JP2011017234A - Loading test method for building foundation - Google Patents

Loading test method for building foundation Download PDF

Info

Publication number
JP2011017234A
JP2011017234A JP2009164246A JP2009164246A JP2011017234A JP 2011017234 A JP2011017234 A JP 2011017234A JP 2009164246 A JP2009164246 A JP 2009164246A JP 2009164246 A JP2009164246 A JP 2009164246A JP 2011017234 A JP2011017234 A JP 2011017234A
Authority
JP
Japan
Prior art keywords
ground
loading
foundation
pile
building
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
JP2009164246A
Other languages
Japanese (ja)
Inventor
Takeshi Yamada
毅 山田
Tomio Tsuchiya
富男 土屋
Junji Hamada
純次 濱田
Satoshi Omoto
聡 尾本
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.)
Takenaka Komuten Co Ltd
Original Assignee
Takenaka Komuten Co Ltd
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 Takenaka Komuten Co Ltd filed Critical Takenaka Komuten Co Ltd
Priority to JP2009164246A priority Critical patent/JP2011017234A/en
Publication of JP2011017234A publication Critical patent/JP2011017234A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a loading test method for a building foundation having a pile, a ground improving body and a spread foundation.SOLUTION: This loading test method for the building foundation includes: a first step of providing a foundation concrete slab 26 on the pile 22 constructed in the ground, the ground improving body 24 improving the ground 12, and the ground 12; and a second step of measuring the settlement amount and loaded weight of the foundation concrete slab 26 by adding the loaded weight to the foundation concrete slab 26.

Description

本発明は、建物基礎の載荷試験方法に関する。   The present invention relates to a building foundation loading test method.

特許文献１には、杭と、直接基礎とを併用したパイルド・ラフト基礎の載荷試験方法が開示されている。この特許文献１に記載の例では、地盤にパイルド・ラフト基礎に見立てたパイルド・ラフト試験体を構築し、このパイルド・ラフト試験体に載荷荷重を付加してパイルド・ラフト試験体の支持力を測定している。   Patent Document 1 discloses a loading test method for a piled raft foundation using a pile and a direct foundation in combination. In the example described in Patent Document 1, a piled raft specimen is constructed on the ground as a piled raft foundation, and a loading load is applied to the piled raft specimen to increase the bearing capacity of the piled raft specimen. Measuring.

特開２００６−５７３８０号公報JP 2006-57380 A

しかしながら、杭と直接基礎に加えて、これらと地盤改良体とを併用した建物基礎についての載荷試験方法は見聞されない。   However, in addition to piles and direct foundations, loading test methods for building foundations using these and ground improvement bodies in combination are not heard.

そこで、本発明は、杭と、地盤改良体と、直接基礎とを有する建物基礎の支持力を実測することができる方法を提供することを目的とする。   Then, an object of this invention is to provide the method of measuring the bearing capacity of the building foundation which has a pile, a ground improvement body, and a direct foundation.

前記課題を解決するために、請求項１に記載の建物基礎の載荷試験方法は、地中に構築された杭、地盤を改良した地盤改良体、及び、地盤の上に、載荷版を設ける第一工程と、前記載荷版に載荷荷重を付加して前記載荷版の沈下量と載荷荷重を測定する第二工程と、を備えている。   In order to solve the above-mentioned problem, a loading test method for a building foundation according to claim 1 includes a pile constructed in the ground, a ground improvement body obtained by improving the ground, and a loading plate provided on the ground. A first step and a second step of measuring a settlement amount and a loaded load of the loading plate by adding a loading load to the loading plate.

この載荷試験方法によれば、地中に構築された杭、地盤を改良した地盤改良体、及び、地盤の上に載荷版を設けて、これらからなる建物基礎試験体を建物基礎に見立てて原位置の地盤に構築し、この建物基礎試験体について実際に載荷試験を行う。このため、この原位置において建物基礎の支持力を実測することができる。   According to this loading test method, a pile built in the ground, a ground improvement body improved from the ground, and a loading version are provided on the ground, and the building foundation test body made up of these is regarded as a building foundation. It is constructed on the ground at the location, and this building foundation test specimen is actually subjected to a loading test. For this reason, the bearing capacity of the building foundation can be actually measured at this original position.

