model protection.

[0028] Embodiment one:

[0029] Please combine with Figures 1-7 , wherein, Figure 1 It is the structure schematic diagram of the connection relation between the upper and lower two PLC synchronous jacking jacks in the utility model and the existing reinforced concrete structure beam 13;

[0030] Figure 2 It is the plan view of the angle column jacking system in the utility model; Figure 3 It is the front view of the position relation between the jacking angle column and the steel pull rod of the counterforce device in the utility model; Figure 4 It is the structure schematic diagram of the end plate of the box type steel beam and the end head connection of the T-shaped section steel pull rod in the utility model; Figure 5 It is Figure 3 The enlarged schematic view of part A shown in the figure; Figure 6 It is Figure 3 The enlarged schematic view of part B shown in the figure; Figure 7 It is the angle schematic diagram of the two T-shaped section steel pull rods in the utility model.

[0031] An active control angle column jacking and replacing structure for avoiding existing structure beam damage, comprising: a group of PLC synchronous jacking jack systems and a group of counterforce support devices, the PLC synchronous jacking jack system is arranged below the frame beam of the jacking angle column 14, and is used for actively controlling and avoiding existing structure beam damage;The counterforce support device is used for bearing the jacking force in the jacking process, and the pressure action is borne by the existing reinforced concrete structure beam 13.

[0032] As shown in Figures 3-4 , the counterforce support device comprises a box type steel beam 2, two T-shaped section steel pull rods 9, a column steel 10, and an existing reinforced concrete structure beam 13 which is used as a compression rod of the counterforce support system.

[0033] The T-shaped section steel pull rod 9 is arranged between the jacking corner column 14 to be jacked and the adjacent existing structure column, the end cover plate of the box-shaped steel beam 2 is welded with the T-shaped section steel pull rod 9, and the T-shaped section steel pull rod 9 is welded with the column package steel 10 at the other end, and the specific connection mode is shown in Figure 4 The T-shaped section steel pull rod 9 is used to bear the axial tension generated by the jacking action, and the existing reinforced concrete structure beam 13 is used as a compression rod to bear the pressure generated by the jacking action, and the box-shaped steel beam 2 transmits the jacking force of the jack to the truss type counterforce support device composed of the T-shaped section steel pull rod 9 and the existing reinforced concrete structure beam 13 used as a compression rod through the cover plate.

[0034] The column package steel 10 is fixed between the existing structure column by pouring A-grade structure glue, so that the jacking counterforce is finally transmitted to the existing structure beam column joint.

[0035] In the jacking and underpinning construction process, each component is reasonably stressed, the load of the jack is transmitted to the counterforce support device, the T-shaped section steel pull rod 9 bears the axial tension, and the existing reinforced concrete structure beam 13 is used as a compression rod to bear the pressure, so that the component is reasonably and efficiently stressed, the construction is safe and reliable, and the cost is economic and controllable.

[0036] As shown in Figures 1-2 The PLC synchronous jacking jack system includes a support device side limiting plate 1, a steel cushion block 3, upper and lower PLC synchronous jacking jacks 4-1 and 4-2, a bottom steel cushion plate 5, a box-shaped steel column 6, a box-shaped steel column bottom plate 7, and a top steel cushion plate 8.

[0037] The support device side limiting plate 1 clamps the two sides of the existing reinforced concrete structure beam (in this example, the existing stair platform beam, and in other cases, the existing frame beam structure of the current layer) of the building, and is fixed between the box-shaped steel beam 2 through welding, so as to provide lateral constraint for the counterforce support device and ensure the out-of-plane stability of the counterforce support device.

[0038] The box-shaped steel column 6 is located between the existing reinforced concrete structure beam 13 and the upper PLC synchronous jacking jack 4-1, and is used to transmit the jacking force in the jacking process, the upper end is provided with the bottom steel cushion plate 5, and the lower end is provided with the box-shaped steel column bottom plate 7.

[0039] The existing reinforced concrete structure beam 13 is provided with the top steel cushion plate 8, the lower PLC synchronous jacking jack 4-2, the steel cushion block 3, and the bottom steel cushion plate 5 arranged between the bottom of the jack and the top of the support structure 15, so as to ensure the uniformity of the pressure generated by the jacking action borne by the existing structure beam and ensure the safety of the existing structure beam under the axial pressure action.

