CN107989048A - Solid matter step type rotary digging pile supporting system and construction method - Google Patents
Solid matter step type rotary digging pile supporting system and construction method Download PDFInfo
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- CN107989048A CN107989048A CN201711488581.8A CN201711488581A CN107989048A CN 107989048 A CN107989048 A CN 107989048A CN 201711488581 A CN201711488581 A CN 201711488581A CN 107989048 A CN107989048 A CN 107989048A
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- rotary digging
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- stake
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- 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
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (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)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a kind of solid matter step type rotary digging pile supporting system, including diaphragm wall and enhancing stake, the diaphragm wall is installed in the hole slot got through by rotary drilling rig, the enhancing stake is in the hole slot that diaphragm wall front side is got through by rotary drilling rig, the plane where some enhancing stakes being arranged in parallel and the plane parallel where diaphragm wall.Due to using different stake sections, the advantages of concreting is closely knit, seam is firm is realized, its construction procedure understands, smart structural design, and application prospect is good, moreover it is possible to reduce rotary digging stake cost, not only ensure that the safety but also saving construction cost of support system.
Description
Technical field
The present invention relates to the realm of building construction, particularly relates to a kind of solid matter step type rotary digging pile supporting system and construction party
Method.
Background technology
In Process of Urban Development, as building basement function is more and more, basement depth is more and more deeper, this just makes
It is more and more deeper into basement foundation ditch depth, for large-scale deep-foundation pit engineering, deep foundation pit support is carried out frequently with diaphram wall.
Currently used deep basal pit continuous wall construction method has the construction of punching bottler placer, i.e., excavates underground soil using perforating press
Pore-forming, into the hole of perforating press formation, concrete perfusion forms Percussion Piles diaphragm wall, and the construction method work efficiency is good, and application is more wide
It is general.But Percussion Piles also have the problem of certain, mainly punching pile driving construction enter rock speed compared with it is slow, rock drilling ability is poor, construction is made an uproar
Sound is big, and Percussion Piles diaphram wall of constructing in the intensive city of building, easily brings larger noise dirty to surrounding resident
Dye, influences the normal life of surrounding resident.
Common construction method of underground continuous wall also has Spiral digging machine construction diaphram wall, and underground is pierced using rotary pile-digging machine
Soil taking hole forming, then casting concrete forms armored concrete diaphram wall, rotary pile-digging machine construction diaphram wall in hole
Construction noise is low, grooving the degree of automation is high, the speed that fetches earth is fast, greatly reduces the environmental pollution to Adjacent Buildings.Using
Prospect is preferable.
Currently used rotary digging stake diaphram wall, there is also it is certain the problem of, since rotary digging stake diaphragm wall needs to be segmented
Pour, technology is also more short of being handled between rotary digging stake diaphragm wall respectively segmentation at present, and diaphragm wall is overlapped between being respectively segmented and poured
When, easily there is the problems such as concreting leakiness, seam is insecure, it is necessary to be improved to construction technology.Designed
In the design, the whole elongated sectional dimension of stake is basically identical, not directed to the distribution of force of whole diaphragm wall for rotary digging stake diaphragm wall
Situation takes corresponding design method and arrangement and method for construction, and it is therefore necessary to take different stakes to cut for the stressing conditions of diaphragm wall
Face, so as to reduce rotary digging stake cost, not only ensure that the safety but also saving construction cost of support system.
The content of the invention
For some problems existing for above rotary digging pile driving construction scheme, the present invention proposes a kind of solid matter step type rotary digging stake branch
Watch box system and its construction method.
What a kind of technical solution of the present invention was realized in：Solid matter step type rotary digging pile supporting system, including diaphragm wall
With enhancing stake, the diaphragm wall is installed in the hole slot got through by rotary drilling rig, and the enhancing stake is arranged on logical on front side of diaphragm wall
Cross in the hole slot that rotary drilling rig is got through, the plane where some enhancing stakes being arranged in parallel is equal with the plane where diaphragm wall
OK.
As the preferred solution of the present invention, the diaphragm wall is segmentation connected structure, and the diaphragm wall includes some head and the tail
The wall unit being sequentially connected, the wall element length are M, wherein M≤5m, and the wall unit includes internal framework of steel reinforcement and steel
The corresponding hole slot of the wall unit is filled up in concreting portion outside tendons skeleton, the concreting portion.
As the preferred solution of the present invention, the framework of steel reinforcement includes reinforcing bar portion, and the reinforcing bar portion is inserted vertically into hole slot,
Wherein a side at left and right sides of the reinforcing bar portion is fixed with outer channel steel, and another side is fixed with interior channel steel；Adjacent two reinforcing bar
The connecting pin of frame is fitted together to the linking for completing adjacent two framework of steel reinforcement by the outer channel steel and interior channel steel of two frameworks of steel reinforcement.
As the preferred solution of the present invention, two top flanges of the interior channel steel are connected with leakage-stopping board, the leakage-stopping board
Free end and the hole wall of neighbouring slot fit closely.
As the preferred solution of the present invention, the reinforcing bar portion includes the steel grid being arranged side by side before and after N groups, adjacent two steel
Connected and fixed by stirrup between reinforced net, wherein N >=2.
As the preferred solution of the present invention, the steel grid overlaps system by some vertical reinforcements and some horizontal reinforcements
.
As the preferred solution of the present invention, the enhancing stake includes internal enhancing stake reinforcing bar and exterior concreting
Portion, the enhancing stake reinforcing bar include enhancing stake vertical bars and enhancing pile ring muscle.
What the another technical solution of the present invention was realized in：Solid matter step type rotary digging pile supporting system construction method,
Comprise the following steps that：A. determine whether to use mud off, it is first determined need the regional geology situation of pore-forming, Spiral digging machine pore-forming
Centering, micro- weathered rock formation are constructed without mud off, for muck soil, clay and sand, since hole wall is unstable, need to make
Mud is carried out into holes protecting wall；B. make and embedded steel pile casting, steel pile casting is rolled more than or equal to 10mm steel plates using thickness, in casing
Footpath is more than rotary digging stake drill bit of drilling machine diameter 200mm, and when casing is embedding deeper, use, casing are welded to connect using more piece steel pile casting
Top is above ground level to be less than 0.3m；C. continuous wall trench；Side-by-side bores in order；D. one groove section rotary digging construction of diaphragm wall, rotation
When digging drilling machine and starting drilling, first light pressure slow-speed, gradually increases speed and turns to press afterwards, by weak soil to hard rock, deceleration slow-speed drill bit 4,
After pore-forming, continuously repeat to pierce drill bit 4 in hole up and down；E. in one clear groove of groove section of diaphragm wall；F. a groove section is placed
Framework of steel reinforcement；G. pour a groove section and form diaphragm wall unit；H. repeat step d, step f, step e, step f, step g,
Construct another groove section；I. according to step d, rotary digging construction enhancing stake；J. the soil body in foundation pit is cut out, forms whole support system.
It is in step f, the framework of steel reinforcement insertion rotary digging of make groove section is good as the preferred solution of the present invention
In one groove section, framework of steel reinforcement center alignment slot section center, places timely measuring flume section bottom sediment thickness after framework of steel reinforcement, sinks
Slag thickness is less than or equal to 50mm.
As the preferred solution of the present invention, in step g, the concrete in a groove section is poured by the way of pumping, only
Bushing blocks concrete not to groove section leakage is not poured, and preventing spillage influences diaphragm wall overall stability.
Implement above-mentioned technical proposal, due to using different stake sections, realize that concreting is closely knit, seam is firm
Advantage, its construction procedure understand, smart structural design, and application prospect is good, moreover it is possible to reduces rotary digging stake cost, both ensure that supporting
The safety and saving construction cost of system.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other attached drawings according to these attached drawings.
Fig. 1 is rotary digging pile driving construction precedence diagram of the present invention；
Fig. 2 is rotary digging pile driving construction schematic diagram of the present invention；
Fig. 3 is rotary digging pile driving construction profile of the present invention；
Fig. 4 is A-A profiles of the present invention；
Fig. 5 is B-B profiles of the present invention；
Fig. 6 is C-C profiles of the present invention；
Fig. 7 is D-D profiles of the present invention；
Fig. 8 is invention unit groove section construction schematic diagram.
In figure, the soil body 1, rotary rig 2, drilling rod 3, drill bit 4, casing 5, diaphragm wall 6, outer channel steel 61, interior channel steel 62, vertically
Reinforcing bar 63, horizontal reinforcement 64, stirrup 65, leakage-stopping board 66, strengthens stake 7, enhancing stake vertical bars 71, enhancing pile ring muscle 72.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained without making creative work
Example is applied, belongs to the scope of protection of the invention.
It is the solid matter step type rotary digging pile supporting system introduction of the present invention such as Fig. 1-Fig. 8, including diaphragm wall 6, enhancing stake 7.
Diaphragm wall 6 is reinforced concrete wall structure, and diaphragm wall 6 is not greater than 5m using segmentation pouring construction, each section length, in order to
Prevent that tight, concrete is overlapped in 6 each section construction of diaphragm wall, and spillage influence one-piece casting compactness does not occur, by diaphragm wall 6
Internal framework of steel reinforcement system is improved, and the consistent framework of steel reinforcement of each sectional making specification of diaphragm wall 6, framework of steel reinforcement is by water jacket
Steel 61, interior channel steel 62, vertical reinforcement 63, horizontal reinforcement 64, stirrup 65, leakage-stopping board 66 form.The framework of steel reinforcement water of each segmentation
Square outer channel steel 61 is set to side, opposite side set in channel steel 62.Interior channel steel 62 is additionally provided with leakage-stopping board in two top flanges
66.The main body of framework of steel reinforcement is made of vertical reinforcement 63, horizontal reinforcement 64, stirrup 65, is bound and is linked together (often between three
The property known way, does not repeat herein), wherein 64 both ends of horizontal reinforcement are respectively welded at outside outer 61 groove of channel steel, and the other end is welded on
The groove inner face of interior channel steel 62.The framework of steel reinforcement being respectively segmented can be continuously plugged in together, and both the framework of steel reinforcement of a segmentation was outer
Channel steel 61 can vertically top-down be inserted in the interior channel steel 62 of adjacent one framework of steel reinforcement being segmented, once 61 sets of outer channel steel
Enter interior channel steel 62, it is possible to achieve the reliable overlap joint of the framework of steel reinforcement of an adjacent segmentation, so that the segmentation of each diaphragm wall 6 be connected
The continuous stress that connects together, this knockdown framework of steel reinforcement bridging method can greatly strengthen the globality of diaphragm wall 6, together
When improve construction efficiency.The main function of the leakage-stopping board 66 is, when pouring the segmentation of each diaphragm wall 6, interior channel steel 62
Symmetrical two pieces of leakage-stopping boards 66 are vertically embedded into the foundation trench soil body, and when pouring a segmentation, leakage-stopping board 66 can prevent from pouring mixed
Concrete is leak into the adjacent segmentation not poured during solidifying soil, and what diaphragm wall 6 was respectively segmented caused by preventing concrete spillage pours not
It is closely knit.
Strengthen the same conventional design layout of 7 design method of stake, enhancing stake is by concrete and enhancing stake vertical bars 71, enhancing pile ring muscle
72 compositions, enhancing stake 7 are constructed again after diaphragm wall 6 pours completion, and it is overall long that 7 entire length of enhancing stake is less than diaphragm wall 6
Degree, enhancing 7 elevation of top of stake are less than 6 elevation of top of diaphragm wall, its absolute altitude is located in the middle part of foundation pit below absolute altitude, which can
To make up the problem of 6 lateral force of diaphragm wall is insufficient, enhancing diaphragm wall 6 is played in the case of 6 finite thickness of diaphragm wall and is laterally held
The effect of ability, the enhancing stake 7 are set according to support system lateral force feature, can effectively be strengthened 6 bottom of diaphragm wall and be resisted
The problem of lateral force is insufficient.
As shown in Fig. 2, be rotary digging pile driving construction schematic diagram, rotary pile-digging machine mainly by rotary drilling rig fuselage 2, drilling rod 3, drill bit 4,
Casing 5 forms, and drill bit 4, which can be removed, replaces other drill bits and equipment, to drilling when 5 main function of casing is drilling machine pore-forming
Protected.Rotary drilling rig fuselage 2 imparts power to drilling rod 3, and drilling rod 3 starts to rotate and driven drill bit 4 to rotate, drill bit 4
For cylinder, 4 end of drill bit, which starts to be rotated down, cuts soil, and drill bit 4 progressively pierces in soil 1 vertically downward with rotation, drill bit 4
Rotation carries more than soil to ground in rotation, and soil is poured out.
Solid matter step type rotary digging pile supporting system construction method comprises the following steps：
A. determine whether to use mud off.Determine to need the regional geology situation of pore-forming first, the centering of Spiral digging machine pore-forming,
Micro- weathered rock formation is constructed without mud off, for muck soil, clay and sand, since hole wall is unstable, need to make mud
Carry out into holes protecting wall.
B. making and embedded steel pile casting 5, roll steel pile casting, casing internal diameter is more than rotary digging using thickness not less than 10mm steel plates
Stake drill bit of drilling machine diameter 200mm, when casing is embedding deeper, is welded to connect use using more piece steel pile casting, is higher by ground at the top of casing
Face is less than 0.3m.
C. 6 grooving scheme of diaphragm wall.As shown in Figure 1, diaphragm wall 6 is jumped using rotary drilling rig scrapes out groove, by 1. → 3. → 2.
→ 5. → 4. → 7. → 6. → 9. → 8. shown order drilling, diaphragm wall 6 are not more than 5m per unit groove segment length.
D. 6 one groove section rotary digging constructions of diaphragm wall.When rotary drilling rig starts drilling, first light pressure slow-speed, rear gradually increase turns
Speed and turn pressure, by weak soil to hard rock, deceleration slow-speed drill bit 4, after pore-forming, continuously repeats to pierce drill bit 4 in hole, makes up and down
Rotary digging drilling hole is overall more to be stablized.
E. in 6 one clear grooves of groove section of diaphragm wall.After 6 one groove section grooving of diaphragm wall, slot bottom is cleared up, it is anti-by pumping
Circulation carries out slot bottom borehole cleaning.
F. 6 one groove section frameworks of steel reinforcement of diaphragm wall are placed.By the framework of steel reinforcement of make groove section (including water jacket
Steel, interior channel steel, vertical reinforcement, horizontal reinforcement, stirrup etc., before have been introduced) in the good groove section of insertion rotary digging, reinforcing bar
Frame center alignment slot section center, falls slowly, and the whole framework of steel reinforcement of dropping process must not have larger swing.After placing framework of steel reinforcement
Timely measuring flume section bottom sediment thickness, sediment thickness are not greater than 50mm.Before framework of steel reinforcement is placed, rotary pile-digging machine drill bit
4 are changed to steel brush, and the adjacent interior channel steel 62 for having poured groove section is cleared up using steel brush, make the outer channel steel in the groove section that needs pour
61 reliably can be inserted in overlap joint with having poured the 62 of groove section.
G. a groove section diaphragm wall is poured, as shown in figure 8, pouring the diaphragm wall of a groove section, is poured by the way of pumping
The concrete in a groove section is built, leakage-stopping board 66 blocks concrete not to groove section leakage is not poured, and preventing spillage influences to connect
6 overall stability of continuous wall.
H. repeat step d, step f, step e, step f, step g, another groove section of constructing.It is another to repeat above step construction
Groove section.Eventually form diaphragm wall 6.
I. according to the method for step d, rotary digging construction enhancing stake 7.
J. the soil body in foundation pit is cut out, forms whole support system.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention god.
Claims (10)
1. a kind of solid matter step type rotary digging pile supporting system, it is characterised in that including diaphragm wall (6) and enhancing stake (7), the company
Continuous wall is installed in the hole slot got through by rotary drilling rig, and the enhancing stake (7), which is arranged on front side of diaphragm wall (6), passes through rotary drilling rig
In the hole slot got through, the plane where some enhancing stakes (7) being arranged in parallel and the plane parallel where diaphragm wall (6).
2. solid matter step type rotary digging pile supporting system according to claim 1, it is characterised in that the diaphragm wall (6) is
Connected structure is segmented, the diaphragm wall (6) includes the wall unit that some head and the tail are sequentially connected, and the wall element length is M, wherein
M≤5m, the wall unit include the concreting portion outside internal framework of steel reinforcement and framework of steel reinforcement, the concreting
The corresponding hole slot of the wall unit is filled up in portion.
3. solid matter step type rotary digging pile supporting system according to claim 2, it is characterised in that the framework of steel reinforcement includes
Reinforcing bar portion, the reinforcing bar portion are inserted vertically into hole slot, and wherein a side at left and right sides of the reinforcing bar portion is fixed with outer channel steel
(61), another side is fixed with interior channel steel (62)；The outer channel steel that the connecting pin of adjacent two framework of steel reinforcement passes through two frameworks of steel reinforcement
(61) and interior channel steel (62) is fitted together to the linking for completing adjacent two framework of steel reinforcement.
4. solid matter step type rotary digging pile supporting system according to claim 3, it is characterised in that the interior channel steel (62)
Two top flanges are connected with leakage-stopping board (66), and the free end of the leakage-stopping board (66) and the hole wall of neighbouring slot fit closely.
5. solid matter step type rotary digging pile supporting system according to claim 3, it is characterised in that the reinforcing bar portion includes N
The steel grid being arranged side by side before and after group, passes through stirrup (65) connection between adjacent two steel grid and fixes, wherein N >=2.
6. solid matter step type rotary digging pile supporting system according to claim 5, it is characterised in that the steel grid passes through
Some vertical reinforcements (63) and some horizontal reinforcements (64) are overlapping obtained.
7. solid matter step type rotary digging pile supporting system according to claim 1, it is characterised in that enhancing stake (7) bag
The enhancing stake reinforcing bar of inside and exterior concreting portion are included, the enhancing stake reinforcing bar includes enhancing stake vertical bars (71) and enhancing
Pile ring muscle (72).
8. a kind of construction method of solid matter step type rotary digging pile supporting system, it is characterised in that for solid matter step type rotary digging stake
Support system is constructed, and is comprised the following steps that：
A. determine whether to use mud off, it is first determined need the regional geology situation of pore-forming, the centering of Spiral digging machine pore-forming, gentle breeze
Change rock stratum to construct without mud off, for muck soil, clay and sand, since hole wall is unstable, mud progress need to be made
Into holes protecting wall；
B. making and embedded steel pile casting (5), roll steel pile casting, casing internal diameter is more than rotary digging using thickness more than or equal to 10mm steel plates
Stake drill bit of drilling machine diameter 200mm, when casing is embedding deeper, is welded to connect use using more piece steel pile casting, is higher by ground at the top of casing
Face is less than 0.3m；
C. diaphragm wall (6) grooving；Side-by-side bores in order；
D. (6) groove section rotary digging constructions of diaphragm wall, when rotary drilling rig starts drilling, first light pressure slow-speed, gradually increases speed afterwards
With a turn pressure, by weak soil to hard rock, deceleration slow-speed drill bit 4, after pore-forming, continuously repeats to pierce drill bit 4 in hole up and down；
E. in (6) clear grooves of groove section of diaphragm wall；
F. the framework of steel reinforcement of a groove section is placed；
G. pour a groove section and form diaphragm wall unit；
H. repeat step d, step f, step e, step f, step g, another groove section of constructing；
I. according to step d, rotary digging construction enhancing stake (7)；
J. the soil body in foundation pit is cut out, forms whole support system.
9. the construction method of solid matter step type rotary digging pile supporting system according to claim 8, it is characterised in that step f
In, the framework of steel reinforcement of make groove section is inserted into a good groove section of rotary digging, in the alignment slot section of framework of steel reinforcement center
The heart, places timely measuring flume section bottom sediment thickness after framework of steel reinforcement, and sediment thickness is less than or equal to 50mm.
10. according to the construction method of solid matter step type rotary digging pile supporting system according to claim 8, it is characterised in that
In step g, the concrete in a groove section is poured by the way of pumping, leakage-stopping board (66) blocks concrete not to not pouring groove
Section leakage, preventing spillage influences diaphragm wall (6) overall stability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711488581.8A CN107989048A (en) | 2017-12-29 | 2017-12-29 | Solid matter step type rotary digging pile supporting system and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711488581.8A CN107989048A (en) | 2017-12-29 | 2017-12-29 | Solid matter step type rotary digging pile supporting system and construction method |
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| Publication Number | Publication Date |
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| CN107989048A true CN107989048A (en) | 2018-05-04 |
Family
ID=62040378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201711488581.8A Pending CN107989048A (en) | 2017-12-29 | 2017-12-29 | Solid matter step type rotary digging pile supporting system and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837240A (en) * | 2022-05-10 | 2022-08-02 | 中交一公局集团有限公司 | Structure and method for improving bearing capacity of single-chamber closed underground continuous wall foundation by using rear drilled piles |
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| JP2000001856A (en) * | 1998-06-17 | 2000-01-07 | Taisei Corp | Execution method of preceding embedment bracket in underground continuous wall |
| CN201635071U (en) * | 2010-02-02 | 2010-11-17 | 中交二公局第五工程有限公司 | Profile steel lock-type steel pipe pile enclosing structure |
| CN104164881A (en) * | 2014-07-28 | 2014-11-26 | 中国建筑第四工程局有限公司 | Piling wall overlapping cantilever foundation pit support construction method and structure |
| CN104314071A (en) * | 2014-10-24 | 2015-01-28 | 广州市第四建筑工程有限公司 | Construction method of underground diaphragm wall by employing rotary drilling rig |
| CN207878472U (en) * | 2017-12-29 | 2018-09-18 | 广州市第四建筑工程有限公司 | Solid matter step type rotary digging pile supporting system |
-
2017
- 2017-12-29 CN CN201711488581.8A patent/CN107989048A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000001856A (en) * | 1998-06-17 | 2000-01-07 | Taisei Corp | Execution method of preceding embedment bracket in underground continuous wall |
| CN201635071U (en) * | 2010-02-02 | 2010-11-17 | 中交二公局第五工程有限公司 | Profile steel lock-type steel pipe pile enclosing structure |
| CN104164881A (en) * | 2014-07-28 | 2014-11-26 | 中国建筑第四工程局有限公司 | Piling wall overlapping cantilever foundation pit support construction method and structure |
| CN104314071A (en) * | 2014-10-24 | 2015-01-28 | 广州市第四建筑工程有限公司 | Construction method of underground diaphragm wall by employing rotary drilling rig |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837240A (en) * | 2022-05-10 | 2022-08-02 | 中交一公局集团有限公司 | Structure and method for improving bearing capacity of single-chamber closed underground continuous wall foundation by using rear drilled piles |
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