CN109184259B

CN109184259B - Sliding construction technology for building

Info

Publication number: CN109184259B
Application number: CN201811322904.0A
Authority: CN
Inventors: 朱奎
Original assignee: Individual
Current assignee: Ningxia Kunsheng Construction Engineering Co ltd
Priority date: 2017-07-12
Filing date: 2017-07-12
Publication date: 2021-06-29
Anticipated expiration: 2037-07-12
Also published as: CN109184261A; CN109184256B; CN109184259A; CN109184261B; CN109184260B; CN109184256A; CN109184257A; CN107227862A; CN107227862B; CN109184258A; CN109184260A

Abstract

The invention discloses a sliding construction method for a building, which is characterized in that the construction steps include: (1) cutting out 1/5 of the cross-section of a frame column as a connection part with the sliding beam; (2) cutting the part of the sliding beam part Chisel out the brick wall and set up the formwork; (3) Support the sliding beam steel bar; (4) Pour the sliding beam concrete; (5) Use the wind cutter to cut off the connecting steel bar between the frame column and the raft and break the concrete of the connecting part ; (6) Connect the pre-embedded screws of the wooden tension beam and the sliding beam; (7) Pouring a new foundation for the position of the sliding beam; (8) Embed the traction steel lifting ring on the raft towards the pulling direction, and the construction reaction force Pile, install reaction force facilities and jacks; (9) Lay sliding rails in the sliding direction, and also lay sliding rails on the new foundation; (10) Use traction facilities for traction; (11) Connect the sliding beams to the new foundation Connections, frame columns and new foundations are connected.

Description

Sliding construction technology for building

Technical Field

The invention relates to sliding construction, in particular to a sliding construction method of a building.

Background

As city construction is being conducted vigorously, since urban planning and town road construction require removal of buildings, demolition of buildings directly causes a large amount of construction waste, and causes pollution. Especially the historical protection of buildings in normal use, it would be a significant loss to remove them. For some buildings with complete structures and still having use values, secondary repeated design and construction are avoided by adopting a building sliding technology, the buildings can be immediately put into use after sliding in place, and obvious economic and social benefits are obviously achieved. However, how to ensure the safety of the building in the sliding process, how to make the connection between the building and a new foundation, and how to reduce the cost on the premise of ensuring the safety.

Disclosure of Invention

The invention provides a sliding construction method of a building, which solves the problems of unsafe sliding construction and high cost of the building.

The upper surface of the raft is provided with the sliding beams, the distance between every two adjacent sliding beams is 3-3.6 m, the distance between the bottom of each sliding beam and the top of the raft is 60-80 mm, the height of each sliding beam is determined according to the upper load, and when the number of building layers is 5, the height of each sliding beam is 800 mm; when the number of the building layers is 4, the height of the sliding beam is 750 mm; when the number of the building layers is 3, the height of the sliding beam is 700 mm; when the number of the building layers is 2, the height of the sliding beam is 650 mm; when the number of the building layers is 1, the height of the sliding beam is 600 mm.

The width of the sliding beam is 300 mm. And a steel ball is arranged below the sliding beam, and the diameter of the steel ball is 60-80 mm.

In order to avoid local damage of the sliding beams in the sliding process, a wood tie beam is arranged between every two adjacent sliding beams to increase the overall rigidity, the diameter of each wood tie beam is 150-180 mm, and the included angle between each wood tie beam and each sliding beam is 45-60 degrees.

The right side of the position where the traction building is in place is provided with a reaction pile as a reaction facility, the distance between the reaction pile and the position where the traction building is in place is 0.6-0.8 m so as to provide an operation space, the reaction pile adopts a precast tubular pile, and the diameter of the precast tubular pile is 500-600 mm. The initial friction force of the counter-force pile is much larger than that of the counter-force pile during traction movement when the building is dragged, according to a large number of detection results, the initial friction force coefficient of the counter-force pile during traction movement is 0.15-0.2, the dynamic friction coefficient of the counter-force pile during traction movement is 0.017-0.025, in order to save cost, the counter-force pile and the engineering pile are jointly used as a counter-force support during initial traction movement, and only the counter-force pile is used as the counter-force support during traction movement.