[0040] Two jacks on the same lifting force action line, namely the upper PLC synchronous jacking jack 4-1 and the lower PLC synchronous jacking jack 4-2, are connected in series or controlled independently by high-pressure oil pipes, and are used to actively control the output of the two jacks to control the bending moment and shear force borne by the existing reinforced concrete structure beam 13 in construction, so that the existing reinforced concrete structure beam 13 can be prevented from being damaged.

[0041] The steel cushion block 3 is composed of multiple steel plates, and the specifications and thicknesses of the steel plates are selected according to actual conditions on site.

[0042] The stiffening plate is welded on one side of the lateral limiting plate 1 of the supporting device, and the thickness of the stiffening plate is 10 mm.

[0043] The angles between the two T-shaped section steel pull rods 9 and the vertical direction are 30° and 75°, respectively, and the above angles can take different values for specific projects.

[0044] The PLC synchronous jacking jack system actively controls the damage of the existing structure beam, is simple to install, actively controls the output of the two jacks on the same lifting force action line by controlling the oil pressure in the upper PLC synchronous jacking jack 4-1 and the lower PLC synchronous jacking jack 4-2 connected in series or controlled independently, avoids or reduces the bending moment and shear force generated by the existing structure beam due to jacking, makes the existing structure beam mainly bear the action of axial pressure, ensures the safety and economy of construction, and after the jacking angle column 14 is jacked up, the isolation pad 12 on the lower supporting member 11 can be reinforced or replaced.

[0045] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed.

Claims

1. An active control corner column lifting and underpinning structure to avoid damage to existing structural beams, characterized in that: include: A set of PLC synchronous lifting jack systems, which are arranged under the frame beams that lift the corner columns; A set of reaction force support devices, which are used to bear the lifting force during the jacking process, while the pressure effect is borne by the existing reinforced concrete structural beams; The PLC synchronous lifting jack system includes a supporting device lateral limit plate, a steel pad, an upper PLC synchronous lifting jack and a lower PLC synchronous lifting jack, a bottom steel pad, a box-shaped steel column, a box-shaped steel column bottom plate, and a top steel pad; The support device clamps the two sides of the existing reinforced concrete structural beam of the building on the side limit plate, and is fixed to the box steel beam by welding. The box-shaped steel column is located between the existing reinforced concrete structural beam and the upper PLC synchronous lifting jack, with a bottom steel pad set at the upper end and a box-shaped steel column bottom plate set at the lower end; A top steel pad, a lower PLC synchronous lifting jack, a steel pad and a bottom steel pad arranged between the bottom of the jack and the top of the supporting structure are arranged at the lower part of the existing reinforced concrete structural beam.

2. The active control corner column lifting and underpinning structure for avoiding damage to existing structural beams according to claim 1 is characterized in that: The reaction support device comprises a box-shaped steel beam, two T-section steel tie rods, steel-clad columns, and an existing reinforced concrete structural beam that also serves as a compression rod of the reaction support system; The end caps of the box-shaped steel beams are welded to the T-section steel tie rods, and the T-section steel tie rods are welded to the column cladding steel at the other ends; The column steel cladding is fixed to the existing structural column by injecting Class A structural adhesive.

3. The active control corner column lifting and underpinning structure for avoiding damage to existing structural beams according to claim 1 is characterized in that: The two jacks on the same lifting force line, namely the upper PLC synchronous lifting jack and the lower PLC synchronous lifting jack, can be connected in series or controlled individually by a high-pressure oil pipe, and are used to actively control the output of the two jacks to control the bending moment and shear force borne by the existing reinforced concrete structural beams during construction.

4. The active control corner column lifting and underpinning structure for avoiding damage to existing structural beams according to claim 1 is characterized in that: The steel pad is composed of multiple steel plates, and the specifications and thickness of the steel plates are selected according to the actual situation on site.

5. The active control corner column lifting and underpinning structure for avoiding damage to existing structural beams according to claim 1 is characterized in that: A stiffening plate is welded to one side of the lateral limiting plate of the support device, and the thickness of the stiffening plate is 10 mm.

6. The active control corner column lifting and underpinning structure for avoiding damage to existing structural beams according to claim 2 is characterized in that: The included angles between the two T-section steel tie rods and the vertical direction are 30° and 75° respectively. The above included angles can take different values ​​according to specific projects.

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