Embedded part for preventing and controlling arch expansion of water-stable base layer

Abstract

The utility model provides an embedded part for preventing and treating arch expansion of a water-stable base layer, and belongs to the technical field of prevention and treatment of arch expansion of the water-stable base layer. The embedded part for preventing and controlling arch expansion of the cement-stabilized base layer comprises an elastic body and two L-shaped latch supports, the top of the elastic body is flush with the tops of the L-shaped latch supports, the L-shaped latch supports are L-shaped, a plurality of clamping seats are arranged on the surfaces of the L-shaped latch supports, the elastic body is rectangular, and the clamping seats are arranged on the surfaces of the elastic body. And the two L-shaped latch brackets and the elastic body are spliced to form a convex shape. According to the utility model, the elastic body is arranged, so that a worker can obtain the axial compressive strength according to the grading type of the cement-stabilized base mixture, and the axial compressive strength of the cement-stabilized base mixture can be obtained by calculating the temperature stress of the cement-stabilized base at different embedding intervals under the condition of different hole gaps on the basis of the principle that the temperature stress of the base is not greater than the axial compressive strength of the grading mixture. Therefore, the distance between the embedded parts can be accurately known.

Description

Technical Field

[0001] The utility model relates to the technical field of preventing and controlling the arching of the water-stable base course, and more specifically, to an embedded part for preventing and controlling the arching of the water-stable base course. Background Technique

[0002] The arching of the water-stable base course will damage the integrity and stability of the road structure. For example, cracks and looseness may occur in the arching part, which will further affect the bearing capacity of the entire road surface, resulting in premature damage to the road, shortening its service life, and increasing the costs of maintenance and reconstruction. Therefore, preventing and controlling the arching of the water-stable base course is an important means to ensure the road quality and service life, and it is generally achieved through material control of the embedded parts and optimization of the base structure design.

[0003] When the existing embedded parts are buried, their burial spacing has a great impact on the base course. If the temperature stress of the water-stable base course with different burial spacings is greater than the axial compressive strength of the water-stable material, the base course will arch and crack, seriously affecting the integrity and stability of the road structure. Content of the Utility Model

[0004] To make up for the above deficiencies, the utility model provides an embedded part for preventing and controlling the arching of the water-stable base course, which can overcome the above technical problems or at least partially solve the above problems.

[0005] The utility model is implemented as follows:

[0006] The utility model provides an embedded part for preventing and controlling the arching of the water-stable base course, including an elastomer and two L-shaped toothed brackets. The top of the elastomer is flush with the top of the L-shaped toothed brackets. The L-shaped toothed brackets are L-shaped. The surface of the L-shaped toothed brackets is provided with a plurality of clamping seats. The elastomer is rectangular. The shape formed by combining the two L-shaped toothed brackets and the elastomer is convex.

[0007] In a preferred embodiment, the width of the combined L-shaped toothed brackets and the elastomer is 104 cm, the lengths of the L-shaped toothed brackets and the elastomer are both 12 m, and the heights of the L-shaped toothed brackets and the elastomer are both 32 cm.

[0008] In a preferred embodiment, the width of the elastomer is 40 - 16 cm, and the width of the combined elastomer and the two L-shaped toothed brackets is 60 cm.

[0009] In a preferred embodiment, the length and width of the clamping seats are both 8 cm, the height of the clamping seats is 4 cm, and the distance between adjacent clamping seats is 20 cm.

[0010] In a preferred embodiment, the distance between the front side of the frontmost card seat and the front side of the L-shaped tooth holder is 26 cm, and the distance between the side of the card seat close to the elastomer and the inner wall of the L-shaped tooth holder is 7 cm.

[0011] In a preferred embodiment, the L-shaped tooth holder is made of PA46 material, and the elastomer is made of rubber with voids.

