CN109083442B - Construction method of dynamic load bearing structure during butt joint of existing building and newly-built foundation - Google Patents
Construction method of dynamic load bearing structure during butt joint of existing building and newly-built foundation Download PDFInfo
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- CN109083442B CN109083442B CN201811195854.4A CN201811195854A CN109083442B CN 109083442 B CN109083442 B CN 109083442B CN 201811195854 A CN201811195854 A CN 201811195854A CN 109083442 B CN109083442 B CN 109083442B
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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
Abstract
A construction method of a dynamic load bearing structure when an existing building is in butt joint with a newly-built foundation comprises the following steps that firstly, construction of supporting columns is carried out simultaneously in the construction process of structural columns of the newly-built box-type foundation; selecting a backfilled material; step three, cleaning the basement bottom plate, and checking and accepting the elevation of the basement; filling the backfill material into the basement, and tamping the backfill material by adopting a water tamping method and a vibrating rod; laying a steel plate on the top surface of the backfill material, and moving a trailer bearing the existing building in place along the steel plate; step six, mounting a temporary steel drum support at the top of the support column; step seven, after the trailer is moved in place, the trailer is jacked by using a jack, and the existing building on the trailer is erected at the top of the temporary steel drum support; step eight, the trailer is landed and moved out; and step nine, excavating the backfill materials for secondary utilization. The invention solves the technical problem that the migration work cannot be smoothly completed when the traditional migration mode is used for migration.
Description
Technical Field
The invention belongs to the field of building construction, and particularly relates to a construction method of a dynamic load bearing structure when an existing building is in butt joint with a newly-built foundation.
Background
Since the 90 s of the last century, in the process of urban transformation, the ancient buildings often run the risk of being dismantled, and the scheme of integrally translating the ancient buildings to a new site is adopted for protecting cultural relics, so that the cultural relics are protected, and the planning requirement of urban transformation is met. In recent years, China is in the process of urbanization accelerated development, the problem of contradiction between civil use, public building and planning land use often occurs, and the construction technology for integrally translating buildings is widely adopted. However, because the migration methods adopted in the process of the integral translation of the building are different, the dynamic load bearing modes adopted when the existing building is in butt joint with the newly-built foundation are different, and the conventional method is the migration mode of trailer moving equipment.
Disclosure of Invention
The invention aims to provide a construction method of a dynamic load bearing structure when an existing building is in butt joint with a newly-built foundation, and aims to solve the technical problems that when a traditional migration mode is adopted for migration, the overall stability and safety of the newly-built foundation structure are low, and the newly-built foundation is often damaged to a certain extent during the migration, so that the migration work cannot be completed smoothly.
In order to achieve the purpose, the invention adopts the following technical scheme.
A construction method of a dynamic load bearing structure when an existing building is in butt joint with a newly-built foundation, wherein the newly-built foundation is a box-type foundation; the construction method comprises the following steps.
Step one, construction of supporting columns is carried out simultaneously in the construction process of the structural columns of the newly-built box type foundation.
And step two, selecting a material for backfilling the newly built box foundation basement.
And step three, cleaning the bottom plate of the basement of the newly built box type foundation and checking and accepting the elevation of the basement.
Filling the backfill material into the basement for layered backfill, and tamping the backfill material by adopting a water tamping method and a vibrating rod to ensure that the backfill material reaches the required compactness.
And step five, after backfilling is finished, laying a steel plate on the top surface of the backfilling material, moving the trailer bearing the existing building in place along the laid steel plate, and bearing the dynamic load of the trailer and the existing building in place by using the backfilling material.
And step six, mounting a temporary steel drum support at the top of the support column in the newly-built box type foundation.
And step seven, after the trailer is moved to be in place, lifting the trailer by using a jack, and erecting the existing building on the trailer on the top of the temporary steel drum support.
And step eight, the trailer is descended and moved out by using the jack.
And step nine, excavating the backfill materials for secondary utilization.
Preferably, structural columns are arranged in the newly-built box-type foundation at intervals along transverse walls on two sides of the newly-built box-type foundation respectively, and the structural columns on the two sides are correspondingly arranged; the inner side and the outer side of each structural column are respectively provided with a supporting column; the top of the support column is higher than that of the structural column and has the same elevation as that of the top of the backfill material after the backfill is designed; and a connecting short beam is connected between each supporting column and the structural column.
