Bridgehead road structure and method for early warning and repairing bridgehead bumping of the road structure

Abstract

The application discloses a bridge-head road structure and a method for early warning and repairing bridge-head bumping, comprising a roadbed and light foam soil lapped with the roadbed, a coping is arranged on the top of the light foam soil, a main beam is arranged in front of the coping, a bridge abutment pile foundation is arranged below the coping, the bottom of the bridge abutment pile foundation is located in a natural foundation, the upper part of the natural foundation is a strong ramming foundation influence range, a geomembrane, a bamboo-rib plate structure, graded sand, a lean concrete plate, a lap plate and an asphalt pavement are sequentially arranged on the top of the light foam soil behind the coping, a low-dose water-stable layer, a water-stable layer and an asphalt pavement are sequentially arranged on the top of the roadbed. The geomembrane, the bamboo-rib plate structure, the graded sand, the lean concrete plate and the concrete plate form a closed structure body, the bridge-head bumping can be early warned through a gas injection test, and the bridge-head bumping can be repaired through grouting. The road structure is rigid and flexible, simple in structure, capable of delaying the occurrence of bridge-head differential settlement, predicting the time of the generation of the bridge-head bumping and rapidly repairing the bridge-head bumping without blocking traffic.

Description

TECHNICAL FIELD

[0001] The present application relates to a road structure, in particular to a bridgehead road structure. The structure is a road structure capable of early warning of bridgehead bumping and rapid repair of bridgehead bumping. The structure not only can greatly reduce the possibility of bridgehead bumping, but also can provide a method for early warning of bridgehead bumping by judging whether the structure is empty or not, and can repair the bridgehead bumping when the structure is empty. BACKGROUND

[0002] Bridgehead bumping is a phenomenon of vehicle jumping caused by differential settlement of road-bridge connection section, which is more common when the vehicle speed is faster. The bridge abutment backfill is often filled with lime-soil or gravel, and the normal foundation is not treated. In order to slow down the differential settlement, a 5-8m long reinforced concrete apron is often arranged at the road-bridge connection. However, the conventional filler under the apron is prone to obvious plastic or lateral deformation under the long-term action of atmospheric environment and vehicle load. Under the superimposed settlement of roadbed and vehicle load, the bottom of the apron is inevitably separated from the roadbed filler to form a gap or a cavity, which further causes the apron to break and aggravate the occurrence of bridgehead bumping.

[0003] There is little research on the prediction or evaluation of the gap or cavity formed by the separation of the apron bottom from the roadbed filler. The maintenance unit only uses excavation and reconstruction or drilling and grouting repair treatment under the condition of closed or semi-closed traffic when the bridgehead road has obvious disease characteristics. The high engineering cost and traffic congestion are prone to occur, which causes waste of social resources and is not conducive to energy saving and emission reduction.

[0004] Based on the above situation, it is urgent to invent a road structure and construction method which is simple in structure, stable in structure, can delay the occurrence of bridgehead differential settlement, predict the occurrence time of bridgehead bumping, and repair the bridgehead bumping. SUMMARY

[0005] The purpose of the present application is to provide a road structure and construction method which is simple in structure, stable in structure, can delay the occurrence of bridgehead differential settlement, predict the occurrence time of bridgehead bumping, and repair the bridgehead bumping.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is:

[0007] A bridgehead road structure, comprising a roadbed and a light foam soil connected with the roadbed, wherein the connection part of the roadbed and the light foam soil is excavated in a stepped shape, a coping is arranged on the top of the light foam soil, a main beam is arranged in front of the coping, a bridge abutment pile foundation is arranged below the coping, and the bottom of the bridge abutment pile foundation is located in the natural foundation.

[0008] The top of the abutment cap abutment rear lightweight foam soil is provided with a frame structure composed of a bamboo rib plate structure and a concrete plate, the frame structure is wrapped with a geomembrane, the upper part of the geomembrane is left with an opening, the geomembrane is filled with graded sand, the graded sand fills the frame structure, and the roadbed is flush with the frame structure.