[0012] A pre-embedded part for preventing and controlling the swelling of the water-stable base provided by the present utility model has the following beneficial effects:

[0013] 1. By providing an elastomer, the staff can obtain the axial compressive strength based on the gradation type of the cement-stabilized base mixture, and calculate the temperature stress of the water-stable base at different burial spacings under different pore gap conditions. Based on the principle that the base temperature stress is not greater than the axial compressive strength of the graded mixture, the spacing between the pre-embedded parts can be accurately known. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 is a schematic diagram of the overall structure provided by the embodiment of the present utility model;

[0016] Figure 2 is a schematic diagram of the elastomer provided by the embodiment of the present utility model;

[0017] Figure 3 is a schematic diagram of the pre-embedded spacing of CC2-A type and the base temperature stress provided by the embodiment of the present utility model;

[0018] Figure 4 is a schematic diagram of the pre-embedded spacing of CC2-A type and the swelling displacement provided by the embodiment of the present utility model;

[0019] Figure 5 is a schematic diagram of the pre-embedded spacing of CC2-B type and the base temperature stress provided by the embodiment of the present utility model;

[0020] Figure 6 is a schematic diagram of the pre-embedded spacing of CC2-B type and the swelling displacement provided by the embodiment of the present utility model;

[0021] Figure 7 is a schematic diagram of the pre-embedded spacing of CC2-C type and the base temperature stress provided by the embodiment of the present utility model;

[0022] Figure 8 It is a schematic diagram of the embedded distance and arch displacement of the CC2-C type provided by the embodiment of the present utility model;

[0023] Figure 9 It is a schematic diagram of the embedded distance and base temperature stress of the CC2-D type provided by the embodiment of the present utility model;

[0024] Figure 10 It is a schematic diagram of the embedded distance and arch displacement of the CC2-D type provided by the embodiment of the present utility model;

[0025] Figure 11 It is a schematic diagram of the embedded distance and base temperature stress of the CC3 type provided by the embodiment of the present utility model;

[0026] Figure 12 It is a schematic diagram of the embedded distance and arch displacement of the CC3 type provided by the embodiment of the present utility model;

[0027] Figure 13 It is a schematic diagram of the embedded distance and base temperature stress of the C-B-3 type provided by the embodiment of the present utility model;

[0028] Figure 14 It is a schematic diagram of the embedded distance and arch displacement of the C-B-3 type provided by the embodiment of the present utility model.

[0029] In the figure: 1. Elastomer; 2. L-shaped tooth bracket; 3. Card seat. Specific embodiments

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] Refer to Figures 1-14, the present utility model provides a technical solution: an embedded part for preventing and controlling the arching of the water-stable base layer, including an elastomer 1 and two L-shaped tooth bracket 2. The top of the elastomer 1 is flush with the top of the L-shaped tooth bracket 2. The L-shaped tooth bracket 2 is in an L shape. The surface of the L-shaped tooth bracket 2 is provided with a plurality of clamping seats 3. The elastomer 1 is in a rectangular shape. The shape formed by the combination of the two L-shaped tooth brackets 2 and the elastomer 1 is convex. The width of the combination of the L-shaped tooth bracket 2 and the elastomer 1 is 104 cm. The lengths of the L-shaped tooth bracket 2 and the elastomer 1 are both 12 m. The heights of the L-shaped tooth bracket 2 and the elastomer 1 are both 32 cm. The width of the elastomer 1 is 40 - 16 cm. The width of the combination of the elastomer 1 and the two L-shaped tooth brackets 2 is 60 cm. The length and width of the clamping seat 3 are both 8 cm. The height of the clamping seat 3 is 4 cm. The distance between adjacent clamping seats 3 is 20 cm. The distance between the front side of the frontmost clamping seat 3 and the front side of the L-shaped tooth bracket 2 is 26 cm. The distance between the side of the clamping seat 3 close to the elastomer 1 and the inner wall of the L-shaped tooth bracket 2 is 7 cm. The L-shaped tooth bracket 2 is made of PA46 material, and the elastomer 1 is made of rubber with voids. By setting the elastomer 1, since the elastomer 1 uses rubber with pores and is selected as the design of the embedded part, the following table shows the structural forms with different porosity ratios;

[0032]

[0033] Referring to Figure 2 , taking the porosity ratio of 3.9% as an example, the structural form of the elastomer 1 is as follows:

[0034] A: The width of the elastomer 1 is taken as 400 mm;

[0035] B: The width margin of the elastomer 1 is taken as 38 mm;

[0036] C: The center distance of the width of the elastomer 1 is taken as 36 mm;

[0037] D: The height of the elastomer 1 is taken as 320 mm;

[0038] E: The height margin of the elastomer 1 is taken as 34 mm;

[0039] F: The center distance of the height of the elastomer 1 is taken as 28 mm.

