CN206385549U - For soft stratum close to underground structure foundation pit supporting system - Google Patents
For soft stratum close to underground structure foundation pit supporting system Download PDFInfo
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- CN206385549U CN206385549U CN201621409932.2U CN201621409932U CN206385549U CN 206385549 U CN206385549 U CN 206385549U CN 201621409932 U CN201621409932 U CN 201621409932U CN 206385549 U CN206385549 U CN 206385549U
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- steel
- pipe pile
- seat
- heel row
- crown beam
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The utility model discloses a kind of soft stratum that is used for close to the foundation pit supporting system of underground structure, including front-seat steel-pipe pile, heel row steel-pipe pile, front-seat dowel crown beam, heel row dowel crown beam and lateral connection reinforcing bar；Described front-seat steel-pipe pile and heel row steel-pipe pile are interspersed along the parallel distribution of foundation ditch crater wall wall, along foundation ditch crater wall vertical direction；Provided with front-seat dowel crown beam at the top of described front-seat steel-pipe pile, heel row dowel crown beam is provided with the top of heel row steel-pipe pile；Pass through lateral connection bar connecting between described front-seat dowel crown beam and heel row dowel crown beam.The utility model need not perform anchor pole, can significantly reduce the occupancy of the underground space, make full use of ground and space limited within property line.The utility model replaces bored concrete pile to carry out supporting using steel-pipe pile, without maintenance, can effectively shorten the duration, the characteristics of solving bored concrete pile hold facility place, pollution environment, can effectively improve work efficiency, quality controllable, risks of foundation excavation is greatly reduced.
Description
Technical field
The utility model belongs to Geotechnical Engineering field, the more particularly to foundation pit supporting system close to underground structure.
Background technology
In recent years, with the quickening of urban construction, City Building is more and more intensive, and land resource is more and more nervous, and
And geological conditions is worse and worse, many proposed buildings are seized every opportunity, often apart from existing building, the close place of city turnpike road
Built.Because many areas are prevented or restricted from using the soil beyond property line, so making full use of the same of soil
When, bring following problems to building foundation pit smooth construction：
1st, the support pattern of inner support is added using campshed, although technical scheme is feasible, but apply that cost is higher, process is numerous and diverse,
Construction period is longer, more serious to earth excavation and main structure body construction infection；
2nd, traditional stake (wall) anchor supporting, due to the limitation of neighbouring underground structure and pipeline, soil body limited width behind slope,
So anchor cable angle is larger, supporting effect is not good, and some side slopes can not construct anchor cable at all, and it is excessive waist rail deformation often occur
Cause the phenomenon of overall structure unstability；The cantilever segment limited length of cantilevered Retaining Structure with Double-row Piles, and supporting safety coefficient
Relatively low, slope deforming is larger.
For project is anxious, engineering these support forms for being pressed for time are because needing curing time can not meet requirement；And with
Work China Democratic National Construction Association, the development of municipal project, deep basal pit, subgrade engineering it is more and more, and surrounding enviroment do not allow deformation big, therefore
It can not be competent at if the support form of conventional service free such as timber, steel sheet pile.
Utility model content
To solve the above mentioned problem that prior art is present, the utility model, which will solve offer, a kind of can overcome free surrounding space
Limitation, not only with preferable supporting effect, easy construction, process it is simple but also can reduce the duration be used for soft stratum closely under
The foundation pit supporting system of structure.
The technical solution of the utility model is：For soft stratum close to underground structure foundation pit supporting system, it is including preceding
Arrange steel-pipe pile, heel row steel-pipe pile, front-seat dowel crown beam, heel row dowel crown beam, lateral connection reinforcing bar, concrete topping, bar-mat reinforcement and soil
Nail；
Described front-seat steel-pipe pile and heel row steel-pipe pile has many, and front-seat steel-pipe pile and heel row steel-pipe pile are along foundation ditch crater wall
Wall is parallel to be distributed, is interspersed along foundation ditch crater wall vertical direction；
Provided with front-seat dowel crown beam at the top of described front-seat steel-pipe pile, heel row dowel crown beam is provided with the top of heel row steel-pipe pile；
Pass through lateral connection bar connecting between described front-seat dowel crown beam and heel row dowel crown beam；
Foundation ditch crater wall between described front-seat steel-pipe pile is set between bar-mat reinforcement, concrete topping, front-seat steel-pipe pile
Soil nailing and spilled water hole are set in foundation ditch crater wall.
Further, described front-seat dowel crown beam and heel row dowel crown beam are channel-section steel, and Open Side Down for channel-section steel.
Further, the W-shaped distribution of lateral connection reinforcing bar between described front-seat dowel crown beam and heel row dowel crown beam.
Further, the stake footpath of described front-seat steel-pipe pile and heel row steel-pipe pile is 0.2~0.5m, front-seat steel-pipe pile and
The array pitch of heel row steel-pipe pile is 2~5 times of stake footpath, is not less than 2.5 times of stake footpath with campshed stake spacing.
Further, described spilled water hole does rubble loaded filter to foundation ditch tilted 4% after spilled water hole.
Compared with prior art, the utility model has the advantages that：
1st, the utility model need not perform anchor pole, can significantly reduce the occupancy of the underground space, make full use of property line
Within limited ground and space, play returns of investment, it is adaptable to the thicker region of miscellaneous fill, be particularly suitable for use in around close to
The pattern foundation pit supporting structure of existing building and important traffic route.
2nd, the utility model replaces bored concrete pile to carry out supporting using steel-pipe pile, without maintenance, can effectively shorten the duration, solves
The characteristics of bored concrete pile hold facility place, pollution environment, no inner support and waist rail, it is convenient to construct, and technique is simple, can effectively improve
Work efficiency, quality controllable, risks of foundation excavation is greatly reduced.
3rd, after foundation ditch backfill, Guan Liang and the recyclable recycling of connection reinforcing bar can effectively reduce construction cost.
Brief description of the drawings
Fig. 1 is the utility model vertical cross section schematic diagram.
Fig. 2 is the utility model Guan Liang connection diagram.
Fig. 3 is inter-pile soil supporting elevation.
Fig. 4 is inter-pile soil supporting plan.
In figure：1st, front-seat steel-pipe pile；2nd, heel row steel-pipe pile；3rd, front-seat dowel crown beam；4th, heel row dowel crown beam；5th, lateral connection steel
Muscle；6th, concrete topping；7th, bar-mat reinforcement；8th, soil nailing；9th, bar planting；10th, spilled water hole.
Embodiment
The characteristics of below in conjunction with the accompanying drawings with specific embodiment to the utility model, further illustrates：
As shown in figures 1-4, for soft stratum close to underground structure foundation pit supporting system, including front-seat steel-pipe pile 1,
Heel row steel-pipe pile 2, front-seat dowel crown beam 3, heel row dowel crown beam 4, lateral connection reinforcing bar 5, concrete topping 6, bar-mat reinforcement 7 and soil nailing 8；
Described front-seat steel-pipe pile 1 and heel row steel-pipe pile 2 has many, and front-seat steel-pipe pile 1 and heel row steel-pipe pile 2 are along foundation ditch
Crater wall wall is parallel to be distributed, is interspersed along foundation ditch crater wall vertical direction；
The described top of front-seat steel-pipe pile 1 is provided with heel row dowel crown beam 4 provided with front-seat dowel crown beam 3, the top of heel row steel-pipe pile 2；
Connected between described front-seat dowel crown beam 3 and heel row dowel crown beam 4 by lateral connection reinforcing bar 5；
Foundation ditch crater wall between described front-seat steel-pipe pile 1 sets bar-mat reinforcement 7, concrete topping 6, front-seat steel-pipe pile 1 it
Between foundation ditch crater wall in soil nailing 8 and spilled water hole 10 are set.
Further, described front-seat dowel crown beam 3 and heel row dowel crown beam 4 are channel-section steel, and Open Side Down for channel-section steel.
Further, the W-shaped distribution of lateral connection reinforcing bar 5 between described front-seat dowel crown beam 3 and heel row dowel crown beam 4.
Further, the stake footpath of described front-seat steel-pipe pile 1 and heel row steel-pipe pile 2 is 0.2~0.5m, front-seat steel-pipe pile
1 and the array pitch of heel row steel-pipe pile 2 be 2~5 times of stake footpath, be not less than 2.5 times of stake footpath with campshed stake spacing.
Further, described spilled water hole 10 does rubble loaded filter to foundation ditch tilted 4% after spilled water hole 10.
Construction method of the present utility model, comprises the following steps：
Prepare before A, construction
Place cleaning, excavates surface and loosens soil layer, positioning, setting-out are measured to stake holes.Front-seat steel-pipe pile 1 and heel row steel
Pile tube 2 is interspersed along the parallel distribution of foundation ditch crater wall wall, along foundation ditch crater wall vertical direction, described 2 positions of heel row steel-pipe pile
It is located at the center between two front-seat 1 positions of steel-pipe pile along the position of foundation ditch crater wall horizontal direction, with campshed stake spacing not
Less than 2.5 times of stake footpath, front and rear row row of piles is away from 2~5 times for stake footpath.
B, perform front-seat steel-pipe pile 1
The stake position set according to step A performs front-seat steel-pipe pile 1, and front-seat steel-pipe pile 1 is constructed using job-hopping, and sequence of construction is
Stake machine, stake machine is set up to move into place, hang stake, pitching pile, hammering sinking, pile extension, hammering to projected depth, into front-seat steel-pipe pile 1
Casting concrete.
C, perform heel row steel-pipe pile 2
After the completion of front-seat steel-pipe pile 1 is performed, the stake position set according to step A performs heel row steel-pipe pile 2, heel row steel-pipe pile 2
Using job-hopping construction, sequence of construction is sets up stake machine, and stake machine moves into place, hang stake, pitching pile, hammering sinkings, pile extension, hammering is to setting
Count depth, the casting concrete into heel row steel-pipe pile 2.
D, the front-seat dowel crown beam 3 of installation and heel row dowel crown beam 4
Treat that all steel-pipe piles perform completion, front-seat dowel crown beam 3 and heel row dowel crown beam 4, the described front-seat He of dowel crown beam 3 are installed
Heel row dowel crown beam 4 is channel-section steel, and Open Side Down for channel-section steel, and lateral connection reinforcing bar 5 is used between front-seat dowel crown beam 3 and heel row dowel crown beam 4
It is welded to connect, the W-shaped distribution of lateral connection reinforcing bar 5 between described front-seat dowel crown beam 3 and heel row dowel crown beam 4.
E, excavation pit
After possessing excavation of foundation pit condition, along front-seat steel-pipe pile 1 excavation pit vertically downwards, foundation ditch stage excavation, every time
Cutting depth is not more than 3m.
F, supporting inter-pile soil
To prevent inter-pile soil from coming off landslide, soil nailing 8 is beaten into inter-pile soil, bar-mat reinforcement 7, gunite concrete surface layer 6 is hung；Foundation ditch
Crater wall surface sets spilled water hole 10, and spilled water hole 10 does rubble loaded filter to after cheating tilted 4%, spilled water hole 10.Between soil nailing 8 is vertical
Away from 1.5m, horizontal spacing is adjusted flexibly according to piles with different spacing, the spacing 1.5m of spilled water hole 10 × 1.5m.
G, end
Repeat step F, G, until completing the construction of foundation pit supporting system.
Case history
The deep-foundation pit engineering poor to geological conditions, generally using pile-anchor supporting system.This example foundation ditch depth 12m, use
The single overall length 15m of steel-pipe pile, stake footpath 0.219m, stake spacing 0.8m, foundation ditch close to residential building, the underground soil body it is main using miscellaneous fill as
It is main, as shown in Figure 1.
Smooth and place cleaning, measurement and positioning unwrapping wire；A heart position is marked, and circle is spread with lime and marks footpath size and a position
Put；Mark piling order and stake machine starts route, and start place mat rubble on position in stake machine.
Preparative work before construction is fully carried out, front-seat steel-pipe pile 1 is first performed, then perform heel row steel-pipe pile 2, front and rear row steel pipe
Stake is using job-hopping construction.The sequence of construction of steel-pipe pile is：Stake machine installation-- stake machine movement-- in place is hung stake-- and inserted
Stake-- hammering is sunk, and pile extension-- hammering to projected depth-- inscribe steel-pipe pile-- concrete perfusion-- sets up hat
Beam.To prevent pile crown from being damaged in hammering, before piling, special pile cover is placed at the top of pile crown, hammering is directly subjected to thereon
The position of stress, places hardwood damping headblock；Using being welded to connect between Guan Liang and transverse steel, welding position is located at Guan Liang
Channel-section steel and the outside at steel-pipe pile circular arc point of contact, make the W-shaped distribution of lateral connection reinforcing bar 5.
Along the front-seat stage excavation foundation ditch of steel-pipe pile 1 to projected depth after possessing excavation of foundation pit condition, each cutting depth
3m, inter-pile soil hangs the bar-mat reinforcements 7 of 6.5@200 × 200 using soil nailing 8, and soil nailing 8 is using HRB400 grades of reinforcing bars, fy=400MPa, surface layer
Spray C20 pea gravel concretens, thickness 50mm.Mesh sheet is made and preferably preferentially uses welding procedure, and the overlap joint of bar-mat reinforcement 7 is no less than
300mm, mesh sheet should be welded using bar planting 9 or other manner is connected firmly with front-seat steel-pipe pile 1；Foundation Pit wall surface, which is set, to sluice
Hole 10, spilled water hole 10, to foundation ditch tilted 4%, does rubble loaded filter, such as Fig. 3-4 institutes using Φ 100PVC pipes after spilled water hole 10
Show.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, example all should be regarded as exemplary, and is nonrestrictive, the utility model
Scope limited by appended claims rather than described above, it is intended that implication in the equivalency of claim will be fallen
Included with all changes in scope in the utility model.Any reference in claim should not be considered as to limitation institute
The claim being related to.
Described above, preferred embodiment only of the present utility model does not go out to limit the utility model, every according to this
The technical spirit of utility model all should be included in this to any trickle amendment made for any of the above embodiments, equivalent substitution and improvement
Within the protection domain of utility model technical scheme.
Claims (5)
1. it is used for soft stratum close to the foundation pit supporting system of underground structure, it is characterised in that：Including front-seat steel-pipe pile (1), after
Arrange steel-pipe pile (2), front-seat dowel crown beam (3), heel row dowel crown beam (4), lateral connection reinforcing bar (5), concrete topping (6), bar-mat reinforcement
And soil nailing (8) (7)；
Described front-seat steel-pipe pile (1) and heel row steel-pipe pile (2) has many, front-seat steel-pipe pile (1) and heel row steel-pipe pile (2) edge
Foundation ditch crater wall wall is parallel to be distributed, is interspersed along foundation ditch crater wall vertical direction；
Provided with front-seat dowel crown beam (3) at the top of described front-seat steel-pipe pile (1), heel row dowel crown beam is provided with the top of heel row steel-pipe pile (2)
(4)；
Connected between described front-seat dowel crown beam (3) and heel row dowel crown beam (4) by lateral connection reinforcing bar (5)；
Foundation ditch crater wall between described front-seat steel-pipe pile (1) sets bar-mat reinforcement (7), concrete topping (6), front-seat steel-pipe pile
(1) soil nailing (8) and spilled water hole (10) are set in the foundation ditch crater wall between.
2. the soft stratum according to claim 1 that is used for is close to the foundation pit supporting system of underground structure, it is characterised in that：Institute
The front-seat dowel crown beam (3) stated and heel row dowel crown beam (4) are channel-section steel, and Open Side Down for channel-section steel.
3. the soft stratum according to claim 1 that is used for is close to the foundation pit supporting system of underground structure, it is characterised in that：Institute
The W-shaped distribution of lateral connection reinforcing bar (5) between the front-seat dowel crown beam (3) stated and heel row dowel crown beam (4).
4. the soft stratum according to claim 1 that is used for is close to the foundation pit supporting system of underground structure, it is characterised in that：Institute
The front-seat steel-pipe pile (1) stated and the stake footpath of heel row steel-pipe pile (2) are 0.2~0.5m, front-seat steel-pipe pile (1) and heel row steel-pipe pile
(2) array pitch is 2~5 times of stake footpath, is not less than 2.5 times of stake footpath with campshed stake spacing.
5. the soft stratum according to claim 1 that is used for is close to the foundation pit supporting system of underground structure, it is characterised in that：Institute
The spilled water hole (10) stated does rubble loaded filter to foundation ditch tilted 4%, spilled water hole after (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621409932.2U CN206385549U (en) | 2016-12-21 | 2016-12-21 | For soft stratum close to underground structure foundation pit supporting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621409932.2U CN206385549U (en) | 2016-12-21 | 2016-12-21 | For soft stratum close to underground structure foundation pit supporting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206385549U true CN206385549U (en) | 2017-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621409932.2U Expired - Fee Related CN206385549U (en) | 2016-12-21 | 2016-12-21 | For soft stratum close to underground structure foundation pit supporting system |
Country Status (1)
| Country | Link |
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| CN (1) | CN206385549U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522242A (en) * | 2016-12-21 | 2017-03-22 | 大连交通大学 | Foundation pit supporting system for subsurface structure close to soft ground stratum and construction method of foundation pit supporting system |
| CN111719562A (en) * | 2020-06-24 | 2020-09-29 | 中铁第五勘察设计院集团有限公司 | Foundation pit supporting structure |
-
2016
- 2016-12-21 CN CN201621409932.2U patent/CN206385549U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522242A (en) * | 2016-12-21 | 2017-03-22 | 大连交通大学 | Foundation pit supporting system for subsurface structure close to soft ground stratum and construction method of foundation pit supporting system |
| CN106522242B (en) * | 2016-12-21 | 2018-12-14 | 大连交通大学 | For soft stratum close to underground structure foundation pit supporting system construction method |
| CN111719562A (en) * | 2020-06-24 | 2020-09-29 | 中铁第五勘察设计院集团有限公司 | Foundation pit supporting structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170808 Termination date: 20201221 |
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| CF01 | Termination of patent right due to non-payment of annual fee |