CN101003973A - Method for treating quasi-prepressing groundwork of artificial island - Google Patents

Method for treating quasi-prepressing groundwork of artificial island Download PDF

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Publication number
CN101003973A
CN101003973A CN 200710010044 CN200710010044A CN101003973A CN 101003973 A CN101003973 A CN 101003973A CN 200710010044 CN200710010044 CN 200710010044 CN 200710010044 A CN200710010044 A CN 200710010044A CN 101003973 A CN101003973 A CN 101003973A
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CN
China
Prior art keywords
island
quasi
treating
weak
island body
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
Application number
CN 200710010044
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Chinese (zh)
Inventor
赵欣
李旭志
刘天宇
王丹
齐昌东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liaohe Petroleum Exploration Bureau
Original Assignee
Liaohe Petroleum Exploration Bureau
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Liaohe Petroleum Exploration Bureau filed Critical Liaohe Petroleum Exploration Bureau
Priority to CN 200710010044 priority Critical patent/CN101003973A/en
Publication of CN101003973A publication Critical patent/CN101003973A/en
Pending legal-status Critical Current

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Abstract

The present invention relates to a tidal zone and shallow water area petroleum sandstone artificial island construction method, in particular, it is a kind of artificial island quasi-precompression foundation treatment method. Said method includes the following steps: firstly, filling inshore weak clay layer surface with island body block stones to make the inshore weak clay layer surface be reached to artificial island construction and design standard before winter stoppage period and form foundation treatment heaped layer; then utilizing the packed island self-weight to increase effective stress of lower portion weak clay layer under sea-water so as to raise load-bearing capacity of foundation; after the sea is opened, continuously filling said weak clay layer with sandstone and mountain slope earth and rolling until the weak clay layer is reached to designed standard; finally, making upper portion building of island body.

Description

A kind of method for treating quasi-prepressing groundwork of artificial island
Technical field:
The present invention relates to sea, beach oil sandstone man-made island job practices, especially a kind of method for treating quasi-prepressing groundwork of artificial island.
Background technology:
Along with oil field prospecting development shallow sea field area enters the development phase, because mud oil equipment in neritic area must be located on the man-made island, and the technology that forms man-made island at present can not reach satisfaction, and the method that is fit to sea, beach Soft Ground in the existing technology mainly contains casing pipe hole forming and irritates post method and preloading.The casing pipe hole forming bored concrete pile method duration is short, but expense is relatively costly.Preloading is divided into two kinds of piling prepressing and vacuum preloadings from job practices, and the vacuum method effect better but expense is higher; And the preloading expense is low, and the construction period is longer.Preloading is in order to quicken soil solidifying and setting of ground speed, be everlasting and insert plastic draining board in the ground or squeeze into sand drain as effective vertical drainage approach, can shorten drainage distance, can make the soil body reach the higher degree of consolidation in the short time relatively, improve bearing capacity of foundation soil, but the expense of plastic draining board and sand drain is all very high.The artificial island of the present invention quasi-prepressing method for processing foundation for this reason can realize setting up the foundation requirement of man-made island, and this method easy construction is simple and direct, can save a large amount of construction investments again, is not reported through looking into relevant document.
Summary of the invention:
The object of the invention is in order to overcome above-mentioned shortcoming, and a kind of method for treating quasi-prepressing groundwork of artificial island that provides, the downtime utilizes the island body of preloading itself to continue soft foundation is carried out can reaching the man-made island ground standard of setting up after the precompressed in the winter time.
Technical scheme:
Be the task of realizing that the present invention proposes, during enforcement, at first use island body piece stone, the more weak clay aspect in coastal waters thrown fill out, make it to reach man-made island working design standard before the downtime in the winter time, form ground and handle the preloading layer, rely on the island body own wt of being piled up then, the effective stress of the weak argillic horizon in seawater bottom is increased, impel the island body to finish the precosolidation sedimentation during this period, thereby the raising bearing capacity of foundation soil, wait out the sea after, continue again to rockfill and use mountain skin soil to proceed placement grinding, until reaching design elevation, form the secondary loading layer and end, treat island body sedimentation complete stability at last after, carry out island body top-out again.
The man-made island body piece stone that described ground is handled on the preloading layer is filled to above 3.9 meters of seawater argillic horizon; Opening continues to rockfill behind the sea and add mountain skin soil fills, the secondary loading layer that through pressurizeing after, forms to 5.2 meters height of general arrangement absolute altitude only.
Have ring-type cement dash mud around the described secondary loading layer, retaining soil is filled out end face and is provided with anti-mud wall.
The present invention compared with prior art has distinguishing feature:
The present invention utilizes and builds the island downtime winter and adopt boulder to throw to fill out clay stratum below the sea, utilizing block island body own wt that the weak argillic horizon in bottom is carried out precompressed can dribble the excess pore water pressure of top preloading, then weak argillic horizon effective stress is increased, the island body is finished the precosolidation sedimentation during this period, also improved weak argillic horizon modulus of compressibility, thereby can reduce the posterior settlement of island body, improved bearing capacity of foundation soil, use mountain skin soil to proceed to fill to roll for opening second phase behind the sea, lay the first stone until reaching design elevation, this method can be saved seabeach man-made island precompressed ground in a large number and be handled funds, and carries out adequate preparation for the construction of sea, beach man-made island.
Description of drawings:
Accompanying drawing is a structural representation of the present invention.
Among the figure by 1, ground handles the preloading layer, 2, the secondary loading layer, 3, island body piece stone, 4, the man-made island ground, 5, the seawater interface, 6, retaining wall, 7, argillic horizon, 8, wave wall forms.
The specific embodiment:
The present invention is provided below in conjunction with accompanying drawing by following examples the present invention is described further.
Among the figure, ground is chosen in the downtime of building the island winter when handling, utilize this method to 7 precompressed of seabeach soft clay stratum, and through 3-5 month time, sedimentation can improve foundation capability, is beneficial to the construction of carrying out man-made island the coming year on this basis again.
This method is at first used the weak argillic horizon 7 in sandy beach, 3 pairs of coastal waters of body piece stone, bulk island to throw and is filled out, downtime reaches and forms ground behind the absolute altitude of man-made island working design and handle preloading layer 1 in the winter time, rely on the island body own wt of piling up then, the effective stress of the weak argillic horizon 7 in seawater bottom is increased, impel the island body to finish the precosolidation sedimentation in this phase, discharge moisture content in it, thereby raising foundation capability, wait for the coming year out behind the sea, continue again to rockfill, and use mountain skin soil, proceed placement grinding, after reaching design height and forming secondary loading layer 2 and treat island body sedimentation complete stability, carry out island body top building-up work again.
Embodiment 2:
The island body piece stone 3 that described ground is handled preloading layer 1 top highly be argillic horizon 7 above 3.9 meters in the seawater, opens that rockfill on ground is handled preloading layer 1 in the back, sea and secondary loading layer 2 gross thickness of the native formation of mountain skin that adds are 7 meters.
Embodiment 3:
Around the secondary loading layer 2 ring-type cement retaining wall 6 is arranged, the retaining wall end face has wave wall 8, is used for preventing seawater invasion and security needs.
After construction was correlated with on body basis, above-mentioned island, the Liaohe Oil Field had 8 mouthfuls of oil wells at it above the island, and two layers of life office building and well metering room are produced oil recovery, all succeedd.

