A large underground space construction system and construction method based on underpinning and concealed excavation

Abstract

The present invention provides a large-scale underground space construction system and construction method based on underpinning and concealed excavation, which relates to the field of building construction technology. The system includes a pipe-roof support system and a table formwork system. The pipe-roof support system is used to reinforce the upper, lower and side parts of the soil in the ruins area. A pipe-roof support structure is provided below the pipe-roof support system. The top of the pipe-roof support structure is supported below the pipe-roof support system, and the bottom of the pipe-roof support structure extends vertically downward. The table formwork system can be movably arranged below the pipe-roof support system, and after the table formwork system is moved into place, a space for pouring concrete is formed between the top of the table formwork system and the bottom of the pipe-roof support system. Thus, the shallow buried concealed excavation construction is completed by utilizing the pipe-roof support system and the pipe roof of the pipe-roof support system, and the construction of the main structure of the underground space is completed by the table formwork system. The construction system of the present invention is suitable for projects where open excavation of the basement is impossible and main structure construction is required, and the construction is safe and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a large-scale underground space construction system and a construction method based on underpinning and concealed excavation. Background Art

[0002] The applicant has discovered that the existing technology has at least the following technical problems: when existing underground structures pass through areas such as ruins where open excavation is not possible, underground excavation construction is required. However, traditional underground excavation projects require upper soil reinforcement, but grouting reinforcement cannot be performed in ruins areas, making construction difficult. Summary of the Invention

[0003] The present invention aims to provide a large-scale underground space construction system and method based on underpinning and concealed excavation, addressing the existing technical problem of the inability to reinforce the upper soil during construction in areas with archaeological sites. The various technical effects achieved by the preferred technical solution among the various technical solutions provided by the present invention are detailed below.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] The present invention provides a large-scale underground space construction system based on underpinning and concealed excavation, including a pipe-roof support system and a table formwork system. The pipe-roof support system is used to reinforce the upper, lower and side parts of the soil in the ruins area. A pipe-roof support structure is provided below the pipe-roof support system. The top of the pipe-roof support structure is supported below the pipe-roof support system, and the bottom of the pipe-roof support structure extends vertically downward. The table formwork system can be movably arranged below the pipe-roof support system, and after the table formwork system is moved into place, a space for pouring concrete is formed between the top of the table formwork system and the bottom of the pipe-roof support system.

[0006] According to a preferred embodiment, the pipe-roof support system includes a temporary support system, wherein the temporary support system includes micro-support piles arranged on both sides of the soil in the ruins area and a reinforcement component located on the upper part of the soil in the ruins area, and the reinforcement component includes a steel springboard laid on the upper part of the soil in the ruins area, and a locking I-beam is arranged on the upper side of the steel springboard, and the two ends of the locking I-beam are respectively connected to the micro-support piles on both sides.

[0007] According to a preferred embodiment, the pipe-roof support system further comprises a pipe-roof structure, which is arranged at the bottom of the soil in the ruins area and is used to support the soil in the upper ruins area;

[0008] The pipe roof support structure is arranged at the lower part of the pipe roof structure perpendicular to the pipe roof structure; and the pipe roof support structure and the pipe roof structure are connected by double-jointed I-beams.

[0009] According to a preferred embodiment, an underground space structure is formed below the pipe roof structure, and structural columns and structural plates are installed in the underground space structure. The upper and lower sides of the structural columns are respectively connected to the upper structural plate and the lower structural plate. The pipe roof support structure passes through the structural plate so that the upper structural plate and the lower structural plate are fixed in the basement.

[0010] According to a preferred embodiment, reserved steel bars are provided on the upper structural plate at positions corresponding to the structural columns, and the tops of the reserved steel bars extend upward perpendicularly to the upper surface of the upper structural plate.

[0011] According to a preferred embodiment, the height between the upper structural plate and the pipe roof structure is greater than the height of the table formwork system.

[0012] According to a preferred embodiment, the table formwork system includes a table formwork platform, a top plate located on the top of the table formwork platform, and a sliding support located at the bottom of the table formwork platform, wherein the sliding support can drive the table formwork platform and the top plate to move to a predetermined position below the pipe roof structure.

[0013] According to a preferred embodiment, the table formwork platform is a buckle rack.

[0014] According to a preferred embodiment, beam reinforcement bars corresponding to the positions of the reserved reinforcement bars are provided on the top plate and vertically downward for tying with the reserved reinforcement bars.

[0015] The present invention also provides a large underground space construction method based on underpinning and concealed excavation, comprising the following steps:

[0016] Micro-support piles were constructed along the extension direction of the soil on both sides of the site area; and a steel springboard was constructed on the top of the soil in the site area;

[0017] After the construction of the micro-support piles is completed, a crown beam is constructed at the upper end of the micro-support piles so that the top of the crown beam is higher than the soil of the ruins area, and the crown beams on both sides are connected by locking I-beams;

[0018] Construction of a pipe-roof support structure is carried out under the soil of the ruins area. After the construction of the pipe-roof support structure is completed, earthwork is excavated on both sides. After excavation reaches the construction elevation of the pipe-roof structure, the pipe-roof structure is inserted for construction. After the grouting of the pipe-roof structure is completed and the age is reached, the earthwork under the pipe-roof structure is excavated;

[0019] During the construction of the underground space structure, the structural columns and structural slabs are constructed within the underground space structure. After the construction reaches the basement top slab elevation, a table formwork system is set up on the upper part of the upper structural slab. The beam reinforcement is tied to the top slab of the table formwork system, and the table formwork system is slid to the predetermined position and fixed. Concrete is poured between the top of the table formwork system and the pipe roof structure.

[0020] The table formwork system was dismantled and the basement structure construction was completed.

[0021] Based on the above technical solution, the large-scale underground space construction system and construction method based on underpinning and concealed excavation of the present invention have at least the following technical effects:

[0022] The large-scale underground space construction system based on underpinning and concealed excavation of the present invention includes a pipe-roof support system and a table formwork system. The pipe-roof support system is used to reinforce the upper, lower and side parts of the soil in the ruins area. A pipe-roof support structure is provided below the pipe-roof support system. The top of the pipe-roof support structure is supported below the pipe-roof support system, and the bottom of the pipe-roof support structure extends vertically downward. The table formwork system can be movably arranged below the pipe-roof support system, and after the table formwork system is moved into place, a space for pouring concrete is formed between the top of the table formwork system and the bottom of the pipe-roof support system. Thus, the large-scale underground space construction system of the present invention utilizes the pipe-roof support system to complete the temporary support of the soil in the ruins area, the pipe-roof support system and the pipe-roof of the pipe-roof support system complete the shallow buried concealed excavation construction, and then the table formwork system is used to complete the construction of the main structure of the underground space structure. The construction system of the present invention is suitable for projects where open excavation of the basement is impossible and main structure construction is required, and the construction is safe and convenient.

[0023] On the other hand, in the construction method of an embodiment of the present invention, the table formwork system can be movably arranged under the pipe-roof support system after erection is completed, so that the top plate beam reinforcement can be tied before the table formwork system is moved to a predetermined position, thereby solving the problem that the top plate beam reinforcement cannot be tied. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 Schematic diagram of the construction working condition of micro-support piles in the large-scale underground space construction method based on underpinning and concealed excavation of the present invention;

[0026] Figure 2It is a top schematic diagram of a reinforcement assembly in the large-scale underground space construction method based on underpinning and concealed excavation of the present invention;

[0027] Figure 3 This is a schematic diagram of the construction working conditions of the pipe-roof support structure in the large-scale underground space construction method based on underpinning and concealed excavation according to the present invention;

[0028] Figure 4 It is a schematic diagram of the construction working condition of the pipe roof structure in the large-scale underground space construction method based on underpinning and concealed excavation of the present invention;

[0029] Figure 5 It is a schematic diagram of the earth excavation construction working condition in the large-scale underground space construction method based on underpinning and concealed excavation of the present invention;

[0030] Figure 6 It is a schematic diagram of the working condition of the structure of the basement excluding the top plate in the large-scale underground space construction method based on underpinning and concealed excavation of the present invention;

[0031] Figure 7 It is a schematic diagram of the construction working conditions of the platform formwork erection and beam reinforcement binding in the large-scale underground space construction method based on underpinning and concealed excavation of the present invention;

[0032] Figure 8 It is a schematic diagram of the construction working condition of the large-scale underground space construction method based on underpinning and concealed excavation of the present invention, in which the table formwork moves to the corresponding position and concrete is poured;

[0033] Figure 9 It is a schematic diagram of the working condition of the underground structure construction completed in the large-scale underground space construction method based on underpinning and concealed excavation of the present invention;

[0034] Figure 10 It is a schematic diagram of the working condition of the steel pipe pile head in the large underground space construction method based on underpinning and concealed excavation of the present invention.

[0035] In the figure: 1-micro support piles; 2-reinforcement components; 3-pipe roof support structure; 4-pipe roof structure; 5-structural columns; 6-upper structural plate; 7-lower structural plate; 8-reserved steel bars; 9-pipe mouth; 10-top plate; 11-formwork platform; 12-beam reinforcement; 13-sliding support; 14-double-jointed I-beam; 21-locking I-beam; 22-steel springboard. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] This embodiment provides a large-scale underground space construction system based on underpinning and concealed excavation, including a pipe-roof support system and a table formwork system. The pipe-roof support system is used to reinforce the upper, lower and side parts of the soil in the ruins area. A pipe-roof support structure 3 is provided below the pipe-roof support system. The top of the pipe-roof support structure 3 is supported below the pipe-roof support system, and the bottom of the pipe-roof support structure 3 extends vertically downward. Thus, shallow buried concealed excavation construction is completed using the pipe-roof support system and the pipe-roof support structure. The table formwork system can be movably arranged below the pipe-roof support system, and after the table formwork system is moved into place, a space for pouring concrete is formed between the top of the table formwork system and the bottom of the pipe-roof support system. Thus, the construction of the main structure is completed by the translation of the table formwork system. The construction system of the present invention can be used for projects where open excavation of the basement is impossible and main structure construction is required, and the construction is safe and convenient.

[0039] Preferably, the pipe-roof support system includes a temporary support system. Figure 1 or Figure 2 As shown, the temporary support system includes micro-support piles 1 installed on both sides of the site soil and a reinforcement assembly 2 located above the site soil. The reinforcement assembly 2 includes a steel springboard 22 installed above the site soil. A locking I-beam 21 is installed above the steel springboard 22, with the ends of the locking I-beam 21 connected to the micro-support piles 1 on either side. The I-beams act as anchors, thus forming a single structure for the micro-support piles on either side of the soil. Preferably, the micro-support piles 1 are micro-steel pipe piles. Multiple micro-steel pipe piles are arranged in a sequential, spaced arrangement along the length of the site soil. After construction is complete, a cap beam is installed at the top of each row of micro-steel pipe piles, with the top of the cap beam elevated above the site soil to connect the entire row of micro-steel pipe piles. The ends of the locking I-beam 21 connect to the cap beams on either side to form a single structure. During construction, the verticality of the micro-steel pipe piles must be ensured, and then transverse locking I-beams are used to connect the micro-support piles on both sides.

[0040] More preferably, Figure 4 As shown, the pipe-roof support system also includes a pipe-roof structure 4. The pipe-roof structure 4 is arranged at the bottom of the soil in the ruins area, and is used to support the soil in the upper ruins area; the pipe-roof structure is a reinforcement component at the bottom of the soil. Preferably, the pipe-roof structure 4 is welded to the micro-support piles 1 on both sides to form a whole, which ensures the stability of the soil. Preferably, the pipe-roof support structure 3 is arranged at the lower part of the pipe-roof structure 4 perpendicular to the pipe-roof structure 4; and the pipe-roof support structure 3 and the pipe-roof structure 4 are longitudinally connected by double-pieced I-beams 14. The pipe-roof support structure 3 is a steel pipe pile, which is supported at the lower part of the pipe-roof structure to support the pipe-roof structure, thereby ensuring the stability of the soil above the pipe-roof structure when the lower soil is excavated.

[0041] More preferably, Figure 6 As shown, an underground space structure is formed below the pipe-roof structure 4. Structural columns 5 and structural plates are installed in the underground space structure. The upper and lower sides of the structural columns 5 are respectively connected to the upper structural plates 6 and the lower structural plates 7. The pipe-roof support structure 3 passes through the structural plates so that the upper structural plates 6 and the lower structural plates 7 are fixed in the basement to form the underground space structure portion. Further preferably, a reserved steel bar 8 is provided on the upper structural plate 6 and at a position corresponding to the structural column 5. The top of the reserved steel bar 8 extends upward perpendicular to the upper surface of the upper structural plate 6. Further preferably, the height between the upper structural plate 6 and the pipe-roof structure 4 is greater than the height of the table formwork system. This allows the table formwork system to slide along the upper structural plate to a designated position at the lower part of the pipe-roof structure.

[0042] like Figure 7 As shown, the formwork system preferably includes a formwork platform 11, a top plate 10 located on top of the formwork platform 11, and a sliding support 13 located at the bottom of the formwork platform 11. Preferably, the formwork platform 11 is a buckle frame. The formwork system can be erected within the foundation pit according to the drawings and construction plan. A sliding support 13 is provided at the bottom of the formwork platform 11. The sliding support 13 is capable of moving the formwork platform 11 and the top plate 10 to a predetermined position below the pipe-roof structure 4. Beam reinforcement bars 12 are provided vertically downward on the top plate 10, corresponding to the positions of the reserved reinforcement bars 8, for tying to the reserved reinforcement bars 8. The beam reinforcement bars 12 are tied to the top plate 10 after the formwork platform is erected. After the beam reinforcement bars are tied to the top plate, the formwork platform is moved to the predetermined position using the sliding support. Once secured, the top plate concrete pouring construction proceeds. Preferably, the sliding support 13 can be a pulley moving system capable of adjusting the height. After the pulley is moved to a predetermined position, the table formwork platform is raised or lowered by the height-adjusting hydraulic system to meet the structural elevation requirements.

[0043] Example 2

[0044] This embodiment also provides a large underground space construction method based on underpinning and concealed excavation, and the construction process is as follows:

[0045] Preparation of materials----Construction of micro-support piles----Construction of pipe shed support piles----Construction of pipe shed----Excavation of earthwork----Construction of basement structure (except basement top slab)----Erection of table formwork, tying of top slab beam reinforcements----Putting table formwork in place---Concrete pouring----Removing formwork.

[0046] The specific steps include:

[0047] like Figure 1As shown, micro-support piles 1 are constructed in the extension direction on both sides of the soil in the heritage area to be protected; and a steel springboard 22 is constructed on the top of the soil in the heritage area;

[0048] After the construction of the micro-support pile 1 is completed, a crown beam is constructed at the upper end of the micro-support pile 1 and the top of the crown beam is made higher than the soil in the ruins area, and the crown beams on both sides are connected by locking I-beams 21 to form a whole; preferably, the verticality of the micro-support pile needs to be ensured during the construction process, and then the micro-support piles on both sides of the soil are connected using horizontal I-beams.

[0049] like Figure 3 As shown in FIG, at the same time, the pipe-roof support structure 3 is constructed under the soil of the ruins area. Figure 4 and Figure 5 As shown, after the construction of the pipe-roof support structure 3 is completed, earthwork is excavated on both sides. After excavation reaches the construction elevation of the pipe-roof structure 4, the pipe-roof structure 4 is inserted for construction. After the grouting of the pipe-roof structure is completed and the age is reached, the earthwork under the pipe-roof structure is excavated. Preferably, after the construction of the pipe-roof structure is completed, the pipe-roof structure and the pipe-roof support structure are longitudinally connected using double-jointed I-beams and placed on the pipe-roof support structure to ensure the stability of the upper soil. When excavating the soil under the pipe-roof structure, the retreat method should be used during the excavation process. The excavator is strictly prohibited from touching the upper pipe-roof structure and the pipe-roof support structure.

[0050] like Figure 6 As shown in the figure, the construction of underground space structure is completed. After the basement excavation is completed, the construction of other structures except the basement top plate is carried out, such as raft plate, negative second floor structure, etc. The structural columns and structural plates are constructed in the underground space structure. After the construction reaches the basement top plate elevation, as shown in the figure, the construction of underground space structure is completed. Figure 7 As shown, a table formwork system is set up on the upper part of the upper structure plate. The table formwork system is set up according to the construction drawings and plans, and beam reinforcement 12 is tied to the top plate of the table formwork system. Figure 8 As shown, the table formwork system is slid to a predetermined position and fixed, and concrete is poured between the top of the table formwork system and the pipe roof structure 4;

[0051] like Figure 9 and Figure 10 As shown, the table formwork system is finally dismantled to complete the basement structure construction. After the table formwork system is dismantled and the basement structure construction is completed, the pipe opening 9 of the pipe shed support structure needs to be sealed. The pipe opening 9 is located at the connection with the lower structural plate.

[0052] The construction method of the present invention is suitable for projects where open excavation of the basement is not possible and main structure construction is required, and the construction is safe and convenient. The present invention provides a shallow buried underground excavation construction method, which solves the technical problem of being unable to reinforce the upper soil during construction in areas with ruins. At the same time, after the underground excavation is completed, the construction method of the present invention provides a structural construction solution for the translation of the table formwork platform for the construction of underground space structures, which solves the problem of the inability to tie the top plate steel bars.

[0053] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front" and "back" are used interchangeably.

[0054] The directions or positional relationships indicated by “end”, “rear end”, “head”, “tail”, etc. are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction.

[0055] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and cannot be understood as indicating or suggesting relative importance.

[0056] In the description of the present invention, it should be noted that, unless otherwise specified and defined, the terms

[0057] "Installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be

[0058] The terms may be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0059] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A large underground space construction system based on underpinning and concealed excavation, characterized in that: The invention comprises a pipe-roof support system and a table formwork system, wherein the pipe-roof support system is used to reinforce the upper, lower and side parts of the soil in the ruins area, a pipe-roof support structure (3) is provided below the pipe-roof support system, the top of the pipe-roof support structure (3) is supported below the pipe-roof support system, and the bottom of the pipe-roof support structure (3) extends vertically downward, the table formwork system can be movably arranged below the pipe-roof support system, and after the table formwork system is moved into place, a space for pouring concrete is formed between the top of the table formwork system and the bottom of the pipe-roof support system, the pipe-roof support system also comprises a pipe-roof structure (4), the pipe-roof structure (4) is arranged at the bottom of the soil in the ruins area, and is used to support the soil in the upper ruins area; the pipe-roof support structure (3) is arranged at the bottom of the pipe-roof structure (4) perpendicularly to the pipe-roof structure (4); and the pipe-roof support structure (3) and the pipe-roof structure (4) are connected by double-jointed I-beams (14); An underground space structure is formed below the pipe-roof structure (4), and a structural column (5) and a structural plate are installed in the underground space structure. The upper and lower sides of the structural column (5) are respectively connected to an upper structural plate (6) and a lower structural plate (7); a reserved steel bar (8) is provided on the upper structural plate (6) and at a position corresponding to the structural column (5); the table formwork system includes a table formwork platform (11) and a top plate (10) located on the top of the table formwork platform (11); a beam steel bar (12) corresponding to the position of the reserved steel bar (8) is provided on the top plate (10) and vertically downward, for binding with the reserved steel bar (8).

2. The large underground space construction system according to claim 1, characterized in that: The pipe-roof support system comprises a temporary support system, wherein the temporary support system comprises micro-support piles (1) arranged on both sides of the soil in the ruins area and a reinforcement assembly (2) located on the upper part of the soil in the ruins area, the reinforcement assembly (2) comprising a steel springboard (22) laid on the upper part of the soil in the ruins area, a locking I-beam (21) being arranged on the upper side of the steel springboard (22), and the two ends of the locking I-beam (21) being respectively connected to the micro-support piles (1) on both sides.

3. The large underground space construction system according to claim 1, characterized in that: The pipe roof support structure (3) passes through the upper structural plate (6) and the lower structural plate (7) so that the upper structural plate (6) and the lower structural plate (7) are fixed in the basement.

4. The large underground space construction system according to claim 3, characterized in that: The top of the reserved steel bar (8) extends upward perpendicularly to the upper surface of the upper structural plate (6).

5. The large underground space construction system according to claim 4, characterized in that: The height between the upper structural plate (6) and the pipe roof structure (4) is greater than the height of the table formwork system.

6. The large underground space construction system according to claim 5, characterized in that: The table form system further comprises a sliding support (13) located at the bottom of the table form platform (11), wherein the sliding support (13) can drive the table form platform (11) and the top plate (10) to move to a predetermined position below the pipe roof structure (4).

7. The large underground space construction system according to claim 6, characterized in that: The table mold platform (11) is a buckle frame.

8. A large underground space construction method based on underpinning and concealed excavation, characterized in that: The process includes the following steps: Micro support piles (1) are constructed in the extension direction of the soil body on both sides of the site area; and a steel springboard (22) is constructed on the top of the soil body in the site area; After the construction of the micro-support pile (1) is completed, a crown beam is constructed at the upper end of the micro-support pile (1) so that the top of the crown beam is higher than the soil of the ruins area, and the crown beams on both sides are connected by locking I-beams (21); The pipe-roof support structure (3) is constructed at the bottom of the soil in the ruins area. After the construction of the pipe-roof support structure (3) is completed, the soil on both sides is excavated. After the excavation reaches the construction elevation of the pipe-roof structure (4), the pipe-roof structure (4) is inserted for construction. After the grouting of the pipe-roof structure is completed and the age is reached, the soil under the pipe-roof structure is excavated; Constructing the underground space structure, constructing the structural columns and structural plates in the underground space structure, and after the construction reaches the basement top plate elevation, setting up a table formwork system on the upper part of the upper structural plate, tying beam reinforcement (12) to the top plate of the table formwork system, and sliding the table formwork system to a predetermined position for fixing, and pouring concrete between the top of the table formwork system and the pipe roof structure (4); The table formwork system was dismantled and the basement structure construction was completed.

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