The building can vibrate to a certain extent in the walking process, and if the surrounding environment has high requirements on vibration reduction, the purpose of vibration reduction can be achieved by taking technical measures. The damping steel blocks are arranged at intervals of 2-3 m at the lower part of the sliding rail, springs are installed in the damping steel blocks, the sliding rail is enabled to be the same as a spring body, when steel balls located in the range of the sliding rail body meet advancing resistance, impact force can be relieved under the action of the springs in the damping steel blocks, vibration energy is directly attracted by the springs in the damping steel blocks, and the steel balls meeting the resistance are prevented from bearing overlarge pressure and impact force.

The construction steps comprise:

(1) in order to integrate the sliding beam with the frame column, the section of the frame column 1/5 is chiseled out as a connecting part with the sliding beam; temporary supports are provided adjacent the frame posts.

(2) Chiseling off the brick wall at the position of the sliding beam, erecting a template, arranging a pouring hole and a tamping hole at the upper part of the lateral template, wherein the diameter of the pouring hole is 40-50 mm, and the arrangement interval of the pouring holes is 1.2-1.5 m; the diameter of each vibrating hole is 20-30 mm, and the distance between every two vibrating holes is 0.7-0.9 m; placing the steel ball bottom the template when setting up the template, steel ball embedding lower bolster, steel ball top is the same with lower bolster top elevation, has the bearing in the middle of the steel ball, and the bearing stretches into the template, and the bearing stretches into length and is 120 ~ 150 mm.

(3) And erecting a sliding beam reinforcing steel bar, wherein a main rib of the sliding beam extends into the chiseling part of the frame column and is bent upwards or downwards to increase the anchoring length, and the anchoring length is 500-700 mm.

(4) And pouring concrete of the sliding beam, then pouring concrete at chiseling-out parts of the frame columns, and pouring the concrete by adopting a high-pressure pump.

(5) And after the concrete strength of the sliding beam reaches the designed strength, cutting off the connecting reinforcing steel bars of the frame column and the raft and breaking off the concrete of the connecting part by using a wind cutting machine, so that the elevation of the bottom of the frame column is the same as the elevation of the bottom of the sliding beam.

(6) And connecting the wood tie beam with the embedded screws of the sliding beam.

(7) And pouring a new foundation of the in-place part of the sliding beam.

(8) And embedding a traction steel hanging ring in the raft towards the traction direction, constructing a counter-force pile, and installing a counter-force facility and a jack.

(9) And laying a slipping rail in the slipping direction, and laying the slipping rail on the new foundation.

(10) Traction is carried out by adopting a traction facility.

The traction facility adopts an automatic control hydraulic synchronous system, the automatic control hydraulic synchronous system consists of a hydraulic system, a detection sensor and a computer control system, wherein the hydraulic system comprises an oil pump and a hydraulic jack. The hydraulic system is controlled by a computer, fully automatically completes synchronous displacement, and realizes the functions of force and displacement control, operation locking and process display. The working pressure of the hydraulic system is 30-32 MPa, and the peak pressure is 35 MPa. The pushing stroke of the pushing cylinders is 1200mm, the pushing control speed is 0-60 mm/min, the pushing cylinders in the group are communicated in pressure, the positions of the groups are synchronously controlled, and the synchronous precision is +/-lmm.

(11) And connecting the sliding beam with the new foundation and connecting the frame column with the new foundation.

After the sliding beam is in place, two treatment modes can be provided, namely, the steel ball is cut by wind after the sliding beam is jacked, the sliding rail is removed, and then the sliding beam is lowered to connect the sliding beam with a new foundation. The risk of this process is that local structural damage is likely to occur due to uneven handling during the jacking of the skidding beam.