[0009] The upper part of the frame structure is provided with a lean concrete plate, the upper part of the lean concrete plate is provided with a lapping plate, the upper part of the roadbed is provided with a low-dose water stable layer, the low-dose water stable layer is flush with the lean concrete plate, the upper part of the low-dose water stable layer is provided with a water stable layer, the water stable layer is flush with the lapping plate, and the water stable layer, the lapping plate and the abutment cap are provided with an asphalt pavement on the top of the main beam.

[0010] Further technologies of the present application:

[0011] Preferably, the roadbed, the lightweight foam soil and the natural foundation are a dynamic compaction foundation.

[0012] Preferably, the frame structure is specifically:

[0013] The geomembrane on the top of the abutment cap abutment rear lightweight foam soil is provided with a bamboo rib plate structure on the upper part, the bamboo rib plate structure is paved with graded sand on the upper part, the graded sand is also provided with a bamboo rib plate structure on the upper part, the top of the graded sand is flush with the top of the bamboo rib plate structure, the bottom, the left side, the right side, the top left part and the top right part of the graded sand are wrapped by the geomembrane, and the front and back sides of the graded sand are closed by the concrete plates with the same height.

[0014] Preferably, the geomembrane, the bamboo rib plate structure, the graded sand, the lean concrete plate and the concrete plate form a closed structure.

[0015] Preferably, the bamboo rib plate structure is specifically:

[0016] The bamboo rib plate structure is composed of horizontal transverse bamboo ribs and horizontal longitudinal bamboo ribs, the horizontal longitudinal bamboo ribs at the left and right ends of the bamboo rib plate structure are composed of a plurality of short bamboo ribs spliced by tee joints, the tee joints horizontally splice the horizontal transverse bamboo ribs through horizontal transverse pipe openings, the horizontal longitudinal bamboo ribs at the left and right ends are wrapped and blocked by the geomembrane in front and back, the horizontal longitudinal bamboo ribs and the horizontal transverse bamboo ribs inside the bamboo rib plate structure are bound by wire in a plum blossom shape, and the surface of the horizontal transverse bamboo ribs is provided with equidistant circular small holes.

[0017] The present application also provides a warning bridgehead bumping method according to the bridgehead road structure.

[0018] Remove the geomembrane in front of the horizontal longitudinal bamboo of the left and right ends of the lower bamboo-ribbed structure, connect the air pump with the horizontal longitudinal bamboo of the left end of the lower bamboo-ribbed structure through the air injection pipe, connect the air pressure gauge with the horizontal longitudinal bamboo of the right end of the lower bamboo-ribbed structure through the air outlet pipe, inject pressure into the bamboo-ribbed structure through the air pump, record the air pressure value when the right side air pressure gauge is stable, after the test is completed, re-wrap the front part of the horizontal longitudinal bamboo of the left and right ends of the lower bamboo-ribbed structure with the geomembrane, measure and record the air pressure value when the air pressure gauge is stable in the same way for the upper bamboo-ribbed structure, measure and record the air pressure stable value before the handover according to the above method, after the handover, measure and record the air pressure stable value of the road structure according to the above method, then take time as the horizontal axis, take the air pressure value as the vertical axis, take the measurement time of the upper and lower bamboo-ribbed structures and the corresponding air pressure stable values as coordinate points to draw curves respectively, the time corresponding to the inflection point appearing first in the two curves drawn is taken as the time point of the bridgehead bump warning of the road structure.

[0019] The application also provides a method for repairing the bridgehead bump of a bridgehead road structure.

