JP2010242369A - Ground investigation apparatus - Google Patents

Ground investigation apparatus Download PDF

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JP2010242369A
JP2010242369A JP2009091989A JP2009091989A JP2010242369A JP 2010242369 A JP2010242369 A JP 2010242369A JP 2009091989 A JP2009091989 A JP 2009091989A JP 2009091989 A JP2009091989 A JP 2009091989A JP 2010242369 A JP2010242369 A JP 2010242369A
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ground
drilling
core
drill head
lower frame
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JP5205591B2 (en
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Kojiro Takei
居 幸 次 郎 武
Satoru Okanda
神 田 覚 大
Maho Miyahara
原 万 穂 宮
Jun Shinjo
庄 潤 新
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Kajima Corp
Koken Boring Machine Co Ltd
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Kajima Corp
Koken Boring Machine Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an easy-to-use ground investigation apparatus which enables the sampling of a core (soil sample) with no variation from soft ground to hard ground, in addition to the performance of a cone penetration test and drilling logging (MWD logging) using a drill for drilling a hole. <P>SOLUTION: This ground investigation apparatus with a cone penetration machine and a ground drilling machine includes: an outer pipe; an inner pipe, the lower end of which is connected to a core tube for collecting the ground sample and the upper end of which is extended to a ground side and inserted into the outer pipe; and a drill head for sampling the core, which has a rotary mechanism for rotating the upper portion of the outer pipe by gripping it and a grip mechanism for unrotatably holding the upper portion of the inner pipe by gripping it, and which is attached in such a manner as to be switchable from a drill head for the drilling of the ground drilling machine, to a slide table moving upward and downward along a columnar guide erected on a lower frame. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、建設工事のため施工地盤の諸条件を測定するコーン貫入機、地盤穿孔機およびコア採取機を装備した地盤調査装置に関する。   The present invention relates to a ground investigation apparatus equipped with a cone penetrating machine, a ground drilling machine, and a core sampling machine for measuring various conditions of construction ground for construction work.

特許文献１に示すように従来の地盤調査装置は、コーン貫入試験機と地盤穿孔機のドリルヘッドが同一軸上に配設されて、コーン貫入試験時はドリルヘッドがコーン貫入用ロッドの邪魔にならないように回動され、同一試験孔でコーン貫入試験と穿孔によるＭＷＤ検層（Ｍｅａｓｕｒｉｎｇ Ｗｈｉｌｅ Ｄｒｉｌｌｉｎｇ）が実施できる。ドリルヘッドは、穿孔用ロッドに回転、打撃、給進力を加えるロータリーパーカッションドリルのドリルヘッドであり、硬い地盤でも掘り進むことができる。ロータリーパーカッションドリルを使用したＭＷＤ検層は地盤の硬さを表すＮ値を効率よく換算し算出できる。コーン貫入試験は、コーンを地盤に押し込んで、先端抵抗、周面摩擦および間隙水圧を測定し、地盤特性の分析を行うもので、Ｎ値と合わせて地盤のさらに詳しい情報を得ることができる。   As shown in Patent Document 1, in the conventional ground investigation device, the drill head of the cone penetration test machine and the ground drilling machine are arranged on the same axis, and the drill head interferes with the cone penetration rod during the cone penetration test. It is rotated so that it does not become a cone, and a cone penetration test and MWD logging (Measuring While Drilling) can be carried out in the same test hole. The drill head is a drill head of a rotary percussion drill that applies rotation, striking, and feeding force to the drilling rod, and can be dug even on hard ground. MWD logging using a rotary percussion drill can efficiently calculate the N value representing the hardness of the ground. The cone penetration test is a method in which the cone is pushed into the ground, the tip resistance, the circumferential friction and the pore water pressure are measured, and the ground characteristics are analyzed. In addition to the N value, more detailed information on the ground can be obtained.

最近では、より詳細な地盤特性の調査分析のため、コア（地盤試料）が求められる。しかしながら、従来の地盤調査装置には、コアを採取するに適した機構が装備されていなかった。   Recently, a core (ground sample) is required for more detailed investigation and analysis of ground characteristics. However, the conventional ground survey device is not equipped with a mechanism suitable for collecting the core.

