CN110670631A - Supporting structure and excavation method of comprehensive pipe gallery foundation pit - Google Patents
Supporting structure and excavation method of comprehensive pipe gallery foundation pit Download PDFInfo
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- CN110670631A CN110670631A CN201910984290.0A CN201910984290A CN110670631A CN 110670631 A CN110670631 A CN 110670631A CN 201910984290 A CN201910984290 A CN 201910984290A CN 110670631 A CN110670631 A CN 110670631A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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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
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- 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
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- 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
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
- E02D5/187—Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints
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- 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
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- Mining & Mineral Resources (AREA)
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Abstract
The utility model provides a utility tunnel foundation pit's supporting construction and excavation method, this supporting construction is applied to the utility tunnel foundation pit of striding municipal pipeline section on, the both sides limit of utility tunnel foundation pit all includes adjacent first level and puts the slope with the second level, and this first slope of putting is connected with the ground surface, supporting construction includes the bottom plate that is located the foundation pit bottom, is located the back up coat of bottom plate lower extreme, and squeeze into four soil nails of slope inside are put to the second, adopt the slip casting to consolidate. According to the invention, a supporting form of slope relief and soil nails is adopted in the upper span section due to the influence of the sewage pipeline below, and the bottom of the foundation pit of the upper span section is reinforced by grouting, so that the structural strength of the periphery of the comprehensive pipe gallery foundation pit of the upper span municipal pipeline section is ensured. Through the design of this supporting construction, can guarantee to go up the construction security of striding section utility tunnel foundation ditch, holistic work progress is easily controlled, and construction quality is better.
Description
Technical Field
The invention relates to the technical field of civil construction, in particular to a supporting structure and an excavating method of a comprehensive pipe gallery foundation pit.
Background
Along with the rapid promotion of Chinese urbanization and the gradual transformation of urban functions, the construction of underground comprehensive pipe galleries has become a new power for improving the urban comprehensive bearing capacity, improving the urban ecological environment and promoting the urban economic development. The urban comprehensive pipe gallery project occupies an important position and plays an important role in the process of promoting novel urbanization and urban modernization.
Because the underground comprehensive pipe galleries are usually positioned in the center of a city and have long length and large span, the underground comprehensive pipe galleries are inevitably subjected to the conditions of approaching municipal pipelines and passing through the existing buildings and roads in the process of construction. The engineering accidents that the underground pipeline excessively deforms and is damaged due to excavation of the pipe gallery foundation pit occur at times, and not only can huge economic loss be brought to the engineering accidents, but also great negative effects can be generated on the society. And the engineering difficulty of excavating the comprehensive pipe gallery foundation pit over the municipal pipeline is higher, the danger is higher, and the municipal pipeline can be damaged carelessly.
Therefore, the safe and reliable design method is provided for excavation of the comprehensive pipe gallery foundation pit which spans the municipal pipeline.
Disclosure of Invention
The invention aims to provide a supporting structure and an excavating method of a comprehensive pipe gallery foundation pit for ensuring the stability of the foundation pit aiming at excavating the comprehensive pipe gallery foundation pit with a large-diameter pipeline spanning the foundation pit
The utility model provides a supporting construction of utility tunnel foundation ditch, is applied to the utility tunnel foundation ditch of going up stride municipal pipeline section, the both sides limit of utility tunnel foundation ditch all includes that adjacent first level puts slope and second level puts the slope, and this first slope of putting is connected with the ground surface, supporting construction is including the bottom plate that is located the foundation ditch bottom, be located the back up coat of bottom plate lower extreme, and squeeze into the slope inside four soil nails is put to the second, adopt the slip casting to consolidate.
Further, utility tunnel foundation pit's supporting construction, wherein, this foundation pit excavation degree of depth is 5mm, and the pit bottom is from municipal pipeline portion 1 m.
Further, utility tunnel foundation pit's supporting construction, wherein, the slope of slope is 1 to first level: 1.25, the gradient of the second grade slope is 1: 0.3.
further, the supporting construction of utility tunnel foundation ditch, wherein, the first grade is put the slope and is sprayed the C20 concrete mask that thickness is 100mm on the domatic, and establishes the HRB335 reinforcing bar net that diameter 8mm, interval 200 x 200mm in the inside.
