CN111058539A - Building jacking underpinning device and method - Google Patents
Building jacking underpinning device and method Download PDFInfo
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- CN111058539A CN111058539A CN202010034067.2A CN202010034067A CN111058539A CN 111058539 A CN111058539 A CN 111058539A CN 202010034067 A CN202010034067 A CN 202010034067A CN 111058539 A CN111058539 A CN 111058539A
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- 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
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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
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
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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
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/20—Placing by pressure or pulling power
Abstract
The jacking underpinning device comprises a tray beam and a plurality of jacking underpinning structures, wherein the tray beam surrounds the periphery of the bottom of a building foundation wall body and is used for supporting a protective building; each jacking underpinning structure comprises an anchor rod static pressure pile, a jacking counter-force beam, a jacking steel upright post and a jack, wherein the jacking steel upright post and the jacking steel beam form a jacking frame, the jacking counter-force beam and the anchor rod static pressure pile form a counter-force supporting system, in the jacking stage, the jack pulls the jacking steel upright post through the jacking steel beam and pulls the tray beam to jack synchronously, and the jacking counter-force beam provides counter-force support for the jack and transmits force to the anchor rod static pressure pile; in the stage of replacing the lower cushion block of the jack, the hydraulic jack and the following jack replace the lower cushion block in turn; and repeating the operations until the building reaches the designed jacking height. The device can realize that the building can complete jacking and underpinning at plus or minus 0.000 without replacing the outer vertical face of the building, and is safe and stable.
Description
Technical Field
The invention belongs to the technical field of building underpinning, and particularly relates to a building jacking underpinning device and method.
Background
In recent years, with the advance of city updating construction such as city planning and transformation, city old transformation and the like, protective buildings are often influenced by construction of peripheral deep foundation pits, and in addition, the protective buildings are weak in structure for a long time, so that the protective buildings are easy to be damaged in different degrees such as uneven settlement, inclination and the like.
In addition, the space under the protective building still needs to be developed and utilized in the transformation process. Therefore, the planning and modification of the protective building not only needs to meet the requirement of upper bearing capacity, but also needs to meet the requirements of underground space development and use.
The integral jacking technology of the building can well solve the problems. The technology can not only protect the protective building in situ, can develop underground space after jacking in place according to planning requirements, but also can temporarily or permanently reinforce the protective building in the jacking construction process, and achieves the effects of 'repairing old as old and reinforcing and prolonging the service life'.
The underpinning of the building is the most important key technology for the whole jacking of the building. The traditional underpinning mode of buildings is that the external vertical surface is not damaged, and underpinning structures are all constructed below +/-0.000 and generally consist of an upper tray structure, a jacking device and a lower chassis structure. When the excavation of peripheral deep foundation pits or the influence of development and utilization of underground spaces are influenced, the underpinning mode with the construction below +/-0.000 has the following technical defects: (1) the height of the underpinning structure is about 1.5 meters, a basement and the like need to be newly made in the underground space of the protective building, and the arrangement of the underpinning structure inevitably conflicts with the development of the underground space; (2) the protective building is long in age, the foundation burial depth is shallow, when the underground water level of the region is shallow, the traditional underpinning structure is adopted, earth excavation is deep, the foundation soil layer is disturbed, meanwhile, precipitation work needs to be done in the whole jacking process, and the control of the uneven settlement of the protective building and the economical efficiency of jacking transformation are not good.
Disclosure of Invention
Aiming at the defects or shortcomings of the prior art, the invention aims to solve the technical problem of how to finish jacking and underpinning on plus or minus 0.000 of a building on the premise of not damaging the outer facade of the building.
In order to solve the technical problems, the application provides a building jacking underpinning device which comprises a tray beam and a plurality of jacking underpinning structures, wherein the tray beam surrounds the periphery of the bottom of a building foundation wall body and is used for supporting a protective building;
each jacking underpinning structure comprises an anchor rod static pressure pile, a jacking counter-force beam, a jacking steel upright and a jack;
the anchor rod static pressure pile is vertically arranged, penetrates through a pile hole in the tray beam, the lower end of the anchor rod static pressure pile is arranged at the base part of the building, the upper end of the anchor rod static pressure pile is higher than the tray beam and is fixedly connected with a jacking counter-force beam which is arranged right above the tray beam and transversely, the jacking steel beam is transversely arranged right above the jacking counter-force beam, the jack is placed between the jacking counter-force beam and the jacking steel beam, the jacking steel upright post is vertically arranged close to the anchor rod static pressure pile, the lower end of the jacking steel upright post is fixedly connected with the tray beam, and the upper end;
when the jack is jacked, the jacking counter-force beam provides counter-force support for the jack, the jacking steel beam is lifted upwards along with jacking of the jack, and then the tray beam is pulled through the jacking steel upright post, and the building is driven to be lifted upwards synchronously.
