CN201228356Y - Pit anchored pile-anchor breast wall concrete middle beam structure - Google Patents

Pit anchored pile-anchor breast wall concrete middle beam structure Download PDF

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Publication number
CN201228356Y
CN201228356Y CNU2008203010753U CN200820301075U CN201228356Y CN 201228356 Y CN201228356 Y CN 201228356Y CN U2008203010753 U CNU2008203010753 U CN U2008203010753U CN 200820301075 U CN200820301075 U CN 200820301075U CN 201228356 Y CN201228356 Y CN 201228356Y
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China
Prior art keywords
pile
concrete
anchor
slope protection
breast beam
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Expired - Fee Related
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CNU2008203010753U
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Chinese (zh)
Inventor
胡裕新
于大海
王华萍
汪亚冬
刘爱玲
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BEIJING LIUJIAN CONSTRUCTION Corp
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BEIJING LIUJIAN CONSTRUCTION Corp
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Priority to CNU2008203010753U priority Critical patent/CN201228356Y/en
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Publication of CN201228356Y publication Critical patent/CN201228356Y/en
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Abstract

The utility model relates to a concrete waist beam structure with a pile-anchor retaining wall in a foundation ditch. Prestressed anchor rods are fixed in inter-pile soils at the inter-pile parts between slope protection piles; transverse concrete waist beams are also arranged on the side wall of the foundation ditch, are positioned between the slope protection piles, and are connected with the prestressed anchor rods in a casting manner; the lateral surfaces of the transverse concrete waist beams are flush with pile body scarfskins of the concrete slope protection piles, the medial surfaces thereof close to pile body inner-ends of the concrete slope protection piles, and reinforced nets are distributed at the inner parts thereof close to the lateral surfaces; the reinforced nets coat outside pile bodies of the concrete slope protection piles and are connected with the prestressed anchor rods between the piles through anchor slabs; the prestressed anchor rods are anchored into the inter-pile soils from the side wall of the foundation ditch; and anchor heads of the prestressed anchor rods are positioned inside an external joint face of the concrete slope protection piles. The conditions that a figured iron waist beam and prestressed anchor heads are protruded from the pile bodies are changed, the excavated volume of the foundation ditch is reduced, a hanging device for hanging the figured iron waist beam is not needed, the construction time is shortened greatly, the construction steps are simplified, and the construction cost is lowered.

Description

Pit pile anchor breast wall concrete breast beam structure
Technical field
The utility model relates to a kind of architectural engineering pit supporting and protection structure.
Background technology
In foundation engineering, traditional deep foundation pit support usually adopts the pile anchor breast wall structure, makes some roads prestressed anchor in the inter-pile soil between slope protection pile, by horizontal shaped steel waist rail prestressed anchor is anchored at slope protection pile.Its defective is, when engineering works with pile body during as the structure outer edge, the shaped steel waist rail of outstanding pile body and prestressing force anchor head just must be removed.And this moment, if the structure finished of having constructed do not form as yet to slope protection pile to the top off-load, removing the shaped steel waist rail rashly will influence construction safety, takes place in order to prevent engineering accident, usually delays the duration.Simultaneously, shaped steel waist rail and prestressed anchor head process go out outside pile body, have taken the foundation ditch space of bulk, make that the excavated volume of foundation ditch is very big, the time that this had both increased construction, increased the cost of constructing again, and wasted wide variety of materials.In addition, traditional shaped steel waist rail need adopt hanging device to lift, and this has also increased the time and the loaded down with trivial details degree of construction.
The utility model content
The purpose of this utility model provides a kind of pit pile anchor breast wall concrete breast beam structure, solve in the pile anchor breast wall structure, removes the technical problem that the shaped steel waist rail can influence construction safety, delay the duration; And solve traditional architectural engineering pit support construction overlong time, and waste material is too much, and construction is complicated, the problem that construction cost is too high.
