CN113431083A - Light supporting structure of pile foundation joist and construction method thereof - Google Patents
Light supporting structure of pile foundation joist and construction method thereof Download PDFInfo
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- CN113431083A CN113431083A CN202110651032.8A CN202110651032A CN113431083A CN 113431083 A CN113431083 A CN 113431083A CN 202110651032 A CN202110651032 A CN 202110651032A CN 113431083 A CN113431083 A CN 113431083A
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- 238000010276 construction Methods 0.000 title claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 239000002689 soil Substances 0.000 claims description 19
- 238000009412 basement excavation Methods 0.000 claims description 18
- 239000004567 concrete Substances 0.000 claims description 11
- 238000011282 treatment Methods 0.000 claims description 11
- 239000011150 reinforced concrete Substances 0.000 claims description 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 8
- 230000004888 barrier function Effects 0.000 claims description 7
- 238000012423 maintenance Methods 0.000 claims description 6
- 230000002421 anti-septic effect Effects 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 238000009415 formwork Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0258—Retaining or protecting walls characterised by constructional features
- E02D29/0275—Retaining or protecting walls characterised by constructional features cast in situ
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
- E02D29/0233—Retaining or protecting walls comprising retention means in the backfill the retention means being anchors
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Abstract
The invention provides a light supporting structure of a pile foundation joist and a construction method thereof, wherein the light supporting structure comprises: the supporting piles, the supporting beams, the buttress type retaining wall system, the safety guardrails and the waterproof layer; the buttress type retaining wall system comprises a bottom plate, a vertical plate, a buttress arm, an anchor rod and a water drainage hole. The supporting piles are arranged on the slope toe of the side slope; the joist is positioned between the support pile and the buttress retaining wall system, and the top end of the support pile extends into the joist; the joist is connected with the buttress retaining wall system through a steel bar; the lower end of the vertical rod of the safety guardrail is embedded into the vertical plate; the waterproof layer is located the rear side of riser and the top of holding up the arm. The invention has the beneficial effects that: the deformation of the supporting structure is reduced, the stability of the supporting structure is improved, the material consumption is reduced, the engineering cost is reduced, and energy and land resources are saved; the method has the advantages of simple process, easy construction, improved safety, shortened construction period, and small influence on the surrounding environment, and is an environment-friendly green supporting structure.
Description
Technical Field
The invention relates to the field of geological engineering and geotechnical engineering, in particular to a pile foundation joist light-duty supporting structure for slope engineering combining excavation and filling and a construction method thereof.
Background
In the field of geological engineering or geotechnical engineering, different types of side slopes are formed due to implementation of engineering such as traffic, mining, construction and the like, the life and property safety of human beings is threatened, and in order to prevent geological disasters or engineering accidents caused by side slope instability, a supporting structure is often required to be arranged at the slope toe of the side slope.
The counterfort retaining wall is a thin-wall light supporting structure, the structure resists overturn through the soil mass on the upper part of the bottom plate and self gravity, resists sliding through the friction force between the bottom plate and the bearing layer, and therefore the bottom plate is required to be positioned on the bearing layer with better engineering property. The counterfort retaining wall has the advantages of simple structure, convenient construction, small wall section, light weight, small influence on the environment, environmental protection and the like, and is suitable for filling slope engineering. When the height of the side slope is large or the soil engineering property is poor, the support height is increased because the side slope needs to be over-excavated downwards to a better bearing layer, the height of the wall body and the section size of the wall body need to be increased, the manufacturing cost is greatly increased, and meanwhile, the excavation in a large range is carried out, so that the problems of side slope instability and the like are easily caused, and the application of the side slope is limited.
The support pile is a widely applied support structure, is generally longitudinally arranged at a slope toe at a certain interval, is mainly used for bearing horizontal soil pressure or landslide thrust, and is sometimes used for bearing upper vertical load. Generally, there are various pile bodies such as wooden piles, section steel piles, reinforced concrete precast piles, reinforced concrete cast-in-place piles, etc. The support pile has the advantages of mature process, easy design and construction, low construction dryness, low pollution, small disturbance to a slope body, good safety, large horizontal bending rigidity, capability of advanced support and the like, and is suitable for excavation slope engineering. When the height of a side slope or the horizontal thrust is large, the cross section of a pile body needs to be increased, so that the material consumption and the manufacturing cost are greatly increased, and the application of the pile body is limited.
