CN113308955A - Construction method of cast-in-place concrete full-protection foam light soil wide-spliced embankment - Google Patents
Construction method of cast-in-place concrete full-protection foam light soil wide-spliced embankment Download PDFInfo
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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
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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
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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
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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
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- 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
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Abstract
The invention relates to a construction method of a cast-in-place concrete full-protection foam light soil wide-spliced embankment, which comprises the steps of slope clearing excavation and construction of a reinforced concrete base layer with piles, then reinforced concrete retaining wall construction, pouring construction of foam light soil, construction of a thermal stress release hole, and finally construction of a cast-in-place concrete pouring layer and a new pavement layer, so that the construction of the cast-in-place concrete full-protection foam light soil wide-spliced embankment is completed. The invention has the beneficial effects that: the reinforced concrete dado provided by the invention has the advantages that the vertical structure is simple and practical, the land occupation is small, the safety and the stability are realized, and the technical and economic benefits are obvious; according to the invention, the reinforced concrete base layer with the anti-slide pile and the drainage ditch structure is adopted, the anti-slide pile greatly improves the bearing capacity of the base, and meanwhile, the drainage ditch structure can drain water and can be used as an extended foundation, so that the upper load can be dispersed, and the pressure of the base can be reduced.
Description
Technical Field
The invention relates to the technical field of road engineering construction, in particular to a construction method of a cast-in-place concrete full-protection foam light soil wide-spliced embankment.
Background
The economy of China is entering the stages of industrialization, informatization and leap development, the economy is rapidly developed, and convenient, rapid and safe traffic service is needed. The highway construction is an important component of main traffic facilities in China, the quality of the highway construction is closely related to the life and work of people, and the highway construction has important connection to the social progress and the economic development. With the gradual improvement of the living standard of people, private cars have become transportation tools essential for the life of people. In addition, due to the rapid development of economy, the logistics in various regions are busy, and various trucks are crowded in the road traffic line. In order to meet the requirement of traffic volume increase, widening and reconstruction of the existing highway is necessary, particularly, the land resources of the country are relatively lack, and compared with the reconstructed highway, widening the old road bed can fully utilize the original road bed, shorten the construction period and occupy less construction land.
The foamed light soil is a new type light filler developed in the field of civil engineering in recent years, and is a porous light material prepared by mixing cement, water and additives according to a certain proportion, and through on-site pumping and pouring, forming and hardening. The main engineering characteristics are small volume weight, adjustable strength and volume weight in a certain range according to requirements, good construction performance, capability of standing after curing, low permeability and water absorption, small heat conductivity coefficient, same durability as a cement concrete material and the like; and has no post-construction settlement, and is especially used for splicing wide road sections. Foam light soil is also adopted in the widening construction of a plurality of roads in the prior construction, so that the differential settlement of new and old embankments can be eliminated to a certain extent. But still have the dyke base bearing capacity of piecing together wide embankment not enough and appear subsiding, and the foam light soil that pours inside because temperature variation easily produces stress deformation to influence the quality of piecing together wide embankment.
Therefore, the construction method of the cast-in-place concrete full-protection foam light soil wide embankment which is reasonable in structure, safe, stable, capable of effectively improving bearing capacity and eliminating temperature deformation is needed to be found out very importantly at present.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a construction method of a cast-in-place concrete full-protection foam light soil wide-spliced embankment.