Claims (3)

1, a kind of method for treating quasi-prepressing groundwork of artificial island, it is characterized in that: at first use island body piece stone (3), the more weak argillic horizon in coastal waters (7) face thrown fill out, make it to reach man-made island working design standard before the downtime in the winter time, form ground and handle the preloading layer, rely on the island body own wt of being piled up then, the effective stress of the weak argillic horizon in seawater bottom (7) is increased, impel the island body to finish the precosolidation sedimentation during this period, thereby raising bearing capacity of foundation soil, after waiting out the sea, continue again to rockfill and use mountain skin soil to proceed placement grinding,, form secondary loading layer (2) and end until reaching design elevation, after treating island body sedimentation complete stability at last, carry out island body top-out again.
2, method for treating quasi-prepressing groundwork of artificial island according to claim 1 is characterized in that: the man-made island body piece stone (3) that described ground is handled on the preloading layer is filled to above 3.9 meters of seawater argillic horizon (7); Opening continues to rockfill behind the sea and add mountain skin soil fills, and the secondary loading layer 2 of formation is to 5.2 meters height of general arrangement absolute altitude through pressurizeing after.
3, method for treating quasi-prepressing groundwork of artificial island according to claim 1 is characterized in that: described secondary loading layer (2) has ring-type cement retaining wall (6) on every side, and retaining wall is filled out top layer and is provided with wave wall (8).
CN 200710010044 2007-01-10 2007-01-10 Method for treating quasi-prepressing groundwork of artificial island Pending CN101003973A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200710010044 CN101003973A (en) 2007-01-10 2007-01-10 Method for treating quasi-prepressing groundwork of artificial island

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200710010044 CN101003973A (en) 2007-01-10 2007-01-10 Method for treating quasi-prepressing groundwork of artificial island

Publications (1)

Publication Number Publication Date
CN101003973A true CN101003973A (en) 2007-07-25

Family

ID=38703330

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200710010044 Pending CN101003973A (en) 2007-01-10 2007-01-10 Method for treating quasi-prepressing groundwork of artificial island

Country Status (1)

Country Link
CN (1) CN101003973A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101581083B (en) * 2009-06-12 2011-01-19 中交二航局第三工程有限公司 Method for constructing composite river bottom protection with steel sheet piles and soft mattresses for artificial island
CN107059837A (en) * 2016-12-29 2017-08-18 上海建工二建集团有限公司 A kind of concrete balancing weight preloading structure and its construction method
CN111567176A (en) * 2020-05-14 2020-08-25 天津市方正园林建设监理中心 Saline-alkali soil greening improvement method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101581083B (en) * 2009-06-12 2011-01-19 中交二航局第三工程有限公司 Method for constructing composite river bottom protection with steel sheet piles and soft mattresses for artificial island
CN107059837A (en) * 2016-12-29 2017-08-18 上海建工二建集团有限公司 A kind of concrete balancing weight preloading structure and its construction method
CN111567176A (en) * 2020-05-14 2020-08-25 天津市方正园林建设监理中心 Saline-alkali soil greening improvement method

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