CN114893019A - Shear wall structure underpinning structure and construction method thereof - Google Patents
Shear wall structure underpinning structure and construction method thereof Download PDFInfo
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- CN114893019A CN114893019A CN202210746910.9A CN202210746910A CN114893019A CN 114893019 A CN114893019 A CN 114893019A CN 202210746910 A CN202210746910 A CN 202210746910A CN 114893019 A CN114893019 A CN 114893019A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0229—Increasing or restoring the load-bearing capacity of building construction elements of foundations or foundation walls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/14—Bracing or strutting arrangements for formwalls; Devices for aligning forms
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/246—Safety or protective measures preventing damage to building parts or finishing work during construction specially adapted for curing concrete in situ, e.g. by covering it with protective sheets
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
- E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
- E04G25/065—Shores or struts; Chocks telescopic with parts held together by positive means by a threaded nut
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
- E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
- E04G25/066—Shores or struts; Chocks telescopic with parts held together by positive means by a wedge
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
- E04G2025/047—Shores or struts; Chocks telescopic which telescoping action effected by a piston
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention belongs to the technical field of building construction, and discloses a shear wall structure underpinning structure and a construction method thereof, wherein the underpinning structure is arranged on two sides of a shear wall and comprises an upper cross beam and a lower cross beam, and supporting plates which horizontally penetrate through the shear wall are fixed between the adjacent upper cross beam and the adjacent lower cross beam; grooves are formed in the opposite surfaces of the upper cross beam and the lower cross beam; a plurality of hydraulic jacking devices are vertically arranged between the upper cross beam and the lower cross beam, mounting seats are hinged to two ends of each hydraulic jacking device, the mounting seats are connected into corresponding grooves in a sliding mode, and locking devices are arranged between the mounting seats and the grooves; auxiliary supporting structures which are abutted against the wall feet of the shear wall are arranged on the opposite end surfaces of the upper cross beam and the lower cross beam; the invention aims to solve the problems of low construction efficiency, complex process and long time consumption existing in the traditional method; and the safety is poor, the intelligent level of the traditional support system is low, and the safety of the whole support process is difficult to ensure.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a underpinning structure of a shear wall structure and a construction method thereof.
Background
Because the forming is convenient and fast, the stress performance is good, and the reinforced concrete shear wall component is used as an important stress component and is widely applied to building structures. In the practical engineering application process, if construction quality defects exist or the reinforcing and modifying are changed due to building functions, structural underpinning and modifying are needed to be carried out on the shear wall member.
The traditional method flow comprises the steps of installing a temporary supporting system, removing wall concrete, binding or replacing reinforcing steel bars, erecting a formwork, pouring the concrete, removing the formwork after the concrete reaches the strength, removing the supporting system and the like.
The traditional construction method has the defects that: 1) the cast-in-place wall body is long in time consumption and temporary support service time, and is difficult to rapidly transfer, so that the construction efficiency is low, the process is complicated, and the time consumption is long; 2) the safety is poor, the supporting system is simple and crude, and the safety of the whole supporting process is difficult to guarantee.
Disclosure of Invention
In view of the above, the invention discloses a shear wall structure underpinning structure and a construction method thereof, aiming at solving the problems of low construction efficiency, complex process and long time consumption of the traditional method; and the safety is poor, the intelligent level of the supporting system is low, and the safety of the whole supporting process is difficult to ensure.
In order to achieve the purpose, the invention provides the following technical scheme:
a shear wall structure underpinning structure comprises underpinning structures arranged on two sides of a shear wall, wherein each underpinning structure comprises an upper cross beam and a lower cross beam, and supporting plates horizontally penetrating through the shear wall are fixed between the adjacent upper cross beams and the adjacent lower cross beams; grooves are formed in the opposite surfaces of the upper cross beam and the lower cross beam; a plurality of hydraulic jacking devices are vertically arranged between the upper cross beam and the lower cross beam, mounting seats are hinged to two ends of each hydraulic jacking device, the mounting seats are connected into corresponding grooves in a sliding mode, and locking devices are arranged between the mounting seats and the grooves; and auxiliary supporting structures which are abutted against the wall feet of the shear wall are arranged on the opposite end surfaces of the upper cross beam and the lower cross beam.
In the scheme, the position of the hydraulic jacking device can be adjusted through the movement of the mounting seat, so that the upper and lower parts of the shear wall can be guaranteed to be exerted with jacking force, meanwhile, the area to be replaced of the shear wall can be exposed, the replacement of a wall body is facilitated, and the laying of a template in the pouring process is facilitated; after the wall body is replaced, the position of the hydraulic jacking device can be adjusted again, so that the hydraulic jacking device is uniformly distributed, the uniform stress of the shear wall is guaranteed, and the deformation of a replacement area of the shear wall is prevented.
