CN113882443A - Unidirectional deviation rectifying method for building - Google Patents
Unidirectional deviation rectifying method for building Download PDFInfo
- Publication number
- CN113882443A CN113882443A CN202111238468.0A CN202111238468A CN113882443A CN 113882443 A CN113882443 A CN 113882443A CN 202111238468 A CN202111238468 A CN 202111238468A CN 113882443 A CN113882443 A CN 113882443A
- Authority
- CN
- China
- Prior art keywords
- concrete
- building
- bearing platform
- column
- jacking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D35/00—Straightening, lifting, or lowering of foundation structures or of constructions erected on foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
Abstract
The invention relates to the field of building deviation correction, and particularly discloses a unidirectional deviation correction method for a building, which can realize deviation correction of the building which is settled in a single direction, and only needs to disconnect a concrete column at one side needing deviation correction and a steel bar in the column in the building in the deviation correction process, and judges whether the concrete column at one side not needing deviation correction and the steel bar in the column in the building need to be disconnected or not according to the following formula:
when the gamma delta H is less than 0.09H, the concrete column on one side, which does not need to be rectified, in the building and the steel bars in the column do not need to be disconnected; when gamma.DELTA.h>When the height is 0.09H, the concrete column on the side, which does not need to be corrected, in the building needs to be disconnected, and the steel bar in the concrete column close to the side, which needs to be corrected, in the column also needs to be disconnected; therefore, the method for correcting the deviation of the building in the single direction not only can reduce the number of the concrete jacking bearing platforms and reduce the damage to the original structure of the building, but also has the advantages of low manufacturing cost, simple process and short construction period.
Description
Technical Field
The invention relates to a deviation rectifying method for a building, in particular to a unidirectional deviation rectifying method for a building.
Background
For a building with a frame structure which is inclined in one direction and caused by uneven settlement of a foundation, a column breakage deviation rectifying technology can be adopted for rectifying deviation, the conventional column breakage deviation rectifying technology is that concrete jacking bearing platforms are arranged on the upper side and the lower side of all concrete columns of the building, a jacking device is arranged between the upper concrete jacking bearing platform and the lower concrete jacking bearing platform in all the concrete columns on one side of the building which needs to be jacked, and the jacking device can be formed by a jack and a corresponding supporting structure (such as a steel cushion block); a hinged bearing platform is arranged between the upper and lower concrete jacking bearing platforms in all the concrete columns on one side which does not need to be jacked; then all the concrete columns and steel bars in the concrete columns are cut off, and one inclined side in the building is jacked through a jack in the jacking device, so that the whole building rotates by taking the hinged bearing platform as a rotating fulcrum; and when the verticality of the building is detected to meet the requirement, continuing the disconnected concrete column and the steel bar in the column, and finally chiseling the concrete jacking bearing platform. The method for correcting the deviation of the broken column jacking of the building, disclosed in the Chinese invention patent with the patent number ZL96119073.6, is just adopted; however, in the above method for correcting the deviation of the broken columns of the building by jacking, the upper and lower concrete jacking bearing platforms need to be arranged on all the concrete columns in the building, and all the concrete columns and steel bars in the columns in the building need to be broken; therefore, the process is complex, the manufacturing cost is high, and the construction period is long.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a unidirectional deviation rectifying method for a building, which can reduce the number of concrete jacking bearing platforms and reduce the damage to the original structure of the building and has the advantages of low manufacturing cost, simple process and short construction period.
The technical scheme for solving the technical problems is as follows:
a unidirectional deviation rectifying method for a building comprises the following steps:
(1) setting concrete jacking bearing platforms on the concrete column on one side needing deviation correction in the building, wherein the two groups of concrete jacking bearing platforms are divided into an upper concrete jacking bearing platform and a lower concrete jacking bearing platform, the upper concrete jacking bearing platform is positioned above the concrete column, and the lower concrete jacking bearing platform is positioned below the concrete column;
(2) the jacking device is arranged between the upper concrete jacking bearing platform and the lower concrete jacking bearing platform, the lower end of the jacking device is supported on the lower concrete jacking bearing platform, and the upper end of the jacking device acts on the upper concrete jacking bearing platform;
(3) disconnecting the concrete column and the steel bars in the column between the upper concrete jacking bearing platform and the lower concrete jacking bearing platform; and whether the concrete column on one side which does not need to be rectified in the building and the steel bar in the column need to be disconnected or not is judged by the following formula:
wherein, delta h is a control variable of the rotating shaft column, and the unit is mm; b is the width of the rotating shaft column, and the unit is mm; h is the jacking height required by deviation correction, namely the jacking height of the concrete on the side needing deviation correction; the unit is mm; l is the total span of the building, namely the maximum linear distance between the concrete column on the side needing to be corrected and the concrete column on the side not needing to be corrected, and the unit is mm; the rotating shaft column refers to a concrete column located on one side of a rotating fulcrum in the building deviation rectifying process, namely the concrete column on one side of the building, which does not need to be rectified;
when gamma delta H is less than 0.09H, wherein H is the calculated height of the first-layer column, namely the distance between the foundation surface and the floor of the second layer of the building, and the unit is mm; gamma is a structural importance coefficient; the concrete column on one side of the building which does not need to be rectified and the steel bar in the column do not need to be disconnected; when the gamma delta H is greater than 0.09H, the concrete column at one side, which does not need to be corrected, in the building needs to be disconnected, and the steel bar in the concrete column close to the side, which needs to be corrected, in the column also needs to be disconnected;
(4) the jacking device jacks the upper concrete jacking bearing platform, and stops jacking when the verticality of the building meets the requirement;
(5) and continuing the broken concrete column and the steel bar in the column, and finally chiseling the concrete jacking bearing platform.
