CN103306289A - Foundation pit piled anchor dado concrete anchor cable top beam structure and construction method thereof - Google Patents

Foundation pit piled anchor dado concrete anchor cable top beam structure and construction method thereof Download PDF

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Publication number
CN103306289A
CN103306289A CN2013102734912A CN201310273491A CN103306289A CN 103306289 A CN103306289 A CN 103306289A CN 2013102734912 A CN2013102734912 A CN 2013102734912A CN 201310273491 A CN201310273491 A CN 201310273491A CN 103306289 A CN103306289 A CN 103306289A
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China
Prior art keywords
anchor
pile
slope protection
concrete
hat
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CN2013102734912A
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Chinese (zh)
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CN103306289B (en
Inventor
孙海友
王钰
张立国
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中国三冶集团有限公司第一建筑工程公司
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Priority to CN201310273491.2A priority Critical patent/CN103306289B/en
Publication of CN103306289A publication Critical patent/CN103306289A/en
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Publication of CN103306289B publication Critical patent/CN103306289B/en

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Abstract

The invention relates to the field of adjacent subsurface structure foundation pits construction, particularly to a foundation pit piled anchor dado concrete anchor cable top beam structure and a construction method thereof. The foundation pit piled anchor dado concrete anchor cable top beam structure is characterized by comprising slope protection piles, top beams, anchor cables and coupling beams and is an integral reinforced concrete structure comprising two rows of slope protection piles, wherein the two rows of slope protection piles arranged at intervals are arranged on two the side walls of two foundation pits respectively; a pre-stressed anchor is arranged between every two adjacent slope protection piles; waist rails used for reinforcement are arranged between the two rows of slope protection piles; pile heads at the top of each row of slope protection piles are connected together through the top beams made of reinforced concretes; the top beams on the slope protection piles in the foundation pits are connected through the coupling beams; the anchor cables are arranged in the coupling beams; the two ends of the anchor cables are connected with the top beams through base plates and anchorage devices. Compared with the prior art, the foundation pit piled anchor dado concrete anchor cable top beam structure has the following advantages: as the two rows of slope protection piles form a steady and firm slope protection system through the anchor cables, the safety of a soil body between two structures is ensured, the construction working plane and transport corridor are increased, the excavated volume and backfill volume are reduced, the construction period is greatly shortened, and the cost is reduced.

Description

Pit pile anchor breast wall concrete anchor cable hat girder construction and job practices thereof

Technical field

The present invention relates to adjacent underground structure foundation pit construction field, relate in particular to a kind of pit pile anchor breast wall concrete anchor cable hat girder construction and job practices thereof.

Background technology

At present in the civil engineering to underground structure, when between adjacent 20~30 meters of two underground structures, need handle the earthwork between two underground structure foundation ditches, wherein a kind of method is that soil between structure is all excavated, finish Deng the underground structure construction, with its backfill, its defective is to have reduced the construction operation face again, has increased amount of excavation and vertical transport cost.

Another kind method is to adopt the pile anchor breast wall structure, inter-pile soil between lagging pile is done some roads prestressing force shank, by horizontal waist rail the prestressing force shank is anchored at slope protection pile, its defective is: when part is as vehicle transport and placing of material ground between with structure, be difficult to guarantee side slope safety, can't effectively utilize area between structure.

Summary of the invention

The purpose of this invention is to provide a kind of pit pile anchor breast wall concrete anchor cable hat girder construction and job practices thereof, do not excavate the earthwork between two underground structures, and assurance is as the safety of placing of material place and vehicle transport passage, increase construction operation face and transport of materials facility, reduce the earthwork and dig freight volume and construction sequence, shorten the construction period.

For achieving the above object, the present invention adopts following technical scheme to realize:

Pit pile anchor breast wall concrete anchor cable hat girder construction, comprise slope protection pile, Guan Liang, anchor cable and coupling beam, this is a whole reinforced concrete structure that is formed by two row's slope protection pile, adjacent wall at two foundation ditches respectively is provided with the slope protection pile that a row arranges at interval, be provided with prestressed anchor between the stake of adjacent slope protection pile, be provided with the waist rail of reinforcing usefulness between the stake of every row's slope protection pile, the pile crown at every row's slope protection pile top links into an integrated entity by the Guan Liang of steel concrete, Guan Liang on the two foundation ditch slope protection pile links to each other by coupling beam, establish anchor cable in the coupling beam, the anchor cable two ends link to each other with Guan Liang by the backing plate beam ground tackle of coming of age, and are distributed with reinforced mesh between slope protection pile.

Be provided with in the described reinforced mesh by the cross-coupled horizontal bar of rinforcement bar and vertical muscle.

Described prestressed anchor is a kind of in prestress wire, solid anchor pole, hollow expansion type rock bolt or the hollow grouting anchor.

Described slope protection pile is reinforced concrete revetment pile, immersed tube bored slope protection pile, stir a kind of in slope protection pile, borehole slope protection pile or the mechanical hole building slope protection pile.

Described waist rail can be the shaped steel waist rail, also can be reinforced concrete waist rail.

The job practices of described pit pile anchor breast wall concrete anchor cable hat girder construction, its concrete construction sequence is:

1) at two predetermined foundation pit side-wall inner sides, the row's concrete revetment pile of constructing at interval separately;

2) after slope protection pile intensity reaches 75% requirement, in time dig out the earthwork of slope protection pile pile crown part, the earthwork is dug to 100 ~ 150mm below the absolute altitude of coupling beam bottom;

3) water the C10 concrete cushion, abolish the pile crown concrete;

4) eject hat beam center line, i.e. slope protection pile center line;

5) reinforcing bar of fabrication and installation Guan Liang;

6) pre-buried anchor cable steel sleeve, backing plate and PVC sleeve pipe;

7) template is installed and is reinforced, cast Guan Liang and coupling beam concrete and maintenance;

8) after the hat beam strength reaches 80%, hat beam anchor cable to be installed and to be begun the pit earthwork excavation, excavation is to the position of lagging pile anchor pole;

9) between slope protection pile, carry out prestressed anchor punching construction, smear sliding agent for one section that before the cast prestressed anchor is run through waist rail, and put the PVC sleeve pipe, carry out prestressed anchor then, mortar depositing construction, slip casting is to the sleeve pipe place;

10) the inter-pile soil body cleaning at prestressed anchor position is rejected totally, the pile body of both sides slope protection pile and the inter-pile soil body of rejecting are cleaned out;

11) with being coated with sliding agent for one section to the stake outside beyond the prestressed anchor grouting port, anchor slab is inserted at the prestressed anchor two ends that are with sleeve pipe, the anchor slab permanent position is in the inboard 100mm scope of slope protection pile outside joint face;

12) at anchor slab outside assembling reinforcement net sheet, fixing spilled water hole, sprayed mortar;

13) waist rail is installed, ground tackle between stake is installed, the stretch-draw prestressing force anchor pole;

14) finish waist rail after, can carry out next step foundation ditch digging.

Described hat beam minimum dimension is 1.2m * 0.7m, and hat beam concrete strength is not less than C30.

In the described step 5), the pile crown reinforcing bar stretches into Guan Liang and is no less than 650mm.

Described step 6) stream line steel sleeve diameter is 90 ~ 100mm, is plain concrete between the two hat beams, and pre-buried PVC plastic pipe runs through coupling beam.

Compared with prior art, the invention has the beneficial effects as follows: 1) adopt hat beam anchor cable structure that soil between two underground structures is effectively reinforced, to form firm bank protection system between two row's slope protection pile, having guaranteed soil body safety between structure, is that a kind of disposal cost is cheap, safe and reliable, the hat beam construction technology of simple and convenient easy row.2) soil body can be used for construction operation face stacking material and transport channel between two adjacent foundation ditches, has reduced excavation of foundation pit amount and backfill amount, has shortened the construction period greatly, has simplified construction sequence, has reduced cost, has accelerated programming.

Description of drawings

Fig. 1 is the plan view from above of the embodiment of the invention;

Fig. 2 is along A-A line sectional view among Fig. 1;

Fig. 3 is along B-B line sectional view among Fig. 2;

Fig. 4 is the structural representation of reinforced mesh in the embodiment of the invention;

Fig. 5 is prestressed anchor anchor structure schematic diagram between slope protection pile of the present invention;

Fig. 6 is the position relational structure schematic diagram of reinforced mesh and anchor slab in the embodiment of the invention;

Fig. 7 is the axial sectional view of Fig. 6;

Fig. 8 is Guan Liang in the embodiment of the invention, slope protection pile and waist rail position elevational schematic view.

