CN115450470A - Underpinning method for jacking - Google Patents
Underpinning method for jacking Download PDFInfo
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- CN115450470A CN115450470A CN202211226586.4A CN202211226586A CN115450470A CN 115450470 A CN115450470 A CN 115450470A CN 202211226586 A CN202211226586 A CN 202211226586A CN 115450470 A CN115450470 A CN 115450470A
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- 238000009424 underpinning Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 133
- 239000010959 steel Substances 0.000 claims abstract description 133
- 230000000149 penetrating effect Effects 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000004568 cement Substances 0.000 claims abstract description 7
- 238000005553 drilling Methods 0.000 claims abstract description 6
- 238000009412 basement excavation Methods 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 description 12
- 238000010276 construction Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 235000019994 cava Nutrition 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/06—Separating, lifting, removing of buildings; Making a new sub-structure
- E04G23/065—Lifting of buildings
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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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- General Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Foundations (AREA)
Abstract
The invention discloses a underpinning method for jacking, wherein foundation excavation is carried out on two sides of a jacking object; drilling holes in the foundation of the bottom of the jacking object, and installing bottom-penetrating steel pipes in each drilling hole; mounting H-shaped steel beams on two sides of a jacking object, and supporting the bottoms of the H-shaped steel beams by adopting hydraulic jacks; the inclined web members and the longitudinal horizontal rods are installed on the H-shaped steel beam, the end parts of the two longitudinal horizontal rods arranged along the height direction of the jacking object are respectively connected with the upper part and the middle part of the vertical rod, the end parts of the inclined web members are connected with the bottom of the vertical rod, the end parts of the bottom penetrating steel pipes are connected with the bottom of the vertical rod, the upper transverse horizontal rod and the lower transverse horizontal rod are respectively connected with the top and the bottom of the vertical rod, and the pull rod, the cross braces and the vertical rod are connected. H-shaped steel beams, bottom-penetrating steel pipes, vertical rods, longitudinal horizontal rods and oblique web members form a stressed truss, and transverse horizontal rods, pull rods and cross braces connect trusses; pre-jacking after the cement-based grouting material in the gap between the bottom-penetrating steel pipe and the hole wall reaches the strength; and separating the bottom penetrating steel pipe from the ground foundation and then jacking.
Description
Technical Field
The invention belongs to the technical field of displacement protection, and particularly relates to a underpinning method for jacking.
Background
At present, in many fields, a plurality of weights need to be displaced, for example, existing Buddha figures made of stone, bronze, wood and other materials are generally used, and the Buddha figures are often long in history and have high cultural relic protection value; at present, the statues of the cultural relics are often required to be shifted due to the change of venues, the change of layouts and the like. The displacement is to change the spatial position of the displacement object through certain engineering technical means under the condition of keeping the integrity of the displacement object, and the displacement comprises single displacement such as translation, climbing, lifting, rotating, steering and the like and combined displacement. The displacement object is lifted before the displacement object is displaced, namely, the statue of Buddha of the cultural relic base is separated from the original foundation, and then the next displacement operation can be carried out. The current common practice in practical engineering is as follows: after the cultural relic Buddha statue is wrapped by the soft cushion layer, the cultural relic Buddha statue is directly bound by the rope and then lifted. The disadvantages of this approach are: bind the back with the historical relic statue of buddha, directly lift by two ropes, the main stress point of historical relic statue of buddha concentrates on hoisting point department, and the atress is inhomogeneous, and because mechanical davit and historical relic statue of buddha stress point are not on a vertical plane at the in-process of lifting by crane, can produce the swing after lifting by crane, and the produced inertial force of swing can increase the atress of historical relic statue of buddha. The method for hoisting easily causes the hoisted objects to be damaged, especially, the damaged statue of Buddha of the cultural relics is easy to have disastrous results, and the case that some statues of Buddha of the cultural relics have accidents in the process of displacement is rare. The lifting of the Buddha image of the heavier cultural relic needs large-scale hoisting machinery, and if the hoisting machinery is positioned in small spaces such as indoor spaces and caves, the hoisting machinery cannot enter the space often, and the lifting cannot be completed. Therefore, a lifting method is needed to stably lift the cultural relic Buddha figure, so that the cultural relic Buddha figure is uniformly stressed and can be constructed in a narrow space.