CN116145744A - Jacking deviation correcting construction method based on underpinning pile - Google Patents
Jacking deviation correcting construction method based on underpinning pile Download PDFInfo
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- CN116145744A CN116145744A CN202310260800.6A CN202310260800A CN116145744A CN 116145744 A CN116145744 A CN 116145744A CN 202310260800 A CN202310260800 A CN 202310260800A CN 116145744 A CN116145744 A CN 116145744A
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- 238000009424 underpinning Methods 0.000 title claims abstract description 65
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 40
- 239000010959 steel Substances 0.000 claims description 40
- 230000005540 biological transmission Effects 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 11
- 230000002787 reinforcement Effects 0.000 claims description 9
- 239000011083 cement mortar Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 238000007569 slipcasting Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 239000011800 void material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- 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
- E02D35/005—Lowering or lifting of 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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- 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
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
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- 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
- E02D5/74—Means for anchoring structural elements or bulkheads
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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Abstract
The invention discloses a jacking deviation correcting construction method based on underpinning piles, which comprises the following steps of: forming a pile hole on a foundation of a building, forming a pile below the building through the pile hole, wherein the top of the pile penetrates through the foundation and extends to the upper part of the foundation, and the pile body of the pile is not contacted with the foundation; a jack and a counter-force beam are sequentially installed at the top of the pile, the counter-force beam is fixedly connected with a foundation through an anchor rod, and the load of the foundation is transferred to the pile through the jack by the counter-force beam; lifting the counter-force beam by a jack so that the foundation is lifted to a desired height; after the correction of the building is completed, the foundation and the piles are connected into a whole, meanwhile, the foundation is filled by grouting, and then the jack and the counter-force beam are removed. The construction method does not need to break the wall and the column of the first floor of the building, does not need to carry out underpinning of a jacking system, does not damage an upper structure, and has no difference between the net height of the first floor and the net height before correction.
Description
Technical Field
The invention relates to the jacking deviation rectifying field, in particular to a jacking deviation rectifying construction method based on underpinning piles.
Background
The building deviation correction refers to the fact that the vertical position of a building is deviated due to a certain reason in the existing or construction process, so that the use is seriously affected, and even when the safety is compromised, the correction, the centralizing and reinforcing measures are adopted to recover the normal use functions of the building. There are two common building deviation correcting methods: forced landing deviation correction and jacking deviation correction. The jacking deviation correction means that a plurality of supporting points such as piles are arranged at the position where the settlement of the building is large, and the jacking devices such as jacks are used for lifting the supporting points, so that the settlement of each position of the building is adjusted to achieve the purpose of deviation correction.
The general jacking method needs to be carried out on the first layer broken wall and column of the building, the jacking system is supported and replaced, the upper structure is damaged to a certain extent, the first layer net height is different, and the first layer use experience is affected.
Disclosure of Invention
The invention aims to provide a jacking deviation rectifying construction method based on underpinning piles, which aims to solve the technical problems that the existing jacking method needs to underpinning a jacking system at the first floor of a building, has certain damage to an upper structure, can cause the difference of the net heights of the first floor and affects the use experience of one floor.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
the application provides a jacking deviation correcting construction method based on underpinning pile, which comprises the following steps: forming a pile hole on a foundation of a building, forming a pile below the building through the pile hole, wherein the top of the pile penetrates through the foundation and extends to the upper part of the foundation, and the pile body of the pile is not contacted with the foundation; pouring a newly-added foundation above the foundation, connecting the foundation and the newly-added foundation in a manner of planting ribs, embedding anchor rods in the newly-added foundation, and connecting the foundation, the newly-added foundation and the anchor rods into a whole after the newly-added foundation is solidified; a jack and a counter-force beam are sequentially installed at the top of the pile, the counter-force beam is fixedly connected with the newly added foundation through an anchor rod, and the counter-force beam transfers the load of the foundation and the newly added foundation to the pile through the jack; lifting the counter-force beam by a jack so that the foundation is lifted to a desired height; after the correction of the building is completed, the foundation, the newly added foundation and the piles are connected into a whole, meanwhile, the foundation is filled by grouting, and then the jack and the counter-force beam are removed.
