CN112696050A - Frame building jacking device, integral jacking method and jacking deviation rectifying method - Google Patents
Frame building jacking device, integral jacking method and jacking deviation rectifying method Download PDFInfo
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- CN112696050A CN112696050A CN202011547937.2A CN202011547937A CN112696050A CN 112696050 A CN112696050 A CN 112696050A CN 202011547937 A CN202011547937 A CN 202011547937A CN 112696050 A CN112696050 A CN 112696050A
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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
- E04G23/06—Separating, lifting, removing of buildings; Making a new sub-structure
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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
- E04G23/06—Separating, lifting, removing of buildings; Making a new sub-structure
- E04G23/065—Lifting of buildings
Abstract
The invention discloses a frame building jacking device, an integral jacking method and a jacking deviation rectifying method, which comprise a jack, a screw rod, a threaded sleeve, an upper limiting nut and a lower bearing nut; 2 or 4 brackets are symmetrically distributed at the bottom of the side wall of each frame column, and 1-2 threaded steel pipes are pre-embedded in each bracket; the jack is placed on the ground beam right below the center of the frame column; the bottom end of each screw rod is embedded in the ground beam, the top end of each screw rod penetrates through the corresponding threaded steel pipe to form a penetrating end, and the maximum length of each penetrating end is not less than the jacking height of the frame building; the thread fit clearance between the screw and the inner wall surface of the threaded steel pipe is not more than 1 mm; every screw rod in every bracket below all overlaps and is equipped with at least one pressure-bearing nut down, all overlaps at every screw rod periphery in every bracket top and is equipped with last spacing nut. The invention can reduce the using number of the jacks, greatly reduce the using number of the cushion blocks and accelerate the construction speed. Meanwhile, in the jacking process, the verticality precision is high, and the inclination can be prevented.
Description
Technical Field
The invention relates to the field of building jacking, in particular to a frame building jacking device, an integral jacking method and a jacking deviation rectifying method.
Background
Because the floor height of the building can not meet the use requirement, the outdoor ground is greatly increased due to city construction, the elevation of the indoor terrace is far lower than the height of the outdoor ground, and the like, the building must be lifted to meet the use requirement. In addition, when the building inclines, the building needs to be jacked to realize deviation rectification.
When the traditional lifting construction method is adopted for building lifting construction, the following problems often exist:
(1) in the traditional lifting device and method, each frame column needs a plurality of jacks in the lifting construction process, so that the use amount of the jacks is increased, and the input cost is greatly increased. In addition, when one jack in a certain frame column has a fault, the group of jacks needs to be completely replaced and checked one by one, and then a large number of spare jacks need to be prepared, so that the cost investment is further increased.
(2) The traditional lifting device and method adopt the cushion block as a lifting support, and when the lifting height is higher, the support erected by the cushion block is higher, and then the stability is poor, and the lifting device is unsafe. In addition, when the building layer is lifted, the lifting time is long, when a support built by cushion blocks is adopted, and the like, and when the support is in severe weather (such as rainy season) or severe environment (such as slight earthquake) and the like, the verticality precision is greatly reduced by frame loading, and the inclination can be seriously caused.
(3) When a cushion block is added in the lifting construction process of the traditional lifting device and method, a jack needs to be arranged for many times, and the construction operation difficulty is high.
(4) The traditional lifting construction method is slow in construction speed and long in period.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art and provides a frame building jacking device, an integral jacking method and a jacking deviation rectifying method. Meanwhile, in the jacking process, the verticality precision is high, and the inclination can be prevented.
In order to solve the technical problems, the invention adopts the technical scheme that:
a frame building jacking device comprises a jack, a screw rod, a threaded sleeve, an upper limiting nut and a lower pressure-bearing nut.
The frame building comprises a plurality of frame columns and ground beams.
2 or 4 brackets are symmetrically arranged at the bottom of the side wall of each frame column, 1-2 threaded steel pipes are embedded in each bracket, and each threaded steel pipe is arranged along the vertical direction.
The jack is placed on the ground beam under the center of each frame column, and a jack cushion block is arranged between the jack and the ground beam.
The number of the screw rods is equal to that of the threaded steel pipes, all the screw rods are vertically arranged and are symmetrical about the jack.
The bottom of each screw rod is pre-buried in the grade beam, and the top of each screw rod all passes from corresponding threaded steel pipe to form the end of wearing out.
The maximum length of the penetrating end is not less than the jacking height of the frame building.
The screw rod is in threaded fit with the inner wall surface of the threaded steel pipe, and the thread fit clearance is not more than 1 mm.
Every screw rod periphery below every bracket all overlaps and is equipped with at least one pressure-bearing nut down, all overlaps at every screw rod periphery of every bracket top and is equipped with last spacing nut.
And two lower pressure-bearing nuts are sleeved on the periphery of each screw rod below each bracket.
A support is sleeved on the periphery of each screw rod positioned at the top of the ground beam, and the bottom of each support is fixedly connected with the ground beam.
2 brackets are symmetrically arranged at the bottom of the side wall of each frame column, and 1-4 threaded steel pipes are embedded in each bracket.
And threaded base plates are arranged between the upper limiting nut and the corresponding bracket and between the lower bearing nut and the corresponding bracket.
A method for integrally jacking a frame building comprises the following steps.
Step 1, laying a bracket and a threaded steel pipe, and specifically comprising the following steps:
P＝A×f (1)
in the formula (1), A is the cross-sectional area of the threaded steel pipe. f is the compressive strength value of each screw.
n0＝(D+L)/ηP (2)
in the formula (2), D is the transverse load of the corresponding frame column, and L is the live load of the corresponding frame column. Eta is the reduction coefficient.
Step 13, calculating the actual number n of the screws: the actual number n of the screw rods is more than n0Is even and n is less than or equal to 8.
Step 14, laying a bracket and a threaded steel pipe: and (4) according to the actual number n of the screws calculated in the step (13), arranging brackets and threaded steel pipes which are symmetrical about the central axis of the corresponding frame column. X-direction horizontal steel bars and Y-direction horizontal steel bars are pre-buried in each bracket.
Step 2, installing a jacking device, and specifically comprising the following steps:
Step 22, mounting a lower pressure-bearing nut: two lower pressure-bearing nuts and a threaded base plate are sequentially sleeved on each screw rod above the support.
Step 23, installing the screw and the threaded steel pipe: and (4) penetrating the top end of each screw rod through the corresponding threaded steel pipe to form a penetrating end. The screw rod is in threaded fit with the inner wall surface of the threaded steel pipe, and the thread fit clearance is not more than 1 mm. And a threaded base plate and an upper limiting nut are sleeved at the penetrating end of each screw rod in sequence.
Step 24, jack installation: and placing the jack on the ground beam right below the center of the corresponding frame column.
Step 3, circularly jacking the first round, and specifically comprising the following steps:
Step 32, synchronously jacking a jack: and synchronously jacking the jack below each frame column upwards by a set displacement A. The synchronous precision of all jacks is controlled within +/-3 mm, and the distance between the jacking asynchronous columns is less than 1 per thousand.
Step 33, adjusting the lower pressure-bearing nut: and (4) enabling two lower pressure-bearing nuts on each screw rod in each bracket to rotate upwards to set a displacement A.
Step 34, jacking for the nth time: and (5) repeating the step (3) for n times until the accumulated jacking stroke of the jack reaches the maximum set stroke of the jack.
Step 4, adding a jack cushion block: and (4) slowly resetting the jack below each frame column, and adding a jack cushion block below each jack.
And 5, circularly jacking the Nth wheel, and repeating the steps 3 to 4 for N times until the total jacking stroke of the frame column reaches the set jacking stroke.
And 6, connecting the X-direction horizontal steel bars and the Y-direction horizontal steel bars pre-embedded in each bracket to form a whole after the frame column reaches the set jacking stroke.
In step 14, the specific arrangement method of the bracket and the threaded steel pipe comprises the following steps:
when n equals 2, all symmetrically lay 2 brackets at the lateral wall bottom of corresponding frame post, all pre-buried 1 threaded steel pipe in every bracket. When n is 4, 2 or 4 brackets are symmetrically arranged at the bottom of the side wall of the corresponding frame column. When laying 4 brackets, all pre-buried 1 screw thread steel pipe in every bracket. When laying 2 brackets, all pre-buried 2 threaded steel pipes in every bracket.
When n is 6, 2 or 4 brackets are symmetrically arranged at the bottom of the side wall of the corresponding frame column. When 4 brackets are arranged, 2 threaded steel pipes are embedded in each of two symmetrical brackets. 1 threaded steel pipe is pre-buried in each of the other two symmetrical brackets. When laying 2 brackets, all pre-buried 3 threaded steel pipes in every bracket.
When n is 8, 2 or 4 brackets are symmetrically arranged at the bottom of the side wall of the corresponding frame column. When laying 4 brackets, all pre-buried 2 threaded steel pipes in every bracket. When laying 2 brackets, all pre-buried 4 threaded steel pipes in every bracket.
In step 34, when the accumulated jacking stroke of the jack reaches 20mm, a leveling instrument or a total station is adopted to monitor the verticality of the frame building, and the single jacking device is subjected to fine adjustment, so that the synchronous precision of all the frame columns is controlled within +/-3 mm.
A jacking deviation rectifying method for a frame building comprises the following steps of calculating the total jacking amount h of each frame column according to the inclination alpha of the frame building when the original settlement data of the frame building is lost, wherein the specific calculation formula is as follows:
h＝Dis×sinα (3)
in the formula, Δ S represents the horizontal distance between two different measuring points in the wall on the same side of the building, and Δ H represents the height difference between the two different measuring points in the wall on the same side of the building; the inclination alpha represents the included angle of the inclined building and the horizontal plane; dis represents the distance from a jacking point on the lower surface of the frame column to a vertical line of a neutral axis; the neutral axis is intersected with the frame building, and the frame building is provided with an intersection point or an intersection line, the jacking amount of the intersection point or the intersection line is zero, and other jacking points of the frame building can make rigid rotation around the neutral axis.
Selecting a neutral axis according to a main inclination method of the frame building, wherein the specific selection method comprises the following steps:
when the main inclination direction of the frame building is the north-south direction, the bottom of one frame column in the east-west direction is selected as a neutral axis.
When the main inclination direction of the frame building is east-west direction, the bottom of one frame column in north-south direction is selected as a neutral axis.
When the frame building inclines in both the east-west direction and the north-south direction, the neutral axis is a line passing through one of the corner points of the frame column and having an included angle with both the north-south direction and the east-west direction.
The invention has the following beneficial effects:
1. in the invention, only one jack is needed to be arranged below one frame column, so that the using number of the jacks and the using number of the jack cushion blocks are greatly reduced, the cost input is reduced and the construction speed is accelerated.
2. The screw rod, the threaded steel pipe, the support bracket and the thread fit clearance between the threaded steel pipe and the screw rod are arranged, so that the verticality precision of the frame building is high, and the inclination can be prevented.
3. The invention can be suitable for the integral lifting of the frame building and the jacking deviation correction when the original settlement data is lost.
Drawings
Fig. 1 shows a schematic structural diagram of a frame building jacking device of the invention.
Fig. 2 shows a picture of a site for jacking a frame building by using the frame building jacking device of the invention.
Figure 3 shows the selected position of the neutral axis when the main tilt direction of the frame structure is north-south.
Figure 4 shows the selected position of the neutral axis when the main tilt direction of the frame building is east-west.
Figure 5 shows the selected position of the neutral axis when tilted in both the east-west and north-south directions.
Fig. 6 shows a schematic view of the inclined state of the frame building.
Among them are:
10. a frame column; 11. a bracket; 12. a threaded steel pipe;
20. a ground beam; 21. supporting;
30. a jack; 31. a jack cushion block;
40. a screw; 41. a lower pressure bearing nut; 42. an upper limiting nut; 43. and (4) a threaded backing plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
In the description of the present invention, it is to be understood that the terms "left side", "right side", "upper part", "lower part", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and that "first", "second", etc., do not represent an important degree of the component parts, and thus are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.
As shown in fig. 1, the frame building jacking device comprises a jack 30, a screw 40, a threaded sleeve 12, an upper limiting nut 42 and a lower bearing nut 41.
The frame building comprises a number of frame columns 10 and ground beams 20.
A component scale is preferentially distributed on each frame column, the maximum component of the component scale is not more than 10mm, and each jacking point reaches the required jacking component value every time so as to prevent errors from generating and causing deformation of an upper structure; the displacement condition of the frame column can be observed at any time by common monitoring personnel in the jacking process, and the control precision is within the range of 1 millimeter.
2 or 4 brackets 11 are symmetrically arranged at the bottom of the side wall of each frame column, 1-2 threaded steel pipes are embedded in each bracket, and each threaded steel pipe is arranged along the vertical direction.
As shown in fig. 2, during specific construction, preferably, 2 brackets are symmetrically arranged at the bottom of the side wall of each frame column, and 1-4 threaded steel pipes are embedded in each bracket.
The jack is placed on the ground beam right below the center of each frame column, and a jack cushion block 31 is arranged between the jack and the ground beam.
The number of the screw rods is equal to that of the threaded steel pipes, all the screw rods are vertically arranged and are symmetrical about the jack.
The bottom of each screw rod is pre-buried in the grade beam, and the top of each screw rod all passes from corresponding threaded steel pipe to form the end of wearing out.
The maximum length of the penetrating end is not less than the jacking height of the frame building.
The screw rod is in threaded fit with the inner wall surface of the threaded steel pipe, and the thread fit clearance is preferably not more than 1mm, so that the jacking verticality of the jack is kept, and the jack is prevented from being inclined.
The section size of the screw is reduced as much as possible, and the screw is made of high-strength steel, preferably finish-rolled deformed steel. The screw needs to be subjected to sprouting treatment: the bud depth needs to reach a point where the bonding strength with the nut is greater than the material strength of the screw.
At least one lower bearing nut 41 (preferably two in this embodiment) is sleeved on the periphery of each screw below each bracket, and an upper limiting nut 42 is sleeved on the periphery of each screw above each bracket. Threaded base plates 43 are preferably arranged between the upper limiting nut and the corresponding bracket and between the lower pressure-bearing nut and the corresponding bracket.
A support 21 is preferably sleeved on the periphery of each screw rod positioned at the top of the ground beam, and the bottom of each support is fixedly connected with the ground beam. The rest height is preferably not less than the remaining height of the bottom of the truncated frame column.
A method for integrally jacking a frame building comprises the following steps.
Step 1, laying a bracket and a threaded steel pipe, and specifically comprising the following steps:
P＝A×f (1)
in the formula (1), A is the cross-sectional area of the threaded steel pipe. f is the compressive strength value of each screw.
n0＝(D+L)/ηP (2)
in the formula (2), D is the transverse load of the corresponding frame column, and L is the live load of the corresponding frame column; the calculation method of D and L is the prior art, and is not described again here; eta is a reduction coefficient, and the preferable value is 0.7-0.8.
Step 13, calculating the actual number n of the screws: the actual number n of the screw rods is more than n0Is even and n is less than or equal to 8.
Step 14, laying a bracket and a threaded steel pipe: and (4) according to the actual number n of the screws calculated in the step (13), arranging brackets and threaded steel pipes which are symmetrical about the central axis of the corresponding frame column. X-direction horizontal steel bars and Y-direction horizontal steel bars are pre-buried in each bracket.
The preferable specific layout method of the bracket and the threaded steel pipe comprises the following steps:
when n equals 2, all symmetrically lay 2 brackets at the lateral wall bottom of corresponding frame post, all pre-buried 1 threaded steel pipe in every bracket. When n is 4, 2 or 4 brackets are symmetrically arranged at the bottom of the side wall of the corresponding frame column. When laying 4 brackets, all pre-buried 1 screw thread steel pipe in every bracket. When laying 2 brackets, all pre-buried 2 threaded steel pipes in every bracket.
When n is 6, 2 or 4 brackets are symmetrically arranged at the bottom of the side wall of the corresponding frame column. When 4 brackets are arranged, 2 threaded steel pipes are embedded in each of two symmetrical brackets. 1 threaded steel pipe is pre-buried in each of the other two symmetrical brackets. When laying 2 brackets, all pre-buried 3 threaded steel pipes in every bracket.
When n is 8, 2 or 4 brackets are symmetrically arranged at the bottom of the side wall of the corresponding frame column. When laying 4 brackets, all pre-buried 2 threaded steel pipes in every bracket. When laying 2 brackets, all pre-buried 4 threaded steel pipes in every bracket.
And 2, installing the jacking device, and specifically comprising the following steps.
Step 22, mounting a lower pressure-bearing nut: two lower pressure-bearing nuts and a threaded base plate are sequentially sleeved on each screw rod above the support.
Step 23, installing the screw and the threaded steel pipe: and (4) penetrating the top end of each screw rod through the corresponding threaded steel pipe to form a penetrating end. The screw rod is in threaded fit with the inner wall surface of the threaded steel pipe, and the thread fit clearance is not more than 1 mm. And a threaded base plate and an upper limiting nut are sleeved at the penetrating end of each screw rod in sequence.
Step 24, jack installation: and placing the jack on the ground beam right below the center of the corresponding frame column.
Step 3, circularly jacking the first round, and specifically comprising the following steps:
Step 32, synchronously jacking a jack: and synchronously jacking the jack below each frame column upwards by a set displacement A. The synchronous precision of all jacks is controlled to be +/-3 mm, the distance between the jacking asynchronous columns is less than 1 per thousand, otherwise, jacking is stopped immediately, local adjustment is carried out, and jacking is carried out together after synchronization is achieved.
Step 33, adjusting the lower pressure-bearing nut: and (4) enabling two lower pressure-bearing nuts on each screw rod in each bracket to rotate upwards to set a displacement A.
Step 34, jacking for the nth time: and (5) repeating the step (3) for n times until the accumulated jacking stroke of the jack reaches the maximum set stroke of the jack.
In this embodiment, when the accumulated jacking stroke of the jack reaches 20mm, the leveling instrument or the total station is used to monitor the verticality of the frame building, and the single jacking device is subjected to fine adjustment, so that the synchronous precision of all the frame columns is controlled within +/-3 mm.
Step 4, adding a jack cushion block: and (4) slowly resetting the jack below each frame column, and adding a jack cushion block below each jack.
And 5, circularly jacking the Nth wheel, and repeating the steps 3 to 4 for N times until the total jacking stroke of the frame column reaches the set jacking stroke.
And 6, connecting the X-direction horizontal steel bars and the Y-direction horizontal steel bars pre-embedded in each bracket to form a whole after the frame column reaches the set jacking stroke.
A jacking deviation rectifying method for a frame building comprises the following steps of calculating the total jacking amount h of each frame column according to the inclination alpha of the frame building when the original settlement data of the frame building is lost, wherein the specific calculation formula is as follows:
h＝Dis×sinα (3)
in the formula, Δ S represents the horizontal distance between two different measurement points in the same side wall of the building, and Δ H represents the height difference between two different measurement points in the same side wall of the building, as shown in fig. 6.
Dis represents the perpendicular distance from the jacking point on the lower surface of the frame column to the neutral axis. The inclination alpha represents the angle of the inclined building to the horizontal. The neutral axis is intersected with the frame building, and the frame building is provided with an intersection point or an intersection line, the jacking amount of the intersection point or the intersection line is zero, and other jacking points of the frame building can make rigid rotation around the neutral axis.
Selecting a neutral axis according to a main inclination method of the frame building, wherein the specific selection method comprises the following steps:
when the main inclination direction of the frame building is the north-south direction, the bottom of one frame column in the east-west direction is selected as a neutral axis.
When the main inclination direction of the frame building is east-west direction, the bottom of one frame column in north-south direction is selected as a neutral axis.
When the frame building inclines in both the east-west direction and the north-south direction, the neutral axis is a line passing through one of the corner points of the frame column and having an included angle with both the north-south direction and the east-west direction. In fig. 5, the neutral axis is a line passing through one of the corner points of the frame column and having an angle of 45 ° with respect to the north-south and east-west directions.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent modifications can be made within the technical spirit of the present invention, and the scope of the present invention is also within the scope of the present invention.
Claims (10)
1. The utility model provides a frame building jacking device which characterized in that: comprises a jack, a screw rod, a threaded sleeve, an upper limiting nut and a lower bearing nut;
the frame building comprises a plurality of frame columns and ground beams;
the bottom of the side wall of each frame column is symmetrically provided with 2 or 4 brackets, 1-2 threaded steel pipes are embedded in each bracket, and each threaded steel pipe is arranged along the vertical direction;
the jack is placed on the ground beam right below the center of each frame column, and a jack cushion block is arranged between the jack and the ground beam;
the number of the screw rods is equal to that of the threaded steel pipes, all the screw rods are vertically arranged and are symmetrical about the jack;
the bottom end of each screw rod is embedded in the ground beam, and the top end of each screw rod penetrates through the corresponding threaded steel pipe to form a penetrating end; the maximum length of the penetrating end is not less than the jacking height of the frame building;
the screw is in threaded fit with the inner wall surface of the threaded steel pipe, and the thread fit clearance is not more than 1 mm;
every screw rod periphery below every bracket all overlaps and is equipped with at least one pressure-bearing nut down, all overlaps at every screw rod periphery of every bracket top and is equipped with last spacing nut.
2. A frame building jacking apparatus as claimed in claim 1, wherein: and two lower pressure-bearing nuts are sleeved on the periphery of each screw rod below each bracket.
3. A frame building jacking apparatus as claimed in claim 1, wherein: a support is sleeved on the periphery of each screw rod positioned at the top of the ground beam, and the bottom of each support is fixedly connected with the ground beam.
4. A frame building jacking apparatus as claimed in claim 1, wherein: 2 brackets are symmetrically arranged at the bottom of the side wall of each frame column, and 1-4 threaded steel pipes are embedded in each bracket.
5. A frame building jacking apparatus as claimed in claim 1, wherein: and threaded base plates are arranged between the upper limiting nut and the corresponding bracket and between the lower bearing nut and the corresponding bracket.
6. The integral jacking method of the frame building is characterized by comprising the following steps: the method comprises the following steps:
step 1, laying a bracket and a threaded steel pipe, and specifically comprising the following steps:
step 11, calculating the vertical bearing capacity P of a single screw, wherein the specific calculation formula is as follows:
P＝A×f (1)
in the formula (1), A is the cross-sectional area of the threaded steel pipe; f is the compressive strength value of each screw rod;
step 12, calculating the number n of screw bases0The specific calculation formula is as follows:
n0＝(D+L)/ηP (2)
in the formula (2), D is the transverse load of the corresponding frame column, and L is the live load of the corresponding frame column; eta is a reduction coefficient;
step 13, calculating the actual number n of the screws: the actual number n of the screw rods is more than n0N is not more than 8;
step 14, laying a bracket and a threaded steel pipe: according to the actual number n of the screws calculated in the step 13, arranging brackets and threaded steel pipes which are symmetrical about the central axis of the corresponding frame column; x-direction horizontal steel bars and Y-direction horizontal steel bars are pre-buried in each bracket;
step 2, installing a jacking device, and specifically comprising the following steps:
step 21, pre-embedding a screw: n screw rods are pre-buried in the ground beams corresponding to the bottoms of the frame columns, a support bracket is sleeved at the bottom of each screw rod above the ground beams, and the bottom of each support bracket is arranged on the ground beams; each screw rod is kept in a vertical state;
step 22, mounting a lower pressure-bearing nut: two lower pressure-bearing nuts and a threaded base plate are sequentially sleeved on each screw rod above the support;
step 23, installing the screw and the threaded steel pipe: the top end of each screw rod penetrates through the corresponding threaded steel pipe to form a penetrating end; the screw is in threaded fit with the inner wall surface of the threaded steel pipe, and the thread fit clearance is not more than 1 mm; a threaded base plate and an upper limiting nut are sleeved at the penetrating end of each screw rod in sequence;
step 24, jack installation: placing a jack on a ground beam right below the center of the corresponding frame column;
step 3, circularly jacking the first round, and specifically comprising the following steps:
step 31, adjusting an upper limiting nut: rotating an upper limiting nut on each screw rod in each bracket upwards to set a displacement A, wherein A is less than or equal to 10 mm;
step 32, synchronously jacking a jack: synchronously jacking a jack below each frame column upwards by a set displacement A; the synchronous precision of all jacks is controlled to be +/-3 mm, and the distance between jacking asynchronous columns is less than 1 per thousand;
step 33, adjusting the lower pressure-bearing nut: two lower pressure-bearing nuts on each screw rod in each bracket are rotated upwards to set a displacement A;
step 34, jacking for the nth time: repeating the step 3 for n times until the accumulated jacking stroke of the jack reaches the maximum set stroke of the jack;
step 4, adding a jack cushion block: slowly resetting the jack below each frame column, and adding a jack cushion block below each jack;
step 5, circularly jacking the Nth wheel, and repeating the step 3 to the step 4 for N times until the total jacking stroke of the frame column reaches the set jacking stroke;
and 6, connecting the X-direction horizontal steel bars and the Y-direction horizontal steel bars pre-embedded in each bracket to form a whole after the frame column reaches the set jacking stroke.
7. The method for integrally jacking a frame structure according to claim 6, wherein: in step 14, the specific arrangement method of the bracket and the threaded steel pipe comprises the following steps:
when n is 2, symmetrically arranging 2 brackets at the bottom of the side wall of the corresponding frame column, and embedding 1 threaded steel pipe in each bracket;
when n is 4, symmetrically arranging 2 or 4 corbels at the bottom of the side wall of the corresponding frame column; when 4 brackets are arranged, 1 threaded steel pipe is pre-embedded in each bracket; when 2 brackets are arranged, 2 threaded steel pipes are pre-buried in each bracket;
when n is 6, symmetrically arranging 2 or 4 corbels at the bottom of the side wall of the corresponding frame column; when 4 brackets are arranged, 2 threaded steel pipes are embedded in each of two symmetrical brackets; 1 threaded steel pipe is embedded in each of the other two symmetrical brackets; when 2 brackets are arranged, 3 threaded steel pipes are pre-buried in each bracket;
when n is 8, symmetrically arranging 2 or 4 corbels at the bottom of the side wall of the corresponding frame column; when 4 brackets are arranged, 2 threaded steel pipes are pre-buried in each bracket; when laying 2 brackets, all pre-buried 4 threaded steel pipes in every bracket.
8. The method for integrally jacking a frame structure according to claim 6, wherein: in step 34, when the accumulated jacking stroke of the jack reaches 20mm, a leveling instrument or a total station is adopted to monitor the verticality of the frame building, and the single jacking device is subjected to fine adjustment, so that the synchronous precision of all the frame columns is controlled within +/-3 mm.
9. A jacking deviation rectifying method for a frame building is characterized by comprising the following steps: when the original settlement data of the frame building is lost, calculating the total jacking amount h of each frame column according to the inclination alpha of the frame building, wherein the specific calculation formula is as follows:
h＝Dis×sinα (3)
in the formula, Δ S represents the horizontal distance between two different measuring points in the wall on the same side of the building, and Δ H represents the height difference between the two different measuring points in the wall on the same side of the building; the inclination alpha represents the included angle of the inclined building and the horizontal plane; dis represents the distance from a jacking point on the lower surface of the frame column to a vertical line of a neutral axis; the neutral axis is intersected with the frame building, and the frame building is provided with an intersection point or an intersection line, the jacking amount of the intersection point or the intersection line is zero, and other jacking points of the frame building can make rigid rotation around the neutral axis.
10. The jacking deviation rectifying method for the frame building according to claim 9, wherein: selecting a neutral axis according to a main inclination method of the frame building, wherein the specific selection method comprises the following steps:
when the main inclination direction of the frame building is the north-south direction, the bottom of one frame column in the east-west direction is selected as a neutral axis;
when the main inclination direction of the frame building is east-west direction, selecting one frame column bottom in south-north direction as a neutral axis;
when the frame building inclines in both the east-west direction and the north-south direction, the neutral axis is a line passing through one of the corner points of the frame column and having an included angle with both the north-south direction and the east-west direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011547937.2A CN112696050B (en) | 2020-12-24 | 2020-12-24 | Frame building jacking device, integral jacking method and jacking deviation rectifying method |
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Cited By (4)
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| CN114704108A (en) * | 2022-04-29 | 2022-07-05 | 江苏鸿基节能新技术股份有限公司 | Jacking device for building storey addition |
| CN114922461A (en) * | 2022-05-24 | 2022-08-19 | 江苏鸿基节能新技术股份有限公司 | Building structure jacking construction device and process |
| CN115262994A (en) * | 2022-08-17 | 2022-11-01 | 山东轨道交通勘察设计院有限公司 | Inverted anti-overturn locking construction device and method |
| CN115324202A (en) * | 2022-10-14 | 2022-11-11 | 山东建筑大学 | Lifting device of building supported by stand column and construction method |
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| CN114704108A (en) * | 2022-04-29 | 2022-07-05 | 江苏鸿基节能新技术股份有限公司 | Jacking device for building storey addition |
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| CN114922461A (en) * | 2022-05-24 | 2022-08-19 | 江苏鸿基节能新技术股份有限公司 | Building structure jacking construction device and process |
| CN115262994A (en) * | 2022-08-17 | 2022-11-01 | 山东轨道交通勘察设计院有限公司 | Inverted anti-overturn locking construction device and method |
| CN115324202A (en) * | 2022-10-14 | 2022-11-11 | 山东建筑大学 | Lifting device of building supported by stand column and construction method |
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