阅读说明：本技术 泡沫混凝土避险车道的施工方法 (Construction method of foam concrete danger-avoiding lane ) 是由 王新泉 刁红国 崔允亮 魏纲 于威 齐昌广 于 2021-07-02 设计创作，主要内容包括：本发明涉及泡沫混凝土避险车道的施工方法,包括步骤：1)在避险车道施工区平整场地；2)端桩、端立柱和钢筋混凝土防撞墙一体化施工；3)将预制H型桩柱进行吊装和打设施工；4)将预制钢混面板进行吊装施工；5)在两侧的条形基础之间进行内部的夯实素土层施工；6)泡沫混凝土浇筑；7)进行引路段、前部缓冲减速段以及顶部防撞段的面层浇筑施工；8)在预制H型桩柱顶部栓接护栏基座；9)服务车道施工；10)中部砂层减速段施工；11)强力反弹橡胶网减速系统施工。本发明的有益效果是：本发明中设置前部缓冲减速段、中部砂层减速段和强力反弹橡胶网,起到多重减速制动效果,实现失控车辆的缓冲减速制动,有利于减轻避险后车辆的受损程度。(The invention relates to a construction method of a foam concrete danger avoiding lane, which comprises the following steps: 1) leveling the field in a construction area of the hedge lane; 2) end piles, end upright columns and reinforced concrete anti-collision walls are integrally constructed; 3) hoisting and driving the prefabricated H-shaped pile; 4) hoisting the prefabricated reinforced concrete panel; 5) carrying out internal ramming plain soil layer construction between the strip foundations at two sides; 6) pouring foam concrete; 7) carrying out surface layer pouring construction on the guide road section, the front buffering deceleration section and the top anti-collision section; 8) bolting a guardrail base at the top of the prefabricated H-shaped pile; 9) constructing a service lane; 10) constructing a middle sand layer deceleration section; 11) and constructing a strong rebounding rubber net speed reduction system. The invention has the beneficial effects that: the front buffering deceleration section, the middle sand layer deceleration section and the strong rebounding rubber net are arranged in the invention, so that multiple deceleration braking effects are achieved, the buffering deceleration braking of an out-of-control vehicle is realized, and the damage degree of the vehicle after danger avoidance is favorably reduced.)

1. A construction method of a foam concrete danger avoiding lane is characterized by comprising the following steps:

1) the method comprises the following steps of (1) leveling a field in a construction area of an emergency lane, determining a specific construction position according to measurement and setting-out, and firstly constructing a tamping plain soil layer (15) at the bottom, wherein the area is positioned at the lower part of a strip foundation (14), and the tamping area exceeds the strip foundations (14) at two sides to a certain extent;

2) End stake (16), end stand (11) and reinforced concrete anticollision wall (17) integration construction: drilling holes on two sides of the end part of the danger avoiding lane, lowering a reinforcement cage to pour to form an end pile (16), overlapping and binding reinforcement on the upper part of the end pile (16) to pour to form an end upright post (11), reserving a groove on the inner side edge of the end upright post (11) for inserting a prefabricated reinforced concrete panel (30) in the later period, overlapping and binding reinforcement between the end upright posts (11) on two sides to pour to form an anti-collision wall (17), and reserving an expansion head embedded rod (20) of an anti-collision frame (8) during construction;

3) carrying out on-site hoisting and driving construction on the manufactured prefabricated H-shaped piles (13), then casting a strip foundation (14) on a rammed plain soil layer (15) between the prefabricated H-shaped piles (13), and reserving a groove matched with the prefabricated steel-concrete panel (30) at the top of the strip foundation (14);

4) carrying out on-site hoisting construction on the manufactured prefabricated steel-concrete panel (30), reserving counter-pulling holes (10) on the prefabricated steel-concrete panel (30), and reserving the counter-pulling holes (10) in a foam concrete pouring area;

5) carrying out internal rammed plain soil layer (15) construction between strip foundations (14) on two sides, then arranging a water-resisting layer (27) on the internal rammed plain soil layer (15), paving graded broken stones to form a gravel layer (12), embedding a drainage system (18) during construction, arranging the drainage system (18) and counter-pulling holes (10) in a spaced manner, and finally carrying out counter-pulling construction through the counter-pulling holes (10) on two sides by utilizing counter-pulling rods (29) and bolts (28);

