CN106592608A - Differential settlement control method for new foundation and old roadbed of utility tunnel - Google Patents
Differential settlement control method for new foundation and old roadbed of utility tunnel Download PDFInfo
- Publication number
- CN106592608A CN106592608A CN201611187093.9A CN201611187093A CN106592608A CN 106592608 A CN106592608 A CN 106592608A CN 201611187093 A CN201611187093 A CN 201611187093A CN 106592608 A CN106592608 A CN 106592608A
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- piping lane
- steel sheet
- pipe gallery
- control method
- high pressure
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Classifications
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- 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
- E02D17/06—Foundation trenches ditches or narrow shafts
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- 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
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
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- 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
- E02D17/18—Making embankments, e.g. dikes, dams
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
-
- 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
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
本发明公开了一种地下综合管廊新地基与老路基差异沉降控制方法，包括以下步骤：综合分析工程区域水文地质情况及管廊基坑开挖方案，实施排、降水措施；对拉森钢板桩进行清除表面杂质并做防锈处理后，根据测量放线、导架安装指引施打拉森钢板桩；确定高压水泥旋喷桩帷幕深度；在管廊基坑的拉森钢板桩外邻近道路一侧设置一道高压水泥旋喷桩帷幕；进行土方开挖作业，在开挖至设计标高时及时施做围檩及横撑，防止基坑变形；进行基底处理、换填及垫层施工；管廊主体结构施工及防水作业；覆土回填、拔除拉森钢板桩及拆除降水措施。本发明有效减小了管廊新地基与老路基间的差异沉降，同时减小了堆载、邻近区域施工等外部作用对管廊的影响，从而满足综合管廊及道路的正常运营需求。
The invention discloses a differential settlement control method between the new foundation and the old roadbed of an underground comprehensive utility gallery, which comprises the following steps: comprehensively analyzing the hydrogeological conditions in the engineering area and the excavation scheme of the foundation pit of the utility gallery, and implementing drainage and precipitation measures; After the piles have been cleaned of surface impurities and antirust treated, lay out Larsen steel sheet piles according to the guidelines for measuring and setting out and guide frame installation; determine the curtain depth of high-pressure cement jet grouting piles; Set up a curtain of high-pressure cement rotary grouting piles on one side; carry out earthwork excavation operations, and implement purlins and cross braces in time when the excavation reaches the design elevation to prevent deformation of the foundation pit; carry out base treatment, replacement and cushion construction; Construction and waterproofing of the main structure of the corridor; backfilling of the covering soil, removal of Larsen steel sheet piles and removal of precipitation measures. The invention effectively reduces the differential settlement between the new foundation of the pipe gallery and the old roadbed, and at the same time reduces the influence of external effects such as pile loading and construction in adjacent areas on the pipe gallery, thereby meeting the normal operation requirements of the comprehensive pipe gallery and roads.
Description
Technical field
The present invention relates to a kind of newly-built underground pipe gallery in engineering construction technology field, specifically rich water soft clay area
New ground and the different subsidence control method of old road basis.Equally, it is suitable for the similar vertical obstruct in rich water soft clay area
Settlement Control field of the wall in different sequential and between (underground) structures closer to the distance.
Background technology
Pipe gallery provides a kind of intensive, sustainability pipelining mode, can efficiently solve traditional straight
Buried municipal pipeline is the problems such as traffic jam caused in transforming renewal process and environmental pollution.With newly-built city trunk
Urban Buried Pipeline Network pipe gallery pattern is carried out in road, Urban New District, industrial park, old town transformation etc., is lifted in the whole country
The upsurge of piping lane construction has been played, and main line piping lane, branch line piping lane are generally laid in respectively car lane central authorities' greenbelt and people's row
Road or bicycle lane side point leukorrhagia, newly-built piping lane ground from first build road foundation because processing mode is different, interface is complicated,
The factor such as soft soil underlayer is unstable, groundwater effect, loads change are big and influence each other, and then produce relative settlement, cause road
Face out-of-flatness, cracking, so as to cause a series of diseases, are mainly shown as that recessed, arch camber, waveform road surface etc. are cheated in road surface, while
Long service for later pipe gallery has buried potential safety hazard.