[0020] Remove the geomembrane in front of the horizontal longitudinal bamboo of the left and right ends of the lower bamboo-ribbed structure, connect the air pump with the horizontal longitudinal bamboo of the left end of the lower bamboo-ribbed structure through the air injection pipe, connect the air pressure gauge with the horizontal longitudinal bamboo of the right end of the lower bamboo-ribbed structure through the air outlet pipe, inject pressure into the bamboo-ribbed structure through the air pump, record the air pressure value when the right side air pressure gauge is stable, after the test is completed, re-wrap the front part of the horizontal longitudinal bamboo of the left and right ends of the lower bamboo-ribbed structure with the geomembrane, measure and record the air pressure value when the air pressure gauge is stable in the same way for the upper bamboo-ribbed structure, measure and record the air pressure stable value before the handover according to the above method, after the handover, measure and record the air pressure stable value of the road structure according to the above method, then take time as the horizontal axis, take the air pressure value as the vertical axis, take the measurement time of the upper and lower bamboo-ribbed structures and the corresponding air pressure stable values as coordinate points to draw curves respectively, the time corresponding to the inflection point appearing first in the two curves drawn is taken as the time point of the bridgehead bump warning of the road structure, at the time point, remove the geomembrane in front of the horizontal longitudinal bamboo of the left end of the lower bamboo-ribbed structure, connect the horizontal longitudinal bamboo of the left end of the lower bamboo-ribbed structure with the grouting machine through the grouting pipe, start the grouting machine to inject grouting from the horizontal longitudinal bamboo of the left end of the lower bamboo-ribbed structure into the horizontal transverse bamboo of the bamboo-ribbed structure through the tee pipe, then into the void area through the circular small hole on the horizontal transverse bamboo, repair the road structure, after the grouting of the lower bamboo-ribbed structure is completed, re-seal the front part of the horizontal longitudinal bamboo of the left end of the lower bamboo-ribbed structure with the geomembrane, and repair the upper bamboo-ribbed structure again in the same way.

[0021] The application has the following beneficial effects:

[0022] The road structure relates to the advantages of high strength, renewability, wide distribution and low price of bamboo reinforcement, and combines the characteristics of small self-weight, small deformation and energy dissipation of light foam soil to be applied to a roadbed structure at a bridge-head connection, so as to achieve the transition of rigidity and flexibility, delay differential settlement at the bridge-head connection, and the characteristics of early warning and easy repair of the bridge-head bump, the structure is stable and simple to operate, can effectively reduce the differential settlement at the bridge-head connection, improve the stability at the bridge-head connection, quickly repair the bridge-head bump, can be standardized, reduce carbon emissions, and has good economic and technical benefits. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 It is a cross-sectional view of a bridge-head road structure;

[0025] Figure 2 It is a detailed view of the upper part of the road structure;

[0026] Figure 3 It is a schematic view of a bamboo reinforcement plate structure;

[0027] Figure 4 It is a detailed view of the connection of the left end horizontal longitudinal bamboo reinforcement and the horizontal transverse bamboo reinforcement three-way pipe;

[0028] Figure 5 It is a position diagram of graded sand, bamboo reinforcement plate structure, concrete plate and geomembrane;

[0029] Figure 6 It is a schematic view of gas injection early warning bridge-head bump;

[0030] Figure 7 It is a schematic view of grouting repair bridge-head bump.

[0031] In the figure: 1, natural foundation; 2, strong ramming I area foundation influence range; 3, strong ramming II area foundation influence range; 4, roadbed; 5, low-dose water-stable layer; 6, water-stable layer; 7, graded sand; 8, concrete plate; 9, bamboo reinforcement plate structure; 10, lean concrete plate; 11, lap plate; 12, asphalt pavement; 13, main beam; 14, abutment cap; 15, light foam soil; 16, abutment pile foundation; 17, original roadbed slope line; 9-1, horizontal longitudinal bamboo reinforcement; 9-2, horizontal transverse bamboo reinforcement; 9-3, wire; 9-4, three-way pipe; 9-2-1, round small hole; 18, air pump; 19, gas injection pipe; 20, gas outlet pipe; 21, air pressure gauge; 22, grouting machine; 23, grouting pipe; 24, geomembrane. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0033] It should be noted that the words "left", "right", "up" and "down" used in the following description refer to the directions in the drawings.

[0034] As Figure 1 , 2 , Embodiment 1, a bridge head road structure, comprising a subgrade 4 and a light foam soil 15 lapped with the subgrade 4, the lapped part of the subgrade 4 and the light foam soil 15 is excavated into a stepped shape, the top of the original subgrade slope line 17 is aligned with the left end of the lap plate 11, the top of the light foam soil 15 is provided with a abutment cap 14, the front of the abutment cap 14 is provided with a main beam 13, the bottom of the abutment pile foundation 16 is located in the natural foundation 1, the upper part of the natural foundation 1 is the influence range of the dynamic compaction foundation, the influence range of the dynamic compaction foundation is divided into the influence range 2 of the dynamic compaction I area foundation and the influence range 3 of the dynamic compaction II area foundation according to the ramming distance.