Furthermore, the locking device comprises a supporting screw rod horizontally fixed in the groove, the supporting screw rod is parallel to the groove, a mounting hole coaxial with the supporting screw rod is formed in the side wall of the mounting seat, an adjusting cylinder in threaded connection with the supporting screw rod is rotatably connected in the mounting hole, and power equipment for driving the adjusting cylinder to rotate is arranged on the mounting seat; connecting grooves penetrating through the mounting seat are horizontally formed in two sides of the mounting hole, coaxial bolts are connected to two ends of each connecting groove in a sliding mode, an electromagnet is arranged in the middle of each connecting groove, and a return spring is arranged between each electromagnet and each bolt; a plurality of equidistant first spacing grooves are formed in the two sides of the groove, a plurality of second spacing grooves are formed in the periphery of the adjusting cylinder, and the first spacing grooves and the second spacing grooves are used for accommodating bolts.
Electrifying the electromagnet, sucking the bolt into the connecting groove by the electromagnet, and unlocking the mounting seat and the adjusting cylinder; the mounting seat is driven to move by rotating the adjusting cylinder, the position of the hydraulic jacking device is adjusted by synchronously moving the mounting seats at the two ends of the hydraulic jacking device, the replacement area of the shear wall is exposed, the pouring operation of the replacement area is convenient, the electromagnet is powered off after the adjustment is finished, the bolt slides into the corresponding first limiting groove and the second limiting groove under the action of the reset spring, and the mounting seat and the adjusting cylinder are locked; after the installation of the replaced wall body, the position of the hydraulic jacking device is adjusted again, so that the hydraulic jacking device is reasonably distributed, the stress of the shear wall is ensured to be uniform, and the deformation of the replacement area of the shear wall is prevented.
Pre-estimating a jacking angle according to the condition of the shear wall, and adjusting the angle on the hydraulic jacking device according to the jacking angle; when the jacking angle is adjusted, the electromagnet is electrified again, and the bolt is sucked into the connecting groove again by the electromagnet, so that the mounting seat and the adjusting cylinder are unlocked; the adjusting cylinder is rotated to drive the mounting seats at one end of the hydraulic jacking device to move or the mounting seats at two ends of the hydraulic jacking device are different in moving direction, so that the hydraulic jacking device horizontally and transversely inclines, and the purpose of adjusting the horizontal transverse angle of the hydraulic jacking device is achieved.
Furthermore, moving grooves perpendicular to the shear wall are horizontally formed in the opposite surfaces of the mounting seat, connecting seats are connected in the moving grooves in a sliding mode along the axial direction of the moving grooves, and two ends of the hydraulic jacking device are respectively hinged with the mounting seat through spherical hinges connected with the corresponding connecting seats; and a pushing hydraulic cylinder is arranged between one end of the connecting seat and the moving groove.
The connecting seat horizontal longitudinal movement of hydraulic jacking device one end is driven through the pushing hydraulic cylinder or the connecting seat moving directions at the two ends of the hydraulic jacking device are different, so that the hydraulic jacking device is horizontally and longitudinally inclined, the purpose of adjusting the horizontal longitudinal angle of the hydraulic jacking device is achieved, the hydraulic jacking device is horizontally and transversely adjusted through the matching mounting seat, the purpose of adjusting the jacking angle in all directions is achieved, and the jacking angle is adjusted more accurately.
Further, the auxiliary supporting structure comprises a rectangular cushion block and a sliding groove formed in the opposite end faces of the upper cross beam and the lower cross beam, a support is connected to the sliding groove in a sliding mode, an adjusting screw rod is connected to the upper vertical sliding mode, the rectangular cushion block is connected to the top end of the adjusting screw rod in a spherical hinge mode, and the support is rotatably connected with an adjusting nut connected with the adjusting screw rod in a threaded mode.
After the underpinning structure is installed, the positions of the supports are adjusted according to requirements, the fastening nuts are rotated reversely until the rectangular cushion blocks are attached to the corresponding floor slabs, partial acting force for jacking the shear wall is distributed to the floor slabs, and the phenomenon that the shear wall is deformed due to overlarge acting force in the jacking process is avoided, so that the normal shearing prevention function of the shear wall is influenced.
Further, press from both sides the structure and include that circular array distributes the arc splint in spherical cavity department, the intrados of arc splint with connect the ball laminating, the stiff end of arc splint in rectangle cushion inclined plane fixed connection, the thickness of arc splint is crescent by stiff end to expansion end, clamping structure is still including the fastening nut of cover on locating all arc splint, fastening nut and the outer cambered surface threaded connection of arc splint.
After the positions of the supports are adjusted, the fastening nuts are rotated reversely, the arc-shaped clamping plates are loosened, the rectangular cushion blocks are used for adjusting the angles, then the adjusting nuts are rotated to enable the adjusting screws to move towards the corresponding floor slabs until the rectangular cushion blocks are attached to the corresponding floor slabs, the tops of the rectangular cushion blocks can be tightly attached to the floor slabs, the rectangular cushion blocks can be tightly attached to the floor slabs under the condition that the floor slabs are uneven or inclined, and the rectangular cushion blocks can enable acting forces to act on the floor slabs in a balanced mode; and the adjusting nut is rotated in the forward direction, the arc-shaped plate is extruded through the adjusting nut, and the arc-shaped clamping plate clamps the connecting ball, so that the rectangular cushion block is fixed, the rectangular cushion block is prevented from being deviated, and the rectangular cushion block plays a role in auxiliary support.