Further, the pile comprises a force-transmitting column and a underpinning pile, and the step of forming the pile below the building comprises: drilling pile holes on the foundations on two sides of a building by adopting a water drill, drilling the pile holes to a designed depth, placing steel pipes or steel reinforcement cages according to site conditions, pouring fine stone concrete or cement mortar into the pile holes, enabling the grouting depth to be close to the bottom of the foundation, forming underpinning piles, installing backing plates on the tops of the underpinning piles, installing force transmission columns on the tops of the backing plates, sleeving the backing plates with the force transmission columns, connecting or welding the backing plates with the force transmission columns, pouring high-strength grouting materials into the jacking transmission columns, and connecting the force transmission columns with the underpinning piles into a whole after the high-strength grouting materials are solidified; wherein, the step of installing the backing plate at the top of underpinning the stake includes: after the underpinning pile is formed, a backing plate is welded at the top of the underpinning pile; or-the backing plate is prefabricated at the top of the underpinning pile when the underpinning pile is formed, and the backing plate is provided with a reserved grouting hole, and high-strength grouting material is filled into the underpinning pile through the grouting hole when the underpinning pile is formed.
Further, the step of forming a new foundation on the foundation includes: drilling pile holes on the foundations on two sides of a building, pouring a newly added foundation on the foundations, connecting the newly added foundation and the foundations into a whole through the planted ribs, avoiding the pile holes when pouring the newly added foundation, and forming piles below the building through the pile holes; or-drilling pile holes on the foundations on two sides of the building, pouring a newly-added foundation on the foundation after forming piles below the building through the pile holes, connecting the newly-added foundation and the foundation into a whole through the planted bars, and avoiding the piles when pouring the newly-added foundation; the step of forming a new foundation on the basis satisfies the following conditions: in the process of lifting the foundation, the foundation and the newly added foundation are not contacted with the pile.
Further, the step of connecting the reaction beam to the anchor rod includes: the through holes through which the anchor rods can pass are reserved in the counter-force beams, the counter-force beams are placed on the jack, the anchor rods pass through the reserved through holes in the counter-force beams, and then nuts are installed on the anchor rods, so that the nuts limit the counter-force beams to move upwards.
Further, the step of lifting the reaction beam by the jack includes: before formal jacking, preloading each underpinning pile sequentially through a force transmission column and a backing plate by using a jack, and then dividing a jacking target according to the height required to be lifted; and during formal jacking, the underpinning pile is used as a fulcrum, the counter-force beam is jacked up through the jack, and the counter-force beam pulls the newly added foundation and the foundation upwards through the anchor rod, so that the aim of lifting the whole foundation is finally achieved.
Further, the step of integrally connecting the foundation, the newly added foundation and the pile comprises: after jacking in place, a first gap is formed between the force transmission column and the newly added foundation, and the foundation, the first gap is sealed by adopting high-strength grouting material, and the force transmission column is connected with the newly added foundation and the foundation into a whole after solidification.
Further, the step of grouting and filling the foundation comprises the following steps: after jacking in place, the newly added foundation, the foundation and the foundation are separated to form a second gap, the second gap is filled tightly by cement mortar, and the newly added foundation, the foundation and the foundation are connected into a whole after solidification.
Further, when a newly-added foundation is poured, an embedded steel plate is embedded into the top of the newly-added foundation, a force transmission column penetrates through a preset through hole in the embedded steel plate, after the newly-added foundation is solidified, the embedded steel plate and the newly-added foundation are connected into a whole, and before the jack and the counter-force beam are removed, the force transmission column and the embedded steel plate are welded into a whole.
Further, before removing the jack and the counter-force beam, the channel steel is placed at the top of the newly added foundation, the force transmission column, the channel steel and the embedded steel plate are welded into a whole, and then the counter-force beam and the jack are removed.
Further, after the counter-force beam and the jack are removed, the part of the force transmission column higher than the channel steel is cut off, and a hole sealing cover plate is covered on the outer side of the channel steel.