The cast-in-place concrete full-protection foam light soil wide-spliced embankment comprises a guardrail base, connecting ribs, a cast-in-place concrete pouring layer, a new pavement layer, a horizontal anchor rod, an original pavement layer, an original embankment, a reinforced concrete retaining wall, a thermal stress release hole, a water drain hole, a drainage ditch, a reinforced concrete base layer, a plain concrete cushion layer, a gravel cushion layer, an anti-slide pile, a support, an inclined pull rod, geotextile, a water stop layer, a foam light soil pouring area, a vertical reinforcing rib, a longitudinal reinforcing rib, a gravel layer and a release hole opening, wherein the guardrail base is arranged at the top end of the reinforced concrete retaining wall, the reinforced concrete retaining wall is arranged on the reinforced concrete base layer, the plain concrete cushion layer is arranged below the plain concrete cushion layer, the gravel cushion layer is arranged below the gravel cushion layer, the anti-slide reinforcing rib is arranged below the gravel cushion layer, the drainage ditch is arranged in the reinforced concrete base layer outside the reinforced concrete retaining wall, the vertical reinforcing rib and the longitudinal reinforcing rib are arranged inside the reinforced concrete retaining wall, the opening of the release hole is arranged on the reinforced concrete retaining wall, the foam lightweight soil pouring area is provided with a thermal stress release hole, the support is arranged at the intersection of the vertical reinforcing rib and the longitudinal reinforcing rib and on the corresponding reinforced concrete base layer, the inclined pull rod is arranged between the supports, the water drainage hole is arranged at the joint of the reinforced concrete retaining wall and the reinforced concrete base layer, the gravel layer is arranged on the reinforced concrete base layer at the inner side of the reinforced concrete retaining wall, the water stop layer is arranged on the slope of the original embankment, the geotextile is arranged above the gravel layer and the water stop layer, the foam lightweight soil pouring area is arranged above the geotextile, the cast-in-situ concrete pouring layer is arranged above the foam lightweight soil pouring area, the cast-in-situ concrete pouring layer is connected with the upper part of the reinforced concrete retaining wall through a connecting rib, and horizontal anchor rods are arranged among the reinforced concrete base layer, the foam lightweight soil pouring area, the cast-in-situ concrete pouring layer and the original embankment, the new pavement layer is arranged above the cast-in-place concrete pouring layer and is connected with the original pavement layer above the original embankment in equal height.
Preferably, the method comprises the following steps: the thermal stress release holes are arranged according to an inclined downward inclination angle, and the positions of the thermal stress release holes correspond to the openings of the release holes.
Preferably, the method comprises the following steps: the left upper part of the reinforced concrete base layer is provided with a notch to form a drainage ditch, and the right lower part of the reinforced concrete base layer is provided with a notch to form step-shaped conjunction with the original embankment.
The construction method of the cast-in-place concrete full-protection foam light soil wide-spliced embankment comprises the following steps:
1) after the slope of the original embankment is cleared, steps are excavated on a base, a horizontal anchor rod is arranged, a reinforced concrete slide-resistant pile is constructed and arranged at the corresponding base to the designed depth, then a sandstone cushion layer and a plain concrete cushion layer are sequentially paved on the upper part of the slide-resistant pile, reinforcing steel bars of a reinforced concrete base layer are arranged on the plain concrete cushion layer and are well lapped with the horizontal anchor rod and reinforcing steel bars at the top of the slide-resistant pile, finally a template is arranged, and concrete is poured to form the reinforced concrete base layer with a pile foundation;
2) lapping reinforcing steel bars on a reinforced concrete base layer to carry out reinforcement arrangement of the reinforced concrete retaining wall, the vertical reinforcing ribs and the longitudinal reinforcing ribs, erecting a template, pre-burying a guardrail base and connecting ribs, reserving openings of water drain holes and release holes at intervals, then pouring concrete to form the reinforced concrete retaining wall, finally respectively installing supports at the intersection parts of the vertical reinforcing ribs and the longitudinal reinforcing ribs and on the corresponding reinforced concrete base layer, and then installing inclined pull rods on the supports; wherein the vertical reinforcing rib and the longitudinal reinforcing rib are arranged on the inner side of the reinforced concrete retaining wall;
3) constructing and paving a waterproof layer on the side slope of the original embankment, paving and filling a rubble layer on a reinforced concrete base layer on the inner side of the reinforced concrete retaining wall, paving geotextile on the rubble layer and the waterproof layer, connecting one end of the geotextile with the reinforced concrete retaining wall in a sealing way, embedding the other end of the geotextile into the original embankment to form a foam lightweight soil pouring area, then drilling a horizontal anchor rod on the upper part of the original embankment, and finally performing pouring construction on the foam lightweight soil pouring area;
4) construction of thermal stress release holes: selecting proper closed steel pipes and sealing bags, coating lubricating oil on the inner side and the outer side of the sealing bags, inserting the closed steel pipes into the foam lightweight soil which is just poured through openings of release holes, pulling out the closed steel pipes after the foam lightweight soil is initially set to form thermal stress release holes, and finally backfilling concrete into the holes for sealing after the foam lightweight soil is deformed stably;
5) and (3) arranging a horizontal anchor rod on the original embankment above the foam lightweight soil pouring area, then laying reinforcing steel bars above the poured foam lightweight soil, overlapping the reinforcing steel bars with connecting ribs of a reinforced concrete retaining wall, pouring concrete to form a cast-in-place concrete pouring layer, and finally constructing a new embankment layer above the cast-in-place concrete pouring layer, overlapping the new embankment layer with the original embankment layer at the same height, and finishing the construction of splicing the wide embankment by the cast-in-place concrete full-protection foam lightweight soil.