Original path employs different foundation treatment modes, vacuum plate piling prepressing, change fill out, PTC stakes, packing sedimentation by throwing stones
Consider that the factors such as characteristics of soft clay, construction speed and economy, environmental effect generally adopt cement Deng, newly-built underground pipe gallery
Native cement mixing method Ground Treatment, piping lane foundation ditch carries out supporting using Larsen steel sheet pile that is recyclable, recycling.But piping lane ground
The settlement law of base is different from first building road, and the old and new's ground produces relative settlement due to factors such as arrangement and method for construction, soil solidifyings.State
The inside and outside research to the problems such as Freeway on Soft Ground changeover portion relative settlement, Expressway Subgrade Expansion relative settlement is very
It is many, but the rule that produces to crouch under underground pipe gallery ground and road foundation settlement and differential settlement is there is not yet document report,
Therefore the new ground of pipe gallery and old roadbed differential settlement how are effectively reduced, to the normal of pipe gallery maintenance and road
Operation uses all significant.
The content of the invention
It is an object of the invention to provide a kind of new ground of underground pipe gallery and the different subsidence control method of old road basis, with gram
Take the interaction impact and excessive relative settlement between newly-built piping lane ground and old road base and cause a series of diseases, so as to prolong
Long piping lane service life, the normal safe operation of guarantee road.
For achieving the above object, the technical solution used in the present invention is：
A kind of new ground of underground pipe gallery and the different subsidence control method of old road basis, it is characterised in that：Including following step
Suddenly：
The first step, comprehensive analysis Engineering Zone hydrological geological conditions and piping lane excavation of foundation pit scheme, implement row, precipitation and arrange
Apply；
Second step, is purged surface impurity and does after antirust treatment to Larsen steel sheet pile, is pacified according to surveying setting-out, saddle
Dress guides injection Larsen steel sheet pile；
3rd step, determines high pressure cement curtain with rotary jet grouting piles depth；
4th step, in the outer neighbouring road side of the Larsen steel sheet pile of piping lane foundation ditch one high pressure cement rotary churning pile curtain is arranged
Curtain；
5th step, carries out earth excavation operation, performs in time when piping lane design of foundation pit absolute altitude is excavated to and encloses purlin and stull,
Prevent piping lane foundation pit deformation；
6th step, the piping lane foundation ditch after excavating to the 5th step carries out base treatment, changes and fill out and cushion construction；
7th step, piping lane main structure construction and waterproof homework；
8th step, earthing backfills, pulls out Larsen steel sheet pile and remove dewatering measure.
Further, in the 3rd described step, when road foundation is processed using vacuum plate piling prepressing mode, high pressure
Cement curtain with rotary jet grouting piles depth should be greater than draining plate depth.
Further, in the 4th described step, high pressure cement curtain with rotary jet grouting piles makes by the following method：Set by drilling
It is standby that playpipe is transferred the depth determined to the 3rd step, water under high pressure slurry jet is sprayed by nozzle, with the rotation of jet pipe
With lifting, the water under high pressure mud jet cutting destruction soil body, cement mortar and soil are mixed to stir to form pile body, make road with piping lane basis
Between form one divider wall.This method serve soil mass consolidation, intercept water, the effect of sealing, and equipment drilling depth is deeper, no
By the long restriction of stake, construction is simple, and progress is fast, can multiple spot construction on a large scale.
Further, in the 5th described step, the principle of earth excavation is：Hierarchical block, symmetrical balance, first support and dig afterwards,
Prop up, forbid to backbreak when digging.
Further, in the 6th described step, the mattress layer that the basement process course filled out is cement stabilizing aggregate chips is changed,
There is reinforced concrete soil padding on its top and extends to Larsen steel sheet pile side, and the horizontal stiffness for forming steel sheet pile bottom is supported.
Further, in the 8th described step, earthing backfill meets following requirement：Backfill construction is in piping lane concrete strength
Can carry out when reaching 95% design strength；, using medium coarse sand or clay, piping lane both sides must be uniform for the backfill material of earthing backfill
Symmetrical backfill；Banket and require compaction in layers, adopt in the above 500mm altitude range of pipe top and manually pound or light-duty machinery compacting,
Pipe top above 0.5m～1m scopes are constructed using light-duty static(al) formula rolling compaction machine；Backfill soil compaction meets related specifications and design
Require.