The application also provides another jacking deviation rectifying construction method based on the underpinning pile, which comprises the following steps: forming a pile hole on a foundation of a building, forming a pile below the building through the pile hole, wherein the top of the pile penetrates through the foundation and extends to the upper part of the foundation, and the pile body of the pile is not contacted with the foundation; the method comprises the steps that a jack and a counter-force beam are sequentially installed at the top of a pile, the counter-force beam and a foundation are connected into a whole in a reinforcement planting mode, and the counter-force beam transfers the load of the foundation to the pile through the jack; lifting the counter-force beam by a jack so that the foundation is lifted to a desired height; after the correction of the building is completed, the foundation and the piles are connected into a whole, meanwhile, the foundation is filled by grouting, and then the jack and the counter-force beam are removed.
The application also provides another jacking deviation rectifying construction method based on the underpinning pile, which comprises the following steps: pouring a newly added foundation on the foundations on two sides of a building, connecting the foundation and the newly added foundation in a manner of planting ribs, and embedding anchor rods in the newly added foundation; after the newly added foundation is solidified, pile holes are drilled on the newly added foundation and the foundation, piles are formed below the building through the pile holes, the tops of the piles penetrate through the foundation and extend to the upper side of the foundation, and the pile bodies of the piles are not contacted with the foundation; a jack and a counter-force beam are sequentially installed at the top of the pile, the counter-force beam is fixedly connected with the newly added foundation through an anchor rod, and the counter-force beam transfers the load of the foundation and the newly added foundation to the pile through the jack; lifting the counter-force beam by a jack so that the foundation is lifted to a desired height; after the correction of the building is completed, the foundation, the newly added foundation and the piles are connected into a whole, meanwhile, the foundation is filled by grouting, and then the jack and the counter-force beam are removed.
Compared with the prior art, the application has the following beneficial effects:
the jacking deviation rectifying construction method based on the underpinning pile is characterized in that piles are formed below a building, then the foundation of the building is jacked upwards directly through the piles, the foundation and the piles are connected after jacking in place, deviation rectifying of the building is achieved, the first layer of the building is not required to be broken, the jacking system is not required to be underpinned, the upper structure is not damaged, and the net height of the first layer is not different from that before deviation rectifying.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
FIG. 1 is a block diagram of a jacking system according to embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of the lifting process of embodiment 1 of the present invention;
fig. 3 is a schematic diagram of a pile sealing structure after the jacking in embodiment 1 of the present invention;
FIG. 4 is a schematic view of the connecting nodes of the force transfer column, the backing plate and the underpinning pile along the longitudinal section direction of the pile in the embodiment 1 of the present invention;
FIG. 5 is a schematic view of the connecting nodes of the force transfer column, the backing plate and the underpinning pile along the cross section direction of the pile in embodiment 1 of the present invention;
reference numerals in the drawings are respectively as follows:
1-a load-bearing structure; 2-a counterforce beam; 3-anchor rods; 4-jack; 5-a second backing plate; 6-adding a foundation; 7-foundation; 8-a force transmission column; 9-pile backing and pile replacement; 10-backing plate; 11-hole sealing cover plates; 12-channel steel; 13-embedding a steel plate; 14-a first void; 15-a second void; 16-foundation; 17-a steel pipe; 18-reserving grouting holes.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The existing jacking method is used in building deviation correction, the wall and column are required to be broken at the first floor of the building, a jacking system is used for underpinning, a certain damage is caused to an upper structure, the first floor net height is different, and one-floor use experience is affected.
In order to avoid the problems, the present embodiment provides three examples of a jacking deviation rectifying method based on underpinning piles.
Example 1:
as shown in fig. 1, pile holes are formed in a foundation 7 of a building, piles are formed below the building through the pile holes, the tops of the piles penetrate through the foundation and extend above the foundation 7, and pile bodies of the piles are not in contact with the foundation 7;
a newly added foundation 6 is poured above the foundation 7, the foundation 7 and the newly added foundation 6 are connected in a bar planting mode, meanwhile, an anchor rod 3 is embedded in the newly added foundation 6, and after the newly added foundation 6 is solidified, the foundation 7, the newly added foundation 6 and the anchor rod 3 are connected into a whole;
a jack 4 and a counter-force beam 2 are sequentially arranged at the top of the pile, the counter-force beam 2 is fixedly connected with a newly added foundation 6 through an anchor rod 3, and the counter-force beam transfers loads of the foundation 7 and the newly added foundation 6 to the pile through the jack 4;
the jacking system for jacking the building can be formed through the steps;
then, as shown in fig. 2, the reaction beam 2 is lifted by the jack 4 so that the foundation 7 is lifted to a desired height;
after the correction of the building is completed, the foundation 7, the newly added foundation 6 and the piles are connected into a whole, meanwhile, the foundation 16 is filled with grouting, and then the jack 4 and the counter-force beam 2 are removed.
Also to be described is:
the pile holes are arranged as close as possible to the load-bearing structure 1 of the building, the load-bearing structure 1 being a column or a wall, the pile holes being arranged on both sides of the column or the wall.
The bottom of stock 3 is located the junction of newly-increased basis 6 and basis 7, and the top of stock 3 is located the top of newly-increased basis 6.
The top of the force transmission column 8 is welded with a second backing plate 5, and the jack 4 is placed on the second backing plate 5.
Specifically, the step of forming piles under a building includes:
drilling pile holes on foundations 7 on two sides of a building by adopting a water drill, drilling the pile holes to a designed depth, placing a steel pipe 17 or a steel reinforcement cage according to field conditions, filling fine stone concrete or cement mortar into the pile holes, wherein the height of the steel pipe 17 or the steel reinforcement cage inserted into the foundations 7 is 50-100 mm, setting the depth of the grouting is close to the bottom of the foundations 7, connecting the fine stone concrete or the cement mortar with the steel pipe 17 or the steel reinforcement cage into a whole after setting, thereby forming a underpinning pile 9, installing a backing plate 10 on the top of the underpinning pile 9, installing a force transmission column 8 on the top of the backing plate 10, connecting or welding the backing plate 10 with the force transmission column 8 in a threading manner, simultaneously filling high-strength grouting material into the jacking force transmission column 8, and connecting the force transmission column 8 with the underpinning pile 9 into a whole after setting the high-strength grouting material;
as shown in fig. 4 and 5, the step of installing the pad 10 on top of the underpinning pile 9 comprises:
after the underpinning pile 9 is formed, a backing plate 10 is welded at the top of the underpinning pile 9;
or- (or)
The backing plate 10 is prefabricated at the top of the underpinning pile 9 when the underpinning pile 9 is formed, and a reserved grouting hole 18 is formed in the backing plate 10, and high-strength grouting material is filled into the underpinning pile 9 through the grouting hole 18 when the underpinning pile 9 is formed.
Specifically, the step of forming the newly added foundation 6 on the foundation 7 includes:
after pile holes are drilled on foundations 7 on two sides of a building by adopting water, pouring a newly added foundation 6 on the foundations 7, connecting the newly added foundation 6 and the foundations 7 into a whole through the planted bars, avoiding the pile holes when pouring the newly added foundation 6, and forming piles below the building through the pile holes;
or- (or)
Drilling pile holes on foundations on two sides of a building by adopting water, pouring a newly-added foundation 6 on the foundation after forming piles below the building through the pile holes, connecting the newly-added foundation 6 and the foundation 7 into a whole through planting ribs, and avoiding the piles when pouring the newly-added foundation 6;
the step of forming the additional foundation 6 on the foundation 7 satisfies the following conditions: in the process of lifting the foundation 7, the foundation 7 and the newly added foundation 6 are not contacted with the piles.
Specifically, the step of connecting the reaction beam with the anchor rod includes:
the through holes through which the anchor rods 3 can pass are reserved in the counter-force beams 2, the counter-force beams 2 are placed on the jacks 4, the anchor rods 3 pass through the reserved through holes in the counter-force beams 2, and then nuts are installed on the anchor rods 3, so that the nuts limit the counter-force beams 2 to move upwards.
