CN108914942A - A kind of system of deep foundation pit support and its construction method - Google Patents
A kind of system of deep foundation pit support and its construction method Download PDFInfo
- Publication number
- CN108914942A CN108914942A CN201810687208.3A CN201810687208A CN108914942A CN 108914942 A CN108914942 A CN 108914942A CN 201810687208 A CN201810687208 A CN 201810687208A CN 108914942 A CN108914942 A CN 108914942A
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- China
- Prior art keywords
- steel pipe
- foundation pit
- pile
- pipe support
- support pile
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- 238000010276 construction Methods 0.000 title claims abstract description 37
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 73
- 239000010959 steel Substances 0.000 claims abstract description 73
- 239000002689 soil Substances 0.000 claims abstract description 33
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 16
- 238000009412 basement excavation Methods 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 4
- 238000012163 sequencing technique Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000005728 strengthening Methods 0.000 abstract description 2
- 230000006378 damage Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000003351 stiffener Substances 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
The invention discloses a kind of system of deep foundation pit support and its construction methods, the system of deep foundation pit support, it is beaten vertically including several into the intracorporal steel pipe support pile (1) of foundation pit side soil, foundation pit side soil body side wall is covered with concrete nail wall (2), and it is inserted into several anchor cables (3) obliquely into the soil body on the concrete nail wall (2), the anchor cable (3) passes through anchorage (4) fixed strain for being placed on the outside of concrete nail wall (2), the top of adjacent steel pipe support pile (1) is fixedly connected by fried dough twist formula reinforcing bar Pan Liang (5) simultaneously；The advantage of the invention is that, the high system of deep foundation pit support of a stability is formed by fried dough twist formula reinforcing bar Pan Liang, it is not only simple in structure, is easy for construction, and difficulty of construction is effectively reduced and shortens the construction period, the safety for also strengthening deep basal pit simultaneously, is particularly suitable for the deep-foundation pit engineering of the more backfill soil property of severe cold area rubble.
Description
Technical field
The invention belongs to Geotechnical Engineering fields, more particularly, to a kind of system of deep foundation pit support and its construction method.
Background technique
In deep-foundation pit engineering, deep foundation pit support is the key that guarantee that excavation process is firm, for belonging to
Large-scale synclinal basin tectonic geology complex area in North China Platform type, Taizihe River recess, by upper Proterozoic erathem and cold around basin
The old stratum composition such as force system, Basin Central is Mesozoic sand, shale and volcanic series.Due to the shadow by multiple diastrophism,
Cause to inverted syncline is tiltedly become, axial direction is bordering on thing distribution.This brings very big to large-scale deep pit construction
Difficulty, and it is big using existing drilling fender post support construction difficulty, and the construction period is long, and input cost is high.
Summary of the invention
Object of the present invention is to：It provides one kind be not only simple in structure, be easy for construction, and difficulty of construction is effectively reduced and shortens
Construction period, while the safety of deep basal pit is also strengthened, it is particularly suitable for the depth of the more backfill soil property of severe cold area rubble
Foundation pit supporting system and its construction method.
The technical scheme is that：A kind of system of deep foundation pit support, including several beat into the foundation pit side soil body vertically
Interior steel pipe support pile, foundation pit side soil body side wall are covered with concrete nail wall, and on the concrete nail wall into the soil body
It is inserted into several anchor cables obliquely, the anchor cable is by the anchorage fixed strain that is placed on the outside of concrete nail wall, while adjacent steel
The top of pipe support pile is fixedly connected by fried dough twist formula reinforcing bar Pan Liang, forms a stability height by fried dough twist formula reinforcing bar Pan Liang
System of deep foundation pit support, be not only simple in structure, be easy for construction, and difficulty of construction is effectively reduced and shortens the construction period, together
When also strengthen the safety of deep basal pit, be particularly suitable for the deep-foundation pit engineering of the more backfill soil property of severe cold area rubble.
The concrete nail wall includes internal layer steel mesh and outer reinforcement net as a preferred technical solution, and is set to
Pea gravel concreten layer between the internal layer steel mesh and the outer reinforcement net；Wherein the internal layer steel mesh and the steel pipe
Support pile is fixedly connected.
The anchorage includes that level is fixed on concrete nail wall side wall and corresponds to up and down as a preferred technical solution,
Two be arranged put more energy into floor, are vertically arranged and are fixed on two anchor plates for putting more energy into floor outboard end, be fixed on oblique on anchor plate
Iron block, and be fixed on the wedge block and be used for the anchoring piece of fixed strain anchor cable outboard end, the wherein outboard end of wedge block
Face is vertically arranged with anchor cable.
The bottom end of the steel pipe support pile is in sharpening shape as a preferred technical solution, and places pile cover on its top, is cut
Pointed steel pipe support pile can be squeezed into more smoothly in the soil body, and the pile cover that steel pipe support pile top is placed can prevent from hammering into shape
Steel pipe support pile is damaged when hitting, and foundation engineering measure needs have been taken into account while meeting the durability requirements of foundation pit.
The horizontal distance between adjacent steel pipe support pile is 0.35m~0.4m as a preferred technical solution,.
The steel pipe support pile injects in hollow setting and in it cement slurry as a preferred technical solution, increases steel
The strength of the mixing pile of pipe support pile.
The construction method of system of deep foundation pit support as described above, includes the following steps：
Step 1：According to measuring stake site is carried out after stake top absolute altitude excavation section by section operation side, then down-hole hammer is transferred extremely
Stake site carries out drawing hole construction；
Step 2：Steel pipe support pile is stacked by piling sequencing, and heap is put the bottom end that rear scene carries out steel pipe support pile well and cut
Point construction, and pile cover is placed on the top of steel pipe support pile；
Step 3：Steel pipe support pile is hung into corresponding stake site and carries out vertical pitching pile, while keeping hammer, pile cover and steel pipe branch
Fender pile is on the same longitudinal axis；
Step 4：Inject cement slurry into the steel pipe support pile being partially disposed in non cohesire soil, and by adjacent steel pipe supporting
The top of stake is fixedly connected by fried dough twist formula reinforcing bar Pan Liang；
Step 5：The excavation pit on the inside of steel pipe support pile, and wall is followed closely in foundation pit side soil body side wall oversite concrete,
It is inserted into anchor cable on concrete nail wall obliquely into the soil body and passes through anchorage fixed strain, to complete system of deep foundation pit support
Construction.
It is an advantage of the invention that：
1. the present invention carries out fried dough twist formula reinforcing bar Pan Liang on the top of adjacent steel pipe support pile, to form a stability height
System of deep foundation pit support, be not only simple in structure, be easy for construction, and difficulty of construction is effectively reduced and shortens the construction period, together
When also strengthen the safety of deep basal pit, be particularly suitable for the deep-foundation pit engineering of the more backfill soil property of severe cold area rubble.
2. the present invention is suitable for the deep foundation pit support in most of soil properties, artificial and auxiliary material used in steel pipe supporting pile driving construction
Seldom, while again reduce a large amount of artificial and materials that measure facility is spent, save traditional bored concrete pile reinforcing bar and concrete
Consumption, save one-time investment.
3. frozen soil layer is thicker when winter construction in severe cold area, and construction area soil property is poor, utilizes down-hole hammer pilot hole
Broken frozen soil and rubble, can effectively ensure that the quality problems of steel pipe support pile during the pile driving process, reduce to steel pipe supporting
The destruction of stake.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and embodiments：
Fig. 1 is system of deep foundation pit support side view of the present invention；
Fig. 2 is system of deep foundation pit support top view of the present invention；
Fig. 3 is steel pipe support pile of the present invention and concrete nail wall connection schematic diagram；
Fig. 4 is the fried dough twist formula reinforcing bar disk beam schematic diagram on steel pipe support pile of the present invention top；
Wherein：1 steel pipe support pile, 2 concrete nail walls, 21 internal layer steel meshes, 22 outer reinforcement nets, 23 pea gravel concretens
Layer；3 anchor cables, 4 anchorages, 41 put more energy into floor, 42 anchor plates, 43 wedge blocks, 44 anchoring pieces, 5 fried dough twist formula reinforcing bar Pan Liang.
Specific embodiment
Embodiment：Shown in 4, a kind of system of deep foundation pit support, including several vertically beat into foundation pit side soil
Intracorporal steel pipe support pile 1, foundation pit side soil body side wall are covered with concrete nail wall 2, and on concrete nail wall 2 into the soil body
It is inserted into several anchor cables 3 obliquely, the anchor cable 3 is while adjacent by being placed in 4 fixed strain of anchorage in the outside of concrete nail wall 2
The top of steel pipe support pile 1 is fixedly connected by fried dough twist formula reinforcing bar disk beam 5, the fried dough twist formula reinforcing bar disk beam 5 using 16 reinforcing bar of Φ into
Row construction, and the high system of deep foundation pit support of a stability is formed by the fried dough twist formula reinforcing bar disk beam 5, be not only simple in structure,
It is easy for construction, and difficulty of construction is effectively reduced and shortens the construction period, while also strengthening the safety of deep basal pit, it is especially suitable
Deep-foundation pit engineering for the more backfill soil property of severe cold area rubble.
Concrete nail wall 2 of the invention includes internal layer steel mesh 21 and outer reinforcement net 22, and is set to internal layer steel mesh
Pea gravel concreten layer 23 between 21 and outer reinforcement net 22；Wherein internal layer steel mesh 21 is fixedly connected with steel pipe support pile 1.
Anchorage 4 of the invention includes that level is fixed on two ribbed stiffeners being correspondingly arranged on 2 side wall of concrete nail wall and up and down
Plate 41, is vertically arranged and is fixed on two anchor plates 42 for putting more energy into 41 outboard end of floor, the wedge block 43 being fixed on anchor plate 42,
And it is fixed on wedge block 43 and is used for the anchoring piece 44 of 3 outboard end of fixed strain anchor cable, the wherein end face outside of wedge block 43
It is vertically arranged with anchor cable 3.
The bottom end of steel pipe support pile 1 of the invention is in sharpening shape, and sharpening length is 20 centimeters, and places stake on its top
Cap, while hardwood damping headblock is placed at the position for being directly subjected to hammer on the pile cover, the steel pipe support pile 1 of sharpening shape can
More smoothly squeeze into the soil body, and pile cover and damping headblock that 1 top of steel pipe support pile is placed can prevent the damage in hammering
Steel pipe support pile 1 has taken into account foundation engineering measure needs while meeting the durability requirements of foundation pit；Adjacent steel pipe simultaneously
Horizontal distance between support pile 1 is 0.35m~0.4m, the diameter 159mm of steel pipe support pile 1, wall thickness 6mm, length be 9m~
12m, and steel pipe support pile 1 injects in hollow setting and in it cement slurry, increases the strength of the mixing pile of steel pipe support pile 1.
Such as the construction method of above-mentioned system of deep foundation pit support, include the following steps：
Step 1：According to measuring stake site is carried out after stake top absolute altitude excavation section by section operation side, then down-hole hammer is transferred extremely
Stake site carries out drawing hole construction, is crushed frozen soil and rubble using down-hole hammer pilot hole, can effectively ensure that steel pipe support pile 1 heavy
Quality problems during stake reduce the destruction to steel pipe support pile 1；
Step 2：Steel pipe support pile 1 is stacked by piling sequencing, and heap puts the bottom end that rear scene carries out steel pipe support pile 1 well
It fines away and constructs, and place pile cover on the top of steel pipe support pile 1；
Step 3：Steel pipe support pile 1 is hung into corresponding stake site and carries out vertical pitching pile, while keeping hammer, pile cover and steel pipe branch
Fender pile 1 is on the same longitudinal axis, and when paying attention to piling, 1~2 meter of impact missing first is formally driven piles after correcting verticality again, then when heavy
To a certain depth and through review pile sinking quality it is good when, be further continued for hitting, until projected depth, if discovery the incipient stage stake position
Not just or inclination, levelling or steel pipe support pile 1 is extracted into inserting piling again；
Step 4：Inject cement slurry into the steel pipe support pile 1 being partially disposed in non cohesire soil, and by adjacent steel pipe branch
The top of fender pile 1 is fixedly connected by fried dough twist formula reinforcing bar disk beam 5；
Step 5：Wall 2 is followed closely in 1 inside excavation pit of steel pipe support pile, and in foundation pit side soil body side wall oversite concrete,
It is inserted into anchor cable 3 obliquely into the soil body on concrete nail wall 2 and passes through 4 fixed strain of anchorage, to complete deep foundation pit support
The construction of system.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of system of deep foundation pit support, which is characterized in that beaten vertically including several into the intracorporal steel pipe branch of foundation pit side soil
Fender pile (1), foundation pit side soil body side wall are covered with concrete nail wall (2), and oblique into the soil body on the concrete nail wall (2)
Be downwardly into several anchor cables (3), the anchor cable (3) by anchorage (4) fixed strain for being placed on the outside of concrete nail wall (2),
The top of adjacent steel pipe support pile (1) is fixedly connected by fried dough twist formula reinforcing bar Pan Liang (5) simultaneously.
2. system of deep foundation pit support according to claim 1, which is characterized in that the concrete nail wall (2) includes internal layer
Steel mesh (21) and outer reinforcement net (22), and be set between the internal layer steel mesh (21) and the outer reinforcement net (22)
Pea gravel concreten layer (23)；Wherein the internal layer steel mesh (21) is fixedly connected with the steel pipe support pile (1).
3. system of deep foundation pit support according to claim 1, which is characterized in that the anchorage (4) is fixed on including level
Two be correspondingly arranged on concrete nail wall (2) side wall and up and down put more energy into floor (41), are vertically arranged and are fixed on two and put more energy into floor
(41) anchor plate (42) of outboard end, the wedge block (43) being fixed on anchor plate (42), and it is fixed on the wedge block
(43) and it to be used for the anchoring piece (44) of fixed strain anchor cable (3) outboard end, wherein the end face outside of wedge block (43) and anchor cable (3)
It is vertically arranged.
4. system of deep foundation pit support according to claim 1, which is characterized in that the bottom end of the steel pipe support pile (1) is in
Sharpening shape, and pile cover is placed on its top.
5. system of deep foundation pit support according to claim 1, which is characterized in that the water between adjacent steel pipe support pile (1)
Flat distance is 0.35m~0.4m.
6. system of deep foundation pit support according to claim 1, which is characterized in that the steel pipe support pile (1) sets in hollow
It sets and injects cement slurry in it.
7. a kind of construction method of such as system of deep foundation pit support as claimed in any one of claims 1 to 6, which is characterized in that including
Following steps：
Step 1：According to measuring stake site is carried out after stake top absolute altitude excavation section by section operation side, down-hole hammer is then transferred to stake position
Point carries out drawing hole construction；
Step 2：Steel pipe support pile (1) is stacked by piling sequencing, and scene carries out the bottom end of steel pipe support pile (1) after heap is put well
It fines away and constructs, and place pile cover on the top of steel pipe support pile (1)；
Step 3：Steel pipe support pile (1) is hung into corresponding stake site and carries out vertical pitching pile, while keeping hammer, pile cover and steel pipe supporting
Stake (1) is on the same longitudinal axis；
Step 4：To injecting cement slurry in the steel pipe support pile (1) being partially disposed in non cohesire soil, and by adjacent steel pipe supporting
The top of stake (1) is fixedly connected by fried dough twist formula reinforcing bar Pan Liang (5)；
Step 5：The excavation pit on the inside of steel pipe support pile (1), and wall (2) are followed closely in foundation pit side soil body side wall oversite concrete,
It is inserted into anchor cable (3) obliquely into the soil body on concrete nail wall (2) and passes through anchorage (4) fixed strain, to complete deep base
Cheat the construction of support system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810687208.3A CN108914942A (en) | 2018-06-28 | 2018-06-28 | A kind of system of deep foundation pit support and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810687208.3A CN108914942A (en) | 2018-06-28 | 2018-06-28 | A kind of system of deep foundation pit support and its construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108914942A true CN108914942A (en) | 2018-11-30 |
Family
ID=64421967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810687208.3A Withdrawn CN108914942A (en) | 2018-06-28 | 2018-06-28 | A kind of system of deep foundation pit support and its construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108914942A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892673A (en) * | 2022-05-25 | 2022-08-12 | 山东曼凯机械化工程有限公司 | Foundation pit supporting construction method |
| CN115341542A (en) * | 2022-09-08 | 2022-11-15 | 中建八局第二建设有限公司 | Breaking hammer with annular clamp and construction method for supporting steel pipe in pit area in deep foundation pit |
-
2018
- 2018-06-28 CN CN201810687208.3A patent/CN108914942A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114892673A (en) * | 2022-05-25 | 2022-08-12 | 山东曼凯机械化工程有限公司 | Foundation pit supporting construction method |
| CN115341542A (en) * | 2022-09-08 | 2022-11-15 | 中建八局第二建设有限公司 | Breaking hammer with annular clamp and construction method for supporting steel pipe in pit area in deep foundation pit |
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| 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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181130 |
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| WW01 | Invention patent application withdrawn after publication |