Among the figure: ground tackle 15-stake reinforcing bar 16-steel sleeve 17-waist rail between the vertical muscle 14-stake of 1-hat beam 2-slope protection pile 3-coupling beam 4-backing plate 5-hat beam ground tackle 6-anchor cable 7-PVC sleeve pipe 8-support 9-prestressed anchor 10-anchor slab 11-rinforcement bar 12-horizontal bar 13-

The specific embodiment

Below in conjunction with accompanying drawing one step of the specific embodiment of the present invention is illustrated:

See Fig. 1, Fig. 2, Fig. 3, it is pit pile anchor breast wall concrete anchor cable hat girder construction embodiment plan view from above of the present invention, comprise hat beam 1, slope protection pile 2, anchor cable 6 and coupling beam 3, this is a whole reinforced concrete structure that is formed by two row's slope protection pile, respectively be provided with the slope protection pile 2 that a row arranges at interval at two foundation pit side-walls, be provided with prestressed anchor 9 between the stake of adjacent slope protection pile 2, be provided with the waist rail 17 of reinforcing usefulness between the stake of every row's slope protection pile 2, the pile crown at every row's slope protection pile 2 tops links into an integrated entity by the hat beam 1 of steel concrete, hat beam 1 on the two foundation ditch slope protection pile links to each other by coupling beam 3, establish anchor cable 6 in the coupling beam 3, anchor cable 6 two ends by backing plate 4 come of age beam ground tackle 5 with the hat beam 1 link to each other, 2 of slope protection pile are distributed with reinforced mesh.

See Fig. 4, be provided with in the reinforced mesh by rinforcement bar 11 cross-coupled horizontal bar 12 and vertical muscle 13 that vertical muscle 13 welds with stake reinforcing bar 15.

Prestressed anchor is a kind of in prestress wire, solid anchor pole, hollow expansion type rock bolt or the hollow grouting anchor among the embodiment.Slope protection pile is reinforced concrete revetment pile, immersed tube bored slope protection pile, stir a kind of in slope protection pile, borehole slope protection pile or the mechanical hole building slope protection pile.Waist rail 17 can be the shaped steel waist rail, also can be reinforced concrete waist rail.

The job practices of pit pile anchor breast wall concrete anchor cable hat girder construction of the present invention, its concrete construction sequence is:

1) at the inboard correspondence position of two predetermined foundation pit side-walls, the row's concrete revetment pile 2 of constructing at interval separately;

2) after slope protection pile 2 intensity reach 75% requirement, in time dig out the earthwork of slope protection pile 2 pile crowns part, the earthwork is dug to 100 ~ 150mm below the coupling beam 3 bottom absolute altitudes;

3) water the C10 concrete cushion, abolish the pile crown concrete;

4) eject the center line of being preced with beam 1, namely the slope protection pile center line ejects the coupling beam center line;

5) see Fig. 5, the reinforcing bar of fabrication and installation hat beam 1 is extended down to stake reinforcing bar 15 in the hat beam 1;

6) the PVC sleeve pipe 7 in the steel sleeve 16 of pre-buried anchor cable 6 usefulness, backing plate 4 and the coupling beam is established PVC sleeve pipe 7 in the steel sleeve 16, and steel sleeve 16 loads are on support 8, and the bottom surface of support 8 bottom surfaces and coupling beam 3 is contour;

7) template is installed and is reinforced, cast hat beam 1 and coupling beam 3 concrete and maintenance;

8) after hat beam 1 intensity reaches 80%, anchor cable 6 to be installed and to be begun the pit earthwork excavation, excavation is to the position of anchor pole 9;

9) carry out prestressed anchor 9 punching construction 2 of slope protection pile, cast runs through a section of waist rail 17 with prestressed anchor 9 and smears sliding agent preceding, and the prestressed anchor pole 9 then, mortar depositing construction, and slip casting is to anchor slab 10 places;

10) the inter-pile soil body cleaning at prestressed anchor 9 positions is rejected totally, the pile body of both sides slope protection pile 2 and the inter-pile soil body of rejecting are cleaned out;

11) see Fig. 6, with being coated with sliding agent for one section to the stake outside beyond prestressed anchor 9 grouting ports, anchor slab 10 is inserted at prestressed anchor 9 two ends that are with sleeve pipe, anchor slab 10 permanent positions are in the inboard 100mm scope of slope protection pile outside joint face;

12) see Fig. 7, at horizontal bar 12 and the vertical muscle 13 of anchor slab 10 outside assembling reinforcement net sheets, fixing spilled water hole, sprayed mortar, ground tackle 14 is positioned at the end of prestressed anchor 9 between stake;

13) see Fig. 8, waist rail 17 is installed, ground tackle between stake is installed, stretch-draw prestressing force anchor pole, waist rail 17 are used for reinforcing the slope protection pile 2 of hat beam 1 below;

14) finish waist rail after, can carry out next step foundation ditch digging.

Claims (9)

1. the pit pile anchor breast wall concrete anchor cable is preced with girder construction, it is characterized in that, comprise slope protection pile, Guan Liang, anchor cable and coupling beam, this is a whole reinforced concrete structure that is formed by two row's slope protection pile, adjacent wall at two foundation ditches respectively is provided with the slope protection pile that a row arranges at interval, be provided with prestressed anchor between the stake of adjacent slope protection pile, be provided with the waist rail of reinforcing usefulness between the stake of every row's slope protection pile, the pile crown at every row's slope protection pile top links into an integrated entity by the Guan Liang of steel concrete, Guan Liang on the two foundation ditch slope protection pile links to each other by coupling beam, establish anchor cable in the coupling beam, the anchor cable two ends link to each other with Guan Liang by the backing plate beam ground tackle of coming of age, and are distributed with reinforced mesh between slope protection pile.
2. pit pile anchor breast wall concrete anchor cable hat girder construction according to claim 1 is characterized in that, is provided with in the described reinforced mesh by the cross-coupled horizontal bar of rinforcement bar and vertical muscle.
3. pit pile anchor breast wall concrete anchor cable according to claim 1 hat girder construction is characterized in that, described prestressed anchor is a kind of in prestress wire, solid anchor pole, hollow expansion type rock bolt or the hollow grouting anchor.
4. pit pile anchor breast wall concrete anchor cable according to claim 1 hat girder construction is characterized in that, described slope protection pile is reinforced concrete revetment pile, immersed tube bored slope protection pile, stir a kind of in slope protection pile, borehole slope protection pile or the mechanical hole building slope protection pile.
5. pit pile anchor breast wall concrete anchor cable hat girder construction according to claim 1 is characterized in that described waist rail can be the shaped steel waist rail, also can be reinforced concrete waist rail.
6. the pit pile anchor breast wall concrete anchor cable described in the claim 1 is preced with the job practices of girder construction, it is characterized in that its concrete construction sequence is as follows:
1) at two predetermined foundation pit side-wall inner sides, the row's concrete revetment pile of constructing at interval separately;
2) after slope protection pile intensity reaches 75% requirement, in time dig out the earthwork of slope protection pile pile crown part, the earthwork is dug to 100 ~ 150mm below the absolute altitude of coupling beam bottom;
3) water the C10 concrete cushion, abolish the pile crown concrete;
4) eject hat beam center line, i.e. slope protection pile center line;
5) reinforcing bar of fabrication and installation Guan Liang;
6) pre-buried anchor cable steel sleeve, backing plate and PVC sleeve pipe;
7) template is installed and is reinforced, cast Guan Liang and coupling beam concrete and maintenance;
8) after the hat beam strength reaches 80%, hat beam anchor cable to be installed and to be begun the pit earthwork excavation, excavation is to the position of lagging pile anchor pole;
9) between slope protection pile, carry out prestressed anchor punching construction, smear sliding agent for one section that before the cast prestressed anchor is run through waist rail, and put the PVC sleeve pipe, carry out prestressed anchor then, mortar depositing construction, slip casting is to the sleeve pipe place;
10) the inter-pile soil body cleaning at prestressed anchor position is rejected totally, the pile body of both sides slope protection pile and the inter-pile soil body of rejecting are cleaned out;
11) with being coated with sliding agent for one section to the stake outside beyond the prestressed anchor grouting port, anchor slab is inserted at the prestressed anchor two ends that are with sleeve pipe, the anchor slab permanent position is in the inboard 100mm scope of slope protection pile outside joint face;
12) at anchor slab outside assembling reinforcement net sheet, fixing spilled water hole, sprayed mortar;
13) waist rail is installed, ground tackle between stake is installed, the stretch-draw prestressing force anchor pole;
14) finish waist rail after, can carry out next step foundation ditch digging.
7. pit pile anchor breast wall concrete anchor cable hat beam structure construction method according to claim 6 is characterized in that described hat beam minimum dimension is 1.2m * 0.7m, and hat beam concrete strength is not less than C30.
8. pit pile anchor breast wall concrete anchor cable hat beam structure construction method according to claim 6 is characterized in that in the described step 5), the pile crown reinforcing bar stretches into Guan Liang and is no less than 650mm.
9. pit pile anchor breast wall concrete anchor cable hat beam structure construction method according to claim 6 is characterized in that described step 6) stream line steel sleeve diameter is 90 ~ 100mm, is plain concrete between the two hat beams, and pre-buried PVC plastic pipe runs through coupling beam.
CN201310273491.2A 2013-06-28 2013-06-28 Foundation pit piled anchor dado concrete anchor cable top beam structure and construction method thereof CN103306289B (en)