If the building structure performance is not good, the sliding rail is welded with the new foundation steel bar, and the steel ball is firmly welded with the sliding rail after the sliding rail slides in place, so that the steel ball cannot roll and translate under the action of external load later. And (3) pouring and compacting the gap between the sliding rail and the steel ball by using high-strength micro-expansion fine stone concrete, and pouring the steel ball into the high-strength micro-expansion fine stone concrete. By adopting the measures, the reliable connection of the upper structure and the new foundation is ensured, and when the sliding rail is subjected to the action of strong earthquake load, the post-cast filling fine aggregate concrete of the sliding rail and the steel ball are subjected to mutual friction extrusion deformation, so that partial earthquake energy can be absorbed, the action of the earthquake on the upper structure is reduced, and a certain earthquake isolation effect can be realized.

The frame column is connected with the new foundation by adopting fine aggregate concrete grouting, and the grouting process ensures that the vertical displacement of the column is zero after the column is in place and connected. The pulp squeezing adopts dry and hard fine stone concrete, and the dry and hard degree is qualified by being kneaded into a ball by hand and scattered when falling to the ground. And during the squeezing, two opposite side surfaces of the frame column are clamped tightly by a mold clamp, and the hard concrete is squeezed into the frame column from the other two surfaces.

The invention has good safety performance and low construction cost.

Drawings

Fig. 1, a schematic diagram of a sliding structure, fig. 2, a schematic diagram of a template support, fig. 3, a schematic diagram of a sliding plane, and fig. 4, a schematic diagram of a vibration reduction steel block.

In the drawings: 1. the device comprises a sliding beam, 2 frame columns, 3 raft plates, 4 steel balls, 5 sliding beam main ribs, 6 templates, 7 wood tie beams, 8 damping steel blocks, 9 springs.

Detailed Description

Example one

In the embodiment, the sliding beams 1 are arranged on the raft 3, the distance between every two adjacent sliding beams 1 is 3.2m, the distance between the bottom of each sliding beam 1 and the top of the raft 3 is 70mm, and the height of each sliding beam 1 is 750 mm. The width of the sliding beam 1 is 300 mm. And a steel ball 4 is arranged below the sliding beam 1, and the diameter of the steel ball 4 is 70 mm.

And a wood tie beam 7 is arranged between the adjacent sliding beams 1, the diameter of the wood tie beam 7 is 160mm, and the included angle between the wood tie beam 7 and the sliding beam 1 is 60 degrees.

The right side of the position of the traction building in place is provided with a reaction pile as a reaction facility, the distance between the reaction pile and the position of the traction building in place is 0.7m, the reaction pile is a prefabricated pipe pile, and the diameter of the prefabricated pipe pile is 500 mm. The combined reaction pile and engineering pile are used as reaction support during initial traction, and the reaction pile is only used as reaction support during traction movement.

Damping steel blocks 8 are arranged at intervals of 2-3 m at the lower part of the sliding rail, springs 9 are arranged in the damping steel blocks 8, the sliding rail is made to be like a spring body, and when the steel balls 4 located in the range of the sliding rail body meet advancing resistance, impact force can be relieved under the action of the springs 9 in the damping steel blocks 8.

The construction steps comprise:

(1) chiseling the section of the frame column 1/5 to be used as a connecting part with the sliding beam 1; temporary supports are provided near the frame posts 2.

(2) Chiseling off the brick wall at the position of the sliding beam 1, supporting a template 6, arranging pouring holes and vibrating holes at the upper part of the lateral template 6, wherein the diameter of each pouring hole is 40mm, and the arrangement interval of the pouring holes is 1.3 m; the diameter of each vibrating hole is 25mm, and the distance between every two vibrating holes is 0.8 m; when erecting template 6, place steel ball 4 in 6 bottoms of template, steel ball 4 embedding lower bolster 6, steel ball 4 tops are the same with 6 top elevations of lower bolster, have the bearing in the middle of the steel ball 4, and the bearing stretches into template 6, and the bearing stretches into length and is 130 mm.