Furthermore, auxiliary supporting plates are fixedly connected to the upper cross beam and the lower cross beam, and the auxiliary supporting plates are detachably connected with the shear wall through bolts.
The connection stability between the upper cross beam, the lower cross beam and the shear wall is enhanced through the auxiliary supporting plates, and meanwhile, the stress balance of the upper cross beam and the lower cross beam can be balanced, so that the upper cross beam and the lower cross beam are prevented from being deformed.
A construction method of a underpinning structure of a shear wall structure comprises the following steps:
(1) and installing a underpinning structure: mounting underpinning structures on two sides of the shear wall according to design requirements, and reinforcing the connection stability between the upper cross beam, the lower cross beam and the shear wall through auxiliary supporting plates; adjusting the positions of the supports according to requirements, reversely rotating the fastening nuts, loosening the arc-shaped clamping plates to enable the rectangular cushion blocks to adjust the angles, and then rotating the adjusting nuts to enable the adjusting screws to move towards the corresponding floor slabs until the rectangular cushion blocks are attached to the corresponding floor slabs, so that the rectangular cushion blocks can be tightly attached to the floor slabs under the condition that the floor slabs are uneven; the adjusting nut is rotated in the forward direction, so that the arc-shaped clamping plate clamps the connecting ball, the rectangular cushion block is fixed, the rectangular cushion block is prevented from deviating, and the rectangular cushion block plays a role in auxiliary support;
(2) pre-jacking: electrifying the electromagnet, sucking the bolt into the connecting groove by the electromagnet, and unlocking the mounting seat and the adjusting cylinder; the mounting seat is driven to move by rotating the adjusting cylinder, the position of the hydraulic jacking device is adjusted by synchronously moving the mounting seats at the two ends of the hydraulic jacking device, the replacement area of the shear wall is exposed, the pouring operation of the replacement area is convenient, the electromagnet is powered off after the adjustment is finished, the bolt slides into the corresponding first limiting groove and the second limiting groove under the action of the reset spring, and the mounting seat and the adjusting cylinder are locked; acting on the upper cross beam and the lower cross beam through a hydraulic jacking device, so as to pre-jack the shear wall;
(3) removing and chiseling the shear wall: chiseling off the part of concrete needing to be replaced of the shear wall, wherein continuous steel bars need to be ensured in the process; after chiseling the concrete, chiseling a plurality of key grooves which are uniformly distributed on the inner wall of the shear wall; then, detecting the original steel bar, and determining whether the original steel bar needs to be maintained according to the detection result;
(4) and jacking the shear wall: jacking the shear wall at the top according to the specification of the area of the shear wall needing to be replaced and the concrete solidification deformation degree; the jacking angle is estimated according to the condition of the shear wall, the angle on the hydraulic jacking device is adjusted according to the jacking angle, and in the adjusting process, angle adjustment is sequentially carried out on a single hydraulic jacking device, so that the normal operation of the rest hydraulic jacking devices is ensured; when the jacking angle is adjusted, the electromagnet is electrified again, and the bolt is sucked into the connecting groove again by the electromagnet, so that the mounting seat and the adjusting cylinder are unlocked; the mounting seat at one end of the hydraulic jacking device is driven to move by rotating the adjusting cylinder or the moving directions of the mounting seats at the two ends of the hydraulic jacking device are different, so that the hydraulic jacking device is horizontally and transversely inclined, the electromagnet is powered off again, and the mounting seat and the adjusting cylinder are locked; in addition, the hydraulic jacking device is horizontally and longitudinally inclined by pushing the hydraulic cylinder to drive the connecting seat at one end of the hydraulic jacking device to move or the moving directions of the connecting seats at two ends of the hydraulic jacking device are different, so that the hydraulic jacking device is parallel to the jacking direction, and the purpose of adjusting the jacking angle is achieved;
(5) and prefabricating and replacing the wall body: prefabricating a prefabricated replacement wall body with the same specification in a factory according to the specification of an area of the shear wall needing to be replaced, reserving a reinforcing steel bar accommodating groove on the replacement wall body, and prefabricating the same key groove on the periphery of the replacement wall body except the bottom; connecting keys corresponding to the key slots on the inner wall of the bottom of the shear wall are prefabricated at the bottom of the replacement wall;
(6) and replacing the wall body for installation: lifting and mounting the replacement wall body on the shear wall, inserting the connecting key at the bottom of the replacement wall body into the corresponding key slot, and ensuring that the original steel bar is in the steel bar accommodating slot of the replacement wall body; erecting templates on the periphery of the shear wall, and pouring UHPC concrete into the joint surface of the replacement wall body and the shear wall and the reinforcing steel bar accommodating groove to ensure that the replacement wall body and the shear wall form stable connection;
(7) and concrete curing: when the other hydraulic jacking devices are ensured to be kept in jacking states, the position of a single hydraulic jacking device is adjusted, so that the hydraulic jacking device is arranged right opposite to the shear wall replacement area, the hydraulic jacking devices are reasonably distributed, and the deformation of the shear wall replacement area is prevented; meanwhile, the jacking angle and distance can be adjusted again according to the deformation trend of each part in the maintenance process, and the underpinning structure is dismantled until the maintenance is finished.