6) Pouring the foam concrete (6): when the steel templates are transversely erected, the templates are fixed on prefabricated H-shaped piles (13) and prefabricated steel-concrete panels (30) on two sides, the positions of the templates are reasonably arranged to form a step shape, a sand layer reduction pit is reserved, a construction joint is arranged in the longitudinal direction of 5-10m of the foam concrete (6) filling, the pouring is controlled according to the thickness of a layer of 0.3-0.8m, and the step shape is formed by pouring on the top layer;

7) after the foam concrete (6) is cured, performing surface layer pouring construction of a leading road section (1), a front buffering deceleration section (4) and a top anti-collision section (9), wherein the leading road section (1) is connected with a traffic main line and the front buffering deceleration section (4), the top anti-collision section (9) is positioned below an expansion head embedded rod (20) of an anti-collision wall (17), a deceleration strip (33) is arranged during the surface layer pouring construction of the front buffering deceleration section (4), then, the reserved expansion head embedded rod (20) is utilized, an oblique cross rod (19) is welded at the end part of the expansion head embedded rod (20), a cross support (21) is welded between the expansion head embedded rods (20) to form an anti-collision frame (8), and an old tire is bound on the oblique cross rod (19) at the end part of the anti-collision frame (8) by a steel wire to form a tire wall (7);

8) the top of the prefabricated H-shaped pile (13) is bolted with guardrail bases (2), and then anti-collision guardrails (3) are arranged between the guardrail bases (2);

9) Construction of a service lane (31): a certain width is separated on one side of the sand layer speed reduction pit by using a template, and then a concrete pavement is poured on the top of the separated step-shaped foam concrete to form a service lane (31) which is parallel to the section of the middle sand loosening speed reduction section (5);

10) selecting dry loose sand, filling the loose sand into the sand layer speed reduction pit to a required thickness according to the designed longitudinal slope direction to form a middle sand layer speed reduction section (5), wherein the middle sand layer speed reduction section (5) is positioned between the front buffering speed reduction section (4) and the top anti-collision section (9);

11) construction of a strong rebound rubber net speed reduction system: the anchor nails are arranged on the prefabricated H-shaped piles (13) on the two sides, the strong rebound rubber net (32) is bound on the anchor nails, one or more than one times of the strong rebound rubber net (32) are arranged on the middle sand layer deceleration section (5) to form strong tensile resistance, and therefore the construction operation of the foam concrete danger avoiding lane is completed.

Technical Field

The invention relates to the technical field of road traffic safety, in particular to a construction method of a foam concrete danger avoiding lane.

Background

The danger avoiding lane is a special lane which is additionally arranged on the outer side of a lane on a long and steep downhill road section and is used for driving a vehicle out of control in speed (brake failure) away from a main line for safe deceleration. For drivers on a highway, the danger avoiding lane is a 'lifesaving lane'. When a vehicle, particularly a large vehicle, drives into a downhill section and then is continuously braked, a brake hub is easily overheated, so that the braking performance of the vehicle is reduced or the braking fails, and severe traffic accidents such as rear-end collision, head-on collision and people death due to crash of the vehicle on the cliff occur.

The danger avoiding lane mainly comprises an ascending lane type, a horizontal lane type, a descending lane type and a sand pile type. At present, the most domestic application is the uphill danger avoiding lane, but the danger avoiding lanes of the type all need enough buffering length and occupy more area. In many mountainous and hilly areas in China, many expressways cross mountains and mountains, danger avoiding lanes are limited by terrain and are not easy to set, or some danger avoiding lanes on road sections have insufficient space and insufficient length. In addition, although the braking effect is enhanced by some danger avoiding lanes, accidents such as vehicle rollover and the like occur due to over-emergency braking.

Therefore, the construction method of the foam concrete danger-avoiding lane which is high in construction speed, capable of effectively buffering, decelerating and braking and small in occupied area 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 foam concrete danger avoiding lane.

