CN214738100U

CN214738100U - Go up and stride existing underground structure's foundation ditch envelope and newly-built structure

Info

Publication number: CN214738100U
Application number: CN202023262874.4U
Authority: CN
Inventors: 邓朝辉; 肖明清; 陈杰; 徐巍; 许洪伟; 黄胜; 杨辉
Original assignee: China Railway Siyuan Survey and Design Group Co Ltd
Current assignee: China Railway Siyuan Survey and Design Group Co Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-11-16
Anticipated expiration: 2030-12-29

Abstract

The utility model provides a stride existing underground structure's foundation ditch envelope and newly-built structure on, including working well and pipe curtain, the working well is located the both sides of existing underground structure, the working well of the both sides of existing underground structure is through two the pipe curtain is connected, just the pipe curtain includes two at least connecting pipes, the both ends of connecting pipe respectively with two the working well is connected, a plurality of in the pipe curtain the connecting pipe is followed along vertical direction the bottom of working well arrives the top of working well is arranged in proper order. The utility model provides an on stride existing underground structure's foundation ditch retaining structure and newly-built structure can not influence the vertical space of foundation ditch and can carry out better reinforcement to foundation ditch bottom stratum.

Description

Go up and stride existing underground structure's foundation ditch envelope and newly-built structure

Technical Field

The utility model relates to a foundation ditch enclosure technical field, in particular to go up and stride existing underground structure's foundation ditch enclosure and newly-built structure.

Background

In large cities with developed economies, underground works are increasingly being constructed. When the newly-built open cut underground structure needs to stride the existing underground structure, the depth of the enclosure structure inserted into the bottom of the foundation pit is limited, and the soil pressure provided by the inner side of the foundation pit is difficult to balance the water and soil pressure outside the pit. In the prior art, the soil body at the bottom of a pit is generally reinforced by a supporting structure so as to balance the water and soil pressure outside the foundation pit. However, the existing enclosure structure has the following problems:

1) when the existing enclosure structure is adopted, a certain distance needs to be pulled open between the newly-built structure and the existing structure, the general situation is 3m, however, when the vertical space of the foundation pit is limited, the existing foundation pit enclosure structure is difficult to meet the requirements.

2) When the existing foundation pit support structure is used for reinforcing the stratum at the bottom of the foundation pit, in order to avoid influencing the existing underground structure, pressure needs to be controlled when the existing foundation pit support structure is reinforced by adopting modes such as grouting, high-pressure rotary jet, deep layer stirring and the like, and the stratum at the bottom of the foundation pit has poor reinforcing effect and low reliability.

Therefore, a new foundation pit enclosure structure and a new structure which are spanned with the existing underground structure are needed to be developed, so that the bottom stratum of the foundation pit can be better reinforced while the vertical space of the foundation pit is not influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an upward stride existing underground structure's foundation ditch envelope and newly-built structure to solve the current vertical space that influences the foundation ditch that upward strides existing underground structure's foundation ditch envelope and newly-built structure and can not carry out better reinforced (rfd) problem to foundation ditch bottom stratum.

In order to solve the technical problem, the utility model provides a go up foundation ditch envelope of striding existing underground structure, including working well and pipe curtain, the working well is located the both sides of existing underground structure, the working well of the both sides of existing underground structure is through two the pipe curtain is connected, just the pipe curtain includes two at least connecting pipes, the both ends of connecting pipe respectively with two the working well is connected, a plurality of in the pipe curtain the connecting pipe is followed vertical direction and is followed the bottom of working well arrives the top of working well is arranged in proper order.

Optionally, the cross section of the connecting pipe is rectangular.

Optionally, the connecting pipe includes a steel pipe, a steel bar and concrete, and the steel bar and the concrete are disposed in the steel pipe.

Optionally, the working well reinforcing device further comprises a butt support, wherein the butt support is arranged in the working well and used for reinforcing the working well.

Optionally, still include ring frame roof beam, ring frame roof beam is located just set up in the working well all around the pipe curtain, be used for right the pipe curtain with the working well is consolidated.

Optionally, the anti-floating device further comprises an anti-floating pile, wherein the anti-floating pile is arranged at the bottom of the working well and connected with the working well.

Optionally, the depth of the pipe curtain from the existing underground structure is less than 3 meters.

The utility model also provides a new construction of striding existing underground structure on, stride existing underground structure's foundation ditch envelope on major structure and the foretell, the foundation ditch envelope that strides existing underground structure on sets up major structure is all around.

The utility model provides a pair of go up and stride existing underground structure's foundation ditch retaining structure and newly-built structure has following beneficial effect:

because a plurality of connecting pipes are arranged in order from the bottom of working well to the top of working well along vertical direction, consequently can form the pipe curtain that sets up from the bottom of working well to the top of working well. Because the working wells of the two sides of the existing underground structure are connected through two pipe curtains, the two ends of the connecting pipe are respectively connected with two working wells, so that the pipe curtains arranged from the bottom of the working wells to the top of the working wells can be connected with two working wells, and the working wells can form the enclosure structure of a foundation pit. Because the working well is located the both sides of existing underground structure, therefore the working well inserts the degree of depth of the bottom of foundation ditch is unrestricted, and the distance between pipe curtain and the existing underground structure also can be less than 3 meters, just the pipe curtain has better rigidity, consequently can carry out better reinforcement to the stratum of foundation ditch bottom, so can make the foundation ditch retaining structure who strides existing underground structure on the top can also carry out better reinforcement to foundation ditch bottom stratum when not influencing the vertical space of foundation ditch.

Drawings

Fig. 1 is a sectional view of a foundation pit enclosure that spans an existing underground structure upward in an embodiment of the present invention;

fig. 2 is a plan view of a foundation pit enclosure that spans an existing underground structure upward in an embodiment of the present invention;

fig. 3 is a sectional view of a pipe curtain in a foundation pit enclosure structure spanning an existing underground structure in an embodiment of the present invention;

fig. 4 is a schematic diagram of a new structure spanning an existing underground structure in the embodiment of the present invention.

Description of reference numerals:

110-a working well; 120-a tube curtain; 130-connecting tube; 140-opposite support; 150-ring frame beam; 160-uplift pile; 170-body construction; 180-existing underground structures.

Detailed Description

The following provides a detailed description of the foundation pit enclosure and the new structure of the existing underground structure with the upper span according to the present invention with reference to the accompanying drawings and the specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

The embodiment provides a foundation pit enclosure structure which spans an existing underground structure. Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is the embodiment of the present invention provides a cross-sectional view of a foundation pit enclosure that spans an existing underground structure, fig. 2 is the embodiment of the present invention provides a plan view of a foundation pit enclosure that spans an existing underground structure, fig. 3 is a cross-sectional view of a pipe curtain 120 in a foundation pit enclosure that spans an existing underground structure, the foundation pit enclosure that spans an existing underground structure includes a working well 110 and a pipe curtain 120. The working well 110 is located at two sides of an existing underground structure 180, the working wells 110 at two sides of the existing underground structure 180 are connected through two pipe curtains 120, the pipe curtains 120 include at least two connecting pipes 130, two ends of the connecting pipes 130 are respectively connected with the two working wells 110, and the connecting pipes 130 in the pipe curtains are sequentially arranged from the bottom of the working well 110 to the top of the working well 110 along the vertical direction.

Since the plurality of connection pipes 130 are sequentially arranged in the vertical direction from the bottom of the working well 110 to the top of the working well 110, the pipe curtain 120 disposed from the bottom of the working well 110 to the top of the working well 110 may be formed. Since the working wells 110 on both sides of the existing underground structure 180 are connected by two pipe sheets 120, and both ends of the connecting pipe 130 are connected to the two working wells 110, the two working wells 110 can be connected by the pipe sheets 120 disposed from the bottom of the working wells 110 to the top of the working wells 110, so that a foundation pit enclosure can be formed by the working wells 110 and the pipe sheets 120. Because the working well 110 is positioned at two sides of the existing underground structure 180, the depth of the working well 110 inserted into the bottom of the foundation pit is not limited, the distance between the pipe curtain 120 and the existing underground structure 180 can be less than 3 meters, and the pipe curtain 120 has better rigidity, so that the stratum at the bottom of the foundation pit can be better reinforced, and the foundation pit support structure which spans the existing underground structure can also better reinforce the stratum at the bottom of the foundation pit while not influencing the vertical space of the foundation pit. Wherein the working well 110 can serve as an anchoring structure for the tube sheet 120.

The connection pipe 130 has a rectangular cross-section.

The connection pipe 130 includes a steel pipe, a reinforcing bar, and concrete, and the reinforcing bar and the concrete are disposed inside the steel pipe. During manufacturing, steel bars are bound inside the steel pipes and concrete is poured to form the pipe curtain 120.

The foundation pit enclosure structure spanning the existing underground structure further comprises a butt brace 140, and the butt brace 140 is arranged in the working well 110 and used for reinforcing the working well 110. The counter support 140 can prevent the cross section of the working well 110 from being weakened and causing safety problems when the rectangular steel pipe is constructed.

The foundation pit support structure spanning the existing underground structure further comprises a ring frame beam 150, wherein the ring frame beam 150 is located in the working well 110 and arranged around the pipe curtain 120 and used for reinforcing the pipe curtain 120 and the working well 110. The ring frame beam 150 can prevent the cross section of the working well 110 from being weakened and causing safety problems when the rectangular steel pipe is constructed.

The foundation pit enclosure structure spanning the existing underground structure further comprises uplift piles 160, and the uplift piles 160 are arranged at the bottom of the working well 110 and connected with the working well 110.

The tube sheet 120 is less than 3 meters deep from the existing subterranean structure 180.

During construction, the uplift pile 160 disposed at the bottom of the working well 110 is constructed, and a cast-in-situ bored pile is generally used. Then, the working well 110 is constructed at both sides of the existing underground structure 180, and the uplift pile 160 and the working well 110 are reliably connected. Wherein the ring frame beam 150 and the pairs of the braces 140 need to be arranged in the working well 110 to ensure the safety of the subsequent construction steps. Then, a rectangular steel pipe is constructed through the working well 110, steel bars are bound in the rectangular steel pipe, concrete is poured to form a connecting pipe 130, two ends of the connecting pipe 130 are respectively connected with the working well, the connecting pipe 130 is sequentially constructed from the bottom of the working well 110 to the top of the working well 110 along the vertical direction to form a pipe curtain 120, and the pipe curtain 120 and the working well 110 are firmly connected to anchor the pipe curtain 120 through the working well 110. Subsequently, excavation of the foundation pit earth may be performed to construct the body structure 170.

The embodiment also provides a new construction spanning the existing underground structure. Referring to fig. 4, fig. 4 is a schematic diagram of a new structure spanning an existing underground structure in an embodiment of the present invention, where the new structure spanning the existing underground structure includes a main structure 170 and the above-mentioned foundation pit enclosure spanning the existing underground structure, and the foundation pit enclosure spanning the existing underground structure is disposed around the main structure 170.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims

1. The utility model provides a stride foundation ditch envelope of existing underground structure on, its characterized in that, includes working well and pipe curtain, the working well is located the both sides of existing underground structure, the working well of the both sides of existing underground structure is through two the pipe curtain is connected, just the pipe curtain includes two at least connecting pipes, the both ends of connecting pipe respectively with two the working well is connected, in the pipe curtain the connecting pipe is followed vertical direction and is followed the bottom of working well arrives the top of working well arranges in proper order.

2. The foundation pit enclosure spanning an existing underground structure of claim 1 wherein the connecting tube is rectangular in cross section.

3. The foundation pit enclosure spanning an existing underground structure of claim 1 wherein the connecting tube comprises steel tube, steel rebar and concrete, the rebar and the concrete disposed within the steel tube.

4. The foundation pit enclosure spanning an existing underground structure as claimed in claim 1 further comprising a diagonal brace disposed within the working well for reinforcing the working well.

5. The foundation pit enclosure structure spanning an existing underground structure as claimed in claim 1 further comprising a ring frame beam positioned within and around the pipe curtain for reinforcing the pipe curtain and the working well.

6. The foundation pit enclosure spanning an existing underground structure as claimed in claim 1 further comprising a uplift pile disposed at the bottom of the working well and connected to the working well.

7. The foundation pit enclosure spanning an existing underground structure of claim 1 wherein the pipe screen is less than 3 meters deep from the existing underground structure.

8. A new construction spanning an existing underground structure, comprising a main structure and a pit enclosure spanning an existing underground structure according to any one of claims 1 to 7, the pit enclosure spanning an existing underground structure being disposed around the main structure.