Additional advantages, objects, and features of the invention will be set forth in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a longitudinal cross-sectional view of an embodiment of the present invention;
FIG. 3 is an enlarged schematic view at A in FIG. 2;
fig. 4 is an installation diagram of a replacement wall according to an embodiment of the present invention.
The drawings are numbered as follows: the shear wall comprises a shear wall 1, an upper cross beam 2, a lower cross beam 3, a support plate 4, a groove 5, a mounting seat 6, a support screw 7, an adjusting cylinder 8, a bolt 9, an electromagnet 10, a return spring 11, a first limiting groove 12, a second limiting groove 13, a moving groove 14, a pushing hydraulic cylinder 15, a rectangular cushion block 16, a support seat 17, an adjusting screw 18, an adjusting nut 19, an arc-shaped clamping plate 20, a fastening nut 21, an auxiliary support plate 22, a floor slab 23, a hydraulic jacking device 24, a connecting ball 25, a connecting seat 26, a replacement wall body 27, a key groove 28, a connecting key 29, a reinforcing steel bar 30 and a reinforcing steel bar accommodating groove 31.
Detailed Description
As shown in FIGS. 1-4:
a shear wall 1 structure underpinning structure comprises underpinning structures arranged on two sides of a shear wall 1, wherein each underpinning structure comprises an upper cross beam 2 and a lower cross beam 3 which are symmetrically arranged, the upper cross beams 2 and the lower cross beams 3 are horizontally arranged, supporting plates 4 are detachably connected between the adjacent upper cross beams 2 and the adjacent lower cross beams 3 through bolts, and the supporting plates 4 horizontally penetrate through the shear wall 1; the opposite surfaces of the upper cross beam 2 and the lower cross beam 3 are provided with grooves 5; a plurality of hydraulic jacking devices 24 are vertically arranged between the upper cross beam 2 and the lower cross beam 3, mounting seats 6 are hinged to two ends of each hydraulic jacking device 24, the mounting seats 6 are connected into corresponding grooves 5 in a sliding mode, and locking devices are arranged between the mounting seats 6 and the grooves 5; and auxiliary supporting structures which are abutted against the wall feet of the shear wall 1 are arranged on the opposite end surfaces of the upper cross beam 2 and the lower cross beam 3.
In the scheme, the position of the hydraulic jacking device 24 can be adjusted through the movement of the mounting seat 6, so that the area to be replaced of the shear wall 1 can be exposed while the jacking force is exerted on the upper part and the lower part of the shear wall 1, the replacement of a wall body is facilitated, and the laying of a template in the pouring process is facilitated; after the wall body is replaced, the position of the hydraulic jacking device 24 can be adjusted again, so that the hydraulic jacking device 24 is uniformly distributed, the uniform stress of the shear wall 1 is ensured, and the deformation of a replacement area of the shear wall 1 is prevented.
In this embodiment, the locking device includes a supporting screw 7 horizontally fixed in the groove 5, the supporting screw 7 is parallel to the groove 5, a mounting hole coaxial with the supporting screw 7 is formed in a side wall of the mounting seat 6, an adjusting cylinder 8 in threaded connection with the supporting screw 7 is rotatably connected in the mounting hole, and a power device (a conventional technical means of a person skilled in the art, so that the power device is not shown in the drawing) for driving the adjusting cylinder 8 to rotate is arranged on the mounting seat 6; connecting grooves penetrating through the mounting base 6 are horizontally formed in two sides of the mounting hole, coaxial plugs 9 are connected to two ends of each connecting groove in a sliding mode, an electromagnet 10 is arranged in the middle of each connecting groove, and a return spring 11 is arranged between each electromagnet 10 and each plug 9; a plurality of equidistant first spacing grooves 12 have all been seted up to recess 5 both sides, a plurality of second spacing grooves 13 have been seted up to regulation section of thick bamboo 8 week side, first spacing groove 12 all is used for holding bolt 9 with second spacing groove 13.