Preferably, before construction, the foundation structure of the building needs to be detected, and if the foundation structure of the building does not meet the standard, the foundation structure of the building needs to be reinforced, including the following steps:
s1, mounting and connecting bearing platforms on the foundation bearing platform of the building;
s2, installing a pile pressing device on the connecting bearing platform, and sequentially implanting a plurality of precast piles into the ground through pile holes in the connecting bearing platform by the pile pressing device; simultaneously completing the connection of two adjacent precast piles;
s3, fixing the precast pile positioned at the top with the connecting bearing platform through a concrete steel frame structure;
and S4, removing the pile pressing device to finish the reinforcement of the foundation structure of the building.
Preferably, the length x width of the precast pile is 250mm x 250 mm; the bearing capacity characteristic value MCT of the single precast pile is 500 KN; in the pile pressing process, the condition that the sinking amount of the precast pile is not more than 2mm within 0.5h of pressure application is taken as the final pile condition, and the pile length of each precast pile is 10 m.
Preferably, the connecting bearing platforms are arranged on two sides of the basic bearing platform and are arranged in a staggered manner; the steel bars in the connecting bearing platform are implanted into the foundation bearing platform from the side surface of the foundation bearing platform; and interface processing is required to be carried out on a contact surface between the basic bearing platform and the connecting bearing platform.
Preferably, the jacking device comprises jacks and a plurality of groups of steel member cushion blocks, wherein the jacks are divided into a plurality of groups; when the jack is a single group and is arranged at the lower side of the broken column part in the concrete column, the centroid of the jack is superposed with that of the concrete column; when the jacks are in multiple groups and are respectively arranged on two sides of the concrete column together with the multiple groups of steel member cushion blocks, the combined centroids of the multiple groups of jacks and the multiple groups of steel member cushion blocks coincide with the centroid of the concrete column.
Preferably, in the step (3), before the concrete column between the upper concrete jacking bearing platform and the lower concrete jacking bearing platform is disconnected, a fracture with the height not more than 20cm is chiseled on the concrete column, after the fact that the concrete jacking bearing platform does not settle and the concrete jacking bearing platform does not crack or deform is determined in a top trial mode, the concrete is chiseled to meet the design requirement, and then the reinforcing steel bars in the column are disconnected.
Preferably, in the step (4), after the jack is jacked for a certain distance, a steel base plate needs to be added at the top or the bottom of the steel member cushion block between the upper concrete jacking bearing platform and the lower concrete jacking bearing platform; then, after the jack is reset, adding a steel base plate at the top or the bottom of the jack; and then the jack lifts the next distance.
Preferably, in the step (5), when steel bars in the column in the concrete column are connected, steel bars with the same specification as the broken steel bars are adopted for binding and welding connection; in the process of dismantling the concrete jacking bearing platform, manual chiseling is needed when the concrete column is dismantled to a position 10Ccm away from the concrete column; and cutting off the anchor bars in the concrete jacking bearing platform at the edge of the concrete column, and batching cement mortar.
Preferably, prior to construction, a fabricated structural chassis is provided on the superstructure of the building, said fabricated structural chassis urging the superstructure of the building into a rigid structure.
Preferably, the lower concrete jacking bearing platform is an original foundation bearing platform or a newly-added column-wrapping bearing platform; the upper concrete jacking bearing platform is a covering bearing platform.
