CN213836708U - High water level sand bed rigid and flexible combined pile full-section water stop structure - Google Patents
High water level sand bed rigid and flexible combined pile full-section water stop structure Download PDFInfo
- Publication number
- CN213836708U CN213836708U CN202021894441.8U CN202021894441U CN213836708U CN 213836708 U CN213836708 U CN 213836708U CN 202021894441 U CN202021894441 U CN 202021894441U CN 213836708 U CN213836708 U CN 213836708U
- Authority
- CN
- China
- Prior art keywords
- pile
- shaped steel
- piles
- curtain
- waterproof curtain
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The utility model relates to a high water level sand bed rigid-flexible combined pile full-section water stop structure, which comprises a water stop curtain pile, a back cover curtain pile, H-shaped steel and connecting angle steel; the waterproof curtain piles are enclosed to form a foundation pit, the adjacent waterproof curtain piles are mutually overlapped, H-shaped steel is arranged in the waterproof curtain piles on the same straight line at intervals, the top ends of the H-shaped steel are exposed out of the top surfaces of the waterproof curtain piles, and connecting angle steel is fixed on two sides of the H-shaped steel on the same straight line; the bottom-sealed curtain piles are arranged at the bottom of the foundation pit, the adjacent bottom-sealed curtain piles are mutually lapped, and the outermost circle of bottom-sealed curtain piles is lapped with the adjacent waterproof curtain piles. The utility model ensures that the bottom of the foundation pit does not have water seepage, effectively blocks the lateral and vertical supply of the underground water, and ensures the drying operation of the foundation pit; the utility model discloses still utilize H shaped steel to improve stagnant water curtain stake lateral strength, guaranteed the excavation supporting safety, the angle steel of setting makes the reinforcing of H shaped steel wholeness.
Description
Technical Field
The utility model relates to a foundation ditch support, stagnant water construction technical field particularly, relate to a high water level sand bed rigid and flexible composite pile full section stagnant water structure, be applicable to burial depth, shape rule, the less foundation ditch quick support of size, stagnant water construction under some sand stratum geological conditions such as high water level, high permeability, thick permeable bed.
Background
With the development of the domestic foundation pit supporting technology and the introduction of new foreign technologies, the construction technology of the vertical enclosure structure and the waterproof curtain of the foundation pit is more mature. However, under the geological conditions of sand beds such as high water level, high permeability and thick permeable beds, the lateral and vertical supply of underground water causes great difficulty in controlling underground water of the foundation pit, and the supporting strength of the foundation pit is often insufficient. At present, under the condition of similar stratum, the common methods are underground continuous walls, occlusive piles and the like. The two processes are mature in technology and have good supporting and water stopping effects, but the problems of long construction period, high manufacturing cost, more matched equipment and high requirement on a working surface exist, and the problems are uneconomical for supporting and stopping the foundation pit with shallow burying depth, regular shape and small size.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the uneconomical difficult problem of small-size excavation supporting, stagnant water well to traditional sand bed geology bury depth, shape rule, the less excavation supporting of size, the uneconomical difficult problem of stagnant water of the just gentle combination pile of high water level sand bed has been proposed.
In order to realize the technical purpose, the utility model discloses a following technical scheme:
the utility model relates to a high water level sand bed rigid-flexible combined pile full-section water stop structure, which comprises a water stop curtain pile, a back cover curtain pile, H-shaped steel and connecting angle steel; the waterproof curtain piles are enclosed to form a foundation pit, the adjacent waterproof curtain piles are mutually overlapped, H-shaped steel is arranged in the waterproof curtain piles on the same straight line at intervals, the top ends of the H-shaped steel are exposed out of the top surfaces of the waterproof curtain piles, and connecting angle steel is fixed on two sides of the H-shaped steel on the same straight line; the bottom-sealed curtain piles are arranged at the bottom of the foundation pit, the adjacent bottom-sealed curtain piles are mutually lapped, and the outermost circle of bottom-sealed curtain piles is lapped with the adjacent waterproof curtain piles.
Preferably, the connecting angle steels on two sides of the H-shaped steel on the same straight line are connected through the split bolt and locked through the second nuts at two ends of the split bolt.
