CN207348069U - A kind of soil nailing-mini pile combined foundation ditch support system - Google Patents
A kind of soil nailing-mini pile combined foundation ditch support system Download PDFInfo
- Publication number
- CN207348069U CN207348069U CN201721142940.XU CN201721142940U CN207348069U CN 207348069 U CN207348069 U CN 207348069U CN 201721142940 U CN201721142940 U CN 201721142940U CN 207348069 U CN207348069 U CN 207348069U
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- China
- Prior art keywords
- soil
- soil nailing
- surface layer
- mini pile
- jetting cement
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a kind of soil nailing mini pile combined foundation ditch support system, including the first support unit, jetting cement surface layer and the second support unit, first support unit includes several mini piles, second support unit includes several soil nailings, the mini pile and the soil nailing Special composition net structure, the junction of the soil nailing and the jetting cement surface layer is equipped with reinforcement unit, the reinforcement unit includes two symmetrically arranged reinforcing ribs, and the soil nailing is extended in the soil body through the jetting cement surface layer.The utility model provides a kind of foundation pit supporting system being combined using horizontal soil nailing and vertical mini pile, to ensure supporting effect, reaches quick construction, reduces cost, environmentally protective construction requirement.
Description
Technical field
It the utility model is related to a kind of soil nailing-mini pile combined foundation ditch support system.
Background technology
In recent years, as smart city, the continuous of sponge urban construction paces are accelerated, people propose town site
The utility value requirement of higher, thus city space is greatly developed, underground stereo construction.Associated foundation pit largely gushes
Existing, soil-nail wall support is as a kind of traditional support technology, although technology maturation, quick construction, economically feasible, in city
Unprecedented challenge is encountered in base pit engineering construction.
First, surrounding city environment is complicated, and land used is limited, and all there are basement, soil-nail parameter to be generally for most building
0.8-1.2 times of foundation depth, can punch existing building, and design of anchored bulkhead is restricted.Therefore cost can only be used
Other high supporting schemes, such as support pile scheme.
Secondly the location with larger slope space, soil nailing can generally surmount land red-line, underground environment be polluted, after giving
Continuous engineering construction (such as subway) exerts a certain influence, and the use scope of soil nailing has been similarly subjected to limitation.Equally also can only
Using other supporting schemes that cost is high,
Finally, design of anchored bulkhead is as a kind of traditional support technology, compared with the supporting skill such as support pile, diaphram wall
Art, has certain advantage, cheap such as easy construction, quick.
Therefore, it is complicated in surrounding enviroment, in the limited city foundation pit of land used, how on the premise of deep pit monitor is ensured,
By new technology, new method, shorten soil-nail parameter, increase the use scope of soil nail wall, avoid using the high supporting skill of cost
Art, reaches reduction construction cost, saving construction site, realize that environmentally protective construction is that those skilled in the art is urgently to be resolved hurrily and asks
Topic.
Utility model content
For above-mentioned technical deficiency, the purpose of this utility model is to provide a kind of soil nailing-mini pile combined foundation ditch
Support system, to shorten soil-nail parameter, increases soil nailing use scope, achievees the purpose that to reduce construction cost.
In order to solve the above technical problems, the utility model adopts the following technical solution：
The utility model provides a kind of soil nailing-mini pile combined foundation ditch support system, including is vertically arranged in the soil body
First support unit, the jetting cement surface layer on soil body side wall and the second support unit being horizontally set in the soil body, institute
Stating the first support unit includes several equally distributed mini piles, and it is equally distributed that second support unit includes several
Soil nailing, the mini pile and the soil nailing Special composition net structure, have gap, institute between the soil nailing and the mini pile
The junction for stating soil nailing and the jetting cement surface layer is provided with several reinforcement units of horizontal distribution, and the reinforcement unit includes
Two symmetrically arranged reinforcing ribs, the corresponding reinforcement unit are fixed at the soil nailing on same level direction
On, the soil nailing is extended in the soil body through the jetting cement surface layer, the end of the close jetting cement surface layer of the mini pile
Portion is fixed on the jetting cement surface layer.
Preferably, reinforced mesh or glass fibre mesh sheet are provided with the jetting cement surface layer.
Preferably, the bottom of the jetting cement surface layer is provided with gutter, and the bottom of the mini pile extends to the row
The lower section in ditch.
The beneficial effects of the utility model are：The utility model provides one kind using horizontal soil nailing and vertical mini pile
The foundation pit supporting system being combined, to ensure supporting effect, reaches quick construction, reduces cost, environmentally protective construction requirement.
One is the utility model adds soil nailing using the soil body, soil nailing is only used as a kind of stiffener, by the soil body and reinforcement
Frictional force between part, makes soil body drawknot integral, and therefore, it is long or even to beat to avoid traditional soil nailing without too long for soil nailing
The defects of wearing building；
The second is the effect for the support pile having using vertical mini pile, can be classified and keep out foundation pit side-wall soil pressure, greatly
The big intensity for improving the soil body, ensures the stability of foundation pit；
The third is horizontal soil nailing and vertical mini pile composition space net structure, strengthen soil strength, improve the soil body
Self-stable ability.In the soil body, horizontal soil nailing plays skeleton effect of contraction with vertical mini pile；Soil nailing is primarily subjected to pulling force, miniature
Stake mainly plays bending resistance, shearing resistance effect, and using the soil arching effect that the soil body is formed due to uneven deformation between soil nailing and mini pile, can
The soil body reaches stable between keeping soil nailing, and then ensures the stability of foundation pit.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of top view (base for soil nailing-mini pile combined foundation ditch support system that the utility model embodiment provides
Cheat transparent signal)；
Fig. 2 be Fig. 1 in A-A to sectional view (the transparent signal of foundation pit)；
Fig. 3 is the right view (the transparent signal of foundation pit) in Fig. 2.
Description of reference numerals：
The 1- soil bodys；2- soil nailings；3- mini piles；4- jetting cement surface layers；5- gutters；6- reinforcing ribs.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained, shall fall within the protection scope of the present invention.
As shown in Figure 1 to Figure 3, a kind of soil nailing-mini pile combined foundation ditch support system, including be vertically arranged in the soil body 1
The first support unit, the jetting cement surface layer 4 on 1 side wall of the soil body and the second support for being horizontally set in the soil body 1 it is single
Member, jetting cement surface layer 4 are made of concrete, and the first support unit includes several equally distributed mini piles 3, and the second support is single
Member includes several equally distributed soil nailings 2, mini pile 3 and 2 Special composition net structure of soil nailing, between soil nailing 2 and mini pile 3
With gap, the junction of soil nailing 2 and jetting cement surface layer 4 is provided with several reinforcement units of horizontal distribution, reinforcement unit bag
Two symmetrically arranged reinforcing ribs 6 are included, the setting of reinforcing rib 6 is further ensured that soil nailing 2 is connected with the effective of jetting cement surface layer 4,
It ensure that the stability of jetting cement surface layer 4, corresponding reinforcement unit is fixed at the soil nailing 2 on same level direction
On, soil nailing 2 is extended in the soil body 1 through jetting cement surface layer 4, and the end of the close jetting cement surface layer 4 of mini pile 3 is fixed at
On jetting cement surface layer 4；Wherein horizontally disposed soil nailing 2 forms space net structure with vertically arranged mini pile 3, strengthens soil
The intensity of body 1, improves the self-stable ability of the soil body 1, and soil nailing 2 mainly plays reinforced action, and mini pile 3, which mainly rises, keeps out horizontal direction soil
The effect of pressure, jetting cement surface layer 4 play slope protection, since soil nailing 2 and mini pile 3 form space net structure, and profit
The soil arching effect formed with the soil body 1 between soil nailing 2 and mini pile 3 due to uneven deformation, so that the length of soil nailing 2 is shorter
While can ensure the self-stable ability of the soil body 1, therefore substantially reduce soil nailing 2 use when length, increase it and use model
Enclose, avoid using the high support technology of cost, and then reduce the purpose of construction cost.
Reinforced mesh or glass fibre mesh sheet are provided with jetting cement surface layer 4, the setting of jetting cement surface layer 4 is further protected
The self-stable ability of the soil body 1 is demonstrate,proved, it is therefore prevented that the soil body 1 between soil nailing 2 produces slip.
The bottom of jetting cement surface layer 4 is provided with gutter 5, and the bottom of mini pile 3 extends to the lower section in gutter 5, row
The setting in ditch 5 ensure that the unimpeded of draining, avoid weakening of the water to 1 intensity of jetting cement surface layer 4 and the soil body.
In work progress, specific implementation step is as follows：
S1 measurement and positionings：According to measurement control point measuring mini pile axis and stake position.
In this step, measuring precision in stake position should meet code requirement.
S2 mini pile preexisting holes：Mechanical system pore-forming is used before excavation of foundation pit.
In this step, it should be ensured that hole depth, aperture, borehole perpendicularity are satisfied by related specifications and design requirement.
S3 borehole cleanings：Behind stake holes end hole, mechanical system cleaning eye bottom sediment, surface dust are utilized.
In this step, the main purpose of borehole cleaning is to ensure that the effective building-in depth of mini pile, meets design requirement.
The making and installation of S4 mini piles.
In this step, the intensity of mini pile should meet bending resistance and shearing resistance requirement, and making and the installation of mini pile should meet phase
Close code requirement.
S5 slip castings；The cement mixed (sand) slurry is injected between mini pile skeleton and drilling using certain pressure.
In this step, injecting paste material, grouting pressure should all meet related specifications requirement.
S6 excavation of foundation pit：Excavation of foundation pit is carried out by design requirement.
In this step, excavation of foundation pit should can carry out after mini pile intensity reaches some strength.
In this step, excavation of foundation pit should coordinate support construction layering, carry out in due course；Excavation of foundation pit should divide from top to bottom
Section layering carries out.
S7 nail Constructions：According to design requirement, soil nailing pore-forming, soil nailing installation and slip casting are carried out in precalculated position.
In this step, sequence of construction is followed successively by pore-forming → borehole cleaning → installation soil nailing → injection cement (sand) slurry.
In this step, suitable pore-forming equipment and construction technology, the hole of soil nailing should be selected respectively according to live strata condition
Footpath, hole depth should all meet related specifications requirement.
In this step, the purpose of borehole cleaning is collapse hole in order to prevent.
In this step, the length of soil nailing, the connection of intensity and soil nailing, injecting paste material and grouting pressure should all meet phase
Close code requirement.
S8 surface constructions：Surface construction is carried out according to design requirement.
In this step, sequence of construction is followed successively by crater wall leveling → gunite concrete → extension bar-mat reinforcement → injection coagulation
Soil.
In this step, leveling is in order to which surface layer and the soil body preferably bond.
In this step, bar-mat reinforcement should be firmly connected with soil nailing, and connection mode should meet related specifications requirement.
In this step, the match ratio of spray furnace, the thickness of the ratio of mud and surface layer, intensity should all meet related specifications
And design requirement.
S9 repeats S6 to S8 steps, up to excavation of foundation pit to designed elevation.
The foundation pit supporting system being combined in the utility model using horizontal soil nailing and vertical mini pile, to ensure that supporting is imitated
Fruit, reaches quick construction, reduces cost, environmentally protective construction requirement.
Obviously, those skilled in the art can carry out the utility model various modification and variations without departing from this practicality
New spirit and scope.If in this way, these modifications and variations of the utility model belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to comprising including these modification and variations.
Claims (3)
1. a kind of soil nailing-mini pile combined foundation ditch support system, it is characterised in that including first be vertically arranged in the soil body
Support unit, the jetting cement surface layer on soil body side wall and the second support unit being horizontally set in the soil body, described first
Support unit includes several equally distributed mini piles, and second support unit includes several equally distributed soil nailings,
The mini pile and the soil nailing Special composition net structure, have gap, the soil between the soil nailing and the mini pile
The junction of nail and the jetting cement surface layer is provided with several reinforcement units of horizontal distribution, and the reinforcement unit includes two
Symmetrically arranged reinforcing rib, the corresponding reinforcement unit are fixed on the soil nailing on same level direction,
The soil nailing is extended in the soil body through the jetting cement surface layer, and the end of the close jetting cement surface layer of the mini pile is consolidated
Surely it is arranged on the jetting cement surface layer.
A kind of 2. soil nailing-mini pile combined foundation ditch support system as claimed in claim 1, it is characterised in that the jetting cement
Reinforced mesh or glass fibre mesh sheet are provided with surface layer.
A kind of 3. soil nailing-mini pile combined foundation ditch support system as claimed in claim 1, it is characterised in that the jetting cement
The bottom of surface layer is provided with gutter, and the bottom of the mini pile extends to the lower section in the gutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721142940.XU CN207348069U (en) | 2017-09-07 | 2017-09-07 | A kind of soil nailing-mini pile combined foundation ditch support system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721142940.XU CN207348069U (en) | 2017-09-07 | 2017-09-07 | A kind of soil nailing-mini pile combined foundation ditch support system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207348069U true CN207348069U (en) | 2018-05-11 |
Family
ID=62410776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721142940.XU Expired - Fee Related CN207348069U (en) | 2017-09-07 | 2017-09-07 | A kind of soil nailing-mini pile combined foundation ditch support system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207348069U (en) |
-
2017
- 2017-09-07 CN CN201721142940.XU patent/CN207348069U/en not_active Expired - Fee Related
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| 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: 20180511 Termination date: 20180907 |
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| CF01 | Termination of patent right due to non-payment of annual fee |