CN109403349A - A kind of upper flexible and lower rigid system of deep foundation pit support and its construction method - Google Patents
A kind of upper flexible and lower rigid system of deep foundation pit support and its construction method Download PDFInfo
- Publication number
- CN109403349A CN109403349A CN201811503634.3A CN201811503634A CN109403349A CN 109403349 A CN109403349 A CN 109403349A CN 201811503634 A CN201811503634 A CN 201811503634A CN 109403349 A CN109403349 A CN 109403349A
- Authority
- CN
- China
- Prior art keywords
- foundation pit
- flexible
- support members
- anchor component
- rigid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000009412 basement excavation Methods 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 15
- 210000000481 breast Anatomy 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000004080 punching 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
- 238000010008 shearing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
A kind of upper flexible and lower rigid system of deep foundation pit support and its construction method, wherein system of deep foundation pit support includes 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 present invention 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
Invention is related to building engineering field, especially a kind of upper flexible and lower rigid system of deep foundation pit support and its construction method.
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.
Summary of the invention
The object of the present invention is to provide a kind of upper flexible and lower rigid system of deep foundation pit support and its construction method, to solve in height
Artesian area existed using flexible branch anchor structure influence construction, be unfavorable for support system stablize and cause foundation pit neighboring buildings
Object or road generate the technical issues of sedimentation and slow, the material that is not easy to earth excavation, construction speed using rigid branch anchor structure
Waste and technical problem at high cost.
To achieve the above object, invention 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；The flexibility
The end of anchor component is drawn 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.
A kind of construction method of 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 and rigid support members according to boundary principle.
Step 2, at the edge of foundation pit by the vertical support unit of position construction for presetting vertical support unit, and according to tool
The type of the vertical support unit of body selects specific construction machinery and construction technology.
Step 3, the pile foundation and column of column bottom of constructing.
Step 4 is pressed from the ground downwards earthwork to first of flexible operation side for drawing anchor component of excavation pit
Design position and spacing construction drill.
Step 5, first of flexible drawing anchor component of constructing, to the earthwork of lower excavation pit after intensity reaches design requirement.
Step 6 repeats the process of step 4 and five, successively constructs to last drawing anchor component flexible together.
Step 7 continues at the earthwork to the operation side of first of rigid support members of downward excavation pit, and clear
Manage the surface of vertical support unit.
Step 8, construct first of rigid support members and concrete breast beam, continue after intensity reaches design requirement to
The earthwork of lower foundation pit.
Step 9 repeats the process of step 7 and eight, successively constructs to last one of rigid support members.
Step 10 is excavated to the bottom of foundation pit, construction basis and main structure.
Preferably, flexibility described in step 1 draws the boundary principle of anchor component and rigid support members are as follows: for high pressure-bearing
Water area, flexibility draws anchor component to be arranged in artesian aquifer area above, and the spacing between artesian aquifer is at least
500mm, artesian aquifer and following region use rigid support members.
Compared with prior art the invention has the characteristics that and beneficial effect.
1, the upper flexible and lower rigid system of deep foundation pit support in the present invention is directed within the scope of excavation of foundation pit there are artesian aquifer,
Using flexibility draw anchor component can have an impact construction, be unfavorable for support system stabilization, even cause buildings around foundation pit or road
Road settle the case where, artesian aquifer and it is following use rigid support members, meet high artesian area deep foundation pit support demand, both
It is economical rationality, easy for construction and safe and reliable.
2, the present invention is to preferably meet high artesian area excavation of foundation pit depth lower than artesian aquifer, foundation pit lower part without
The deep foundation pit support demand of flexible branch anchor structure execution conditions devises a kind of upper flexible and lower rigid system of deep foundation pit support；The branch
Watch box system includes vertical support unit, flexible drawing anchor component and rigid support members composition, and foundation pit top is using flexible branch anchor knot
Structure, is conducive to earth excavation, short time limit, at low cost；Foundation pit lower part avoids flexible branch anchor structure from punching using rigid branch anchor structure
Artesian aquifer, and nearby supporting construction moment of flexure is larger at hole bottom, is conducive to enhance integer support system using rigid branch anchor structure
Stability.
3, system of deep foundation pit support upper flexible and lower rigid in the present invention, economical and efficient, easy construction is with the obvious advantage, compared to complete
Flexible 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 support system,
Upper flexible and lower rigid support system low cost, earth excavation is convenient, short time limit.
Detailed description of the invention
Invention is further described in detail with reference to the accompanying drawing.
Fig. 1 is the structural schematic diagram after the completion of step two construction of the invention.