[0040] Hole diameter: 8 mm, arranged in 10 × 10.

[0041] In the application of the embedding method, mainly according to the grading type and axial compressive strength (MPa) of the cement-stabilized base mixture, the embedding spacing of the embedded part is selected.

[0042] According to the designed grading of the highway cement-stabilized base mixture, the axial compressive strength of the cement-stabilized base specimens with different gradings and the same cement dosage can be obtained, as shown in the following table;

[0043]

[0044] If the temperature stress of the water-stabilized base with different embedding spacings is greater than the axial compressive strength of the water-stabilized material, the base will bulge and crack. If the temperature stress of this layer is less than the axial compressive strength of the water-stabilized material, the base will not bulge and crack.

[0045] For the built roads, the gradation of the water-stabilized base material has been determined. The appropriate embedding spacing of the embedded parts can be selected by comparing the axial compressive strength of the graded mixture according to the gradation of the water-stabilized base material and the temperature stress of the base at the maximum temperature difference.

[0046] Taking the first section of the 219-line in Aheqi as an example, after one year of operation of this section, slight arching began to appear in some sections. If the pre-embedding method is used for treatment, the embedding spacing of the embedded parts can be selected according to the gradation of the mixture and calculating the temperature stress of the base at the maximum temperature difference of this section.

[0047] 1. For the CC2-A graded water-stabilized material:

[0048] The temperature stress (MPa) of the base at different embedding spacings should be analyzed according to the void ratio of elastomer 1 (such as 12.03%, 5.6%, 3.9%). Then, according to the principle that "the temperature stress (MPa) of the base is not greater than the axial compressive strength of the graded mixture", the spacing between the embedded parts during the actual arching treatment is selected.

[0049] CC2-A pre-embedding method scheme selection - void ratio 3.9%

[0050]

[0051] CC2-A pre-embedding method scheme selection - void ratio 5.6%

[0052]

[0053]

[0054] CC2-A pre-embedding method scheme selection - void ratio 12.03%

[0055]

[0056] Refer to Figures 3-4 , the axial compressive strength of the CC2-A graded water-stabilized material is: 3.4 MPa.

[0057] From the perspectives of arching treatment and economy:

[0058] ① The spacing between the embedded parts is taken as 200 meters:

[0059] (1) The void ratio of the embedded part elastomer 1 is taken as 12.03%. At this time, the temperature stress of the base layer at the maximum temperature difference is about 2.550 MPa, which is less than the axial compressive strength of 3.4 MPa.

[0060] (2) The void ratio of the embedded part elastomer 1 is taken as 5.6 (%). At this time, the temperature stress of the base layer at the maximum temperature difference is about 2.253 MPa, which is less than the axial compressive strength of 3.4 MPa.

[0061] (3) The void ratio of the embedded part elastomer 1 is taken as 3.9 (%). At this time, the temperature stress of the base layer at the maximum temperature difference is about 2.253 MPa, which is less than the axial compressive strength of 3.4 MPa.

[0062] At this time, the arch expansion displacement conditions (theoretical maximum values) are respectively: about 1.3642 cm, 0.966 cm and 0.966 cm, slightly higher or less than the flatness requirements for the stable base layer in the specifications (the flatness for expressways and first-class highways, and other grade highways is 0.8 and 1.2 cm).

[0063] ② The spacing of the embedded parts is taken as 150 m:

[0064] (1) The void ratio of the embedded part elastomer 1 is taken as 12.03%. At this time, the temperature stress of the base layer at the maximum temperature difference is about 2.223 MPa, which is less than the axial compressive strength of 3.4 MPa.

[0065] (2) The void ratio of the embedded part elastomer 1 is taken as 5.6 (%). At this time, the temperature stress of the base layer at the maximum temperature difference is about 2.223 MPa, which is less than the axial compressive strength of 3.4 MPa.

[0066] (3) The void ratio of the embedded part elastomer 1 is taken as 3.9 (%). At this time, the temperature stress of the base layer at the maximum temperature difference is about 2.172 MPa, which is less than the axial compressive strength of 3.4 MPa.