The foam concrete danger-avoiding lane comprises a guide road section, a front buffering deceleration section, a middle sand layer deceleration section, a top anti-collision section, a service lane and a strong rebound rubber net; the guiding section is connected with a traffic main line and a front buffering deceleration section, the front buffering deceleration section is connected with a middle sand layer deceleration section, the middle sand layer deceleration section is connected with a top anti-collision section, the service lane and the middle sand layer deceleration section are parallel to each other in section, a tamping plain soil layer, a gravel layer and foam concrete are sequentially arranged at the bottom of the danger avoiding lane from bottom to top, prefabricated H-shaped piles are arranged at two sides of the tamping plain soil layer, end piles, end columns and anti-collision walls are arranged at the end parts of the foam concrete, a strip foundation is arranged between the prefabricated H-shaped piles, prefabricated steel-concrete panels are arranged on the strip foundation, the prefabricated steel-concrete panels are provided with opposite-pulling holes, the prefabricated steel-concrete panels at two sides of the gravel layer are oppositely pulled and reinforced through opposite-pulling rods and bolts, an anti-collision frame is arranged on the anti-collision wall above the top anti-collision section, a tire wall is arranged at the end part of the anti-collision frame, and a drainage system is arranged in the foam concrete, the prefabricated H-shaped pile top is equipped with the guardrail base, be equipped with anticollision barrier between the guardrail base, powerful bounce-back rubber net sets up between the prefabricated H-shaped pile of middle part sand bed deceleration section both sides.

Preferably, the method comprises the following steps: the anti-collision frame comprises oblique cross rods, expansion head embedded rods and cross supports, the expansion head embedded rods are pre-buried in the anti-collision wall, the cross supports are arranged between the upper expansion head embedded rods and the lower expansion head embedded rods, and the oblique cross rods are arranged at the end parts of the expansion head embedded rods.

Preferably, the method comprises the following steps: the drainage system comprises a connecting rib, an annular wing plate, a drain hole, a drain pipe, geotextile and a water-resisting layer, wherein the water-resisting layer is arranged between the gravel layer and the tamped plain soil layer, the geotextile is arranged between the foam concrete and the gravel layer, the pipe body of the drain pipe is provided with the drain hole and wraps the geotextile, the upper part of the drain pipe is arranged in the foam concrete, the bottom of the drain pipe is provided with the annular wing plate, the annular wing plate is provided with the connecting rib, and the bottom of the drain pipe is arranged in the gravel layer.

Preferably, the method comprises the following steps: the bar foundation first half be reinforced concrete structure, the latter half is plain concrete structure, and the bar foundation top be equipped with prefabricated reinforced concrete panel assorted recess.

Preferably, the method comprises the following steps: end upright columns are arranged at the upper parts of the end piles, and anti-collision walls are arranged between the end upright columns on the two sides of the end part of the foam concrete; the end upright post inner side edge is provided with a groove matched with the prefabricated reinforced concrete panel.

Preferably, the method comprises the following steps: the surface of the foam concrete is step-shaped.

Preferably, the method comprises the following steps: the tire wall is perpendicular to the middle sand layer deceleration section.

Preferably, the method comprises the following steps: and the front buffering deceleration section is provided with a deceleration strip.

The construction method of the foam concrete danger avoiding lane comprises the following steps:

1) leveling a field in a construction area of an escape lane, determining a specific construction position according to measurement and setting-out, and firstly constructing a tamping plain soil layer at the bottom, wherein the area is positioned at the lower part of a strip foundation and exceeds the strip foundations at two sides by a certain range;

2) end stake, end stand and reinforced concrete anticollision wall integration construction: drilling holes on two sides of the end part of the danger avoiding lane, lowering a reinforcement cage to pour to form an end pile, overlapping and binding reinforcement bars on the upper part of the end pile to pour to form an end upright, reserving a groove on the inner side edge of the end upright for inserting a prefabricated reinforced concrete panel in the later period, overlapping and binding reinforcement bars between the end uprights on two sides to pour to form an anti-collision wall, and reserving an expanded head embedding rod of an anti-collision frame during construction;

3) carrying out on-site hoisting and driving construction on the manufactured prefabricated H-shaped piles, then casting a strip foundation on a rammed plain soil layer between the prefabricated H-shaped piles in situ, and reserving a groove matched with the prefabricated steel-concrete panel at the top of the strip foundation;

4) Carrying out on-site hoisting construction on the manufactured prefabricated steel-concrete panel, reserving counter-pulling holes on the prefabricated steel-concrete panel, and enabling the reserved positions of the counter-pulling holes to be in a foam concrete pouring area;

5) carrying out internal rammed plain soil layer construction between the strip foundations on the two sides, then arranging a water-resisting layer on the internal rammed plain soil layer, paving graded broken stones to form a crushed stone layer, embedding a drainage system during construction, arranging the drainage system and the counter-pull holes in a spaced manner, and finally carrying out counter-pull construction through the counter-pull holes on the two sides by utilizing counter-pull rods and bolts;

6) pouring foam concrete: when the steel templates are transversely erected, the templates are fixed on prefabricated H-shaped piles and prefabricated steel-concrete panels on two sides, the positions of the templates are reasonably arranged to form a step shape, a sand layer speed reduction pit is reserved, a construction joint is arranged in the longitudinal direction of 5-10m of foam concrete filling, pouring is controlled according to the thickness of a layer of 0.3-0.8 m, and the top layer is poured to form the step shape;

7) after foam concrete curing is completed, surface layer pouring construction of a leading road section, a front buffering deceleration section and a top anti-collision section is carried out, the leading road section is connected with a traffic main line and the front buffering deceleration section, the top anti-collision section is positioned below an expansion head embedded rod of an anti-collision wall, a deceleration strip is arranged during surface layer pouring construction of the front buffering deceleration section, then the reserved expansion head embedded rod is utilized, oblique cross rods are welded at the end parts of the expansion head embedded rods, cross supports are welded among the expansion head embedded rods to form an anti-collision frame, and old tires are bound by steel wires on the oblique cross rods at the end parts of the anti-collision frame to form a tire wall;

8) Bolting guardrail bases at the tops of the prefabricated H-shaped piles, and then installing anti-collision guardrails between the guardrail bases;

9) construction of a service lane: separating a certain width on one side of the sand layer speed reduction pit by using a template, and then pouring a concrete pavement on the top of the separated step-shaped foam concrete to form a service lane with middle sand loosening speed reduction sections parallel to the same section;

10) selecting dry and loose sandy soil, filling the loose sandy soil into the sand layer decelerating pit to a required thickness according to a designed longitudinal slope, and forming a middle sand layer decelerating section which is positioned between the front buffering decelerating section and the top anti-collision section;

11) construction of a strong rebound rubber net speed reduction system: and (3) installing anchoring nails on the prefabricated H-shaped piles at two sides, binding the strong rebound rubber net on the anchoring nails, and arranging one or more strong rebound rubber nets at the middle sand layer deceleration section to form strong tensile resistance, thereby completing the construction operation of the foam concrete danger avoiding lane.

The invention has the beneficial effects that:

1. the front buffering deceleration section, the middle sand layer deceleration section and the strong rebounding rubber net are arranged in the invention, so that multiple deceleration braking effects are achieved, the buffering deceleration braking of an out-of-control vehicle is realized, the damage degree of the vehicle after danger avoidance is favorably reduced, and the technical benefit advantage is obvious.

2. According to the invention, by arranging the multiple deceleration braking sections and the top anti-collision section, the braking distance is effectively shortened, the terrain limitation is overcome, an out-of-control vehicle is prevented from rushing out of the danger avoiding lane, the construction length of the danger avoiding lane is reduced, the construction cost is greatly reduced, and the land is saved.

3. The prefabricated H-shaped pile and the prefabricated reinforced concrete panel are adopted to realize rapid installation of the panel, the structure is stable, and the transverse constraint force between the prefabricated reinforced concrete panels is enhanced by arranging the counter-pulling screw rods.

4. Compared with the prior art, the invention adopts foam concrete filling, and the filler is conveyed to a destination by a piping pump without mechanical rolling and vibrating, thereby having simple and convenient operation and fast construction progress.

5. The drainage system provided by the invention has a reasonable structure, effectively drains accumulated water in the refuge lane, and simultaneously ensures the drying and loosening performance of sandy soil in the deceleration section of the middle sand layer.

Drawings

FIG. 1 is a schematic elevation view of a foam concrete highlighter lane;

FIG. 2 is a top view of the installation of the prefabricated H-shaped piles and prefabricated steel-concrete panels;

FIG. 3 is an installation cross-section of a strip foundation and a prefabricated steel-concrete panel;

FIG. 4 is a schematic view of the installation of a split screw;

FIG. 5 is a cross-sectional view of a drainage system arrangement;

FIG. 6 is a cross-sectional view of a foam concrete placement;

FIG. 7 is a schematic view of a keep away lane pavement layer;

FIG. 8 is a schematic view of a collision avoidance system;

FIG. 9 is a schematic cross-sectional view of an end of an escape lane;

FIG. 10 is a schematic plan view of an escape lane;

FIG. 11 is a schematic illustration of the filling of the deceleration section of the middle sand layer.