Preferably, the material backfilled in the step two is medium coarse sand meeting the design requirement.
Preferably, in the fourth step, backfilling is carried out according to the boundary of the building in a segmented and partitioned manner, the backfilling material is hung on the line and is paved virtually, the thickness of the virtual pavement is controlled within the range of 1000 mm-2000 mm, and the distance between the vibrating rods is not more than 1 m.
Preferably, in the fourth step, the concrete method for tamping the backfill material by the water tamping method and the water tamping with the vibrating rod comprises the following steps: during backfilling, after a layer of backfilling material is paved, water is injected to enable the water injection height to exceed the top surface of the material, and the material is shaken and compacted by a vibrating rod; wherein the range of the distance between the water rammers is 5 m to 10 m.
Preferably, the compactness required in step four is not less than 0.94.
Preferably, in the sixth step, the temporary steel drum support is correspondingly installed on the top of the support column and is connected with the support column by using a chemical anchor bolt.
Compared with the prior art, the invention has the following characteristics and beneficial effects.
1. In the traditional transfer mode of the trailer mobile equipment, because the trailer is heavy, the overall stability and safety of a newly-built foundation structure are low, and the newly-built foundation is often damaged to a certain extent during transfer, the transfer work cannot be smoothly completed; the invention adopts the sand backfill on the newly-built foundation bottom plate and adopts the backfill technology of the water tamping method and the vibrating rod tamping, thereby ensuring the integral stability and safety of the newly-built foundation structure and the existing building and smoothly completing the in-place connection of the existing building and the newly-built foundation.
2. According to the invention, the structural columns are arranged in the newly-built box type foundation at intervals, and the support columns are respectively arranged on the two sides of the structural columns, so that when the existing building is supported on the top of the temporary steel drum support, the load of the existing building is dispersed on the base structure bottom plate through the two support columns and one structural column, and the overall stability of the existing building and the safety of the newly-built foundation are ensured.
3. The construction method adopts river sand which is easy to obtain materials, adopts a dump truck to transport to a construction site, and adopts a forklift to fill backfill materials into the basement to facilitate construction organization.
4. The backfill material in the invention can realize 100% secondary utilization, and greatly saves manpower, material resources and financial resources.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic plan view of the structural columns and support column arrangement of the present invention.
Fig. 2 is a schematic plan view of a structure column and a support column connecting structure according to the present invention.
Fig. 3 is a schematic elevation structure view of the temporary steel drum support arranged on the top of the support column in the invention.
Reference numerals: 1-structural column, 2-support column, 3-temporary steel drum support and 4-connecting short beam.
Detailed Description
In the embodiment, when the existing building and the newly-built foundation are connected in place, the dynamic load of the trailer for carrying the existing building is borne in a mode of tamping and backfilling sand by using a water tamping method and a vibrating rod.
According to the construction method of the dynamic load bearing structure when the existing building is in butt joint with the newly-built foundation, the newly-built foundation is a box-type foundation; the construction method comprises the following steps.
Step one, simultaneously constructing the support columns 2 in the construction process of the structural column 1 of the newly-built box type foundation.
And step two, selecting a material for backfilling the newly built box foundation basement.
And step three, cleaning the basement bottom plate of the newly built box type foundation, removing organic impurities such as garbage, tree roots, templates, weeds and the like from the basement bottom plate, extracting accumulated water and sludge from the pit, checking and accepting the elevation of the basement, cleaning the basement bottom plate, and extracting the accumulated water and the sludge to the checked and accepted elevation of the basement is a prerequisite for smoothly implementing the construction method.
Transporting the backfill material to a construction site by a self-discharging dump truck, filling the backfill material into the basement by a forklift, backfilling in layers, filling water and compacting, and tamping the backfilled material by a water tamping method and a vibrating rod to ensure that the backfill material reaches the required compactness; when one layer is backfilled, the other layer is backfilled after the water ramming layer is qualified; the entry routes and the exit routes of the dump trucks and the forklifts are reasonably organized, and the construction progress is guaranteed.
And step five, after backfilling is finished, laying a steel plate on the top surface of the backfilling material, moving the trailer bearing the existing building in place along the laid steel plate, and bearing the dynamic load of the trailer and the existing building in place by using the backfilling material.
And step six, mounting a temporary steel drum support 3 at the top of the support column 2 in the newly-built box type foundation.
