阅读说明：本技术 陡峭山地轻质路堤结构的施工方法 (Construction method of light embankment structure on steep mountain land ) 是由 王新泉 刁红国 崔允亮 魏纲 于威 齐昌广 于 2021-06-21 设计创作，主要内容包括：本发明涉及陡峭山地轻质路堤结构的施工方法,包括步骤：1)在陡峭山地施工区确定抗滑桩和基础桩的位置；2)在冠梁顶部搭接绑扎侧板配筋,然后进行现浇侧板抱箍柱拉结支模体系施工；3)分层浇筑现浇侧板混凝土；4)施工内侧横向钢梁和外侧横向钢梁；5)在冠梁内侧面先铺设加筋网；6)将提前制作好的预制减载板分块吊起安装在钢梁上；7)在下部隔水层上方浇筑上部泡沫混凝土层至设计高度。本发明的有益效果是：本发明中采用在横向钢梁上设置预制减载板对泡沫混凝土回填区进行分层减载回填,保证回填质量,且减载板提前预制,吊装方便,大大提高施工速度,技术效益优势明显。(The invention relates to a construction method of a light embankment structure on a steep mountain land, which comprises the following steps: 1) determining the positions of an anti-slide pile and a foundation pile in a steep mountain construction area; 2) side plate reinforcing bars are lapped and bound on the top of the crown beam, and then cast-in-place side plate hoop column tie formwork support system construction is carried out; 3) pouring cast-in-place side plate concrete in layers; 4) constructing an inner lateral steel beam and an outer lateral steel beam; 5) firstly, laying a reinforced net on the inner side surface of the crown beam; 6) hoisting and installing the prefabricated load-reducing plate which is manufactured in advance on a steel beam in blocks; 7) and pouring an upper foam concrete layer above the lower waterproof layer to a designed height. The invention has the beneficial effects that: according to the invention, the prefabricated load reduction plate is arranged on the transverse steel beam to carry out layered load reduction backfilling on the foam concrete backfilling area, so that the backfilling quality is ensured, the load reduction plate is prefabricated in advance, the hoisting is convenient, the construction speed is greatly improved, and the technical benefit advantage is obvious.)

1. A construction method of a light embankment structure on a steep mountain land is characterized by comprising the following steps:

1) according to measurement and setting-out, determining the positions of an anti-slide pile (25) and a foundation pile (28) in a construction area of a steep mountain land (16), drilling a hole to construct the foundation pile (28), overlapping and binding a steel bar of a top beam (12) at the top of the foundation pile (28), pre-burying a drain pipe (13) and a foundation bolt (38) at corresponding positions, pouring concrete to form the top beam (12), simultaneously performing integrated pouring construction of the anti-slide pile (25) and a support column (24), and pre-burying and installing a steel beam fixing rib (7) at the top of the support column (24);

2) and (3) lapping and binding side plate reinforcing bars (34) at the top of the crown beam (12), and then carrying out cast-in-place side plate hoop column tie formwork system construction: manufacturing hoop columns (31) in advance, welding a chassis (37) with bolt holes at the bottoms of the hoop columns (31), fixing the chassis (37) on the two sides of a side plate reinforcement (34) through foundation bolts (38), selecting a combined steel formwork, gradually installing formworks (32), simultaneously gradually installing hoops (33) on the hoop columns (31) through fixing bolts (36), attaching the formworks (32) to connecting hoops (41) on the hoops (33), fixedly bolting through the connecting bolts (35), gradually installing the formworks (32) to a designed height, finally installing split bolts (29) at the tops of the hoop columns (31) on the two sides, and adjusting the distance between the formworks (32) on the two sides to the designed width of a cast-in-place side plate (11);

3) pouring concrete of a cast-in-place side plate (11) in a layered mode, reserving a drain hole (5) at a corresponding position, reserving a corbel (8) connecting rib at a position corresponding to a support column (24), embedding and installing a base connecting rib (2) of an anti-collision guardrail (1) at the top of the cast-in-place side plate (11), dismantling a template after maintenance is completed, binding reinforcing steel bars of the corbel (8) in an overlapping mode, embedding and installing a steel beam fixing rib (7) at the top of the corbel (8), and then pouring concrete to form the corbel (8) with the same height as the support column (24);