また、前記課題を解決するために、請求項２に記載の建物基礎の載荷試験方法は、地中に構築された杭、地盤を改良した地盤改良体、及び、地盤の上に構築された構造物基礎の一部を一定の大きさに切断して載荷版とする第一工程と、前記載荷版に載荷荷重を付加して前記載荷版の沈下量と載荷荷重を測定する第二工程と、を備えている。   Moreover, in order to solve the said subject, the loading test method of the building foundation of Claim 2 is the structure constructed | assembled on the ground constructed | assembled in the ground, the pile improved in the ground, the ground improvement body which improved the ground A first step of cutting a part of the object foundation into a fixed size to form a loading plate, a second step of measuring the settlement amount and the loading load of the loading plate by adding a loading load to the loading plate described above, It has.

この載荷試験方法によれば、地中に構築された杭、地盤を改良した地盤改良体、及び、地盤の上に構築された構造物基礎の一部を一定の大きさに切断して載荷版とし、これらからなる建物基礎試験体について建物基礎に見立てて原位置の地盤において実際に載荷試験を行う。このため、この原位置において建物基礎の支持力を実測することができる。   According to this loading test method, a pile that is built in the ground, a ground improvement body that improves the ground, and a part of a structure foundation that is built on the ground is cut into a certain size, and the loading plate The building foundation test specimens composed of these are actually subjected to a loading test on the ground in the original position as if it were a building foundation. For this reason, the bearing capacity of the building foundation can be actually measured at this original position.

請求項３に記載の建物基礎の載荷試験方法は、請求項１又は請求項２に記載の建物基礎の載荷試験方法における前記第一工程において、前記載荷版と地盤との間に第一土圧計を設置すると共に、前記載荷版と前記地盤改良体との間に第二土圧計を設置し、且つ、前記杭に軸力計を設置し、前記第二工程において、前記軸力計、前記第一土圧計、前記第二土圧計の各出力データに基づいて、前記杭、前記地盤改良体、及び、前記載荷版の支持力の分担率を測定する方法である。   The building foundation loading test method according to claim 3 is the first earth pressure gauge between the loading plate and the ground in the first step of the building foundation loading test method according to claim 1 or claim 2. And a second earth pressure gauge is installed between the packing plate and the ground improvement body, and an axial force meter is installed on the pile. In the second step, the axial force meter, the first It is a method for measuring the share of the supporting force of the pile, the ground improvement body, and the above-described loading plate based on output data of the first earth pressure gauge and the second earth pressure gauge.

この載荷試験方法によれば、杭、地盤改良体、及び、載荷版の支持力の分担率を測定することにより、この原位置の地盤における杭と、地盤改良体と、直接基礎との間の所謂相互作用を把握することができる。   According to this loading test method, by measuring the share of bearing capacity of the pile, ground improvement body, and loading plate, the pile, ground improvement body, and direct foundation between the ground in this original position A so-called interaction can be grasped.

以上説明したように、本発明によれば、原位置において建物基礎の支持力を実測することができる。また、この原位置の地盤における杭と、地盤改良体と、直接基礎との間の所謂相互作用を把握することができる。   As described above, according to the present invention, the supporting force of the building foundation can be actually measured at the original position. Further, it is possible to grasp the so-called interaction between the pile on the ground in the original position, the ground improvement body, and the direct foundation.

本発明の第一実施形態に係る建物基礎の載荷試験方法における第二工程の実施前の状態を示す正面図である。It is a front view which shows the state before implementation of the 2nd process in the loading test method of the building foundation which concerns on 1st embodiment of this invention. 本発明の第一実施形態に係る建物基礎の載荷試験方法における第二工程の実施中の状態を示す正面図である。It is a front view which shows the state in implementation of the 2nd process in the loading test method of the building foundation which concerns on 1st embodiment of this invention. 図１に示される建物基礎試験体の平面図である。It is a top view of the building foundation test body shown by FIG. 本発明の第一実施形態に係る載荷試験方法における建物基礎試験体の変形例を示す平面図である。It is a top view which shows the modification of the building foundation test body in the loading test method which concerns on 1st embodiment of this invention. 本発明の第一実施形態に係る載荷試験方法における建物基礎試験体の変形例を示す平面図である。It is a top view which shows the modification of the building foundation test body in the loading test method which concerns on 1st embodiment of this invention. 本発明の第二実施形態に係る建物基礎の載荷試験方法における第二工程の実施前の状態を示す正面図である。It is a front view which shows the state before implementation of the 2nd process in the loading test method of the building foundation which concerns on 2nd embodiment of this invention.

