CN111794183A - Shallow-buried underground tunnel top riverbed bottom reinforcing structure and method - Google Patents
Shallow-buried underground tunnel top riverbed bottom reinforcing structure and method Download PDFInfo
- Publication number
- CN111794183A CN111794183A CN202010658551.2A CN202010658551A CN111794183A CN 111794183 A CN111794183 A CN 111794183A CN 202010658551 A CN202010658551 A CN 202010658551A CN 111794183 A CN111794183 A CN 111794183A
- Authority
- CN
- China
- Prior art keywords
- river
- layer
- retaining wall
- groove
- riverbed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000010276 construction Methods 0.000 claims abstract description 21
- 239000004576 sand Substances 0.000 claims description 18
- 239000004575 stone Substances 0.000 claims description 14
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 6
- 239000010802 sludge Substances 0.000 claims description 4
- 238000005056 compaction Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/121—Devices for applying linings on banks or the water bottom
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment
- E02B3/066—Quays
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Revetment (AREA)
Abstract
The invention provides a reinforcing structure and a method for the bottom of a river bed at the top of a shallow-buried underground tunnel, wherein after dredging the river bottom, a replacement and filling layer is laid at the bottom of a river channel to level the river bottom, grooves are formed in the positions, above the replacement and filling layer, of the bottoms of existing retaining walls on two sides of the river channel, towards the inner sides of the existing retaining walls, a gravel layer is laid above the replacement and filling layer, waterproof plates are laid on the existing retaining walls on two sides, the inner walls of the grooves in the upper sides of the gravel layer and the gravel layer in the grooves, a reinforcing mesh is laid on the gravel layer, two ends of the reinforcing mesh extend into the grooves formed in the bottoms of the existing retaining walls on two sides, and concrete is poured at the reinforcing mesh to form a hardened layer of the river bottom. The problem of pass river course construction risk degree of difficulty under to the shallow tunnel of digging of burying at present, the riverbed bottom seeps water and influences tunnel construction, tunnel probably has the collapse etc. is solved. Belongs to the field of building engineering.
Description
Technical Field
The invention relates to a shallow-buried underground tunnel top riverbed bottom reinforcing structure and a method, which are particularly suitable for reinforcing the bottom of a river channel penetrating below a shallow-buried tunnel and belong to the field of constructional engineering.
Background
At present, when a shallow-buried underground tunnel penetrates through a river channel at home, because unfavorable geology exists in the sections, the bottom of the river channel is seriously accumulated with silt all the year around, in addition, domestic sewage and industrial wastewater are continuously washed away, the bottom of the river bed is seriously corroded, in addition, the distance between the underground tunnel and the surface of the river bed is short, and the construction difficulty is high. In the construction process, the risks of water seepage of a riverbed, collapse of a tunnel, surface collapse and the like exist. In order to reduce the risk of tunnel construction, the domestic advanced method comprises the following steps: (1) reinforcing the surrounding rock grade at the bottom of the riverbed by adopting a grouting method; (2) the river channel is changed to avoid interference on construction; (3) the river water is guided by a large-caliber light pipe. The method can only reduce the water leakage risk in the tunnel construction process, and can not well ensure the safety and reliability of the tunnel construction.
Disclosure of Invention
The invention provides a reinforcing structure and a reinforcing method for the top and the bottom of a riverbed at the top of a shallow-buried underground excavation tunnel, which aim to solve the problems that the construction risk of a river channel penetrating through the shallow-buried underground excavation tunnel is high, the tunnel construction is influenced by water seepage at the bottom of the riverbed, the tunnel is likely to collapse and the like at present.
In order to achieve the purpose, the shallow-buried underground tunnel top and river bed bottom reinforcing structure is supposed to be adopted, the structure is that after dredging the river bed, a replacement filling layer is laid at the bottom of a river channel to enable the river bed to be flat, grooves are formed in the positions, on the replacement filling layer, of the bottoms of existing retaining walls on two sides of the river channel, towards the inner sides of the existing retaining walls, a gravel layer is laid above the replacement filling layer, waterproof plates are laid on the existing retaining walls on two sides, the inner walls of the grooves on the upper sides of the gravel layer and the gravel layer in the grooves, a reinforcing steel bar net is further laid on the gravel layer, two ends of the reinforcing steel bar net extend into the grooves formed in the bottoms of the existing retaining walls on two sides, and concrete is poured at the reinforcing steel bar net to form a river.
In the riverbed bottom reinforcing structure, the waterproof plate laid on the gravel layer extends 0.5m towards the inner side of the riverway;
in the river bed bottom reinforcing structure, a water retaining wall is built in the middle of the river channel along the water flow direction so as to facilitate the subsequent river bottom hardening construction;
in the river bed bottom reinforcing structure, the particle size of the broken stone used in the broken stone layer is 2-3cm, and the thickness after paving and compacting is 8-15 cm;
in the riverbed bottom reinforcing structure, the groove is a rectangular groove with the depth of 15-30cm and the height of 25-40cm, the lower part of the groove is flush with the upper end of the filling layer, and the upper part of the groove is flush with the upper end surface of the river bottom hardening layer;
the construction method comprises the following steps:
1) single-side closed water retaining wall arrangement
Along the river flow direction, sand bags are arranged at the positions 10m upstream and downstream of the center line of the river and the top of the tunnel to form a closed loop by enclosing three sand bag surfaces and an existing retaining wall on one side;
pumping out river water in the enclosed area by using a water pump;
digging a groove along the inner side of the sand bag face, building a water retaining wall along the groove, pouring concrete for molding, and removing the sand bag after building the water retaining wall closed with the existing retaining wall, wherein the water retaining wall is higher than the river depth;
2) dredging and hardening of the bottom of a unilateral riverbed
The small excavator is transported to the inner side of the water retaining wall, sludge at the bottom of the river channel is removed, and then the bottom of the river channel is paved to form a replacement filling layer;
excavating a rectangular groove on the bottom of the existing retaining wall in a manner of being perpendicular to the existing retaining wall;
broken stones with the particle size of 2-3cm are adopted, a broken stone layer is paved at the bottom of the river channel on the side, and the broken stones are compacted by an excavator crawler, wherein the compaction thickness is 8-15 cm;
paving a reinforcing mesh on the crushed stone layer, wherein the reinforcing mesh extends into the groove;
paving waterproof boards along the inner wall of the groove above the gravel layer and the side wall of the existing retaining wall above the groove, paving the bottom waterproof board on the gravel layer in the groove, and extending the upper end of the waterproof board paved on the side wall of the existing retaining wall to the river surface;
pouring concrete above the gravel layer to form a river bottom hardened layer, wherein the upper surface of the river bottom hardened layer is higher than the upper side of the groove or is level with the upper side of the groove;
3) the other side is provided with a closed water retaining wall
When the single-side hardened river channel can meet the water passing requirement, the upstream and downstream water retaining walls in the vertical direction of the river flow are removed, and the upstream and downstream hardened ends of the river channel on the other side are surrounded into a closed loop by sand bags;
4) dredging and hardening the bottom of the riverbed at the other side
Dredging and hardening the bottom of the riverbed at the other side of the construction according to the step 2);
5) water retaining wall demolition
And (4) completely removing the sand bag in the enclosure on the other side and the water retaining wall in the center to ensure that the water flow surface area is normal.
And 4) when the bottom of the riverbed on the other side of the construction is hardened, leveling the replacement and filling layer, the gravel layer and the hardened layer on the bottom of the riverbed on the two sides.
Compared with the traditional positioning method, the method changes the geological structure of the top of the river channel, so that normal river water flows over the concrete structural surface, and the water retaining walls on the left side and the right side of the river channel are subjected to water seepage prevention treatment, so that the water seepage probability of the top of the tunnel is reduced, and the risks of tunnel collapse, mud burst, water burst and the like are avoided. Its stable in structure, the cost of manufacture is at the bottom, on-the-spot and implementation wall, and the construction safety is high, wears existing river course under the similar shallow undercut tunnel and has better practicality and popularization nature.
Drawings
FIG. 1 is a cross-sectional view of a channel reinforced according to the present invention;
FIG. 2 is a schematic view of the structure of the existing retaining wall bottom flashing;
fig. 3 is a schematic view of the construction of the mesh reinforcement.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings, and it should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.
Examples
Referring to fig. 1 to 3, wherein, reference numeral 8 denotes a tunnel secondary lining, 9 denotes a tunnel primary support, 10 denotes a surrounding rock, the embodiment provides a reinforcing structure for a riverbed bottom at the top of a shallow-buried and undercut tunnel, which is formed by laying a backfill layer 1 at the bottom of a river channel to level the bottom of the river channel after dredging the bottom of the river channel, forming a groove 21 at the upper side of the backfill layer 1 at the bottom of the existing retaining wall 2 at both sides of the river channel toward the inner side of the existing retaining wall 2, the groove 21 being a rectangular groove with a depth of 15-30cm and a height of 25-40cm, aligning the lower part of the groove 21 with the upper end of the backfill layer 1, laying a gravel layer 3 above the backfill layer 1, the gravel particle size of 2-3cm for the gravel layer 3, and the thickness of 8-15cm after laying and compacting, laying waterproof boards 4 on the existing retaining wall 2 at both sides, the inner wall of the groove 21 at the upper side of the gravel layer 3 and the gravel layer 3 in the groove, the waterproof plate 4 laid on the gravel layer 3 extends 0.5m towards the inner side of the river channel, the reinforcing mesh 5 is laid on the gravel layer 3, two ends of the reinforcing mesh 5 extend into the grooves 21 formed in the bottoms of the existing retaining walls 2 on two sides, concrete is poured on the reinforcing mesh 5 to form a river bottom hardened layer 6, and the upper end surface of the river bottom hardened layer 6 is flush with the upper parts of the grooves 21 or is higher than the upper parts of the grooves 21;
the construction method comprises the following steps:
1) single-side closed water retaining wall arrangement
Along the river flow direction, sand bags are arranged at the positions 10m upstream and downstream of the center line of the river and the top of the tunnel to form a closed loop by enclosing three sand bag surfaces and the existing retaining wall 2 at one side;
completely pumping out river water in the enclosed area by adopting a water pump;
excavating a groove with the depth of 0.5m and the width of 0.3m along the inner side of the sand bag surface, constructing a water retaining wall 7 with the height of 1m along the groove, and pouring and forming the water retaining wall 7 by C20 concrete at one time, wherein the length of the water retaining wall 7 poured at one time is 5 m;
after a water retaining wall 7 closed with the existing retaining wall 2 on the single side is built, the sand bag is completely removed, and the influence on the water flow of a downstream river channel due to the flushing of river water is avoided;
2) dredging and hardening of the bottom of a unilateral riverbed
The small excavator is transported to the inner side of the water retaining wall 7, sludge at the bottom of the river channel is completely removed, a transport slag car is adopted to transport the sludge to a specified abandoned land, then the bottom of the river channel is paved to form a replacement and filling layer 1, and the replacement and filling layer 1 can be filled with soil or gravel;
excavating a rectangular groove 21 with the depth of 20cm and the height of 30cm, which is used for laying a waterproof plate 4, at the bottom of the existing retaining wall 2 and is vertical to the existing retaining wall 2;
broken stones with the particle size of 2-3cm are adopted, a broken stone layer 3 with the thickness of 10cm is paved at the bottom of the river channel at the side, and the broken stones are compacted by an excavator crawler;
laying a reinforcing mesh 5 on the crushed stone layer 3;
laying waterproof plates 4 along the inner wall of the groove 21 above the gravel layer 3 and the side wall of the existing retaining wall 2 above the groove 21, laying the waterproof plate 4 at the bottom on the gravel layer 3 and extending out of the groove for 0.5m, and enabling the upper end of the waterproof plate 4 laid at the side wall of the existing retaining wall 2 to be flush with the upper end of the retaining wall 7;
c20 concrete is adopted to pour the reinforcing mesh 5 to form a river bottom hardened layer 6, the thickness is 20cm, and pouring is carried out once every 5 m;
3) the other side is provided with a closed water retaining wall
When the single-side hardened river channel can meet the water passing requirement, the upstream and downstream water retaining walls 7 in the vertical direction of the river flow are removed, and the upstream and downstream hardened ends of the river channel on the other side are surrounded into a closed loop by sand bags to form the water retaining wall 7 in the center and the existing retaining wall 2 on the other side;
4) dredging and hardening the bottom of the riverbed at the other side
Dredging and hardening the bottom of the riverbed at the other side of the construction according to the step 2), and enabling the replacement and filling layer 1, the gravel layer 3 and the river bottom hardened layer 6 at the two sides to be flush with each other;
5) water retaining wall demolition
And (3) completely removing the sand bag in the enclosure on the other side and the water retaining wall 7 in the center to ensure that the water flow surface area is normal.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides a shallow secret tunnel top riverbed bottom reinforced structure that digs which buries which characterized in that: the structure is that after dredging the river bottom, a replacement and filling layer (1) is laid at the bottom of the river channel so as to enable the river bottom to be flat, grooves (21) are formed in the upper side of the replacement and filling layer (1) at the bottoms of the existing retaining walls (2) on the two sides of the river channel, gravel layers (3) are laid above the replacement and filling layer (1), waterproof boards (4) are laid on the existing retaining walls (2) on the two sides in a fit mode, the inner walls of the grooves (21) on the upper sides of the gravel layers (3) and the gravel layers (3) in the grooves (21), reinforcing mesh (5) are laid on the gravel layers (3), the two ends of the reinforcing mesh (5) extend into the grooves (21) formed in the bottoms of the existing retaining walls (2) on the two sides, and concrete is poured at the positions of the reinforcing mesh (5) to form a river bottom hardened layer (6).
2. The shallow-buried underground tunnel top and bottom riverbed reinforcing structure as claimed in claim 1, wherein: the waterproof plate (4) laid on the gravel layer (3) extends 0.5m towards the inner side of the river channel.
3. The shallow-buried underground tunnel top and bottom riverbed reinforcing structure as claimed in claim 1, wherein: the particle size of the broken stone used in the broken stone layer (3) is 2-3cm, and the thickness after paving and compacting is 8-15 cm.
4. The shallow-buried underground tunnel top and bottom riverbed reinforcing structure as claimed in claim 1, wherein: the groove (21) is a rectangular groove with the depth of 15-30cm and the height of 25-40cm, the lower part of the groove (21) is flush with the upper end of the filling layer (1), and the upper part of the groove (21) is flush with the upper end face of the river bottom hardened layer (6).
5. A method for reinforcing the bottom of a riverbed at the top of a shallow-buried and underground-excavated tunnel is characterized by comprising the following specific construction steps of:
1) single-side closed water retaining wall arrangement
Along the river flow direction, sand bags are arranged at the positions 10m upstream and downstream of the center line of the river and the top of the tunnel to form a closed loop by enclosing three sand bag surfaces and the existing retaining wall 2 at one side;
pumping out river water in the enclosed area by using a water pump;
digging a groove along the inner side of the sand bag face, building a water retaining wall (7) along the groove, pouring concrete for molding, and removing the sand bag after building the water retaining wall (7) closed with the existing retaining wall (2), wherein the water retaining wall (7) is higher than the river depth;
2) dredging and hardening of the bottom of a unilateral riverbed
The small excavator is transported to the inner side of the water retaining wall (7), sludge at the bottom of the river channel is removed, and then the bottom of the river channel is paved to form a replacement filling layer (1);
excavating a rectangular groove (21) on the bottom of the existing retaining wall (2) in a manner of being vertical to the existing retaining wall (2);
broken stones with the particle size of 2-3cm are adopted, a broken stone layer (3) is laid at the bottom of the river channel on the side, and compaction is carried out by an excavator crawler, wherein the compaction thickness is 8-15 cm;
paving a reinforcing mesh (5) on the gravel layer (3), wherein the reinforcing mesh (5) extends into the groove (21);
paving waterproof boards (4) along the inner wall of the groove (21) above the gravel layer (3) and the side wall of the existing retaining wall (2) above the groove (21), paving the waterproof board (4) at the bottom on the gravel layer (3) in the groove (21), and extending the upper end of the waterproof board (4) paved on the side wall of the existing retaining wall (2) to the river surface;
pouring concrete above the gravel layer (3) to form a river bottom hardened layer (6), wherein the upper surface of the river bottom hardened layer (6) is higher than the upper side of the groove (21) or is level with the upper side of the groove (21);
3) the other side is provided with a closed water retaining wall
When the single-side hardened river channel can meet the water passing requirement, the upstream and downstream water retaining walls (7) in the vertical direction of river flow are removed, and sand bags are adopted to enclose the water retaining walls (7) in the center and the existing retaining walls (2) on the other side into a closed loop at the upstream and downstream hardened ends of the river channel on the other side;
4) dredging and hardening the bottom of the riverbed at the other side
Dredging and hardening the bottom of the riverbed at the other side of the construction according to the step 2);
5) water retaining wall demolition
And (3) completely removing the sand bag in the enclosure on the other side and the water retaining wall (7) in the center to ensure that the water flow surface area is normal.
6. The method for reinforcing the bottom of the riverbed at the top of the shallow-buried underground tunnel according to claim 5, wherein the method comprises the following steps: and 4) when the bottom of the riverbed on the other side of the construction is hardened, enabling the replacement and filling layer (1), the gravel layer (3) and the hardened layer (6) on the bottom of the riverbed on the two sides to be flush with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010658551.2A CN111794183B (en) | 2020-07-09 | 2020-07-09 | Method for reinforcing bottom of top river bed of shallow-buried underground excavation tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010658551.2A CN111794183B (en) | 2020-07-09 | 2020-07-09 | Method for reinforcing bottom of top river bed of shallow-buried underground excavation tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111794183A true CN111794183A (en) | 2020-10-20 |
| CN111794183B CN111794183B (en) | 2024-10-18 |
Family
ID=72810639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010658551.2A Active CN111794183B (en) | 2020-07-09 | 2020-07-09 | Method for reinforcing bottom of top river bed of shallow-buried underground excavation tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111794183B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427214A (en) * | 2022-03-07 | 2022-05-03 | 中冶长天国际工程有限责任公司 | Dam foundation reservoir bottom seepage-proofing paving structure and building method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343035A (en) * | 2018-02-11 | 2018-07-31 | 中铁十二局集团有限公司 | River construction method is worn under shallow tunnel |
| CN210151703U (en) * | 2019-05-13 | 2020-03-17 | 中国建筑第六工程局有限公司 | River bottom reinforcing structure capable of enabling shield to safely penetrate through ultra-shallow buried river |
| CN111156008A (en) * | 2019-12-30 | 2020-05-15 | 中铁二十二局集团轨道工程有限公司 | Shield construction and monitoring method for dangerous source river electric power tunnel |
| CN212477607U (en) * | 2020-07-09 | 2021-02-05 | 中铁二局第一工程有限公司 | Shallow underground excavation tunnel top riverbed bottom reinforced structure that buries |
-
2020
- 2020-07-09 CN CN202010658551.2A patent/CN111794183B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343035A (en) * | 2018-02-11 | 2018-07-31 | 中铁十二局集团有限公司 | River construction method is worn under shallow tunnel |
| CN210151703U (en) * | 2019-05-13 | 2020-03-17 | 中国建筑第六工程局有限公司 | River bottom reinforcing structure capable of enabling shield to safely penetrate through ultra-shallow buried river |
| CN111156008A (en) * | 2019-12-30 | 2020-05-15 | 中铁二十二局集团轨道工程有限公司 | Shield construction and monitoring method for dangerous source river electric power tunnel |
| CN212477607U (en) * | 2020-07-09 | 2021-02-05 | 中铁二局第一工程有限公司 | Shallow underground excavation tunnel top riverbed bottom reinforced structure that buries |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427214A (en) * | 2022-03-07 | 2022-05-03 | 中冶长天国际工程有限责任公司 | Dam foundation reservoir bottom seepage-proofing paving structure and building method thereof |
| CN114427214B (en) * | 2022-03-07 | 2023-12-29 | 中冶长天国际工程有限责任公司 | Dam foundation reservoir bottom seepage-proofing paving structure and construction method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111794183B (en) | 2024-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212477607U (en) | Shallow underground excavation tunnel top riverbed bottom reinforced structure that buries | |
| CN104727302B (en) | Board wall cast-in-place construction technique between a kind of friction pile stake | |
| CN103321246B (en) | Underground diaphragm wall based foundation pit construction method | |
| CN104452829A (en) | Piled raft foundation anti-floating structure and construction method | |
| CN105464074A (en) | Manual hole digging pile high polymer grouting protection structure and construction method thereof | |
| CN115653000A (en) | Gravity pipe gallery in-situ protection structure system in foundation pit range and construction method | |
| CN210826964U (en) | Dyke top highway embankment piece together wide structure | |
| CN102493485B (en) | Method for building slope protection retaining wall during filling | |
| CN107190709B (en) | Method for building river channel in newly dredged soil reclamation land-enclosed area | |
| CN103276717B (en) | The method of composite earthwork synthetic materials reinforcement cushion soft soil foundation | |
| CN111794183B (en) | Method for reinforcing bottom of top river bed of shallow-buried underground excavation tunnel | |
| CN210163910U (en) | Pipeline pipe jacking receiving well foundation pit supporting structure | |
| CN104846837B (en) | The construction method of ultra-deep well in a kind of bright draining foundation ditch | |
| CN204326119U (en) | A kind of pile-raft foundation float Structure | |
| CN104499489A (en) | Foundation pit construction method | |
| CN104480945A (en) | Inversed construction method for foundation pit | |
| CN114164726B (en) | Local deep excavation backfill structural roadbed and rapid construction method | |
| CN113266362B (en) | Top pipe cover excavation construction method for penetrating through existing dense anchor cable area | |
| CN112144425B (en) | Box culvert drainage ditch pouring method located at high water level and in sandy soil environment | |
| CN204435321U (en) | A kind of steam power station water intaking open channel | |
| CN211523176U (en) | River valley type debris flow ditch waste slag and land making structure | |
| CN209816896U (en) | Collapsible loess area utility tunnel foundation structure | |
| CN112176945A (en) | Construction method for moving back dike to sea | |
| CN108611941A (en) | Method for processing saturated high-fill roadbed | |
| CN217922839U (en) | High-speed railway buried high embankment structure in deep and thick miscellaneous fill-up area |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |