CN217870508U - A supporting construction for exposing foundation ditch for a long time - Google Patents
A supporting construction for exposing foundation ditch for a long time Download PDFInfo
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- CN217870508U CN217870508U CN202221654630.7U CN202221654630U CN217870508U CN 217870508 U CN217870508 U CN 217870508U CN 202221654630 U CN202221654630 U CN 202221654630U CN 217870508 U CN217870508 U CN 217870508U
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- retaining wall
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- 238000010276 construction Methods 0.000 title abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 125
- 239000010959 steel Substances 0.000 claims abstract description 125
- 238000004873 anchoring Methods 0.000 claims abstract description 20
- 239000002689 soil Substances 0.000 claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims description 18
- 239000004567 concrete Substances 0.000 claims description 17
- 239000011150 reinforced concrete Substances 0.000 claims description 15
- 239000002344 surface layer Substances 0.000 claims description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 239000011083 cement mortar Substances 0.000 claims description 8
- 230000007774 longterm Effects 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 239000004540 pour-on Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 238000009412 basement excavation Methods 0.000 description 9
- 238000001556 precipitation Methods 0.000 description 7
- 238000005553 drilling Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000002002 slurry Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Abstract
The utility model discloses a supporting construction for exposing foundation ditch for a long time, support including fender pile, anchor system, barricade and barricade. The supporting piles comprise inner rows of steel pipe piles, outer rows of steel pipe piles and connecting beams; the inner row of steel pipe piles are arranged close to the side wall surface of the foundation pit in a driving mode, and inner crown beams are connected between pile tops of the inner row of steel pipe piles; the outer row of steel pipe piles are arranged on the outer side of the inner row of steel pipe piles in a driving mode, the distance between the outer row of steel pipe piles is the same as that between the inner row of steel pipe piles, and the outer row of steel pipe piles and the inner row of steel pipe piles are arranged in a straight line; an outer crown beam is connected between pile tops of the outer row of steel pipe piles; the connecting beam is connected between the outer side surface of the inner crown beam and the inner side surface of the outer crown beam; and the anchoring system, the retaining wall and the retaining wall support are sequentially arranged on the side wall surface of the foundation pit. The utility model discloses a supporting construction can effectively resist soil pressure, glide force for a long time to can prevent that the foundation ditch from warping.
Description
Technical Field
The utility model relates to a supporting construction, concretely relates to a supporting construction for exposing foundation ditch for a long time.
Background
With the great push of the capital construction market, a great deal of foundation pit excavation construction operation is created. Common excavation of foundation pits is divided into two categories, one is slope excavation, and the other is supporting excavation. The requirement of the slope excavation on the field range is higher, and the supporting excavation can only be adopted for the foundation pit which can not carry out the slope excavation operation.
The common supporting structures for supporting and excavating are more, such as steel sheet pile supporting, single-row steel pipe pile supporting and the like. Although the steel sheet pile support has good water stop effect and can be recycled, the steel sheet pile support has high construction cost, large pile driver equipment and larger vibration and noise; although the single-row steel pipe pile support is low in construction cost, the bearing capacity of the single-row steel pipe pile support is limited, and the single-row steel pipe pile support cannot be used for foundation pit support with long-term exposure and deep depth. Each of these support structures has its applicability and unsuitability, and therefore requires "symptomatic medication". For the foundation pit which needs to be exposed for a long time, the supporting requirement is very high, and a foundation pit supporting structure with strong stability is provided, so that the soil pressure and the sliding force can be effectively resisted for a long time, the foundation pit can be prevented from deforming, the potential safety hazard is eliminated, and the intrinsic safety is effectively implemented, therefore, the development of the foundation pit supporting structure for the long-time exposure and the construction method thereof are urgently needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect and provide a supporting construction for exposing the foundation ditch for a long time, it can effectively resist soil pressure, glide force for a long time to prevent that the foundation ditch from warping.
The purpose of the utility model is realized like this: a supporting structure for exposing a foundation pit for a long time comprises supporting piles, an anchoring system, a retaining wall and a retaining wall support;
the supporting piles comprise inner rows of steel pipe piles, outer rows of steel pipe piles and connecting beams; wherein,
the side wall surface of the inner row of steel pipe piles close to the foundation pit is arranged in a driving mode, and an inner crown beam is connected between pile tops of the inner row of steel pipe piles;
the outer row of steel pipe piles is arranged on the outer side of the inner row of steel pipe piles in a driving mode, the distance between the outer row of steel pipe piles is the same as that between the inner row of steel pipe piles, and the outer row of steel pipe piles and the inner row of steel pipe piles are arranged in a straight line shape; an outer crown beam is connected between pile tops of the outer steel pipe piles;
the connecting beam is connected between the outer side surface of the inner crown beam and the inner side surface of the outer crown beam;
and the anchoring system, the retaining wall and the retaining wall support are sequentially arranged on the side wall surface of the foundation pit.
The supporting structure for exposing the foundation pit for a long time is characterized in that the anchoring system comprises a plurality of anchor rod supporting mechanisms, a plurality of connecting channel steels and a plurality of sets of fastening mechanisms; each anchor rod supporting mechanism comprises an anchor rod, cement mortar, a steel bar mesh and a concrete surface layer; the anchor rods of the anchor rod supporting mechanisms are arranged in rows in a quincunx arrangement mode and are inserted into a plurality of anchor rod holes which are arranged in the soil body in the middle among the piles of the steel pipe piles in the inner row in a horizontal direction in advance in a one-to-one correspondence mode; the cement mortar is poured on the periphery of the anchor rod in the anchor rod hole; the reinforcing mesh is sleeved at the rear part of the anchor rod and is attached to and covered on the side wall surface of the foundation pit; the concrete surface layer covers the reinforcing mesh sheet; the connecting channel steels are hung on the tail parts of the rows of anchor rods, which are exposed out of the concrete surface layer, in a one-to-one correspondence mode in which the outer surfaces of the waist plates lean against the concrete surface layer; a plurality of sets of fastening mechanisms are correspondingly arranged at the tails of the anchor rods one by one;
the retaining wall is of a reinforced concrete structure, the section of the retaining wall is L-shaped, the vertical part of the retaining wall is poured on the side wall surface of the foundation pit and covers the anchoring system, and the horizontal part of the retaining wall is poured on the bottom surface of the foundation pit;
the barricade is supported and is the isosceles right triangle for reinforced concrete structure and section, and this barricade is supported and is pour on the top surface of the horizontal part of barricade.
In the supporting structure for exposing the foundation pit for a long time, the lengths of the inner row of steel pipe piles and the outer row of steel pipe piles are both 3-15 m; the outer diameters of all the steel pipe piles are 50-100 cm; the distance between adjacent steel pipe piles in the inner row of steel pipes and the distance between adjacent steel pipe piles in the outer row of steel pipe piles are both 60-150 cm, and the distance between the inner row of steel pipe piles and the outer row of steel pipe piles is 150-250 cm.
The supporting structure for exposing the foundation pit for a long time is characterized in that the inner crown beam, the outer crown beam and the connecting beam are all of reinforced concrete structures with the thickness of 30-80 cm.
The supporting structure for exposing the foundation pit for a long time is characterized in that the row distance of a plurality of rows of anchor rods in the anchoring system is 150-350 cm; the transverse distance between every two adjacent anchor rods in each row of anchor rods is the distance between every two steel pipe piles in the inner row; each set of the fastening mechanism consists of a steel base plate and a high-strength nut which are sequentially arranged at the tail part of the anchor rod.
The supporting structure for exposing the foundation pit for a long time is characterized in that the height from the top end supported by the retaining wall to the vertical part of the retaining wall is 1/5-1/3.
The utility model discloses a supporting construction for exposing foundation ditch for a long time has following characteristics:
1) The utility model is provided with double rows of steel pipe piles, and the outer row of steel pipe piles also has the function of a precipitation well, thereby saving the investment of other precipitation measures; the tops of the inner and outer rows of steel pipe piles form a whole through the inner and outer crown beams and the connecting beams, so that the stability and the safety of foundation pit supporting are improved;
2) The anchoring system is arranged on the side wall surface of the foundation pit, so that the middle lower part of the inner and outer rows of steel pipe piles form a whole, and the stability and the safety of foundation pit support are further improved;
3) The utility model arranges the retaining wall with L-shaped section and the retaining wall support with isosceles right triangle section on the side wall surface of the foundation pit, further ensuring the long-term stability of the side wall of the foundation pit; the soil pressure and the sliding force can be effectively resisted for a long time, and the deformation of the foundation pit is prevented;
4) The construction method of the supporting structure of the utility model is simple and effective; additionally, the utility model discloses need not to set up the interior support of foundation ditch, provide sufficient operation space for other structure operations in the foundation ditch.
Drawings
Fig. 1 is a sectional view of the supporting structure for exposing a foundation pit for a long time according to the present invention;
fig. 2 is a plan view of a support pile in the support structure of the present invention;
figure 3 is a side view of the anchoring system in the support structure of the present invention;
fig. 4 is an axial sectional view of the anchor support of the support structure of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1 to 4, the supporting structure for exposing a foundation pit for a long time of the present invention includes a supporting pile, an anchoring system, a retaining wall 7 and a retaining wall support 8.
The supporting pile comprises an inner row of steel pipe piles 1, an outer row of steel pipe piles 2 and a connecting beam 5; wherein,
the lengths of the inner row of steel pipe piles and the outer row of steel pipe piles are both 3-15 m; the outer diameters of all the steel pipe piles are 50-100 cm;
the side wall surface of the inner row of steel pipe piles 1 close to the foundation pit 100 is arranged in a driving mode, and an inner crown beam 3 is connected between pile tops of the inner row of steel pipe piles 1;
the outer row of steel pipe piles 2 are arranged on the outer side of the inner row of steel pipe piles 1 in a driving mode, the distance between the outer row of steel pipe piles 2 and the distance between the inner row of steel pipe piles 1 are 60-150 cm, the outer row of steel pipe piles 2 and the inner row of steel pipe piles 1 are arranged in a straight line, and the distance between the outer row of steel pipe piles 2 and the inner row of steel pipe piles 1 is 150-250 cm; an outer crown beam 4 is connected between pile tops of the outer steel pipe piles 2;
the coupling beam 3 is connected between the outer side surface of the inner crown beam 3 and the inner side surface of the outer crown beam 4.
The inner crown beam 3, the outer crown beam 4 and the connecting beam 5 are all of reinforced concrete structures with the thickness of 30-80 cm.
The anchoring system, the retaining wall 7 and the retaining wall support 8 are sequentially provided on the side wall surface of the foundation pit 100.
The anchoring system comprises a plurality of anchor rod supporting mechanisms 6, a plurality of connecting channel steels 60 and a plurality of sets of fastening mechanisms; each anchor rod supporting mechanism 6 comprises an anchor rod 61, cement mortar 62, a steel bar mesh 63 and a concrete surface layer 64; wherein,
the anchor rods 61 of the anchor rod supporting mechanisms 6 are arranged in rows in a quincunx arrangement mode and are inserted into a plurality of anchor rod holes which are arranged in the soil body in the middle among the piles of the steel pipe piles 1 in the inner row horizontally in advance in a one-to-one correspondence mode; the row distance of the anchor rods is 150-350 cm; the transverse distance between adjacent anchor rods in each row of anchor rods 61 is the distance between two steel pipe piles 1 in the inner row, namely 120-300 cm;
the reinforcing mesh 63 is either circular with a diameter larger than that of the anchor rod hole and a central opening or square with a side length larger than that of the anchor rod hole and a central opening, and the reinforcing mesh 63 is sleeved on the rear part of the anchor rod 60 and is attached to the side wall surface of the foundation pit 100;
the concrete surface layer 64 covers the steel bar net piece 63;
the anchor rod hole is sealed by a steel bar net piece 63 and a concrete surface layer 64;
the connecting channel steels 60 are hung on the tail parts of the rows of anchor rods 61, which are exposed out of the concrete surface layer 64, in a one-to-one correspondence manner that the outer surface of the waist plate leans against the concrete surface layer 64;
a plurality of sets of fastening mechanisms are correspondingly arranged at the tail parts of the anchor rods 61 one by one; each set of fastening mechanism consists of a steel backing plate 65 and a high-strength nut 6 which are sequentially arranged at the tail part of the anchor rod 61; each connecting channel 60 connects a corresponding row of anchor rods 61 together.
The retaining wall 7 is of a reinforced concrete structure and has an L-shaped section, the vertical part of the retaining wall 7 is poured on the side wall surface of the foundation pit 100 and covers the anchoring system, and the horizontal part of the retaining wall 7 is poured on the bottom surface of the foundation pit 100;
the retaining wall support 8 is of a reinforced concrete structure, the section of the retaining wall support 8 is in an isosceles right triangle shape, the retaining wall support 8 is poured on the top surface of the horizontal part of the retaining wall 7, and the height from the top end of the retaining wall support 8 to the vertical part of the retaining wall 7 is 1/5-1/3.
The utility model discloses a supporting construction for exposing foundation ditch for a long time, rigidity is good, and intensity is high, and the safety and stability is good, and it is effectual to strut, can effectively resist soil pressure, glide force for a long time to prevent that the foundation ditch from warping, the excavation supporting of construction operation cycle length in the specially adapted hole.
The utility model discloses a supporting construction for exposing foundation ditch for a long time includes following step when the construction:
firstly, clearing a field, measuring and lofting, finding out and marking the pile position of an inner row of steel pipe piles 1 and the pile position of an outer row of steel pipe piles, determining a plurality of water-reducing points in the pile positions of the outer row of steel pipe piles according to a geological exploration report, underground water content, the size of a foundation pit and the condition of a peripheral structure, and determining the number of submersible pumps 9 according to the number of the water-reducing points;
drilling a plurality of precipitation points by using a drilling machine to form precipitation holes, naturally making slurry in the precipitation holes, and after the precipitation holes are drilled, keeping enough slurry in the precipitation holes to protect the wall by using the slurry;
vertically driving all the externally-arranged steel pipe piles 2 into a soil body at pile positions of the externally-arranged steel pipe piles by adopting a pile driver, and respectively inserting one externally-arranged steel pipe pile 2 into each water descending hole until pile tops of all the externally-arranged steel pipe piles 2 are 20cm higher than the ground, so that the design elevation requirement is met;
suspending a submersible pump 9 in each externally-discharged steel pipe pile 2 positioned in the drainage hole, wherein the submersible pump is used for lowering the underground water to 50cm below the bottom of the foundation pit 100; simultaneously, vertically driving all the steel pipe piles 1 in the inner row into a soil body at the pile positions of the steel pipe piles in the inner row by using a pile driver, wherein the pile tops of all the steel pipe piles 1 in the inner row are 20cm higher than the ground, so that the design elevation requirement is met;
fifthly, pouring reinforced concrete of an inner crown beam 3 between pile tops of the inner row of steel pipe piles 1, and pouring reinforced concrete of an outer crown beam 4 between pile tops of the outer row of steel pipe piles 2 without the submersible pump 9;
sixthly, pouring reinforced concrete of the connecting beam 5 between the outer side face of the inner crown beam 3 and the inner side face of the outer crown beam 4;
seventhly, after the strength of the reinforced concrete of the inner crown beam 3, the strength of the reinforced concrete of the outer crown beam 4 and the strength of the reinforced concrete of the connecting beam 5 reach the standard, excavating the foundation pit 100;
step eight, when the foundation pit 100 is excavated to the designed bottom elevation of 30cm, installing an anchoring system, namely, drilling a plurality of rows of anchor rod holes on the side wall surface of the foundation pit 100 and on the soil body in the middle of the space between the inner row of steel pipe piles 1 horizontally and towards the ground, wherein the plurality of rows of anchor rod holes are arranged in a quincunx manner, and the depth of each anchor rod hole is greater than the distance between the inner row of steel pipe piles 1 and the outer row of steel pipe piles 2; inserting an anchor rod 61 into each anchor rod hole to form a plurality of rows of anchor rods, then injecting cement mortar 62 into each anchor rod hole, simultaneously determining the number of the connecting channel steel 60 according to the row number of the anchor rod holes, and drilling anchor rod mounting holes in the positions, corresponding to the anchor rod holes in each row, on the waist plate of each connecting channel steel 60; after the strength of the cement mortar 62 in each anchor rod hole reaches the standard, sleeving a reinforcing mesh 63 on the rear part of the anchor rod 61 and attaching the reinforcing mesh to the side wall surface of the foundation pit 100, and spraying a concrete surface layer 64 on the reinforcing mesh 62; after the strength of the concrete surface layer 64 reaches the standard, a plurality of channel steels 60 are correspondingly arranged on a plurality of rows of anchor rods 61 one by one, a plurality of steel backing plates 65 are correspondingly sleeved at the tail part of each anchor rod 60 one by one, and finally a high-strength nut 66 is screwed at the tail end of each anchor rod 61, so that each connecting channel steel 60 connects the corresponding rows of anchor rods 61 together to form an anchoring system;
binding steel bars of the retaining wall 7 and the retaining wall supports 8 at the rear side of the anchoring system, and pouring concrete of the retaining wall 7 and the retaining wall supports 8 at the same time to form the retaining wall 7 and the retaining wall supports 8;
step ten, after the concrete strength of the retaining wall 7 and the retaining wall support 8 reaches the standard, an operator enters the bottom of the foundation pit 100 through the ladder stand, excavates the residual earthwork with the thickness of 30cm at the bottom of the foundation pit 100 through manual excavation, and then performs construction of other main body structures in the foundation pit;
step eleven, after all main body structures in the foundation pit are constructed, all the submersible pumps 9 suspended in the outer row of steel pipe piles 2 are taken out, residual outer crown beams between pile tops of the outer row of steel pipe piles 2 provided with the submersible pumps 9 and pile tops of adjacent outer row of steel pipe piles are poured, and then connecting beams between each section of residual outer crown beams and the inner crown beams 3 are poured; finally, a permanent supporting structure is formed, and safety guarantee is provided for the foundation pit exposed for a long time.
The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, therefore, all equivalent technical solutions should also belong to the scope of the present invention, and should be defined by the claims.
Claims (6)
1. A supporting structure for exposing a foundation pit for a long time comprises supporting piles, an anchoring system, a retaining wall and a retaining wall support; it is characterized in that the preparation method is characterized in that,
the supporting piles comprise inner rows of steel pipe piles, outer rows of steel pipe piles and connecting beams; wherein,
the side wall surface of the inner row of steel pipe piles close to the foundation pit is arranged in a driving mode, and an inner crown beam is connected between pile tops of the inner row of steel pipe piles;
the outer row of steel pipe piles are arranged on the outer side of the inner row of steel pipe piles in a driving mode, the distance between the outer row of steel pipe piles is the same as that between the inner row of steel pipe piles, and the outer row of steel pipe piles and the inner row of steel pipe piles are arranged in a straight line; an outer crown beam is connected between pile tops of the outer row of steel pipe piles;
the connecting beam is connected between the outer side surface of the inner crown beam and the inner side surface of the outer crown beam;
and the anchoring system, the retaining wall and the retaining wall support are sequentially arranged on the side wall surface of the foundation pit.
2. The supporting structure for a long-term exposed foundation pit of claim 1, wherein the anchoring system comprises a plurality of bolting mechanisms, a plurality of connecting channel steels and a plurality of sets of fastening mechanisms; each anchor rod supporting mechanism comprises an anchor rod, cement mortar, a steel bar mesh and a concrete surface layer; the anchor rods of the anchor rod supporting mechanisms are arranged in rows in a quincunx arrangement mode and are inserted into a plurality of anchor rod holes which are arranged in the soil body in the middle among the piles of the steel pipe piles in the inner row horizontally in advance one by one; the cement mortar is poured on the periphery of the anchor rod in the anchor rod hole; the reinforcing mesh is sleeved at the rear part of the anchor rod and is attached to and covered on the side wall surface of the foundation pit; the concrete surface layer covers the reinforcing mesh sheet; the connecting channel steels are hung on the tail parts of the rows of anchor rods, which are exposed out of the concrete surface layer, in a one-to-one correspondence mode in which the outer surfaces of the waist plates lean against the concrete surface layer; a plurality of sets of fastening mechanisms are correspondingly arranged at the tail parts of the anchor rods one by one;
the retaining wall is of a reinforced concrete structure, the section of the retaining wall is L-shaped, the vertical part of the retaining wall is poured on the side wall surface of the foundation pit and covers the anchoring system, and the horizontal part of the retaining wall is poured on the bottom surface of the foundation pit;
the barricade is supported and is the isosceles right triangle for reinforced concrete structure and section, and this barricade is supported and is pour on the top surface of the horizontal part of barricade.
3. The supporting structure for the long-term exposed foundation pit according to claim 1, wherein the lengths of the inner row of steel pipe piles and the outer row of steel pipe piles are both 3-15 m; the outer diameters of all the steel pipe piles are 50-100 cm; the distance between every two adjacent steel pipe piles in the inner row of steel pipes and the distance between every two adjacent steel pipe piles in the outer row of steel pipe piles are both 60-150 cm, and the distance between every two adjacent steel pipe piles in the inner row of steel pipes and the distance between every two adjacent steel pipe piles in the outer row of steel pipe piles are 150-250 cm.
4. The supporting structure for a long-term exposed foundation pit according to claim 1, wherein the inner crown beam, the outer crown beam and the coupling beam are all reinforced concrete structures having a thickness of 30-80 cm.
5. The supporting structure for the long-term exposed foundation pit according to claim 2, wherein the row pitch of the rows of anchor rods in the anchoring system is 150-350 cm; the transverse distance between adjacent anchor rods in each row of anchor rods is the distance between two steel pipe piles in the inner row; each set of the fastening mechanism consists of a steel base plate and a high-strength nut which are sequentially arranged at the tail part of the anchor rod.
6. The supporting structure for the long-term exposure foundation pit according to any one of claims 1 or 2, wherein the height from the top end of the retaining wall support to the vertical portion of the retaining wall is 1/5 to 1/3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221654630.7U CN217870508U (en) | 2022-06-29 | 2022-06-29 | A supporting construction for exposing foundation ditch for a long time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221654630.7U CN217870508U (en) | 2022-06-29 | 2022-06-29 | A supporting construction for exposing foundation ditch for a long time |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217870508U true CN217870508U (en) | 2022-11-22 |
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ID=84099930
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221654630.7U Active CN217870508U (en) | 2022-06-29 | 2022-06-29 | A supporting construction for exposing foundation ditch for a long time |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217870508U (en) |
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2022
- 2022-06-29 CN CN202221654630.7U patent/CN217870508U/en active Active
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