CN214301758U - Foundation pit support structure - Google Patents
Foundation pit support structure Download PDFInfo
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- CN214301758U CN214301758U CN202021823517.8U CN202021823517U CN214301758U CN 214301758 U CN214301758 U CN 214301758U CN 202021823517 U CN202021823517 U CN 202021823517U CN 214301758 U CN214301758 U CN 214301758U
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Abstract
The utility model provides a foundation pit retaining structure, including a plurality of steel pipes, the cement soil wall that application TRD worker method construction formed, each the steel pipe is vertical to be inserted in the cement soil wall, each the steel pipe is followed the length direction interval distribution of cement soil wall, each all it has the little expanded concrete to fill in the steel pipe. The utility model provides a foundation ditch retaining structure stagnant water nature is good, rigidity is big, applicable in deep basal pit engineering, and is economical reasonable. The utility model provides a foundation ditch retaining structure adopts the cement soil wall + interpolation steel pipe that TRD worker method construction formed to satisfy stagnant water and atress requirement, and the inside foam concrete that fills of steel pipe increases retaining structure bulk rigidity simultaneously, satisfies the foundation ditch requirement of warping. In the utility model discloses in, each the inner wall and the outer wall of steel pipe all coat and have the emollient layer, conveniently insert and extract the steel pipe, treat that the inner structure construction in the foundation ditch is accomplished the back, can extract the steel pipe, recycle behind the little expanded concrete of clearing away inside packing.
Description
Technical Field
The utility model relates to a foundation ditch engineering field especially relates to a foundation ditch retaining structure.
Background
With the continuous development of foundation engineering and road traffic engineering, the construction of foundation pit engineering is more and more extensive, and the construction mode of foundation pit engineering is also more and more diversified, can fully be applicable to the foundation pit construction under different environment.
The sealing-up closure of the deep foundation pit engineering enclosure structure in the water-rich sand layer area plays a crucial role in foundation pit safety, and the enclosure structures commonly used in the traditional deep foundation pit engineering have the following functions: underground continuous walls, SWM construction method piles, cast-in-situ bored piles and waterproof curtains and TRD inserted section steel. The building enclosure structure has the following defects in deep foundation pit engineering of a water-rich sand layer: the underground continuous wall is easy to collapse, and the joints of the underground continuous wall sections are easy to leak; the SMW construction method pile is not suitable for the engineering with larger depth of a foundation pit (such as the depth of the foundation pit is more than 12m), and the joint seam in the water-rich sand layer is easy to leak; the requirements of the bored pile and the waterproof curtain on the waterproof curtain are high, a good waterproof effect is difficult to obtain by adopting a common waterproof curtain (such as a three-axis stirring pile and a jet grouting pile), and a seam is easy to leak, so that the waterproof curtain is poor in economy and needs to occupy a large construction site by adopting TRD (blast furnace Top gas recovery device) as the waterproof curtain; although the TRD interpolation I-shaped steel has good water stopping performance, the TRD interpolation I-shaped steel is difficult to be used for engineering with larger foundation pit depth (for example, the foundation pit depth is greater than 12m) due to smaller rigidity of the section steel.
Therefore, there is a need for a new foundation pit enclosure structure to overcome the above problems
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect, provide a foundation ditch envelope, the stagnant water nature is good, rigidity is big, applicable in deep basal pit engineering, and is economical reasonable.
The utility model discloses a realize like this:
the utility model provides a foundation pit retaining structure, including a plurality of steel pipes, the cement soil wall that application TRD worker method construction formed, each the steel pipe is vertical to be inserted in the cement soil wall, each the steel pipe all include with the faying face that cement soil wall links to each other, each the steel pipe is followed the length direction interval distribution of cement soil wall, each all it has the micro-expansive concrete to all fill in the steel pipe.
Preferably, the steel pipes are uniformly distributed at intervals along the length direction of the cement-soil wall.
Preferably, each steel pipe comprises a cylindrical section and a circular truncated cone section, and the circular truncated cone section is located at the bottom of the steel pipe.
Preferably, the cylindrical section and the circular truncated cone section are communicated.
Preferably, the bottom of each of the steel pipes is sealed.
Preferably, the inner wall and the outer wall of each of the steel pipes are coated with a lubricant layer.
The utility model discloses following beneficial effect has:
1. the utility model provides a foundation ditch retaining structure stagnant water nature is good, rigidity is big, applicable in deep basal pit engineering, and is economical reasonable.
2. The utility model provides a foundation ditch retaining structure adopts the cement soil wall + interpolation steel pipe that TRD worker method construction formed to satisfy stagnant water and atress requirement, and the inside foam concrete that fills of steel pipe increases retaining structure bulk rigidity simultaneously, satisfies the foundation ditch requirement of warping.
3. In the utility model discloses in, each the inner wall and the outer wall of steel pipe all coat and have the emollient layer, conveniently insert and extract the steel pipe, treat that the inner structure construction in the foundation ditch is accomplished the back, can extract the steel pipe, recycle behind the little expanded concrete of clearing away inside packing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a top view of a foundation pit support structure provided by an embodiment of the present invention;
fig. 2 is a cross-sectional view of a-a in fig. 1 according to an embodiment of the present invention.
Shown in the figure: 1. a steel pipe; 2. a cement soil wall constructed by applying a TRD construction method; 3. micro-expansive concrete.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1-2, the embodiment of the utility model provides a foundation pit retaining structure, including a plurality of steel pipes 1, the cement soil wall 2 that the application TRD worker method construction formed, each steel pipe 1 is vertical to be inserted in cement soil wall 2, each steel pipe 1 all include with the faying face that cement soil wall 2 links to each other, each steel pipe 1 is followed the length direction interval distribution of cement soil wall 2, each all it has micro-expansion concrete 3 to fill in the steel pipe 1. The utility model provides a foundation ditch retaining structure stagnant water nature is good, rigidity is big, applicable in deep basal pit engineering, and is economical reasonable.
The utility model discloses in, the rigidity requirement of foundation ditch retaining structure has been guaranteed when using in combination of cement soil wall 2, steel pipe 1 and micro-expansion concrete 3 to satisfy foundation ditch retaining structure stagnant water requirement, applicable in the great engineering of foundation ditch degree of depth (if the foundation ditch degree of depth >12m), the embodiment of the utility model provides a foundation ditch retaining structure is with low costs, and economic benefits is good.
The utility model discloses in, each steel pipe 1 can extract after the construction is accomplished, used repeatedly in other foundation ditch envelope.
In this embodiment, the steel pipes 1 are uniformly distributed along the length direction of the cement-soil wall 2 at intervals, and are uniformly stressed and have better strength.
As shown in fig. 2, each steel tube 1 comprises a cylindrical section and a circular truncated cone section, the cylindrical section is communicated with the circular truncated cone section, micro-expansion concrete 3 is filled in the cylindrical section and the circular truncated cone section, and the circular truncated cone section is located at the bottom of the steel tube 1, so that the steel tube 1 can be conveniently inserted into the cement soil wall 2. The bottom of the circular table section is sealed.
In this embodiment, the inner wall and the outer wall of each steel pipe 1 are coated with a lubricant layer to facilitate the insertion and extraction of the steel pipe.
The TRD construction method is one of the commonly adopted construction methods for foundation pit construction, and is a construction process for inserting a cutting box which meets the design depth and is provided with a cutting chain and a cutter head into the ground, and injecting cement slurry into the ground to achieve the purpose of fully mixing and stirring with an original ground and forming a continuous wall with equal thickness underground while longitudinally cutting and transversely pushing the cutting box into a groove.
In the traditional TRD construction method, I-shaped steel is usually inserted into a cement soil wall, the supporting strength is relatively low, the method cannot be fully suitable for the construction of foundation pit engineering with high strength requirement, and is particularly difficult to be used for the engineering with high foundation pit depth (such as the foundation pit depth is more than 12 m). The utility model provides a foundation ditch envelope adopts the cement soil wall 2+ interpolation steel pipe 1 that TRD worker method construction formed to satisfy stagnant water and atress requirement, and 1 inside foam concrete of packing of steel pipe increases envelope bulk rigidity simultaneously, satisfies the foundation ditch requirement of warping.
The thickness of the cement soil wall 2 formed by the TRD construction method, the diameter of the steel pipe 1, the thickness of the steel pipe 1 and the distance between the steel pipes 1 can be selected according to actual stress analysis.
And (3) smearing a lubricant on the inner surface and the outer surface of the steel pipe 1, after the construction of the internal structure in the foundation pit is finished, pulling out the steel pipe 1, and recycling the micro-expansion concrete 3 filled in the steel pipe.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A foundation pit support structure is characterized in that: the concrete wall comprises a plurality of steel pipes and a cement wall constructed by applying a TRD construction method, wherein each steel pipe is vertically inserted into the cement wall, each steel pipe comprises a joint surface connected with the cement wall, the steel pipes are distributed at intervals along the length direction of the cement wall, micro-expansion concrete is filled in each steel pipe, each steel pipe comprises a cylindrical section and a circular truncated cone section, and the circular truncated cone section is positioned at the bottom of the steel pipe.
2. The foundation pit enclosure of claim 1 wherein: the steel pipes are uniformly distributed at intervals along the length direction of the cement-soil wall.
3. The foundation pit enclosure of claim 1 wherein: the cylindrical section is communicated with the circular truncated cone section.
4. The foundation pit enclosure of claim 1 wherein: and the bottom of each steel pipe is sealed.
5. The foundation pit enclosure of claim 1 wherein: and the inner wall and the outer wall of each steel pipe are coated with a lubricant layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021823517.8U CN214301758U (en) | 2020-08-27 | 2020-08-27 | Foundation pit support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021823517.8U CN214301758U (en) | 2020-08-27 | 2020-08-27 | Foundation pit support structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214301758U true CN214301758U (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021823517.8U Active CN214301758U (en) | 2020-08-27 | 2020-08-27 | Foundation pit support structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214301758U (en) |
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2020
- 2020-08-27 CN CN202021823517.8U patent/CN214301758U/en active Active
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