CN214940184U - Foundation pit support structure with adjustable pressure - Google Patents
Foundation pit support structure with adjustable pressure Download PDFInfo
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- CN214940184U CN214940184U CN202023296331.4U CN202023296331U CN214940184U CN 214940184 U CN214940184 U CN 214940184U CN 202023296331 U CN202023296331 U CN 202023296331U CN 214940184 U CN214940184 U CN 214940184U
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- steel pipe
- anchor
- section
- foundation pit
- waist rail
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 68
- 239000010959 steel Substances 0.000 claims abstract description 68
- 238000004873 anchoring Methods 0.000 claims abstract description 14
- 238000007596 consolidation process Methods 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 claims abstract description 11
- 238000007569 slipcasting Methods 0.000 claims abstract description 10
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 4
- 239000004567 concrete Substances 0.000 claims description 5
- 239000002689 soil Substances 0.000 abstract description 22
- 239000004568 cement Substances 0.000 abstract description 12
- 238000010276 construction Methods 0.000 abstract description 10
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 230000006378 damage Effects 0.000 abstract description 4
- 238000003756 stirring Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 239000011440 grout Substances 0.000 description 3
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a foundation pit retaining structure with adjustable pressure, which belongs to the technical field of construction engineering construction and comprises a retaining pile, a waist beam, a double-acting cylinder, a connecting rod, an anchor pier, a steel pipe, a grouting hole, an anchoring section, a consolidation body and a filler; the anchor pier is of a post-cast reinforced concrete structure; the fender pile is connected through the anchor mound with the steel pipe, and the waist rail is connected with the fender pile, and the waist rail passes through flange joint with two effect jars, and two effect jars pass through flange joint with the connecting rod, and the connecting rod passes through welded connection with the steel pipe, and the steel pipe is close to anchor section one end and is provided with the end plate, passes through welded connection between steel pipe and the anchor section, is provided with the slip casting hole on the anchor section, and anchor section inside and surface bond have the consolidation body, and the steel pipe is interior to bond to have the filler. The utility model enables the coupling of the anchoring section and the surrounding cement soil to be more cooperative and provides higher bearing capacity; through setting up two effect cylinders, can be through applying external force, make the steel pipe remain stable, the destruction of buckling does not appear.
Description
Technical Field
The utility model relates to a building engineering construction technical field, in particular to foundation ditch retaining structure with adjustable pressure.
Background
With the pace of the urbanization process in China being accelerated, the development and utilization of underground space are developed rapidly, foundation pit engineering is more and more common, and therefore foundation pit enclosure wall structures and implementation processes are continuously developed. The foundation pit engineering is temporary enclosure and only plays a role in the basement excavation stage, so that the factors of the surrounding environment, the structural safety, the engineering cost, the construction convenience, the construction period and the like are generally comprehensively considered.
The foundation pit enclosure engineering includes gravity type, inclined pull type, parallel bracing type, inclined throwing bracing type and the like. The inclined throwing support type foundation pit support structure is a foundation pit support structure which is quite reliable theoretically, and a triangular structure is formed among the inclined throwing support, the support wall and the ground. Usually, a retaining wall is driven into a soil body, a pit is dug on one side of the retaining wall, a bracket supporting point is manufactured in the excavated space, and an inclined throwing support is installed between the bracket supporting point and the retaining wall in an installation mode of cast-in-place or welding and the like to form foundation pit support. However, the inclined throwing support structure is supported on a bottom plate of an underground structure, soil must be reserved and slope must be set firstly, and a bottom plate at the inclined throwing support supporting position must be excavated to form a supporting point, so that the waterproof problem is caused by the fact that a post-cast strip needs to be arranged on the bottom plate of the underground structure. The key point is that the soil remaining area is located below the inclined throwing support, and soil is difficult to dig and transport in the area, so that the application of the support structure is hindered by the increased construction period and cost.
The technical proposal of the Chinese utility model patent with the publication number of CN205822200U is as follows: the concrete foundation pit supporting structure comprises a cement soil stirring body constructed in an inclined mode, a steel pipe placed in an inclined mode, and a soil stirring head and the upper portion of the steel pipe are connected in four parts, wherein the cement soil stirring body is of an inclined strip-shaped structure which is formed in a soil body through stirring and cement doping and then is solidified, one part of the steel pipe is placed in the cement soil stirring body in an inclined mode, the soil stirring head is connected with the steel pipe, and the upper portion of the steel pipe is connected with a component which is used for firmly connecting the steel pipe with a foundation pit retaining pile or a wall. This patent utilizes compound steel pipe to insert the soil cement mixing pile and forms the inclined throwing brace, has solved and has set up the problem that the strong point leads to waterproof construction difficulty at the bottom plate to need not set up and stay the soil district, and the tie rod has strengthened the support intensity of steel pipe. However, steel pipe length overlength will certainly produce the inflection, and the stability of steel pipe becomes the short slab of supporting construction unstability, and in addition, in the steel pipe disect insertion cemented soil, because the steel pipe surface is comparatively smooth, and the skew is thrown and is propped mainly to lean on the side frictional resistance between steel pipe and the cemented soil and provide the support, consequently in order to solve above-mentioned problem, the utility model provides a foundation ditch envelope with adjustable pressure.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem who exists among the prior art, the utility model provides a foundation ditch envelope with adjustable pressure has overcome the not enough of prior art. By grouting behind the anchoring section, the contact area between the anchoring section and the surrounding cement soil is increased, the traditional failure mode is changed, the coupling between the anchoring section and the surrounding cement soil is more cooperative, and higher bearing capacity is provided; the double-acting cylinder not only reduces the deflection deformation of the steel pipe, but also can keep the steel pipe stable by applying external force without buckling damage.
The utility model provides a foundation ditch envelope with adjustable pressure which characterized in that: comprises a fender post, a waist beam, a double-acting cylinder, a connecting rod, an anchor pier, a steel pipe, a grouting hole, an anchoring section, a consolidation body and a filler; the anchor pier is of a post-cast reinforced concrete structure; the fender pile is connected through the anchor mound with the steel pipe, and the waist rail is connected with the fender pile, and the waist rail passes through flange joint with two effect jars, and two effect jars pass through flange joint with the connecting rod, and the connecting rod passes through welded connection with the steel pipe, and the steel pipe is close to anchor section one end and is provided with the end plate, passes through welded connection between steel pipe and the anchor section, is provided with the slip casting hole on the anchor section, and anchor section inside and surface bond have the consolidation body, and the steel pipe is interior to bond to have the filler.
Preferably, the waist rail is double-spliced I-steel, the waist rail is located the intermediate position of fender pile top to foundation ditch bottom surface distance, and the longitudinal length of waist rail is greater than the distance between two adjacent fender piles at least, the lower part welding that the fender pile one side was kept away from to the waist rail has the support, and the tip overlap joint of double-acting cylinder is on the support.
Preferably, the diameter of steel pipe is 150mm ~300mm, and the wall thickness of steel pipe is 2mm ~5mm, the steel pipe is close to the end plate of anchor section one end and reserves the round hole, and the diameter of round hole is greater than 2mm ~3mm of slip casting pipe diameter.
Preferably, the cross section of the anchor pier is triangular, and the central axis of the steel pipe is perpendicular to the hypotenuse of the triangle.
Preferably, the compression strength of the consolidation body is not less than 5MPa, and the filler is a hemispherical concrete structure. The utility model discloses the beneficial technological effect who brings:
(1) by grouting behind the anchoring section, the contact area between the anchoring section and the surrounding cement soil is increased, the traditional failure mode is changed, the coupling between the anchoring section and the surrounding cement soil is more cooperative, and higher bearing capacity is provided; (2) the double-acting cylinder not only reduces the deflection deformation of the steel pipe, but also can keep the steel pipe stable by applying external force without buckling damage.
Drawings
Fig. 1 is the utility model relates to a pressure-adjustable structure schematic diagram after foundation pit retaining structure completes.
Fig. 2 is the utility model relates to a foundation ditch envelope structure schematic diagram before completion with adjustable pressure.
Wherein, 1-fender pile, 2-waist beam, 3-double-acting cylinder, 4-connecting rod, 5-anchor pier, 6-steel pipe, 7-grouting pipe, 8-grouting hole, 9-anchoring section, 10-consolidation body and 11-filler.
Detailed Description
The invention is described in further detail below with reference to the following figures and detailed description:
example 1:
as shown in FIGS. 1-2, a foundation pit support structure with adjustable pressure, its characterized in that: the device comprises a fender post 1, a waist beam 2, a double-acting cylinder 3, a connecting rod 4, an anchor pier 5, a steel pipe 6, a grouting pipe 7, a grouting hole 8, an anchoring section 9, a consolidation body 10 and a filler 11; the anchor pier 5 is of a post-cast reinforced concrete structure; fender pile 1 is connected through anchor pier 5 with steel pipe 6, wale 2 is connected with fender pile 1, wale 2 passes through flange joint with two effect jar 3, two effect jar 3 pass through flange joint with connecting rod 4, connecting rod 4 passes through welded connection with steel pipe 6, steel pipe 6 is close to 9 one ends of anchor section and is provided with the end plate, pass through welded connection between steel pipe 6 and the anchor section 9, be provided with slip casting hole 8 on the anchor section 9, anchor section 9 is inside to have consolidation 10 with surface bonding, it has filler 11 to bond in the steel pipe 6.
Preferably, waist rail 2 is the double pin I-steel, and waist rail 2 is located the intermediate position of fender pile 1 pile bolck to foundation ditch bottom surface distance, and waist rail 2's longitudinal length is greater than the distance between two adjacent fender piles 1 at least, the lower part welding of waist rail 2 far away from fender pile 1 one side has the support, and the tip overlap joint of two effect cylinders 3 is on the support.
Preferably, the diameter of the steel pipe 6 is 150mm ~300mm, and the wall thickness of the steel pipe 6 is 2mm ~5mm, the steel pipe 6 is reserved with the round hole on the end plate that is close to the 9 one ends of anchor section, and the diameter of round hole is greater than 2mm ~3mm of slip casting pipe 7 diameter.
Preferably, the cross section of the anchor pier 5 is triangular, and the central axis of the steel pipe 6 is perpendicular to the hypotenuse of the triangle.
Preferably, the compressive strength of the solidification body 10 is not less than 5MPa, and the filler 11 is a hemispherical concrete structure. Example 2:
as shown in fig. 1-2, adopt a pressure adjustable foundation pit retaining structure carry out following construction, at first form the steel pipe and plant the hole through the methods construction such as whirl spraying or stirring, plant steel pipe 6 in the steel pipe and plant the hole, pour grout into anchor section 9 through slip casting pipe 7, grout flows into the anchor section 9 outside through slip casting hole 8 and forms consolidation 10, after the grout reaches the initial set, extract slip casting pipe 7, pour the mixture of concrete and rubble into steel pipe 6, pour anchor mound 5 simultaneously, will enclose fender pile 1 and steel pipe 6 and be connected together; after the maintenance age is reached, excavating a soil body in a foundation pit, anchoring a waist beam 2 on a fender pile 1 when excavating to the middle position of the distance from the pile top of the fender pile 1 to the bottom surface of the foundation pit, welding a connecting rod 4 at the corresponding position of a steel pipe 6, connecting the waist beam 2 with the connecting rod 4 by using a double-acting cylinder 3, continuously excavating the foundation pit until the design depth is reached, and applying external force through the double-acting cylinder 3 if the steel pipe 6 slightly bends after the excavation process and the excavation are finished so as to keep the steel pipe 6 in a stable state.
The utility model relates to a foundation pit retaining structure with adjustable pressure, through slip casting behind the anchor section, increased the area of contact of anchor section and surrounding cement soil, changed traditional failure mode, make the coupling of anchor section and surrounding cement soil more in coordination, provide higher bearing capacity; the double-acting cylinder not only reduces the deflection deformation of the steel pipe, but also can keep the steel pipe stable by applying external force without buckling damage.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention also belong to the protection scope of the present invention.
Claims (5)
1. The utility model provides a foundation ditch envelope with adjustable pressure which characterized in that: comprises a fender post, a waist beam, a double-acting cylinder, a connecting rod, an anchor pier, a steel pipe, a grouting hole, an anchoring section, a consolidation body and a filler; the anchor pier is of a post-cast reinforced concrete structure; the fender pile is connected through the anchor mound with the steel pipe, and the waist rail is connected with the fender pile, and the waist rail passes through flange joint with two effect jars, and two effect jars pass through flange joint with the connecting rod, and the connecting rod passes through welded connection with the steel pipe, and the steel pipe is close to anchor section one end and is provided with the end plate, passes through welded connection between steel pipe and the anchor section, is provided with the slip casting hole on the anchor section, and anchor section inside and surface bond have the consolidation body, and the steel pipe is interior to bond to have the filler.
2. The foundation pit support structure with adjustable pressure of claim 1, wherein the waist rail is a double-split I-shaped steel, the waist rail is located in the middle of the distance from the pile top of the fender pile to the bottom surface of the foundation pit, the longitudinal length of the waist rail is at least larger than the distance between two adjacent fender piles, a support is welded to the lower portion of one side of the waist rail, which is far away from the fender piles, and the end portion of the double-acting cylinder is lapped on the support.
3. The foundation pit support structure with the adjustable pressure as claimed in claim 1, wherein the diameter of the steel pipe is 150 mm-300 mm, the wall thickness of the steel pipe is 2 mm-5 mm, a round hole is reserved on an end plate of the steel pipe close to one end of the anchoring section, and the diameter of the round hole is 2 mm-3 mm larger than that of the grouting pipe.
4. The foundation pit support structure with adjustable pressure of claim 1, wherein the cross section of the anchor pier is triangular, and the central axis of the steel pipe is perpendicular to the hypotenuse of the triangle.
5. The pressure-adjustable foundation pit enclosure structure of claim 1, wherein the consolidation compressive strength is not less than 5MPa, and the filler is a hemispherical concrete structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023296331.4U CN214940184U (en) | 2020-12-31 | 2020-12-31 | Foundation pit support structure with adjustable pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023296331.4U CN214940184U (en) | 2020-12-31 | 2020-12-31 | Foundation pit support structure with adjustable pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214940184U true CN214940184U (en) | 2021-11-30 |
Family
ID=79116385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023296331.4U Active CN214940184U (en) | 2020-12-31 | 2020-12-31 | Foundation pit support structure with adjustable pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214940184U (en) |
-
2020
- 2020-12-31 CN CN202023296331.4U patent/CN214940184U/en active Active
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