CN211848646U - Deep cutting structure for expansive rock soil of high-speed railway - Google Patents
Deep cutting structure for expansive rock soil of high-speed railway Download PDFInfo
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- CN211848646U CN211848646U CN202020114424.1U CN202020114424U CN211848646U CN 211848646 U CN211848646 U CN 211848646U CN 202020114424 U CN202020114424 U CN 202020114424U CN 211848646 U CN211848646 U CN 211848646U
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Abstract
The utility model discloses a high-speed railway expansive rock-soil deep cutting structure, which comprises a plurality of reinforcing supporting piles, wherein the reinforcing supporting piles are symmetrically arranged at the slope toe of the deep cutting in two rows, and each row of the reinforcing supporting piles are arranged at intervals; the supporting cross beam is arranged on the foundation between the two symmetrically arranged reinforcing and supporting piles; the buffer layer is arranged on the foundation at the bottom of the supporting beam; the waterproof layer is arranged on the foundation between two adjacent supporting cross beams; and the bearing plate is connected to the top of the supporting beam and the reinforcing supporting pile and is used for arranging a track structure. The technical problem that the expansive rock soil causes the upwarp deformation of the high-speed railway is effectively solved, and the method has the characteristics of being controllable in stability and upwarp deformation of the expansive rock soil, convenient to construct, economic, environment-friendly, beneficial to popularization and application and the like.
Description
Technical Field
The utility model relates to a geotechnical engineering field especially relates to a deep cutting structure of high-speed railway inflation ground and construction method.
Background
Expansive rock soil is widely distributed in China, has the characteristics of water absorption expansion, water loss shrinkage, repeated expansion and contraction deformation, rapid attenuation of water immersion strength and the like, and is called cancer in the geotechnical engineering. When a high-speed railway, particularly a ballastless track high-speed railway, passes through an expansive rock-soil foundation in a deep cutting mode, the stability and millimeter-scale deformation control of the high-speed railway are difficult, and particularly, the upward deformation repair of the ballastless track caused by the expansive rock-soil is extremely difficult, low in efficiency and high in cost. With the continuous promotion of the construction of the high-speed railway to the mountainous area, the occurrence of the expansive rock-soil deep cutting engineering can not be completely avoided. Therefore, the provided effective high-speed railway expansive rock-soil deep cutting structure and the construction method have urgency and necessity. The vertical excavation height of the soil slope exceeds 20 meters, the vertical excavation height of the rock slope exceeds 30 meters, or a cutting which needs special design for excavating the slope is called a deep cutting.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: aiming at the problems in the prior art, the high-speed railway expansive rock-soil deep cutting structure and the construction method thereof are provided, and the technical problems of high-speed railway expansive rock-soil deep cutting stability control and upwarp deformation control can be effectively solved.
In order to realize the purpose, the utility model discloses a technical scheme be:
a deep cutting structure of high-speed railway inflation rock soil includes:
the reinforcing support piles are symmetrically arranged at the deep cutting slope toe in two rows, and each row of the reinforcing support piles are arranged at intervals;
the supporting cross beam is arranged on the foundation between the two symmetrically arranged reinforcing and supporting piles;
the buffer layer is arranged on the foundation at the bottom of the supporting beam;
the waterproof layer is arranged on the foundation between two adjacent supporting cross beams;
and the bearing plate is connected to the top of the supporting beam and the reinforcing supporting pile and is used for arranging a track structure.
By adopting the high-speed railway expansive rock-soil deep cutting structure, the reinforcing support pile is arranged at the slope toe of the expansive rock-soil cutting, so that the reinforcing support pile is used for bearing the soil pressure generated by expansive rock-soil and providing upward supporting force for the support beam, and can also be used as an uplift pile of an expansive rock-soil foundation for providing downward uplift force for the support beam; the arranged buffer layer can greatly reduce the expansion force of the expansive rock-soil foundation on the supporting beam; the supporting cross beams can improve the stress state of the reinforced supporting pile, provide favorable supporting counter force for the reinforced supporting pile to resist soil pressure, and serve as a stress foundation of the bearing plate; the waterproof layer can prevent the water seepage under the upper structure from influencing the strength of the expansive rock-soil foundation; the bearing plate is as track structure's support basis, the bearing plate lower part has great unsettled space, and the power of encircleing on the inflation ground can not transmit to the bearing plate to effectively solved the inflation ground and caused the high-speed railway to produce the technical problem that the arch warp, have inflation ground stability and the arch warp controllable, construction convenience, economy, environmental protection and do benefit to characteristics such as popularization and application.
Preferably, water holes are arranged at the bottom of the supporting beam at intervals.
By adopting the structure, the water holes are arranged at the bottom of the supporting beam, the water seepage and the underground water of the upper structure can be longitudinally discharged along the line, and the smooth discharge of the underground accumulated water is facilitated.
Preferably, the cross section of the water through hole is semicircular, rectangular, triangular or trapezoidal.
Preferably, the width of the water passing hole is 0.1m-0.2 m.
Preferably, the distance between two adjacent reinforcing support piles in each row of the reinforcing support piles is 5m-7 m.
Preferably, the buffer layer is an elastic material member.
Preferably, the cushion layer is a rubber member.
Preferably, the waterproof layer is a waterproof coiled material welding and laying structure.
Preferably, the top of the waterproof layer has a drainage slope greater than or equal to 0.1% in the longitudinal direction of the line.
Preferably, the thickness of the middle part of the bearing plate is larger than the thickness of the two ends, and the bottom of the bearing plate is flush.
By adopting the structure, the concave thin parts at the two ends of the bearing plate can be used as a supporting foundation of structures such as a drainage channel, a cable trough and the like.
Preferably, a waterproof structure is arranged at the joint of the bearing plate and the reinforcing support pile.
The utility model also provides a construction method of the deep cutting structure of high-speed railway inflation ground as any one of above, including following step:
A. excavating expansive rock-soil side slopes layer by layer from top to bottom, and reinforcing and protecting the excavated side slopes until the top elevation of the reinforced support pile is excavated;
B. constructing a pile well for reinforcing the supporting pile, and embedding the supporting beam steel bars and the bearing plate steel bars outwards through the pile well at the positions where the supporting beam and the bearing plate are arranged;
C. arranging the reinforcing support pile steel reinforcement cage, and fixedly connecting the reinforcing support pile steel reinforcement cage with the support beam steel reinforcement and the bearing plate steel reinforcement respectively;
D. pouring the reinforced support piles for forming, excavating expansive rock-soil foundation pits between the reinforced support piles, and reinforcing soil between the reinforced support piles until the bottom elevation of the waterproof layer is set;
E. excavating the foundation pit of the buffer layer, and constructing and setting the buffer layer;
F. constructing and arranging the waterproof layer, wherein the top elevation of the waterproof layer is consistent with that of the buffer layer;
G. constructing the reinforced concrete of the supporting beam, wherein the steel bars in the middle of the supporting beam are fixedly connected with the steel bars pre-embedded at two ends, and the vertical steel bars at the top of the supporting beam are exposed;
H. and after the supporting beam is formed, constructing the bearing plate reinforced concrete, fixedly connecting the bearing plate reinforcing steel bars with exposed reinforcing steel bars at the top of the supporting beam and reinforcing steel bars pre-embedded at the reinforcing supporting piles respectively, and forming a cavity between the bottom of the bearing plate and the top of the waterproof layer.
