CN111235989B - Construction method of soil cutting pre-reinforcement structure - Google Patents
Construction method of soil cutting pre-reinforcement structure Download PDFInfo
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- CN111235989B CN111235989B CN202010158418.0A CN202010158418A CN111235989B CN 111235989 B CN111235989 B CN 111235989B CN 202010158418 A CN202010158418 A CN 202010158418A CN 111235989 B CN111235989 B CN 111235989B
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- precast
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- pile
- wall structure
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- 238000005520 cutting process Methods 0.000 title claims abstract description 52
- 239000002689 soil Substances 0.000 title claims abstract description 45
- 230000002787 reinforcement Effects 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 claims description 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000011150 reinforced concrete Substances 0.000 claims description 5
- 239000004567 concrete Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 238000004873 anchoring Methods 0.000 claims 1
- 210000002435 tendon Anatomy 0.000 claims 1
- 238000003825 pressing Methods 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000003014 reinforcing effect Effects 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009415 formwork Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
-
- 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
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention relates to the field of geotechnical engineering, in particular to a construction method of a soil cutting pre-reinforcement structure, wherein the reinforcement structure comprises precast piles, fixed anchor rods and a wall structure; the precast pile is used for being embedded into soil body of cutting slope toe at intervals; one end of the fixed anchor rod is anchored on the side wall of the cutting, and the other end of the fixed anchor rod is fixedly connected with the precast pile; the wall structure is connected with the cutting slope surface, and two sides of the wall structure are fixedly connected with the precast pile; the cutting slope road further comprises a drainage network, wherein the drainage network is paved between the wall structure and the cutting slope. Based on the structure, firstly, pressing precast piles into a soil foundation, then excavating soil in layers, and simultaneously constructing fixed anchor rods; the excavated soil slope is in a pre-stressed state and cannot be collapsed and damaged. The invention has reasonable structure, stable reinforcement side slope, safe and stable construction and small interference factors, and can shorten the construction period.
Description
Technical Field
The invention relates to the field of geotechnical engineering, in particular to a construction method of a soil cutting pre-reinforcement structure.
Background
When the soil cutting excavation depth is large, a retaining wall is usually required to be arranged at the toe of a slope for slope collection and reinforcement. The traditional retaining wall engineering needs to excavate a foundation pit after cutting excavation is completed, and then a wall structure is poured by a vertical mould. Because the foundation pit may be left for more than half a year due to rainfall weather or other factors after excavation, the retaining wall cannot be constructed in time.
In the actual construction process, accumulated water often occurs in the retaining wall foundation pit, the accumulated water softens the foundation, the stability of cutting slope feet is affected, and the temporary upright or abrupt slope side wall formed by excavating the foundation pit is easy to collapse and damage; when the retaining wall is constructed, the concrete of the retaining wall is solidified for a certain time to reach the design strength. Accordingly, there are a number of potential disadvantages to conventional retaining wall engineering in terms of reinforcement construction period and stability of reinforcement.
Disclosure of Invention
The invention aims at: aiming at the problems of long reinforcement construction period and easy instability in reinforcement in the prior art, the soil cutting pre-reinforcement structure and the construction method are provided, and cutting can be quickly and stably reinforced.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the soil cutting pre-reinforcement structure comprises precast piles, fixed anchor rods and a wall structure; the precast pile is used for being embedded into soil body of cutting slope toe at intervals; one end of the fixed anchor rod is anchored on the side wall of the cutting, and the other end of the fixed anchor rod is fixedly connected with the precast pile; the wall structure is connected with the cutting slope surface, and two sides of the wall structure are fixedly connected with the precast pile; the cutting slope road further comprises a drainage network, wherein the drainage network is paved between the wall structure and the cutting slope. The precast pile is a stressed bearing structure of the excavated slope body; the fixed anchor rod can enhance the bearing capacity of the precast pile, and strengthen the connection between the reinforcing structure and the cutting slope; the wall structure is used for blocking soil between the precast piles, preventing the soil from sliding and maintaining the normal operation of the cutting road; the drainage network is used for removing water seepage between the wall structure and the side slope, and guaranteeing stability of the reinforcing structure and cutting slope feet. The invention has reasonable structure, safe and stable construction and small interference factors, and can shorten the construction period.
Preferably, the bottom and the surface of the wall structure are provided with a plurality of drain holes for accelerating drainage of accumulated water drained by the drain net and reducing infiltration of soil to the bottom of the cutting slope toe.
Preferably, the precast pile comprises a pile body and a pile tip, and the pile tip is convenient for pressing the precast pile into a soil body, so that the resistance is reduced.
Further, the pile body is provided with a front anchor rod hole and a side reinforcing steel bar hole, and the front anchor rod hole is used for fixing the anchor rod to pass through, so that the construction of the fixed anchor rod is facilitated; the side reinforcing steel bar holes are used for integrally connecting the precast piles and the wall structure.
Further, the cross section of the pile body can be rectangular, circular or diamond; preferably rectangular, the stress is more stable.
Preferably, the interval between each precast pile is 3-5m; the bottom of precast pile excavates the cutting deeply at least 4m, consolidates steadily.
Preferably, the precast pile is a precast reinforced concrete structure, and is convenient to manufacture, stable in structure and good in stress performance.
Preferably, the wall structure is a pouring reinforced concrete structure, so that the wall structure is convenient to be connected with precast piles into a whole, and the wall structure is good in stress performance and high in strength.
The invention provides a construction method of a reinforced structure based on the soil cutting pre-reinforced structure, which comprises the following steps:
s1, positioning a precast pile, and embedding the precast pile into a cutting slope toe soil body to a designed elevation;
s2, excavating soil foundations outside the precast piles and between adjacent precast piles in a layered mode;
s3, constructing the layered fixed anchor rods on the precast piles;
s4, repeating the step S2 and the step S3, and constructing to the cutting elevation;
s5, paving drainage networks on the excavated slope surfaces between the adjacent precast piles;
s6, constructing a wall structure on the excavated slope, and fixedly connecting the wall structure with precast piles on two sides.
According to the invention, the cutting slope is excavated layer by layer from top to bottom, and reinforcement and protection are performed on the layer excavated slope in time. In the construction process, firstly, pressing precast piles into a soil foundation, then excavating soil in layers, and simultaneously constructing a fixed anchor rod; the excavated soil slope is in a pre-stressed state, so that the collapse damage is avoided, the soil slope is stable, and the construction is safe and rapid.
Preferably, in the construction of the wall structure in the step S6, binding a wall reinforcement cage, and casting concrete for the vertical formwork of the wall structure; wherein, the precast pile is equipped with side reinforcing bar hole, and the lateral stress muscle of wall structure is arranged in the side reinforcing bar hole. The transverse stress steel bars of the wall structure penetrate through the pile body of the precast pile, so that the wall structure and the precast pile are well connected with each other under stress, and the stress effect is good.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. the invention has reasonable and stable structure, good integrity and good reinforcement performance; meanwhile, the influence of accumulated water is small, construction interference factors are few, the quality is easy to control, and the method is economical and environment-friendly.
2. Firstly, pressing precast piles into a soil foundation, excavating soil in layers, and simultaneously constructing fixed anchor rods; the excavated soil slope is in a pre-stressed state, cannot collapse and damage, is stable, is safe, simple, convenient and quick to construct, has a short construction period and is beneficial to popularization.
Drawings
Fig. 1 is a schematic front view of a soil cutting pre-reinforcement structure.
FIG. 2 is a schematic cross-sectional view of the I-I of FIG. 1.
FIG. 3 is a schematic view of section II-II of FIG. 1.
Fig. 4 is a schematic structural view of a precast pile.
Icon: 1-precast piles; 11-pile body; 12-pile tip; 13-front anchor rod holes; 14-side rebar holes; 2-fixing the anchor rod; 3-drainage network; 4-wall structure.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
The embodiment provides a soil cutting pre-reinforcement structure, which is shown in figures 1-4 and comprises precast piles 1, fixed anchor rods 2 and a wall structure 4; the precast pile 1 is used for being embedded into a cutting slope toe soil body at intervals; one end of the fixed anchor rod 2 is anchored on the side wall of the cutting, and the other end of the fixed anchor rod is fixedly connected with the precast pile 1; the wall structure 4 is connected with the cutting slope surface, and two sides of the wall structure are fixedly connected with the precast pile 1; as shown in fig. 3, the water draining net 3 is further included, and the water draining net 3 is paved between the wall structure 4 and the cutting slope. The precast pile 1 is a stressed bearing structure of an excavated slope body; the fixed anchor rod 2 can strengthen the bearing capacity of the precast pile 1 and strengthen the connection between the reinforcing structure and the cutting slope; the wall structure 4 is used for blocking soil between the precast piles 1, preventing the soil from sliding and maintaining the normal operation of the cutting road; the drainage network 3 is used for removing water seepage between the wall structure 4 and the side slope, and guaranteeing the stability of the reinforcement structure and the cutting slope feet. The invention has reasonable structure, safe and stable construction and small interference factors, and can shorten the construction period.
As shown in fig. 1, the bottom and the surface of the wall structure 4 are provided with a plurality of drain holes for accelerating drainage of accumulated water drained by the drain net 3 and reducing infiltration of soil to the bottom of the cutting slope toe; the drain holes are arranged at intervals, the hole spacing is 1-2m, and the diameter is 0.1m. The wall structure 4 is a pouring reinforced concrete structure and is formed by casting a plate-shaped reinforcement cage in situ by a vertical mold, so that the wall structure is convenient to be connected with the precast pile 1 into a whole, and the wall structure has good stress performance and high strength.
As shown in fig. 1 and 4, the precast pile 1 comprises a pile body 11 and a pile tip 12, and the pile tip 12 is convenient for pressing the precast pile 1 into a soil body, so that the resistance is reduced; the pile body 11 is reserved with a front anchor rod hole 13 and a side reinforcing steel bar hole 14, which is beneficial to the construction of the fixed anchor rod 2 and the integral connection of the precast pile 1 and the wall structure 4; wherein, the distance between the front anchor rod holes 13 is 2-3m, and the distance between the side reinforcing steel bar holes 14 is 1-1.5m. The cross section of the pile body 11 is rectangular, and the width of the cross section is generally not less than 0.5m; the space between the precast piles 1 is 3-5m; the bottom of precast pile 1 excavates the cutting deeply at least 4m, consolidates steadily. The precast pile 1 is of a precast reinforced concrete structure, and is convenient to manufacture, stable in structure and good in stress performance.
Example 2
The present embodiment provides a construction method based on the soil cutting pre-reinforcement structure described in embodiment 1, comprising the steps of:
s1, positioning a precast pile 1, and verifying the cross section arrangement direction of the precast pile 1, namely, confirming the orientations of a front anchor rod hole 13 and a side reinforcing steel bar hole 14; and driving precast piles 1 to a designed elevation at intervals;
s2, excavating soil foundations outside the precast piles 1 and between adjacent precast piles 1 in a layered manner;
s3, constructing the layered fixed anchor rod 2 on the precast pile 1, and fixedly connecting the fixed anchor rod 2 with the precast pile 1;
s4, repeating the step S2 and the step S3, and constructing to the cutting elevation;
s5, paving drainage nets 3 on the excavated slope surfaces between the adjacent precast piles 1, and fixing the drainage nets at intervals by adopting U-shaped nails;
s6, constructing a wall structure 4 on the excavated slope, and fixedly connecting the wall structure 4 with the precast piles 1 on the two sides. In the process of constructing the wall structure 4, transverse stress ribs of the wall structure 4 are put into the side steel bar holes 14 of the precast pile 1 in a pulling mode, then the plate type wall steel bar cage is bound, concrete is poured for the wall structure 4 in a vertical mould, and PVC pipes are embedded at the positions where the drain holes are formed. The transverse stress steel bars of the wall structure 4 penetrate through the pile body of the precast pile 1, so that the wall structure 4 and the precast pile 1 are well connected in a stress manner, and the stress effect is good.
In this embodiment, when the reinforcement structure described in structural embodiment 1 is constructed, the cutting slope is excavated from top to bottom in layers, and the slope surface is reinforced and protected in time by the layer excavation. In the construction process, firstly, a precast pile 1 is pressed into a soil foundation, soil is excavated in layers, and meanwhile, a fixed anchor rod 2 is constructed; the excavated soil slope is in a pre-stressed state, so that the collapse damage is avoided, the soil slope is stable, and the construction is safe and rapid.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. The construction method of the soil cutting pre-reinforcement structure is characterized by comprising the following steps of:
s1, positioning a precast pile (1), embedding the precast pile (1) into a cutting slope toe soil body at intervals to a designed elevation, wherein the precast pile (1) is of a precast reinforced concrete structure, a front anchor rod hole (13) is formed in the front of the precast pile (1), and a side reinforcing steel bar hole (14) is formed in the side face of the precast pile (1);
s2, excavating soil foundations outside the precast piles (1) and between adjacent precast piles (1) in a layered mode;
s3, constructing the layered fixed anchor rod (2) on the precast pile (1), wherein one end of the fixed anchor rod (2) penetrates through the front anchoring hole (13) and is anchored with the cutting side wall, and the other end of the fixed anchor rod is fixedly connected with the precast pile (1);
s4, repeating the step S2 and the step S3, and constructing to the cutting elevation;
s5, paving drainage networks (3) on the excavated slope surfaces between the adjacent precast piles (1);
s6, constructing a wall structure (4) on the excavated slope surface: and (3) pulling the transverse stressed tendons of the wall structure (4) to penetrate into the side steel bar holes (14), binding the wall steel bar cages, casting concrete for the vertical mould of the wall structure (4), and fixedly connecting the wall structure (4) with the precast piles (1) at two sides.
2. The method for constructing a soil cutting pre-reinforcement structure according to claim 1, wherein the bottom and the surface of the wall structure (4) are provided with a plurality of drain holes.
3. The method for constructing a soil cutting pre-reinforcement structure according to claim 1, wherein the precast pile (1) comprises a pile body (11) and a pile tip (12).
4. A method of constructing a soil cutting pre-reinforcement structure according to claim 3, wherein the pile body (11) has a rectangular, circular or diamond cross section.
5. The method for constructing an earth cutting pre-reinforcement structure according to any one of claims 1 to 4, wherein the spacing between the precast piles (1) is 3 to 5m; the bottom of the precast pile (1) is deeply excavated for cutting by at least 4m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010158418.0A CN111235989B (en) | 2020-03-09 | 2020-03-09 | Construction method of soil cutting pre-reinforcement structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010158418.0A CN111235989B (en) | 2020-03-09 | 2020-03-09 | Construction method of soil cutting pre-reinforcement structure |
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| CN111235989A CN111235989A (en) | 2020-06-05 |
| CN111235989B true CN111235989B (en) | 2024-03-12 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090013554A (en) * | 2007-08-02 | 2009-02-05 | 주식회사 스마텍엔지니어링 | Constructing method of top-down type retaining wall |
| CN103243724A (en) * | 2013-05-22 | 2013-08-14 | 中铁二院工程集团有限责任公司 | Bedding cutting high slope closing reinforcement structure |
| CN105649009A (en) * | 2016-03-08 | 2016-06-08 | 同济大学 | Rigid precast concrete pile with drainability |
| CN205617353U (en) * | 2016-04-13 | 2016-10-05 | 西京学院 | Miniature compound soil nail wall that intercepts water by force |
| CN205662920U (en) * | 2016-06-08 | 2016-10-26 | 四川省建筑科学研究院 | Take secret assembled precast pile in anchor rope hole |
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| CN211815254U (en) * | 2020-03-09 | 2020-10-30 | 中铁二院工程集团有限责任公司 | Soil cutting pre-reinforcing structure |
-
2020
- 2020-03-09 CN CN202010158418.0A patent/CN111235989B/en active Active
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| CN105649009A (en) * | 2016-03-08 | 2016-06-08 | 同济大学 | Rigid precast concrete pile with drainability |
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