WO2021068262A1 - Élément de renforcement de fondation meuble de forme réglable à base d'arche de sol artificiel - Google Patents

Élément de renforcement de fondation meuble de forme réglable à base d'arche de sol artificiel Download PDF

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Publication number
WO2021068262A1
WO2021068262A1 PCT/CN2019/110884 CN2019110884W WO2021068262A1 WO 2021068262 A1 WO2021068262 A1 WO 2021068262A1 CN 2019110884 W CN2019110884 W CN 2019110884W WO 2021068262 A1 WO2021068262 A1 WO 2021068262A1
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WO
WIPO (PCT)
Prior art keywords
belt
base
geobag
belts
lifting
Prior art date
Application number
PCT/CN2019/110884
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English (en)
Chinese (zh)
Inventor
孙优生
王泽宇
吴丹丹
Original Assignee
南京森淼环保科技有限公司
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.)
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Application filed by 南京森淼环保科技有限公司 filed Critical 南京森淼环保科技有限公司
Priority to PCT/CN2019/110884 priority Critical patent/WO2021068262A1/fr
Publication of WO2021068262A1 publication Critical patent/WO2021068262A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting

Definitions

  • the invention relates to the technical field of soft foundation reinforcement and environmental protection, and in particular to a soft foundation reinforcement component based on the shape of an artificial soil arch with adjustable and stress locking.
  • the commonly used preloading method to treat soft foundations requires inserting a plastic drainage board into the foundation and setting a drainage cushion, and then using earthwork or other forms of stacking on the drainage cushion for long-term preloading to achieve softness. Drainage reinforcement of the foundation to meet the needs of engineering construction, this process has the following shortcomings: (1) Long processing time; (2) Environmentally unfriendly plastic drainage board; (3) Large amount of earthwork construction work, construction machinery The energy consumption and the consumption of manpower and material resources are relatively high.
  • Another commonly used process for soft foundation treatment is vacuum preloading technology, which is different from stack preloading. It uses vacuum preloading.
  • the process also has the following shortcomings: (1) The processing time is relatively long, generally more than one month; (2) There is also the environmental unfriendliness of the plastic drainage plate; (3) The vacuum pump operation project requires a lot of consumption Of electrical energy.
  • For soft foundation treatment there is also a composite foundation method commonly used in engineering, using pile foundation reinforcement, or adding cementing agents (cement, lime, etc.) to the soil.
  • the main principle of pile foundation is to share the main load of the building through rigid piles or relatively rigid piles, and transfer the stress through the piles to the deep soil or bedrock with higher strength.
  • the main disadvantages of this process are: (1) The foundation has Certain requirements, to meet the construction conditions of the pile machine; (2) The cost is relatively high; (3) In the later construction, if these pile foundations need to be removed, the difficulty and cost are both high; (4) The construction period is also relatively long (It depends on the pile type, length and layout density to have a greater impact). Using cement to stir the soft foundation is also a commonly used soft foundation treatment process in engineering.
  • This process mainly relies on the cementing effect of the cement and the consumption of water in the soft foundation during the chemical reaction process, reducing the basic moisture content, and improving the strength of the soil. Realize the reinforcement of soft foundations.
  • the main disadvantages of this process are: (1) A large amount of cement and lime are added to the soil, and the nature of the severely damaged soil makes it difficult for the soil to be ecologically restored; (2) The general treatment depth is relatively shallow; (3) The treatment cost is high; (4) The processing time is relatively long.
  • the present invention provides a soft foundation reinforcement member based on the shape of the artificial soil arch with adjustable and stress locking.
  • the soft foundation reinforcement structure makes full use of fillers (high permeability materials such as gravel, coarse sand)
  • fillers high permeability materials such as gravel, coarse sand
  • the physical and mechanical properties through the wrapping constraint of the geobag, the shape control of the internal truss belt and the stress locking of the locking mechanism, make the internal filling form an artificial soil arch while maintaining a high binding force.
  • the soft foundation reinforcement component is arranged in splicing form on the surface of the soft foundation.
  • the soft foundation reinforcement structure has good permeability characteristics, it avoids the accumulation of excess pore pressure at the bottom of the foundation due to vibration loads (earthquakes, vehicle vibration loads, etc.).
  • vibration loads earthquakes, vehicle vibration loads, etc.