4) horizontal hole opening construction is carried out at the equal heights of a steep mountain land (16) and a support column (24), then an inner side transverse steel beam (21) is hoisted, one end of the inner side transverse steel beam is inserted into a hole body, the other end of the inner side transverse steel beam is installed at the top of the support column (24) through a steel beam fixing rib (7), an outer side transverse steel beam (6) is hoisted at the same time, the steel beam fixing rib (7) is respectively installed at the tops of a bracket (8) and the support column (24), transverse welding is carried out between the outer side transverse steel beam (6) and the inner side transverse steel beam (21) firmly, mortar is finally poured into the horizontal hole opening, and a mortar filling layer (22) is formed between the inner side transverse steel beam (21) and a mountain body;

5) firstly, a reinforced net is laid on the inner side surface of a crown beam (12), anchoring is carried out, then, a reversed filter geotextile is adhered to the reinforced net to form a composite layer (42), a pebble layer (27) is backfilled, then, a non-woven geotextile (26) is laid on the pebble layer (27), additionally, inserting ribs (9) are installed on a cast-in-place side plate (11) and a steep mountain land (16) section below an outer transverse steel beam (6) and an inner transverse steel beam (21) at equal intervals, meanwhile, inserting ribs (9) are welded at the bottoms of the outer transverse steel beam (6) and the inner transverse steel beam (21), then, a fixed hanging net (10) is installed on the inserting ribs (9), and finally, a lower foam concrete layer (23) is poured above the non-woven geotextile (26) to a height equal to the steel beam;

6) hoisting prefabricated load-reducing plates (20) which are manufactured in advance in blocks and installing the prefabricated load-reducing plates on steel beams, making mortar joints between every two prefabricated load-reducing plates (20), paving and constructing a lower water-resisting layer (19) above the prefabricated load-reducing plates (20), paving and constructing a side water-resisting layer (17) on the surface of a steep mountain land (16), then placing a through long gravel sand bag (4) at the junction of the lower water-resisting layer (19) and a cast-in-place side plate (11), communicating water drain holes (5), and installing a vertical water drain pipe (3) above the gravel sand bag (4);

7) pour upper portion foam concrete layer (18) to design height in lower marine barrier (19) top, and make upper portion foam concrete layer (18) surface have certain outside gradient, then at upper portion foam concrete layer (18) surface pavement upper portion marine barrier (15), execute again and do permeable pavement layer (14) above upper portion marine barrier (15), at last at cast-in-place curb plate (11) top through base connector (2) installation ligature anticollision barrier (1) reinforcing bar, concreting forms anticollision barrier (1), accomplish the construction of precipitous mountain region light embankment structure.

Technical Field

The invention belongs to the technical field of road construction, and relates to a construction method of a light embankment structure on a steep mountain land.

Background

With the development of economic construction and society of China, the construction of traffic infrastructure is further accelerated, and the construction of roads gradually develops to mountainous areas. The mountain road is used as a hub, and can drive local economy. The construction of highway engineering in mountain areas is influenced by natural conditions such as complex geological environment and climatic conditions in mountain areas, the construction of highway in mountain areas is different from that of highway in plain areas, and the difficulty of route design and construction is high.

China has complex geology, roads in steep mountain areas have more roadbed, high filling and deep digging, easy landslide and collapse and the like, and the construction cost and the maintenance cost are higher. The foam concrete has the material characteristics of heat preservation, heat insulation, fire resistance, good freezing resistance and the like due to light weight and multiple pores, has good physical and mechanical properties, and is a good building energy-saving material. The mixed slurry can automatically level and compact during molding; the construction workability is good, the pumping and leveling are facilitated, the building material has good compatibility with other building materials, and the strength can be adjusted according to requirements. Therefore, the method is commonly used for roadbed filling of steep road sections in mountainous areas, and avoids the construction technical problem caused by high filling height excavation.