[0035] As Figure 1 , 2 , 3, 4, 5, the top of the light foam soil 15 behind the abutment cap 14 is provided with a geomembrane 24, the upper part of the geomembrane 24 is provided with a bamboo reinforcement plate structure 9, the upper part of the bamboo reinforcement plate structure 9 is paved with 40cm thick graded sand 7, the upper part of the graded sand 7 is provided with a bamboo reinforcement plate structure 9, the top of the graded sand 7 is flush with the top of the bamboo reinforcement plate structure 9, the bottom, left side, right side and top left side of the graded sand 7 are wrapped by the geomembrane 24, the top right side of the graded sand 7 is wrapped by the geomembrane 24, the top of the graded sand 7 is 2m to the right, the top right side is 2m to the left, the upper part of the geomembrane 24 is provided with a lean concrete slab 10, the front and back sides of the graded sand 7 are closed by the concrete slab 8 which is the same height as the graded sand 7, the bamboo reinforcement plate structure 9 is composed of horizontal transverse bamboo reinforcement 9-2 and horizontal longitudinal bamboo reinforcement 9-1, the horizontal transverse bamboo reinforcement 9-2 and the horizontal longitudinal bamboo reinforcement 9-1 are made of straight bamboo with a diameter of 2-5cm, the inside is cut through by a water jet, the interval is 50-100cm, the horizontal longitudinal bamboo reinforcement 9-1 at both ends of the bamboo reinforcement plate structure 9 is composed of multiple short bamboo reinforcements spliced by tee pipes 9-4, the tee pipes 9-4 horizontally splice the horizontal transverse bamboo reinforcement 9-2, the horizontal longitudinal bamboo reinforcement 9-1 at both ends is wrapped and sealed by the geomembrane 24 in front and back, the horizontal longitudinal bamboo reinforcement 9-1 and the horizontal transverse bamboo reinforcement 9-2 inside the bamboo reinforcement plate structure 9 are bound in a plum blossom shape by a binding wire 9-3, the surface of the horizontal transverse bamboo reinforcement 9-2 is provided with equidistant circular small holes 9-2-1, the surface of the horizontal longitudinal bamboo reinforcement 9-1 is not provided with circular small holes, the horizontal longitudinal bamboo reinforcement 9-1 at both ends extends 50cm outside the concrete slab 8 in front and back. At the same time, it should be noted that the minimum particle size of the graded sand 7 is greater than the diameter of the circular small hole 9-2-1 on the surface of the horizontal transverse bamboo reinforcement 9-2.

[0036] As Figure 1 , 2 , the upper part of the lean concrete slab 10 is provided with a lapping plate 11, the top surface of the subgrade 4 and the graded sand 7 is flush, the upper part of the subgrade 4 is provided with a low-dosage water-stable layer 5, the low-dosage water-stable layer 5 and the lean concrete slab 10 are flush, the upper part of the low-dosage water-stable layer 5 is provided with a water-stable layer 6, the water-stable layer 6 and the lapping plate 11 are flush, the water-stable layer 6, the lapping plate 11 and the abutment cap 14 are provided with an asphalt pavement 12 on the top of the main beam 13.

[0037] As Figure 6 , 3 , 4, the road structure early warning method is: after the completion of the structure, the geomembrane 24 in front of the horizontal longitudinal bamboo reinforcement 9-1 at both ends of the lower bamboo reinforcement plate structure 9 is removed, the air pump 18 is connected with the horizontal longitudinal bamboo reinforcement 9-1 at the left end of the lower bamboo reinforcement plate structure 9 through the air injection pipe 19, the air pressure gauge 21 is connected with the horizontal longitudinal bamboo reinforcement 9-1 at the right end of the lower bamboo reinforcement plate structure 9 through the air outlet pipe 20, the pressure of 2Mpa is injected into the bamboo reinforcement plate structure 9 through the air pump 18, and the air pressure value when the right air pressure gauge 21 is stable is recorded. After the test is completed, the lower bamboo reinforcement plate structure 9 is wrapped again with the geomembrane 24 in front of the horizontal longitudinal bamboo reinforcement 9-1 at both ends, the upper bamboo reinforcement plate structure 9 is measured and the air pressure value when the air pressure gauge 21 is stable is recorded in the same way. Three months, two months, one month before the delivery and at the time of delivery, the above method is used for measurement and recording of the air pressure stable value. After delivery, the road structure is measured every other month and the air pressure stable value is recorded. Then, taking time as the horizontal axis and air pressure value as the vertical axis, the measurement time of the upper and lower bamboo reinforcement plate structures and the corresponding air pressure stable values are taken as coordinate points to draw curves respectively, the time corresponding to the inflection point appearing first in the two curves is taken as the time point of early warning of the road structure to repair the bridgehead bump, and the repair effect is best at the time point.

[0038] As Figure 7 , 3 , 4, the road structure repair method is: at the early warning time point, the geomembrane 24 in front of the horizontal longitudinal bamboo reinforcement 9-1 at the left end of the lower bamboo reinforcement plate structure 9 is removed, the horizontal longitudinal bamboo reinforcement 9-1 at the left end of the lower bamboo reinforcement plate structure 9 is connected with the grouting machine 22 through the grouting pipe 23, the grouting machine 22 is started to inject grout from the horizontal longitudinal bamboo reinforcement 9-1 at the left end of the lower bamboo reinforcement plate structure 9 into the horizontal transverse bamboo reinforcement 9-2 in the bamboo reinforcement plate structure 9 through the three-way pipe 9-4, and then into the void area through the circular small hole 9-2-1 on the horizontal transverse bamboo reinforcement 9-2 to repair the road structure. After the grouting of the lower bamboo reinforcement plate structure 9 is completed, the front part of the horizontal longitudinal bamboo reinforcement 9-1 at the left end of the lower bamboo reinforcement plate structure 9 is sealed again with the geomembrane 24, and the upper bamboo reinforcement plate structure 9 is grouted again in the same way. The grout used for grouting is a fast-hardening material, and the traffic can not be blocked during the repair process of the bridgehead bump.

[0039] Embodiment 2, the application also provides a bridgehead road structure construction method, the main steps of the construction method are as follows:

[0040] 1) Site leveling, measurement and lofting.

[0041] 2) Determine the foundation influence range 2 of strong compaction I area and the foundation influence range 3 of strong compaction II area, the foundation influence range 2 of strong compaction I area starts from the left side of the abutment pile 16 in the width direction, extends 2m to the roadbed 4 in the direction of the design length of the lap plate 11, and ends at this position, which is also the starting position of the foundation influence range 3 of strong compaction II area. According to the “Highway Subgrade Design Specification (JTG D30-2015)”, the transition section length L of the embankment and the abutment is (2-3)H+(3-5), wherein H is the height of the roadbed fill (m), and the end position of the foundation influence range 3 of strong compaction II area is determined according to the formula.

[0042] 3) Strong compaction machinery access, respectively, strong compaction I area and strong compaction II area are carried out, wherein the compaction distance of strong compaction I area is smaller than that of strong compaction II area, and the ground is leveled after strong compaction is completed.

[0043] 4) If Figure 1 , the roadbed 4 is rolled in layers, and impact rolling reinforcement is performed every 2m thick until the top surface of the roadbed 4, the original roadbed slope line 17 of the roadbed 4 has a slope ratio of 1:1.5, and the roadbed 4 is excavated into a stepped shape with a slope ratio of 1:1 at a horizontal distance of more than 3m from the design position of the abutment pile 16.

[0044] 5) According to the design, the abutment pile 16 is constructed, and the formwork is set up to pour the abutment cap 14.

[0045] 6) If Figure 2 , 3 , 4, the bamboo reinforcement plate structure 9 is prefabricated according to the design size: long straight and short straight bamboo reinforcement with a diameter of 2-5cm is selected, the inside of the bamboo reinforcement is cut through with a water jet, and the horizontal longitudinal bamboo reinforcement 9-1 at both ends is composed of multiple short straight bamboo reinforcements spliced by three-way pipes 9-4. The three-way pipes 9-4 horizontally splice the horizontal transverse bamboo reinforcement 9-2, the surface of the horizontal transverse bamboo reinforcement 9-2 is provided with circular small holes 9-2-1 at equal intervals around, and the internal horizontal longitudinal bamboo reinforcement 9-1 and the horizontal transverse bamboo reinforcement 9-2 are bound at every other binding point by binding wire 9-3.