Compared with the prior art, the invention has the following beneficial effects:
1. the unidirectional deviation rectifying method for the building can realize unidirectional deviation rectifying for the building, and in the deviation rectifying process, only the concrete column on one inclined side of the building and the steel bar in the column need to be disconnected, and whether the concrete column needs to be disconnected on the other side of the building can be determined according to the situation; the invention also provides a corresponding judging method, namely
When the gamma delta H is less than 0.09H, the concrete column on one side, which does not need to be rectified, in the building and the steel bars in the column do not need to be disconnected, which also indicates that the upper structure of the building does not deform, crack and the like in the rectifying process; when gamma.DELTA.h>When the height is 0.09H, the concrete column on the side, which does not need to be corrected, in the building needs to be disconnected, and the steel bar in the concrete column close to the side, which needs to be corrected, in the column also needs to be disconnected; therefore, the damage to the original structure of the building can be reduced, and the whole deviation rectifying engineering is simple in process, short in construction period and low in manufacturing cost.
2. The unidirectional deviation rectifying method for the building only needs to disconnect the concrete columns on one side of the building and the steel bars in the columns, so that only concrete jacking bearing platforms (or column wrapping bearing platforms) are arranged in the concrete columns needing to be subjected to column breakage, the number of the concrete jacking bearing platforms can be reduced, and the construction period and the construction cost are further reduced.
3. The building unidirectional deviation rectifying method provides a corresponding judgment formula, a building structure is pre-judged through the judgment formula before column breakage deviation rectifying is carried out, if the judgment formula is met, the building unidirectional deviation rectifying method can be used for rectifying deviation, and if the judgment formula is not met, a conventional deviation rectifying method is used for rectifying deviation; the method can provide a basis for a constructor to select the building one-way deviation rectifying method or a conventional deviation rectifying method before construction, and for satisfying the building one-way deviation rectifying method, the method can be directly adopted, so that the construction cost is reduced, the efficiency is improved, and the construction period is shortened.
Drawings
Fig. 1 is a layout view of a concrete jacking platform in the unidirectional deviation rectifying method for a building of the invention.
Fig. 2 is a layout view of a jacking device in a concrete jacking cap.
Fig. 3 is a sectional view taken along a-a in fig. 2.
Fig. 4 is a sectional view taken along the direction B-B in fig. 2.
Fig. 5 is a diagram of a foundation reinforcement arrangement for a building precursor structure.
Fig. 6 is a schematic view of the installation of the connection platform.
Fig. 7 is a cross-sectional view taken in the direction of C-C in fig. 6.
Fig. 8 is a cross-sectional view taken in the direction D-D of fig. 7.
Fig. 9 is a schematic structural view of the pile driver.
Fig. 10 is a schematic view of the mounting of the reaction frame.
FIG. 11 is a schematic view of the mounting of the fabricated rigid chassis.
Fig. 12 is a partial enlarged view at E in fig. 11.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
Referring to fig. 1 to 12, the method for correcting the deviation of the building in a single direction according to the present invention is used for correcting the deviation of the building in a single direction, that is, correcting the deviation of the building inclined in only one direction; in fig. 1, a side of the building located on the B-axis is inclined, so that a deviation correction needs to be performed on the side of the building located on the B-axis, specifically including the following steps:
(1) before construction, reinforcing the foundation structure;
before construction, a foundation structure of a building needs to be detected, and if the foundation structure of the building does not meet a standard, the foundation structure of the building needs to be reinforced, wherein in the embodiment, static pressure concrete square piles are adopted to reinforce the foundation structure of the building, the number of newly added static pressure concrete square piles (namely precast piles 14) is 10, and the length of each precast pile 14 is 10 meters on average; the concrete reinforcing steps are as follows:
s11, before construction, whether old foundations, boulders and other factors influencing the construction of the precast pile 14 exist underground or not must be detected at the pile position by using steel bars and the like; if yes, it must be cleared;
s12, mounting a connecting bearing platform 13 on a basic bearing platform 8 of a building, wherein the connecting bearing platform 13 is an anchor bar type bearing platform, and the concrete strength grade is C25; the thickness of the steel bar protective layer at the bottom of the connecting bearing platform 13 is 40mm, and a concrete cushion layer with the thickness of 100mm and the concrete strength grade of C10 is arranged below the steel bar protective layer;
s13, installing a pile pressing device on the connecting bearing platform 13, sequentially implanting a plurality of precast piles 14 into the ground through reserved pile pressing holes in the connecting bearing platform 13 by the pile pressing device, and simultaneously completing the connection of two adjacent precast piles 14;
s14, fixing the precast pile 14 positioned at the top and the connecting bearing platform 13 through a concrete steel frame structure;
and S15, removing the pile pressing device to finish reinforcing the foundation structure of the building.
