GB2605291A - Method for retaining and protection of foundation excavations under geological condition of soil layer containing stones - Google Patents
Method for retaining and protection of foundation excavations under geological condition of soil layer containing stones Download PDFInfo
- Publication number
- GB2605291A GB2605291A GB2207292.0A GB202207292A GB2605291A GB 2605291 A GB2605291 A GB 2605291A GB 202207292 A GB202207292 A GB 202207292A GB 2605291 A GB2605291 A GB 2605291A
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- GB
- United Kingdom
- Prior art keywords
- retaining
- protection
- stone
- soil layer
- stones
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- 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.)
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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
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- Engineering & Computer Science (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)
- Structural Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Earth Drilling (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
A method for retaining and protection of foundation excavations under the geological condition of a soil layer containing stones, the method comprising: S1, conducting geological exploration, and determining the position of stones on an excavating path of a foundation excavation; S2, measuring and positioning the boundary of the foundation excavation; S3, a drilling machine handling the stones along a foundation excavation retaining and protection boundary, wherein after the drilling machine firstly drills a plurality of large holes in a soil layer above the stones, protective tubes are inserted into the plurality of large holes respectively, then the drilling machine passes through the protective tubes to drill small holes in the stones, and next, a hydraulic splitting machine is inserted into the small holes, such that the hydraulic splitting machine is used to split the stones to form splits; and S4, performing surface earthwork excavating, installing steel purlins, and driving steel sheet piles. A retaining and protection structure comprises a plurality of insertion plates and connecting plates, wherein clamping slots corresponding to the insertion plates are provided on two sides of each connecting plate. The present invention is used for solving the problem of it not being possible for existing retaining and protection of foundation excavations under the geological condition of a soil layer containing stones to penetrate stones, and a plurality of working faces can be in operation at the same time, thereby shortening a construction period. Moreover, no pollution is caused to the environment.
Description
Description
METHOD FOR RETAINING AND PROTECTION OF FOUNDATION EXCAVATIONS UNDER GEOLOGICAL CONDITION OF SOIL LAYER CONTAINING STONES
Technical Field
[0001] The present invention relates to a method for retaining and protection of a foundation excavation under a geological condition of a stone-contained soil layer.
Background Art
[0002] During construction of a new foundation excavation, different types of retaining and protection structures of foundation excavation are widely used, comprising I-beam pile retaining and protection, Larsen steel sheet pile retaining and protection, cement mixing retaining and protection, and other modes. Under a geological condition of a soil layer containing many big stones, all pile heads of the I-beam pile, the Larsen pile and the cement mixing pile cannot pass through the stones, and all these retaining and protection structures cannot be directly applied, so that the stones can only be blasted or broken, and after overexcavation and replacement, the retaining and protection piles are driven, and then reverse slotting construction is performed, thus not only leading to a sharp increase in engineering investment and a prolonged construction period, but also easily leading to safety accidents and influences on surrounding roads or houses.
Summary of the Invention
[0003] The technical problem to be solved by the present invention is to provide a method for retaining and protection of a foundation excavation under a geological condition of a stone-contained soil layer, which is used for solving a problem of incapability of passing through a stone in existing retaining and protection of the foundation excavation under the geological condition of the stone-contained soil layer, so that the stone can only be blasted or broken, and after overexcavation and replacement, retaining and protection piles are driven, and then reverse slotting construction is performed, thus leading to a sharp increase in engineering investment, a prolonged construction period, and influences on surrounding roads or houses.
[0004] In order to solve the above problem, the technical solution to be solved by the present invention is as follows.
A method for retaining and protection of a foundation excavation under a geological condition of a stone-contained soil layer comprises the following steps of: Si, performing geological exploration to determine a position of a stone on an excavating path of a foundation excavation
Description
52, measuring and positioning a boundary of the foundation excavation, 53, processing, by a drilling machine, the stone along a retaining and protection boundary of the foundation excavation; and 54, after arranging a retaining and protection structure in a drilled hole, excavating a surface earthwork, mounting a steel purlin, and driving a steel sheet pile [0005] When performing step S3 above, the drilled hole is required to pass through the stone.
[0006] The retaining and protection structure comprises a protective tube, the protective tube passes through the drilled hole, an 1-beam is arranged in the protective tube, and a cement slurry is filled between the 1-beam and the protective tube.
[0007] When performing step S3 above, the drilling machine drills a plurality of large holes in a soil layer above the stone, and then the protective tube is inserted into the large holes respectively, then the drilling machine passes through the protective tube to drill small holes in the stone, and then a hydraulic splitting machine is inserted into the small holes, and the hydraulic splitting machine is used to split the stone to form a split.
[0008] The retaining and protection structure comprises a plurality of inserting plates and a plurality of connecting plates, two sides of the connecting plates are provided with clamping grooves corresponding to the inserting plates, after the hydraulic splitting machine splits the stone to form the split, a pile driver inserts each inserting plate into the split between two adjacent protective tubes first, then the hydraulic splitting machine and the protective tubes are removed, and the connecting plate is inserted into a gap between the inserting plates [0009] The present invention has the beneficial effects as follows.
I. Low project cost and short construction period. By adopting the method for retaining and protection of the foundation excavation, the project cost is reduced by at least 40% compared with an overexcavation, replacement and reverse slotting technology, a plurality of working faces may be operated simultaneously, thus shortening a construction period, and meanwhile, no environmental pollution is caused.
[0010] 2. Small occupied area, strong adaptability to surrounding terrain and high safety. The present invention is basically not limited by surrounding terrain and buildings, and has a high safety by excavation after finishing the retaining and protection of the foundation excavation, without influencing surrounding roads and buildings.
[0011] 3. The retaining and protection structure may be pulled out to realize recycling, thus improving a utilization rate of resources, and consumption of disposable materials is minimized. [0012] 4. A spacing of the retaining and protection structure may be calculated and
Description
adjusted according to a depth of the foundation excavation, thus having a strong adaptability.
Brief Description of the Drawings
[0013] The present invention is further described hereinafter with reference to the drawings: Fig. 1 is a schematic structural diagram of a top view of Embodiment 1 Fig. 2 is a schematic stnictural diagram of a front view of Embodiment 1; Fig. 3 is a schematic structural diagram of a top view of Embodiment 2; Fig. 4 is a schematic structural diagram of a front view of a local cross-section of Embodiment 2; Fig. 5 is a schematic structural diagram of a local cross-section of Embodiment 2; and Fig. 6 is a schematic structural diagram of a top view of a local cross-section of Embodiment 2.
[0014] In the drawings: 1 refers to steel sheet pile, 2 refers to protective tube, 3 refers to I-beam, 4 refers to steel purlin, 5 refers to stone, 6 refers to connecting plate, 7 refers to inserting plate, and 8 refers to hydraulic splitting machine.
Detailed Description of the Preferred Embodiments
[0015] A method for retaining and protection of a foundation excavation under a geological condition of a stone-contained soil layer comprises the following steps of: Sl, performing geological exploration to determine a position of a stone 5 on an excavating path of a foundation excavation; S2, measuring and positioning a boundary of the foundation excavation; S3, processing, by a drilling machine, the stone 5 along a retaining and protection boundary of the foundation excavation; and S4, after arranging a retaining and protection structure in a drilled hole, excavating a surface earthwork, mounting a steel purlin 4, and driving a steel sheet pile 1.
[0016] Two retaining and protection structures are further described hereinafter.
Embodiment I: When a thickness of a stone 5 is less than 1m, a retaining and protection structure composed of a PE protective tube 2 and an 1-beam 3 may be used. During implementation, as shown in Fig. 1 and Fig. 2, a drilling machine drills through the stone 5, then lubricating oil is smeared on an inner wall of the protective tube 2, the protective tube 2 is inserted into a drilled hole, the I-beam 3 is downwardly placed in the drilled hole, and a cement slurry is filled between the I-beam 3 and the protective tube 2. After the cement slurry is solidified, an earthwork or a stonework about 50cm above a surface of a soil layer is excavated, a steel purlin
Description
4 is mounted, and a steel sheet pile 1 is driven. After finishing the foundation excavation, the PE protective tube 2 and the I-beam 3 are pulled out by a pile driver for reuse.
[0017] Embodiment 2: When a thickness of a stone 5 is more than lm, it is difficult for a drilling machine to drill through the stone 5, and then a retaining and protection stmcture composed of a plurality of inserting plates 7, a plurality of connecting plates 6, and steel protective tubes 2 may be used. During implementation, as shown in Fig. 5 and Fig. 6, a drilling machine drills a large hole in a soil layer above the stone 5, and then the steel protective tube 2 is inserted into the large hole, then the drilling machine drills a small hole in the stone 5, and then a hydraulic splitting machine 8 is inserted into the small hole. The hydraulic splitting machine 8 is used to split the stone 5 to form a split with a width of 2cm to 3cm. A pile driver inserts each inserting plate 7 into the split between two adjacent protective tubes 2 first, then the hydraulic splitting machine 8 and the protective tubes 2 are removed, and the connecting plate 6 is inserted into a gap between the inserting plates 7. Two sides of the inserting plates 7 are required to be in clamping grooves of the connecting plates 6, and the inserting plates 7 are clamped and fixed by the stone and the soil layer, and then the pile driver drives a steel sheet pile 1 and mounts a steel purlin 4, so as to finish mounting of retaining and protection around the foundation excavation.
Claims (4)
- Claims 1 A method for retaining and protection of a foundation excavation under a geological condition of a stone-contained soil layer, comprising the following steps of SI, performing geological exploration to determine a position of a stone (5) on an excavating path of a foundation excavation; S2, measuring and positioning a boundary of the foundation excavation; S3, processing, by a drilling machine, the stone (5) along a retaining and protection boundary of the foundation excavation; and S4, after arranging a retaining and protection structure in a drilled hole, excavating a surface earthwork, mounting a steel purlin (4), and driving a steel sheet pile (1).
- 2. The method for retaining and protection of the foundation excavation under the geological condition of the stone-contained soil layer according to claim I, wherein when performing step S3 above, the drilled hole is required to pass through the stone (5)
- 3 The method for retaining and protection of the foundation excavation under the geological condition of the stone-contained soil layer according to claim 2, wherein the retaining and protection structure comprises a protective tube (2), the protective tube (2) passes through the drilled hole, an I-beam (3) is arranged in the protective tube (2), and a cement slurry is filled between the 1-beam (3) and the protective tube (2)
- 4. The method for retaining and protection of the foundation excavation under the geological condition of the stone-contained soil layer according to claim I, wherein when performing step S3 above, the drilling machine drills a plurality of large holes in a soil layer above the stone (5), and then the protective tube (2) is inserted into the large holes respectively, then the drilling machine passes through the protective tube (2) to drill small holes in the stone (5), and then a hydraulic splitting machine (8) is inserted into the small holes, and the hydraulic splitting machine (8) is used to split the stone (5) to form a split S. The method for retaining and protection of the foundation excavation under the geological condition of the stone-contained soil layer according to claim 4, wherein the retaining and protection structure comprises a plurality of inserting plates (7) and a plurality of connecting plates (6), two sides of the connecting plates (6) are provided with clamping grooves corresponding to the inserting plates (7), after the hydraulic splitting machine (8) splits the stone (5) to form the split, a pile driver inserts each inserting plate (7) into the split between two adjacent protective tubes (2) first, then the hydraulic splitting machine (8) and the protective tubes (2) are removed, and the connecting plate (6) is inserted into a gap between the inserting plates (7).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011311018.5A CN112442991B (en) | 2020-11-20 | 2020-11-20 | Method for supporting foundation pit under condition of stone block included in soil layer |
| PCT/CN2021/113859 WO2022017541A1 (en) | 2020-11-20 | 2021-08-20 | Method for retaining and protection of foundation excavations under geological condition of soil layer containing stones |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB202207292D0 GB202207292D0 (en) | 2022-06-29 |
| GB2605291A true GB2605291A (en) | 2022-09-28 |
| GB2605291B GB2605291B (en) | 2023-03-29 |
Family
ID=74737115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2207292.0A Active GB2605291B (en) | 2020-11-20 | 2021-08-20 | Method for retaining and protection of foundation excavations under geological condition of soil layer containing stones |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP7381747B2 (en) |
| CN (1) | CN112442991B (en) |
| DE (1) | DE112021000151B4 (en) |
| GB (1) | GB2605291B (en) |
| WO (1) | WO2022017541A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112442991B (en) * | 2020-11-20 | 2021-09-07 | 中国长江三峡集团有限公司 | Method for supporting foundation pit under condition of stone block included in soil layer |
| CN114837088A (en) * | 2022-04-27 | 2022-08-02 | 中国建筑第七工程局有限公司 | Construction method of bearing platform on highway |
| CN115369888A (en) * | 2022-08-31 | 2022-11-22 | 中交一公局集团有限公司 | Deep water bare rock foundation pit forming method |
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| CN112442991A (en) * | 2020-11-20 | 2021-03-05 | 中国长江三峡集团有限公司 | Method for supporting foundation pit under condition of stone block included in soil layer |
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| JPS52155817A (en) * | 1976-06-21 | 1977-12-24 | Aichi Kinzoku Kougiyou Kk | Execution method *equpment for driving sheet piles and crossbeam connecting tools for pit excavation for steel tower |
| DD150400A3 (en) | 1979-03-27 | 1981-09-02 | Peter Stoll | METHOD FOR PRODUCING A PROFILE STEEL RAMMPFAFAES |
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2020
- 2020-11-20 CN CN202011311018.5A patent/CN112442991B/en active Active
-
2021
- 2021-08-20 DE DE112021000151.5T patent/DE112021000151B4/en active Active
- 2021-08-20 JP JP2022528579A patent/JP7381747B2/en active Active
- 2021-08-20 WO PCT/CN2021/113859 patent/WO2022017541A1/en active Application Filing
- 2021-08-20 GB GB2207292.0A patent/GB2605291B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08253930A (en) * | 1995-03-17 | 1996-10-01 | Fujita Corp | Reinforcing method for middle pile in inverted construction method |
| JPH09158197A (en) * | 1995-12-12 | 1997-06-17 | Kajima Corp | Rock mass excavation method in pneumatic caisson method |
| CN101985836A (en) * | 2010-09-10 | 2011-03-16 | 广东省基础工程公司 | Processing method of pile-wall type deep base pit supporting structure in case of encountering large boulder stone |
| CN109989405A (en) * | 2017-12-30 | 2019-07-09 | 广州协安建设工程有限公司 | Base pit stand construction under boulder site condition |
| CN110424434A (en) * | 2019-07-26 | 2019-11-08 | 中冶集团武汉勘察研究院有限公司 | For filling out the stirring pile water stopping curtain and construction method in the deep area Kuai Shi in sea |
| CN112442991A (en) * | 2020-11-20 | 2021-03-05 | 中国长江三峡集团有限公司 | Method for supporting foundation pit under condition of stone block included in soil layer |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022017541A1 (en) | 2022-01-27 |
| CN112442991B (en) | 2021-09-07 |
| JP7381747B2 (en) | 2023-11-15 |
| DE112021000151T5 (en) | 2022-08-18 |
| GB202207292D0 (en) | 2022-06-29 |
| CN112442991A (en) | 2021-03-05 |
| JP2023501743A (en) | 2023-01-18 |
| DE112021000151B4 (en) | 2024-06-13 |
| GB2605291B (en) | 2023-03-29 |
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