CN102251524A - Foundation pit side wall prestressed anchor rod spreader beam row pile enclosing structure - Google Patents
Foundation pit side wall prestressed anchor rod spreader beam row pile enclosing structure Download PDFInfo
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- CN102251524A CN102251524A CN2011101037461A CN201110103746A CN102251524A CN 102251524 A CN102251524 A CN 102251524A CN 2011101037461 A CN2011101037461 A CN 2011101037461A CN 201110103746 A CN201110103746 A CN 201110103746A CN 102251524 A CN102251524 A CN 102251524A
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Abstract
The invention discloses a foundation pit side wall prestressed anchor rod spreader beam row pile enclosing structure and relates to the foundation pit side wall row pile enclosing structure. The invention aims at solving the problems that the using quantity of enclosing row pile material is large in the existing foundation pit side wall row pile enclosing structure, as well as inconvenience in mounting, incapability of realizing flexible arrangement, easy occurrence of quality problem and the like because steel plate wedge block needs to be used for padding when a horizontal continuous beam is adopted. The row pile enclosing structure comprises a plurality of anchor device connecting parts and a plurality of sectional type spreader beams, each sectional type spreader beam firmly leans against two adjacent row piles through at least one anchor device connecting part and the plurality of the sectional type spreader beams are arranged from top to bottom along the height direction of pile bodies. In comparison with the general continuous beam, the sectional type spreader beams have the advantages that section steel can be saved by 20-35%, as the sectional type spreader beams can lean against the row piles firmly, the support requirements of a computation module can be completely met, the support failure is not additionally reckoned in due to a mounting clearance and the using quantity of the enclosing row pile material can be reduced. The sectional type spreader beams can be flexibly arranged so that the foundation pit side wall enclosing becomes safe and reliable.
Description
Technical field
The present invention relates to a kind of foundation pit side-wall campshed space enclosing structure.
Background technology
General underground construction and excavation surpasses 5 meters when dark, and foundation pit side-wall is gone along with sb. to guard him to need to adopt and is pressed into shaped steel stake (I-shaped) or bored pile.No matter use any class campshed, all must several common horizontal continuous beam be set from top to bottom, recline and prop up campshed, and be bearing, form deep-foundation side wall space enclosing structure system with the prestressed anchor along pile body short transverse (being the foundation depth direction).And be pressed into or pierce nearly 20 meters long stakes the soil from ground, and its pile body verticality, it is very big to be pressed into a displacement error, to steel reinforced concrete stake relative displacement difference 30～300mm, stake reaches 10～150mm to shaped steel, and every pile is come and gone along the foundation pit side-wall plane, far exceeds structural analysis distortion supposition.When elongated horizontal coupling beam reclines campshed, (reach hundreds of to several thousand) by point, big space (＞20mm) with steel plate voussoir padding, little space then when anchor pole applies prestressing force press-bending steel coupling beam force to abut on the pile body.Still have part to recline and a little leave 3～20mm space, cause the computation model distortion, quality problems occur.Then bigger for the steel reinforced concrete campshed by the some space.Go along with sb. to guard him in the campshed design and construction because of taking above-mentioned existing problems into account, existing solution is: increase anchor pole consumption (reduce spacing, increase row's number) or increasing fender pile cross dimensions and rolled steel dosage.Can cause the provisional structure of establishing temporarily of construction period like this, the material therefor consumption is suitable with this building foundation engineering, causes bigger waste, and it is not good to go along with sb. to guard him effect yet.
Summary of the invention
The present invention exists in order to solve existing foundation pit side-wall campshed space enclosing structure that to go along with sb. to guard him campshed material (horizontal continuous beam) consumption big; And the horizontal continuous beam of employing need be not easy to install, can't realize flexible arrangement with steel plate voussoir padding, is prone to problems such as quality, and then a kind of foundation pit side-wall prestressed anchor spreader beam campshed space enclosing structure is provided.
The present invention solves the problems of the technologies described above the technical scheme of taking to be:
Foundation pit side-wall prestressed anchor spreader beam campshed space enclosing structure of the present invention comprises a plurality of ground tackle connectors and a plurality of segmented spreader beam, each segmented spreader beam firmly abuts on (load exists) adjacent two campsheds by at least one ground tackle connector, and described a plurality of segmented spreader beams from top to bottom are provided with along the pile body short transverse.
The invention has the beneficial effects as follows:
Campshed space enclosing structure of the present invention is arranged existing campshed along foundation depth elongated continuous type girder steel changes over segmented (shaped steel) spreader beam that is provided with at interval by pilespacing, solved because of adopting elongated continuous type girder steel to turn round and look to exist the big and horizontal continuous beam of employing of rolled steel dosage to be not easy to install, can't realize flexible arrangement, be prone to problems such as quality with steel plate voussoir padding.
The segmentation spreader beam can be saved structural section 20～35% than elongated continuous beam.Owing to can closely abut on the campshed, meet computation model fully and support requirement, or not can not accomplish to reduce the material usage of going along with sb. to guard him campshed count the support inefficacy in addition because of fixing clearance.The shaped steel spreader beam is in light weight, and (50kg～100kg) is convenient to artificial installation, accelerating construction progress can change and the bad variation situation of foundation pit side-wall soil layer according to the construction plant condition, moves flexibly and arranges, help regulating and control campshed soil body distribution of internal force, can guarantee really that foundation pit side-wall goes along with sb. to guard him quality.That the present invention also has is safe and reliable, save cost, the advantage of reduction of erection time.
Description of drawings
Fig. 1 is that the master of foundation pit side-wall prestressed anchor spreader beam campshed space enclosing structure of the present invention looks schematic diagram (the space enclosing structure form is " two one load one anchors "), Fig. 2 is that the master of foundation pit side-wall prestressed anchor spreader beam campshed space enclosing structure of the present invention looks schematic diagram (the space enclosing structure form is " two the one two anchors of load "), Fig. 3 is that the master of foundation pit side-wall prestressed anchor spreader beam campshed space enclosing structure of the present invention looks schematic diagram (the space enclosing structure form is " two one loads; one one anchor "), Fig. 4 a is that (campshed is a bored pile for the schematic top plan view of foundation pit side-wall prestressed anchor spreader beam campshed space enclosing structure of the present invention, the space enclosing structure form is " two one load one anchors "), Fig. 4 b is that (campshed is the shaped steel stake for the schematic top plan view of foundation pit side-wall prestressed anchor spreader beam campshed space enclosing structure of the present invention, the space enclosing structure form is " two one load one anchors "), Fig. 5 is the schematic top plan view (the space enclosing structure form is " two the one two anchors of load ") of foundation pit side-wall prestressed anchor spreader beam campshed space enclosing structure of the present invention, Fig. 6 is the schematic top plan view (the space enclosing structure form is " two one loads; one one anchor ") of foundation pit side-wall prestressed anchor spreader beam campshed space enclosing structure of the present invention, Fig. 7 is Fig. 4 a, Fig. 4 b, the A-A sectional view of Fig. 5 or Fig. 6, Fig. 8 are the outline drawings of the wedge-shaped steel plate among Fig. 7.
The specific embodiment
The specific embodiment one: shown in Fig. 1～7, the described foundation pit side-wall prestressed anchor of present embodiment spreader beam campshed space enclosing structure comprises a plurality of ground tackle connectors and a plurality of segmented spreader beam 1, each segmented spreader beam 1 firmly abuts on (load exists) adjacent two campsheds 4 by at least one ground tackle connector, and described a plurality of segmented spreader beams 1 from top to bottom are provided with along the pile body short transverse.