Electrifying the electromagnet 10, sucking the plug pin 9 into the connecting groove by the electromagnet 10, and unlocking the mounting seat 6 and the adjusting cylinder 8; the mounting seat 6 is driven to move by rotating the adjusting cylinder 8, the position of the hydraulic jacking device 24 is adjusted by synchronously moving the mounting seats 6 at two ends of the hydraulic jacking device 24, the replacement area of the shear wall 1 is exposed, the pouring operation of the replacement area is convenient, the electromagnet 10 is powered off after the adjustment is finished, the bolt 9 slides into the corresponding first limiting groove 12 and the second limiting groove 13 under the action of the reset spring 11, and the mounting seats 6 and the adjusting cylinder 8 are locked; after the wall body 27 is replaced and installed, the position of the hydraulic jacking device 24 is adjusted again, so that the hydraulic jacking device 24 is reasonably distributed, the uniform stress of the shear wall 1 is guaranteed, and the deformation of a replacement area of the shear wall 1 is prevented.
Pre-estimating a jacking angle according to the condition of the shear wall 1, and adjusting the angle on the hydraulic jacking device 24 according to the jacking angle; when the jacking angle is adjusted, the electromagnet 10 is electrified again, the electromagnet 10 sucks the plug pin 9 into the connecting groove again, and therefore the mounting seat 6 and the adjusting cylinder 8 are unlocked; the adjusting cylinder 8 is rotated to drive the mounting seat 6 at one end of the hydraulic jacking device 24 to move or the mounting seats 6 at two ends of the hydraulic jacking device 24 are different in moving direction, so that the hydraulic jacking device 24 horizontally and transversely inclines, and the purpose of adjusting the horizontal and transverse angle of the hydraulic jacking device 24 is achieved.
In this embodiment, the opposite surfaces of the mounting seat 6 are horizontally provided with moving grooves 14 perpendicular to the shear wall 1, the moving grooves 14 are connected with connecting seats 26 in a sliding manner along the axial direction thereof, and two ends of the hydraulic jacking device 24 are respectively hinged with the mounting seat 6 by being connected with the corresponding connecting seats 26 in a spherical hinge manner; a pushing hydraulic cylinder 15 is arranged between one end of the connecting seat 26 and the moving groove 14.
Drive the horizontal longitudinal movement of connecting seat 26 of 24 one ends of hydraulic jacking device or make the connecting seat 26 moving direction at 24 both ends of hydraulic jacking device different through promoting pneumatic cylinder 15, make the horizontal longitudinal tilt of 24 horizontal longitudinal angle of hydraulic jacking device, reach the purpose of adjusting the horizontal longitudinal angle of 24 horizontal longitudinal angle of hydraulic jacking device, cooperation mount pad 6 is to the horizontal regulation of 24 levels of hydraulic jacking device, reach the purpose of all-round regulation jacking angle, make the regulation of jacking angle more accurate.
In this embodiment, the auxiliary supporting structure includes rectangular cushion block 16 and sets up the spout on the opposite terminal surface of entablature 2 and bottom end rail 3, equal sliding connection has support 17 in the spout, it has adjusting screw 18 to go up vertical sliding connection, rectangular cushion block 16 ball pivot is connected in adjusting screw 18 top, rotate on the support 17 and connect because adjusting screw 18 threaded connection's adjusting nut 19.
After the underpinning structure is installed, the positions of the support seats 17 are adjusted according to requirements, the fastening nuts 21 are rotated reversely until the rectangular cushion blocks 16 are attached to the corresponding floor slabs 23, partial acting force for jacking the shear wall 1 is distributed to the floor slabs 23, and the phenomenon that the shear wall 1 is deformed due to overlarge acting force in the jacking process is avoided, so that the normal shear-preventing function of the shear wall 1 is influenced.
In this embodiment, press from both sides the structure and include that circular array distributes the arc splint 20 in spherical cavity mouth department, the intrados of arc splint 20 and the laminating of connecting ball 25, the stiff end of arc splint 20 in 16 inclined planes fixed connection of rectangle cushion, the thickness of arc splint 20 is crescent by stiff end to expansion end, clamping structure still locates the fastening nut 21 on all arc splint 20 including the cover, fastening nut 21 and the extrados threaded connection of arc splint 20.
After the positions of the supports 17 are adjusted, the fastening nuts 21 are rotated reversely, the arc-shaped clamping plates 20 are loosened, the angle of the rectangular cushion blocks 16 is adjusted, then the adjusting screws 18 are moved towards the corresponding floor slabs 23 by rotating the adjusting nuts 19 until the rectangular cushion blocks 16 are attached to the corresponding floor slabs 23, the tops of the rectangular cushion blocks 16 can be tightly attached to the floor slabs 23, the rectangular cushion blocks 16 can be tightly attached to the floor slabs 23 under the condition that the floor slabs 23 are uneven or inclined, and the rectangular cushion blocks 16 can enable acting forces to act on the floor slabs 23 in a balanced manner; and the adjusting nut 19 is rotated in the forward direction, the arc-shaped plate is extruded through the adjusting nut 19, the arc-shaped clamping plate 20 clamps the connecting ball 25, so that the rectangular cushion block 16 is fixed, the rectangular cushion block 16 is prevented from being deviated, and the rectangular cushion block 16 plays a role of auxiliary support.
