CN112900495A - Mechanical layered splicing construction structure and construction method of assembled underground structure - Google Patents
Mechanical layered splicing construction structure and construction method of assembled underground structure Download PDFInfo
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- CN112900495A CN112900495A CN202110339964.9A CN202110339964A CN112900495A CN 112900495 A CN112900495 A CN 112900495A CN 202110339964 A CN202110339964 A CN 202110339964A CN 112900495 A CN112900495 A CN 112900495A
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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
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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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
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
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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
- 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
- E04B1/0007—Base structures; Cellars
- E04B1/0015—Cellars constructed from prefabricated units
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
Abstract
A mechanized layered assembly construction structure and a construction method of an assembled underground structure belong to the technical field of underground engineering. The appearance geometry of the bottom base layer is rectangular and in a shape like a Chinese character 'tu'; the backfill layer is a part between the prefabricated component and the foundation pit supporting structure and the bottom foundation layer; the prefabricated part is a prefabricated solid block with a top opening, a bottom opening and a top-bottom double-opening form; the wall end structure of the side wall is a plane, convex and concave structure, and the prefabricated part is a space structure assembled layer by layer from bottom to top; the section form of the space structure body is a rectangular, arched or other structure form, the size, the position and the wall end structure of the side wall of the prefabricated part on the same layer are the same, and after the prefabricated parts are longitudinally connected, the wall end of the side wall forms a flat and straight surface. When the upper-layer component is assembled, the assembling device is arranged on the side wall of the lower-layer component, so that the equipment cost is effectively reduced, a working surface is provided for subsequent procedures, and the construction efficiency is improved.
Description
Technical Field
The invention relates to a mechanized layered assembly construction structure and a mechanized layered assembly construction method of an assembled underground structure, and belongs to the technical field of underground engineering.
Background
The urban underground engineering is generally constructed by adopting the traditional cast-in-place process, the production mode is still relatively extensive, and the difference is large compared with the requirement of high-quality development. With the continuous improvement of the economic level of China and the rapid development of society, the requirement on transformation and upgrading of the construction industry is urgent. The development of the assembly type building is a great change of the construction mode, is an important measure for promoting the structural reform of the supply side and the development of novel urbanization, is favorable for saving resource and energy, reducing construction pollution, improving labor production efficiency and quality safety level, and is favorable for promoting the building industry to transform to industrialization and informatization, cultivating new kinetic energy of new industry and promoting the excess capacity of chemical solution. The industrialization of a novel building represented by an assembly type building is rapidly promoted, and the construction level and the building quality are obviously improved.
The method develops the research of the assembly type construction technology of the underground engineering, realizes the standardized design, the factory prefabrication, the mechanical assembly and the informatization management, is beneficial to improving the engineering construction level and conforms to the high-quality development requirement of the building industry. The assembly design and the mechanical assembly of underground engineering are realized, and the premise of realizing automatic, intelligent and even unmanned construction is provided. Compared with complex and fussy cast-in-place procedures, the mechanical assembly of the prefabricated parts provides a simpler technical path for future unmanned construction, and provides basic technical support for the landing application of novel building industrialization and intelligent construction technology in underground engineering construction.
The existing construction method is limited by the self-technology, can only be applied to foundation pits without inner supports, and cannot be applied to assembly construction under an inner support system. In addition, when assembling the components, the hoisting equipment is required to be tightly matched with the assembling equipment, so that the command and the assistance of personnel cannot be separated, and further automatic assembly is difficult to realize.
The closest technical scheme is as follows:
202010526910.9, 202010527483.6, 202010526909.6 and 202010527482.1 disclose a subway station fabricated structure, a construction method and a construction device, which can realize the mechanized assembly of the structure. The assembling device and the assembling method are obviously different from the assembling device and the assembling method, and the assembling device and the assembling method have the advantages in the aspects of construction efficiency and cost reduction.
The 201410390019.1 patent application discloses a subway station fabricated structure construction method, and the assembly method is remarkably different from the application, and the application has advantages in the aspects of construction efficiency and cost reduction.