[0046] 7) If Figure 1 , 2 , the light foam soil 15 formwork is set up according to the design size, the light foam soil 15 between the roadbed 4 and the abutment pile 16 is poured, and the top of the light foam soil 15 is 40cm lower than the top surface of the roadbed 4.

[0047] 8) If Figure 2 , 3, 5, after the lightweight foam soil 15 is hardened, the geomembrane 24 is laid on the top of the lightweight foam soil 15 behind the abutment cap 14, the geomembrane 24 is 2.4m longer than the geomembrane 24 on the top of the lightweight foam soil 15 behind the abutment cap 14 at the left and right ends, the bamboo-rib-shaped structure 9 is arranged on the upper part of the geomembrane 24 on the top of the lightweight foam soil 15, then the concrete slab 8 template is erected according to the design size and the horizontal longitudinal bamboo ribs 9-1 at the front and rear ends of the bamboo-rib-shaped structure 9 at the left and right ends are projected out of the hole of the concrete slab 8, at the same time, the template is erected, the 0.4m geomembrane of the 2.4m geomembrane laid on the top of the lightweight foam soil 15 behind the abutment cap 14 which is longer than the left end of the top of the lightweight foam soil 15 behind the abutment cap 14 is vertically arranged and connected with the roadbed 4, the 0.4m geomembrane of the 2.4m geomembrane laid on the top of the lightweight foam soil 15 behind the abutment cap 14 which is longer than the right end of the top of the lightweight foam soil 15 behind the abutment cap 14 is vertically arranged and connected with the abutment cap 14, the concrete slab 8 is poured, after the concrete slab 8 is hardened, the graded sand 7 is laid and a layer of bamboo-rib-shaped structure 9 is arranged on the upper part of the graded sand 7, the graded sand 7 is laid in the internal frame of the bamboo-rib-shaped structure 9 until the top of the bamboo-rib-shaped structure 9, and the remaining 2m geomembrane of the 2.4m geomembrane at the left and right ends of the geomembrane 24 which is longer than the left and right ends of the top of the lightweight foam soil 15 behind the abutment cap 14 is wrapped above the graded sand 7. The front and rear parts of the horizontal longitudinal bamboo ribs 9-1 at the left and right ends of the bamboo-rib-shaped structure 9 on the upper and lower parts of the graded sand 7 are projected out of the part of the concrete slab 8, and the part of the concrete slab 8 is blocked by the geomembrane 24, and the graded sand 7 is flush with the top of the roadbed 4.

[0048] 9) As Figure 1 , 2 , the low-dose water-stable layer 5 is arranged on the top of the roadbed 4, the water-stable layer 6 is arranged on the top of the low-dose water-stable layer 5, the graded sand 7 is arranged on the top of the water-stable layer 6, the lean concrete slab 10 is arranged on the top of the graded sand 7, and the battens 11 are arranged on the top of the lean concrete slab 10. The water-stable layer 6 and the battens 11 are arranged on the top of the abutment cap 14 and the main beam 13, and the asphalt pavement 12 is arranged on the top of the abutment cap 14 and the main beam 13.

