CN209323534U - A kind of upper flexible and lower rigid system of deep foundation pit support - Google Patents
A kind of upper flexible and lower rigid system of deep foundation pit support Download PDFInfo
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- CN209323534U CN209323534U CN201822064310.6U CN201822064310U CN209323534U CN 209323534 U CN209323534 U CN 209323534U CN 201822064310 U CN201822064310 U CN 201822064310U CN 209323534 U CN209323534 U CN 209323534U
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- foundation pit
- flexible
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- 238000010276 construction Methods 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 239000002689 soil Substances 0.000 claims description 14
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 8
- 210000000481 breast Anatomy 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 2
- 238000009412 basement excavation Methods 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000012407 engineering method Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000009304 pastoral farming Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
A kind of upper flexible and lower rigid system of deep foundation pit support, including vertical support unit, flexible drawing anchor component, rigid support members and column；Flexibility draws the inclination of anchor component to draw and is located at vertical support unit top；Rigid support members level branch is located at vertical support unit lower part；The rigid support members are at least two rows of；Every row's rigid support members are arranged in a crossed manner in length and breadth in same level；Spacing between row's rigid support members and bottom of foundation ditch is most descended to be not less than 3m, most upper row's rigid support members are arranged in the region being adapted with the artesian aquifer water surface, and most descending row's flexibility to draw spacing between anchor component and most upper row's rigid support members is 2 ~ 4m.The utility model solve high artesian area using flexible branch anchor structure there is technical issues that influence construction, be unfavorable for support system stablize and cause buildings around foundation pit or road to generate and use rigidity branch anchor structure to be not easy to earth excavation, construction speed are slow, waste of material and technical problem at high cost.
Description
Technical field
The utility model relates to building engineering field, especially a kind of upper flexible and lower rigid system of deep foundation pit support.
Background technique
With the quickening of Urbanization in China, the development and utilization of urban underground space are increasingly taken seriously, foundation pit work
Journey constantly develops towards especially big ultra-deep direction.With being continuously increased for foundation depth, the support forms such as single slope, soil nail wall are
It is not able to satisfy the needs of deep pit monitor, ultra-deep foundation pit support form often selects earth-retaining (water) structure+branch anchor structure at present.In depth
In foundation pit construction, in order to which excavation of foundation pit is gone on smoothly, a large amount of pump drainage underground water is needed to reduce mine water position.With people's environmental protection
Base pit dewatering is not advocated in the enhancing of consciousness and the shortage of water resource, more and more cities, but suggests taking measures of preventing water.It is logical
It crosses water-stop curtain and blocks hydraulic connection inside and outside foundation pit, foundation pit inside needs to be arranged drainage well according to construction, and water level becomes on the outside of foundation pit
It is smaller to change influence.
For above-mentioned supporting construction, for high artesian area, when excavation of foundation pit depth is lower than artesian aquifer, according to soft
Property branch anchor structure can punch artesian aquifer, cause the release of water pressure, to cause following consequence: 1, artesian water by drilling seep
Out, it influences to construct；2, it causes active region soil layer shearing strength to decline, is unfavorable for the stabilization of support system；If 3, artesian water hydraulic pressure
Power is very big, is likely to form piping after punching, and buildings around foundation pit or road is caused to generate sedimentation etc..For high artesian
The deep foundation pit support in area mostly all carries out supporting using rigid branch anchor structure.If all using rigid branch anchor structure, the cloth of support
It sets and is not easy to earth excavation, construction speed is slow, is unfavorable for the duration, and waste of material, at high cost.
Utility model content
The purpose of the utility model is to provide a kind of upper flexible and lower rigid system of deep foundation pit support, to solve in high artesian
Area existed using flexible branch anchor structure influence construction, be unfavorable for support system stablize and cause buildings around foundation pit or road
The technical issues of generating sedimentation and to be not easy to earth excavation, construction speed using rigid branch anchor structure slow, waste of material and at
This high technical problem.
To achieve the above object, utility model adopts the following technical scheme that.
A kind of upper flexible and lower rigid system of deep foundation pit support includes vertical for there is the foundation pit of artesian aquifer around supporting
Support unit, flexible drawing anchor component, rigid support members and column；The vertical support unit is arranged along the edge of foundation pit；Its
In, in the lower end insertion bottom of foundation ditch soil body of vertical support unit；At the top of the top to foundation pit side-wall of vertical support unit away from
From no more than 1m；The flexible top for drawing the inclination drawing of anchor component to be located at vertical support unit；The flexibility draws anchor component at least
Two rows are in quincunx or rectangular arrangement；The flexibility draws one end of anchor component to be connected on vertical support unit, and flexibility draws anchor structure
The other end of part is anchored in the flexible soil body for drawing anchor component back；The rigid support members level branch is located at vertical supporting structure
The lower part of part；The rigid support members are at least two rows of, vertically arranged for interval；Wherein, every row's rigid support members are same
Horizontal plane is arranged in a crossed manner in length and breadth；Most descend the spacing between row's rigid support members and bottom of foundation ditch not less than 3m, most upper row's rigidity
Supporting member is arranged in region corresponding with the artesian aquifer water surface, and row's flexibility is most descended to draw anchor component and artesian aquifer water
Spacing between face is not less than 500mm；The column has one group, is arranged at intervals between rigid support members and foundation pit；Wherein,
In the pile foundation of the bottom end insertion bottom of foundation ditch of column, and insertion depth is not less than 3m.
Preferably, the vertical support unit is support pile or is diaphram wall；The flexible drawing anchor component is pre-
Stress anchor pole is grouting tube or is soil nailing；The rigid support members are bracing members or concrete support or inverse
The floor of practice construction.
Preferably, adjacent two rows of flexible spacing drawn between anchor component are 1m~4m；Same row's flexibility is drawn in anchor component, phase
Adjacent two flexible spacing drawn between anchor component are 1m~2m；The flexible tilt angle for drawing anchor component is 5~25 °.
Preferably, when the flexibility drawing anchor component is prestressed anchor, every flexible drawing anchor component is by anchoring section and certainly
It is made of section；Wherein, free segment is steel strand wires or is reinforcing bar, and its length is not less than 5m；Anchoring section is steel strand wires or steel
Muscle and the cement for being wrapped in outside are constituted, and flexibility draws overburden layer thickness above anchor component to be not less than 4m.
Preferably, steel waist rail is equipped on vertical support unit, at corresponding every row's flexibility drawing anchor component setting position；It is described
Flexibility draws the end of anchor component to be fixed on steel waist rail by anchorage.
Preferably, the spacing between adjacent two rows of rigid support members is 3m~8m；When the rigid support members are steel
When support or concrete support, in same row's rigid support members, the spacing between adjacent two rigid support members is 4m
~9m.
Preferably, concrete breast beam is equipped on vertical support unit, at corresponding every row's rigid support members setting position；
The end of the rigid support members is connect with concrete breast beam.
Preferably, the top in vertical support unit, the side wall along foundation pit are provided with crown beam.
The utility model has the characteristics that and beneficial effect compared with prior art.
1, the upper flexible and lower rigid system of deep foundation pit support in the utility model is for there are artesian waters within the scope of excavation of foundation pit
Layer, using flexibility draw anchor component can have an impact construction, be unfavorable for support system stabilization, even cause buildings around foundation pit or
The case where road settlement, artesian aquifer and it is following use rigid support members, meet high artesian area deep foundation pit support demand,
Not only economical rationality, easy for construction, but it is safe and reliable.
2, the utility model is in order to preferably meet high artesian area excavation of foundation pit depth lower than artesian aquifer, under foundation pit
Deep foundation pit support demand of the portion without flexible branch anchor structure execution conditions devises a kind of upper flexible and lower rigid system of deep foundation pit support；
The support system includes vertical support unit, flexible drawing anchor component and rigid support members composition, and foundation pit top is using flexible branch
Anchor structure, is conducive to earth excavation, short time limit, at low cost；Foundation pit lower part avoids flexible branch anchor structure using rigid branch anchor structure
Artesian aquifer is punched, and nearby supporting construction moment of flexure is larger at hole bottom, is conducive to enhance integer support body using rigid branch anchor structure
The stability of system.
3, system of deep foundation pit support upper flexible and lower rigid in the utility model, economical and efficient, easy construction is with the obvious advantage, phase
Than Grazing condition support system, upper flexible and lower rigid support system stability is good, and foundation pit deformation is small, and degree of safety is high；Compared to full rigidity supporting
System, upper flexible and lower rigid support system low cost, earth excavation is convenient, short time limit.
Detailed description of the invention
Utility model is further described in detail with reference to the accompanying drawing.
Structural schematic diagram after the completion of the construction of the step of Fig. 1 is the utility model two.