(3) The steel bar of the sliding beam 1 is erected, the main steel bar 5 of the sliding beam extends into the chiseled part of the frame column 2 and is bent upwards or downwards to increase the anchoring length, and the anchoring length is 600 mm.

(4) And pouring concrete of the sliding beam 1, then pouring concrete of chiseling parts of the frame columns 2, and pouring the concrete by adopting a high-pressure pump.

(5) And after the concrete strength of the sliding beam 1 reaches the designed strength, cutting off the connecting reinforcing steel bars of the frame column 2 and the raft 3 and the concrete of the connecting part by using a wind cutting machine, so that the bottom elevation of the frame column 2 is the same as the bottom elevation of the sliding beam 1.

(6) And connecting the wood tie beam 7 with the embedded screws of the sliding beam 1.

(7) And pouring a new foundation of the in-place part of the sliding beam 1.

(8) And embedding a traction steel hanging ring in the raft 3 towards the traction direction, constructing a counter-force pile, and installing a counter-force facility and a jack.

(10) Traction is carried out by adopting a traction facility.

(11) And connecting the sliding beam 1 with the new foundation, and connecting the frame column 2 with the new foundation.

And after the sliding beam 1 is slid in place, the sliding beam 1 is jacked, the steel ball 4 is cut by wind after the sliding beam 1 is jacked, the sliding rail is removed, and then the sliding beam 1 is lowered to connect the sliding beam 1 with a new foundation.

The frame column 2 is connected with the new foundation by adopting fine aggregate concrete pulp extrusion, and the pulp extrusion process ensures that the vertical displacement of the column is zero after the column is in place and connected. The pulp squeezing adopts dry and hard fine stone concrete, and the dry and hard degree is qualified by being kneaded into a ball by hand and scattered when falling to the ground. When in pulp extrusion, two opposite side surfaces of the frame column 2 are clamped tightly by a mould clamp, and hard concrete is extruded from the other two surfaces.

Example two

In the embodiment, the sliding beams 1 are arranged on the raft 3, the distance between every two adjacent sliding beams 1 is 3.2m, the distance between the bottom of each sliding beam 1 and the top of the raft 3 is 70mm, and the height of each sliding beam 1 is 700 mm; the width of the sliding beam 1 is 300 mm. And a steel ball 4 is arranged below the sliding beam 1, and the diameter of the steel ball 4 is 70 mm.

A wood tie beam 7 is arranged between the adjacent sliding beams 1, the diameter of the wood tie beam 7 is 150-180 mm, and the included angle between the wood tie beam 7 and the sliding beam 1 is 50 degrees.

The right side of the position of taking one's place of the traction building is provided with a counterforce pile as a counterforce facility, the distance between the counterforce pile and the position of taking one's place of the building is 0.7m, the counterforce pile is a prefabricated tubular pile, and the diameter of the prefabricated tubular pile is 500-600 mm. The combined reaction pile and engineering pile are used as reaction support during initial traction, and the reaction pile is only used as reaction support during traction movement.

The construction steps comprise:

(2) Chiseling off the brick wall at the position of the sliding beam 1, supporting a template 6, arranging pouring holes and vibrating holes at the upper part of the lateral template 6, wherein the diameter of each pouring hole is 45mm, and the arrangement interval of the pouring holes is 1.3 m; the diameter of each vibrating hole is 25mm, and the distance between every two vibrating holes is 0.8 m; when erecting template 6, place steel ball 4 in 6 bottoms of template, steel ball 4 embedding lower bolster 6, steel ball 4 tops are the same with 6 top elevations of lower bolster, have the bearing in the middle of the steel ball 4, and the bearing stretches into template 6, and the bearing stretches into length and is 130 mm.

(3) The steel bars of the sliding beam 1 are erected, the main steel bars 5 of the sliding beam extend into the chiseling part of the frame column 2 and are bent upwards or downwards to increase the anchoring length, and the anchoring length is 500 mm.

(7) And pouring a new foundation of the in-place part of the sliding beam 1.