[0049] 10) As Figure 6 , 3, 4, after the construction is completed, the geomembrane 24 in front of the horizontal longitudinal bamboo rib 9-1 at the left and right ends of the lower bamboo rib plate structure 9 is removed, the air pump 18 is connected with the horizontal longitudinal bamboo rib 9-1 at the left end of the lower bamboo rib plate structure 9 through the air injection pipe 19, the air pressure gauge 21 is connected with the horizontal longitudinal bamboo rib 9-1 at the right end of the lower bamboo rib plate structure 9 through the air outlet pipe 20, the pressure of 2Mpa is injected into the bamboo rib plate structure 9 through the air pump 18, and the air pressure value when the right air pressure gauge 21 is stable is recorded. After the test is completed, the lower bamboo rib plate structure 9 is wrapped again with the geomembrane 24 in front of the horizontal longitudinal bamboo rib 9-1 at the left and right ends, the upper bamboo rib plate structure 9 is measured in the same way and the air pressure value when the air pressure gauge 21 is stable is recorded. In the three months, two months, one month before the delivery and at the time of delivery, the measurement is carried out in the above-mentioned method and the air pressure stable value is recorded. After the delivery, the measurement is carried out every other month and the air pressure stable value is recorded. Then, taking time as the horizontal axis, taking air pressure value as the vertical axis, taking the measurement time of the upper and lower bamboo rib plate structures and the corresponding air pressure stable values as coordinate points, two curves are drawn respectively, the time corresponding to the inflection point appearing first in the two curves is taken as the time point of the early warning bridgehead bump of the road structure, and the repair effect is best at the time point.

[0050] 11) as Figure 7 、 3 , 4, the geomembrane 24 in front of the horizontal longitudinal bamboo rib 9-1 at the left end of the lower bamboo rib plate structure 9 is removed, the horizontal longitudinal bamboo rib 9-1 at the left end of the lower bamboo rib plate structure 9 is connected with the grouting machine 22 through the grouting pipe 23, the grouting machine 22 is started, grouting is carried out from the horizontal longitudinal bamboo rib 9-1 at the left end of the lower bamboo rib plate structure 9, enters the horizontal transverse bamboo rib 9-2 in the bamboo rib plate structure 9 through the tee pipe 9-4, and then enters the void area through the circular small hole 9-2-1 on the horizontal transverse bamboo rib 9-2, so as to repair the road structure. After the grouting of the lower bamboo rib plate structure 9 is completed, the front part of the horizontal longitudinal bamboo rib 9-1 at the left end of the lower bamboo rib plate structure 9 is sealed again with the geomembrane 24, and the upper bamboo rib plate structure 9 is grouted again in the same way.

[0051] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A bridgehead road structure, characterized by: The bridge head road structure comprises a roadbed and light foam soil lapped with the roadbed, the roadbed is excavated into a stepped shape at the lapped position with the light foam soil, a coping is arranged on the top of the light foam soil, a main beam is arranged in front of the coping, and a abutment pile foundation is arranged below the coping, and the bottom of the abutment pile foundation is located in a natural foundation; The top of the light foam soil behind the coping is composed of a frame structure of a bamboo-rib plate structure and a concrete plate, and the frame structure specifically comprises: A geomembrane is arranged on the top of the light foam soil behind the coping, a bamboo-rib plate structure is arranged on the upper portion of the geomembrane, graded sand is arranged on the upper portion of the bamboo-rib plate structure, a bamboo-rib plate structure is also arranged on the upper portion of the graded sand, the top of the graded sand is flush with the top of the bamboo-rib plate structure, and the bottom, the left side, the right side, the left side portion on the top and the right side portion on the top of the graded sand are wrapped by the geomembrane, and the front and back sides of the graded sand are closed by concrete plates with the same height as the graded sand; The bamboo-rib plate structure specifically comprises: The bamboo-rib plate structure is composed of horizontal transverse bamboo ribs and horizontal longitudinal bamboo ribs, the horizontal longitudinal bamboo ribs at the left and right ends of the bamboo-rib plate structure are composed of a plurality of short bamboo ribs spliced by tee joints, the tee joints horizontally splice the horizontal transverse bamboo ribs through horizontal transverse pipe openings, the horizontal longitudinal bamboo ribs at the left and right ends are wrapped and blocked by geomembranes in front and back, the horizontal longitudinal bamboo ribs and the horizontal transverse bamboo ribs inside the bamboo-rib plate structure are bound in a plum blossom shape by binding wires, and the horizontal transverse bamboo ribs are provided with equidistant circular small holes on the surfaces thereof; The roadbed is flush with the frame structure, a lean concrete plate is arranged on the upper portion of the frame structure, and the geomembrane, the bamboo-rib plate structure, the graded sand, the lean concrete plate and the concrete plate form a closed structure, a lap plate is arranged on the upper portion of the lean concrete plate, a low-dose water stable layer is arranged on the upper portion of the roadbed, the low-dose water stable layer is flush with the lean concrete plate, a water stable layer is arranged on the upper portion of the low-dose water stable layer, the water stable layer is flush with the lap plate, and the water stable layer, the lap plate, the coping and the main beam are provided with an asphalt pavement on the top.

2. A bridgehead road structure as claimed in claim 1, characterised in that: The roadbed, the light foam soil and the natural foundation are a dynamic compaction foundation.

3. The method according to any one of claims 1-2, characterized in that: The geomembrane is removed from the front part of the horizontal longitudinal bamboo reinforcement at the left and right ends of the lower bamboo-ribbed structure, the air pump is connected to the horizontal longitudinal bamboo reinforcement at the left end of the lower bamboo-ribbed structure through the air injection pipe, the air pressure gauge is connected to the horizontal longitudinal bamboo reinforcement at the right end of the lower bamboo-ribbed structure through the air outlet pipe, the pressure is injected into the bamboo-ribbed structure through the air pump, the air pressure value when the right side air pressure gauge is stable is recorded, after the test is completed, the front part of the horizontal longitudinal bamboo reinforcement at the left and right ends of the lower bamboo-ribbed structure is wrapped with the geomembrane again, the upper bamboo-ribbed structure is measured and the air pressure value when the air pressure gauge is stable is recorded in the same way, before the handover, the air pressure stable value is measured and recorded according to the above method periodically and at the time of the handover, after the handover, the air pressure stable value is measured and recorded according to the above method periodically for the road structure, then the time is taken as the horizontal axis, the air pressure value is taken as the vertical axis, the measurement time of the upper and lower bamboo-ribbed structures and the corresponding air pressure stable values are taken as coordinate points, and curves are drawn respectively, the time corresponding to the inflection point appearing first in the two curves is taken as the time point of the early warning of the bridgehead bump of the road structure.

4. The method for repairing the bridgehead bump of the bridgehead road structure according to any one of claims 1-2, characterized in that: The geomembrane is removed from the front part of the horizontal longitudinal bamboo reinforcement at the left and right ends of the lower bamboo-ribbed structure, the air pump is connected to the horizontal longitudinal bamboo reinforcement at the left end of the lower bamboo-ribbed structure through the air injection pipe, the air pressure gauge is connected to the horizontal longitudinal bamboo reinforcement at the right end of the lower bamboo-ribbed structure through the air outlet pipe, the pressure is injected into the bamboo-ribbed structure through the air pump, the air pressure value when the right side air pressure gauge is stable is recorded, after the test is completed, the front part of the horizontal longitudinal bamboo reinforcement at the left and right ends of the lower bamboo-ribbed structure is wrapped with the geomembrane again, the upper bamboo-ribbed structure is measured and the air pressure value when the air pressure gauge is stable is recorded in the same way, before the handover, the air pressure stable value is measured and recorded according to the above method periodically and at the time of the handover, after the handover, the air pressure stable value is measured and recorded according to the above method periodically for the road structure, then the time is taken as the horizontal axis, the air pressure value is taken as the vertical axis, the measurement time of the upper and lower bamboo-ribbed structures and the corresponding air pressure stable values are taken as coordinate points, and curves are drawn respectively, the time corresponding to the inflection point appearing first in the two curves is taken as the time point of the early warning of the bridgehead bump of the road structure, at the time point, the geomembrane is removed from the front part of the horizontal longitudinal bamboo reinforcement at the left end of the lower bamboo-ribbed structure, the horizontal longitudinal bamboo reinforcement at the left end of the lower bamboo-ribbed structure is connected to the grouting machine through the grouting pipe, the grouting machine is started to inject grout from the horizontal longitudinal bamboo reinforcement at the left end of the lower bamboo-ribbed structure into the horizontal transverse bamboo reinforcement of the bamboo-ribbed structure through the tee pipe, and then into the void area through the circular small hole on the horizontal transverse bamboo reinforcement, the road structure is repaired, after the grouting of the lower bamboo-ribbed structure is completed, the front part of the horizontal longitudinal bamboo reinforcement at the left end of the lower bamboo-ribbed structure is sealed with the geomembrane again, and the upper bamboo-ribbed structure is grouted again according to the same method.

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