In this embodiment, the upper beam 2 and the lower beam 3 are both fixedly connected with an auxiliary supporting plate 22, and the auxiliary supporting plate 22 and the shear wall 1 are detachably connected through bolts.
The connection stability between the upper cross beam 2, the lower cross beam 3 and the shear wall 1 is enhanced through the auxiliary supporting plates 22, and meanwhile, the stress balance of the upper cross beam 2 and the lower cross beam 3 can be balanced, so that the upper cross beam 2 and the lower cross beam 3 are prevented from being deformed.
A construction method of a shear wall 1 structure underpinning structure comprises the following steps:
(1) and installing a underpinning structure: mounting underpinning structures on two sides of the shear wall 1 according to design requirements, and reinforcing the connection stability between the upper cross beam 2, the lower cross beam 3 and the shear wall 1 through auxiliary supporting plates 22; adjusting the positions of the supports 17 according to requirements, reversely rotating the fastening nuts 21, loosening the arc-shaped clamping plates 20 to enable the rectangular cushion blocks 16 to adjust the angles, and then rotating the adjusting nuts 19 to enable the adjusting screws 18 to move towards the corresponding floor slabs 23 until the rectangular cushion blocks 16 are attached to the corresponding floor slabs 23, so that the rectangular cushion blocks 16 can be tightly attached to the floor slabs 23 under the condition that the floor slabs 23 are uneven; the adjusting nut 19 is rotated forwards, so that the arc-shaped clamping plate 20 clamps the connecting ball 25, the rectangular cushion block 16 is fixed, the rectangular cushion block 16 is prevented from deviating, and the rectangular cushion block 16 plays a role in auxiliary support;
(2) pre-jacking: electrifying the electromagnet 10, sucking the plug pin 9 into the connecting groove by the electromagnet 10, and unlocking the mounting seat 6 and the adjusting cylinder 8; the mounting seat 6 is driven to move by rotating the adjusting cylinder 8, the position of the hydraulic jacking device 24 is adjusted by synchronously moving the mounting seats 6 at two ends of the hydraulic jacking device 24, the replacement area of the shear wall 1 is exposed, the pouring operation of the replacement area is convenient, the electromagnet 10 is powered off after the adjustment is finished, the bolt 9 slides into the corresponding first limiting groove 12 and the second limiting groove 13 under the action of the reset spring 11, and the mounting seats 6 and the adjusting cylinder 8 are locked; acting on the upper cross beam 2 and the lower cross beam 3 through a hydraulic jacking device 24, so as to pre-jack the shear wall 1;
(3) and chiseling the shear wall 1: chiseling off the part of concrete needing to be replaced of the shear wall 1, wherein the steel bars 30 need to be ensured to be continuous in the process; after the concrete is chiseled, chiseling a plurality of key slots 28 which are uniformly distributed on the inner wall of the shear wall 1; then, detecting the original reinforcing steel bar 30, and determining whether the original reinforcing steel bar 30 needs to be maintained or not according to the detection result;
(4) and jacking the shear wall 1: jacking the shear wall 1 at the top according to the specification of the area of the shear wall 1 to be replaced and the concrete solidification deformation degree; the jacking angle is estimated according to the condition of the shear wall 1, the angle on the hydraulic jacking device 24 is adjusted according to the jacking angle, and in the adjusting process, angle adjustment is sequentially carried out on a single hydraulic jacking device 24, so that the normal operation of the rest hydraulic jacking devices 24 is ensured; when the jacking angle is adjusted, the electromagnet 10 is electrified again, the electromagnet 10 sucks the plug pin 9 into the connecting groove again, and therefore the mounting seat 6 and the adjusting cylinder 8 are unlocked; the mounting seat 6 at one end of the hydraulic jacking device 24 is driven to move by rotating the adjusting cylinder 8 or the moving directions of the mounting seats 6 at two ends of the hydraulic jacking device 24 are different, so that the hydraulic jacking device 24 horizontally and transversely inclines, the electromagnet 10 is powered off again, and the mounting seat 6 and the adjusting cylinder 8 are locked; in addition, the hydraulic jacking device 24 is horizontally and longitudinally inclined by pushing the hydraulic cylinder 15 to drive the connecting seat 26 at one end of the hydraulic jacking device 24 to move or the moving directions of the connecting seats 26 at two ends of the hydraulic jacking device 24 are different, so that the hydraulic jacking device 24 is parallel to the jacking direction, and the purpose of adjusting the jacking angle is achieved;
(5) and the prefabricated wall body 27 is replaced: prefabricating a prefabricated replacement wall body 27 with the same specification in a factory according to the specification of an area needing to be replaced of the shear wall 1, reserving a reinforcing steel bar accommodating groove 31 on the replacement wall body 27, and prefabricating the same key groove 28 on the peripheral side of the replacement wall body 27 except the bottom; the bottom of the replacement wall body 27 is prefabricated with a connecting key 29 corresponding to the key slot 28 on the inner wall of the bottom of the shear wall 1;