Fig. 2 is the structural schematic diagram after the completion of step three construction of the invention.
Fig. 3 is the structural schematic diagram after the completion of step five construction of the invention.
Fig. 4 is the structural schematic diagram after the completion of step six construction of the invention.
Fig. 5 is the structural schematic diagram after the completion of step seven construction of the invention.
Fig. 6 is the structural schematic diagram after the completion of step nine construction of the invention.
Fig. 7 is the structural schematic diagram after the completion of step ten construction of the invention.
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 to invent, rather than limit the protection scope of invention, it is all by invention simple change froing using the guarantor for all falling within invention
It protects in range.
Claims (10)
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).
9. the construction method of upper flexible and lower rigid system of deep foundation pit support described in a kind of any one of claim 1-8, special
Sign is, comprises the following steps that
Step 1 determines the flexible supporting range for drawing anchor component (2) and rigid support members (3) according to boundary principle；
Step 2 is constructed vertical support unit (1), and root at the edge of foundation pit (5) by the position for presetting vertical support unit (1)
Specific construction machinery and construction technology are selected according to the type of specific vertical support unit (1)；
Step 3, the pile foundation (6) and column (4) of column (4) bottom of constructing；
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, construct first of rigid support members (3) and concrete breast beam (8), continues 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.
10. the construction method of upper flexible and lower rigid system of deep foundation pit support according to claim 9, it is characterised in that: step
The boundary principle of the drawing of flexibility described in one anchor component (2) and rigid support members (3) are as follows: for high artesian area, flexibility is drawn
Anchor component (2) is arranged in artesian aquifer (10) area above, and the spacing between artesian aquifer (10) is at least 500mm,
Artesian aquifer (10) and following region use rigid support members (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811503634.3A CN109403349A (en) | 2018-12-10 | 2018-12-10 | A kind of upper flexible and lower rigid system of deep foundation pit support and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811503634.3A CN109403349A (en) | 2018-12-10 | 2018-12-10 | A kind of upper flexible and lower rigid system of deep foundation pit support and its construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109403349A true CN109403349A (en) | 2019-03-01 |
Family
ID=65458062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811503634.3A Pending CN109403349A (en) | 2018-12-10 | 2018-12-10 | A kind of upper flexible and lower rigid system of deep foundation pit support and its construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109403349A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110093933A (en) * | 2019-05-10 | 2019-08-06 | 吴永红 | A kind of foundation pit vertically draws anchor support system and its construction method |
| CN110409462A (en) * | 2019-08-13 | 2019-11-05 | 成都大学 | A kind of pattern foundation pit supporting structure reinforcement means and foundation pit support system |
| CN110552540A (en) * | 2019-08-08 | 2019-12-10 | 上海二十冶建设有限公司 | construction method of inverted retaining wall supporting structure of cyclone tank adjacent to existing building |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001046526A1 (en) * | 1999-12-21 | 2001-06-28 | Tristanagh Pty. Ltd. | Earth retention and piling systems |
| CN103938634A (en) * | 2014-03-22 | 2014-07-23 | 王继远 | Deep foundation pit supporting structure and construction method |
| CN104264682A (en) * | 2014-09-11 | 2015-01-07 | 成都市第六建筑工程公司 | Anchor traction wall protection pile base layer concrete beam support pouring technology |
| CN104895089A (en) * | 2015-04-08 | 2015-09-09 | 山东大学 | Construction method of permanent retaining system characterized by joint work of basement floor slabs and retaining piles |
| CN106013171A (en) * | 2016-06-30 | 2016-10-12 | 大连理工大学 | Semi-rigid and semi-flexible support structure and method for deep foundation pit side wall |
| CN106351232A (en) * | 2016-08-30 | 2017-01-25 | 中国建筑西南勘察设计研究院有限公司 | Internal rigid frame support foundation pit supporting structure and construction method thereof |
| KR20170017199A (en) * | 2015-08-05 | 2017-02-15 | 김원근 | Retaining Wal1 Construction Method Using PHC Pile |
| CN207452911U (en) * | 2017-11-03 | 2018-06-05 | 中铁第一勘察设计院集团有限公司 | A kind of multi-thread crossings on different level abnormal shape deep foundation pit supporting structure |
| CN209323534U (en) * | 2018-12-10 | 2019-08-30 | 中建一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 |