Structural schematic diagram after the completion of the construction of the step of Fig. 2 is the utility model three.
Structural schematic diagram after the completion of the construction of the step of Fig. 3 is the utility model five.
Structural schematic diagram after the completion of the construction of the step of Fig. 4 is the utility model six.
Structural schematic diagram after the completion of the construction of the step of Fig. 5 is the utility model seven.
Structural schematic diagram after the completion of the construction of the step of Fig. 6 is the utility model nine.
Structural schematic diagram after the completion of the construction of the step of Fig. 7 is the utility model ten.
Appended drawing reference: the vertical support unit of 1-, 2- flexibility draw anchor component, 2.1- anchoring section, 2.2- free segment, 3-
Rigid support members, 4- column, 5- foundation pit, 6- pile foundation, 7- steel waist rail, 8- concrete breast beam, 9- crown beam, 10- pressure-bearing
Water layer.
Specific embodiment
As shown in figs. 1-7, this upper flexible and lower rigid system of deep foundation pit support, for there is the base of artesian aquifer 10 around supporting
Hole 5 includes vertical support unit 1, flexible drawing anchor component 2, rigid support members 3 and column 4；The vertical support unit 1
It is arranged along the edge of foundation pit 5；Wherein, in lower end insertion 5 bottom soil body of foundation pit of vertical support unit 1；Vertical support unit 1
The distance of top to 5 top side wall of foundation pit is no more than 1m, otherwise should take supporting or earth-retaining measure；The flexible drawing anchor component 2
The top for being located at vertical support unit 1 is drawn in inclination；The flexibility draws anchor component 2 at least two rows of, is in quincunx or rectangular arrangement；
The flexibility draws one end of anchor component 2 to be connected on vertical support unit 1, and flexibility draws the other end of anchor component 2 to be anchored at flexible drawing
In the soil body at 2 back of anchor component；The horizontal branch of the rigid support members 3 is located at the lower part of vertical support unit 1；The rigid support
Component 3 is at least two rows of, vertically arranged for interval；Wherein, every row's rigid support members 3 are intersected in length and breadth in same level sets
It sets；Most descend the spacing between 5 bottom of row's rigid support members 3 and foundation pit not less than 3m, the most upper setting of row's rigid support members 3 exists
In region corresponding with 10 water surface of artesian aquifer, above and below 10 water surface of artesian aquifer in the range of 1~2m, and most descend row soft
Property draw the spacing between anchor component 2 and 10 water surface of artesian aquifer to be not less than 500mm, most descend row's flexibility to draw anchor component 2 and most upper row
Spacing between rigid support members 3 is 2 ~ 4m；The column 4 has one group, is arranged at intervals on rigid support members 3 and foundation pit 5
Between；Wherein, in the pile foundation 6 of bottom end insertion 5 bottom of foundation pit of column 4, and insertion depth is not less than 3m.
In the present embodiment, the side wall of foundation pit 5 is straight wall.
Certainly in other embodiments, it will do it slope on the top of foundation pit 5, the side wall of foundation pit 5 is straight wall and slope section
It constitutes, the distance at the top of the top of vertical support unit 1 to 5 straight wall of foundation pit is no more than 1m at this time.
In the present embodiment, the vertical support unit 1 is support pile or is diaphram wall；Wherein, support pile is mixed
Solidifying soil bored concrete pile or Section-steel Piles or steel sheet pile or the stake of SMW engineering method or high-pressure rotary jet grouting pile；It is described flexible to draw the anchor component 2 to be
Prestressed anchor is grouting tube or is soil nailing；The rigid support members 3 be bracing members or concrete support or
The floor of person's reverse construction.
In the present embodiment, length in the lower end of vertical support unit 1 insertion 5 bottom soil body of foundation pit is wanted except meeting stability
It asks outer, is not preferably less than 0.2h still, h is the depth of foundation pit 5.
In the present embodiment, adjacent two rows of flexible spacing drawn between anchor component 2 are 1m~4m；Same row's flexibility draws anchor component
In 2, the adjacent two flexible spacing drawn between anchor component 2 are 1m~2m；The flexible tilt angle for drawing anchor component 2 is 5~
25°。
In the present embodiment, when the flexible drawing anchor component 2 is prestressed anchor, every flexible drawing anchor component 2 is by anchoring
Section 2.1 and free segment 2.2 are constituted；Wherein, free segment 2.2 is steel strand wires or is reinforcing bar, and its length is not less than 5m；Anchoring section
2.1 are constituted for steel strand wires or reinforcing bar with the cement for being wrapped in outside, and flexibility draws 2 top overburden layer thickness of anchor component to be not less than
4m。
In the present embodiment, steel waist is equipped on vertical support unit 1, at corresponding every row's flexibility drawing setting of anchor component 2 position
Beam 7；The flexible end for drawing anchor component 2 is fixed on steel waist rail 7 by anchorage.