Wherein, the length multiplied by the width of the precast pile 14 is 250mm multiplied by 250 mm; the bearing capacity characteristic value MCT of the single precast pile 14 is 500 KN; the construction pressure is 1.5 times of the characteristic value of the bearing capacity; in the pile pressing process, the condition that the sinking amount of the precast pile 14 is not more than 2mm within 0.5h of pressure application is taken as the final pile condition; in addition, the concrete strength grade of the precast pile 14 is C30, and the hydraulic jack 10 is used as power; the length of the last precast pile 14 extending into the connecting bearing platform 13 is more than or equal to 50 mm.
In addition, the reserved pile pressing hole on the connecting bearing platform 13 is reserved during pouring of the foundation concrete, the reserved pile pressing hole is frustum-shaped, and a frustum-shaped reserved pile pressing hole template can be formed by embedding a fixed template once through a steel reinforcement framework and two layers of 4 mm-hole wire nets without detaching the template. In addition, in the pile pressing process, the allowable deviation of the pressing perpendicularity of the first precast pile 14 is controlled within 5 mm; and the adjacent two precast piles 14 are connected by angle steel welding.
Referring to fig. 1 to 12, the connecting bearing platforms 13 are two groups, and the two groups of connecting bearing platforms 13 are arranged on two sides of the base bearing platform 8 and are arranged in a staggered manner; the steel bars in the connecting bearing platform 13 are implanted into the foundation bearing platform 8 from the side surface of the foundation bearing platform 8, the implantation depth is 15d, wherein d is the diameter of the implanted steel bars; and the implantation depth can not be larger than the side length of the section of the basic bearing platform 8; the interface processing is needed on the contact surface between the basic bearing platform 8 and the connecting bearing platform 13; the steel bar implantation comprises the following steps, and the following requirements are met:
s21, positioning the wire releasing: paying off and positioning according to a reinforcement design part, and determining a position needing to be embedded with a steel bar on the surface of concrete;
s22, drilling: drilling a bar planting hole by adopting a percussion drill, and when the drilling hole meets the original steel bar, adjusting the hole position to avoid the original steel bar and avoiding drilling off the original steel bar;
s23, cleaning holes: after drilling, cleaning the hole wall by using a hard brush or a hard nylon brush, cleaning broken slag and dust in the hole, and keeping the hole channel dry;
s24, injecting glue: preparing an adhesive, and filling the prepared adhesive into the bar-planting holes by using a tool, wherein the filling amount is 1/2-2/3 of the depth of the bar-planting holes, and a small amount of the adhesive overflows after the steel bars are inserted;
s25, planting bars: brushing the inserted part of the steel bar to be planted with a steel wire brush, then inserting the steel bar into the steel bar planting hole in a rotating manner, and keeping the steel bar static until the adhesive is cured;
s26, protection: before the adhesive is solidified, the planted steel bars cannot be treaded and collided; when the steel bars are planted, the steel bars are preferably planted after being welded; if the post-welding is necessary, the welding point is more than 20 days away from the surface of the base material concrete, and the root of the exposed part of the planted steel bar is wrapped by a wet towel soaked by ice water.
Referring to fig. 1 to 12, the pile pressing device may be implemented by using an existing pile pressing device, and the pile pressing device in this embodiment includes a reaction frame 9 disposed on a connection bearing platform 13 and a jack 10 disposed on the reaction frame 9, wherein the lower end of the reaction frame 9 is mounted on the connection bearing platform 13 through an anchor rod 12, the upper end of the reaction frame is provided with a section steel beam 15, and the jack 10 is disposed on the section steel beam 15 and is located above a reserved pile pressing hole of the connection bearing platform 13; a steel plate 11 is arranged between the jack 10 and a precast pile 14 to be implanted; the precast piles 14 are planted one by one in the ground by the jack 10.
(2) During construction, correcting the deviation of the building which inclines in one direction;
(2-1) arranging concrete jacking bearing platforms on a concrete column 5 on one side (located on one side of a B shaft) needing deviation correction in a building, wherein the two groups of concrete jacking bearing platforms are divided into an upper concrete jacking bearing platform 1 and a lower concrete jacking bearing platform, the upper concrete jacking bearing platform 1 is located above the concrete column 5, and the lower concrete jacking bearing platform is located below the concrete column 5; the lower concrete jacking bearing platform is an original foundation bearing platform 8 of a building or a newly-added wrapped column bearing platform; in this embodiment, the upper concrete jacking bearing platform 1 is a column wrapping bearing platform, and the lower concrete jacking bearing platform is an original foundation bearing platform 8;
(2-2) arranging a jacking device between the upper concrete jacking bearing platform 1 and the lower concrete jacking bearing platform;
(2-3) disconnecting the concrete column 5 and the steel bars in the column between the upper concrete jacking bearing platform 1 and the lower concrete jacking bearing platform; and whether the concrete column 5 at one side (namely one side positioned at the A shaft) which does not need to be rectified in the building needs to be disconnected with the steel bar in the column is judged by the following formula:
wherein, delta h is a control variable of the rotating shaft column, and the unit is mm; b is the width of the rotating shaft column, and the unit is mm; h is the height of the concrete column to be rectified, namely the jacking height of the concrete column on the side to be rectified, and the height is obtained by actually measuring the building gradient and height and calculating the height through a trigonometric function relationship, wherein the unit is mm; l is the maximum distance of the outer shaft column side, namely the total column span, namely the maximum linear distance between the concrete column on the side needing to be corrected and the concrete column on the side not needing to be corrected, and the unit is mm; the rotating shaft column refers to a concrete column on one side where deviation rectification is not needed, and in the embodiment, the rotating shaft column is located on one side of the shaft A.