Disclosure of Invention
In order to solve the problems, the invention provides a light supporting structure of a pile foundation joist and a construction method thereof, which solve the problems of large section of the supporting structure, large material consumption, heavy weight, high manufacturing cost, safe construction and the like in the excavation and filling combined slope engineering. The buttress retaining wall system on the upper part of the supporting structure, the joist in the middle part and the supporting pile on the lower part all adopt smaller section sizes. The supporting piles can bear the gravity of the upper structure and the backfill soil body, and the problem of a bearing stratum is solved; the supporting piles can bear certain horizontal force to resist forward sliding of the supporting structure, the vertical anchor rods and the backfill soil body arranged on the counterfort retaining wall bottom plate can also provide certain resistance through the counterfort, and the counterfort retaining wall system and the supporting piles bear the horizontal force together to prevent the supporting structure from overturning and sliding and ensure the stability of the supporting structure. The structure has high material utilization rate, fully exerts the mechanical properties of each component of the structure, reduces the section of the supporting structure while having larger horizontal bearing capacity, and meets the requirements of multiple aspects such as technical performance, economical efficiency, safety and the like. The pile foundation joist light-weight supporting structure and the construction method thereof effectively solve the problems of high manufacturing cost and construction potential safety hazard caused by excavation, and simultaneously solve the problems of large volume, large material consumption, large structure weight and the like of the supporting structure along with the increase of the supporting height. The method is particularly suitable for the construction of a digging and filling combined side slope or a filling side slope with the height of 6-12 m.
The invention provides a light supporting structure of a pile foundation joist, which comprises: the supporting piles, the supporting beams, the buttress type retaining wall system, the safety guardrails and the waterproof layer; the buttress type retaining wall system comprises a bottom plate, a vertical plate, a buttress arm, an anchor rod and a plurality of water drainage holes.
The supporting piles are vertically positioned at the slope toe of a side slope, the joist is horizontally positioned between the supporting piles and the counterfort retaining wall system, the top ends of the supporting piles extend into the joist, the safety guardrail is vertically and longitudinally arranged at the top end of the counterfort retaining wall system, the bottom end of the vertical rod of the safety guardrail is embedded into the vertical plate, the waterproof layer is horizontally positioned on the rear side of the vertical plate and above the counterfort, and the bottom plate is horizontally positioned at the top end of the joist; the vertical plate is vertically positioned above the bottom plate and is close to one side of the empty surface; the supporting arm is vertically positioned between the bottom plate and the vertical plate, the anchor rod is vertically positioned below the supporting arm and at the rear edge of the bottom plate, and the water drainage hole is horizontally and obliquely positioned in the vertical plate wall body.
Furthermore, the supporting piles are cylinders, and a plurality of supporting piles are longitudinally arranged at equal intervals; and/or the anchor rods are cylinders, and a plurality of anchor rods are longitudinally arranged at equal intervals.
Furthermore, the buttress retaining wall system is firmly connected with the joist through steel bars.
Furthermore, the support piles, the joists and the buttress retaining wall system are all formed by pouring reinforced concrete, and the strength grade is not less than C30; and/or the buttress retaining wall system and the joist are constructed at the same time to form a whole.
Furthermore, the safety barrier is made of wood, alloy or reinforced concrete.
Furthermore, the vertical section of the joist is rectangular, and in the transverse direction, each side of the joist exceeds the diameter outer side of the support pile; and/or the longitudinal center line of the joist coincides with the longitudinal arrangement center line of the support piles.
Further, the height of the buttress retaining wall system is 4.0-8.0 m, and the buttress retaining wall system and the joist are constructed at the same time to form a whole; and/or the waterproof layer is layered and is formed by mechanically compacting cohesive soil.
Further, the bottom plate and the vertical plate are both plate-shaped, and/or the supporting arms are triangular plates, and the supporting arms are arranged at equal intervals.
Furthermore, the material of outlet is the PVC pipe, and this PVC pipe's inclination is 5, and the back half plum blossom of pipe body is trompil.