The invention has the beneficial effects that:
1. compared with the prior art, the reinforced concrete retaining wall provided by the invention has the advantages of simple and practical vertical structure, less land occupation, safety, stability and obvious technical and economic benefit advantages.
2. According to the invention, the reinforced concrete base layer with the anti-slide pile and the drainage ditch structure is adopted, the anti-slide pile greatly improves the bearing capacity of the base, and meanwhile, the drainage ditch structure can drain water and can be used as an extended foundation, so that the upper load can be dispersed, and the pressure of the base can be reduced.
3. The thermal stress release hole is simple in construction, internal temperature deformation of the foamed light soil is effectively eliminated, and the consistency of the upper lower part structures of the new and old embankments is guaranteed.
Drawings
FIG. 1 is a schematic diagram of construction layout of a cast-in-place concrete full-protection foam light soil wide-spliced embankment;
FIG. 2 is a schematic cross-sectional view of a reinforced concrete base layer;
FIG. 3 is a schematic cross-sectional view of a reinforced concrete retaining wall;
FIG. 4 is a front view of the inside of a reinforced concrete retaining wall;
FIG. 5 is a schematic layout of a foam light soil casting area;
FIG. 6 is a schematic view of the arrangement of thermal stress relief holes;
fig. 7 is a completion schematic diagram of the cast-in-place concrete full-protection foam light soil wide embankment.
Description of reference numerals: 1-guardrail base; 2-connecting bar; 3-casting a concrete pouring layer in situ; 4-new pavement layer; 5, horizontally anchoring the bolt; 6-original pavement layer; 7-original embankment; 8-reinforced concrete dado; 9-thermal stress relief holes; 10-water drainage hole; 11-drainage holes; 12-reinforced concrete base course; 13-plain concrete cushion layer; 14-sandstone cushion layer; 15-slide-resistant pile; 16-support; 17-oblique pull rod; 18-geotextile; 19-water stopping layer; 20-foam light soil pouring area; 21-vertical reinforcing rib; 22-longitudinal reinforcing ribs; 23-a crushed stone layer; 24-Release hole opening.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Example one
The cast-in-place concrete full-protection foam light soil wide-spliced embankment comprises a guardrail base 1, connecting ribs 2, a cast-in-place concrete pouring layer 3, a new pavement layer 4, horizontal anchor rods 5, an original pavement layer 6, an original embankment 7, a reinforced concrete retaining wall 8, a thermal stress release hole 9, a drainage hole 10, a drainage ditch 11, a reinforced concrete base layer 12, a plain concrete cushion layer 13, a gravel cushion layer 14, an anti-slide pile 15, a support 16, an inclined pull rod 17, geotextile 18, a water stop layer 19, a foam light soil pouring area 20, a vertical reinforcing rib 21, a longitudinal reinforcing rib 22, a gravel layer 23 and a release hole opening 24, wherein the guardrail base 1 is arranged at the top end of the reinforced concrete retaining wall 8, the concrete reinforced concrete retaining wall 8 is arranged on the concrete reinforced concrete base layer 12, the plain concrete cushion layer 13 is arranged below the reinforced concrete base layer 12, the gravel cushion layer 14 is arranged below the plain concrete cushion layer 13, the anti-slide pile 15 is arranged below the gravel cushion layer 14, the drainage ditch 11 is arranged in a reinforced concrete base layer 12 on the outer side of a reinforced concrete retaining wall 8, the vertical reinforcing rib 21 and the longitudinal reinforcing rib 22 are arranged on the inner side of the reinforced concrete retaining wall 8, the release hole opening 24 is arranged on the reinforced concrete retaining wall 8, a thermal stress release hole 9 is arranged in a foam light-weight soil pouring area 20 through the release hole opening 24, the support 16 is arranged at the intersection of the vertical reinforcing rib 21 and the longitudinal reinforcing rib 22 and on the corresponding reinforced concrete base layer 12, the inclined pull rod 17 is arranged between the supports 16, the drainage hole 10 is arranged at the connection of the reinforced concrete retaining wall 8 and the reinforced concrete base layer 12, the gravel layer 23 is arranged on the reinforced concrete base layer 12 on the inner side of the reinforced concrete retaining wall 8, the water stop layer 19 is arranged on the side slope of the original embankment 7, the geotextile 18 is arranged above the gravel layer 23 and the water stop layer 19, the foam light-weight soil pouring area 20 is arranged above the geotextile 18, the cast-in-place concrete pouring layer 3 is arranged above the foam lightweight soil pouring area 20 and is connected with the upper part of the reinforced concrete retaining wall 8 through the connecting ribs 2, horizontal anchor rods 5 are arranged among the reinforced concrete base layer 12, the foam lightweight soil pouring area 20, the cast-in-place concrete pouring layer 3 and the original embankment 7, and the new pavement layer 4 is arranged above the cast-in-place concrete pouring layer 3 and is connected with the original pavement layer 6 in an equal height mode.