(10) Traction is carried out by adopting a traction facility.

And (3) welding the sliding rail with the new foundation steel bar, and firmly welding the steel ball 4 with the sliding rail after the sliding rail slides in place, so that the steel ball 4 cannot roll and translate under the action of an external load later. And (3) pouring and compacting the gap between the sliding rail and the steel ball 4 by using high-strength micro-expansion fine stone concrete, and pouring the steel ball 4 into the high-strength micro-expansion fine stone concrete.

Claims

1. the sliding construction method of a building, it is characterized in that sliding beam is arranged on the raft, the adjacent sliding beam distance is 3～3.6m, and the distance at the bottom of the sliding beam and the top of the raft is 60～80mm, The width of the sliding beam is 300mm; steel balls are arranged under the sliding beam, and the diameter of the steel balls is 60-80mm;

A wooden tie beam is arranged between adjacent sliding beams, the diameter of the wooden tie beam is 150-180mm, and the angle between the wooden tie beam and the sliding beam is 45-60 degrees;

Construction steps include:

(1) Cut out 1/5 of the section of the frame column as the connection part with the sliding beam; set up temporary support near the frame column;

(2) Chisel away the brick wall at the position of the sliding beam, set up a formwork, and set a perfusion hole and a vibration hole on the upper part of the lateral formwork. The diameter of the perfusion hole is 40-50mm, and the spacing between the perfusion holes is 1.2-1.5m; The diameter of the holes is 20-30mm, and the spacing of the vibration holes is 0.7-0.9m; when the formwork is supported, place steel balls on the lower formwork, the steel balls are embedded in the lower formwork, the top of the steel balls is the same as the top of the lower formwork, and there are bearings in the middle of the steel ball , the bearing extends into the template, and the bearing length is 120 ~ 150mm;

(3) The sliding beam reinforcement is supported, and the chiseled part of the sliding beam main reinforcement extending into the frame column is bent upwards or downwards to increase the anchorage length, and the anchorage length is 500-700mm;

(4) pouring the slip beam concrete, and then pouring the frame column chiseled concrete, and the concrete is poured with a high-pressure pump;

(5) After the concrete strength of the sliding beam reaches the design strength, use the wind cutting machine to cut off the connecting steel bars of the frame column and the raft and break the concrete of the connecting part, so that the bottom elevation of the frame column is the same as that of the bottom of the sliding beam;

(6) Connect the pre-embedded screws of the wooden tension beam and the sliding beam;

(7) Pouring a new foundation for the position of the slip beam;

(8) Bury traction steel rings on the raft towards the pulling direction, construct reaction force piles, install reaction force facilities and jacks;

(9) The sliding rails are laid in the sliding direction, and the sliding rails are also laid on the new foundation;

(10) Use traction facilities for traction;

The traction facility adopts an automatic control hydraulic synchronization system. The automatic control hydraulic synchronization system consists of a hydraulic system, a detection sensor and a computer control system. The hydraulic system includes an oil pump and a hydraulic jack; Displacement control, operation locking, and process display functions; the working pressure of the hydraulic system is 30-32MPa, and the peak pressure is 35MPa; the thrust stroke of the jacking cylinder is 1200mm, the jacking control speed is 0-60mm/min, and the pressure of each jacking cylinder in the group is connected , the position synchronization control between groups, the synchronization accuracy is ±lmm;

(11) Connect the sliding beam with the new foundation, and connect the frame column with the new foundation;

A reaction force pile is set on the right side of the in-position position of the traction building as a reaction force facility. The distance between the reaction force pile and the in-position position of the building is 0.6~0.8m. The reaction force pile adopts a prefabricated pipe pile with a diameter of 500~ 600mm; in the initial traction, the combination of the reaction pile and the engineering pile is used as the reaction support, and only the reaction pile is used as the reaction support during the traction movement;

Vibration-damping steel blocks are installed at intervals of 2 to 3m at the lower part of the sliding rail, and springs are installed in the vibration-damping steel blocks.