Furthermore, the anchor rod static pressure piles are divided into two groups, and the two groups of anchor rod static pressure piles are symmetrically arranged on two sides of the building foot; the jacking steel stand column is divided into two groups, the two groups of jacking steel stand columns are symmetrically arranged, and each group of jacking steel stand column is arranged on the outer side of the anchor rod static pressure pile positioned on the same side.
Further, the jack comprises a hydraulic jack and two following jacks, and the two following jacks are respectively placed on two sides of the hydraulic jack.
Furthermore, a full-stroke self-locking thread is arranged in the hydraulic jack.
Further, the jacking underpins the device and still includes the stiffening rib board, the stiffening rib board sets up the jacking atress point department at the jacking girder steel.
Furthermore, a steel plate is embedded in the tray beam and is connected with the jacking steel upright column in an anchoring mode through a high-strength bolt.
Furthermore, a transverse rib plate and a longitudinal rib plate are arranged in the jacking steel upright post to enhance the rigidity of the jacking steel upright post.
Further, jacking steel stand and jacking girder steel are through full weld mode fixed connection.
Furthermore, jacking reaction beam, jacking girder steel and jacking steel stand are H shaped steel mosaic structure.
On the other hand, the application also provides a building jacking and underpinning method, which comprises the following steps:
s1, pouring tray beams around the wall of the building foundation to enable the top elevation of the tray beams to be less than +/-0.000;
s2, the anchor rod static pressure pile passes through a pile hole reserved on the tray beam, so that the bottom of the anchor rod static pressure pile is buried in the foundation, and the head of the anchor rod static pressure pile is higher than the tray beam;
s3, sequentially mounting a jacking reaction beam, a jacking steel upright post and a jacking steel beam;
s3, a jack is arranged between the jacking reaction beam and the jacking steel beam;
and S4, controlling the jack to jack, wherein during jacking of the jack, the jacking reaction beam provides reaction support for the jack, the jacking steel beam is lifted upwards along with jacking of the jack, and the jacking steel upright posts pull the tray beam and drive the building to be lifted upwards synchronously.
Compared with the prior art, the method has the following technical effects:
1. the tray beam is used around the bottom of the building foundation wall body in the application and used for supporting the building, so that the building is jacked along with the tray beam, jacking and underpinning of the building are completed within plus or minus 0.000, and the outer vertical face of the building is not damaged.
2. The construction of the tray beam of this application is below 0.000, and the tray beam can regard as the tray of whole building in the construction stage, and the foundation beam of building can be regarded as in the service phase, need not to demolish, saves construction cost.
3. Use jacking steel stand and jacking girder steel to constitute the jacking frame of building jacking in this application, use jacking reaction roof beam and stock static pressure pile to constitute the counter-force support system that the building promoted, under the jacking effect of jack and the dead weight of building, accomplish the building jacking, the complete equipment biography power is clear and definite, stable in structure.
4. The hydraulic jack in this application uses to follow the jack and follows the protection in the jacking stage, and fundamentally has eliminated dangerous condition such as outage, hydraulic jack internal drainage and has taken place.
5. Jacking counter-force roof beam, jacking girder steel and jacking steel stand in this application all adopt steel mosaic structure, demolish the convenience, can reuse, save construction cost.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1: the structure elevation schematic diagram of the jacking underpinning device in one embodiment of the application;
FIG. 2: FIG. 1 is a schematic elevation view of a connecting structure of a jacking steel column and a pallet beam;
FIG. 3: FIG. 1 is a schematic plan view of a connecting structure of a jacking steel upright column and a pallet beam;
the anchor rod static pressure pile comprises an anchor rod static pressure pile 1, a tray beam 2, a pre-buried steel plate 3, a high-strength bolt 4, a jacking steel upright post 5, a jacking counter-force beam 6, a following jack 7, a stiffening rib plate 8, a hydraulic jack 9, a jacking steel beam 10, a longitudinal rib plate 11 and a transverse rib plate 12.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be further described in conjunction with the accompanying drawings so that the objects, features, and effects of the present invention can be fully understood, and it should be noted that the words "front", "rear", "left", "right", "upper", "lower", "bottom", and "top" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" refer to the directions toward and away from the geometric center of a specific part, respectively.
In an embodiment of the application, a building jacking underpinning device is provided, which comprises a tray beam 2 and a plurality of jacking underpinning structures, wherein the tray beam 2 surrounds the periphery of the bottom of a building foundation wall body and is used for supporting a protective building;
fig. 1 is a schematic elevation view of one of the jacking underpinning structures in the above embodiments. Each jacking underpinning structure comprises an anchor rod static pressure pile 1, a jacking steel upright post 5, a jacking counter-force beam 6, a jacking steel beam 10 and a jack;
the anchor rod static pressure pile 1 is vertically arranged, the anchor rod static pressure pile 1 penetrates through a pile hole in the tray beam 2, the lower end of the anchor rod static pressure pile 1 is arranged at the base part of a building, the upper end of the anchor rod static pressure pile 1 is higher than the tray beam 2, the anchor rod static pressure pile 1 is fixedly connected with a jacking counter-force beam 6 which is positioned right above the anchor rod static pressure pile 1 and transversely arranged, the jacking steel beam 10 is transversely arranged right above the jacking counter-force beam 6, a jack is placed between the jacking counter-force beam 6 and the jacking steel beam 10, the jacking steel upright post 5 is vertically arranged close to the anchor rod static pressure pile 1, the lower end of the jacking steel upright post 5 is fixedly connected with the;
when the jack is jacked, the jacking counter-force beam 6 provides counter-force support for the jack, the jacking steel beam 10 is lifted upwards along with jacking of the jack, and then the tray beam 2 is pulled through the jacking steel upright post 5, and the building is driven to be lifted upwards synchronously.
The tray beam 2 consists of a wall clamping beam, a column holding beam and a connecting beam, and commonly bears the building load and improves the integral vertical rigidity of the building. The wall clamping beams surround the periphery of the foundation wall body, and when the wall body is blocked, the wall clamping beams are dug and penetrated into a whole; the column holding beam surrounds the reinforced concrete column; the connecting beam is connected with the wall clamping beam and forms a plane frame stress system with the column holding beam; the tray beam 2 is arranged around the building foundation wall body, so that the upper structure load of the building is completely supported and replaced on the tray beam 2. The pallet beam 2 is of a concrete structure, and pile holes are reserved during cast-in-place construction.
The tray beam 2 surrounds the periphery of the bottom of the building foundation wall body and is used for supporting the building, so that the building is jacked along with the tray beam 2, jacking and underpinning of the building are completed within plus or minus 0.000, and the outer vertical face of the building is not replaced.
The anchor rod static pressure pile 1 can effectively solve the problems of excessive settlement and uneven settlement of the whole building. The anchor rod static pressure pile 1 is arranged close to two sides of a foundation large foot as much as possible, the anchor rod static pressure pile 1 is a pile foundation construction process formed by combining an anchor rod and a static pressure pile, the anchor rod is embedded in the foundation to fix a pile pressing frame, the self weight of a building is used as the counter force of the pile pressing, and a jack is used for pressing pile sections into the foundation section by section from a pile hole reserved on an upper tray beam 2. The diameter of the anchor static pile 1 is required to meet the requirement of bearing capacity, and as a preferred embodiment, the anchor static pile is formed by welding a plurality of single sections, and each single section is 2 meters in length.
And the jacking counter-force beam 6 is in full-welding connection with the anchor rod static pressure pile 1. In the embodiment of the application, the jacking reaction beam 6 is transversely arranged above the anchor rod static pressure pile 1 and forms a jacking reaction supporting system with the anchor rod static pressure pile 1. The jacking counter-force beam 6 is used as a supporting structure of the jack and transmits the force of the jack to the anchor rod static pressure pile 1.
And two ends of the jacking steel upright post 5 are respectively connected with the tray beam 2 and the jacking steel beam 10. In the building jacking stage, the jacking steel upright post 5 mainly bears the tension. Jacking girder steel 10 and jacking steel stand 5 form the jacking frame through full weld welded connection. The full-length welding connection mode can bear bending moment and certain tensile force.
Preferably, the jacking steel beams 10 and the jacking reaction beams 6 are spliced by using HM (medium-flange H-section steel), the height and width of the HM (medium-flange H-section steel) are 550mm by 300mm, the jacking pillars are spliced by using HW (wide-flange H-section steel), and the height and width of the HW (wide-flange H-section steel) are 400mm by 400 mm.
