CN109898521A - A kind of anchored pile supporting and construction method for foundation pit external corner - Google Patents
A kind of anchored pile supporting and construction method for foundation pit external corner Download PDFInfo
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- CN109898521A CN109898521A CN201910282071.8A CN201910282071A CN109898521A CN 109898521 A CN109898521 A CN 109898521A CN 201910282071 A CN201910282071 A CN 201910282071A CN 109898521 A CN109898521 A CN 109898521A
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- foundation pit
- campshed
- external corner
- prestress anchorage
- anchorage cable
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Abstract
The invention discloses a kind of anchored pile supportings and construction method for foundation pit external corner, the structure includes crown beam, campshed, to drawing prestress anchorage cable and waist rail, the campshed is laid along the two sides crater wall of foundation pit external corner, is connected at the top of campshed with crown beam, campshed waist is connected with waist rail；Described is horizontally arranged in foundation pit external corner drawing prestress anchorage cable, connect respectively with the waist rail of foundation pit external corner two sides to the both ends for drawing prestress anchorage cable, forms isosceles triangle to the waist rail for drawing prestress anchorage cable and foundation pit external corner two sides.The present invention is by avoiding the problems such as anchor cable in traditional foundation pit external corner anchored pile supporting intersects and jeopardizes the stability of shallow foundation building, more securely and reliably to drawing prestress anchorage cable to apply prestressing force to the external corner soil body of institute's supporting foundation pit.The invention is characterized in that saving anchoring section material in traditional cable bolting to the anchored pile supporting for drawing prestress anchorage cable, reducing cost, simplify working procedure.
Description
Technical field
The invention belongs to geotechnical engineering fields, are related to a kind of anchored pile supporting and construction party for foundation pit external corner
Method.
Background technique
In recent years, with the high speed development of China's modernization construction, great success is achieved in terms of infrastructure construction.One
A little heavy constructions are rised sheer from level ground.Many buildings have 1-3 layers of basement or underground garage, therefore corresponding excavation of foundation pit depth
All very big, the safety problem of foundation pit causes extensive concern.Especially for the external corner of foundation pit, due to self structure problem,
Institute's bearing load is bigger, it is easier to collapse.Therefore, how to better ensure that the soil body safety at foundation pit external corner, become
It obtains more and more important.It is traditionally used for the piled anchor structure of foundation pit external corner supporting at present, since all to need drilling to squeeze into pre- for two sides crater wall
There are the anchor cable quantity of consuming is more, and there is anchor cable intersection in stress anchor cable；Especially when the foundation pit sun of required supporting
When angle is adjacent to shallow foundation building, traditional pile-anchor retaining method can generate very big shadow to the stability of shallow foundation building
It rings, or even shallow foundation building is damaged.
In consideration of it, anchor cable issuable for traditional anchored pile supporting intersects and influences shallow foundation structure stability
The problem of, it needs to invent a kind of novel anchored pile supporting for foundation pit external corner at present.
Summary of the invention
To solve the above problems existing in the prior art, the present invention, which will design, a kind of can improve foundation pit external corner general safety
Property, save material and reduce cost the anchored pile supporting and construction method for foundation pit external corner.
To achieve the goals above, technical scheme is as follows: a kind of anchored pile supporting for foundation pit external corner,
Including crown beam, campshed, to drawing prestress anchorage cable and waist rail, two sides crater wall laying of the campshed along foundation pit external corner, campshed top
Portion is connected with crown beam, and campshed waist is connected with waist rail；It is described to draw prestress anchorage cable to be horizontally arranged in foundation pit external corner,
The both ends for drawing prestress anchorage cable are connect with the waist rail of foundation pit external corner two sides respectively, to drawing prestress anchorage cable and foundation pit external corner two sides
Waist rail form isosceles triangle.
Further, described that the both ends for drawing prestress anchorage cable are fixedly connected with anchorage respectively, anchorage and waist rail it
Between wedge and cushion block, the wedge and cushion block are set are bolted on waist rail.
Further, it is equidistant between adjacent campshed and campshed.
Further, described a plurality of to drawing prestress anchorage cable to have, it is a plurality of that drawing prestress anchorage cable is arranged in parallel.
Further, the waist rail has a plurality of, uniformly distributed along campshed up and down direction.
Further, the anchorage includes anchor head, wedge and cushion block, be arranged between the anchor head and waist rail wedge and
Cushion block.
A kind of construction method of the anchored pile supporting for foundation pit external corner, includes the following steps:
A, campshed is constructed
Before being excavated to foundation pit external corner, first construct to Row Piles Supporting Structure:
Place cleaning measures positioning, setting-out to campshed stake holes；According to the stake position construction campshed determined: setting up stake
Machine, installation piling machine are mobile in place, hang stake, pitching pile, hammering sinkings, pile extension, hammering to projected depth, pile sinking completion, in steel-pipe pile
Concrete perfusion.
B, crown beam is constructed
Crown beam is the reinforced beam of horizontal layout, and the top of each campshed is fastenedly connected with crown beam to be integrated.Into
Before the construction of row crown beam, absolute altitude measures campshed stake top as required, and all absolute altitudes exceed campshed of the requirement other than 10cm all
Carry out chisel pile crown work, it is ensured that the pile crown dug out is smooth；It digs stake after hours, starts to carry out crown beam construction；Crown beam construction point
Duan Jinhang, directly mold is made in grooving in soil；Ensure that unwrapping wire is accurate in construction, die wall is straight, and Molded Depth is consistent, is poured laggard
Row maintenance.
C, excavation of foundation pit
After having excavation of foundation pit condition, the excavation of foundation pit external corner is vertically carried out along campshed, and beat into inter-pile soil soil nailing,
Steel mesh and gunite concrete surface layer are hung, foundation pit external corner crater wall surface is arranged drainage hole, does rubble loaded filter after drainage hole.Successively
It excavates, is completed until excavating.
D, to drawing construction prestressed cable
Excavation of foundation pit carries out wanting according to design to construction prestressed cable is drawn to below to drawing prestress anchorage cable projected depth
It asks and carries out to drawing prestress anchorage cable line setting；It is carried out to prestress anchorage cable drilling is drawn, before drilling in advance using armature boring machine
Production will be inserted into anchor cable hole to drawing prestress anchorage cable to prestress anchorage cable is drawn.
E, waist rail is installed
Waist rail is placed on predetermined position, anchorage is installed.
F, to drawing prestressed anchor cable stretching
The one end for drawing prestress anchorage cable will be first fixedly connected with anchor head, wedge and pad are set between anchor head and waist rail
Block, then to drawing the prestress anchorage cable other end to carry out tensioning, the tensioning of drawing prestress anchorage cable is used based on Stress Control, is stretched
Method supplemented by long amount.Until reaching design lock value, stop tensioning.
G, terminate
C is gone to step, continues vertically to carry out next stage excavation along campshed, until completing to the pile-anchor retaining for drawing prestress anchorage cable
The construction of structure.
H, it recycles
It is backfilled after the completion of main structure construction, when being backfilled to anchorage position from bottom to top, dismantles anchorage, extracted steel and twist
Line.
Compared with prior art, the invention has the advantages that
1, safe and reliable: the present invention is by being answered in advance the external corner soil body application of institute's supporting foundation pit drawing prestress anchorage cable
Power avoids the stability etc. that the anchor cable in traditional foundation pit external corner anchored pile supporting intersects and jeopardize shallow foundation building
Problem, more securely and reliably.
2, material saving low price: the invention is characterized in that the anchored pile supporting for drawing prestress anchorage cable, traditional anchor cable is saved
Anchoring section material in supporting, reduces cost.
3, reduce process: the present invention is due to reducing a large amount of brill using to the anchored pile supporting for drawing prestress anchorage cable
Hole work, it is often more important that eliminate anchoring section, simplify working procedure.
4, recycling is convenient: after the completion of to be onstructed, can carry out disassembly & recycling, simple side when carrying out backfill to anchor head structure
Just.
Detailed description of the invention
Fig. 1 is the schematic diagram of structure of the invention.
Fig. 2 is the general layout schematic diagram of Fig. 1.
Fig. 3 is partial enlarged view at the A of Fig. 2.
Fig. 4 is the anchor cable face sectional view of structure of the invention.
Fig. 5 is the inter-pile soil supporting elevation of structure of the invention.
In figure: 1, crown beam；2, campshed；3, to drawing prestress anchorage cable；4, waist rail；5, anchor head；6, building；7, anchorage；8,
Wedge；9, cushion block；10, soil nailing；11, drainage hole；12, steel mesh；13, concrete topping.
Specific embodiment
The present invention is further described through with reference to the accompanying drawing.As shown in Figs. 1-5, a kind of stake for foundation pit external corner
Anchor supporting construction, including crown beam 1, campshed 2, to prestress anchorage cable 3 and waist rail 4 is drawn, the campshed 2 is along the two sides of foundation pit external corner
Crater wall is laid, and 2 top of campshed is connected with crown beam 1, and 2 waist of campshed is connected with waist rail 4；It is described to drawing prestress anchorage cable 3
It is horizontally arranged in foundation pit external corner, the both ends for drawing prestress anchorage cable 3 is connect with the waist rail 4 of foundation pit external corner two sides respectively, to drawing
Prestress anchorage cable 3 and the waist rail 4 of foundation pit external corner two sides form isosceles triangle.
Further, described that the both ends for drawing prestress anchorage cable 3 are fixedly connected with anchorage 5 respectively, in anchorage 5 and waist rail
Wedge 8 is set between 4 and cushion block 9, the wedge 8 and cushion block 9 are bolted on waist rail 4.
Further, it is equidistant between adjacent campshed 2 and campshed 2.
Further, described a plurality of to drawing prestress anchorage cable 3 to have, it is a plurality of that drawing prestress anchorage cable 3 is arranged in parallel.
Further, the waist rail 4 has a plurality of, uniformly distributed along 2 up and down direction of campshed.
Further, the anchorage 5 includes anchor head 7, wedge 8 and cushion block 9, is arranged between the anchor head 7 and waist rail 4
Wedge 8 and cushion block 9.
A kind of construction method of the anchored pile supporting for foundation pit external corner, includes the following steps:
A, campshed 2 is constructed
Before being excavated to foundation pit external corner, first construct to 2 supporting construction of campshed:
Place cleaning measures positioning, setting-out to campshed stake holes；According to the stake position construction campshed 2 determined: setting up stake
Machine, installation piling machine are mobile in place, hang stake, pitching pile, hammering sinkings, pile extension, hammering to projected depth, pile sinking completion, in steel-pipe pile
Concrete perfusion.
B, crown beam 1 is constructed
Crown beam 1 is the reinforced beam of horizontal layout, and the top of each campshed 2 is fastenedly connected with crown beam 1 to be integrated.?
Before carrying out the construction of crown beam 1, absolute altitude measures campshed stake top as required, and all absolute altitudes are beyond the campshed required other than 10cm
2 all carry out chisel pile crown work, it is ensured that the pile crown dug out is smooth；It digs stake after hours, starts to carry out the construction of crown beam 1；Crown beam 1 is applied
Work point section carries out, and directly mold is made in grooving in soil；Ensure that unwrapping wire is accurate in construction, die wall is straight, and Molded Depth is consistent, is poured
After conserved.
C, excavation of foundation pit
After having excavation of foundation pit condition, the excavation of foundation pit external corner is vertically carried out along campshed 2, and soil nailing is beaten into inter-pile soil
10, steel mesh 12 and gunite concrete surface layer 13 are hung, foundation pit external corner crater wall surface is arranged drainage hole 11, does rubble after drainage hole 11
Loaded filter.It successively excavates, is completed until excavating.
D, it constructs to drawing prestress anchorage cable 3
Excavation of foundation pit is carried out to below to drawing 3 projected depth of prestress anchorage cable to drawing prestress anchorage cable 3 to construct, according to design
It is required that carrying out to drawing 3 line setting of prestress anchorage cable；Drill to drawing prestress anchorage cable 3 using armature boring machine, before drilling
It is made in advance to prestress anchorage cable 3 is drawn, anchor cable hole will be inserted into drawing prestress anchorage cable 3.
E, waist rail 4 is installed
Waist rail 4 is placed on predetermined position, anchorage 5 is installed.
F, to drawing 3 tensioning of prestress anchorage cable
The one end for drawing prestress anchorage cable 3 will be first fixedly connected with anchor head 7, wedge 8 is set between anchor head 7 and waist rail 4
With cushion block 9, then to draw 3 other end of prestress anchorage cable carry out tensioning, to draw prestress anchorage cable 3 tensioning use with Stress Control
Based on, the method supplemented by elongation.Until reaching design lock value, stop tensioning.
G, terminate
C is gone to step, continues vertically to carry out next stage excavation along campshed 2, until completing to the piled anchor branch for drawing prestress anchorage cable 3
The construction of protection structure.
H, it recycles
It is backfilled after the completion of main structure construction, when being backfilled to 5 position of anchorage from bottom to top, dismantles anchorage 5, extract steel
Twisted wire.
Foundation pit shown in FIG. 1 is located near building 6, by abovementioned technology, ensure that the stabilization of supporting construction
Property and safety, improve integer support structural strength, realize the stable purpose of foundation pit external corner.
The present invention is not limited to the present embodiment, any equivalent concepts within the technical scope of the present disclosure or changes
Become, is classified as protection scope of the present invention.
Claims (7)
1. a kind of anchored pile supporting for foundation pit external corner, it is characterised in that: including crown beam (1), campshed (2), answered in advance drawing
Power anchor cable (3) and waist rail (4), the campshed (2) are laid along the two sides crater wall of foundation pit external corner, campshed (2) top and crown beam (1)
It is connected, campshed (2) waist is connected with waist rail (4)；Described is horizontally arranged at foundation pit external corner to drawing prestress anchorage cable (3)
It is interior, to draw prestress anchorage cable (3) both ends connect respectively with the waist rail (4) of foundation pit external corner two sides, to draw prestress anchorage cable (3) and
The waist rail (4) of foundation pit external corner two sides forms isosceles triangle.
2. a kind of anchored pile supporting for foundation pit external corner according to claim 1, it is characterised in that: described to drawing
The both ends of prestress anchorage cable (3) are fixedly connected with anchorage (5) respectively, between anchorage (5) and waist rail (4) be arranged wedge (8) and
Cushion block (9), the wedge (8) and cushion block (9) are bolted on waist rail (4).
3. a kind of anchored pile supporting for foundation pit external corner according to claim 1, it is characterised in that: adjacent campshed
(2) it is equidistant between campshed (2).
4. a kind of anchored pile supporting for foundation pit external corner according to claim 1, it is characterised in that: described to drawing
Prestress anchorage cable (3) have it is a plurality of, it is a plurality of to draw prestress anchorage cable (3) be arranged in parallel.
5. a kind of anchored pile supporting for foundation pit external corner according to claim 1, it is characterised in that: the waist rail
(4) have a plurality of, along campshed (2), up and down direction is uniformly distributed.
6. a kind of anchored pile supporting for foundation pit external corner according to claim 1, it is characterised in that: the anchorage
(5) include anchor head (7), wedge (8) and cushion block (9), wedge (8) and cushion block are set between the anchor head (7) and waist rail (4)
(9)。
7. a kind of construction method of the anchored pile supporting for foundation pit external corner, characterized by the following steps:
A, campshed (2) is constructed
Before being excavated to foundation pit external corner, first construct to campshed (2) supporting construction:
Place cleaning measures positioning, setting-out to campshed stake holes；It constructs campshed (2) according to the stake position determined: setting up stake
Machine, installation piling machine are mobile in place, hang stake, pitching pile, hammering sinkings, pile extension, hammering to projected depth, pile sinking completion, in steel-pipe pile
Concrete perfusion；
B, crown beam (1) is constructed
Crown beam (1) is the reinforced beam of horizontal layout, and the top of each campshed (2) is fastenedly connected with crown beam (1) to be integrated；
Before carrying out crown beam (1) construction, absolute altitude measures campshed stake top as required, and all absolute altitudes are beyond requirement other than 10cm
Campshed (2) all carries out chisel pile crown work, it is ensured that the pile crown dug out is smooth；It digs stake after hours, starts progress crown beam (1) and apply
Work；Crown beam (1) construction segmentation carries out, and directly mold is made in grooving in soil；Ensure that unwrapping wire is accurate in construction, die wall is straight, Molded Depth
Unanimously, it is conserved after being poured；
C, excavation of foundation pit
After having excavation of foundation pit condition, the excavation of foundation pit external corner is vertically carried out along campshed (2), and soil nailing is beaten into inter-pile soil
(10), steel mesh (12) and gunite concrete surface layer (13) are hung, drainage hole (11) are arranged in foundation pit external corner crater wall surface, drainage hole
(11) rubble loaded filter is done after；It successively excavates, is completed until excavating；
D, to drawing prestress anchorage cable (3) construction
Excavation of foundation pit is carried out to below to drawing prestress anchorage cable (3) projected depth to drawing prestress anchorage cable (3) to construct, according to design
It is required that carrying out to drawing prestress anchorage cable (3) line setting；Bore to prestress anchorage cable (3) drilling is drawn using armature boring machine
It is made in advance before hole to prestress anchorage cable (3) are drawn, anchor cable hole will be inserted into drawing prestress anchorage cable (3)；
E, waist rail (4) is installed
Waist rail (4) is placed on predetermined position, is installed anchorage (5)；
F, to drawing prestress anchorage cable (3) tensioning
The one end for drawing prestress anchorage cable (3) will be first fixedly connected with anchor head (7), is arranged between anchor head (7) and waist rail (4) oblique
Iron (8) and cushion block (9), then to drawing prestress anchorage cable (3) other end to carry out tensioning, the tensioning for drawing prestress anchorage cable (3) is adopted
To based on Stress Control, the method supplemented by elongation；Until reaching design lock value, stop tensioning；
G, terminate
C is gone to step, continues vertically to carry out next stage excavation along campshed (2), until completing to the piled anchor branch for drawing prestress anchorage cable (3)
The construction of protection structure；
H, it recycles
It is backfilled after the completion of main structure construction, when being backfilled to anchorage (5) position from bottom to top, dismantles anchorage (5), extract steel
Twisted wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910282071.8A CN109898521A (en) | 2019-04-09 | 2019-04-09 | A kind of anchored pile supporting and construction method for foundation pit external corner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910282071.8A CN109898521A (en) | 2019-04-09 | 2019-04-09 | A kind of anchored pile supporting and construction method for foundation pit external corner |
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| CN109898521A true CN109898521A (en) | 2019-06-18 |
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ID=66954607
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| CN201910282071.8A Pending CN109898521A (en) | 2019-04-09 | 2019-04-09 | A kind of anchored pile supporting and construction method for foundation pit external corner |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749249A (en) * | 2020-07-23 | 2020-10-09 | 牛斌 | Building enclosure construction method for protecting existing building in foundation pit |
| CN112323822A (en) * | 2020-11-30 | 2021-02-05 | 中国电建集团福建省电力勘测设计院有限公司 | Pipe gallery foundation pit with tension and compression support |
| CN112627249A (en) * | 2020-12-07 | 2021-04-09 | 马鞍山钢铁建设集团有限公司 | Construction method for shallow foundation reinforcement |
| CN116464041A (en) * | 2023-04-24 | 2023-07-21 | 中铁一局集团市政环保工程有限公司 | Recyclable prestressed anchor cable and construction method |
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| NO943196L (en) * | 1993-08-31 | 1995-03-01 | Petroleo Brasileiro Sa | Foundation system for tensioning platform |
| CN204370417U (en) * | 2014-11-13 | 2015-06-03 | 昆明理工大学 | A kind of for base pit engineering external corner or the road place of going along with sb. to guard him to drawing cable bolting structure |
| CN204753602U (en) * | 2015-03-29 | 2015-11-11 | 郑州大学 | Subassembly is strutted to foundation ditch external corner position self -balancing |
| CN208201885U (en) * | 2018-05-03 | 2018-12-07 | 云南建投基础工程有限责任公司 | A kind of supporting construction at multiple external corners continuous in base pit engineering |
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2019
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO943196L (en) * | 1993-08-31 | 1995-03-01 | Petroleo Brasileiro Sa | Foundation system for tensioning platform |
| CN204370417U (en) * | 2014-11-13 | 2015-06-03 | 昆明理工大学 | A kind of for base pit engineering external corner or the road place of going along with sb. to guard him to drawing cable bolting structure |
| CN204753602U (en) * | 2015-03-29 | 2015-11-11 | 郑州大学 | Subassembly is strutted to foundation ditch external corner position self -balancing |
| CN208201885U (en) * | 2018-05-03 | 2018-12-07 | 云南建投基础工程有限责任公司 | A kind of supporting construction at multiple external corners continuous in base pit engineering |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749249A (en) * | 2020-07-23 | 2020-10-09 | 牛斌 | Building enclosure construction method for protecting existing building in foundation pit |
| CN111749249B (en) * | 2020-07-23 | 2022-03-08 | 北京城建设计发展集团股份有限公司 | Building enclosure construction method for protecting existing building in foundation pit |
| CN112323822A (en) * | 2020-11-30 | 2021-02-05 | 中国电建集团福建省电力勘测设计院有限公司 | Pipe gallery foundation pit with tension and compression support |
| CN112323822B (en) * | 2020-11-30 | 2024-04-02 | 中国电建集团福建省电力勘测设计院有限公司 | Piping lane foundation ditch with pull-press support |
| CN112627249A (en) * | 2020-12-07 | 2021-04-09 | 马鞍山钢铁建设集团有限公司 | Construction method for shallow foundation reinforcement |
| CN116464041A (en) * | 2023-04-24 | 2023-07-21 | 中铁一局集团市政环保工程有限公司 | Recyclable prestressed anchor cable and construction method |
| CN116464041B (en) * | 2023-04-24 | 2023-10-03 | 中铁一局集团市政环保工程有限公司 | Recyclable prestressed anchor cable and construction method |
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Application publication date: 20190618 |
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