Beneficial effect：The method of the present invention is transferred playpipe to desired depth by drilling equipment, by water under high pressure mud
Jet is sprayed by nozzle, with rotation and the lifting of jet pipe, the water under high pressure mud jet cutting destruction soil body, by cement mortar and soil
Mix and stir to form pile body, play soil mass consolidation, intercept water, the effect of sealing, make to be formed between road piling prepressing area and piping lane basis
One divider wall, it is to avoid piping lane ground is affected by external force such as piling prepressings and settles.Major advantage is as follows：
(1) sealing performance is good, forms isolation curtain wall, can effectively intercept the transmission of side pore water pressure；
(2) affected less by external force such as piling prepressings；
(3) drilling depth is deeper, can the deeper soil layer of consolidation process；
(4) applied widely, construction is simple, and progress is fast, can multiple spot construction on a large scale.
High pressure cement curtain with rotary jet grouting piles is in newly-built piping lane ground and first builds and define between road foundation divider wall, effectively weakens
Therebetween interaction affects, and solves the problems, such as basement process difference interface, is ensureing piping lane work progress
While its own construction quality, the impact to road is preferably minimized, while road piling prepressing, external loads, adjacent domain
The external actions such as construction are greatly reduced to the long-term safety Influence to operation of piping lane, reduce secondary reparation and maintenance cost, are extended
Structure service life.
Description of the drawings
Fig. 1 is the position relationship schematic diagram in the present invention between each measure.
In figure, 1- old roads base, 2- Larsen steel sheet piles, 3- high pressure cement curtain with rotary jet grouting piles, 4- cement gravel mattress layers.
Specific embodiment
The present invention is further described below in conjunction with the accompanying drawings.
As shown in figure 1, the new ground of the underground pipe gallery suitable for rich water soft clay area of the present invention is different with old road basis
Subsidence control method, comprises the following steps that：
(1) comprehensive analysis Engineering Zone hydrological geological conditions and piping lane excavation of foundation pit scheme, implement rational dewatering measure；
(2) surface impurity is purged to Larsen steel sheet pile 2 and is done after antirust treatment, installed according to surveying setting-out, saddle
Guide injection Larsen steel sheet pile；
(3) high pressure cement curtain with rotary jet grouting piles depth is determined, when road foundation is processed using vacuum plate piling prepressing mode
When, in order to eliminate the impact of the external force such as road preloading, the depth of high pressure cement curtain with rotary jet grouting piles should be greater than draining plate depth；
(4) one high pressure cement curtain with rotary jet grouting piles 3 is set outside piping lane foundation ditch steel sheet pile, and high pressure cement curtain with rotary jet grouting piles passes through
Following methods make：Playpipe is transferred by the depth determined to the 3rd step by drilling equipment, water under high pressure slurry jet is passed through
Nozzle sprays, and with rotation and the lifting of jet pipe, the water under high pressure mud jet cutting destruction soil body, cement mortar and soil is mixed to stir to be formed
Pile body, make road and piping lane basis between formed together with divider wall；
(5) with hierarchical block, symmetrical balance, first support and dig afterwards, while dig while prop up, forbid the principle backbreak to carry out earth excavation work
Industry, performs in time when designed elevation is excavated to and encloses purlin and stull, prevents foundation pit deformation；
(6) base treatment is carried out, is changed and is filled out and cushion construction, it is ensured that the operation in dry environment of piping lane construction of bottom plates, changed and fill out
Material, blinding concrete etc. must meet related specifications；It is cement gravel mattress layer 4 to change the basement process course filled out, it is therefore an objective to
Make to change the material filled out and form entirety, there is reinforced concrete soil padding on its top and extends to Larsen steel sheet pile side, form steel sheet pile bottom
The horizontal stiffness in portion is supported, and prevents steel sheet pile early deformation excessive, it is to avoid outer surface subsidence of basement high, foundation ditch etc. is unfavorable existing
As；
(7) piping lane agent structure concrete pouring construction and waterproof measure is carried out.Buried water stop in piping lane deformation joint
Must be accurately positioned, strictly fix, prevent from being shifted during concrete perfusion, deform, not have stagnant water effect, or cast both sides coagulation
When native, due to arbitrarily collision, waterstop is caused to deviate, overlap bad and cause serious leakage；
(8) earthing backfills, pulls out Larsen steel sheet pile and remove dewatering measure.Backfill construction reaches in piping lane concrete strength
Can carry out during 95% design strength；, using medium coarse sand or clay, piping lane both sides must be symmetrically for the backfill material of earthing backfill
Backfill；Banket and require compaction in layers, adopt in the above 500mm altitude range of pipe top and manually pound or light-duty machinery compacting, pipe top
Above 0.5m～1m scopes are constructed using light-duty static(al) formula rolling compaction machine；Backfill soil compaction meets related specifications and design will
Ask.