For achieving the above object, the utility model adopts following technical scheme:
A kind of pit pile anchor breast wall concrete breast beam structure, the slope protection pile that in foundation pit side-wall, has a row to be provided with at interval, the position is stretched in inter-pile soil and is fixed with prestressed anchor between the stake of slope protection pile, also be furnished with horizontal waist rail on the foundation pit side-wall, it is characterized in that: above-mentioned waist rail is a concrete breast beam, this concrete breast beam is positioned between the stake of concrete revetment pile, and be connected with prestressed anchor cast, the lateral surface of concrete breast beam is concordant with the pile body crust of concrete revetment pile, the medial surface of concrete breast beam is near pile body the inner of concrete revetment pile, concrete breast beam is inner, and punishment is furnished with reinforced mesh near lateral surface, above-mentioned reinforced mesh is coated on the pile body outside of this row's concrete revetment pile, and be connected with the anchor slab of prestressed anchor between stake, above-mentioned prestressed anchor is in foundation pit side-wall anchors into inter-pile soil, its anchor head is positioned at the inboard of this row's concrete revetment pile outside joint face,, does not protrude in foundation pit side-wall that is.
As the further optimized technical scheme of the utility model:
Above-mentioned reinforced mesh can be formed by elongated horizontal bar and elongated vertical muscle interconnection, and elongated horizontal bar is walked around concrete revetment pile, is positioned at the anchor slab inboard.
Above-mentioned concrete breast beam can be at anchor slab the right and left symmetrical distribution bearing rod and shearing resistance stirrup, and described bearing rod has four, is positioned at four edges of shearing resistance stirrup, the vertical angle at 45 of above-mentioned shearing resistance stirrup and waist rail, and bearing rod vertically becomes 22.5 ° of angles with waist rail.
Above-mentioned prestressed anchor can be prestressing force steel hinge line, solid anchor pole, hollow self-feeding anchor pile, hollow expansion type rock bolt or hollow grouting anchor.
Above-mentioned slope protection pile can be reinforced concrete revetment pile, immersed tube bored slope protection pile, stirring slope protection pile, borehole slope protection pile or mechanical hole building slope protection pile.
Compared with prior art the utlity model has following characteristics and beneficial effect:
The utility model does not use the shaped steel waist rail, employing is in the structure of concrete revetment pile gap concreting waist rail, suitable configuration reinforcement in the concrete breast beam, prestressed anchor is anchored in the concrete breast beam, utilize the resistance to tension and the concrete shear resistance that are in concrete punching failure face both sides reinforcing bar in the concrete breast beam, the anchored force of prestress wire is transferred on the pile body.
The utility model is that a kind of disposal cost is cheap, and safe and reliable, simple and easy to do waist rail construction technology is compared with conventional levels shaped steel waist rail, and its advantage is as follows:
1, the concrete breast beam external surface is concordant with the concrete revetment pile pile body, has changed the situation that shaped steel waist rail and prestressed anchor head process go out pile body, makes pattern foundation pit supporting structure keep stable from start to finish.
2, owing to need not to consider that shaped steel waist rail and prestressed anchor head process go out the shared foundation ditch space of pile body, can reduce the excavated volume of foundation ditch, do not re-use simultaneously the shaped steel waist rail, need not to adopt the hanging device of lifting shaped steel waist rail, this has all shortened the engineering time greatly, simplify construction sequence, reduced construction cost.
3, adopt the utility model, with situation that shaped steel waist rail intensity equates under, the concrete breast beam part of constructing material therefor expense only is 30～40% of a conventional construction method.
4, the concrete breast beam gain in strength is basic and prestressed anchor is synchronous, can not prolong construction period.
5, the concrete breast beam job practices is simpler, practical.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 is the facade structures schematic diagram of the utility model embodiment one.
Fig. 2 is the horizontal profile structure schematic diagram of the utility model embodiment one.
Fig. 3 is the schematic diagram that the utility model configuration anti-impact is cut stirrup and bearing rod.
Fig. 4 is the schematic diagram of A-A section among Fig. 3.
Fig. 5 is the structural representation that the utility model is rejected the inter-pile soil body.
Fig. 6 is the utility model prestressed anchor anchor structure schematic diagram.