When γ Δ H < 0.09H, where H is the height calculated for the first floor column, i.e., the height in mm from the base level (e.g., ground) to the floor level of the second floor of the building; gamma is a structural important coefficient, and the structural important coefficient can be selected according to concrete structure design specifications and building structure reliability design unified standards; the concrete column 5 at one side of the building which does not need to be rectified (namely, the side of the building which is positioned at the A shaft) and the steel bar in the column do not need to be disconnected; when the gamma delta H is greater than 0.09H, the concrete column 5 at one side (namely, one side of the A shaft in the building) which does not need to be rectified in the building needs to be disconnected, and the steel bars in the concrete column 5 close to one side (namely, one side of the B shaft in the building) which needs to be rectified in the building also need to be disconnected;
(2-4) jacking the upper concrete jacking bearing platform 1 by the jacking device, and stopping jacking by the jacking device when the verticality of the building meets the requirement;
and (2-5) connecting the broken concrete column 5 and the steel bars in the column, and finally chiseling the concrete jacking bearing platform.
Referring to fig. 1-12, the jacking device comprises jacks 2 and a plurality of groups of steel member cushion blocks 3, wherein the jacks 2 are in a plurality of groups; when the jack 2 is a single group and is arranged at the lower side of the column breakage part in the concrete column 5, the centroid of the jack 2 is superposed with that of the concrete column 5; when the jacks 2 are multiple groups and are arranged on two sides of the concrete column 5 together with the steel member cushion blocks 3, the centroid of the concrete column 5 coincides with the combined centroids of the multiple groups of jacks 2 or the steel member cushion blocks 3. In addition, it is necessary to ensure that the centers of the jacks 2 and the steel member blocks 3 should be on the center line of the concrete jacking platform (or the section steel jig).
Referring to fig. 1-12, when the jacking device is arranged, the steel member cushion block 3 in the jacking device is arranged on the original foundation bearing platform 8 or a new concrete jacking bearing platform; if the contact surface of the steel member cushion block 3 and the original foundation bearing platform 8 is a slope surface, the contact surface must be chiseled by 10mm-20mm, cleaned, brushed with pure cement slurry twice and then poured with concrete for leveling; if the height of the steel member cushion block 3 exceeds 450mm, a section of steel pipe cushion block with the height of 450mm is used, concrete piers are used below the steel pipe cushion block, and soil is filled around the concrete piers and tamped so as to ensure the stability of the concrete piers.
Referring to fig. 1 to 12, in this embodiment, an interface for joining new and old concrete structures needs to be processed, and the interface processing specifically includes the following steps:
s41, chiseling the surface of the original concrete at the joint surfaces of all the new and old concrete, wherein the whole surface is required to expose the fresh concrete, and the chiseling depth is 4-6 mm;
s42, cleaning the dust on the roughened surface of the concrete by using clean water and a steel wire brush;
s43, before new concrete is poured, the chiseled surface is maintained by spraying water for not less than 12 hours, and cement paste with the water-cement ratio of 0.5 is coated in 0.5 hour before the concrete is poured;
s44, when the beams and columns are wrapped by newly poured concrete layers on three or four sides, chiseling edges and corners of the sections at the same time;
and S45, when an abnormal condition such as a crack is found during the scabbling, informing a designer.
Referring to fig. 1 to 12, in step (2-3), before breaking the concrete column 5 between the upper concrete jacking platform 1 and the lower concrete jacking platform, a fracture with a height of not more than 20cm is chiseled on the concrete in the concrete column 5, after determining that the concrete jacking platform has no settlement and the concrete jacking platform has no crack or deformation by means of top trial, chiseling the concrete to the design requirement (for example, chiseling the concrete to a specific size), and then breaking the steel bars in the column. Meanwhile, before the column is broken, the concrete jacking bearing platform needs to be tried to be jacked, and the concrete jacking bearing platform is still not damaged after the concrete column 5 is cracked.