The specific embodiment two: shown in Fig. 1～7, the described segmented spreader beam 1 of present embodiment is the shaped steel spreader beam, each segmented spreader beam 1 comprises two channel-section steel 1-1, at least two batten plate 1-2 and at least one pair of wedge-shaped steel plate 1-3, two opposing at least two batten plate 1-2 that be arranged in parallel and be provided with by dispersion of channel-section steel 1-1 weld together, and at least one pair of wedge-shaped steel plate 1-3 is welded on the lateral surface of opposing two channel-section steel 1-1 that be arranged in parallel.The thickness of wedge-shaped steel plate 1-3 can adopt 10mm～20mm.A pair of wedge-shaped steel plate 1-3 and the two-sided welding of shaped steel spreader beam.Other composition and annexation are identical with the specific embodiment one.
The beam section of the described segmented spreader beam of present embodiment connects to form i shaped steel by the double joint channel-section steel, model scope 2[20a, 2[22a, 2[25a, the 2[28a of selecting commonly used.
The specific embodiment three: shown in Fig. 1～7, each ground tackle connector comprises prestressed anchor 2 and ground tackle 3 in the present embodiment, the anchor pole end of prestressed anchor 2 is fixed in the foundation pit side-wall soil body, the prestressed strand 2-1 of prestressed anchor 2 passes gap between adjacent two campsheds 4 and segmented spreader beam 1 by ground tackle 3 tightenings, correspondingly between each ground tackle 3 and the segmented spreader beam 1 is provided with a pair of wedge-shaped steel plate 1-3.The channel-section steel arris forbids to cough up the steel bundle, promptly leaves certain clearance between prestressed strand 2-1 and the channel-section steel arris.Other composition and annexation are identical with the specific embodiment two.
The specific embodiment four: shown in Fig. 1, Fig. 4 a, Fig. 4 b, a segmented spreader beam 1 firmly abuts on adjacent two campsheds 4 by a ground tackle connector in the present embodiment, and a described ground tackle connector is between adjacent two campsheds 4.This kind arrangement is applicable to that pilespacing is the paxilla distance of 1.5D～2.0D or 2h～3h, is called " two one load one anchors ".In other words, be that (as Fig. 4 a), D represents a diameter in 1.5D～2.0D employing " two one load one anchors " when campshed adopts bored pile and pilespacing; When campshed adopts shaped steel stake and pilespacing is that 2h～3h also adopts " two one load one anchors " (as Fig. 4 b), and h represents the depth of section of I-section steel pile.Other composition and annexation are identical with the specific embodiment one, two or three.
The specific embodiment five: as Fig. 2 and shown in Figure 5, a segmented spreader beam 1 firmly abuts on adjacent two campsheds 4 by two ground tackle connectors in the present embodiment, and described two ground tackle connectors are between adjacent two campsheds 4.This kind arrangement is applicable to that (3.0D～5.0D), D represents the stake diameter of bored pile to big pilespacing; Be called " two the one two anchors of load ".Note guaranteeing anchor pole level interval 〉=900mm.Other composition and annexation are identical with the specific embodiment one, two or three.
The specific embodiment six: as Fig. 3 and shown in Figure 6, a segmented spreader beam 1 firmly abuts on adjacent two campsheds 4 by two ground tackle connectors in the present embodiment, and described two ground tackle connectors and adjacent two campsheds, 4 alternate settings.This kind arrangement is applicable between the big or small pilespacing, is called " two one loads, one one anchor ", notices in the design that spreader beam two ends anchor pole power does not wait, and should complementaryly adjust.Other composition and annexation are identical with the specific embodiment one, two or three.
Be pressed into or pierce the soil nearly 20 meters long of campshed from ground, go into point location owing to press (brill), factor affecting such as pile body verticality make each pile spacing scale error bigger, so according to actual conditions, three kinds of arrangements in the above-mentioned specific embodiment four to six can adopt and be used in combination in twos or three kinds of uses simultaneously.