Further, utility tunnel foundation pit's supporting construction, wherein, the diameter of four soil nails is 120mm, and the interval is got 1.0m, and the inclination is got 10, and four soil nails are along the direction of depth from last to soil nail length down 8m, 10m and 6m in proper order.
Further, utility tunnel foundation pit's supporting construction, wherein, slope and the second level are put to the first order and are provided with the width and be 1.5m hierarchical excessive platform between the slope.
The embodiment of the invention also provides an excavation method of the comprehensive pipe rack foundation pit, which comprises the following steps:
detecting whether municipal pipelines are distributed below a first foundation pit before excavation;
if so, constructing a pit bottom grouting reinforcing layer;
excavating to a position 30cm below the first soil nail, driving the first soil nail, and constructing a concrete surface and a reinforcing mesh;
respectively driving a second soil nail, a third soil nail and a fourth soil nail according to the method for driving the first soil nail, and constructing a concrete surface and a reinforcing mesh;
after the first foundation pit is excavated to the designed elevation, a plain concrete cushion layer is poured to seal the foundation pit
Constructing a main body structure of the comprehensive pipe gallery;
and backfilling the first foundation pit after the main structure concrete reaches the design strength.
Further, the excavation method of the comprehensive pipe gallery foundation pit comprises the following steps of:
constructing a waterproof curtain, wherein a row of waterproof curtains are respectively arranged on two sides of a currently excavated second foundation pit, and the waterproof curtain adopts a triaxial cement mixing pile;
constructing a fender pile, wherein the fender pile is arranged on one side, away from the second foundation pit, of the waterproof curtain, and a cast-in-situ bored pile is adopted as the fender pile;
the two reinforcing bodies are positioned at the bottom of the second foundation pit and are reinforced by adopting a three-axis stirring pile;
excavating to the bottom of a crown beam and a support beam, and constructing a reinforced concrete crown beam and a first reinforced concrete support beam, wherein the support beam is connected to the upper ends of two opposite guard piles, and the crown beam is used for fixing the support beam and the guard piles;
after the top beam and the supporting beam reach the design strength, excavating to the bottom of the second foundation pit in a layered and sectional manner, and after the second foundation pit is excavated to the design elevation, pouring a plain concrete cushion layer to seal the foundation pit;
constructing a waterproof layer, and pouring a bottom plate, wherein the bottom plate is positioned above the two reinforcing bodies;
constructing a main body structure of the comprehensive pipe gallery;
and backfilling to the bottom of the reinforced concrete support beam after the main structure of the comprehensive pipe gallery reaches the design strength, and removing the crown beam and the support beam.
Further, according to the excavation method of the comprehensive pipe rack foundation pit, drainage ditches are respectively arranged on two sides of the second foundation pit.
Further, the excavation method of the comprehensive pipe gallery foundation pit is characterized in that the two sides of the second foundation pit are respectively provided with a slope value of 1:1 is released.
Drawings
FIG. 1 is a schematic cross-sectional view of a non-upper-span pit;
FIG. 2 is a schematic cross-sectional view of an upper-span pit;
fig. 3 is a sectional view of the current sewer pipe for grouting reinforcement.
Description of the main elements
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, this embodiment is provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiment of the invention provides a design method suitable for a large-diameter pipeline spanning a foundation pit, which has the following design idea:
(1) performing pile-supported enclosure design on the non-upper span foundation pit;
(2) determining the pit bottom lifting height of the upper span section of the foundation pit, wherein the bottom of the foundation pit is a certain distance away from the top of the sewage pipeline, so that the sewage pipeline is prevented from being damaged due to construction in the excavation process of the foundation pit;
(3) and (5) carrying out support design on the upper span section foundation pit.
The corresponding upper span foundation pit has simple surrounding environment and no important influence on the building around, and the foundation pit with enough construction site can be used for slope-releasing excavation. If the conditions allow, grading slope relief can be carried out.