The thermal stress release holes 9 are arranged according to an inclined downward inclination angle, the positions of the thermal stress release holes 9 correspond to the release hole openings 24, sealing bags are sleeved on the outer sides of the closed steel pipes, the closed steel pipes are inserted into the light soil which is just poured through the release hole openings 24, the closed steel pipes are pulled out after the light soil is initially solidified, and the thermal stress release holes 9 are formed.
The left upper part of the reinforced concrete base layer 12 is provided with a notch to form a drainage ditch 11, and the right lower part is provided with a notch to form step-shaped conjunction with the original embankment 7.
Example two
The construction method of the cast-in-place concrete full-protection foam light soil wide-spliced embankment comprises the steps of slope clearing excavation and construction of a reinforced concrete base layer with piles, then reinforced concrete retaining wall construction, pouring construction of foam light soil, construction of a thermal stress release hole, and finally construction of a cast-in-place concrete pouring layer and a new pavement layer, so that the construction of the cast-in-place concrete full-protection foam light soil wide-spliced embankment is completed. The method specifically comprises the following steps:
1) as shown in fig. 2, after the slope of the original embankment 7 is cleared, a step is excavated on a base to form a step and a horizontal anchor rod 5 is driven, the size of the step is determined according to the field construction condition, then an anti-slide pile 15 made of reinforced concrete is driven to a designed depth, then a sandstone cushion layer 14 and a plain concrete cushion layer 13 are sequentially laid on the upper part of the anti-slide pile 15, reinforcement of a reinforced concrete base layer 12 is arranged on the plain concrete cushion layer 13 according to the design requirement, the reinforcement is well lapped with the horizontal anchor rod 5 and a top steel bar of the anti-slide pile 15, and finally a template is erected, and concrete is poured to form the reinforced concrete base layer 12 with a pile foundation;
2) as shown in fig. 3 and 4, the reinforced concrete base layer 12 is overlapped with the steel bars to reinforce the reinforced concrete retaining wall 8, the vertical reinforcing rib 21 and the longitudinal reinforcing rib 22, a template is erected, the guardrail base 1, the connecting ribs 2, the drainage holes 10 reserved at intervals and the release hole openings 24 reserved at intervals are pre-embedded, then concrete is poured to form the reinforced concrete retaining wall 8, finally the supports 16 are respectively installed at the intersection of the reinforcing ribs and the corresponding reinforced concrete base layer 12, and then the inclined pull rod 17 is installed on the supports 16;
3) as shown in fig. 5, a water stopping layer 19 is constructed and laid on the side slope of the original embankment 7, then a gravel layer 23 is laid and filled on the reinforced concrete base layer 12 on the inner side of the reinforced concrete retaining wall 8, then geotextile 18 is laid on the gravel layer 23 and the water stopping layer 19, one end of the geotextile 18 is hermetically connected with the reinforced concrete retaining wall 8, the other end is embedded into the original embankment 7 to form a foam lightweight soil pouring area 20, then a horizontal anchor rod 5 is arranged on the upper part of the original embankment 7, and finally pouring construction is carried out on the foam lightweight soil pouring area 20
4) As shown in fig. 6, the construction of the thermal stress relief hole 9: selecting proper closed steel pipes and sealing bags, coating lubricating oil on the inner side and the outer side of the sealing bags, inserting the closed steel pipes into the foam lightweight soil which is just poured through the openings 24 of the release holes, pulling out the closed steel pipes after the foam lightweight soil is initially solidified to form thermal stress release holes 9, and finally backfilling concrete in the holes for sealing after the foam lightweight soil is deformed stably;
5) as shown in fig. 7, the original embankment 7 above the foam lightweight soil pouring area 20 is drilled with the horizontal anchor rods 5, then the steel bars are laid above the poured foam lightweight soil and are well overlapped with the connecting bars 2 of the reinforced concrete retaining wall 8, then the concrete is poured to form the cast-in-place concrete pouring layer 3, finally the new embankment layer 4 is constructed above the cast-in-place concrete pouring layer 3 and is overlapped with the original embankment layer 6 above the original embankment 7 in the same height, and the construction of the cast-in-place concrete full-protection foam lightweight soil wide embankment is completed.
Claims (1)
1. A construction method of a cast-in-place concrete full-protection foam light soil wide-spliced embankment is characterized by comprising the following steps:
1) after slope clearing is carried out on the side slope of the original embankment (7), steps are excavated on a base to form steps, a horizontal anchor rod (5) is arranged, then a reinforced concrete slide-resistant pile (15) is constructed and arranged at the corresponding base to the designed depth, then a sandstone cushion layer (14) and a plain concrete cushion layer (13) are sequentially laid on the upper part of the slide-resistant pile (15), reinforcement of a reinforced concrete base layer (12) is arranged on the plain concrete cushion layer (13), the reinforcement is well lapped with the horizontal anchor rod (5) and a steel bar at the top of the slide-resistant pile (15), finally a template is erected, and concrete is poured to form the reinforced concrete base layer (12) with a pile foundation;
2) lapping reinforcing steel bars on a reinforced concrete base layer (12) to carry out reinforcement arrangement on the reinforced concrete retaining wall (8), the vertical reinforcing rib (21) and the longitudinal reinforcing rib (22), erecting a template, pre-burying a guardrail base (1) and a connecting rib (2), reserving drain holes (10) and release hole openings (24) at intervals, then pouring concrete to form the reinforced concrete retaining wall (8), finally installing supports (16) at the intersection of the vertical reinforcing rib (21) and the longitudinal reinforcing rib (22) and on the corresponding reinforced concrete base layer (12) respectively, and then installing an inclined pull rod (17) on the supports (16); wherein the vertical reinforcing rib (21) and the longitudinal reinforcing rib (22) are arranged on the inner side of the reinforced concrete retaining wall (8);
3) constructing and paving a water stopping layer (19) on the side slope of the original embankment (7), then paving and filling a gravel layer (23) on a reinforced concrete base layer (12) on the inner side of a reinforced concrete retaining wall (8), then paving geotextile (18) on the gravel layer (23) and the water stopping layer (19), connecting one end of the geotextile (18) with the reinforced concrete retaining wall (8) in a sealing way, embedding the other end of the geotextile into the original embankment (7) to form a foam lightweight soil pouring area (20), then paving a horizontal anchor rod (5) on the upper part of the original embankment (7), and finally pouring construction is carried out on the foam lightweight soil pouring area (20);
4) construction of the thermal stress relief hole (9): selecting a proper closed steel pipe and a proper sealing bag, brushing lubricating oil on the inner side and the outer side of the sealing bag, inserting the closed steel pipe into the sealing bag, then inserting the closed steel pipe into the foam lightweight soil which is just poured through an opening (24) of a release hole, pulling out the closed steel pipe after the foam lightweight soil is initially solidified to form a thermal stress release hole (9), and finally backfilling concrete into the hole for sealing after the foam lightweight soil is deformed stably;
5) the construction method comprises the steps of constructing an original embankment (7) above a foam light soil pouring area (20) with a horizontal anchor rod (5), then paving reinforcing steel bars above the poured foam light soil, well lapping the reinforcing steel bars with connecting ribs (2) of a reinforced concrete retaining wall (8), then pouring concrete to form a cast-in-place concrete pouring layer (3), and finally constructing a new pavement layer (4) above the cast-in-place concrete pouring layer (3) to be lapped with the original pavement layer (6) at the same height, so that the construction of the cast-in-place concrete full-protection foam light soil wide-spliced embankment is completed.
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| CN114481734A (en) * | 2022-02-24 | 2022-05-13 | 浙江交工金筑交通建设有限公司 | Construction method of highway widened pile drainage type foam concrete light embankment |
| CN114575209A (en) * | 2022-03-31 | 2022-06-03 | 浙江数智交院科技股份有限公司 | Road rigid pile and preloading soft foundation treatment transition structure and construction method |
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