Adopt a method of constructing high-speed railway inflation ground dark cutting structure, guaranteed the smooth shaping of high-speed railway inflation ground dark cutting structure, through consolidate the stake and restrain the deformation of inflation ground, through the buffer layer reduces inflation ground right the bulging force that supporting beam produced, through supporting beam can improve consolidate the stress state of stake, conduct simultaneously the atress basis of loading board, through the waterproof layer can avoid superstructure underwater seepage to influence the intensity of inflation ground, through the loading board lower part has great unsettled space, and inflation ground arch force can not transmit to the loading board for restrain the ability that inflation ground caused high-speed railway to produce the work of warping of encircleing effectively realize, have inflation ground stability and upwarp controllable, construction convenience, Economic, environment-friendly and beneficial to popularization and application.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses a high-speed railway inflation ground deep cutting structure, through set up at inflation ground cutting toe consolidate the stay pile for bear the soil pressure that inflation ground produced, and for the supporting beam provides ascending holding power, still can provide decurrent anti-floating power for the supporting beam as the anti-floating pile of inflation ground foundation; the arranged buffer layer can greatly reduce the expansion force of the expansive rock-soil foundation on the supporting beam; the supporting cross beams can improve the stress state of the reinforced supporting pile, provide favorable supporting counter force for the reinforced supporting pile to resist soil pressure, and serve as a stress foundation of the bearing plate; the waterproof layer can prevent the water seepage under the upper structure from influencing the strength of the expansive rock-soil foundation; the bearing plate is used as a supporting foundation of a track structure, the lower part of the bearing plate is provided with a larger suspension space, and the upward arching force of the expansive rock soil foundation cannot be transmitted to the bearing plate, so that the technical problem that the high-speed railway generates upward arching deformation caused by the expansive rock soil is effectively solved, and the bearing plate has the characteristics of controllable stability and upward arching deformation of the expansive rock soil, convenience in construction, economy, environmental friendliness, contribution to popularization and application and the like;
2. the high-speed railway expansive rock-soil deep cutting structure has the advantages that the water through holes are formed in the bottom of the supporting beam, so that water seepage and underground water of an upper structure can be longitudinally discharged along a line, and underground accumulated water can be smoothly discharged;
3. the utility model discloses a high-speed railway inflation ground dark cutting structure, bearing board middle part thickness is greater than the thickness at both ends, and the bottom of bearing board is parallel and level, the recessed thinner part in bearing board both ends can be as the support basis of structures such as drainage channel and cable duct;
4. a construction method of deep cutting structure of high-speed railway inflation ground, guaranteed smooth shaping of the deep cutting structure of high-speed railway inflation ground, through consolidate the deformation that the stake restraines inflation ground, through the buffer layer reduces inflation ground right the expansive force that supporting beam produced, through supporting beam can improve consolidate the stress state of stake, conduct simultaneously the atress basis of loading board, through the waterproof layer can avoid superstructure underwater seepage to influence the intensity of inflation ground, through the loading board lower part has great unsettled space, and inflation ground upwarp power can not transmit to the loading board for restrain inflation ground and cause high-speed railway to produce the ability of upwarp deformation work and effectively realize, have that inflation ground stability and upwarp controllable, construction convenience, Economic, environment-friendly and beneficial to popularization and application.
Drawings
Fig. 1 is a schematic structural diagram of a high-speed railway expansive rock-soil deep cutting structure of the utility model;
figure 2 is the utility model discloses a structural schematic of deep cutting structure of high-speed railway inflation ground.
Icon: 1-reinforcing support piles, 2-buffer layers, 3-support beams, 4-waterproof layers, 5-bearing plates, 6-track structures and 7-side slope excavation.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
As shown in figures 1-2, the utility model relates to a deep cutting structure of high-speed railway inflation ground, include:
the reinforcing support piles 1 are divided into two rows and symmetrically arranged at the slope toe of the deep cutting, each row of reinforcing support piles 1 are arranged at intervals, and the distance between every two adjacent reinforcing support piles 1 in each row of reinforcing support piles 1 is 5-7 m;
the supporting cross beam 3 is arranged on a foundation between the two symmetrically arranged reinforcing and supporting piles 1, water passing holes are formed in the bottom of the supporting cross beam 3 at intervals, the water passing holes are arranged in an upward concave mode, the cross sections of the water passing holes are semicircular, rectangular, triangular or trapezoidal, and the width of each water passing hole is 0.1-0.2 m;
the buffer layer 2 is arranged on the foundation at the bottom of the supporting beam 3, and the buffer layer 2 has a stressed contraction deformation function; specifically, the cushion layer 2 is an elastic material member, preferably a rubber member;
the waterproof layer 4 is arranged on the foundation between every two adjacent supporting cross beams 3, the waterproof layer 4 is a waterproof coiled material welding and laying structure, and the top of the waterproof layer 4 is provided with a drainage gradient which is larger than or equal to 0.1% along the longitudinal direction of the line;
the bearing plate 5 is connected to the top of the supporting beam 3 and the reinforcing supporting pile 1, the thickness of the middle of the bearing plate 5 is larger than that of the two ends, the bottom of the bearing plate 5 is flush, and a waterproof structure is arranged at the joint of the bearing plate 5 and the reinforcing supporting pile 1;
and the track structure 6 is arranged on the top surface of the bearing plate 5.
By applying the high-speed railway expansive rock-soil deep cutting structure, the reinforcing support pile 1 is arranged at the slope toe of the expansive rock-soil cutting, so that the reinforcing support pile is used for bearing the soil pressure generated by expansive rock-soil and providing upward supporting force for the support beam 3, and can also be used as an uplift pile of an expansive rock-soil foundation for providing downward uplift force for the support beam 3; the arranged buffer layer 2 can greatly reduce the expansive force of the expansive rock soil foundation on the supporting cross beam 3; the supporting cross beams 3 can improve the stress state of the reinforced supporting piles 1, provide favorable supporting counter force for the reinforced supporting piles to resist soil pressure, serve as the stress foundation of the bearing plate 5, are small in contact area with expansive rock soil, and small in upwarp force generated by the expansive rock soil, and the water through holes are formed in the bottoms of the supporting cross beams 3, so that water seepage and underground water of an upper structure can be longitudinally discharged along a line, and smooth discharge of underground accumulated water is facilitated; the waterproof layer 4 can prevent the water seepage under the upper structure from influencing the strength of the expansive rock-soil foundation; the bearing plate 5 is as the support basis of track structure 6, and the recessed thin part in both ends can regard as the support basis of structures such as drainage channel and cable duct, bearing plate 5 lower part has great unsettled space, and the power of encircleing on the inflation ground can not transmit to bearing plate 5 to effectively solved the inflation ground and caused the high-speed railway to produce the technological problem of encircleing the deformation, have inflation ground stability and the characteristics such as controllable, the construction convenience, economy, environmental protection and do benefit to popularization and application of encircleing the deformation.
Example 2
As shown in fig. 1-2, the construction method of the high-speed railway expansive rock-soil deep cutting structure according to embodiment 1 of the present invention includes the following steps:
A. excavating expansive rock-soil side slopes in layers from top to bottom, and reinforcing and protecting the excavated side slopes 7 in layers in time until the top elevation of the reinforced support piles 1 is excavated;
B. constructing a pile well of the reinforced support pile 1 at intervals, and embedding reinforcing steel bars of the support beam 3 and reinforcing steel bars of the bearing plate 5 with different lengths outwards through the pile well at the positions where the support beam 3 and the bearing plate 5 are arranged, wherein the length of the pile well is 1m-3 m;
C. arranging a reinforcement cage of the reinforcing support pile 1, and fixedly connecting the reinforcement cage of the reinforcing support pile 1 with the reinforcing steel bars of the support beam 3 and the bearing plate 5 respectively;
D. pouring the reinforced support piles 1 for forming, excavating expansive rock-soil foundation pits between the reinforced support piles 1 after the concrete reaches 90% of the design strength, and reinforcing the inter-pile soil between the reinforced support piles 1 until the bottom elevation of the waterproof layer 4 is set;
E. excavating a foundation pit of the buffer layer 2, and constructing and setting the buffer layer 2;
F. constructing and arranging the waterproof layer 4, wherein the top elevation of the waterproof layer 4 is consistent with the top elevation of the buffer layer 2;
G. constructing the reinforced concrete of the supporting beam 3, wherein the reinforcing steel bars in the middle of the supporting beam 3 are fixedly connected with the reinforcing steel bars pre-embedded at two ends, the water through holes are reserved at the bottom of the supporting beam 3 at intervals, and the vertical reinforcing steel bars at the top of the supporting beam 3 are exposed by 20-30 cm;
H. the supporting beam 3 is molded, after the concrete reaches 90% of the designed strength, the bearing plate 5 is constructed to be reinforced, the reinforcing steel bars of the bearing plate 5 are respectively and fixedly connected with exposed reinforcing steel bars at the top of the supporting beam 3 and reinforcing steel bars pre-embedded at the reinforcing supporting piles 1, and a cavity with the height equal to the height L of the supporting beam 3 is formed between the bottom of the bearing plate 5 and the top of the waterproof layer 4;
I. constructing a track structure 6 on the bearing plate 5.
Application a method of building of deep cutting structure of high-speed railway inflation ground, guaranteed smooth shaping of the deep cutting structure of high-speed railway inflation ground, through consolidate the deformation that stake 1 restraines inflation ground, through buffer layer 2 reduces inflation ground right supporting beam 3 produces the expansive force, through supporting beam 3 can improve consolidate the stress state of stake 1, simultaneously as the atress basis of loading board 5, through waterproof layer 4 can avoid superstructure underwater seepage to influence the intensity of inflation ground, through loading board 5 lower part has great unsettled space, inflation ground arch force can not transmit to loading board 5 for restrain inflation ground and cause high-speed railway to produce the ability of upwarp work effectively realize, have inflation ground stability and upwarp controllable ground, Convenient construction, economy, environmental protection, easy popularization and application, etc.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a deep cutting structure of high-speed railway inflation ground, its characterized in that includes:
the reinforcing support piles (1) are divided into two rows and symmetrically arranged at the slope toe of the deep cutting, and the reinforcing support piles (1) in each row are arranged at intervals;
the supporting cross beam (3) is arranged on the foundation between the two symmetrically arranged reinforcing and supporting piles (1);
the buffer layer (2) is arranged on the foundation at the bottom of the supporting beam (3);
the waterproof layer (4) is arranged on the foundation between every two adjacent supporting cross beams (3);
the bearing plate (5) is connected to the top of the supporting beam (3) and connected to the reinforced supporting pile (1), and the bearing plate (5) is used for arranging a track structure (6).
2. The high-speed railway expansive rock-soil deep cutting structure according to claim 1, wherein the bottom of the supporting beam (3) is provided with water through holes at intervals.
3. The high-speed railway expansive rock-soil deep cutting structure according to claim 2, wherein the cross section of the water through holes is semicircular, rectangular, triangular or trapezoidal.
4. The high-speed railway expansive rock-soil deep cutting structure according to claim 1, wherein the distance between two adjacent reinforcing support piles (1) in each row of the reinforcing support piles (1) is 5-7 m.
5. The high-speed railway expansive rock-soil deep cutting structure according to claim 1, wherein the buffer layer (2) is an elastic material member.
6. The high-speed railway expansive rock-soil deep cutting structure according to claim 5, wherein the buffer layer (2) is a rubber member.
7. The high-speed railway expansive rock-soil deep cutting structure according to claim 1, wherein the waterproof layer (4) is a waterproof coiled material welding laying structure.
8. The high-speed railway expansive rock-soil deep cutting structure according to claim 7, wherein the top of the waterproof layer (4) has a water drainage gradient greater than or equal to 0.1% in the longitudinal direction of the line.
9. The high-speed railway expansive rock-soil deep cutting structure according to any one of claims 1-8, wherein the thickness of the middle part of the bearing plate (5) is larger than that of the two ends, and the bottom is flush.
10. The high-speed railway expansive rock-soil deep cutting structure according to any one of claims 1 to 8, wherein a waterproof structure is arranged at the joint of the bearing plate (5) and the reinforcing support pile (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020114424.1U CN211848646U (en) | 2020-01-17 | 2020-01-17 | Deep cutting structure for expansive rock soil of high-speed railway |
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| CN202020114424.1U CN211848646U (en) | 2020-01-17 | 2020-01-17 | Deep cutting structure for expansive rock soil of high-speed railway |
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| CN202020114424.1U Active CN211848646U (en) | 2020-01-17 | 2020-01-17 | Deep cutting structure for expansive rock soil of high-speed railway |
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