CN116220747A - A large-scale underground space construction system and construction method based on underpinning and underground excavation - Google Patents

Abstract

The invention provides a large-scale underground space construction system and construction method based on underpinning and underground excavation, and relates to the technical field of building construction. The system includes a pipe shed support system and a formwork system. The pipe shed support system is used to reinforce the upper, lower and side parts of the soil in the ruins area, and a pipe shed support structure is provided below the pipe shed support system. The top of the pipe shed support structure is supported under the pipe shed support system, and the bottom of the pipe shed support structure extends vertically downwards. Finally, a space for pouring concrete is formed between the top of the table formwork system and the bottom of the pipe shed support system. Therefore, the shallow buried excavation construction is completed by using the pipe shed support system and the pipe shed of the pipe shed support system, and the construction of the main structure of the underground space is completed through the table formwork system. The construction system of the present invention is suitable for projects where the basement cannot be excavated and the construction of the main structure is required, and the construction is safe and convenient.

Description

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

technical field

The invention relates to the technical field of building construction, in particular to a large-scale underground space construction system and construction method based on underpinning and underground excavation.

Background technique

The applicant found that there are at least the following technical problems in the prior art: when the existing underground structure passes through the area where open excavation cannot be carried out, such as the ruins area, underground excavation construction is required, but the traditional underground excavation project needs to carry out upper soil reinforcement , but the ruins area cannot be reinforced by grouting, making construction difficult.

Contents of the invention

The purpose of the present invention is to provide a large-scale underground space construction system and construction method based on underpinning and underground excavation, so as to solve the technical problem in the prior art that the upper soil cannot be reinforced during the construction process in areas with ruins. The many technical effects that can be produced by the preferred technical solutions among the many technical solutions provided by the present invention are described in detail below.

To achieve the above object, the present invention provides the following technical solutions:

A large-scale underground space construction system based on underpinning and underground excavation provided by the present invention includes a pipe shed support system and a table formwork system. For reinforcement, a pipe shed support structure is provided below the pipe shed support system, the top of the pipe shed support structure is supported under the pipe shed support system, and the bottom of the pipe shed support structure is vertical Extending downwards, the table formwork system can be movably arranged under the pipe shed support system, and after the table formwork system is moved in place, the table formwork system and the pipe shed support A space for pouring concrete is formed between the bottom of the retaining system.

According to a preferred embodiment, the pipe shed 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 micro-support piles located on the upper part of the soil in the ruins area. Reinforcement assembly, the reinforcement assembly includes a steel springboard laid on the upper part of the soil in the ruins area, a locking I-beam is set on the upper side of the steel springboard, and the two ends of the locking I-beam are respectively connected to two The micro support piles on the side are connected.

According to a preferred embodiment, the pipe shed support system further includes a pipe shed 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;

The pipe shed support structure is vertically arranged at the lower part of the pipe shed structure; and the pipe shed support structure and the pipe shed structure are connected by double I-beams.

According to a preferred embodiment, an underground space structure is formed under the pipe shed structure, structural columns and structural plates are installed in the underground space structure, and the upper and lower sides of the structural columns are respectively connected with an upper structural plate and a lower structure The pipe shed supporting structure passes through the structural plate so that the upper structural plate and the lower structural plate are fixed in the basement.

According to a preferred embodiment, a reserved steel bar is provided on the upper structural plate at a position corresponding to the structural column, and the top of the reserved steel bar extends upward perpendicular to the upper surface of the upper structural plate.

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

According to a preferred embodiment, the table form system includes a table form platform, a top plate located at the top of the table form platform, and a sliding support located at the bottom of the table form platform, wherein the sliding support can drive the The table form platform and the top plate are moved to a predetermined position under the pipe shed structure.

According to a preferred embodiment, the table form platform is a buckle frame.

According to a preferred embodiment, a beam reinforcement corresponding to the position of the reserved reinforcement is arranged vertically downward on the top plate for binding with the reserved reinforcement.

The present invention also provides a large-scale underground space construction method based on underpinning and underground excavation, which includes the following steps:

Construction of micro support piles is carried out in the extension direction of both sides of the soil in the ruins area; construction of a steel springboard is carried out on the top of the soil in the ruins area;

After the construction of the miniature support piles is completed, crown beam construction is carried out at the upper opening of the miniature support piles and the top of the crown beams is higher than the soil in the ruins area, and the crown beams on both sides pass through the I-beams of the locks. make a connection;

The construction of the pipe shed support structure is carried out at the lower part of the soil in the site area. After the construction of the pipe shed support structure is completed, the earthwork excavation on both sides is carried out. After excavation reaches the construction elevation of the pipe shed structure, the pipe shed structure is inserted for construction. After the grouting of the pipe shed structure is completed and reaches the age, the earthwork under the pipe shed structure shall be excavated;

For the construction of the underground space structure, the structural columns and structural slabs are constructed in the underground space structure. After the construction reaches the elevation of the basement roof, a table formwork system is set up on the upper structural slab, beam steel bars are bound on the top slab of the table formwork system, and the table formwork The system slides to the predetermined position for fixing, and concrete is poured between the top of the formwork system and the pipe shed structure;

Remove the formwork system and complete the construction of the basement structure.

Based on the above-mentioned technical scheme, a large-scale underground space construction system and construction method based on underpinning and underground excavation of the present invention have at least the following technical effects:

The large-scale underground space construction system based on underpinning and underground excavation of the present invention includes a pipe shed support system and a formwork system. The pipe shed support system is used to reinforce the upper, lower and side parts of the soil in the ruins area. There is a pipe shed support structure under the support system, the top of the pipe shed support structure is supported under the pipe shed support system, the bottom of the pipe shed support structure extends vertically downwards, and the table formwork system can be movably set on the Below the shed 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 shed support system. Therefore, the large-scale underground space construction system of the present invention utilizes the pipe shed support system to complete the temporary support of the soil in the ruins area, and the pipe shed support system and the pipe shed support system of the pipe shed support system complete the shallow buried excavation construction, and then pass the platform The formwork system completes the construction of the main structure of the underground space structure. The construction system of the present invention is suitable for projects where the basement cannot be excavated and the construction of the main structure is required, and the construction is safe and convenient.

On the other hand, in the construction method of the embodiment of the present invention, the table formwork system is movably arranged under the pipe shed support system after erection, so that the binding of the roof beam reinforcement can be completed before the table formwork system moves to a predetermined position. Solved the problem that the roof girder reinforcement could not be bound.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the construction mode schematic diagram of miniature support pile in the large-scale underground space construction method based on underpinning and underground excavation of the present invention;

Fig. 2 is the top schematic view of the reinforcement assembly in the large-scale underground space construction method based on underpinning and underground excavation of the present invention;

Fig. 3 is a schematic diagram of the construction conditions of the pipe shed support structure in the large-scale underground space construction method based on underpinning and underground excavation of the present invention;

Fig. 4 is a schematic diagram of the construction conditions of the pipe shed structure in the large-scale underground space construction method based on underpinning and underground excavation of the present invention;

Fig. 5 is a schematic diagram of earthwork excavation construction conditions in the large-scale underground space construction method based on underpinning and underground excavation of the present invention;

Fig. 6 is a schematic diagram of the structure of the basement except the roof in the large-scale underground space construction method based on underpinning and underground excavation of the present invention;

Fig. 7 is a schematic diagram of the construction conditions of platform formwork erection and beam reinforcement binding in the large-scale underground space construction method based on underpinning and underground excavation of the present invention;

Fig. 8 is a schematic diagram of the construction conditions in which the formwork advances to the corresponding position and pours concrete in the large-scale underground space construction method based on underpinning and underground excavation of the present invention;

Fig. 9 is a schematic diagram of the completion of underground structure construction in the large-scale underground space construction method based on underpinning and underground excavation of the present invention;

Fig. 10 is a schematic diagram of the working conditions of the steel pipe pile head in the large-scale underground space construction method based on underpinning and underground excavation according to the present invention.

In the figure: 1-miniature support pile; 2-reinforcement components; 3-tube shed support structure; 4-pipe shed structure; 5-structural column; 6-upper structural plate; 7-lower structural plate; 8-reserved steel ; 9-nozzle; 10-roof; 11-tableform platform;

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

Example 1

This embodiment provides a large-scale underground space construction system based on underpinning and underground excavation, including a pipe shed support system and a table formwork system. The pipe shed support system is used to reinforce the upper, lower and side parts of the soil in the ruins area. A pipe shed support structure 3 is provided under the pipe shed support system, and the top of the pipe shed support structure 3 is supported on the pipe shed support. Below the protection system, the bottom of the pipe shed support structure 3 extends vertically downward. Thus, the shallow buried excavation construction can be completed by using the pipe shed support system and the pipe shed support structure. The table form system can be movably arranged under the pipe shed support system, and after the table form system is moved in place, a space for pouring concrete is formed between the top of the table form system and the bottom of the pipe shed support system. Therefore, the construction of the main structure is completed through the translation of the table formwork system. The construction system of the present invention can be used in projects where the basement cannot be cut open and the construction of the main structure is required, and the construction is safe and convenient.

Preferably, the pipe shed support system includes a temporary support system. As shown in Figure 1 or Figure 2, the temporary support system includes micro support piles 1 arranged on both sides of the soil in the ruins area and a reinforcement component 2 located on the upper part of the soil in the ruins area. The steel springboard 22 on the upper part of the soil body is provided with a locking I-beam 21 on the upper side of the steel springboard 22, and the two ends of the locking I-beam 21 are respectively connected with the miniature support piles 1 on both sides. Therefore, the I-beam is used as a tie, so that the micro support piles on both sides of the soil form a whole. Preferably, the micro support pile 1 is a micro steel pipe pile. A number of micro-steel pipe piles are arranged at intervals along the extension direction of both sides of the soil in the ruins area. After the construction is completed, a crown beam is set at the top of each row of micro-steel pipe piles. The top of the crown beam is higher than the soil in the ruins area. body in order to connect a whole row of micro-steel pipe piles. The two ends of the locking I-beam 21 are respectively connected to the crown beams on both sides to form an integral structure. During the construction process, it is necessary to ensure the verticality of the micro steel pipe piles, and then use the horizontal locking I-beam to connect the micro support piles on both sides.

Further preferably, as shown in FIG. 4 , the pipe shed support system further includes a pipe shed structure 4 . The pipe shed structure 4 is set at the bottom of the soil in the relics area, and is used to support the soil in the upper relics area; the pipe shed structure is a reinforcement component at the bottom of the soil. Preferably, the pipe shed structure 4 is welded with the micro support piles 1 on both sides to form a whole, which ensures the stability of the soil. Preferably, the pipe shed support structure 3 and the pipe shed structure 4 are vertically arranged at the lower part of the pipe shed structure 4; The pipe shed support structure 3 is a steel pipe pile, and the pipe shed support structure is supported at the lower part of the pipe shed structure to support the pipe shed structure and ensure the stability of the upper soil of the pipe shed structure when the lower soil body is excavated.

Further preferably, as shown in FIG. 6 , an underground space structure is formed under the pipe shed structure 4 . Structural columns 5 and structural panels are installed in the underground space structure. The upper and lower sides of the structural column 5 are respectively connected with an upper structural plate 6 and a lower structural plate 7, and the pipe shed support structure 3 passes through the structural plate so that the upper structural plate 6 and the lower structural plate 7 are fixed in the basement to form an underground space structure . Further preferably, a reserved steel bar 8 is provided on the upper structural plate 6 at a position corresponding to the structural column 5 , and 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 shed structure 4 is greater than the height of the table formwork system. So that the table formwork system can slide along the upper structural plate to the lower designated position of the pipe shed structure.

As shown in FIG. 7 , further preferably, the table form system includes a table form platform 11 , a top plate 10 located on the top of the table form platform 11 , and a sliding support 13 located at the bottom of the table form platform 11 . Preferably, the formwork platform 11 is a buckle rack. The erection of the table formwork system can be carried out in the foundation pit according to the drawings and construction plan. A sliding support 13 is provided at the bottom of the table form platform 11 . The sliding support 13 can drive the formwork platform 11 and the top plate 10 to move to a predetermined position under the pipe shed structure 4 . Beam steel bars 12 corresponding to the positions of the reserved steel bars 8 are arranged vertically downward on the roof 10 for binding with the reserved steel bars 8 . Wherein, the binding of the beam reinforcement 12 on the top plate 10 is performed after the table formwork platform is erected. After the beam reinforcement binding of the roof is completed, the formwork platform is sent to the predetermined position by the sliding support. After being fixed, the roof concrete pouring construction will be carried out. Preferably, the sliding support 13 can be a height-adjustable pulley moving system. After the pulley is moved to a predetermined position, the table form platform is raised or lowered by a height-adjusting hydraulic system to meet the structural elevation requirements.

Example 2

This embodiment also provides a large-scale underground space construction method based on underpinning and underground excavation. The construction process is as follows:

Preparation of materials----micro support pile construction----pipe shed support pile construction----pipe shed construction----earth excavation----basement structure construction (except the basement roof)--- -Establishment of table formwork, tying of roof girder steel bars----table formwork in place---concrete pouring----formwork removal.

Specifically include the following steps:

As shown in Figure 1, carry out the construction of miniature support pile 1 in the extension direction of both sides of the soil body in the ruins area to be protected; and carry out the construction of steel springboard 22 on the top of the soil body in the ruins area;

After the construction of the micro support pile 1 is completed, the crown beam construction is carried out at the upper opening of the micro support pile 1 and the top of the crown beam is higher than the soil in the ruins area, and the crown beams on both sides are carried out through the lock I-beam 21. Connection; forming a whole; preferably, the verticality of the micro support piles needs to be ensured during the construction process, and then the micro support piles on both sides of the soil body are connected by horizontal I-beams.

As shown in Figure 3, at the same time, the construction of the pipe shed support structure 3 is carried out at the lower part of the soil in the ruins area. As shown in Figure 4 and Figure 5, after the construction of the pipe shed support structure 3 is completed, the earthwork excavation on both sides is carried out, and after the excavation reaches the construction elevation of the pipe shed structure 4, the pipe shed structure 4 is inserted for construction. After the slurry is completed and reaches the age, excavate the earthwork under the pipe shed structure; preferably, after the construction of the pipe shed structure is completed, the pipe shed structure and the pipe shed support structure need to be connected longitudinally with double I-beams, and placed in the pipe shed The support structure ensures the stability of the upper soil. When excavating the soil below the pipe shed structure, the excavation process should be excavated by the step-back method, and the excavator is strictly prohibited from touching the upper pipe shed structure and the pipe shed support structure.

As shown in Figure 6, for the construction of the underground space structure, after the excavation of the basement is completed, the construction of other structures other than the basement roof, such as rafts and negative second-floor structures, will be carried out. Structural columns and structural slabs are constructed in the underground space structure. After the construction reaches the elevation of the basement roof, as shown in Figure 7, a table formwork system is erected on the upper structural slab. The table formwork system is erected according to the construction drawings and plans. The top plate binding beam reinforcement 12 of the system. As shown in Figure 8, the table formwork system is slid to a predetermined position for fixing, and concrete is poured between the top of the table formwork system and the pipe shed structure 4;

As shown in Figures 9 and 10, the formwork system is finally removed to complete the construction of the basement structure. When the construction of the basement structure is completed after the removal of the table formwork system, the nozzle 9 of the pipe shed support structure needs to be blocked. The nozzle 9 is located at the connection with the lower structural plate.

The construction method of the present invention is suitable for the project where the basement cannot be cut open and requires the construction of the main structure, and the construction is safe and convenient. The invention provides a construction method for shallow burial and underground excavation, which solves the technical problem that the upper soil body cannot be reinforced during the construction process in the area with ruins. Simultaneously, the construction method of the present invention provides a structural construction plan for the translation of the formwork platform for the construction of the underground space structure after the underground excavation is completed, so as to solve the problem that the roof reinforcement cannot be bound.

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

The orientation or positional relationship indicated by "end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation and therefore not

It can be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms

"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

directly or indirectly through an intermediary. For those skilled in the art, 5 can understand the specific meanings of the above terms in the present invention according to specific situations.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1. A large-scale underground space construction system based on underpinning and underground excavation, characterized in that it comprises a pipe shed support system and a table formwork system, and said pipe shed support system is used for the upper, lower and The side is reinforced, and a pipe shed support structure (3) is provided below the pipe shed support system, and the top of the pipe shed support structure (3) is supported below the pipe shed support system. The bottom of the pipe shed support structure (3) extends vertically downwards, and the table formwork system can be movably arranged under the pipe shed support system, and after the table formwork system is moved in place, the A space for pouring concrete is formed between the top of the table formwork system and the bottom of the pipe shed support system. 2. The large-scale underground space construction system according to claim 1, characterized in that, the pipe shed support system includes a temporary support system, wherein the temporary support system includes Miniature support piles (1) and reinforcement components (2) located on the upper part of the soil in the ruins area, the reinforcement components (2) include a steel springboard (22) laid on the upper part of the soil in the ruins area, and the steel springboard Locking I-beams (21) are arranged on the upper side of (22), and the two ends of the locking I-beams (21) are respectively connected with the miniature support piles (1) on both sides. 3. The large-scale underground space construction system according to claim 2, characterized in that, the pipe shed support system also includes a pipe shed structure (4), and the pipe shed structure (4) is arranged on the soil of the ruins area. The bottom of the body is used to support the soil in the upper ruins area; The pipe shed support structure (3) is arranged at the lower part of the pipe shed structure (4) perpendicular to the pipe shed structure (4); and between the pipe shed support structure (3) and the pipe shed The structures (4) are connected by double I-beams (14). 4. The large-scale underground space construction system according to claim 3, characterized in that, an underground space structure is formed below the pipe shed structure (4), and a structural column (5) and a structure are installed in the underground space structure plate, the upper and lower sides of the structural column (5) are respectively connected with an upper structural plate (6) and a lower structural plate (7), and the pipe shed support structure (3) passes through the structural plate so that the upper structure Plate (6) and lower structural plate (7) are fixed in the basement. 5. The large-scale underground space construction system according to claim 4, characterized in that, on the upper structural plate (6) and corresponding to the position of the structural column (5), a reserved steel bar (8) is provided, so that The top of the reserved reinforcing bar (8) extends upward perpendicular to the upper surface of the upper structural plate (6). 6. The large-scale underground space construction system according to claim 5, characterized in that the height between the upper structural plate (6) and the pipe shed structure (4) is greater than the height of the table formwork system. 7. large-scale underground space construction system according to claim 6, is characterized in that, described formwork system comprises formwork platform (11), is positioned at the roof (10) of described formwork platform (11) top and is positioned at The sliding support (13) at the bottom of the table formwork platform (11), wherein the sliding support (13) can drive the table formwork platform (11) and the top plate (10) to move to the pipe shed structure (4 ) below the intended location. 8. The large-scale underground space construction system according to claim 7, characterized in that, the formwork platform (11) is a buckle rack. 9. The large-scale underground space construction system according to claim 7, characterized in that, on the roof (10) and vertically downward, there is a beam reinforcement (12) corresponding to the position of the reserved reinforcement (8). ), for binding with the reserved steel bar (8). 10. A large-scale underground space construction method based on underpinning and underground excavation, characterized in that it comprises the following steps: Carry out the construction of miniature support piles (1) in the extension direction of both sides of the soil body in the ruins area; and carry out the construction of the steel springboard (22) on the top of the soil body in the ruins area; After the construction of the micro support piles (1) is completed, crown beam construction is carried out at the upper opening of the micro support piles (1) and the top of the crown beams is higher than the soil in the ruins area, and the crown beams on both sides Connect by locking I-beam (21); The construction of the pipe shed support structure (3) is carried out at the lower part of the soil in the ruins area. After the construction of the pipe shed support structure (3) is completed, the earthwork on both sides is excavated to the construction elevation of the pipe shed structure (4). Then insert the pipe shed structure (4) for construction, and after the grouting of the pipe shed structure is completed and reaches the age, dig out the earthwork under the pipe shed structure; For the construction of the underground space structure, the structural columns and structural slabs are constructed in the underground space structure. After the construction reaches the elevation of the basement roof, a table formwork system is set up on the top of the upper structural slab, and the beam reinforcement (12) is bound on the roof of the table formwork system. sliding the table formwork system to a predetermined position for fixing, pouring concrete between the top of the table formwork system and the pipe shed structure (4); Remove the formwork system and complete the construction of the basement structure.

Images