In the present invention, first build road foundation using vacuum plate piling prepressing, PTC stakes, change and the Different treatments such as fill out, and
Newly-built pipe gallery is generally laid in car lane central authorities' greenbelt and footpath or bicycle lane side point leukorrhagia, newly-built piping lane
Ground from first build road foundation because processing mode is different, interface is complicated, soft soil underlayer is unstable, groundwater effect, load
Change the factor such as big and influence each other, and then produce relative settlement, cause pavement roughness, cracking, so as to cause a series of diseases
Evil, is mainly shown as that recessed, arch camber, waveform road surface etc. are cheated in road surface, while also the long service for pipe gallery in future is buried
Potential safety hazard.Row's high pressure cement rotary churning pile curtain is arranged by closing on road side outside supporting construction (such as Larsen steel sheet pile)
Curtain, make road and piping lane basis between formed together with divider wall, not only weaken impact therebetween, also played compacted soil
Body, intercept water, the effect of sealing, the relative settlement between the new ground of piping lane and old road base is effectively reduced, while reducing outer masterpiece
With the impact to piping lane, so as to the normal safe for meeting piping lane and road runs demand, extend its service life.Equally, this
It is bright be also applied for the similar vertical obstruct wall in rich water soft clay area in different sequential and (underground) structures closer to the distance between
Settlement Control field.
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (6)
1. a kind of new ground of underground pipe gallery and the different subsidence control method of old road basis, it is characterised in that：Comprise the following steps：
The first step, comprehensive analysis Engineering Zone hydrological geological conditions and piping lane excavation of foundation pit scheme, implement row, dewatering measure；
Second step, is purged surface impurity and does after antirust treatment to Larsen steel sheet pile, is installed according to surveying setting-out, saddle and is referred to
Draw injection Larsen steel sheet pile；
3rd step, determines high pressure cement curtain with rotary jet grouting piles depth；
4th step, in the outer neighbouring road side of the Larsen steel sheet pile of piping lane foundation ditch one high pressure cement curtain with rotary jet grouting piles is arranged；
5th step, carries out earth excavation operation, performs in time when piping lane design of foundation pit absolute altitude is excavated to and encloses purlin and stull, prevents
Piping lane foundation pit deformation；
6th step, the piping lane foundation ditch after excavating to the 5th step carries out base treatment, changes and fill out and cushion construction；
7th step, piping lane main structure construction and waterproof homework；
8th step, earthing backfills, pulls out Larsen steel sheet pile and remove dewatering measure.
2. the new ground of underground pipe gallery according to claim 1 and the different subsidence control method of old road basis, its feature exists
In：In the 3rd described step, when road foundation is processed using vacuum plate piling prepressing mode, high pressure cement curtain with rotary jet grouting piles
Depth should be greater than draining plate depth.
3. the new ground of underground pipe gallery according to claim 1 and the different subsidence control method of old road basis, its feature exists
In：In the 4th described step, high pressure cement curtain with rotary jet grouting piles makes by the following method：Playpipe is transferred by drilling equipment
To the depth that the 3rd step determines, water under high pressure slurry jet is sprayed by nozzle, with rotation and lifting, the high pressure cement of jet pipe
The slurry jet cutting destruction soil body, cement mortar and soil are mixed to stir to form pile body, make to be formed between road and piping lane basis and isolate together
Wall.
4. the new ground of underground pipe gallery according to claim 1 and the different subsidence control method of old road basis, its feature exists
In：In the 5th described step, the principle of earth excavation is：Hierarchical block, symmetrical balance, first support and dig afterwards, prop up, forbid to surpass when digging
Dig.
5. the new ground of underground pipe gallery according to claim 1 and the different subsidence control method of old road basis, its feature exists
In：In the 6th described step, the mattress layer that the basement process course filled out is cement stabilizing aggregate chips is changed, its top has reinforcing bar to mix
Solidifying soil padding simultaneously extends to Larsen steel sheet pile side, and the horizontal stiffness for forming steel sheet pile bottom is supported.
6. the new ground of underground pipe gallery according to claim 1 and the different subsidence control method of old road basis, its feature exists
In：In the 8th described step, earthing backfill need to meet following requirement：Backfill construction reaches 95% design in piping lane concrete strength
Can carry out during intensity；The backfill material of earthing backfill is using medium coarse sand or clay；Piping lane both sides must symmetrically backfill；Banket
Compaction in layers is required, is adopted in the above 500mm altitude range of pipe top and is manually pounded or light-duty machinery compacting, pipe top above 0.5m～
1m scopes are constructed using light-duty static(al) formula rolling compaction machine；Backfill soil compaction meets specification and design requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611187093.9A CN106592608A (en) | 2016-12-21 | 2016-12-21 | Differential settlement control method for new foundation and old roadbed of utility tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611187093.9A CN106592608A (en) | 2016-12-21 | 2016-12-21 | Differential settlement control method for new foundation and old roadbed of utility tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106592608A true CN106592608A (en) | 2017-04-26 |
Family
ID=58600492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611187093.9A Pending CN106592608A (en) | 2016-12-21 | 2016-12-21 | Differential settlement control method for new foundation and old roadbed of utility tunnel |
Country Status (1)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107630459A (en) * | 2017-09-12 | 2018-01-26 | 上海建工集团股份有限公司 | A kind of soft base of pipe gallery supports and its construction method |
| CN107794942A (en) * | 2017-10-30 | 2018-03-13 | 中国冶集团有限公司 | Riverbed comprehensive pipe gallery structure and its construction method are worn under one kind |
| CN108035204A (en) * | 2017-11-28 | 2018-05-15 | 中国建筑第八工程局有限公司 | Solve the structures and methods of urban road underground pipe gallery intersection differential settlement quality problems |
| CN110158649A (en) * | 2019-06-05 | 2019-08-23 | 浙江交工集团股份有限公司 | The construction method of Adjacent Underground Pipeline when a kind of caisson sinking construction |
| CN113718560A (en) * | 2021-09-30 | 2021-11-30 | 中铁二局集团有限公司 | Intelligent monitoring-based construction method for coordinative settlement control of adjacent existing line retaining wall type high-speed railway foundation |
| CN115495826A (en) * | 2022-10-13 | 2022-12-20 | 西安理工大学 | Active guide type ground crack disaster reduction method based on partition wall |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107630459A (en) * | 2017-09-12 | 2018-01-26 | 上海建工集团股份有限公司 | A kind of soft base of pipe gallery supports and its construction method |
| CN107794942A (en) * | 2017-10-30 | 2018-03-13 | 中国冶集团有限公司 | Riverbed comprehensive pipe gallery structure and its construction method are worn under one kind |
| CN108035204A (en) * | 2017-11-28 | 2018-05-15 | 中国建筑第八工程局有限公司 | Solve the structures and methods of urban road underground pipe gallery intersection differential settlement quality problems |
| CN108035204B (en) * | 2017-11-28 | 2020-06-09 | 中国建筑第八工程局有限公司 | Structure and method for solving problem of uneven settlement quality of junction of urban road underground pipe gallery |
| CN110158649A (en) * | 2019-06-05 | 2019-08-23 | 浙江交工集团股份有限公司 | The construction method of Adjacent Underground Pipeline when a kind of caisson sinking construction |
| CN113718560A (en) * | 2021-09-30 | 2021-11-30 | 中铁二局集团有限公司 | Intelligent monitoring-based construction method for coordinative settlement control of adjacent existing line retaining wall type high-speed railway foundation |
| CN113718560B (en) * | 2021-09-30 | 2022-12-27 | 中铁二局集团有限公司 | Intelligent monitoring-based construction method for coordinative settlement control of adjacent existing line retaining wall type high-speed railway foundation |
| CN115495826A (en) * | 2022-10-13 | 2022-12-20 | 西安理工大学 | Active guide type ground crack disaster reduction method based on partition wall |
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Application publication date: 20170426 |