Therefore, it is important to find a construction method of a light embankment structure in steep mountainous areas, which has a reasonable and stable structure, effectively lightens loads, and has a high construction speed.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a construction method of a light embankment structure on a steep mountain land.

The lightweight embankment structure for the steep mountain land comprises gravel sand bags, outer lateral steel beams, dowel bars, a hanging net, cast-in-place side plates, crown beams, an upper foamed concrete layer, a prefabricated load-reducing plate, inner lateral steel beams, a lower foamed concrete layer, support columns, anti-slide piles, foundation piles and composite layers, wherein the anti-slide piles and the foundation piles are arranged in the steep mountain land, the crown beams are arranged above the foundation piles, the cast-in-place side plates are arranged above the crown beams, the support columns are arranged above the anti-slide piles, corbels are arranged at equal heights of the cast-in-place side plates and the support columns, steel beam fixing ribs are arranged at the tops of the corbels and the support columns, one ends of the outer lateral steel beams are arranged on the corbels, the other ends of the outer lateral steel beams are arranged at the tops of the support columns, the other ends of the inner lateral steel beams are arranged in the steep mountain land, pebble layers are arranged on the inner sides of the crown beams, and composite layers are arranged on the contact surfaces of the pebble layers and the inner sides of the crown beams, the drainage pipe is arranged in the crown beam and communicated with the pebble layer, the dowel bars are respectively arranged at the bottom of the inner side transverse steel beam, the outer side transverse steel beam and the inner side transverse steel beam of the cast-in-place side plate and on the steep hill, the net is arranged on the dowel bars, the prefabricated relief plate is respectively arranged at the top of the outer side transverse steel beam and the inner side transverse steel beam, the lower foam concrete layer is arranged between the prefabricated relief plate and the pebble layer, the lower water-proof layer is arranged on the prefabricated relief plate, the vertical drainage pipe is arranged at the upper part of the gravel sand bag, the gravel sand bag is arranged at the junction of the cast-in-place side plate and the lower water-proof layer, a drainage hole is arranged on the contact surface of the cast-in-place side plate and the gravel sand bag, and the upper foam concrete layer is arranged above the lower water-proof layer.

Preferably, the method comprises the following steps: cast-in-place curb plate and pour through cast-in-place curb plate hoop post drawknot formwork system and form, cast-in-place curb plate top is equipped with the pedestal connection muscle, and cast-in-place curb plate top sets up crash barrier through the pedestal connection muscle.

Preferably, the method comprises the following steps: the cast-in-place side plate hoop column tie formwork system comprises split bolts, hoop columns, a formwork, hoops, connecting bolts, fixing bolts, a chassis and anchor bolts, wherein the split bolts are arranged at the tops of the hoop columns on two sides, the chassis is arranged at the bottoms of the hoop columns and arranged on a crown beam through the anchor bolts, the hoops are arranged on the hoop columns through the fixing bolts, and the formwork is fixed on the inner sides of the hoops through the connecting bolts; the inner side of the template is provided with a side plate reinforcement.

Preferably, the method comprises the following steps: the staple bolt mainly comprise fixed hoop, otic placode and connection hoop, connect through the fixing bolt between the fixed hoop, the fixed hoop inboard is equipped with the connection hoop, is equipped with the connecting bolt hole on the connection hoop, the connection hoop passes through the connecting bolt with the template and is connected.

Preferably, the method comprises the following steps: the top surface of the upper foamed concrete layer is provided with a certain gradient, and a water-permeable pavement layer is arranged above the upper water-resisting layer.

Preferably, the method comprises the following steps: the composite layer is formed by bonding a reinforced net and a reverse filter geotextile, and is fixed on the periphery of the drain pipe and the surface of the inner side of the crown beam through rivets.

Preferably, the method comprises the following steps: and a mortar filling layer is arranged between the inner lateral steel beam and the steep mountain.

Preferably, the method comprises the following steps: and a non-woven geotextile is arranged between the lower foam concrete layer and the pebble layer.