-
2018
- 2018-12-10 CN CN201811503634.3A patent/CN109403349A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001046526A1 (en) * | 1999-12-21 | 2001-06-28 | Tristanagh Pty. Ltd. | Earth retention and piling systems |
| CN103938634A (en) * | 2014-03-22 | 2014-07-23 | 王继远 | Deep foundation pit supporting structure and construction method |
| CN104264682A (en) * | 2014-09-11 | 2015-01-07 | 成都市第六建筑工程公司 | Anchor traction wall protection pile base layer concrete beam support pouring technology |
| CN104895089A (en) * | 2015-04-08 | 2015-09-09 | 山东大学 | Construction method of permanent retaining system characterized by joint work of basement floor slabs and retaining piles |
| KR20170017199A (en) * | 2015-08-05 | 2017-02-15 | 김원근 | Retaining Wal1 Construction Method Using PHC Pile |
| CN106013171A (en) * | 2016-06-30 | 2016-10-12 | 大连理工大学 | Semi-rigid and semi-flexible support structure and method for deep foundation pit side wall |
| CN106351232A (en) * | 2016-08-30 | 2017-01-25 | 中国建筑西南勘察设计研究院有限公司 | Internal rigid frame support foundation pit supporting structure and construction method thereof |
| CN207452911U (en) * | 2017-11-03 | 2018-06-05 | 中铁第一勘察设计院集团有限公司 | A kind of multi-thread crossings on different level abnormal shape deep foundation pit supporting structure |
| CN209323534U (en) * | 2018-12-10 | 2019-08-30 | 中建一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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110093933A (en) * | 2019-05-10 | 2019-08-06 | 吴永红 | A kind of foundation pit vertically draws anchor support system and its construction method |
| CN110552540A (en) * | 2019-08-08 | 2019-12-10 | 上海二十冶建设有限公司 | construction method of inverted retaining wall supporting structure of cyclone tank adjacent to existing building |
| CN110409462A (en) * | 2019-08-13 | 2019-11-05 | 成都大学 | A kind of pattern foundation pit supporting structure reinforcement means and foundation pit support system |
| CN110409462B (en) * | 2019-08-13 | 2020-04-14 | 成都大学 | Foundation pit support reinforcing method and foundation pit support system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106759376B (en) | For closing on the construction method of the Anchored Sheet Pile Wall for Excavation system of existing underground structure | |
| CN105525627B (en) | A kind of two-way anchor fixed board retaining wall and its construction method | |
| CN105064397A (en) | Open excavation construction method for expanding excavation of station on metro interzone shield tunnel foundation | |
| CN109403349A (en) | A kind of upper flexible and lower rigid system of deep foundation pit support and its construction method | |
| CN103114595A (en) | Support method and device of support pile preformed core-soil double-buttress inclined inner-strut foundation ditch | |
| CN110106919A (en) | A kind of lid digs the building enclosure and its construction method at station | |
| CN111236257A (en) | Novel foundation pit supporting structure | |
| CN110206038A (en) | Supporting construction and construction method at a kind of concave foundation pit external corner | |
| CN207260183U (en) | A kind of external hanging type baffle prestress anchorage cable peg board retaining wall | |
| CN110761300B (en) | Construction method for supporting impervious soft soil body on side slope of deep foundation pit of high-rise building through micro-expansion | |
| CN204825923U (en) | Relay formula underground structure | |
| CN103243721B (en) | Highrise Building With Raft Foundation and Core Walls Structure excavation construction method under Unfavorable geology condition | |
| CN209323533U (en) | It is a kind of it is upper just under soft system of deep foundation pit support | |
| CN209323534U (en) | A kind of upper flexible and lower rigid system of deep foundation pit support | |
| CN205382942U (en) | Multilayer underground space curtain posture subsurface excavated construction's supporting construction under existing facility | |
| CN210288408U (en) | Foundation pit supporting structure | |
| CN108035360A (en) | A kind of method for pattern foundation pit supporting structure | |
| CN102296620B (en) | Curtain water-stop slope wall and construction method thereof | |
| CN204715364U (en) | A kind of foundation pit support device | |
| CN208815566U (en) | The transverse direction that open cut or lid dig underground main structure below existing building digs construction | |
| CN1027387C (en) | Method for supporting deep-foundation side wall by use of channel-section steel and anchor bar concrete pile | |
| CN206220121U (en) | Assembled point anchor barricade | |
| CN202543946U (en) | Supporting structure for drainage type fender posts in soft soil area | |
| CN108005086A (en) | A kind of high buttress counter pull type inclined support structure for pattern foundation pit supporting structure | |
| CN109403348A (en) | It is a kind of it is upper just under soft system of deep foundation pit support and its construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190301 |