Fig. 7 is the position relational structure schematic front view of reinforced mesh and anchor slab.
Fig. 8 is the schematic side view of Fig. 7.
Fig. 9 is the facade structures schematic diagram of the utility model embodiment two.
Figure 10 is the horizontal profile structure schematic diagram of the utility model embodiment two.
Reference numeral: the inter-pile soil body of 1-slope protection pile, 2-concrete breast beam, 3-prestressed anchor, 4-anchor head, 5-anchor slab, 6-elongated horizontal bar, 7-elongated vertical muscle, 8-inter-pile soil, 9-shearing resistance stirrup, 10-bearing rod, 11-box template, 12-rejecting.
The specific embodiment
Embodiment is referring to Fig. 1, shown in Figure 2, this pit pile anchor breast wall concrete breast beam structure, the slope protection pile 1 that in foundation pit side-wall, has a row to be provided with at interval, the position is stretched in inter-pile soil 8 and is fixed with prestressed anchor 3 between the stake of slope protection pile, also be furnished with horizontal waist rail on the foundation pit side-wall, above-mentioned waist rail is a concrete breast beam 2, this concrete breast beam 2 is positioned between the stake of concrete revetment pile 1, and be connected with prestressed anchor 3 cast, the lateral surface of concrete breast beam 2 is concordant with the pile body crust of concrete revetment pile 1, the medial surface of concrete breast beam is near pile body the inner of concrete revetment pile, concrete breast beam is inner, and punishment is furnished with reinforced mesh near lateral surface, above-mentioned reinforced mesh is coated on the pile body outside of this row's concrete revetment pile 1, and be connected with the anchor slab 5 of prestressed anchor 3 between stake, above-mentioned prestressed anchor 3 is in foundation pit side-wall anchors into inter-pile soil 8, and its anchor head 4 is positioned at the inboard of this row's concrete revetment pile 1 outside joint face, that is, do not protrude in foundation pit side-wall.
Above-mentioned reinforced mesh is formed by elongated horizontal bar 6 and elongated vertical muscle 7 interconnections, and elongated horizontal bar 6 is walked around concrete revetment pile 1, is positioned at the anchor slab inboard.
Referring to Fig. 3, Fig. 4, above-mentioned concrete breast beam 2 is at anchor slab the right and left symmetrical distribution bearing rod 10 and shearing resistance stirrup 9, described bearing rod 10 has four, be positioned at four edges of shearing resistance stirrup 9, above-mentioned shearing resistance stirrup 9 and the vertical angle at 45 of waist rail, bearing rod 10 vertically becomes 22.5 ° of angles with waist rail.
Above-mentioned prestressed anchor 3 is prestressing force steel hinge line, solid anchor pole, hollow self-feeding anchor pile, hollow expansion type rock bolt or hollow grouting anchor.
Above-mentioned slope protection pile is reinforced concrete revetment pile, immersed tube bored slope protection pile, stirring slope protection pile, borehole slope protection pile or mechanical hole building slope protection pile.
A kind of job practices of pit pile anchor breast wall concrete breast beam structure is characterized in that construction sequence is:
Step 1, at the predetermined foundation pit side-wall inner side row's concrete revetment pile of constructing at interval.
Step 2, carry out excavation and construction, be excavated to the position of prestressed anchor in predetermined foundation ditch position.
Referring to Fig. 5, Fig. 6, step 3, between stake, carry out the prestressed anchor drilling construction, before the slip casting, prestressed anchor is run through a section of waist rail smear sliding agent, and put the internal diameter polystyrene plastics teleflex identical with prestressing steel wire bunch, carry out the prestressed anchor mortar depositing construction then, slip casting is advisable to annotate polystyrene sleeve pipe place.Prestressed anchor perform the position, should be in same horizontal level as far as possible.To guarantee the stressed symmetry of next step concrete breast beam that performs, even.
Step 4, the inter-pile soil body that will be scheduled to concreting waist rail position dig clearly rejects totally, press the calculating of concrete slope protection pile outermost, about 500～600mm.The pile body of both sides slope protection pile and the inter-pile soil body 12 of rejecting are cleaned out.