The construction method of the pile foundation joist light supporting structure comprises the following specific steps:
s1: according to design requirements, measuring and placing the position of a supporting pile, mechanically forming a hole, then placing a reinforcement cage, pouring concrete, maintaining and detecting;
s2: a temporary water intercepting and draining system is arranged and comprises a waterproof membrane, a water intercepting and draining ditch and a water suction pump;
s3: mechanical excavation provides an anchor rod construction working surface, and anchor rod anticorrosion treatment, construction, maintenance and detection are sequentially carried out;
s4: the method comprises the following steps of mechanically assisting with manual excavation, providing a construction working surface of a joist and a counterfort retaining wall system, manually repairing the slope at the rear edge of the soil slope to be step-shaped, breaking concrete at the head of a supporting pile, reserving reinforcing steel bars with preset length, and sequentially carrying out formwork support, reinforcing steel bar binding and concrete pouring of the joist and the counterfort retaining wall system; simultaneously carrying out antiseptic treatment, embedding the safety guardrail upright rod and the drainage hole pipe, simultaneously carrying out maintenance, and tensioning and locking the anchor rod after the strength is reached;
s5: backfilling the soil body of the filling area, and compacting the waterproof layer;
s6: and performing anti-corrosion treatment and installation on other components of the safety guardrail, excavating soil in an excavation area, and constructing a permanent intercepting and draining system.
The technical scheme provided by the invention has the beneficial effects that: the supporting structure has good stress performance, reduces the deformation of the supporting structure and improves the stability of the supporting structure; the supporting structure with a smaller cross section is adopted, so that the material consumption is reduced, the engineering cost is reduced, and the energy and land resources are saved; the method has the advantages of simple process, easy construction, improved safety, shortened construction period, and small influence on the surrounding environment, and is an environment-friendly green supporting structure.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a three-dimensional view of a pile joist lightweight support structure in an embodiment of the invention;
fig. 2 is a sectional view of a pile joist lightweight support structure according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a buttress retention system in accordance with an embodiment of the present invention.
In the drawings: 1-support piles, 2-joists, 3-buttress retaining wall systems, 4-safety guardrails, 5-waterproof layers, 3.1-bottom plates, 3.2-vertical plates, 3.3-supporting arms, 3.4-anchor rods, 3.5-water drainage holes and 6-intercepting ditches.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
The embodiment of the invention is positioned in a downtown area, the original terrain of the site is a hillside, excavation is needed to build a road of a residential area, and filling is needed to form a slope combining excavation and filling for slope top greening. The height of the side slope is 18.1 meters, the mountain surface soil is above the slope bottom, and the fully weathered and strongly weathered bedrock and the like are below the slope bottom. The slope support needs to solve the problems of support structure displacement and stability requirements, land saving, environment beautifying, reduction of influences on surrounding environments and residents and the like.
Referring to fig. 1 to 3, fig. 1 is a three-dimensional view of a lightweight supporting structure for a pile joist according to an embodiment of the present invention, fig. 2 is a sectional view of a lightweight supporting structure for a pile joist according to an embodiment of the present invention, and fig. 3 is a sectional view of a buttress-type retaining wall system 3 according to an embodiment of the present invention; the total height of the side slope is 18.1 m, and the supporting scheme is as follows: the upper part of the side slope is backfilled with 9.5 meters according to the slope ratio not more than 1:1, and the lower part of the side slope is backfilled with 8.6 meters.
This kind of light-duty supporting construction of pile foundation joist specifically includes: the system comprises a supporting pile 1, a joist 2, a buttress type retaining wall system 3, a safety guardrail 4, a waterproof layer 5 and a catch basin 6; the buttress type retaining wall system 3 comprises a bottom plate 3.1, a vertical plate 3.2, a buttress arm 3.3, an anchor rod 3.4 and a plurality of water drainage holes 3.5.
The supporting piles 1 are positioned at the slope toe of the side slope and vertically arranged at equal intervals in the longitudinal direction; the joist 2 is horizontally positioned between the upper part of the supporting pile 1 and the lower part of the buttress type retaining wall system 3, and the top end of the supporting pile 1 extends into the joist 2 for a certain length; the buttress type retaining wall system 3 is firmly connected with the joist 2 through a steel bar; and the upper ends of the reinforcing steel bars in the support piles 1 extend into the joist 2 by a larger length so that the support piles and the joist 2 are firmly connected.
The safety guardrail 4 is positioned above the counterfort type retaining wall system 3 and is vertically arranged in the longitudinal direction, and the lower end of the vertical rod of the safety guardrail 4 is embedded into the vertical plate 3.2 for a certain length; the waterproof layer 5 is horizontally positioned on the rear side of the vertical plate 3.2 and above the supporting arm 3.3, and the rear side of the vertical plate 3.2 is the side where the supporting arm 3.3 is located. The bottom plate 3.1 is horizontally positioned above the top end of the joist 2; the supporting arms 3.3 are vertically positioned between the bottom plate 3.1 and the vertical plate 3.2 and are longitudinally arranged at equal intervals; the supporting arm 3.3 is vertically positioned at the upper part of the bottom plate 3.1 and close to one side of the empty face; the anchor rods 3.4 are vertically positioned below the armrest arms 3.3 and at the rear edge of the bottom plate 3.1, are longitudinally arranged at equal intervals and can be arranged in one row or multiple rows, the vertical plate 3.2 is perpendicular to the bottom plate 3.1, the vertical plate 3.2 is vertically positioned at one end of the bottom plate 3.1, and the anchor rods 3.4 are arranged below the other end of the bottom plate 3.1; the water drainage holes 3.5 are horizontally and obliquely positioned in the vertical plate 3.2 wall body and are arranged at certain intervals.
The supporting piles 1, the joists 2 and the buttress retaining wall system 3 are all formed by pouring reinforced concrete, and the strength grade is not less than C30. The rod cores of the safety barrier 4 and the anchor rod 3.4 are subjected to anti-corrosion treatment. In this embodiment, all the concrete of the support piles 1, the joists 2 and the buttress retaining wall system 3 are C30.
The supporting piles 1 are longitudinally arranged along the slope toe of the side slope, the top elevation of each supporting pile 1 is determined according to the ground before excavation, and the bottom of each supporting pile 1 is buried in a soil layer with good engineering property to a certain depth; the supporting pile 1 is a cylinder, and the pile length is determined according to the soil layer and calculation. The diameter range of the supporting piles 1 is generally 0.8-1.2 m, and the distance range between adjacent supporting piles 1 is generally 1.3-1.7 m. In this embodiment, the diameter of the support piles 1 is 0.8 m, the distance between the support piles is 1.3 m, and the length of the pile is 6.0 m.
The size of the joist 2 is determined according to the size of the support pile 1 and the connection construction requirement between the two. The longitudinal center line of the joist 2 is coincident with the longitudinal arrangement center line of the support piles 1, the vertical section of the joist 2 is rectangular, the height range is generally 0.8-1.2 m, and the range of each side of the joist 2 transversely exceeding the diameter outer side of the support piles 1 is generally 0.1-0.2 m. In this embodiment, the joist 2 has dimensions of 1.0 m × 0.8 m.
The height of the counterfort retaining wall system 3 is determined according to engineering geological conditions, the height is generally 4.0-8.0 meters, and the counterfort retaining wall system 3 and the joist 2 are constructed simultaneously to form a whole. In this embodiment, the buttress wall system 3 has a height of 6.7 meters.
The safety barrier 4 can be made of wood, alloy, reinforced concrete and the like, and the height is generally 1.2 meters as a safety measure. The lower part of the vertical rod of the safety guardrail 4 is embedded into the vertical plate 3.2, and the rest components of the safety guardrail 4 are installed after the construction of the counterfort type retaining wall system 3 is completed. In this embodiment, the safety barrier 4 is made of alloy, and the height is 1.2 meters.
The waterproof layer 5 is layered and is formed by mechanically compacting cohesive soil, the thickness of the waterproof layer is generally 0.3-1.0 m, and the waterproof layer 5 is used as a waterproof measure. In this embodiment, the thickness of the waterproof layer 5 is 0.8 m.
The intercepting ditch 6 is positioned at the top of a slope and is in a rectangular cross section longitudinal strip arrangement, and the cross section of the intercepting ditch is generally 0.5 multiplied by 0.5-1.2 multiplied by 1.2 meters. In this embodiment, the catch basin 6 is 0.5 × 0.5 m.
As shown in fig. 3, the bottom plate 3.1 and the vertical plate 3.2 are both plate-shaped, and the thickness is generally 0.30-0.65 m; the width of the bottom plate 3.1 is generally 3.0-6.5 m; the height of the vertical plate 3.2 is generally 3.5-8.0 meters. The supporting arms 3.3 are triangular plates, the thickness is generally 0.30-0.65 m, and the distance between every two adjacent supporting arms 3.3 is generally 3.0-6.0 m; the anchor rod 3.4 is a cylinder, a consolidation body of a reinforcing steel bar and cement paste is formed through a series of processes, the diameter is generally 0.09-0.2 m, and the length is determined according to engineering geological conditions and calculation; the material of the water outlet 3.5 is a PVC pipe, the diameter of the PVC pipe is generally 0.040-0.075 m, the inclination angle of the PVC pipe is 5 degrees, the length of the PVC pipe is 0.5 m, a quincunx hole is formed in the rear half part of the PVC pipe body, and the water outlet 3.5 is used as a drainage measure. In the embodiment, the thicknesses of the bottom plate 3.1, the vertical plate 3.2 and the supporting arms 3.3 are all 0.35 meter, the width of the bottom plate 3.1 is 3.65 meters, the height of the vertical plate 3.2 is 6.7 meters, and the distance between every two adjacent supporting arms 3.3 is 3.5 meters; the diameter of the anchor rod 3.4 is 0.12 meter, and the length is 6.0 meters; the diameter of the drain hole 3.5 is 0.04 meter.
The construction method of the pile foundation joist light supporting structure comprises the following steps:
and (5) construction process. The supporting pile adopts mechanical pore-forming and reinforced concrete filling pile. The joist 2, the buttress retaining wall system 3 and the intercepting and draining system are formed by a series of processes of formwork support, steel bar binding and concrete pouring. The anchor rod 3.4 is formed by a series of processes such as hole forming by an anchor rod machine, rod core embedding, grouting and the like. The method of combining machinery and manpower is adopted for digging and filling; the waterproof layer 5 is formed by compacting through a soil compactor. The anchor rod 3.4 tensioning and locking, the drain hole 3.5 placing, the safety barrier 4 installing and the anti-corrosion treatment are completed manually.
Construction process.
S1: according to a design file, a construction scheme is compiled, 1 position of a supporting pile is measured and placed, a reinforcement cage is placed after mechanical hole forming, concrete is poured, and maintenance and detection are carried out;
s2: setting temporary water intercepting and draining systems, such as waterproof membranes, water intercepting and draining ditches, water pumps and the like;
s3: mechanical excavation is carried out to provide a construction working surface of the anchor rod 3.4, and the anchor rod 3.4 material is subjected to antiseptic treatment, construction, maintenance and detection;
s4: the small machine is assisted with manual excavation, a construction working surface of the joist 2 and the buttress type retaining wall system 3 is provided, the rear edge of an earth slope is manually repaired into a step shape, the concrete at the head of the supporting pile 1 is broken, the reinforcing steel bar with the preset length is reserved, and the formwork support, the reinforcing steel bar binding and the concrete pouring of the joist 2 and the buttress type retaining wall system 3 are sequentially carried out; meanwhile, performing anticorrosion treatment, embedding a 4-upright rod and a 3.5-pipe drainage hole of the safety guardrail in advance, maintaining simultaneously, and tensioning and locking the anchor rod 3.4 when the strength is reached;
s5: backfilling the soil body of the filling area, and compacting the waterproof layer 5;
s6: and performing anticorrosive treatment and installation on the rest components of the safety barrier 4. And excavating soil bodies in the excavation area, and constructing a permanent intercepting and draining system.
The invention has the beneficial effects that:
1. the supporting structure has good stress performance, small deformation and high overall stability.
2. The supporting piles and the buttress retaining wall system both adopt supporting structures with small cross sections, the supporting structures are light in weight and low in material consumption, engineering cost can be reduced, and materials and land resources are saved.
3. The horizontal bending rigidity of the supporting structure is high, the material utilization rate is high, and the requirements of technical performance and economical efficiency are met.
4. The supporting structure has the advantages of simple process, easy construction, good safety, easy control of construction quality, short construction period and advanced technology. The supporting piles are constructed in advance, mechanical hole forming is adopted, the side slope is stable during construction, and operating personnel are safe.
5. The supporting pile and the counterfort retaining wall system have small noise and no vibration during construction, have small influence on the surrounding environment and are environment-friendly green supporting structures.
6. The supporting structure has large supporting height and wide applicability. The method is suitable for different engineering geological conditions, and is suitable for both excavation and filling combined slope or filling slope engineering with the height of 6-12 m. Can be used in slope engineering in urban and field environments.
7. The support structure is a green support structure in view of the characteristics of light weight, less material consumption, economical manufacturing cost, low dryness and land conservation, and is suitable for the current green construction trend.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a light-duty supporting construction of pile foundation joist which characterized in that: the method comprises the following steps: the supporting pile comprises a supporting pile (1), a joist (2), a buttress type retaining wall system (3), a safety guardrail (4) and a waterproof layer (5); the buttress type retaining wall system (3) comprises a bottom plate (3.1), vertical plates (3.2), a buttress arm (3.3), an anchor rod (3.4) and a plurality of water drainage holes (3.5);
the supporting piles (1) are vertically positioned at the slope toe of a side slope, the joist (2) is horizontally positioned between the supporting piles (1) and the counterfort type retaining wall system (3), the top ends of the supporting piles (1) extend into the joist (2), the safety guardrail (4) is vertically and longitudinally arranged at the top end of the counterfort type retaining wall system (3), the bottom ends of the vertical rods of the safety guardrail (4) are embedded into the vertical plates (3.2), the waterproof layer (5) is horizontally positioned at the rear side of the vertical plates (3.2) and above the counterfort (3.3), and the bottom plate (3.1) is horizontally positioned at the top end of the joist (2); the vertical plate (3.2) is vertically positioned above the bottom plate (3.1) and is close to one side of the empty surface; the supporting arm (3.3) is vertically positioned between the bottom plate (3.1) and the vertical plate (3.2), the anchor rod (3.4) is vertically positioned below the supporting arm (3.3) and at the rear edge of the bottom plate (3.1), and the water drainage hole (3.5) is horizontally and obliquely positioned in the wall body of the vertical plate (3.2).
2. The lightweight supporting structure for a pile joist as claimed in claim 1, wherein: the supporting piles (1) are cylinders, and a plurality of supporting piles (1) are longitudinally arranged at equal intervals; and/or the anchor rods (3.4) are cylinders, and a plurality of anchor rods (3.4) are longitudinally arranged at equal intervals.
3. The lightweight supporting structure for a pile joist as claimed in claim 1, wherein: the buttress type retaining wall system (3) is firmly connected with the joist (2) through steel bars.
4. The lightweight supporting structure for a pile joist as claimed in claim 1, wherein: the supporting piles (1), the joists (2) and the buttress retaining wall system (3) are all formed by pouring reinforced concrete, and the strength grade is not less than C30; and/or the buttress type retaining wall system (3) and the joist (2) are constructed at the same time to form a whole.
5. The lightweight supporting structure for a pile joist as claimed in claim 1, wherein: the safety barrier (4) is made of wood, alloy or reinforced concrete.
6. The lightweight supporting structure for a pile joist as claimed in claim 1, wherein: the vertical section of the joist (2) is rectangular, and in the transverse direction, each side of the joist (2) exceeds the diameter outer side of the support pile (1); and/or the longitudinal center line of the joist (2) is superposed with the longitudinal arrangement center line of the support pile (1).
7. The lightweight supporting structure for a pile joist as claimed in claim 1, wherein: the height of the buttress type retaining wall system (3) is 4.0-8.0 m, and the buttress type retaining wall system (3) and the joist (2) are constructed simultaneously to form a whole; and/or the waterproof layer (5) is layered and is formed by mechanically compacting cohesive soil.
8. The lightweight supporting structure for a pile joist as claimed in claim 1, wherein: the bottom plate (3.1) and the vertical plate (3.2) are both plate-shaped, and/or the supporting arms (3.3) are triangular plates, and the supporting arms (3.3) are arranged at equal intervals.
9. The lightweight supporting structure for a pile joist as claimed in claim 1, wherein: the material of outlet (3.5) is PVC pipe, and this PVC pipe's inclination is 5, and the back half plum blossom of pipe body is the trompil.
10. A method of constructing a pile joist lightweight support structure as claimed in any one of claims 1 to 9, wherein: the construction method comprises the following specific steps:
s1: according to design requirements, measuring the position of a supporting pile (1), mechanically forming a hole, then lowering a reinforcement cage, pouring concrete, maintaining and detecting;
s2: a temporary water intercepting and draining system is arranged and comprises a waterproof membrane, a water intercepting and draining ditch and a water suction pump;
s3: mechanical excavation is carried out to provide a construction working surface of the anchor rod (3.4), and the anchor rod (3.4) is subjected to antiseptic treatment, construction, maintenance and detection in sequence;
s4: the method is characterized in that manual excavation is assisted by machinery, a construction working surface of a joist (2) and a counterfort type retaining wall system (3) is provided, the rear edge of an earth slope is manually repaired into a step shape, the concrete at the head of a supporting pile (1) is broken, a reinforcing steel bar with a preset length is reserved, and formwork support, reinforcing steel bar binding and concrete pouring of the joist (2) and the counterfort type retaining wall system (3) are sequentially carried out; simultaneously performing antiseptic treatment, embedding a vertical rod and a drain hole (3.5) pipe of the safety guardrail (4), performing maintenance, and tensioning the locking anchor rod (3.4) when the strength is reached;
s5: backfilling the soil body of the filling area, and compacting the waterproof layer (5);
s6: and (3) performing antiseptic treatment and installation on other components of the safety guardrail (4), excavating soil in an excavation area, and constructing a permanent intercepting and draining system.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6048138A (en) * | 1998-10-05 | 2000-04-11 | The Reinforced Earth Company | Concealed crash wall in combination with mechanically stabilized earth construction |
| KR100799358B1 (en) * | 2007-04-10 | 2008-01-30 | 주식회사 다우컨설턴트 | Combined retaining wall and method for constructing thereof |
| CN102518147A (en) * | 2011-11-28 | 2012-06-27 | 湖南大学 | Anchoring and retaining structure for reducing support height of existing overhigh retaining wall |
| CN108277814A (en) * | 2018-04-11 | 2018-07-13 | 王凯 | Stake top counterfort wall supporting construction and construction method |
| KR101967425B1 (en) * | 2018-10-15 | 2019-04-10 | (주)효성 | Retaining wall with buttress and construction method thereof |
| CN109826206A (en) * | 2018-09-11 | 2019-05-31 | 江西基业科技有限公司 | The outer supporting construction of foundation pit |
| CN209538212U (en) * | 2018-12-14 | 2019-10-25 | 郑州大学 | A kind of anti-horizontal displacement radical combination soil-baffling structure |
| CN110644509A (en) * | 2019-11-01 | 2020-01-03 | 四川省交通勘察设计研究院有限公司 | Vertical anchoring and pulling balance weight type pile plate wall and construction method thereof |
| CN110792097A (en) * | 2019-11-28 | 2020-02-14 | 聂磊 | Prestress monitoring adjustable balance weight type combined retaining wall and construction method |
| CN210288466U (en) * | 2019-06-28 | 2020-04-10 | 中南勘察设计院集团有限公司 | Gravity type retaining wall reinforced structure |
-
2021
- 2021-06-10 CN CN202110651032.8A patent/CN113431083A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6048138A (en) * | 1998-10-05 | 2000-04-11 | The Reinforced Earth Company | Concealed crash wall in combination with mechanically stabilized earth construction |
| KR100799358B1 (en) * | 2007-04-10 | 2008-01-30 | 주식회사 다우컨설턴트 | Combined retaining wall and method for constructing thereof |
| CN102518147A (en) * | 2011-11-28 | 2012-06-27 | 湖南大学 | Anchoring and retaining structure for reducing support height of existing overhigh retaining wall |
| CN108277814A (en) * | 2018-04-11 | 2018-07-13 | 王凯 | Stake top counterfort wall supporting construction and construction method |
| CN109826206A (en) * | 2018-09-11 | 2019-05-31 | 江西基业科技有限公司 | The outer supporting construction of foundation pit |
| KR101967425B1 (en) * | 2018-10-15 | 2019-04-10 | (주)효성 | Retaining wall with buttress and construction method thereof |
| CN209538212U (en) * | 2018-12-14 | 2019-10-25 | 郑州大学 | A kind of anti-horizontal displacement radical combination soil-baffling structure |
| CN210288466U (en) * | 2019-06-28 | 2020-04-10 | 中南勘察设计院集团有限公司 | Gravity type retaining wall reinforced structure |
| CN110644509A (en) * | 2019-11-01 | 2020-01-03 | 四川省交通勘察设计研究院有限公司 | Vertical anchoring and pulling balance weight type pile plate wall and construction method thereof |
| CN110792097A (en) * | 2019-11-28 | 2020-02-14 | 聂磊 | Prestress monitoring adjustable balance weight type combined retaining wall and construction method |
Non-Patent Citations (1)
| Title |
|---|
| 范炳娟等: "《道路工程施工》", 31 August 2019, 北京理工大学出版社 * |
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Application publication date: 20210924 |