In each jacking underpinning structure, the jacking steel upright post 5 and the jacking steel beam 10 form a jacking framework for jacking the building, the jacking counter-force beam 6 and the anchor static pressure pile 1 form a counter-force supporting system for lifting the building, and the jacking of the building is completed under the jacking action of the jack and the self weight of the building. The whole jacking underpinning device has definite force transmission and stable structure.
In one embodiment of the application, the anchor rod static pressure piles 1 are divided into two groups, and the two groups of anchor rod static pressure piles 1 are symmetrically arranged on two sides of a building foot; the jacking steel upright posts 5 are divided into two groups, the two groups of jacking steel upright posts 5 are symmetrically arranged, and each group of jacking steel upright posts 5 are arranged on the outer side of the anchor rod static pressure pile 1 positioned on the same side. In a preferred embodiment shown in fig. 1, two anchor static piles 1 are arranged close to the left and right sides of the foot of the foundation, two jacking steel columns 5 are arranged, one jacking steel column 5 is arranged on the left side of the anchor static pile 1, and the other jacking steel column 5 is arranged on the right side of the anchor static pile 1.
The jack is installed between jacking reaction beam 6 and jacking girder steel 10, provides the jacking power for the building jacking.
In an embodiment of the present application, each jack of the jacking and underpinning structure comprises one hydraulic jack 9 and two following jacks 7, the two following jacks 7 are respectively placed on two sides of the hydraulic jack 9. Wherein, the hydraulic jack 9 adopts a hydraulic driving mode to provide jacking force; the following jack 7 adopts a mechanism driven by a hydraulic driving machine to follow, and when the hydraulic jack 9 jacks up, the following jack 7 actively follows, so that the real-time following protection effect is achieved.
As a preferred choice of this embodiment, a full-stroke self-locking thread is provided in the hydraulic jack 9, and the full-stroke self-locking thread can be used for screwing a self-locking nut when a pad is replaced, so that the hydraulic jack 9 can be locked. In addition, the balance protection load balancing valve in the hydraulic jack 9 is of a leakage-free cone valve structure and has 4 main functions, the first function is to balance the load pressure of the hydraulic jack 9, so that the hydraulic jack 9 with load descending can not slide down after losing pressure, and a workpiece can not fall off even if an oil pipe is broken; the second function is to protect the hydraulic jack 9 from overload, when the pressure in the hydraulic jack 9 exceeds the set pressure, the load balancing valve can be automatically opened, and the over-high oil pressure is discharged, so that the load of the hydraulic jack 9 is balanced. The load balancing valve is in plate connection and can be directly arranged on the hydraulic jack 9, so that the trouble caused by an external pipeline is reduced to the maximum extent; the third function is an oil inlet speed regulation function, so that the great influence of overlarge switching hydraulic fluctuation on the load when the system is synchronously lifted and synchronously landed is avoided; and fourthly, when a plurality of hydraulic jacks 9 with balance valves support a heavy load at the same time, when synchronous descending is required, the hydraulic jack 9 with a large load is firstly opened (the heavy load is firstly opened), and the reliable synchronous descending function of the system is really ensured.
The following jack 7 is driven by a hydraulic motor to automatically follow the mechanical screw, is stressed by the mechanical screw (rigidly stressed), is reliable in stress and free of risk, and when the hydraulic jack 9 jacks up, the following jack 7 can be protected in real time and can not support a hydraulic system when an accident occurs, so that mechanical self-locking is realized. The mechanical jack which can actively load dozens of tons of pre-jacking force at the maximum along with the jack 7 (similar to the principle of a hydraulic stretcher, a screw rod is screwed down again after the pre-jacking force is generated), so that the deformation and the installation clearance of the steel supporting cushion block can be eliminated. The danger sources of power failure, internal leakage of the hydraulic jack, damage of hydraulic seal, computer control or failure of electronic elements and the like are fundamentally and thoroughly solved, and the protection of practical significance is realized. In addition, tens of tons of pretightening force can be actively loaded to the maximum extent by the following jack 7 (similar to the principle of a hydraulic stretcher, the screw is screwed down again after the pretightening force is generated), and the deformation and the installation clearance of the steel supporting cushion block can be eliminated.
In the jacking underpinning device that this application provided, hydraulic jack 9 and the cooperation of following jack 7 are used, can all realize the auto-lock when changing the cushion alone atress at hydraulic jack 9 and following jack 7, have prevented to have cut a power failure, the hydraulic jack is interior to let out, hydraulic seal damages, computer control or electronic component emergence such as break down, have promoted the safety and stability of a whole set of jacking underpinning device.
In the embodiment of this application, hydraulic jack 9 and follow jack 7 and act on jacking girder steel 10, increase stiffening rib plate 8 in the jacking stress point department of jacking girder steel 10, improve the stability and the antitorque performance of jacking girder steel 10, as an optimization, three stiffening rib plates 8 are arranged to every jacking point, 9 totally.
In addition, as shown in fig. 2 and 3, a transverse rib 12 and a longitudinal rib 11 are provided in the jacking steel column 5 to reinforce the rigidity of the jacking steel column 5.
In an embodiment of this application, the tray roof beam 2 leaves the pre-buried hole when being under construction, and the pre-buried steel sheet 3 in the pre-buried hole of tray roof beam 2 is connected jacking steel stand 5 and the anchor of tray roof beam 2 through high strength bolt 4.
In an embodiment of this application, as an optimization, jacking reaction roof beam 6, jacking girder steel 10 and jacking steel stand 5 are H shaped steel mosaic structure, demolish the convenience, and reuse rate is high, saves construction cost.
The working mechanism of the building jacking and underpinning is that in the jacking stage, a hydraulic jack 9 pulls a jacking steel upright post 5 through a jacking steel beam 10 and simultaneously pulls a tray beam 2 to jack synchronously, a jacking counter-force beam 6 provides counter-force support for the jack, force is transmitted to an anchor rod static pressure pile 1, and a following jack 7 adopts a hydraulic drive machine to follow the active following in real time; in the stage of replacing a cushion block at the lower part of the following jack 7, after the hydraulic jack 9 jacks for a stroke, rotating a pressure maintaining ring at the head part of the hydraulic jack 9 to enable the pressure maintaining ring to be in close contact with the supporting cushion block to protect hydraulic pressure, retracting a cylinder by the following jack 7, and adding the supporting cushion block at the lower part of the following jack 7; in the stage of replacing a cushion block at the lower part of the hydraulic jack 9, replacing the cushion block along with the jack 7, pressurizing and discharging the cylinder, completely converting the structural load of the upper part of the protective building from the hydraulic jack 9 to the following jack 7, maintaining pressure and mechanically self-locking, retracting the cylinder by the hydraulic jack 9, and adding a support cushion block at the lower part of the hydraulic jack 9; and repeating the operations until the designed jacking height is reached.
The building jacking underpinning method using the jacking underpinning device can complete the jacking underpinning of the building, and the method specifically comprises the following steps:
s1, the tray beam 2 is poured around the wall of the building foundation, and the top elevation of the tray beam 2 is enabled to be less than +/-0.000. Preferably, the top level of the tray beam 2 is controlled to be 5cm below the indoor floor. Chiseling the surfaces of the wall body and the two sides of the column of the building foundation to be jacked and replaced, successively erecting a formwork and pouring a wall clamping beam, a column embracing beam and a connecting beam to form a plane tray beam system structure. Pile holes and pre-buried holes are reserved on the tray beam 2;
s2, the anchor rod static pressure pile 1 penetrates through a pile hole reserved on the tray beam 2, so that the bottom of the anchor rod static pressure pile 1 is buried in the foundation, and the head of the anchor rod static pressure pile 1 is higher than the tray beam 2;
s3, sequentially mounting a jacking reaction beam 6, a jacking steel upright 5 and a jacking steel beam 10;
s3, a jack is arranged between the jacking reaction beam 6 and the jacking steel beam 10;
and S4, controlling the jack to jack, wherein during jacking of the jack, the jacking reaction beam 6 provides reaction support for the jack, the jacking steel beam 10 is lifted upwards along with jacking of the jack, and then the tray beam 2 is pulled through the jacking steel upright post 5 to drive the building to be lifted upwards synchronously.
The above embodiments are merely to illustrate the technical solution of the present invention, not to limit the same, and the present invention has been described in detail with reference to the preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made without departing from the spirit and scope of the present invention and it should be understood that the present invention resides in the claims hereinafter appended.
Claims (10)
1. A building jacking underpinning device is characterized by comprising a tray beam and a plurality of jacking underpinning structures, wherein the tray beam surrounds the periphery of the bottom of a building foundation wall body and is used for supporting a protective building; each jacking underpinning structure comprises an anchor rod static pressure pile, a jacking counter-force beam, a jacking steel upright and a jack;
the anchor rod static pressure pile is vertically arranged, penetrates through a pile hole in the tray beam, the lower end of the anchor rod static pressure pile is arranged at the base part of the building, the upper end of the anchor rod static pressure pile is higher than the tray beam and is fixedly connected with a jacking counter-force beam which is arranged right above the tray beam and transversely, the jacking steel beam is transversely arranged right above the jacking counter-force beam, the jack is placed between the jacking counter-force beam and the jacking steel beam, the jacking steel upright post is vertically arranged close to the anchor rod static pressure pile, the lower end of the jacking steel upright post is fixedly connected with the tray beam, and the upper end;
when the jack is jacked, the jacking counter-force beam provides counter-force support for the jack, the jacking steel beam is lifted upwards along with jacking of the jack, and then the tray beam is pulled through the jacking steel upright post, and the building is driven to be lifted upwards synchronously.
2. The building jacking and underpinning device as claimed in claim 1, wherein the anchor rod static pressure piles are divided into two groups, and the two groups of anchor rod static pressure piles are symmetrically arranged on two sides of a building foot; the jacking steel stand column is divided into two groups, the two groups of jacking steel stand columns are symmetrically arranged, and each group of jacking steel stand column is arranged on the outer side of the anchor rod static pressure pile positioned on the same side.
3. The building jacking and underpinning device as claimed in claim 1, wherein said jacks include one hydraulic jack and two following jacks, said two following jacks being respectively placed on both sides of the hydraulic jack.
4. The building jacking and underpinning device as claimed in claim 3, wherein a full-stroke self-locking thread is arranged in the hydraulic jack.
5. The building jacking underpinning device as claimed in claim 1, further comprising a stiffening rib plate, wherein the stiffening rib plate is arranged at the jacking stress point of the jacking steel beam.
6. The building jacking underpinning device of claim 1, wherein steel plates are embedded in the tray beam and are connected with the jacking steel upright posts in an anchoring manner through high-strength bolts.
7. The building jacking underpinning device as claimed in claim 1, wherein a transverse rib plate and a longitudinal rib plate are arranged in the jacking steel upright to reinforce the rigidity of the jacking steel upright.
8. The building jacking underpinning device according to claim 1, wherein the jacking steel upright post is fixedly connected with the jacking steel beam in a full-welded connection mode.
9. The building jacking underpinning device according to claim 1, wherein the jacking reaction beam, the jacking steel beam and the jacking steel upright post are H-shaped steel splicing structures.
10. A building jacking underpinning method is characterized by comprising the following steps:
s1, pouring tray beams around the wall of the building foundation to enable the top elevation of the tray beams to be less than +/-0.000;
s2, the anchor rod static pressure pile passes through a pile hole reserved on the tray beam, so that the bottom of the anchor rod static pressure pile is buried in the foundation, and the head of the anchor rod static pressure pile is higher than the tray beam;
s3, sequentially mounting a jacking reaction beam, a jacking steel upright post and a jacking steel beam;
s3, a jack is arranged between the jacking reaction beam and the jacking steel beam;
and S4, controlling the jack to jack, wherein during jacking of the jack, the jacking reaction beam provides reaction support for the jack, the jacking steel beam is lifted upwards along with jacking of the jack, and the jacking steel upright posts pull the tray beam and drive the building to be lifted upwards synchronously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010034067.2A CN111058539A (en) | 2020-01-13 | 2020-01-13 | Building jacking underpinning device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010034067.2A CN111058539A (en) | 2020-01-13 | 2020-01-13 | Building jacking underpinning device and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112962670A (en) * | 2021-02-19 | 2021-06-15 | 济南轨道交通集团有限公司 | Underground pipe gallery in-situ protection method |
| CN113513185A (en) * | 2021-07-19 | 2021-10-19 | 上海建工一建集团有限公司 | Structural integral jacking transformation device and construction method thereof |
| CN113683002A (en) * | 2021-08-24 | 2021-11-23 | 上海先为土木工程有限公司 | Synchronous falling protection system following jack and control method |
-
2020
- 2020-01-13 CN CN202010034067.2A patent/CN111058539A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112962670A (en) * | 2021-02-19 | 2021-06-15 | 济南轨道交通集团有限公司 | Underground pipe gallery in-situ protection method |
| CN113513185A (en) * | 2021-07-19 | 2021-10-19 | 上海建工一建集团有限公司 | Structural integral jacking transformation device and construction method thereof |
| CN113683002A (en) * | 2021-08-24 | 2021-11-23 | 上海先为土木工程有限公司 | Synchronous falling protection system following jack and control method |
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