阅读说明：本技术 一种地下空间竖向拓建施工方法及结构 (Underground space vertical building construction method and structure ) 是由 程子聪 陈裕刚 沈蓉 沈雯 王新新 于 2019-09-12 设计创作，主要内容包括：本发明提供了一种地下空间竖向拓建施工方法及结构,通过在拓建区域即待拓建结构的下方设置加固土体,加固土体与原有地下结构的原围护紧密相连,通过在原围护的内侧设置新围护,在新围护与原围护的空隙内通过注浆加固形成围护结合体,新围护和围护结合体的顶部设置锁口梁,新立柱向下延伸至加固土体下方,新立柱向上延伸至原地下结构的顶板,从而使得新围护和新立柱得到稳固的支撑,进而可以使得整个施工过程在原地下结构及拓建结构内部完成,因此可以在尽量不影响已有建筑使用功能下进行竖向拓建,从而在环境影响最小情况下增大地下设施空间,满足居民日益增加的使用需求。且本发明的原围护和结构梁板能够最大程度上能够继续使用,拓建造价低。(The invention provides a vertical building construction method and a structure of underground space, which is characterized in that a reinforced soil body is arranged below a building area, namely a structure to be built, the reinforced soil body is tightly connected with an original enclosure of an original underground structure, a new enclosure is arranged at the inner side of the original enclosure, a space between the new enclosure and the original enclosure is reinforced by grouting to form an enclosure combination body, the top of the new enclosure and the enclosure combination body is provided with a locking notch beam, the new upright post extends downwards to the lower part of the reinforced soil body and extends upwards to the top plate of the original underground structure, so that the new enclosure and the new upright post are stably supported, further, the whole construction process can be completed in the in-situ structure and the built structure, so that the vertical building can be carried out under the condition of not influencing the use function of the existing building as much as possible, therefore, the underground facility space is enlarged under the condition of minimum environmental influence, and the increasing use requirements of residents are met. The original enclosure and structural beam plate can be continuously used to the maximum extent, and the construction cost is low.)

1. The utility model provides a vertical construction structure of building in underground space for realize the vertical building of original underground structure, its characterized in that includes: the new enclosure, the new upright post pile, the reinforced soil body, the opening locking beam, the expanded structural concrete top beam, the expanded structural bottom plate and the expanded structural beam plate, wherein the reinforced soil body is arranged below the expanded structure below the original underground structure, the new enclosure is arranged on the inner side of the original enclosure of the original underground structure, the new enclosure is connected with the reinforced soil body, grouting is carried out in a gap between the original enclosure and the new enclosure to reinforce and form an enclosure combination body, the new upright post extends downwards to the lower part of the reinforced soil body, the new upright post extends upwards to the top plate of the original underground structure, the opening locking beam is arranged at the top of the new enclosure and enclosure combination body, the opening locking beam is higher than the original underground structure bottom plate to be dismantled, the opening locking beam is connected with the opening locking beam, the expanded structural beam plate is arranged below the expanded structural concrete top beam, and the expanded structural bottom plate is arranged below the expanded structural beam plate, and the bottom plate of the building structure is arranged above the reinforced soil body.

2. The underground space vertical construction structure of claim 1, wherein the new envelope length is 2-2.2 times the depth of construction.

3. The underground space vertical construction structure according to claim 1, wherein the structural beam plates and the top plate of the original underground structure are correspondingly provided with soil-taking ports for transporting soil, and the soil-taking ports are sealed after the bottom plate of the construction structure is constructed.

4. The underground space vertical construction structure according to claim 1, wherein the new stud pile is fixed to a top plate of the underground structure by welding.

5. A vertical building construction method of underground space is used for carrying out vertical building on an original underground structure, and is characterized by comprising the following steps:

firstly, carrying out rotary spraying reinforcement from a bottom plate of an in-situ underground structure to the lower part of an area where a topological structure is located by adopting a rotary spraying grouting mode to form a reinforced soil body, so that the reinforced soil body is tightly connected with an original enclosure of the in-situ underground structure;

secondly, cutting the bottom plate of the original underground structure in blocks and constructing static pressure piles at the cutting parts to form new enclosures;

thirdly, grouting and reinforcing a gap between the original enclosure and the new enclosure by a jet grouting method to form an enclosure combination body;

fourthly, constructing a new upright pile downwards on a bottom plate of the in-situ underground structure, wherein the new upright pile is a static pressure steel pipe pile, and upwards extending the new upright pile to the lowest structure beam slab of the original underground structure, so that the new upright pile is fixed with the lowest structure beam slab of the in-situ underground structure;

fifthly, erecting a formwork on the top of the enclosure combination body and the new enclosure, pouring a concrete rectangular beam as a fore shaft beam, continuously extending the new upright post pile upwards to a top plate of the original underground structure, fixing the new upright post pile and the top plate of the original underground structure, and arranging soil taking ports which are aligned up and down on each layer of structural beam plates of the original underground structure;

sixthly, constructing a structural concrete top beam by erecting a formwork on the inner side of the fore shaft, cutting off a bottom plate of an original underground structure in blocks, and taking out the bottom plate through a soil taking opening;

step seven, after the maintenance of the concrete top beam of the in-situ built structure is finished, excavating the built area, taking out soil through a soil taking port on the in-situ structure, constructing each layer of structure beams of the built structure along with the excavation, and cutting off the upright piles of the in-situ structure when the excavation depth is close to the embedding depth of the upright piles of the original underground structure;

and step eight, when the bottom of the area where the topological structure is located is excavated, constructing and pouring a bottom plate of the topological structure on the inner side formwork of the new enclosure, closing a soil taking opening, constructing each layer of structural slab of the topological part from bottom to top until the top plate of the topological part is constructed, and completing the whole topological project.

6. The underground space vertical building construction method according to claim 5, wherein in the second step, the step of cutting the bottom plate of the original underground structure in blocks and constructing the static pressure pile at the cutting part adopts a block interval jumping construction method.

7. The underground space vertical building construction method according to claim 6, wherein in the second step, the length of each cutting part is 5-6 m, and the interval of each jump is 5-12 m.

8. The underground space vertical building construction method of claim 5, wherein the new envelope length is 2-2.2 times the building depth.

9. The underground space vertical building construction method according to claim 5, wherein in the first step, the reinforced soil body is reinforced in a full reinforcement mode.

10. The underground space vertical building construction method according to claim 5, wherein the new upright post is fixed with the beam plate of the lowest layer structure of the in-situ underground structure by welding, and the new upright post is fixed with the top plate of the in-situ underground structure by welding.

Technical Field

The invention relates to the field of underground space construction, in particular to a vertical underground space building construction method and structure.

Background

Along with the increasing population of cities in various centers, ground buildings can not meet the daily demands of residents far away, and commercial civil and municipal facilities such as shopping malls and subway stations gradually develop to underground deep layers. However, due to factors such as estimated pedestrian flow and capital cost, the space of the building under the initial construction time is often not considered for subsequent use, and the space design is too small to meet the use requirements after many years.

The common solution ideas mainly include two, one is to perform demolition and reconstruction, and the other is to perform horizontal demolition and reconstruction. The demolition and reconstruction cost is high, the construction period is long, and the original use function is lost in the reconstruction stage. However, whether the horizontal building adopts open excavation or underground excavation, the treatment of the connecting parts of the existing structure and the building structure is a technical difficulty, and the construction risk is high. Therefore, the invention provides a method and a structure for vertically building underground space, which improve the use efficiency of soil by increasing the built underground space layers.

Disclosure of Invention

The invention aims to provide a vertical underground space building construction method and structure, which can be used for vertically building an underground structure without influencing the use function of the existing building as much as possible, thereby increasing the underground facility space under the condition of minimum environmental influence and meeting the increasing use requirements of residents.

In order to solve the technical problems, the invention provides the following technical scheme:

the utility model provides a vertical construction structure of building in underground space for realize the vertical building of original underground structure, include: the new enclosure, the new upright post pile, the reinforced soil body, the opening locking beam, the expanded structural concrete top beam, the expanded structural bottom plate and the expanded structural beam plate, wherein the reinforced soil body is arranged below the expanded structure below the original underground structure, the new enclosure is arranged on the inner side of the original enclosure of the original underground structure, the new enclosure is connected with the reinforced soil body, grouting is carried out in a gap between the original enclosure and the new enclosure to reinforce and form an enclosure combination body, the new upright post extends downwards to the lower part of the reinforced soil body, the new upright post extends upwards to the top plate of the original underground structure, the opening locking beam is arranged at the top of the new enclosure and enclosure combination body, the opening locking beam is higher than the original underground structure bottom plate to be dismantled, the opening locking beam is connected with the opening locking beam, the expanded structural beam plate is arranged below the expanded structural concrete top beam, and the expanded structural bottom plate is arranged below the expanded structural beam plate, and the bottom plate of the building structure is arranged above the reinforced soil body.

Preferably, in the above underground space vertical extension construction structure, the new enclosure length is 2-2.2 times of the extension depth.

Preferably, in the above-mentioned underground space vertical construction structure, the structural beam slab and the top plate of the original underground structure are correspondingly provided with a soil-taking opening for transporting soil, and the soil-taking opening is sealed after the bottom plate of the construction structure is constructed.

Preferably, in the above-mentioned underground space vertical expansion construction structure, the new stud pile and a top plate of the original underground structure are fixed by welding.

The invention also discloses a vertical underground space building construction method, which is used for vertically building the original underground structure and comprises the following steps:

firstly, carrying out rotary spraying reinforcement from a bottom plate of an in-situ underground structure to the lower part of an area where a topological structure is located by adopting a rotary spraying grouting mode to form a reinforced soil body, so that the reinforced soil body is tightly connected with an original enclosure of the in-situ underground structure;

secondly, cutting the bottom plate of the original underground structure in blocks and constructing static pressure piles at the cutting parts to form new enclosures;

thirdly, grouting and reinforcing a gap between the original enclosure and the new enclosure by a jet grouting method to form an enclosure combination body;

fourthly, constructing a new upright pile downwards on a bottom plate of the in-situ underground structure, wherein the new upright pile is a static pressure steel pipe pile, and upwards extending the new upright pile to the lowest structure beam slab of the original underground structure, so that the new upright pile is fixed with the lowest structure beam slab of the in-situ underground structure;

fifthly, erecting a formwork on the top of the enclosure combination body and the new enclosure, pouring a concrete rectangular beam as a fore shaft beam, continuously extending the new upright post pile upwards to a top plate of the original underground structure, fixing the new upright post pile and the top plate of the original underground structure, and arranging soil taking ports which are aligned up and down on each layer of structural beam plates of the original underground structure;

sixthly, constructing a structural concrete top beam by erecting a formwork on the inner side of the fore shaft, cutting off a bottom plate of an original underground structure in blocks, and taking out the bottom plate through a soil taking opening;

step seven, after the maintenance of the concrete top beam of the in-situ built structure is finished, excavating the built area, taking out soil through a soil taking port on the in-situ structure, constructing each layer of structure beams of the built structure along with the excavation, and cutting off the upright piles of the in-situ structure when the excavation depth is close to the embedding depth of the upright piles of the original underground structure;

and step eight, when the bottom of the area where the topological structure is located is excavated, constructing and pouring a bottom plate of the topological structure on the inner side formwork of the new enclosure, closing a soil taking opening, constructing each layer of structural slab of the topological part from bottom to top until the top plate of the topological part is constructed, and completing the whole topological project.

Preferably, in the above-mentioned construction method for vertical extension of underground space, in the second step, the step of cutting the bottom plate of the original underground structure in blocks and constructing the static pressure pile at the cut part adopts a block interval jumping construction method.

Preferably, in the above underground space vertical expansion construction method, in the second step, the length of each cutting part is 5-6 m, and the interval of each jump is 5-12 m.

Preferably, in the above method for vertically constructing an underground space, the new envelope length is 2 to 2.2 times the extension depth.

Preferably, in the above method for vertically constructing an underground space, the size of the soil-taking opening is 2m × 2 m.

Preferably, in the above construction method for vertical extension of underground space, in the first step, the reinforcement of the reinforced soil body is performed in a full reinforcement manner.

Preferably, in the above method for vertically constructing an underground space, the new stud pile is fixed to a beam slab of a lowest layer of an in-situ underground structure by welding.

Preferably, in the above method for vertically constructing an underground space, the new stud pile is fixed to a top plate of an in-situ structure by welding.

According to the technical scheme disclosed above, compared with the prior art, the invention has the following beneficial effects:

the vertical extension construction method and structure of underground space provided by this embodiment fills the blank of horizontal extension method of underground space in soft soil area in China, by arranging reinforced soil body under the structure to be extended in the extension area, the reinforced soil body is closely connected with the original enclosure of the original underground structure, and by arranging new enclosure at the inner side of the original enclosure, forming an enclosure combination body in the gap between the new enclosure and the original enclosure by grouting reinforcement, the top of the new enclosure and enclosure combination body is provided with a locking notch beam, the new upright post extends downwards to the lower part of the reinforced soil body, the new upright post extends upwards to the top plate of the original underground structure, so that the new enclosure and the new upright post are stably supported, further the whole construction process can be completed in the original underground structure and the extension structure, the whole construction stage of the surrounding environment can be normally used, therefore the vertical extension can be performed without affecting the use function of the existing building as much as possible, therefore, the underground facility space is enlarged under the condition of minimum environmental influence, and the increasing use requirements of residents are met. In addition, the original enclosure and structural beam plate can be continuously used to the maximum extent, and the enclosure and structural beam plate is low in construction cost and environment-friendly.

Drawings

Fig. 1 is a first step structural schematic diagram of the underground space vertical topology construction method according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a second step of the underground space vertical building construction method according to the embodiment of the present invention.

Fig. 3 is a schematic view of a bottom plate cutting sequence of the original underground structure in step two of the underground space vertical building construction method according to the embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a third step of the underground space vertical topology construction method according to the embodiment of the present invention.

Fig. 5 is a structural schematic diagram of the underground space vertical topology construction method according to the fourth step of the embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a fifth step of the underground space vertical topology construction method according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a sixth step of the underground space vertical topology construction method according to an embodiment of the present invention.

Fig. 8 is a schematic structural view of a seventh step of the underground space vertical building construction method according to the embodiment of the present invention.

In the figure: 1-bottom plate of in-situ structure, 1 a-cutting part, 2-building structure, 3-reinforcing soil body, 4-new enclosure, 5-original enclosure, 6-enclosure combination, 7-bottom structure beam plate of in-situ structure, 8-new upright post pile, 9-fore shaft beam, 10-top plate of in-situ structure, 11-soil taking port, 12-top concrete beam of building structure, 13-upright post pile of in-situ structure, 14-bottom plate of building structure and 15-structural beam plate of building structure.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples. The technical contents and features of the present invention will be described in detail below with reference to the embodiments illustrated in the accompanying drawings. It is further noted that the drawings are in greatly simplified form and are not to precise scale, merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. For convenience of description, the directions of "up" and "down" described below are the same as the directions of "up" and "down" in the drawings, but this is not a limitation of the technical solution of the present invention.