In the above-mentioned steps 4, predetermined inter-pile soil body of building the waist rail position is dug clearly totally, press concrete slope protection pile outermost and calculate about 500～600mm.By prestressed reinforcement between two parties, height 300mm, slope shape can be cut in top, and the both sides pile body is cleaned out.The prestressed reinforcement that is inserted in PVC sleeve is all eliminated.During prestressed stretch-draw, prestressed anchor institute cement injection should reach stretch-draw intensity.Suitably adjust the waist rail strength grade of concrete, make prestressed anchor and concrete breast beam intensity can satisfy the stretch-draw requirement simultaneously.Top, concrete breast beam position mainly is to consider to build waist rail Concrete Construction needs by the inter-pile soil of 45 ° of excisions.If the soil property situation is good, can suitably reduce to cut the angle of soil, be as the criterion with the construction requirement that satisfies concreting.If inter-pile soil matter is bad, can adds the plank paulin and live unsettled to prevent that the top soil body from falling.
Step 5, with beyond the prestressed anchor grouting port to the one section prestress wire that scribbles sliding agent, is with sleeve pipe in the stake outside, be inserted in the anchor slab 5 in middle band φ 50-70 hole, 12 millimeters thick (150～200) * (150～200), referring to Fig. 7, Fig. 8, the anchor slab permanent position is apart from slope protection pile outside 100mm.Fixedly connected by anchor head 4 between the steel strand of prestressed anchor 3 and the anchor slab 5.
Step 6, at anchor slab outside assembling reinforcement net sheet, arrange the reinforcing bar in the concrete breast beam.Reinforced mesh employing two, grade III steel muscle all can.The single-point stretching force is less than 400KN, and the elongated horizontal bar 6 of reinforced mesh can disconnect, and greater than 400KN, elongated horizontal bar 6 should elongated setting.The installation site of prestressing force anchor slab, up and down in the Ying Ju concrete breast beam, front and back are apart from slope protection pile outer ledge 100mm, the closely connected as far as possible prestressing force anchor slab of elongated vertical muscle 7, but also spot welding is fixed.
Reinforced mesh arrangement of reinforcement situation sees the following form:
Stake footpath (mm) Main muscle The distribution bar spacing The single-point stretching force Remarks
600，800 The long 1000mm of Φ 4-16; Φ12，100mm； 250KN The straight hook of main muscle termination 5d (900)
600，800 The long 1200mm of Φ 4-18; Φ12，100mm； 320KN The straight hook of main muscle termination 5d (900)
600，800 The long 1400mm of Φ 4-20; Φ12，100mm； 400KN The straight hook of main muscle termination 5d (900)
800 The long 1600mm of Φ 4-22; Φ14，100mm； 500KN Main muscle is elongated around stake
800 The long 1800mm of Φ 4-25; Φ14，100mm； 600KN Main muscle is elongated around stake
Referring to Fig. 9, Figure 10, adopt two one anchors, general single-point prestressing force is not more than 400KN.Do not establish between the stake of presstressed reinforcing steel, build with cross section plain concrete waist rail.The termination of the lengthways main steel bar of the separate type reinforced mesh of single-point stretching force≤400KN props up slope protection pile as far as possible, should make 900 straight hooks, and straight portion is not less than 5d.The lengthways main steel bar of the continous way reinforced mesh of single-point stretching force 〉=400KN should be walked around slope protection pile, and the lengthways main steel bar between each connects together, and loses efficacy to prevent anchoring.
When single-point prestressing force greater than 600KN, be not more than 1000KN, except that by the last table 600KN situation arrangement of reinforcement, also should dispose anti-impact and cut sleeper.Referring to Fig. 3, Fig. 4, anti-impact is cut sleeper two both sides symmetric arrangement about anchor slab, and every anti-impact is cut the shearing resistance stirrup that sleeper is joined four Φ 16mm, shearing resistance stirrup and concrete breast beam angle at 45; The bearing rod that four angle points of shearing resistance stirrup are respectively joined a Φ 12mm, bearing rod becomes 22.5 ° of angles with concrete breast beam.