In the present embodiment, the spacing between adjacent two rows rigid support members 3 is 3m~8m；When the rigid support members
3 when being bracing members or concrete support, in same row's rigid support members 3, between adjacent two rigid support members 3 between
Away from for 4m~9m.
In the present embodiment, coagulation is equipped on vertical support unit 1, at corresponding every setting of row's rigid support members 3 position
Native waist rail 8；The end of the rigid support members 3 is connect with concrete breast beam 8.
In the present embodiment, the column 4 is generally located on one group of bottom for vertically corresponding to the rigid support members 3 of arrangement
Or be arranged at the joint of transverse and longitudinal rigid support members 3, the top of column 4 is no more than most upper row's rigid support members 3
Top, and spacing is not preferably greater than 15m between column 4.
In the present embodiment, the top in vertical support unit 1, the side wall along foundation pit 5 are provided with crown beam 9.
The construction method of this upper flexible and lower rigid system of deep foundation pit support, including steps are as follows.
Step 1 determines the flexible supporting range for drawing anchor component 2 and rigid support members 3 according to boundary principle.
Step 2, at the edge of foundation pit 5 by the vertical support unit 1 of position construction for presetting vertical support unit 1, and according to
The type of specific vertical support unit 1 selects specific construction machinery and construction technology.
Step 3, the pile foundation 6 and column 4 of 4 bottom of column of constructing, construction machinery and construction technology are according to field geology conditions
Selection.
Step 4, from the ground downwards earthwork to first of flexible operation side for drawing anchor component 2 of excavation pit 5,
By design position and spacing construction drill.
Step 5, first of flexible drawing anchor component 2 of constructing, to the soil of lower excavation pit 5 after intensity reaches design requirement
Side.
Step 6 repeats the process of step 4 and five, successively constructs to last drawing anchor component 2 flexible together.
Step 7 continues at the earthwork to the operation side of first of rigid support members 3 of downward excavation pit 5, and
Clear up the surface of vertical support unit 1.
Step 8, first of rigid support members 3 of constructing and concrete breast beam 8, continue after intensity reaches design requirement
The earthwork of downward foundation pit 5.
Step 9 repeats the process of step 7 and eight, successively constructs to last one of rigid support members 3.
Step 10 is excavated to the bottom of foundation pit 5, construction basis and main structure, successively removes rigid support from bottom to top
Component 3(reverse construction is not required to remove) and flexible drawing anchor component 2(such as needs).
In the present embodiment, flexibility described in step 1 draws the boundary principle of anchor component 2 and rigid support members 3 are as follows: for
High artesian area, flexibility draws anchor component 2 to be arranged in 10 area above of artesian aquifer, and the spacing between artesian aquifer 10
At least 500mm, artesian aquifer 10 and following region use rigid support members 3.
Above-described embodiment is not the exhaustion of specific embodiment, can also there is other embodiments, and above-described embodiment purpose exists
In illustrating utility model, rather than the protection scope of utility model is limited, all applications by utility model simple change froing are equal
It falls in the protection scope of utility model.
