CN107059882A - Arch anchor net and Anchor-Pile Retaining Structure structure - Google Patents

Arch anchor net and Anchor-Pile Retaining Structure structure Download PDF

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Publication number
CN107059882A
CN107059882A CN201710249474.3A CN201710249474A CN107059882A CN 107059882 A CN107059882 A CN 107059882A CN 201710249474 A CN201710249474 A CN 201710249474A CN 107059882 A CN107059882 A CN 107059882A
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CN
China
Prior art keywords
anchor
pile
baffle plate
soil
arch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710249474.3A
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Chinese (zh)
Inventor
武崇福
刘淑宏
黄健
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Yanshan University
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Yanshan University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yanshan University filed Critical Yanshan University
Priority to CN201710249474.3A priority Critical patent/CN107059882A/en
Publication of CN107059882A publication Critical patent/CN107059882A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits

Abstract

The invention discloses a kind of arch anchor net and Anchor-Pile Retaining Structure structure, it is arranged on foundation pit side-wall, the structure includes vertically being fixed on several support piles at bottom in foundation ditch, the waist rail being connected between the support pile described in adjacent at least two and the arched baffle plate being connected between the support pile described in adjacent two, being extended through described arched baffle plate into the foundation pit side-wall soil body has several soil nailings, and being extended through described waist rail and described support pile into the foundation pit side-wall soil body has several prestressed anchors.The beneficial effect of the structure:(a) it is linked to be entirety by setting up arched baffle plate and support pile, adds lateral rigidity, reduces support pile deformation and quantity of reinforcement;(b) soil nailing is set up in arched baffle plate, support pile stress is reduced, so as to reduce rock-bolt length;(c) arched baffle plate and earth-retaining and water retaining function, change the deficiency that traditional pile-anchor supporting system is present.

Description

Arch anchor net and Anchor-Pile Retaining Structure structure
Technical field
The present invention relates to foundation pit supporting system, more particularly to a kind of arch anchor net and Anchor-Pile Retaining Structure structure.
Background technology
Foundation ditch refer in order to build the basis of building (including structures) and basement, embedded municipal works pipeline and The space for the below ground that the exploitation underground space (such as underground station, market etc.) is excavated.Pattern foundation pit supporting structure refers to under protecting field The safety of structure and foundation ditch surrounding enviroment, the supporting and retaining system that foundation pit side-wall and surrounding enviroment are taken, reinforce and protection etc. engineering arrange Apply.
The fundamental type of the supporting construction of base pit engineering has:Slope is excavated and simple protection, cantilever supporting structure, cement Native piling wall supporting construction, Internal-shoring Supporting structure, piled anchor formula supporting construction, soil nailed wall retaining structure, contrary sequence method and other branch Protection structure.In these foundation pit supporting constructions, anchored pile supporting be through frequently with a kind of supporting construction, and held It is continuous to be widely applied.
Anchored pile supporting from deposited reinforced concrete pile and level to or oblique prestressed anchor constitute, pile-anchor retaining Structure can be divided into single fulcrum pile_anchor retaining structure and many fulcrum piled anchor branch according to cutting depth and foundation ditch surrounding environment of foundation ditch etc. Protection structure.Prestressed anchor is made up of free segment and anchoring section, and the prestressing force that anchor pole applies is by the anchor rod anchored section of anchoring provided Power undertakes.
In Excavation Process, due to the effect of soil mass of foundation pit pressure, support pile pile body is in by curved state, and anchor pole is in Tension state.Because anchor pole provides support force to pile body, pile body internal force distribution under horizontal earth pressure effect is set to tend to be uniform, It is reasonable when pile body stress is compared with cantilever position.The anchor rod prestress being previously applied, makes anchored pile supporting in Excavation Process, Crater wall horizontal displacement is controlled effectively, stability against overturning is greatly improved, and the building-in depth of pile body is obtained significantly Shorten, difficulty of construction and construction investment are significantly reduced.Therefore anchored pile supporting is commonly used as in engineering practice Supporting construction form, be widely used in support engineering.
But there are following two big shortcomings in existing technology:(1) campshed lateral rigidity is small, and under soil pressure effect, span centre is attached Larger moment of flexure would generally closely be produced, it may occur that than larger flexural deformation so that the diameter and Reinforcement Design of bored concrete pile are larger; (2) when foundation depth is larger or during poor soil condition, the prestressing force that anchor pole is provided is generally higher, now needs larger anchoring Length, and foundation ditch surrounding environment is poor under normal circumstances, city geological environment is more complicated, and level of ground water is higher, and hole is outer Workable space is smaller, and these just bring very big limitation to the application of anchored pile supporting, also to anchored pile supporting Design and construction bring extreme difficulties.
The content of the invention
The embodiment of the present invention provides a kind of arch anchor net and Anchor-Pile Retaining Structure structure, and intensity is high, and has earth-retaining and gear concurrently The function of water, easily implements.
Arch anchor net and Anchor-Pile Retaining Structure structure, are arranged on foundation pit side-wall, and the structure includes vertically being fixed on Several support piles at bottom, the waist rail being connected between the support pile described in adjacent at least two and it is connected to adjacent in foundation ditch Two described in support pile between arched baffle plate, through described arched baffle plate into the foundation pit side-wall soil body be extended have Several soil nailings, being extended through described waist rail and described support pile into the foundation pit side-wall soil body has several prestressing force Anchor pole.
Preferably, described arched baffle plate is in arc-shaped arch.
Preferably, described waist rail, described soil nailing and described prestressed anchor are steel structure.
Preferably, described support pile and described arched baffle plate are concrete structure.
Preferably, described prestressed anchor tilts down setting.
Preferably, described waist rail is multiple including what is be arranged in parallel up and down.
The beneficial effect of the supporting construction of the present invention:(a) it is linked to be entirety by setting up arched baffle plate and support pile, adds Lateral rigidity, reduces support pile deformation and quantity of reinforcement;(b) soil nailing is set up in arched baffle plate, support pile stress is reduced, so that Reduce rock-bolt length;(c) arched baffle plate and earth-retaining and water retaining function, change the deficiency that traditional pile-anchor supporting system is present.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is that (soil body is saturating for the structural representation of arch anchor net provided in an embodiment of the present invention and Anchor-Pile Retaining Structure structure Express meaning);
Fig. 2 is that (soil body is transparent to be shown for the top view of arch anchor net provided in an embodiment of the present invention and Anchor-Pile Retaining Structure structure Meaning);
Fig. 3 is arch anchor net provided in an embodiment of the present invention and the force diagram one of Anchor-Pile Retaining Structure structure;
Fig. 4 is arch anchor net provided in an embodiment of the present invention and the force diagram two of Anchor-Pile Retaining Structure structure.
Description of reference numerals:
1- support piles, 2- waist rails, 3- arched baffle plates, 4- soil nailings, 5- prestressed anchors;
The A- soil bodys are to the active force of supporting construction, the pulling force of B- prestressed anchors;The pulling force of C- soil nailings.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
As shown in Figures 1 and 2, a kind of arch anchor net and Anchor-Pile Retaining Structure structure, are arranged on foundation pit side-wall, the structure bag Include vertically be fixed on several support piles 1 at bottom in foundation ditch, be connected to support pile 1 described in adjacent at least two it Between waist rail 2 and the arched baffle plate 3 that is connected between the support pile 1 described in adjacent two, through described arched baffle plate 3 to Being extended in the foundation pit side-wall soil body has several soil nailings 4, through described waist rail 2 and described support pile 1 to foundation pit side-wall Being extended in the soil body has several prestressed anchors 5, and described arched baffle plate 3 is in arc-shaped arch, wherein, prestressed anchor 5 include the free segment and the anchoring section that is connected with the free segment close to support pile 1, described waist rail 2, described soil nailing 4 and Described prestressed anchor 5 is steel structure, and described support pile 1 and described arched baffle plate 3 are concrete structure, institute The prestressed anchor 5 stated tilts down setting, and described waist rail 2 is multiple including what is be arranged in parallel up and down.
As shown in Figure 3 and Figure 4, the soil body of foundation pit side-wall to the active force A of whole supporting construction by prestressed anchor 5 Pulling force B horizontal direction component and the pulling force C of soil nailing 4 horizontal direction component is balanced, and then ensures that total is not caved in, Ensure construction safety.
In the supporting construction:(1) support pile 1 plays retaining wall, bears the horizontal pressure force that the foundation pit side-wall soil body is transmitted; (2) formation of arched baffle plate 3 space stiffness, entirety is formed with support pile 1, reduces support system horizontal distortion;(3) prestressed anchor 5 points are free segment and anchoring section, play a part of to socket support pile 1, while reducing stake horizontal distortion;(4) soil nailing 4 is anchored at the soil body In, serve and socket arched baffle plate 3;(5) waist rail 2 fixes prestressed anchor 5, while forming entirety with support pile 1, plays collar tie beam Effect.
The supporting construction of the present invention is tested through lab and field, is as a result shown:(a) set arch anchor net can between stake To be collectively forming continuous soil-baffling structure with pile body, the native displacement of limitation stake is played a part of in rigidity of structure increase more than 30%;Stake It is more or less the same afterwards with arch bar soil pressure force value, and distribution form is substantially similar, soil of the maximum than being not provided with during arch anchor net Pressure maximum value is small, illustrates that arch anchor net plays corrective action to soil pressure, the deformation of such stake and quantity of reinforcement ratio do not set arch The stake of shape baffle plate is small;(b) soil nailing is set up in arched baffle plate, 20%-30% soil pressures has been shared, has reduced and act on support pile Upper pressure, so as to reduce rock-bolt length;(c) integral structural system of support pile very directly perceived and arched baffle plate formation, with compared with Good earth-retaining and water retaining function, good operating condition is provided to construction foundation working.
To sum up, the supporting construction of the design can reach following technique effect:(a) by setting up arched baffle plate and support pile It is linked to be entirety, adds lateral rigidity, reduces support pile deformation and quantity of reinforcement;(b) soil nailing is set up in arched baffle plate, is reduced Support pile stress, so as to reduce rock-bolt length;(c) arched baffle plate and earth-retaining and water retaining function, change traditional pile-anchor retaining The deficiency that system is present.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprising including these changes and modification.