Referring to fig. 1 to 12, in the step (2-4), after the jack 2 lifts a certain distance, a steel plate 7 is added at the broken column position for supporting, and a steel base plate 6 is also added at the top or bottom of the steel member cushion block 3 between the upper concrete lifting bearing platform 1 and the lower concrete lifting bearing platform; then, after the jack 2 is reset, adding a steel base plate 6 at the top or the bottom of the jack 2; and then the jack 2 lifts up for the next distance. Through operating like this, can guarantee jack 2 and only need the jacking same distance at every turn, promptly jack 2's piston rod motion stroke homogeneous phase is the same at every turn, and like this before jacking next time, the weight of building all acts on steel cushion and steel member cushion 3 to prevent jack 2's piston rod's motion stroke overlength and take place to warp under the action of gravity of building.
Referring to fig. 1-12, in the step (2-5), when the steel bars in the column in the concrete column 5 are connected, the steel bars with the same specification as the broken steel bars are used for bonding and welding, and the steel bars are left at the upper side and the lower side of the broken position to facilitate welding when the column is broken; when the concrete jacking bearing platform is disassembled, manual chiseling is needed when the concrete column is disassembled to the position 510Ccm away from the concrete column; cutting off the anchor bars in the concrete jacking bearing platform at the edge of the concrete column 5, and batching cement mortar; the strength grade of the concrete of the connecting column is at least one grade higher than the designed strength grade of the original column; and the concrete jacking bearing platform can be disassembled after the strength grade of the concrete to be connected reaches the design bearing capacity requirement.
In this embodiment, the installation of the anchor bars is involved when installing the concrete jacking platform 1 and the connecting bearing platform 13, wherein the installation of the anchor bars should satisfy the following requirements:
s31, drilling holes in the original structure of the building, stopping drilling if the holes touch steel bars during drilling, and drilling after moving hole positions; wherein the aperture of the hole is at least 4mm larger than the diameter of the anchor bar; and the diameter of the hole is not more than 38 mm;
s32, cleaning the drilled hole by water or air;
s33, filling TN glue in the holes, and then inserting anchor bars;
s34, the anchor bars are not disturbed before TN is solidified by gelling;
and S35, checking whether the anchor bars in each hole are loosened after construction, and if so, performing supplementary operation.
S36, when the anchor bars are constructed on the concrete column 5 or the shear wall, the anchor bars need to be constructed in batches, each batch of anchor bars should not exceed two holes in any horizontal section of the column wall, and the next batch of anchor bars can be constructed after the previous batch of anchor bars TN are solidified by gelling.
Referring to fig. 11 and 12, as a preferred embodiment;
before construction, a fabricated structural chassis 17 is provided on the superstructure of the building, said fabricated structural chassis 17 urging the superstructure of the building into a rigid structure. Therefore, the upper structure of the building can be effectively prevented from cracking in the deviation rectifying process.
The above description is a preferred embodiment of the present invention, but the present invention is not limited to the above description, and any other changes, modifications, substitutions, blocks and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and they are included in the scope of the present invention.
Claims (10)
1. A unidirectional deviation rectifying method for a building is characterized by comprising the following steps:
(1) setting concrete jacking bearing platforms on the concrete column on one side needing deviation correction in the building, wherein the two groups of concrete jacking bearing platforms are divided into an upper concrete jacking bearing platform and a lower concrete jacking bearing platform, the upper concrete jacking bearing platform is positioned above the concrete column, and the lower concrete jacking bearing platform is positioned below the concrete column;
(2) the jacking device is arranged between the upper concrete jacking bearing platform and the lower concrete jacking bearing platform, the lower end of the jacking device is supported on the lower concrete jacking bearing platform, and the upper end of the jacking device acts on the upper concrete jacking bearing platform;
(3) disconnecting the concrete column and the steel bars in the column between the upper concrete jacking bearing platform and the lower concrete jacking bearing platform; and whether the concrete column on one side which does not need to be rectified in the building and the steel bar in the column need to be disconnected or not is judged by the following formula:
wherein, delta h is a control variable of the rotating shaft column, and the unit is mm; b is the width of the rotating shaft column, and the unit is mm; h is the jacking height required by deviation correction, namely the jacking height of the concrete on the side needing deviation correction; the unit is mm; l is the total span of the building, namely the maximum linear distance between the concrete column on the side needing to be corrected and the concrete column on the side not needing to be corrected, and the unit is mm; the rotating shaft column refers to a concrete column located on one side of a rotating fulcrum in the building deviation rectifying process, namely the concrete column on one side of the building, which does not need to be rectified;
when gamma delta H is less than 0.09H, wherein H is the calculated height of the first-layer column, namely the distance between the foundation surface and the floor of the second layer of the building, and the unit is mm; gamma is a structural importance coefficient; the concrete column on one side of the building which does not need to be rectified and the steel bar in the column do not need to be disconnected; when the gamma delta H is greater than 0.09H, the concrete column at one side, which does not need to be corrected, in the building needs to be disconnected, and the steel bar in the concrete column close to the side, which needs to be corrected, in the column also needs to be disconnected;
(4) the jacking device jacks the upper concrete jacking bearing platform, and stops jacking when the verticality of the building meets the requirement;
(5) and continuing the broken concrete column and the steel bar in the column, and finally chiseling the concrete jacking bearing platform.
2. The building unidirectional rectification method of claim 1, wherein before construction, the foundation structure of the building needs to be detected, and if the foundation structure of the building does not meet the standard, the foundation structure of the building needs to be reinforced, comprising the following steps:
s1, mounting and connecting bearing platforms on the foundation bearing platform of the building;
s2, installing a pile pressing device on the connecting bearing platform, and sequentially implanting a plurality of precast piles into the ground through pile holes in the connecting bearing platform by the pile pressing device; simultaneously completing the connection of two adjacent precast piles;
s3, fixing the precast pile positioned at the top with the connecting bearing platform through a concrete steel frame structure;
and S4, removing the pile pressing device to finish the reinforcement of the foundation structure of the building.
3. The building unidirectional deviation rectifying method as claimed in claim 2, wherein the length x width of the precast pile is 250mm x 250 mm; the bearing capacity characteristic value MCT of the single precast pile is 500 KN; in the pile pressing process, the condition that the sinking amount of the precast pile is not more than 2mm within 0.5h of pressure application is taken as the final pile condition, and the pile length of each precast pile is 10 m.
4. The building unidirectional deviation rectifying method according to claim 1, wherein the connecting bearing platforms are arranged on two sides of the foundation bearing platform and are staggered; the steel bars in the connecting bearing platform are implanted into the foundation bearing platform from the side surface of the foundation bearing platform; and interface processing is required to be carried out on a contact surface between the basic bearing platform and the connecting bearing platform.
5. The method for correcting the unidirectional deviation of the building according to claim 1, wherein the jacking device comprises jacks and a plurality of groups of steel member cushion blocks, wherein the jacks are provided in a plurality of groups; when the jack is a single group and is arranged at the lower side of the broken column part in the concrete column, the centroid of the jack is superposed with that of the concrete column; when the jacks are in multiple groups and are respectively arranged on two sides of the concrete column together with the multiple groups of steel member cushion blocks, the combined centroids of the multiple groups of jacks and the multiple groups of steel member cushion blocks coincide with the centroid of the concrete column.
6. The building unidirectional rectification method of claim 1, wherein in the step (3), before the concrete column between the upper concrete jacking bearing platform and the lower concrete jacking bearing platform is disconnected, a fracture with the height not more than 20cm is chiseled on the concrete column, after the concrete jacking bearing platform is determined to have no settlement and no crack or deformation in the concrete jacking bearing platform in a top trial mode, the concrete is chiseled to the design requirement, and then the steel bars in the column are disconnected.
7. The unidirectional building deviation rectifying method according to claim 5, wherein in the step (4), after each jack is jacked for a certain distance, a steel backing plate is added at the top or bottom of the steel member cushion block between the upper concrete jacking bearing platform and the lower concrete jacking bearing platform; then, after the jack is reset, adding a steel base plate at the top or the bottom of the jack; and then the jack lifts the next distance.
8. The building unidirectional deviation rectifying method according to claim 5, wherein in the step (5), when connecting the steel bars in the concrete column, the steel bars with the same specification as the broken steel bars are adopted for binding and welding connection; in the process of dismantling the concrete jacking bearing platform, manual chiseling is needed when the concrete column is dismantled to a position 10Ccm away from the concrete column; and cutting off the anchor bars in the concrete jacking bearing platform at the edge of the concrete column, and batching cement mortar.
9. The method of claim 1, wherein a fabricated structural chassis is provided on the superstructure of the building prior to construction, the fabricated structural chassis urging the superstructure of the building into a rigid structure.
10. The building unidirectional deviation rectifying method according to claim 1, wherein the lower concrete jacking bearing platform is an original foundation bearing platform or a newly added column wrapping bearing platform; the upper concrete jacking bearing platform is a covering bearing platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111238468.0A CN113882443B (en) | 2021-10-25 | 2021-10-25 | Unidirectional deviation rectifying method for building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111238468.0A CN113882443B (en) | 2021-10-25 | 2021-10-25 | Unidirectional deviation rectifying method for building |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113882443A true CN113882443A (en) | 2022-01-04 |
| CN113882443B CN113882443B (en) | 2022-06-14 |
Family
ID=79013497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111238468.0A Active CN113882443B (en) | 2021-10-25 | 2021-10-25 | Unidirectional deviation rectifying method for building |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113882443B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115341778A (en) * | 2022-08-16 | 2022-11-15 | 广东中青建筑科技有限公司 | Building rectification column node reinforcing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19648648A1 (en) * | 1996-11-18 | 1997-04-24 | Bertold Domasch | Method of stabilising and raising tower-like structures positioned at an angle |
| CN1165234A (en) * | 1996-05-15 | 1997-11-19 | 广州市鲁班建筑防水补强专业公司 | Method for jacking and correcting deviation of building broken pillar |
| CN111411650A (en) * | 2020-04-16 | 2020-07-14 | 上海长凯岩土工程有限公司 | Building jacking deviation rectifying method |
| CN112554250A (en) * | 2020-12-28 | 2021-03-26 | 兰州理工大学 | Pile foundation building micro composite steel pipe pile underpinning inclination correcting structure and construction method thereof |
| CN212835550U (en) * | 2020-07-07 | 2021-03-30 | 广东华科大建筑技术开发有限公司 | Frame construction jacking deviation correcting system |
-
2021
- 2021-10-25 CN CN202111238468.0A patent/CN113882443B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1165234A (en) * | 1996-05-15 | 1997-11-19 | 广州市鲁班建筑防水补强专业公司 | Method for jacking and correcting deviation of building broken pillar |
| DE19648648A1 (en) * | 1996-11-18 | 1997-04-24 | Bertold Domasch | Method of stabilising and raising tower-like structures positioned at an angle |
| CN111411650A (en) * | 2020-04-16 | 2020-07-14 | 上海长凯岩土工程有限公司 | Building jacking deviation rectifying method |
| CN212835550U (en) * | 2020-07-07 | 2021-03-30 | 广东华科大建筑技术开发有限公司 | Frame construction jacking deviation correcting system |
| CN112554250A (en) * | 2020-12-28 | 2021-03-26 | 兰州理工大学 | Pile foundation building micro composite steel pipe pile underpinning inclination correcting structure and construction method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115341778A (en) * | 2022-08-16 | 2022-11-15 | 广东中青建筑科技有限公司 | Building rectification column node reinforcing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113882443B (en) | 2022-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2064393B1 (en) | Partially prefabricated modular foundation system | |
| US7108458B1 (en) | Interlocking slab leveling system | |
| CN109137762B (en) | Method for reinforcing wave-shaped arch plate double-curved arch bridge | |
| CN102839601A (en) | Fixed connection structure for steel pier column and cushion cap of portal rigid frame overbridge and construction method of fixed connection structure | |
| CN107044142B (en) | Adjustable reinforcement deviation correcting method and structure for reducing uneven settlement of house | |
| CN108005401A (en) | A kind of support and change method of the column of existing frame structure base isolation reinforcement | |
| CN112227234B (en) | Construction method for lifting and transforming bridge | |
| CN106245670B (en) | Exposed steel column base construction method | |
| CN113882443B (en) | Unidirectional deviation rectifying method for building | |
| CN109024288B (en) | Method for erecting steel truss girder by using precast concrete shoveling mat | |
| CN209855277U (en) | Conversion layer structure for underground added layer of existing building | |
| CN108643213B (en) | Construction method of underwater bearing platform construction structure | |
| CN114164764A (en) | Construction method for high-fill bridge bearing platform structure | |
| US10450715B2 (en) | Powered lifting station for and method for lifting a slab foundation | |
| CN115828381A (en) | Power distribution room foundation design method convenient for correcting inclination | |
| CN113846714B (en) | Method for repairing and reinforcing raft foundation | |
| CN113266019B (en) | Construction method of foundation pit steel pipe support system | |
| CN115506419A (en) | Seamless leakage-proof construction method for basement exterior wall | |
| CN211772879U (en) | Spacing top of steel case roof beam hoist and mount pushes away construction structures | |
| CN211872669U (en) | Uneven jacking system of current bridge superstructure | |
| CN114293564A (en) | Construction method for foundation pit slope pile foundation of building engineering on site | |
| CN112302066A (en) | Building deviation rectifying structure and deviation rectifying method | |
| CN217128207U (en) | Rotary spraying, reinforcing, lifting and leveling structure for soft soil foundation settlement terrace | |
| CN212358403U (en) | A reinforced structure for bar brick base | |
| CN220117275U (en) | Step precast concrete cutting retaining wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |