CN108914959B - Foundation structure suitable for mountain house building and construction method thereof - Google Patents

Foundation structure suitable for mountain house building and construction method thereof Download PDF

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Publication number
CN108914959B
CN108914959B CN201810762988.3A CN201810762988A CN108914959B CN 108914959 B CN108914959 B CN 108914959B CN 201810762988 A CN201810762988 A CN 201810762988A CN 108914959 B CN108914959 B CN 108914959B
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pile
cast
pouring
mountain
steel casing
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CN108914959A (en
Inventor
肖衡林
周文佐
刘永莉
马强
李丽华
肖本林
陈智
黄思璐
巴军涛
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Hubei University of Technology
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Hubei University of Technology
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E02D15/04Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/18Making embankments, e.g. dikes, dams
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/10Deep foundations
    • E02D27/12Pile foundations
    • E02D27/16Foundations formed of separate piles
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02Improving by compacting
    • E02D3/10Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/38Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • E02D5/385Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00Production methods
    • E02D2250/003Injection of material

Abstract

The invention discloses a foundation structure suitable for building in a mountain area and a construction method thereof, wherein the foundation structure comprises a retaining wall protection slope and a plurality of cast-in-place piles arranged in the retaining wall protection slope, the surface of a mountain bedrock is cleaned firstly, and then a pile hole at the bottom of the cast-in-place pile is formed by drilling; then, constructing a retaining wall for protecting slope, piling up the outer side below the feet of the mountain by adopting a binge lattice net made of large rocks to form an outer wall surface, paving and filling broken stones between the outer wall surface and the mountain, embedding a permeable pipe for draining water in the broken stones, and installing a steel protecting cylinder in a bottom pile hole when the broken stones are paved and filled to the bottom pile hole; until the retaining wall slope protection reaches the building design elevation; binding the reinforcement cage, and putting the reinforcement cage and the concrete guide pipe into the steel casing; pouring the pile hole through the concrete guide pipe, and simultaneously pulling out the steel pile casing after pouring; and (4) pouring a bearing platform for building on the pile top of the cast-in-place pile, namely completing the construction of the foundation structure suitable for the building in the mountainous area. The invention makes full use of the hillside terrain and saves space and raw materials.

Description

Foundation structure suitable for mountain house building and construction method thereof
Technical Field
The invention belongs to the field of engineering construction, relates to a house foundation, and particularly relates to a foundation structure suitable for building in a mountain area and a construction method thereof, in particular to a construction method which is used for solving the problems that the construction land is small and muck cannot be transported outside in the urban extraurban time-delay of the mountain area, saves material materials, and is environment-friendly and stable in structure.
Background
Along with the rapid development of urbanization in China, the contradiction between human and land is gradually increased, and intensive utilization of land is concerned more and more. In some cities in southwest and middle mountain areas of China, the urban extension is blocked by mountainous gullies due to insufficient construction land in urban development. For mountain excavation, mountain-through tunneling and other methods, a large amount of rock muck is usually generated in the construction process, and the muck cannot be transported and removed due to factors such as terrain, environment, policy and the like, so that resources are wasted during construction, the engineering cost is increased, and adverse effects are generated on the surrounding environment. Therefore, there is a need for a retaining wall and a building foundation structure and construction method using gravel and muck for backfill to solve the above problems.
Disclosure of Invention
The invention aims to solve the problem of extension of urban development in mountainous areas; ecological environment problems of mountain area building engineering; the foundation structure is simple in construction process, safe, reliable and environment-friendly and is suitable for mountain house construction.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides a foundation structure suitable for mountain area house is built which characterized in that: including the retaining wall bank protection and locate a plurality of bored concrete piles in the retaining wall bank protection, the bin check net that the outside wall of retaining wall bank protection adopted the bold rock to make is piled up and is formed, and the bedding fills the rubble between outside wall and the massif to pre-buried pipe of permeating water that is used for the drainage in the rubble, bored concrete pile bottom load is on massif basement rock, and a plurality of bored concrete pile tops set up the cushion cap that is used for the room to build.
As the priority, the outside of retaining wall bank protection is preceding to adopt cascaded shrink structure, and every shrink ladder corresponds a rubble and spreads the layer, and the bedding grid geotechnological cloth between the adjacent rubble is spread the layer.
Preferably, each gravel layer is provided with a row of water permeable pipes arranged from the mountain to the outside.
Preferably, the cast-in-place pile is a cast-in-place concrete cast-in-place pile.
A foundation structure construction method suitable for mountain area house building is characterized by comprising the following steps:
firstly, foundation treatment, namely cleaning weathered rocks on the surface of a mountain on mountain bedrock of a mountain area to be built, and then drilling holes to form pile holes at the bottom of a cast-in-place pile;
step two, constructing a retaining wall for protecting slope, namely piling up a binge lattice net made of large rocks on the outer side below the feet of a mountain to form an external wall surface, paving broken stones between the external wall surface and the mountain, embedding a water permeable pipe for draining water in the broken stones, and installing a steel protecting cylinder in a bottom pile hole when the broken stones are paved to the bottom pile hole;
step three, continuously building an external wall surface and filling broken stones, and adding a section of steel casing on the steel casing when the broken stones are filled at the upper opening of the steel casing until the slope protection of the retaining wall reaches the building design elevation;
pouring the cast-in-place pile, pouring the cast-in-place pile in a pile hole formed by the steel casing, and pulling out the steel casing after pouring;
and fifthly, after the cast-in-place pile is solidified, pouring a bearing platform for building on the pile top of the cast-in-place pile, and finishing the construction of the foundation structure suitable for building in the mountainous area.
Preferably, the outer wall surface of the retaining wall protection slope is constructed by adopting a stepped shrinkage type layered stacking method, each layer of outer wall surface is built, a layer of broken stone is paved between the outer wall surface and a mountain body, grid geotextile is paved on the top of the broken stone layer, and a row of water permeable pipes for draining water are pre-buried in each layer of broken stone.
Preferably, in the first step, during the construction of the bottom pile hole, the hole is drilled to the rock bearing stratum.
Preferably, the steel casing is connected through a connecting buckle, and the water permeable pipe is a plastic water permeable pipe.
Preferably, the cast-in-place pile is cast according to the following steps:
step 1.1, bundling a reinforcement cage, and lowering the reinforcement cage into a steel casing;
step 1.2, putting the concrete guide pipe for pouring the concrete into the steel casing;
and 1.3, pouring the space formed inside the steel casing through the concrete guide pipe, in the pouring process, pulling out the steel casing and the concrete guide pipe while pouring until the space formed by the original steel casing is full of concrete, simultaneously, the concrete also permeates into peripheral broken stone seams in the pouring process, and the cast-in-place pile and the peripheral broken stones form a stable pile foundation structure after curing, namely, the pouring of the cast-in-place pile is completed.
Preferably, in the pouring process of the cast-in-place pile, the concrete guide pipe and the steel casing are always below the concrete liquid level until the top of the elevation of the cast-in-place pile is poured, and the steel casing and the concrete guide pipe are pulled out upwards synchronously.
The invention has the beneficial effects that:
the invention creatively provides a stable and reliable construction method for the building foundation of the mountain area, and the technology not only can fully utilize the terrain and save the space, but also can fully utilize rock dregs in the processes of mountain excavation and mountain tunnel penetration, thereby greatly saving the resources and reducing the damage of the mountain.
Drawings
FIG. 1 is a sectional view of a mountain bedrock.
FIG. 2 is a sectional view of a mountain bedrock hole to a bearing stratum.
Fig. 3 is a preliminary sectional view of retaining wall bank protection and pile foundation structure construction.
Fig. 4 is a cross-sectional view of the arrangement of the grid geotextile and the steel casing.
Fig. 5 is a cross section effect diagram of the pile body of the cast-in-place pile after pile forming.
FIG. 6 is a cross-sectional view of the construction of lowering a reinforcement cage, pulling out a steel casing and pouring concrete.
Fig. 7 is a detailed longitudinal section view of a pile foundation structure of the cast-in-place pile.
Fig. 8 is a sectional view of the construction completion of the retaining wall revetment and cast-in-place pile.
Fig. 9 is a retaining wall bank protection and bored concrete pile foundation structure effect picture.
1-mountain bed rock, 2-bottom pile hole, 3-grid geotextile, 4-broken stone, 5-steel casing, 6-steel reinforcement cage, 7-cast-in-place pile, 8-bearing platform, 9-house building, 10-connecting buckle, 11-permeable pipe, 12-external wall surface, 13-concrete and 14-concrete guide pipe.
Detailed Description
The invention will now be illustrated by way of example with reference to the accompanying drawings, in which
The utility model provides a foundation structure suitable for mountain area building, includes retaining wall bank protection and locates a plurality of bored concrete pile 7 in the retaining wall bank protection, the bin grid that outside wall 12 of retaining wall bank protection adopted the bold rock to make is piled up and is formed, specifically is to adorn the bold rock and form the gabion in the bin grid to pile up and form stable retaining wall bank protection structure, pave between outside wall 12 and the massif and fill rubble 4, and pre-buried tub 11 of permeating water that is used for the drainage in rubble 4, 7 bottom bearing of bored concrete pile are on massif basement rock 1, and 7 tops of a plurality of bored concrete pile set up the cushion cap 8 that is used for the room to build.
The front of the outer part of the retaining wall slope protection adopts a stepped shrinkage structure, each shrinkage step corresponds to one gravel layer, and a grid geotextile 3 is laid between the adjacent gravel layers; a row of water permeable pipes 11 arranged from the mountain to the outside are arranged in each gravel pavement.
As a more preferred embodiment, the cast-in-place pile 7 is a cast-in-place concrete cast-in-place pile 7.
A foundation structure construction method suitable for mountain area building comprises the following steps:
firstly, foundation treatment, namely cleaning weathered rocks on the surface of a mountain on mountain bedrock 1 of a mountain area to be built, and then drilling to form a pile hole 2 at the bottom of a cast-in-place pile;
step two, constructing the protective slope of the retaining wall, namely piling up the outer side of the foot of the mountain by adopting a binge lattice net made of large rocks to form an outer wall surface 12, paving and filling broken stones 4 between the outer wall surface 12 and the mountain, embedding a water permeable pipe 11 for draining water in the broken stones 4, and installing a steel protective cylinder 5 in the bottom pile hole 2 when the broken stones 4 are paved to the bottom pile hole 2;
step three, continuously building the external wall surface 12 and filling the broken stones 4, constructing the external wall surface 12 of the retaining wall protection slope by adopting a stepped contraction type layered building method, generally forming a step-shaped step shape which is gradually contracted on the external wall surface 1, being beneficial to the stability of the protection slope, paving a layer of broken stones 4 between the external wall surface 12 and a mountain body when building one layer of external wall surface 12, paving the grid geotextile 3 at the top of each layer of broken stone layer, and synchronously paving the grid geotextile 3 and performing pore-forming construction; a row of water permeable pipes 11 for draining water are pre-buried in each layer of the gravels 4; when the broken stone 4 is filled at the upper opening of the steel casing 5, a section of steel casing 5 is added on the broken stone until the slope protection of the retaining wall reaches the building design elevation;
pouring the cast-in-place pile 7, pouring the cast-in-place pile 7 in the steel casing 5, pulling out the steel casing 5 after pouring, and pouring the cast-in-place pile 7 specifically according to the following steps:
step 1.1, bundling a reinforcement cage 6, and lowering the reinforcement cage 6 into a steel casing 5;
step 1.2, putting the concrete guide pipe 14 for pouring the concrete 13 into the steel casing 5;
step 1.3, pouring a pile hole formed in the steel casing 5 through the concrete guide pipe 14, in the pouring process, pulling out the steel casing 5 and the concrete guide pipe 14 while pouring until a space formed by the original steel casing 5 is full of concrete 13, meanwhile, the concrete 13 also permeates into the gap of the peripheral broken stones 4 in the pouring process, and after solidification, the cast-in-place pile 7 and the broken stones around the cast-in-place pile form stable pile foundation structure, namely, the casting of the cast-in-place pile 7 is completed.
And step five, after the cast-in-place pile 7 is solidified, pouring a bearing platform 8 for building construction on the pile top of the cast-in-place pile 7, namely finishing the construction of the foundation structure suitable for building construction in the mountainous area, and performing building construction on the bearing platform 8.
It should be noted that, in the first step, when the bottom pile hole 2 is constructed, drilling is carried out until the rock bearing stratum (shallower); the steel protecting cylinders 5 are connected through the connecting buckles 10, the optimal connecting position between the steel protecting cylinders 5 is arranged in the middle of each layer of the gravel layer, and in the specific embodiment, the connecting position between the steel protecting cylinders 5 is higher than the height of the geogrid geotextile 3 on each layer of the gravel layer by 300-500 mm. In the laying process of the grid geotextile 3, the grid geotextile 3 provided with the steel casing 5 needs to be cut into a round hole with the same size as the steel casing 5 so as to better stack the gravel layers in a layered manner;
the permeable pipe 11 is a plastic permeable pipe 11. In the pouring process of the cast-in-place pile 7, the concrete guide pipe 14 and the steel casing 5 are always below the concrete liquid level until the concrete is poured to the top of the elevation of the cast-in-place pile 7, and the steel casing 5 and the concrete guide pipe 14 are pulled out upwards synchronously; in the embodiment, in the pouring process, the concrete guide pipe 14 is always positioned about 1.5m-2m below the liquid level of the concrete, so that a certain static pressure is generated at the outlet of the concrete guide pipe 14, the concrete 13 is poured more compactly, the steel pile casing 5 is always kept about 0.8m-1.0m below the liquid level of the concrete, when the concrete 13 is poured to the designed elevation of the cast-in-place pile 7, the steel pile casing 5 and the concrete guide pipe 14 are pulled out at the same time, and the cast-in-place pile 7 can be poured after the concrete 13 is cured; it should be noted that, in the process of pouring the concrete 13, because the steel casing 5 is pulled out while pouring, the concrete 13 which is not solidified can permeate into the surrounding broken stones 4 seams, so that the cast-in-place pile 7 and the surrounding broken stones form a stable pile foundation structure after solidification, the compactness around the pile wall can be increased after pile forming, the bearing capacity and the stability of the pile body can be increased, and the hole collapse phenomenon caused by the falling of the broken stones on the wall of the pile hole can be prevented.
It should be noted that the filled crushed stone 4 adopted in the embodiment can be obtained from local materials, is formed by crushing mountain rocks, and can be paved by using soil mixed crushed stones with a certain proportion during concrete paving.

Claims (3)

1. A foundation structure construction method suitable for mountain area house building is characterized by comprising the following steps:
firstly, foundation treatment, namely cleaning weathered rocks on the surface of a mountain on mountain bedrock of a mountain area to be built, and then drilling holes to form pile holes at the bottom of a cast-in-place pile;
step two, constructing a retaining wall for protecting slope, namely piling up a binge lattice net made of large rocks on the outer side below the feet of a mountain to form an external wall surface, paving broken stones between the external wall surface and the mountain, embedding a water permeable pipe for draining water in the broken stones, and installing a steel protecting cylinder in a bottom pile hole when the broken stones are paved to the bottom pile hole;
step three, continuously building an external wall surface and filling broken stones, and adding a section of steel casing on the steel casing when the broken stones are filled at the upper opening of the steel casing until the slope protection of the retaining wall reaches the building design elevation;
pouring the cast-in-place pile, pouring the cast-in-place pile in a pile hole formed by the steel casing, and pulling out the steel casing after pouring;
step five, after the cast-in-place pile is solidified, a bearing platform for building is cast on the pile top of the cast-in-place pile, and then the foundation structure construction suitable for the building in the mountainous area is completed;
the outer wall surface of the retaining wall protection slope is constructed by adopting a stepped contraction type layered stacking method, each layer of outer wall surface is built, a layer of broken stone is paved between the outer wall surface and a mountain body, grid geotextile is paved on the top of the broken stone layer, and a row of water permeable pipes for drainage are pre-buried in each layer of broken stone;
the cast-in-place pile is cast according to the following steps:
step 1.1, bundling a reinforcement cage, and lowering the reinforcement cage into a steel casing;
step 1.2, putting the concrete guide pipe for pouring the concrete into the steel casing;
step 1.3, forming a space inside the steel casing through a concrete guide pipe, pouring, and pulling out the steel casing and the concrete guide pipe while pouring until the space formed by the original steel casing is full of concrete, wherein the concrete also permeates into peripheral broken stone seams in the pouring process, and the cast-in-place pile and the peripheral broken stones form a stable pile foundation structure after curing, namely the pouring of the cast-in-place pile is completed;
in the pouring process of the cast-in-place pile, the concrete guide pipe and the steel casing are always positioned below the concrete liquid level until the top of the elevation of the cast-in-place pile is poured, and the steel casing and the concrete guide pipe are pulled out upwards synchronously.
2. The foundation structure construction method as claimed in claim 1, wherein: in the step one, when the pile hole at the bottom is constructed, a hole is drilled to a rock bearing stratum.
3. The foundation structure construction method as claimed in claim 1, wherein: the steel protects and links to each other through the connector link between the section of thick bamboo, the pipe of permeating water is the plastics pipe of permeating water.
CN201810762988.3A 2018-07-12 2018-07-12 Foundation structure suitable for mountain house building and construction method thereof Active CN108914959B (en)

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CN201810762988.3A CN108914959B (en) 2018-07-12 2018-07-12 Foundation structure suitable for mountain house building and construction method thereof

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Application Number Priority Date Filing Date Title
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CN108914959B true CN108914959B (en) 2020-08-25

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110284713A (en) * 2019-07-03 2019-09-27 福建卓畅建设有限公司 The room construction method suitable for mountain area mounted inside type villa based on BIM

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106284314A (en) * 2016-08-31 2017-01-04 中冶建工集团有限公司 Karst landform spiral-digging pore cast-in-place pile construction method
CN107386310A (en) * 2017-08-15 2017-11-24 广东工业大学 A kind of building supporting construction and its implementation applied to slope terrain
CN207331728U (en) * 2017-08-15 2018-05-08 广东工业大学 A kind of building supporting construction applied to slope terrain

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106284314A (en) * 2016-08-31 2017-01-04 中冶建工集团有限公司 Karst landform spiral-digging pore cast-in-place pile construction method
CN107386310A (en) * 2017-08-15 2017-11-24 广东工业大学 A kind of building supporting construction and its implementation applied to slope terrain
CN207331728U (en) * 2017-08-15 2018-05-08 广东工业大学 A kind of building supporting construction applied to slope terrain

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