The patent applications 201410136708.X and 201410136710.7 disclose a subway station fabricated structure construction method, the assembling method is obviously different from the application, and the application has advantages in the aspects of construction efficiency and cost reduction.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a mechanized layered splicing construction structure and a mechanized layered splicing construction method of an assembled underground structure.
Construction structures is assembled in mechanized layering of assembled underground structure, including: the bottom foundation layer, the backfill layer, the prefabricated parts and the interlayer connecting parts are arranged on the bottom foundation layer, and the appearance geometry of the bottom foundation layer is rectangular and in a shape like a Chinese character 'tu'; the backfill layer is a part between the prefabricated component and the foundation pit supporting structure and the bottom foundation layer; the prefabricated part is a prefabricated solid block with a top opening, a bottom opening and a top-bottom double-opening form; the wall end structure of the side wall is a plane, convex and concave structure, and the prefabricated part is a space structure assembled layer by layer from bottom to top; the section form of the space structure body is a rectangular, arched or other structural form, the size, the position and the wall end structure of the side wall of the prefabricated part on the same layer are the same, and after the prefabricated parts are longitudinally connected, the wall end of the side wall forms a flat and straight surface; the side walls of the prefabricated components of the adjacent layers correspond to each other in position, so that the side wall ends of the prefabricated components are in butt joint connection; the side wall end of the prefabricated part of the adjacent layer adopts the combination of a plane, a concave surface and a concave surface, a convex surface and a plane, and a convex surface, and the interlayer connecting part is in a structure connecting the prefabricated parts of the upper layer and the lower layer; the interlayer connecting part is connected to the side wall end of the prefabricated part; filling the gap formed by the end face structure of the side wall by the interlayer connecting part; the longitudinal connection of the prefabricated parts adopts a tongue-and-groove connection, a socket connection, a bolt connection or a prestressed tendon connection system.
The upper surface of the bottom base layer has a flat and straight surface. A backfill layer is arranged between the side face of the lower-layer component of the backfill layer at the trapezoid port of the cushion layer and the enclosure structure. The bottom foundation layer is one of cast-in-place concrete, precast concrete and steel solid blocks. The backfill layer is one of concrete, cement mortar and cement paste. The prefabricated part is provided with at least two side walls. The interlayer connecting part is a post construction structure; height h of interlayer connection part0Is at the height h of the body of the assembling equipment1To the fuselage height h of the assembly plant1Adding a rise height h2Is h1＜h0＜h1+h2The height of the body of the assembling equipment is h1, the lifting height is h2, and the height of the interlayer connecting part is between h1 and h1+ h 2. The longitudinal connecting joint of the prefabricated parts adopts a multi-channel sealing gasket structure.
The mechanized layered assembly construction method of the assembled underground structure comprises the following steps:
and 5, assembling the nth layer of prefabricated parts, and repeating the step 4 to assemble the second layer of prefabricated parts to complete the assembly of the nth layer of prefabricated parts.
In step 4, the step of forming the interlayer connection part is as follows:
the side wall ends of the prefabricated components of the adjacent layers are planar, the supporting blocks are firstly used for supporting the components of the upper layer, then the assembling equipment is retracted, finally the reinforced concrete structure is constructed,
the side wall end of the prefabricated part of the adjacent layer adopts a concave surface and a plane, a concave surface and a concave surface, a convex surface and a plane, and a convex surface, the prefabricated part can be retracted after being in place by the assembling equipment, and then a reinforced concrete structure is constructed;
and step 3 or step 4 also comprises a longitudinal connecting step of the prefabricated parts, and the longitudinal connection of the prefabricated parts adopts a mature connection scheme of a tongue-and-groove connection system, a socket connection system, a bolt connection system and a prestressed tendon connection system. The method has the advantages that the block assembly construction of the structure is realized under a dense inner support supporting system, including the cover-excavation method covering. Meanwhile, the assembly process can be realized only by means of the assembling equipment, and the automatic assembly of the components is easier to realize through the automatic transformation of the assembling equipment.
At present, an internal support supporting system is generally adopted in domestic underground structural engineering constructed by an open cut method, and the internal support has great interference and influence on the hoisting and assembling of prefabricated parts, so that the assembly type construction method is difficult to popularize in the underground structural engineering. The invention solves the problem that the fabricated structure is difficult to implement under an internal support supporting system, and has a great technical promotion effect on the transformation of the underground structure construction from the traditional cast-in-place operation to the fabricated and industrialized construction mode. The construction structure and the construction method are effectively combined with the characteristics and functions of the assembly equipment, and the assembly device is arranged on the side wall of the lower-layer component when the upper-layer component is assembled, so that the diversified requirements on the construction equipment are reduced, the standardization of the construction structure, the construction method and the construction equipment during the assembly construction of each layer of structure is realized, the cost can be effectively reduced, the operation efficiency is improved, an operation surface is provided for the subsequent processes such as secondary structure, decoration and the like, and the advanced construction of the subsequent processes is realized.
Drawings
A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein the accompanying drawings are included to provide a further understanding of the invention and form a part of this specification, and wherein the illustrated embodiments of the invention and the description thereof are intended to illustrate and not limit the invention, as illustrated in the accompanying drawings, in which:
fig. 1 is a view showing a two-layered assembled type underground structure according to the present invention.
Fig. 2 is a view showing a construction of the fabricated underground structure assembled in three levels according to the present invention.
FIG. 3 is a schematic view of a plane plus plane structure according to the present invention.
FIG. 4 is a schematic view of a planar plus concave structure according to the present invention.
FIG. 5 is a schematic view of a concave plus concave structure according to the present invention.
FIG. 6 is a schematic view of a planar-convex structure according to the present invention.
FIG. 7 is a schematic diagram of a planar-convex structure according to the present invention.
FIG. 8 is a schematic view of a convex-convex structure according to the present invention.
Fig. 9 is a schematic view of excavation of a foundation pit according to the present invention.
FIG. 10 is a schematic diagram of a base substrate layer of the present invention.
FIG. 11 is a schematic diagram of a second embodiment of the present invention.
FIG. 12 is a schematic view of the first assembled prefabricated panels of the present invention, the components being assembled in sequence.
FIG. 13 is a schematic view of the assembled first prefabricated panels of the present invention, applied as a backfill layer.
FIG. 14 is a schematic view of the second-layer prefabricated panels assembled in sequence to assemble the members according to the present invention.
FIG. 15 is a schematic view of the second assembled prefabricated panel of the present invention, applied as a backfill layer.
Fig. 16 is a schematic structural view illustrating the supporting block of the present invention supporting the upper prefabricated elements.
Fig. 17 is a schematic view of a retraction structure of the splicing apparatus of the present invention.
Fig. 18 is a schematic view of the reinforced concrete structure of the present invention, with the support blocks retained within the structure.
Fig. 19 is a schematic view of the second layer of prefabricated parts of the present invention in place.
Fig. 20 is a schematic view of a retraction structure of the splicing apparatus of the present invention.
Fig. 21 is a schematic view of the reinforced concrete structure of the present invention.
Fig. 22 is a schematic view of a second layer of prefabricated elements according to the invention in place.
Fig. 23 is a schematic drawing of the retraction of the splicing apparatus of the present invention.
Fig. 24 is a schematic view of a reinforced concrete structure according to the present invention.
Fig. 25 is a structural view of the present invention.
In the figure: the foundation comprises a foundation 1, an inner support 2, a building enclosure 3, prefabricated parts (bottom openings) 4, interlayer connecting parts 5, side wall ends 6, side walls 7, prefabricated parts (top openings) 8, a backfill layer 9, a foundation layer 10, prefabricated parts (top and bottom double openings) 11, an assembling device 12, a pit bottom 13, upper prefabricated parts 14, lower prefabricated parts 15, supporting blocks 16 and a concrete structure 17.
The invention is further illustrated with reference to the following figures and examples.
Detailed Description
It will be apparent that those skilled in the art can make many modifications and variations based on the spirit of the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element, component or section is referred to as being "connected" to another element, component or section, it can be directly connected to the other element or section or intervening elements or sections may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art.
The following examples are further illustrative in order to facilitate the understanding of the embodiments, and the present invention is not limited to the examples.
Example 1: as shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 and 25, the mechanized construction structure for a fabricated underground structure includes: a bottom foundation layer 10, a backfill layer 9, prefabricated parts (top opening) 8, prefabricated parts (top and bottom double openings) 11, upper prefabricated parts 14, lower prefabricated parts 15 and interlayer connecting parts 5.
The bottom foundation layer 10 is a cast-in-place concrete, a precast concrete and a steel solid block; the bottom base layer 10 can be made of various materials and processes, and the appearance geometry of the bottom base layer 10 is rectangular and in a shape like a Chinese character 'tu'; the upper surface of the bottom foundation layer 10 should have higher flatness, and the backfill layer 9 is a part between the prefabricated component and the foundation pit supporting structure and the bottom foundation layer; the backfill layer 9 is made of concrete, cement mortar and cement paste, and the backfill layer 9 can be made of various materials.
The prefabricated parts are prefabricated solid blocks in the form of top opening, bottom opening, top and bottom double openings (comprising prefabricated parts (top opening) 8, prefabricated parts (top and bottom double openings) 11, upper prefabricated parts 14 and lower prefabricated parts 15).
The prefabricated part is provided with at least two side walls 7; the wall end structure of the side wall 7 is a plane, convex and concave structure, and the prefabricated parts (including a prefabricated part (top opening) 8, a prefabricated part (top and bottom double openings) 11, an upper prefabricated part 14 and a lower prefabricated part 15) are assembled layer by layer from bottom to top to form a larger space structure; the section form of the space structure body is rectangular, arched or other structural forms, the size, the position and the wall end structure of the side wall 7 of the prefabricated part on the same layer are the same, and after the prefabricated parts are longitudinally connected, the wall end 6 of the side wall forms a flat and straight surface; the side walls 7 of the prefabricated components of the adjacent layers correspond to each other in position, so that the side wall ends 6 of the prefabricated components are in butt joint connection; the side wall end 6 of the prefabricated component of the adjacent layer adopts the combination of a plane and a plane, a concave surface and a concave surface, a convex surface and a plane, and a convex surface, and the interlayer connecting part 5 is in a structure connecting the prefabricated components of the upper layer and the lower layer; the interlayer connecting part 5 is connected to the side wall end 6 of the prefabricated part; the interlayer connecting part 5 fills a gap formed by the structure of the side wall end 6; the interlayer connection part 5 is a post-construction structure similar to a post-cast strip in a building structure; height h of interlayer connection part 50Is at the height h of the body of the splicing equipment 121To the fuselage height h of the splicing device 121Adding a rise height h2Is h1＜h0＜h1+h2Space and conditions are provided for operation of the assembling equipment 12, and layered mechanical assembling construction of the prefabricated parts is realized.
Explanation: the height of the machine body of the assembling equipment is set as h1With a rise height h2The height of the interlayer connection part 5 is h1～h1+h2The prefabricated parts are longitudinally connected by adopting a mature connection scheme of a tongue-and-groove connection system, a socket connection system, a bolt connection system and a prestressed tendon connection system, the longitudinal connection joints of the prefabricated parts are waterproof, a mature waterproof scheme of a multi-sealing gasket system is adopted, necessary conventional embedded parts are embedded in the prefabricated parts, and the hoisting and assembling requirements of the prefabricated parts are met.
Example 2: as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 9, fig. 10, fig. 11, fig. 12, fig. 13, fig. 14, fig. 15, fig. 16, fig. 17, fig. 18, fig. 19, fig. 20, fig. 21, fig. 22, fig. 23, fig. 24 and fig. 25, the mechanized layered assembly construction method of the fabricated underground structure includes the following steps:
and 5, assembling the nth layer of prefabricated parts, and repeating the step 4 to assemble the second layer of prefabricated parts to complete the assembly of the nth layer of prefabricated parts.
In step 4, the step of forming the interlayer connection part is as follows:
for the side wall ends of the prefabricated parts of the adjacent layers, the prefabricated parts of the adjacent layers are planar and planar, as shown in fig. 16, 17 and 18, the upper layer of the prefabricated parts 14 are supported by using supporting blocks 16, then the assembling equipment retracts, and finally a reinforced concrete structure is constructed, for the side wall ends of the prefabricated parts of the adjacent layers, the prefabricated parts of the adjacent layers are concave and planar, concave and concave, convex and planar, and convex, as shown in fig. 19, 20, 21, 22, 23 and 24, the assembling equipment retracts after the prefabricated parts are in place, and then the reinforced concrete structure is constructed.
And 3, the step 4 also comprises a longitudinal connecting step of the prefabricated parts, and the longitudinal connection of the prefabricated parts adopts a mature connection scheme of a tongue-and-groove connection system, a socket connection system, a bolt connection system and a prestressed tendon connection system.
Example 3: as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 9, fig. 10, fig. 11, fig. 12, fig. 13, fig. 14, fig. 15, fig. 16, fig. 17, fig. 18, fig. 19, fig. 20, fig. 21, fig. 22, fig. 23, fig. 24 and fig. 25, the mechanized construction structure of the fabricated underground structure is a layer-by-layer assembly construction structure, the top layer of the foundation is a base layer, two sides of the foundation are respectively provided with a building envelope, a plurality of support structures are connected between the building envelopes, the base layer is connected with a cushion layer, and the cushion layer is a section; the lower floor component is placed above the bed course, the trapezoidal mouth of the bed course has a backfill layer between the side of the lower floor component of the backfill layer and the enclosure, the assembling device can rise or fall the upper component, the upper component and the lower floor component are connected through prestressed tendon reinforcing bars, the reinforcing bars are main reinforcing bars for connecting the upper component and the lower floor component, the upper component and the lower floor component are respectively provided with a reserved hole channel, the prestressed tendon is connected in the reserved hole channel, a connector and reinforcing bars are plugged, the upper component and the lower floor component are respectively provided with an installation connector, the connector is connected with the reinforcing bars, the mechanical connecting sleeve is connected at the joint of 2 reinforcing bars, and the supporting block is arranged in the middle of a structure formed by the reinforcing bars and the mechanical connecting sleeve.
As described above, although the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that many modifications are possible without substantially departing from the spirit and scope of the present invention. Therefore, such modifications are also all included in the scope of protection of the present invention.
Claims (10)
1. Construction structures is assembled in mechanized layering of assembled underground structure, its characterized in that including: the bottom foundation layer, the backfill layer, the prefabricated parts and the interlayer connecting parts are arranged on the bottom foundation layer, and the appearance geometry of the bottom foundation layer is rectangular and in a shape like a Chinese character 'tu'; the backfill layer is a part between the prefabricated component and the foundation pit supporting structure and the bottom foundation layer; the prefabricated part is a prefabricated solid block with a top opening, a bottom opening and a top-bottom double-opening form; the wall end structure of the side wall is a plane, convex and concave structure, and the prefabricated part is a space structure assembled layer by layer from bottom to top; the section form of the space structure body is a rectangular, arched or other structural form, the size, the position and the wall end structure of the side wall of the prefabricated part on the same layer are the same, and after the prefabricated parts are longitudinally connected, the wall end of the side wall forms a flat and straight surface; the side walls of the prefabricated components of the adjacent layers correspond to each other in position, so that the side wall ends of the prefabricated components are in butt joint connection; the side wall end of the prefabricated part of the adjacent layer adopts the combination of a plane, a concave surface and a concave surface, a convex surface and a plane, and a convex surface, and the interlayer connecting part is in a structure connecting the prefabricated parts of the upper layer and the lower layer; the interlayer connecting part is connected to the side wall end of the prefabricated part; filling the gap formed by the end face structure of the side wall by the interlayer connecting part; the longitudinal connection of the prefabricated parts adopts a tongue-and-groove connection, a socket connection, a bolt connection or a prestressed tendon connection system.
2. The mechanical layered assembly construction structure of an assembled underground structure of claim 1, wherein the upper surface of the bottom foundation layer has a flat and straight surface.
3. The mechanized stratified assembly construction structure of an assembled underground structure of claim 1, wherein the trapezoid opening of the bedding layer has a backfill layer between the side of the lower member of the backfill layer and the envelope structure.
4. The mechanical layered assembly construction structure of an assembled underground structure of claim 1, wherein the bottom foundation layer is one of cast-in-place concrete, precast concrete and steel solid blocks.
5. The mechanical layered assembly construction structure of an assembled underground structure of claim 1, wherein the backfill layer is one of concrete, cement mortar and cement paste.
6. The mechanical layered assembly construction structure of an assembled underground structure of claim 1, wherein the prefabricated parts have at least two side walls.
7. The mechanical layered assembly construction structure of an assembled underground structure according to claim 1, wherein the interlayer connection part is a post-construction structure; height h of interlayer connection part0Is at the height h of the body of the assembling equipment1To the fuselage height h of the assembly plant1Adding a rise height h2Is h1＜h0＜h1+h2The height of the body of the assembling equipment is h1With a rise height h2The height of the interlayer connection part 5 is h1～h1+h2In the meantime.
8. The mechanical layered assembly construction structure of an assembled underground structure according to claim 1, wherein the longitudinal joint of the prefabricated members is constructed with a multi-layer sealing structure.
9. The mechanized layered assembly construction method of the assembled underground structure is characterized by comprising the following steps:
step 1, excavating and supporting a foundation pit, wherein a supporting scheme of a slope placing, soil nailing wall supporting, pile (wall) anchor supporting and pile (wall) supporting system is adopted in a foundation pit supporting structure,
step 2, constructing a bottom foundation layer, constructing the bottom foundation layer after the foundation pit is excavated to the bottom of the pit,
step 3, assembling the first layer of prefabricated components, assembling and debugging assembling equipment after the construction of the base foundation layer is finished, arranging the assembling equipment on the base foundation layer, hoisting the prefabricated components to the assembling equipment, transporting the prefabricated components to the designed position by the assembling equipment, adjusting the position and the posture of the prefabricated components to complete the positioning of the prefabricated components, then returning the assembling equipment to the initial position to sequentially complete the assembling of the first layer of components,
step 4, assembling the second layer of prefabricated parts, after the first layer of prefabricated parts are assembled, firstly constructing a backfill layer between the first layer of prefabricated parts and a foundation pit supporting structure and a foundation bed, after the strength of the backfill layer meets the specification, removing an inner support which influences the assembly of the second layer of prefabricated parts for a foundation pit adopting a pile (wall) supporting system, and after the assembly and debugging of an assembly device for the foundation pit without the inner support or the inner support are completed, arranging the assembly device at the side wall end of the first layer of prefabricated parts, hoisting the prefabricated parts to the assembly device, transporting the prefabricated parts to a design position by the assembly device, adjusting the position and posture of the prefabricated parts, completing the in-position of the prefabricated parts, then returning the assembly device to the initial position, and constructing an interlayer connecting part between the first layer of prefabricated parts and the second layer of prefabricated parts,
and 5, assembling the nth layer of prefabricated parts, and repeating the step 4 to assemble the second layer of prefabricated parts to complete the assembly of the nth layer of prefabricated parts.
10. The mechanical layered splicing construction method of an assembled underground structure according to claim 9, characterized in that in step 4, the step of constructing the interlayer connection part is as follows:
the side wall ends of the prefabricated components of the adjacent layers are planar, the supporting blocks are firstly used for supporting the components of the upper layer, then the assembling equipment is retracted, finally the reinforced concrete structure is constructed,
the side wall end of the prefabricated part of the adjacent layer adopts a concave surface and a plane, a concave surface and a concave surface, a convex surface and a plane, and a convex surface, the prefabricated part can be retracted after being in place by the assembling equipment, and then a reinforced concrete structure is constructed;
and step 3 or step 4 also comprises a longitudinal connecting step of the prefabricated parts, and the longitudinal connection of the prefabricated parts adopts a mature connection scheme of a tongue-and-groove connection system, a socket connection system, a bolt connection system and a prestressed tendon connection system.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113668601A (en) * | 2021-07-22 | 2021-11-19 | 中铁八局集团昆明铁路建设有限公司 | Subway station assembly section construction method for open cut foundation pit steel support supporting system |
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2021
- 2021-03-30 CN CN202110339964.9A patent/CN112900495A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113668601A (en) * | 2021-07-22 | 2021-11-19 | 中铁八局集团昆明铁路建设有限公司 | Subway station assembly section construction method for open cut foundation pit steel support supporting system |
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