Preferably, the connecting angle steels on two sides of the H-shaped steel in the two rows of intersected waterproof curtain piles are connected with each other, and the intersected positions of the connecting angle steels are fixed by the L-shaped steel and the nuts.
Preferably, non-lap joints are arranged at four corners of the joint of the waterproof curtain pile and the back cover curtain pile, and the non-lap joints are provided with inter-pile closed grouting.
Preferably, the top end of the H-shaped steel is exposed out of the waterproof curtain pile by 30 cm.
Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:
(1) the utility model discloses a set up stagnant water curtain stake all around at the foundation ditch, set up back cover curtain stake in the foundation ditch bottom, form an airtight space, at back cover curtain stake and the not effective overlap joint department of stagnant water curtain stake, carry out the sealed slip casting stagnant water between the stake, ensure that the foundation ditch bottom does not take place the infiltration phenomenon, the side direction and the vertical supply of effective separation groundwater guarantee the dry operation of foundation ditch.
(2) The utility model discloses an H shaped steel is inserted in the stagnant water curtain stake to directional stake of steel pipe and positioning steel frame, H shaped steel exposes partial both sides fixed connection angle steel to adopt L shaped steel fixed between the angle steel corner, effectively improved H shaped steel bulk stiffness, improved stagnant water curtain stake lateral strength, guaranteed the excavation supporting safety.
Drawings
FIG. 1 is a structural schematic diagram of a full-section waterproof curtain of a rigid-flexible composite pile of a high-water-level sand layer;
FIG. 2 is a schematic view of the top plate with the sleeve welded thereto;
FIG. 3 is a schematic view of a positioning rod with a hanging ring welded thereto;
FIG. 4 is a schematic view of the elevation controller;
FIG. 5 is a schematic drawing of H-section steel insertion;
FIG. 6 is a schematic drawing showing a plan view of H-section steel being punched;
FIG. 7 is a schematic view of connection and fixation of H-shaped steel angle iron;
FIG. 8 is a schematic view of the drill bit taken diametrically;
FIG. 9 is a schematic top view of the drill bit;
FIG. 10 is a schematic view of the drill pipe, steel pipe wall, and drill bit connection to be drilled;
FIG. 11 is a schematic cross-sectional view A-A of the drill rod, steel pipe wall, and drill bit connection to be drilled;
FIG. 12 is a schematic view of the connection of a grouting pipe, a steel pipe wall and a drill bit to be grouted;
FIG. 13 is a schematic cross-sectional view B-B of a grouting pipe, a steel pipe wall, and a drill bit connection to be grouted;
FIG. 14 is a schematic structural view of step two;
FIG. 15 is a schematic block diagram of step five;
FIG. 16 is a schematic view of a sixth construction step;
FIG. 17 is a schematic view of the completion of the construction of step seven;
FIG. 18 is a schematic view showing the back cover curtain piles and the waterproof curtain piles being dislocated;
FIG. 19 is a schematic view of the structure of step nine;
fig. 20 is a schematic view of a step ten structure.
In the figure: 1. the steel pipe pile comprises a sand soil layer, a soft clay layer, a water stop curtain pile, a bottom sealing curtain pile, a steel pipe pile, a top plate, a sleeve, a positioning steel frame, a cross bar, a positioning rod, a lifting ring, a height controller, an elevation controller, a large steel hook, a small steel hook, a steel wire rope 903, a drill bit, a connecting hole, a connecting groove 1001, a steel pipe wall 11, a grout outlet hole 1101, a drill rod 12, a fixing nut 13, a grouting pipe 14, a flexible layer 1401, a connecting angle steel 15, a split bolt 16, a nut II, a steel pipe 18, a nut III 19, a nut III 20, a pile sealing grouting space 21, a water stop ditch 22, a vertical rib, a limiting plate 23 and a nut I, wherein the steel pipe III is arranged on the bottom sealing curtain pile, the steel frame II, the positioning hole 501, the connecting hole 502, the connecting hole 6, the water level line 6, the steel pipe positioning pile 7, the connecting hole 701, the connecting groove 1001, the steel pipe 11, the steel pipe wall 1101, the grout outlet hole 1101, the drilling rod 12, the drilling rod 13, the fixing nut III, the grouting pipe 1401, the flexible layer 1401, the connecting angle steel pipe III, the connecting angle II, the connecting angle steel pipe III, the connecting angle II, the connecting angle III, the connecting hole III, the connecting angle III, the connecting hole, the limiting plate, and the limiting plate III, and the limiting plate 24, and the limiting plate III.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, and the following examples are illustrative of the present invention and are not limited to the following examples.