［第一実施形態］
はじめに、本発明の第一実施形態に係る建物基礎の載荷試験方法について説明する。 [First embodiment]
First, the building foundation loading test method according to the first embodiment of the present invention will be described.

［第一工程］
先ず、図１，図３に示されるように、建物を新築する原位置の地盤１２に、建物基礎に見立てた建物基礎試験体２０を構築する。 [First step]
First, as shown in FIG. 1 and FIG. 3, a building foundation test body 20 that is assumed to be a building foundation is constructed on the ground 12 at the original position where the building is newly constructed.

すなわち、地盤１２に杭２２を構築すると共に、この杭２２の周囲の地盤に地盤改良杭を連続して構築することにより平面視にて枠状の地盤改良体２４を地中に造成する。   That is, while constructing the pile 22 on the ground 12 and continuously constructing the ground improvement pile on the ground around the pile 22, the frame-shaped ground improvement body 24 is created in the ground in plan view.

そして、地盤１２上に複数の第一土圧計２８を設置すると共に、地盤改良体２４上に複数の第二土圧計３０を設置する。また、杭２２の頭部に例えば歪ゲージ等により構成された軸力計３２を設置する。   Then, a plurality of first earth pressure gauges 28 are installed on the ground 12, and a plurality of second earth pressure gauges 30 are installed on the ground improvement body 24. Moreover, the axial force meter 32 comprised by the strain gauge etc. is installed in the head of the pile 22, for example.

次いで、この杭２２及び地盤改良体２４の上方の地表に載荷版としての基礎コンクリート版２６を形成して、建物基礎試験体２０を構築する。   Next, a foundation concrete plate 26 as a loading plate is formed on the ground surface above the pile 22 and the ground improvement body 24 to construct the building foundation test body 20.

なお、この場合に、杭２２の頭部と基礎コンクリート版２６とを縁切りしても良く、構造的に一体化しても良い。同様に、地盤改良体２４の上部と基礎コンクリート版２６とを縁切りしても良く、構造的に一体化しても良い。   In this case, the head of the pile 22 and the foundation concrete plate 26 may be cut off or may be structurally integrated. Similarly, the upper part of the ground improvement body 24 and the foundation concrete plate 26 may be cut off and may be structurally integrated.

また、建物基礎試験体２０を構築した後、この載荷試験方法を実施するための試験装置４０を構築する。つまり、下台座４６を基礎コンクリート版２６の上に配置し、複数のジャッキ４８をこの下台座４６の上に縦横にマトリックス状に並べた状態で設置する。また、各反力杭４２を地盤１２に構築すると共に、上台座４４を複数のジャッキ４８の上に配置し、この上台座４４と複数の反力杭４２の頭部とを超張力鋼４５により結合する。   Moreover, after constructing the building foundation test body 20, the test apparatus 40 for implementing this loading test method is constructed. That is, the lower pedestal 46 is disposed on the foundation concrete plate 26, and a plurality of jacks 48 are installed on the lower pedestal 46 in a matrix form vertically and horizontally. Further, each reaction force pile 42 is constructed on the ground 12, and the upper base 44 is disposed on a plurality of jacks 48, and the upper base 44 and the heads of the plurality of reaction force piles 42 are made of super tensile steel 45. Join.

さらに、建物基礎試験体２０から十分に離れた位置の地盤に図示しない不動杭をそれぞれ構築し、この一対の不動杭の頭部に不動梁５２を水平にした状態で結合する。また、この不動梁５２と基礎コンクリート版２６との間に変位計５４をそれぞれ設置する。   Furthermore, a non-illustrated non-illustrated pile is constructed on the ground sufficiently away from the building foundation test body 20, and the fixed beam 52 is coupled in a horizontal state to the heads of the pair of non-movable piles. Displacement meters 54 are installed between the fixed beam 52 and the foundation concrete plate 26, respectively.

［第二工程］
続いて、建物基礎試験体２０の支持力を測定する。すなわち、複数のジャッキ４８を作動（伸長）させ、上台座４４に反力をとって基礎コンクリート版２６に載荷荷重を付加する。 [Second step]
Subsequently, the supporting force of the building foundation test body 20 is measured. That is, the plurality of jacks 48 are actuated (extended), and a reaction force is applied to the upper base 44 to apply a loading load to the foundation concrete plate 26.

そして、このときに変位計５４を用いて基礎コンクリート版２６の沈下量を測定すると共に、例えばジャッキ４８に設けられた荷重計等を用いて基礎コンクリート版２６に付加した載荷荷重を測定する。また、さらに、このときに複数の第一土圧計２８及び第二土圧計３０と、軸力計３２からの出力データに基づいて、杭２２と、地盤改良体２４と、基礎コンクリート版２６の各支持力の分担率を算出する。   At this time, the amount of settlement of the foundation concrete plate 26 is measured using the displacement meter 54, and the load applied to the foundation concrete plate 26 is measured using a load meter or the like provided on the jack 48, for example. Further, at this time, based on the output data from the plurality of first earth pressure gauges 28 and second earth pressure gauges 30 and the axial force gauge 32, each of the pile 22, the ground improvement body 24, and the foundation concrete plate 26. Calculate the share of support capacity.

なお、この載荷試験では、基礎コンクリート版２６に載荷荷重を付加することにより、最終的に、基礎コンクリート版２６を例えばその幅（１辺の長さ）の１／１０程度まで沈下させる。   In this loading test, by applying a loading load to the foundation concrete slab 26, the foundation concrete slab 26 is finally lowered to, for example, about 1/10 of its width (length of one side).

つまり、例えば、基礎コンクリート版２６の１辺の長さが４ｍである場合には、基礎コンクリート版２６を元の位置から４０ｃｍ沈下させる。そして、このときの各出力データを測定する。   That is, for example, when the length of one side of the foundation concrete plate 26 is 4 m, the foundation concrete plate 26 is lowered by 40 cm from the original position. And each output data at this time is measured.

また、基礎コンクリート版２６が元の位置から４０ｃｍ沈下するまでの間に複数のジャッキ４８が伸び切り状態となった場合には、この複数のジャッキ４８と上台座４４との間にプレートを入れ、この複数のジャッキ４８の盛替えを行う。   In addition, when the plurality of jacks 48 are fully extended until the foundation concrete plate 26 sinks 40 cm from the original position, a plate is put between the plurality of jacks 48 and the upper pedestal 44, The multiple jacks 48 are refilled.

この載荷試験方法によれば、既存の建物を建て替える原位置の地盤１２に建物基礎に見立てた建物基礎試験体２０を構築し、この建物基礎試験体２０について実際に載荷試験を行う。このため、この原位置において建物基礎の支持力を実測することができる。   According to this loading test method, the building foundation test body 20 that is regarded as the building foundation is constructed on the ground 12 at the original position where an existing building is to be rebuilt, and the building foundation testing body 20 is actually subjected to a loading test. For this reason, the bearing capacity of the building foundation can be actually measured at this original position.

また、杭２２、地盤改良体２４、及び、基礎コンクリート版２６の支持力の分担率を測定することにより、この原位置の地盤１２における杭と、地盤改良体と、直接基礎との間の所謂相互作用を把握することができる。   Moreover, by measuring the share of the bearing capacity of the pile 22, the ground improvement body 24, and the foundation concrete plate 26, the so-called between the pile, the ground improvement body, and the direct foundation in the ground 12 in this original position. It is possible to grasp the interaction.

従って、この試験によって得られたデータを利用して建物基礎の設計を行えば、この建物基礎について無駄の無い経済的な設計を行うことができる。   Therefore, if the building foundation is designed using the data obtained by this test, an economical design without waste can be performed on the building foundation.