Step 7, the exterior sheathing that installs concrete breast beam and side template, 200 * 200 (mm) hole is opened in the exterior sheathing center, forms box template 11, and the anchor slab that the centre is with holes is fixed in the box template.Middle anchor slab with holes is fixed on the method on the box template: can be around the anchor slab with nail hammer into the box template half, then the head of a nail is pounded the curved anchor slab of pushing down.Hole in the middle of the anchor slab and the slit between the steel strand should be obturaged stifled firm, spillage when preventing concreting.
In the above-mentioned steps 7, above-mentioned concrete breast beam side form utilizes the outside still to do a top at the foundation trench soil of excavation, and the sectional dimension of concrete breast beam is not less than 300 * 500.
Step 8, concreting.Build the C40 concrete, guarantee that the concrete breast beam sectional dimension is not less than 300 * 500.The concrete breast beam side form can utilize the outside still to do a top at the foundation trench soil of excavation.When building concrete, should use vibrating spear to vibrate or insert and smash, guarantee that concreting is closely knit with reinforcing bar, particularly the anchor slab back side and reinforced mesh part must not loosen, gapped.When vibrating, should also be noted that the sleeve pipe that prevents prestressed reinforcement bumps brokenly.During two one anchor constructions, do not have between the stake of prestressed reinforcement, by there being muscle waist rail size to build plain concrete.
Step 9, treat that concrete reaches design strength after, treat that promptly concrete reaches C20 after, remove waist rail side template and box template, under the normal temperature environment, form removal in general 48 hours after the concrete final set, partial prestressing steel strand beyond the cleaning waist rail are installed ground tackle stretch-draw prestressing force steel strand.After the concrete breast beam final set, answer water seasoning; High temperature and low temperature environment should suitably cover, and prevent dehydration or endure cold.Under the normal temperature environment, after concrete is built 3d, can carry out prestressed reinforcement stretch-draw operation.Along with the further growth of waist rail concrete strength, the drag of waist rail and stability also can strengthen gradually.
Step 10, finish concrete breast beam, carry out next step foundation ditch digging.

Claims (5)

  1. [claim 1] a kind of pit pile anchor breast wall concrete breast beam structure, the slope protection pile (1) that in foundation pit side-wall, has a row to be provided with at interval, the position is stretched in inter-pile soil (8) and is fixed with prestressed anchor (3) between the stake of slope protection pile, also be furnished with horizontal waist rail on the foundation pit side-wall, it is characterized in that: above-mentioned waist rail is concrete breast beam (2), this concrete breast beam (2) is positioned between the stake of concrete revetment pile (1), and be connected with prestressed anchor (3) cast, the lateral surface of concrete breast beam (2) is concordant with the pile body crust of concrete revetment pile (1), the medial surface of concrete breast beam is near pile body the inner of concrete revetment pile, concrete breast beam is inner, and punishment is furnished with reinforced mesh near lateral surface, above-mentioned reinforced mesh is coated on the pile body outside of this row's concrete revetment pile (1), and be connected with the anchor slab (5) of prestressed anchor (3) between stake, above-mentioned prestressed anchor (3) is in foundation pit side-wall anchors into inter-pile soil (8), its anchor head (4) is positioned at the inboard of this row's concrete revetment pile (1) outside joint face, that is, do not protrude in foundation pit side-wall.
  2. [claim 2] pit pile anchor breast wall concrete breast beam structure according to claim 1, it is characterized in that: above-mentioned reinforced mesh is formed by elongated horizontal bar (6) and elongated vertical muscle (7) interconnection, and elongated horizontal bar (6) is walked around concrete revetment pile (1), is positioned at the anchor slab inboard.
