CN114575370A - High-low span foundation structure and construction method - Google Patents
High-low span foundation structure and construction method Download PDFInfo
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- CN114575370A CN114575370A CN202210348617.7A CN202210348617A CN114575370A CN 114575370 A CN114575370 A CN 114575370A CN 202210348617 A CN202210348617 A CN 202210348617A CN 114575370 A CN114575370 A CN 114575370A
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- 238000010276 construction Methods 0.000 title claims abstract description 54
- 239000004567 concrete Substances 0.000 claims abstract description 57
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 230000002787 reinforcement Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000011065 in-situ storage Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000011440 grout Substances 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 238000007569 slipcasting Methods 0.000 description 7
- 238000005056 compaction Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E02D27/00—Foundations as substructures
- E02D27/01—Flat 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
- E02D27/00—Foundations as substructures
- E02D27/01—Flat foundations
- E02D27/013—Shuttering specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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Abstract
The application relates to a high-low span foundation structure, which belongs to the field of building engineering and comprises a foundation layer, a cushion layer and a raft plate layer; the foundation layer comprises a high-span area, a low-span area and a connecting slope; the cushion is laid on the high-span area, the low-span area and the surface connected with the slope; the raft layer is including the height that is located high trans-regional top stride a layer raft and be located the low trans-regional top of low trans-regional top and stride a layer raft, the high trans-regional one end of orientation is striden to the height of a layer raft and is extended to the low top of striding a layer raft, the low trans-layer raft is striden to be connected to each other through the connecting portion of vertical setting with the height and is striden between the one end that a layer raft extends to low trans-layer raft top, the high trans-layer raft, it pours the chamber to connect to form one between domatic and the connecting portion, be provided with on the high trans-layer raft and pour the inside grout mouth that intracavity portion is linked together, the inside of pouring the chamber is filled up with cast in situ concrete structure. The application also discloses a construction method of the high-low span foundation structure. The method has the effect of shortening the construction period of the high-low span foundation.
Description
Technical Field
The application relates to the field of building construction, in particular to a high-low span foundation structure and a construction method.
Background
Some foundation bottom plates have different use functions and have height fall difference so as to form a high-low span foundation structure, and the high-low span foundation structure is mostly formed by pouring concrete during construction, so that the low span and the high span are usually constructed twice during construction of the high-low span foundation structure.
According to the existing construction method, the high-low span foundation structure should be constructed with the low span firstly, namely, the high span is constructed after the low span is completely backfilled. The structure on the high-span layer can only be subjected to high-span construction after the ground span construction is finished, so that the whole construction period is long.
Disclosure of Invention
In order to shorten the construction period of a high-low span foundation, the application provides a high-low span foundation structure and a construction method.
The application provides a basic structure is striden to height adopts following technical scheme:
a high-low span foundation structure comprises a foundation layer, a cushion layer and a raft slab layer positioned above the cushion layer;
the foundation layer comprises a high-span region, a low-span region and a connecting slope surface connecting the high-span region and the low-span region;
the cushion is laid in a high-span area, a low-span area and a surface connected with a slope surface;
the raft layer comprises a high-span layer raft positioned above a high-span region and a low-span layer raft positioned above a low-span region, one end, facing the low-span region, of the high-span layer raft extends to the position above the low-span layer raft, the low-span layer raft and one end, extending to the position above the low-span layer raft, of the high-span layer raft are connected through a vertically arranged connecting part, and a pouring cavity is formed among the high-span layer raft, the connecting slope and the connecting part;
be provided with on the high-span raft and pour the intracavity portion and communicate the slip casting mouth, pour the inside of pouring the chamber and fill up there is cast in situ concrete structure.
Through adopting above-mentioned technical scheme, high stride can separately be under construction simultaneously with the region of striding, finally will be high through the connecting portion and stride a layer raft and low stride a layer raft and connect the back, thereby to the high layer raft of striding, connect domatic and the connecting portion between form pour the intracavity concreting and form cast-in-place concrete structure, cast-in-place concrete structure strides a layer raft with the low layer raft of striding with the height and is connected as an organic wholely, can guarantee finally that the height that forms strides foundation structure's intensity, can shorten the construction cycle that infrastructure was striden to the height simultaneously.