Preferably, the method comprises the following steps: the upper water-resisting layer is arranged on the upper foam concrete layer, and the side water-resisting layer is arranged between the steep mountain land and the upper foam concrete layer.

The construction method of the light embankment structure on the steep mountain land comprises the following steps:

1) according to measurement and setting-out, determining the positions of an anti-slide pile and a foundation pile in a construction area of a steep mountain, drilling a hole to construct the foundation pile, overlapping and binding a crown beam steel bar on the top of the foundation pile, pre-burying a drain pipe and a foundation bolt at the corresponding position, pouring concrete to form a crown beam, simultaneously performing integrated pouring construction of the anti-slide pile and a support column, and pre-burying and installing a steel beam fixing rib on the top of the support column;

2) side plate reinforcing bars are lapped and bound at the top of the crown beam, and then cast-in-place side plate hoop column tie formwork system construction is carried out: manufacturing hoop columns in advance, welding a chassis with bolt holes at the bottoms of the hoop columns, fixing the chassis on the two sides of a side plate reinforcement bar through foundation bolts, selecting a combined steel template, gradually installing the template, simultaneously gradually installing the hoops on the hoop columns through fixing bolts, attaching the template and connecting hoops on the hoops, fixedly bolting through the connecting bolts, gradually installing the template at a designed height, finally installing split bolts at the tops of the hoop columns on the two sides, and adjusting the space between the templates on the two sides to the designed width of a cast-in-place side plate;

3) pouring cast-in-place side plate concrete in a layered mode, reserving drain holes at corresponding positions, reserving bracket connecting ribs at positions corresponding to support columns, embedding and installing base connecting ribs of anti-collision guardrails at the tops of the cast-in-place side plates, dismantling the templates after maintenance is completed, binding bracket reinforcing steel bars in an overlapping mode, embedding and installing steel beam fixing ribs at the tops of the brackets, and then pouring concrete to form brackets with the same height as the support columns;

4) carrying out horizontal hole opening construction at the high positions of the steep mountain land, the support column and the like, then hoisting an inner lateral steel beam, inserting one end of the inner lateral steel beam into the hole body, installing the other end of the inner lateral steel beam at the top of the support column by using a steel beam fixing rib, hoisting an outer lateral steel beam simultaneously, installing the outer lateral steel beam and the top of the support column by using a steel beam fixing rib respectively, carrying out transverse welding between the outer lateral steel beam and the inner lateral steel beam firmly, finally pouring mortar into the horizontal hole opening, and forming a mortar filling layer between the inner lateral steel beam and the mountain body;

5) firstly, paving a reinforced net on the inner side surface of a crown beam, fixing the reinforced net by using an anchor nail, then pasting reverse filter geotextile on the reinforced net to form a composite layer, then backfilling a pebble layer, then paving non-woven geotextile on the pebble layer, additionally, installing inserted bars at equal intervals on cast-in-place side plates and steep mountain sections below an outer lateral steel beam and an inner lateral steel beam, meanwhile, welding inserted bars at the bottoms of the outer lateral steel beam and the inner lateral steel beam, then installing a fixed hanging net on the inserted bars, and finally pouring a lower foam concrete layer above the non-woven geotextile to a position equal to the height of the steel beams;

6) hoisting prefabricated load reduction plates manufactured in advance in blocks and installing the prefabricated load reduction plates on a steel beam, making mortar joint pointing between every two prefabricated load reduction plates, paving and constructing a lower water-resisting layer above the prefabricated load reduction plates, paving and constructing a side water-resisting layer on the surface of a steep mountain land, then placing a through long gravel sand bag at the junction of the lower water-resisting layer and a cast-in-place side plate, communicating a drain hole, and installing a vertical drain pipe above the gravel sand bag;

7) and (2) pouring an upper foam concrete layer above the lower waterproof layer to a designed height, enabling the surface of the upper foam concrete layer to have a certain outward inclination, paving the upper waterproof layer on the surface of the upper foam concrete layer, constructing a permeable pavement layer above the upper waterproof layer, installing and binding anti-collision guardrail steel bars on the top of the cast-in-place side plate through base connecting bars, and pouring concrete to form an anti-collision guardrail so as to complete construction of the light embankment structure in the steep mountainous region.