Description of reference numerals: 1-leading section; 2-guardrail base; 3-anti-collision guardrail; 4-front buffer deceleration section; 5-middle sand deceleration section; 6-foam concrete; 7-tire wall; 8-anti-collision frame; 9-top bump segment; 10-opposite pulling hole; 11-end post; 12-a crushed stone layer; 13-prefabricating an H-shaped pile; 14-bar foundation; tamping a plain soil layer; 16-end pile; 17-crashproof wall; 18-drainage system; 19-diagonal cross bars; 20-enlarged head insert rod; 21-cross bracing; 22-connecting ribs; 23-annular wing plate; 24-drain holes; 25-drain pipe; 26-geotextile; 27-water barrier; 28-bolt; 29-opposite pull rod; 30-prefabricating a steel-concrete panel; 31-service lane; 32-strong rebound rubber net; 33-speed bump.

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 foam concrete danger avoiding lane comprises a guide road section 1, a front buffering deceleration section 4, a middle sand layer deceleration section 5, a top collision avoidance section 9, a service lane 31 and a strong rebound rubber net 32; the guide road section 1 is connected with a traffic main line and a front buffering deceleration section 4, the front buffering deceleration section 4 is connected with a middle sand layer deceleration section 5, the middle sand layer deceleration section 5 is connected with a top anti-collision section 9, the service lane 31 and the middle sand layer deceleration section 5 are parallel to each other in the same section, a tamping element soil layer 15, a gravel layer 12 and foam concrete 6 are arranged at the bottom of the danger avoiding lane, prefabricated H-shaped piles 13 are arranged at two sides of the danger avoiding lane, end piles 16, end piles 11 and anti-collision walls 17 are arranged at the end parts of the danger avoiding lane, a strip foundation 14 is arranged between the prefabricated H-shaped piles 13, a prefabricated steel-concrete panel 30 is arranged on the strip foundation 14, the prefabricated steel-concrete panel 30 is provided with a counter-pull hole 10, the prefabricated steel-concrete panels 30 at two sides of the danger avoiding lane are counter-pulled and reinforced through a counter-pull rod 29 and a bolt 28, the anti-collision wall 17 above the top anti-collision section 9 is provided with an anti-collision frame 8, the end part of the anti-collision frame 8 is provided with a tire wall 7, a drainage system 18 is arranged inside the foam concrete 6, guardrail bases 2 are arranged at the tops of the prefabricated H-shaped piles 13, anti-collision guardrails 3 are arranged between the guardrail bases 2, and strong rebounding rubber nets 32 are arranged between the prefabricated H-shaped piles on two sides of the middle sand layer speed reduction section.

The anti-collision frame 8 comprises an oblique cross rod 19, an expansion head embedded rod 20 and cross supports 21, wherein the expansion head embedded rod 20 is pre-embedded in the anti-collision wall 17, the cross supports 21 are arranged between the upper and lower expansion head embedded rods 20, and the oblique cross rod 19 is arranged at the end part of the expansion head embedded rod 20.

The drainage system 18 comprises a connecting rib 22, an annular wing plate 23, a drainage hole 24, a drainage pipe 25, geotextile 26 and a water-resisting layer 27, wherein the water-resisting layer 27 is arranged between the gravel layer 12 and the rammed plain soil layer 15, the geotextile 26 is arranged between the foam concrete 6 and the gravel layer 12, the drainage pipe 25 is provided with the drainage hole 24 and wraps the geotextile 26, the upper part of the drainage pipe 25 is arranged in the foam concrete 6, the annular wing plate 23 is arranged at the bottom of the drainage pipe 25, the connecting rib 22 is arranged on the annular wing plate 23, and the bottom of the drainage pipe 25 is arranged in the gravel layer 12.

The upper half part of the strip foundation 14 is of a reinforced concrete structure, the lower half part of the strip foundation is of a plain concrete structure, and a groove matched with the prefabricated reinforced concrete panel 30 is formed in the top of the strip foundation 14.

The upper part of the end pile 16 is provided with an end upright post 11, and an anti-collision wall 17 is arranged between the end upright posts 11 at the two sides of the end part of the foam concrete 6; the inner side edge of the end upright post 11 is provided with a groove matched with the prefabricated steel-concrete panel 30.

The surface of the foam concrete 6 is step-shaped.

The tire wall 7 is vertical to the middle sand layer deceleration section 5.

The front buffering deceleration section 4 is provided with a deceleration strip 33.

Example two

The construction method of the foam concrete danger avoiding lane comprises the following steps:

1) the method comprises the following steps of (1) leveling a field in a construction area of an emergency lane, determining a specific construction position according to measurement and setting-out, and firstly constructing a tamping plain soil layer 15 at the bottom, wherein the area is positioned at the lower part of a strip foundation 14 and exceeds the strip foundations 14 at two sides by a certain range;

2) end pile 16, end upright post 11 and reinforced concrete anticollision wall 17 integration construction: drilling holes on two sides of the end part of the danger avoiding lane, lowering a reinforcement cage to pour to form an end pile 16, overlapping and binding reinforcement on the upper part of the end pile 16 to pour to form an end upright post 11, reserving a groove on the inner side edge of the end upright post 11 to facilitate the insertion of a prefabricated reinforced concrete panel 30 in the later period, overlapping and binding reinforcement between the end upright posts 11 on two sides to pour to form an anti-collision wall 17, and reserving an expansion head embedded rod 20 of an anti-collision frame 8 during construction;

3) carrying out on-site hoisting and setting construction on the manufactured prefabricated H-shaped piles 13, then casting a strip foundation 14 on a tamping plain soil layer 15 between the prefabricated H-shaped piles 13 in situ, and reserving a groove matched with the prefabricated steel-concrete panel 30 at the top of the strip foundation 14;

4) As shown in fig. 2 and 3, the prefabricated steel-concrete panel 30 is subjected to on-site hoisting construction, the opposite pulling holes 10 are reserved on the prefabricated steel-concrete panel 30, and the reserved positions of the opposite pulling holes 10 are suitable for being in a foam concrete pouring area;

5) as shown in fig. 4 and 5, constructing an inner rammed plain soil layer 15 between strip foundations 14 on two sides, then arranging a water-resisting layer 27 on the inner rammed plain soil layer 15, paving graded broken stones to form a gravel layer 12, embedding a drainage system 18 in a proper time during construction, arranging the drainage system 18 and counter-pull holes 10 at intervals in space, and finally performing counter-pull construction through the counter-pull holes 10 on two sides by using counter-pull rods 29 and bolts 28 to enhance the transverse binding force between prefabricated steel-concrete panels 30;

6) as shown in fig. 6, the foam concrete 6 is poured: when the steel templates are transversely erected, the templates are fixed on the prefabricated H-shaped pile columns 13 and the prefabricated steel-concrete panels 30 on two sides, the positions of the templates are reasonably arranged to form a step shape, a sand layer reduction pit is reserved, a construction joint is arranged in the longitudinal direction of 5-10m of the foam concrete 6 in a filling mode, pouring is controlled according to the thickness of one layer of 0.3-0.8 m, and the top layer is poured to form the step shape;

7) as shown in fig. 7, 8 and 9, after the foam concrete 6 is cured, performing surface layer pouring construction of a leading section 1, a front buffering deceleration section 4 and a top anti-collision section 9, wherein the leading section 1 is connected with a traffic main line and the front buffering deceleration section 4, the top anti-collision section 9 is positioned below an expansion head embedding rod 20 of an anti-collision wall 17, a deceleration strip 33 is arranged during the surface layer pouring construction of the front buffering deceleration section 4, then, the reserved expansion head embedding rod 20 is utilized, an oblique cross rod 19 is welded at the end part of the expansion head embedding rod 20, a cross support 21 is welded between the expansion head embedding rods 20 to form an anti-collision frame 8, and an old tire is bound on the oblique cross rod 19 at the end part of the anti-collision frame 8 by a steel wire to form a tire wall 7;

8) As shown in fig. 1, bolting guardrail bases 2 on the tops of prefabricated H-shaped piles 13, and then installing anti-collision guardrails 3 between the guardrail bases 2;

9) construction of the service lane 31: a certain width is separated on one side of the sand layer speed reduction pit by using a template, and then a concrete pavement is poured on the top of the separated step-shaped foam concrete to form a service lane 31 parallel to the same section of the middle sand loosening speed reduction section 5;

10) as shown in fig. 11, dry and loose sandy soil is selected, the sand-layer decelerating pit is filled with the loose sandy soil to a required thickness according to a designed longitudinal slope, a middle sand-layer decelerating section 5 is formed, and the middle sand-layer decelerating section 5 is positioned between the front buffering decelerating section 4 and the top anti-collision section 9;

11) as shown in fig. 10, the construction of the strong rebound rubber net deceleration system: the anchor nails are arranged on the prefabricated H-shaped piles 13 on the two sides, the strong rebound rubber net 32 is bound on the anchor nails, one or more than one strong tensile force can be arranged on the middle sand layer deceleration section 5 of the strong rebound rubber net 32, and therefore the construction operation of the foam concrete danger avoiding lane is completed.