(6) and replacing the wall body 27 for installation: lifting and installing the replacement wall body 27 on the shear wall 1, inserting the connecting key 29 at the bottom of the replacement wall body 27 into the corresponding key slot 28, and ensuring that the original reinforcing steel bar 30 is positioned in the reinforcing steel bar accommodating slot 31 of the replacement wall body 27; erecting a template on the peripheral side of the shear wall 1, and pouring UHPC concrete into the joint surface of the replacement wall body 27 and the shear wall 1 and the steel bar accommodating groove 31 to ensure that the replacement wall body 27 and the shear wall 1 are stably connected;
(7) and concrete curing: when the other hydraulic jacking devices 24 are ensured to be kept in jacking states, the position of a single hydraulic jacking device 24 is adjusted, so that the hydraulic jacking device 24 is opposite to the replacement area of the shear wall 1, the hydraulic jacking devices 24 are reasonably distributed, and the replacement area of the shear wall 1 is prevented from deforming; meanwhile, the jacking angle and distance can be adjusted again according to the deformation trend of each part in the maintenance process, and the underpinning structure is dismantled until the maintenance is finished.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides a shear force wall structure underpins structure which characterized in that: the underpinning structure comprises an upper cross beam and a lower cross beam, and supporting plates horizontally penetrating through the shear wall are fixed between the adjacent upper cross beams and the adjacent lower cross beams; grooves are formed in the opposite surfaces of the upper cross beam and the lower cross beam; a plurality of hydraulic jacking devices are vertically arranged between the upper cross beam and the lower cross beam, mounting seats are hinged to two ends of each hydraulic jacking device, the mounting seats are connected into corresponding grooves in a sliding mode, and locking devices are arranged between the mounting seats and the grooves; and auxiliary supporting structures which are abutted against the wall feet of the shear wall are arranged on the opposite end surfaces of the upper cross beam and the lower cross beam.
2. The underpinning structure of shear wall structure as claimed in claim 1, wherein: the locking device comprises a supporting screw rod horizontally fixed in the groove, the supporting screw rod is parallel to the groove, a mounting hole coaxial with the supporting screw rod is formed in the side wall of the mounting seat, an adjusting cylinder in threaded connection with the supporting screw rod is rotatably connected in the mounting hole, and power equipment for driving the adjusting cylinder to rotate is arranged on the mounting seat; connecting grooves penetrating through the mounting seat are horizontally formed in two sides of the mounting hole, coaxial bolts are connected to two ends of each connecting groove in a sliding mode, an electromagnet is arranged in the middle of each connecting groove, and a return spring is arranged between each electromagnet and each bolt; a plurality of equidistant first spacing grooves are formed in the two sides of the groove, a plurality of second spacing grooves are formed in the periphery of the adjusting cylinder, and the first spacing grooves and the second spacing grooves are used for accommodating bolts.
3. A shear wall structure underpin structure according to claim 2, wherein: moving grooves perpendicular to the shear wall are horizontally formed in the opposite surfaces of the mounting seat, connecting seats are connected in the moving grooves in a sliding mode along the axial direction of the moving grooves, and two ends of the hydraulic jacking device are hinged to the mounting seat through spherical hinges connected with the corresponding connecting seats respectively; and a pushing hydraulic cylinder is arranged between one end of the connecting seat and the moving groove.
4. A shear wall structure underpin structure according to claim 3, wherein: the auxiliary supporting structure comprises a rectangular cushion block and a sliding groove formed in the opposite end faces of the upper cross beam and the lower cross beam, a support is connected to the sliding groove in a sliding mode, an adjusting screw rod is connected to the upper vertical sliding mode, the rectangular cushion block is connected to the top end of the adjusting screw rod in a spherical hinge mode, and an adjusting nut connected with the support through threads is connected to the support in a rotating mode.
5. The underpinning structure of shear wall structure as claimed in claim 4, wherein: the clamping structure comprises arc-shaped clamping plates distributed at the positions of the spherical cavity openings in a circular array mode, the inner arc surfaces of the arc-shaped clamping plates are attached to connecting balls, the fixed ends of the arc-shaped clamping plates are fixedly connected to the inclined surfaces of the rectangular cushion blocks, the thicknesses of the arc-shaped clamping plates are gradually increased from the fixed ends to the movable ends, the clamping structure further comprises fastening nuts sleeved on all the arc-shaped clamping plates, and the fastening nuts are in threaded connection with the outer arc surfaces of the arc-shaped clamping plates.
6. The underpinning structure of shear wall structure as claimed in claim 5, wherein: and the upper cross beam and the lower cross beam are both fixedly connected with auxiliary supporting plates, and the auxiliary supporting plates are detachably connected with the shear wall through bolts.