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CN103306289B CN103306289B (en) 2015-04-22

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Cited By (10)

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Publication number Priority date Publication date Assignee Title
CN103821059A (en) * 2014-01-28 2014-05-28 中铁二院工程集团有限责任公司 Lateral restraining and reinforcing structure for stabilizing high-fill embankment with soft oil foundation built on bed rock
CN103850259A (en) * 2014-03-27 2014-06-11 宁波冶金勘察设计研究股份有限公司 Horizontal inner support at capping beam elevation of foundation pit supporting and protecting system and construction method thereof
CN105714830A (en) * 2016-02-03 2016-06-29 华侨大学 Connecting plate for abnormal-shape double-row piles
CN105862878A (en) * 2016-05-30 2016-08-17 建研地基基础工程有限责任公司 Supporting system for deep foundation pit
CN106223344A (en) * 2016-07-26 2016-12-14 北京工业大学 A kind of ground line piled anchor framework foundation pit supporting method
CN106320348A (en) * 2016-08-30 2017-01-11 中建三局第建设工程有限责任公司 Opposite-pulling anchor cable supporting structure for adjacent deep foundation pits and construction method of opposite-pulling anchor cable supporting structure
CN108411926A (en) * 2018-03-29 2018-08-17 中冶成都勘察研究总院有限公司 A kind of tensioning fixation method of stream line
CN108487303A (en) * 2018-04-02 2018-09-04 山东建筑大学 A kind of Complex retaining wall and construction method of support pile and counterfort wall
CN108797600A (en) * 2018-05-21 2018-11-13 青岛建集团有限公司 Miniature steel pipe pile prestressed anchor rope combination supporting construction method
CN110670599A (en) * 2019-09-09 2020-01-10 中冶交通建设集团有限公司 Hollow grouting prestressed anchor rod and construction method thereof

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103821059A (en) * 2014-01-28 2014-05-28 中铁二院工程集团有限责任公司 Lateral restraining and reinforcing structure for stabilizing high-fill embankment with soft oil foundation built on bed rock
CN103850259A (en) * 2014-03-27 2014-06-11 宁波冶金勘察设计研究股份有限公司 Horizontal inner support at capping beam elevation of foundation pit supporting and protecting system and construction method thereof
CN103850259B (en) * 2014-03-27 2016-04-27 宁波冶金勘察设计研究股份有限公司 The horizontal inner support at the capping beam absolute altitude place of foundation pit supporting system and construction method thereof
CN105714830A (en) * 2016-02-03 2016-06-29 华侨大学 Connecting plate for abnormal-shape double-row piles
CN105862878A (en) * 2016-05-30 2016-08-17 建研地基基础工程有限责任公司 Supporting system for deep foundation pit
CN105862878B (en) * 2016-05-30 2018-01-09 建研地基基础工程有限责任公司 A kind of support system of deep basal pit
CN106223344A (en) * 2016-07-26 2016-12-14 北京工业大学 A kind of ground line piled anchor framework foundation pit supporting method
CN106223344B (en) * 2016-07-26 2018-07-13 北京工业大学 A kind of ground line piled anchor frame foundation pit supporting method
CN106320348A (en) * 2016-08-30 2017-01-11 中建三局第建设工程有限责任公司 Opposite-pulling anchor cable supporting structure for adjacent deep foundation pits and construction method of opposite-pulling anchor cable supporting structure
CN108411926A (en) * 2018-03-29 2018-08-17 中冶成都勘察研究总院有限公司 A kind of tensioning fixation method of stream line
CN108487303A (en) * 2018-04-02 2018-09-04 山东建筑大学 A kind of Complex retaining wall and construction method of support pile and counterfort wall
CN108797600A (en) * 2018-05-21 2018-11-13 青岛建集团有限公司 Miniature steel pipe pile prestressed anchor rope combination supporting construction method
CN110670599A (en) * 2019-09-09 2020-01-10 中冶交通建设集团有限公司 Hollow grouting prestressed anchor rod and construction method thereof

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