The invention has the beneficial effects that:

1. according to the invention, the prefabricated load reduction plate is arranged on the transverse steel beam to carry out layered load reduction backfilling on the foam concrete backfilling area, so that the backfilling quality is ensured, the load reduction plate is prefabricated in advance, the hoisting is convenient, the construction speed is greatly improved, and the technical benefit advantage is obvious.

2. In the invention, the pile foundation and the anti-slide pile are arranged in the mountain body, so that the bearing capacity of the roadbed is enhanced, in addition, the inserted bars and the hanging nets are arranged in the lower foam concrete backfilling area, and then the light foam concrete is backfilled, so that the integrity is good, the rigidity is high, and the disasters of landslide, collapse and the like caused by high filling and deep digging of the roadbed can be avoided.

3. Compared with the prior art, the cast-in-place side plate hoop column tie formwork system has the advantages that the formwork supporting structure is reasonable and stable, the assembly and disassembly are convenient, the flexible adjustment is convenient, the construction efficiency can be greatly improved, and the construction period is shortened.

Drawings

FIG. 1 is a schematic illustration of a light embankment structure on steep hilly terrain;

fig. 2 is a schematic layout of foundation piles and slide resistant piles;

FIG. 3 is a schematic view of a cast-in-place side panel hoop column tie formwork system;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a schematic structural view of the hoop;

FIG. 6 is a schematic view of a cast-in-place side panel;

FIG. 7 is a view of the installation arrangement of transverse steel beams;

FIG. 8 is a schematic view of the construction of the lower foam concrete layer;

fig. 9 is a schematic layout of the prefabricated load-reducing plate and the drainage and water-stop system.

Description of reference numerals: 1-anti-collision guardrail; 2-base connecting rib; 3-vertical drain pipe; 4-gravel sand bag; 5-a drain hole; 6-outer lateral steel beam; 7-steel beam fixing ribs; 8-bracket; 9-inserting ribs; 10-hanging net; 11-cast-in-place side panels; 12-a crown beam; 13-the drain pipe; 14-permeable pavement layer; 15-upper water barrier; 16-steep hilly area; 17-side water barrier; 18-upper foam concrete layer; 19-lower water barrier; 20-prefabricating a relief plate; 21-inboard transverse steel beam; 22-mortar filling layer; 23-lower foam concrete layer; 24-support column; 25-slide-resistant pile; 26-non-woven geotextile; 27-pebble bed; 28-foundation pile; 29-split bolt; 30-ear plate; 31-a hoop column; 32-template; 33-anchor ear; 34-side plate reinforcement; 35-connecting bolt; 36-fixed bolt; 37-the chassis; 38-anchor bolts; 39-fixed hoop; 40-connecting bolt hole; 41-connecting hoop; 42-composite layer.

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 light embankment structure for the steep mountain land comprises base connecting ribs 2, vertical drain pipes 3, gravel sand bags 4, drain holes 5, outer lateral steel beams 6, steel beam fixing ribs 7, brackets 8, dowel bars 9, a hanging net 10, cast-in-place side plates 11, crown beams 12, drain pipes 13, an upper water-resisting layer 14, a lateral water-resisting layer 17, an upper foam concrete layer 18, a lower water-resisting layer 19, a prefabricated load-reducing plate 20, inner lateral steel beams 21, a mortar filling layer 22, a lower foam concrete layer 23, support columns 24, anti-slide piles 25, pebble layers 27, foundation piles 28 and composite layers 42, wherein the anti-slide piles 25 and the foundation piles 28 are arranged in the steep mountain land 16, the crown beams 12 are arranged above the foundation piles 28, the cast-in-place side plates 11 are arranged above the crown beams 12, the base connecting ribs 2 are arranged at the tops of the cast-in-place side plates 11, the support columns 24 are arranged above the anti-slide piles 25, the bracket 8 is arranged at equal heights of the cast-in-place side plates 11 and the support columns 24, the top parts of the bracket 8 and the support column 24 are provided with steel beam fixing ribs 7, one end of the outer transverse steel beam 6 is arranged on the bracket 8, the other end is arranged on the top part of the support column 24, one end of the inner transverse steel beam 21 is arranged on the top part of the support column 24, the other end is arranged in the mountain 16 of the steep mountain, the mortar filling layer 22 is arranged between the inner transverse steel beam 21 and the mountain 16 of the steep mountain, the inner side of the crown beam 12 is provided with a pebble layer 27, the contact surface between the pebble layer 27 and the inner side of the crown beam 12 is provided with a composite layer 42, the drain pipe 13 is arranged in the crown beam 12 and is communicated with the pebble layer 27, the inserted bars 9 are respectively arranged on the inner side of the cast-in-place side plate 11, the bottom part of the steel beam and the steep mountain 16, the inserted bars 9 are provided with the suspension nets 10, the prefabricated load reducing plate 20 is respectively arranged on the top parts of the outer transverse steel beam 6 and the inner transverse steel beam 21, the lower foamed concrete layer 23 is arranged between the prefabricated load reducing plate 20 and the pebble layer 27, and a non-woven geotextile 26 is arranged between a lower foam concrete layer 23 and a pebble layer 27, the lower water-resisting layer 19 is arranged on the prefabricated load-reducing plate 20, the upper part of the gravel sand bag 4 is provided with a vertical drain pipe 3, the gravel sand bag 4 is arranged at the junction of the cast-in-place side plate 11 and the lower water-resisting layer 19, the contact surface of the cast-in-place side plate 11 and the gravel sand bag 4 is provided with a drain hole 5, the upper foam concrete layer 18 is arranged above the lower water-resisting layer 19, the upper water-resisting layer 15 is arranged on the upper foam concrete layer 18, and the side water-resisting layer 17 is arranged between the steep mountain land 16 and the upper foam concrete layer 18.

Cast-in-place curb plate 11 pour through cast-in-place curb plate hoop post drawknot formwork system and form, and cast-in-place curb plate 11 top can set up anticollision barrier 1 through pedestal connection muscle 2.

The cast-in-situ side plate hoop column tie formwork system comprises a split bolt 29, hoop columns 31, a formwork 32, hoops 33, a connecting bolt 35, a fixing bolt 36, a chassis 37 and anchor bolts 38, wherein the split bolt 29 is arranged at the tops of the hoop columns 31 on two sides, the chassis 37 is arranged at the bottom of the hoop columns 31 and is arranged on the crown beam 12 through the anchor bolts 38, the hoops 33 are arranged on the hoop columns 31 through the fixing bolts 36, and the formwork 32 is arranged and fixed on the inner sides of the hoops 33 through the connecting bolt 35; side panel reinforcements 34 are provided on the inside of the form 32.

The hoop 33 mainly comprises a fixed hoop 39, an ear plate 30 and a connecting hoop 41, the fixed hoops 39 are connected through a fixed bolt 36, the connecting hoop 41 is arranged on the inner side of the fixed hoop 39, a connecting bolt hole 40 is formed in the connecting hoop 41, and the connecting hoop 41 is connected with the template 32 through a connecting bolt 35.

The top surface of the upper foamed concrete layer 18 is provided with a certain gradient, and a permeable pavement layer 14 can be arranged above the upper waterproof layer 15, so that water drainage is facilitated.

The composite layer 42 is composed of a reinforced net and a reverse filter geotextile.

Example two

The construction method of the light embankment structure on the steep mountain land comprises the following steps:

1) as shown in fig. 2, according to the measurement and setting-out, the positions of the anti-slide pile 25 and the foundation pile 28 are determined in the construction area of the steep mountain 16, the foundation pile 28 is drilled, the top of the foundation pile 28 is lapped and bound with the steel bar of the top beam 12, the drain pipe 13 and the foundation bolt 38 are embedded at the corresponding positions, the concrete is poured to form the top beam 12, the integrated pouring construction of the anti-slide pile 25 and the support column 24 is simultaneously carried out, and the steel beam fixing bar 7 is embedded and installed at the top of the support column 24;

