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 PDF

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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
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China
Prior art keywords
foundation pit
flexible
support members
anchor component
rigid
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CN201811503634.3A
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Chinese (zh)
Inventor
周予启
刘卫未
聂艳侠
马书杰
刘广济
韩鞠
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China Construction First Group Corp Ltd
China Construction First Group Construction and Development Co Ltd
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China Construction First Group Corp Ltd
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Priority to CN201811503634.3A priority Critical patent/CN109403349A/en
Publication of CN109403349A publication Critical patent/CN109403349A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74Means for anchoring structural elements or bulkheads
    • E02D5/76Anchorings for bulkheads or sections thereof in as much as specially adapted therefor

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  • 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

A kind of upper flexible and lower rigid system of deep foundation pit support and its construction method
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).
CN201811503634.3A 2018-12-10 2018-12-10 A kind of upper flexible and lower rigid system of deep foundation pit support and its construction method Pending CN109403349A (en)

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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)

* Cited by examiner, † Cited by third party
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

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