Referring to fig. 1, the supporting device for a utility tunnel foundation pit according to the first embodiment of the present invention is applied to a non-upper-span utility tunnel foundation pit, the depth of the foundation pit is 7m, and drainage ditches 7 are respectively disposed on the ground at two sides of the foundation pit, so as to facilitate the drainage of excess muddy water during the construction process. The drainage ditch 7 is a brick drainage ditch with the size of 300 × 300 m. As shown in fig. 1, the present embodiment is provided with a support system, the pile top is provided with a small release slope 1 with a slope of 1:1, and the support is arranged 1m below the ground surface. The supporting device comprises two reinforcing bodies 4 and a bottom plate 8 which are arranged at the bottom of a foundation pit, and a row of waterproof curtains 3 which are respectively arranged on two sides of the foundation pit. One side of the two rows of waterproof curtains 4 far away from the foundation pit is provided with one row of fender piles 2 respectively, the upper ends of the two opposite fender piles 2 are connected through a supporting beam 6, and the supporting beam 6 is fixed with the fender piles 2 through crown beams.
The two reinforcing bodies 4 are respectively arranged on two sides of the bottom of the foundation pit and are reinforced by adopting a three-axis stirring pile. The bottom plate 8 is arranged at the upper end of the two reinforcing bodies 4, and the utility tunnel is arranged at the lower end of the bottom plate 9. The waterproof curtain 3 adopts a triaxial cement mixing pile, the diameter of the waterproof curtain pile 3 is 650mm, the distance between the waterproof curtain piles is 450mm, and the waterproof layer entering the bottom of the waterproof curtain is not less than 1.5 m. The fender pile 2 adopts a cast-in-situ bored pile, the diameter of the pile is 800mm, the distance is 10m, the length is 18mm, and the concrete adopted by the fender pile is C30.
The lower ends of the fender post 2 and the waterproof curtain 3 are fixed under the ground at the lower end of the reinforcing body. And the waterproof curtain 3 extends downwards for a length longer than that of the fender post 2.
The crown beam 5 is made of reinforced concrete crown beams with the size of 1000 mm-800 mm, the support beam 6 is made of reinforced concrete supports with the size of 800-800 mm, and the horizontal spacing of the supports is 8 m. The crown beam and the support beam are made of C30 concrete.
The supporting device in this embodiment is applied to the non-upper span comprehensive pipe gallery foundation pit, and it adopts a safer stake-supporting type supporting system, namely, the foundation pit is supported by the waterproof curtain, the enclosure piles, the reinforcing body, the bottom plate and the supporting beam. Fully guarantee utility tunnel outlying structural strength, holistic work progress is easily controlled, and the potential safety hazard is few, construction quality is better.
When carrying out utility tunnel foundation ditch excavation, detect whether the foundation ditch below distributes and have municipal pipeline, when not distributing municipal pipeline, adopt the strutting arrangement of first embodiment. Based on the non-upper span section comprehensive pipe gallery foundation pit in the embodiment, the embodiment of the invention also provides an excavation method of the comprehensive pipe gallery foundation pit, which comprises the following steps:
step S11, when no municipal pipeline is distributed below the foundation pit, constructing a waterproof curtain 3 which adopts a triaxial cement mixing pile;
step S12, constructing a fender post 2, wherein the fender post 2 adopts a cast-in-situ bored pile;
step S13, constructing a pit bottom reinforcement body 4, wherein the reinforcement body 4 is reinforced by adopting a three-axis stirring pile;
step S14, excavating to the bottom positions of the crown beam 5 and the support beam 6, and constructing a reinforced concrete crown beam and a first reinforced concrete support beam;
step S15, after the crown beam 5 and the support beam 6 reach the design strength, excavating to the bottom of the foundation pit in a layered and segmented manner, and after the foundation pit is excavated to the design elevation, pouring a plain concrete cushion layer to seal the foundation pit;
step S16, constructing a waterproof layer and pouring a bottom plate 8;
step S17, constructing the main body structure 9 of the comprehensive pipe gallery;
and step S18, backfilling to the bottom of the reinforced concrete support beam after the main structure 9 of the comprehensive pipe gallery reaches the design strength, and removing the crown beam 5 and the support beam 6.
Referring to fig. 2, in a third embodiment of the present invention, a supporting structure of a utility tunnel foundation pit is further provided, the supporting structure is used for supporting the utility tunnel foundation pit which spans a municipal pipeline section upwards, and the embodiment specifically takes the utility tunnel foundation pit which spans a sewage line as an example for description. The excavation depth of the foundation pit is 5mm, the distance between the pit bottom and the top of the sewage pipe is 1m, and the diameter of the sewage pipe is 2.4 m. Two side edges of the foundation pit comprise a first-level slope 11 and a second-level slope 12 which are adjacent, and the width of a graded transition platform of the first-level slope 11 and the second-level slope 12 is 1.5 m.
This first grade is put slope 11 and is close to ground, and its slope is 1: 1.25, the gradient of the second grade relief slope 12 is 1: 0.3. the first grade of slope 11 sprays C20 concrete face with thickness of 100mm on the slope surface, and is internally provided with HRB335 reinforcing mesh with diameter of 8mm and spacing of 200 x 200 mm.
This supporting construction is including the bottom plate 8 that is located the foundation ditch bottom, the anchor coat 15 that is located this bottom plate 8 lower extreme to and squeeze into the inside four soil nails 13 of second bank of slopes, first soil nail, second soil nail, third soil nail and fourth soil nail promptly.
This back up coat 15 adopts the slip casting to consolidate, and the sewage pipeline is avoided to the injected hole, need pay attention to control slip casting pressure during the slip casting, ensures sewage pipe safe operation. The distance between the grouting holes is 400mm x 400mm, and the reinforcing depth is 7m below the bottom of the foundation pit. The grouting material is cement-water glass double-liquid slurry. The cement is 42.5-grade ordinary portland cement, the concentration of water glass is 35 degrees Be (35 degrees Baume), the modulus is 2.8, the concentration of cement slurry is 0.8-1.25, the volume ratio of the cement slurry to the water glass is 1: 0.6-1: 1, the diffusion radius is more than or equal to 300mm, and the final pressure of grouting is 0.4-0.6 MPa.
Be equipped with steel floral tube 14 in this back up coat and support, the steel floral rod all adopts HPB300 reinforcing bar, and diameter 48mm wall thickness 3.5mm, length 7 m.
The size and parameters of the upper span foundation pit soil nail are calculated by checking the tensile bearing capacity of the soil nail and the overall stability of the soil nail wall. Specifically, the diameter of the four soil nails in the embodiment is 120mm, the distance is 1.0m, the inclination angle is 10 degrees, the arrangement form that the middle is long and the middle is short is adopted in the depth direction, and the lengths of the soil nails are 8m, 10m and 6m from top to bottom in sequence.
The first to fourth soil nails 13 adopt a mode of forming holes firstly and then inserting soil nails, and the soil nail rod pieces all adopt HRB5000 steel bars, are horizontally arranged at intervals of 1.0m and vertically arranged at intervals of 1.0m in a quincunx manner. The soil nail wall surface adopts a wet spraying method to spray concrete and is constructed in two layers. And after the first layer of concrete is sprayed to the thickness of 40mm, burying soil nails, binding reinforcing meshes, and then spraying the concrete to the designed thickness. The soil nail grouting adopts cement paste, the water cement ratio is 0.5mm, and the strength is not lower than 20 MPa.
In the embodiment, the upper span section adopts a supporting mode of slope relief and soil nailing due to the influence of the sewage pipeline below, and the bottom of the upper span section foundation pit is reinforced by grouting, so that the structural strength of the periphery of the comprehensive pipe gallery foundation pit of the upper span municipal pipeline section is ensured. Through the design of this supporting construction, can guarantee to go up the construction security of striding section utility tunnel foundation ditch, holistic work progress is easily controlled, and construction quality is better.
Further, for the upper span comprehensive pipe gallery foundation pit in the third embodiment, the excavation method includes the steps of:
step S21, grouting a reinforcing layer 15 at the bottom of the construction pit;
step S22, excavating and constructing to a position 30cm below the first soil nail, driving the first soil nail, and constructing a concrete surface and a reinforcing mesh;
step S23, respectively driving a second soil nail, a third soil nail and a fourth soil nail according to the method of the step S22, and constructing a concrete surface and a reinforcing mesh;
step S24, after the foundation pit is excavated to the designed elevation, pouring a plain concrete cushion layer to seal the foundation pit
Step S25, constructing the main body structure 9 of the comprehensive pipe gallery;
and step S26, backfilling the foundation pit after the main structure concrete reaches the design strength.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a supporting construction of utility tunnel foundation ditch, is applied to the utility tunnel foundation ditch of going up stride municipal pipeline section, a serial communication port, the both sides limit of utility tunnel foundation ditch all includes adjacent first level and puts the slope and the slope is put to the second level, and this first slope of putting is connected with the ground surface, supporting construction is including the bottom plate that is located the foundation ditch bottom, be located the back up coat of bottom plate lower extreme, and squeeze into the inside four soil nails of slope is put to the second, adopt the slip casting to consolidate.
2. The support structure of the utility tunnel foundation pit according to claim 1, wherein the excavation depth of the foundation pit is 5mm, and the pit bottom is 1m from the municipal pipeline part.
3. The utility tunnel foundation pit supporting structure of claim 1, wherein the slope of the first grade is 1: 1.25, the gradient of the second grade slope is 1: 0.3.
4. the support structure of the utility tunnel foundation pit according to claim 1, wherein the first grade of slope is sprayed with a C20 concrete facing with a thickness of 100mm on the slope surface and is internally provided with HRB335 reinforcing meshes with a diameter of 8mm and a spacing of 200 x 200 mm.
5. The support structure of the utility tunnel foundation pit according to claim 1, wherein the four soil nails are 120mm in diameter, 1.0m in pitch and 10 ° in inclination, and have lengths of 8m, 10m and 6m from top to bottom in the depth direction.
6. The support structure of utility tunnel foundation pit according to claim 1, characterized in that a graded transition platform with a width of 1.5m is arranged between the first grade slope and the second grade slope.
7. The excavation method of the comprehensive pipe gallery foundation pit is characterized by comprising the following steps:
detecting whether municipal pipelines are distributed below a first foundation pit before excavation;
if so, constructing a pit bottom grouting reinforcing layer;
excavating to a position 30cm below the first soil nail, driving the first soil nail, and constructing a concrete surface and a reinforcing mesh;
respectively driving a second soil nail, a third soil nail and a fourth soil nail according to the method for driving the first soil nail, and constructing a concrete surface and a reinforcing mesh;
after the first foundation pit is excavated to the designed elevation, a plain concrete cushion layer is poured to seal the foundation pit
Constructing a main body structure of the comprehensive pipe gallery;
and backfilling the first foundation pit after the main structure concrete reaches the design strength.
8. The excavation method of the utility tunnel foundation pit according to claim 7, wherein when it is detected that there is no municipal pipeline distributed below the foundation pit, the excavation method further comprises the steps of:
constructing a waterproof curtain, wherein a row of waterproof curtains are respectively arranged on two sides of a currently excavated second foundation pit, and the waterproof curtain adopts a triaxial cement mixing pile;
constructing a fender pile, wherein the fender pile is arranged on one side, away from the second foundation pit, of the waterproof curtain, and a cast-in-situ bored pile is adopted as the fender pile;
the two reinforcing bodies are positioned at the bottom of the second foundation pit and are reinforced by adopting a three-axis stirring pile;
excavating to the bottom of a crown beam and a support beam, constructing a reinforced concrete crown beam and a first reinforced concrete support beam, wherein the support beam is connected to the upper ends of two opposite guard piles, and the crown beam is used for fixing the support beam and the guard piles;
after the top beam and the supporting beam reach the design strength, excavating to the bottom of the second foundation pit in a layered and sectional manner, and after the second foundation pit is excavated to the design elevation, pouring a plain concrete cushion layer to seal the foundation pit;
constructing a waterproof layer, and pouring a bottom plate, wherein the bottom plate is positioned above the two reinforcing bodies;
constructing a main body structure of the comprehensive pipe gallery;
and backfilling to the bottom of the reinforced concrete support beam after the main structure of the comprehensive pipe gallery reaches the design strength, and removing the crown beam and the support beam.
9. The method for excavating a foundation pit according to the utility tunnel of claim 8, wherein drainage ditches are respectively provided at both sides of the second foundation pit.
10. The excavation method of the utility tunnel foundation pit as claimed in claim 8, wherein both sides of the second foundation pit are respectively provided with a slope value of 1:1 is released.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106979A (en) * | 2021-04-13 | 2021-07-13 | 中铁十四局集团有限公司 | Excavation method of upper cover foundation pit and construction method of upper cover added layer |
| CN113737670A (en) * | 2021-09-18 | 2021-12-03 | 杭州交投建设工程有限公司 | Deformation control structure of pipe culvert and construction method |
| CN114319164A (en) * | 2021-12-21 | 2022-04-12 | 广州市市政工程设计研究总院有限公司 | Open-cut tunnel upper-span existing culvert structure and construction method thereof |
| CN114960617A (en) * | 2022-05-21 | 2022-08-30 | 浙江华云电力工程设计咨询有限公司 | Tunnel foundation pit bottom dislocation hidden pier reinforcement system and reinforcement method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107574836A (en) * | 2017-08-22 | 2018-01-12 | 杭州伟业建设集团有限公司 | Cross the constructing structure and construction method of urban road underpass |
| JP2018091107A (en) * | 2016-12-07 | 2018-06-14 | 鹿島建設株式会社 | Method for constructing underground structure |
| CN209163805U (en) * | 2018-08-14 | 2019-07-26 | 中铁二十局集团第一工程有限公司 | A kind of big cross section rectangular top pipe construction active well foundation reinforcing structure |
| CN110284497A (en) * | 2019-06-25 | 2019-09-27 | 东南大学 | A kind of control soft soil foundation pit underlies the foundation reinforcement method of existing tunnel malformation |
-
2019
- 2019-10-16 CN CN201910984290.0A patent/CN110670631A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018091107A (en) * | 2016-12-07 | 2018-06-14 | 鹿島建設株式会社 | Method for constructing underground structure |
| CN107574836A (en) * | 2017-08-22 | 2018-01-12 | 杭州伟业建设集团有限公司 | Cross the constructing structure and construction method of urban road underpass |
| CN209163805U (en) * | 2018-08-14 | 2019-07-26 | 中铁二十局集团第一工程有限公司 | A kind of big cross section rectangular top pipe construction active well foundation reinforcing structure |
| CN110284497A (en) * | 2019-06-25 | 2019-09-27 | 东南大学 | A kind of control soft soil foundation pit underlies the foundation reinforcement method of existing tunnel malformation |
Non-Patent Citations (2)
| Title |
|---|
| 刘文刚: "排桩+内支撑在综合管廊深基坑支护中的应用", 《绿色环保建材》 * |
| 王东生等: "《岩溶高原湖盆区城市快速路施工新技术—哨关路工程施工实践》", 30 April 2018, 西南交通大学出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106979A (en) * | 2021-04-13 | 2021-07-13 | 中铁十四局集团有限公司 | Excavation method of upper cover foundation pit and construction method of upper cover added layer |
| CN113106979B (en) * | 2021-04-13 | 2023-08-04 | 中铁十四局集团有限公司 | Excavation method of upper cover foundation pit and construction method for upper cover storey addition |
| CN113737670A (en) * | 2021-09-18 | 2021-12-03 | 杭州交投建设工程有限公司 | Deformation control structure of pipe culvert and construction method |
| CN114319164A (en) * | 2021-12-21 | 2022-04-12 | 广州市市政工程设计研究总院有限公司 | Open-cut tunnel upper-span existing culvert structure and construction method thereof |
| CN114960617A (en) * | 2022-05-21 | 2022-08-30 | 浙江华云电力工程设计咨询有限公司 | Tunnel foundation pit bottom dislocation hidden pier reinforcement system and reinforcement method thereof |
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Application publication date: 20200110 |