  3. [claim 3] pit pile anchor breast wall concrete breast beam structure according to claim 1 and 2, it is characterized in that: above-mentioned concrete breast beam (2) is at anchor slab the right and left symmetrical distribution bearing rod (10) and shearing resistance stirrup (9), described bearing rod (10) has four, be positioned at four edges of shearing resistance stirrup (9), above-mentioned shearing resistance stirrup (9) and the vertical angle at 45 of waist rail, bearing rod (10) vertically becomes 22.5 ° of angles with waist rail.
  4. [claim 4] pit pile anchor breast wall concrete breast beam structure according to claim 1 and 2 is characterized in that: above-mentioned prestressed anchor (3) is prestressing force steel hinge line, solid anchor pole, hollow self-feeding anchor pile, hollow expansion type rock bolt or hollow grouting anchor.
  5. [claim 5] pit pile anchor breast wall concrete breast beam structure according to claim 1 and 2 is characterized in that: above-mentioned slope protection pile is reinforced concrete revetment pile, immersed tube bored slope protection pile, stirring slope protection pile, borehole slope protection pile or mechanical hole building slope protection pile.
CNU2008203010753U 2008-06-10 2008-06-10 Pit anchored pile-anchor breast wall concrete middle beam structure Expired - Fee Related CN201228356Y (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101906780A (en) * 2010-07-12 2010-12-08 中铁四局集团第五工程有限公司 Method for protecting and reinforcing anchor rope of steel pipe pile
CN102162251A (en) * 2011-03-03 2011-08-24 天津华悦土木工程质量检测有限公司 Installation method of support middle beam in foundation pit of section steel cement-soil wall
CN102409682A (en) * 2011-11-25 2012-04-11 北京市第三建筑工程有限公司 Pre-stressed anchor rod type steel internal support structure of continuous arched slope protection piles and construction method of pre-stressed anchor rod type steel internal support structure
CN103147443A (en) * 2013-03-18 2013-06-12 中国建筑第八工程局有限公司 Foundation pit supporting structure and construction method thereof
CN104652447A (en) * 2014-11-14 2015-05-27 北京地圣科创建设工程有限公司 Temporary prestressed waist beam capable of continuously applying counterforce for surface plate
CN108487255A (en) * 2018-02-02 2018-09-04 江苏工程职业技术学院 Modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method
CN115182360A (en) * 2022-08-04 2022-10-14 中建八局第二建设有限公司 Pile anchor waist beam supporting structure and supporting method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101906780A (en) * 2010-07-12 2010-12-08 中铁四局集团第五工程有限公司 Method for protecting and reinforcing anchor rope of steel pipe pile
CN102162251A (en) * 2011-03-03 2011-08-24 天津华悦土木工程质量检测有限公司 Installation method of support middle beam in foundation pit of section steel cement-soil wall
CN102162251B (en) * 2011-03-03 2012-07-25 天津华悦土木工程质量检测有限公司 Installation method of support middle beam in foundation pit of section steel cement-soil wall
CN102409682A (en) * 2011-11-25 2012-04-11 北京市第三建筑工程有限公司 Pre-stressed anchor rod type steel internal support structure of continuous arched slope protection piles and construction method of pre-stressed anchor rod type steel internal support structure
CN103147443A (en) * 2013-03-18 2013-06-12 中国建筑第八工程局有限公司 Foundation pit supporting structure and construction method thereof
CN103147443B (en) * 2013-03-18 2015-08-05 中国建筑第八工程局有限公司 Foundation pit supporting construction and construction method thereof
CN104652447A (en) * 2014-11-14 2015-05-27 北京地圣科创建设工程有限公司 Temporary prestressed waist beam capable of continuously applying counterforce for surface plate
CN108487255A (en) * 2018-02-02 2018-09-04 江苏工程职业技术学院 Modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method
CN108487255B (en) * 2018-02-02 2019-11-26 江苏工程职业技术学院 Modified H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method
CN115182360A (en) * 2022-08-04 2022-10-14 中建八局第二建设有限公司 Pile anchor waist beam supporting structure and supporting method
CN115182360B (en) * 2022-08-04 2023-08-18 中建八局第二建设有限公司 Pile anchor waist beam supporting structure and supporting method

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Granted publication date: 20090429

Termination date: 20140610