And step seven, after the trailer is moved to the proper position, the trailer is lifted by using a jack, and the existing building on the trailer is erected on the top of the temporary steel drum support 3.
And step eight, the trailer is descended and moved out by using the jack.
And step nine, excavating the backfill materials for secondary utilization, wherein the backfill materials can be recycled by 100 percent after being excavated.
As shown in fig. 1-3, in the present embodiment, structural columns 1 are respectively disposed at intervals in the newly-built box-type foundation along the transverse walls on both sides of the newly-built box-type foundation, and the structural columns 1 on both sides are correspondingly disposed; the inner side and the outer side of each structural column 1 are respectively provided with a support column 2; the top of the support column 2 is higher than that of the structural column 1 and is the same as the top elevation of the backfill material after the backfill is designed; a connecting short beam 4 is connected between each supporting column 2 and the structural column 1.
In the embodiment, the material backfilled in the step two adopts medium coarse sand meeting the design requirements, and the medium coarse sand can be completely recycled for secondary structure and decoration and fitment projects; if backfilling elements are adopted, in places with large rainfall and high rainfall frequency, the backfilling quality is seriously influenced by strong rainfall in the backfilling process, and uneven settlement is easy to occur when a trailer is driven into place; if the broken stones are backfilled, the porosity is high, when a heavy object with 4500 tons is loaded on the trailer and the trailer drives into place, uneven lifting or integral settlement is more easily generated by extrusion among the broken stones; the backfilled medium sand is river sand.
In the fourth step, backfilling is carried out in a segmented and partitioned mode according to the boundary line of the building, the backfilling material is hung on the line and is paved virtually, the thickness of the virtually paved layer is controlled to be within the range of 1000 mm-2000 mm, and the distance between the vibrating rods is not larger than 1 m; in order to ensure the tamping quality, the distance between every two operators in charge of the water tamping is not longer, preferably 5-10 m; the method comprises four keys of layered virtual paving, sufficient water filling, layered tamping and layered checking whether the water tamping quality is ensured; when the water rammer is used for water ramming, the water pump is reasonably arranged according to the field condition, the generated wastewater is timely discharged, and the influence on the structure is avoided.
In the fourth step, the concrete method of tamping the backfill material by the water tamping method and the water tamping with the vibrating rod is as follows: during backfilling, after a layer of backfilling material is paved, water is injected until the water injection height exceeds the top surface of the material, and the material is shaken and compacted by a vibrating rod.
In this embodiment, the compactness required in step four is not less than 0.94.
In the sixth step, the temporary steel drum support 3 is correspondingly installed on the top of the supporting column 2, and is connected with the supporting column 2 by using a chemical anchor bolt, as shown in fig. 3.
The above embodiments are not intended to be exhaustive or to limit the invention to other embodiments, and the above embodiments are intended to illustrate the invention and not to limit the scope of the invention, and all applications that can be modified from the invention are within the scope of the invention.
Claims (6)
1. A construction method of a dynamic load bearing structure during butt joint of an existing building and a newly-built foundation is characterized by comprising the following steps: the newly-built foundation is a box-type foundation; structural columns (1) are respectively arranged in the newly-built box-type foundation along transverse walls on two sides of the newly-built box-type foundation at intervals, and the structural columns (1) on the two sides are correspondingly arranged; the inner side and the outer side of each structural column (1) are respectively provided with a support column (2); the top of the support column (2) is higher than that of the structural column (1) and is the same as the top elevation of the backfill material after the backfill is designed; a connecting short beam (4) is connected between each support column (2) and the structural column (1); the construction method comprises the following steps:
step one, simultaneously constructing support columns (2) in the construction process of a structural column (1) of a newly-built box type foundation;
selecting a material for backfilling the basement of the newly built box type foundation;
step three, cleaning a bottom plate of the basement of the newly built box type foundation, and checking and accepting the elevation of the basement;
filling the backfill material into the basement, carrying out layered backfill, and tamping the backfill material by adopting a water tamping method and a vibrating rod to ensure that the backfill material reaches the required compactness;
step five, after backfilling is finished, laying a steel plate on the top surface of the backfilling material, moving the trailer bearing the existing building in place along the laid steel plate, and bearing the dynamic load of the trailer and the existing building in place by using the backfilling material;
step six, mounting a temporary steel drum support (3) on the top of a support column (2) in the newly-built box type foundation;
step seven, after the trailer is moved to be in place, the trailer is jacked by using a jack, and the existing building on the trailer is erected at the top of the temporary steel drum support (3);
step eight, the trailer is descended and moved out by using a jack;
and step nine, excavating the backfill materials for secondary utilization.