7. The construction method of the underpinning structure of the shear wall structure as claimed in claim 6, wherein the construction method comprises the following steps: the method comprises the following steps:
(1) and installing a underpinning structure: mounting underpinning structures on two sides of the shear wall according to design requirements, and reinforcing the connection stability between the upper cross beam, the lower cross beam and the shear wall through auxiliary supporting plates; adjusting the positions of the supports according to requirements, reversely rotating the fastening nuts, loosening the arc-shaped clamping plates to enable the rectangular cushion blocks to adjust the angles, and then rotating the adjusting nuts to enable the adjusting screws to move towards the corresponding floor slabs until the rectangular cushion blocks are attached to the corresponding floor slabs, so that the rectangular cushion blocks can be tightly attached to the floor slabs under the condition that the floor slabs are uneven; the adjusting nut is rotated in the forward direction, so that the arc-shaped clamping plate clamps the connecting ball, the rectangular cushion block is fixed, the rectangular cushion block is prevented from deviating, and the rectangular cushion block plays a role in auxiliary support;
(2) pre-jacking: electrifying the electromagnet, sucking the bolt into the connecting groove by the electromagnet, and unlocking the mounting seat and the adjusting cylinder; the mounting seat is driven to move by rotating the adjusting cylinder, the position of the hydraulic jacking device is adjusted by synchronously moving the mounting seats at the two ends of the hydraulic jacking device, the replacement area of the shear wall is exposed, the pouring operation of the replacement area is convenient, the electromagnet is powered off after the adjustment is finished, the bolt slides into the corresponding first limiting groove and the second limiting groove under the action of the reset spring, and the mounting seat and the adjusting cylinder are locked; acting on the upper cross beam and the lower cross beam through a hydraulic jacking device, so as to pre-jack the shear wall;
(3) removing and chiseling the shear wall: chiseling off the part of concrete needing to be replaced of the shear wall, wherein continuous steel bars need to be ensured in the process; after chiseling the concrete, chiseling a plurality of key grooves which are uniformly distributed on the inner wall of the shear wall; then, detecting the original steel bar, and determining whether the original steel bar needs to be maintained according to the detection result;
(4) and jacking the shear wall: jacking the shear wall at the top according to the specification of the area of the shear wall needing to be replaced and the concrete solidification deformation degree; the jacking angle is estimated according to the condition of the shear wall, the angle on the hydraulic jacking device is adjusted according to the jacking angle, and in the adjusting process, angle adjustment is sequentially carried out on a single hydraulic jacking device, so that the normal operation of the rest hydraulic jacking devices is ensured; when the jacking angle is adjusted, the electromagnet is electrified again, and the bolt is sucked into the connecting groove again by the electromagnet, so that the mounting seat and the adjusting cylinder are unlocked; the mounting seat at one end of the hydraulic jacking device is driven to move by rotating the adjusting cylinder or the moving directions of the mounting seats at the two ends of the hydraulic jacking device are different, so that the hydraulic jacking device is horizontally and transversely inclined, the electromagnet is powered off again, and the mounting seat and the adjusting cylinder are locked; in addition, the hydraulic jacking device is horizontally and longitudinally inclined by pushing the hydraulic cylinder to drive the connecting seat at one end of the hydraulic jacking device to move or the moving directions of the connecting seats at two ends of the hydraulic jacking device are different, so that the hydraulic jacking device is parallel to the jacking direction, and the purpose of adjusting the jacking angle is achieved;
(5) and prefabricating and replacing the wall body: prefabricating a prefabricated replacement wall body with the same specification in a factory according to the specification of an area of the shear wall needing to be replaced, reserving a reinforcing steel bar accommodating groove on the replacement wall body, and prefabricating the same key groove on the periphery of the replacement wall body except the bottom; connecting keys corresponding to the key slots on the inner wall of the bottom of the shear wall are prefabricated at the bottom of the replacement wall;
(6) and replacing the wall body for installation: lifting and mounting the replacement wall body on the shear wall, inserting the connecting key at the bottom of the replacement wall body into the corresponding key slot, and ensuring that the original steel bar is in the steel bar accommodating slot of the replacement wall body; erecting templates on the periphery of the shear wall, and pouring UHPC concrete into the joint surface of the replacement wall body and the shear wall and the reinforcing steel bar accommodating groove to ensure that the replacement wall body and the shear wall form stable connection;
(7) and concrete curing: when the other hydraulic jacking devices are ensured to be kept in jacking states, the position of a single hydraulic jacking device is adjusted, so that the hydraulic jacking device is arranged right opposite to the shear wall replacement area, the hydraulic jacking devices are reasonably distributed, the shear wall is uniformly stressed, and the deformation of the shear wall replacement area is prevented; meanwhile, the jacking angle and distance can be adjusted again according to the deformation trend of each part in the maintenance process, and the underpinning structure is dismantled until the maintenance is finished.
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