The constructing operation process of campshed space enclosing structure: press basement bottom board working face outer contour earlier, be pressed into I-section steel pile or the stake of drill-pouring steel reinforced concrete.Can measure campshed spacing dimension profile steel crossarm beam again during excavation, anchor pole arranges and selects Fig. 4 a, 4b that the corresponded manner among Fig. 5 or Fig. 6 is with digging with mount type steel crossarm beam.The shaped steel spreader beam can be in advance processing and fabricating in batch, be transported to the scene and also can directly process at the construction field (site).After treating that basement engineering is finished, when carrying out the foundation pit side-wall backfill, removable mo(u)ld bottom half steel crossarm beam recycling.
Claims (6)
1. foundation pit side-wall prestressed anchor spreader beam campshed space enclosing structure, described campshed space enclosing structure comprises a plurality of ground tackle connectors, it is characterized in that: described campshed space enclosing structure also comprises a plurality of segmented spreader beams (1), each segmented spreader beam (1) firmly abuts on adjacent two campsheds (4) by at least one ground tackle connector, and described a plurality of segmented spreader beams (1) from top to bottom are provided with along the pile body short transverse.
2. foundation pit side-wall prestressed anchor spreader beam campshed space enclosing structure according to claim 1, it is characterized in that: described segmented spreader beam (1) is the shaped steel spreader beam, each segmented spreader beam (1) comprises two channel-section steels (1-1), at least two batten plates (1-2) and at least one pair of wedge-shaped steel plate (1-3), opposing at least two batten plates (1-2) that be arranged in parallel and be provided with by dispersion of two channel-section steels (1-1) weld together, and at least one pair of wedge-shaped steel plate (1-3) is welded on the lateral surface of opposing two channel-section steels (1-1) that be arranged in parallel.
3. foundation pit side-wall prestressed anchor spreader beam campshed space enclosing structure according to claim 2, it is characterized in that: each ground tackle connector comprises prestressed anchor (2) and ground tackle (3), the anchor pole end of prestressed anchor (2) is fixed in the foundation pit side-wall soil body, gap and segmented spreader beam (1) that the prestressed strand (2-1) of prestressed anchor (2) passes between adjacent two campsheds (4) pass through ground tackle (3) tightening, the corresponding a pair of wedge-shaped steel plate (1-3) that is provided with between each ground tackle (3) and the segmented spreader beam (1).
4. according to claim 1,2 or 3 described foundation pit side-wall prestressed anchor spreader beam campshed space enclosing structures, it is characterized in that: a segmented spreader beam (1) firmly abuts on adjacent two campsheds (4) by a ground tackle connector, and a described ground tackle connector is positioned between adjacent two campsheds (4).
5. according to claim 1,2 or 3 described foundation pit side-wall prestressed anchor spreader beam campshed space enclosing structures, it is characterized in that: a segmented spreader beam (1) firmly abuts on adjacent two campsheds (4) by two ground tackle connectors, and described two ground tackle connectors are positioned between adjacent two campsheds (4).