2. The method for constructing a dynamic load bearing structure when an existing building is butted with a newly-built foundation according to claim 1, wherein the material backfilled in the step two is medium coarse sand meeting design requirements.
3. The construction method of a dynamic load bearing structure when an existing building is butted with a newly-built foundation according to claim 1, wherein in the fourth step, backfilling is carried out according to the boundary line of the building in a segmented and partitioned manner, a backfill material is hung on a virtual pavement, the thickness of the virtual pavement is controlled within the range of 1000 mm-2000 mm, and the distance between vibrating rods is not more than 1 m.
4. The construction method of the dynamic load bearing structure when the existing building is butted with the newly-built foundation according to claim 1, wherein in the fourth step, the concrete method of tamping the backfill material by a water tamping method and a vibrating rod water tamping comprises the following steps: during backfilling, after a layer of backfilling material is paved, water is injected to enable the water injection height to exceed the top surface of the material, and the material is shaken and compacted by a vibrating rod; wherein the range of the distance between the water rammers is 5 m to 10 m.
5. The method for constructing a dynamic load bearing structure when an existing building is butted with a newly-built foundation according to claim 1, wherein the compactness required in the fourth step is not less than 0.94.
6. The construction method of the dynamic load bearing structure when the existing building is butted with the newly-built foundation according to the claim 1, characterized in that in the sixth step, the temporary steel drum support (3) is correspondingly installed on the top of the support column (2) and is connected with the support column (2) by adopting a chemical anchor bolt.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811195854.4A CN109083442B (en) | 2018-10-15 | 2018-10-15 | Construction method of dynamic load bearing structure during butt joint of existing building and newly-built foundation |
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| CN201811195854.4A CN109083442B (en) | 2018-10-15 | 2018-10-15 | Construction method of dynamic load bearing structure during butt joint of existing building and newly-built foundation |
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| CN109083442A CN109083442A (en) | 2018-12-25 |
| CN109083442B true CN109083442B (en) | 2020-10-23 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109610882B (en) * | 2018-12-26 | 2020-09-29 | 北京建工四建工程建设有限公司 | Support structure for building translation and construction method thereof |
| CN113802879A (en) * | 2021-09-23 | 2021-12-17 | 山东建筑大学 | Trailer jacking building displacement method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1208103A (en) * | 1998-07-16 | 1999-02-17 | 赵启 | Integral building-translating equipment and method |
| JP2000008623A (en) * | 1998-06-26 | 2000-01-11 | Kajima Corp | Restoration method of structure |
| JP2014040703A (en) * | 2012-08-21 | 2014-03-06 | Leafair Co Ltd | Existent construction ground improvement structure |
| CN105133856A (en) * | 2015-08-14 | 2015-12-09 | 山东建筑大学 | Method for integrally displacing building by utilizing assembly trailer |
| CN205088982U (en) * | 2015-11-10 | 2016-03-16 | 上海先为土木工程有限公司 | Whole on -vehicle system of underpining that shifts of building |
| CN107227862A (en) * | 2017-07-12 | 2017-10-03 | 叶长青 | The gliding construction method of building |
-
2018
- 2018-10-15 CN CN201811195854.4A patent/CN109083442B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000008623A (en) * | 1998-06-26 | 2000-01-11 | Kajima Corp | Restoration method of structure |
| CN1208103A (en) * | 1998-07-16 | 1999-02-17 | 赵启 | Integral building-translating equipment and method |
| JP2014040703A (en) * | 2012-08-21 | 2014-03-06 | Leafair Co Ltd | Existent construction ground improvement structure |
| CN105133856A (en) * | 2015-08-14 | 2015-12-09 | 山东建筑大学 | Method for integrally displacing building by utilizing assembly trailer |
| CN205088982U (en) * | 2015-11-10 | 2016-03-16 | 上海先为土木工程有限公司 | Whole on -vehicle system of underpining that shifts of building |
| CN107227862A (en) * | 2017-07-12 | 2017-10-03 | 叶长青 | The gliding construction method of building |
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