なお、この載荷試験方法では、図３に示されるように、基礎コンクリート版２６と、この基礎コンクリート版２６の中心部に構築された杭２２と、この杭２２の周囲を囲う平面視枠状に構成された地盤改良体２４とを有する建物基礎試験体２０を構築し、これを試験対象としていたが、その他にも、種々の形態の建物基礎試験体を構築し、これを試験対象とすることが可能である。   In this loading test method, as shown in FIG. 3, the foundation concrete plate 26, the pile 22 constructed at the center of the foundation concrete plate 26, and a frame shape in a plan view surrounding the periphery of the pile 22. The building foundation test body 20 having the constructed ground improvement body 24 was constructed and used as a test object. In addition, various types of building foundation test bodies were constructed and used as test objects. Is possible.

例えば、図４に示されるように、基礎コンクリート版６６と、この基礎コンクリート版６６の四隅に構築された複数の杭６２と、基礎コンクリート版６６の中心部にて交差する十字状に構成された地盤改良体６４とを有する建物基礎試験体６０を構築し、これを試験対象としても良い。   For example, as shown in FIG. 4, the foundation concrete plate 66, a plurality of piles 62 constructed at the four corners of the foundation concrete plate 66, and a cross shape intersecting at the center of the foundation concrete plate 66 are configured. A building foundation test body 60 having the ground improvement body 64 may be constructed and used as a test object.

また、図５に示されるように、基礎コンクリート版７６と、格子状に構成された地盤改良体７４と、この地盤改良体７４の隙間に構築された複数の杭７２とを有する建物基礎試験体７０を構築し、これを試験対象としても良い。   Further, as shown in FIG. 5, a building foundation test body having a foundation concrete plate 76, a ground improvement body 74 configured in a lattice shape, and a plurality of piles 72 constructed in a gap between the ground improvement bodies 74. 70 may be constructed and used as a test target.

また、この載荷試験方法では、基礎コンクリート版２６の代わりに、剛板等を用いても良い。   In this loading test method, a rigid plate or the like may be used instead of the foundation concrete plate 26.

また、この載荷試験方法では、ジャッキ４８を用いて建物基礎試験体２０に載荷荷重を加えていたが、その他の方式により建物基礎試験体２０に載荷荷重を加えても良い。   In this loading test method, the loading load is applied to the building foundation test body 20 using the jack 48. However, the loading load may be applied to the building foundation testing body 20 by other methods.

［第二実施形態］
次に、本発明の第二実施形態に係る建物基礎の載荷試験方法について説明する。 [Second Embodiment]
Next, the building foundation loading test method according to the second embodiment of the present invention will be described.

上述の本発明の第一実施形態に係る載荷試験方法は、建物を新築する際に原位置の地盤に新たに建物基礎試験体を構築し、これを試験対象として実施されていたが、本発明の第二実施形態に係る載荷試験方法は、既存の建物を建て替える際にこの建物の建物基礎を利用して建物基礎試験体を構築し、これを試験対象として実施するものである。以下、これを説明する。   In the loading test method according to the first embodiment of the present invention described above, when a building was newly constructed, a building foundation test body was newly constructed on the ground in the original position, and this was performed as a test target. The loading test method according to the second embodiment constructs a building foundation test body using the building foundation of this building when rebuilding an existing building, and implements it as a test object. This will be described below.

なお、図６に示されるように、建て替え対象となる建物８０の建物基礎８４は、地盤８２に構築された複数の杭９２と、地中に地盤改良を施して造成された地盤改良体９４と、杭９２及び地盤改良体９４の上方の地表に形成された構造物基礎（直接基礎）９５とを有している。   As shown in FIG. 6, the building foundation 84 of the building 80 to be reconstructed includes a plurality of piles 92 constructed on the ground 82, and a ground improvement body 94 created by performing ground improvement in the ground. And a structure foundation (direct foundation) 95 formed on the ground surface above the pile 92 and the ground improvement body 94.

［第一工程］
先ず、構造物基礎９５のうち杭９２及び地盤改良体９４の周辺部を一定の大きさに切断して載荷版としての基礎コンクリート版９６を形成すると共に、杭９２の直上に位置する建物８０の柱８６の下端部を所定の高さに切除して、杭９２と、地盤改良体９４と、基礎コンクリート版９６とを有する建物基礎試験体９０を構築する。 [First step]
First, the periphery of the pile 92 and the ground improvement body 94 in the structure foundation 95 is cut to a certain size to form a foundation concrete plate 96 as a loading plate, and the building 80 located immediately above the pile 92 A building foundation test body 90 having a pile 92, a ground improvement body 94, and a foundation concrete plate 96 is constructed by cutting off the lower end portion of the column 86 to a predetermined height.

そして、柱８６の下端部と基礎コンクリート版９６との間にジャッキ４８を設置する。また、建物基礎試験体９０を構築する適宜段階において、基礎コンクリート版９６と地盤８２との間に複数の第一土圧計２８を設置すると共に、基礎コンクリート版９６と地盤改良体９４との間に複数の第二土圧計３０を設置する。さらに、杭９２の頭部に軸力計３２を設置する。   Then, the jack 48 is installed between the lower end portion of the column 86 and the foundation concrete plate 96. In addition, at an appropriate stage of constructing the building foundation test body 90, a plurality of first earth pressure gauges 28 are installed between the foundation concrete plate 96 and the ground 82, and between the foundation concrete plate 96 and the ground improvement body 94. A plurality of second earth pressure gauges 30 are installed. Further, the axial force meter 32 is installed on the head of the pile 92.

また、建物基礎試験体９０から十分に離れた位置の地盤に図示しない不動杭をそれぞれ構築し、この一対の不動杭の頭部に不動梁５２を水平にした状態で結合する。また、この不動梁５２と基礎コンクリート版９６との間に変位計５４をそれぞれ設置する。   Further, immovable piles (not shown) are respectively constructed on the ground sufficiently away from the building foundation test body 90, and the immovable beams 52 are joined to the heads of the pair of immovable piles in a horizontal state. Displacement meters 54 are installed between the fixed beam 52 and the foundation concrete plate 96, respectively.

［第二工程］
続いて、ジャッキ４８を作動（伸長）させ、柱８６に反力をとって基礎コンクリート版９６に載荷荷重を付加する。 [Second step]
Subsequently, the jack 48 is actuated (extended), and a reaction force is applied to the column 86 to apply a loading load to the foundation concrete plate 96.

そして、このときに変位計５４に基づいて基礎コンクリート版９６の沈下量を測定すると共に、例えばジャッキ４８に設けられた荷重計等に基づいて基礎コンクリート版９６に付加した載荷荷重を測定する。また、さらに、このときに複数の第一土圧計２８及び第二土圧計３０と、軸力計３２からの出力データに基づいて、杭９２と、地盤改良体９４と、基礎コンクリート版９６の各支持力の分担率を算出する。   At this time, the amount of subsidence of the foundation concrete plate 96 is measured based on the displacement meter 54, and the load applied to the foundation concrete plate 96 is measured based on, for example, a load meter provided on the jack 48. Further, at this time, based on the output data from the plurality of first earth pressure gauges 28 and second earth pressure gauges 30 and the axial force gauge 32, each of the pile 92, the ground improvement body 94, and the foundation concrete plate 96. Calculate the share of support capacity.

この載荷試験方法によれば、既存の建物８０を建て替える原位置の地盤８２に建物基礎に見立てた建物基礎試験体９０を建物基礎８４を利用して構築し、この建物基礎試験体９０について実際に載荷試験を行う。このため、この原位置において建物基礎の支持力を実測することができる。   According to this loading test method, a building foundation test body 90 that is regarded as a building foundation is built on the ground 82 in the original position where the existing building 80 is rebuilt, using the building foundation 84, and the building foundation testing specimen 90 is actually used. Perform loading test. For this reason, the bearing capacity of the building foundation can be actually measured at this original position.

また、杭９２、地盤改良体９４、及び、基礎コンクリート版９６の支持力の分担率を測定することにより、この原位置の地盤８２における杭と、地盤改良体と、直接基礎との間の所謂相互作用を把握することができる。   Further, by measuring the share of the bearing capacity of the pile 92, the ground improvement body 94, and the foundation concrete plate 96, the so-called between the pile on the ground 82 in the original position, the ground improvement body, and the direct foundation. It is possible to grasp the interaction.

従って、この試験によって得られたデータを利用して建物基礎の設計を行えば、この建物基礎について無駄の無い経済的な設計を行うことができる。   Therefore, if the building foundation is designed using the data obtained by this test, an economical design without waste can be performed on the building foundation.

以上、本発明の一実施形態について説明したが、本発明は、上記に限定されるものでなく、上記以外にも、その主旨を逸脱しない範囲内において種々変形して実施可能であることは勿論である。   Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and other various modifications can be made without departing from the spirit of the present invention. It is.

２０，６０，７０，９０ 建物基礎試験体
２２，６２，７２，９２ 杭
２４，６４，７４，９４ 地盤改良体
２６，６６，７６，９６ 基礎コンクリート版
２８ 第一土圧計
３０ 第二土圧計
３２ 軸力計 20, 60, 70, 90 Building foundation test body 22, 62, 72, 92 Pile 24, 64, 74, 94 Ground improvement body 26, 66, 76, 96 Foundation concrete plate 28 First earth pressure gauge 30 Second earth pressure gauge 32 Axial force meter

Claims (3)

地中に構築された杭、地盤を改良した地盤改良体、及び、地盤の上に、載荷版を設ける第一工程と、
前記載荷版に載荷荷重を付加して前記載荷版の沈下量と載荷荷重を測定する第二工程と、
を備えた建物基礎の載荷試験方法。 A first step of providing a loading plate on a pile constructed in the ground, a ground improvement body improved from the ground, and the ground;
A second step of adding a loading load to the previously described packing plate and measuring a settlement amount and a loading load of the loading plate described above;
Loading test method for building foundations equipped with 地中に構築された杭、地盤を改良した地盤改良体、及び、地盤の上に構築された構造物基礎の一部を一定の大きさに切断して載荷版とする第一工程と、
前記載荷版に載荷荷重を付加して前記載荷版の沈下量と載荷荷重を測定する第二工程と、
を備えた建物基礎の載荷試験方法。 A first step of making a loading plate by cutting a part of a structure foundation built on the ground, a ground improvement body improved on the ground, and a structure foundation built on the ground into a fixed size;
A second step of adding a loading load to the previously described packing plate and measuring a settlement amount and a loading load of the loading plate described above;
Loading test method for building foundations equipped with 前記第一工程において、前記載荷版と地盤との間に第一土圧計を設置すると共に、前記載荷版と前記地盤改良体との間に第二土圧計を設置し、且つ、前記杭に軸力計を設置し、
前記第二工程において、前記軸力計、前記第一土圧計、前記第二土圧計の各出力データに基づいて、前記杭、前記地盤改良体、及び、前記載荷版の支持力の分担率を測定する、
請求項１又は請求項２に記載の建物基礎の載荷試験方法。 In the first step, a first earth pressure gauge is installed between the loading plate and the ground described above, a second earth pressure gauge is installed between the loading plate and the ground improvement body, and a shaft is attached to the pile. Install a dynamometer
In the second step, based on the output data of the axial force meter, the first earth pressure gauge, and the second earth pressure gauge, the share ratio of the supporting force of the pile, the ground improvement body, and the loading plate described above is determined. taking measurement,
The building foundation loading test method according to claim 1 or 2.
JP2009164246A 2009-07-10 2009-07-10 Loading test method for building foundation Pending JP2011017234A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009164246A JP2011017234A (en) 2009-07-10 2009-07-10 Loading test method for building foundation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009164246A JP2011017234A (en) 2009-07-10 2009-07-10 Loading test method for building foundation

Publications (1)

Publication Number Publication Date
JP2011017234A true JP2011017234A (en) 2011-01-27

Family

ID=43595202

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009164246A Pending JP2011017234A (en) 2009-07-10 2009-07-10 Loading test method for building foundation

Country Status (1)

Country Link
JP (1) JP2011017234A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102966126A (en) * 2012-11-27 2013-03-13 中国电力科学研究院 Up-pull static load test method for power transmission line tower foundation
CN103015391A (en) * 2013-01-07 2013-04-03 天津大学 Online evaluation method for compaction quality of earth and rockfill dam material
CN104213548A (en) * 2014-09-17 2014-12-17 甘肃省电力设计院 Simple measurement method of ground foundation fracture surface of power transmission tower foundation
CN109235510A (en) * 2018-10-18 2019-01-18 中国地质大学（武汉） A kind of test device and method measuring Pile Soil 3-D displacement field

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0913359A (en) * 1995-06-28 1997-01-14 Taisei Corp Ground-supporting force reinforcing method by steel pipe
JP2002138487A (en) * 2000-11-06 2002-05-14 Shimizu Corp Bearing structure for building structure
JP2006057380A (en) * 2004-08-23 2006-03-02 Takenaka Komuten Co Ltd Load testing method for piled raft foundation
JP2006077447A (en) * 2004-09-09 2006-03-23 Taisei Corp Foundation structure of construction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0913359A (en) * 1995-06-28 1997-01-14 Taisei Corp Ground-supporting force reinforcing method by steel pipe
JP2002138487A (en) * 2000-11-06 2002-05-14 Shimizu Corp Bearing structure for building structure
JP2006057380A (en) * 2004-08-23 2006-03-02 Takenaka Komuten Co Ltd Load testing method for piled raft foundation
JP2006077447A (en) * 2004-09-09 2006-03-23 Taisei Corp Foundation structure of construction

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JPN6013025639; 社団法人日本建築学会: 建築基礎構造設計指針 第２版第４刷, 20040810, Ｐ．３４２, 社団法人日本建築学会 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102966126A (en) * 2012-11-27 2013-03-13 中国电力科学研究院 Up-pull static load test method for power transmission line tower foundation
CN102966126B (en) * 2012-11-27 2015-09-02 国家电网公司 Up-pull static load test method for power transmission line tower foundation
CN103015391A (en) * 2013-01-07 2013-04-03 天津大学 Online evaluation method for compaction quality of earth and rockfill dam material
CN104213548A (en) * 2014-09-17 2014-12-17 甘肃省电力设计院 Simple measurement method of ground foundation fracture surface of power transmission tower foundation
CN109235510A (en) * 2018-10-18 2019-01-18 中国地质大学（武汉） A kind of test device and method measuring Pile Soil 3-D displacement field

Similar Documents

Publication Publication Date Title
Elwakil et al. Experimental and numerical study of piled raft system
JP4098218B2 (en) Rock shear test method and rock shear test equipment
JP2014088689A (en) Loading test method and loading test device for composite reinforcement ground
Negro et al. Full-scale PSD testing of a torsionally unbalanced three-storey non-seismic RC frame
JP2012255305A (en) Foundation load testing method
KR101166139B1 (en) Apparatus and method for horizontal load test of strip foundation
CN105887946B (en) A kind of laboratory testing rig of Model Pile Combined load
CN106013270A (en) Combined load loading device for pile foundation in field testing
KR20100031167A (en) Apparatus for pile load test
JP2011133261A (en) Horizontal load testing method of pile
CN211816467U (en) Bored concrete pile anchor piles combination method static load pile-pressing test device
CN108020460A (en) A kind of coefficient of collapsibility of loess measuring apparatus and its measuring method
JP2011017234A (en) Loading test method for building foundation
CN205662958U (en) Concrete spread foundation test device
JP4378244B2 (en) Loading test method for piled raft foundation
CN102995669A (en) Large-tonnage foundation pile uplift-resistant static test connection device, loading counter-force system and method
Jin et al. Effect of cross-section size on flexural compressive failure of RC columns: Monotonic and cyclic tests
CN210376011U (en) Large-area on-site direct shear test equipment
Yang et al. Effect of soil-pile-structure interaction on seismic behaviour of nuclear power station via shaking table tests
CN105300811A (en) Large-size soil circular shear testing machine
CN108535113B (en) Comprehensive determination method for deformation parameters of horizontal stratified rock mass
JP5383358B2 (en) Building foundation loading test method
GB2418026A (en) Method of load testing a pile
JP2011102527A (en) Horizontal load testing method of pile
Reddy et al. Experimental study of a modeled building frame supported by pile groups embedded in cohesionless soil

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20120627

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20130523

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20130528

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20131008