Optionally, an elastic plug for sealing the grouting opening is detachably connected inside the grouting opening.
Through adopting above-mentioned technical scheme, after pouring the intracavity and having pour the concrete, can plug up the slip casting mouth to prevent that external foreign matter from entering into and pouring the intracavity, thereby the solidification of the concrete of intracavity is pour in the influence.
Optionally, a waterproof layer is arranged on the surface of the cushion layer.
Through adopting above-mentioned technical scheme, increase height and stride foundation structure's waterproof function.
The construction method of the high-low span foundation structure adopts the following technical scheme:
a construction method of a high-low span foundation structure comprises the following concrete construction steps:
the first step, cushion layer construction: constructing cushion layers on the high-span area, the low-span area and the surface connected with the slope;
secondly, building a support system: building a support system at one end of the low span region close to the high span region, wherein the support system comprises a bearing plate and a support frame, the top end surface of the bearing plate is flush with the top end surface of the cushion layer on the high span region, the support frame is positioned below the bearing plate and used for supporting the bearing plate, and one end of the bearing plate, facing the high span region, is butted with the cushion layer on the high span region;
thirdly, constructing the high-span raft: building pouring templates on the surfaces of the cushion layer on the high-span region and the top end surface of the bearing plate, forming a pouring space for pouring the high-span raft through the pouring templates, binding steel bars in the pouring space, pouring concrete into the pouring space after the binding of the steel bars is finished so as to form the high-span raft, and removing the pouring templates after the high-span raft is completely solidified and molded;
fourthly, constructing the low-span raft: building a pouring template on the surface of the cushion layer on the low-span region, forming a pouring space for pouring the low-span raft through the pouring template, binding steel bars in the pouring space, pouring concrete into the pouring space after the binding of the steel bars is finished so as to form the low-span raft, and removing the pouring template after the low-span raft is completely solidified and molded;
fifthly, building a connecting part pouring template and pouring the connecting part: building a pouring template for pouring a connecting part between a molded high-span raft and a molded low-span raft, building a reinforcement cage between the high-span raft and the low-span raft before building the pouring template, enclosing the reinforcement cage inside the pouring template, pouring concrete into the pouring template after building, forming the connecting part for connecting the low-span raft and the high-span raft after the concrete is solidified and molded, and removing the pouring template after the concrete is solidified and molded;
sixthly, dismantling a support system: after the high-span raft, the low-span raft and the connecting part are all solidified and dug, the support system is dismantled;
seventhly, backfilling and pouring the pouring cavity: the method comprises the steps of firstly sealing and sealing openings at two ends of a pouring cavity through a template, pouring concrete into the pouring cavity through a grouting port after the openings at two ends of the pouring cavity are sealed until the pouring cavity is filled with the concrete, and forming a cast-in-place concrete structure after the concrete is solidified.
Through adopting above-mentioned technical scheme, form supporting platform at the low one end of striding the region towards high stride the region through the supporting system, thereby can carry out pouring of high-span layer raft at high stride region and the supporting platform who forms, carry out the construction of low span region position in low span region department simultaneously, thereby need not like traditional technology, need wait for the construction of low span region and accomplish the back and just can go on, can go on the construction of part in same section time, and no longer the front-to-back connection construction, construction period has been shortened.
Optionally, the support frame is provided with a shear support.
Through adopting above-mentioned technical scheme, increase the support ability of support frame, improve the stability of loading board.
Optionally, during the third step of high-span raft construction, when the high-span raft is cast, a grouting pipe with a top end higher than the cast template is inserted into the casting space in advance, the bottom end of the grouting pipe is connected with the bearing plate, and after the concrete is solidified, an inner hole of the grouting pipe forms a grouting port communicating the top end surface and the bottom end surface of the high-span raft.