[0067] At this time, the arch expansion displacement conditions (theoretical maximum values) are respectively: about 0.964 cm, 0.964 cm and 0.962 cm, slightly higher or less than the flatness requirements for the stable base layer in the specifications (the flatness for expressways and first-class highways, and other grade highways is 0.8 and 1.2 cm).

[0068] 2. For the CC2-B graded water-stable material:

[0069] CC2-B Embedded Method Scheme Selection - Void Ratio 3.9%

[0070]

[0071]

[0072] CC2-B Embedded Method Scheme Selection - Void Ratio 5.6%

[0073]

[0074] CC2-B Embedded Method Scheme Selection - Void Ratio 12.03%

[0075]

[0076] Refer to Figures 5-6 , the axial compressive strength of the water-stable material CC2-B gradation is: 2.8 MPa. From the perspectives of arch heave treatment and economy:

[0077] ① The spacing of the embedded parts is taken as 200 meters:

[0078] (1) The void ratio of the embedded part elastomer 1 is taken as 12.03%, and at this time, the temperature stress of the base layer at the maximum temperature difference is about 2.499 MPa, which is less than the axial compressive strength of 2.8 MPa.

[0079] (2) The void ratio of the embedded part elastomer 1 is taken as 5.6 (%), and at this time, the temperature stress of the base layer at the maximum temperature difference is about 2.202 MPa, which is less than the axial compressive strength of 2.8 MPa.

[0080] (3) The void ratio of the embedded part elastomer 1 is taken as 3.9 (%), and at this time, the temperature stress of the base layer at the maximum temperature difference is about 2.222 MPa, which is less than the axial compressive strength of 2.8 MPa.

[0081] At this time, the arch heave displacement conditions (theoretical maximum values) are respectively: about 1.372 cm, 0.966 cm, and 0.966 cm, slightly higher or less than the flatness requirements for the stable base layer of the specification (the flatness for expressways and first-class highways, and other grade highways are 0.8 and 1.2 cm).

[0082] ② The spacing of the embedded parts is taken as 150 meters:

[0083] (1) The void ratio of the embedded part elastomer 1 is taken as 12.03%, and at this time, the temperature stress of the base layer at the maximum temperature difference is about 2.193 MPa, which is less than the axial compressive strength of 2.8 MPa.

[0084] (2) The void ratio of the embedded part elastomer 1 is taken as 5.6 (%), and at this time, the temperature stress of the base layer at the maximum temperature difference is about 2.173 MPa, which is less than the axial compressive strength of 2.8 MPa.

[0085] (3) The void ratio of the embedded part elastomer 1 is taken as 3.9 (%), and at this time, the temperature stress of the base layer at the maximum temperature difference is about 2.154 MPa, which is less than the axial compressive strength of 2.8 MPa.

[0086] At this time, the bulging displacement (theoretical maximum value) is: 0.964 cm. Slightly higher or lower than the flatness requirements for the stable base layer in the specifications (the flatness for expressways and first-class highways, and other graded highways is 0.8 and 1.2 cm).

[0087] 3. For the CC2-C graded water-stable material:

[0088] CC2-C Embedded Method Scheme Selection - Void Ratio 3.9%

[0089]

[0090]

[0091] CC2-C Embedded Method Scheme Selection - Void Ratio 5.6%

[0092]

[0093] CC2-C Embedded Method Scheme Selection - Void Ratio 12.03%

[0094]

[0095] Refer to Figures 7-8 The axial compressive strength of the CC2-C graded water-stable material is: 2.6 MPa.

[0096] From the perspectives of bulging treatment and economy:

[0097] ① The spacing of the embedded parts is taken as 200 meters:

[0098] (1) The void ratio of the elastomer 1 of the embedded part is taken as 12.03%. At this time, the temperature stress of the base layer at the maximum temperature difference is about 2.441 MPa, which is less than the axial compressive strength of 2.6 MPa.

[0099] (2) The void ratio of the elastomer 1 of the embedded part is taken as 5.6 (%). At this time, the temperature stress of the base layer at the maximum temperature difference is about 2.144 MPa, which is less than the axial compressive strength of 2.6 MPa.

[0100] (3) The void ratio of the elastomer 1 of the embedded part is taken as 3.9 (%). At this time, the temperature stress of the base layer at the maximum temperature difference is about 2.143 MPa, which is less than the axial compressive strength of 2.6 MPa.

[0101] At this time, the bulging displacement (theoretical maximum value) is: 0.965 cm. Slightly higher or lower than the flatness requirements for the stable base layer in the specifications (the flatness for expressways and first-class highways, and other graded highways is 0.8 and 1.2 cm).

[0102] ② The spacing of the embedded parts is taken as 150 meters:

[0103] (1) The void ratio of the embedded part elastomer 1 is taken as 12.03%. At this time, the temperature stress of the base layer at the maximum temperature difference is about 2.116 MPa, which is less than the axial compressive strength of 2.6 MPa.

[0104] (2) The void ratio of the embedded part elastomer 1 is taken as 5.6 (%). At this time, the temperature stress of the base layer at the maximum temperature difference is about 2.116 MPa, which is less than the axial compressive strength of 2.6 MPa.

[0105] (3) The void ratio of the embedded part elastomer 1 is taken as 3.9 (%). At this time, the temperature stress of the base layer at the maximum temperature difference is about 2.093 MPa, which is less than the axial compressive strength of 2.6 MPa.

[0106] At this time, the arching displacement conditions (theoretical maximum values) are respectively: about 0.963 cm, 0.964 cm and 0.963 cm, slightly higher or less than the flatness requirements for the stable base layer in the specifications (the flatness for expressways and first-class highways, and other grade highways is 0.8 and 1.2 cm).

[0107] 4. For the CC2-D graded water-stable material:

[0108] CC2-D Embedded Method Scheme Selection - Void Ratio 3.9%

[0109]

[0110] CC2-D Embedded Method Scheme Selection - Void Ratio 5.6%

[0111]

[0112] CC2-D Embedded Method Scheme Selection - Void Ratio 12.03%

[0113]

[0114]

[0115] Refer to Figures 9-10 , the axial compressive strength of the CC2-D graded water-stable material is: 2.7 MP.

[0116] From the perspective of arching treatment and economy: the spacing of the embedded parts is taken as 50 meters:

[0117] (1) The void ratio of the embedded part elastomer 1 is taken as 12.03%. At this time, the temperature stress of the base layer at the maximum temperature difference is about 2.239 MPa, which is less than the axial compressive strength of 2.7 MPa.

[0118] (2) The void ratio of the embedded part elastomer 1 is taken as 5.6 (%). At this time, the temperature stress of the base layer at the maximum temperature difference is about 2.44 MPa, which is less than the axial compressive strength of 2.7 MPa.

[0119] (3) The void ratio of the embedded part elastomer 1 is taken as 3.9 (%), and at this time, the temperature stress of the base layer at the maximum temperature difference is about 2.424 MPa, which is less than the axial compressive strength of 2.7 MPa.

[0120] At this time, the arching displacement conditions (theoretical maximum values) are respectively: about 0.791 cm, 0.80 cm, and 0.80 cm, all of which are less than or equal to the flatness requirements for the stable base layer in the specifications (the flatness for expressways and first-class highways, and other grade highways is 0.8 cm and 1.2 cm).

[0121] 4. For CC3 graded water-stabilized materials:

[0122] CC3 Embedded Method Scheme Selection - Void Ratio 3.9%

[0123]

[0124]

[0125] CC3 Embedded Method Scheme Selection - Void Ratio 5.6%

[0126]

[0127] CC3 Embedded Method Scheme Selection - Void Ratio 12.03%

[0128]

[0129] Refer to Figures 11-12 , the axial compressive strength of the CC3 graded water-stabilized material is: 2.4 MP.

[0130] From the perspectives of arching treatment and economy: the spacing of the embedded parts is taken as 50 meters:

[0131] (1) The void ratio of the embedded part elastomer 1 is taken as 12.03%, and at this time, the temperature stress of the base layer at the maximum temperature difference is about 2.135 MPa, which is less than the axial compressive strength of 2.4 MPa. Less than the axial compressive strength of 2.4 MP.

[0132] (2) The void ratio of the embedded part elastomer 1 is taken as 5.6 (%), and at this time, the temperature stress of the base layer at the maximum temperature difference is about 2.336 MPa, which is less than the axial compressive strength of 2.4 MPa.

[0133] (3) The void ratio of the embedded part elastomer 1 is taken as 3.9 (%), and at this time, the temperature stress of the base layer at the maximum temperature difference is about 2.346 MPa, which is less than the axial compressive strength of 2.4 MPa.

[0134] At this time, the arching displacement conditions (theoretical maximum values) are respectively: about 0.791 cm, 0.80 cm and 0.80 cm, all of which are less than or equal to the flatness requirements for the stable base course in the specifications (the flatness for expressways and first-class highways, and other grade highways is 0.8 cm and 1.2 cm).

[0135] 5. For C-B-3 graded water-stable material: (refer to the Hetian section of Mohe Expressway)

[0136] C-B-3 Embedded Method Scheme Selection - Void Ratio 3.9%

[0137]

[0138] C-B-3 Embedded Method Scheme Selection - Void Ratio 5.6%

[0139]

[0140]

[0141] C-B-3 Embedded Method Scheme Selection - Void Ratio 12.03%

[0142]

[0143] Refer to Figures 13-14 , the axial compressive strength of the C-B-2 graded water-stable material is: 3.5 MP.

[0144] From the perspectives of arching treatment and economy:

[0145] ① The spacing of the embedded parts is taken as 250 m:

[0146] (1) The void ratio of the elastomer 1 of the embedded part is taken as 12.03%. At this time, the temperature stress of the base course at the maximum temperature difference is about 3.112 MPa, which is less than the axial compressive strength of 3.5 MPa.

[0147] (2) The void ratio of the elastomer 1 of the embedded part is taken as 5.6 (%). At this time, the temperature stress of the base course at the maximum temperature difference is about 3.260 MPa, which is less than the axial compressive strength of 3.5 MPa.

[0148] (3) The void ratio of the elastomer 1 of the embedded part is taken as 3.9 (%). At this time, the temperature stress of the base course at the maximum temperature difference is about 3.087 MPa, which is less than the axial compressive strength of 3.5 MPa.

[0149] At this time, the arching displacement conditions (theoretical maximum values) are respectively: about 1.386 cm, 0.979 cm and 0.979 cm, slightly higher or less than the flatness requirements for the stable base course in the specifications (the flatness for expressways and first-class highways, and other grade highways is 0.8 cm and 1.2 cm).

[0150] ②The spacing of the embedded parts is taken as 200 meters:

[0151] (1) The void ratio of the elastomer 1 of the embedded part is taken as 12.03%, and at this time, the temperature stress of the base layer at the maximum temperature difference is about 3.408 MPa, which is less than the axial compressive strength of 3.5 MPa.

[0152] (2) The void ratio of the elastomer 1 of the embedded part is taken as 5.6 (%), and at this time, the temperature stress of the base layer at the maximum temperature difference is about 3.138 MPa, which is less than the axial compressive strength of 3.5 MPa.

[0153] (3) The void ratio of the elastomer 1 of the embedded part is taken as 3.9 (%), and at this time, the temperature stress of the base layer at the maximum temperature difference is about 3.253 MPa, which is less than the axial compressive strength of 3.5 MPa.

[0154] At this time, the arch expansion displacement conditions (theoretical maximum values) are respectively: about 0.980 cm, 0.980 cm, and 0.980 cm, slightly higher or less than the flatness requirements for the stable base layer in the specifications (the flatness of expressways and first-class highways, and other grade highways is 0.8 and 1.2 cm).

[0155] ③The spacing of the embedded parts is taken as 150 meters:

[0156] (1) The void ratio of the elastomer 1 of the embedded part is taken as 12.03%, and at this time, the temperature stress of the base layer at the maximum temperature difference is about 3.296 MPa, which is less than the axial compressive strength of 3.5 MPa.

[0157] (2) The void ratio of the elastomer 1 of the embedded part is taken as 5.6 (%), and at this time, the temperature stress of the base layer at the maximum temperature difference is about 3.293 MPa, which is less than the axial compressive strength of 3.5 MPa.

[0158] (3) The void ratio of the elastomer 1 of the embedded part is taken as 3.9 (%), and at this time, the temperature stress of the base layer at the maximum temperature difference is about 3.151 MPa, which is less than the axial compressive strength of 3.5 MPa.

[0159] At this time, the arch expansion displacement conditions (theoretical maximum values) are respectively: about 0.977 cm, 0.977 cm, and 0.977 cm, slightly higher or less than the flatness requirements for the stable base layer in the specifications (the flatness of expressways and first-class highways, and other grade highways is 0.8 and 1.2 cm).

[0160] Considering the convenience of production and the economy and convenience of application of the embedded part products, the porosity ratio of the elastomer 1 of the embedded part can be selected from two types: 5.6% or 12.03%. For the existing highways at all levels, when preventing and treating the swelling diseases of the water-stable base course, the spacing of the embedded parts should be determined according to the gradation type and axial compressive strength of the water-stable base course mixture of the original highway. Taking the first section of Akeqi on Line 219 as an example, the gradation type of its water-stable base course mixture is CC2-A or CC2-B. Generally, the spacing is recommended to be 200 m or 150 m. Taking the Hotan section of the Mohe Expressway on G3012 as an example, the gradation type of its water-stable base course mixture is C-B-3. Generally, the spacing is recommended to be 250 m or 200 m.

[0161] Specifically, the working process or working principle of the embedded part for preventing and treating the swelling of the water-stable base course is as follows: When in use, for the newly built highways at all levels, when preventing and treating the swelling diseases of the water-stable base course, the gradation of the water-stable base course mixture of the highway should be designed first. According to the annual maximum temperature difference value of the project area, the expansion coefficient and axial compressive strength of different mixture gradations are determined. The gradation type with a small expansion coefficient is selected as the mixture type of the newly built highway cement stabilized base course. According to the determined mixture type and axial compressive strength, the spacing of the embedded parts is determined. Taking the second section of Akeqi on Line 219 as an example, the gradation type of its water-stable base course mixture is CC2-A or CC2-B. If the embedding method is used to prevent the swelling diseases of this section of the road, generally, the spacing is recommended to be 200 m or 150 m.

Claims

1. An embedded part for preventing and controlling the expansion of a water-stable base layer, comprising an elastic body (1) and two L-shaped tooth brackets (2), characterized in that: The top of the elastic body (1) is flush with the top of the L-shaped latch tooth bracket (2); the shape of the L-shaped latch tooth bracket (2) is set to be L-shaped; a plurality of latch seats (3) are provided on the surface of the L-shaped latch tooth bracket (2); the shape of the elastic body (1) is set to be rectangular; and the shape after the two L-shaped latch tooth brackets (2) and the elastic body (1) are assembled is convex.

2. The embedded part for preventing and controlling the expansion of a water-stable base according to claim 1 is characterized in that: The width of the L-shaped latch bracket (2) and the elastic body (1) after being assembled is 104 cm, the length of the L-shaped latch bracket (2) and the elastic body (1) are both 12 m, and the height of the L-shaped latch bracket (2) and the elastic body (1) are both 32 cm.

3. The embedded part for preventing and controlling the expansion of a water-stable base according to claim 1 is characterized in that: The width of the elastic body (1) is 40-16 cm, and the width of the elastic body (1) and the two L-shaped tooth brackets (2) after being assembled is 60 cm.

4. The embedded part for preventing and controlling the expansion of a water-stable base according to claim 1 is characterized in that: The length and width of the card seat (3) are both 8 cm, the height of the card seat (3) is 4 cm, and the distance between adjacent card seats (3) is 20 cm.

5. The embedded part for preventing and controlling the expansion of a water-stable base according to claim 1, characterized in that: The distance between the front side of the frontmost clamping seat (3) and the front side of the L-shaped clamping tooth bracket (2) is 26 cm, and the distance between the side of the clamping seat (3) close to the elastic body (1) and the inner wall of the L-shaped clamping tooth bracket (2) is 7 cm.

6. The embedded part for preventing and controlling the expansion of a water-stable base according to claim 1, characterized in that: The L-shaped latch bracket (2) is made of PA46 material, and the elastic body (1) is made of rubber with gaps.

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