The utility model relates to a high water level sand bed is just gentle composite pile full section stagnant water structure, as figure 1, treat that the construction foundation ditch includes sand layer 1 and soft clay layer 2, water level line 6 is arranged in soft clay layer 2.
With reference to fig. 1 and 20, the utility model relates to a high water level sand bed rigid and flexible combined pile full section water stop structure, including waterproof curtain pile 3, back cover curtain pile 4, H shaped steel 5 and angle steel 15. The waterproof curtain piles 3 are enclosed to form a foundation pit, the adjacent waterproof curtain piles 3 are mutually overlapped, and H-shaped steel 5 are arranged in the waterproof curtain piles 3 on the same straight line at intervals; in order to control the structural deformation of the H-shaped steel 5, the top end of the H-shaped steel 5 is exposed out of the top surface of the waterproof curtain pile 3 by 30cm, connecting angle steel 15 is fixed on two sides of the H-shaped steel 5 on the same straight line, the connecting angle steel 15 is connected through a split bolt 16 and locked through nuts two 17 at two ends of the split bolt 16, the connecting angle steel 15 on two sides of the H-shaped steel 5 in the two rows of intersected waterproof curtain piles 3 are connected with each other, and the intersected position of the connecting angle steel 15 is fixed through an L-shaped steel 18 and a nut three 19; the bottom-sealed curtain piles 4 are arranged at the bottom of the foundation pit, the adjacent bottom-sealed curtain piles 4 are in lap joint with each other, one circle of bottom-sealed curtain piles 4 on the outermost side are in lap joint with the adjacent waterproof curtain piles 3, non-lap joints exist at four corner positions of the joint of the waterproof curtain piles 3 and the bottom-sealed curtain piles 4, and the non-lap joints are provided with the inter-pile closed grouting 20.
In this embodiment, the waterproof curtain piles 3 and the bottom-sealed curtain piles 4 are all down-the-hole impact high-pressure jet grouting piles, wherein the diameter of the waterproof curtain pile 3 is 700mm, the pile length is 8.4m, the effective lap length between the piles is 200mm, the inserted H-shaped steel 5 is arranged by inserting one at intervals, the length is 8.4m, the H-shaped steel 5 is H400 mm multiplied by 200mm multiplied by 8mm multiplied by 13mm, and the section steel material is Q345. The diameter of a 4-pile bottom-sealed curtain pile is 700mm, the length of the pile is 2.4m, and the effective lap joint length between the piles is 100 mm; the strength requirements of the pile bodies of the waterproof curtain pile 3 and the back cover curtain pile 4 are more than or equal to 0.8MPa, and the permeability coefficient is less than or equal to 1.0 multiplied by 10-6cm/s, 15% cement content and P.O 42.5 cement grade.The grouting pressure is 25-30 MPa, and the lifting speed is 0.3 m/min.
The construction steps of the high-water-level sand bed rigid-flexible combined pile full-section water stop structure comprise:
s1, carrying out paying-off treatment on a foundation pit to be constructed: positioning and paying off of the waterproof curtain piles are carried out on the outer side of the position line of the foundation pit, and inserting and beating positions of the steel pipe directional piles 7 are respectively determined on extension lines of the positioning lines of the waterproof curtain piles.
S2, construction of a steel pipe directional pile 7: the steel pipe directional pile 7 is a phi 820 steel pipe pile, the steel pipe directional pile 7 is driven into a position where the steel pipe directional pile 7 is inserted and driven by a pile driver, a top plate 701 is welded to the top of the steel pipe directional pile 7, and as shown in fig. 2, 5 and 14, two sleeves 702 are arranged on the upper surface of the top plate 701, and vertical ribs 22 are screwed into the sleeves 702.
S3, installing and positioning a steel frame 8: referring to fig. 3-6, a positioning steel frame 8 is arranged on a top plate 701 of a steel pipe directional pile 7, a clear distance between cross rods 801 of the positioning steel frame 8 is 400mm, a clear distance between positioning rods 802 in the same group is 200mm, a clear distance between two adjacent groups of positioning rods 802 is 770mm, and the pipe diameter of a steel pipe wall is 60mm and the length is 6 m. The positioning steel frame 8 is detachably connected with the top plate 701, namely the positioning steel frame 8 is placed between the two sleeves 702, the positioning steel frame 8 is covered with the limiting plate 23, two ends of the limiting plate 23 are inserted into the vertical ribs 22, and the limiting plate 23 and the positioning steel frame 8 are temporarily fixed through the first nuts 24; positioning steel frame 8 include two parallel arrangement's horizontal pole 801 and a plurality of groups interval arrangement locating lever 802 between the horizontal pole, the lower surface of every group locating lever 802 all is equipped with rings 803, all installs a plurality of elevation controllers 9 on rings 803, elevation controller 9 includes that big steel colludes 901, little steel colludes 902 and wire rope 903.
S4, constructing a waterproof curtain pile 3: constructing partial waterproof curtain piles 3, and performing lap joint between adjacent waterproof curtain piles 3;
s5, constructing the H-shaped steel 5 by combining the attached drawings 5, 6 and 15: setting a waterproof curtain pile 3 which needs to be inserted into an H-shaped steel 5, wherein the H-shaped steel 5 is inserted into one at intervals according to a construction scheme, namely, in the waterproof curtain pile on the same waterproof curtain pile positioning line, every interval is one waterproof curtain pile, a limiting hole 501 is formed in a web plate of the H-shaped steel 5, before the waterproof curtain pile 3 constructed in S4 is solidified, a positioning steel frame 8 is moved to a position above the waterproof curtain pile 3 which needs to be inserted into the H-shaped steel 5, when the positioning steel frame 8 is moved, the positioning steel frame 8 is slid forwards after a first nut 24 is unscrewed, the H-shaped steel 5 is positioned by using the positioning rod 802, the H-shaped steel 5 is inserted into the waterproof curtain pile 3, when the H-shaped steel 5 is inserted, a small steel hook 902 hooks a hanging ring 803, a large steel hook 901 hooks the limiting hole 501, the insertion depth of the H-shaped steel 5 is controlled through a steel wire rope 903, and the top end of the H-shaped steel 5 is exposed out of the upper surface of the waterproof curtain pile 3 by 30 cm.
S6, repeating S4-S5 until the waterproof curtain piles 3 and the H-shaped steel 5 on the same waterproof curtain pile positioning line are constructed completely, in the process, before the positioning steel frame 8 is moved, separating the elevation controller 9 from the H-shaped steel 5, connecting the inserted H-shaped steel 5 and the positioning rod 802 above the H-shaped steel 5 by using the elevation controller 9 again after the positioning rod 802 is moved to the insertion position of the next batch of H-shaped steel 5, completing the construction of the waterproof curtain piles 3 and the H-shaped steel 5 on the same waterproof curtain pile positioning line, detaching the elevation controller 9 after the H-shaped steel 5 and the waterproof curtain piles 3 reach the designed strength, unscrewing the first nut 24, sequentially detaching the limiting plate 23 and the vertical ribs 22, and removing the positioning steel frame 8 as shown in figure 16; for the water-stop curtain piles 3 and the H-shaped steel 5 on the non-intersected water-stop curtain pile positioning line, the steps S3-S6 are also synchronously performed to improve the construction speed, as shown in FIG. 15.
S7, repeating S3-S6 to complete the construction of the waterproof curtain piles 3 and the H-shaped steel 5 on all waterproof curtain pile positioning lines; as shown in fig. 5, 7 and 17, angle steels 15 are arranged on two sides of an exposed H-shaped steel 5 to connect the H-shaped steel 5 into a whole, and the steel pipe directional piles 7 around the H-shaped steel 5 are pulled out, connecting holes 502 corresponding to each other are arranged on flanges on two sides of the H-shaped steel 5, two angle steels 15 on the same row of water-proof curtain piles 3 are fixed through a split bolt 16 penetrating through the connecting holes 502 and a nut 17 arranged at two ends of the split bolt, and at a corner of a foundation pit, two groups of intersected angle steels 15 are fixed by an L-shaped steel 18 and a nut 19.
And S8, excavating a foundation pit in the area between the waterproof curtain piles 3, leveling the pit bottom after excavating to the designed elevation, and arranging a water stopping ditch 21 at the upper part of the foundation pit.
And S9, constructing a bottom-sealing curtain pile 4 at the bottom of the foundation pit by combining the drawings of 1, 18 and 19, wherein the bottom-sealing curtain pile 4 and the waterproof curtain pile 3 are arranged in a staggered and intersected mode, the bottom-sealing curtain pile 4, the waterproof curtain pile 3 and the bottom-sealing curtain pile 4 are connected in a lap joint mode, and soil body reinforcement seepage-proofing construction of the bottom-sealing curtain pile 4 is carried out on the bottom surface of the whole foundation pit.
S10, as shown in the attached drawing 20, at four corner positions of the joint of the waterproof curtain pile 3 and the bottom-sealing curtain pile 4, non-lap joints exist, because at the four corner positions of the waterproof curtain pile 3, the bottom-sealing curtain pile 4 is difficult to be effectively lapped with the waterproof curtain pile 3, the non-lap joints are used for sealing grouting 20 construction between piles, the sealing grouting 20 between piles is constructed through a grouting device, the grouting device comprises a drill 10, a steel pipe wall 11, a drill rod 12 and a grouting pipe 14, as shown in the attached drawings 8 and 9, the upper surface of the drill 10 is provided with a connecting hole 1001 and a connecting groove 1002, as shown in the attached drawings 10 and 11, the steel pipe wall 11 is provided with a plurality of grout outlets 1101, and the concrete steps comprise:
s10.1, as shown in attached figures 10 and 11, a drill rod 12 is screwed into a connecting hole 1001, a steel pipe wall 11 is screwed into a connecting groove 1002, and the top of the drill rod 12 is fixed with the top of the steel pipe wall 11 through a fixing nut 13;
s10.2, the upper portion of a drill rod 12 is connected with a drilling machine, drilling is conducted at four corners of a waterproof curtain pile 3, when the waterproof curtain pile 3 is drilled to the height of the pile bottom elevation, a fixing nut 13 is unscrewed, the drill rod 12 is reversely unscrewed and pulled out, a grouting pipe 14 is placed, a gap between the grouting pipe 14 and a steel pipe wall 11 is blocked by a flexible layer 1401, high-pressure cement paste is injected as shown in figures 12 and 13, soil bodies at the four corners are reinforced and seepage-proofing construction is conducted, and the high-water-level sand layer rigid-flexible combined pile full-section water-stopping structure shown in figures 1 and 20 is formed.
After the construction of the internal structure of the foundation pit is completed, the second unscrewing nut 16 is used for detaching the split bolt 16, the third unscrewing nut 19 is used for detaching the L-shaped steel 18, the angle steel 15 is detached, the H-shaped steel 5 is pulled out by using the pile extractor, and the angle steel 15 and the H-shaped steel 5 can be recycled.
The present invention has been described in detail with reference to the embodiments, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention still belong to the coverage of the present invention.
Claims (5)
1. The utility model provides a high water level sand bed is just gentle to be made up full section stagnant water structure which characterized in that: the waterproof curtain pile comprises a waterproof curtain pile (3), a bottom-sealed curtain pile (4), H-shaped steel (5) and connecting angle steel (15); the waterproof curtain piles (3) are enclosed to form a foundation pit, the adjacent waterproof curtain piles (3) are mutually overlapped, H-shaped steel (5) are arranged in the waterproof curtain piles (3) on the same straight line at intervals, the top ends of the H-shaped steel (5) are exposed out of the top surfaces of the waterproof curtain piles (3), and connecting angle steel (15) are fixed on two sides of the H-shaped steel (5) on the same straight line; the bottom-sealed curtain piles (4) are arranged at the bottom of the foundation pit, the adjacent bottom-sealed curtain piles (4) are mutually lapped, and the outermost circle of bottom-sealed curtain piles (4) is lapped with the adjacent waterproof curtain piles (3).
2. The high water level sand layer rigid-flexible combined pile full-section water stop structure according to claim 1, characterized in that: the connecting angle steels (15) at two sides of the H-shaped steel (5) on the same straight line are connected through the split bolts (16) and are locked through the nuts II (17) at two ends of the split bolts (16).
3. The high water level sand layer rigid-flexible combined pile full-section water stop structure according to claim 1, characterized in that: connecting angle steels (15) on two sides of the H-shaped steel (5) in the two rows of intersected waterproof curtain piles (3) are connected with each other, and the intersected positions of the connecting angle steels (15) are fixed by L-shaped steel (18) and nuts III (19).
4. The high water level sand layer rigid-flexible combined pile full-section water stop structure according to claim 1, characterized in that: the waterproof curtain pile (3) and the back cover curtain pile (4) are connected at four corners, non-lap joints are arranged at the positions, and inter-pile closed grouting (20) is arranged at the non-lap joints.
5. The high water level sand layer rigid-flexible combined pile full-section water stop structure according to claim 1, characterized in that: the top end of the H-shaped steel (5) is exposed out of the waterproof curtain pile (3) by 30 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021894441.8U CN213836708U (en) | 2020-09-02 | 2020-09-02 | High water level sand bed rigid and flexible combined pile full-section water stop structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021894441.8U CN213836708U (en) | 2020-09-02 | 2020-09-02 | High water level sand bed rigid and flexible combined pile full-section water stop structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213836708U true CN213836708U (en) | 2021-07-30 |
Family
ID=77004593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021894441.8U Expired - Fee Related CN213836708U (en) | 2020-09-02 | 2020-09-02 | High water level sand bed rigid and flexible combined pile full-section water stop structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213836708U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114108639A (en) * | 2021-11-17 | 2022-03-01 | 上海市机械施工集团有限公司 | Construction method for foundation pit bottom sealing |
-
2020
- 2020-09-02 CN CN202021894441.8U patent/CN213836708U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114108639A (en) * | 2021-11-17 | 2022-03-01 | 上海市机械施工集团有限公司 | Construction method for foundation pit bottom sealing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104612162B (en) | A kind of Deep Foundation Pit of Metro Stations excavation construction method | |
| CN105672348A (en) | Construction method for cropping bridge pile foundation at sandy gravel stratum of abyssal region | |
| CN112227379B (en) | Construction method of high-water-level sand bed rigid-flexible combined pile full-section waterproof curtain | |
| CN111560962A (en) | Backfill area foundation pit supporting structure and construction method thereof | |
| CN106193047B (en) | Big width base pit stand construction | |
| CN107620316B (en) | Rock riverbed large-volume deepwater foundation construction method | |
| CN206706783U (en) | A kind of reusable foundation pit supporting construction | |
| CN111335319A (en) | Construction method of high-pressure jet grouting pile water-stop curtain open caisson | |
| CN213836708U (en) | High water level sand bed rigid and flexible combined pile full-section water stop structure | |
| CN109989392B (en) | Construction grooving process for sandy soil underground continuous wall | |
| CN102235007B (en) | Method for supporting deep foundation with upper nail-lower pile combination | |
| CN110777775A (en) | Foundation pit structure and construction method thereof | |
| US20210025188A1 (en) | System, method and apparatus for servicing support poles | |
| CN105484270B (en) | Reinforcement protection construction method of high steep old rubble retaining wall adjacent to deep foundation pit | |
| CN111042161A (en) | Slope collapse high slope flexible processing structure and construction method thereof | |
| CN111779022A (en) | Novel structure of underground comprehensive pipe gallery in anti-settling and anti-inclining soft soil foundation and construction method thereof | |
| CN110258600A (en) | A kind of vertical cofferdam construction engineering method suitable for deep water waters | |
| CN111519647A (en) | Novel foundation suitable for marine soft foundation treatment and reinforcement and construction method | |
| CN210530848U (en) | Large-span small-clear-distance asymmetric section tunnel supporting structure in loess region | |
| CN105113513A (en) | Anti-seepage foundation pit supporting structure and construction method | |
| CN105040705A (en) | Ground foundation treatment construction technology under multi-karst-cave geological conditions | |
| CN106284415B (en) | A kind of water intake caisson hangs floating construction method | |
| CN115030731A (en) | Pilot tunnel construction method in cross tunnel engineering | |
| CN209687506U (en) | Wear river shallow buried covered excavation electric power tunnel constructing structure | |
| CN109736843B (en) | Reverse waterproof method for assembling and pouring two linings of small template |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210730 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |