CN111778992A - Construction method for crossing U-shaped channel section of old city building group area - Google Patents
Construction method for crossing U-shaped channel section of old city building group area Download PDFInfo
- Publication number
- CN111778992A CN111778992A CN202010620603.7A CN202010620603A CN111778992A CN 111778992 A CN111778992 A CN 111778992A CN 202010620603 A CN202010620603 A CN 202010620603A CN 111778992 A CN111778992 A CN 111778992A
- Authority
- CN
- China
- Prior art keywords
- cast
- construction method
- pile
- crossing
- place pile
- 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.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/40—Miscellaneous comprising stabilising elements
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a construction method for crossing U-shaped channel sections in old city building group areas, which comprises the following steps: step 1) pre-reinforcing the foundation of a canal side building; step 2) constructing bored piles at two sides of the channel; step 3), excavating the foundation pit to a preset depth, wherein the excavation width is close to the inner side of the cast-in-place pile, and the cast-in-place pile is used as a foundation pit supporting pile; step 4), laying plain concrete at the bottom of the foundation pit; and 5) pouring a layer of veneering reinforced concrete attached to the cast-in-place pile on the inner side of the cast-in-place pile so as to plug the gap of the cast-in-place pile and integrate with the cast-in-place pile. The construction method simplifies the construction process, cancels the masonry work of a large number of concrete structures of the original channel, shortens the construction period, particularly solves the problem that large-scale equipment is difficult to intervene, and greatly reduces the construction difficulty of the channels of old city buildings.
Description
Technical Field
The invention relates to the field of old city reconstruction, in particular to a construction method for passing through a U-shaped channel section of a building group area of an old city.
Background
With the continuous progress and development of society, the construction of supporting facilities such as house buildings and the like in a plurality of old cities is basically perfect, but the treatment of river channels in cities is lagged, and the construction is greatly hindered when the river channel treatment work is carried out at the later stage. According to the site and field paying-off investigation, the construction environmental factors are mainly influenced: (1) buildings on two sides of the river channel are close to the channel, and the adjacent side load is large; (2) the phenomena of old buildings, poor foundations, illegal floor increase and the like are avoided; (3) both sides are occupied by buildings, and the construction space is small.
Direct impact of the construction environment on the construction: (1) the river foundation pit slope-placing excavation line goes deep into the surrounding buildings, and slope-placing excavation cannot be formed. (2) If the slope excavation is normally carried out, obstacles on two sides of a river channel need to be cleared, the clearing area is large, related units are involved, the influence range is wide, the expropriation work is extremely difficult, and the situation that the expropriation fund is huge is involved.
In order to avoid the influence caused by large-scale expropriation work, in general, firstly a foundation pit supporting measure is taken and then excavation is carried out, and then the construction of a U-shaped channel concrete structure is carried out in the foundation pit. The more foundation pit supporting forms that adopt at present have: the concrete enclosure wall, the steel sheet pile and the inner support, the underground continuous wall and the support, the bored pile row pile, the inner support system and the like.
For buildings with two sides of a foundation pit close to a building group, the cement soil enclosure wall has weak bearing capacity and has great potential safety hazards; the form of the steel sheet pile and the inner support can generate vibration to cause adverse effect on the adjacent building, the inner support structure is not beneficial to construction, the secondary utilization condition of pulling out the steel sheet pile is not provided, and the investment is increased; the investment for one time of adding the support to the underground continuous wall is high, the construction process is complex, the construction is inconvenient, the selected equipment is large and more, and the danger coefficient is high in the environment of a small space; the row pile construction of the cast-in-situ bored pile has the defects that the gaps among the piles easily cause water and soil loss, and the problem is obvious particularly in areas with high water level and soft clay.
As shown in fig. 1, for the U-shaped section of the existing channel, under the condition that the two sides of the channel do not have the excavation slope-laying condition, the two sides of the foundation pit are firstly supported by the cast-in-place piles 3 for supporting the foundation pit, and then the construction of the U-shaped channel is carried out after the foundation pit is excavated, including building the reinforced concrete side wall 10 and the reinforced concrete bottom plate 11, and arranging the drainage holes 4. Therefore, the additional increased safety protection cost of the foundation pit is high, the construction period is long, the cost is high, and the long precipitation time also causes the large hidden danger of settlement of buildings on two sides due to the influence of narrow construction site and complex construction process.
Therefore, a construction scheme which is safe for the adjacent building, avoids settlement influence caused by long-time foundation pit precipitation and is lower in construction period, flow and cost needs to be developed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a construction method for crossing the U-shaped channel section in the building group area of the old city, which simplifies the construction process, cancels the masonry work of a large number of concrete structures of the original channel, shortens the construction period, solves the problem that large equipment is difficult to intervene, and reduces the construction difficulty.
In order to achieve the purpose, the invention adopts the technical scheme that: a construction method for crossing U-shaped channel sections in old city building group areas comprises the following steps:
step 1) pre-reinforcing the foundation of a canal side building, and adopting a corresponding reinforcing and protecting scheme according to a house foundation structure;
step 2) performing bored pile construction on two sides of the channel by using a rotary drilling machine and a slurry pump;
step 3), excavating the foundation pit to a preset depth, wherein the excavation width is close to the inner side of the cast-in-place pile, and the cast-in-place pile is used as a foundation pit supporting pile;
step 4), laying plain concrete at the bottom of the foundation pit;
and 5) pouring a layer of veneering reinforced concrete attached to the cast-in-place pile on the inner side of the cast-in-place pile so as to plug the gap of the cast-in-place pile and integrate with the cast-in-place pile.
Basically, in the step 1), for houses with brick and stone foundations, precainforcement is carried out by adopting measures of protective foundation grouting, reinforced concrete ground beams or slope excavation grouting.
And 4, reinforcing the building with the concrete foundation structure in the step 1 in a reinforced concrete ground beam mode.
In the step 2), during the drilling process, slurry or clean water is conveyed to the drill rod by a slurry pump to wash the bottom of the hole, the flushing fluid carrying the rock debris rises along the annular space between the drill rod and the hole wall and flows into a sedimentation tank from the hole opening, and the flushing fluid is reused as the flushing fluid after sedimentation and purification, so that a positive circulation deslagging system is formed.
Basically, in the step 2), the cast-in-place pile is reinforced by double rows of pile bodies.
And 4), arranging a drain hole at the bottom of the foundation pit of the plain concrete in the step 4).
And 5), cleaning mud skins on the surface of the cast-in-place pile, and driving the dowel bars into the pile body to serve as a reinforcing foundation of the veneered reinforced concrete.
And 5), after the steel bars are inserted, weaving a layer of steel bar mesh on the surface of the pile body, binding and fixing the steel bar mesh and the steel bars, reserving a concrete protective layer, and pouring overlay concrete to form an overlay reinforced concrete layer.
And the inserting bars are inserted into the pile body by 30-40cm, and the thickness of the veneered reinforced concrete is 20-30 cm.
Compared with the prior art, the invention has outstanding substantive characteristics and obvious progress, particularly, the invention effectively solves the potential safety hazard problem of old buildings such as houses at two sides of the channel caused by excavation of the foundation pit, simultaneously avoids increasing the cost caused by large-scale temporary foundation pit safety protection, and can effectively replace the prior U-shaped channel water passing.
Specifically, after the channel is excavated, because concrete side walls do not need to be built, the bottom of the canal is no longer a main stress structure, and the main problem that faces is that the channel is prevented from being washed away by water, so that a reinforced concrete structure does not need to be laid at the bottom of the canal, and only plain concrete is needed, so that pouring at the bottom of the canal can be completed quickly, the drainage time is reduced greatly, and the potential hazard of settlement caused by surrounding buildings is effectively prevented.
The temporary supporting structure of the cast-in-place pile is changed into a permanent water cross-section structure, an original large-volume concrete structure of a channel is omitted, the engineering cost is greatly reduced, the intervention of too many large-scale equipment is avoided, the construction flow is simplified, the width of a foundation pit is relatively increased, and the limited degree of a construction activity space is reduced.
The construction process is simplified, the construction period after excavation is shortened, the construction strength is reduced, and the construction cost is reduced.
Drawings
Fig. 1 is a construction structure diagram of a U channel section in the background art.
FIG. 2 is a channel cross-section diagram constructed by the construction method of the cross-section of the U-shaped channel passing through the old city building group area.
In the figure: 1. veneering reinforced concrete; 2. plain concrete; 3. filling piles; 4. a drain hole; 5. a guardrail; 6. a left house; 7. a right house; 8. original design slope line; 9. inserting ribs; 10. a reinforced concrete side wall; 11. reinforced concrete bottom plate.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
As shown in fig. 2, a construction method for crossing a U-shaped channel section in an old city building group area comprises the following steps:
step 1) pre-reinforcing the foundation of a building at the edge of a canal, adopting a corresponding reinforcing and protecting scheme according to the foundation structure of a house, and pre-reinforcing the house with brick and stone foundations by adopting measures of protective foundation grouting, reinforced concrete ground beams or slope excavation grouting; in the step 1, the building with the concrete foundation structure is reinforced in a reinforced concrete ground beam mode.
Step 2) drilling cast-in-place piles on two sides of a channel are constructed by using a rotary drilling machine and a slurry pump, during the drilling process, slurry or clean water is conveyed to a drill rod by using the slurry pump to wash the bottom of a hole, flushing fluid carrying rock debris rises along the annular space of the drill rod and the hole wall and flows into a sedimentation tank from an orifice, and the flushing fluid is reused as the flushing fluid after sedimentation and purification to form a positive circulation deslagging system; with the continuous discharge of the drilling slag, the drill hole continuously extends downwards until a predetermined hole depth is reached. The construction process has no vibration, low noise and less influence on the surrounding environment. And the bored pile has the characteristics of high bearing capacity, small settlement and the like, the wall body has high strength, high rigidity, good supporting stability and small deformation, each bored pile can be synchronously constructed, the operation of a construction period is facilitated, the selection of equipment is flexible, and the main equipment is small-sized drilling machinery.
In other embodiments, the cast-in-place pile is reinforced by double rows of pile bodies in order to enhance the supporting strength of the foundation pit.
And 3) excavating the foundation pit to a preset depth, wherein the excavation width is close to the inner side of the cast-in-place pile 3, the cast-in-place pile 3 is used as a foundation pit supporting pile, and after the foundation pit is excavated, a channel U-shaped reinforced concrete structure is not additionally constructed, and the supporting structure of the cast-in-place pile 3 is used as a part of a permanent water passing section structure, so that the steel bar binding and the formwork amount are greatly reduced, and the construction time is shortened.
And 4) laying plain concrete 2 at the bottom of the foundation pit, and arranging a drain hole 4 at the bottom of the foundation pit of the plain concrete 2. Because the bottom of the foundation pit is no longer a main stressed structure, the channel is mainly prevented from being washed by water, therefore, the bottom plate is not provided with a reinforced concrete structure, plain concrete is adopted, and the pouring thickness is greatly reduced.
And 5) pouring a layer of veneered reinforced concrete 1 attached to the cast-in-place pile on the inner side of the cast-in-place pile so as to block the gap of the cast-in-place pile 3 and form a whole with the cast-in-place pile 3, and arranging guardrails 5 on two sides of the ground of the foundation pit after construction.
Specifically, firstly, cleaning mud on the surface of the cast-in-place pile 3, driving the dowel bars 9 into the pile body, and inserting the dowel bars 9 into the pile body by 30-40cm to serve as a reinforcing foundation of the veneered reinforced concrete 1. After the insertion bars 9 are finished, weaving a layer of reinforcing mesh on the surface of the pile body, binding and fixing the reinforcing mesh and the insertion bars, reserving a concrete protective layer, and then pouring overlay reinforced concrete to form an overlay reinforced concrete layer, wherein the thickness of the overlay reinforced concrete is 20-30cm, and the specific thickness is determined according to geological conditions and over-flow.
This scheme is through adopting "bored concrete pile + wainscot concrete" to replace former "U" channel to cross the sectional type of water in the construction, and the effectual potential safety hazard problem that causes old buildings such as channel left side house 6 and right side house 7 of having solved foundation ditch excavation simultaneously avoids increasing on a large scale interim foundation ditch safety protection and the expense that causes to can the effectual former "U" type channel of substitution cross water.
By referring to the position of the original design slope line 8, the scheme avoids the dismantling work of houses on two sides.
The scheme is tested in a project of continuous construction and matching and water-saving reconstruction of irrigation areas of Shahehuai stores in Shenhilly county, and a U-shaped water channel of the project is located in an old town area of the Sophora stores in Shenhilly county and is reconstructed for an old river channel in the county center. The channel length is 983m, the channel is U-shaped section, the external dimension is 4.8m high, 8.6m wide. Both sides along the channel are resident living rooms, commercial rooms and the like, the distance from the channel is about 2-5 m, most houses are old house buildings which are long in the ages, the foundation is shallow, the phenomenon of later-period private capping exists, and particularly the south side of the channel is a main structure of the house.
The construction is carried out by adopting the 'cast-in-situ bored pile and veneered concrete' to replace a 'U' channel water passing section, so that the construction problem in the adverse environment is effectively solved.
Through calculation, bored piles with the diameter of 0.5m, the hole spacing of 0.8m and the hole depth of 12m are arranged on the two sides of the channel, and a rotary drilling machine is adopted for drilling. The safety protection of the foundation pit can be guaranteed for a long time through the construction of the cast-in-situ bored pile, and meanwhile, the rotary drilling machine is adopted for drilling, so that the influence of vibration on adjacent buildings is avoided.
After the cast-in-situ bored pile reaches the strength, earth excavation is carried out, and the plain concrete bottom protector with the thickness of 20cm is poured to replace the original reinforced concrete bottom protector with the thickness of 70cm, so that the construction process is simplified, the engineering quantity is reduced, the drainage time is greatly shortened, and the potential sedimentation hazard caused by long-term drainage to adjacent buildings is avoided.
And (3) embedding a 30cm dowel bar into the inner side of the cast-in-situ bored pile, connecting the dowel bar with a layer of reinforcing mesh, and then pouring a layer of veneered concrete with the thickness of 30cm, wherein the concrete is deep into the space between the piles by 10 cm. Make bored concrete pile interconnect form wholly, better, replace original reinforced concrete side wall structure simultaneously, the work load that has significantly reduced has reduced construction strength, has reduced construction cost.
Through the construction of the section type, the safety of buildings on two sides of the channel is guaranteed, meanwhile, unnecessary engineering investment is saved, the construction period is shortened, and the construction cost is greatly reduced. After the channel is filled with water, the operation is normal, the favorable comments of owners, supervisors and surrounding people are obtained, and good economic benefit and social benefit are created.
Finally, it should be noted that the above-mentioned embodiments illustrate only some of the embodiments of the invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (9)
1. A construction method for crossing U-shaped channel sections in old city building group areas is characterized by comprising the following steps: the method comprises the following steps:
step 1) pre-reinforcing the foundation of a canal side building, and adopting a corresponding reinforcing and protecting scheme according to a house foundation structure;
step 2) performing bored pile construction on two sides of the channel by using a rotary drilling machine and a slurry pump;
step 3), excavating the foundation pit to a preset depth, wherein the excavation width is close to the inner side of the cast-in-place pile, and the cast-in-place pile is used as a foundation pit supporting pile;
step 4), laying plain concrete at the bottom of the foundation pit;
and 5) pouring a layer of veneering reinforced concrete attached to the cast-in-place pile on the inner side of the cast-in-place pile so as to plug the gap of the cast-in-place pile and integrate with the cast-in-place pile.
2. The construction method for crossing the U-shaped channel section in the old city building group area according to claim 1, which is characterized in that: in the step 1), for houses with brick and stone foundations, adopting measures of protective foundation grouting or reinforced concrete ground beams or slope excavation grouting to perform pre-reinforcement.
3. The construction method for crossing the U-shaped channel section in the old city building group area according to claim 1, which is characterized in that: in the step 1, the building with the concrete foundation structure is reinforced in a reinforced concrete ground beam mode.
4. The construction method for crossing the U-shaped channel section in the old city building group area according to claim 1, which is characterized in that: in the step 2), during the drilling process, slurry or clean water is conveyed to the drill rod by a slurry pump to wash the bottom of the hole, the flushing liquid carrying the rock debris rises along the annular space between the drill rod and the hole wall and flows into a sedimentation tank from the hole opening, and the flushing liquid is reused as the flushing liquid after sedimentation and purification, so that a positive circulation deslagging system is formed.
5. The construction method for crossing the cross section of the U-shaped channel in the old city building group area according to any one of claims 1 to 4, wherein the construction method comprises the following steps: in the step 2), the cast-in-place pile is reinforced by double rows of pile bodies.
6. The construction method for crossing the cross section of the U-shaped channel in the old city building group area according to any one of claims 1 to 4, wherein the construction method comprises the following steps: and 4) arranging a drain hole at the bottom of the foundation pit of the plain concrete.
7. The construction method for crossing the cross section of the U-shaped channel in the old city building group area according to any one of claims 1 to 4, wherein the construction method comprises the following steps: and 5), cleaning mud skins on the surface of the cast-in-place pile, and driving the dowel bars into the pile body to serve as a reinforcing foundation for the veneered reinforced concrete.
8. The construction method for crossing the U-shaped channel section in the old city building group area according to claim 7, wherein the construction method comprises the following steps: and 5) after the steel bars are inserted, weaving a layer of steel bar mesh on the surface of the pile body, binding and fixing the steel bar mesh and the steel bars, reserving a concrete protective layer, and pouring overlay concrete to form an overlay reinforced concrete layer.
9. The construction method for crossing the U-shaped channel section in the old city building group area according to claim 8, wherein the construction method comprises the following steps: the inserting bars are inserted into the pile body by 30-40cm, and the thickness of the veneered reinforced concrete is 20-30 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010620603.7A CN111778992A (en) | 2020-07-01 | 2020-07-01 | Construction method for crossing U-shaped channel section of old city building group area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010620603.7A CN111778992A (en) | 2020-07-01 | 2020-07-01 | Construction method for crossing U-shaped channel section of old city building group area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111778992A true CN111778992A (en) | 2020-10-16 |
Family
ID=72759966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010620603.7A Pending CN111778992A (en) | 2020-07-01 | 2020-07-01 | Construction method for crossing U-shaped channel section of old city building group area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111778992A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113174995A (en) * | 2021-04-12 | 2021-07-27 | 浙江交工地下工程有限公司 | Construction method of TRD composite type enclosure comprehensive pipe gallery close to river channel |
| CN114033214A (en) * | 2021-12-15 | 2022-02-11 | 山西五建集团有限公司 | Method for processing interchange bracing type space pile foundation of existing crack ancient urn city door with top-inlaid reconstruction |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106436720A (en) * | 2016-11-15 | 2017-02-22 | 河南省水利勘测设计研究有限公司 | Small-size deep foundation pit supporting structure for pipe jacking construction |
| CN207376767U (en) * | 2017-11-06 | 2018-05-18 | 东莞市水利勘测设计院有限公司 | A kind of inlet channel structure |
| CN108343071A (en) * | 2018-03-19 | 2018-07-31 | 南京市测绘勘察研究院股份有限公司 | A kind of foundation pit supporting construction and construction method of steel sheet pile combined deposited pile |
| CN110485377A (en) * | 2019-07-16 | 2019-11-22 | 中电建十一局工程有限公司 | A kind of light section canal lining construction method |
| CN111021408A (en) * | 2019-12-13 | 2020-04-17 | 中国一冶集团有限公司 | Construction method of water-stopping support system in pipe gallery river reach operation |
| CN111058456A (en) * | 2019-11-29 | 2020-04-24 | 中国三冶集团有限公司 | Cast-in-place pile construction method in foundation pit supporting process |
-
2020
- 2020-07-01 CN CN202010620603.7A patent/CN111778992A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106436720A (en) * | 2016-11-15 | 2017-02-22 | 河南省水利勘测设计研究有限公司 | Small-size deep foundation pit supporting structure for pipe jacking construction |
| CN207376767U (en) * | 2017-11-06 | 2018-05-18 | 东莞市水利勘测设计院有限公司 | A kind of inlet channel structure |
| CN108343071A (en) * | 2018-03-19 | 2018-07-31 | 南京市测绘勘察研究院股份有限公司 | A kind of foundation pit supporting construction and construction method of steel sheet pile combined deposited pile |
| CN110485377A (en) * | 2019-07-16 | 2019-11-22 | 中电建十一局工程有限公司 | A kind of light section canal lining construction method |
| CN111058456A (en) * | 2019-11-29 | 2020-04-24 | 中国三冶集团有限公司 | Cast-in-place pile construction method in foundation pit supporting process |
| CN111021408A (en) * | 2019-12-13 | 2020-04-17 | 中国一冶集团有限公司 | Construction method of water-stopping support system in pipe gallery river reach operation |
Non-Patent Citations (3)
| Title |
|---|
| 交通部科学研究院编写组: "《公路桥梁钻孔桩 下》", 30 June 1978, 人民交通出版社 * |
| 徐伟等: "《建筑工程分部分项施工手册1 地基基础与工程》", 31 May 1999, 中国计划出版社 * |
| 闫富有: "《地下工程施工》", 30 June 2018, 黄河水利出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113174995A (en) * | 2021-04-12 | 2021-07-27 | 浙江交工地下工程有限公司 | Construction method of TRD composite type enclosure comprehensive pipe gallery close to river channel |
| CN113174995B (en) * | 2021-04-12 | 2022-06-21 | 浙江交工地下工程有限公司 | Construction method of TRD composite type enclosure comprehensive pipe gallery close to river channel |
| CN114033214A (en) * | 2021-12-15 | 2022-02-11 | 山西五建集团有限公司 | Method for processing interchange bracing type space pile foundation of existing crack ancient urn city door with top-inlaid reconstruction |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102011404B (en) | Pit supporting structure and construction method thereof | |
| CN105239578B (en) | Water-rich sand layer deep foundation pit underwater construction method | |
| CN111560957B (en) | Shield receiving well foundation pit excavation and supporting non-dewatering construction method | |
| CN111705809A (en) | Deep foundation pit construction structure and deep foundation pit construction method | |
| CN101481911A (en) | Construction method for special underground continuous wall | |
| CN109184699B (en) | Construction method for passing existing river channel under open trench tunnel | |
| CN107869351A (en) | A kind of method of the high narrow large-scale solution cavity Cavity treatment security protection of type | |
| CN108867692A (en) | The protection of city big cross section open trench tunnel Nearby Structure and tunnel foundation pit method for digging | |
| CN111778992A (en) | Construction method for crossing U-shaped channel section of old city building group area | |
| CN112281877A (en) | Cutting high slope construction method | |
| CN112681374A (en) | Shallow-buried underground-excavated channel cover excavation top-down construction method under complex conditions | |
| CN110424372A (en) | Along road interval method in a row remove obstacles after construct diaphram wall construction method | |
| CN212641685U (en) | Underground garage drainage open ditch and blind ditch combine antiseep system | |
| CN110080234A (en) | A method of it is excavated in the secondary central island of deep foundation pit of soft soil foundation | |
| CN216765941U (en) | Tunnel decompression load shedding structure under bias voltage state | |
| CN205804366U (en) | A kind of slag runner structure | |
| CN205399401U (en) | Novel underground continuous wall of wallboard formula | |
| RU2209268C1 (en) | Process of development of foundation pit | |
| Dellaria et al. | Combining multiple techniques to complete an urban deep excavation | |
| CN112302678A (en) | Deformation control construction process for shallow tunnel of underpass building | |
| CN106013168A (en) | Slag trough structure and construction method for same | |
| Mangushev et al. | Construction of deep foundation ditch under a reconstructed multi-storey building on the main avenue of St. Petersburg | |
| CN220266625U (en) | Grouting piece stone retaining wall body grouting reinforcement structure | |
| CN114482072B (en) | Soft soil close-connection double-foundation-pit combined anchor design method, supporting structure and construction method | |
| CN219175134U (en) | Bank slope protection structure of flood discharge energy dissipation flushing 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 |