Through adopting above-mentioned technical scheme, be convenient for form the slip casting mouth on high-span layer raft.
Optionally, the surface of the bearing plate is provided with an insertion hole, and the bottom end of the grouting pipe is inserted into the insertion hole.
Through adopting above-mentioned technical scheme, insert the spliced eye of loading board with the bottom of slip casting pipe in, when demolising the back at the loading board, the bottom of slip casting pipe is located the below of high-span layer raft to ensure that the slip casting pipe can will pour the chamber and the high top space intercommunication of striding layer raft.
Optionally, when the seventh step is performed and the pouring cavity is backfilled and poured, when the concrete in the pouring cavity is poured to one meter below the high-span raft, the self-compacting micro-expansive concrete is adopted for pouring.
Through adopting above-mentioned technical scheme, because can not the straight tube see clearly when pouring the intracavity concreting, thereby can fill up as far as through self-compaction micro-expansion concrete and pour the chamber, make the top department of pouring the chamber be difficult for appearing the cavity.
Optionally, after the first step and the cushion layer construction are finished, a waterproof layer is laid on the surface of the cushion layer.
By adopting the technical scheme, the water resistance of the finally formed high-low span foundation structure is increased.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the high-span and low-span areas can be separately and simultaneously constructed, after the high-span raft and the low-span raft are connected through the connecting parts, concrete is poured into a pouring cavity formed among the high-span raft, the connecting slope and the connecting parts to form a cast-in-place concrete structure, and the cast-in-place concrete structure connects the high-span raft and the low-span raft into a whole, so that the strength of the finally formed high-span and low-span foundation structure can be ensured, and meanwhile, the construction period of the high-span and low-span foundation structure can be shortened;
2. the supporting platform is formed at one end, facing the high-span region, of the low-span region through the supporting system, so that the high-span raft can be poured in the high-span region and the formed supporting platform, meanwhile, construction of the low-span region is carried out at the low-span region, the high-span raft can be poured without the need of waiting for the completion of the construction of the low-span region like the traditional process, partial construction can be carried out in the same period of time instead of front-to-back connection construction, and the construction period is shortened;
3. adopt self-compaction micro-expansion concrete to fill up and pour the chamber after one meter apart from high cross-layer raft to can fill up as far as and pour the chamber, make the top department of pouring the chamber be difficult for appearing the cavity.
Drawings
FIG. 1 is a schematic structural diagram of a high-low span infrastructure of an embodiment of the present application;
fig. 2 is a schematic structural diagram of a support structure of a high-span raft plate by using a support system in an embodiment of the present application;
FIG. 3 is a schematic structural view of a support system in an embodiment of the present application;
FIG. 4 is a schematic view of the connection structure between the grouting pipe and the bearing plate in the embodiment of the present application.
Description of reference numerals: 1. a base layer; 11. a high span region; 12. a low span region; 13. connecting the slope surface; 2. a cushion layer; 21. a waterproof layer; 3. a raft board layer; 31. high-span raft plates; 311. a grouting port; 32. low-span raft plates; 33. a connecting portion; 4. pouring a cavity; 5. a concrete structure is cast in situ; 6. elastic blocking; 7. a support system; 71. a carrier plate; 711. inserting holes; 72. a support frame; 73. a shear support; 8. and (4) grouting pipes.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses a high-low span foundation structure.
Referring to fig. 1, the high-low span foundation structure comprises a foundation layer 1, a cushion layer 2 laid on the surface of the foundation layer 1, and a raft layer 3 located above the cushion layer 2. The foundation layer 1 comprises a high span region 11, a low span region 12 with the top end surface lower than the high span region 11, and a connecting slope 13 located between the high span region 11 and the low span region 12, wherein the connecting slope 13 connects the surface of the high span region 11 with the surface of the low span region 12. The cushion layer 2 is laid on the surfaces of the high-span region 11, the low-span region 12 and the connecting slope surface 13.
A waterproof layer 21 is laid on the surface of the cushion layer 2.
The raft layer 3 comprises a high-span raft 31 positioned above the cushion layer 2 of the high-span region 11 and a low-span raft 32 positioned above the cushion layer 2 of the low-span region 12, and one end of the high-span raft 31, which faces the low-span region 12, extends to the upper side of the low-span raft 32. The high-span raft 31 extends to one end above the low-span raft 32 and is provided with the connecting portion 33 of vertical setting between the low-span raft 32, and the top of connecting portion 33 meets with high-span raft 31, and the bottom of connecting portion 33 meets with low-span raft 32. The connecting portion 33 is of a reinforced concrete structure.
The high-span raft 31 extends to a position above the low-span region 12, and a pouring cavity 4 is formed among the connecting part 33 and the connecting slope surface 13. And grouting ports 311 for communicating the space above the high-span raft 31 with the pouring cavity 4 are arranged on the high-span raft 31. A cast-in-place concrete structure 5 formed by solidifying concrete poured into the pouring cavity 4 through the grouting opening 311 is arranged inside the pouring cavity 4.
An elastic stopper 6 is provided inside the injection port 311, and one end of the elastic stopper 6 is inserted into the inside of the injection port 311 to close the injection port 311. The elastic plug 6 is fixed inside the grouting port 311 by friction. When concrete needs to be poured into the pouring cavity 4 through the grouting opening 311, the elastic plug 6 is pulled down by force, and then the grouting opening 311 can be opened.
The embodiment of the application also discloses a construction method of the high-low span foundation structure, which comprises the following specific steps:
the first step, cushion layer construction: and constructing the cushion layer 2 on the surface of the high-span region 11, the low-span region 12 and the connecting slope surface 13. After the cushion layer 2 is formed, a waterproof layer 21 is laid on the surface of the cushion layer 2, and the waterproof layer 21 is made of waterproof coiled materials or sprayed with waterproof paint.
Secondly, building a support system: referring to fig. 2 and 3, a support system 7 is built at one end of the low span region 12 close to the high span region 11, the support system 7 comprises a bearing plate 71 with a top end surface flush with the top end surface of the cushion layer 2 on the high span region 11 and a support bracket 72 positioned below the bearing plate 71 and used for supporting the bearing plate 71, and the bearing plate 71 is horizontally arranged. One end of the bearing plate 71 facing the high-span region 11 is abutted with the cushion layer 2 on the high-span region 11.
Still install the shear force on the support frame 72 and prop 73, thereby prop 73 through the shear force and increase the stability of support frame 72, guarantee the support effect of support frame 72 to loading board 71.
Thirdly, constructing the high-span raft: firstly, a pouring template for pouring the high-span raft 31 is built on the surface of the cushion layer 2 on the high-span region 11 and the top end surface of the bearing plate 71, and a pouring space for the high-span raft 31 is formed on the top end surfaces of the high-span region 11 and the bearing plate 71 through the pouring template. And (3) binding the steel bars in the pouring space, pouring concrete into the pouring space after the steel bars are bound and the pouring template is installed, and solidifying the concrete to form the high-span raft 31.
And after the high-span raft 31 is completely solidified and molded, removing the pouring template of the high-span raft 31.
Referring to fig. 4, a plugging hole 711 is formed in the surface of the top end of the bearing plate 71, a grouting pipe 8 is plugged in the plugging hole 711, the grouting pipe 8 is vertically arranged, and the top end of the grouting pipe 8 is higher than the built pouring template of the high-span raft 31. After the concrete is solidified, the top ends of the grouting pipes 8 are higher than the formed high-span raft 31.
Fourthly, constructing the low-span raft: and (3) building a pouring template for pouring the low-span raft 32 on the surface of the low-span region 12, and forming a pouring space on the top surface of the low-span region 12 through the pouring template. And (4) binding steel bars in the pouring space, pouring concrete into the pouring space after the steel bars are bound and the pouring templates are installed, and solidifying the concrete to form the low-span raft 32.
And after the low-span raft is solidified and molded, removing the low-span raft pouring template.
The third step, the high-span raft construction and the fourth step, the low-span raft construction can be synchronously carried out after the second step and the support system are built, so that the whole construction period is shortened.
Fifthly, building a connecting part pouring template and pouring the connecting part: building a pouring template between the lower part of one end of a low spanning region 12 towards which a molded high spanning raft 31 faces and one end of a high spanning region 11 towards which a molded low spanning raft 32 faces, forming a pouring space through the pouring template, connecting the bottom end of the pouring space with the molded low spanning raft 32, and connecting the top end of the pouring space with the molded high spanning raft 31.
Before the template is built to the connecting portion, build the steel reinforcement cage between high-span layer raft 31 and low-span layer raft 32, the top of steel reinforcement cage is fixed with high-span layer raft 31, and the bottom of steel reinforcement cage is fixed with low-span layer raft 32. And then when the connecting part pouring template is built, the pouring template encloses the reinforcement cage inside.
When concrete is poured into the pouring template, a connecting part 33 for connecting the high-span raft 31 and the low-span raft 32 is formed after the concrete is formed. The high-span raft 31, the low-span raft 32 and the connecting parts 33 form a complete whole.
And after the connecting part 33 is completely molded, removing the pouring template of the connecting part.
Sixthly, dismantling a support system: and after the high-span raft 31, the low-span raft 32 and the connecting part 33 are solidified, the support system 7 is dismantled. After the loading plates 71, the support frames 72 and the shear braces 73 are removed, the grouting pipes 8 are left inside the high-span raft 31 and penetrate through the high-span raft 31.
After the support system is dismantled, a pouring cavity 4 with openings at two ends is formed among the high-span raft 31, the connecting slope 13 and the low-span region 12.
Seventhly, backfilling and pouring the pouring cavity: firstly, sealing and sealing the openings at the two ends of the pouring cavity 4 through template engineering, pouring concrete into the pouring cavity 4 through the grouting pipe 8 after the openings at the two ends of the pouring cavity 4 are sealed until the concrete fills the pouring cavity 4, and dismantling the templates at the two ends of the pouring cavity 4 after the concrete entering the pouring cavity 4 is finally solidified to complete the construction of the high-low span foundation.
When pouring concrete to the inside of pouring chamber 4, when concrete and high cross-layer raft 31 apart from one meter, pour self-compaction micro-expansive concrete to the inside of pouring the chamber through slip casting pipe 8, until will pour chamber 4 and fill up.
Through the construction method of the high low foundation of striding that this application discloses, it forms supporting platform at low span region 12 towards the one end of high span region 11 through support system 7, thereby can carry out the pouring of high span layer raft 31 at high span region 11 and the supporting platform that forms, carry out the construction at low span region 12 position simultaneously, thereby need not like traditional technology, need wait that the construction of low span region 12 can go on after finishing, can go on partial construction in same section time, and no longer the tandem construction, construction period has been shortened. Construction of the connecting portions 33 is performed between the final high-span raft 31 and the final low-span raft 32, the high-span raft 31 and the low-span raft 32 are connected together through the connecting portions 33, concrete is poured into the formed pouring cavity 4 finally, and the strength of the final formed high-low span foundation is guaranteed.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A high-low span infrastructure, characterized by: comprises a base layer (1), a cushion layer (2) and a raft slab layer (3) positioned above the cushion layer (2);
the foundation layer (1) comprises a high-span region (11), a low-span region (12) and a connecting slope surface (13) connecting the high-span region (11) and the low-span region (12);
the cushion layer (2) is laid on the surfaces of the high-span region (11), the low-span region (12) and the connecting slope surface (13);
the raft layer (3) comprises a high-span raft (31) located above a high-span region (11) and a low-span raft (32) located above a low-span region (12), one end, facing the low-span region (12), of the high-span raft (31) extends to the upper side of the low-span raft (32), the low-span raft (32) is connected with one end, extending to the upper side of the low-span raft (32), of the high-span raft (31) through a vertically-arranged connecting part (33), and a pouring cavity (4) is formed among the high-span raft (31), the connecting slope surface (13) and the connecting part (33);
and a grouting opening (311) communicated with the interior of the pouring cavity (4) is formed in the high-span raft (31), and a cast-in-place concrete structure (5) is filled in the pouring cavity (4).
2. A high-low bay infrastructure as claimed in claim 1 in which: the inner part of the grouting opening (311) is detachably connected with an elastic plug (6) used for sealing the grouting opening (311).
3. A high-low bay infrastructure as claimed in claim 1 in which: and a waterproof layer (21) is arranged on the surface of the cushion layer (2).
4. The construction method of the high-low span foundation structure according to claim 1, characterized by comprising the following concrete construction steps:
the first step, cushion layer construction: constructing a cushion layer (2) on the surface of the high-span region (11), the low-span region (12) and the connecting slope surface (13);
secondly, building a support system: a support system (7) is built at one end, close to a high-span region (11), of a low-span region (12), the support system (7) comprises a bearing plate (71) with the top end surface flush with the top end surface of a cushion layer (2) on the high-span region (11) and a support frame (72) located below the bearing plate (71) and used for supporting the bearing plate (71), and one end, facing the high-span region (11), of the bearing plate (71) is butted with the cushion layer (2) on the high-span region (11);
thirdly, constructing the high-span raft: building pouring templates on the surfaces of the cushion layer (2) on the high-span region (11) and the top end surface of the bearing plate (71), forming a pouring space for pouring the high-span raft (31) through the pouring templates, binding steel bars in the pouring space, pouring concrete into the pouring space after the binding of the steel bars is finished so as to form the high-span raft (31), and removing the pouring templates after the high-span raft (31) is completely solidified and molded;
fourthly, constructing the low-span raft: building a pouring template on the surface of the cushion layer (2) on the low-span region (12), forming a pouring space for pouring the low-span raft (32) through the pouring template, binding steel bars in the pouring space, pouring concrete into the pouring space after the binding of the steel bars is finished so as to form the low-span raft (32), and removing the pouring template after the low-span raft (32) is completely solidified and molded;
fifthly, building a connecting part pouring template and pouring the connecting part: building a pouring template for pouring a connecting part (33) between a molded high-span raft (31) and a molded low-span raft (32), building a reinforcement cage between the high-span raft (31) and the low-span raft (32) before building the pouring template, enclosing the reinforcement cage inside the pouring template by the pouring template, pouring concrete into the pouring template after building, forming the connecting part (33) for connecting the low-span raft (32) and the high-span raft (31) after the concrete is molded, and removing the pouring template after the concrete is solidified and molded;
sixthly, dismantling a support system: after the high-span raft (31), the low-span raft (32) and the connecting part (33) are all solidified and dug, the supporting system (7) is dismantled;
seventhly, backfilling and pouring the pouring cavity: firstly, the openings at the two ends of the pouring cavity (4) are sealed and sealed through the template, after the openings at the two ends of the pouring cavity (4) are sealed, concrete is poured into the pouring cavity (4) through the grouting port (311) until the pouring cavity (4) is filled with the concrete, and a cast-in-place concrete structure (5) is formed after the concrete is solidified.
5. The construction method of the high-low span foundation structure according to claim 4, wherein: the supporting frame (72) is provided with a shear support (73).
6. The construction method of the high-low span foundation structure according to claim 4, wherein: and in the third step, when the high-span raft (31) is constructed, when the high-span raft (31) is poured, a grouting pipe (8) with the top end higher than the pouring template is inserted into the pouring space in advance, the bottom end of the grouting pipe (8) is connected with the bearing plate (71), and after the concrete is solidified, an inner hole of the grouting pipe (8) forms a grouting opening (311) for communicating the top end surface and the bottom end surface of the high-span raft (31).