2) as shown in fig. 3, 4 and 5, the top of the crown beam 12 is lapped and bound with the side plate reinforcing bars 34, and then the cast-in-situ side plate hoop column tie formwork system construction is carried out: manufacturing a steel pipe hoop column in advance, welding a chassis 37 with bolt holes at the bottom of the hoop column 31, fixing the anchor bolt 38 at two sides of a side plate reinforcement 34, selecting a combined steel template, gradually installing the template 32, simultaneously gradually installing the hoop 33 on the hoop column 31 by using a fixing bolt 36, attaching the template 32 to a connecting hoop 41 on the hoop 33, fixedly bolting by using a connecting bolt 35, gradually installing the template 32 at a designed height, finally installing a split bolt at the top of the hoop columns 31 at two sides, and adjusting the distance between the templates 32 at two sides to the designed width of a cast-in-place side plate 11;

3) as shown in fig. 6, concrete of a cast-in-place side plate 11 is poured in layers, a drain hole 5 is reserved at a corresponding position, a bracket 8 connecting bar is reserved at a position corresponding to a support column 24, a base connecting bar 2 of an anti-collision guardrail 1 is installed on the top of the cast-in-place side plate 11 in an embedded mode, after maintenance is completed, a template is dismantled, lap joints of the bracket 8 steel bars are bound, steel beam fixing bars 7 are installed in the embedded mode, and then concrete is poured to form a bracket 8 with the same height as the support column 24;

4) as shown in fig. 7, horizontal hole-opening construction is performed at the height of the steep mountain 16, the support column 24 and the like, then the inner lateral steel beam 21 is hoisted, one end of the inner lateral steel beam 21 is inserted into the hole body, the other end of the inner lateral steel beam is installed at the top of the support column 24 by using the steel beam fixing rib 7, meanwhile, the outer lateral steel beam 6 is hoisted and installed at the tops of the bracket 8 and the support column 24 respectively by using the steel beam fixing rib 7, transverse welding is performed between the outer lateral steel beam 6 and the inner lateral steel beam 21 to be firm, finally mortar is poured into the horizontal hole-opening, and a mortar filling layer 22 is formed between the steel beam and the mountain body;

5) as shown in fig. 8, a reinforced net is firstly laid on the inner side surface of the crown beam 12, the reinforced net is fixed by an anchor, then a reverse filter geotextile is pasted on the reinforced net to form a composite layer 42, a pebble layer 27 with a certain thickness is backfilled, then a non-woven geotextile 26 is laid, additionally, dowel bars 9 are arranged on a cast-in-place side plate 11 below the steel beam and 16 sections of a steep mountain land at equal intervals, meanwhile, the dowel bars 9 are welded at the bottom of the steel beam, then a steel wire hanging net is arranged and fixed on the dowel bars 9, and finally a lower foam concrete layer 23 is poured to be at the same height with the steel beam;

6) as shown in fig. 9, prefabricated load-reducing plates 20 manufactured in advance are lifted up in blocks and installed on adjacent steel beams, mortar pointing is made between every two prefabricated load-reducing plates 20, a lower water-resisting layer 19 is paved and constructed above the load-reducing plates, a side water-resisting layer 17 is paved and constructed on the surface of a steep mountain 16, then a full-length gravel sand bag 4 is placed at the junction of the lower water-resisting layer 19 and a cast-in-place side plate 11 and communicated with a drain hole 5, and a vertical drain pipe 3 is installed above the gravel sand bag 4;

7) as shown in fig. 1, an upper foamed concrete layer 18 is poured to a designed height, the surface of the upper foamed concrete layer 18 has a certain outward inclination, then an upper water-resisting layer 15 is paved on the surface of the upper foamed concrete layer 18, a water-permeable pavement layer 14 is constructed above the upper water-resisting layer 15, finally reinforcing steel bars for binding the crash barrier 1 are installed on the top of the cast-in-place side plate 11 through base connecting bars 2, concrete is poured to form the crash barrier 1, and the construction of the light embankment structure in the steep mountainous region is completed.