Specifically, the step of lifting the reaction beam 2 by the jack 4 includes:
the jack 4 sequentially preloads each underpinning pile 9 through the force transmission column 8 and the backing plate 10 until the formal jacking begins;
before jacking, jacking targets are divided according to the height required to be lifted, for example, the total lifting is required to be 20cm, 15 jacking is designed to be completed, the jacking targets are lifted for 2cm for the first 5 times each time, and the jacking targets are lifted for 1cm for the last 10 times each time;
when in jacking, the underpinning pile 9 is used as a fulcrum, the counter-force beam 2 is jacked upwards through the jack 4, the counter-force beam 2 pulls the newly added foundation 6 and foundation 7 upwards through the anchor rod 3, and finally the purpose of lifting the whole foundation is achieved;
specifically, the step of connecting the foundation 7, the newly added foundation 6 and the pile into a whole includes:
a first gap 14 is formed between the force transmission column 8 and the newly added foundation 6 and the foundation 7, a second gap 15 of the first gap 14 is sealed by adopting high-strength grouting material, and the solidified force transmission column 8 is connected with the newly added foundation 6 and the foundation 7 into a whole.
Specifically, the grouting and filling steps of the foundation 16 include:
after jacking in place, the newly added foundation 6, the foundation 7 and the foundation 16 are separated to form a second gap 15, the second gap 15 is filled with cement mortar tightly, and the newly added foundation 6, the foundation 7 and the foundation 16 are connected into a whole after solidification.
Optionally:
as shown in fig. 3, when the newly added foundation 6 is poured, an embedded steel plate 13 is embedded in the top of the newly added foundation 6, the force transmission column 8 passes through a preset through hole on the embedded steel plate 13, and after the newly added foundation 6 is solidified, the embedded steel plate 13 and the newly added foundation 6 are connected into a whole;
before the jack 4 and the counter-force beam 2 are removed, the force transmission column 8 and the embedded steel plate 13 are welded into a whole.
Optionally:
as shown in fig. 3, before removing the jack 4 and the counter-force beam 2, a channel steel 12 is placed on top of the newly added foundation 6, the force transmission column 8, the channel steel 12 and the embedded steel plate 13 are welded into a whole, then the counter-force beam 2 and the jack 4 are removed, the part of the force transmission column 8 higher than the channel steel 12 is cut off, and meanwhile, a hole sealing cover plate 11 is covered on the outer side of the channel steel 12.
Example 2 (not shown):
forming a pile hole on a foundation 7 of a building, forming a pile below the building through the pile hole, wherein the top of the pile penetrates through the foundation and extends to the upper part of the foundation 7, and the pile body of the pile is not contacted with the foundation 7;
a jack 4 and a counter-force beam 2 are sequentially arranged at the top of the pile, the counter-force beam 2 and a foundation 7 are connected into a whole in a reinforcement planting mode, and the counter-force beam transfers the load of the foundation 7 to the pile through the jack 4;
lifting the reaction beam 2 by means of the jack 4 so that the foundation 7 is lifted to a desired height;
after the correction of the building is completed, the foundation 7 and the piles are connected into a whole, meanwhile, the foundation 16 is filled with grouting, and then the jack 4 and the counter-force beam 2 are removed.
Example 3 (not shown):
pouring a newly added foundation 6 on the foundations 7 on two sides of the building, connecting the foundation 7 with the newly added foundation 6 in a reinforcement planting mode, and embedding anchor rods 3 in the newly added foundation 6;
after the newly added foundation 6 is solidified, pile holes are drilled on the newly added foundation 6 and the foundation 7 by using water drills, piles are formed below the building through the pile holes, the tops of the piles penetrate through the foundation and extend to the upper side of the foundation 7, and the pile bodies of the piles are not contacted with the foundation 7;
a jack 4 and a counter-force beam 2 are sequentially arranged at the top of the pile, the counter-force beam 2 is fixedly connected with a newly added foundation 6 through an anchor rod 3, and the counter-force beam transfers loads of the foundation 7 and the newly added foundation 6 to the pile through the jack 4;
lifting the reaction beam 2 by means of the jack 4 so that the foundation 7 is lifted to a desired height;
after the correction of the building is completed, the foundation 7, the newly added foundation 6 and the piles are connected into a whole, meanwhile, the foundation 16 is filled with grouting, and then the jack 4 and the counter-force beam 2 are removed.