  • the vibration load is transmitted during the propagation of the internal fillings of the components.
  • the higher wrapping force results in greater friction between the fillers, the vibration energy dissipates faster, and reduces the impact of vibration loads on the building. It has good seismic characteristics.
  • the component also has many advantages such as fast construction speed, no pollution, and low construction energy consumption.
  • the purpose of the present invention is to provide an efficient and environmentally friendly soft foundation reinforcement member with adjustable and stress-locked shapes of artificial soil arches, so as to realize high-efficiency, low-energy consumption and environment-friendly reinforcement of soft foundations.
  • Adjustable soft foundation reinforcement components based on the shape of artificial soil arches including geobags and internal fillings, several base belts set on the geobags, internal truss belts, a lifting belt and a locking device;
  • the geobag is made of anti-aging, water-permeable and degradable material, and its shape is a hollow equilateral polygonal prism, and the top surface can be opened;
  • the base belt is attached to the side and bottom of the geobag.
  • a number of base belts are evenly arranged at the bottom in a manner diverging from the center point to the surroundings, extending from the center of the bottom to the outer side of the geobag, and then along the top surface to the center of the top of the geotechnical belt. position;
  • the internal truss belt is arranged inside the geobag, one end is connected to the base belt, and the other end is connected to the lifting belt; the middle and lower part of the lifting belt is located inside the geobag, and the bottom end is connected to each base belt, the middle part and the inner part Truss connection, the upper end passes through the center point of the upper part of the geobag, and a flexible lifting ring is set on the top;
  • the locking device is arranged on the lifting belt, at the position where the lifting belt and the top of the geobag are connected, and the position can be adjusted up and down;
  • the internal filling material is a material with high permeability such as crushed stone, sand gravel, coarse sand, etc., and the filling material is filled inside the geobag.
  • the component of the present invention through the self-weight of the internal truss belt, the base belt and the geobag during the hoisting process, makes the internal filling form an artificial soil arch shape, and is locked by the locking mechanism, so that the geobag, the internal truss belt and the base belt It is under tension to maintain the high wrapping force of the inner filling and the shape of the component.
  • the soft soil at the lower part of the component is attached to the bottom of the component.
  • the soft soil under a certain depth of The strength of soft soil; since the bottom of the component forms an arc shape to buckle the surface of the soft foundation, the lower part of the component has a certain bite with the foundation soil, which has strong shear resistance, and can transform the overburden load into an oblique downward load.
  • the vertical force component of the small overburden load reduces the impact of the overburden load on the foundation, reduces the settlement and deformation of the foundation, meets engineering needs, and realizes efficient, low energy consumption and environmentally friendly reinforcement of soft foundations.
  • the geobag is an anti-aging, water-permeable and degradable material, with a small amount of material creep, preventing creep from occurring under the continuous action of tension, resulting in a decrease in the packing power of the filler.
  • the geobag is a regular hexagon in plan view, the side is regarded as a rectangle, the side length of the regular hexagon is 0.5m-0.8m; the side view rectangle has a width of 1m-1.6m and a height of 0.4m-0.5m,
  • the main body shape is a regular hexagonal prism; the bottom and surroundings of the geobag are closed structures, and the top is composed of 6 equilateral triangles.
  • the 6 equilateral triangles form a regular hexagon, and the connected parts of the 6 equilateral triangles are partially overlapped.
  • velcro Set up velcro (HOOk&LOOP, one side of the velcro is small and soft fiber, round hair (LOOP), the other side is the harder bristles with hooks (HOOK)), the 6 equilateral triangles are connected by velcro to form a closed geotextile bag.
  • LOOP soft fiber, round hair
  • HOOK harder bristles with hooks
  • deformation folds are reserved in the regular polygonal area at the bottom of the geobag to meet the deformation requirements of the artificial soil arch.
  • the base belt is woven and formed of nylon material and stitched together with the geobag.
  • the base belt starts from the center of the regular hexagon at the bottom of the geobag and is attached to the outer surface of the geotechnical belt in a divergent form and extends to The top of the geobag is converged at the center of the top regular hexagon, and there are 6 base belts corresponding to the six corners of the regular hexagon.
  • the internal truss belts are in 6 groups, corresponding to 6 base belts respectively.