一般に、ロータリーパーカッションドリルには、図８に示すような、ワイヤライン２６を使用し、コアを採取するコアチューブ１５を挿入した外管９が連結できる。コアチューブ１５は、ワイヤライン２６がラッチ２８に嵌め込まれて引き揚げられ、また吊り下ろされて外管９の底部にセットされる。これによれば外管９に回転、打撃、および給進力が加えられるので、コアの採取は硬い地盤でも容易である。しかし、軟らかい地盤ではコアチューブ１５が外管９の回転に引きずられて回転し、コアが乱れて採取されることがあった。一方、コアチューブ１５が回転しても、硬い地盤では切り出した円柱状のコアは引き上げるまでは底部が地盤とつながっており乱されることがない。このようにワイヤラインによるコア採取機構を地盤調査装置に組み込んでも、必ずしも軟らかい地盤に対応したものとはできないとの問題があった。   In general, a rotary percussion drill can be connected to an outer tube 9 into which a core tube 15 for collecting a core is inserted using a wire line 26 as shown in FIG. The core tube 15 is pulled up with the wire line 26 fitted into the latch 28, and is suspended and set at the bottom of the outer tube 9. According to this, since rotation, striking, and feeding force are applied to the outer tube 9, it is easy to collect the core even on hard ground. However, in soft ground, the core tube 15 is rotated by the rotation of the outer tube 9, and the core is sometimes disturbed and collected. On the other hand, even if the core tube 15 rotates, the bottom of the cylindrical core cut out on the hard ground is connected to the ground and is not disturbed until it is pulled up. As described above, there is a problem that even if the core sampling mechanism by the wire line is incorporated in the ground investigation device, it cannot always correspond to the soft ground.

特開平８−１４４２５７号公報 「コーン貫入試験機兼用穿孔機」Japanese Patent Laid-Open No. 8-144257 “Cone Penetration Tester / Punching Machine”

本発明の目的は、コーン貫入試験と穿孔用ドリルを用いた削孔検層（ＭＷＤ検層）の実施に加えて、軟弱地盤から硬質地盤まで乱れのないコアを採取できる使い勝手のよい地盤調査装置を提供することにある。   The object of the present invention is to provide an easy-to-use ground investigation device capable of collecting a core without any disturbance from a soft ground to a hard ground in addition to a cone penetration test and drilling logging (MWD logging) using a drill for drilling. Is to provide.

本発明による地盤調査装置は、コーン貫入機および地盤穿孔機を有する地盤調査装置において、外管と、下端に地盤試料を採取するコアチューブが連結され上端が地上側に延長されて前記外管に挿入される内管と、前記外管の上部をつかんで回転させる回転機構と、前記内管の上部をつかんで回転しないように保持するグリップ機構を有し、ロアフレームに立設された柱状ガイドに沿って上下動するスライドテーブルに、前記地盤穿孔機の穿孔用ドリルヘッドと切り替え可能に装着されるコア採取用ドリルヘッドと、が備えられたものである。   The ground survey device according to the present invention is a ground survey device having a cone penetrating machine and a ground drilling machine, wherein an outer tube and a core tube for collecting a ground sample are connected to the lower end, and the upper end is extended to the ground side to the outer tube. A columnar guide standing on the lower frame, having an inserted inner tube, a rotating mechanism for gripping and rotating the upper portion of the outer tube, and a grip mechanism for holding the upper portion of the inner tube so as not to rotate. And a core-collecting drill head mounted so as to be switchable with the drilling head of the ground drilling machine.

前記ロアフレームは、地盤に打ち込まれた左右両側のオーガに固定されることが好ましい。   The lower frame is preferably fixed to left and right augers driven into the ground.

本発明による地盤調査装置によれば、地上側に延長された内管の上部をつかんで回転しないように保持するグリップ機構を有するコア採取用ドリルヘッドを設けたので、外管を回転させてもコアチューブが回転せず乱れのないコアを採取できる。また、穿孔用ドリルヘッドとコア採取用ドリルヘッドが切り替え可能にスライドテーブルに装着されるので、使い勝手がよく装置を小型化できる。   According to the ground surveying apparatus according to the present invention, the core collecting drill head having the grip mechanism for holding the upper part of the inner pipe extended to the ground side so as not to rotate is provided. The core tube does not rotate and the core without any disturbance can be collected. In addition, since the drilling head for drilling and the drilling head for core collection are mounted on the slide table in a switchable manner, it is easy to use and the apparatus can be downsized.

また、地盤に打ち込んだオーガで、柱状ガイドが立設されるロアフレームの左右両側を固定したので、約１０トンを超えるおもりを用意する必要がない。大きな給進力を要する深い地盤の調査でも、安定した穿孔とコアの採取ができる。   In addition, since the left and right sides of the lower frame on which the columnar guide is erected are fixed by an auger driven into the ground, it is not necessary to prepare a weight exceeding about 10 tons. Stable drilling and core collection are possible even when investigating deep ground that requires a large feed force.

本発明による地盤調査装置に搭載される柱状ガイドまわりの正面図である。（Ａ）は穿孔用ドリルヘッドが柱状ガイドの中心にある場合で、（Ｂ）はコア採取用ドリルヘッドが柱状ガイドの中心にある場合である。It is a front view around the columnar guide mounted in the ground investigation apparatus by this invention. (A) is the case where the drill head for drilling is at the center of the columnar guide, and (B) is the case where the drilling head for core collection is at the center of the columnar guide. 図１に示すコア採取用ドリルヘッドに装着されるコア採取用の二重管の断面図である。（Ａ）は二重管がコア採取用ドリルヘッドに装着された状態を示し、（Ｂ）は下端にコア採取ビットを有する外管を示し、（Ｃ）は外管に挿入される内管を示す。It is sectional drawing of the double pipe for core collection with which the core collection drill head shown in FIG. 1 is mounted | worn. (A) shows the state where the double pipe is mounted on the core sampling drill head, (B) shows the outer pipe having the core sampling bit at the lower end, and (C) shows the inner pipe inserted into the outer pipe. Show. 図１に示す穿孔用ドリルヘッドに装着される穿孔用ロッドの断面図である。FIG. 2 is a cross-sectional view of a drilling rod attached to the drilling drill head shown in FIG. 1. 図１のロアフレームをオーガに固定した場合の正面図である。It is a front view at the time of fixing the lower frame of FIG. 1 to an auger. 図１の柱状ガイドまわりの側面図である。It is a side view around the columnar guide of FIG. 図１のロアフレームの平面図である。It is a top view of the lower frame of FIG. 本発明による地盤調査装置の側面図である。It is a side view of the ground investigation apparatus by this invention. 従来のワイヤラインを使用したコアチューブの断面である。It is the cross section of the core tube which uses the conventional wire line.

以下、図面を参照して、本発明による地盤調査装置を説明する。   Hereinafter, a ground investigation device according to the present invention will be described with reference to the drawings.

図１は本発明による地盤調査装置１００に搭載される柱状ガイドまわりの正面図である。（Ａ）は穿孔用ドリルヘッド６が柱状ガイド５０の中心にある場合で、（Ｂ）はコア採取用ドリルヘッド７が柱状ガイド５０の中心にある場合を示す。穿孔用ドリルヘッド６は、硬い地盤を掘り進む場合に使用し、図３に示すように、穿孔用ロッド４ａの上端を打撃する打撃機構６ａと、穿孔用ロッド４ａを回転させる回転機構６ｂを備えている。コア採取用ドリルヘッド７は、コアを採取する場合に使用し、図２に示すように、外管９を回転させる回転機構７ａと、内管８の上部を回転しないようにつかむグリップ機構７ｂを備えている。穿孔用ドリルヘッド６とコア採取用ドリルヘッド７は、柱状ガイド５０を挟むように設けられた左右に移動可能な取付け板５３に取り付けられる。穿孔用ドリルヘッド６とコア採取用ドリルヘッド７は、取付け板５３を左右方向に移動していずれか一つをスライドテーブル５１に枢着する。スライドテーブル５１は、油圧モータ５２によって駆動されたチェーンによって、柱状ガイド５０に沿って昇降動作を行なう。スライドテーブル５１は、例えば穿孔用ロッド４ａ（図３参照）に給進力または引き抜き力を与えるものである。このように、穿孔用ドリルヘッド６とコア採取用ドリルヘッド７は、切り替えることができ、図１（Ａ）は穿孔用ドリルヘッド６がスライドテーブル５１に枢着された場合であり、図１（Ｂ）はコア採取用ドリルヘッド７がスライドテーブル５１に枢着された場合である。   FIG. 1 is a front view around a columnar guide mounted on a ground investigation device 100 according to the present invention. (A) shows the case where the drilling drill head 6 is at the center of the columnar guide 50, and (B) shows the case where the core collecting drill head 7 is at the center of the columnar guide 50. The drilling drill head 6 is used when digging a hard ground. As shown in FIG. 3, the drilling head 6 includes a striking mechanism 6a for striking the upper end of the drilling rod 4a and a rotating mechanism 6b for rotating the drilling rod 4a. Yes. The core collecting drill head 7 is used for collecting a core. As shown in FIG. 2, the core collecting drill head 7 includes a rotating mechanism 7a for rotating the outer tube 9 and a grip mechanism 7b for holding the upper portion of the inner tube 8 so as not to rotate. I have. The drilling head 6 for drilling and the drilling head 7 for core collection are attached to a mounting plate 53 that is movable left and right so as to sandwich the columnar guide 50. One of the drilling head 6 for drilling and the drilling head 7 for core collection is pivotally attached to the slide table 51 by moving the mounting plate 53 in the left-right direction. The slide table 51 is moved up and down along the columnar guide 50 by a chain driven by a hydraulic motor 52. The slide table 51 gives, for example, a feeding force or a pulling force to the drilling rod 4a (see FIG. 3). Thus, the drilling drill head 6 and the core-collecting drill head 7 can be switched, and FIG. 1A shows a case where the drilling drill head 6 is pivotally attached to the slide table 51. FIG. B) shows a case where the core-collecting drill head 7 is pivotally attached to the slide table 51.

図１（Ａ）に示すように、柱状ガイド５０が立設されるロアフレーム２０は、左右両側にロアフレーム２０の脚となるアウトリガー３ｂ、３ｂが設けられる。アウトリガー３ｂ、３ｂは油圧で足の部分が伸縮する。ロッドブレーカ４４は、柱状ガイド５０に上下動可能に取り付けられ、ロッドの継ぎ足しあるいは取り外し時に使用する。   As shown in FIG. 1 (A), the lower frame 20 on which the columnar guide 50 is erected is provided with outriggers 3b and 3b serving as legs of the lower frame 20 on both the left and right sides. The outriggers 3b and 3b extend and contract their legs with hydraulic pressure. The rod breaker 44 is attached to the columnar guide 50 so as to be movable up and down, and is used when a rod is added or removed.

図１（Ｂ）に示すように、ロアフレーム２０には、貫入シリンダ４０が立設される。貫入シリンダ４０（図６参照）は、一対の貫入シリンダ４０ａ、４０ａと、一対の貫入シリンダ４０ｂ、４０ｂの４本が設置される。貫入シリンダ４０は、内部のピストンの下端がロアフレーム２０に立設され、外側のシリンダ部が油圧で上下動可能とされる。対角の一対の貫入シリンダ４０ａ、４０ａに上チャック４２が連結され、他の対角の一対の貫入シリンダ４０ｂ、４０ｂに下チャック４３が連結される。上チャック４２と下チャック４３で、コーン貫入用ロッド４ｂ（図７参照）を把持して、地盤に押し込む動作を行なう。コーン５の貫入時は、穿孔用ドリルヘッド６とコア採取用ドリルヘッド７が柱状ガイド５０の中心から外され、コーン貫入用ロッド４ｂの操作に支障がないようにされる。   As shown in FIG. 1B, a penetrating cylinder 40 is erected on the lower frame 20. As for penetration cylinder 40 (refer to Drawing 6), a pair of penetration cylinders 40a and 40a and a pair of penetration cylinders 40b and 40b are installed. The penetration cylinder 40 has a lower end of an internal piston standing on the lower frame 20, and an outer cylinder portion can be moved up and down by hydraulic pressure. The upper chuck 42 is connected to a pair of diagonal penetration cylinders 40a, 40a, and the lower chuck 43 is connected to a pair of other diagonal penetration cylinders 40b, 40b. The upper chuck 42 and the lower chuck 43 hold the cone penetrating rod 4b (see FIG. 7) and push it into the ground. When the cone 5 is penetrated, the drilling drill head 6 and the core collecting drill head 7 are removed from the center of the columnar guide 50 so that the operation of the cone penetrating rod 4b is not hindered.

図２は、図１に示すコア採取用ドリルヘッド７とコア採取用の二重管４ｃの断面図である。図２（Ａ）は外管９と内管８からなる二重管４ｃがコア採取用ドリルヘッドに装着された状態を示す。図２（Ｂ）は下端にコア採取ビット４６を有する外管９のみを示す。図２（Ｃ）は外管９に挿入される内管８のみを示す。図２（Ｂ）、（Ｃ）に示すように、コア採取用の二重管４ｃは、外管９と下端にコアチューブ１５を取り付けた内管８からなる。コアチューブ１５内にコアが採取される。内管８は地上側に延長されており、上端には吊り下げリング１７と注水口１８が設けられる。注水口１８から注入された水は、コアチューブ１５と外管９の間を通過してコア採取ビット４６を冷却する。   FIG. 2 is a sectional view of the core collection drill head 7 and the core collection double pipe 4c shown in FIG. FIG. 2A shows a state in which a double pipe 4c composed of an outer pipe 9 and an inner pipe 8 is mounted on a core collecting drill head. FIG. 2B shows only the outer tube 9 having the core collection bit 46 at the lower end. FIG. 2C shows only the inner tube 8 inserted into the outer tube 9. As shown in FIGS. 2B and 2C, the core collecting double pipe 4c is composed of an outer pipe 9 and an inner pipe 8 having a core tube 15 attached to the lower end. A core is collected in the core tube 15. The inner pipe 8 extends to the ground side, and a hanging ring 17 and a water inlet 18 are provided at the upper end. The water injected from the water injection port 18 passes between the core tube 15 and the outer tube 9 to cool the core collection bit 46.

図２（Ｃ）に示すように、コアチューブ１５は上部にコアチューブヘッド１５ａが設けられる。そして図２（Ａ）の引出円の中に示すように、コアチューブヘッド１５ａとコアチューブ１５の間にはバネ１１が設けられる。バネ１１により、地盤が軟らかい場合はコアチューブ１５の下端が外管９の底部から突出し、地盤が硬い場合には地盤に押し戻されて外管９の底部側に縮む。そのため、軟らかい地盤ではコアチューブ１５の下端がコア採取ビット４６から離れるので、コア採取ビット４６の回転の影響を受けず、乱れのないコアの採取が可能である。   As shown in FIG. 2C, the core tube 15 is provided with a core tube head 15a at the top. 2A, a spring 11 is provided between the core tube head 15a and the core tube 15. As shown in FIG. When the ground is soft, the lower end of the core tube 15 protrudes from the bottom of the outer tube 9, and when the ground is hard, the spring 11 is pushed back to the ground and contracts to the bottom of the outer tube 9. Therefore, since the lower end of the core tube 15 is separated from the core collection bit 46 on soft ground, the core can be collected without being affected by the rotation of the core collection bit 46.

図２（Ａ）に示すように、コア採取用ドリルヘッド７は、外管９を回転させる油圧モータを含む回転機構７ａと、内管８を回転しないようにつかむグリップ機構７ｂを有する。コア採取用ドリルヘッド７はスライドテーブル５１に装着され、油圧モータ５２によって給進力が与えられる。回転機構７ａで外管９が回転されながら一定深さのコアの採取が進むと、内管８を引き抜き、コアチューブ１５を回収する。新しいコアチューブ１５を内管８に取り付け、外管９に挿入して、コアの採取を続行する。コア採取用ドリルヘッド７は、外管９に打撃を与えないが、打撃がなくてもコアの採取は十分に行える。コア採取のため回転機構７ａで外管９を回転させても、内管８はグリップ機構７ｂが押さえているので回転しない。このように、本発明による地盤調査装置１００（図７参照）は、コーン貫入機と地盤穿孔機に加えて、硬い地盤でも軟らかい地盤でも乱れのないコアを採取できるコア採取機を備えている。   As shown in FIG. 2A, the core-collecting drill head 7 has a rotation mechanism 7a including a hydraulic motor that rotates the outer tube 9, and a grip mechanism 7b that holds the inner tube 8 so as not to rotate. The core-collecting drill head 7 is mounted on a slide table 51, and a feeding force is given by a hydraulic motor 52. When the core of a certain depth advances while the outer tube 9 is rotated by the rotating mechanism 7a, the inner tube 8 is pulled out and the core tube 15 is recovered. A new core tube 15 is attached to the inner tube 8 and inserted into the outer tube 9 to continue the core collection. The core-collecting drill head 7 does not strike the outer tube 9, but the core can be sufficiently collected even if there is no impact. Even if the outer tube 9 is rotated by the rotating mechanism 7a for core collection, the inner tube 8 does not rotate because the grip mechanism 7b holds the inner tube 8. As described above, the ground investigation device 100 (see FIG. 7) according to the present invention includes a core collecting machine that can collect a core that is not disturbed by a hard ground or a soft ground in addition to a cone penetrating machine and a ground drilling machine.

図３は、図１に示す穿孔用ドリルヘッドに装着する穿孔用ロッド４ａの断面図である。穿孔用ロッド４ａは、下端に穿孔用掘削ビット４５が設けられ、上端は穿孔用ドリルヘッド６に連結される。穿孔用ドリルヘッド６は、穿孔用ロッド４ａの上端を打撃する打撃部６ａと穿孔用ロッド４ａをつかんで回転させる回転機構６ｂからなる。穿孔用ドリルヘッド６は、コアを採取することなく目的の深さまで掘り進めるような場合に有効である。   FIG. 3 is a cross-sectional view of the drilling rod 4a attached to the drilling drill head shown in FIG. The drilling rod 4 a is provided with a drilling bit 45 for drilling at the lower end and is connected to the drilling head 6 at the upper end. The drilling drill head 6 includes a hitting portion 6a that hits the upper end of the drilling rod 4a and a rotating mechanism 6b that holds and rotates the drilling rod 4a. The drilling head 6 for drilling is effective when digging to a target depth without collecting the core.

図４は、図１に示すロアフレーム２０をオーガ２２に固定した場合の正面図である。ロアフレーム２０左右両側にはオーガ２２に固定する連結金具２３が設けられる。オーガ２２は、あらかじめ地中に埋め込んでおく。オーガ２２の打ち込みに穿孔用ドリルヘッド６を使用してもよい。打ち込まれた２つのオーガ２２の中央に地盤調査装置１００を移動し、ロアフレーム２０を連結する。図４の引出円の中に示すように、連結金具２３は、オーガ側金具２３ａとロアフレーム側金具２３ｂから構成される。   FIG. 4 is a front view when the lower frame 20 shown in FIG. 1 is fixed to the auger 22. On both the left and right sides of the lower frame 20, connection fittings 23 are provided for fixing to the auger 22. The auger 22 is embedded in advance in the ground. A drilling drill head 6 may be used for driving the auger 22. The ground survey device 100 is moved to the center of the two augers 22 that have been driven, and the lower frame 20 is connected. As shown in the drawing circle of FIG. 4, the connection fitting 23 is composed of an auger side fitting 23a and a lower frame side fitting 23b.

図５は、図１に示す柱状ガイドまわりの側面図である。柱状ガイド５０はロアフレーム２０に立設され、上端に油圧モータ５２が設けられる。油圧モータ５２がチェーンを駆動してスライドテーブル５１を昇降させる。これによりスライドテーブル５１に装着された穿孔用ドリルヘッド６またはコア採取用ドリルヘッド７が昇降する。スライドテーブル５１の下降は、例えば穿孔用ロッド４ａに給進力を与え、スライドテーブル５１の上昇は、引き抜き力を与える。ロアフレーム２０は、昇降シリンダ３０で吊り下げられているので、昇降シリンダ３０を下げることによって、地盤におろすことができる。貫入シリンダ４０は、ロアフレーム２０に立設され、上チャック４２と下チャック４３を上下動させる。ロッドブレーカ４４は、柱状ガイド５０に取り付けられコーン貫入用ロッド４ｂの継ぎ足しまたは取り外し時に使用する。   FIG. 5 is a side view around the columnar guide shown in FIG. The columnar guide 50 is erected on the lower frame 20, and a hydraulic motor 52 is provided at the upper end. The hydraulic motor 52 drives the chain to raise and lower the slide table 51. Accordingly, the drilling drill head 6 or the core collecting drill head 7 mounted on the slide table 51 moves up and down. The lowering of the slide table 51 gives, for example, a feeding force to the drilling rod 4a, and the raising of the slide table 51 gives a pulling force. Since the lower frame 20 is suspended by the elevating cylinder 30, the lower frame 20 can be lowered to the ground by lowering the elevating cylinder 30. The penetration cylinder 40 is erected on the lower frame 20 and moves the upper chuck 42 and the lower chuck 43 up and down. The rod breaker 44 is attached to the columnar guide 50 and used when adding or removing the cone penetrating rod 4b.

図６は、図１に示すロアフレームの平面図である。ロアフレーム２０の中央には貫通孔２５が設けられる。貫通孔２５は、穿孔用ロッド４ａ、コーン貫入用ロッド４ｂ、コア採取用の二重管４ｃのうち１つが挿通される。ロッド貫通孔２５を囲むように貫入シリンダ４０が設けられ、対角線上の（４０ａ、４０ａ）と（４０ｂ、４０ｂ）が対とされ、上チャックまたは下チャックが取り付けられる。昇降シリンダ３０はロアフレーム２０を昇降させ、左右のアウトリガー３ｂ、３ｂはロアフレーム２０の脚となる。ロアフレーム２０の左右両側にオーガ２２と連結するロアフレーム側金具２３ｂが設けられる。   FIG. 6 is a plan view of the lower frame shown in FIG. A through hole 25 is provided in the center of the lower frame 20. One of the drilling rod 4a, the cone penetrating rod 4b, and the core collecting double tube 4c is inserted into the through hole 25. A penetrating cylinder 40 is provided so as to surround the rod through hole 25, diagonally (40a, 40a) and (40b, 40b) are paired, and an upper chuck or a lower chuck is attached. The elevating cylinder 30 raises and lowers the lower frame 20, and the left and right outriggers 3 b and 3 b serve as legs of the lower frame 20. Lower frame side metal fittings 23 b connected to the auger 22 are provided on both the left and right sides of the lower frame 20.

図７は、本発明による地盤調査装置の側面図である。地盤調査装置１００は、前端に脚となるアウトリガー３ａが設けられ、後端には左右にアウトリガー３ｂが設けられる。コア採取用ドリルヘッド７は車両後方に位置しており、車両後方下部にコーン貫入用ロッド４ｂと、コーン５と、貫入シリンダ４０がある。車体を支える車台２の上に架台１０が連接される。   FIG. 7 is a side view of the ground investigation device according to the present invention. The ground survey device 100 is provided with an outrigger 3a as a leg at the front end and an outrigger 3b at the left and right at the rear end. The core-collecting drill head 7 is located at the rear of the vehicle, and a cone-penetrating rod 4b, a cone 5 and a penetrating cylinder 40 are provided at the lower rear of the vehicle. The gantry 10 is connected on the chassis 2 that supports the vehicle body.

本発明は、コーン貫入試験とＭＷＤ検層の実施に加えて、軟弱地盤から硬質地盤まで乱れのないコア採取が可能な地盤調査装置として好適である。   INDUSTRIAL APPLICABILITY The present invention is suitable as a ground surveying apparatus that can collect cores from soft ground to hard ground in addition to performing a cone penetration test and MWD logging.

２ 車台
３ａ 前方アウトリガー
３ｂ 後方アウトリガー
４ａ 穿孔用ロッド
４ｂ コーン貫入用ロッド
４ｃ コア採取用の二重管
５ コーン
６ 穿孔用ドリルヘッド
６ａ 打撃機構
６ｂ 回転機構
７ コア採取用ドリルヘッド
７ａ 回転機構
７ｂ グリップ機構
８ 内管
９ 外管
１０ 架台
１０ａ ガイドシュー
１１ バネ
１５ コアチューブ
１５ａ コアチューブヘッド
１７ 吊り下げリング
１８ 注水口
２０ ロアフレーム
２２ オーガ
２３ 連結金具
２３ａ オーガ側金具
２３ｂ ロアフレーム側金具
２５ 貫通孔
２６ ワイヤライン
２７ オーバーショットアセンブリ
２８ ラッチ
３０ 昇降シリンダ
４０ 貫入シリンダ
４２ 上チャック
４３ 下チャック
４４ ロッドブレーカ
４５ 穿孔用掘削ビット
４６ コア採取ビット
５０ 柱状ガイド
５１ スライドテーブル
５２ 油圧モータ
５３ 取付け板
７０ コアサンプリング装置
１００ 地盤調査装置 2 chassis 3a front outrigger 3b rear outrigger 4a drilling rod 4b cone penetration rod 4c double pipe for core collection 5 cone 6 drilling drill head 6a impact mechanism 6b rotation mechanism 7 core collection drill head 7a rotation mechanism 7b grip mechanism 8 Inner tube 9 Outer tube 10 Base 10a Guide shoe 11 Spring 15 Core tube 15a Core tube head 17 Suspension ring 18 Water inlet 20 Lower frame 22 Auger 23 Connecting bracket 23a Auger side bracket 23b Lower frame side bracket 25 Through-hole 26 Wire line 27 Overshot assembly 28 Latch 30 Elevating cylinder 40 Penetration cylinder 42 Upper chuck 43 Lower chuck 44 Rod breaker 45 Drilling bit for drilling 46 Core collection bit 50 Columnar guide 51 Sliding tape Table 52 Hydraulic motor 53 Mounting plate 70 Core sampling device 100 Ground survey device

Claims (2)

コーン貫入機および地盤穿孔機を有する地盤調査装置において、
外管と、
下端に地盤試料を採取するコアチューブが連結され上端が地上側に延長されて前記外管に挿入される内管と、
前記外管の上部をつかんで回転させる回転機構と、前記内管の上部をつかんで回転しないように保持するグリップ機構を有し、ロアフレームに立設された柱状ガイドに沿って上下動するスライドテーブルに、前記地盤穿孔機の穿孔用ドリルヘッドと切り替え可能に装着されるコア採取用ドリルヘッドと、が備えられることを特徴とする地盤調査装置。
In a ground surveying device having a cone penetrating machine and a ground drilling machine,
An outer tube,
A core tube for collecting a ground sample is connected to the lower end, and an upper end is extended to the ground side and inserted into the outer tube,
A slide mechanism that has a rotating mechanism that grips and rotates the upper part of the outer tube and a grip mechanism that holds the upper part of the inner tube so as not to rotate, and moves up and down along a columnar guide standing on the lower frame A ground surveying device, characterized in that the table is provided with a drilling head for drilling of the ground drilling machine and a cored drilling head mounted so as to be switchable.
前記ロアフレームは、地盤に打ち込まれた左右両側のオーガに固定されることを特徴とする請求項１に記載の地盤調査装置。
The ground survey device according to claim 1, wherein the lower frame is fixed to left and right augers driven into the ground.
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