Claims (6)

1. arch anchor net and Anchor-Pile Retaining Structure structure, are arranged on foundation pit side-wall, it is characterised in that the structure is included along vertical side To being fixed on several support piles at bottom in foundation ditch, the waist rail and the company that are connected between the support pile described in adjacent at least two The arched baffle plate between the support pile described in adjacent two is connected on, is prolonged through described arched baffle plate into the foundation pit side-wall soil body Stretch and be provided with several soil nailings, being extended through described waist rail and described support pile into the foundation pit side-wall soil body has some Individual prestressed anchor.
2. arch anchor net as claimed in claim 1 and Anchor-Pile Retaining Structure structure, it is characterised in that described arched baffle plate is in Arc-shaped arch.
3. arch anchor net as claimed in claim 1 and Anchor-Pile Retaining Structure structure, it is characterised in that described waist rail, described Soil nailing and described prestressed anchor be steel structure.
4. arch anchor net as claimed in claim 1 and Anchor-Pile Retaining Structure structure, it is characterised in that described support pile and institute The arched baffle plate stated is concrete structure.
5. arch anchor net as claimed in claim 1 and Anchor-Pile Retaining Structure structure, it is characterised in that described prestressed anchor Tilt down setting.
6. arch anchor net as claimed in claim 1 and Anchor-Pile Retaining Structure structure, it is characterised in that described waist rail includes upper Under be arranged in parallel it is multiple.
CN201710249474.3A 2017-04-17 2017-04-17 Arch anchor net and Anchor-Pile Retaining Structure structure Pending CN107059882A (en)

Priority Applications (1)

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CN201710249474.3A CN107059882A (en) 2017-04-17 2017-04-17 Arch anchor net and Anchor-Pile Retaining Structure structure

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Application Number Priority Date Filing Date Title
CN201710249474.3A CN107059882A (en) 2017-04-17 2017-04-17 Arch anchor net and Anchor-Pile Retaining Structure structure

Publications (1)

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CN107059882A true CN107059882A (en) 2017-08-18

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108222017A (en) * 2018-02-02 2018-06-29 江苏工程职业技术学院 A kind of H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method
CN109235447A (en) * 2018-10-11 2019-01-18 安徽省城建设计研究总院股份有限公司 A kind of horizontal arch shell foundation pit support device
CN110055974A (en) * 2019-04-24 2019-07-26 兰州理工大学 A kind of recyclable miniature steel pipe pile soil nailing combined support structure and its recovery method
CN110206042A (en) * 2019-06-18 2019-09-06 深圳市中天基础勘测设计有限公司 A kind of foundation pit of network column supporting
CN109505229B (en) * 2018-12-13 2021-02-23 中交一公局桥隧工程有限公司 Stress balance and vibration-damping disaster-prevention high pier structure for high and steep side slope of highway and construction method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3215153A1 (en) * 1982-04-23 1983-11-03 Beratende Ingenieure Vbi Frank Retaining structure and method of producing a retaining structure
CN204825923U (en) * 2015-07-29 2015-12-02 中国航天建设集团有限公司 Relay formula underground structure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3215153A1 (en) * 1982-04-23 1983-11-03 Beratende Ingenieure Vbi Frank Retaining structure and method of producing a retaining structure
CN204825923U (en) * 2015-07-29 2015-12-02 中国航天建设集团有限公司 Relay formula underground structure

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
谢强等: "《岩体力学与工程》", 31 July 2011, 西南交通大学出版社 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108222017A (en) * 2018-02-02 2018-06-29 江苏工程职业技术学院 A kind of H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method
CN108222017B (en) * 2018-02-02 2019-11-26 江苏工程职业技术学院 A kind of H profile steel anchor pole composite pile-prefabricated board wall base pit enclosure construction method
CN109235447A (en) * 2018-10-11 2019-01-18 安徽省城建设计研究总院股份有限公司 A kind of horizontal arch shell foundation pit support device
CN109505229B (en) * 2018-12-13 2021-02-23 中交一公局桥隧工程有限公司 Stress balance and vibration-damping disaster-prevention high pier structure for high and steep side slope of highway and construction method
CN110055974A (en) * 2019-04-24 2019-07-26 兰州理工大学 A kind of recyclable miniature steel pipe pile soil nailing combined support structure and its recovery method
CN110206042A (en) * 2019-06-18 2019-09-06 深圳市中天基础勘测设计有限公司 A kind of foundation pit of network column supporting

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Application publication date: 20170818