The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this invention will occur to those skilled in the art, and it is intended to be within the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. The jacking deviation correcting construction method based on the underpinning pile is characterized by comprising the following steps of:
forming a pile hole on a foundation of a building, forming a pile below the building through the pile hole, wherein the top of the pile penetrates through the foundation and extends to the upper part of the foundation, and the pile body of the pile is not contacted with the foundation;
pouring a newly-added foundation above the foundation, connecting the foundation and the newly-added foundation in a manner of planting ribs, embedding anchor rods in the newly-added foundation, and connecting the foundation, the newly-added foundation and the anchor rods into a whole after the newly-added foundation is solidified;
a jack and a counter-force beam are sequentially installed at the top of the pile, the counter-force beam is fixedly connected with the newly added foundation through an anchor rod, and the counter-force beam transfers the load of the foundation and the newly added foundation to the pile through the jack;
lifting the counter-force beam by a jack so that the foundation is lifted to a desired height;
after the correction of the building is completed, the foundation, the newly added foundation and the piles are connected into a whole, meanwhile, the foundation is filled by grouting, and then the jack and the counter-force beam are removed.
2. The jacking deviation correcting construction method based on underpinning pile according to claim 1, wherein,
the pile comprises a force transferring column and a underpinning pile, and the step of forming the pile below the building comprises the following steps:
drilling pile holes on the foundations on two sides of a building by adopting a water drill, drilling the pile holes to a designed depth, placing steel pipes or steel reinforcement cages according to site conditions, pouring fine stone concrete or cement mortar into the pile holes, enabling the grouting depth to be close to the bottom of the foundation, forming underpinning piles, installing backing plates on the tops of the underpinning piles, installing force transmission columns on the tops of the backing plates, sleeving the backing plates with the force transmission columns, connecting or welding the backing plates with the force transmission columns, pouring high-strength grouting materials into the jacking transmission columns, and connecting the force transmission columns with the underpinning piles into a whole after the high-strength grouting materials are solidified;
wherein, the step of installing the backing plate at the top of underpinning the stake includes:
after the underpinning pile is formed, a backing plate is welded at the top of the underpinning pile;
or- (or)
The backing plate is prefabricated at the top of underpinning pile when underpinning pile formation to be provided with on the backing plate and reserve the slip casting hole, when underpinning pile formation, pour into the high-strength grouting material to the inside of underpinning pile through the slip casting hole.
3. The jacking deviation correcting construction method based on underpinning pile according to claim 1, wherein,
the step of forming a new foundation on the foundation comprises:
drilling pile holes on the foundations on two sides of a building, pouring a newly added foundation on the foundations, connecting the newly added foundation and the foundations into a whole through the planted ribs, avoiding the pile holes when pouring the newly added foundation, and forming piles below the building through the pile holes;
or- (or)
Drilling pile holes on the foundations on two sides of a building by adopting water, pouring a newly-added foundation on the foundation after forming piles below the building through the pile holes, connecting the newly-added foundation and the foundation into a whole through planting ribs, and avoiding the piles when pouring the newly-added foundation;
the step of forming a new foundation on the basis satisfies the following conditions: in the process of lifting the foundation, the foundation and the newly added foundation are not contacted with the pile.
4. The jacking deviation correcting construction method based on underpinning pile according to claim 1, wherein,
the step of connecting the counter-force beam with the anchor rod comprises:
the through holes through which the anchor rods can pass are reserved in the counter-force beams, the counter-force beams are placed on the jack, the anchor rods pass through the reserved through holes in the counter-force beams, and then nuts are installed on the anchor rods, so that the nuts limit the counter-force beams to move upwards.
5. The jacking deviation correcting construction method based on underpinning pile according to claim 1, wherein,
the step of lifting the counter-force beam by the jack comprises the following steps:
before formal jacking, preloading each underpinning pile sequentially through a force transmission column and a backing plate by using a jack, and then dividing a jacking target according to the height required to be lifted;
and during formal jacking, the underpinning pile is used as a fulcrum, the counter-force beam is jacked up through the jack, and the counter-force beam pulls the newly added foundation and the foundation upwards through the anchor rod, so that the aim of lifting the whole foundation is finally achieved.
6. The jacking deviation correcting construction method based on underpinning pile according to claim 1, wherein,
the step of connecting the foundation, the newly added foundation and the pile into a whole comprises the following steps:
after jacking in place, a first gap is formed between the force transmission column and the newly added foundation, and the foundation, the first gap is sealed by adopting high-strength grouting material, and the force transmission column is connected with the newly added foundation and the foundation into a whole after solidification.
7. The jacking deviation correcting construction method based on underpinning pile according to claim 1, wherein,
the foundation grouting filling step comprises the following steps:
after jacking in place, the newly added foundation, the foundation and the foundation are separated to form a second gap, the second gap is filled tightly by cement mortar, and the newly added foundation, the foundation and the foundation are connected into a whole after solidification.
8. The jacking deviation correcting construction method based on underpinning pile according to claim 1, wherein,
when a newly-added foundation is poured, an embedded steel plate is embedded into the top of the newly-added foundation, a force transmission column penetrates through a preset through hole in the embedded steel plate, after the newly-added foundation is solidified, the embedded steel plate and the newly-added foundation are connected into a whole, and before a jack and a counter-force beam are removed, the force transmission column and the embedded steel plate are welded into a whole.
9. The jacking deviation correcting construction method based on underpinning pile according to claim 8, wherein,
before the jack and the counter-force beam are removed, the channel steel is placed at the top of the newly added foundation, the force transmission column, the channel steel and the embedded steel plate are welded into a whole, and then the counter-force beam and the jack are removed.
10. The jacking deviation correcting construction method based on underpinning pile according to claim 9, characterized in that,
after the counter-force beam and the jack are removed, the part of the force transmission column higher than the channel steel is cut off, and a hole sealing cover plate is covered on the outer side of the channel steel.
11. The jacking deviation correcting construction method based on the underpinning pile is characterized by comprising the following steps of:
forming a pile hole on a foundation of a building, forming a pile below the building through the pile hole, wherein the top of the pile penetrates through the foundation and extends to the upper part of the foundation, and the pile body of the pile is not contacted with the foundation;
the method comprises the steps that a jack and a counter-force beam are sequentially installed at the top of a pile, the counter-force beam and a foundation are connected into a whole in a reinforcement planting mode, and the counter-force beam transfers the load of the foundation to the pile through the jack;
lifting the counter-force beam by a jack so that the foundation is lifted to a desired height;
after the correction of the building is completed, the foundation and the piles are connected into a whole, meanwhile, the foundation is filled by grouting, and then the jack and the counter-force beam are removed.
12. The jacking deviation correcting construction method based on the underpinning pile is characterized by comprising the following steps of:
pouring a newly added foundation on the foundations on two sides of a building, connecting the foundation and the newly added foundation in a manner of planting ribs, and embedding anchor rods in the newly added foundation;
after the newly added foundation is solidified, pile holes are drilled on the newly added foundation and the foundation, piles are formed below the building through the pile holes, the tops of the piles penetrate through the foundation and extend to the upper side of the foundation, and the pile bodies of the piles are not contacted with the foundation;
a jack and a counter-force beam are sequentially installed at the top of the pile, the counter-force beam is fixedly connected with the newly added foundation through an anchor rod, and the counter-force beam transfers the load of the foundation and the newly added foundation to the pile through the jack;
lifting the counter-force beam by a jack so that the foundation is lifted to a desired height;
after the correction of the building is completed, the foundation, the newly added foundation and the piles are connected into a whole, meanwhile, the foundation is filled by grouting, and then the jack and the counter-force beam are removed.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118110217A (en) * | 2024-04-29 | 2024-05-31 | 四川省建筑科学研究院有限公司 | Existing building foundation reinforcement structure and reinforcement method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118110217A (en) * | 2024-04-29 | 2024-05-31 | 四川省建筑科学研究院有限公司 | Existing building foundation reinforcement structure and reinforcement method |
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