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an underpinning method for jacking, which is realized by underpinning a steel frame, the underpinning steel frame can separate a jacking object from a foundation, the jacking object transmits force to the underpinning steel frame through an original base, the jacking object is uniformly stressed in the jacking process and cannot shake, the steel frame for jacking can be installed on site, and construction can be carried out in small and small spaces such as rooms and caves.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the embodiment of the invention provides a underpinning method for jacking, which comprises the following steps:
foundation excavation is carried out on two sides of the jacking object so as to ensure the operation space required by construction;
drilling a foundation of a jacking object through a drill hole, wherein the diameter of the drill hole is about 50mm larger than that of the bottom penetrating steel pipe, and the distance between the drill holes is equal to that between the bottom penetrating steel pipes;
a plurality of bottom penetrating steel pipes are installed in each drill hole in sequence, cement-based grouting materials are poured into gaps between the bottom penetrating steel pipes and the drill holes, and no relative deformation exists between the steel pipes and the hole walls and between the steel pipes in the jacking process;
installing H-shaped steel beams on the ground on two sides of a jacking object, arranging stiffening ribs on the H-shaped steel beams, arranging a base plate at the bottom of the H-shaped steel beams, and adopting a hydraulic jack to support the bottom of the H-shaped steel beams;
installing an inclined web member and a longitudinal horizontal rod on the H-shaped steel beam; the end parts of two longitudinal horizontal rods arranged along the height direction of a jacking object are respectively connected with the upper part and the middle part of a vertical rod, the end part of an inclined web member is connected with the bottom of the vertical rod, the end part of a bottom penetrating steel pipe is connected with the bottom of the vertical rod, an upper transverse horizontal rod and a lower transverse horizontal rod are connected with the vertical rod, and a pull rod and a shear brace are also connected with the vertical rod; h-shaped steel beams, bottom-penetrating steel pipes, vertical rods, longitudinal horizontal rods and oblique web members form a truss frame, and transverse horizontal rods, pull rods and cross braces connect the truss frames to form a stable structural system;
after the cement-based grouting material in the gap between the bottom-penetrating steel pipe and the hole wall reaches the designed strength, pre-jacking by using a hydraulic jack, wherein the jacking force can be 0.5-0.8 times of the total weight of the jacking object and the base;
cutting the base of the jacking object by using a wire saw under the bottom penetrating steel pipe so as to separate the base from the base in the jacking process;
and jacking the jacking object by adopting a hydraulic jack.
The embodiment of the invention has the following beneficial effects:
1. the underpinning steel frame penetrates through the base foundation of the jacking object, the base can be separated from the base at the bottom of the jacking object, the underpinning steel frame directly underpins the base, so that the base is uniformly stressed, and compared with hoisting, the jacking object does not directly bear force but passes through the base to the underpinning steel frame, so that the jacking object is protected;
2. the underpinning steel frame consists of H-shaped steel, rectangular pipes and steel pipes, can be installed and spliced on site, has low requirement on construction operation space, can be constructed in small and small spaces such as indoor spaces, caves and the like, and has wide application range;
3. when the jacking object is jacked up by the underpinning steel frame, the process is stable, no shaking is generated, and the jacking object is protected;
4. the invention depends on the underpinning steel frame which is made of steel, has simple structure composition, is convenient and quick to install and disassemble and saves the construction period. The rod pieces formed by the brackets can be repeatedly recycled in different projects, and materials are saved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic view of a top coordinate level of a jacking object according to the present invention;
FIG. 2 is a schematic plan view of a base elevation below a jacking object base according to the present invention;
FIG. 3 isbase:Sub>A schematic cross-sectional view taken along line A-A of FIG. 1;
FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 1;
FIG. 5 is a schematic cross-sectional view taken at C-C of FIG. 1;
FIG. 6 is a schematic view of the H-shaped steel beam of the present invention.
In the figure: 1-H-shaped steel beam, 2-longitudinal horizontal rod, 3-bottom penetrating steel pipe, 4-diagonal web member, 5-vertical rod, 6-transverse horizontal rod, 7-shear brace, 8-pull rod, 9-hydraulic jack, 10-foundation, 11-stiffening rib, 12-base plate, 13-base and 14-jacking object.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "front", "rear", "left" and "right" in the present invention, if any, merely indicate correspondence with the rear, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, and do not indicate or imply that the equipment or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the invention.
The specific meaning of the above terms in the present invention can be understood by a person in a specific case.
As mentioned in the background, the present invention provides a underpinning method for jacking in order to solve the above technical problems.
In a typical embodiment of the present invention, as shown in fig. 1 to 6, the present embodiment takes jacking up a statue of Buddha as an example to explain the method provided by the present invention, which is as follows:
the embodiment provides a method for jacking a cultural relic Buddha figure, which is mainly realized by underpinning a steel frame, and comprises the following specific implementation steps:
step 3, drilling the foundation at the bottom of the statue of Buddha of the cultural relic by using a water drill, wherein the diameter of a plurality of finally formed drill holes is about 50mm larger than that of the bottom-penetrating steel pipe, and the distance between the drill holes is the same as that of the bottom-penetrating steel pipe; it should be noted that the drill holes may be arranged along the width direction of the figure of Buddha, or may be arranged along the length direction, specifically designed according to the construction space on site, and preferably, a plurality of drill holes are arranged along the length direction of the figure of Buddha;
Then, the stressed trusses on the two sides of the cultural relic Buddha figure are connected through two pull rods arranged in front and at the back, the left vertical rod and the right vertical rod which are positioned in front of the cultural relic Buddha figure are connected through a cross-arranged cross brace, and the left vertical rod and the right vertical rod which are positioned behind the cultural relic Buddha figure are connected through a cross-arranged cross brace;
and 8, after the cement-based grouting material in the gap between the bottom penetrating steel pipe and the hole wall reaches the designed strength, pre-jacking by using a hydraulic jack, wherein the jacking force can be 0.5-0.8 times of the total weight of the statue of Buddha of the cultural relic and the base.
and step 10, jacking the statue of Buddha of the cultural relic by adopting a hydraulic jack.
The key technology of the method for jacking the cultural relic Buddha statue is that in order to realize jacking the cultural relic Buddha statue, a bottom penetrating steel pipe is introduced to penetrate through the foundation under the cultural relic Buddha statue base so as to support the cultural relic Buddha statue and the weight of the base, and an H-shaped steel beam, a longitudinal horizontal rod, an inclined web member, a vertical rod and a bottom penetrating steel pipe are further introduced to be welded to form a stress truss to bear the cultural relic Buddha statue and the weight of the base together, so that the stress is more reasonable and effective. And further introducing a transverse horizontal rod, a pull rod, a cross brace and a stressed truss to be connected, so that the stability of the stressed truss is improved, and a underpinning steel frame is formed together. The weight of the statue of Buddha of the cultural relic can be transferred to the underpinning steel frame through the base, and the H-shaped steel beam in the underpinning steel frame can be jacked by adopting a hydraulic jack, thereby realizing the jacking of the statue of Buddha of the cultural relic. The reinforcing ribs are arranged in pairs in the steel beams at the jacking part of the hydraulic jack and used for resisting the action of concentrated force. The contact position of the hydraulic jack and the lower flange of the steel beam is provided with the backing plate, so that the stress is more uniform and reasonable. The underpinning steel frames are of truss structures, the bottom penetrating steel pipes are main stress rod pieces of the trusses, and the underpinning steel frames on the front side and the rear side of the statue of the cultural relic are of symmetrical structures. The lower foundation of the bottom penetrating steel pipe can be separated from the base by the aid of the rope saw.
Furthermore, the implementation of the method for jacking the cultural relic Buddha figure is mainly realized by depending on the underpinning steel frame. The underpinning steel frame consists of an H-shaped steel beam, a bottom penetrating steel pipe, a vertical rod, a longitudinal horizontal rod, an inclined web member, a transverse horizontal rod, a pull rod and a cross brace. H-shaped steel beams, bottom-penetrating steel pipes, vertical rods, longitudinal horizontal rods and oblique web members form a truss which is mainly stressed, and transverse horizontal rods, pull rods and cross braces connect the trusses to form a stable structural system. The reinforcing ribs are arranged in pairs in the steel beams at the jacking part of the hydraulic jack and used for resisting the action of concentrated force. The contact position of the hydraulic jack and the lower flange of the steel beam is provided with the backing plate, so that the stress is more uniform and reasonable. The space, span and rod type of each truss of the main stressed truss can be determined according to the size and weight of the jacking object.
Furthermore, the H-shaped steel beams are positioned at two ends of the underpinning steel frame, two steel beams are respectively arranged at each end, the steel beams are connected with the longitudinal horizontal rods and the inclined web members through welding, and the steel beams are main stress rod members in the truss. The steel beam can be H-shaped steel, lattice steel beams, rectangular pipes, square pipes and the like, and the type of the steel beam can be determined according to the weight of a jacking object and the arrangement of jacking points. The jacking point is positioned at the lower part of the steel beam, and the two sides of the steel beam at the jacking point are provided with stiffening ribs in pairs to resist the action of concentrated force. The stiffening rib can be only arranged at the jacking point for 2-3 times, and can also be arranged in a full span manner so as to adjust the jacking point, and the thickness of the stiffening rib is determined by the magnitude of the concentrated force of the jacking point. A base plate is welded on a lower flange of the steel beam at the jacking point, the base plate can be square, the side length is equal to the width of the steel beam, and the thickness can be 16-25 mm. The position of the jacking point can be determined according to the weight distribution of the jacking object, the model of the steel beam and the arrangement of the displacement structure.
Furthermore, the bottom penetrating steel pipe is generally a seamless steel pipe, and is connected with the diagonal web members, the vertical rods and the transverse horizontal rods through welding. The hole is drilled to form a round hole, and the steel pipe can be better combined with the hole wall and is better stressed. The bottom penetrating steel pipes directly support the jacking object base, are main stress components, determine intervals according to base materials and jacking object weight, are dense if the base bearing capacity is low or the statue of Buddha of the cultural relics is heavy, and can be sparse if the base bearing capacity is high or the statue of Buddha of the cultural relics is light. If necessary, the bottom-penetrating steel pipes can be arranged among trusses, and two ends of each bottom-penetrating steel pipe are connected with the transverse horizontal rods.
Further, the horizontal bars in this embodiment are divided into longitudinal horizontal bars and transverse horizontal bars. The longitudinal horizontal rods, the oblique web members, the bottom penetrating steel pipes and the H-shaped steel beams form stress trusses which are truss rod members, and the transverse horizontal rods are connected with the stress trusses and mainly play a role in drawing and connecting, so that the out-of-plane stability of the main stress trusses is improved. The horizontal rods can be seamless steel tubes, rectangular tubes, section steel and the like, the types of the longitudinal horizontal rods are mainly determined according to stress, and the types of the transverse horizontal rods are determined according to construction requirements.
The vertical rods, the longitudinal horizontal rods, the inclined web members, the bottom penetrating steel pipes and the H-shaped steel beams form a main stress truss which is a truss rod piece and can be seamless steel pipes, rectangular pipes, section steel and the like, and the type of the truss is determined by stress calculation.
The cross braces and the pull rods can be made of seamless steel tubes, rectangular tubes, profile steel and the like, the main function is to increase the in-plane stability of the truss, and the type of the truss is determined by construction requirements.
The bottom penetrating steel pipe adopts a seamless steel pipe, vertical rods and horizontal rods and inclined web members can adopt rectangular pipes in consideration of construction and stress factors, and the rod members are connected by welding.
It is further noted that the present invention is exemplified as a top-up cultural relic Buddha figure, which can also be applied to top-up buildings, structures, sculptures, industrial equipment or heavier instruments, etc.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The underpinning method for jacking is characterized by comprising the following steps of:
performing foundation excavation on two sides of the jacking object;
drilling through a foundation at the bottom of the jacking object by drilling a plurality of drill holes;
sequentially installing a bottom penetrating steel pipe in each drill hole, and pouring cement-based grouting materials into gaps between the bottom penetrating steel pipes and the drill holes;
h-shaped steel beams are arranged on two sides of a jacking object, stiffening ribs are arranged on the H-shaped steel beams, a base plate is arranged at the bottom of the H-shaped steel beams, and a hydraulic jack is adopted for supporting the bottom of the base plate;
installing an inclined web member and a longitudinal horizontal rod on the H-shaped steel beam; the end parts of two longitudinal horizontal rods arranged along the height direction of a jacking object are respectively connected with the upper part and the middle part of a vertical rod, the end part of an inclined web member is connected with the bottom of the vertical rod, the end part of a bottom penetrating steel pipe is connected with the bottom of the vertical rod, an upper transverse horizontal rod and a lower transverse horizontal rod are respectively connected with the top and the bottom of the vertical rod, and a pull rod and a cross brace are also connected with the vertical rod; h-shaped steel beams, bottom-penetrating steel pipes, vertical rods, longitudinal horizontal rods and oblique web members form a main stressed truss, and transverse horizontal rods, pull rods and cross braces connect the trusses to form a stable structural system;
after the cement-based grouting material in the gap between the bottom-penetrating steel pipe and the hole wall reaches the designed strength, pre-jacking by adopting a hydraulic jack;
separating the bottom penetrating steel pipe from the ground foundation;
and jacking the jacking object by adopting a hydraulic jack.
2. The underpinning method for jacking up as claimed in claim 1, wherein the bottom penetrating steel pipe is seamless steel pipe and is connected with the diagonal web members, the vertical rods and the horizontal rods through welding.
3. The underpinning method for jacking up as claimed in claim 1, wherein the diameter of the drilled hole is 50mm larger than the diameter of the bottom-penetrating steel pipe.
4. The underpinning method for jacking as claimed in claim 1, wherein the jacking force of said hydraulic jack is 0.5-0.8 times of total weight of the jacking object.
5. The underpinning method for jacking up as claimed in claim 1, wherein two H-shaped steel beams are respectively arranged on two sides of the jacking object.
6. The underpinning method for jacking as claimed in claim 5, wherein a plurality of hydraulic jacks are provided at the bottom of each H-shaped steel beam.
7. The underpinning method for jacking as claimed in claim 1, wherein the stiffening ribs are arranged in pairs at both sides of the H-shaped steel beam at the lifting point.
8. The underpinning method for jacking up as claimed in claim 1, wherein said drilled hole is a circular hole.
9. The underpinning method for jacking up as claimed in claim 1, wherein said longitudinal horizontal bar and transverse horizontal bar are seamless steel pipe, rectangular pipe or section steel.
10. The underpinning method for jacking up as claimed in claim 1, wherein said vertical bar, said shear brace or said pull bar is seamless steel pipe, rectangular pipe or section steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211226586.4A CN115450470A (en) | 2022-10-09 | 2022-10-09 | Underpinning method for jacking |
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| CN202211226586.4A CN115450470A (en) | 2022-10-09 | 2022-10-09 | Underpinning method for jacking |
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