  • the two ends of the truss belts are respectively connected with the bottom base belt and the lifting belt; each truss belt is composed of a main belt and a secondary belt.
  • the upper end of the belt is connected to the lifting belt, the upper end of the auxiliary belt is connected to the main belt, the bottom of the main belt and the auxiliary belt are connected to the bottom base belt, and the main belt and the auxiliary belt form a herringbone shape.
  • the internal truss belt has two main belts, the outer main belt and the lifting belt maintain a 60° included angle, and the inner main belt and the lifting belt maintain a 40° included angle;
  • the length of the main belt and the auxiliary belt of the internal truss belt can be adjusted according to the type of filling material to adapt to the arch height of different artificial soil arches, and the load transfer direction inside the filling material and the friction of the material The angle and the stress state are related.
  • the arch shape of the component and the main stress direction of the filling material are kept as consistent as possible, so as to maximize the load transfer effect of the artificial soil arch.
  • the lifting belt is woven and formed of nylon material, and the bottom of the lifting belt is connected to the starting point of the base belt (the center point of the regular hexagon at the bottom), passing through the regular hexagon center point of the top of the geobag and extending to the top of the geobag.
  • the top of the hoisting belt is equipped with a flexible hoisting ring to facilitate the hoisting of the hoist; the hoisting belt can be divided into an inner section inside the geo-bag and an outer section extending beyond the geo-bag.
  • the inner section of the hoisting belt is connected with the inner truss belt to connect The lifting force is transmitted to the control point position of the bottom base belt through the truss belt, so that the component naturally forms an arch under the action of its own weight.
  • the locking device is arranged on the top surface of the geobag at the outer section of the lifting belt, and the locking device is arranged on the lifting belt.
  • the geobag, the inner truss belt and the base belt are under tension.
  • the locking device can be locked to ensure that if the lifting belt loses the lifting force after the component is hoisted, the inner section of the lifting belt is kept in tension and the tension of the entire bag body is maintained;
  • the locking device is made of nylon material or stainless steel material, and consists of a base and a locker, and the locker is arranged on the base.
  • the lock can adopt a wedge-shaped self-locking form or a zigzag locking form.
  • the base of the locking device is circular with a diameter of 10cm-15cm.
  • the base is set at the center of the top of the geobag.
  • the lifting belt is from the locking device. Through the inside, the locker acts on the lifting belt. When the geobag reaches the tensioned state and the component shape is completed, the locker enters the locked state.
  • the soft foundation reinforcement component of the present invention relies on the joint action of geobags, base belts, lifting belts and truss belts, so that under the action of the filling material's own weight, the component naturally forms an arc-shaped bottom at the bottom, and is locked by a locking device.
  • the soft foundation reinforcement component is laid on the surface of the soft foundation, and relying on its own weight and its own good drainage performance, it promotes the rapid consolidation of the soil at a certain depth at the bottom of the component and improves the foundation.
  • the upper vertical load is converted into horizontal load and vertical load.
  • the horizontal load is offset by each other between the components, which realizes the transfer and dispersion of the upper load and reduces the vertical load on the soft foundation.
  • the use of the soft foundation reinforcement component to strengthen the soft foundation has the following main advantages: (1) Compared with the traditional soft foundation reinforcement technology, the soft foundation reinforcement speed of the component of the present invention is very fast. It can be completed, and the treatment efficiency is very high; (2) The treatment cycle is short, and there is almost no need to wait after the paving is completed, which can meet the operating conditions of the construction machinery; (3) There is no addition of any substance in the soft foundation, which will not cause damage to the soil Environmental pollution; (4) Reusable, very economical and practical for temporary construction road paving, temporary passage of construction machinery, etc.; (5) As a building foundation, it can effectively eliminate the excessive pore pressure at the bottom of the foundation caused by vibration loads. Accumulate, have better seismic performance.
  • Fig. 1 is a top view of a soft foundation reinforcement member of embodiment 1 of the present invention
  • Figure 2 is a cross-sectional view of Figure 1 a-a;
  • the schematic diagrams of the components shown in Figure 1 and Figure 2, based on the shape of the artificial soil arch can be adjusted and the stress-locked soft foundation reinforcement component, the internal filler 7 set in the geobag 8 by the geobag 8 and the geotextile
  • the bag 8 is composed of a flexible lifting ring 1, a base belt 2, a lifting belt 3, a locker 4, a truss belt, a Velcro 9 and a gasket 10.
  • the main body of the geobag 8 is made of anti-aging, water-permeable and degradable material. It is a regular hexagon when viewed from the top, and the side is regarded as a rectangle.
  • the side length of the regular hexagon is 0.5m-0.8m; the side view rectangle is 1m-1.6m wide and 0.4m high.
  • the main shape is a regular hexagonal prism; the bottom and surroundings of the geobag are closed structures.
  • the upper part is composed of 6 triangles, and the 6 triangles can be opened and closed by Velcro 9.
  • the deformation folds are reserved in the regular hexagonal area at the bottom to meet the deformation requirements of the artificial soil arch.
  • the base belt 2 is evenly distributed on the bottom, around and on the top of the geobag 8.
  • the base belt 2 is made of nylon material and stitched together with the geobag.
  • the base belt 2 starts from the center of the regular hexagon at the bottom of the geobag and adopts a divergent form. Attached to the outer surface of the geotechnical belt, extending to the top of the geotechnical bag and intersecting at the center of the top regular hexagon.
  • the base belt 2 has 6 strips corresponding to the six corners of the regular hexagon.
  • the truss belt is composed of the truss belt main belt 6 and the truss belt auxiliary belt 5.
  • the lower ends of the truss belt main belt 6 and the truss belt auxiliary belt 5 are connected to the base belt 2, and the truss belt main belt
  • the upper section of 6 is connected to the lifting belt 3
  • the upper end of the truss belt auxiliary belt 5 is connected to the truss belt main belt 6, and the main belt 6 and the auxiliary belt 5 form a herringbone shape.
  • the length of the main belt 6 and the auxiliary belt 5 of the internal truss belt can be adjusted according to the type of filling material to adapt to the arch height of different artificial soil arches.
  • the direction of load transfer inside the filling material is related to the friction angle and stress state of the material. Adjust different arch heights so that the arch shape of the component and the main stress direction of the filling material are as consistent as possible, so as to maximize the load transfer effect of the artificial soil arch.
  • the lower part of the lifting belt 3 is located in the inner part 2 of the geobag, the bottom end is connected to the bottom center point O of the base belt 2, the middle part is connected to the inner truss belt, the upper end passes through the upper center point of the geobag 2, and the top is set with a flexible lifting ring lifting belt 3 to pass upwards Pass through the inside of the geobag 8 and extend through the base 10 and the locker 4 to the upper part of the geobag 8.
  • the upper part of the lifting belt 3 is provided with a flexible lifting ring 1 to facilitate the lifting and laying of components.
  • the locking device is made of nylon material or stainless steel material and consists of a base 10 and a locker 4, and the locker 4 is arranged on the base 10.
  • the locker 4 can adopt a wedge-shaped self-locking form or a zigzag locking form.
  • the base 10 is circular and has a diameter of 10cm-15cm.
  • the base 10 is set at the center of the top of the geobag.
  • the lifting belt 3 is locked from The device passes through, and the locker 4 acts on the lifting belt 3.
  • the locker 4 enters the locked state.
  • the geobag 8 into a regular hexagonal mold, and tear apart the Velcro 9 between the 6 triangles on the upper part to make the upper part of the geobag 8 open, and then fill the inner filler 7 into the geobag 8.
  • the 6 triangles on the upper part of the geobag 8 are pasted together by the velcro 9, the lifting belt 3 is passed through the gasket 10 and the locker 4, and the flexible lifting ring 1 on the upper part of the lifting belt 3 is connected to the hoist hook.
  • the locker 4 is in the unlocked state; afterwards, the component is hoisted out of the mold by a hoist, relying on the weight of the inner filler 7 and the main belt 6, the auxiliary belt 5, the lifting belt 3 and the base belt 2. Together, the bottom of the component is formed into an arc-like depression, and then the locker 4 is clamped and locked, so that the geobag 8 is kept in a tensioned state.
  • the crane sling Hoist to the position of the soft foundation to be treated by a crane for laying, and use the crane sling to pre-compress the laid soft foundation reinforcement component, and the pre-pressure is not less than twice the weight of the component.
  • the pre-compression time is not less than 2 minutes, and the number of pre-compression is not less than 3 times.
  • the next component can be hoisted and laid in line with the previously laid components to finally complete the overall reinforcement of the soft foundation to be processed.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Revetment (AREA)

Abstract

La présente invention concerne un élément de renforcement de fondation meuble de forme réglable à base d'arche de sol artificiel, comprenant un sac de terre et des matériaux de remplissage internes, plusieurs sangles de base et des sangles de renfort internes disposées sur le sac de terre, une sangle de levage et un dispositif de verrouillage. Le sac de terre est constitué d'un prisme polygonal régulier, et une pluralité de sangles de base sont disposées sur le fond, la périphérie et le sommet du sac de terre, et correspondent respectivement aux lignes diagonales du polygone régulier. De multiples sangles de renfort internes sont disposées à l'intérieur du sac de terre, les parties inférieures des sangles de renfort internes sont reliées aux sangles de base, et les parties supérieures de celles-ci sont reliées à la sangle de levage, l'extrémité inférieure de la sangle de levage est reliée au point central de la partie inférieure de la sangle de base et s'étend à travers l'intérieur du sac de terre jusqu'au-dessus de la partie supérieure du sac de terre, et le dispositif de verrouillage est disposé dans une position dans laquelle la sangle de levage croise la partie supérieure du sac de terre. La présente invention peut former un évidement arqué au fond de l'élément, réduit la transmission des charges verticales vers l'intérieur de la fondation tout en consolidant la charge de surcharge de strate de faible profondeur de la fondation meuble, ce qui permet de réduire la sédimentation de la fondation meuble et d'obtenir un traitement de renforcement très efficace, à faible consommation d'énergie et respectueux de l'environnement sur la fondation meuble.
PCT/CN2019/110884 2019-10-12 2019-10-12 Élément de renforcement de fondation meuble de forme réglable à base d'arche de sol artificiel WO2021068262A1 (fr)

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PCT/CN2019/110884 WO2021068262A1 (fr) 2019-10-12 2019-10-12 Élément de renforcement de fondation meuble de forme réglable à base d'arche de sol artificiel

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Application Number Priority Date Filing Date Title
PCT/CN2019/110884 WO2021068262A1 (fr) 2019-10-12 2019-10-12 Élément de renforcement de fondation meuble de forme réglable à base d'arche de sol artificiel

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114232592A (zh) * 2021-12-31 2022-03-25 华东交通大学 一种地基加固构件装置及施工方法
CN114351729A (zh) * 2021-11-23 2022-04-15 王琪 一种装配式地固件护坡与垫层结构及其铺设方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005064086A1 (fr) * 2003-12-25 2005-07-14 Hiroyuki Kida Sac a sable et digue etanche
WO2008029771A1 (fr) * 2006-09-07 2008-03-13 Matsuoka, Hajime Structure de guidage de sac de sable et procédé de construction par sacs de sable l'utilisant
CN101796249A (zh) * 2007-08-21 2010-08-04 野本太 形状保持型吊运式长方体包
CN202830911U (zh) * 2012-09-18 2013-03-27 中国水电顾问集团华东勘测设计研究院 一种内置十字钢索的尼龙搭扣土工袋
KR101764242B1 (ko) * 2017-05-12 2017-08-04 주식회사 포유텍 조임끈이 구비된 소일 백
CN107938644A (zh) * 2017-12-26 2018-04-20 水利部交通运输部国家能源局南京水利科学研究院 一种充气式土工袋及其施工方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005064086A1 (fr) * 2003-12-25 2005-07-14 Hiroyuki Kida Sac a sable et digue etanche
WO2008029771A1 (fr) * 2006-09-07 2008-03-13 Matsuoka, Hajime Structure de guidage de sac de sable et procédé de construction par sacs de sable l'utilisant
CN101796249A (zh) * 2007-08-21 2010-08-04 野本太 形状保持型吊运式长方体包
CN202830911U (zh) * 2012-09-18 2013-03-27 中国水电顾问集团华东勘测设计研究院 一种内置十字钢索的尼龙搭扣土工袋
KR101764242B1 (ko) * 2017-05-12 2017-08-04 주식회사 포유텍 조임끈이 구비된 소일 백
CN107938644A (zh) * 2017-12-26 2018-04-20 水利部交通运输部国家能源局南京水利科学研究院 一种充气式土工袋及其施工方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114351729A (zh) * 2021-11-23 2022-04-15 王琪 一种装配式地固件护坡与垫层结构及其铺设方法
CN114232592A (zh) * 2021-12-31 2022-03-25 华东交通大学 一种地基加固构件装置及施工方法

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