6. according to claim 1,2 or 3 described foundation pit side-wall prestressed anchor spreader beam campshed space enclosing structures, it is characterized in that: a segmented spreader beam (1) firmly abuts on adjacent two campsheds (4) by two ground tackle connectors, and described two ground tackle connectors and the alternate setting of adjacent two campsheds (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101037461A CN102251524A (en) | 2011-04-25 | 2011-04-25 | Foundation pit side wall prestressed anchor rod spreader beam row pile enclosing structure |
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| CN2011101037461A CN102251524A (en) | 2011-04-25 | 2011-04-25 | Foundation pit side wall prestressed anchor rod spreader beam row pile enclosing structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839673A (en) * | 2012-09-19 | 2012-12-26 | 白福波 | Design method of side wall depth of foundation pit |
| CN103015429A (en) * | 2012-12-04 | 2013-04-03 | 北京建材地质工程公司 | Long auger rotary-jet mixing steel reinforced cement-soil pile foundation pit water-resisting and supporting method |
| CN103046557A (en) * | 2012-12-04 | 2013-04-17 | 北京建材地质工程公司 | Foundation pit water-sealing supporting method by using long spiral cement soil mixing structural steel pile |
| CN103195068A (en) * | 2013-04-03 | 2013-07-10 | 哈尔滨工业大学 | Method for determining foundation pit excavation depths through rock and soil constitutive broken lines |
| CN108457278A (en) * | 2017-02-22 | 2018-08-28 | 中国二十冶集团有限公司 | The support pile anchor cable construction method of narrow spacing |
| CN108999199A (en) * | 2018-10-12 | 2018-12-14 | 深圳市工勘岩土集团有限公司 | Combined type foundation pit supporting method |
| CN111270679A (en) * | 2020-03-18 | 2020-06-12 | 长江勘测规划设计研究有限责任公司 | Construction method and structure of foundation pit fender pile opening excavation processing structure |
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| CN1134489A (en) * | 1996-01-23 | 1996-10-30 | 冶金工业部建筑研究总院 | Anchoring method for prestressed anchor line wall-protecting pile without waist beam |
| CN1851150A (en) * | 2006-05-10 | 2006-10-25 | 大连理工大学 | Concrete combined cushion wedge for supporting waist beam for pile anchoring system, and its constrection method |
| CN101220594A (en) * | 2007-11-30 | 2008-07-16 | 苏州二建建筑集团有限公司 | Building foundation pit supporting construction |
| CN201250407Y (en) * | 2008-07-22 | 2009-06-03 | 北京市地质工程设计研究院 | Embedded steel wale |
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- 2011-04-25 CN CN2011101037461A patent/CN102251524A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1134489A (en) * | 1996-01-23 | 1996-10-30 | 冶金工业部建筑研究总院 | Anchoring method for prestressed anchor line wall-protecting pile without waist beam |
| CN1851150A (en) * | 2006-05-10 | 2006-10-25 | 大连理工大学 | Concrete combined cushion wedge for supporting waist beam for pile anchoring system, and its constrection method |
| CN101220594A (en) * | 2007-11-30 | 2008-07-16 | 苏州二建建筑集团有限公司 | Building foundation pit supporting construction |
| CN201250407Y (en) * | 2008-07-22 | 2009-06-03 | 北京市地质工程设计研究院 | Embedded steel wale |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102839673A (en) * | 2012-09-19 | 2012-12-26 | 白福波 | Design method of side wall depth of foundation pit |
| CN102839673B (en) * | 2012-09-19 | 2014-10-15 | 白福波 | Design method of side wall depth of foundation pit |
| CN103015429A (en) * | 2012-12-04 | 2013-04-03 | 北京建材地质工程公司 | Long auger rotary-jet mixing steel reinforced cement-soil pile foundation pit water-resisting and supporting method |
| CN103046557A (en) * | 2012-12-04 | 2013-04-17 | 北京建材地质工程公司 | Foundation pit water-sealing supporting method by using long spiral cement soil mixing structural steel pile |
| CN103195068A (en) * | 2013-04-03 | 2013-07-10 | 哈尔滨工业大学 | Method for determining foundation pit excavation depths through rock and soil constitutive broken lines |
| CN103195068B (en) * | 2013-04-03 | 2015-05-13 | 哈尔滨工业大学 | Method for determining foundation pit excavation depths through rock and soil constitutive broken lines |
| CN108457278A (en) * | 2017-02-22 | 2018-08-28 | 中国二十冶集团有限公司 | The support pile anchor cable construction method of narrow spacing |
| CN108999199A (en) * | 2018-10-12 | 2018-12-14 | 深圳市工勘岩土集团有限公司 | Combined type foundation pit supporting method |
| CN111270679A (en) * | 2020-03-18 | 2020-06-12 | 长江勘测规划设计研究有限责任公司 | Construction method and structure of foundation pit fender pile opening excavation processing structure |
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