Claims (8)
1. a kind of upper flexible and lower rigid system of deep foundation pit support includes for there is the foundation pit of artesian aquifer (10) (5) around supporting
Vertical support unit (1), flexible drawing anchor component (2), rigid support members (3) and column (4)；It is characterized by: described vertical
Support unit (1) is arranged along the edge of foundation pit (5)；Wherein, foundation pit (5) bottom soil body is inserted into the lower end of vertical support unit (1)
In；The distance of top to foundation pit (5) top side wall of vertical support unit (1) is no more than 1m；Flexible drawing anchor component (2) is inclined
Oblique pull is located at the top of vertical support unit (1)；The flexibility draws anchor component (2) at least two rows of, is in quincunx or rectangular cloth
It sets；The flexibility draws the one end of anchor component (2) to be connected on vertical support unit (1), and flexibility draws the other end anchoring of anchor component (2)
In the flexible soil body for drawing anchor component (2) back；The horizontal branch of the rigid support members (3) is located at vertical support unit (1)
Lower part；The rigid support members (3) are at least two rows of, vertically arranged for interval；Wherein, every row's rigid support members (3) are same
One horizontal plane is arranged in a crossed manner in length and breadth；Most descend the spacing between row's rigid support members (3) and foundation pit (5) bottom not less than 3m, most
Upper row's rigid support members (3) are arranged in region corresponding with artesian aquifer (10) water surface, and row's flexibility is most descended to draw anchor
Spacing between component (2) and artesian aquifer (10) water surface is not less than 500mm；The column (4) has one group, is arranged at intervals on just
Between property supporting member (3) and foundation pit (5)；Wherein, in the pile foundation (6) of bottom end insertion foundation pit (5) bottom of column (4), and
Insertion depth is not less than 3m.
2. upper flexible and lower rigid system of deep foundation pit support according to claim 1, it is characterised in that: the vertical support unit
(1) it is support pile or is diaphram wall；It is described it is flexible draw anchor component (2) be prestressed anchor or be grouting tube or
For soil nailing；The rigid support members (3) are the floor of bracing members or concrete support or reverse construction.
3. upper flexible and lower rigid system of deep foundation pit support according to claim 2, it is characterised in that: adjacent two rows of flexible drawing anchors
Spacing between component (2) is 1m~4m；Same row's flexibility is drawn in anchor component (2), between adjacent two flexible drawings anchor component (2)
Spacing be 1m~2m；The flexible tilt angle for drawing anchor component (2) is 5~25 °.
4. upper flexible and lower rigid system of deep foundation pit support according to claim 3, it is characterised in that: the flexible drawing anchor component
(2) when being prestressed anchor, every flexible to draw anchor component (2) to be made of anchoring section (2.1) and free segment (2.2)；Wherein, certainly
It is steel strand wires by section (2.2) or is reinforcing bar, and its length is not less than 5m；Anchoring section (2.1) is steel strand wires or reinforcing bar and packet
The cement for being rolled in outside is constituted, and flexibility draws overburden layer thickness above anchor component (2) to be not less than 4m.
5. upper flexible and lower rigid system of deep foundation pit support according to claim 3, it is characterised in that: in vertical support unit
(1) steel waist rail (7) are equipped on, at corresponding every row's flexibility drawing anchor component (2) setting position；The flexible end for drawing anchor component (2)
Portion is fixed on steel waist rail (7) by anchorage.
6. upper flexible and lower rigid system of deep foundation pit support according to claim 2, it is characterised in that: adjacent two rows rigid support
Spacing between component (3) is 3m~8m；It is same when the rigid support members (3) are bracing members or concrete support
It arranges in rigid support members (3), the spacing between adjacent two rigid support members (3) is 4m~9m.
7. upper flexible and lower rigid system of deep foundation pit support according to claim 6, it is characterised in that: in vertical support unit
(1) concrete breast beam (8) are equipped on, at corresponding every row's rigid support members (3) setting position；The rigid support members (3)
End connect with concrete breast beam (8).
8. upper flexible and lower rigid system of deep foundation pit support according to claim 1, it is characterised in that: in vertical support unit
(1) top is provided with crown beam (9) along the side wall of foundation pit (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822064310.6U CN209323534U (en) | 2018-12-10 | 2018-12-10 | A kind of upper flexible and lower rigid system of deep foundation pit support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822064310.6U CN209323534U (en) | 2018-12-10 | 2018-12-10 | A kind of upper flexible and lower rigid system of deep foundation pit support |
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| Publication Number | Publication Date |
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| CN209323534U true CN209323534U (en) | 2019-08-30 |
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ID=67726046
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| CN201822064310.6U Expired - Fee Related CN209323534U (en) | 2018-12-10 | 2018-12-10 | A kind of upper flexible and lower rigid system of deep foundation pit support |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403349A (en) * | 2018-12-10 | 2019-03-01 | 中建局集团建设发展有限公司 | A kind of upper flexible and lower rigid system of deep foundation pit support and its construction method |
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2018
- 2018-12-10 CN CN201822064310.6U patent/CN209323534U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403349A (en) * | 2018-12-10 | 2019-03-01 | 中建局集团建设发展有限公司 | A kind of upper flexible and lower rigid system of deep foundation pit support and its construction method |
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