7. The construction method of the high-low span foundation structure according to claim 6, wherein: the surface of the bearing plate (71) is provided with a plug hole (711), and the bottom end of the grouting pipe (8) is inserted into the plug hole (711).
8. The construction method of the high-low span foundation structure according to claim 4, wherein: and when the seventh step is carried out and the pouring cavity (4) is backfilled and poured, when the concrete in the pouring cavity (4) is poured to one meter below the high-span raft (31), the self-compacting micro-expansive concrete is adopted for pouring.
9. The construction method of the high-low span foundation structure according to claim 1, characterized in that: in the first step, after the construction of the cushion layer (2) is finished, a waterproof layer (21) is paved on the surface of the cushion layer (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210348617.7A CN114575370B (en) | 2022-04-01 | 2022-04-01 | High-low span foundation structure and construction method |
Applications Claiming Priority (1)
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4231289A (en) * | 1988-09-30 | 1990-04-05 | Csir | Foundation raft for a structure |
| CN105714849A (en) * | 2016-01-29 | 2016-06-29 | 中国华冶科工集团有限公司 | Reverse construction method for adjacent high and low floors (bays) of basement |
| CN109372024A (en) * | 2018-11-29 | 2019-02-22 | 江苏兴厦建设工程集团有限公司 | A kind of sole plate waterproof structure for deformation seams and construction method |
| CN110219313A (en) * | 2019-06-05 | 2019-09-10 | 中国五冶集团有限公司 | A kind of underground construction blind shaft drainage system and construction method |
| CN112412002A (en) * | 2020-11-14 | 2021-02-26 | 宝冶(郑州)建筑工程有限公司 | Striding type template support system |
| CN113605443A (en) * | 2021-07-26 | 2021-11-05 | 北京城建集团有限责任公司 | High-low span concrete bottom plate construction structure and method thereof |
| CN214659373U (en) * | 2021-05-11 | 2021-11-09 | 北京市第五建筑工程集团有限公司 | Reusable enclosure structure |
| KR20210154337A (en) * | 2020-06-12 | 2021-12-21 | 정하동 | Construction Method of Underground Structures |
| CN113944192A (en) * | 2021-10-27 | 2022-01-18 | 上海宝冶集团有限公司 | Deformation joint connecting structure for basement roof soil covering area |
-
2022
- 2022-04-01 CN CN202210348617.7A patent/CN114575370B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4231289A (en) * | 1988-09-30 | 1990-04-05 | Csir | Foundation raft for a structure |
| CN105714849A (en) * | 2016-01-29 | 2016-06-29 | 中国华冶科工集团有限公司 | Reverse construction method for adjacent high and low floors (bays) of basement |
| CN109372024A (en) * | 2018-11-29 | 2019-02-22 | 江苏兴厦建设工程集团有限公司 | A kind of sole plate waterproof structure for deformation seams and construction method |
| CN110219313A (en) * | 2019-06-05 | 2019-09-10 | 中国五冶集团有限公司 | A kind of underground construction blind shaft drainage system and construction method |
| KR20210154337A (en) * | 2020-06-12 | 2021-12-21 | 정하동 | Construction Method of Underground Structures |
| CN112412002A (en) * | 2020-11-14 | 2021-02-26 | 宝冶(郑州)建筑工程有限公司 | Striding type template support system |
| CN214659373U (en) * | 2021-05-11 | 2021-11-09 | 北京市第五建筑工程集团有限公司 | Reusable enclosure structure |
| CN113605443A (en) * | 2021-07-26 | 2021-11-05 | 北京城建集团有限责任公司 | High-low span concrete bottom plate construction structure and method thereof |
| CN113944192A (en) * | 2021-10-27 | 2022-01-18 | 上海宝冶集团有限公司 | Deformation joint connecting structure for basement roof soil covering area |
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